[PATCH v4 00/20] Xattr inode operation removal

[PATCH v4 00/20] Xattr inode operation removal

[Andreas Gruenbacher]

This is version 4 of the xattr inode operation removal patch series. The
patches are available in git form at:

  https://git.kernel.org/cgit/linux/kernel/git/agruen/linux.git/log/?h=work.xattr

Previous posting: http://www.spinics.net/lists/ecryptfs/msg00791.html


The purpose of this series is to remove unnecessary differences between the
xattr implementations on different filesystems and to simplify things.  With
the exception of redirectors like fuse, overlayfs, and ecryptfs, all
filesystems perform some de-multiplexing based on the xattr name, so it makes
sense to make that the default; filesystems that don't do any de-multiplexing
can easily use a catch-all xattr handler.

The patch series is structured as follows:

 * The first four patches fix a few things and convert overlayfs to use xattr
   handlers; they have been posted to Miklos and linux-unionfs@vger.kernel.org
   already because they are partially relevant for the 4.8 kernel.

 * The following patches convert the remaining filesystems over to use xattr
   handlers.

 * Next, a new IOP_XATTR inode operations flag is introduced: the flag is set
   when an inode supports xattrs.  On most filesystems, the IOP_XATTR flag is
   automatically initialized correctly when the inode is allocated based on
   whether or not the s_xattr field in the inode's superblock is defined.
   Filesystems that support xattrs on some but not all inodes can clear the
   IOP_XATTR flag appropriately.

 * The IOP_XATTR flag is then used to get rid of the two remaining places where
   xattr inode operations other than the generic ones are used: bad inodes and
   libfs empty directories.

 * After that, we get rid of the remaining direct accesses to xattr inode
   operations.

 * Finally, we stop calling the xattr inode operations and remove them.

Note that these patches only remove the getxattr, setxattr, and removexattr
inode operations. The listxattr inode operation does not do any attribute name
de-multiplexing, and remains unchanged except for checking the new IOP_XATTR
flag as well now.


Thanks,
Andreas


Andreas Gruenbacher (20):
ovl: Fix OVL_XATTR_PREFIX
ovl: Get rid of ovl_xattr_noacl_handlers array
ovl: Switch to generic_removexattr
ovl: Switch to generic_getxattr
xattr: Remove unnecessary NULL attribute name check
jffs2: Remove jffs2_{get,set,remove}xattr macros
hfs: Switch to generic xattr handlers
kernfs: Switch to generic xattr handlers
sockfs: getxattr: Fail with -EOPNOTSUPP for invalid attribute names
sockfs: Get rid of getxattr iop
ecryptfs: Switch to generic xattr handlers
fuse: Switch to generic xattr handlers
vfs: Move xattr_resolve_name to the front of fs/xattr.c
vfs: Add IOP_XATTR inode operations flag
vfs: Use IOP_XATTR flag for bad-inode handling
libfs: Use IOP_XATTR flag for empty directory handling
xattr: Add __vfs_{get,set,remove}xattr helpers
vfs: Check for the IOP_XATTR flag in listxattr
xattr: Stop calling {get,set,remove}xattr inode operations
vfs: Remove {get,set,remove}xattr inode operations

Documentation/filesystems/Locking     |  24 +++-
Documentation/filesystems/vfs.txt     |  45 ++++--
fs/9p/vfs_inode_dotl.c                |   9 --
fs/bad_inode.c                        |  21 +--
fs/btrfs/inode.c                      |  12 --
fs/cachefiles/bind.c                  |   4 +-
fs/cachefiles/namei.c                 |   4 +-
fs/ceph/dir.c                         |   3 -
fs/ceph/inode.c                       |   6 -
fs/cifs/cifsfs.c                      |   9 --
fs/ecryptfs/ecryptfs_kernel.h         |   2 +
fs/ecryptfs/inode.c                   |  67 ++++++---
fs/ecryptfs/main.c                    |   1 +
fs/ecryptfs/mmap.c                    |  13 +-
fs/ext2/file.c                        |   3 -
fs/ext2/namei.c                       |   6 -
fs/ext2/symlink.c                     |   6 -
fs/ext4/file.c                        |   3 -
fs/ext4/namei.c                       |   6 -
fs/ext4/symlink.c                     |   9 --
fs/f2fs/file.c                        |   3 -
fs/f2fs/namei.c                       |  12 --
fs/fuse/dir.c                         |  49 +++++--
fs/fuse/fuse_i.h                      |   2 +
fs/fuse/inode.c                       |   1 +
fs/gfs2/inode.c                       |   9 --
fs/hfs/attr.c                         |  83 +++++++----
fs/hfs/hfs_fs.h                       |   6 +-
fs/hfs/inode.c                        |   5 +-
fs/hfs/super.c                        |   1 +
fs/hfsplus/dir.c                      |   3 -
fs/hfsplus/inode.c                    |   3 -
fs/inode.c                            |   2 +
fs/jffs2/dir.c                        |   3 -
fs/jffs2/file.c                       |   3 -
fs/jffs2/symlink.c                    |   3 -
fs/jffs2/xattr.h                      |   6 -
fs/jfs/file.c                         |   3 -
fs/jfs/namei.c                        |   3 -
fs/jfs/symlink.c                      |   6 -
fs/kernfs/dir.c                       |   3 -
fs/kernfs/inode.c                     | 155 +++++++++++----------
fs/kernfs/kernfs-internal.h           |   7 +-
fs/kernfs/mount.c                     |   1 +
fs/kernfs/symlink.c                   |   3 -
fs/libfs.c                            |  29 +---
fs/nfs/nfs3proc.c                     |   6 -
fs/nfs/nfs4proc.c                     |   6 -
fs/ocfs2/file.c                       |   3 -
fs/ocfs2/namei.c                      |   3 -
fs/ocfs2/symlink.c                    |   3 -
fs/orangefs/inode.c                   |   3 -
fs/orangefs/namei.c                   |   3 -
fs/orangefs/symlink.c                 |   1 -
fs/orangefs/xattr.c                   |   3 +
fs/overlayfs/copy_up.c                |   4 +-
fs/overlayfs/dir.c                    |   3 -
fs/overlayfs/inode.c                  |  88 +++---------
fs/overlayfs/overlayfs.h              |  12 +-
fs/overlayfs/super.c                  |  69 ++++++----
fs/reiserfs/file.c                    |   3 -
fs/reiserfs/namei.c                   |   9 --
fs/squashfs/inode.c                   |   1 -
fs/squashfs/namei.c                   |   1 -
fs/squashfs/symlink.c                 |   1 -
fs/squashfs/xattr.c                   |  19 ++-
fs/squashfs/xattr.h                   |   1 -
fs/ubifs/dir.c                        |   3 -
fs/ubifs/file.c                       |   6 -
fs/xattr.c                            | 250 ++++++++++++++++------------------
fs/xfs/xfs_iops.c                     |  15 --
include/linux/fs.h                    |  23 ++--
include/linux/xattr.h                 |   7 +-
mm/shmem.c                            |  15 --
net/socket.c                          |  70 +++++-----
security/commoncap.c                  |  25 ++--
security/integrity/evm/evm_crypto.c   |   7 +-
security/integrity/evm/evm_main.c     |   4 +-
security/integrity/ima/ima_appraise.c |  21 ++-
security/selinux/hooks.c              |  19 +--
security/smack/smack_lsm.c            |  12 +-
81 files changed, 602 insertions(+), 774 deletions(-)

-- 
2.7.4

[PATCH v4 01/20] ovl: Fix OVL_XATTR_PREFIX

[Andreas Gruenbacher]

Make sure ovl_own_xattr_handler only matches attribute names starting
with "overlay.", not "overlayXXX".

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/overlayfs/inode.c     | 5 ++---
 fs/overlayfs/overlayfs.h | 4 ++--
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 1b885c1..859e42c 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -193,9 +193,8 @@ static int ovl_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
 
 static bool ovl_is_private_xattr(const char *name)
 {
-#define OVL_XATTR_PRE_NAME OVL_XATTR_PREFIX "."
-	return strncmp(name, OVL_XATTR_PRE_NAME,
-		       sizeof(OVL_XATTR_PRE_NAME) - 1) == 0;
+	return strncmp(name, OVL_XATTR_PREFIX,
+		       sizeof(OVL_XATTR_PREFIX) - 1) == 0;
 }
 
 int ovl_setxattr(struct dentry *dentry, struct inode *inode,
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index e4f5c95..77fd667 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -24,8 +24,8 @@ enum ovl_path_type {
 	(OVL_TYPE_MERGE(type) || !OVL_TYPE_UPPER(type))
 
 
-#define OVL_XATTR_PREFIX XATTR_TRUSTED_PREFIX "overlay"
-#define OVL_XATTR_OPAQUE OVL_XATTR_PREFIX ".opaque"
+#define OVL_XATTR_PREFIX XATTR_TRUSTED_PREFIX "overlay."
+#define OVL_XATTR_OPAQUE OVL_XATTR_PREFIX "opaque"
 
 #define OVL_ISUPPER_MASK 1UL
 
-- 
2.7.4

[PATCH v4 02/20] ovl: Get rid of ovl_xattr_noacl_handlers array

[Andreas Gruenbacher]

Use an ordinary #ifdef to conditionally include the POSIX ACL handlers
in ovl_xattr_handlers, like the other filesystems do.  Flag the code
that is now only used conditionally with __maybe_unused.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/overlayfs/super.c | 28 ++++++++++++----------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 4036132..e2b555d 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -967,10 +967,11 @@ static unsigned int ovl_split_lowerdirs(char *str)
 	return ctr;
 }
 
-static int ovl_posix_acl_xattr_set(const struct xattr_handler *handler,
-				   struct dentry *dentry, struct inode *inode,
-				   const char *name, const void *value,
-				   size_t size, int flags)
+static int __maybe_unused
+ovl_posix_acl_xattr_set(const struct xattr_handler *handler,
+			struct dentry *dentry, struct inode *inode,
+			const char *name, const void *value,
+			size_t size, int flags)
 {
 	struct dentry *workdir = ovl_workdir(dentry);
 	struct inode *realinode = ovl_inode_real(inode, NULL);
@@ -1021,13 +1022,15 @@ static int ovl_own_xattr_set(const struct xattr_handler *handler,
 	return -EPERM;
 }
 
-static const struct xattr_handler ovl_posix_acl_access_xattr_handler = {
+static const struct xattr_handler __maybe_unused
+ovl_posix_acl_access_xattr_handler = {
 	.name = XATTR_NAME_POSIX_ACL_ACCESS,
 	.flags = ACL_TYPE_ACCESS,
 	.set = ovl_posix_acl_xattr_set,
 };
 
-static const struct xattr_handler ovl_posix_acl_default_xattr_handler = {
+static const struct xattr_handler __maybe_unused
+ovl_posix_acl_default_xattr_handler = {
 	.name = XATTR_NAME_POSIX_ACL_DEFAULT,
 	.flags = ACL_TYPE_DEFAULT,
 	.set = ovl_posix_acl_xattr_set,
@@ -1044,19 +1047,15 @@ static const struct xattr_handler ovl_other_xattr_handler = {
 };
 
 static const struct xattr_handler *ovl_xattr_handlers[] = {
+#ifdef CONFIG_FS_POSIX_ACL
 	&ovl_posix_acl_access_xattr_handler,
 	&ovl_posix_acl_default_xattr_handler,
+#endif
 	&ovl_own_xattr_handler,
 	&ovl_other_xattr_handler,
 	NULL
 };
 
-static const struct xattr_handler *ovl_xattr_noacl_handlers[] = {
-	&ovl_own_xattr_handler,
-	&ovl_other_xattr_handler,
-	NULL,
-};
-
 static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct path upperpath = { NULL, NULL };
@@ -1269,10 +1268,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 
 	sb->s_magic = OVERLAYFS_SUPER_MAGIC;
 	sb->s_op = &ovl_super_operations;
-	if (IS_ENABLED(CONFIG_FS_POSIX_ACL))
-		sb->s_xattr = ovl_xattr_handlers;
-	else
-		sb->s_xattr = ovl_xattr_noacl_handlers;
+	sb->s_xattr = ovl_xattr_handlers;
 	sb->s_root = root_dentry;
 	sb->s_fs_info = ufs;
 	sb->s_flags |= MS_POSIXACL;
-- 
2.7.4

[PATCH v4 03/20] ovl: Switch to generic_removexattr

[Andreas Gruenbacher]

Commit d837a49b switches from iop->setxattr from ovl_setxattr to
generic_setxattr, so switch from ovl_removexattr to generic_removexattr
as well.  As far as permission checking goes, the same rules should
apply in either case.

While doing that, rename ovl_setxattr to ovl_xattr_set to indicate that
this is not an iop->setxattr implementation and remove the unused inode
argument.

Move ovl_other_xattr_set above ovl_own_xattr_set so that they match the
order of handlers in ovl_xattr_handlers.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/overlayfs/dir.c       |  2 +-
 fs/overlayfs/inode.c     | 65 ++++++++++++++++--------------------------------
 fs/overlayfs/overlayfs.h |  6 ++---
 fs/overlayfs/super.c     | 18 +++++++-------
 4 files changed, 33 insertions(+), 58 deletions(-)

diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 12bcd07..7823480 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -952,7 +952,7 @@ const struct inode_operations ovl_dir_inode_operations = {
 	.setxattr	= generic_setxattr,
 	.getxattr	= ovl_getxattr,
 	.listxattr	= ovl_listxattr,
-	.removexattr	= ovl_removexattr,
+	.removexattr	= generic_removexattr,
 	.get_acl	= ovl_get_acl,
 	.update_time	= ovl_update_time,
 };
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 859e42c..4f348ca 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -197,25 +197,38 @@ static bool ovl_is_private_xattr(const char *name)
 		       sizeof(OVL_XATTR_PREFIX) - 1) == 0;
 }
 
-int ovl_setxattr(struct dentry *dentry, struct inode *inode,
-		 const char *name, const void *value,
-		 size_t size, int flags)
+int ovl_xattr_set(struct dentry *dentry, const char *name, const void *value,
+		  size_t size, int flags)
 {
 	int err;
-	struct dentry *upperdentry;
+	struct path realpath;
+	enum ovl_path_type type = ovl_path_real(dentry, &realpath);
 	const struct cred *old_cred;
 
 	err = ovl_want_write(dentry);
 	if (err)
 		goto out;
 
+	if (!value && !OVL_TYPE_UPPER(type)) {
+		err = vfs_getxattr(realpath.dentry, name, NULL, 0);
+		if (err < 0)
+			goto out_drop_write;
+	}
+
 	err = ovl_copy_up(dentry);
 	if (err)
 		goto out_drop_write;
 
-	upperdentry = ovl_dentry_upper(dentry);
+	if (!OVL_TYPE_UPPER(type))
+		ovl_path_upper(dentry, &realpath);
+
 	old_cred = ovl_override_creds(dentry->d_sb);
-	err = vfs_setxattr(upperdentry, name, value, size, flags);
+	if (value)
+		err = vfs_setxattr(realpath.dentry, name, value, size, flags);
+	else {
+		BUG_ON(flags != XATTR_REPLACE);
+		err = vfs_removexattr(realpath.dentry, name);
+	}
 	revert_creds(old_cred);
 
 out_drop_write:
@@ -271,42 +284,6 @@ ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
 	return res;
 }
 
-int ovl_removexattr(struct dentry *dentry, const char *name)
-{
-	int err;
-	struct path realpath;
-	enum ovl_path_type type = ovl_path_real(dentry, &realpath);
-	const struct cred *old_cred;
-
-	err = ovl_want_write(dentry);
-	if (err)
-		goto out;
-
-	err = -ENODATA;
-	if (ovl_is_private_xattr(name))
-		goto out_drop_write;
-
-	if (!OVL_TYPE_UPPER(type)) {
-		err = vfs_getxattr(realpath.dentry, name, NULL, 0);
-		if (err < 0)
-			goto out_drop_write;
-
-		err = ovl_copy_up(dentry);
-		if (err)
-			goto out_drop_write;
-
-		ovl_path_upper(dentry, &realpath);
-	}
-
-	old_cred = ovl_override_creds(dentry->d_sb);
-	err = vfs_removexattr(realpath.dentry, name);
-	revert_creds(old_cred);
-out_drop_write:
-	ovl_drop_write(dentry);
-out:
-	return err;
-}
-
 struct posix_acl *ovl_get_acl(struct inode *inode, int type)
 {
 	struct inode *realinode = ovl_inode_real(inode, NULL);
@@ -392,7 +369,7 @@ static const struct inode_operations ovl_file_inode_operations = {
 	.setxattr	= generic_setxattr,
 	.getxattr	= ovl_getxattr,
 	.listxattr	= ovl_listxattr,
-	.removexattr	= ovl_removexattr,
+	.removexattr	= generic_removexattr,
 	.get_acl	= ovl_get_acl,
 	.update_time	= ovl_update_time,
 };
@@ -405,7 +382,7 @@ static const struct inode_operations ovl_symlink_inode_operations = {
 	.setxattr	= generic_setxattr,
 	.getxattr	= ovl_getxattr,
 	.listxattr	= ovl_listxattr,
-	.removexattr	= ovl_removexattr,
+	.removexattr	= generic_removexattr,
 	.update_time	= ovl_update_time,
 };
 
