From: Gao Xiang <gaoxiang25@huawei.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
<devel@driverdev.osuosl.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
<linux-erofs@lists.ozlabs.org>, "Chao Yu" <chao@kernel.org>,
Miao Xie <miaoxie@huawei.com>, <weidu.du@huawei.com>,
Fang Wei <fangwei1@huawei.com>, Gao Xiang <gaoxiang25@huawei.com>
Subject: [PATCH 11/22] staging: erofs: kill all failure handling in fill_super()
Date: Mon, 29 Jul 2019 14:51:48 +0800 [thread overview]
Message-ID: <20190729065159.62378-12-gaoxiang25@huawei.com> (raw)
In-Reply-To: <20190729065159.62378-1-gaoxiang25@huawei.com>
.kill_sb() will do that instead in order to remove duplicated code.
Note that the initialzation of managed_cache is now moved
after s_root is assigned since it's more preferred to iput()
in .put_super() and all inodes should be evicted before
the end of generic_shutdown_super(sb).
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
---
drivers/staging/erofs/super.c | 121 +++++++++++++++-------------------
1 file changed, 53 insertions(+), 68 deletions(-)
diff --git a/drivers/staging/erofs/super.c b/drivers/staging/erofs/super.c
index bfb6e1e09781..af5d87793e4d 100644
--- a/drivers/staging/erofs/super.c
+++ b/drivers/staging/erofs/super.c
@@ -343,51 +343,52 @@ static const struct address_space_operations managed_cache_aops = {
.invalidatepage = managed_cache_invalidatepage,
};
-static struct inode *erofs_init_managed_cache(struct super_block *sb)
+static int erofs_init_managed_cache(struct super_block *sb)
{
- struct inode *inode = new_inode(sb);
+ struct erofs_sb_info *const sbi = EROFS_SB(sb);
+ struct inode *const inode = new_inode(sb);
if (unlikely(!inode))
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
set_nlink(inode, 1);
inode->i_size = OFFSET_MAX;
inode->i_mapping->a_ops = &managed_cache_aops;
mapping_set_gfp_mask(inode->i_mapping,
- GFP_NOFS | __GFP_HIGHMEM |
- __GFP_MOVABLE | __GFP_NOFAIL);
- return inode;
+ GFP_NOFS | __GFP_HIGHMEM | __GFP_MOVABLE);
+ sbi->managed_cache = inode;
+ return 0;
}
-
+#else
+static int erofs_init_managed_cache(struct super_block *sb) { return 0; }
#endif
static int erofs_fill_super(struct super_block *sb, void *data, int silent)
{
struct inode *inode;
struct erofs_sb_info *sbi;
- int err = -EINVAL;
+ int err;
infoln("fill_super, device -> %s", sb->s_id);
infoln("options -> %s", (char *)data);
+ sb->s_magic = EROFS_SUPER_MAGIC;
+
if (unlikely(!sb_set_blocksize(sb, EROFS_BLKSIZ))) {
errln("failed to set erofs blksize");
- goto err;
+ return -EINVAL;
}
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (unlikely(!sbi)) {
- err = -ENOMEM;
- goto err;
- }
- sb->s_fs_info = sbi;
+ if (unlikely(!sbi))
+ return -ENOMEM;
+ sb->s_fs_info = sbi;
err = superblock_read(sb);
if (err)
- goto err_sbread;
+ return err;
- sb->s_magic = EROFS_SUPER_MAGIC;
sb->s_flags |= SB_RDONLY | SB_NOATIME;
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_time_gran = 1;
@@ -397,13 +398,12 @@ static int erofs_fill_super(struct super_block *sb, void *data, int silent)
#ifdef CONFIG_EROFS_FS_XATTR
sb->s_xattr = erofs_xattr_handlers;
#endif
-
/* set erofs default mount options */
default_options(sbi);
