From: Andreas Gruenbacher <agruenba@redhat.com>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-api@vger.kernel.org,
linux-cifs@vger.kernel.org,
linux-security-module@vger.kernel.org
Subject: [RFC v7 01/41] vfs: Add IS_ACL() and IS_RICHACL() tests
Date: Sat, 5 Sep 2015 12:26:56 +0200 [thread overview]
Message-ID: <1441448856-13478-2-git-send-email-agruenba@redhat.com> (raw)
In-Reply-To: <1441448856-13478-1-git-send-email-agruenba@redhat.com>
The vfs does not apply the umask for file systems that support acls. The
test used for this used to be called IS_POSIXACL(). Switch to a new
IS_ACL() test to check for either posix acls or richacls instead. Add a new
MS_RICHACL flag and IS_RICHACL() test for richacls alone. The IS_POSIXACL()
test is still needed by nfsd.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: J. Bruce Fields <bfields@redhat.com>
---
fs/Kconfig | 3 +++
fs/namei.c | 8 ++++----
include/linux/fs.h | 12 ++++++++++++
include/uapi/linux/fs.h | 3 ++-
4 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/fs/Kconfig b/fs/Kconfig
index 011f433..3e09c06 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -59,6 +59,9 @@ endif # BLOCK
config FS_POSIX_ACL
def_bool n
+config FS_RICHACL
+ def_bool n
+
config EXPORTFS
tristate
diff --git a/fs/namei.c b/fs/namei.c
index 1c2105e..480d2e8 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2771,7 +2771,7 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
}
mode = op->mode;
- if ((open_flag & O_CREAT) && !IS_POSIXACL(dir))
+ if ((open_flag & O_CREAT) && !IS_ACL(dir))
mode &= ~current_umask();
excl = (open_flag & (O_EXCL | O_CREAT)) == (O_EXCL | O_CREAT);
@@ -2955,7 +2955,7 @@ static int lookup_open(struct nameidata *nd, struct path *path,
/* Negative dentry, just create the file */
if (!dentry->d_inode && (op->open_flag & O_CREAT)) {
umode_t mode = op->mode;
- if (!IS_POSIXACL(dir->d_inode))
+ if (!IS_ACL(dir->d_inode))
mode &= ~current_umask();
/*
* This write is needed to ensure that a
@@ -3526,7 +3526,7 @@ retry:
if (IS_ERR(dentry))
return PTR_ERR(dentry);
- if (!IS_POSIXACL(path.dentry->d_inode))
+ if (!IS_ACL(path.dentry->d_inode))
mode &= ~current_umask();
error = security_path_mknod(&path, dentry, mode, dev);
if (error)
@@ -3595,7 +3595,7 @@ retry:
if (IS_ERR(dentry))
return PTR_ERR(dentry);
- if (!IS_POSIXACL(path.dentry->d_inode))
+ if (!IS_ACL(path.dentry->d_inode))
mode &= ~current_umask();
error = security_path_mkdir(&path, dentry, mode);
if (!error)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 84b783f..f98ebc1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1771,6 +1771,12 @@ struct super_operations {
#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
#define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL)
+#ifdef CONFIG_FS_RICHACL
+#define IS_RICHACL(inode) __IS_FLG(inode, MS_RICHACL)
+#else
+#define IS_RICHACL(inode) 0
+#endif
+
#define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD)
#define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME)
#define IS_SWAPFILE(inode) ((inode)->i_flags & S_SWAPFILE)
@@ -1784,6 +1790,12 @@ struct super_operations {
(inode)->i_rdev == WHITEOUT_DEV)
/*
+ * IS_ACL() tells the VFS to not apply the umask
+ * and use check_acl for acl permission checks when defined.