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 77fd667..951c8f5 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -183,13 +183,11 @@ int ovl_check_d_type_supported(struct path *realpath);
 /* inode.c */
 int ovl_setattr(struct dentry *dentry, struct iattr *attr);
 int ovl_permission(struct inode *inode, int mask);
-int ovl_setxattr(struct dentry *dentry, struct inode *inode,
-		 const char *name, const void *value,
-		 size_t size, int flags);
+int ovl_xattr_set(struct dentry *dentry, const char *name, const void *value,
+		  size_t size, int flags);
 ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
 		     const char *name, void *value, size_t size);
 ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
-int ovl_removexattr(struct dentry *dentry, const char *name);
 struct posix_acl *ovl_get_acl(struct inode *inode, int type);
 int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags);
 int ovl_update_time(struct inode *inode, struct timespec *ts, int flags);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index e2b555d..9eb3f82 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -999,21 +999,13 @@ ovl_posix_acl_xattr_set(const struct xattr_handler *handler,
 
 	posix_acl_release(acl);
 
-	return ovl_setxattr(dentry, inode, handler->name, value, size, flags);
+	return ovl_xattr_set(dentry, handler->name, value, size, flags);
 
 out_acl_release:
 	posix_acl_release(acl);
 	return err;
 }
 
-static int ovl_other_xattr_set(const struct xattr_handler *handler,
-			       struct dentry *dentry, struct inode *inode,
-			       const char *name, const void *value,
-			       size_t size, int flags)
-{
-	return ovl_setxattr(dentry, inode, name, value, size, flags);
-}
-
 static int ovl_own_xattr_set(const struct xattr_handler *handler,
 			     struct dentry *dentry, struct inode *inode,
 			     const char *name, const void *value,
@@ -1022,6 +1014,14 @@ static int ovl_own_xattr_set(const struct xattr_handler *handler,
 	return -EPERM;
 }
 
+static int ovl_other_xattr_set(const struct xattr_handler *handler,
+			       struct dentry *dentry, struct inode *inode,
+			       const char *name, const void *value,
+			       size_t size, int flags)
+{
+	return ovl_xattr_set(dentry, name, value, size, flags);
+}
+
 static const struct xattr_handler __maybe_unused
 ovl_posix_acl_access_xattr_handler = {
 	.name = XATTR_NAME_POSIX_ACL_ACCESS,
-- 
2.7.4

[PATCH v4 04/20] ovl: Switch to generic_getxattr

[Andreas Gruenbacher]

Now that overlayfs has xattr handlers for iop->{set,remove}xattr, use
those same handlers for iop->getxattr as well.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/overlayfs/dir.c       |  2 +-
 fs/overlayfs/inode.c     | 20 ++------------------
 fs/overlayfs/overlayfs.h |  2 --
 fs/overlayfs/super.c     | 25 +++++++++++++++++++++++++
 4 files changed, 28 insertions(+), 21 deletions(-)

diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 7823480..a5ade8a 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -950,7 +950,7 @@ const struct inode_operations ovl_dir_inode_operations = {
 	.permission	= ovl_permission,
 	.getattr	= ovl_dir_getattr,
 	.setxattr	= generic_setxattr,
-	.getxattr	= ovl_getxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= ovl_listxattr,
 	.removexattr	= generic_removexattr,
 	.get_acl	= ovl_get_acl,
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 4f348ca..a699ff9 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -237,22 +237,6 @@ out:
 	return err;
 }
 
-ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
-		     const char *name, void *value, size_t size)
-{
-	struct dentry *realdentry = ovl_dentry_real(dentry);
-	ssize_t res;
-	const struct cred *old_cred;
-
-	if (ovl_is_private_xattr(name))
-		return -ENODATA;
-
-	old_cred = ovl_override_creds(dentry->d_sb);
-	res = vfs_getxattr(realdentry, name, value, size);
-	revert_creds(old_cred);
-	return res;
-}
-
 ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
 {
 	struct dentry *realdentry = ovl_dentry_real(dentry);
@@ -367,7 +351,7 @@ static const struct inode_operations ovl_file_inode_operations = {
 	.permission	= ovl_permission,
 	.getattr	= ovl_getattr,
 	.setxattr	= generic_setxattr,
-	.getxattr	= ovl_getxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= ovl_listxattr,
 	.removexattr	= generic_removexattr,
 	.get_acl	= ovl_get_acl,
@@ -380,7 +364,7 @@ static const struct inode_operations ovl_symlink_inode_operations = {
 	.readlink	= ovl_readlink,
 	.getattr	= ovl_getattr,
 	.setxattr	= generic_setxattr,
-	.getxattr	= ovl_getxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= ovl_listxattr,
 	.removexattr	= generic_removexattr,
 	.update_time	= ovl_update_time,
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 951c8f5..5df6fd1 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -185,8 +185,6 @@ int ovl_setattr(struct dentry *dentry, struct iattr *attr);
 int ovl_permission(struct inode *inode, int mask);
 int ovl_xattr_set(struct dentry *dentry, const char *name, const void *value,
 		  size_t size, int flags);
-ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
-		     const char *name, void *value, size_t size);
 ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
 struct posix_acl *ovl_get_acl(struct inode *inode, int type);
 int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 9eb3f82..762f3ad 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -967,6 +967,20 @@ static unsigned int ovl_split_lowerdirs(char *str)
 	return ctr;
 }
 
+static int ovl_xattr_get(const struct xattr_handler *handler,
+			 struct dentry *dentry, struct inode *inode,
+			 const char *name, void *buffer, size_t size)
+{
+	struct dentry *realdentry = ovl_dentry_real(dentry);
+	const struct cred *old_cred;
+	ssize_t err;
+
+	old_cred = ovl_override_creds(dentry->d_sb);
+	err = vfs_getxattr(realdentry, name, buffer, size);
+	revert_creds(old_cred);
+	return err;
+}
+
 static int __maybe_unused
 ovl_posix_acl_xattr_set(const struct xattr_handler *handler,
 			struct dentry *dentry, struct inode *inode,
@@ -1006,6 +1020,13 @@ out_acl_release:
 	return err;
 }
 
+static int ovl_own_xattr_get(const struct xattr_handler *handler,
+			     struct dentry *dentry, struct inode *inode,
+			     const char *name, void *buffer, size_t size)
+{
+	return -EPERM;
+}
+
 static int ovl_own_xattr_set(const struct xattr_handler *handler,
 			     struct dentry *dentry, struct inode *inode,
 			     const char *name, const void *value,
@@ -1026,6 +1047,7 @@ static const struct xattr_handler __maybe_unused
 ovl_posix_acl_access_xattr_handler = {
 	.name = XATTR_NAME_POSIX_ACL_ACCESS,
 	.flags = ACL_TYPE_ACCESS,
+	.get = ovl_xattr_get,
 	.set = ovl_posix_acl_xattr_set,
 };
 
@@ -1033,16 +1055,19 @@ static const struct xattr_handler __maybe_unused
 ovl_posix_acl_default_xattr_handler = {
 	.name = XATTR_NAME_POSIX_ACL_DEFAULT,
 	.flags = ACL_TYPE_DEFAULT,
+	.get = ovl_xattr_get,
 	.set = ovl_posix_acl_xattr_set,
 };
 
 static const struct xattr_handler ovl_own_xattr_handler = {
 	.prefix	= OVL_XATTR_PREFIX,
+	.get = ovl_own_xattr_get,
 	.set = ovl_own_xattr_set,
 };
 
 static const struct xattr_handler ovl_other_xattr_handler = {
 	.prefix	= "", /* catch all */
+	.get = ovl_xattr_get,
 	.set = ovl_other_xattr_set,
 };
 
-- 
2.7.4

[PATCH v4 05/20] xattr: Remove unnecessary NULL attribute name check

[Andreas Gruenbacher]

When NULL is passed to one of the xattr system calls as the attribute
name, copying that name from user space already fails with -EFAULT;
xattr_resolve_name is never called with a NULL attribute name.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/xattr.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/xattr.c b/fs/xattr.c
index c243905..1f72c92 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -675,9 +675,6 @@ xattr_resolve_name(const struct xattr_handler **handlers, const char **name)
 {
 	const struct xattr_handler *handler;
 
-	if (!*name)
-		return ERR_PTR(-EINVAL);
-
 	for_each_xattr_handler(handlers, handler) {
 		const char *n;
 
-- 
2.7.4

[PATCH v4 06/20] jffs2: Remove jffs2_{get,set,remove}xattr macros

[Andreas Gruenbacher]

When CONFIG_JFFS2_FS_XATTR is off, jffs2_xattr_handlers is defined as
NULL. With sb->s_xattr == NULL, the generic_{get,set,remove}xattr
functions produce the same result as setting the {get,set,remove}xattr
inode operations to NULL, so there is no need for these macros.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/jffs2/dir.c     | 6 +++---
 fs/jffs2/file.c    | 6 +++---
 fs/jffs2/symlink.c | 6 +++---
 fs/jffs2/xattr.h   | 6 ------
 4 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 30eb33ff..8aa2f89 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -61,10 +61,10 @@ const struct inode_operations jffs2_dir_inode_operations =
 	.get_acl =	jffs2_get_acl,
 	.set_acl =	jffs2_set_acl,
 	.setattr =	jffs2_setattr,
-	.setxattr =	jffs2_setxattr,
-	.getxattr =	jffs2_getxattr,
+	.setxattr =	generic_setxattr,
+	.getxattr =	generic_getxattr,
 	.listxattr =	jffs2_listxattr,
-	.removexattr =	jffs2_removexattr
+	.removexattr =	generic_removexattr
 };
 
 /***********************************************************************/
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 0e62dec..fdf9e1c 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -66,10 +66,10 @@ const struct inode_operations jffs2_file_inode_operations =
 	.get_acl =	jffs2_get_acl,
 	.set_acl =	jffs2_set_acl,
 	.setattr =	jffs2_setattr,
-	.setxattr =	jffs2_setxattr,
-	.getxattr =	jffs2_getxattr,
+	.setxattr =	generic_setxattr,
+	.getxattr =	generic_getxattr,
 	.listxattr =	jffs2_listxattr,
-	.removexattr =	jffs2_removexattr
+	.removexattr =	generic_removexattr
 };
 
 const struct address_space_operations jffs2_file_address_operations =
diff --git a/fs/jffs2/symlink.c b/fs/jffs2/symlink.c
index 2cabd64..afe2d75 100644
--- a/fs/jffs2/symlink.c
+++ b/fs/jffs2/symlink.c
@@ -16,8 +16,8 @@ const struct inode_operations jffs2_symlink_inode_operations =
 	.readlink =	generic_readlink,
 	.get_link =	simple_get_link,
 	.setattr =	jffs2_setattr,
-	.setxattr =	jffs2_setxattr,
-	.getxattr =	jffs2_getxattr,
+	.setxattr =	generic_setxattr,
+	.getxattr =	generic_getxattr,
 	.listxattr =	jffs2_listxattr,
-	.removexattr =	jffs2_removexattr
+	.removexattr =	generic_removexattr
 };
diff --git a/fs/jffs2/xattr.h b/fs/jffs2/xattr.h
index 467ff37..720007b 100644
--- a/fs/jffs2/xattr.h
+++ b/fs/jffs2/xattr.h
@@ -99,9 +99,6 @@ extern const struct xattr_handler jffs2_user_xattr_handler;
 extern const struct xattr_handler jffs2_trusted_xattr_handler;
 
 extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
-#define jffs2_getxattr		generic_getxattr
-#define jffs2_setxattr		generic_setxattr
-#define jffs2_removexattr	generic_removexattr
 
 #else
 
@@ -116,9 +113,6 @@ extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t);
 
 #define jffs2_xattr_handlers	NULL
 #define jffs2_listxattr		NULL
-#define jffs2_getxattr		NULL
-#define jffs2_setxattr		NULL
-#define jffs2_removexattr	NULL
 
 #endif /* CONFIG_JFFS2_FS_XATTR */
 
-- 
2.7.4

[PATCH v4 07/20] hfs: Switch to generic xattr handlers

[Andreas Gruenbacher]

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/hfs/attr.c   | 83 +++++++++++++++++++++++++++++++++++++++------------------
 fs/hfs/hfs_fs.h |  6 +----
 fs/hfs/inode.c  |  7 ++---
 fs/hfs/super.c  |  1 +
 4 files changed, 63 insertions(+), 34 deletions(-)

diff --git a/fs/hfs/attr.c b/fs/hfs/attr.c
index d9a8691..0933600 100644
--- a/fs/hfs/attr.c
+++ b/fs/hfs/attr.c
@@ -13,9 +13,13 @@
 #include "hfs_fs.h"
 #include "btree.h"
 
-int hfs_setxattr(struct dentry *unused, struct inode *inode,
-		 const char *name, const void *value,
-		 size_t size, int flags)
+enum hfs_xattr_type {
+	HFS_TYPE,
+	HFS_CREATOR,
+};
+
+static int __hfs_setxattr(struct inode *inode, enum hfs_xattr_type type,
+			  const void *value, size_t size, int flags)
 {
 	struct hfs_find_data fd;
 	hfs_cat_rec rec;
@@ -36,18 +40,22 @@ int hfs_setxattr(struct dentry *unused, struct inode *inode,
 			sizeof(struct hfs_cat_file));
 	file = &rec.file;
 
-	if (!strcmp(name, "hfs.type")) {
+	switch (type) {
+	case HFS_TYPE:
 		if (size == 4)
 			memcpy(&file->UsrWds.fdType, value, 4);
 		else
 			res = -ERANGE;
-	} else if (!strcmp(name, "hfs.creator")) {
+		break;
+
+	case HFS_CREATOR:
 		if (size == 4)
 			memcpy(&file->UsrWds.fdCreator, value, 4);
 		else
 			res = -ERANGE;
-	} else
-		res = -EOPNOTSUPP;
+		break;
+	}
+
 	if (!res)
 		hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
 				sizeof(struct hfs_cat_file));
@@ -56,8 +64,8 @@ out:
 	return res;
 }
 
-ssize_t hfs_getxattr(struct dentry *unused, struct inode *inode,
-		     const char *name, void *value, size_t size)
+static ssize_t __hfs_getxattr(struct inode *inode, enum hfs_xattr_type type,
+			      void *value, size_t size)
 {
 	struct hfs_find_data fd;
 	hfs_cat_rec rec;
@@ -80,41 +88,64 @@ ssize_t hfs_getxattr(struct dentry *unused, struct inode *inode,
 	}
 	file = &rec.file;
 
-	if (!strcmp(name, "hfs.type")) {
+	switch (type) {
+	case HFS_TYPE:
 		if (size >= 4) {
 			memcpy(value, &file->UsrWds.fdType, 4);
 			res = 4;
 		} else
 			res = size ? -ERANGE : 4;
-	} else if (!strcmp(name, "hfs.creator")) {
+		break;
+
+	case HFS_CREATOR:
 		if (size >= 4) {
 			memcpy(value, &file->UsrWds.fdCreator, 4);
 			res = 4;
 		} else
 			res = size ? -ERANGE : 4;
-	} else
-		res = -ENODATA;
+		break;
+	}
+
 out:
 	if (size)
 		hfs_find_exit(&fd);
 	return res;
 }
 
-#define HFS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type"))
-
-ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
+static int hfs_xattr_get(const struct xattr_handler *handler,
+			 struct dentry *unused, struct inode *inode,
+			 const char *name, void *value, size_t size)
 {
-	struct inode *inode = d_inode(dentry);
+	return __hfs_getxattr(inode, handler->flags, value, size);
+}
 
-	if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
+static int hfs_xattr_set(const struct xattr_handler *handler,
+			 struct dentry *unused, struct inode *inode,
+			 const char *name, const void *value, size_t size,
+			 int flags)
+{
+	if (!value)
 		return -EOPNOTSUPP;
 
