* [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
@ 2009-11-02 10:04 ` Jan Blunck
0 siblings, 0 replies; 70+ messages in thread
From: Jan Blunck @ 2009-11-02 10:04 UTC (permalink / raw)
To: linux-fsdevel
Cc: Latchesar Ionkov, Andreas Dilger, Anders Larsen, J. Bruce Fields,
Christoph Hellwig, Alessio Igor Bogani, Arte m Bityutskiy,
James Morris, Petr Vandrovec, KOSAKI Motohiro, Abhishek Kulkarni,
Matthew Wilcox, Eric Van Hensbergen, Al Viro, Matt Mackall,
Thomas Gleixner, Dustin Kirkland, Tigran A. Aivazian,
linux-kernel, Sukadev Bhattiprolu, Chuck Lever, Tejun Heo,
Serge Hallyn, Csaba Henk
I've read through all the code formerly covered by the BKL inside
do_kern_mount() and have satisfied myself that it doesn't need the BKL
any more.
do_kern_mount() is already called without the BKL when mounting the rootfs
and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called
from various places without BKL: simple_pin_fs(), nfs_do_clone_mount()
through nfs_follow_mountpoint(), afs_mntpt_do_automount() through
afs_mntpt_follow_link(). Both later functions are actually the filesystems
follow_link inode operation. vfs_kern_mount() is calling the specified
get_sb function and lets the filesystem do its job by calling the given
fill_super function.
Therefore I think it is safe to push down the BKL from the VFS to the
low-level filesystems get_sb/fill_super operation.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Matthew Wilcox <matthew@wil.cx>
---
fs/9p/vfs_super.c | 9 ++++++++-
fs/adfs/super.c | 8 +++++++-
fs/affs/super.c | 9 ++++++++-
fs/afs/super.c | 5 +++++
fs/autofs4/inode.c | 4 ++++
fs/befs/linuxvfs.c | 4 ++++
fs/bfs/inode.c | 9 ++++++++-
fs/binfmt_misc.c | 6 +++++-
fs/btrfs/super.c | 8 +++++++-
fs/cifs/cifsfs.c | 12 ++++++++++--
fs/coda/inode.c | 8 +++++++-
fs/configfs/mount.c | 5 +++++
fs/cramfs/inode.c | 8 +++++++-
fs/devpts/inode.c | 13 +++++++++++--
fs/ecryptfs/main.c | 3 +++
fs/efs/super.c | 10 ++++++++--
fs/exofs/super.c | 7 ++++++-
fs/ext2/super.c | 10 ++++++++--
fs/ext3/super.c | 9 ++++++++-
fs/ext4/super.c | 9 ++++++---
fs/fat/namei_msdos.c | 6 +++++-
fs/fat/namei_vfat.c | 6 +++++-
fs/freevxfs/vxfs_super.c | 7 ++++++-
fs/fuse/control.c | 9 ++++++++-
fs/fuse/inode.c | 5 +++++
fs/gfs2/ops_fstype.c | 9 +++++++++
fs/hfs/super.c | 8 +++++++-
fs/hfsplus/super.c | 8 +++++++-
fs/hostfs/hostfs_kern.c | 4 ++++
fs/hpfs/super.c | 8 +++++++-
fs/hppfs/hppfs.c | 4 ++++
fs/hugetlbfs/inode.c | 12 ++++++++++--
fs/isofs/inode.c | 8 +++++++-
fs/jffs2/super.c | 11 +++++++++--
fs/jfs/super.c | 14 ++++++++++++--
fs/libfs.c | 10 +++++++++-
fs/minix/inode.c | 8 +++++++-
fs/namespace.c | 2 --
fs/ncpfs/inode.c | 8 +++++++-
fs/nfs/super.c | 19 +++++++++++++++++++
fs/nfsd/nfsctl.c | 7 ++++++-
fs/nilfs2/super.c | 9 ++++++++-
fs/ntfs/super.c | 5 +++++
fs/ocfs2/dlm/dlmfs.c | 8 +++++++-
fs/ocfs2/super.c | 5 +++++
fs/omfs/inode.c | 7 ++++++-
fs/openpromfs/inode.c | 4 ++++
fs/proc/root.c | 9 ++++++++-
fs/qnx4/inode.c | 8 +++++++-
fs/ramfs/inode.c | 5 +++++
fs/reiserfs/super.c | 4 ++++
fs/romfs/super.c | 9 ++++++++-
fs/smbfs/inode.c | 5 +++++
fs/squashfs/super.c | 6 ++++++
fs/sysfs/mount.c | 6 ++++++
fs/sysv/super.c | 24 +++++++++++++++++++-----
fs/ubifs/super.c | 5 +++++
fs/udf/super.c | 8 +++++++-
fs/ufs/super.c | 5 +++++
fs/xfs/linux-2.6/xfs_super.c | 4 ++++
60 files changed, 412 insertions(+), 53 deletions(-)
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 14a8644..4156a0c 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -106,11 +106,15 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
struct p9_fid *fid;
int retval = 0;
+ lock_kernel();
+
P9_DPRINTK(P9_DEBUG_VFS, " \n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
- if (!v9ses)
+ if (!v9ses) {
+ unlock_kernel();
return -ENOMEM;
+ }
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
@@ -155,6 +159,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
free_stat:
@@ -167,12 +172,14 @@ clunk_fid:
close_session:
v9fs_session_close(v9ses);
kfree(v9ses);
+ unlock_kernel();
return retval;
release_sb:
p9stat_free(st);
kfree(st);
deactivate_locked_super(sb);
+ unlock_kernel();
return retval;
}
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 6910a98..e94f111 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -351,11 +351,15 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
struct adfs_sb_info *asb;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_NODIRATIME;
asb = kzalloc(sizeof(*asb), GFP_KERNEL);
- if (!asb)
+ if (!asb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = asb;
/* set default options */
@@ -473,6 +477,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
goto error;
} else
sb->s_root->d_op = &adfs_dentry_operations;
+ unlock_kernel();
return 0;
error_free_bh:
@@ -480,6 +485,7 @@ error_free_bh:
error:
sb->s_fs_info = NULL;
kfree(asb);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 104fdcb..135f0d3 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -298,6 +298,8 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
u8 sig[4];
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, data);
pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
@@ -307,8 +309,10 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_flags |= MS_NODIRATIME;
sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
mutex_init(&sbi->s_bmlock);
@@ -316,6 +320,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
&blocksize,&sbi->s_prefix,
sbi->s_volume, &mount_flags)) {
printk(KERN_ERR "AFFS: Error parsing options\n");
+ unlock_kernel();
return -EINVAL;
}
/* N.B. after this point s_prefix must be released */
@@ -486,6 +491,7 @@ got_root:
sb->s_root->d_op = &affs_dentry_operations;
pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
+ unlock_kernel();
return 0;
/*
@@ -500,6 +506,7 @@ out_error_noinode:
kfree(sbi->s_prefix);
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/afs/super.c b/fs/afs/super.c
index e1ea1c2..108fb3e 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -294,12 +294,15 @@ static int afs_fill_super(struct super_block *sb, void *data)
struct inode *inode = NULL;
int ret;
+ lock_kernel();
+
_enter("");
/* allocate a superblock info record */
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
if (!as) {
_leave(" = -ENOMEM");
+ unlock_kernel();
return -ENOMEM;
}
@@ -329,6 +332,7 @@ static int afs_fill_super(struct super_block *sb, void *data)
sb->s_root = root;
_leave(" = 0");
+ unlock_kernel();
return 0;
error_inode:
@@ -342,6 +346,7 @@ error:
sb->s_fs_info = NULL;
_leave(" = %d", ret);
+ unlock_kernel();
return ret;
}
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 69c8142..3adaba9 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -323,6 +323,8 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
struct autofs_sb_info *sbi;
struct autofs_info *ino;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto fail_unlock;
@@ -418,6 +420,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
* Success! Install the root dentry now to indicate completion.
*/
s->s_root = root;
+ unlock_kernel();
return 0;
/*
@@ -439,6 +442,7 @@ fail_free:
kfree(sbi);
s->s_fs_info = NULL;
fail_unlock:
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 33baf27..f2aa193 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -759,6 +759,8 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
const unsigned long sb_block = 0;
const off_t x86_sb_off = 512;
+ lock_kernel();
+
save_mount_options(sb, data);
sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
@@ -867,6 +869,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
befs_sb->nls = load_nls_default();
}
+ unlock_kernel();
return 0;
/*****************/
unacquire_bh:
@@ -877,6 +880,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
unacquire_none:
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 6f60336..4bff506 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -356,9 +356,13 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
long ret = -EINVAL;
unsigned long i_sblock, i_eblock, i_eoff, s_size;
+ lock_kernel();
+
info = kzalloc(sizeof(*info), GFP_KERNEL);
- if (!info)
+ if (!info) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = info;
sb_set_blocksize(s, BFS_BSIZE);
@@ -463,6 +467,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
kfree(info->si_imap);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return -EIO;
}
@@ -484,12 +489,14 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
}
dump_imap("read_super", s);
mutex_init(&info->bfs_lock);
+ unlock_kernel();
return 0;
out:
brelse(bh);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c4e8353..ca0e22d 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -695,9 +695,13 @@ static int bm_fill_super(struct super_block * sb, void * data, int silent)
[3] = {"register", &bm_register_operations, S_IWUSR},
/* last one */ {""}
};
- int err = simple_fill_super(sb, 0x42494e4d, bm_files);
+ int err;
+
+ lock_kernel();
+ err = simple_fill_super(sb, 0x42494e4d, bm_files);
if (!err)
sb->s_op = &s_ops;
+ unlock_kernel();
return err;
}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 752a546..e5cd2cf 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -480,13 +480,17 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
fmode_t mode = FMODE_READ;
int error = 0;
+ lock_kernel();
+
if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
error = btrfs_parse_early_options(data, mode, fs_type,
&subvol_name, &fs_devices);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
error = btrfs_scan_one_device(dev_name, mode, fs_type, &fs_devices);
if (error)
@@ -555,6 +559,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
mnt->mnt_root = root;
kfree(subvol_name);
+ unlock_kernel();
return 0;
error_s:
@@ -563,6 +568,7 @@ error_close_devices:
btrfs_close_devices(fs_devices);
error_free_subvol_name:
kfree(subvol_name);
+ unlock_kernel();
return error;
}
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 9a5e4f5..09ccb9d 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -596,22 +596,30 @@ cifs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
int rc;
- struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
+ struct super_block *sb;
+
+ lock_kernel();
+
+ sb = sget(fs_type, NULL, set_anon_super, NULL);
cFYI(1, ("Devname: %s flags: %d ", dev_name, flags));
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
sb->s_flags = flags;
rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
if (rc) {
deactivate_locked_super(sb);
+ unlock_kernel();
return rc;
}
sb->s_flags |= MS_ACTIVE;
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 830f51a..d081fc5 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -147,6 +147,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
int error;
int idx;
+ lock_kernel();
+
idx = get_device_index((struct coda_mount_data *) data);
/* Ignore errors in data, for backward compatibility */
@@ -158,11 +160,13 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
vc = &coda_comms[idx];
if (!vc->vc_inuse) {
printk("coda_read_super: No pseudo device\n");
+ unlock_kernel();
return -EINVAL;
}
if ( vc->vc_sb ) {
printk("coda_read_super: Device already mounted\n");
+ unlock_kernel();
return -EBUSY;
}
@@ -196,7 +200,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root = d_alloc_root(root);
if (!sb->s_root)
goto error;
- return 0;
+ unlock_kernel();
+ return 0;
error:
if (root)
@@ -204,6 +209,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
if (vc)
vc->vc_sb = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 8421cea..5b2e06e 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -71,6 +71,8 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = CONFIGFS_MAGIC;
@@ -87,6 +89,7 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
inc_nlink(inode);
} else {
pr_debug("configfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -94,12 +97,14 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
config_group_init(&configfs_root_group);
configfs_root_group.cg_item.ci_dentry = root;
root->d_fsdata = &configfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index dd3634e..13e696a 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -227,11 +227,15 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
struct cramfs_sb_info *sbi;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_RDONLY;
sbi = kzalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* Invalidate the read buffers on mount: think disk change.. */
@@ -308,10 +312,12 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
iput(root);
goto out;
}
+ unlock_kernel();
return 0;
out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index d5f8c96..e206eef 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -24,6 +24,7 @@
#include <linux/parser.h>
#include <linux/fsnotify.h>
#include <linux/seq_file.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define DEVPTS_DEFAULT_MODE 0600
/*
@@ -363,17 +364,23 @@ static int devpts_get_sb(struct file_system_type *fs_type,
struct pts_mount_opts opts;
struct super_block *s;
+ lock_kernel();
+
error = parse_mount_options(data, PARSE_MOUNT, &opts);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
if (opts.newinstance)
s = sget(fs_type, NULL, set_anon_super, NULL);
else
s = sget(fs_type, compare_init_pts_sb, set_anon_super, NULL);
- if (IS_ERR(s))
+ if (IS_ERR(s)) {
+ unlock_kernel();
return PTR_ERR(s);
+ }
if (!s->s_root) {
s->s_flags = flags;
@@ -391,6 +398,7 @@ static int devpts_get_sb(struct file_system_type *fs_type,
if (error)
goto out_dput;
+ unlock_kernel();
return 0;
out_dput:
@@ -398,6 +406,7 @@ out_dput:
out_undo_sget:
deactivate_locked_super(s);
+ unlock_kernel();
return error;
}
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index c6ac85d..fdc7bda 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -600,6 +600,8 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
int rc;
struct super_block *sb;
+ lock_kernel();
+
rc = get_sb_nodev(fs_type, flags, raw_data, ecryptfs_fill_super, mnt);
if (rc < 0) {
printk(KERN_ERR "Getting sb failed; rc = [%d]\n", rc);
@@ -621,6 +623,7 @@ out_abort:
dput(sb->s_root); /* aka mnt->mnt_root, as set by get_sb_nodev() */
deactivate_locked_super(sb);
out:
+ unlock_kernel();
return rc;
}
diff --git a/fs/efs/super.c b/fs/efs/super.c
index f049428..0981141 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -249,9 +249,13 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
struct inode *root;
int ret = -EINVAL;
- sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
- if (!sb)
+ lock_kernel();
+
+ sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
+ if (!sb) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sb;
s->s_magic = EFS_SUPER_MAGIC;
@@ -319,12 +323,14 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
goto out_no_fs;
}
+ unlock_kernel();
return 0;
out_no_fs_ul:
out_no_fs:
s->s_fs_info = NULL;
kfree(sb);
+ unlock_kernel();
return ret;
}
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 9f500de..ea045b8 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -297,9 +297,13 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
struct osd_obj_id obj;
int ret;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* use mount options to fill superblock */
@@ -399,6 +403,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
out:
if (or)
osd_end_request(or);
+ unlock_kernel();
return ret;
free_sbi:
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 1a9ffee..5af1775 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -745,15 +745,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
+ err = -ENOMEM;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
- return -ENOMEM;
+ goto failed_unlock;
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
- return -ENOMEM;
+ goto failed_unlock;
}
sb->s_fs_info = sbi;
sbi->s_sb_block = sb_block;
@@ -1063,6 +1066,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
ext2_warning(sb, __func__,
"mounting ext3 filesystem as ext2");
ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+ unlock_kernel();
return 0;
cantfind_ext2:
@@ -1086,6 +1090,8 @@ failed_sbi:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
+failed_unlock:
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 7a520a8..38261a5 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1568,14 +1568,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -1992,6 +1997,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
"writeback");
lock_kernel();
+ unlock_kernel();
return 0;
cantfind_ext3:
@@ -2022,6 +2028,7 @@ out_fail:
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
lock_kernel();
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 312211e..9db81d2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2328,14 +2328,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
int err;
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -2913,7 +2918,6 @@ no_journal:
ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr);
- lock_kernel();
return 0;
cantfind_ext4:
@@ -2959,7 +2963,6 @@ out_fail:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
- lock_kernel();
return ret;
}
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index bbc94ae..31dd072 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -662,12 +662,16 @@ static int msdos_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
sb->s_flags |= MS_NOATIME;
sb->s_root->d_op = &msdos_dentry_operations;
+ unlock_kernel();
return 0;
}
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index f565f24..12961b8 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -1044,15 +1044,19 @@ static int vfat_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &vfat_dir_inode_operations, 1);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
if (MSDOS_SB(sb)->options.name_check != 's')
sb->s_root->d_op = &vfat_ci_dentry_ops;
else
sb->s_root->d_op = &vfat_dentry_ops;
+ unlock_kernel();
return 0;
}
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index 1e8af93..b8b7821 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -148,7 +148,7 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data)
* The superblock on success, else %NULL.
*
* Locking:
- * We are under the bkl and @sbp->s_lock.
+ * We are under @sbp->s_lock.
*/
static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
{
@@ -159,11 +159,14 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
struct inode *root;
int ret = -EINVAL;
+ lock_kernel();
+
sbp->s_flags |= MS_RDONLY;
infp = kzalloc(sizeof(*infp), GFP_KERNEL);
if (!infp) {
printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -236,6 +239,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
goto out_free_ilist;
}
+ unlock_kernel();
return 0;
out_free_ilist:
@@ -245,6 +249,7 @@ out_free_ilist:
out:
brelse(bp);
kfree(infp);
+ unlock_kernel();
return ret;
}
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 3773fd6..8d769f7 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -10,6 +10,7 @@
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define FUSE_CTL_SUPER_MAGIC 0x65735543
@@ -297,9 +298,13 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
struct fuse_conn *fc;
int err;
+ lock_kernel();
+
err = simple_fill_super(sb, FUSE_CTL_SUPER_MAGIC, &empty_descr);
- if (err)
+ if (err) {
+ unlock_kernel();
return err;
+ }
mutex_lock(&fuse_mutex);
BUG_ON(fuse_control_sb);
@@ -309,10 +314,12 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
if (err) {
fuse_control_sb = NULL;
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return err;
}
}
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return 0;
}
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1a822ce..5690279 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -20,6 +20,7 @@
#include <linux/random.h>
#include <linux/sched.h>
#include <linux/exportfs.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
MODULE_DESCRIPTION("Filesystem in Userspace");
@@ -919,6 +920,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
int err;
int is_bdev = sb->s_bdev != NULL;
+ lock_kernel();
+
err = -EINVAL;
if (sb->s_flags & MS_MANDLOCK)
goto err;
@@ -1022,6 +1025,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
fuse_send_init(fc, init_req);
+ unlock_kernel();
return 0;
err_unlock:
@@ -1036,6 +1040,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
err_fput:
fput(file);
err:
+ unlock_kernel();
return err;
}
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 52fb6c0..76415fe 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1120,9 +1120,12 @@ static int fill_super(struct super_block *sb, void *data, int silent)
struct gfs2_holder mount_gh;
int error;
+ lock_kernel();
+
sdp = init_sbd(sb);
if (!sdp) {
printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -1211,6 +1214,7 @@ static int fill_super(struct super_block *sb, void *data, int silent)
gfs2_glock_dq_uninit(&mount_gh);
gfs2_online_uevent(sdp);
+ unlock_kernel();
return 0;
fail_threads:
@@ -1240,6 +1244,7 @@ fail:
gfs2_delete_debugfs_file(sdp);
kfree(sdp);
sb->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
@@ -1268,10 +1273,12 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
struct path path;
int error;
+ lock_kernel();
error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
if (error) {
printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
dev_name, error);
+ unlock_kernel();
return error;
}
s = sget(&gfs2_fs_type, test_meta_super, set_meta_super,
@@ -1279,11 +1286,13 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
path_put(&path);
if (IS_ERR(s)) {
printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
+ unlock_kernel();
return PTR_ERR(s);
}
sdp = s->s_fs_info;
mnt->mnt_sb = s;
mnt->mnt_root = dget(sdp->sd_master_dir);
+ unlock_kernel();
return 0;
}
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index f7fcbe4..a2e19ff 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -381,9 +381,13 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root_inode;
int res;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -429,6 +433,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root->d_op = &hfs_dentry_operations;
/* everything's okay */
+ unlock_kernel();
return 0;
bail_iput:
@@ -437,6 +442,7 @@ bail_no_root:
printk(KERN_ERR "hfs: get root inode failed.\n");
bail:
hfs_mdb_put(sb);
+ unlock_kernel();
return res;
}
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 43022f3..824f57a 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -312,9 +312,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
struct nls_table *nls = NULL;
int err = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -459,11 +463,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
out:
unload_nls(sbi->nls);
sbi->nls = nls;
+ unlock_kernel();
return 0;
cleanup:
hfsplus_put_super(sb);
unload_nls(nls);
+ unlock_kernel();
return err;
}
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 032604e..5eb2c26 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -968,6 +968,8 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
char *host_root_path, *req_root = d;
int err;
+ lock_kernel();
+
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = HOSTFS_SUPER_MAGIC;
@@ -1016,6 +1018,7 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
goto out;
}
+ unlock_kernel();
return 0;
out_put:
@@ -1023,6 +1026,7 @@ out_put:
out_free:
kfree(host_root_path);
out:
+ unlock_kernel();
return err;
}
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2feaa0..a7b348a 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -477,11 +477,15 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
int o;
+ lock_kernel();
+
save_mount_options(s, options);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
sbi->sb_bmp_dir = NULL;
@@ -666,6 +670,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
root->i_blocks = 5;
hpfs_brelse4(&qbh);
}
+ unlock_kernel();
return 0;
bail4: brelse(bh2);
@@ -677,6 +682,7 @@ bail0:
kfree(sbi->sb_cp_table);
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index a5089a6..6263973 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -712,6 +712,8 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
struct vfsmount *proc_mnt;
int err = -ENOENT;
+ lock_kernel();
+
proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
if (IS_ERR(proc_mnt))
goto out;
@@ -731,6 +733,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
if (!sb->s_root)
goto out_iput;
+ unlock_kernel();
return 0;
out_iput:
@@ -738,6 +741,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
out_mntput:
mntput(proc_mnt);
out:
+ unlock_kernel();
return(err);
}
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 87a1258..53be2b9 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -32,6 +32,7 @@
#include <linux/security.h>
#include <linux/ima.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -824,6 +825,7 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
struct hugetlbfs_config config;
struct hugetlbfs_sb_info *sbinfo;
+ lock_kernel();
save_mount_options(sb, data);
config.nr_blocks = -1; /* No limit on size by default */
@@ -833,12 +835,16 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
config.mode = 0755;
config.hstate = &default_hstate;
ret = hugetlbfs_parse_options(data, &config);
- if (ret)
+ if (ret) {
+ unlock_kernel();
return ret;
+ }
sbinfo = kmalloc(sizeof(struct hugetlbfs_sb_info), GFP_KERNEL);
- if (!sbinfo)
+ if (!sbinfo) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbinfo;
sbinfo->hstate = config.hstate;
spin_lock_init(&sbinfo->stat_lock);
@@ -863,9 +869,11 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
goto out_free;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
out_free:
kfree(sbinfo);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 6b4dcd4..7c501d5 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -571,11 +571,15 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
int table, error = -EINVAL;
unsigned int vol_desc_start;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
if (!parse_options((char *)data, &opt))
@@ -895,6 +899,7 @@ root_found:
kfree(opt.iocharset);
+ unlock_kernel();
return 0;
/*
@@ -934,6 +939,7 @@ out_freesbi:
kfree(opt.iocharset);
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 9a80e8e..622bd51 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -148,14 +148,19 @@ static const struct super_operations jffs2_super_operations =
static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
{
struct jffs2_sb_info *c;
+ int ret;
+
+ lock_kernel();
D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():"
" New superblock for device %d (\"%s\")\n",
sb->s_mtd->index, sb->s_mtd->name));
c = kzalloc(sizeof(*c), GFP_KERNEL);
- if (!c)
+ if (!c) {
+ unlock_kernel();
return -ENOMEM;
+ }
c->mtd = sb->s_mtd;
c->os_priv = sb;
@@ -177,7 +182,9 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
#endif
- return jffs2_do_fill_super(sb, data, silent);
+ ret = jffs2_do_fill_super(sb, data, silent);
+ unlock_kernel();
+ return ret;
}
static int jffs2_get_sb(struct file_system_type *fs_type,
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 2234c73..329d7b6 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -425,14 +425,20 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
s64 newLVSize = 0;
int flag, ret = -EINVAL;
+ lock_kernel();
+
jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
- if (!new_valid_dev(sb->s_bdev->bd_dev))
+ if (!new_valid_dev(sb->s_bdev->bd_dev)) {
+ unlock_kernel();
return -EOVERFLOW;
+ }
sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
sbi->sb = sb;
sbi->uid = sbi->gid = sbi->umask = -1;
@@ -442,6 +448,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
sbi->flag = flag;
@@ -452,6 +459,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (newLVSize) {
printk(KERN_ERR "resize option for remount only\n");
+ unlock_kernel();
return -EINVAL;
}
@@ -527,6 +535,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
#endif
sb->s_time_gran = 1;
+ unlock_kernel();
return 0;
out_no_root:
@@ -548,6 +557,7 @@ out_kfree:
if (sbi->nls_tab)
unload_nls(sbi->nls_tab);
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/libfs.c b/fs/libfs.c
index 219576c..3484040 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -11,6 +11,7 @@
#include <linux/exportfs.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -422,6 +423,8 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
struct dentry *dentry;
int i;
+ lock_kernel();
+
s->s_blocksize = PAGE_CACHE_SIZE;
s->s_blocksize_bits = PAGE_CACHE_SHIFT;
s->s_magic = magic;
@@ -429,8 +432,10 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
s->s_time_gran = 1;
inode = new_inode(s);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
/*
* because the root inode is 1, the files array must not contain an
* entry at index 1
@@ -444,6 +449,7 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
for (i = 0; !files->name || files->name[0]; i++, files++) {
@@ -469,10 +475,12 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
d_add(dentry, inode);
}
s->s_root = root;
+ unlock_kernel();
return 0;
out:
d_genocide(root);
dput(root);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 74ea82d..b8aa0a6 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -147,9 +147,13 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
struct minix_sb_info *sbi;
int ret = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
BUILD_BUG_ON(32 != sizeof (struct minix_inode));
@@ -265,6 +269,7 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
else if (sbi->s_mount_state & MINIX_ERROR_FS)
printk("MINIX-fs: mounting file system with errors, "
"running fsck is recommended\n");
+ unlock_kernel();
return 0;
out_iput:
@@ -314,6 +319,7 @@ out_bad_sb:
out:
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/namespace.c b/fs/namespace.c
index bdc3cb4..3f95497 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1647,9 +1647,7 @@ static int do_new_mount(struct path *path, char *type, int flags,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- lock_kernel();
mnt = do_kern_mount(type, flags, name, data);
- unlock_kernel();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index cf98da1..a020d86 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -445,10 +445,14 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
#endif
struct ncp_entry_info finfo;
+ lock_kernel();
+
data.wdog_pid = NULL;
server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
- if (!server)
+ if (!server) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = server;
error = -EFAULT;
@@ -695,6 +699,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
if (!sb->s_root)
goto out_no_root;
sb->s_root->d_op = &ncp_root_dentry_operations;
+ unlock_kernel();
return 0;
out_no_root:
@@ -729,6 +734,7 @@ out:
put_pid(data.wdog_pid);
sb->s_fs_info = NULL;
kfree(server);
+ unlock_kernel();
return error;
}
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 90be551..1f97aad 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1877,6 +1877,8 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
options->version <= 6))))
return 0;
+ lock_kernel();
+
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
@@ -2184,6 +2186,7 @@ out:
out_free_fh:
kfree(mntfh);
kfree(data);
+ unlock_kernel();
return error;
out_err_nosb:
@@ -2227,6 +2230,8 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs_xdev_get_sb()\n");
/* create a new volume representation */
@@ -2281,17 +2286,20 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs_xdev_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2475,6 +2483,8 @@ static int nfs4_remote_get_sb(struct file_system_type *fs_type,
};
int error = -ENOMEM;
+ lock_kernel();
+
mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
if (data == NULL || mntfh == NULL)
goto out_free_fh;
@@ -2534,6 +2544,7 @@ out:
security_free_mnt_opts(&data->lsm_opts);
out_free_fh:
kfree(mntfh);
+ unlock_kernel();
return error;
out_free:
@@ -2794,6 +2805,8 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
/* create a new volume representation */
@@ -2847,17 +2860,20 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs4_referral_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2873,6 +2889,8 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
struct vfsmount *root_mnt;
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
export_path = data->mnt_path;
@@ -2890,6 +2908,7 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
out:
dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error,
error != 0 ? " [error]" : "");
+ unlock_kernel();
return error;
}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 5c01fc1..dcaef52 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1347,7 +1347,12 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
#endif
/* last one */ {""}
};
- return simple_fill_super(sb, 0x6e667364, nfsd_files);
+ int ret;
+
+ lock_kernel();
+ ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
+ unlock_kernel();
+ return ret;
}
static int nfsd_get_sb(struct file_system_type *fs_type,
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 644e667..3448ec3 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1059,9 +1059,13 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
struct the_nilfs *nilfs;
int err, need_to_close = 1;
+ lock_kernel();
+
sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type);
- if (IS_ERR(sd.bdev))
+ if (IS_ERR(sd.bdev)) {
+ unlock_kernel();
return PTR_ERR(sd.bdev);
+ }
/*
* To get mount instance using sget() vfs-routine, NILFS needs
@@ -1142,6 +1146,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
if (need_to_close)
close_bdev_exclusive(sd.bdev, flags);
simple_set_mnt(mnt, s);
+ unlock_kernel();
return 0;
failed_unlock:
@@ -1150,6 +1155,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
failed:
close_bdev_exclusive(sd.bdev, flags);
+ unlock_kernel();
return err;
cancel_new:
@@ -1163,6 +1169,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
* We must finish all post-cleaning before this call;
* put_nilfs() needs the block device.