err = parse_options(sb, data);
- if (err)
- goto err_parseopt;
+ if (unlikely(err))
+ return err;
if (!silent)
infoln("root inode @ nid %llu", ROOT_NID(sbi));
@@ -417,93 +417,78 @@ static int erofs_fill_super(struct super_block *sb, void *data, int silent)
INIT_RADIX_TREE(&sbi->workstn_tree, GFP_ATOMIC);
#endif
-#ifdef EROFS_FS_HAS_MANAGED_CACHE
- sbi->managed_cache = erofs_init_managed_cache(sb);
- if (IS_ERR(sbi->managed_cache)) {
- err = PTR_ERR(sbi->managed_cache);
- goto err_init_managed_cache;
- }
-#endif
-
/* get the root inode */
inode = erofs_iget(sb, ROOT_NID(sbi), true);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- goto err_iget;
- }
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
- if (!S_ISDIR(inode->i_mode)) {
+ if (unlikely(!S_ISDIR(inode->i_mode))) {
errln("rootino(nid %llu) is not a directory(i_mode %o)",
ROOT_NID(sbi), inode->i_mode);
- err = -EINVAL;
iput(inode);
- goto err_iget;
+ return -EINVAL;
}
sb->s_root = d_make_root(inode);
- if (!sb->s_root) {
- err = -ENOMEM;
- goto err_iget;
- }
+ if (unlikely(!sb->s_root))
+ return -ENOMEM;
erofs_shrinker_register(sb);
+ /* sb->s_umount is already locked, SB_ACTIVE and SB_BORN are not set */
+ err = erofs_init_managed_cache(sb);
+ if (unlikely(err))
+ return err;
if (!silent)
infoln("mounted on %s with opts: %s.", sb->s_id, (char *)data);
return 0;
- /*
- * please add a label for each exit point and use
- * the following name convention, thus new features
- * can be integrated easily without renaming labels.
- */
-err_iget:
-#ifdef EROFS_FS_HAS_MANAGED_CACHE
- iput(sbi->managed_cache);
-err_init_managed_cache:
-#endif
-err_parseopt:
-err_sbread:
- sb->s_fs_info = NULL;
- kfree(sbi);
-err:
- return err;
+}
+
+static struct dentry *erofs_mount(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, erofs_fill_super);
}
/*
* could be triggered after deactivate_locked_super()
* is called, thus including umount and failed to initialize.
*/
-static void erofs_put_super(struct super_block *sb)
+static void erofs_kill_sb(struct super_block *sb)
{
- struct erofs_sb_info *sbi = EROFS_SB(sb);
+ struct erofs_sb_info *sbi;
+
+ WARN_ON(sb->s_magic != EROFS_SUPER_MAGIC);
+ infoln("unmounting for %s", sb->s_id);
- /* for cases which are failed in "read_super" */
+ kill_block_super(sb);
+
+ sbi = EROFS_SB(sb);
if (!sbi)
return;
+ kfree(sbi);
+ sb->s_fs_info = NULL;
+}
- WARN_ON(sb->s_magic != EROFS_SUPER_MAGIC);
+/* called when ->s_root is non-NULL */
+static void erofs_put_super(struct super_block *sb)
+{
+ struct erofs_sb_info *const sbi = EROFS_SB(sb);
- infoln("unmounted for %s", sb->s_id);
+ DBG_BUGON(!sbi);
erofs_shrinker_unregister(sb);
#ifdef EROFS_FS_HAS_MANAGED_CACHE
iput(sbi->managed_cache);
+ sbi->managed_cache = NULL;
#endif
- kfree(sbi);
- sb->s_fs_info = NULL;
-}
-
-static struct dentry *erofs_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
-{
- return mount_bdev(fs_type, flags, dev_name, data, erofs_fill_super);
}
static struct file_system_type erofs_fs_type = {
.owner = THIS_MODULE,
.name = "erofs",
.mount = erofs_mount,
- .kill_sb = kill_block_super,
+ .kill_sb = erofs_kill_sb,
.fs_flags = FS_REQUIRES_DEV,
};