-	if (!buffer || !size)
-		return HFS_ATTRLIST_SIZE;
-	if (size < HFS_ATTRLIST_SIZE)
-		return -ERANGE;
-	strcpy(buffer, "hfs.type");
-	strcpy(buffer + sizeof("hfs.type"), "hfs.creator");
-
-	return HFS_ATTRLIST_SIZE;
+	return __hfs_setxattr(inode, handler->flags, value, size, flags);
 }
+
+static const struct xattr_handler hfs_creator_handler = {
+	.name = "hfs.creator",
+	.flags = HFS_CREATOR,
+	.get = hfs_xattr_get,
+	.set = hfs_xattr_set,
+};
+
+static const struct xattr_handler hfs_type_handler = {
+	.name = "hfs.type",
+	.flags = HFS_TYPE,
+	.get = hfs_xattr_get,
+	.set = hfs_xattr_set,
+};
+
+const struct xattr_handler *hfs_xattr_handlers[] = {
+	&hfs_creator_handler,
+	&hfs_type_handler,
+	NULL
+};
diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h
index 16f5172..4cdec5a 100644
--- a/fs/hfs/hfs_fs.h
+++ b/fs/hfs/hfs_fs.h
@@ -212,11 +212,7 @@ extern void hfs_evict_inode(struct inode *);
 extern void hfs_delete_inode(struct inode *);
 
 /* attr.c */
-extern int hfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
-			const void *value, size_t size, int flags);
-extern ssize_t hfs_getxattr(struct dentry *dentry, struct inode *inode,
-			    const char *name, void *value, size_t size);
-extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
+extern const struct xattr_handler *hfs_xattr_handlers[];
 
 /* mdb.c */
 extern int hfs_mdb_get(struct super_block *);
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index c6a3241..7f44f1a 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -15,6 +15,7 @@
 #include <linux/mpage.h>
 #include <linux/sched.h>
 #include <linux/uio.h>
+#include <linux/xattr.h>
 
 #include "hfs_fs.h"
 #include "btree.h"
@@ -687,7 +688,7 @@ static const struct file_operations hfs_file_operations = {
 static const struct inode_operations hfs_file_inode_operations = {
 	.lookup		= hfs_file_lookup,
 	.setattr	= hfs_inode_setattr,
-	.setxattr	= hfs_setxattr,
-	.getxattr	= hfs_getxattr,
-	.listxattr	= hfs_listxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
+	.listxattr	= generic_listxattr,
 };
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index 1ca95c2..bf6304a 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -406,6 +406,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
 	}
 
 	sb->s_op = &hfs_super_operations;
+	sb->s_xattr = hfs_xattr_handlers;
 	sb->s_flags |= MS_NODIRATIME;
 	mutex_init(&sbi->bitmap_lock);
 
-- 
2.7.4

[PATCH v4 08/20] kernfs: Switch to generic xattr handlers

[Andreas Gruenbacher]

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Tejun Heo <tj@kernel.org>
---
 fs/kernfs/dir.c             |   6 +-
 fs/kernfs/inode.c           | 158 +++++++++++++++++++++++---------------------
 fs/kernfs/kernfs-internal.h |   7 +-
 fs/kernfs/mount.c           |   1 +
 fs/kernfs/symlink.c         |   6 +-
 5 files changed, 92 insertions(+), 86 deletions(-)

diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index e57174d..a6e430a 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -1126,9 +1126,9 @@ const struct inode_operations kernfs_dir_iops = {
 	.permission	= kernfs_iop_permission,
 	.setattr	= kernfs_iop_setattr,
 	.getattr	= kernfs_iop_getattr,
-	.setxattr	= kernfs_iop_setxattr,
-	.removexattr	= kernfs_iop_removexattr,
-	.getxattr	= kernfs_iop_getxattr,
+	.setxattr	= generic_setxattr,
+	.removexattr	= generic_removexattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= kernfs_iop_listxattr,
 
 	.mkdir		= kernfs_iop_mkdir,
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 63b925d..6bc8754 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -28,9 +28,9 @@ static const struct inode_operations kernfs_iops = {
 	.permission	= kernfs_iop_permission,
 	.setattr	= kernfs_iop_setattr,
 	.getattr	= kernfs_iop_getattr,
-	.setxattr	= kernfs_iop_setxattr,
-	.removexattr	= kernfs_iop_removexattr,
-	.getxattr	= kernfs_iop_getxattr,
+	.setxattr	= generic_setxattr,
+	.removexattr	= generic_removexattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= kernfs_iop_listxattr,
 };
 
@@ -138,17 +138,12 @@ out:
 	return error;
 }
 
-static int kernfs_node_setsecdata(struct kernfs_node *kn, void **secdata,
+static int kernfs_node_setsecdata(struct kernfs_iattrs *attrs, void **secdata,
 				  u32 *secdata_len)
 {
-	struct kernfs_iattrs *attrs;
 	void *old_secdata;
 	size_t old_secdata_len;
 
-	attrs = kernfs_iattrs(kn);
-	if (!attrs)
-		return -ENOMEM;
-
 	old_secdata = attrs->ia_secdata;
 	old_secdata_len = attrs->ia_secdata_len;
 
@@ -160,71 +155,6 @@ static int kernfs_node_setsecdata(struct kernfs_node *kn, void **secdata,
 	return 0;
 }
 
-int kernfs_iop_setxattr(struct dentry *unused, struct inode *inode,
-			const char *name, const void *value,
-			size_t size, int flags)
-{
-	struct kernfs_node *kn = inode->i_private;
-	struct kernfs_iattrs *attrs;
-	void *secdata;
-	int error;
-	u32 secdata_len = 0;
-
-	attrs = kernfs_iattrs(kn);
-	if (!attrs)
-		return -ENOMEM;
-
-	if (!strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN)) {
-		const char *suffix = name + XATTR_SECURITY_PREFIX_LEN;
-		error = security_inode_setsecurity(inode, suffix,
-						value, size, flags);
-		if (error)
-			return error;
-		error = security_inode_getsecctx(inode,
-						&secdata, &secdata_len);
-		if (error)
-			return error;
-
-		mutex_lock(&kernfs_mutex);
-		error = kernfs_node_setsecdata(kn, &secdata, &secdata_len);
-		mutex_unlock(&kernfs_mutex);
-
-		if (secdata)
-			security_release_secctx(secdata, secdata_len);
-		return error;
-	} else if (!strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN)) {
-		return simple_xattr_set(&attrs->xattrs, name, value, size,
-					flags);
-	}
-
-	return -EINVAL;
-}
-
-int kernfs_iop_removexattr(struct dentry *dentry, const char *name)
-{
-	struct kernfs_node *kn = dentry->d_fsdata;
-	struct kernfs_iattrs *attrs;
-
-	attrs = kernfs_iattrs(kn);
-	if (!attrs)
-		return -ENOMEM;
-
-	return simple_xattr_set(&attrs->xattrs, name, NULL, 0, XATTR_REPLACE);
-}
-
-ssize_t kernfs_iop_getxattr(struct dentry *unused, struct inode *inode,
-			    const char *name, void *buf, size_t size)
-{
-	struct kernfs_node *kn = inode->i_private;
-	struct kernfs_iattrs *attrs;
-
-	attrs = kernfs_iattrs(kn);
-	if (!attrs)
-		return -ENOMEM;
-
-	return simple_xattr_get(&attrs->xattrs, name, buf, size);
-}
-
 ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size)
 {
 	struct kernfs_node *kn = dentry->d_fsdata;
@@ -376,3 +306,83 @@ int kernfs_iop_permission(struct inode *inode, int mask)
 
 	return generic_permission(inode, mask);
 }
+
+static int kernfs_xattr_get(const struct xattr_handler *handler,
+			    struct dentry *unused, struct inode *inode,
+			    const char *suffix, void *value, size_t size)
+{
+	const char *name = xattr_full_name(handler, suffix);
+	struct kernfs_node *kn = inode->i_private;
+	struct kernfs_iattrs *attrs;
+
+	attrs = kernfs_iattrs(kn);
+	if (!attrs)
+		return -ENOMEM;
+
+	return simple_xattr_get(&attrs->xattrs, name, value, size);
+}
+
+static int kernfs_xattr_set(const struct xattr_handler *handler,
+			    struct dentry *unused, struct inode *inode,
+			    const char *suffix, const void *value,
+			    size_t size, int flags)
+{
+	const char *name = xattr_full_name(handler, suffix);
+	struct kernfs_node *kn = inode->i_private;
+	struct kernfs_iattrs *attrs;
+
+	attrs = kernfs_iattrs(kn);
+	if (!attrs)
+		return -ENOMEM;
+
+	return simple_xattr_set(&attrs->xattrs, name, value, size, flags);
+}
+
+const struct xattr_handler kernfs_trusted_xattr_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.get = kernfs_xattr_get,
+	.set = kernfs_xattr_set,
+};
+
+static int kernfs_security_xattr_set(const struct xattr_handler *handler,
+				     struct dentry *unused, struct inode *inode,
+				     const char *suffix, const void *value,
+				     size_t size, int flags)
+{
+	struct kernfs_node *kn = inode->i_private;
+	struct kernfs_iattrs *attrs;
+	void *secdata;
+	u32 secdata_len = 0;
+	int error;
+
+	attrs = kernfs_iattrs(kn);
+	if (!attrs)
+		return -ENOMEM;
+
+	error = security_inode_setsecurity(inode, suffix, value, size, flags);
+	if (error)
+		return error;
+	error = security_inode_getsecctx(inode, &secdata, &secdata_len);
+	if (error)
+		return error;
+
+	mutex_lock(&kernfs_mutex);
+	error = kernfs_node_setsecdata(attrs, &secdata, &secdata_len);
+	mutex_unlock(&kernfs_mutex);
+
+	if (secdata)
+		security_release_secctx(secdata, secdata_len);
+	return error;
+}
+
+const struct xattr_handler kernfs_security_xattr_handler = {
+	.prefix = XATTR_SECURITY_PREFIX,
+	.get = kernfs_xattr_get,
+	.set = kernfs_security_xattr_set,
+};
+
+const struct xattr_handler *kernfs_xattr_handlers[] = {
+	&kernfs_trusted_xattr_handler,
+	&kernfs_security_xattr_handler,
+	NULL
+};
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index 3715923..bfd551b 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -76,17 +76,12 @@ extern struct kmem_cache *kernfs_node_cache;
 /*
  * inode.c
  */
+extern const struct xattr_handler *kernfs_xattr_handlers[];
 void kernfs_evict_inode(struct inode *inode);
 int kernfs_iop_permission(struct inode *inode, int mask);
 int kernfs_iop_setattr(struct dentry *dentry, struct iattr *iattr);
 int kernfs_iop_getattr(struct vfsmount *mnt, struct dentry *dentry,
 		       struct kstat *stat);
-int kernfs_iop_setxattr(struct dentry *dentry, struct inode *inode,
-			const char *name, const void *value,
-			size_t size, int flags);
-int kernfs_iop_removexattr(struct dentry *dentry, const char *name);
-ssize_t kernfs_iop_getxattr(struct dentry *dentry, struct inode *inode,
-			    const char *name, void *buf, size_t size);
 ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size);
 
 /*
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index b3d73ad..d5b149a 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -158,6 +158,7 @@ static int kernfs_fill_super(struct super_block *sb, unsigned long magic)
 	sb->s_blocksize_bits = PAGE_SHIFT;
 	sb->s_magic = magic;
 	sb->s_op = &kernfs_sops;
+	sb->s_xattr = kernfs_xattr_handlers;
 	sb->s_time_gran = 1;
 
 	/* get root inode, initialize and unlock it */
diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c
index 117b8b3..549a14c7 100644
--- a/fs/kernfs/symlink.c
+++ b/fs/kernfs/symlink.c
@@ -134,9 +134,9 @@ static const char *kernfs_iop_get_link(struct dentry *dentry,
 }
 
 const struct inode_operations kernfs_symlink_iops = {
-	.setxattr	= kernfs_iop_setxattr,
-	.removexattr	= kernfs_iop_removexattr,
-	.getxattr	= kernfs_iop_getxattr,
+	.setxattr	= generic_setxattr,
+	.removexattr	= generic_removexattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= kernfs_iop_listxattr,
 	.readlink	= generic_readlink,
 	.get_link	= kernfs_iop_get_link,
-- 
2.7.4

[PATCH v4 09/20] sockfs: getxattr: Fail with -EOPNOTSUPP for invalid attribute names

[Andreas Gruenbacher]

The standard return value for unsupported attribute names is
-EOPNOTSUPP, as opposed to undefined but supported attributes
(-ENODATA).

Also, fail for attribute names like "system.sockprotonameXXX" and
simplify the code a bit.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 net/socket.c | 24 ++++++------------------
 1 file changed, 6 insertions(+), 18 deletions(-)

diff --git a/net/socket.c b/net/socket.c
index a1bd161..9b3dca6 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -469,27 +469,15 @@ static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
 static ssize_t sockfs_getxattr(struct dentry *dentry, struct inode *inode,
 			       const char *name, void *value, size_t size)
 {
-	const char *proto_name;
-	size_t proto_size;
-	int error;
-
-	error = -ENODATA;
-	if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) {
-		proto_name = dentry->d_name.name;
-		proto_size = strlen(proto_name);
-
+	if (!strcmp(name, XATTR_NAME_SOCKPROTONAME)) {
 		if (value) {
-			error = -ERANGE;
-			if (proto_size + 1 > size)
-				goto out;
-
-			strncpy(value, proto_name, proto_size + 1);
+			if (dentry->d_name.len + 1 > size)
+				return -ERANGE;
+			memcpy(value, dentry->d_name.name, dentry->d_name.len + 1);
 		}
-		error = proto_size + 1;
+		return dentry->d_name.len + 1;
 	}
-
-out:
-	return error;
+	return -EOPNOTSUPP;
 }
 
 static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer,
-- 
2.7.4

[PATCH v4 10/20] sockfs: Get rid of getxattr iop

[Andreas Gruenbacher]

If we allow pseudo-filesystems created with mount_pseudo to have xattr
handlers, we can replace sockfs_getxattr with a sockfs_xattr_get handler
to use the xattr handler name parsing.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/libfs.c         |  7 ++++---
 include/linux/fs.h | 17 +++++++++++++----
 net/socket.c       | 50 ++++++++++++++++++++++++++++++--------------------
 3 files changed, 47 insertions(+), 27 deletions(-)

diff --git a/fs/libfs.c b/fs/libfs.c
index 74dc8b9..cfa9576 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -236,8 +236,8 @@ static const struct super_operations simple_super_operations = {
  * Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that
  * will never be mountable)
  */
-struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name,
-	const struct super_operations *ops,
+struct dentry *mount_pseudo_xattr(struct file_system_type *fs_type, char *name,
+	const struct super_operations *ops, const struct xattr_handler **xattr,
 	const struct dentry_operations *dops, unsigned long magic)
 {
 	struct super_block *s;
@@ -254,6 +254,7 @@ struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name,
 	s->s_blocksize_bits = PAGE_SHIFT;
 	s->s_magic = magic;
 	s->s_op = ops ? ops : &simple_super_operations;
+	s->s_xattr = xattr;
 	s->s_time_gran = 1;
 	root = new_inode(s);
 	if (!root)
@@ -281,7 +282,7 @@ Enomem:
 	deactivate_locked_super(s);
 	return ERR_PTR(-ENOMEM);
 }
-EXPORT_SYMBOL(mount_pseudo);
+EXPORT_SYMBOL(mount_pseudo_xattr);
 
 int simple_open(struct inode *inode, struct file *file)
 {
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3523bf6..022aa88 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2074,10 +2074,19 @@ struct super_block *sget(struct file_system_type *type,
 			int (*test)(struct super_block *,void *),
 			int (*set)(struct super_block *,void *),
 			int flags, void *data);
-extern struct dentry *mount_pseudo(struct file_system_type *, char *,
-	const struct super_operations *ops,
-	const struct dentry_operations *dops,
-	unsigned long);
+extern struct dentry *mount_pseudo_xattr(struct file_system_type *, char *,
+					 const struct super_operations *ops,
+					 const struct xattr_handler **xattr,
+					 const struct dentry_operations *dops,
+					 unsigned long);
+
+static inline struct dentry *
+mount_pseudo(struct file_system_type *fs_type, char *name,
+	     const struct super_operations *ops,
+	     const struct dentry_operations *dops, unsigned long magic)
+{
+	return mount_pseudo_xattr(fs_type, name, ops, NULL, dops, magic);
+}
 
 /* Alas, no aliases. Too much hassle with bringing module.h everywhere */
 #define fops_get(fops) \
diff --git a/net/socket.c b/net/socket.c
index 9b3dca6..976f7324 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -320,11 +320,38 @@ static const struct dentry_operations sockfs_dentry_operations = {
 	.d_dname  = sockfs_dname,
 };
 