*/
+ unlock_kernel();
return err;
}
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 80b0477..ab09c02 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2723,6 +2723,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
struct inode *tmp_ino;
int blocksize, result;
+ lock_kernel();
+
/*
* We do a pretty difficult piece of bootstrap by reading the
* MFT (and other metadata) from disk into memory. We'll only
@@ -2746,6 +2748,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Allocation of NTFS volume structure "
"failed. Aborting mount...");
lockdep_on();
+ unlock_kernel();
return -ENOMEM;
}
/* Initialize ntfs_volume structure. */
@@ -2933,6 +2936,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
sb->s_export_op = &ntfs_export_ops;
lock_kernel();
lockdep_on();
+ unlock_kernel();
return 0;
}
ntfs_error(sb, "Failed to allocate root directory.");
@@ -3053,6 +3057,7 @@ err_out_now:
kfree(vol);
ntfs_debug("Failed, returning -EINVAL.");
lockdep_on();
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ocfs2/dlm/dlmfs.c b/fs/ocfs2/dlm/dlmfs.c
index 02bf178..58ce813 100644
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlm/dlmfs.c
@@ -528,21 +528,27 @@ static int dlmfs_fill_super(struct super_block * sb,
struct inode * inode;
struct dentry * root;
+ lock_kernel();
+
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = DLMFS_MAGIC;
sb->s_op = &dlmfs_ops;
inode = dlmfs_get_root_inode(sb);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index c0e48ae..fab815f 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -986,6 +986,8 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
char nodestr[8];
struct ocfs2_blockcheck_stats stats;
+ lock_kernel();
+
mlog_entry("%p, %p, %i", sb, data, silent);
if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
@@ -1172,6 +1174,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
atomic_set(&osb->vol_state, VOLUME_DISABLED);
wake_up(&osb->osb_mount_event);
mlog_exit(status);
+ unlock_kernel();
return status;
}
}
@@ -1186,6 +1189,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
ocfs2_orphan_scan_start(osb);
mlog_exit(status);
+ unlock_kernel();
return status;
read_super_error:
@@ -1201,6 +1205,7 @@ read_super_error:
}
mlog_exit(status);
+ unlock_kernel();
return status;
}
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index f3b7c15..ddfbb22 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -416,11 +416,15 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
sector_t start;
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, (char *) data);
sbi = kzalloc(sizeof(struct omfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -525,6 +529,7 @@ out_brelse_bh2:
out_brelse_bh:
brelse(bh);
end:
+ unlock_kernel();
return ret;
}
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index ffcd04f..50dc4be 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -386,6 +386,8 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
struct op_inode_info *oi;
int ret;
+ lock_kernel();
+
s->s_flags |= MS_NOATIME;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
@@ -405,6 +407,7 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
s->s_root = d_alloc_root(root_inode);
if (!s->s_root)
goto out_no_root_dentry;
+ unlock_kernel();
return 0;
out_no_root_dentry:
@@ -412,6 +415,7 @@ out_no_root_dentry:
ret = -ENOMEM;
out_no_root:
printk("openprom_fill_super: get root inode failed\n");
+ unlock_kernel();
return ret;
}
diff --git a/fs/proc/root.c b/fs/proc/root.c
index b080b79..6384680 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -18,6 +18,7 @@
#include <linux/bitops.h>
#include <linux/mount.h>
#include <linux/pid_namespace.h>
+#include <linux/smp_lock.h> /* For lock_kernel() only */
#include "internal.h"
@@ -43,6 +44,8 @@ static int proc_get_sb(struct file_system_type *fs_type,
struct pid_namespace *ns;
struct proc_inode *ei;
+ lock_kernel();
+
if (proc_mnt) {
/* Seed the root directory with a pid so it doesn't need
* to be special in base.c. I would do this earlier but
@@ -60,14 +63,17 @@ static int proc_get_sb(struct file_system_type *fs_type,
ns = current->nsproxy->pid_ns;
sb = sget(fs_type, proc_test_super, proc_set_super, ns);
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
if (!sb->s_root) {
sb->s_flags = flags;
err = proc_fill_super(sb);
if (err) {
deactivate_locked_super(sb);
+ unlock_kernel();
return err;
}
@@ -83,6 +89,7 @@ static int proc_get_sb(struct file_system_type *fs_type,
}
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index d2cd179..18640ce 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -253,9 +253,13 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
struct qnx4_sb_info *qs;
int ret = -EINVAL;
+ lock_kernel();
+
qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
- if (!qs)
+ if (!qs) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = qs;
sb_set_blocksize(s, QNX4_BLOCK_SIZE);
@@ -303,6 +307,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
brelse(bh);
+ unlock_kernel();
return 0;
outi:
@@ -312,6 +317,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
outnobh:
kfree(qs);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index a6090aa..9b3983f 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -35,6 +35,7 @@
#include <linux/sched.h>
#include <linux/parser.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
#include "internal.h"
@@ -220,6 +221,8 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
struct dentry *root;
int err;
+ lock_kernel();
+
save_mount_options(sb, data);
fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL);
@@ -253,11 +256,13 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
goto fail;
}
+ unlock_kernel();
return 0;
fail:
kfree(fsi);
sb->s_fs_info = NULL;
iput(inode);
+ unlock_kernel();
return err;
}
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index f0ad05f..f32bf62 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1608,6 +1608,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
char *qf_names[MAXQUOTAS] = {};
unsigned int qfmt = 0;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
@@ -1852,6 +1854,7 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
init_waitqueue_head(&(sbi->s_wait));
spin_lock_init(&sbi->bitmap_lock);
+ unlock_kernel();
return (0);
error:
@@ -1872,6 +1875,7 @@ error:
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return errval;
}
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index c117fa8..7342617 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -468,6 +468,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
size_t len;
int ret;
+ lock_kernel();
+
#ifdef CONFIG_BLOCK
if (!sb->s_mtd) {
sb_set_blocksize(sb, ROMBSIZE);
@@ -484,8 +486,10 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
/* read the image superblock and check it */
rsb = kmalloc(512, GFP_KERNEL);
- if (!rsb)
+ if (!rsb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = (void *) 512;
ret = romfs_dev_read(sb, 0, rsb, 512);
@@ -535,15 +539,18 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
if (!sb->s_root)
goto error_i;
+ unlock_kernel();
return 0;
error_i:
iput(root);
error:
+ unlock_kernel();
return -EINVAL;
error_rsb_inval:
ret = -EINVAL;
error_rsb:
+ unlock_kernel();
return ret;
}
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 1c4c8f0..c3c9044 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -500,6 +500,8 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
void *mem;
static int warn_count;
+ lock_kernel();
+
if (warn_count < 5) {
warn_count++;
printk(KERN_EMERG "smbfs is deprecated and will be removed"
@@ -615,6 +617,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
smb_new_dentry(sb->s_root);
+ unlock_kernel();
return 0;
out_no_root:
@@ -635,9 +638,11 @@ out_wrong_data:
out_no_data:
printk(KERN_ERR "smb_fill_super: missing data argument\n");
out_fail:
+ unlock_kernel();
return -EINVAL;
out_no_server:
printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 6c197ef..23cea83 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -78,11 +78,14 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
u64 lookup_table_start;
int err;
+ lock_kernel();
+
TRACE("Entered squashfs_fill_superblock\n");
sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL);
if (sb->s_fs_info == NULL) {
ERROR("Failed to allocate squashfs_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
msblk = sb->s_fs_info;
@@ -286,6 +289,7 @@ allocate_root:
TRACE("Leaving squashfs_fill_super\n");
kfree(sblk);
+ unlock_kernel();
return 0;
failed_mount:
@@ -299,12 +303,14 @@ failed_mount:
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
kfree(sblk);
+ unlock_kernel();
return err;
failure:
kfree(msblk->stream.workspace);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 4974995..2e5a870 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include "sysfs.h"
@@ -45,6 +46,8 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = SYSFS_MAGIC;
@@ -58,6 +61,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
mutex_unlock(&sysfs_mutex);
if (!inode) {
pr_debug("sysfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -66,10 +70,12 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
root->d_fsdata = &sysfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/sysv/super.c b/fs/sysv/super.c
index 5a903da..145d949 100644
--- a/fs/sysv/super.c
+++ b/fs/sysv/super.c
@@ -357,7 +357,9 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
struct sysv_sb_info *sbi;
unsigned long blocknr;
int size = 0, i;
-
+
+ lock_kernel();
+
BUILD_BUG_ON(1024 != sizeof (struct xenix_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv4_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv2_super_block));
@@ -365,8 +367,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
BUILD_BUG_ON(64 != sizeof (struct sysv_inode));
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -409,8 +413,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
if (bh && bh1) {
sbi->s_bh1 = bh1;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, size))
+ if (complete_read_super(sb, silent, size)) {
+ unlock_kernel();
return 0;
+ }
}
brelse(bh1);
@@ -419,6 +425,7 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
printk("oldfs: cannot read superblock\n");
failed:
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
Eunknown:
@@ -442,14 +449,18 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
struct v7_super_block *v7sb;
struct sysv_inode *v7i;
+ lock_kernel();
+
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad i-node size");
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -487,13 +498,16 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_bh1 = bh;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, 1))
+ if (complete_read_super(sb, silent, 1)) {
+ unlock_kernel();
return 0;
+ }
failed:
brelse(bh2);
brelse(bh);
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 333e181..04a0fc9 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2029,6 +2029,8 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
struct super_block *sb;
int err;
+ lock_kernel();
+
dbg_gen("name %s, flags %#x", name, flags);
/*
@@ -2040,6 +2042,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
if (IS_ERR(ubi)) {
ubifs_err("cannot open \"%s\", error %d",
name, (int)PTR_ERR(ubi));
+ unlock_kernel();
return PTR_ERR(ubi);
}
ubi_get_volume_info(ubi, &vi);
@@ -2077,12 +2080,14 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
ubi_close_volume(ubi);
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
out_deact:
deactivate_locked_super(sb);
out_close:
ubi_close_volume(ubi);
+ unlock_kernel();
return err;
}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9d1b8c2..fa6f8db 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1866,6 +1866,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
struct kernel_lb_addr rootdir, fileset;
struct udf_sb_info *sbi;
+ lock_kernel();
+
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
uopt.uid = -1;
uopt.gid = -1;
@@ -1874,8 +1876,10 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
uopt.dmode = UDF_INVALID_MODE;
sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -2021,6 +2025,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
goto error_out;
}
sb->s_maxbytes = MAX_LFS_FILESIZE;
+ unlock_kernel();
return 0;
error_out:
@@ -2041,6 +2046,7 @@ error_out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 5faed79..31ad198 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -646,6 +646,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
unsigned maxsymlen;
int ret = -EINVAL;
+ lock_kernel();
+
uspi = NULL;
ubh = NULL;
flags = 0;
@@ -1107,6 +1109,7 @@ magic_found:
goto failed;
UFSD("EXIT\n");
+ unlock_kernel();
return 0;
dalloc_failed:
@@ -1118,10 +1121,12 @@ failed:
kfree(sbi);
sb->s_fs_info = NULL;
UFSD("EXIT (FAILED)\n");
+ unlock_kernel();
return ret;
failed_nomem:
UFSD("EXIT (NOMEM)\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 18a4b8e..7426166 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1412,6 +1412,8 @@ xfs_fs_fill_super(
int flags = 0, error = ENOMEM;
char *mtpt = NULL;
+ lock_kernel();
+
mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
if (!mp)
goto out;
@@ -1506,6 +1508,7 @@ xfs_fs_fill_super(
kfree(mtpt);
xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
+ unlock_kernel();
return 0;
out_filestream_unmount:
@@ -1522,6 +1525,7 @@ xfs_fs_fill_super(
kfree(mtpt);
kfree(mp);
out:
+ unlock_kernel();
return -error;
fail_vnrele:
--
1.6.4.2
______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
^ permalink raw reply related [flat|nested] 70+ messages in thread* [uml-devel] [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
@ 2009-11-02 10:04 ` Jan Blunck
0 siblings, 0 replies; 70+ messages in thread
From: Jan Blunck @ 2009-11-02 10:04 UTC (permalink / raw)
To: linux-fsdevel
Cc: Latchesar Ionkov, Andreas Dilger, Anders Larsen, J. Bruce Fields,
Christoph Hellwig, Alessio Igor Bogani, Arte m Bityutskiy,
James Morris, Petr Vandrovec, KOSAKI Motohiro, Abhishek Kulkarni,
Matthew Wilcox, Eric Van Hensbergen, Al Viro, Matt Mackall,
Thomas Gleixner, Dustin Kirkland, Tigran A. Aivazian,
linux-kernel, Sukadev Bhattiprolu, Chuck Lever, Tejun Heo,
Serge Hallyn, Csaba Henk, Wu Fengguang, Roman Zippel,
Eric Sesterhenn, Coly Li, co, Clemens Ladisch, KONISHI Ryusuke,
Yan Zheng, Bernd Schmidt, Eric Sandeen, codalist, Marcin Slusarz,
Wolfgang Illmeyer, Phillip Lougher, Mark Fasheh, reiserfs-devel,
osd-dev, Sage Weil, Andrew Morton, OGAWA Hirofumi, autofs,
Theodore Ts'o, linux-ntfs-dev, David VomLehn, Benny Halevy,
Tyler Hicks, Adrian Hunter, Qinghuang Feng, users,
Trond Myklebust, linux-mtd, Jens Axboe, Dave Kleikamp, linux-afs,
Ian Kent, Nick Piggin, Jeff Layton, Miklos Szeredi,
Sergey S. Kostyliov, Joel Becker, Alex Elder, Jiro SEKIBA,
linux-ext4, linux-cifs-client, Alexey Dobriyan, Mel Gorman,
Dave Chinner, Jeff Dike, ecryptfs-devel, Felix Blyakher, xfs,
xfs-masters, Pekka Enberg, Chris Mason, Jan Harkes, linux-nfs,
Greg Kroah-Hartman, Roel Kluin, da, Steve French, Julia Lawall,
ocfs2-devel, Niv Sardi, jfs-discussion, Jan Kara, Neil Brown,
Jeff Mahoney, Bob Copeland, William Irwin, David Howells,
Anton Altaparmakov, Mikulas Patocka, samba-technical, Jan Blunck,
Eric W. Biederman, cluster-devel, Jeff Moyer, v9fs-developer,
Sunil Mushran, Evgeniy Dushistov, user-mode-linux-devel,
fuse-devel, Masayuki Hamaguchi, user-mode-linux-user,
Steven Whitehouse, Alan Cox, Denis Karpov, Ron Minnich,
David Woodhouse, linux-karma-devel, linux-btrfs
I've read through all the code formerly covered by the BKL inside
do_kern_mount() and have satisfied myself that it doesn't need the BKL
any more.
do_kern_mount() is already called without the BKL when mounting the rootfs
and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called
from various places without BKL: simple_pin_fs(), nfs_do_clone_mount()
through nfs_follow_mountpoint(), afs_mntpt_do_automount() through
afs_mntpt_follow_link(). Both later functions are actually the filesystems
follow_link inode operation. vfs_kern_mount() is calling the specified
get_sb function and lets the filesystem do its job by calling the given
fill_super function.
Therefore I think it is safe to push down the BKL from the VFS to the
low-level filesystems get_sb/fill_super operation.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Matthew Wilcox <matthew@wil.cx>
---
fs/9p/vfs_super.c | 9 ++++++++-
fs/adfs/super.c | 8 +++++++-
fs/affs/super.c | 9 ++++++++-
fs/afs/super.c | 5 +++++
fs/autofs4/inode.c | 4 ++++
fs/befs/linuxvfs.c | 4 ++++
fs/bfs/inode.c | 9 ++++++++-
fs/binfmt_misc.c | 6 +++++-
fs/btrfs/super.c | 8 +++++++-
fs/cifs/cifsfs.c | 12 ++++++++++--
fs/coda/inode.c | 8 +++++++-
fs/configfs/mount.c | 5 +++++
fs/cramfs/inode.c | 8 +++++++-
fs/devpts/inode.c | 13 +++++++++++--
fs/ecryptfs/main.c | 3 +++
fs/efs/super.c | 10 ++++++++--
fs/exofs/super.c | 7 ++++++-
fs/ext2/super.c | 10 ++++++++--
fs/ext3/super.c | 9 ++++++++-
fs/ext4/super.c | 9 ++++++---
fs/fat/namei_msdos.c | 6 +++++-
fs/fat/namei_vfat.c | 6 +++++-
fs/freevxfs/vxfs_super.c | 7 ++++++-
fs/fuse/control.c | 9 ++++++++-
fs/fuse/inode.c | 5 +++++
fs/gfs2/ops_fstype.c | 9 +++++++++
fs/hfs/super.c | 8 +++++++-
fs/hfsplus/super.c | 8 +++++++-
fs/hostfs/hostfs_kern.c | 4 ++++
fs/hpfs/super.c | 8 +++++++-
fs/hppfs/hppfs.c | 4 ++++
fs/hugetlbfs/inode.c | 12 ++++++++++--
fs/isofs/inode.c | 8 +++++++-
fs/jffs2/super.c | 11 +++++++++--
fs/jfs/super.c | 14 ++++++++++++--
fs/libfs.c | 10 +++++++++-
fs/minix/inode.c | 8 +++++++-
fs/namespace.c | 2 --
fs/ncpfs/inode.c | 8 +++++++-
fs/nfs/super.c | 19 +++++++++++++++++++
fs/nfsd/nfsctl.c | 7 ++++++-
fs/nilfs2/super.c | 9 ++++++++-
fs/ntfs/super.c | 5 +++++
fs/ocfs2/dlm/dlmfs.c | 8 +++++++-
fs/ocfs2/super.c | 5 +++++
fs/omfs/inode.c | 7 ++++++-
fs/openpromfs/inode.c | 4 ++++
fs/proc/root.c | 9 ++++++++-
fs/qnx4/inode.c | 8 +++++++-
fs/ramfs/inode.c | 5 +++++
fs/reiserfs/super.c | 4 ++++
fs/romfs/super.c | 9 ++++++++-
fs/smbfs/inode.c | 5 +++++
fs/squashfs/super.c | 6 ++++++
fs/sysfs/mount.c | 6 ++++++
fs/sysv/super.c | 24 +++++++++++++++++++-----
fs/ubifs/super.c | 5 +++++
fs/udf/super.c | 8 +++++++-
fs/ufs/super.c | 5 +++++
fs/xfs/linux-2.6/xfs_super.c | 4 ++++
60 files changed, 412 insertions(+), 53 deletions(-)
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 14a8644..4156a0c 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -106,11 +106,15 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
struct p9_fid *fid;
int retval = 0;
+ lock_kernel();
+
P9_DPRINTK(P9_DEBUG_VFS, " \n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
- if (!v9ses)
+ if (!v9ses) {
+ unlock_kernel();
return -ENOMEM;
+ }
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
@@ -155,6 +159,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
free_stat:
@@ -167,12 +172,14 @@ clunk_fid:
close_session:
v9fs_session_close(v9ses);
kfree(v9ses);
+ unlock_kernel();
return retval;
release_sb:
p9stat_free(st);
kfree(st);
deactivate_locked_super(sb);
+ unlock_kernel();
return retval;
}
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 6910a98..e94f111 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -351,11 +351,15 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
struct adfs_sb_info *asb;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_NODIRATIME;
asb = kzalloc(sizeof(*asb), GFP_KERNEL);
- if (!asb)
+ if (!asb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = asb;
/* set default options */
@@ -473,6 +477,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
goto error;
} else
sb->s_root->d_op = &adfs_dentry_operations;
+ unlock_kernel();
return 0;
error_free_bh:
@@ -480,6 +485,7 @@ error_free_bh:
error:
sb->s_fs_info = NULL;
kfree(asb);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 104fdcb..135f0d3 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -298,6 +298,8 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
u8 sig[4];
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, data);
pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
@@ -307,8 +309,10 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_flags |= MS_NODIRATIME;
sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
mutex_init(&sbi->s_bmlock);
@@ -316,6 +320,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
&blocksize,&sbi->s_prefix,
sbi->s_volume, &mount_flags)) {
printk(KERN_ERR "AFFS: Error parsing options\n");
+ unlock_kernel();
return -EINVAL;
}
/* N.B. after this point s_prefix must be released */
@@ -486,6 +491,7 @@ got_root:
sb->s_root->d_op = &affs_dentry_operations;
pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
+ unlock_kernel();
return 0;
/*
@@ -500,6 +506,7 @@ out_error_noinode:
kfree(sbi->s_prefix);
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/afs/super.c b/fs/afs/super.c
index e1ea1c2..108fb3e 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -294,12 +294,15 @@ static int afs_fill_super(struct super_block *sb, void *data)
struct inode *inode = NULL;
int ret;
+ lock_kernel();
+
_enter("");
/* allocate a superblock info record */
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
if (!as) {
_leave(" = -ENOMEM");
+ unlock_kernel();
return -ENOMEM;
}
@@ -329,6 +332,7 @@ static int afs_fill_super(struct super_block *sb, void *data)
sb->s_root = root;
_leave(" = 0");
+ unlock_kernel();
return 0;
error_inode:
@@ -342,6 +346,7 @@ error:
sb->s_fs_info = NULL;
_leave(" = %d", ret);
+ unlock_kernel();
return ret;
}
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 69c8142..3adaba9 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -323,6 +323,8 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
struct autofs_sb_info *sbi;
struct autofs_info *ino;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto fail_unlock;
@@ -418,6 +420,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
* Success! Install the root dentry now to indicate completion.
*/
s->s_root = root;
+ unlock_kernel();
return 0;
/*
@@ -439,6 +442,7 @@ fail_free:
kfree(sbi);
s->s_fs_info = NULL;
fail_unlock:
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 33baf27..f2aa193 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -759,6 +759,8 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
const unsigned long sb_block = 0;
const off_t x86_sb_off = 512;
+ lock_kernel();
+
save_mount_options(sb, data);
sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
@@ -867,6 +869,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
befs_sb->nls = load_nls_default();
}
+ unlock_kernel();
return 0;
/*****************/
unacquire_bh:
@@ -877,6 +880,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
unacquire_none:
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 6f60336..4bff506 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -356,9 +356,13 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
long ret = -EINVAL;
unsigned long i_sblock, i_eblock, i_eoff, s_size;
+ lock_kernel();
+
info = kzalloc(sizeof(*info), GFP_KERNEL);
- if (!info)
+ if (!info) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = info;
sb_set_blocksize(s, BFS_BSIZE);
@@ -463,6 +467,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
kfree(info->si_imap);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return -EIO;
}
@@ -484,12 +489,14 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
}
dump_imap("read_super", s);
mutex_init(&info->bfs_lock);
+ unlock_kernel();
return 0;
out:
brelse(bh);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c4e8353..ca0e22d 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -695,9 +695,13 @@ static int bm_fill_super(struct super_block * sb, void * data, int silent)
[3] = {"register", &bm_register_operations, S_IWUSR},
/* last one */ {""}
};
- int err = simple_fill_super(sb, 0x42494e4d, bm_files);
+ int err;
+
+ lock_kernel();
+ err = simple_fill_super(sb, 0x42494e4d, bm_files);
if (!err)
sb->s_op = &s_ops;
+ unlock_kernel();
return err;
}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 752a546..e5cd2cf 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -480,13 +480,17 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
fmode_t mode = FMODE_READ;
int error = 0;
+ lock_kernel();
+
if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
error = btrfs_parse_early_options(data, mode, fs_type,
&subvol_name, &fs_devices);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
error = btrfs_scan_one_device(dev_name, mode, fs_type, &fs_devices);
if (error)
@@ -555,6 +559,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
mnt->mnt_root = root;
kfree(subvol_name);
+ unlock_kernel();
return 0;
error_s:
@@ -563,6 +568,7 @@ error_close_devices:
btrfs_close_devices(fs_devices);
error_free_subvol_name:
kfree(subvol_name);
+ unlock_kernel();
return error;
}
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 9a5e4f5..09ccb9d 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -596,22 +596,30 @@ cifs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
int rc;
- struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
+ struct super_block *sb;
+
+ lock_kernel();
+
+ sb = sget(fs_type, NULL, set_anon_super, NULL);
cFYI(1, ("Devname: %s flags: %d ", dev_name, flags));
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
sb->s_flags = flags;
rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
if (rc) {
deactivate_locked_super(sb);
+ unlock_kernel();
return rc;
}
sb->s_flags |= MS_ACTIVE;
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 830f51a..d081fc5 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -147,6 +147,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
int error;
int idx;
+ lock_kernel();
+
idx = get_device_index((struct coda_mount_data *) data);
/* Ignore errors in data, for backward compatibility */
@@ -158,11 +160,13 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
vc = &coda_comms[idx];
if (!vc->vc_inuse) {
printk("coda_read_super: No pseudo device\n");
+ unlock_kernel();
return -EINVAL;
}
if ( vc->vc_sb ) {
printk("coda_read_super: Device already mounted\n");
+ unlock_kernel();
return -EBUSY;
}
@@ -196,7 +200,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root = d_alloc_root(root);
if (!sb->s_root)
goto error;
- return 0;
+ unlock_kernel();
+ return 0;
error:
if (root)
@@ -204,6 +209,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
if (vc)
vc->vc_sb = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 8421cea..5b2e06e 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -71,6 +71,8 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = CONFIGFS_MAGIC;
@@ -87,6 +89,7 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
inc_nlink(inode);
} else {
pr_debug("configfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -94,12 +97,14 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
config_group_init(&configfs_root_group);
configfs_root_group.cg_item.ci_dentry = root;
root->d_fsdata = &configfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index dd3634e..13e696a 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -227,11 +227,15 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
struct cramfs_sb_info *sbi;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_RDONLY;
sbi = kzalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* Invalidate the read buffers on mount: think disk change.. */
@@ -308,10 +312,12 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
iput(root);
goto out;
}
+ unlock_kernel();
return 0;
out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index d5f8c96..e206eef 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -24,6 +24,7 @@
#include <linux/parser.h>
#include <linux/fsnotify.h>
#include <linux/seq_file.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define DEVPTS_DEFAULT_MODE 0600
/*
@@ -363,17 +364,23 @@ static int devpts_get_sb(struct file_system_type *fs_type,
struct pts_mount_opts opts;
struct super_block *s;
+ lock_kernel();
+
error = parse_mount_options(data, PARSE_MOUNT, &opts);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
if (opts.newinstance)
s = sget(fs_type, NULL, set_anon_super, NULL);
else
s = sget(fs_type, compare_init_pts_sb, set_anon_super, NULL);
- if (IS_ERR(s))
+ if (IS_ERR(s)) {
+ unlock_kernel();
return PTR_ERR(s);
+ }
if (!s->s_root) {
s->s_flags = flags;
@@ -391,6 +398,7 @@ static int devpts_get_sb(struct file_system_type *fs_type,
if (error)
goto out_dput;
+ unlock_kernel();
return 0;
out_dput:
@@ -398,6 +406,7 @@ out_dput:
out_undo_sget:
deactivate_locked_super(s);
+ unlock_kernel();
return error;
}
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index c6ac85d..fdc7bda 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -600,6 +600,8 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
int rc;
struct super_block *sb;
+ lock_kernel();
+
rc = get_sb_nodev(fs_type, flags, raw_data, ecryptfs_fill_super, mnt);
if (rc < 0) {
printk(KERN_ERR "Getting sb failed; rc = [%d]\n", rc);
@@ -621,6 +623,7 @@ out_abort:
dput(sb->s_root); /* aka mnt->mnt_root, as set by get_sb_nodev() */
deactivate_locked_super(sb);
out:
+ unlock_kernel();
return rc;
}
diff --git a/fs/efs/super.c b/fs/efs/super.c
index f049428..0981141 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -249,9 +249,13 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
struct inode *root;
int ret = -EINVAL;
- sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
- if (!sb)
+ lock_kernel();
+
+ sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
+ if (!sb) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sb;
s->s_magic = EFS_SUPER_MAGIC;
@@ -319,12 +323,14 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
goto out_no_fs;
}
+ unlock_kernel();
return 0;
out_no_fs_ul:
out_no_fs:
s->s_fs_info = NULL;
kfree(sb);
+ unlock_kernel();
return ret;
}
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 9f500de..ea045b8 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -297,9 +297,13 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
struct osd_obj_id obj;
int ret;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* use mount options to fill superblock */
@@ -399,6 +403,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
out:
if (or)
osd_end_request(or);
+ unlock_kernel();
return ret;
free_sbi:
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 1a9ffee..5af1775 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -745,15 +745,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
+ err = -ENOMEM;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
- return -ENOMEM;
+ goto failed_unlock;
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
- return -ENOMEM;
+ goto failed_unlock;
}
sb->s_fs_info = sbi;
sbi->s_sb_block = sb_block;
@@ -1063,6 +1066,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
ext2_warning(sb, __func__,
"mounting ext3 filesystem as ext2");
ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+ unlock_kernel();
return 0;
cantfind_ext2:
@@ -1086,6 +1090,8 @@ failed_sbi:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
+failed_unlock:
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 7a520a8..38261a5 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1568,14 +1568,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -1992,6 +1997,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
"writeback");
lock_kernel();
+ unlock_kernel();
return 0;
cantfind_ext3:
@@ -2022,6 +2028,7 @@ out_fail:
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
lock_kernel();
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 312211e..9db81d2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2328,14 +2328,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
int err;
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -2913,7 +2918,6 @@ no_journal:
ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr);
- lock_kernel();
return 0;
cantfind_ext4:
@@ -2959,7 +2963,6 @@ out_fail:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
- lock_kernel();
return ret;
}
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index bbc94ae..31dd072 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -662,12 +662,16 @@ static int msdos_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
sb->s_flags |= MS_NOATIME;
sb->s_root->d_op = &msdos_dentry_operations;
+ unlock_kernel();
return 0;
}
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index f565f24..12961b8 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -1044,15 +1044,19 @@ static int vfat_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &vfat_dir_inode_operations, 1);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
if (MSDOS_SB(sb)->options.name_check != 's')
sb->s_root->d_op = &vfat_ci_dentry_ops;
else
sb->s_root->d_op = &vfat_dentry_ops;
+ unlock_kernel();
return 0;
}
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index 1e8af93..b8b7821 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -148,7 +148,7 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data)
* The superblock on success, else %NULL.
*
* Locking:
- * We are under the bkl and @sbp->s_lock.
+ * We are under @sbp->s_lock.
*/
static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
{
@@ -159,11 +159,14 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
struct inode *root;
int ret = -EINVAL;
+ lock_kernel();
+
sbp->s_flags |= MS_RDONLY;
infp = kzalloc(sizeof(*infp), GFP_KERNEL);
if (!infp) {
printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -236,6 +239,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
goto out_free_ilist;
}
+ unlock_kernel();
return 0;
out_free_ilist:
@@ -245,6 +249,7 @@ out_free_ilist:
out:
brelse(bp);
kfree(infp);
+ unlock_kernel();
return ret;
}
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 3773fd6..8d769f7 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -10,6 +10,7 @@
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define FUSE_CTL_SUPER_MAGIC 0x65735543
@@ -297,9 +298,13 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
struct fuse_conn *fc;
int err;
+ lock_kernel();
+
err = simple_fill_super(sb, FUSE_CTL_SUPER_MAGIC, &empty_descr);
- if (err)
+ if (err) {
+ unlock_kernel();
return err;
+ }
mutex_lock(&fuse_mutex);
BUG_ON(fuse_control_sb);
@@ -309,10 +314,12 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
if (err) {
fuse_control_sb = NULL;
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return err;
}
}
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return 0;
}
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1a822ce..5690279 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -20,6 +20,7 @@
#include <linux/random.h>
#include <linux/sched.h>
#include <linux/exportfs.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
MODULE_DESCRIPTION("Filesystem in Userspace");
@@ -919,6 +920,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
int err;
int is_bdev = sb->s_bdev != NULL;
+ lock_kernel();
+
err = -EINVAL;
if (sb->s_flags & MS_MANDLOCK)
goto err;
@@ -1022,6 +1025,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
fuse_send_init(fc, init_req);
+ unlock_kernel();
return 0;
err_unlock:
@@ -1036,6 +1040,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
err_fput:
fput(file);
err:
+ unlock_kernel();
return err;
}
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 52fb6c0..76415fe 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1120,9 +1120,12 @@ static int fill_super(struct super_block *sb, void *data, int silent)
struct gfs2_holder mount_gh;
int error;
+ lock_kernel();
+
sdp = init_sbd(sb);
if (!sdp) {
printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -1211,6 +1214,7 @@ static int fill_super(struct super_block *sb, void *data, int silent)
gfs2_glock_dq_uninit(&mount_gh);
gfs2_online_uevent(sdp);
+ unlock_kernel();
return 0;
fail_threads:
@@ -1240,6 +1244,7 @@ fail:
gfs2_delete_debugfs_file(sdp);
kfree(sdp);
sb->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
@@ -1268,10 +1273,12 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
struct path path;
int error;
+ lock_kernel();
error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
if (error) {
printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
dev_name, error);
+ unlock_kernel();
return error;
}
s = sget(&gfs2_fs_type, test_meta_super, set_meta_super,
@@ -1279,11 +1286,13 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
path_put(&path);
if (IS_ERR(s)) {
printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
+ unlock_kernel();
return PTR_ERR(s);
}
sdp = s->s_fs_info;
mnt->mnt_sb = s;
mnt->mnt_root = dget(sdp->sd_master_dir);
+ unlock_kernel();
return 0;
}
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index f7fcbe4..a2e19ff 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -381,9 +381,13 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root_inode;
int res;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -429,6 +433,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root->d_op = &hfs_dentry_operations;
/* everything's okay */
+ unlock_kernel();
return 0;
bail_iput:
@@ -437,6 +442,7 @@ bail_no_root:
printk(KERN_ERR "hfs: get root inode failed.\n");
bail:
hfs_mdb_put(sb);
+ unlock_kernel();
return res;
}
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 43022f3..824f57a 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -312,9 +312,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
struct nls_table *nls = NULL;
int err = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -459,11 +463,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
out:
unload_nls(sbi->nls);
sbi->nls = nls;
+ unlock_kernel();
return 0;
cleanup:
hfsplus_put_super(sb);
unload_nls(nls);
+ unlock_kernel();
return err;
}
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 032604e..5eb2c26 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -968,6 +968,8 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
char *host_root_path, *req_root = d;
int err;
+ lock_kernel();
+
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = HOSTFS_SUPER_MAGIC;
@@ -1016,6 +1018,7 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
goto out;
}
+ unlock_kernel();
return 0;
out_put:
@@ -1023,6 +1026,7 @@ out_put:
out_free:
kfree(host_root_path);
out:
+ unlock_kernel();
return err;
}
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2feaa0..a7b348a 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -477,11 +477,15 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
int o;
+ lock_kernel();
+
save_mount_options(s, options);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
sbi->sb_bmp_dir = NULL;
@@ -666,6 +670,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
root->i_blocks = 5;
hpfs_brelse4(&qbh);
}
+ unlock_kernel();
return 0;
bail4: brelse(bh2);
@@ -677,6 +682,7 @@ bail0:
kfree(sbi->sb_cp_table);
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index a5089a6..6263973 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -712,6 +712,8 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
struct vfsmount *proc_mnt;
int err = -ENOENT;
+ lock_kernel();
+
proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
if (IS_ERR(proc_mnt))
goto out;
@@ -731,6 +733,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
if (!sb->s_root)
goto out_iput;
+ unlock_kernel();
return 0;
out_iput:
@@ -738,6 +741,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
out_mntput:
mntput(proc_mnt);
out:
+ unlock_kernel();
return(err);
}
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 87a1258..53be2b9 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -32,6 +32,7 @@
#include <linux/security.h>
#include <linux/ima.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -824,6 +825,7 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
struct hugetlbfs_config config;
struct hugetlbfs_sb_info *sbinfo;
+ lock_kernel();
save_mount_options(sb, data);
config.nr_blocks = -1; /* No limit on size by default */
@@ -833,12 +835,16 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
config.mode = 0755;
config.hstate = &default_hstate;
ret = hugetlbfs_parse_options(data, &config);
- if (ret)
+ if (ret) {
+ unlock_kernel();
return ret;
+ }
sbinfo = kmalloc(sizeof(struct hugetlbfs_sb_info), GFP_KERNEL);
- if (!sbinfo)
+ if (!sbinfo) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbinfo;
sbinfo->hstate = config.hstate;
spin_lock_init(&sbinfo->stat_lock);
@@ -863,9 +869,11 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
goto out_free;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
out_free:
kfree(sbinfo);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 6b4dcd4..7c501d5 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -571,11 +571,15 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
int table, error = -EINVAL;
unsigned int vol_desc_start;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
if (!parse_options((char *)data, &opt))
@@ -895,6 +899,7 @@ root_found:
kfree(opt.iocharset);
+ unlock_kernel();
return 0;
/*
@@ -934,6 +939,7 @@ out_freesbi:
kfree(opt.iocharset);
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 9a80e8e..622bd51 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -148,14 +148,19 @@ static const struct super_operations jffs2_super_operations =
static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
{
struct jffs2_sb_info *c;
+ int ret;
+
+ lock_kernel();
D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():"
" New superblock for device %d (\"%s\")\n",
sb->s_mtd->index, sb->s_mtd->name));
c = kzalloc(sizeof(*c), GFP_KERNEL);
- if (!c)
+ if (!c) {
+ unlock_kernel();
return -ENOMEM;
+ }
c->mtd = sb->s_mtd;
c->os_priv = sb;
@@ -177,7 +182,9 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
#endif
- return jffs2_do_fill_super(sb, data, silent);
+ ret = jffs2_do_fill_super(sb, data, silent);
+ unlock_kernel();
+ return ret;
}
static int jffs2_get_sb(struct file_system_type *fs_type,
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 2234c73..329d7b6 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -425,14 +425,20 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
s64 newLVSize = 0;
int flag, ret = -EINVAL;
+ lock_kernel();
+
jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
- if (!new_valid_dev(sb->s_bdev->bd_dev))
+ if (!new_valid_dev(sb->s_bdev->bd_dev)) {
+ unlock_kernel();
return -EOVERFLOW;
+ }
sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
sbi->sb = sb;
sbi->uid = sbi->gid = sbi->umask = -1;
@@ -442,6 +448,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
sbi->flag = flag;
@@ -452,6 +459,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (newLVSize) {
printk(KERN_ERR "resize option for remount only\n");
+ unlock_kernel();
return -EINVAL;
}
@@ -527,6 +535,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
#endif
sb->s_time_gran = 1;
+ unlock_kernel();
return 0;
out_no_root:
@@ -548,6 +557,7 @@ out_kfree:
if (sbi->nls_tab)
unload_nls(sbi->nls_tab);
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/libfs.c b/fs/libfs.c
index 219576c..3484040 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -11,6 +11,7 @@
#include <linux/exportfs.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -422,6 +423,8 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
struct dentry *dentry;
int i;
+ lock_kernel();
+
s->s_blocksize = PAGE_CACHE_SIZE;
s->s_blocksize_bits = PAGE_CACHE_SHIFT;
s->s_magic = magic;
@@ -429,8 +432,10 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
s->s_time_gran = 1;
inode = new_inode(s);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
/*
* because the root inode is 1, the files array must not contain an
* entry at index 1
@@ -444,6 +449,7 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
for (i = 0; !files->name || files->name[0]; i++, files++) {
@@ -469,10 +475,12 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
d_add(dentry, inode);
}
s->s_root = root;
+ unlock_kernel();
return 0;
out:
d_genocide(root);
dput(root);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 74ea82d..b8aa0a6 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -147,9 +147,13 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
struct minix_sb_info *sbi;
int ret = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
BUILD_BUG_ON(32 != sizeof (struct minix_inode));
@@ -265,6 +269,7 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
else if (sbi->s_mount_state & MINIX_ERROR_FS)
printk("MINIX-fs: mounting file system with errors, "
"running fsck is recommended\n");
+ unlock_kernel();
return 0;
out_iput:
@@ -314,6 +319,7 @@ out_bad_sb:
out:
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/namespace.c b/fs/namespace.c
index bdc3cb4..3f95497 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1647,9 +1647,7 @@ static int do_new_mount(struct path *path, char *type, int flags,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- lock_kernel();
mnt = do_kern_mount(type, flags, name, data);
- unlock_kernel();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index cf98da1..a020d86 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -445,10 +445,14 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
#endif
struct ncp_entry_info finfo;
+ lock_kernel();
+
data.wdog_pid = NULL;
server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
- if (!server)
+ if (!server) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = server;
error = -EFAULT;
@@ -695,6 +699,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
if (!sb->s_root)
goto out_no_root;
sb->s_root->d_op = &ncp_root_dentry_operations;
+ unlock_kernel();
return 0;
out_no_root:
@@ -729,6 +734,7 @@ out:
put_pid(data.wdog_pid);
sb->s_fs_info = NULL;
kfree(server);
+ unlock_kernel();
return error;
}
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 90be551..1f97aad 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1877,6 +1877,8 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
options->version <= 6))))
return 0;
+ lock_kernel();
+
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
@@ -2184,6 +2186,7 @@ out:
out_free_fh:
kfree(mntfh);
kfree(data);
+ unlock_kernel();
return error;
out_err_nosb:
@@ -2227,6 +2230,8 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs_xdev_get_sb()\n");
/* create a new volume representation */
@@ -2281,17 +2286,20 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs_xdev_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2475,6 +2483,8 @@ static int nfs4_remote_get_sb(struct file_system_type *fs_type,
};
int error = -ENOMEM;
+ lock_kernel();
+
mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
if (data == NULL || mntfh == NULL)
goto out_free_fh;
@@ -2534,6 +2544,7 @@ out:
security_free_mnt_opts(&data->lsm_opts);
out_free_fh:
kfree(mntfh);
+ unlock_kernel();
return error;
out_free:
@@ -2794,6 +2805,8 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
/* create a new volume representation */
@@ -2847,17 +2860,20 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs4_referral_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2873,6 +2889,8 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
struct vfsmount *root_mnt;
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
export_path = data->mnt_path;
@@ -2890,6 +2908,7 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
out:
dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error,
error != 0 ? " [error]" : "");
+ unlock_kernel();
return error;
}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 5c01fc1..dcaef52 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1347,7 +1347,12 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
#endif
/* last one */ {""}
};
- return simple_fill_super(sb, 0x6e667364, nfsd_files);
+ int ret;
+
+ lock_kernel();
+ ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
+ unlock_kernel();
+ return ret;
}
static int nfsd_get_sb(struct file_system_type *fs_type,
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 644e667..3448ec3 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1059,9 +1059,13 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
struct the_nilfs *nilfs;
int err, need_to_close = 1;
+ lock_kernel();
+
sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type);
- if (IS_ERR(sd.bdev))
+ if (IS_ERR(sd.bdev)) {
+ unlock_kernel();
return PTR_ERR(sd.bdev);
+ }
/*
* To get mount instance using sget() vfs-routine, NILFS needs
@@ -1142,6 +1146,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
if (need_to_close)
close_bdev_exclusive(sd.bdev, flags);
simple_set_mnt(mnt, s);
+ unlock_kernel();
return 0;
failed_unlock:
@@ -1150,6 +1155,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
failed:
close_bdev_exclusive(sd.bdev, flags);
+ unlock_kernel();
return err;
cancel_new:
@@ -1163,6 +1169,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
* We must finish all post-cleaning before this call;
* put_nilfs() needs the block device.