MODULE_ALIAS_FS("erofs");
--
2.17.1
next prev parent reply other threads:[~2019-07-29 6:52 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 6:51 [PATCH 00/22] staging: erofs: updates according to erofs-outofstaging v4 Gao Xiang
2019-07-29 6:51 ` [PATCH 01/22] staging: erofs: update source file headers Gao Xiang
2019-07-30 7:20 ` Greg Kroah-Hartman
2019-07-30 7:26 ` Gao Xiang
2019-07-31 6:36 ` Chao Yu
2019-07-29 6:51 ` [PATCH 02/22] staging: erofs: rename source files for better understanding Gao Xiang
2019-07-31 6:43 ` Chao Yu
2019-07-29 6:51 ` [PATCH 03/22] staging: erofs: fix dummy functions erofs_{get,list}xattr Gao Xiang
2019-07-31 6:44 ` [PATCH 03/22] staging: erofs: fix dummy functions erofs_{get, list}xattr Chao Yu
2019-07-29 6:51 ` [PATCH 04/22] staging: erofs: keep up erofs_fs.h with erofs-outofstaging patchset Gao Xiang
2019-07-31 6:46 ` Chao Yu
2019-07-29 6:51 ` [PATCH 05/22] staging: erofs: sunset erofs_workstn_{lock,unlock} Gao Xiang
2019-07-31 6:49 ` Chao Yu
2019-07-29 6:51 ` [PATCH 06/22] staging: erofs: clean up internal.h Gao Xiang
2019-07-31 6:53 ` Chao Yu
2019-07-29 6:51 ` [PATCH 07/22] staging: erofs: remove redundant #include "internal.h" Gao Xiang
2019-07-31 7:03 ` Chao Yu
2019-07-31 7:08 ` Gao Xiang
2019-07-31 12:07 ` Chao Yu
2019-07-31 12:54 ` Gao Xiang
2019-08-01 1:31 ` Chao Yu
2019-07-29 6:51 ` [PATCH 08/22] staging: erofs: kill CONFIG_EROFS_FS_IO_MAX_RETRIES Gao Xiang
2019-07-31 7:05 ` Chao Yu
2019-07-31 7:11 ` Gao Xiang
2019-07-31 12:10 ` Chao Yu
2019-07-31 12:55 ` Gao Xiang
2019-07-29 6:51 ` [PATCH 09/22] staging: erofs: clean up shrinker stuffs Gao Xiang
2019-07-31 7:41 ` Chao Yu
2019-07-29 6:51 ` [PATCH 10/22] staging: erofs: kill sbi->dev_name Gao Xiang
2019-07-31 7:46 ` Chao Yu
2019-07-29 6:51 ` Gao Xiang [this message]
2019-07-31 8:15 ` [PATCH 11/22] staging: erofs: kill all failure handling in fill_super() Chao Yu
2019-07-31 12:52 ` Gao Xiang
2019-07-29 6:51 ` [PATCH 12/22] staging: erofs: refine erofs_allocpage() Gao Xiang
2019-07-31 8:20 ` Chao Yu
2019-07-29 6:51 ` [PATCH 13/22] staging: erofs: kill CONFIG_EROFS_FS_USE_VM_MAP_RAM Gao Xiang
2019-07-31 8:27 ` Chao Yu
2019-07-29 6:51 ` [PATCH 14/22] staging: erofs: tidy up zpvec.h Gao Xiang
2019-07-31 8:28 ` Chao Yu
2019-07-29 6:51 ` [PATCH 15/22] staging: erofs: remove redundant braces in inode.c Gao Xiang
2019-07-31 8:29 ` Chao Yu
2019-07-29 6:51 ` [PATCH 16/22] staging: erofs: tidy up decompression frontend Gao Xiang
2019-07-31 9:07 ` Chao Yu
2019-07-29 6:51 ` [PATCH 17/22] staging: erofs: remove clusterbits in sbi Gao Xiang
2019-07-31 9:12 ` Chao Yu
2019-07-29 6:51 ` [PATCH 18/22] staging: erofs: turn cache strategies into mount options Gao Xiang
2019-07-31 9:23 ` Chao Yu
2019-07-29 6:51 ` [PATCH 19/22] staging: erofs: tidy up utils.c Gao Xiang
2019-07-31 9:24 ` Chao Yu
2019-07-29 6:51 ` [PATCH 20/22] staging: erofs: tidy up internal.h Gao Xiang
2019-07-31 9:25 ` Chao Yu
2019-07-29 6:51 ` [PATCH 21/22] staging: erofs: update super.c Gao Xiang
2019-07-31 9:40 ` Chao Yu
2019-07-29 6:51 ` [PATCH 22/22] staging: erofs: update Kconfig Gao Xiang
2019-07-31 9:44 ` Chao Yu
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