+static int sockfs_xattr_get(const struct xattr_handler *handler,
+			    struct dentry *dentry, struct inode *inode,
+			    const char *suffix, void *value, size_t size)
+{
+	if (value) {
+		if (dentry->d_name.len + 1 > size)
+			return -ERANGE;
+		memcpy(value, dentry->d_name.name, dentry->d_name.len + 1);
+	}
+	return dentry->d_name.len + 1;
+}
+
+#define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname"
+#define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX)
+#define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1)
+
+static const struct xattr_handler sockfs_xattr_handler = {
+	.name = XATTR_NAME_SOCKPROTONAME,
+	.get = sockfs_xattr_get,
+};
+
+static const struct xattr_handler *sockfs_xattr_handlers[] = {
+	&sockfs_xattr_handler,
+	NULL
+};
+
 static struct dentry *sockfs_mount(struct file_system_type *fs_type,
 			 int flags, const char *dev_name, void *data)
 {
-	return mount_pseudo(fs_type, "socket:", &sockfs_ops,
-		&sockfs_dentry_operations, SOCKFS_MAGIC);
+	return mount_pseudo_xattr(fs_type, "socket:", &sockfs_ops,
+				  sockfs_xattr_handlers,
+				  &sockfs_dentry_operations, SOCKFS_MAGIC);
 }
 
 static struct vfsmount *sock_mnt __read_mostly;
@@ -463,23 +490,6 @@ static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
 	return NULL;
 }
 
-#define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname"
-#define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX)
-#define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1)
-static ssize_t sockfs_getxattr(struct dentry *dentry, struct inode *inode,
-			       const char *name, void *value, size_t size)
-{
-	if (!strcmp(name, XATTR_NAME_SOCKPROTONAME)) {
-		if (value) {
-			if (dentry->d_name.len + 1 > size)
-				return -ERANGE;
-			memcpy(value, dentry->d_name.name, dentry->d_name.len + 1);
-		}
-		return dentry->d_name.len + 1;
-	}
-	return -EOPNOTSUPP;
-}
-
 static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer,
 				size_t size)
 {
@@ -509,7 +519,7 @@ static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer,
 }
 
 static const struct inode_operations sockfs_inode_ops = {
-	.getxattr = sockfs_getxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = sockfs_listxattr,
 };
 
-- 
2.7.4

[PATCH v4 11/20] ecryptfs: Switch to generic xattr handlers

[Andreas Gruenbacher]

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/ecryptfs/ecryptfs_kernel.h |  2 ++
 fs/ecryptfs/inode.c           | 62 +++++++++++++++++++++++++++++++++----------
 fs/ecryptfs/main.c            |  1 +
 3 files changed, 51 insertions(+), 14 deletions(-)

diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 4ba1547..599a292 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -715,4 +715,6 @@ int ecryptfs_set_f_namelen(long *namelen, long lower_namelen,
 int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat,
 		       loff_t offset);
 
+extern const struct xattr_handler *ecryptfs_xattr_handlers[];
+
 #endif /* #ifndef ECRYPTFS_KERNEL_H */
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 9d153b6..cef32cc 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1066,19 +1066,22 @@ out:
 	return rc;
 }
 
-static int ecryptfs_removexattr(struct dentry *dentry, const char *name)
+static int ecryptfs_removexattr(struct dentry *dentry, struct inode *inode,
+				const char *name)
 {
 	int rc = 0;
 	struct dentry *lower_dentry;
+	struct inode *lower_inode;
 
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
-	if (!d_inode(lower_dentry)->i_op->removexattr) {
+	lower_inode = ecryptfs_inode_to_lower(inode);
+	if (!lower_inode->i_op->removexattr) {
 		rc = -EOPNOTSUPP;
 		goto out;
 	}
-	inode_lock(d_inode(lower_dentry));
-	rc = d_inode(lower_dentry)->i_op->removexattr(lower_dentry, name);
-	inode_unlock(d_inode(lower_dentry));
+	inode_lock(lower_inode);
+	rc = lower_inode->i_op->removexattr(lower_dentry, name);
+	inode_unlock(lower_inode);
 out:
 	return rc;
 }
@@ -1089,10 +1092,10 @@ const struct inode_operations ecryptfs_symlink_iops = {
 	.permission = ecryptfs_permission,
 	.setattr = ecryptfs_setattr,
 	.getattr = ecryptfs_getattr_link,
-	.setxattr = ecryptfs_setxattr,
-	.getxattr = ecryptfs_getxattr,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = ecryptfs_listxattr,
-	.removexattr = ecryptfs_removexattr
+	.removexattr = generic_removexattr
 };
 
 const struct inode_operations ecryptfs_dir_iops = {
@@ -1107,18 +1110,49 @@ const struct inode_operations ecryptfs_dir_iops = {
 	.rename = ecryptfs_rename,
 	.permission = ecryptfs_permission,
 	.setattr = ecryptfs_setattr,
-	.setxattr = ecryptfs_setxattr,
-	.getxattr = ecryptfs_getxattr,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = ecryptfs_listxattr,
-	.removexattr = ecryptfs_removexattr
+	.removexattr = generic_removexattr
 };
 
 const struct inode_operations ecryptfs_main_iops = {
 	.permission = ecryptfs_permission,
 	.setattr = ecryptfs_setattr,
 	.getattr = ecryptfs_getattr,
-	.setxattr = ecryptfs_setxattr,
-	.getxattr = ecryptfs_getxattr,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
 	.listxattr = ecryptfs_listxattr,
-	.removexattr = ecryptfs_removexattr
+	.removexattr = generic_removexattr
+};
+
+static int ecryptfs_xattr_get(const struct xattr_handler *handler,
+			      struct dentry *dentry, struct inode *inode,
+			      const char *name, void *buffer, size_t size)
+{
+	return ecryptfs_getxattr(dentry, inode, name, buffer, size);
+}
+
+static int ecryptfs_xattr_set(const struct xattr_handler *handler,
+			      struct dentry *dentry, struct inode *inode,
+			      const char *name, const void *value, size_t size,
+			      int flags)
+{
+	if (value)
+		return ecryptfs_setxattr(dentry, inode, name, value, size, flags);
+	else {
+		BUG_ON(flags != XATTR_REPLACE);
+		return ecryptfs_removexattr(dentry, inode, name);
+	}
+}
+
+const struct xattr_handler ecryptfs_xattr_handler = {
+	.prefix = "",  /* match anything */
+	.get = ecryptfs_xattr_get,
+	.set = ecryptfs_xattr_set,
+};
+
+const struct xattr_handler *ecryptfs_xattr_handlers[] = {
+	&ecryptfs_xattr_handler,
+	NULL
 };
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 6120044..151872d 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -529,6 +529,7 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags
 	/* ->kill_sb() will take care of sbi after that point */
 	sbi = NULL;
 	s->s_op = &ecryptfs_sops;
+	s->s_xattr = ecryptfs_xattr_handlers;
 	s->s_d_op = &ecryptfs_dops;
 
 	err = "Reading sb failed";
-- 
2.7.4

[PATCH v4 12/20] fuse: Switch to generic xattr handlers

[Andreas Gruenbacher]

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/fuse/dir.c    | 58 ++++++++++++++++++++++++++++++++++++++++++--------------
 fs/fuse/fuse_i.h |  2 ++
 fs/fuse/inode.c  |  1 +
 3 files changed, 47 insertions(+), 14 deletions(-)

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index c47b778..3408a37 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -13,6 +13,7 @@
 #include <linux/sched.h>
 #include <linux/namei.h>
 #include <linux/slab.h>
+#include <linux/xattr.h>
 
 static bool fuse_use_readdirplus(struct inode *dir, struct dir_context *ctx)
 {
@@ -1724,9 +1725,8 @@ static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry,
 	return fuse_update_attributes(inode, stat, NULL, NULL);
 }
 
-static int fuse_setxattr(struct dentry *unused, struct inode *inode,
-			 const char *name, const void *value,
-			 size_t size, int flags)
+static int fuse_setxattr(struct inode *inode, const char *name,
+			 const void *value, size_t size, int flags)
 {
 	struct fuse_conn *fc = get_fuse_conn(inode);
 	FUSE_ARGS(args);
@@ -1843,9 +1843,8 @@ static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
 	return ret;
 }
 
-static int fuse_removexattr(struct dentry *entry, const char *name)
+static int fuse_removexattr(struct inode *inode, const char *name)
 {
-	struct inode *inode = d_inode(entry);
 	struct fuse_conn *fc = get_fuse_conn(inode);
 	FUSE_ARGS(args);
 	int err;
@@ -1884,10 +1883,10 @@ static const struct inode_operations fuse_dir_inode_operations = {
 	.mknod		= fuse_mknod,
 	.permission	= fuse_permission,
 	.getattr	= fuse_getattr,
-	.setxattr	= fuse_setxattr,
-	.getxattr	= fuse_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= fuse_listxattr,
-	.removexattr	= fuse_removexattr,
+	.removexattr	= generic_removexattr,
 };
 
 static const struct file_operations fuse_dir_operations = {
@@ -1905,10 +1904,10 @@ static const struct inode_operations fuse_common_inode_operations = {
 	.setattr	= fuse_setattr,
 	.permission	= fuse_permission,
 	.getattr	= fuse_getattr,
-	.setxattr	= fuse_setxattr,
-	.getxattr	= fuse_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= fuse_listxattr,
-	.removexattr	= fuse_removexattr,
+	.removexattr	= generic_removexattr,
 };
 
 static const struct inode_operations fuse_symlink_inode_operations = {
@@ -1916,10 +1915,10 @@ static const struct inode_operations fuse_symlink_inode_operations = {
 	.get_link	= fuse_get_link,
 	.readlink	= generic_readlink,
 	.getattr	= fuse_getattr,
-	.setxattr	= fuse_setxattr,
-	.getxattr	= fuse_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= fuse_listxattr,
-	.removexattr	= fuse_removexattr,
+	.removexattr	= generic_removexattr,
 };
 
 void fuse_init_common(struct inode *inode)
@@ -1937,3 +1936,34 @@ void fuse_init_symlink(struct inode *inode)
 {
 	inode->i_op = &fuse_symlink_inode_operations;
 }
+
+static int fuse_xattr_get(const struct xattr_handler *handler,
+		          struct dentry *dentry, struct inode *inode,
+		          const char *name, void *buffer, size_t size)
+{
+       return fuse_getxattr(dentry, inode, name, buffer, size);
+}
+
+static int fuse_xattr_set(const struct xattr_handler *handler,
+		          struct dentry *dentry, struct inode *inode,
+			  const char *name, const void *value, size_t size,
+			  int flags)
+{
+       if (value)
+		return fuse_setxattr(inode, name, value, size, flags);
+       else {
+		BUG_ON(flags != XATTR_REPLACE);
+		return fuse_removexattr(inode, name);
+       }
+}
+
+const struct xattr_handler fuse_xattr_handler = {
+       .prefix = "",  /* match anything */
+       .get = fuse_xattr_get,
+       .set = fuse_xattr_set,
+};
+
+const struct xattr_handler *fuse_xattr_handlers[] = {
+       &fuse_xattr_handler,
+       NULL
+};
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index d98d8cc..87938dc 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -966,4 +966,6 @@ void fuse_set_initialized(struct fuse_conn *fc);
 void fuse_unlock_inode(struct inode *inode);
 void fuse_lock_inode(struct inode *inode);
 
+extern const struct xattr_handler *fuse_xattr_handlers[];
+
 #endif /* _FS_FUSE_I_H */
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 4e05b51..1e535f3 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -1071,6 +1071,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 	}
 	sb->s_magic = FUSE_SUPER_MAGIC;
 	sb->s_op = &fuse_super_operations;
+	sb->s_xattr = fuse_xattr_handlers;
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
 	sb->s_time_gran = 1;
 	sb->s_export_op = &fuse_export_operations;
-- 
2.7.4

[PATCH v4 13/20] vfs: Move xattr_resolve_name to the front of fs/xattr.c

[Andreas Gruenbacher]

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/xattr.c | 101 ++++++++++++++++++++++++++++++-------------------------------
 1 file changed, 50 insertions(+), 51 deletions(-)

diff --git a/fs/xattr.c b/fs/xattr.c
index 1f72c92..bb3cbbf 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -24,6 +24,56 @@
 
 #include <asm/uaccess.h>
 
+static const char *
+strcmp_prefix(const char *a, const char *a_prefix)
+{
+	while (*a_prefix && *a == *a_prefix) {
+		a++;
+		a_prefix++;
+	}
+	return *a_prefix ? NULL : a;
+}
+
+/*
+ * In order to implement different sets of xattr operations for each xattr
+ * prefix with the generic xattr API, a filesystem should create a
+ * null-terminated array of struct xattr_handler (one for each prefix) and
+ * hang a pointer to it off of the s_xattr field of the superblock.
+ *
+ * The generic_fooxattr() functions will use this list to dispatch xattr
+ * operations to the correct xattr_handler.
+ */
+#define for_each_xattr_handler(handlers, handler)		\
+	if (handlers)						\
+		for ((handler) = *(handlers)++;			\
+			(handler) != NULL;			\
+			(handler) = *(handlers)++)
+
+/*
+ * Find the xattr_handler with the matching prefix.
+ */
+static const struct xattr_handler *
+xattr_resolve_name(const struct xattr_handler **handlers, const char **name)
+{
+	const struct xattr_handler *handler;
+
+	for_each_xattr_handler(handlers, handler) {
+		const char *n;
+
+		n = strcmp_prefix(*name, xattr_prefix(handler));
+		if (n) {
+			if (!handler->prefix ^ !*n) {
+				if (*n)
+					continue;
+				return ERR_PTR(-EINVAL);
+			}
+			*name = n;
+			return handler;
+		}
+	}
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
 /*
  * Check permissions for extended attribute access.  This is a bit complicated
  * because different namespaces have very different rules.
@@ -641,57 +691,6 @@ SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
 	return error;
 }
 
-
-static const char *
-strcmp_prefix(const char *a, const char *a_prefix)
-{
-	while (*a_prefix && *a == *a_prefix) {
-		a++;
-		a_prefix++;
-	}
-	return *a_prefix ? NULL : a;
-}
-
-/*
- * In order to implement different sets of xattr operations for each xattr
- * prefix with the generic xattr API, a filesystem should create a
- * null-terminated array of struct xattr_handler (one for each prefix) and
- * hang a pointer to it off of the s_xattr field of the superblock.
- *
- * The generic_fooxattr() functions will use this list to dispatch xattr
- * operations to the correct xattr_handler.
- */
-#define for_each_xattr_handler(handlers, handler)		\
-	if (handlers)						\
-		for ((handler) = *(handlers)++;			\
-			(handler) != NULL;			\
-			(handler) = *(handlers)++)
-
-/*
- * Find the xattr_handler with the matching prefix.
- */
-static const struct xattr_handler *
-xattr_resolve_name(const struct xattr_handler **handlers, const char **name)
-{
-	const struct xattr_handler *handler;
-
-	for_each_xattr_handler(handlers, handler) {
-		const char *n;
-
-		n = strcmp_prefix(*name, xattr_prefix(handler));
-		if (n) {
-			if (!handler->prefix ^ !*n) {
-				if (*n)
-					continue;
-				return ERR_PTR(-EINVAL);
-			}
-			*name = n;
-			return handler;
-		}
-	}
-	return ERR_PTR(-EOPNOTSUPP);
-}
-
 /*
  * Find the handler for the prefix and dispatch its get() operation.
  */
-- 
2.7.4

[PATCH v4 14/20] vfs: Add IOP_XATTR inode operations flag

[Andreas Gruenbacher]

The IOP_XATTR inode operations flag in inode->i_opflags indicates that
the inode has xattr support.  The flag is automatically set by
new_inode() on filesystems with xattr support (where sb->s_xattr is
defined), and cleared otherwise.  Filesystems can explicitly clear it
for inodes that should not have xattr support.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/inode.c         |  2 ++
 fs/xattr.c         | 12 ++++++++----
 include/linux/fs.h |  1 +
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/fs/inode.c b/fs/inode.c
index 7e3ef3a..705f860 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -140,6 +140,8 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
 	inode->i_fop = &no_open_fops;
 	inode->__i_nlink = 1;
 	inode->i_opflags = 0;
+	if (sb->s_xattr)
+		inode->i_opflags |= IOP_XATTR;
 	i_uid_write(inode, 0);
 	i_gid_write(inode, 0);
 	atomic_set(&inode->i_writecount, 0);
diff --git a/fs/xattr.c b/fs/xattr.c
index bb3cbbf..38b52a3 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -53,10 +53,13 @@ strcmp_prefix(const char *a, const char *a_prefix)
  * Find the xattr_handler with the matching prefix.
  */
 static const struct xattr_handler *
-xattr_resolve_name(const struct xattr_handler **handlers, const char **name)
+xattr_resolve_name(struct inode *inode, const char **name)
 {
+	const struct xattr_handler **handlers = inode->i_sb->s_xattr;
 	const struct xattr_handler *handler;
 
+	if (!(inode->i_opflags & IOP_XATTR))
+		return ERR_PTR(-EOPNOTSUPP);
 	for_each_xattr_handler(handlers, handler) {
 		const char *n;
 