*/
+ unlock_kernel();
return err;
}
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 80b0477..ab09c02 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2723,6 +2723,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
struct inode *tmp_ino;
int blocksize, result;
+ lock_kernel();
+
/*
* We do a pretty difficult piece of bootstrap by reading the
* MFT (and other metadata) from disk into memory. We'll only
@@ -2746,6 +2748,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Allocation of NTFS volume structure "
"failed. Aborting mount...");
lockdep_on();
+ unlock_kernel();
return -ENOMEM;
}
/* Initialize ntfs_volume structure. */
@@ -2933,6 +2936,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
sb->s_export_op = &ntfs_export_ops;
lock_kernel();
lockdep_on();
+ unlock_kernel();
return 0;
}
ntfs_error(sb, "Failed to allocate root directory.");
@@ -3053,6 +3057,7 @@ err_out_now:
kfree(vol);
ntfs_debug("Failed, returning -EINVAL.");
lockdep_on();
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ocfs2/dlm/dlmfs.c b/fs/ocfs2/dlm/dlmfs.c
index 02bf178..58ce813 100644
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlm/dlmfs.c
@@ -528,21 +528,27 @@ static int dlmfs_fill_super(struct super_block * sb,
struct inode * inode;
struct dentry * root;
+ lock_kernel();
+
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = DLMFS_MAGIC;
sb->s_op = &dlmfs_ops;
inode = dlmfs_get_root_inode(sb);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index c0e48ae..fab815f 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -986,6 +986,8 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
char nodestr[8];
struct ocfs2_blockcheck_stats stats;
+ lock_kernel();
+
mlog_entry("%p, %p, %i", sb, data, silent);
if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
@@ -1172,6 +1174,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
atomic_set(&osb->vol_state, VOLUME_DISABLED);
wake_up(&osb->osb_mount_event);
mlog_exit(status);
+ unlock_kernel();
return status;
}
}
@@ -1186,6 +1189,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
ocfs2_orphan_scan_start(osb);
mlog_exit(status);
+ unlock_kernel();
return status;
read_super_error:
@@ -1201,6 +1205,7 @@ read_super_error:
}
mlog_exit(status);
+ unlock_kernel();
return status;
}
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index f3b7c15..ddfbb22 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -416,11 +416,15 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
sector_t start;
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, (char *) data);
sbi = kzalloc(sizeof(struct omfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -525,6 +529,7 @@ out_brelse_bh2:
out_brelse_bh:
brelse(bh);
end:
+ unlock_kernel();
return ret;
}
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index ffcd04f..50dc4be 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -386,6 +386,8 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
struct op_inode_info *oi;
int ret;
+ lock_kernel();
+
s->s_flags |= MS_NOATIME;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
@@ -405,6 +407,7 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
s->s_root = d_alloc_root(root_inode);
if (!s->s_root)
goto out_no_root_dentry;
+ unlock_kernel();
return 0;
out_no_root_dentry:
@@ -412,6 +415,7 @@ out_no_root_dentry:
ret = -ENOMEM;
out_no_root:
printk("openprom_fill_super: get root inode failed\n");
+ unlock_kernel();
return ret;
}
diff --git a/fs/proc/root.c b/fs/proc/root.c
index b080b79..6384680 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -18,6 +18,7 @@
#include <linux/bitops.h>
#include <linux/mount.h>
#include <linux/pid_namespace.h>
+#include <linux/smp_lock.h> /* For lock_kernel() only */
#include "internal.h"
@@ -43,6 +44,8 @@ static int proc_get_sb(struct file_system_type *fs_type,
struct pid_namespace *ns;
struct proc_inode *ei;
+ lock_kernel();
+
if (proc_mnt) {
/* Seed the root directory with a pid so it doesn't need
* to be special in base.c. I would do this earlier but
@@ -60,14 +63,17 @@ static int proc_get_sb(struct file_system_type *fs_type,
ns = current->nsproxy->pid_ns;
sb = sget(fs_type, proc_test_super, proc_set_super, ns);
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
if (!sb->s_root) {
sb->s_flags = flags;
err = proc_fill_super(sb);
if (err) {
deactivate_locked_super(sb);
+ unlock_kernel();
return err;
}
@@ -83,6 +89,7 @@ static int proc_get_sb(struct file_system_type *fs_type,
}
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index d2cd179..18640ce 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -253,9 +253,13 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
struct qnx4_sb_info *qs;
int ret = -EINVAL;
+ lock_kernel();
+
qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
- if (!qs)
+ if (!qs) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = qs;
sb_set_blocksize(s, QNX4_BLOCK_SIZE);
@@ -303,6 +307,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
brelse(bh);
+ unlock_kernel();
return 0;
outi:
@@ -312,6 +317,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
outnobh:
kfree(qs);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index a6090aa..9b3983f 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -35,6 +35,7 @@
#include <linux/sched.h>
#include <linux/parser.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
#include "internal.h"
@@ -220,6 +221,8 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
struct dentry *root;
int err;
+ lock_kernel();
+
save_mount_options(sb, data);
fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL);
@@ -253,11 +256,13 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
goto fail;
}
+ unlock_kernel();
return 0;
fail:
kfree(fsi);
sb->s_fs_info = NULL;
iput(inode);
+ unlock_kernel();
return err;
}
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index f0ad05f..f32bf62 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1608,6 +1608,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
char *qf_names[MAXQUOTAS] = {};
unsigned int qfmt = 0;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
@@ -1852,6 +1854,7 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
init_waitqueue_head(&(sbi->s_wait));
spin_lock_init(&sbi->bitmap_lock);
+ unlock_kernel();
return (0);
error:
@@ -1872,6 +1875,7 @@ error:
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return errval;
}
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index c117fa8..7342617 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -468,6 +468,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
size_t len;
int ret;
+ lock_kernel();
+
#ifdef CONFIG_BLOCK
if (!sb->s_mtd) {
sb_set_blocksize(sb, ROMBSIZE);
@@ -484,8 +486,10 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
/* read the image superblock and check it */
rsb = kmalloc(512, GFP_KERNEL);
- if (!rsb)
+ if (!rsb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = (void *) 512;
ret = romfs_dev_read(sb, 0, rsb, 512);
@@ -535,15 +539,18 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
if (!sb->s_root)
goto error_i;
+ unlock_kernel();
return 0;
error_i:
iput(root);
error:
+ unlock_kernel();
return -EINVAL;
error_rsb_inval:
ret = -EINVAL;
error_rsb:
+ unlock_kernel();
return ret;
}
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 1c4c8f0..c3c9044 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -500,6 +500,8 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
void *mem;
static int warn_count;
+ lock_kernel();
+
if (warn_count < 5) {
warn_count++;
printk(KERN_EMERG "smbfs is deprecated and will be removed"
@@ -615,6 +617,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
smb_new_dentry(sb->s_root);
+ unlock_kernel();
return 0;
out_no_root:
@@ -635,9 +638,11 @@ out_wrong_data:
out_no_data:
printk(KERN_ERR "smb_fill_super: missing data argument\n");
out_fail:
+ unlock_kernel();
return -EINVAL;
out_no_server:
printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 6c197ef..23cea83 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -78,11 +78,14 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
u64 lookup_table_start;
int err;
+ lock_kernel();
+
TRACE("Entered squashfs_fill_superblock\n");
sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL);
if (sb->s_fs_info == NULL) {
ERROR("Failed to allocate squashfs_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
msblk = sb->s_fs_info;
@@ -286,6 +289,7 @@ allocate_root:
TRACE("Leaving squashfs_fill_super\n");
kfree(sblk);
+ unlock_kernel();
return 0;
failed_mount:
@@ -299,12 +303,14 @@ failed_mount:
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
kfree(sblk);
+ unlock_kernel();
return err;
failure:
kfree(msblk->stream.workspace);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 4974995..2e5a870 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include "sysfs.h"
@@ -45,6 +46,8 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = SYSFS_MAGIC;
@@ -58,6 +61,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
mutex_unlock(&sysfs_mutex);
if (!inode) {
pr_debug("sysfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -66,10 +70,12 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
root->d_fsdata = &sysfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/sysv/super.c b/fs/sysv/super.c
index 5a903da..145d949 100644
--- a/fs/sysv/super.c
+++ b/fs/sysv/super.c
@@ -357,7 +357,9 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
struct sysv_sb_info *sbi;
unsigned long blocknr;
int size = 0, i;
-
+
+ lock_kernel();
+
BUILD_BUG_ON(1024 != sizeof (struct xenix_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv4_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv2_super_block));
@@ -365,8 +367,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
BUILD_BUG_ON(64 != sizeof (struct sysv_inode));
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -409,8 +413,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
if (bh && bh1) {
sbi->s_bh1 = bh1;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, size))
+ if (complete_read_super(sb, silent, size)) {
+ unlock_kernel();
return 0;
+ }
}
brelse(bh1);
@@ -419,6 +425,7 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
printk("oldfs: cannot read superblock\n");
failed:
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
Eunknown:
@@ -442,14 +449,18 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
struct v7_super_block *v7sb;
struct sysv_inode *v7i;
+ lock_kernel();
+
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad i-node size");
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -487,13 +498,16 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_bh1 = bh;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, 1))
+ if (complete_read_super(sb, silent, 1)) {
+ unlock_kernel();
return 0;
+ }
failed:
brelse(bh2);
brelse(bh);
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 333e181..04a0fc9 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2029,6 +2029,8 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
struct super_block *sb;
int err;
+ lock_kernel();
+
dbg_gen("name %s, flags %#x", name, flags);
/*
@@ -2040,6 +2042,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
if (IS_ERR(ubi)) {
ubifs_err("cannot open \"%s\", error %d",
name, (int)PTR_ERR(ubi));
+ unlock_kernel();
return PTR_ERR(ubi);
}
ubi_get_volume_info(ubi, &vi);
@@ -2077,12 +2080,14 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
ubi_close_volume(ubi);
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
out_deact:
deactivate_locked_super(sb);
out_close:
ubi_close_volume(ubi);
+ unlock_kernel();
return err;
}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9d1b8c2..fa6f8db 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1866,6 +1866,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
struct kernel_lb_addr rootdir, fileset;
struct udf_sb_info *sbi;
+ lock_kernel();
+
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
uopt.uid = -1;
uopt.gid = -1;
@@ -1874,8 +1876,10 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
uopt.dmode = UDF_INVALID_MODE;
sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -2021,6 +2025,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
goto error_out;
}
sb->s_maxbytes = MAX_LFS_FILESIZE;
+ unlock_kernel();
return 0;
error_out:
@@ -2041,6 +2046,7 @@ error_out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 5faed79..31ad198 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -646,6 +646,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
unsigned maxsymlen;
int ret = -EINVAL;
+ lock_kernel();
+
uspi = NULL;
ubh = NULL;
flags = 0;
@@ -1107,6 +1109,7 @@ magic_found:
goto failed;
UFSD("EXIT\n");
+ unlock_kernel();
return 0;
dalloc_failed:
@@ -1118,10 +1121,12 @@ failed:
kfree(sbi);
sb->s_fs_info = NULL;
UFSD("EXIT (FAILED)\n");
+ unlock_kernel();
return ret;
failed_nomem:
UFSD("EXIT (NOMEM)\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 18a4b8e..7426166 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1412,6 +1412,8 @@ xfs_fs_fill_super(
int flags = 0, error = ENOMEM;
char *mtpt = NULL;
+ lock_kernel();
+
mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
if (!mp)
goto out;
@@ -1506,6 +1508,7 @@ xfs_fs_fill_super(
kfree(mtpt);
xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
+ unlock_kernel();
return 0;
out_filestream_unmount:
@@ -1522,6 +1525,7 @@ xfs_fs_fill_super(
kfree(mtpt);
kfree(mp);
out:
+ unlock_kernel();
return -error;
fail_vnrele:
--
1.6.4.2
------------------------------------------------------------------------------
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^ permalink raw reply related [flat|nested] 70+ messages in thread* [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
@ 2009-11-02 10:04 ` Jan Blunck
0 siblings, 0 replies; 70+ messages in thread
From: Jan Blunck @ 2009-11-02 10:04 UTC (permalink / raw)
To: linux-fsdevel
Cc: Latchesar Ionkov, Andreas Dilger, Anders Larsen, J. Bruce Fields,
Christoph Hellwig, Alessio Igor Bogani, Arte m Bityutskiy,
James Morris, Petr Vandrovec, KOSAKI Motohiro, Abhishek Kulkarni,
Matthew Wilcox, Eric Van Hensbergen, Al Viro, Matt Mackall,
Thomas Gleixner, Dustin Kirkland, Tigran A. Aivazian,
linux-kernel, Sukadev Bhattiprolu, Chuck Lever, Tejun Heo,
Serge Hallyn, Csaba Henk, Wu Fengguang, Roman Zippel,
Eric Sesterhenn, Coly Li, co, Clemens Ladisch, KONISHI Ryusuke,
Yan Zheng, Bernd Schmidt, Eric Sandeen, codalist, Marcin Slusarz,
Wolfgang Illmeyer, Phillip Lougher, Mark Fasheh, reiserfs-devel,
osd-dev, Sage Weil, Andrew Morton, OGAWA Hirofumi, autofs,
Theodore Ts'o, linux-ntfs-dev, David VomLehn, Benny Halevy,
Tyler Hicks, Adrian Hunter, Qinghuang Feng, users, linux-mtd,
Jens Axboe, Dave Kleikamp, linux-afs, Ian Kent, Nick Piggin,
Jeff Layton, Miklos Szeredi, Sergey S. Kostyliov, Joel Becker,
Alex Elder, Jiro SEKIBA, linux-ext4, linux-cifs-client,
Alexey Dobriyan, Mel Gorman, Bob Copeland, Jeff Dike,
ecryptfs-devel, Felix Blyakher, xfs, xfs-masters, Pekka Enberg,
Chris Mason, Jan Harkes, linux-nfs, Greg Kroah-Hartman,
Roel Kluin, da, Steve French, Julia Lawall, ocfs2-devel,
Niv Sardi, jfs-discussion, Jan Kara, Neil Brown, Jeff Mahoney,
Trond Myklebust, William Irwin, David Howells,
Anton Altaparmakov, Mikulas Patocka, samba-technical, Jan Blunck,
Eric W. Biederman, cluster-devel, Jeff Moyer, Boaz Harrosh,
v9fs-developer, Sunil Mushran, Evgeniy Dushistov,
user-mode-linux-devel, fuse-devel, Masayuki Hamaguchi,
user-mode-linux-user, Steven Whitehouse, Alan Cox, Dave Chinner,
Denis Karpov, Ron Minnich, David Woodhouse, linux-karma-devel,
linux-btrfs
I've read through all the code formerly covered by the BKL inside
do_kern_mount() and have satisfied myself that it doesn't need the BKL
any more.
do_kern_mount() is already called without the BKL when mounting the rootfs
and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called
from various places without BKL: simple_pin_fs(), nfs_do_clone_mount()
through nfs_follow_mountpoint(), afs_mntpt_do_automount() through
afs_mntpt_follow_link(). Both later functions are actually the filesystems
follow_link inode operation. vfs_kern_mount() is calling the specified
get_sb function and lets the filesystem do its job by calling the given
fill_super function.
Therefore I think it is safe to push down the BKL from the VFS to the
low-level filesystems get_sb/fill_super operation.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Matthew Wilcox <matthew@wil.cx>
---
fs/9p/vfs_super.c | 9 ++++++++-
fs/adfs/super.c | 8 +++++++-
fs/affs/super.c | 9 ++++++++-
fs/afs/super.c | 5 +++++
fs/autofs4/inode.c | 4 ++++
fs/befs/linuxvfs.c | 4 ++++
fs/bfs/inode.c | 9 ++++++++-
fs/binfmt_misc.c | 6 +++++-
fs/btrfs/super.c | 8 +++++++-
fs/cifs/cifsfs.c | 12 ++++++++++--
fs/coda/inode.c | 8 +++++++-
fs/configfs/mount.c | 5 +++++
fs/cramfs/inode.c | 8 +++++++-
fs/devpts/inode.c | 13 +++++++++++--
fs/ecryptfs/main.c | 3 +++
fs/efs/super.c | 10 ++++++++--
fs/exofs/super.c | 7 ++++++-
fs/ext2/super.c | 10 ++++++++--
fs/ext3/super.c | 9 ++++++++-
fs/ext4/super.c | 9 ++++++---
fs/fat/namei_msdos.c | 6 +++++-
fs/fat/namei_vfat.c | 6 +++++-
fs/freevxfs/vxfs_super.c | 7 ++++++-
fs/fuse/control.c | 9 ++++++++-
fs/fuse/inode.c | 5 +++++
fs/gfs2/ops_fstype.c | 9 +++++++++
fs/hfs/super.c | 8 +++++++-
fs/hfsplus/super.c | 8 +++++++-
fs/hostfs/hostfs_kern.c | 4 ++++
fs/hpfs/super.c | 8 +++++++-
fs/hppfs/hppfs.c | 4 ++++
fs/hugetlbfs/inode.c | 12 ++++++++++--
fs/isofs/inode.c | 8 +++++++-
fs/jffs2/super.c | 11 +++++++++--
fs/jfs/super.c | 14 ++++++++++++--
fs/libfs.c | 10 +++++++++-
fs/minix/inode.c | 8 +++++++-
fs/namespace.c | 2 --
fs/ncpfs/inode.c | 8 +++++++-
fs/nfs/super.c | 19 +++++++++++++++++++
fs/nfsd/nfsctl.c | 7 ++++++-
fs/nilfs2/super.c | 9 ++++++++-
fs/ntfs/super.c | 5 +++++
fs/ocfs2/dlm/dlmfs.c | 8 +++++++-
fs/ocfs2/super.c | 5 +++++
fs/omfs/inode.c | 7 ++++++-
fs/openpromfs/inode.c | 4 ++++
fs/proc/root.c | 9 ++++++++-
fs/qnx4/inode.c | 8 +++++++-
fs/ramfs/inode.c | 5 +++++
fs/reiserfs/super.c | 4 ++++
fs/romfs/super.c | 9 ++++++++-
fs/smbfs/inode.c | 5 +++++
fs/squashfs/super.c | 6 ++++++
fs/sysfs/mount.c | 6 ++++++
fs/sysv/super.c | 24 +++++++++++++++++++-----
fs/ubifs/super.c | 5 +++++
fs/udf/super.c | 8 +++++++-
fs/ufs/super.c | 5 +++++
fs/xfs/linux-2.6/xfs_super.c | 4 ++++
60 files changed, 412 insertions(+), 53 deletions(-)
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 14a8644..4156a0c 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -106,11 +106,15 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
struct p9_fid *fid;
int retval = 0;
+ lock_kernel();
+
P9_DPRINTK(P9_DEBUG_VFS, " \n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
- if (!v9ses)
+ if (!v9ses) {
+ unlock_kernel();
return -ENOMEM;
+ }
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
@@ -155,6 +159,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
free_stat:
@@ -167,12 +172,14 @@ clunk_fid:
close_session:
v9fs_session_close(v9ses);
kfree(v9ses);
+ unlock_kernel();
return retval;
release_sb:
p9stat_free(st);
kfree(st);
deactivate_locked_super(sb);
+ unlock_kernel();
return retval;
}
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 6910a98..e94f111 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -351,11 +351,15 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
struct adfs_sb_info *asb;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_NODIRATIME;
asb = kzalloc(sizeof(*asb), GFP_KERNEL);
- if (!asb)
+ if (!asb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = asb;
/* set default options */
@@ -473,6 +477,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
goto error;
} else
sb->s_root->d_op = &adfs_dentry_operations;
+ unlock_kernel();
return 0;
error_free_bh:
@@ -480,6 +485,7 @@ error_free_bh:
error:
sb->s_fs_info = NULL;
kfree(asb);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 104fdcb..135f0d3 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -298,6 +298,8 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
u8 sig[4];
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, data);
pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
@@ -307,8 +309,10 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_flags |= MS_NODIRATIME;
sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
mutex_init(&sbi->s_bmlock);
@@ -316,6 +320,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
&blocksize,&sbi->s_prefix,
sbi->s_volume, &mount_flags)) {
printk(KERN_ERR "AFFS: Error parsing options\n");
+ unlock_kernel();
return -EINVAL;
}
/* N.B. after this point s_prefix must be released */
@@ -486,6 +491,7 @@ got_root:
sb->s_root->d_op = &affs_dentry_operations;
pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
+ unlock_kernel();
return 0;
/*
@@ -500,6 +506,7 @@ out_error_noinode:
kfree(sbi->s_prefix);
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/afs/super.c b/fs/afs/super.c
index e1ea1c2..108fb3e 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -294,12 +294,15 @@ static int afs_fill_super(struct super_block *sb, void *data)
struct inode *inode = NULL;
int ret;
+ lock_kernel();
+
_enter("");
/* allocate a superblock info record */
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
if (!as) {
_leave(" = -ENOMEM");
+ unlock_kernel();
return -ENOMEM;
}
@@ -329,6 +332,7 @@ static int afs_fill_super(struct super_block *sb, void *data)
sb->s_root = root;
_leave(" = 0");
+ unlock_kernel();
return 0;
error_inode:
@@ -342,6 +346,7 @@ error:
sb->s_fs_info = NULL;
_leave(" = %d", ret);
+ unlock_kernel();
return ret;
}
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 69c8142..3adaba9 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -323,6 +323,8 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
struct autofs_sb_info *sbi;
struct autofs_info *ino;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto fail_unlock;
@@ -418,6 +420,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
* Success! Install the root dentry now to indicate completion.
*/
s->s_root = root;
+ unlock_kernel();
return 0;
/*
@@ -439,6 +442,7 @@ fail_free:
kfree(sbi);
s->s_fs_info = NULL;
fail_unlock:
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 33baf27..f2aa193 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -759,6 +759,8 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
const unsigned long sb_block = 0;
const off_t x86_sb_off = 512;
+ lock_kernel();
+
save_mount_options(sb, data);
sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
@@ -867,6 +869,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
befs_sb->nls = load_nls_default();
}
+ unlock_kernel();
return 0;
/*****************/
unacquire_bh:
@@ -877,6 +880,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
unacquire_none:
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 6f60336..4bff506 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -356,9 +356,13 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
long ret = -EINVAL;
unsigned long i_sblock, i_eblock, i_eoff, s_size;
+ lock_kernel();
+
info = kzalloc(sizeof(*info), GFP_KERNEL);
- if (!info)
+ if (!info) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = info;
sb_set_blocksize(s, BFS_BSIZE);
@@ -463,6 +467,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
kfree(info->si_imap);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return -EIO;
}
@@ -484,12 +489,14 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
}
dump_imap("read_super", s);
mutex_init(&info->bfs_lock);
+ unlock_kernel();
return 0;
out:
brelse(bh);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c4e8353..ca0e22d 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -695,9 +695,13 @@ static int bm_fill_super(struct super_block * sb, void * data, int silent)
[3] = {"register", &bm_register_operations, S_IWUSR},
/* last one */ {""}
};
- int err = simple_fill_super(sb, 0x42494e4d, bm_files);
+ int err;
+
+ lock_kernel();
+ err = simple_fill_super(sb, 0x42494e4d, bm_files);
if (!err)
sb->s_op = &s_ops;
+ unlock_kernel();
return err;
}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 752a546..e5cd2cf 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -480,13 +480,17 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
fmode_t mode = FMODE_READ;
int error = 0;
+ lock_kernel();
+
if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
error = btrfs_parse_early_options(data, mode, fs_type,
&subvol_name, &fs_devices);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
error = btrfs_scan_one_device(dev_name, mode, fs_type, &fs_devices);
if (error)
@@ -555,6 +559,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
mnt->mnt_root = root;
kfree(subvol_name);
+ unlock_kernel();
return 0;
error_s:
@@ -563,6 +568,7 @@ error_close_devices:
btrfs_close_devices(fs_devices);
error_free_subvol_name:
kfree(subvol_name);
+ unlock_kernel();
return error;
}
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 9a5e4f5..09ccb9d 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -596,22 +596,30 @@ cifs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
int rc;
- struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
+ struct super_block *sb;
+
+ lock_kernel();
+
+ sb = sget(fs_type, NULL, set_anon_super, NULL);
cFYI(1, ("Devname: %s flags: %d ", dev_name, flags));
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
sb->s_flags = flags;
rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
if (rc) {
deactivate_locked_super(sb);
+ unlock_kernel();
return rc;
}
sb->s_flags |= MS_ACTIVE;
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 830f51a..d081fc5 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -147,6 +147,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
int error;
int idx;
+ lock_kernel();
+
idx = get_device_index((struct coda_mount_data *) data);
/* Ignore errors in data, for backward compatibility */
@@ -158,11 +160,13 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
vc = &coda_comms[idx];
if (!vc->vc_inuse) {
printk("coda_read_super: No pseudo device\n");
+ unlock_kernel();
return -EINVAL;
}
if ( vc->vc_sb ) {
printk("coda_read_super: Device already mounted\n");
+ unlock_kernel();
return -EBUSY;
}
@@ -196,7 +200,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root = d_alloc_root(root);
if (!sb->s_root)
goto error;
- return 0;
+ unlock_kernel();
+ return 0;
error:
if (root)
@@ -204,6 +209,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
if (vc)
vc->vc_sb = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 8421cea..5b2e06e 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -71,6 +71,8 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = CONFIGFS_MAGIC;
@@ -87,6 +89,7 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
inc_nlink(inode);
} else {
pr_debug("configfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -94,12 +97,14 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
config_group_init(&configfs_root_group);
configfs_root_group.cg_item.ci_dentry = root;
root->d_fsdata = &configfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index dd3634e..13e696a 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -227,11 +227,15 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
struct cramfs_sb_info *sbi;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_RDONLY;
sbi = kzalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* Invalidate the read buffers on mount: think disk change.. */
@@ -308,10 +312,12 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
iput(root);
goto out;
}
+ unlock_kernel();
return 0;
out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index d5f8c96..e206eef 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -24,6 +24,7 @@
#include <linux/parser.h>
#include <linux/fsnotify.h>
#include <linux/seq_file.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define DEVPTS_DEFAULT_MODE 0600
/*
@@ -363,17 +364,23 @@ static int devpts_get_sb(struct file_system_type *fs_type,
struct pts_mount_opts opts;
struct super_block *s;
+ lock_kernel();
+
error = parse_mount_options(data, PARSE_MOUNT, &opts);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
if (opts.newinstance)
s = sget(fs_type, NULL, set_anon_super, NULL);
else
s = sget(fs_type, compare_init_pts_sb, set_anon_super, NULL);
- if (IS_ERR(s))
+ if (IS_ERR(s)) {
+ unlock_kernel();
return PTR_ERR(s);
+ }
if (!s->s_root) {
s->s_flags = flags;
@@ -391,6 +398,7 @@ static int devpts_get_sb(struct file_system_type *fs_type,
if (error)
goto out_dput;
+ unlock_kernel();
return 0;
out_dput:
@@ -398,6 +406,7 @@ out_dput:
out_undo_sget:
deactivate_locked_super(s);
+ unlock_kernel();
return error;
}
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index c6ac85d..fdc7bda 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -600,6 +600,8 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
int rc;
struct super_block *sb;
+ lock_kernel();
+
rc = get_sb_nodev(fs_type, flags, raw_data, ecryptfs_fill_super, mnt);
if (rc < 0) {
printk(KERN_ERR "Getting sb failed; rc = [%d]\n", rc);
@@ -621,6 +623,7 @@ out_abort:
dput(sb->s_root); /* aka mnt->mnt_root, as set by get_sb_nodev() */
deactivate_locked_super(sb);
out:
+ unlock_kernel();
return rc;
}
diff --git a/fs/efs/super.c b/fs/efs/super.c
index f049428..0981141 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -249,9 +249,13 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
struct inode *root;
int ret = -EINVAL;
- sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
- if (!sb)
+ lock_kernel();
+
+ sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
+ if (!sb) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sb;
s->s_magic = EFS_SUPER_MAGIC;
@@ -319,12 +323,14 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
goto out_no_fs;
}
+ unlock_kernel();
return 0;
out_no_fs_ul:
out_no_fs:
s->s_fs_info = NULL;
kfree(sb);
+ unlock_kernel();
return ret;
}
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 9f500de..ea045b8 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -297,9 +297,13 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
struct osd_obj_id obj;
int ret;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* use mount options to fill superblock */
@@ -399,6 +403,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
out:
if (or)
osd_end_request(or);
+ unlock_kernel();
return ret;
free_sbi:
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 1a9ffee..5af1775 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -745,15 +745,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
+ err = -ENOMEM;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
- return -ENOMEM;
+ goto failed_unlock;
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
- return -ENOMEM;
+ goto failed_unlock;
}
sb->s_fs_info = sbi;
sbi->s_sb_block = sb_block;
@@ -1063,6 +1066,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
ext2_warning(sb, __func__,
"mounting ext3 filesystem as ext2");
ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+ unlock_kernel();
return 0;
cantfind_ext2:
@@ -1086,6 +1090,8 @@ failed_sbi:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
+failed_unlock:
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 7a520a8..38261a5 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1568,14 +1568,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -1992,6 +1997,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
"writeback");
lock_kernel();
+ unlock_kernel();
return 0;
cantfind_ext3:
@@ -2022,6 +2028,7 @@ out_fail:
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
lock_kernel();
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 312211e..9db81d2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2328,14 +2328,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
int err;
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -2913,7 +2918,6 @@ no_journal:
ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr);
- lock_kernel();
return 0;
cantfind_ext4:
@@ -2959,7 +2963,6 @@ out_fail:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
- lock_kernel();
return ret;
}
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index bbc94ae..31dd072 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -662,12 +662,16 @@ static int msdos_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
sb->s_flags |= MS_NOATIME;
sb->s_root->d_op = &msdos_dentry_operations;
+ unlock_kernel();
return 0;
}
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index f565f24..12961b8 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -1044,15 +1044,19 @@ static int vfat_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &vfat_dir_inode_operations, 1);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
if (MSDOS_SB(sb)->options.name_check != 's')
sb->s_root->d_op = &vfat_ci_dentry_ops;
else
sb->s_root->d_op = &vfat_dentry_ops;
+ unlock_kernel();
return 0;
}
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index 1e8af93..b8b7821 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -148,7 +148,7 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data)
* The superblock on success, else %NULL.
*
* Locking:
- * We are under the bkl and @sbp->s_lock.
+ * We are under @sbp->s_lock.