+ */
+#define IS_ACL(inode) __IS_FLG(inode, MS_POSIXACL | MS_RICHACL)
+
+/*
* Inode state bits. Protected by inode->i_lock
*
* Three bits determine the dirty state of the inode, I_DIRTY_SYNC,
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 9b964a5..6ac6bc9 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -81,7 +81,7 @@ struct inodes_stat_t {
#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
MS_VERBOSE is deprecated. */
#define MS_SILENT 32768
-#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
+#define MS_POSIXACL (1<<16) /* Supports POSIX ACLs */
#define MS_UNBINDABLE (1<<17) /* change to unbindable */
#define MS_PRIVATE (1<<18) /* change to private */
#define MS_SLAVE (1<<19) /* change to slave */
@@ -91,6 +91,7 @@ struct inodes_stat_t {
#define MS_I_VERSION (1<<23) /* Update inode I_version field */
#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
#define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
+#define MS_RICHACL (1<<26) /* Supports richacls */
/* These sb flags are internal to the kernel */
#define MS_NOSEC (1<<28)
--
2.4.3
next prev parent reply other threads:[~2015-09-05 10:28 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-05 10:26 [RFC v7 00/41] Richacls Andreas Gruenbacher
2015-09-05 10:26 ` Andreas Gruenbacher [this message]
2015-09-05 10:26 ` [RFC v7 02/41] vfs: Add MAY_CREATE_FILE and MAY_CREATE_DIR permission flags Andreas Gruenbacher
2015-09-05 10:26 ` [RFC v7 03/41] vfs: Add MAY_DELETE_SELF and MAY_DELETE_CHILD " Andreas Gruenbacher
2015-09-06 8:14 ` [PATCH] " Andreas Gruenbacher
2015-09-11 20:30 ` J. Bruce Fields
2015-09-05 10:26 ` [RFC v7 04/41] vfs: Make the inode passed to inode_change_ok non-const Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 05/41] vfs: Add permission flags for setting file attributes Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 06/41] richacl: In-memory representation and helper functions Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 07/41] richacl: Permission mapping functions Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 08/41] richacl: Compute maximum file masks from an acl Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 09/41] richacl: Update the file masks in chmod() Andreas Gruenbacher
2015-09-11 20:35 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 10/41] richacl: Permission check algorithm Andreas Gruenbacher
2015-09-11 21:16 ` J. Bruce Fields
2015-09-11 22:12 ` Andreas Grünbacher
2015-09-17 17:30 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 11/41] vfs: Cache base_acl objects in inodes Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 12/41] vfs: Cache richacl in struct inode Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 13/41] richacl: Check if an acl is equivalent to a file mode Andreas Gruenbacher
2015-09-17 18:22 ` J. Bruce Fields
2015-09-18 0:56 ` J. Bruce Fields
2015-09-21 13:59 ` Austin S Hemmelgarn
2015-09-21 14:38 ` J. Bruce Fields
2015-09-21 17:00 ` Austin S Hemmelgarn
2015-09-21 17:48 ` J. Bruce Fields
2015-09-21 15:31 ` J. Bruce Fields
2015-09-21 23:26 ` Andreas Gruenbacher
2015-09-21 23:20 ` Andreas Gruenbacher
2015-09-17 18:37 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 14/41] richacl: Create-time inheritance Andreas Gruenbacher
2015-09-18 17:58 ` J. Bruce Fields
2015-09-21 20:37 ` Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 15/41] richacl: Automatic Inheritance Andreas Gruenbacher
2015-09-18 18:40 ` J. Bruce Fields
2015-09-21 21:19 ` Andreas Gruenbacher
2015-09-22 1:51 ` J. Bruce Fields
2015-09-23 13:55 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 16/41] richacl: xattr mapping functions Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 17/41] vfs: Add richacl permission checking Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 18/41] ext4: Add richacl support Andreas Gruenbacher
2015-09-23 2:30 ` Aneesh Kumar K.V
2015-09-05 10:27 ` [RFC v7 19/41] ext4: Add richacl feature flag Andreas Gruenbacher
2015-09-23 2:31 ` Aneesh Kumar K.V