@@ -298,6 +301,7 @@ nolsm:
 		error = -EOPNOTSUPP;
 
 	return error;
+
 }
 EXPORT_SYMBOL_GPL(vfs_getxattr);
 
@@ -700,7 +704,7 @@ generic_getxattr(struct dentry *dentry, struct inode *inode,
 {
 	const struct xattr_handler *handler;
 
-	handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name);
+	handler = xattr_resolve_name(inode, &name);
 	if (IS_ERR(handler))
 		return PTR_ERR(handler);
 	return handler->get(handler, dentry, inode,
@@ -755,7 +759,7 @@ generic_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
 
 	if (size == 0)
 		value = "";  /* empty EA, do not remove */
-	handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name);
+	handler = xattr_resolve_name(inode, &name);
 	if (IS_ERR(handler))
 		return PTR_ERR(handler);
 	return handler->set(handler, dentry, inode, name, value, size, flags);
@@ -770,7 +774,7 @@ generic_removexattr(struct dentry *dentry, const char *name)
 {
 	const struct xattr_handler *handler;
 
-	handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name);
+	handler = xattr_resolve_name(d_inode(dentry), &name);
 	if (IS_ERR(handler))
 		return PTR_ERR(handler);
 	return handler->set(handler, dentry, d_inode(dentry), name, NULL,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 022aa88..c97a20c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -590,6 +590,7 @@ is_uncached_acl(struct posix_acl *acl)
 #define IOP_FASTPERM	0x0001
 #define IOP_LOOKUP	0x0002
 #define IOP_NOFOLLOW	0x0004
+#define IOP_XATTR	0x0008
 
 /*
  * Keep mostly read-only and often accessed (especially for
-- 
2.7.4

[PATCH v4 15/20] vfs: Use IOP_XATTR flag for bad-inode handling

[Andreas Gruenbacher]

With this change, all the xattr handler based operations will produce an
-EIO result for bad inodes, and we no longer only depend on inode->i_op
to be set to bad_inode_ops.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/bad_inode.c | 21 +--------------------
 fs/xattr.c     |  8 +++++++-
 2 files changed, 8 insertions(+), 21 deletions(-)

diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 3ba385e..7bb153c 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -100,29 +100,12 @@ static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
 	return -EIO;
 }
 
-static int bad_inode_setxattr(struct dentry *dentry, struct inode *inode,
-		const char *name, const void *value, size_t size, int flags)
-{
-	return -EIO;
-}
-
-static ssize_t bad_inode_getxattr(struct dentry *dentry, struct inode *inode,
-			const char *name, void *buffer, size_t size)
-{
-	return -EIO;
-}
-
 static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
 			size_t buffer_size)
 {
 	return -EIO;
 }
 
-static int bad_inode_removexattr(struct dentry *dentry, const char *name)
-{
-	return -EIO;
-}
-
 static const struct inode_operations bad_inode_ops =
 {
 	.create		= bad_inode_create,
@@ -142,10 +125,7 @@ static const struct inode_operations bad_inode_ops =
 	.permission	= bad_inode_permission,
 	.getattr	= bad_inode_getattr,
 	.setattr	= bad_inode_setattr,
-	.setxattr	= bad_inode_setxattr,
-	.getxattr	= bad_inode_getxattr,
 	.listxattr	= bad_inode_listxattr,
-	.removexattr	= bad_inode_removexattr,
 };
 
 
@@ -175,6 +155,7 @@ void make_bad_inode(struct inode *inode)
 	inode->i_atime = inode->i_mtime = inode->i_ctime =
 		current_fs_time(inode->i_sb);
 	inode->i_op = &bad_inode_ops;	
+	inode->i_opflags &= ~IOP_XATTR;
 	inode->i_fop = &bad_file_ops;	
 }
 EXPORT_SYMBOL(make_bad_inode);
diff --git a/fs/xattr.c b/fs/xattr.c
index 38b52a3..1f5d0b4 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -58,8 +58,11 @@ xattr_resolve_name(struct inode *inode, const char **name)
 	const struct xattr_handler **handlers = inode->i_sb->s_xattr;
 	const struct xattr_handler *handler;
 
-	if (!(inode->i_opflags & IOP_XATTR))
+	if (!(inode->i_opflags & IOP_XATTR)) {
+		if (unlikely(is_bad_inode(inode)))
+			return ERR_PTR(-EIO);
 		return ERR_PTR(-EOPNOTSUPP);
+	}
 	for_each_xattr_handler(handlers, handler) {
 		const char *n;
 
@@ -168,6 +171,9 @@ int __vfs_setxattr_noperm(struct dentry *dentry, const char *name,
 		}
 	} else if (issec) {
 		const char *suffix = name + XATTR_SECURITY_PREFIX_LEN;
+
+		if (unlikely(is_bad_inode(inode)))
+			return -EIO;
 		error = security_inode_setsecurity(inode, suffix, value,
 						   size, flags);
 		if (!error)
-- 
2.7.4

[PATCH v4 16/20] libfs: Use IOP_XATTR flag for empty directory handling

[Andreas Gruenbacher]

Instead of special xattr inode operations, use the IOP_XATTR inode
operations flag for the special libfs empty directories.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/libfs.c | 22 +---------------------
 1 file changed, 1 insertion(+), 21 deletions(-)

diff --git a/fs/libfs.c b/fs/libfs.c
index cfa9576..b322d75 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1150,24 +1150,6 @@ static int empty_dir_setattr(struct dentry *dentry, struct iattr *attr)
 	return -EPERM;
 }
 
-static int empty_dir_setxattr(struct dentry *dentry, struct inode *inode,
-			      const char *name, const void *value,
-			      size_t size, int flags)
-{
-	return -EOPNOTSUPP;
-}
-
-static ssize_t empty_dir_getxattr(struct dentry *dentry, struct inode *inode,
-				  const char *name, void *value, size_t size)
-{
-	return -EOPNOTSUPP;
-}
-
-static int empty_dir_removexattr(struct dentry *dentry, const char *name)
-{
-	return -EOPNOTSUPP;
-}
-
 static ssize_t empty_dir_listxattr(struct dentry *dentry, char *list, size_t size)
 {
 	return -EOPNOTSUPP;
@@ -1178,9 +1160,6 @@ static const struct inode_operations empty_dir_inode_operations = {
 	.permission	= generic_permission,
 	.setattr	= empty_dir_setattr,
 	.getattr	= empty_dir_getattr,
-	.setxattr	= empty_dir_setxattr,
-	.getxattr	= empty_dir_getxattr,
-	.removexattr	= empty_dir_removexattr,
 	.listxattr	= empty_dir_listxattr,
 };
 
@@ -1216,6 +1195,7 @@ void make_empty_dir_inode(struct inode *inode)
 	inode->i_blocks = 0;
 
 	inode->i_op = &empty_dir_inode_operations;
+	inode->i_opflags &= ~IOP_XATTR;
 	inode->i_fop = &empty_dir_operations;
 }
 
-- 
2.7.4

[PATCH v4 17/20] xattr: Add __vfs_{get,set,remove}xattr helpers

[Andreas Gruenbacher]

Right now, various places in the kernel check for the existence of
getxattr, setxattr, and removexattr inode operations and directly call
those operations.  Switch to helper functions and test for the IOP_XATTR
flag instead.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Acked-by: James Morris <james.l.morris@oracle.com>
---
 fs/cachefiles/bind.c                  |  4 ++--
 fs/cachefiles/namei.c                 |  4 ++--
 fs/ecryptfs/inode.c                   | 18 +++++++-------
 fs/ecryptfs/mmap.c                    | 13 +++++------
 fs/overlayfs/copy_up.c                |  4 ++--
 fs/overlayfs/super.c                  |  4 ++--
 fs/xattr.c                            | 44 ++++++++++++++++++++++++++---------
 include/linux/xattr.h                 |  3 +++
 security/commoncap.c                  | 25 ++++++++------------
 security/integrity/evm/evm_crypto.c   |  7 +++---
 security/integrity/evm/evm_main.c     |  4 ++--
 security/integrity/ima/ima_appraise.c | 21 ++++++++---------
 security/selinux/hooks.c              | 19 ++++++---------
 security/smack/smack_lsm.c            | 12 +++++-----
 14 files changed, 97 insertions(+), 85 deletions(-)

diff --git a/fs/cachefiles/bind.c b/fs/cachefiles/bind.c
index 6af790f..3ff867f 100644
--- a/fs/cachefiles/bind.c
+++ b/fs/cachefiles/bind.c
@@ -20,6 +20,7 @@
 #include <linux/mount.h>
 #include <linux/statfs.h>
 #include <linux/ctype.h>
+#include <linux/xattr.h>
 #include "internal.h"
 
 static int cachefiles_daemon_add_cache(struct cachefiles_cache *caches);
@@ -126,8 +127,7 @@ static int cachefiles_daemon_add_cache(struct cachefiles_cache *cache)
 	if (d_is_negative(root) ||
 	    !d_backing_inode(root)->i_op->lookup ||
 	    !d_backing_inode(root)->i_op->mkdir ||
-	    !d_backing_inode(root)->i_op->setxattr ||
-	    !d_backing_inode(root)->i_op->getxattr ||
+	    !(d_backing_inode(root)->i_opflags & IOP_XATTR) ||
 	    !root->d_sb->s_op->statfs ||
 	    !root->d_sb->s_op->sync_fs)
 		goto error_unsupported;
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index 3f7c2cd..6eb3dec 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -20,6 +20,7 @@
 #include <linux/namei.h>
 #include <linux/security.h>
 #include <linux/slab.h>
+#include <linux/xattr.h>
 #include "internal.h"
 
 #define CACHEFILES_KEYBUF_SIZE 512
@@ -799,8 +800,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
 	}
 
 	ret = -EPERM;
-	if (!d_backing_inode(subdir)->i_op->setxattr ||
-	    !d_backing_inode(subdir)->i_op->getxattr ||
+	if (!(d_backing_inode(subdir)->i_opflags & IOP_XATTR) ||
 	    !d_backing_inode(subdir)->i_op->lookup ||
 	    !d_backing_inode(subdir)->i_op->mkdir ||
 	    !d_backing_inode(subdir)->i_op->create ||
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index cef32cc..32fee25 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1005,15 +1005,14 @@ ecryptfs_setxattr(struct dentry *dentry, struct inode *inode,
 		  const char *name, const void *value,
 		  size_t size, int flags)
 {
-	int rc = 0;
+	int rc;
 	struct dentry *lower_dentry;
 
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
-	if (!d_inode(lower_dentry)->i_op->setxattr) {
+	if (!(d_inode(lower_dentry)->i_opflags & IOP_XATTR)) {
 		rc = -EOPNOTSUPP;
 		goto out;
 	}
-
 	rc = vfs_setxattr(lower_dentry, name, value, size, flags);
 	if (!rc && inode)
 		fsstack_copy_attr_all(inode, d_inode(lower_dentry));
@@ -1025,15 +1024,14 @@ ssize_t
 ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode,
 			const char *name, void *value, size_t size)
 {
-	int rc = 0;
+	int rc;
 
-	if (!lower_inode->i_op->getxattr) {
+	if (!(lower_inode->i_opflags & IOP_XATTR)) {
 		rc = -EOPNOTSUPP;
 		goto out;
 	}
 	inode_lock(lower_inode);
-	rc = lower_inode->i_op->getxattr(lower_dentry, lower_inode,
-					 name, value, size);
+	rc = __vfs_getxattr(lower_dentry, lower_inode, name, value, size);
 	inode_unlock(lower_inode);
 out:
 	return rc;
@@ -1069,18 +1067,18 @@ out:
 static int ecryptfs_removexattr(struct dentry *dentry, struct inode *inode,
 				const char *name)
 {
-	int rc = 0;
+	int rc;
 	struct dentry *lower_dentry;
 	struct inode *lower_inode;
 
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
 	lower_inode = ecryptfs_inode_to_lower(inode);
-	if (!lower_inode->i_op->removexattr) {
+	if (!(lower_inode->i_opflags & IOP_XATTR)) {
 		rc = -EOPNOTSUPP;
 		goto out;
 	}
 	inode_lock(lower_inode);
-	rc = lower_inode->i_op->removexattr(lower_dentry, name);
+	rc = __vfs_removexattr(lower_dentry, name);
 	inode_unlock(lower_inode);
 out:
 	return rc;
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 9c3437c..1f0c471 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -32,6 +32,7 @@
 #include <linux/file.h>
 #include <linux/scatterlist.h>
 #include <linux/slab.h>
+#include <linux/xattr.h>
 #include <asm/unaligned.h>
 #include "ecryptfs_kernel.h"
 
@@ -422,7 +423,7 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode)
 	struct inode *lower_inode = d_inode(lower_dentry);
 	int rc;
 
-	if (!lower_inode->i_op->getxattr || !lower_inode->i_op->setxattr) {
+	if (!(lower_inode->i_opflags & IOP_XATTR)) {
 		printk(KERN_WARNING
 		       "No support for setting xattr in lower filesystem\n");
 		rc = -ENOSYS;
@@ -436,15 +437,13 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode)
 		goto out;
 	}
 	inode_lock(lower_inode);
-	size = lower_inode->i_op->getxattr(lower_dentry, lower_inode,
-					   ECRYPTFS_XATTR_NAME,
-					   xattr_virt, PAGE_SIZE);
+	size = __vfs_getxattr(lower_dentry, lower_inode, ECRYPTFS_XATTR_NAME,
+			      xattr_virt, PAGE_SIZE);
 	if (size < 0)
 		size = 8;
 	put_unaligned_be64(i_size_read(ecryptfs_inode), xattr_virt);
-	rc = lower_inode->i_op->setxattr(lower_dentry, lower_inode,
-					 ECRYPTFS_XATTR_NAME,
-					 xattr_virt, size, 0);
+	rc = __vfs_setxattr(lower_dentry, lower_inode, ECRYPTFS_XATTR_NAME,
+			    xattr_virt, size, 0);
 	inode_unlock(lower_inode);
 	if (rc)
 		printk(KERN_ERR "Error whilst attempting to write inode size "
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 54e5d66..b71b11a 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -58,8 +58,8 @@ int ovl_copy_xattr(struct dentry *old, struct dentry *new)
 	char *buf, *name, *value = NULL;
 	int uninitialized_var(error);
 
-	if (!old->d_inode->i_op->getxattr ||
-	    !new->d_inode->i_op->getxattr)
+	if (!(old->d_inode->i_opflags & IOP_XATTR) ||
+	    !(new->d_inode->i_opflags & IOP_XATTR))
 		return 0;
 
 	list_size = vfs_listxattr(old, NULL, 0);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 762f3ad..28bff78 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -275,10 +275,10 @@ static bool ovl_is_opaquedir(struct dentry *dentry)
 	char val;
 	struct inode *inode = dentry->d_inode;
 
-	if (!S_ISDIR(inode->i_mode) || !inode->i_op->getxattr)
+	if (!S_ISDIR(inode->i_mode) || !(inode->i_opflags & IOP_XATTR))
 		return false;
 
-	res = inode->i_op->getxattr(dentry, inode, OVL_XATTR_OPAQUE, &val, 1);
+	res = __vfs_getxattr(dentry, inode, OVL_XATTR_OPAQUE, &val, 1);
 	if (res == 1 && val == 'y')
 		return true;
 
diff --git a/fs/xattr.c b/fs/xattr.c
index 1f5d0b4..54a4115 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -136,6 +136,16 @@ xattr_permission(struct inode *inode, const char *name, int mask)
 	return inode_permission(inode, mask);
 }
 
+int
+__vfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
+	       const void *value, size_t size, int flags)
+{
+	if (!inode->i_op->setxattr)
+		return -EOPNOTSUPP;
+	return inode->i_op->setxattr(dentry, inode, name, value, size, flags);
+}
+EXPORT_SYMBOL(__vfs_setxattr);
+
 /**
  *  __vfs_setxattr_noperm - perform setxattr operation without performing
  *  permission checks.
@@ -163,7 +173,7 @@ int __vfs_setxattr_noperm(struct dentry *dentry, const char *name,
 	if (issec)
 		inode->i_flags &= ~S_NOSEC;
 	if (inode->i_op->setxattr) {
-		error = inode->i_op->setxattr(dentry, inode, name, value, size, flags);
+		error = __vfs_setxattr(dentry, inode, name, value, size, flags);
 		if (!error) {
 			fsnotify_xattr(dentry);
 			security_inode_post_setxattr(dentry, name, value,
@@ -275,6 +285,16 @@ vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value,
 }
 
 ssize_t
+__vfs_getxattr(struct dentry *dentry, struct inode *inode, const char *name,
+	       void *value, size_t size)
+{
+	if (!inode->i_op->getxattr)
+		return -EOPNOTSUPP;
+	return inode->i_op->getxattr(dentry, inode, name, value, size);
+}
+EXPORT_SYMBOL(__vfs_getxattr);
+
+ssize_t
 vfs_getxattr(struct dentry *dentry, const char *name, void *value, size_t size)
 {
 	struct inode *inode = dentry->d_inode;
@@ -301,13 +321,7 @@ vfs_getxattr(struct dentry *dentry, const char *name, void *value, size_t size)
 		return ret;
 	}
 nolsm:
-	if (inode->i_op->getxattr)
-		error = inode->i_op->getxattr(dentry, inode, name, value, size);
-	else
-		error = -EOPNOTSUPP;
-
-	return error;
-
+	return __vfs_getxattr(dentry, inode, name, value, size);
 }
 EXPORT_SYMBOL_GPL(vfs_getxattr);
 