*/
static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
{
@@ -159,11 +159,14 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
struct inode *root;
int ret = -EINVAL;
+ lock_kernel();
+
sbp->s_flags |= MS_RDONLY;
infp = kzalloc(sizeof(*infp), GFP_KERNEL);
if (!infp) {
printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -236,6 +239,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
goto out_free_ilist;
}
+ unlock_kernel();
return 0;
out_free_ilist:
@@ -245,6 +249,7 @@ out_free_ilist:
out:
brelse(bp);
kfree(infp);
+ unlock_kernel();
return ret;
}
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 3773fd6..8d769f7 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -10,6 +10,7 @@
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define FUSE_CTL_SUPER_MAGIC 0x65735543
@@ -297,9 +298,13 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
struct fuse_conn *fc;
int err;
+ lock_kernel();
+
err = simple_fill_super(sb, FUSE_CTL_SUPER_MAGIC, &empty_descr);
- if (err)
+ if (err) {
+ unlock_kernel();
return err;
+ }
mutex_lock(&fuse_mutex);
BUG_ON(fuse_control_sb);
@@ -309,10 +314,12 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
if (err) {
fuse_control_sb = NULL;
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return err;
}
}
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return 0;
}
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1a822ce..5690279 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -20,6 +20,7 @@
#include <linux/random.h>
#include <linux/sched.h>
#include <linux/exportfs.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
MODULE_DESCRIPTION("Filesystem in Userspace");
@@ -919,6 +920,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
int err;
int is_bdev = sb->s_bdev != NULL;
+ lock_kernel();
+
err = -EINVAL;
if (sb->s_flags & MS_MANDLOCK)
goto err;
@@ -1022,6 +1025,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
fuse_send_init(fc, init_req);
+ unlock_kernel();
return 0;
err_unlock:
@@ -1036,6 +1040,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
err_fput:
fput(file);
err:
+ unlock_kernel();
return err;
}
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 52fb6c0..76415fe 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1120,9 +1120,12 @@ static int fill_super(struct super_block *sb, void *data, int silent)
struct gfs2_holder mount_gh;
int error;
+ lock_kernel();
+
sdp = init_sbd(sb);
if (!sdp) {
printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -1211,6 +1214,7 @@ static int fill_super(struct super_block *sb, void *data, int silent)
gfs2_glock_dq_uninit(&mount_gh);
gfs2_online_uevent(sdp);
+ unlock_kernel();
return 0;
fail_threads:
@@ -1240,6 +1244,7 @@ fail:
gfs2_delete_debugfs_file(sdp);
kfree(sdp);
sb->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
@@ -1268,10 +1273,12 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
struct path path;
int error;
+ lock_kernel();
error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
if (error) {
printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
dev_name, error);
+ unlock_kernel();
return error;
}
s = sget(&gfs2_fs_type, test_meta_super, set_meta_super,
@@ -1279,11 +1286,13 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
path_put(&path);
if (IS_ERR(s)) {
printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
+ unlock_kernel();
return PTR_ERR(s);
}
sdp = s->s_fs_info;
mnt->mnt_sb = s;
mnt->mnt_root = dget(sdp->sd_master_dir);
+ unlock_kernel();
return 0;
}
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index f7fcbe4..a2e19ff 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -381,9 +381,13 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root_inode;
int res;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -429,6 +433,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root->d_op = &hfs_dentry_operations;
/* everything's okay */
+ unlock_kernel();
return 0;
bail_iput:
@@ -437,6 +442,7 @@ bail_no_root:
printk(KERN_ERR "hfs: get root inode failed.\n");
bail:
hfs_mdb_put(sb);
+ unlock_kernel();
return res;
}
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 43022f3..824f57a 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -312,9 +312,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
struct nls_table *nls = NULL;
int err = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -459,11 +463,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
out:
unload_nls(sbi->nls);
sbi->nls = nls;
+ unlock_kernel();
return 0;
cleanup:
hfsplus_put_super(sb);
unload_nls(nls);
+ unlock_kernel();
return err;
}
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 032604e..5eb2c26 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -968,6 +968,8 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
char *host_root_path, *req_root = d;
int err;
+ lock_kernel();
+
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = HOSTFS_SUPER_MAGIC;
@@ -1016,6 +1018,7 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
goto out;
}
+ unlock_kernel();
return 0;
out_put:
@@ -1023,6 +1026,7 @@ out_put:
out_free:
kfree(host_root_path);
out:
+ unlock_kernel();
return err;
}
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2feaa0..a7b348a 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -477,11 +477,15 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
int o;
+ lock_kernel();
+
save_mount_options(s, options);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
sbi->sb_bmp_dir = NULL;
@@ -666,6 +670,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
root->i_blocks = 5;
hpfs_brelse4(&qbh);
}
+ unlock_kernel();
return 0;
bail4: brelse(bh2);
@@ -677,6 +682,7 @@ bail0:
kfree(sbi->sb_cp_table);
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index a5089a6..6263973 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -712,6 +712,8 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
struct vfsmount *proc_mnt;
int err = -ENOENT;
+ lock_kernel();
+
proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
if (IS_ERR(proc_mnt))
goto out;
@@ -731,6 +733,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
if (!sb->s_root)
goto out_iput;
+ unlock_kernel();
return 0;
out_iput:
@@ -738,6 +741,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
out_mntput:
mntput(proc_mnt);
out:
+ unlock_kernel();
return(err);
}
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 87a1258..53be2b9 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -32,6 +32,7 @@
#include <linux/security.h>
#include <linux/ima.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -824,6 +825,7 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
struct hugetlbfs_config config;
struct hugetlbfs_sb_info *sbinfo;
+ lock_kernel();
save_mount_options(sb, data);
config.nr_blocks = -1; /* No limit on size by default */
@@ -833,12 +835,16 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
config.mode = 0755;
config.hstate = &default_hstate;
ret = hugetlbfs_parse_options(data, &config);
- if (ret)
+ if (ret) {
+ unlock_kernel();
return ret;
+ }
sbinfo = kmalloc(sizeof(struct hugetlbfs_sb_info), GFP_KERNEL);
- if (!sbinfo)
+ if (!sbinfo) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbinfo;
sbinfo->hstate = config.hstate;
spin_lock_init(&sbinfo->stat_lock);
@@ -863,9 +869,11 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
goto out_free;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
out_free:
kfree(sbinfo);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 6b4dcd4..7c501d5 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -571,11 +571,15 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
int table, error = -EINVAL;
unsigned int vol_desc_start;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
if (!parse_options((char *)data, &opt))
@@ -895,6 +899,7 @@ root_found:
kfree(opt.iocharset);
+ unlock_kernel();
return 0;
/*
@@ -934,6 +939,7 @@ out_freesbi:
kfree(opt.iocharset);
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 9a80e8e..622bd51 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -148,14 +148,19 @@ static const struct super_operations jffs2_super_operations =
static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
{
struct jffs2_sb_info *c;
+ int ret;
+
+ lock_kernel();
D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():"
" New superblock for device %d (\"%s\")\n",
sb->s_mtd->index, sb->s_mtd->name));
c = kzalloc(sizeof(*c), GFP_KERNEL);
- if (!c)
+ if (!c) {
+ unlock_kernel();
return -ENOMEM;
+ }
c->mtd = sb->s_mtd;
c->os_priv = sb;
@@ -177,7 +182,9 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
#endif
- return jffs2_do_fill_super(sb, data, silent);
+ ret = jffs2_do_fill_super(sb, data, silent);
+ unlock_kernel();
+ return ret;
}
static int jffs2_get_sb(struct file_system_type *fs_type,
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 2234c73..329d7b6 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -425,14 +425,20 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
s64 newLVSize = 0;
int flag, ret = -EINVAL;
+ lock_kernel();
+
jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
- if (!new_valid_dev(sb->s_bdev->bd_dev))
+ if (!new_valid_dev(sb->s_bdev->bd_dev)) {
+ unlock_kernel();
return -EOVERFLOW;
+ }
sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
sbi->sb = sb;
sbi->uid = sbi->gid = sbi->umask = -1;
@@ -442,6 +448,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
sbi->flag = flag;
@@ -452,6 +459,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (newLVSize) {
printk(KERN_ERR "resize option for remount only\n");
+ unlock_kernel();
return -EINVAL;
}
@@ -527,6 +535,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
#endif
sb->s_time_gran = 1;
+ unlock_kernel();
return 0;
out_no_root:
@@ -548,6 +557,7 @@ out_kfree:
if (sbi->nls_tab)
unload_nls(sbi->nls_tab);
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/libfs.c b/fs/libfs.c
index 219576c..3484040 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -11,6 +11,7 @@
#include <linux/exportfs.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -422,6 +423,8 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
struct dentry *dentry;
int i;
+ lock_kernel();
+
s->s_blocksize = PAGE_CACHE_SIZE;
s->s_blocksize_bits = PAGE_CACHE_SHIFT;
s->s_magic = magic;
@@ -429,8 +432,10 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
s->s_time_gran = 1;
inode = new_inode(s);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
/*
* because the root inode is 1, the files array must not contain an
* entry at index 1
@@ -444,6 +449,7 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
for (i = 0; !files->name || files->name[0]; i++, files++) {
@@ -469,10 +475,12 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
d_add(dentry, inode);
}
s->s_root = root;
+ unlock_kernel();
return 0;
out:
d_genocide(root);
dput(root);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 74ea82d..b8aa0a6 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -147,9 +147,13 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
struct minix_sb_info *sbi;
int ret = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
BUILD_BUG_ON(32 != sizeof (struct minix_inode));
@@ -265,6 +269,7 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
else if (sbi->s_mount_state & MINIX_ERROR_FS)
printk("MINIX-fs: mounting file system with errors, "
"running fsck is recommended\n");
+ unlock_kernel();
return 0;
out_iput:
@@ -314,6 +319,7 @@ out_bad_sb:
out:
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/namespace.c b/fs/namespace.c
index bdc3cb4..3f95497 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1647,9 +1647,7 @@ static int do_new_mount(struct path *path, char *type, int flags,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- lock_kernel();
mnt = do_kern_mount(type, flags, name, data);
- unlock_kernel();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index cf98da1..a020d86 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -445,10 +445,14 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
#endif
struct ncp_entry_info finfo;
+ lock_kernel();
+
data.wdog_pid = NULL;
server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
- if (!server)
+ if (!server) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = server;
error = -EFAULT;
@@ -695,6 +699,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
if (!sb->s_root)
goto out_no_root;
sb->s_root->d_op = &ncp_root_dentry_operations;
+ unlock_kernel();
return 0;
out_no_root:
@@ -729,6 +734,7 @@ out:
put_pid(data.wdog_pid);
sb->s_fs_info = NULL;
kfree(server);
+ unlock_kernel();
return error;
}
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 90be551..1f97aad 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1877,6 +1877,8 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
options->version <= 6))))
return 0;
+ lock_kernel();
+
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
@@ -2184,6 +2186,7 @@ out:
out_free_fh:
kfree(mntfh);
kfree(data);
+ unlock_kernel();
return error;
out_err_nosb:
@@ -2227,6 +2230,8 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs_xdev_get_sb()\n");
/* create a new volume representation */
@@ -2281,17 +2286,20 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs_xdev_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2475,6 +2483,8 @@ static int nfs4_remote_get_sb(struct file_system_type *fs_type,
};
int error = -ENOMEM;
+ lock_kernel();
+
mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
if (data == NULL || mntfh == NULL)
goto out_free_fh;
@@ -2534,6 +2544,7 @@ out:
security_free_mnt_opts(&data->lsm_opts);
out_free_fh:
kfree(mntfh);
+ unlock_kernel();
return error;
out_free:
@@ -2794,6 +2805,8 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
/* create a new volume representation */
@@ -2847,17 +2860,20 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs4_referral_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2873,6 +2889,8 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
struct vfsmount *root_mnt;
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
export_path = data->mnt_path;
@@ -2890,6 +2908,7 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
out:
dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error,
error != 0 ? " [error]" : "");
+ unlock_kernel();
return error;
}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 5c01fc1..dcaef52 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1347,7 +1347,12 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
#endif
/* last one */ {""}
};
- return simple_fill_super(sb, 0x6e667364, nfsd_files);
+ int ret;
+
+ lock_kernel();
+ ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
+ unlock_kernel();
+ return ret;
}
static int nfsd_get_sb(struct file_system_type *fs_type,
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 644e667..3448ec3 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1059,9 +1059,13 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
struct the_nilfs *nilfs;
int err, need_to_close = 1;
+ lock_kernel();
+
sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type);
- if (IS_ERR(sd.bdev))
+ if (IS_ERR(sd.bdev)) {
+ unlock_kernel();
return PTR_ERR(sd.bdev);
+ }
/*
* To get mount instance using sget() vfs-routine, NILFS needs
@@ -1142,6 +1146,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
if (need_to_close)
close_bdev_exclusive(sd.bdev, flags);
simple_set_mnt(mnt, s);
+ unlock_kernel();
return 0;
failed_unlock:
@@ -1150,6 +1155,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
failed:
close_bdev_exclusive(sd.bdev, flags);
+ unlock_kernel();
return err;
cancel_new:
@@ -1163,6 +1169,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
* We must finish all post-cleaning before this call;
* put_nilfs() needs the block device.
*/
+ unlock_kernel();
return err;
}
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 80b0477..ab09c02 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2723,6 +2723,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
struct inode *tmp_ino;
int blocksize, result;
+ lock_kernel();
+
/*
* We do a pretty difficult piece of bootstrap by reading the
* MFT (and other metadata) from disk into memory. We'll only
@@ -2746,6 +2748,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Allocation of NTFS volume structure "
"failed. Aborting mount...");
lockdep_on();
+ unlock_kernel();
return -ENOMEM;
}
/* Initialize ntfs_volume structure. */
@@ -2933,6 +2936,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
sb->s_export_op = &ntfs_export_ops;
lock_kernel();
lockdep_on();
+ unlock_kernel();
return 0;
}
ntfs_error(sb, "Failed to allocate root directory.");
@@ -3053,6 +3057,7 @@ err_out_now:
kfree(vol);
ntfs_debug("Failed, returning -EINVAL.");
lockdep_on();
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ocfs2/dlm/dlmfs.c b/fs/ocfs2/dlm/dlmfs.c
index 02bf178..58ce813 100644
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlm/dlmfs.c
@@ -528,21 +528,27 @@ static int dlmfs_fill_super(struct super_block * sb,
struct inode * inode;
struct dentry * root;
+ lock_kernel();
+
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = DLMFS_MAGIC;
sb->s_op = &dlmfs_ops;
inode = dlmfs_get_root_inode(sb);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index c0e48ae..fab815f 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -986,6 +986,8 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
char nodestr[8];
struct ocfs2_blockcheck_stats stats;
+ lock_kernel();
+
mlog_entry("%p, %p, %i", sb, data, silent);
if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
@@ -1172,6 +1174,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
atomic_set(&osb->vol_state, VOLUME_DISABLED);
wake_up(&osb->osb_mount_event);
mlog_exit(status);
+ unlock_kernel();
return status;
}
}
@@ -1186,6 +1189,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
ocfs2_orphan_scan_start(osb);
mlog_exit(status);
+ unlock_kernel();
return status;
read_super_error:
@@ -1201,6 +1205,7 @@ read_super_error:
}
mlog_exit(status);
+ unlock_kernel();
return status;
}
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index f3b7c15..ddfbb22 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -416,11 +416,15 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
sector_t start;
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, (char *) data);
sbi = kzalloc(sizeof(struct omfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -525,6 +529,7 @@ out_brelse_bh2:
out_brelse_bh:
brelse(bh);
end:
+ unlock_kernel();
return ret;
}
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index ffcd04f..50dc4be 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -386,6 +386,8 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
struct op_inode_info *oi;
int ret;
+ lock_kernel();
+
s->s_flags |= MS_NOATIME;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
@@ -405,6 +407,7 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
s->s_root = d_alloc_root(root_inode);
if (!s->s_root)
goto out_no_root_dentry;
+ unlock_kernel();
return 0;
out_no_root_dentry:
@@ -412,6 +415,7 @@ out_no_root_dentry:
ret = -ENOMEM;
out_no_root:
printk("openprom_fill_super: get root inode failed\n");
+ unlock_kernel();
return ret;
}
diff --git a/fs/proc/root.c b/fs/proc/root.c
index b080b79..6384680 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -18,6 +18,7 @@
#include <linux/bitops.h>
#include <linux/mount.h>
#include <linux/pid_namespace.h>
+#include <linux/smp_lock.h> /* For lock_kernel() only */
#include "internal.h"
@@ -43,6 +44,8 @@ static int proc_get_sb(struct file_system_type *fs_type,
struct pid_namespace *ns;
struct proc_inode *ei;
+ lock_kernel();
+
if (proc_mnt) {
/* Seed the root directory with a pid so it doesn't need
* to be special in base.c. I would do this earlier but
@@ -60,14 +63,17 @@ static int proc_get_sb(struct file_system_type *fs_type,
ns = current->nsproxy->pid_ns;
sb = sget(fs_type, proc_test_super, proc_set_super, ns);
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
if (!sb->s_root) {
sb->s_flags = flags;
err = proc_fill_super(sb);
if (err) {
deactivate_locked_super(sb);
+ unlock_kernel();
return err;
}
@@ -83,6 +89,7 @@ static int proc_get_sb(struct file_system_type *fs_type,
}
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index d2cd179..18640ce 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -253,9 +253,13 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
struct qnx4_sb_info *qs;
int ret = -EINVAL;
+ lock_kernel();
+
qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
- if (!qs)
+ if (!qs) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = qs;
sb_set_blocksize(s, QNX4_BLOCK_SIZE);
@@ -303,6 +307,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
brelse(bh);
+ unlock_kernel();
return 0;
outi:
@@ -312,6 +317,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
outnobh:
kfree(qs);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index a6090aa..9b3983f 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -35,6 +35,7 @@
#include <linux/sched.h>
#include <linux/parser.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
#include "internal.h"
@@ -220,6 +221,8 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
struct dentry *root;
int err;
+ lock_kernel();
+
save_mount_options(sb, data);
fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL);
@@ -253,11 +256,13 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
goto fail;
}
+ unlock_kernel();
return 0;
fail:
kfree(fsi);
sb->s_fs_info = NULL;
iput(inode);
+ unlock_kernel();
return err;
}
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index f0ad05f..f32bf62 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1608,6 +1608,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
char *qf_names[MAXQUOTAS] = {};
unsigned int qfmt = 0;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
@@ -1852,6 +1854,7 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
init_waitqueue_head(&(sbi->s_wait));
spin_lock_init(&sbi->bitmap_lock);
+ unlock_kernel();
return (0);
error:
@@ -1872,6 +1875,7 @@ error:
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return errval;
}
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index c117fa8..7342617 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -468,6 +468,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
size_t len;
int ret;
+ lock_kernel();
+
#ifdef CONFIG_BLOCK
if (!sb->s_mtd) {
sb_set_blocksize(sb, ROMBSIZE);
@@ -484,8 +486,10 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
/* read the image superblock and check it */
rsb = kmalloc(512, GFP_KERNEL);
- if (!rsb)
+ if (!rsb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = (void *) 512;
ret = romfs_dev_read(sb, 0, rsb, 512);
@@ -535,15 +539,18 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
if (!sb->s_root)
goto error_i;
+ unlock_kernel();
return 0;
error_i:
iput(root);
error:
+ unlock_kernel();
return -EINVAL;
error_rsb_inval:
ret = -EINVAL;
error_rsb:
+ unlock_kernel();
return ret;
}
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 1c4c8f0..c3c9044 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -500,6 +500,8 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
void *mem;
static int warn_count;
+ lock_kernel();
+
if (warn_count < 5) {
warn_count++;
printk(KERN_EMERG "smbfs is deprecated and will be removed"
@@ -615,6 +617,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
smb_new_dentry(sb->s_root);
+ unlock_kernel();
return 0;
out_no_root:
@@ -635,9 +638,11 @@ out_wrong_data:
out_no_data:
printk(KERN_ERR "smb_fill_super: missing data argument\n");
out_fail:
+ unlock_kernel();
return -EINVAL;
out_no_server:
printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 6c197ef..23cea83 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -78,11 +78,14 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
u64 lookup_table_start;
int err;
+ lock_kernel();
+
TRACE("Entered squashfs_fill_superblock\n");
sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL);
if (sb->s_fs_info == NULL) {
ERROR("Failed to allocate squashfs_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
msblk = sb->s_fs_info;
@@ -286,6 +289,7 @@ allocate_root:
TRACE("Leaving squashfs_fill_super\n");
kfree(sblk);
+ unlock_kernel();
return 0;
failed_mount:
@@ -299,12 +303,14 @@ failed_mount:
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
kfree(sblk);
+ unlock_kernel();
return err;
failure:
kfree(msblk->stream.workspace);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 4974995..2e5a870 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include "sysfs.h"
@@ -45,6 +46,8 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = SYSFS_MAGIC;
@@ -58,6 +61,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
mutex_unlock(&sysfs_mutex);
if (!inode) {
pr_debug("sysfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -66,10 +70,12 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
root->d_fsdata = &sysfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/sysv/super.c b/fs/sysv/super.c
index 5a903da..145d949 100644
--- a/fs/sysv/super.c
+++ b/fs/sysv/super.c
@@ -357,7 +357,9 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
struct sysv_sb_info *sbi;
unsigned long blocknr;
int size = 0, i;
-
+
+ lock_kernel();
+
BUILD_BUG_ON(1024 != sizeof (struct xenix_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv4_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv2_super_block));
@@ -365,8 +367,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
BUILD_BUG_ON(64 != sizeof (struct sysv_inode));
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -409,8 +413,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
if (bh && bh1) {
sbi->s_bh1 = bh1;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, size))
+ if (complete_read_super(sb, silent, size)) {
+ unlock_kernel();
return 0;
+ }
}
brelse(bh1);
@@ -419,6 +425,7 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
printk("oldfs: cannot read superblock\n");
failed:
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
Eunknown:
@@ -442,14 +449,18 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
struct v7_super_block *v7sb;
struct sysv_inode *v7i;
+ lock_kernel();
+
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad i-node size");
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -487,13 +498,16 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_bh1 = bh;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, 1))
+ if (complete_read_super(sb, silent, 1)) {
+ unlock_kernel();
return 0;
+ }
failed:
brelse(bh2);
brelse(bh);
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 333e181..04a0fc9 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2029,6 +2029,8 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
struct super_block *sb;
int err;
+ lock_kernel();
+
dbg_gen("name %s, flags %#x", name, flags);
/*
@@ -2040,6 +2042,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
if (IS_ERR(ubi)) {
ubifs_err("cannot open \"%s\", error %d",
name, (int)PTR_ERR(ubi));
+ unlock_kernel();
return PTR_ERR(ubi);
}
ubi_get_volume_info(ubi, &vi);
@@ -2077,12 +2080,14 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
ubi_close_volume(ubi);
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
out_deact:
deactivate_locked_super(sb);
out_close:
ubi_close_volume(ubi);
+ unlock_kernel();
return err;
}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9d1b8c2..fa6f8db 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1866,6 +1866,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
struct kernel_lb_addr rootdir, fileset;
struct udf_sb_info *sbi;
+ lock_kernel();
+
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
uopt.uid = -1;
uopt.gid = -1;
@@ -1874,8 +1876,10 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
uopt.dmode = UDF_INVALID_MODE;
sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -2021,6 +2025,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
goto error_out;
}
sb->s_maxbytes = MAX_LFS_FILESIZE;
+ unlock_kernel();
return 0;
error_out:
@@ -2041,6 +2046,7 @@ error_out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 5faed79..31ad198 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -646,6 +646,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
unsigned maxsymlen;
int ret = -EINVAL;
+ lock_kernel();
+
uspi = NULL;
ubh = NULL;
flags = 0;
@@ -1107,6 +1109,7 @@ magic_found:
goto failed;
UFSD("EXIT\n");
+ unlock_kernel();
return 0;
dalloc_failed:
@@ -1118,10 +1121,12 @@ failed:
kfree(sbi);
sb->s_fs_info = NULL;
UFSD("EXIT (FAILED)\n");
+ unlock_kernel();
return ret;
failed_nomem:
UFSD("EXIT (NOMEM)\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 18a4b8e..7426166 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1412,6 +1412,8 @@ xfs_fs_fill_super(
int flags = 0, error = ENOMEM;
char *mtpt = NULL;
+ lock_kernel();
+
mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
if (!mp)
goto out;
@@ -1506,6 +1508,7 @@ xfs_fs_fill_super(
kfree(mtpt);
xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
+ unlock_kernel();
return 0;
out_filestream_unmount:
@@ -1522,6 +1525,7 @@ xfs_fs_fill_super(
kfree(mtpt);
kfree(mp);
out:
+ unlock_kernel();
return -error;
fail_vnrele:
--
1.6.4.2
^ permalink raw reply related [flat|nested] 70+ messages in thread* [Ocfs2-devel] [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
@ 2009-11-02 10:04 ` Jan Blunck
0 siblings, 0 replies; 70+ messages in thread
From: Jan Blunck @ 2009-11-02 10:04 UTC (permalink / raw)
To: linux-fsdevel
Cc: Latchesar Ionkov, Andreas Dilger, Anders Larsen, J. Bruce Fields,
Christoph Hellwig, Alessio Igor Bogani, Arte m Bityutskiy,
James Morris, Petr Vandrovec, KOSAKI Motohiro, Abhishek Kulkarni,
Matthew Wilcox, Eric Van Hensbergen, Al Viro, Matt Mackall,
Thomas Gleixner, Dustin Kirkland, Tigran A. Aivazian,
linux-kernel, Sukadev Bhattiprolu, Chuck Lever, Tejun Heo,
Serge Hallyn
I've read through all the code formerly covered by the BKL inside
do_kern_mount() and have satisfied myself that it doesn't need the BKL
any more.
do_kern_mount() is already called without the BKL when mounting the rootfs
and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called
from various places without BKL: simple_pin_fs(), nfs_do_clone_mount()
through nfs_follow_mountpoint(), afs_mntpt_do_automount() through
afs_mntpt_follow_link(). Both later functions are actually the filesystems
follow_link inode operation. vfs_kern_mount() is calling the specified
get_sb function and lets the filesystem do its job by calling the given
fill_super function.
Therefore I think it is safe to push down the BKL from the VFS to the
low-level filesystems get_sb/fill_super operation.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Matthew Wilcox <matthew@wil.cx>
---
fs/9p/vfs_super.c | 9 ++++++++-
fs/adfs/super.c | 8 +++++++-
fs/affs/super.c | 9 ++++++++-
fs/afs/super.c | 5 +++++
fs/autofs4/inode.c | 4 ++++
fs/befs/linuxvfs.c | 4 ++++
fs/bfs/inode.c | 9 ++++++++-
fs/binfmt_misc.c | 6 +++++-
fs/btrfs/super.c | 8 +++++++-
fs/cifs/cifsfs.c | 12 ++++++++++--
fs/coda/inode.c | 8 +++++++-
fs/configfs/mount.c | 5 +++++
fs/cramfs/inode.c | 8 +++++++-
fs/devpts/inode.c | 13 +++++++++++--
fs/ecryptfs/main.c | 3 +++
fs/efs/super.c | 10 ++++++++--
fs/exofs/super.c | 7 ++++++-
fs/ext2/super.c | 10 ++++++++--
fs/ext3/super.c | 9 ++++++++-
fs/ext4/super.c | 9 ++++++---
fs/fat/namei_msdos.c | 6 +++++-
fs/fat/namei_vfat.c | 6 +++++-
fs/freevxfs/vxfs_super.c | 7 ++++++-
fs/fuse/control.c | 9 ++++++++-
fs/fuse/inode.c | 5 +++++
fs/gfs2/ops_fstype.c | 9 +++++++++
fs/hfs/super.c | 8 +++++++-
fs/hfsplus/super.c | 8 +++++++-
fs/hostfs/hostfs_kern.c | 4 ++++
fs/hpfs/super.c | 8 +++++++-
fs/hppfs/hppfs.c | 4 ++++
fs/hugetlbfs/inode.c | 12 ++++++++++--
fs/isofs/inode.c | 8 +++++++-
fs/jffs2/super.c | 11 +++++++++--
fs/jfs/super.c | 14 ++++++++++++--
fs/libfs.c | 10 +++++++++-
fs/minix/inode.c | 8 +++++++-
fs/namespace.c | 2 --
fs/ncpfs/inode.c | 8 +++++++-
fs/nfs/super.c | 19 +++++++++++++++++++
fs/nfsd/nfsctl.c | 7 ++++++-
fs/nilfs2/super.c | 9 ++++++++-
fs/ntfs/super.c | 5 +++++
fs/ocfs2/dlm/dlmfs.c | 8 +++++++-
fs/ocfs2/super.c | 5 +++++
fs/omfs/inode.c | 7 ++++++-
fs/openpromfs/inode.c | 4 ++++
fs/proc/root.c | 9 ++++++++-
fs/qnx4/inode.c | 8 +++++++-
fs/ramfs/inode.c | 5 +++++
fs/reiserfs/super.c | 4 ++++
fs/romfs/super.c | 9 ++++++++-
fs/smbfs/inode.c | 5 +++++
fs/squashfs/super.c | 6 ++++++
fs/sysfs/mount.c | 6 ++++++
fs/sysv/super.c | 24 +++++++++++++++++++-----
fs/ubifs/super.c | 5 +++++
fs/udf/super.c | 8 +++++++-
fs/ufs/super.c | 5 +++++
fs/xfs/linux-2.6/xfs_super.c | 4 ++++
60 files changed, 412 insertions(+), 53 deletions(-)
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 14a8644..4156a0c 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -106,11 +106,15 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
struct p9_fid *fid;
int retval = 0;
+ lock_kernel();
+
P9_DPRINTK(P9_DEBUG_VFS, " \n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
- if (!v9ses)
+ if (!v9ses) {
+ unlock_kernel();
return -ENOMEM;
+ }
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
@@ -155,6 +159,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
free_stat:
@@ -167,12 +172,14 @@ clunk_fid:
close_session:
v9fs_session_close(v9ses);
kfree(v9ses);
+ unlock_kernel();
return retval;
release_sb:
p9stat_free(st);
kfree(st);
deactivate_locked_super(sb);
+ unlock_kernel();
return retval;
}
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 6910a98..e94f111 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -351,11 +351,15 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
struct adfs_sb_info *asb;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_NODIRATIME;
asb = kzalloc(sizeof(*asb), GFP_KERNEL);
- if (!asb)
+ if (!asb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = asb;
/* set default options */
@@ -473,6 +477,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
goto error;
} else
sb->s_root->d_op = &adfs_dentry_operations;
+ unlock_kernel();
return 0;
error_free_bh:
@@ -480,6 +485,7 @@ error_free_bh:
error:
sb->s_fs_info = NULL;
kfree(asb);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 104fdcb..135f0d3 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -298,6 +298,8 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
u8 sig[4];
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, data);
pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
@@ -307,8 +309,10 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_flags |= MS_NODIRATIME;
sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
mutex_init(&sbi->s_bmlock);
@@ -316,6 +320,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
&blocksize,&sbi->s_prefix,
sbi->s_volume, &mount_flags)) {
printk(KERN_ERR "AFFS: Error parsing options\n");
+ unlock_kernel();
return -EINVAL;
}
/* N.B. after this point s_prefix must be released */
@@ -486,6 +491,7 @@ got_root:
sb->s_root->d_op = &affs_dentry_operations;
pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
+ unlock_kernel();
return 0;
/*
@@ -500,6 +506,7 @@ out_error_noinode:
kfree(sbi->s_prefix);
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/afs/super.c b/fs/afs/super.c
index e1ea1c2..108fb3e 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -294,12 +294,15 @@ static int afs_fill_super(struct super_block *sb, void *data)
struct inode *inode = NULL;
int ret;
+ lock_kernel();
+
_enter("");
/* allocate a superblock info record */
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
if (!as) {
_leave(" = -ENOMEM");
+ unlock_kernel();
return -ENOMEM;
}
@@ -329,6 +332,7 @@ static int afs_fill_super(struct super_block *sb, void *data)
sb->s_root = root;
_leave(" = 0");
+ unlock_kernel();
return 0;
error_inode:
@@ -342,6 +346,7 @@ error:
sb->s_fs_info = NULL;
_leave(" = %d", ret);
+ unlock_kernel();
return ret;
}
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 69c8142..3adaba9 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -323,6 +323,8 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
struct autofs_sb_info *sbi;
struct autofs_info *ino;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto fail_unlock;
@@ -418,6 +420,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
* Success! Install the root dentry now to indicate completion.
*/
s->s_root = root;
+ unlock_kernel();
return 0;
/*
@@ -439,6 +442,7 @@ fail_free:
kfree(sbi);
s->s_fs_info = NULL;
fail_unlock:
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 33baf27..f2aa193 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -759,6 +759,8 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
const unsigned long sb_block = 0;
const off_t x86_sb_off = 512;
+ lock_kernel();
+
save_mount_options(sb, data);
sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
@@ -867,6 +869,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
befs_sb->nls = load_nls_default();
}
+ unlock_kernel();
return 0;
/*****************/
unacquire_bh:
@@ -877,6 +880,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
unacquire_none:
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 6f60336..4bff506 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -356,9 +356,13 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
long ret = -EINVAL;
unsigned long i_sblock, i_eblock, i_eoff, s_size;
+ lock_kernel();
+
info = kzalloc(sizeof(*info), GFP_KERNEL);
- if (!info)
+ if (!info) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = info;
sb_set_blocksize(s, BFS_BSIZE);
@@ -463,6 +467,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
kfree(info->si_imap);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return -EIO;
}
@@ -484,12 +489,14 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
}
dump_imap("read_super", s);
mutex_init(&info->bfs_lock);
+ unlock_kernel();
return 0;
out:
brelse(bh);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c4e8353..ca0e22d 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -695,9 +695,13 @@ static int bm_fill_super(struct super_block * sb, void * data, int silent)
[3] = {"register", &bm_register_operations, S_IWUSR},
/* last one */ {""}
};
- int err = simple_fill_super(sb, 0x42494e4d, bm_files);
+ int err;
+
+ lock_kernel();
+ err = simple_fill_super(sb, 0x42494e4d, bm_files);
if (!err)
sb->s_op = &s_ops;
+ unlock_kernel();
return err;
}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 752a546..e5cd2cf 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -480,13 +480,17 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
fmode_t mode = FMODE_READ;
int error = 0;
+ lock_kernel();
+
if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
error = btrfs_parse_early_options(data, mode, fs_type,
&subvol_name, &fs_devices);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
error = btrfs_scan_one_device(dev_name, mode, fs_type, &fs_devices);
if (error)
@@ -555,6 +559,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
mnt->mnt_root = root;
kfree(subvol_name);
+ unlock_kernel();
return 0;
error_s:
@@ -563,6 +568,7 @@ error_close_devices:
btrfs_close_devices(fs_devices);
error_free_subvol_name:
kfree(subvol_name);
+ unlock_kernel();
return error;
}
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 9a5e4f5..09ccb9d 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -596,22 +596,30 @@ cifs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
int rc;
- struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
+ struct super_block *sb;
+
+ lock_kernel();
+
+ sb = sget(fs_type, NULL, set_anon_super, NULL);
cFYI(1, ("Devname: %s flags: %d ", dev_name, flags));
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
sb->s_flags = flags;
rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
if (rc) {
deactivate_locked_super(sb);
+ unlock_kernel();
return rc;
}
sb->s_flags |= MS_ACTIVE;
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 830f51a..d081fc5 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -147,6 +147,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
int error;
int idx;
+ lock_kernel();
+
idx = get_device_index((struct coda_mount_data *) data);
/* Ignore errors in data, for backward compatibility */
@@ -158,11 +160,13 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
vc = &coda_comms[idx];
if (!vc->vc_inuse) {
printk("coda_read_super: No pseudo device\n");
+ unlock_kernel();
return -EINVAL;
}
if ( vc->vc_sb ) {
printk("coda_read_super: Device already mounted\n");
+ unlock_kernel();
return -EBUSY;
}
@@ -196,7 +200,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root = d_alloc_root(root);
if (!sb->s_root)
goto error;
- return 0;
+ unlock_kernel();
+ return 0;
error:
if (root)
@@ -204,6 +209,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
if (vc)
vc->vc_sb = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 8421cea..5b2e06e 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -71,6 +71,8 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = CONFIGFS_MAGIC;
@@ -87,6 +89,7 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
inc_nlink(inode);
} else {
pr_debug("configfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -94,12 +97,14 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
config_group_init(&configfs_root_group);
configfs_root_group.cg_item.ci_dentry = root;
root->d_fsdata = &configfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index dd3634e..13e696a 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -227,11 +227,15 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
struct cramfs_sb_info *sbi;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_RDONLY;
sbi = kzalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* Invalidate the read buffers on mount: think disk change.. */
@@ -308,10 +312,12 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
iput(root);
goto out;
}
+ unlock_kernel();
return 0;
out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index d5f8c96..e206eef 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -24,6 +24,7 @@
#include <linux/parser.h>
#include <linux/fsnotify.h>
#include <linux/seq_file.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define DEVPTS_DEFAULT_MODE 0600
/*
@@ -363,17 +364,23 @@ static int devpts_get_sb(struct file_system_type *fs_type,
struct pts_mount_opts opts;
struct super_block *s;
+ lock_kernel();
+
error = parse_mount_options(data, PARSE_MOUNT, &opts);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
if (opts.newinstance)
s = sget(fs_type, NULL, set_anon_super, NULL);
else
s = sget(fs_type, compare_init_pts_sb, set_anon_super, NULL);
- if (IS_ERR(s))
+ if (IS_ERR(s)) {
+ unlock_kernel();
return PTR_ERR(s);
+ }
if (!s->s_root) {
s->s_flags = flags;
@@ -391,6 +398,7 @@ static int devpts_get_sb(struct file_system_type *fs_type,
if (error)
goto out_dput;
+ unlock_kernel();
return 0;
out_dput:
@@ -398,6 +406,7 @@ out_dput:
out_undo_sget:
deactivate_locked_super(s);
+ unlock_kernel();
return error;
}
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index c6ac85d..fdc7bda 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -600,6 +600,8 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
int rc;
struct super_block *sb;
+ lock_kernel();
+
rc = get_sb_nodev(fs_type, flags, raw_data, ecryptfs_fill_super, mnt);
if (rc < 0) {
printk(KERN_ERR "Getting sb failed; rc = [%d]\n", rc);
@@ -621,6 +623,7 @@ out_abort:
dput(sb->s_root); /* aka mnt->mnt_root, as set by get_sb_nodev() */
deactivate_locked_super(sb);
out:
+ unlock_kernel();
return rc;
}
diff --git a/fs/efs/super.c b/fs/efs/super.c
index f049428..0981141 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -249,9 +249,13 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
struct inode *root;
int ret = -EINVAL;
- sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
- if (!sb)
+ lock_kernel();
+
+ sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
+ if (!sb) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sb;
s->s_magic = EFS_SUPER_MAGIC;
@@ -319,12 +323,14 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
goto out_no_fs;
}
+ unlock_kernel();
return 0;
out_no_fs_ul:
out_no_fs:
s->s_fs_info = NULL;
kfree(sb);
+ unlock_kernel();
return ret;
}
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 9f500de..ea045b8 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -297,9 +297,13 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
struct osd_obj_id obj;
int ret;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* use mount options to fill superblock */
@@ -399,6 +403,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
out:
if (or)
osd_end_request(or);
+ unlock_kernel();
return ret;
free_sbi:
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 1a9ffee..5af1775 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -745,15 +745,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
+ err = -ENOMEM;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
- return -ENOMEM;
+ goto failed_unlock;
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
- return -ENOMEM;
+ goto failed_unlock;
}
sb->s_fs_info = sbi;
sbi->s_sb_block = sb_block;
@@ -1063,6 +1066,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
ext2_warning(sb, __func__,
"mounting ext3 filesystem as ext2");
ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+ unlock_kernel();
return 0;
cantfind_ext2:
@@ -1086,6 +1090,8 @@ failed_sbi:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
+failed_unlock:
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 7a520a8..38261a5 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1568,14 +1568,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -1992,6 +1997,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
"writeback");
lock_kernel();
+ unlock_kernel();
return 0;
cantfind_ext3:
@@ -2022,6 +2028,7 @@ out_fail:
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
lock_kernel();
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 312211e..9db81d2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2328,14 +2328,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
int err;
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -2913,7 +2918,6 @@ no_journal:
ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr);
- lock_kernel();
return 0;
cantfind_ext4:
@@ -2959,7 +2963,6 @@ out_fail:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
- lock_kernel();
return ret;
}
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index bbc94ae..31dd072 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -662,12 +662,16 @@ static int msdos_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
sb->s_flags |= MS_NOATIME;
sb->s_root->d_op = &msdos_dentry_operations;
+ unlock_kernel();
return 0;
}
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index f565f24..12961b8 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -1044,15 +1044,19 @@ static int vfat_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &vfat_dir_inode_operations, 1);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
if (MSDOS_SB(sb)->options.name_check != 's')
sb->s_root->d_op = &vfat_ci_dentry_ops;
else
sb->s_root->d_op = &vfat_dentry_ops;
+ unlock_kernel();
return 0;
}
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index 1e8af93..b8b7821 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -148,7 +148,7 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data)
* The superblock on success, else %NULL.