2015-09-05 10:27 ` [RFC v7 20/41] richacl: acl editing helper functions Andreas Gruenbacher
2015-09-18 18:54 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 21/41] richacl: Move everyone@ aces down the acl Andreas Gruenbacher
2015-09-18 19:35 ` J. Bruce Fields
2015-09-21 21:43 ` Andreas Gruenbacher
2015-09-22 1:52 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 22/41] richacl: Propagate everyone@ permissions to other aces Andreas Gruenbacher
2015-09-18 21:36 ` J. Bruce Fields
2015-09-21 23:44 ` Andreas Gruenbacher
2015-09-18 21:56 ` J. Bruce Fields
2015-09-21 19:24 ` J. Bruce Fields
2015-09-23 1:24 ` Andreas Gruenbacher
2015-09-23 1:39 ` Andreas Gruenbacher
2015-09-23 1:46 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 23/41] richacl: Set the owner permissions to the owner mask Andreas Gruenbacher
2015-09-21 21:00 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 24/41] richacl: Set the other permissions to the other mask Andreas Gruenbacher
2015-09-23 14:03 ` J. Bruce Fields
2015-09-23 14:12 ` Andreas Grünbacher
2015-09-05 10:27 ` [RFC v7 25/41] richacl: Isolate the owner and group classes Andreas Gruenbacher
2015-09-22 16:06 ` J. Bruce Fields
2015-09-23 13:11 ` Andreas Gruenbacher
2015-09-23 13:15 ` J. Bruce Fields
2015-09-22 19:02 ` J. Bruce Fields
2015-09-23 13:33 ` Andreas Gruenbacher
2015-09-25 11:25 ` Andreas Gruenbacher
2015-09-25 20:17 ` J. Bruce Fields
2015-09-22 19:02 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 26/41] richacl: Apply the file masks to a richacl Andreas Gruenbacher
2015-09-22 19:11 ` J. Bruce Fields
2015-09-23 19:18 ` J. Bruce Fields
2015-09-23 20:29 ` Andreas Gruenbacher
2015-09-23 20:33 ` J. Bruce Fields
2015-09-23 20:40 ` Andreas Gruenbacher
2015-09-23 21:05 ` J. Bruce Fields
2015-09-23 22:14 ` Andreas Gruenbacher
2015-09-24 15:28 ` J. Bruce Fields
2015-09-24 15:48 ` Andreas Gruenbacher
2015-09-22 20:50 ` J. Bruce Fields
2015-09-24 18:33 ` J. Bruce Fields
2015-09-25 16:21 ` [PATCH] richacl: Possible other write-through fix Andreas Gruenbacher
2015-09-25 16:45 ` Andreas Gruenbacher
2015-09-25 18:36 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 27/41] richacl: Create richacl from mode values Andreas Gruenbacher
2015-09-23 20:11 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 28/41] nfsd: Keep list of acls to dispose of in compoundargs Andreas Gruenbacher
2015-09-23 20:28 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 29/41] nfsd: Use richacls as internal acl representation Andreas Gruenbacher
2015-09-24 19:29 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 30/41] nfsd: Add richacl support Andreas Gruenbacher
2015-09-24 19:38 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 31/41] nfsd: Add support for the v4.1 dacl attribute Andreas Gruenbacher
2015-09-24 19:59 ` J. Bruce Fields
2015-09-25 16:37 ` Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 32/41] nfsd: Add support for the MAY_CREATE_{FILE,DIR} permissions Andreas Gruenbacher
2015-09-24 20:01 ` J. Bruce Fields
2015-09-05 10:27 ` [RFC v7 33/41] richacl: Add support for unmapped identifiers Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 34/41] ext4: Don't allow unmapped identifiers in richacls Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 35/41] sunrpc: Allow to demand-allocate pages to encode into Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 36/41] sunrpc: Add xdr_init_encode_pages Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 37/41] nfs: Fix GETATTR bitmap verification Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 38/41] nfs: Remove unused xdr page offsets in getacl/setacl arguments Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 39/41] nfs: Add richacl support Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 40/41] nfs: Add support for the v4.1 dacl attribute Andreas Gruenbacher
2015-09-05 10:27 ` [RFC v7 41/41] richacl: uapi header split Andreas Gruenbacher
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