@@ -332,13 +346,21 @@ vfs_listxattr(struct dentry *d, char *list, size_t size)
 EXPORT_SYMBOL_GPL(vfs_listxattr);
 
 int
-vfs_removexattr(struct dentry *dentry, const char *name)
+__vfs_removexattr(struct dentry *dentry, const char *name)
 {
 	struct inode *inode = dentry->d_inode;
-	int error;
 
 	if (!inode->i_op->removexattr)
 		return -EOPNOTSUPP;
+	return inode->i_op->removexattr(dentry, name);
+}
+EXPORT_SYMBOL(__vfs_removexattr);
+
+int
+vfs_removexattr(struct dentry *dentry, const char *name)
+{
+	struct inode *inode = dentry->d_inode;
+	int error;
 
 	error = xattr_permission(inode, name, MAY_WRITE);
 	if (error)
@@ -349,7 +371,7 @@ vfs_removexattr(struct dentry *dentry, const char *name)
 	if (error)
 		goto out;
 
-	error = inode->i_op->removexattr(dentry, name);
+	error = __vfs_removexattr(dentry, name);
 
 	if (!error) {
 		fsnotify_xattr(dentry);
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index 94079ba..6ae6b2e 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -46,10 +46,13 @@ struct xattr {
 };
 
 ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t);
+ssize_t __vfs_getxattr(struct dentry *, struct inode *, const char *, void *, size_t);
 ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t);
 ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
+int __vfs_setxattr(struct dentry *, struct inode *, const char *, const void *, size_t, int);
 int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int);
 int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int);
+int __vfs_removexattr(struct dentry *, const char *);
 int vfs_removexattr(struct dentry *, const char *);
 
 ssize_t generic_getxattr(struct dentry *dentry, struct inode *inode, const char *name, void *buffer, size_t size);
diff --git a/security/commoncap.c b/security/commoncap.c
index 14540bd..8df676f 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -310,13 +310,8 @@ int cap_inode_need_killpriv(struct dentry *dentry)
 	struct inode *inode = d_backing_inode(dentry);
 	int error;
 
-	if (!inode->i_op->getxattr)
-	       return 0;
-
-	error = inode->i_op->getxattr(dentry, inode, XATTR_NAME_CAPS, NULL, 0);
-	if (error <= 0)
-		return 0;
-	return 1;
+	error = __vfs_getxattr(dentry, inode, XATTR_NAME_CAPS, NULL, 0);
+	return error > 0;
 }
 
 /**
@@ -329,12 +324,12 @@ int cap_inode_need_killpriv(struct dentry *dentry)
  */
 int cap_inode_killpriv(struct dentry *dentry)
 {
-	struct inode *inode = d_backing_inode(dentry);
-
-	if (!inode->i_op->removexattr)
-	       return 0;
+	int error;
 
-	return inode->i_op->removexattr(dentry, XATTR_NAME_CAPS);
+	error = __vfs_removexattr(dentry, XATTR_NAME_CAPS);
+	if (error == -EOPNOTSUPP)
+		error = 0;
+	return error;
 }
 
 /*
@@ -394,11 +389,11 @@ int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data
 
 	memset(cpu_caps, 0, sizeof(struct cpu_vfs_cap_data));
 
-	if (!inode || !inode->i_op->getxattr)
+	if (!inode)
 		return -ENODATA;
 
-	size = inode->i_op->getxattr((struct dentry *)dentry, inode,
-				     XATTR_NAME_CAPS, &caps, XATTR_CAPS_SZ);
+	size = __vfs_getxattr((struct dentry *)dentry, inode,
+			      XATTR_NAME_CAPS, &caps, XATTR_CAPS_SZ);
 	if (size == -ENODATA || size == -EOPNOTSUPP)
 		/* no data, that's ok */
 		return -ENODATA;
diff --git a/security/integrity/evm/evm_crypto.c b/security/integrity/evm/evm_crypto.c
index 11c1d30..bf66391 100644
--- a/security/integrity/evm/evm_crypto.c
+++ b/security/integrity/evm/evm_crypto.c
@@ -182,8 +182,9 @@ static int evm_calc_hmac_or_hash(struct dentry *dentry,
 	int error;
 	int size;
 
-	if (!inode->i_op->getxattr)
+	if (!(inode->i_opflags & IOP_XATTR))
 		return -EOPNOTSUPP;
+
 	desc = init_desc(type);
 	if (IS_ERR(desc))
 		return PTR_ERR(desc);
@@ -253,8 +254,8 @@ int evm_update_evmxattr(struct dentry *dentry, const char *xattr_name,
 		rc = __vfs_setxattr_noperm(dentry, XATTR_NAME_EVM,
 					   &xattr_data,
 					   sizeof(xattr_data), 0);
-	} else if (rc == -ENODATA && inode->i_op->removexattr) {
-		rc = inode->i_op->removexattr(dentry, XATTR_NAME_EVM);
+	} else if (rc == -ENODATA && (inode->i_opflags & IOP_XATTR)) {
+		rc = __vfs_removexattr(dentry, XATTR_NAME_EVM);
 	}
 	return rc;
 }
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index b9e2628..ba86155 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -78,11 +78,11 @@ static int evm_find_protected_xattrs(struct dentry *dentry)
 	int error;
 	int count = 0;
 
-	if (!inode->i_op->getxattr)
+	if (!(inode->i_opflags & IOP_XATTR))
 		return -EOPNOTSUPP;
 
 	for (xattr = evm_config_xattrnames; *xattr != NULL; xattr++) {
-		error = inode->i_op->getxattr(dentry, inode, *xattr, NULL, 0);
+		error = __vfs_getxattr(dentry, inode, *xattr, NULL, 0);
 		if (error < 0) {
 			if (error == -ENODATA)
 				continue;
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 4b9b4a4..0cc40af 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -165,13 +165,13 @@ enum hash_algo ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value,
 int ima_read_xattr(struct dentry *dentry,
 		   struct evm_ima_xattr_data **xattr_value)
 {
-	struct inode *inode = d_backing_inode(dentry);
-
-	if (!inode->i_op->getxattr)
-		return 0;
+	ssize_t ret;
 
-	return vfs_getxattr_alloc(dentry, XATTR_NAME_IMA, (char **)xattr_value,
-				  0, GFP_NOFS);
+	ret = vfs_getxattr_alloc(dentry, XATTR_NAME_IMA, (char **)xattr_value,
+				 0, GFP_NOFS);
+	if (ret == -EOPNOTSUPP)
+		ret = 0;
+	return ret;
 }
 
 /*
@@ -195,7 +195,7 @@ int ima_appraise_measurement(enum ima_hooks func,
 	enum integrity_status status = INTEGRITY_UNKNOWN;
 	int rc = xattr_len, hash_start = 0;
 
-	if (!inode->i_op->getxattr)
+	if (!(inode->i_opflags & IOP_XATTR))
 		return INTEGRITY_UNKNOWN;
 
 	if (rc <= 0) {
@@ -322,10 +322,10 @@ void ima_inode_post_setattr(struct dentry *dentry)
 {
 	struct inode *inode = d_backing_inode(dentry);
 	struct integrity_iint_cache *iint;
-	int must_appraise, rc;
+	int must_appraise;
 
 	if (!(ima_policy_flag & IMA_APPRAISE) || !S_ISREG(inode->i_mode)
-	    || !inode->i_op->removexattr)
+	    || !(inode->i_opflags & IOP_XATTR))
 		return;
 
 	must_appraise = ima_must_appraise(inode, MAY_ACCESS, POST_SETATTR);
@@ -338,8 +338,7 @@ void ima_inode_post_setattr(struct dentry *dentry)
 			iint->flags |= IMA_APPRAISE;
 	}
 	if (!must_appraise)
-		rc = inode->i_op->removexattr(dentry, XATTR_NAME_IMA);
-	return;
+		__vfs_removexattr(dentry, XATTR_NAME_IMA);
 }
 
 /*
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 13185a6..3db31ac 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -507,14 +507,14 @@ static int sb_finish_set_opts(struct super_block *sb)
 		   the root directory.  -ENODATA is ok, as this may be
 		   the first boot of the SELinux kernel before we have
 		   assigned xattr values to the filesystem. */
-		if (!root_inode->i_op->getxattr) {
+		if (!(root_inode->i_opflags & IOP_XATTR)) {
 			printk(KERN_WARNING "SELinux: (dev %s, type %s) has no "
 			       "xattr support\n", sb->s_id, sb->s_type->name);
 			rc = -EOPNOTSUPP;
 			goto out;
 		}
-		rc = root_inode->i_op->getxattr(root, root_inode,
-						XATTR_NAME_SELINUX, NULL, 0);
+
+		rc = __vfs_getxattr(root, root_inode, XATTR_NAME_SELINUX, NULL, 0);
 		if (rc < 0 && rc != -ENODATA) {
 			if (rc == -EOPNOTSUPP)
 				printk(KERN_WARNING "SELinux: (dev %s, type "
@@ -1410,11 +1410,10 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
 	case SECURITY_FS_USE_NATIVE:
 		break;
 	case SECURITY_FS_USE_XATTR:
-		if (!inode->i_op->getxattr) {
+		if (!(inode->i_opflags & IOP_XATTR)) {
 			isec->sid = sbsec->def_sid;
 			break;
 		}
-
 		/* Need a dentry, since the xattr API requires one.
 		   Life would be simpler if we could just pass the inode. */
 		if (opt_dentry) {
@@ -1445,14 +1444,12 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
 			goto out_unlock;
 		}
 		context[len] = '\0';
-		rc = inode->i_op->getxattr(dentry, inode, XATTR_NAME_SELINUX,
-					   context, len);
+		rc = __vfs_getxattr(dentry, inode, XATTR_NAME_SELINUX, context, len);
 		if (rc == -ERANGE) {
 			kfree(context);
 
 			/* Need a larger buffer.  Query for the right size. */
-			rc = inode->i_op->getxattr(dentry, inode, XATTR_NAME_SELINUX,
-						   NULL, 0);
+			rc = __vfs_getxattr(dentry, inode, XATTR_NAME_SELINUX, NULL, 0);
 			if (rc < 0) {
 				dput(dentry);
 				goto out_unlock;
@@ -1465,9 +1462,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
 				goto out_unlock;
 			}
 			context[len] = '\0';
-			rc = inode->i_op->getxattr(dentry, inode,
-						   XATTR_NAME_SELINUX,
-						   context, len);
+			rc = __vfs_getxattr(dentry, inode, XATTR_NAME_SELINUX, context, len);
 		}
 		dput(dentry);
 		if (rc < 0) {
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 87a9741..516b3f5 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -265,14 +265,14 @@ static struct smack_known *smk_fetch(const char *name, struct inode *ip,
 	char *buffer;
 	struct smack_known *skp = NULL;
 
-	if (ip->i_op->getxattr == NULL)
+	if (!(ip->i_opflags & IOP_XATTR))
 		return ERR_PTR(-EOPNOTSUPP);
 
 	buffer = kzalloc(SMK_LONGLABEL, GFP_KERNEL);
 	if (buffer == NULL)
 		return ERR_PTR(-ENOMEM);
 
-	rc = ip->i_op->getxattr(dp, ip, name, buffer, SMK_LONGLABEL);
+	rc = __vfs_getxattr(dp, ip, name, buffer, SMK_LONGLABEL);
 	if (rc < 0)
 		skp = ERR_PTR(rc);
 	else if (rc == 0)
@@ -3520,8 +3520,8 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
 		 * It would be curious if the label of the task
 		 * does not match that assigned.
 		 */
-		if (inode->i_op->getxattr == NULL)
-			break;
+		if (!(inode->i_opflags & IOP_XATTR))
+		        break;
 		/*
 		 * Get the dentry for xattr.
 		 */
@@ -3545,12 +3545,12 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
 			 */
 			if (isp->smk_flags & SMK_INODE_CHANGED) {
 				isp->smk_flags &= ~SMK_INODE_CHANGED;
-				rc = inode->i_op->setxattr(dp, inode,
+				rc = __vfs_setxattr(dp, inode,
 					XATTR_NAME_SMACKTRANSMUTE,
 					TRANS_TRUE, TRANS_TRUE_SIZE,
 					0);
 			} else {
-				rc = inode->i_op->getxattr(dp, inode,
+				rc = __vfs_getxattr(dp, inode,
 					XATTR_NAME_SMACKTRANSMUTE, trattr,
 					TRANS_TRUE_SIZE);
 				if (rc >= 0 && strncmp(trattr, TRANS_TRUE,
-- 
2.7.4

[PATCH v4 18/20] vfs: Check for the IOP_XATTR flag in listxattr

[Andreas Gruenbacher]

When an inode doesn't support xattrs, turn listxattr off as well.

(When xattrs are "turned off", the VFS still passes security xattr
operations through to security modules, which can still expose inode
security labels that way.)

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/xattr.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/fs/xattr.c b/fs/xattr.c
index 54a4115..e1ccf2b 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -326,18 +326,19 @@ nolsm:
 EXPORT_SYMBOL_GPL(vfs_getxattr);
 
 ssize_t
-vfs_listxattr(struct dentry *d, char *list, size_t size)
+vfs_listxattr(struct dentry *dentry, char *list, size_t size)
 {
+	struct inode *inode = d_inode(dentry);
 	ssize_t error;
 
-	error = security_inode_listxattr(d);
+	error = security_inode_listxattr(dentry);
 	if (error)
 		return error;
-	error = -EOPNOTSUPP;
-	if (d->d_inode->i_op->listxattr) {
-		error = d->d_inode->i_op->listxattr(d, list, size);
+	if (inode->i_op->listxattr && (inode->i_opflags & IOP_XATTR)) {
+		error = -EOPNOTSUPP;
+		error = inode->i_op->listxattr(dentry, list, size);
 	} else {
-		error = security_inode_listsecurity(d->d_inode, list, size);
+		error = security_inode_listsecurity(inode, list, size);
 		if (size && error > size)
 			error = -ERANGE;
 	}
-- 
2.7.4

[PATCH v4 19/20] xattr: Stop calling {get,set,remove}xattr inode operations

[Andreas Gruenbacher]

All filesystems that support xattrs by now do so via xattr handlers.
They all define sb->s_xattr, and their getxattr, setxattr, and
removexattr inode operations use the generic inode operations.  On
filesystems that don't support xattrs, the xattr inode operations are
all NULL, and sb->s_xattr is also NULL.

This means that we can remove the getxattr, setxattr, and removexattr
inode operations and directly call the generic handlers, or better,
inline expand those handlers into fs/xattr.c.

Filesystems that do not support xattrs on some inodes should clear the
IOP_XATTR i_opflags flag in those inodes.  (Right now, some filesystems
have checks to disable xattrs on some inodes in the ->list, ->get, and
->set xattr handler operations instead.)  The IOP_XATTR flag is
automatically cleared in inodes of filesystems that don't have xattr
support.

In squashfs and sockfs, add ->set xattr handler operations so that the
VFS can call ->set without a NULL check.

In orangefs, symlinks do have a setxattr iop but no getxattr iop.  Add a
check for symlinks to orangefs_inode_getxattr to preserve the current,
weird behavior; that check may not be necessary though.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 Documentation/filesystems/Locking | 24 +++++++++++++-----
 Documentation/filesystems/vfs.txt | 45 ++++++++++++++++++++++-----------
 fs/orangefs/xattr.c               |  3 +++
 fs/squashfs/xattr.c               | 19 +++++++++++---
 fs/xattr.c                        | 52 +++++++++++++++++++++++++--------------
 net/socket.c                      |  9 +++++++
 6 files changed, 110 insertions(+), 42 deletions(-)

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index d30fb2c..b9a98eb 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -61,10 +61,7 @@ prototypes:
 	int (*get_acl)(struct inode *, int);
 	int (*setattr) (struct dentry *, struct iattr *);
 	int (*getattr) (struct vfsmount *, struct dentry *, struct kstat *);
-	int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
-	ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
-	int (*removexattr) (struct dentry *, const char *);
 	int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
 	void (*update_time)(struct inode *, struct timespec *, int);
 	int (*atomic_open)(struct inode *, struct dentry *,
@@ -91,15 +88,13 @@ setattr:	yes
 permission:	no (may not block if called in rcu-walk mode)
 get_acl:	no
 getattr:	no
-setxattr:	yes
-getxattr:	no
 listxattr:	no
-removexattr:	yes
 fiemap:		no
 update_time:	no
 atomic_open:	yes
 tmpfile:	no
 
+
 	Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
 victim.
 	cross-directory ->rename() and rename2() has (per-superblock)
@@ -108,6 +103,23 @@ victim.
 See Documentation/filesystems/directory-locking for more detailed discussion
 of the locking scheme for directory operations.
 