*
* Locking:
- * We are under the bkl and @sbp->s_lock.
+ * We are under @sbp->s_lock.
*/
static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
{
@@ -159,11 +159,14 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
struct inode *root;
int ret = -EINVAL;
+ lock_kernel();
+
sbp->s_flags |= MS_RDONLY;
infp = kzalloc(sizeof(*infp), GFP_KERNEL);
if (!infp) {
printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -236,6 +239,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
goto out_free_ilist;
}
+ unlock_kernel();
return 0;
out_free_ilist:
@@ -245,6 +249,7 @@ out_free_ilist:
out:
brelse(bp);
kfree(infp);
+ unlock_kernel();
return ret;
}
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 3773fd6..8d769f7 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -10,6 +10,7 @@
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define FUSE_CTL_SUPER_MAGIC 0x65735543
@@ -297,9 +298,13 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
struct fuse_conn *fc;
int err;
+ lock_kernel();
+
err = simple_fill_super(sb, FUSE_CTL_SUPER_MAGIC, &empty_descr);
- if (err)
+ if (err) {
+ unlock_kernel();
return err;
+ }
mutex_lock(&fuse_mutex);
BUG_ON(fuse_control_sb);
@@ -309,10 +314,12 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
if (err) {
fuse_control_sb = NULL;
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return err;
}
}
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return 0;
}
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1a822ce..5690279 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -20,6 +20,7 @@
#include <linux/random.h>
#include <linux/sched.h>
#include <linux/exportfs.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
MODULE_DESCRIPTION("Filesystem in Userspace");
@@ -919,6 +920,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
int err;
int is_bdev = sb->s_bdev != NULL;
+ lock_kernel();
+
err = -EINVAL;
if (sb->s_flags & MS_MANDLOCK)
goto err;
@@ -1022,6 +1025,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
fuse_send_init(fc, init_req);
+ unlock_kernel();
return 0;
err_unlock:
@@ -1036,6 +1040,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
err_fput:
fput(file);
err:
+ unlock_kernel();
return err;
}
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 52fb6c0..76415fe 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1120,9 +1120,12 @@ static int fill_super(struct super_block *sb, void *data, int silent)
struct gfs2_holder mount_gh;
int error;
+ lock_kernel();
+
sdp = init_sbd(sb);
if (!sdp) {
printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -1211,6 +1214,7 @@ static int fill_super(struct super_block *sb, void *data, int silent)
gfs2_glock_dq_uninit(&mount_gh);
gfs2_online_uevent(sdp);
+ unlock_kernel();
return 0;
fail_threads:
@@ -1240,6 +1244,7 @@ fail:
gfs2_delete_debugfs_file(sdp);
kfree(sdp);
sb->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
@@ -1268,10 +1273,12 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
struct path path;
int error;
+ lock_kernel();
error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
if (error) {
printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
dev_name, error);
+ unlock_kernel();
return error;
}
s = sget(&gfs2_fs_type, test_meta_super, set_meta_super,
@@ -1279,11 +1286,13 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
path_put(&path);
if (IS_ERR(s)) {
printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
+ unlock_kernel();
return PTR_ERR(s);
}
sdp = s->s_fs_info;
mnt->mnt_sb = s;
mnt->mnt_root = dget(sdp->sd_master_dir);
+ unlock_kernel();
return 0;
}
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index f7fcbe4..a2e19ff 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -381,9 +381,13 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root_inode;
int res;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -429,6 +433,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root->d_op = &hfs_dentry_operations;
/* everything's okay */
+ unlock_kernel();
return 0;
bail_iput:
@@ -437,6 +442,7 @@ bail_no_root:
printk(KERN_ERR "hfs: get root inode failed.\n");
bail:
hfs_mdb_put(sb);
+ unlock_kernel();
return res;
}
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 43022f3..824f57a 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -312,9 +312,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
struct nls_table *nls = NULL;
int err = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -459,11 +463,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
out:
unload_nls(sbi->nls);
sbi->nls = nls;
+ unlock_kernel();
return 0;
cleanup:
hfsplus_put_super(sb);
unload_nls(nls);
+ unlock_kernel();
return err;
}
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 032604e..5eb2c26 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -968,6 +968,8 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
char *host_root_path, *req_root = d;
int err;
+ lock_kernel();
+
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = HOSTFS_SUPER_MAGIC;
@@ -1016,6 +1018,7 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
goto out;
}
+ unlock_kernel();
return 0;
out_put:
@@ -1023,6 +1026,7 @@ out_put:
out_free:
kfree(host_root_path);
out:
+ unlock_kernel();
return err;
}
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2feaa0..a7b348a 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -477,11 +477,15 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
int o;
+ lock_kernel();
+
save_mount_options(s, options);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
sbi->sb_bmp_dir = NULL;
@@ -666,6 +670,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
root->i_blocks = 5;
hpfs_brelse4(&qbh);
}
+ unlock_kernel();
return 0;
bail4: brelse(bh2);
@@ -677,6 +682,7 @@ bail0:
kfree(sbi->sb_cp_table);
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index a5089a6..6263973 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -712,6 +712,8 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
struct vfsmount *proc_mnt;
int err = -ENOENT;
+ lock_kernel();
+
proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
if (IS_ERR(proc_mnt))
goto out;
@@ -731,6 +733,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
if (!sb->s_root)
goto out_iput;
+ unlock_kernel();
return 0;
out_iput:
@@ -738,6 +741,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
out_mntput:
mntput(proc_mnt);
out:
+ unlock_kernel();
return(err);
}
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 87a1258..53be2b9 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -32,6 +32,7 @@
#include <linux/security.h>
#include <linux/ima.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -824,6 +825,7 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
struct hugetlbfs_config config;
struct hugetlbfs_sb_info *sbinfo;
+ lock_kernel();
save_mount_options(sb, data);
config.nr_blocks = -1; /* No limit on size by default */
@@ -833,12 +835,16 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
config.mode = 0755;
config.hstate = &default_hstate;
ret = hugetlbfs_parse_options(data, &config);
- if (ret)
+ if (ret) {
+ unlock_kernel();
return ret;
+ }
sbinfo = kmalloc(sizeof(struct hugetlbfs_sb_info), GFP_KERNEL);
- if (!sbinfo)
+ if (!sbinfo) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbinfo;
sbinfo->hstate = config.hstate;
spin_lock_init(&sbinfo->stat_lock);
@@ -863,9 +869,11 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
goto out_free;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
out_free:
kfree(sbinfo);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 6b4dcd4..7c501d5 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -571,11 +571,15 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
int table, error = -EINVAL;
unsigned int vol_desc_start;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
if (!parse_options((char *)data, &opt))
@@ -895,6 +899,7 @@ root_found:
kfree(opt.iocharset);
+ unlock_kernel();
return 0;
/*
@@ -934,6 +939,7 @@ out_freesbi:
kfree(opt.iocharset);
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 9a80e8e..622bd51 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -148,14 +148,19 @@ static const struct super_operations jffs2_super_operations =
static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
{
struct jffs2_sb_info *c;
+ int ret;
+
+ lock_kernel();
D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():"
" New superblock for device %d (\"%s\")\n",
sb->s_mtd->index, sb->s_mtd->name));
c = kzalloc(sizeof(*c), GFP_KERNEL);
- if (!c)
+ if (!c) {
+ unlock_kernel();
return -ENOMEM;
+ }
c->mtd = sb->s_mtd;
c->os_priv = sb;
@@ -177,7 +182,9 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
#endif
- return jffs2_do_fill_super(sb, data, silent);
+ ret = jffs2_do_fill_super(sb, data, silent);
+ unlock_kernel();
+ return ret;
}
static int jffs2_get_sb(struct file_system_type *fs_type,
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 2234c73..329d7b6 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -425,14 +425,20 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
s64 newLVSize = 0;
int flag, ret = -EINVAL;
+ lock_kernel();
+
jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
- if (!new_valid_dev(sb->s_bdev->bd_dev))
+ if (!new_valid_dev(sb->s_bdev->bd_dev)) {
+ unlock_kernel();
return -EOVERFLOW;
+ }
sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
sbi->sb = sb;
sbi->uid = sbi->gid = sbi->umask = -1;
@@ -442,6 +448,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
sbi->flag = flag;
@@ -452,6 +459,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (newLVSize) {
printk(KERN_ERR "resize option for remount only\n");
+ unlock_kernel();
return -EINVAL;
}
@@ -527,6 +535,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
#endif
sb->s_time_gran = 1;
+ unlock_kernel();
return 0;
out_no_root:
@@ -548,6 +557,7 @@ out_kfree:
if (sbi->nls_tab)
unload_nls(sbi->nls_tab);
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/libfs.c b/fs/libfs.c
index 219576c..3484040 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -11,6 +11,7 @@
#include <linux/exportfs.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -422,6 +423,8 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
struct dentry *dentry;
int i;
+ lock_kernel();
+
s->s_blocksize = PAGE_CACHE_SIZE;
s->s_blocksize_bits = PAGE_CACHE_SHIFT;
s->s_magic = magic;
@@ -429,8 +432,10 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
s->s_time_gran = 1;
inode = new_inode(s);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
/*
* because the root inode is 1, the files array must not contain an
* entry at index 1
@@ -444,6 +449,7 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
for (i = 0; !files->name || files->name[0]; i++, files++) {
@@ -469,10 +475,12 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
d_add(dentry, inode);
}
s->s_root = root;
+ unlock_kernel();
return 0;
out:
d_genocide(root);
dput(root);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 74ea82d..b8aa0a6 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -147,9 +147,13 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
struct minix_sb_info *sbi;
int ret = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
BUILD_BUG_ON(32 != sizeof (struct minix_inode));
@@ -265,6 +269,7 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
else if (sbi->s_mount_state & MINIX_ERROR_FS)
printk("MINIX-fs: mounting file system with errors, "
"running fsck is recommended\n");
+ unlock_kernel();
return 0;
out_iput:
@@ -314,6 +319,7 @@ out_bad_sb:
out:
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/namespace.c b/fs/namespace.c
index bdc3cb4..3f95497 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1647,9 +1647,7 @@ static int do_new_mount(struct path *path, char *type, int flags,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- lock_kernel();
mnt = do_kern_mount(type, flags, name, data);
- unlock_kernel();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index cf98da1..a020d86 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -445,10 +445,14 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
#endif
struct ncp_entry_info finfo;
+ lock_kernel();
+
data.wdog_pid = NULL;
server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
- if (!server)
+ if (!server) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = server;
error = -EFAULT;
@@ -695,6 +699,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
if (!sb->s_root)
goto out_no_root;
sb->s_root->d_op = &ncp_root_dentry_operations;
+ unlock_kernel();
return 0;
out_no_root:
@@ -729,6 +734,7 @@ out:
put_pid(data.wdog_pid);
sb->s_fs_info = NULL;
kfree(server);
+ unlock_kernel();
return error;
}
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 90be551..1f97aad 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1877,6 +1877,8 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
options->version <= 6))))
return 0;
+ lock_kernel();
+
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
@@ -2184,6 +2186,7 @@ out:
out_free_fh:
kfree(mntfh);
kfree(data);
+ unlock_kernel();
return error;
out_err_nosb:
@@ -2227,6 +2230,8 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs_xdev_get_sb()\n");
/* create a new volume representation */
@@ -2281,17 +2286,20 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs_xdev_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2475,6 +2483,8 @@ static int nfs4_remote_get_sb(struct file_system_type *fs_type,
};
int error = -ENOMEM;
+ lock_kernel();
+
mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
if (data == NULL || mntfh == NULL)
goto out_free_fh;
@@ -2534,6 +2544,7 @@ out:
security_free_mnt_opts(&data->lsm_opts);
out_free_fh:
kfree(mntfh);
+ unlock_kernel();
return error;
out_free:
@@ -2794,6 +2805,8 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
/* create a new volume representation */
@@ -2847,17 +2860,20 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs4_referral_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2873,6 +2889,8 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
struct vfsmount *root_mnt;
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
export_path = data->mnt_path;
@@ -2890,6 +2908,7 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
out:
dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error,
error != 0 ? " [error]" : "");
+ unlock_kernel();
return error;
}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 5c01fc1..dcaef52 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1347,7 +1347,12 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
#endif
/* last one */ {""}
};
- return simple_fill_super(sb, 0x6e667364, nfsd_files);
+ int ret;
+
+ lock_kernel();
+ ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
+ unlock_kernel();
+ return ret;
}
static int nfsd_get_sb(struct file_system_type *fs_type,
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 644e667..3448ec3 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1059,9 +1059,13 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
struct the_nilfs *nilfs;
int err, need_to_close = 1;
+ lock_kernel();
+
sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type);
- if (IS_ERR(sd.bdev))
+ if (IS_ERR(sd.bdev)) {
+ unlock_kernel();
return PTR_ERR(sd.bdev);
+ }
/*
* To get mount instance using sget() vfs-routine, NILFS needs
@@ -1142,6 +1146,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
if (need_to_close)
close_bdev_exclusive(sd.bdev, flags);
simple_set_mnt(mnt, s);
+ unlock_kernel();
return 0;
failed_unlock:
@@ -1150,6 +1155,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
failed:
close_bdev_exclusive(sd.bdev, flags);
+ unlock_kernel();
return err;
cancel_new:
@@ -1163,6 +1169,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
* We must finish all post-cleaning before this call;
* put_nilfs() needs the block device.
*/
+ unlock_kernel();
return err;
}
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 80b0477..ab09c02 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2723,6 +2723,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
struct inode *tmp_ino;
int blocksize, result;
+ lock_kernel();
+
/*
* We do a pretty difficult piece of bootstrap by reading the
* MFT (and other metadata) from disk into memory. We'll only
@@ -2746,6 +2748,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Allocation of NTFS volume structure "
"failed. Aborting mount...");
lockdep_on();
+ unlock_kernel();
return -ENOMEM;
}
/* Initialize ntfs_volume structure. */
@@ -2933,6 +2936,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
sb->s_export_op = &ntfs_export_ops;
lock_kernel();
lockdep_on();
+ unlock_kernel();
return 0;
}
ntfs_error(sb, "Failed to allocate root directory.");
@@ -3053,6 +3057,7 @@ err_out_now:
kfree(vol);
ntfs_debug("Failed, returning -EINVAL.");
lockdep_on();
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ocfs2/dlm/dlmfs.c b/fs/ocfs2/dlm/dlmfs.c
index 02bf178..58ce813 100644
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlm/dlmfs.c
@@ -528,21 +528,27 @@ static int dlmfs_fill_super(struct super_block * sb,
struct inode * inode;
struct dentry * root;
+ lock_kernel();
+
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = DLMFS_MAGIC;
sb->s_op = &dlmfs_ops;
inode = dlmfs_get_root_inode(sb);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index c0e48ae..fab815f 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -986,6 +986,8 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
char nodestr[8];
struct ocfs2_blockcheck_stats stats;
+ lock_kernel();
+
mlog_entry("%p, %p, %i", sb, data, silent);
if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
@@ -1172,6 +1174,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
atomic_set(&osb->vol_state, VOLUME_DISABLED);
wake_up(&osb->osb_mount_event);
mlog_exit(status);
+ unlock_kernel();
return status;
}
}
@@ -1186,6 +1189,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
ocfs2_orphan_scan_start(osb);
mlog_exit(status);
+ unlock_kernel();
return status;
read_super_error:
@@ -1201,6 +1205,7 @@ read_super_error:
}
mlog_exit(status);
+ unlock_kernel();
return status;
}
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index f3b7c15..ddfbb22 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -416,11 +416,15 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
sector_t start;
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, (char *) data);
sbi = kzalloc(sizeof(struct omfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -525,6 +529,7 @@ out_brelse_bh2:
out_brelse_bh:
brelse(bh);
end:
+ unlock_kernel();
return ret;
}
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index ffcd04f..50dc4be 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -386,6 +386,8 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
struct op_inode_info *oi;
int ret;
+ lock_kernel();
+
s->s_flags |= MS_NOATIME;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
@@ -405,6 +407,7 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
s->s_root = d_alloc_root(root_inode);
if (!s->s_root)
goto out_no_root_dentry;
+ unlock_kernel();
return 0;
out_no_root_dentry:
@@ -412,6 +415,7 @@ out_no_root_dentry:
ret = -ENOMEM;
out_no_root:
printk("openprom_fill_super: get root inode failed\n");
+ unlock_kernel();
return ret;
}
diff --git a/fs/proc/root.c b/fs/proc/root.c
index b080b79..6384680 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -18,6 +18,7 @@
#include <linux/bitops.h>
#include <linux/mount.h>
#include <linux/pid_namespace.h>
+#include <linux/smp_lock.h> /* For lock_kernel() only */
#include "internal.h"
@@ -43,6 +44,8 @@ static int proc_get_sb(struct file_system_type *fs_type,
struct pid_namespace *ns;
struct proc_inode *ei;
+ lock_kernel();
+
if (proc_mnt) {
/* Seed the root directory with a pid so it doesn't need
* to be special in base.c. I would do this earlier but
@@ -60,14 +63,17 @@ static int proc_get_sb(struct file_system_type *fs_type,
ns = current->nsproxy->pid_ns;
sb = sget(fs_type, proc_test_super, proc_set_super, ns);
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
if (!sb->s_root) {
sb->s_flags = flags;
err = proc_fill_super(sb);
if (err) {
deactivate_locked_super(sb);
+ unlock_kernel();
return err;
}
@@ -83,6 +89,7 @@ static int proc_get_sb(struct file_system_type *fs_type,
}
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index d2cd179..18640ce 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -253,9 +253,13 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
struct qnx4_sb_info *qs;
int ret = -EINVAL;
+ lock_kernel();
+
qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
- if (!qs)
+ if (!qs) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = qs;
sb_set_blocksize(s, QNX4_BLOCK_SIZE);
@@ -303,6 +307,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
brelse(bh);
+ unlock_kernel();
return 0;
outi:
@@ -312,6 +317,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
outnobh:
kfree(qs);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index a6090aa..9b3983f 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -35,6 +35,7 @@
#include <linux/sched.h>
#include <linux/parser.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
#include "internal.h"
@@ -220,6 +221,8 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
struct dentry *root;
int err;
+ lock_kernel();
+
save_mount_options(sb, data);
fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL);
@@ -253,11 +256,13 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
goto fail;
}
+ unlock_kernel();
return 0;
fail:
kfree(fsi);
sb->s_fs_info = NULL;
iput(inode);
+ unlock_kernel();
return err;
}
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index f0ad05f..f32bf62 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1608,6 +1608,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
char *qf_names[MAXQUOTAS] = {};
unsigned int qfmt = 0;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
@@ -1852,6 +1854,7 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
init_waitqueue_head(&(sbi->s_wait));
spin_lock_init(&sbi->bitmap_lock);
+ unlock_kernel();
return (0);
error:
@@ -1872,6 +1875,7 @@ error:
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return errval;
}
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index c117fa8..7342617 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -468,6 +468,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
size_t len;
int ret;
+ lock_kernel();
+
#ifdef CONFIG_BLOCK
if (!sb->s_mtd) {
sb_set_blocksize(sb, ROMBSIZE);
@@ -484,8 +486,10 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
/* read the image superblock and check it */
rsb = kmalloc(512, GFP_KERNEL);
- if (!rsb)
+ if (!rsb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = (void *) 512;
ret = romfs_dev_read(sb, 0, rsb, 512);
@@ -535,15 +539,18 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
if (!sb->s_root)
goto error_i;
+ unlock_kernel();
return 0;
error_i:
iput(root);
error:
+ unlock_kernel();
return -EINVAL;
error_rsb_inval:
ret = -EINVAL;
error_rsb:
+ unlock_kernel();
return ret;
}
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 1c4c8f0..c3c9044 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -500,6 +500,8 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
void *mem;
static int warn_count;
+ lock_kernel();
+
if (warn_count < 5) {
warn_count++;
printk(KERN_EMERG "smbfs is deprecated and will be removed"
@@ -615,6 +617,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
smb_new_dentry(sb->s_root);
+ unlock_kernel();
return 0;
out_no_root:
@@ -635,9 +638,11 @@ out_wrong_data:
out_no_data:
printk(KERN_ERR "smb_fill_super: missing data argument\n");
out_fail:
+ unlock_kernel();
return -EINVAL;
out_no_server:
printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 6c197ef..23cea83 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -78,11 +78,14 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
u64 lookup_table_start;
int err;
+ lock_kernel();
+
TRACE("Entered squashfs_fill_superblock\n");
sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL);
if (sb->s_fs_info == NULL) {
ERROR("Failed to allocate squashfs_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
msblk = sb->s_fs_info;
@@ -286,6 +289,7 @@ allocate_root:
TRACE("Leaving squashfs_fill_super\n");
kfree(sblk);
+ unlock_kernel();
return 0;
failed_mount:
@@ -299,12 +303,14 @@ failed_mount:
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
kfree(sblk);
+ unlock_kernel();
return err;
failure:
kfree(msblk->stream.workspace);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 4974995..2e5a870 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include "sysfs.h"
@@ -45,6 +46,8 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = SYSFS_MAGIC;
@@ -58,6 +61,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
mutex_unlock(&sysfs_mutex);
if (!inode) {
pr_debug("sysfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -66,10 +70,12 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
root->d_fsdata = &sysfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/sysv/super.c b/fs/sysv/super.c
index 5a903da..145d949 100644
--- a/fs/sysv/super.c
+++ b/fs/sysv/super.c
@@ -357,7 +357,9 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
struct sysv_sb_info *sbi;
unsigned long blocknr;
int size = 0, i;
-
+
+ lock_kernel();
+
BUILD_BUG_ON(1024 != sizeof (struct xenix_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv4_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv2_super_block));
@@ -365,8 +367,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
BUILD_BUG_ON(64 != sizeof (struct sysv_inode));
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -409,8 +413,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
if (bh && bh1) {
sbi->s_bh1 = bh1;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, size))
+ if (complete_read_super(sb, silent, size)) {
+ unlock_kernel();
return 0;
+ }
}
brelse(bh1);
@@ -419,6 +425,7 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
printk("oldfs: cannot read superblock\n");
failed:
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
Eunknown:
@@ -442,14 +449,18 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
struct v7_super_block *v7sb;
struct sysv_inode *v7i;
+ lock_kernel();
+
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad i-node size");
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -487,13 +498,16 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_bh1 = bh;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, 1))
+ if (complete_read_super(sb, silent, 1)) {
+ unlock_kernel();
return 0;
+ }
failed:
brelse(bh2);
brelse(bh);
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 333e181..04a0fc9 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2029,6 +2029,8 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
struct super_block *sb;
int err;
+ lock_kernel();
+
dbg_gen("name %s, flags %#x", name, flags);
/*
@@ -2040,6 +2042,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
if (IS_ERR(ubi)) {
ubifs_err("cannot open \"%s\", error %d",
name, (int)PTR_ERR(ubi));
+ unlock_kernel();
return PTR_ERR(ubi);
}
ubi_get_volume_info(ubi, &vi);
@@ -2077,12 +2080,14 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
ubi_close_volume(ubi);
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
out_deact:
deactivate_locked_super(sb);
out_close:
ubi_close_volume(ubi);
+ unlock_kernel();
return err;
}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9d1b8c2..fa6f8db 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1866,6 +1866,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
struct kernel_lb_addr rootdir, fileset;
struct udf_sb_info *sbi;
+ lock_kernel();
+
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
uopt.uid = -1;
uopt.gid = -1;
@@ -1874,8 +1876,10 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
uopt.dmode = UDF_INVALID_MODE;
sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -2021,6 +2025,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
goto error_out;
}
sb->s_maxbytes = MAX_LFS_FILESIZE;
+ unlock_kernel();
return 0;
error_out:
@@ -2041,6 +2046,7 @@ error_out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 5faed79..31ad198 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -646,6 +646,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
unsigned maxsymlen;
int ret = -EINVAL;
+ lock_kernel();
+
uspi = NULL;
ubh = NULL;
flags = 0;
@@ -1107,6 +1109,7 @@ magic_found:
goto failed;
UFSD("EXIT\n");
+ unlock_kernel();
return 0;
dalloc_failed:
@@ -1118,10 +1121,12 @@ failed:
kfree(sbi);
sb->s_fs_info = NULL;
UFSD("EXIT (FAILED)\n");
+ unlock_kernel();
return ret;
failed_nomem:
UFSD("EXIT (NOMEM)\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 18a4b8e..7426166 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1412,6 +1412,8 @@ xfs_fs_fill_super(
int flags = 0, error = ENOMEM;
char *mtpt = NULL;
+ lock_kernel();
+
mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
if (!mp)
goto out;
@@ -1506,6 +1508,7 @@ xfs_fs_fill_super(
kfree(mtpt);
xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
+ unlock_kernel();
return 0;
out_filestream_unmount:
@@ -1522,6 +1525,7 @@ xfs_fs_fill_super(
kfree(mtpt);
kfree(mp);
out:
+ unlock_kernel();
return -error;
fail_vnrele:
--
1.6.4.2
^ permalink raw reply related [flat|nested] 70+ messages in thread* [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
@ 2009-11-02 10:04 ` Jan Blunck
0 siblings, 0 replies; 70+ messages in thread
From: Jan Blunck @ 2009-11-02 10:04 UTC (permalink / raw)
To: linux-fsdevel
Cc: Latchesar Ionkov, Andreas Dilger, Anders Larsen, J. Bruce Fields,
Christoph Hellwig, Alessio Igor Bogani, Arte m Bityutskiy,
James Morris, Petr Vandrovec, KOSAKI Motohiro, Abhishek Kulkarni,
Matthew Wilcox, Eric Van Hensbergen, Al Viro, Matt Mackall,
Thomas Gleixner, Dustin Kirkland, Tigran A. Aivazian,
linux-kernel, Sukadev Bhattiprolu, Chuck Lever, Tejun Heo,
Serge Hallyn, Csaba Henk, Wu Fengguang, Roman Zippel,
Eric Sesterhenn, Coly Li, co, Clemens Ladisch, KONISHI Ryusuke,
Yan Zheng, Bernd Schmidt, Eric Sandeen, Marcin Slusarz,
Wolfgang Illmeyer, Phillip Lougher, Mark Fasheh, reiserfs-devel,
osd-dev, Sage Weil, Andrew Morton, OGAWA Hirofumi, autofs,
Theodore Ts'o, linux-ntfs-dev, David VomLehn, Benny Halevy,
Tyler Hicks, Adrian Hunter, Qinghuang Feng, users,
Trond Myklebust, linux-mtd, Jens Axboe, Dave Kleikamp, linux-afs,
Ian Kent, Nick Piggin, Jeff Layton, Miklos Szeredi,
Sergey S. Kostyliov, Joel Becker, Alex Elder, Jiro SEKIBA,
linux-ext4, linux-cifs-client, Alexey Dobriyan, Mel Gorman,
Jeff Dike, ecryptfs-devel, Felix Blyakher, xfs, xfs-masters,
Pekka Enberg, Chris Mason, codalist, Jan Harkes, linux-nfs,
Greg Kroah-Hartman, Roel Kluin, da, Steve French, Julia Lawall,
ocfs2-devel, Niv Sardi, jfs-discussion, Jan Kara, Neil Brown,
Jeff Mahoney, Bob Copeland, William Irwin, David Howells,
Anton Altaparmakov, Mikulas Patocka, samba-technical, Jan Blunck,
Eric W. Biederman, cluster-devel, Jeff Moyer, Boaz Harrosh,
v9fs-developer, Sunil Mushran, Evgeniy Dushistov,
user-mode-linux-devel, fuse-devel, Masayuki Hamaguchi,
user-mode-linux-user, Steven Whitehouse, Alan Cox, Denis Karpov,
Ron Minnich, David Woodhouse, linux-karma-devel, linux-btrfs
I've read through all the code formerly covered by the BKL inside
do_kern_mount() and have satisfied myself that it doesn't need the BKL
any more.
do_kern_mount() is already called without the BKL when mounting the rootfs
and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called
from various places without BKL: simple_pin_fs(), nfs_do_clone_mount()
through nfs_follow_mountpoint(), afs_mntpt_do_automount() through
afs_mntpt_follow_link(). Both later functions are actually the filesystems
follow_link inode operation. vfs_kern_mount() is calling the specified
get_sb function and lets the filesystem do its job by calling the given
fill_super function.
Therefore I think it is safe to push down the BKL from the VFS to the
low-level filesystems get_sb/fill_super operation.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Matthew Wilcox <matthew@wil.cx>
---
fs/9p/vfs_super.c | 9 ++++++++-
fs/adfs/super.c | 8 +++++++-
fs/affs/super.c | 9 ++++++++-
fs/afs/super.c | 5 +++++
fs/autofs4/inode.c | 4 ++++
fs/befs/linuxvfs.c | 4 ++++
fs/bfs/inode.c | 9 ++++++++-
fs/binfmt_misc.c | 6 +++++-
fs/btrfs/super.c | 8 +++++++-
fs/cifs/cifsfs.c | 12 ++++++++++--
fs/coda/inode.c | 8 +++++++-
fs/configfs/mount.c | 5 +++++
fs/cramfs/inode.c | 8 +++++++-
fs/devpts/inode.c | 13 +++++++++++--
fs/ecryptfs/main.c | 3 +++
fs/efs/super.c | 10 ++++++++--
fs/exofs/super.c | 7 ++++++-
fs/ext2/super.c | 10 ++++++++--
fs/ext3/super.c | 9 ++++++++-
fs/ext4/super.c | 9 ++++++---
fs/fat/namei_msdos.c | 6 +++++-
fs/fat/namei_vfat.c | 6 +++++-
fs/freevxfs/vxfs_super.c | 7 ++++++-
fs/fuse/control.c | 9 ++++++++-
fs/fuse/inode.c | 5 +++++
fs/gfs2/ops_fstype.c | 9 +++++++++
fs/hfs/super.c | 8 +++++++-
fs/hfsplus/super.c | 8 +++++++-
fs/hostfs/hostfs_kern.c | 4 ++++
fs/hpfs/super.c | 8 +++++++-
fs/hppfs/hppfs.c | 4 ++++
fs/hugetlbfs/inode.c | 12 ++++++++++--
fs/isofs/inode.c | 8 +++++++-
fs/jffs2/super.c | 11 +++++++++--
fs/jfs/super.c | 14 ++++++++++++--
fs/libfs.c | 10 +++++++++-
fs/minix/inode.c | 8 +++++++-
fs/namespace.c | 2 --
fs/ncpfs/inode.c | 8 +++++++-
fs/nfs/super.c | 19 +++++++++++++++++++
fs/nfsd/nfsctl.c | 7 ++++++-
fs/nilfs2/super.c | 9 ++++++++-
fs/ntfs/super.c | 5 +++++
fs/ocfs2/dlm/dlmfs.c | 8 +++++++-
fs/ocfs2/super.c | 5 +++++
fs/omfs/inode.c | 7 ++++++-
fs/openpromfs/inode.c | 4 ++++
fs/proc/root.c | 9 ++++++++-
fs/qnx4/inode.c | 8 +++++++-
fs/ramfs/inode.c | 5 +++++
fs/reiserfs/super.c | 4 ++++
fs/romfs/super.c | 9 ++++++++-
fs/smbfs/inode.c | 5 +++++
fs/squashfs/super.c | 6 ++++++
fs/sysfs/mount.c | 6 ++++++
fs/sysv/super.c | 24 +++++++++++++++++++-----
fs/ubifs/super.c | 5 +++++
fs/udf/super.c | 8 +++++++-
fs/ufs/super.c | 5 +++++
fs/xfs/linux-2.6/xfs_super.c | 4 ++++
60 files changed, 412 insertions(+), 53 deletions(-)
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 14a8644..4156a0c 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -106,11 +106,15 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
struct p9_fid *fid;
int retval = 0;
+ lock_kernel();
+
P9_DPRINTK(P9_DEBUG_VFS, " \n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
- if (!v9ses)
+ if (!v9ses) {
+ unlock_kernel();
return -ENOMEM;
+ }
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
@@ -155,6 +159,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
free_stat:
@@ -167,12 +172,14 @@ clunk_fid:
close_session:
v9fs_session_close(v9ses);
kfree(v9ses);
+ unlock_kernel();
return retval;
release_sb:
p9stat_free(st);
kfree(st);
deactivate_locked_super(sb);
+ unlock_kernel();
return retval;
}
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 6910a98..e94f111 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -351,11 +351,15 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
struct adfs_sb_info *asb;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_NODIRATIME;
asb = kzalloc(sizeof(*asb), GFP_KERNEL);
- if (!asb)
+ if (!asb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = asb;
/* set default options */
@@ -473,6 +477,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
goto error;
} else
sb->s_root->d_op = &adfs_dentry_operations;
+ unlock_kernel();
return 0;
error_free_bh:
@@ -480,6 +485,7 @@ error_free_bh:
error:
sb->s_fs_info = NULL;
kfree(asb);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 104fdcb..135f0d3 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -298,6 +298,8 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
u8 sig[4];
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, data);
pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
@@ -307,8 +309,10 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_flags |= MS_NODIRATIME;
sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
mutex_init(&sbi->s_bmlock);
@@ -316,6 +320,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
&blocksize,&sbi->s_prefix,
sbi->s_volume, &mount_flags)) {
printk(KERN_ERR "AFFS: Error parsing options\n");
+ unlock_kernel();
return -EINVAL;
}
/* N.B. after this point s_prefix must be released */
@@ -486,6 +491,7 @@ got_root:
sb->s_root->d_op = &affs_dentry_operations;
pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
+ unlock_kernel();
return 0;
/*
@@ -500,6 +506,7 @@ out_error_noinode:
kfree(sbi->s_prefix);
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/afs/super.c b/fs/afs/super.c
index e1ea1c2..108fb3e 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -294,12 +294,15 @@ static int afs_fill_super(struct super_block *sb, void *data)
struct inode *inode = NULL;
int ret;
+ lock_kernel();
+
_enter("");
/* allocate a superblock info record */
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
if (!as) {
_leave(" = -ENOMEM");
+ unlock_kernel();
return -ENOMEM;
}
@@ -329,6 +332,7 @@ static int afs_fill_super(struct super_block *sb, void *data)
sb->s_root = root;
_leave(" = 0");
+ unlock_kernel();
return 0;
error_inode:
@@ -342,6 +346,7 @@ error:
sb->s_fs_info = NULL;
_leave(" = %d", ret);
+ unlock_kernel();
return ret;
}
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 69c8142..3adaba9 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -323,6 +323,8 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
struct autofs_sb_info *sbi;
struct autofs_info *ino;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto fail_unlock;
@@ -418,6 +420,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
* Success! Install the root dentry now to indicate completion.
