From: Andreas Gruenbacher <agruenba@redhat.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
"Theodore Ts'o" <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
"J. Bruce Fields" <bfields@fieldses.org>,
Jeff Layton <jlayton@poochiereds.net>,
Trond Myklebust <trond.myklebust@primarydata.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org,
linux-api@vger.kernel.org
Subject: [PATCH v9 01/43] vfs: Add IS_ACL() and IS_RICHACL() tests
Date: Mon, 5 Oct 2015 21:36:28 +0200 [thread overview]
Message-ID: <1444073830-21854-2-git-send-email-agruenba@redhat.com> (raw)
In-Reply-To: <1444073830-21854-1-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 da3f32f..bff2879 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -56,6 +56,9 @@ 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 726d211..48c2752 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2794,7 +2794,7 @@ 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);
@@ -2978,7 +2978,7 @@ 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
@@ -3549,7 +3549,7 @@ 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)
@@ -3618,7 +3618,7 @@ 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 72d8a84..4efa435 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1781,6 +1781,12 @@ 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)
@@ -1794,6 +1800,12 @@ 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)
--
2.5.0
next prev parent reply other threads:[~2015-10-05 19:37 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-05 19:36 [PATCH v9 00/43] Richacls Andreas Gruenbacher
2015-10-05 19:36 ` Andreas Gruenbacher [this message]
2015-10-05 19:36 ` [PATCH v9 02/43] vfs: Add MAY_CREATE_FILE and MAY_CREATE_DIR permission flags Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 03/43] vfs: Add MAY_DELETE_SELF and MAY_DELETE_CHILD " Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 04/43] vfs: Make the inode passed to inode_change_ok non-const Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 05/43] vfs: Add permission flags for setting file attributes Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 06/43] richacl: In-memory representation and helper functions Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 07/43] richacl: Permission mapping functions Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 08/43] richacl: Compute maximum file masks from an acl Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 09/43] richacl: Permission check algorithm Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 10/43] vfs: Cache base_acl objects in inodes Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 11/43] vfs: Add get_richacl and set_richacl inode operations Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 12/43] vfs: Cache richacl in struct inode Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 13/43] richacl: Update the file masks in chmod() Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 14/43] richacl: Check if an acl is equivalent to a file mode Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 15/43] richacl: Create-time inheritance Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 16/43] richacl: Automatic Inheritance Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 17/43] richacl: xattr mapping functions Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 18/43] richacl: Add richacl xattr handler Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 19/43] vfs: Add richacl permission checking Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 20/43] ext4: Add richacl support Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 21/43] ext4: Add richacl feature flag Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 22/43] richacl: acl editing helper functions Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 23/43] richacl: Move everyone@ aces down the acl Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 24/43] richacl: Propagate everyone@ permissions to other aces Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 25/43] richacl: Set the owner permissions to the owner mask Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 26/43] richacl: Set the other permissions to the other mask Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 27/43] richacl: Isolate the owner and group classes Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 28/43] richacl: Apply the file masks to a richacl Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 29/43] richacl: Create richacl from mode values Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 30/43] nfsd: Keep list of acls to dispose of in compoundargs Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 31/43] nfsd: Use richacls as internal acl representation Andreas Gruenbacher
2015-10-05 19:36 ` [PATCH v9 32/43] nfsd: Add richacl support Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 33/43] nfsd: Add support for the v4.1 dacl attribute Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 34/43] nfsd: Add support for the MAY_CREATE_{FILE,DIR} permissions Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 35/43] richacl: Add support for unmapped identifiers Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 36/43] ext4: Don't allow unmapped identifiers in richacls Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 37/43] sunrpc: Allow to demand-allocate pages to encode into Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 38/43] sunrpc: Add xdr_init_encode_pages Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 39/43] nfs: Fix GETATTR bitmap verification Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 40/43] nfs: Remove unused xdr page offsets in getacl/setacl arguments Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 41/43] nfs: Add richacl support Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 42/43] nfs: Add support for the v4.1 dacl attribute Andreas Gruenbacher
2015-10-05 19:37 ` [PATCH v9 43/43] richacl: uapi header split Andreas Gruenbacher
2015-10-06 9:07 ` [PATCH v9 00/43] Richacls Pavel Machek
2015-10-06 12:40 ` Andreas Gruenbacher
2015-10-07 7:33 ` James Morris
2015-10-07 13:21 ` Austin S Hemmelgarn
2015-10-07 13:46 ` Andreas Gruenbacher
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