+----------------------- xattr_handler operations -----------------------
+protoypes:
+	bool (*list)(struct dentry *dentry);
+	int (*get)(const struct xattr_handler *handler, struct dentry *dentry,
+		   struct inode *inode, const char *name, void *buffer,
+		   size_t size);
+	int (*set)(const struct xattr_handler *handler, struct dentry *dentry,
+		   struct inode *inode, const char *name, const void *buffer,
+		   size_t size, int flags);
+
+locking rules:
+	all may block
+		i_mutex(inode)
+list:		no
+get:		no
+set:		yes
+
 --------------------------- super_operations ---------------------------
 prototypes:
 	struct inode *(*alloc_inode)(struct super_block *sb);
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 9ace359..2c9b29e 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -323,6 +323,35 @@ Whoever sets up the inode is responsible for filling in the "i_op" field. This
 is a pointer to a "struct inode_operations" which describes the methods that
 can be performed on individual inodes.
 
+struct xattr_handlers
+---------------------
+
+On filesystems that support extended attributes (xattrs), the s_xattr
+superblock field points to a NULL-terminated array of xattr handlers.  Extended
+attributes are name:value pairs.
+
+  name: Indicates that the handler matches attributes with the specified name
+	(such as "system.posix_acl_access"); the prefix field must be NULL.
+
+  prefix: Indicates that the handler matches all attributes with the specified
+	name prefix (such as "user."); the name field must be NULL.
+
+  list: Determine if attributes matching this xattr handler should be listed
+	for a particular dentry.  Used by some listxattr implementations like
+	generic_listxattr.
+
+  get: Called by the VFS to get the value of a particular extended attribute.
+	This method is called by the getxattr(2) system call.
+
+  set: Called by the VFS to set the value of a particular extended attribute.
+	When the new value is NULL, called to remove a particular extended
+	attribute.  This method is called by the the setxattr(2) and
+	removexattr(2) system calls.
+
+When none of the xattr handlers of a filesystem match the specified attribute
+name or when a filesystem doesn't support extended attributes, the various
+*xattr(2) system calls return -EOPNOTSUPP.
+
 
 The Inode Object
 ================
@@ -356,10 +385,7 @@ struct inode_operations {
 	int (*get_acl)(struct inode *, int);
 	int (*setattr) (struct dentry *, struct iattr *);
 	int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
-	int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
-	ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
-	int (*removexattr) (struct dentry *, const char *);
 	void (*update_time)(struct inode *, struct timespec *, int);
 	int (*atomic_open)(struct inode *, struct dentry *, struct file *,
 			unsigned open_flag, umode_t create_mode, int *opened);
@@ -463,19 +489,8 @@ otherwise noted.
   getattr: called by the VFS to get attributes of a file. This method
   	is called by stat(2) and related system calls.
 
-  setxattr: called by the VFS to set an extended attribute for a file.
-  	Extended attribute is a name:value pair associated with an
-  	inode. This method is called by setxattr(2) system call.
-
-  getxattr: called by the VFS to retrieve the value of an extended
-  	attribute name. This method is called by getxattr(2) function
-  	call.
-
   listxattr: called by the VFS to list all extended attributes for a
-  	given file. This method is called by listxattr(2) system call.
-
-  removexattr: called by the VFS to remove an extended attribute from
-  	a file. This method is called by removexattr(2) system call.
+	given file. This method is called by the listxattr(2) system call.
 
   update_time: called by the VFS to update a specific time or the i_version of
   	an inode.  If this is not defined the VFS will update the inode itself
diff --git a/fs/orangefs/xattr.c b/fs/orangefs/xattr.c
index 2a9f07f..74a81b1 100644
--- a/fs/orangefs/xattr.c
+++ b/fs/orangefs/xattr.c
@@ -73,6 +73,9 @@ ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
 		     "%s: name %s, buffer_size %zd\n",
 		     __func__, name, size);
 
+	if (S_ISLNK(inode->i_mode))
+		return -EOPNOTSUPP;
+
 	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN) {
 		gossip_err("Invalid key length (%d)\n",
 			   (int)strlen(name));
diff --git a/fs/squashfs/xattr.c b/fs/squashfs/xattr.c
index 1548b37..4c9b83e 100644
--- a/fs/squashfs/xattr.c
+++ b/fs/squashfs/xattr.c
@@ -223,13 +223,24 @@ static int squashfs_xattr_handler_get(const struct xattr_handler *handler,
 		buffer, size);
 }
 
+static int squashfs_xattr_handler_set(const struct xattr_handler *handler,
+				      struct dentry *unused,
+				      struct inode *inode,
+				      const char *name,
+				      const void *buffer, size_t size,
+				      int flags)
+{
+	return -EOPNOTSUPP;
+}
+
 /*
  * User namespace support
  */
 static const struct xattr_handler squashfs_xattr_user_handler = {
 	.prefix	= XATTR_USER_PREFIX,
 	.flags	= SQUASHFS_XATTR_USER,
-	.get	= squashfs_xattr_handler_get
+	.get	= squashfs_xattr_handler_get,
+	.set	= squashfs_xattr_handler_set,
 };
 
 /*
@@ -244,7 +255,8 @@ static const struct xattr_handler squashfs_xattr_trusted_handler = {
 	.prefix	= XATTR_TRUSTED_PREFIX,
 	.flags	= SQUASHFS_XATTR_TRUSTED,
 	.list	= squashfs_trusted_xattr_handler_list,
-	.get	= squashfs_xattr_handler_get
+	.get	= squashfs_xattr_handler_get,
+	.set	= squashfs_xattr_handler_set,
 };
 
 /*
@@ -253,7 +265,8 @@ static const struct xattr_handler squashfs_xattr_trusted_handler = {
 static const struct xattr_handler squashfs_xattr_security_handler = {
 	.prefix	= XATTR_SECURITY_PREFIX,
 	.flags	= SQUASHFS_XATTR_SECURITY,
-	.get	= squashfs_xattr_handler_get
+	.get	= squashfs_xattr_handler_get,
+	.set	= squashfs_xattr_handler_set,
 };
 
 static const struct xattr_handler *squashfs_xattr_handler(int type)
diff --git a/fs/xattr.c b/fs/xattr.c
index e1ccf2b..2432442 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -36,12 +36,9 @@ strcmp_prefix(const char *a, const char *a_prefix)
 
 /*
  * In order to implement different sets of xattr operations for each xattr
- * prefix with the generic xattr API, a filesystem should create a
- * null-terminated array of struct xattr_handler (one for each prefix) and
- * hang a pointer to it off of the s_xattr field of the superblock.
- *
- * The generic_fooxattr() functions will use this list to dispatch xattr
- * operations to the correct xattr_handler.
+ * prefix, a filesystem should create a null-terminated array of struct
+ * xattr_handler (one for each prefix) and hang a pointer to it off of the
+ * s_xattr field of the superblock.
  */
 #define for_each_xattr_handler(handlers, handler)		\
 	if (handlers)						\
@@ -140,9 +137,16 @@ int
 __vfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
 	       const void *value, size_t size, int flags)
 {
-	if (!inode->i_op->setxattr)
+	const struct xattr_handler *handler;
+
+	handler = xattr_resolve_name(inode, &name);
+	if (IS_ERR(handler))
+		return PTR_ERR(handler);
+	if (!handler->set)
 		return -EOPNOTSUPP;
-	return inode->i_op->setxattr(dentry, inode, name, value, size, flags);
+	if (size == 0)
+		value = "";  /* empty EA, do not remove */
+	return handler->set(handler, dentry, inode, name, value, size, flags);
 }
 EXPORT_SYMBOL(__vfs_setxattr);
 
@@ -172,7 +176,7 @@ int __vfs_setxattr_noperm(struct dentry *dentry, const char *name,
 
 	if (issec)
 		inode->i_flags &= ~S_NOSEC;
-	if (inode->i_op->setxattr) {
+	if (inode->i_opflags & IOP_XATTR) {
 		error = __vfs_setxattr(dentry, inode, name, value, size, flags);
 		if (!error) {
 			fsnotify_xattr(dentry);
@@ -257,6 +261,7 @@ ssize_t
 vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value,
 		   size_t xattr_size, gfp_t flags)
 {
+	const struct xattr_handler *handler;
 	struct inode *inode = dentry->d_inode;
 	char *value = *xattr_value;
 	int error;
@@ -265,10 +270,12 @@ vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value,
 	if (error)
 		return error;
 
-	if (!inode->i_op->getxattr)
+	handler = xattr_resolve_name(inode, &name);
+	if (IS_ERR(handler))
+		return PTR_ERR(handler);
+	if (!handler->get)
 		return -EOPNOTSUPP;
-
-	error = inode->i_op->getxattr(dentry, inode, name, NULL, 0);
+	error = handler->get(handler, dentry, inode, name, NULL, 0);
 	if (error < 0)
 		return error;
 
@@ -279,7 +286,7 @@ vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value,
 		memset(value, 0, error + 1);
 	}
 
-	error = inode->i_op->getxattr(dentry, inode, name, value, error);
+	error = handler->get(handler, dentry, inode, name, value, error);
 	*xattr_value = value;
 	return error;
 }
@@ -288,9 +295,14 @@ ssize_t
 __vfs_getxattr(struct dentry *dentry, struct inode *inode, const char *name,
 	       void *value, size_t size)
 {
-	if (!inode->i_op->getxattr)
+	const struct xattr_handler *handler;
+
+	handler = xattr_resolve_name(inode, &name);
+	if (IS_ERR(handler))
+		return PTR_ERR(handler);
+	if (!handler->get)
 		return -EOPNOTSUPP;
-	return inode->i_op->getxattr(dentry, inode, name, value, size);
+	return handler->get(handler, dentry, inode, name, value, size);
 }
 EXPORT_SYMBOL(__vfs_getxattr);
 
@@ -349,11 +361,15 @@ EXPORT_SYMBOL_GPL(vfs_listxattr);
 int
 __vfs_removexattr(struct dentry *dentry, const char *name)
 {
-	struct inode *inode = dentry->d_inode;
+	struct inode *inode = d_inode(dentry);
+	const struct xattr_handler *handler;
 
-	if (!inode->i_op->removexattr)
+	handler = xattr_resolve_name(inode, &name);
+	if (IS_ERR(handler))
+		return PTR_ERR(handler);
+	if (!handler->set)
 		return -EOPNOTSUPP;
-	return inode->i_op->removexattr(dentry, name);
+	return handler->set(handler, dentry, inode, name, NULL, 0, XATTR_REPLACE);
 }
 EXPORT_SYMBOL(__vfs_removexattr);
 
diff --git a/net/socket.c b/net/socket.c
index 976f7324..e54d871 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -332,6 +332,14 @@ static int sockfs_xattr_get(const struct xattr_handler *handler,
 	return dentry->d_name.len + 1;
 }
 
+static int sockfs_xattr_set(const struct xattr_handler *handler,
+			    struct dentry *dentry, struct inode *inode,
+			    const char *suffix, const void *value, size_t size,
+			    int flags)
+{
+	return -EOPNOTSUPP;
+}
+
 #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname"
 #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX)
 #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1)
@@ -339,6 +347,7 @@ static int sockfs_xattr_get(const struct xattr_handler *handler,
 static const struct xattr_handler sockfs_xattr_handler = {
 	.name = XATTR_NAME_SOCKPROTONAME,
 	.get = sockfs_xattr_get,
+	.set = sockfs_xattr_set,
 };
 
 static const struct xattr_handler *sockfs_xattr_handlers[] = {
-- 
2.7.4

[PATCH v4 20/20] vfs: Remove {get,set,remove}xattr inode operations

[Andreas Gruenbacher]

These inode operations are no longer used; remove them.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/9p/vfs_inode_dotl.c |  9 ---------
 fs/btrfs/inode.c       | 12 ------------
 fs/ceph/dir.c          |  3 ---
 fs/ceph/inode.c        |  6 ------
 fs/cifs/cifsfs.c       |  9 ---------
 fs/ecryptfs/inode.c    |  9 ---------
 fs/ext2/file.c         |  3 ---
 fs/ext2/namei.c        |  6 ------
 fs/ext2/symlink.c      |  6 ------
 fs/ext4/file.c         |  3 ---
 fs/ext4/namei.c        |  6 ------
 fs/ext4/symlink.c      |  9 ---------
 fs/f2fs/file.c         |  3 ---
 fs/f2fs/namei.c        | 12 ------------
 fs/fuse/dir.c          |  9 ---------
 fs/gfs2/inode.c        |  9 ---------
 fs/hfs/inode.c         |  2 --
 fs/hfsplus/dir.c       |  3 ---
 fs/hfsplus/inode.c     |  3 ---
 fs/jffs2/dir.c         |  3 ---
 fs/jffs2/file.c        |  3 ---
 fs/jffs2/symlink.c     |  3 ---
 fs/jfs/file.c          |  3 ---
 fs/jfs/namei.c         |  3 ---
 fs/jfs/symlink.c       |  6 ------
 fs/kernfs/dir.c        |  3 ---
 fs/kernfs/inode.c      |  3 ---
 fs/kernfs/symlink.c    |  3 ---
 fs/nfs/nfs3proc.c      |  6 ------
 fs/nfs/nfs4proc.c      |  6 ------
 fs/ocfs2/file.c        |  3 ---
 fs/ocfs2/namei.c       |  3 ---
 fs/ocfs2/symlink.c     |  3 ---
 fs/orangefs/inode.c    |  3 ---
 fs/orangefs/namei.c    |  3 ---
 fs/orangefs/symlink.c  |  1 -
 fs/overlayfs/dir.c     |  3 ---
 fs/overlayfs/inode.c   |  6 ------
 fs/reiserfs/file.c     |  3 ---
 fs/reiserfs/namei.c    |  9 ---------
 fs/squashfs/inode.c    |  1 -
 fs/squashfs/namei.c    |  1 -
 fs/squashfs/symlink.c  |  1 -
 fs/squashfs/xattr.h    |  1 -
 fs/ubifs/dir.c         |  3 ---
 fs/ubifs/file.c        |  6 ------
 fs/xattr.c             | 53 --------------------------------------------------
 fs/xfs/xfs_iops.c      | 15 --------------
 include/linux/fs.h     |  5 -----
 include/linux/xattr.h  |  4 ----
 mm/shmem.c             | 15 --------------
 net/socket.c           |  1 -
 52 files changed, 307 deletions(-)

diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index eeabcb0..d8220ef 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -967,9 +967,6 @@ const struct inode_operations v9fs_dir_inode_operations_dotl = {
 	.rename = v9fs_vfs_rename,
 	.getattr = v9fs_vfs_getattr_dotl,
 	.setattr = v9fs_vfs_setattr_dotl,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
-	.removexattr = generic_removexattr,
 	.listxattr = v9fs_listxattr,
 	.get_acl = v9fs_iop_get_acl,
 };
@@ -977,9 +974,6 @@ const struct inode_operations v9fs_dir_inode_operations_dotl = {
 const struct inode_operations v9fs_file_inode_operations_dotl = {
 	.getattr = v9fs_vfs_getattr_dotl,
 	.setattr = v9fs_vfs_setattr_dotl,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
-	.removexattr = generic_removexattr,
 	.listxattr = v9fs_listxattr,
 	.get_acl = v9fs_iop_get_acl,
 };
@@ -989,8 +983,5 @@ const struct inode_operations v9fs_symlink_inode_operations_dotl = {
 	.get_link = v9fs_vfs_get_link_dotl,
 	.getattr = v9fs_vfs_getattr_dotl,
 	.setattr = v9fs_vfs_setattr_dotl,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
-	.removexattr = generic_removexattr,
 	.listxattr = v9fs_listxattr,
 };
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 08dfc57..99773e9 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -10553,10 +10553,7 @@ static const struct inode_operations btrfs_dir_inode_operations = {
 	.symlink	= btrfs_symlink,
 	.setattr	= btrfs_setattr,
 	.mknod		= btrfs_mknod,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= btrfs_listxattr,
-	.removexattr	= generic_removexattr,
 	.permission	= btrfs_permission,
 	.get_acl	= btrfs_get_acl,
 	.set_acl	= btrfs_set_acl,
@@ -10630,10 +10627,7 @@ static const struct address_space_operations btrfs_symlink_aops = {
 static const struct inode_operations btrfs_file_inode_operations = {
 	.getattr	= btrfs_getattr,
 	.setattr	= btrfs_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr      = btrfs_listxattr,
-	.removexattr	= generic_removexattr,
 	.permission	= btrfs_permission,
 	.fiemap		= btrfs_fiemap,
 	.get_acl	= btrfs_get_acl,
@@ -10644,10 +10638,7 @@ static const struct inode_operations btrfs_special_inode_operations = {
 	.getattr	= btrfs_getattr,
 	.setattr	= btrfs_setattr,
 	.permission	= btrfs_permission,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= btrfs_listxattr,
-	.removexattr	= generic_removexattr,
 	.get_acl	= btrfs_get_acl,
 	.set_acl	= btrfs_set_acl,
 	.update_time	= btrfs_update_time,
@@ -10658,10 +10649,7 @@ static const struct inode_operations btrfs_symlink_inode_operations = {
 	.getattr	= btrfs_getattr,
 	.setattr	= btrfs_setattr,
 	.permission	= btrfs_permission,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= btrfs_listxattr,
-	.removexattr	= generic_removexattr,
 	.update_time	= btrfs_update_time,
 };
 