*/
s->s_root = root;
+ unlock_kernel();
return 0;
/*
@@ -439,6 +442,7 @@ fail_free:
kfree(sbi);
s->s_fs_info = NULL;
fail_unlock:
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 33baf27..f2aa193 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -759,6 +759,8 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
const unsigned long sb_block = 0;
const off_t x86_sb_off = 512;
+ lock_kernel();
+
save_mount_options(sb, data);
sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
@@ -867,6 +869,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
befs_sb->nls = load_nls_default();
}
+ unlock_kernel();
return 0;
/*****************/
unacquire_bh:
@@ -877,6 +880,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
unacquire_none:
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 6f60336..4bff506 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -356,9 +356,13 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
long ret = -EINVAL;
unsigned long i_sblock, i_eblock, i_eoff, s_size;
+ lock_kernel();
+
info = kzalloc(sizeof(*info), GFP_KERNEL);
- if (!info)
+ if (!info) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = info;
sb_set_blocksize(s, BFS_BSIZE);
@@ -463,6 +467,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
kfree(info->si_imap);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return -EIO;
}
@@ -484,12 +489,14 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
}
dump_imap("read_super", s);
mutex_init(&info->bfs_lock);
+ unlock_kernel();
return 0;
out:
brelse(bh);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c4e8353..ca0e22d 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -695,9 +695,13 @@ static int bm_fill_super(struct super_block * sb, void * data, int silent)
[3] = {"register", &bm_register_operations, S_IWUSR},
/* last one */ {""}
};
- int err = simple_fill_super(sb, 0x42494e4d, bm_files);
+ int err;
+
+ lock_kernel();
+ err = simple_fill_super(sb, 0x42494e4d, bm_files);
if (!err)
sb->s_op = &s_ops;
+ unlock_kernel();
return err;
}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 752a546..e5cd2cf 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -480,13 +480,17 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
fmode_t mode = FMODE_READ;
int error = 0;
+ lock_kernel();
+
if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
error = btrfs_parse_early_options(data, mode, fs_type,
&subvol_name, &fs_devices);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
error = btrfs_scan_one_device(dev_name, mode, fs_type, &fs_devices);
if (error)
@@ -555,6 +559,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
mnt->mnt_root = root;
kfree(subvol_name);
+ unlock_kernel();
return 0;
error_s:
@@ -563,6 +568,7 @@ error_close_devices:
btrfs_close_devices(fs_devices);
error_free_subvol_name:
kfree(subvol_name);
+ unlock_kernel();
return error;
}
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 9a5e4f5..09ccb9d 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -596,22 +596,30 @@ cifs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
int rc;
- struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
+ struct super_block *sb;
+
+ lock_kernel();
+
+ sb = sget(fs_type, NULL, set_anon_super, NULL);
cFYI(1, ("Devname: %s flags: %d ", dev_name, flags));
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
sb->s_flags = flags;
rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
if (rc) {
deactivate_locked_super(sb);
+ unlock_kernel();
return rc;
}
sb->s_flags |= MS_ACTIVE;
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 830f51a..d081fc5 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -147,6 +147,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
int error;
int idx;
+ lock_kernel();
+
idx = get_device_index((struct coda_mount_data *) data);
/* Ignore errors in data, for backward compatibility */
@@ -158,11 +160,13 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
vc = &coda_comms[idx];
if (!vc->vc_inuse) {
printk("coda_read_super: No pseudo device\n");
+ unlock_kernel();
return -EINVAL;
}
if ( vc->vc_sb ) {
printk("coda_read_super: Device already mounted\n");
+ unlock_kernel();
return -EBUSY;
}
@@ -196,7 +200,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root = d_alloc_root(root);
if (!sb->s_root)
goto error;
- return 0;
+ unlock_kernel();
+ return 0;
error:
if (root)
@@ -204,6 +209,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
if (vc)
vc->vc_sb = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 8421cea..5b2e06e 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -71,6 +71,8 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = CONFIGFS_MAGIC;
@@ -87,6 +89,7 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
inc_nlink(inode);
} else {
pr_debug("configfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -94,12 +97,14 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
config_group_init(&configfs_root_group);
configfs_root_group.cg_item.ci_dentry = root;
root->d_fsdata = &configfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index dd3634e..13e696a 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -227,11 +227,15 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
struct cramfs_sb_info *sbi;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_RDONLY;
sbi = kzalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* Invalidate the read buffers on mount: think disk change.. */
@@ -308,10 +312,12 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
iput(root);
goto out;
}
+ unlock_kernel();
return 0;
out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index d5f8c96..e206eef 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -24,6 +24,7 @@
#include <linux/parser.h>
#include <linux/fsnotify.h>
#include <linux/seq_file.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define DEVPTS_DEFAULT_MODE 0600
/*
@@ -363,17 +364,23 @@ static int devpts_get_sb(struct file_system_type *fs_type,
struct pts_mount_opts opts;
struct super_block *s;
+ lock_kernel();
+
error = parse_mount_options(data, PARSE_MOUNT, &opts);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
if (opts.newinstance)
s = sget(fs_type, NULL, set_anon_super, NULL);
else
s = sget(fs_type, compare_init_pts_sb, set_anon_super, NULL);
- if (IS_ERR(s))
+ if (IS_ERR(s)) {
+ unlock_kernel();
return PTR_ERR(s);
+ }
if (!s->s_root) {
s->s_flags = flags;
@@ -391,6 +398,7 @@ static int devpts_get_sb(struct file_system_type *fs_type,
if (error)
goto out_dput;
+ unlock_kernel();
return 0;
out_dput:
@@ -398,6 +406,7 @@ out_dput:
out_undo_sget:
deactivate_locked_super(s);
+ unlock_kernel();
return error;
}
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index c6ac85d..fdc7bda 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -600,6 +600,8 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
int rc;
struct super_block *sb;
+ lock_kernel();
+
rc = get_sb_nodev(fs_type, flags, raw_data, ecryptfs_fill_super, mnt);
if (rc < 0) {
printk(KERN_ERR "Getting sb failed; rc = [%d]\n", rc);
@@ -621,6 +623,7 @@ out_abort:
dput(sb->s_root); /* aka mnt->mnt_root, as set by get_sb_nodev() */
deactivate_locked_super(sb);
out:
+ unlock_kernel();
return rc;
}
diff --git a/fs/efs/super.c b/fs/efs/super.c
index f049428..0981141 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -249,9 +249,13 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
struct inode *root;
int ret = -EINVAL;
- sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
- if (!sb)
+ lock_kernel();
+
+ sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
+ if (!sb) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sb;
s->s_magic = EFS_SUPER_MAGIC;
@@ -319,12 +323,14 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
goto out_no_fs;
}
+ unlock_kernel();
return 0;
out_no_fs_ul:
out_no_fs:
s->s_fs_info = NULL;
kfree(sb);
+ unlock_kernel();
return ret;
}
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 9f500de..ea045b8 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -297,9 +297,13 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
struct osd_obj_id obj;
int ret;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* use mount options to fill superblock */
@@ -399,6 +403,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
out:
if (or)
osd_end_request(or);
+ unlock_kernel();
return ret;
free_sbi:
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 1a9ffee..5af1775 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -745,15 +745,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
+ err = -ENOMEM;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
- return -ENOMEM;
+ goto failed_unlock;
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
- return -ENOMEM;
+ goto failed_unlock;
}
sb->s_fs_info = sbi;
sbi->s_sb_block = sb_block;
@@ -1063,6 +1066,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
ext2_warning(sb, __func__,
"mounting ext3 filesystem as ext2");
ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+ unlock_kernel();
return 0;
cantfind_ext2:
@@ -1086,6 +1090,8 @@ failed_sbi:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
+failed_unlock:
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 7a520a8..38261a5 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1568,14 +1568,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -1992,6 +1997,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
"writeback");
lock_kernel();
+ unlock_kernel();
return 0;
cantfind_ext3:
@@ -2022,6 +2028,7 @@ out_fail:
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
lock_kernel();
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 312211e..9db81d2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2328,14 +2328,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
int err;
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -2913,7 +2918,6 @@ no_journal:
ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr);
- lock_kernel();
return 0;
cantfind_ext4:
@@ -2959,7 +2963,6 @@ out_fail:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
- lock_kernel();
return ret;
}
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index bbc94ae..31dd072 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -662,12 +662,16 @@ static int msdos_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
sb->s_flags |= MS_NOATIME;
sb->s_root->d_op = &msdos_dentry_operations;
+ unlock_kernel();
return 0;
}
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index f565f24..12961b8 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -1044,15 +1044,19 @@ static int vfat_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &vfat_dir_inode_operations, 1);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
if (MSDOS_SB(sb)->options.name_check != 's')
sb->s_root->d_op = &vfat_ci_dentry_ops;
else
sb->s_root->d_op = &vfat_dentry_ops;
+ unlock_kernel();
return 0;
}
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index 1e8af93..b8b7821 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -148,7 +148,7 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data)
* The superblock on success, else %NULL.
*
* Locking:
- * We are under the bkl and @sbp->s_lock.
+ * We are under @sbp->s_lock.
*/
static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
{
@@ -159,11 +159,14 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
struct inode *root;
int ret = -EINVAL;
+ lock_kernel();
+
sbp->s_flags |= MS_RDONLY;
infp = kzalloc(sizeof(*infp), GFP_KERNEL);
if (!infp) {
printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -236,6 +239,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
goto out_free_ilist;
}
+ unlock_kernel();
return 0;
out_free_ilist:
@@ -245,6 +249,7 @@ out_free_ilist:
out:
brelse(bp);
kfree(infp);
+ unlock_kernel();
return ret;
}
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 3773fd6..8d769f7 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -10,6 +10,7 @@
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define FUSE_CTL_SUPER_MAGIC 0x65735543
@@ -297,9 +298,13 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
struct fuse_conn *fc;
int err;
+ lock_kernel();
+
err = simple_fill_super(sb, FUSE_CTL_SUPER_MAGIC, &empty_descr);
- if (err)
+ if (err) {
+ unlock_kernel();
return err;
+ }
mutex_lock(&fuse_mutex);
BUG_ON(fuse_control_sb);
@@ -309,10 +314,12 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
if (err) {
fuse_control_sb = NULL;
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return err;
}
}
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return 0;
}
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1a822ce..5690279 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -20,6 +20,7 @@
#include <linux/random.h>
#include <linux/sched.h>
#include <linux/exportfs.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
MODULE_DESCRIPTION("Filesystem in Userspace");
@@ -919,6 +920,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
int err;
int is_bdev = sb->s_bdev != NULL;
+ lock_kernel();
+
err = -EINVAL;
if (sb->s_flags & MS_MANDLOCK)
goto err;
@@ -1022,6 +1025,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
fuse_send_init(fc, init_req);
+ unlock_kernel();
return 0;
err_unlock:
@@ -1036,6 +1040,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
err_fput:
fput(file);
err:
+ unlock_kernel();
return err;
}
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 52fb6c0..76415fe 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1120,9 +1120,12 @@ static int fill_super(struct super_block *sb, void *data, int silent)
struct gfs2_holder mount_gh;
int error;
+ lock_kernel();
+
sdp = init_sbd(sb);
if (!sdp) {
printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -1211,6 +1214,7 @@ static int fill_super(struct super_block *sb, void *data, int silent)
gfs2_glock_dq_uninit(&mount_gh);
gfs2_online_uevent(sdp);
+ unlock_kernel();
return 0;
fail_threads:
@@ -1240,6 +1244,7 @@ fail:
gfs2_delete_debugfs_file(sdp);
kfree(sdp);
sb->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
@@ -1268,10 +1273,12 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
struct path path;
int error;
+ lock_kernel();
error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
if (error) {
printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
dev_name, error);
+ unlock_kernel();
return error;
}
s = sget(&gfs2_fs_type, test_meta_super, set_meta_super,
@@ -1279,11 +1286,13 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
path_put(&path);
if (IS_ERR(s)) {
printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
+ unlock_kernel();
return PTR_ERR(s);
}
sdp = s->s_fs_info;
mnt->mnt_sb = s;
mnt->mnt_root = dget(sdp->sd_master_dir);
+ unlock_kernel();
return 0;
}
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index f7fcbe4..a2e19ff 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -381,9 +381,13 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root_inode;
int res;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -429,6 +433,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root->d_op = &hfs_dentry_operations;
/* everything's okay */
+ unlock_kernel();
return 0;
bail_iput:
@@ -437,6 +442,7 @@ bail_no_root:
printk(KERN_ERR "hfs: get root inode failed.\n");
bail:
hfs_mdb_put(sb);
+ unlock_kernel();
return res;
}
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 43022f3..824f57a 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -312,9 +312,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
struct nls_table *nls = NULL;
int err = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -459,11 +463,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
out:
unload_nls(sbi->nls);
sbi->nls = nls;
+ unlock_kernel();
return 0;
cleanup:
hfsplus_put_super(sb);
unload_nls(nls);
+ unlock_kernel();
return err;
}
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 032604e..5eb2c26 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -968,6 +968,8 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
char *host_root_path, *req_root = d;
int err;
+ lock_kernel();
+
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = HOSTFS_SUPER_MAGIC;
@@ -1016,6 +1018,7 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
goto out;
}
+ unlock_kernel();
return 0;
out_put:
@@ -1023,6 +1026,7 @@ out_put:
out_free:
kfree(host_root_path);
out:
+ unlock_kernel();
return err;
}
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2feaa0..a7b348a 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -477,11 +477,15 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
int o;
+ lock_kernel();
+
save_mount_options(s, options);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
sbi->sb_bmp_dir = NULL;
@@ -666,6 +670,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
root->i_blocks = 5;
hpfs_brelse4(&qbh);
}
+ unlock_kernel();
return 0;
bail4: brelse(bh2);
@@ -677,6 +682,7 @@ bail0:
kfree(sbi->sb_cp_table);
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index a5089a6..6263973 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -712,6 +712,8 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
struct vfsmount *proc_mnt;
int err = -ENOENT;
+ lock_kernel();
+
proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
if (IS_ERR(proc_mnt))
goto out;
@@ -731,6 +733,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
if (!sb->s_root)
goto out_iput;
+ unlock_kernel();
return 0;
out_iput:
@@ -738,6 +741,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
out_mntput:
mntput(proc_mnt);
out:
+ unlock_kernel();
return(err);
}
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 87a1258..53be2b9 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -32,6 +32,7 @@
#include <linux/security.h>
#include <linux/ima.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -824,6 +825,7 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
struct hugetlbfs_config config;
struct hugetlbfs_sb_info *sbinfo;
+ lock_kernel();
save_mount_options(sb, data);
config.nr_blocks = -1; /* No limit on size by default */
@@ -833,12 +835,16 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
config.mode = 0755;
config.hstate = &default_hstate;
ret = hugetlbfs_parse_options(data, &config);
- if (ret)
+ if (ret) {
+ unlock_kernel();
return ret;
+ }
sbinfo = kmalloc(sizeof(struct hugetlbfs_sb_info), GFP_KERNEL);
- if (!sbinfo)
+ if (!sbinfo) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbinfo;
sbinfo->hstate = config.hstate;
spin_lock_init(&sbinfo->stat_lock);
@@ -863,9 +869,11 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
goto out_free;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
out_free:
kfree(sbinfo);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 6b4dcd4..7c501d5 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -571,11 +571,15 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
int table, error = -EINVAL;
unsigned int vol_desc_start;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
if (!parse_options((char *)data, &opt))
@@ -895,6 +899,7 @@ root_found:
kfree(opt.iocharset);
+ unlock_kernel();
return 0;
/*
@@ -934,6 +939,7 @@ out_freesbi:
kfree(opt.iocharset);
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 9a80e8e..622bd51 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -148,14 +148,19 @@ static const struct super_operations jffs2_super_operations =
static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
{
struct jffs2_sb_info *c;
+ int ret;
+
+ lock_kernel();
D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():"
" New superblock for device %d (\"%s\")\n",
sb->s_mtd->index, sb->s_mtd->name));
c = kzalloc(sizeof(*c), GFP_KERNEL);
- if (!c)
+ if (!c) {
+ unlock_kernel();
return -ENOMEM;
+ }
c->mtd = sb->s_mtd;
c->os_priv = sb;
@@ -177,7 +182,9 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
#endif
- return jffs2_do_fill_super(sb, data, silent);
+ ret = jffs2_do_fill_super(sb, data, silent);
+ unlock_kernel();
+ return ret;
}
static int jffs2_get_sb(struct file_system_type *fs_type,
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 2234c73..329d7b6 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -425,14 +425,20 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
s64 newLVSize = 0;
int flag, ret = -EINVAL;
+ lock_kernel();
+
jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
- if (!new_valid_dev(sb->s_bdev->bd_dev))
+ if (!new_valid_dev(sb->s_bdev->bd_dev)) {
+ unlock_kernel();
return -EOVERFLOW;
+ }
sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
sbi->sb = sb;
sbi->uid = sbi->gid = sbi->umask = -1;
@@ -442,6 +448,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
sbi->flag = flag;
@@ -452,6 +459,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (newLVSize) {
printk(KERN_ERR "resize option for remount only\n");
+ unlock_kernel();
return -EINVAL;
}
@@ -527,6 +535,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
#endif
sb->s_time_gran = 1;
+ unlock_kernel();
return 0;
out_no_root:
@@ -548,6 +557,7 @@ out_kfree:
if (sbi->nls_tab)
unload_nls(sbi->nls_tab);
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/libfs.c b/fs/libfs.c
index 219576c..3484040 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -11,6 +11,7 @@
#include <linux/exportfs.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -422,6 +423,8 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
struct dentry *dentry;
int i;
+ lock_kernel();
+
s->s_blocksize = PAGE_CACHE_SIZE;
s->s_blocksize_bits = PAGE_CACHE_SHIFT;
s->s_magic = magic;
@@ -429,8 +432,10 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
s->s_time_gran = 1;
inode = new_inode(s);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
/*
* because the root inode is 1, the files array must not contain an
* entry at index 1
@@ -444,6 +449,7 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
for (i = 0; !files->name || files->name[0]; i++, files++) {
@@ -469,10 +475,12 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
d_add(dentry, inode);
}
s->s_root = root;
+ unlock_kernel();
return 0;
out:
d_genocide(root);
dput(root);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 74ea82d..b8aa0a6 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -147,9 +147,13 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
struct minix_sb_info *sbi;
int ret = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
BUILD_BUG_ON(32 != sizeof (struct minix_inode));
@@ -265,6 +269,7 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
else if (sbi->s_mount_state & MINIX_ERROR_FS)
printk("MINIX-fs: mounting file system with errors, "
"running fsck is recommended\n");
+ unlock_kernel();
return 0;
out_iput:
@@ -314,6 +319,7 @@ out_bad_sb:
out:
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/namespace.c b/fs/namespace.c
index bdc3cb4..3f95497 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1647,9 +1647,7 @@ static int do_new_mount(struct path *path, char *type, int flags,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- lock_kernel();
mnt = do_kern_mount(type, flags, name, data);
- unlock_kernel();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index cf98da1..a020d86 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -445,10 +445,14 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
#endif
struct ncp_entry_info finfo;
+ lock_kernel();
+
data.wdog_pid = NULL;
server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
- if (!server)
+ if (!server) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = server;
error = -EFAULT;
@@ -695,6 +699,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
if (!sb->s_root)
goto out_no_root;
sb->s_root->d_op = &ncp_root_dentry_operations;
+ unlock_kernel();
return 0;
out_no_root:
@@ -729,6 +734,7 @@ out:
put_pid(data.wdog_pid);
sb->s_fs_info = NULL;
kfree(server);
+ unlock_kernel();
return error;
}
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 90be551..1f97aad 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1877,6 +1877,8 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
options->version <= 6))))
return 0;
+ lock_kernel();
+
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
@@ -2184,6 +2186,7 @@ out:
out_free_fh:
kfree(mntfh);
kfree(data);
+ unlock_kernel();
return error;
out_err_nosb:
@@ -2227,6 +2230,8 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs_xdev_get_sb()\n");
/* create a new volume representation */
@@ -2281,17 +2286,20 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs_xdev_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2475,6 +2483,8 @@ static int nfs4_remote_get_sb(struct file_system_type *fs_type,
};
int error = -ENOMEM;
+ lock_kernel();
+
mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
if (data == NULL || mntfh == NULL)
goto out_free_fh;
@@ -2534,6 +2544,7 @@ out:
security_free_mnt_opts(&data->lsm_opts);
out_free_fh:
kfree(mntfh);
+ unlock_kernel();
return error;
out_free:
@@ -2794,6 +2805,8 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
/* create a new volume representation */
@@ -2847,17 +2860,20 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs4_referral_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2873,6 +2889,8 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
struct vfsmount *root_mnt;
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
export_path = data->mnt_path;
@@ -2890,6 +2908,7 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
out:
dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error,
error != 0 ? " [error]" : "");
+ unlock_kernel();
return error;
}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 5c01fc1..dcaef52 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1347,7 +1347,12 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
#endif
/* last one */ {""}
};
- return simple_fill_super(sb, 0x6e667364, nfsd_files);
+ int ret;
+
+ lock_kernel();
+ ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
+ unlock_kernel();
+ return ret;
}
static int nfsd_get_sb(struct file_system_type *fs_type,
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 644e667..3448ec3 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1059,9 +1059,13 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
struct the_nilfs *nilfs;
int err, need_to_close = 1;
+ lock_kernel();
+
sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type);
- if (IS_ERR(sd.bdev))
+ if (IS_ERR(sd.bdev)) {
+ unlock_kernel();
return PTR_ERR(sd.bdev);
+ }
/*
* To get mount instance using sget() vfs-routine, NILFS needs
@@ -1142,6 +1146,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
if (need_to_close)
close_bdev_exclusive(sd.bdev, flags);
simple_set_mnt(mnt, s);
+ unlock_kernel();
return 0;
failed_unlock:
@@ -1150,6 +1155,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
failed:
close_bdev_exclusive(sd.bdev, flags);
+ unlock_kernel();
return err;
cancel_new:
@@ -1163,6 +1169,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
* We must finish all post-cleaning before this call;
* put_nilfs() needs the block device.
*/
+ unlock_kernel();
return err;
}
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 80b0477..ab09c02 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2723,6 +2723,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
struct inode *tmp_ino;
int blocksize, result;
+ lock_kernel();
+
/*
* We do a pretty difficult piece of bootstrap by reading the
* MFT (and other metadata) from disk into memory. We'll only
@@ -2746,6 +2748,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Allocation of NTFS volume structure "
"failed. Aborting mount...");
lockdep_on();
+ unlock_kernel();
return -ENOMEM;
}
/* Initialize ntfs_volume structure. */
@@ -2933,6 +2936,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
sb->s_export_op = &ntfs_export_ops;
lock_kernel();
lockdep_on();
+ unlock_kernel();
return 0;
}
ntfs_error(sb, "Failed to allocate root directory.");
@@ -3053,6 +3057,7 @@ err_out_now:
kfree(vol);
ntfs_debug("Failed, returning -EINVAL.");
lockdep_on();
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ocfs2/dlm/dlmfs.c b/fs/ocfs2/dlm/dlmfs.c
index 02bf178..58ce813 100644
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlm/dlmfs.c
@@ -528,21 +528,27 @@ static int dlmfs_fill_super(struct super_block * sb,
struct inode * inode;
struct dentry * root;
+ lock_kernel();
+
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = DLMFS_MAGIC;
sb->s_op = &dlmfs_ops;
inode = dlmfs_get_root_inode(sb);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index c0e48ae..fab815f 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -986,6 +986,8 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
char nodestr[8];
struct ocfs2_blockcheck_stats stats;
+ lock_kernel();
+
mlog_entry("%p, %p, %i", sb, data, silent);
if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
@@ -1172,6 +1174,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
atomic_set(&osb->vol_state, VOLUME_DISABLED);
wake_up(&osb->osb_mount_event);
mlog_exit(status);
+ unlock_kernel();
return status;
}
}
@@ -1186,6 +1189,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
ocfs2_orphan_scan_start(osb);
mlog_exit(status);
+ unlock_kernel();
return status;
read_super_error:
@@ -1201,6 +1205,7 @@ read_super_error:
}
mlog_exit(status);
+ unlock_kernel();
return status;
}
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index f3b7c15..ddfbb22 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -416,11 +416,15 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
sector_t start;
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, (char *) data);
sbi = kzalloc(sizeof(struct omfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -525,6 +529,7 @@ out_brelse_bh2:
out_brelse_bh:
brelse(bh);
end:
+ unlock_kernel();
return ret;
}
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index ffcd04f..50dc4be 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -386,6 +386,8 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
struct op_inode_info *oi;
int ret;
+ lock_kernel();
+
s->s_flags |= MS_NOATIME;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
@@ -405,6 +407,7 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
s->s_root = d_alloc_root(root_inode);
if (!s->s_root)
goto out_no_root_dentry;
+ unlock_kernel();
return 0;
out_no_root_dentry:
@@ -412,6 +415,7 @@ out_no_root_dentry:
ret = -ENOMEM;
out_no_root:
printk("openprom_fill_super: get root inode failed\n");
+ unlock_kernel();
return ret;
}
diff --git a/fs/proc/root.c b/fs/proc/root.c
index b080b79..6384680 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -18,6 +18,7 @@
#include <linux/bitops.h>
#include <linux/mount.h>
#include <linux/pid_namespace.h>
+#include <linux/smp_lock.h> /* For lock_kernel() only */
#include "internal.h"
@@ -43,6 +44,8 @@ static int proc_get_sb(struct file_system_type *fs_type,
struct pid_namespace *ns;
struct proc_inode *ei;
+ lock_kernel();
+
if (proc_mnt) {
/* Seed the root directory with a pid so it doesn't need
* to be special in base.c. I would do this earlier but
@@ -60,14 +63,17 @@ static int proc_get_sb(struct file_system_type *fs_type,
ns = current->nsproxy->pid_ns;
sb = sget(fs_type, proc_test_super, proc_set_super, ns);
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
if (!sb->s_root) {
sb->s_flags = flags;
err = proc_fill_super(sb);
if (err) {
deactivate_locked_super(sb);
+ unlock_kernel();
return err;
}
@@ -83,6 +89,7 @@ static int proc_get_sb(struct file_system_type *fs_type,
}
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index d2cd179..18640ce 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -253,9 +253,13 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
struct qnx4_sb_info *qs;
int ret = -EINVAL;
+ lock_kernel();
+
qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
- if (!qs)
+ if (!qs) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = qs;
sb_set_blocksize(s, QNX4_BLOCK_SIZE);
@@ -303,6 +307,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
brelse(bh);
+ unlock_kernel();
return 0;
outi:
@@ -312,6 +317,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
outnobh:
kfree(qs);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index a6090aa..9b3983f 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -35,6 +35,7 @@
#include <linux/sched.h>
#include <linux/parser.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
#include "internal.h"
@@ -220,6 +221,8 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
struct dentry *root;
int err;
+ lock_kernel();
+
save_mount_options(sb, data);
fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL);
@@ -253,11 +256,13 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
goto fail;
}
+ unlock_kernel();
return 0;
fail:
kfree(fsi);
sb->s_fs_info = NULL;
iput(inode);
+ unlock_kernel();
return err;
}
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index f0ad05f..f32bf62 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1608,6 +1608,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
char *qf_names[MAXQUOTAS] = {};
unsigned int qfmt = 0;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
@@ -1852,6 +1854,7 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
init_waitqueue_head(&(sbi->s_wait));
spin_lock_init(&sbi->bitmap_lock);
+ unlock_kernel();
return (0);
error:
@@ -1872,6 +1875,7 @@ error:
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return errval;
}
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index c117fa8..7342617 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -468,6 +468,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
size_t len;
int ret;
+ lock_kernel();
+
#ifdef CONFIG_BLOCK
if (!sb->s_mtd) {
sb_set_blocksize(sb, ROMBSIZE);
@@ -484,8 +486,10 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
/* read the image superblock and check it */
rsb = kmalloc(512, GFP_KERNEL);
- if (!rsb)
+ if (!rsb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = (void *) 512;
ret = romfs_dev_read(sb, 0, rsb, 512);
@@ -535,15 +539,18 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
if (!sb->s_root)
goto error_i;
+ unlock_kernel();
return 0;
error_i:
iput(root);
error:
+ unlock_kernel();
return -EINVAL;
error_rsb_inval:
ret = -EINVAL;
error_rsb:
+ unlock_kernel();
return ret;
}
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 1c4c8f0..c3c9044 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -500,6 +500,8 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
void *mem;
static int warn_count;
+ lock_kernel();
+
if (warn_count < 5) {
warn_count++;
printk(KERN_EMERG "smbfs is deprecated and will be removed"
@@ -615,6 +617,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
smb_new_dentry(sb->s_root);
+ unlock_kernel();
return 0;
out_no_root:
@@ -635,9 +638,11 @@ out_wrong_data:
out_no_data:
printk(KERN_ERR "smb_fill_super: missing data argument\n");
out_fail:
+ unlock_kernel();
return -EINVAL;
out_no_server:
printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 6c197ef..23cea83 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -78,11 +78,14 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
u64 lookup_table_start;
int err;
+ lock_kernel();
+
TRACE("Entered squashfs_fill_superblock\n");
sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL);
if (sb->s_fs_info == NULL) {
ERROR("Failed to allocate squashfs_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
msblk = sb->s_fs_info;
@@ -286,6 +289,7 @@ allocate_root:
TRACE("Leaving squashfs_fill_super\n");
kfree(sblk);
+ unlock_kernel();
return 0;
failed_mount:
@@ -299,12 +303,14 @@ failed_mount:
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
kfree(sblk);
+ unlock_kernel();
return err;
failure:
kfree(msblk->stream.workspace);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 4974995..2e5a870 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include "sysfs.h"
@@ -45,6 +46,8 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = SYSFS_MAGIC;
@@ -58,6 +61,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
mutex_unlock(&sysfs_mutex);
if (!inode) {
pr_debug("sysfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -66,10 +70,12 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
root->d_fsdata = &sysfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/sysv/super.c b/fs/sysv/super.c
index 5a903da..145d949 100644
--- a/fs/sysv/super.c
+++ b/fs/sysv/super.c
@@ -357,7 +357,9 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
struct sysv_sb_info *sbi;
unsigned long blocknr;
int size = 0, i;
-
+
+ lock_kernel();
+
BUILD_BUG_ON(1024 != sizeof (struct xenix_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv4_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv2_super_block));
@@ -365,8 +367,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
BUILD_BUG_ON(64 != sizeof (struct sysv_inode));
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -409,8 +413,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
if (bh && bh1) {
sbi->s_bh1 = bh1;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, size))
+ if (complete_read_super(sb, silent, size)) {
+ unlock_kernel();
return 0;
+ }
}
brelse(bh1);
@@ -419,6 +425,7 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
printk("oldfs: cannot read superblock\n");
failed:
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
Eunknown:
@@ -442,14 +449,18 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
struct v7_super_block *v7sb;
struct sysv_inode *v7i;
+ lock_kernel();
+
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad i-node size");
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -487,13 +498,16 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_bh1 = bh;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, 1))
+ if (complete_read_super(sb, silent, 1)) {
+ unlock_kernel();
return 0;
+ }
failed:
brelse(bh2);
brelse(bh);
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 333e181..04a0fc9 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2029,6 +2029,8 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
struct super_block *sb;
int err;
+ lock_kernel();
+
dbg_gen("name %s, flags %#x", name, flags);
/*
@@ -2040,6 +2042,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
if (IS_ERR(ubi)) {
ubifs_err("cannot open \"%s\", error %d",
name, (int)PTR_ERR(ubi));
+ unlock_kernel();
return PTR_ERR(ubi);
}
ubi_get_volume_info(ubi, &vi);
@@ -2077,12 +2080,14 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
ubi_close_volume(ubi);
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
out_deact:
deactivate_locked_super(sb);
out_close:
ubi_close_volume(ubi);
+ unlock_kernel();
return err;
}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9d1b8c2..fa6f8db 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1866,6 +1866,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
struct kernel_lb_addr rootdir, fileset;
struct udf_sb_info *sbi;
+ lock_kernel();
+
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
uopt.uid = -1;
uopt.gid = -1;
@@ -1874,8 +1876,10 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
uopt.dmode = UDF_INVALID_MODE;
sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -2021,6 +2025,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
goto error_out;
}
sb->s_maxbytes = MAX_LFS_FILESIZE;
+ unlock_kernel();
return 0;
error_out:
@@ -2041,6 +2046,7 @@ error_out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 5faed79..31ad198 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -646,6 +646,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
unsigned maxsymlen;
int ret = -EINVAL;
+ lock_kernel();
+
uspi = NULL;
ubh = NULL;
flags = 0;
@@ -1107,6 +1109,7 @@ magic_found:
goto failed;
UFSD("EXIT\n");
+ unlock_kernel();
return 0;
dalloc_failed:
@@ -1118,10 +1121,12 @@ failed:
kfree(sbi);
sb->s_fs_info = NULL;
UFSD("EXIT (FAILED)\n");
+ unlock_kernel();
return ret;
failed_nomem:
UFSD("EXIT (NOMEM)\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 18a4b8e..7426166 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1412,6 +1412,8 @@ xfs_fs_fill_super(
int flags = 0, error = ENOMEM;
char *mtpt = NULL;
+ lock_kernel();
+
mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
if (!mp)
goto out;
@@ -1506,6 +1508,7 @@ xfs_fs_fill_super(
kfree(mtpt);
xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
+ unlock_kernel();
return 0;
out_filestream_unmount:
@@ -1522,6 +1525,7 @@ xfs_fs_fill_super(
kfree(mtpt);
kfree(mp);
out:
+ unlock_kernel();
return -error;
fail_vnrele:
--
1.6.4.2
_______________________________________________
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xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply related [flat|nested] 70+ messages in thread* Re: [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
2009-11-02 10:04 ` Jan Blunck
` (4 preceding siblings ...)
(?)
@ 2009-11-02 17:11 ` Jan Blunck
2009-11-03 10:12 ` Christoph Hellwig
-1 siblings, 1 reply; 70+ messages in thread
From: Jan Blunck @ 2009-11-02 17:11 UTC (permalink / raw)
To: linux-fsdevel
Cc: Matthew Wilcox, Linux-Kernel Mailinglist, Christian Borntraeger
[-- Attachment #1: Type: text/plain, Size: 1119 bytes --]
On Mon, Nov 02, Jan Blunck wrote:
> I've read through all the code formerly covered by the BKL inside
> do_kern_mount() and have satisfied myself that it doesn't need the BKL
> any more.
>
> do_kern_mount() is already called without the BKL when mounting the rootfs
> and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called
> from various places without BKL: simple_pin_fs(), nfs_do_clone_mount()
> through nfs_follow_mountpoint(), afs_mntpt_do_automount() through
> afs_mntpt_follow_link(). Both later functions are actually the filesystems
> follow_link inode operation. vfs_kern_mount() is calling the specified
> get_sb function and lets the filesystem do its job by calling the given
> fill_super function.
>
> Therefore I think it is safe to push down the BKL from the VFS to the
> low-level filesystems get_sb/fill_super operation.
>
> Signed-off-by: Jan Blunck <jblunck@suse.de>
> Cc: Matthew Wilcox <matthew@wil.cx>
Attached is a new version of the patch that includes the changes for
filesystems outside of fs/ directory as well. Besides that I trimmed the CC
list this time.
Cheers,
Jan
[-- Attachment #2: 0001-BKL-Push-down-BKL-from-do_new_mount-to-the-filesyste.patch --]
[-- Type: text/x-patch, Size: 82522 bytes --]
>From 211bc31463c06e125c084ca72aaa06c7e3ebb0a2 Mon Sep 17 00:00:00 2001
From: Jan Blunck <jblunck@suse.de>
Date: Mon, 2 Nov 2009 16:30:27 +0100
Subject: [PATCH 01/28] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
I've read through all the code formerly covered by the BKL inside
do_kern_mount() and have satisfied myself that it doesn't need the BKL
any more.
do_kern_mount() is already called without the BKL when mounting the rootfs
and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called
from various places without BKL: simple_pin_fs(), nfs_do_clone_mount()
through nfs_follow_mountpoint(), afs_mntpt_do_automount() through
afs_mntpt_follow_link(). Both later functions are actually the filesystems
follow_link inode operation. vfs_kern_mount() is calling the specified
get_sb function and lets the filesystem do its job by calling the given
fill_super function.
Therefore I think it is safe to push down the BKL from the VFS to the
low-level filesystems get_sb/fill_super operation.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Matthew Wilcox <matthew@wil.cx>
---
arch/powerpc/platforms/cell/spufs/inode.c | 8 +++++++-
arch/s390/hypfs/inode.c | 9 ++++++++-
drivers/infiniband/hw/ipath/ipath_fs.c | 8 ++++++--
drivers/isdn/capi/capifs.c | 10 ++++++++--
drivers/misc/ibmasm/ibmasmfs.c | 9 ++++++++-
drivers/oprofile/oprofilefs.c | 9 ++++++++-
drivers/staging/pohmelfs/inode.c | 5 +++++
drivers/usb/core/inode.c | 5 +++++
drivers/usb/gadget/inode.c | 12 ++++++++++--
drivers/xen/xenfs/super.c | 7 ++++++-
fs/9p/vfs_super.c | 9 ++++++++-
fs/adfs/super.c | 8 +++++++-
fs/affs/super.c | 9 ++++++++-
fs/afs/super.c | 5 +++++
fs/autofs4/inode.c | 4 ++++
fs/befs/linuxvfs.c | 4 ++++
fs/bfs/inode.c | 9 ++++++++-
fs/binfmt_misc.c | 7 ++++++-
fs/btrfs/super.c | 8 +++++++-
fs/cifs/cifsfs.c | 12 ++++++++++--
fs/coda/inode.c | 8 +++++++-
fs/configfs/mount.c | 5 +++++
fs/cramfs/inode.c | 8 +++++++-
fs/devpts/inode.c | 13 +++++++++++--
fs/ecryptfs/main.c | 4 ++++
fs/efs/super.c | 10 ++++++++--
fs/exofs/super.c | 7 ++++++-
fs/ext2/super.c | 10 ++++++++--
fs/ext3/super.c | 9 ++++++++-
fs/ext4/super.c | 9 ++++++---
fs/fat/namei_msdos.c | 7 ++++++-
fs/fat/namei_vfat.c | 7 ++++++-
fs/freevxfs/vxfs_super.c | 7 ++++++-
fs/fuse/control.c | 9 ++++++++-
fs/fuse/inode.c | 5 +++++
fs/gfs2/ops_fstype.c | 10 ++++++++++
fs/hfs/super.c | 8 +++++++-
fs/hfsplus/super.c | 8 +++++++-
fs/hostfs/hostfs_kern.c | 4 ++++
fs/hpfs/super.c | 8 +++++++-
fs/hppfs/hppfs.c | 4 ++++
fs/hugetlbfs/inode.c | 12 ++++++++++--
fs/isofs/inode.c | 8 +++++++-
fs/jffs2/super.c | 11 +++++++++--
fs/jfs/super.c | 14 ++++++++++++--
fs/libfs.c | 10 +++++++++-
fs/minix/inode.c | 8 +++++++-
fs/namespace.c | 2 --
fs/ncpfs/inode.c | 8 +++++++-
fs/nfs/super.c | 24 ++++++++++++++++++++++++
fs/nfsd/nfsctl.c | 8 +++++++-
fs/nilfs2/super.c | 9 ++++++++-
fs/ntfs/super.c | 5 +++++
fs/ocfs2/dlm/dlmfs.c | 9 ++++++++-
fs/ocfs2/super.c | 5 +++++
fs/omfs/inode.c | 7 ++++++-
fs/openpromfs/inode.c | 4 ++++
fs/proc/root.c | 9 ++++++++-
fs/qnx4/inode.c | 8 +++++++-
fs/ramfs/inode.c | 5 +++++
fs/reiserfs/super.c | 4 ++++
fs/romfs/super.c | 9 ++++++++-
fs/smbfs/inode.c | 5 +++++
fs/squashfs/super.c | 6 ++++++
fs/sysfs/mount.c | 6 ++++++
fs/sysv/super.c | 25 ++++++++++++++++++++-----
fs/ubifs/super.c | 5 +++++
fs/udf/super.c | 8 +++++++-
fs/ufs/super.c | 5 +++++
fs/xfs/linux-2.6/xfs_super.c | 4 ++++
ipc/mqueue.c | 4 ++++
kernel/cgroup.c | 4 ++++
kernel/cpuset.c | 4 ++++
mm/shmem.c | 9 ++++++++-
net/sunrpc/rpc_pipe.c | 10 +++++++++-
security/inode.c | 7 ++++++-
security/selinux/selinuxfs.c | 5 +++++
security/smack/smackfs.c | 4 ++++
78 files changed, 540 insertions(+), 67 deletions(-)
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index fc1b1c4..a68ea02 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -34,6 +34,7 @@
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/parser.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include <asm/prom.h>
#include <asm/spu.h>
@@ -781,6 +782,9 @@ spufs_fill_super(struct super_block *sb, void *data, int silent)
.drop_inode = generic_delete_inode,
.show_options = generic_show_options,
};
+ int res;
+
+ lock_kernel();
save_mount_options(sb, data);
@@ -795,7 +799,9 @@ spufs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_op = &s_ops;
sb->s_fs_info = info;
- return spufs_create_root(sb, data);
+ res = spufs_create_root(sb, data);
+ unlock_kernel();
+ return res;
}
static int
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index 341aff2..75538cd 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -22,6 +22,7 @@
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/mount.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include <asm/ebcdic.h>
#include "hypfs.h"
@@ -277,9 +278,13 @@ static int hypfs_fill_super(struct super_block *sb, void *data, int silent)
int rc = 0;
struct hypfs_sb_info *sbi;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct hypfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
mutex_init(&sbi->lock);
sbi->uid = current_uid();
sbi->gid = current_gid();
@@ -319,6 +324,7 @@ static int hypfs_fill_super(struct super_block *sb, void *data, int silent)
hypfs_update_update(sb);
sb->s_root = root_dentry;
pr_info("Hypervisor filesystem mounted\n");
+ unlock_kernel();
return 0;
err_tree:
@@ -327,6 +333,7 @@ err_tree:
dput(root_dentry);
err_alloc:
kfree(sbi);
+ unlock_kernel();
return rc;
}
diff --git a/drivers/infiniband/hw/ipath/ipath_fs.c b/drivers/infiniband/hw/ipath/ipath_fs.c
index b368406..d5723c6 100644
--- a/drivers/infiniband/hw/ipath/ipath_fs.c
+++ b/drivers/infiniband/hw/ipath/ipath_fs.c
@@ -37,6 +37,7 @@
#include <linux/pagemap.h>
#include <linux/init.h>
#include <linux/namei.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "ipath_kernel.h"
@@ -362,10 +363,13 @@ bail:
static int ipathfs_get_sb(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data, struct vfsmount *mnt)
{
- int ret = get_sb_single(fs_type, flags, data,
- ipathfs_fill_super, mnt);
+ int ret;
+
+ lock_kernel();
+ ret = get_sb_single(fs_type, flags, data, ipathfs_fill_super, mnt);
if (ret >= 0)
ipath_super = mnt->mnt_sb;
+ unlock_kernel();
return ret;
}
diff --git a/drivers/isdn/capi/capifs.c b/drivers/isdn/capi/capifs.c
index 9f8f67b..a408f72 100644
--- a/drivers/isdn/capi/capifs.c
+++ b/drivers/isdn/capi/capifs.c
@@ -16,6 +16,7 @@
#include <linux/init.h>
#include <linux/ctype.h>
#include <linux/sched.h> /* current */
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "capifs.h"
@@ -102,6 +103,8 @@ capifs_fill_super(struct super_block *s, void *data, int silent)
{
struct inode * inode;
+ lock_kernel();
+
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
s->s_magic = CAPIFS_SUPER_MAGIC;
@@ -119,12 +122,15 @@ capifs_fill_super(struct super_block *s, void *data, int silent)
inode->i_nlink = 2;
capifs_root = s->s_root = d_alloc_root(inode);
- if (s->s_root)
+ if (s->s_root) {
+ unlock_kernel();
return 0;
-
+ }
+
printk("capifs: get root dentry failed\n");
iput(inode);
fail:
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/drivers/misc/ibmasm/ibmasmfs.c b/drivers/misc/ibmasm/ibmasmfs.c
index aecf40e..83ef0f7 100644
--- a/drivers/misc/ibmasm/ibmasmfs.c
+++ b/drivers/misc/ibmasm/ibmasmfs.c
@@ -75,6 +75,7 @@
#include <linux/fs.h>
#include <linux/pagemap.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include <asm/uaccess.h>
#include <asm/io.h>
#include "ibmasm.h"
@@ -116,6 +117,8 @@ static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent)
struct inode *root;
struct dentry *root_dentry;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = IBMASMFS_MAGIC;
@@ -123,8 +126,10 @@ static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent)
sb->s_time_gran = 1;
root = ibmasmfs_make_inode (sb, S_IFDIR | 0500);
- if (!root)
+ if (!root) {
+ unlock_kernel();
return -ENOMEM;
+ }
root->i_op = &simple_dir_inode_operations;
root->i_fop = ibmasmfs_dir_ops;
@@ -132,11 +137,13 @@ static int ibmasmfs_fill_super (struct super_block *sb, void *data, int silent)
root_dentry = d_alloc_root(root);
if (!root_dentry) {
iput(root);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_root = root_dentry;
ibmasmfs_create_files(sb, root_dentry);
+ unlock_kernel();
return 0;
}
diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c
index 2766a6d..6d4df37 100644
--- a/drivers/oprofile/oprofilefs.c
+++ b/drivers/oprofile/oprofilefs.c
@@ -15,6 +15,7 @@
#include <linux/oprofile.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include <asm/uaccess.h>
#include "oprof.h"
@@ -243,6 +244,8 @@ static int oprofilefs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root_inode;
struct dentry *root_dentry;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = OPROFILEFS_MAGIC;
@@ -250,13 +253,16 @@ static int oprofilefs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_time_gran = 1;
root_inode = oprofilefs_get_inode(sb, S_IFDIR | 0755);
- if (!root_inode)
+ if (!root_inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
root_inode->i_op = &simple_dir_inode_operations;
root_inode->i_fop = &simple_dir_operations;
root_dentry = d_alloc_root(root_inode);
if (!root_dentry) {
iput(root_inode);
+ unlock_kernel();
return -ENOMEM;
}
@@ -265,6 +271,7 @@ static int oprofilefs_fill_super(struct super_block *sb, void *data, int silent)
oprofile_create_files(sb, root_dentry);
// FIXME: verify kill_litter_super removes our dentries
+ unlock_kernel();
return 0;
}
diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c
index c94de31..20a63d8 100644
--- a/drivers/staging/pohmelfs/inode.c
+++ b/drivers/staging/pohmelfs/inode.c
@@ -30,6 +30,7 @@
#include <linux/statfs.h>
#include <linux/writeback.h>
#include <linux/quotaops.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "netfs.h"
@@ -1821,6 +1822,8 @@ static int pohmelfs_fill_super(struct super_block *sb, void *data, int silent)
struct pohmelfs_inode *npi;
struct qstr str;
+ lock_kernel();
+
psb = kzalloc(sizeof(struct pohmelfs_sb), GFP_KERNEL);
if (!psb)
goto err_out_exit;
@@ -1915,6 +1918,7 @@ static int pohmelfs_fill_super(struct super_block *sb, void *data, int silent)
INIT_DELAYED_WORK(&psb->dwork, pohmelfs_trans_scan);
schedule_delayed_work(&psb->dwork, psb->trans_scan_timeout);
+ unlock_kernel();
return 0;
err_out_put_root:
@@ -1931,6 +1935,7 @@ err_out_free_sb:
err_out_exit:
dprintk("%s: err: %d.\n", __func__, err);
+ unlock_kernel();
return err;
}
diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index 97b40ce..5c5bf37 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -460,6 +460,8 @@ static int usbfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = USBDEVICE_SUPER_MAGIC;
@@ -469,6 +471,7 @@ static int usbfs_fill_super(struct super_block *sb, void *data, int silent)
if (!inode) {
dbg("%s: could not get inode!",__func__);
+ unlock_kernel();
return -ENOMEM;
}
@@ -476,9 +479,11 @@ static int usbfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
dbg("%s: could not get root dentry!",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index bf0f652..8762dad 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -2046,13 +2046,19 @@ gadgetfs_fill_super (struct super_block *sb, void *opts, int silent)
struct dentry *d;
struct dev_data *dev;
- if (the_device)
+ lock_kernel();
+
+ if (the_device) {
+ unlock_kernel();
return -ESRCH;
+ }
/* fake probe to determine $CHIP */
(void) usb_gadget_register_driver (&probe_driver);
- if (!CHIP)
+ if (!CHIP) {
+ unlock_kernel();
return -ENODEV;
+ }
/* superblock */
sb->s_blocksize = PAGE_CACHE_SIZE;
@@ -2089,6 +2095,7 @@ gadgetfs_fill_super (struct super_block *sb, void *opts, int silent)
* from binding to a controller.
*/
the_device = dev;
+ unlock_kernel();
return 0;
enomem3:
@@ -2098,6 +2105,7 @@ enomem2:
enomem1:
iput (inode);
enomem0:
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c
index 6559e0c..46d34ea 100644
--- a/drivers/xen/xenfs/super.c
+++ b/drivers/xen/xenfs/super.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "xenfs.h"
@@ -43,8 +44,12 @@ static int xenfs_fill_super(struct super_block *sb, void *data, int silent)
{ "capabilities", &capabilities_file_ops, S_IRUGO },
{""},
};
+ int res;
- return simple_fill_super(sb, XENFS_SUPER_MAGIC, xenfs_files);
+ lock_kernel();
+ res = simple_fill_super(sb, XENFS_SUPER_MAGIC, xenfs_files);
+ unlock_kernel();
+ return res;
}
static int xenfs_get_sb(struct file_system_type *fs_type,
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 14a8644..4156a0c 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -106,11 +106,15 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
struct p9_fid *fid;
int retval = 0;
+ lock_kernel();
+
P9_DPRINTK(P9_DEBUG_VFS, " \n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
- if (!v9ses)
+ if (!v9ses) {
+ unlock_kernel();
return -ENOMEM;
+ }
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
@@ -155,6 +159,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
free_stat:
@@ -167,12 +172,14 @@ clunk_fid:
close_session:
v9fs_session_close(v9ses);
kfree(v9ses);
+ unlock_kernel();
return retval;
release_sb:
p9stat_free(st);
kfree(st);
deactivate_locked_super(sb);
+ unlock_kernel();
return retval;
}
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 6910a98..e94f111 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -351,11 +351,15 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
struct adfs_sb_info *asb;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_NODIRATIME;
asb = kzalloc(sizeof(*asb), GFP_KERNEL);
- if (!asb)
+ if (!asb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = asb;
/* set default options */
@@ -473,6 +477,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
goto error;
} else
sb->s_root->d_op = &adfs_dentry_operations;
+ unlock_kernel();
return 0;
error_free_bh:
@@ -480,6 +485,7 @@ error_free_bh:
error:
sb->s_fs_info = NULL;
kfree(asb);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 104fdcb..135f0d3 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -298,6 +298,8 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
u8 sig[4];
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, data);
pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
@@ -307,8 +309,10 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_flags |= MS_NODIRATIME;
sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
mutex_init(&sbi->s_bmlock);
@@ -316,6 +320,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
&blocksize,&sbi->s_prefix,
sbi->s_volume, &mount_flags)) {
printk(KERN_ERR "AFFS: Error parsing options\n");
+ unlock_kernel();
return -EINVAL;
}
/* N.B. after this point s_prefix must be released */
@@ -486,6 +491,7 @@ got_root:
sb->s_root->d_op = &affs_dentry_operations;
pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
+ unlock_kernel();
return 0;
/*
@@ -500,6 +506,7 @@ out_error_noinode:
kfree(sbi->s_prefix);
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/afs/super.c b/fs/afs/super.c
index e1ea1c2..108fb3e 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -294,12 +294,15 @@ static int afs_fill_super(struct super_block *sb, void *data)
struct inode *inode = NULL;
int ret;
+ lock_kernel();
+
_enter("");
/* allocate a superblock info record */
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
if (!as) {
_leave(" = -ENOMEM");
+ unlock_kernel();
return -ENOMEM;
}
@@ -329,6 +332,7 @@ static int afs_fill_super(struct super_block *sb, void *data)
sb->s_root = root;
_leave(" = 0");
+ unlock_kernel();
return 0;
error_inode:
@@ -342,6 +346,7 @@ error:
sb->s_fs_info = NULL;
_leave(" = %d", ret);
+ unlock_kernel();
return ret;
}
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 69c8142..3adaba9 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -323,6 +323,8 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
struct autofs_sb_info *sbi;
struct autofs_info *ino;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto fail_unlock;
@@ -418,6 +420,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
* Success! Install the root dentry now to indicate completion.
*/
s->s_root = root;
+ unlock_kernel();
return 0;
/*
@@ -439,6 +442,7 @@ fail_free:
kfree(sbi);
s->s_fs_info = NULL;
fail_unlock:
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 33baf27..f2aa193 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -759,6 +759,8 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
const unsigned long sb_block = 0;
const off_t x86_sb_off = 512;
+ lock_kernel();
+
save_mount_options(sb, data);
sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
@@ -867,6 +869,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
befs_sb->nls = load_nls_default();
}
+ unlock_kernel();
return 0;
/*****************/
unacquire_bh:
@@ -877,6 +880,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
unacquire_none:
sb->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 6f60336..4bff506 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -356,9 +356,13 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
long ret = -EINVAL;
unsigned long i_sblock, i_eblock, i_eoff, s_size;
+ lock_kernel();
+
info = kzalloc(sizeof(*info), GFP_KERNEL);
- if (!info)
+ if (!info) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = info;
sb_set_blocksize(s, BFS_BSIZE);
@@ -463,6 +467,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
kfree(info->si_imap);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return -EIO;
}
@@ -484,12 +489,14 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
}
dump_imap("read_super", s);
mutex_init(&info->bfs_lock);
+ unlock_kernel();
return 0;
out:
brelse(bh);
kfree(info);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c4e8353..c8b4f45 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -28,6 +28,7 @@
#include <linux/mount.h>
#include <linux/syscalls.h>
#include <linux/fs.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include <asm/uaccess.h>
@@ -695,9 +696,13 @@ static int bm_fill_super(struct super_block * sb, void * data, int silent)
[3] = {"register", &bm_register_operations, S_IWUSR},
/* last one */ {""}
};
- int err = simple_fill_super(sb, 0x42494e4d, bm_files);
+ int err;
+
+ lock_kernel();
+ err = simple_fill_super(sb, 0x42494e4d, bm_files);
if (!err)
sb->s_op = &s_ops;
+ unlock_kernel();
return err;
}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 752a546..e5cd2cf 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -480,13 +480,17 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
fmode_t mode = FMODE_READ;
int error = 0;
+ lock_kernel();
+
if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
error = btrfs_parse_early_options(data, mode, fs_type,
&subvol_name, &fs_devices);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
error = btrfs_scan_one_device(dev_name, mode, fs_type, &fs_devices);
if (error)
@@ -555,6 +559,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
mnt->mnt_root = root;
kfree(subvol_name);
+ unlock_kernel();
return 0;
error_s:
@@ -563,6 +568,7 @@ error_close_devices:
btrfs_close_devices(fs_devices);
error_free_subvol_name:
kfree(subvol_name);
+ unlock_kernel();
return error;
}
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 9a5e4f5..09ccb9d 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -596,22 +596,30 @@ cifs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
int rc;
- struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
+ struct super_block *sb;
+
+ lock_kernel();
+
+ sb = sget(fs_type, NULL, set_anon_super, NULL);
cFYI(1, ("Devname: %s flags: %d ", dev_name, flags));
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
sb->s_flags = flags;
rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
if (rc) {
deactivate_locked_super(sb);
+ unlock_kernel();
return rc;
}
sb->s_flags |= MS_ACTIVE;
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 830f51a..d081fc5 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -147,6 +147,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
int error;
int idx;
+ lock_kernel();
+
idx = get_device_index((struct coda_mount_data *) data);
/* Ignore errors in data, for backward compatibility */
@@ -158,11 +160,13 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
vc = &coda_comms[idx];
if (!vc->vc_inuse) {
printk("coda_read_super: No pseudo device\n");
+ unlock_kernel();
return -EINVAL;
}
if ( vc->vc_sb ) {
printk("coda_read_super: Device already mounted\n");
+ unlock_kernel();
return -EBUSY;
}
@@ -196,7 +200,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root = d_alloc_root(root);
if (!sb->s_root)
goto error;
- return 0;
+ unlock_kernel();
+ return 0;
error:
if (root)
@@ -204,6 +209,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
if (vc)
vc->vc_sb = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 8421cea..5b2e06e 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -71,6 +71,8 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = CONFIGFS_MAGIC;
@@ -87,6 +89,7 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
inc_nlink(inode);
} else {
pr_debug("configfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -94,12 +97,14 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
config_group_init(&configfs_root_group);
configfs_root_group.cg_item.ci_dentry = root;
root->d_fsdata = &configfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index dd3634e..13e696a 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -227,11 +227,15 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
struct cramfs_sb_info *sbi;
struct inode *root;
+ lock_kernel();
+
sb->s_flags |= MS_RDONLY;
sbi = kzalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* Invalidate the read buffers on mount: think disk change.. */
@@ -308,10 +312,12 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
iput(root);
goto out;
}
+ unlock_kernel();
return 0;
out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index d5f8c96..e206eef 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -24,6 +24,7 @@
#include <linux/parser.h>
#include <linux/fsnotify.h>
#include <linux/seq_file.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define DEVPTS_DEFAULT_MODE 0600
/*
@@ -363,17 +364,23 @@ static int devpts_get_sb(struct file_system_type *fs_type,
struct pts_mount_opts opts;
struct super_block *s;
+ lock_kernel();
+
error = parse_mount_options(data, PARSE_MOUNT, &opts);
- if (error)
+ if (error) {
+ unlock_kernel();
return error;
+ }
if (opts.newinstance)
s = sget(fs_type, NULL, set_anon_super, NULL);
else
s = sget(fs_type, compare_init_pts_sb, set_anon_super, NULL);
- if (IS_ERR(s))
+ if (IS_ERR(s)) {
+ unlock_kernel();
return PTR_ERR(s);
+ }
if (!s->s_root) {
s->s_flags = flags;
@@ -391,6 +398,7 @@ static int devpts_get_sb(struct file_system_type *fs_type,
if (error)
goto out_dput;
+ unlock_kernel();
return 0;
out_dput:
@@ -398,6 +406,7 @@ out_dput:
out_undo_sget:
deactivate_locked_super(s);
+ unlock_kernel();
return error;
}
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index c6ac85d..01c355e 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -36,6 +36,7 @@
#include <linux/parser.h>
#include <linux/fs_stack.h>
#include <linux/ima.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "ecryptfs_kernel.h"
/**
@@ -600,6 +601,8 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
int rc;
struct super_block *sb;
+ lock_kernel();
+
rc = get_sb_nodev(fs_type, flags, raw_data, ecryptfs_fill_super, mnt);
if (rc < 0) {
printk(KERN_ERR "Getting sb failed; rc = [%d]\n", rc);
@@ -621,6 +624,7 @@ out_abort:
dput(sb->s_root); /* aka mnt->mnt_root, as set by get_sb_nodev() */
deactivate_locked_super(sb);
out:
+ unlock_kernel();
return rc;
}
diff --git a/fs/efs/super.c b/fs/efs/super.c
index f049428..0981141 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -249,9 +249,13 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
struct inode *root;
int ret = -EINVAL;
- sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
- if (!sb)
+ lock_kernel();
+
+ sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
+ if (!sb) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sb;
s->s_magic = EFS_SUPER_MAGIC;
@@ -319,12 +323,14 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
goto out_no_fs;
}
+ unlock_kernel();
return 0;
out_no_fs_ul:
out_no_fs:
s->s_fs_info = NULL;
kfree(sb);
+ unlock_kernel();
return ret;
}
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 9f500de..ea045b8 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -297,9 +297,13 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
struct osd_obj_id obj;
int ret;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
/* use mount options to fill superblock */
@@ -399,6 +403,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
out:
if (or)
osd_end_request(or);
+ unlock_kernel();
return ret;
free_sbi:
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 1a9ffee..5af1775 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -745,15 +745,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
+ err = -ENOMEM;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
- return -ENOMEM;
+ goto failed_unlock;
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
- return -ENOMEM;
+ goto failed_unlock;
}
sb->s_fs_info = sbi;
sbi->s_sb_block = sb_block;
@@ -1063,6 +1066,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
ext2_warning(sb, __func__,
"mounting ext3 filesystem as ext2");
ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+ unlock_kernel();
return 0;
cantfind_ext2:
@@ -1086,6 +1090,8 @@ failed_sbi:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
+failed_unlock:
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 7a520a8..38261a5 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1568,14 +1568,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
__le32 features;
int err;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -1992,6 +1997,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
"writeback");
lock_kernel();
+ unlock_kernel();
return 0;
cantfind_ext3:
@@ -2022,6 +2028,7 @@ out_fail:
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
lock_kernel();
+ unlock_kernel();
return ret;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 312211e..9db81d2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2328,14 +2328,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
int err;
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_blockgroup_lock =
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
if (!sbi->s_blockgroup_lock) {
kfree(sbi);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_fs_info = sbi;
@@ -2913,7 +2918,6 @@ no_journal:
ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr);
- lock_kernel();
return 0;
cantfind_ext4:
@@ -2959,7 +2963,6 @@ out_fail:
sb->s_fs_info = NULL;
kfree(sbi->s_blockgroup_lock);
kfree(sbi);
- lock_kernel();
return ret;
}
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index bbc94ae..e2b0b97 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -9,6 +9,7 @@
#include <linux/module.h>
#include <linux/time.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "fat.h"
/* Characters that are undesirable in an MS-DOS file name */
@@ -662,12 +663,16 @@ static int msdos_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
sb->s_flags |= MS_NOATIME;
sb->s_root->d_op = &msdos_dentry_operations;
+ unlock_kernel();
return 0;
}
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index f565f24..365e2d5 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -21,6 +21,7 @@
#include <linux/slab.h>
#include <linux/buffer_head.h>
#include <linux/namei.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "fat.h"
/*
@@ -1044,15 +1045,19 @@ static int vfat_fill_super(struct super_block *sb, void *data, int silent)
{
int res;
+ lock_kernel();
res = fat_fill_super(sb, data, silent, &vfat_dir_inode_operations, 1);
- if (res)
+ if (res) {
+ unlock_kernel();
return res;
+ }
if (MSDOS_SB(sb)->options.name_check != 's')
sb->s_root->d_op = &vfat_ci_dentry_ops;
else
sb->s_root->d_op = &vfat_dentry_ops;
+ unlock_kernel();
return 0;
}
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index 1e8af93..b8b7821 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -148,7 +148,7 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data)
* The superblock on success, else %NULL.
*
* Locking:
- * We are under the bkl and @sbp->s_lock.
+ * We are under @sbp->s_lock.
*/
static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
{
@@ -159,11 +159,14 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
struct inode *root;
int ret = -EINVAL;
+ lock_kernel();
+
sbp->s_flags |= MS_RDONLY;
infp = kzalloc(sizeof(*infp), GFP_KERNEL);
if (!infp) {
printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -236,6 +239,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
goto out_free_ilist;
}
+ unlock_kernel();
return 0;
out_free_ilist:
@@ -245,6 +249,7 @@ out_free_ilist:
out:
brelse(bp);
kfree(infp);
+ unlock_kernel();
return ret;
}
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 3773fd6..8d769f7 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -10,6 +10,7 @@
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/smp_lock.h> /* just for lock_kernel() */
#define FUSE_CTL_SUPER_MAGIC 0x65735543
@@ -297,9 +298,13 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
struct fuse_conn *fc;
int err;
+ lock_kernel();
+
err = simple_fill_super(sb, FUSE_CTL_SUPER_MAGIC, &empty_descr);
- if (err)
+ if (err) {
+ unlock_kernel();
return err;
+ }
mutex_lock(&fuse_mutex);
BUG_ON(fuse_control_sb);
@@ -309,10 +314,12 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
if (err) {
fuse_control_sb = NULL;
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return err;
}
}
mutex_unlock(&fuse_mutex);
+ unlock_kernel();
return 0;
}
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1a822ce..5690279 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -20,6 +20,7 @@
#include <linux/random.h>
#include <linux/sched.h>
#include <linux/exportfs.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
MODULE_DESCRIPTION("Filesystem in Userspace");
@@ -919,6 +920,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
int err;
int is_bdev = sb->s_bdev != NULL;
+ lock_kernel();
+
err = -EINVAL;
if (sb->s_flags & MS_MANDLOCK)
goto err;
@@ -1022,6 +1025,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
fuse_send_init(fc, init_req);
+ unlock_kernel();
return 0;
err_unlock:
@@ -1036,6 +1040,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
err_fput:
fput(file);
err:
+ unlock_kernel();
return err;
}
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 52fb6c0..96c58ad 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -18,6 +18,7 @@
#include <linux/mount.h>
#include <linux/gfs2_ondisk.h>
#include <linux/slow-work.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "gfs2.h"
#include "incore.h"
@@ -1120,9 +1121,12 @@ static int fill_super(struct super_block *sb, void *data, int silent)
struct gfs2_holder mount_gh;
int error;
+ lock_kernel();
+
sdp = init_sbd(sb);
if (!sdp) {
printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -1211,6 +1215,7 @@ static int fill_super(struct super_block *sb, void *data, int silent)
gfs2_glock_dq_uninit(&mount_gh);
gfs2_online_uevent(sdp);
+ unlock_kernel();
return 0;
fail_threads:
@@ -1240,6 +1245,7 @@ fail:
gfs2_delete_debugfs_file(sdp);
kfree(sdp);
sb->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
@@ -1268,10 +1274,12 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
struct path path;
int error;
+ lock_kernel();
error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
if (error) {
printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
dev_name, error);
+ unlock_kernel();
return error;
}
s = sget(&gfs2_fs_type, test_meta_super, set_meta_super,
@@ -1279,11 +1287,13 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
path_put(&path);
if (IS_ERR(s)) {
printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
+ unlock_kernel();
return PTR_ERR(s);
}
sdp = s->s_fs_info;
mnt->mnt_sb = s;
mnt->mnt_root = dget(sdp->sd_master_dir);
+ unlock_kernel();
return 0;
}
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index f7fcbe4..a2e19ff 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -381,9 +381,13 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *root_inode;
int res;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -429,6 +433,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root->d_op = &hfs_dentry_operations;
/* everything's okay */
+ unlock_kernel();
return 0;
bail_iput:
@@ -437,6 +442,7 @@ bail_no_root:
printk(KERN_ERR "hfs: get root inode failed.\n");
bail:
hfs_mdb_put(sb);
+ unlock_kernel();
return res;
}
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 43022f3..824f57a 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -312,9 +312,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
struct nls_table *nls = NULL;
int err = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
INIT_HLIST_HEAD(&sbi->rsrc_inodes);
@@ -459,11 +463,13 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
out:
unload_nls(sbi->nls);
sbi->nls = nls;
+ unlock_kernel();
return 0;
cleanup:
hfsplus_put_super(sb);
unload_nls(nls);
+ unlock_kernel();
return err;
}
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 032604e..5eb2c26 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -968,6 +968,8 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
char *host_root_path, *req_root = d;
int err;
+ lock_kernel();
+
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = HOSTFS_SUPER_MAGIC;
@@ -1016,6 +1018,7 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
goto out;
}
+ unlock_kernel();
return 0;
out_put:
@@ -1023,6 +1026,7 @@ out_put:
out_free:
kfree(host_root_path);
out:
+ unlock_kernel();
return err;
}
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2feaa0..a7b348a 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -477,11 +477,15 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
int o;
+ lock_kernel();
+
save_mount_options(s, options);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
sbi->sb_bmp_dir = NULL;
@@ -666,6 +670,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
root->i_blocks = 5;
hpfs_brelse4(&qbh);
}
+ unlock_kernel();
return 0;
bail4: brelse(bh2);
@@ -677,6 +682,7 @@ bail0:
kfree(sbi->sb_cp_table);
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index a5089a6..6263973 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -712,6 +712,8 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
struct vfsmount *proc_mnt;
int err = -ENOENT;
+ lock_kernel();
+
proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
if (IS_ERR(proc_mnt))
goto out;
@@ -731,6 +733,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
if (!sb->s_root)
goto out_iput;
+ unlock_kernel();
return 0;
out_iput:
@@ -738,6 +741,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
out_mntput:
mntput(proc_mnt);
out:
+ unlock_kernel();
return(err);
}
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 87a1258..53be2b9 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -32,6 +32,7 @@
#include <linux/security.h>
#include <linux/ima.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -824,6 +825,7 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
struct hugetlbfs_config config;
struct hugetlbfs_sb_info *sbinfo;
+ lock_kernel();
save_mount_options(sb, data);
config.nr_blocks = -1; /* No limit on size by default */
@@ -833,12 +835,16 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
config.mode = 0755;
config.hstate = &default_hstate;
ret = hugetlbfs_parse_options(data, &config);
- if (ret)
+ if (ret) {
+ unlock_kernel();
return ret;
+ }
sbinfo = kmalloc(sizeof(struct hugetlbfs_sb_info), GFP_KERNEL);
- if (!sbinfo)
+ if (!sbinfo) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbinfo;
sbinfo->hstate = config.hstate;
spin_lock_init(&sbinfo->stat_lock);
@@ -863,9 +869,11 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
goto out_free;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
out_free:
kfree(sbinfo);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 6b4dcd4..7c501d5 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -571,11 +571,15 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
int table, error = -EINVAL;
unsigned int vol_desc_start;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
if (!parse_options((char *)data, &opt))
@@ -895,6 +899,7 @@ root_found:
kfree(opt.iocharset);
+ unlock_kernel();
return 0;
/*
@@ -934,6 +939,7 @@ out_freesbi:
kfree(opt.iocharset);
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return error;
}
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 9a80e8e..622bd51 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -148,14 +148,19 @@ static const struct super_operations jffs2_super_operations =
static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
{
struct jffs2_sb_info *c;
+ int ret;
+
+ lock_kernel();
D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():"
" New superblock for device %d (\"%s\")\n",
sb->s_mtd->index, sb->s_mtd->name));
c = kzalloc(sizeof(*c), GFP_KERNEL);
- if (!c)
+ if (!c) {
+ unlock_kernel();
return -ENOMEM;
+ }
c->mtd = sb->s_mtd;
c->os_priv = sb;
@@ -177,7 +182,9 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
#endif
- return jffs2_do_fill_super(sb, data, silent);
+ ret = jffs2_do_fill_super(sb, data, silent);
+ unlock_kernel();
+ return ret;
}
static int jffs2_get_sb(struct file_system_type *fs_type,
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 2234c73..329d7b6 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -425,14 +425,20 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
s64 newLVSize = 0;
int flag, ret = -EINVAL;
+ lock_kernel();
+
jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
- if (!new_valid_dev(sb->s_bdev->bd_dev))
+ if (!new_valid_dev(sb->s_bdev->bd_dev)) {
+ unlock_kernel();
return -EOVERFLOW;
+ }
sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
sbi->sb = sb;
sbi->uid = sbi->gid = sbi->umask = -1;
@@ -442,6 +448,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
sbi->flag = flag;
@@ -452,6 +459,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
if (newLVSize) {
printk(KERN_ERR "resize option for remount only\n");
+ unlock_kernel();
return -EINVAL;
}
@@ -527,6 +535,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
#endif
sb->s_time_gran = 1;
+ unlock_kernel();
return 0;
out_no_root:
@@ -548,6 +557,7 @@ out_kfree:
if (sbi->nls_tab)
unload_nls(sbi->nls_tab);
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/libfs.c b/fs/libfs.c
index 219576c..3484040 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -11,6 +11,7 @@
#include <linux/exportfs.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
@@ -422,6 +423,8 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
struct dentry *dentry;
int i;
+ lock_kernel();
+
s->s_blocksize = PAGE_CACHE_SIZE;
s->s_blocksize_bits = PAGE_CACHE_SHIFT;
s->s_magic = magic;
@@ -429,8 +432,10 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
s->s_time_gran = 1;
inode = new_inode(s);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
/*
* because the root inode is 1, the files array must not contain an
* entry at index 1
@@ -444,6 +449,7 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
for (i = 0; !files->name || files->name[0]; i++, files++) {
@@ -469,10 +475,12 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
d_add(dentry, inode);
}
s->s_root = root;
+ unlock_kernel();
return 0;
out:
d_genocide(root);
dput(root);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 74ea82d..b8aa0a6 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -147,9 +147,13 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
struct minix_sb_info *sbi;
int ret = -EINVAL;
+ lock_kernel();
+
sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = sbi;
BUILD_BUG_ON(32 != sizeof (struct minix_inode));
@@ -265,6 +269,7 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
else if (sbi->s_mount_state & MINIX_ERROR_FS)
printk("MINIX-fs: mounting file system with errors, "
"running fsck is recommended\n");
+ unlock_kernel();
return 0;
out_iput:
@@ -314,6 +319,7 @@ out_bad_sb:
out:
s->s_fs_info = NULL;
kfree(sbi);
+ unlock_kernel();
return ret;
}
diff --git a/fs/namespace.c b/fs/namespace.c
index bdc3cb4..3f95497 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1647,9 +1647,7 @@ static int do_new_mount(struct path *path, char *type, int flags,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- lock_kernel();
mnt = do_kern_mount(type, flags, name, data);
- unlock_kernel();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index cf98da1..a020d86 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -445,10 +445,14 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
#endif
struct ncp_entry_info finfo;
+ lock_kernel();
+
data.wdog_pid = NULL;
server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
- if (!server)
+ if (!server) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = server;
error = -EFAULT;
@@ -695,6 +699,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
if (!sb->s_root)
goto out_no_root;
sb->s_root->d_op = &ncp_root_dentry_operations;
+ unlock_kernel();
return 0;
out_no_root:
@@ -729,6 +734,7 @@ out:
put_pid(data.wdog_pid);
sb->s_fs_info = NULL;
kfree(server);
+ unlock_kernel();
return error;
}
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 90be551..65812a9 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2107,6 +2107,7 @@ static int nfs_get_sb(struct file_system_type *fs_type,
};
int error = -ENOMEM;
+ lock_kernel();
data = nfs_alloc_parsed_mount_data(3);
mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
if (data == NULL || mntfh == NULL)
@@ -2184,6 +2185,7 @@ out:
out_free_fh:
kfree(mntfh);
kfree(data);
+ unlock_kernel();
return error;
out_err_nosb:
@@ -2227,6 +2229,8 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs_xdev_get_sb()\n");
/* create a new volume representation */
@@ -2281,17 +2285,20 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs_xdev_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2475,6 +2482,7 @@ static int nfs4_remote_get_sb(struct file_system_type *fs_type,
};
int error = -ENOMEM;
+ lock_kernel();
mntfh = kzalloc(sizeof(*mntfh), GFP_KERNEL);
if (data == NULL || mntfh == NULL)
goto out_free_fh;
@@ -2534,6 +2542,7 @@ out:
security_free_mnt_opts(&data->lsm_opts);
out_free_fh:
kfree(mntfh);
+ unlock_kernel();
return error;
out_free:
@@ -2660,6 +2669,7 @@ static int nfs4_get_sb(struct file_system_type *fs_type,
struct nfs_parsed_mount_data *data;
int error = -ENOMEM;
+ lock_kernel();
data = nfs_alloc_parsed_mount_data(4);
if (data == NULL)
goto out_free_data;
@@ -2680,6 +2690,7 @@ out_free_data:
kfree(data);
dprintk("<-- nfs4_get_sb() = %d%s\n", error,
error != 0 ? " [error]" : "");
+ unlock_kernel();
return error;
}
@@ -2712,6 +2723,8 @@ static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs4_xdev_get_sb()\n");
/* create a new volume representation */
@@ -2765,17 +2778,20 @@ static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs4_xdev_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2794,6 +2810,8 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
};
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
/* create a new volume representation */
@@ -2847,17 +2865,20 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type,
security_sb_clone_mnt_opts(data->sb, s);
dprintk("<-- nfs4_referral_get_sb() = 0\n");
+ unlock_kernel();
return 0;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
+ unlock_kernel();
return error;
error_splat_super:
deactivate_locked_super(s);
dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
+ unlock_kernel();
return error;
}
@@ -2873,6 +2894,8 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
struct vfsmount *root_mnt;
int error;
+ lock_kernel();
+
dprintk("--> nfs4_referral_get_sb()\n");
export_path = data->mnt_path;
@@ -2890,6 +2913,7 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
out:
dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error,
error != 0 ? " [error]" : "");
+ unlock_kernel();
return error;
}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 5c01fc1..9c6917d 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -26,6 +26,7 @@
#include <linux/inet.h>
#include <linux/string.h>
#include <linux/ctype.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include <linux/nfs.h>
#include <linux/nfsd_idmap.h>
@@ -1347,7 +1348,12 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
#endif
/* last one */ {""}
};
- return simple_fill_super(sb, 0x6e667364, nfsd_files);
+ int ret;
+
+ lock_kernel();
+ ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
+ unlock_kernel();
+ return ret;
}
static int nfsd_get_sb(struct file_system_type *fs_type,
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 644e667..3448ec3 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1059,9 +1059,13 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
struct the_nilfs *nilfs;
int err, need_to_close = 1;
+ lock_kernel();
+
sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type);
- if (IS_ERR(sd.bdev))
+ if (IS_ERR(sd.bdev)) {
+ unlock_kernel();
return PTR_ERR(sd.bdev);
+ }
/*
* To get mount instance using sget() vfs-routine, NILFS needs
@@ -1142,6 +1146,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
if (need_to_close)
close_bdev_exclusive(sd.bdev, flags);
simple_set_mnt(mnt, s);
+ unlock_kernel();
return 0;
failed_unlock:
@@ -1150,6 +1155,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
failed:
close_bdev_exclusive(sd.bdev, flags);
+ unlock_kernel();
return err;
cancel_new:
@@ -1163,6 +1169,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
* We must finish all post-cleaning before this call;
* put_nilfs() needs the block device.
*/
+ unlock_kernel();
return err;
}
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 80b0477..ab09c02 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2723,6 +2723,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
struct inode *tmp_ino;
int blocksize, result;
+ lock_kernel();
+
/*
* We do a pretty difficult piece of bootstrap by reading the
* MFT (and other metadata) from disk into memory. We'll only
@@ -2746,6 +2748,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Allocation of NTFS volume structure "
"failed. Aborting mount...");
lockdep_on();
+ unlock_kernel();
return -ENOMEM;
}
/* Initialize ntfs_volume structure. */
@@ -2933,6 +2936,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
sb->s_export_op = &ntfs_export_ops;
lock_kernel();
lockdep_on();
+ unlock_kernel();
return 0;
}
ntfs_error(sb, "Failed to allocate root directory.");
@@ -3053,6 +3057,7 @@ err_out_now:
kfree(vol);
ntfs_debug("Failed, returning -EINVAL.");
lockdep_on();
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ocfs2/dlm/dlmfs.c b/fs/ocfs2/dlm/dlmfs.c
index 02bf178..670f0fd 100644
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlm/dlmfs.c
@@ -43,6 +43,7 @@
#include <linux/init.h>
#include <linux/string.h>
#include <linux/backing-dev.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include <asm/uaccess.h>
@@ -528,21 +529,27 @@ static int dlmfs_fill_super(struct super_block * sb,
struct inode * inode;
struct dentry * root;
+ lock_kernel();
+
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = DLMFS_MAGIC;
sb->s_op = &dlmfs_ops;
inode = dlmfs_get_root_inode(sb);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index c0e48ae..fab815f 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -986,6 +986,8 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
char nodestr[8];
struct ocfs2_blockcheck_stats stats;
+ lock_kernel();
+
mlog_entry("%p, %p, %i", sb, data, silent);
if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
@@ -1172,6 +1174,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
atomic_set(&osb->vol_state, VOLUME_DISABLED);
wake_up(&osb->osb_mount_event);
mlog_exit(status);
+ unlock_kernel();
return status;
}
}
@@ -1186,6 +1189,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
ocfs2_orphan_scan_start(osb);
mlog_exit(status);
+ unlock_kernel();
return status;
read_super_error:
@@ -1201,6 +1205,7 @@ read_super_error:
}
mlog_exit(status);
+ unlock_kernel();
return status;
}
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index f3b7c15..ddfbb22 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -416,11 +416,15 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
sector_t start;
int ret = -EINVAL;
+ lock_kernel();
+
save_mount_options(sb, (char *) data);
sbi = kzalloc(sizeof(struct omfs_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -525,6 +529,7 @@ out_brelse_bh2:
out_brelse_bh:
brelse(bh);
end:
+ unlock_kernel();
return ret;
}
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index ffcd04f..50dc4be 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -386,6 +386,8 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
struct op_inode_info *oi;
int ret;
+ lock_kernel();
+
s->s_flags |= MS_NOATIME;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
@@ -405,6 +407,7 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent)
s->s_root = d_alloc_root(root_inode);
if (!s->s_root)
goto out_no_root_dentry;
+ unlock_kernel();
return 0;
out_no_root_dentry:
@@ -412,6 +415,7 @@ out_no_root_dentry:
ret = -ENOMEM;
out_no_root:
printk("openprom_fill_super: get root inode failed\n");
+ unlock_kernel();
return ret;
}
diff --git a/fs/proc/root.c b/fs/proc/root.c
index b080b79..6384680 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -18,6 +18,7 @@
#include <linux/bitops.h>
#include <linux/mount.h>
#include <linux/pid_namespace.h>
+#include <linux/smp_lock.h> /* For lock_kernel() only */
#include "internal.h"
@@ -43,6 +44,8 @@ static int proc_get_sb(struct file_system_type *fs_type,
struct pid_namespace *ns;
struct proc_inode *ei;
+ lock_kernel();
+
if (proc_mnt) {
/* Seed the root directory with a pid so it doesn't need
* to be special in base.c. I would do this earlier but
@@ -60,14 +63,17 @@ static int proc_get_sb(struct file_system_type *fs_type,
ns = current->nsproxy->pid_ns;
sb = sget(fs_type, proc_test_super, proc_set_super, ns);
- if (IS_ERR(sb))
+ if (IS_ERR(sb)) {
+ unlock_kernel();
return PTR_ERR(sb);
+ }
if (!sb->s_root) {
sb->s_flags = flags;
err = proc_fill_super(sb);
if (err) {
deactivate_locked_super(sb);
+ unlock_kernel();
return err;
}
@@ -83,6 +89,7 @@ static int proc_get_sb(struct file_system_type *fs_type,
}
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
}
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index d2cd179..18640ce 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -253,9 +253,13 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
struct qnx4_sb_info *qs;
int ret = -EINVAL;
+ lock_kernel();
+
qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
- if (!qs)
+ if (!qs) {
+ unlock_kernel();
return -ENOMEM;
+ }
s->s_fs_info = qs;
sb_set_blocksize(s, QNX4_BLOCK_SIZE);
@@ -303,6 +307,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
brelse(bh);
+ unlock_kernel();
return 0;
outi:
@@ -312,6 +317,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
outnobh:
kfree(qs);
s->s_fs_info = NULL;
+ unlock_kernel();
return ret;
}
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index a6090aa..9b3983f 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -35,6 +35,7 @@
#include <linux/sched.h>
#include <linux/parser.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include <asm/uaccess.h>
#include "internal.h"
@@ -220,6 +221,8 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
struct dentry *root;
int err;
+ lock_kernel();
+
save_mount_options(sb, data);
fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL);
@@ -253,11 +256,13 @@ static int ramfs_fill_super(struct super_block * sb, void * data, int silent)
goto fail;
}
+ unlock_kernel();
return 0;
fail:
kfree(fsi);
sb->s_fs_info = NULL;
iput(inode);
+ unlock_kernel();
return err;
}
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index f0ad05f..f32bf62 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1608,6 +1608,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
char *qf_names[MAXQUOTAS] = {};
unsigned int qfmt = 0;
+ lock_kernel();
+
save_mount_options(s, data);
sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
@@ -1852,6 +1854,7 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
init_waitqueue_head(&(sbi->s_wait));
spin_lock_init(&sbi->bitmap_lock);
+ unlock_kernel();
return (0);
error:
@@ -1872,6 +1875,7 @@ error:
kfree(sbi);
s->s_fs_info = NULL;
+ unlock_kernel();
return errval;
}
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index c117fa8..7342617 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -468,6 +468,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
size_t len;
int ret;
+ lock_kernel();
+
#ifdef CONFIG_BLOCK
if (!sb->s_mtd) {
sb_set_blocksize(sb, ROMBSIZE);
@@ -484,8 +486,10 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
/* read the image superblock and check it */
rsb = kmalloc(512, GFP_KERNEL);
- if (!rsb)
+ if (!rsb) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = (void *) 512;
ret = romfs_dev_read(sb, 0, rsb, 512);
@@ -535,15 +539,18 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
if (!sb->s_root)
goto error_i;
+ unlock_kernel();
return 0;
error_i:
iput(root);
error:
+ unlock_kernel();
return -EINVAL;
error_rsb_inval:
ret = -EINVAL;
error_rsb:
+ unlock_kernel();
return ret;
}
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 1c4c8f0..c3c9044 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -500,6 +500,8 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
void *mem;
static int warn_count;
+ lock_kernel();
+
if (warn_count < 5) {
warn_count++;
printk(KERN_EMERG "smbfs is deprecated and will be removed"
@@ -615,6 +617,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
smb_new_dentry(sb->s_root);
+ unlock_kernel();
return 0;
out_no_root:
@@ -635,9 +638,11 @@ out_wrong_data:
out_no_data:
printk(KERN_ERR "smb_fill_super: missing data argument\n");
out_fail:
+ unlock_kernel();
return -EINVAL;
out_no_server:
printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 6c197ef..23cea83 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -78,11 +78,14 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
u64 lookup_table_start;
int err;
+ lock_kernel();
+
TRACE("Entered squashfs_fill_superblock\n");
sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL);
if (sb->s_fs_info == NULL) {
ERROR("Failed to allocate squashfs_sb_info\n");
+ unlock_kernel();
return -ENOMEM;
}
msblk = sb->s_fs_info;
@@ -286,6 +289,7 @@ allocate_root:
TRACE("Leaving squashfs_fill_super\n");
kfree(sblk);
+ unlock_kernel();
return 0;
failed_mount:
@@ -299,12 +303,14 @@ failed_mount:
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
kfree(sblk);
+ unlock_kernel();
return err;
failure:
kfree(msblk->stream.workspace);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 4974995..2e5a870 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* Only for lock_kernel() */
#include "sysfs.h"
@@ -45,6 +46,8 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = SYSFS_MAGIC;
@@ -58,6 +61,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
mutex_unlock(&sysfs_mutex);
if (!inode) {
pr_debug("sysfs: could not get root inode\n");
+ unlock_kernel();
return -ENOMEM;
}
@@ -66,10 +70,12 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
root->d_fsdata = &sysfs_root;
sb->s_root = root;
+ unlock_kernel();
return 0;
}
diff --git a/fs/sysv/super.c b/fs/sysv/super.c
index 5a903da..29cdd3f 100644
--- a/fs/sysv/super.c
+++ b/fs/sysv/super.c
@@ -24,6 +24,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "sysv.h"
/*
@@ -357,7 +358,9 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
struct sysv_sb_info *sbi;
unsigned long blocknr;
int size = 0, i;
-
+
+ lock_kernel();
+
BUILD_BUG_ON(1024 != sizeof (struct xenix_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv4_super_block));
BUILD_BUG_ON(512 != sizeof (struct sysv2_super_block));
@@ -365,8 +368,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
BUILD_BUG_ON(64 != sizeof (struct sysv_inode));
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -409,8 +414,10 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
if (bh && bh1) {
sbi->s_bh1 = bh1;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, size))
+ if (complete_read_super(sb, silent, size)) {
+ unlock_kernel();
return 0;
+ }
}
brelse(bh1);
@@ -419,6 +426,7 @@ static int sysv_fill_super(struct super_block *sb, void *data, int silent)
printk("oldfs: cannot read superblock\n");
failed:
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
Eunknown:
@@ -442,14 +450,18 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
struct v7_super_block *v7sb;
struct sysv_inode *v7i;
+ lock_kernel();
+
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad i-node size");
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbi->s_sb = sb;
sbi->s_block_base = 0;
@@ -487,13 +499,16 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_bh1 = bh;
sbi->s_bh2 = bh;
- if (complete_read_super(sb, silent, 1))
+ if (complete_read_super(sb, silent, 1)) {
+ unlock_kernel();
return 0;
+ }
failed:
brelse(bh2);
brelse(bh);
kfree(sbi);
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 333e181..04a0fc9 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2029,6 +2029,8 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
struct super_block *sb;
int err;
+ lock_kernel();
+
dbg_gen("name %s, flags %#x", name, flags);
/*
@@ -2040,6 +2042,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
if (IS_ERR(ubi)) {
ubifs_err("cannot open \"%s\", error %d",
name, (int)PTR_ERR(ubi));
+ unlock_kernel();
return PTR_ERR(ubi);
}
ubi_get_volume_info(ubi, &vi);
@@ -2077,12 +2080,14 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
ubi_close_volume(ubi);
simple_set_mnt(mnt, sb);
+ unlock_kernel();
return 0;
out_deact:
deactivate_locked_super(sb);
out_close:
ubi_close_volume(ubi);
+ unlock_kernel();
return err;
}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9d1b8c2..fa6f8db 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1866,6 +1866,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
struct kernel_lb_addr rootdir, fileset;
struct udf_sb_info *sbi;
+ lock_kernel();
+
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
uopt.uid = -1;
uopt.gid = -1;
@@ -1874,8 +1876,10 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
uopt.dmode = UDF_INVALID_MODE;
sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
- if (!sbi)
+ if (!sbi) {
+ unlock_kernel();
return -ENOMEM;
+ }
sb->s_fs_info = sbi;
@@ -2021,6 +2025,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
goto error_out;
}
sb->s_maxbytes = MAX_LFS_FILESIZE;
+ unlock_kernel();
return 0;
error_out:
@@ -2041,6 +2046,7 @@ error_out:
kfree(sbi);
sb->s_fs_info = NULL;
+ unlock_kernel();
return -EINVAL;
}
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 5faed79..31ad198 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -646,6 +646,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
unsigned maxsymlen;
int ret = -EINVAL;
+ lock_kernel();
+
uspi = NULL;
ubh = NULL;
flags = 0;
@@ -1107,6 +1109,7 @@ magic_found:
goto failed;
UFSD("EXIT\n");
+ unlock_kernel();
return 0;
dalloc_failed:
@@ -1118,10 +1121,12 @@ failed:
kfree(sbi);
sb->s_fs_info = NULL;
UFSD("EXIT (FAILED)\n");
+ unlock_kernel();
return ret;
failed_nomem:
UFSD("EXIT (NOMEM)\n");
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 18a4b8e..7426166 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1412,6 +1412,8 @@ xfs_fs_fill_super(
int flags = 0, error = ENOMEM;
char *mtpt = NULL;
+ lock_kernel();
+
mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
if (!mp)
goto out;
@@ -1506,6 +1508,7 @@ xfs_fs_fill_super(
kfree(mtpt);
xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
+ unlock_kernel();
return 0;
out_filestream_unmount:
@@ -1522,6 +1525,7 @@ xfs_fs_fill_super(
kfree(mtpt);
kfree(mp);
out:
+ unlock_kernel();
return -error;
fail_vnrele:
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index ee9d697..fb9d70d 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -33,6 +33,7 @@
#include <linux/pid.h>
#include <linux/ipc_namespace.h>
#include <linux/ima.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include <net/sock.h>
#include "util.h"
@@ -190,6 +191,8 @@ static int mqueue_fill_super(struct super_block *sb, void *data, int silent)
struct ipc_namespace *ns = data;
int error = 0;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = MQUEUE_MAGIC;
@@ -209,6 +212,7 @@ static int mqueue_fill_super(struct super_block *sb, void *data, int silent)
}
out:
+ unlock_kernel();
return error;
}
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index ca83b73..d3ee2ac 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1290,6 +1290,8 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
struct super_block *sb;
struct cgroupfs_root *new_root;
+ lock_kernel();
+
/* First find the desired set of subsystems */
ret = parse_cgroupfs_options(data, &opts);
if (ret)
@@ -1410,6 +1412,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
simple_set_mnt(mnt, sb);
kfree(opts.release_agent);
kfree(opts.name);
+ unlock_kernel();
return 0;
drop_new_super:
@@ -1417,6 +1420,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
out_err:
kfree(opts.release_agent);
kfree(opts.name);
+ unlock_kernel();
return ret;
}
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index b5cb469..f1f0599 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -53,6 +53,7 @@
#include <linux/time.h>
#include <linux/backing-dev.h>
#include <linux/sort.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>
@@ -237,6 +238,8 @@ static int cpuset_get_sb(struct file_system_type *fs_type,
{
struct file_system_type *cgroup_fs = get_fs_type("cgroup");
int ret = -ENODEV;
+
+ lock_kernel();
if (cgroup_fs) {
char mountopts[] =
"cpuset,noprefix,"
@@ -245,6 +248,7 @@ static int cpuset_get_sb(struct file_system_type *fs_type,
unused_dev_name, mountopts, mnt);
put_filesystem(cgroup_fs);
}
+ unlock_kernel();
return ret;
}
diff --git a/mm/shmem.c b/mm/shmem.c
index 356dd99..98f744b 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -30,6 +30,7 @@
#include <linux/module.h>
#include <linux/swap.h>
#include <linux/ima.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
static struct vfsmount *shm_mnt;
@@ -2309,11 +2310,15 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
struct shmem_sb_info *sbinfo;
int err = -ENOMEM;
+ lock_kernel();
+
/* Round up to L1_CACHE_BYTES to resist false sharing */
sbinfo = kzalloc(max((int)sizeof(struct shmem_sb_info),
L1_CACHE_BYTES), GFP_KERNEL);
- if (!sbinfo)
+ if (!sbinfo) {
+ unlock_kernel();
return -ENOMEM;
+ }
sbinfo->mode = S_IRWXUGO | S_ISVTX;
sbinfo->uid = current_fsuid();
@@ -2363,12 +2368,14 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
if (!root)
goto failed_iput;
sb->s_root = root;
+ unlock_kernel();
return 0;
failed_iput:
iput(inode);
failed:
shmem_put_super(sb);
+ unlock_kernel();
return err;
}
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 49278f8..1f0f730 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -16,6 +16,7 @@
#include <linux/namei.h>
#include <linux/fsnotify.h>
#include <linux/kernel.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include <asm/ioctls.h>
#include <linux/fs.h>
@@ -990,6 +991,8 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
+ lock_kernel();
+
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = RPCAUTH_GSSMAGIC;
@@ -997,20 +1000,25 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
sb->s_time_gran = 1;
inode = rpc_get_inode(sb, S_IFDIR | 0755);
- if (!inode)
+ if (!inode) {
+ unlock_kernel();
return -ENOMEM;
+ }
root = d_alloc_root(inode);
if (!root) {
iput(inode);
+ unlock_kernel();
return -ENOMEM;
}
if (rpc_populate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF, NULL))
goto out;
sb->s_root = root;
+ unlock_kernel();
return 0;
out:
d_genocide(root);
dput(root);
+ unlock_kernel();
return -ENOMEM;
}
diff --git a/security/inode.c b/security/inode.c
index f7496c6..f2d02a5 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -21,6 +21,7 @@
#include <linux/namei.h>
#include <linux/security.h>
#include <linux/magic.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
static struct vfsmount *mount;
static int mount_count;
@@ -125,8 +126,12 @@ static inline int positive(struct dentry *dentry)
static int fill_super(struct super_block *sb, void *data, int silent)
{
static struct tree_descr files[] = {{""}};
+ int res;
- return simple_fill_super(sb, SECURITYFS_MAGIC, files);
+ lock_kernel();
+ res = simple_fill_super(sb, SECURITYFS_MAGIC, files);
+ unlock_kernel();
+ return res;
}
static int get_sb(struct file_system_type *fs_type,
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index b4fc506..1c16ea6 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -28,6 +28,7 @@
#include <linux/percpu.h>
#include <linux/audit.h>
#include <linux/uaccess.h>
+#include <linux/smp_lock.h>
/* selinuxfs pseudo filesystem for exporting the security policy API.
Based on the proc code and the fs/nfsd/nfsctl.c code. */
@@ -1598,6 +1599,9 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
[SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO},
/* last one */ {""}
};
+
+ lock_kernel();
+
ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files);
if (ret)
goto err;
@@ -1690,6 +1694,7 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
policycap_dir = dentry;
out:
+ unlock_kernel();
return ret;
err:
printk(KERN_ERR "SELinux: %s: failed while creating inodes\n",
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index aeead75..ceebf2a 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -26,6 +26,7 @@
#include <linux/seq_file.h>
#include <linux/ctype.h>
#include <linux/audit.h>
+#include <linux/smp_lock.h> /* For lock_kernel() */
#include "smack.h"
/*
@@ -1290,16 +1291,19 @@ static int smk_fill_super(struct super_block *sb, void *data, int silent)
/* last one */ {""}
};
+ lock_kernel();
rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
if (rc != 0) {
printk(KERN_ERR "%s failed %d while creating inodes\n",
__func__, rc);
+ unlock_kernel();
return rc;
}
root_inode = sb->s_root->d_inode;
root_inode->i_security = new_inode_smack(smack_known_floor.smk_known);
+ unlock_kernel();
return 0;
}
--
1.6.4.2
^ permalink raw reply related [flat|nested] 70+ messages in thread* Re: [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
2009-11-02 17:11 ` Jan Blunck
@ 2009-11-03 10:12 ` Christoph Hellwig
2009-11-03 10:25 ` Jan Blunck
0 siblings, 1 reply; 70+ messages in thread
From: Christoph Hellwig @ 2009-11-03 10:12 UTC (permalink / raw)
To: Jan Blunck
Cc: linux-fsdevel, Matthew Wilcox, Linux-Kernel Mailinglist,
Christian Borntraeger
On Mon, Nov 02, 2009 at 06:11:47PM +0100, Jan Blunck wrote:
> Attached is a new version of the patch that includes the changes for
> filesystems outside of fs/ directory as well. Besides that I trimmed the CC
> list this time.
For the next spin please don't push it down to filesystems that
obviously don't need it at all and just mention them in the patch
description. For filesystems like xfs and btrfs that never used the BKL
at all that should make life a bit simpler.
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
2009-11-03 10:12 ` Christoph Hellwig
@ 2009-11-03 10:25 ` Jan Blunck
2009-11-03 14:33 ` Christoph Hellwig
0 siblings, 1 reply; 70+ messages in thread
From: Jan Blunck @ 2009-11-03 10:25 UTC (permalink / raw)
To: Christoph Hellwig
Cc: linux-fsdevel, Matthew Wilcox, Linux-Kernel Mailinglist,
Christian Borntraeger
On Tue, Nov 03, Christoph Hellwig wrote:
> On Mon, Nov 02, 2009 at 06:11:47PM +0100, Jan Blunck wrote:
> > Attached is a new version of the patch that includes the changes for
> > filesystems outside of fs/ directory as well. Besides that I trimmed the CC
> > list this time.
>
> For the next spin please don't push it down to filesystems that
> obviously don't need it at all and just mention them in the patch
> description. For filesystems like xfs and btrfs that never used the BKL
> at all that should make life a bit simpler.
My plan was to remove the BKL in the obvious cases in the followup patches
that are also included in the series. So should I just merge the obvious stuff
into one patch? Christian Borntraeger was actually requesting the opposite. He
wants to be able to bisect it to the patch that is removing the BKL. That
would be much simple with many small patches I think.
Regards,
Jan
--
Jan Blunck <jblunck@suse.de>
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
2009-11-03 10:25 ` Jan Blunck
@ 2009-11-03 14:33 ` Christoph Hellwig
2009-11-03 14:46 ` Arnd Bergmann
0 siblings, 1 reply; 70+ messages in thread
From: Christoph Hellwig @ 2009-11-03 14:33 UTC (permalink / raw)
To: Jan Blunck
Cc: Christoph Hellwig, linux-fsdevel, Matthew Wilcox,
Linux-Kernel Mailinglist, Christian Borntraeger
On Tue, Nov 03, 2009 at 11:25:09AM +0100, Jan Blunck wrote:
> > For the next spin please don't push it down to filesystems that
> > obviously don't need it at all and just mention them in the patch
> > description. For filesystems like xfs and btrfs that never used the BKL
> > at all that should make life a bit simpler.
>
> My plan was to remove the BKL in the obvious cases in the followup patches
> that are also included in the series. So should I just merge the obvious stuff
> into one patch? Christian Borntraeger was actually requesting the opposite. He
> wants to be able to bisect it to the patch that is removing the BKL. That
> would be much simple with many small patches I think.
Yes, but for most filesystems the BKL never made sense. Anywhere where
it's non-obvious (or the maintainer wants it) make it a separate patch,
but don't bother for things like xfs or btrfs.
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 01/27] BKL: Push down BKL from do_new_mount() to the filesystems get_sb/fill_super operation
2009-11-03 14:33 ` Christoph Hellwig
@ 2009-11-03 14:46 ` Arnd Bergmann
0 siblings, 0 replies; 70+ messages in thread
From: Arnd Bergmann @ 2009-11-03 14:46 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jan Blunck, linux-fsdevel, Matthew Wilcox,
Linux-Kernel Mailinglist, Christian Borntraeger
On Tuesday 03 November 2009, Christoph Hellwig wrote:
> On Tue, Nov 03, 2009 at 11:25:09AM +0100, Jan Blunck wrote:
> >
> > My plan was to remove the BKL in the obvious cases in the followup patches
> > that are also included in the series. So should I just merge the obvious stuff
> > into one patch? Christian Borntraeger was actually requesting the opposite. He
> > wants to be able to bisect it to the patch that is removing the BKL. That
> > would be much simple with many small patches I think.
>
> Yes, but for most filesystems the BKL never made sense. Anywhere where
> it's non-obvious (or the maintainer wants it) make it a separate patch,
> but don't bother for things like xfs or btrfs.
>
In order to maintain bisectability, you could first add the explicit BKL
in the file systems where it may be needed and then remove it from the
common code in the final patch, listing all file systems by category
(doesn't need BKL, holds BKL itself) that you looked at.
Shorter series, but same results because of the recursive nature of
the BKL.
Arnd <><
^ permalink raw reply [flat|nested] 70+ messages in thread