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index c64a0b7..ad0fe7b 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1486,10 +1486,7 @@ const struct inode_operations ceph_dir_iops = {
 	.permission = ceph_permission,
 	.getattr = ceph_getattr,
 	.setattr = ceph_setattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = ceph_listxattr,
-	.removexattr = generic_removexattr,
 	.get_acl = ceph_get_acl,
 	.set_acl = ceph_set_acl,
 	.mknod = ceph_mknod,
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index dd3a6db..e70b4f5 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -94,10 +94,7 @@ const struct inode_operations ceph_file_iops = {
 	.permission = ceph_permission,
 	.setattr = ceph_setattr,
 	.getattr = ceph_getattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = ceph_listxattr,
-	.removexattr = generic_removexattr,
 	.get_acl = ceph_get_acl,
 	.set_acl = ceph_set_acl,
 };
@@ -1885,10 +1882,7 @@ static const struct inode_operations ceph_symlink_iops = {
 	.get_link = simple_get_link,
 	.setattr = ceph_setattr,
 	.getattr = ceph_getattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = ceph_listxattr,
-	.removexattr = generic_removexattr,
 };
 
 int __ceph_setattr(struct inode *inode, struct iattr *attr)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 6bbec5e..b64b3bd 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -906,30 +906,21 @@ const struct inode_operations cifs_dir_inode_ops = {
 	.setattr = cifs_setattr,
 	.symlink = cifs_symlink,
 	.mknod   = cifs_mknod,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = cifs_listxattr,
-	.removexattr = generic_removexattr,
 };
 
 const struct inode_operations cifs_file_inode_ops = {
 	.setattr = cifs_setattr,
 	.getattr = cifs_getattr,
 	.permission = cifs_permission,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = cifs_listxattr,
-	.removexattr = generic_removexattr,
 };
 
 const struct inode_operations cifs_symlink_inode_ops = {
 	.readlink = generic_readlink,
 	.get_link = cifs_get_link,
 	.permission = cifs_permission,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = cifs_listxattr,
-	.removexattr = generic_removexattr,
 };
 
 static int cifs_clone_file_range(struct file *src_file, loff_t off,
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 32fee25..3f2575d 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1090,10 +1090,7 @@ const struct inode_operations ecryptfs_symlink_iops = {
 	.permission = ecryptfs_permission,
 	.setattr = ecryptfs_setattr,
 	.getattr = ecryptfs_getattr_link,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = ecryptfs_listxattr,
-	.removexattr = generic_removexattr
 };
 
 const struct inode_operations ecryptfs_dir_iops = {
@@ -1108,20 +1105,14 @@ const struct inode_operations ecryptfs_dir_iops = {
 	.rename = ecryptfs_rename,
 	.permission = ecryptfs_permission,
 	.setattr = ecryptfs_setattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = ecryptfs_listxattr,
-	.removexattr = generic_removexattr
 };
 
 const struct inode_operations ecryptfs_main_iops = {
 	.permission = ecryptfs_permission,
 	.setattr = ecryptfs_setattr,
 	.getattr = ecryptfs_getattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = ecryptfs_listxattr,
-	.removexattr = generic_removexattr
 };
 
 static int ecryptfs_xattr_get(const struct xattr_handler *handler,
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 5efeefe..538f776 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -178,10 +178,7 @@ const struct file_operations ext2_file_operations = {
 
 const struct inode_operations ext2_file_inode_operations = {
 #ifdef CONFIG_EXT2_FS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext2_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 	.setattr	= ext2_setattr,
 	.get_acl	= ext2_get_acl,
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index d446203..ff32ea7 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -428,10 +428,7 @@ const struct inode_operations ext2_dir_inode_operations = {
 	.mknod		= ext2_mknod,
 	.rename		= ext2_rename,
 #ifdef CONFIG_EXT2_FS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext2_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 	.setattr	= ext2_setattr,
 	.get_acl	= ext2_get_acl,
@@ -441,10 +438,7 @@ const struct inode_operations ext2_dir_inode_operations = {
 
 const struct inode_operations ext2_special_inode_operations = {
 #ifdef CONFIG_EXT2_FS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext2_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 	.setattr	= ext2_setattr,
 	.get_acl	= ext2_get_acl,
diff --git a/fs/ext2/symlink.c b/fs/ext2/symlink.c
index 3495d8a..8437b19 100644
--- a/fs/ext2/symlink.c
+++ b/fs/ext2/symlink.c
@@ -25,10 +25,7 @@ const struct inode_operations ext2_symlink_inode_operations = {
 	.get_link	= page_get_link,
 	.setattr	= ext2_setattr,
 #ifdef CONFIG_EXT2_FS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext2_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 };
  
@@ -37,9 +34,6 @@ const struct inode_operations ext2_fast_symlink_inode_operations = {
 	.get_link	= simple_get_link,
 	.setattr	= ext2_setattr,
 #ifdef CONFIG_EXT2_FS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext2_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 };
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 261ac37..93072db 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -711,10 +711,7 @@ const struct file_operations ext4_file_operations = {
 const struct inode_operations ext4_file_inode_operations = {
 	.setattr	= ext4_setattr,
 	.getattr	= ext4_getattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
-	.removexattr	= generic_removexattr,
 	.get_acl	= ext4_get_acl,
 	.set_acl	= ext4_set_acl,
 	.fiemap		= ext4_fiemap,
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 34c0142..ddc309e 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -3882,10 +3882,7 @@ const struct inode_operations ext4_dir_inode_operations = {
 	.tmpfile	= ext4_tmpfile,
 	.rename2	= ext4_rename2,
 	.setattr	= ext4_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
-	.removexattr	= generic_removexattr,
 	.get_acl	= ext4_get_acl,
 	.set_acl	= ext4_set_acl,
 	.fiemap         = ext4_fiemap,
@@ -3893,10 +3890,7 @@ const struct inode_operations ext4_dir_inode_operations = {
 
 const struct inode_operations ext4_special_inode_operations = {
 	.setattr	= ext4_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
-	.removexattr	= generic_removexattr,
 	.get_acl	= ext4_get_acl,
 	.set_acl	= ext4_set_acl,
 };
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index 4d83d9e..128ea78 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -90,28 +90,19 @@ const struct inode_operations ext4_encrypted_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.get_link	= ext4_encrypted_get_link,
 	.setattr	= ext4_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
-	.removexattr	= generic_removexattr,
 };
 
 const struct inode_operations ext4_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.get_link	= page_get_link,
 	.setattr	= ext4_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
-	.removexattr	= generic_removexattr,
 };
 
 const struct inode_operations ext4_fast_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.get_link	= simple_get_link,
 	.setattr	= ext4_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ext4_listxattr,
-	.removexattr	= generic_removexattr,
 };
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0e493f6..34b3ae1 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -732,10 +732,7 @@ const struct inode_operations f2fs_file_inode_operations = {
 	.get_acl	= f2fs_get_acl,
 	.set_acl	= f2fs_set_acl,
 #ifdef CONFIG_F2FS_FS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= f2fs_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 	.fiemap		= f2fs_fiemap,
 };
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 73fa356..1c481c9 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -1077,10 +1077,7 @@ const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
 	.getattr	= f2fs_getattr,
 	.setattr	= f2fs_setattr,
 #ifdef CONFIG_F2FS_FS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= f2fs_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 };
 
@@ -1100,10 +1097,7 @@ const struct inode_operations f2fs_dir_inode_operations = {
 	.get_acl	= f2fs_get_acl,
 	.set_acl	= f2fs_set_acl,
 #ifdef CONFIG_F2FS_FS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= f2fs_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 };
 
@@ -1113,10 +1107,7 @@ const struct inode_operations f2fs_symlink_inode_operations = {
 	.getattr	= f2fs_getattr,
 	.setattr	= f2fs_setattr,
 #ifdef CONFIG_F2FS_FS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= f2fs_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 };
 
@@ -1126,9 +1117,6 @@ const struct inode_operations f2fs_special_inode_operations = {
 	.get_acl	= f2fs_get_acl,
 	.set_acl	= f2fs_set_acl,
 #ifdef CONFIG_F2FS_FS_XATTR
-	.setxattr       = generic_setxattr,
-	.getxattr       = generic_getxattr,
 	.listxattr	= f2fs_listxattr,
-	.removexattr    = generic_removexattr,
 #endif
 };
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 3408a37..96ba565 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1883,10 +1883,7 @@ static const struct inode_operations fuse_dir_inode_operations = {
 	.mknod		= fuse_mknod,
 	.permission	= fuse_permission,
 	.getattr	= fuse_getattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= fuse_listxattr,
-	.removexattr	= generic_removexattr,
 };
 
 static const struct file_operations fuse_dir_operations = {
@@ -1904,10 +1901,7 @@ static const struct inode_operations fuse_common_inode_operations = {
 	.setattr	= fuse_setattr,
 	.permission	= fuse_permission,
 	.getattr	= fuse_getattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= fuse_listxattr,
-	.removexattr	= generic_removexattr,
 };
 
 static const struct inode_operations fuse_symlink_inode_operations = {
@@ -1915,10 +1909,7 @@ static const struct inode_operations fuse_symlink_inode_operations = {
 	.get_link	= fuse_get_link,
 	.readlink	= generic_readlink,
 	.getattr	= fuse_getattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= fuse_listxattr,
-	.removexattr	= generic_removexattr,
 };
 
 void fuse_init_common(struct inode *inode)
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index e4da0ec..9cbd4b6 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -2036,10 +2036,7 @@ const struct inode_operations gfs2_file_iops = {
 	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = gfs2_listxattr,
-	.removexattr = generic_removexattr,
 	.fiemap = gfs2_fiemap,
 	.get_acl = gfs2_get_acl,
 	.set_acl = gfs2_set_acl,
@@ -2058,10 +2055,7 @@ const struct inode_operations gfs2_dir_iops = {
 	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = gfs2_listxattr,
-	.removexattr = generic_removexattr,
 	.fiemap = gfs2_fiemap,
 	.get_acl = gfs2_get_acl,
 	.set_acl = gfs2_set_acl,
@@ -2074,10 +2068,7 @@ const struct inode_operations gfs2_symlink_iops = {
 	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = gfs2_listxattr,
-	.removexattr = generic_removexattr,
 	.fiemap = gfs2_fiemap,
 };
 
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 7f44f1a..a181bd7 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -688,7 +688,5 @@ static const struct file_operations hfs_file_operations = {
 static const struct inode_operations hfs_file_inode_operations = {
 	.lookup		= hfs_file_lookup,
 	.setattr	= hfs_inode_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= generic_listxattr,
 };
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 42e1286..9cbe430 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -562,10 +562,7 @@ const struct inode_operations hfsplus_dir_inode_operations = {
 	.symlink		= hfsplus_symlink,
 	.mknod			= hfsplus_mknod,
 	.rename			= hfsplus_rename,
-	.setxattr		= generic_setxattr,
-	.getxattr		= generic_getxattr,
 	.listxattr		= hfsplus_listxattr,
-	.removexattr		= generic_removexattr,
 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
 	.get_acl		= hfsplus_get_posix_acl,
 	.set_acl		= hfsplus_set_posix_acl,
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 19462d7..4a7c924 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -333,10 +333,7 @@ int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 
 static const struct inode_operations hfsplus_file_inode_operations = {
 	.setattr	= hfsplus_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= hfsplus_listxattr,
-	.removexattr	= generic_removexattr,
 #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
 	.get_acl	= hfsplus_get_posix_acl,
 	.set_acl	= hfsplus_set_posix_acl,
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 8aa2f89..9b24243 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -61,10 +61,7 @@ const struct inode_operations jffs2_dir_inode_operations =
 	.get_acl =	jffs2_get_acl,
 	.set_acl =	jffs2_set_acl,
 	.setattr =	jffs2_setattr,
-	.setxattr =	generic_setxattr,
-	.getxattr =	generic_getxattr,
 	.listxattr =	jffs2_listxattr,
-	.removexattr =	generic_removexattr
 };
 
 /***********************************************************************/
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index fdf9e1c..c12476e 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -66,10 +66,7 @@ const struct inode_operations jffs2_file_inode_operations =
 	.get_acl =	jffs2_get_acl,
 	.set_acl =	jffs2_set_acl,
 	.setattr =	jffs2_setattr,
-	.setxattr =	generic_setxattr,
-	.getxattr =	generic_getxattr,
 	.listxattr =	jffs2_listxattr,
-	.removexattr =	generic_removexattr
 };
 
 const struct address_space_operations jffs2_file_address_operations =
diff --git a/fs/jffs2/symlink.c b/fs/jffs2/symlink.c
index afe2d75..8f3f085 100644
--- a/fs/jffs2/symlink.c
+++ b/fs/jffs2/symlink.c
@@ -16,8 +16,5 @@ const struct inode_operations jffs2_symlink_inode_operations =
 	.readlink =	generic_readlink,
 	.get_link =	simple_get_link,
 	.setattr =	jffs2_setattr,
-	.setxattr =	generic_setxattr,
-	.getxattr =	generic_getxattr,
 	.listxattr =	jffs2_listxattr,
-	.removexattr =	generic_removexattr
 };
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 7f1a585..f6eb041 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -140,10 +140,7 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
 }
 
 const struct inode_operations jfs_file_inode_operations = {
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= jfs_listxattr,
-	.removexattr	= generic_removexattr,
 	.setattr	= jfs_setattr,
 #ifdef CONFIG_JFS_POSIX_ACL
 	.get_acl	= jfs_get_acl,
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 814b0c5..e420c60 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1537,10 +1537,7 @@ const struct inode_operations jfs_dir_inode_operations = {
 	.rmdir		= jfs_rmdir,
 	.mknod		= jfs_mknod,
 	.rename		= jfs_rename,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= jfs_listxattr,
-	.removexattr	= generic_removexattr,
 	.setattr	= jfs_setattr,
 #ifdef CONFIG_JFS_POSIX_ACL
 	.get_acl	= jfs_get_acl,
diff --git a/fs/jfs/symlink.c b/fs/jfs/symlink.c
index c94c7e4..c82404f 100644
--- a/fs/jfs/symlink.c
+++ b/fs/jfs/symlink.c
@@ -25,19 +25,13 @@ const struct inode_operations jfs_fast_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.get_link	= simple_get_link,
 	.setattr	= jfs_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= jfs_listxattr,
-	.removexattr	= generic_removexattr,
 };
 
 const struct inode_operations jfs_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.get_link	= page_get_link,
 	.setattr	= jfs_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= jfs_listxattr,
-	.removexattr	= generic_removexattr,
 };
 
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index a6e430a..2b23ad9 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -1126,9 +1126,6 @@ const struct inode_operations kernfs_dir_iops = {
 	.permission	= kernfs_iop_permission,
 	.setattr	= kernfs_iop_setattr,
 	.getattr	= kernfs_iop_getattr,
-	.setxattr	= generic_setxattr,
-	.removexattr	= generic_removexattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= kernfs_iop_listxattr,
 
 	.mkdir		= kernfs_iop_mkdir,
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 6bc8754..2b735ce 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -28,9 +28,6 @@ static const struct inode_operations kernfs_iops = {
 	.permission	= kernfs_iop_permission,
 	.setattr	= kernfs_iop_setattr,
 	.getattr	= kernfs_iop_getattr,
-	.setxattr	= generic_setxattr,
-	.removexattr	= generic_removexattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= kernfs_iop_listxattr,
 };
 
diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c
index 549a14c7..9b43ca0 100644
--- a/fs/kernfs/symlink.c
+++ b/fs/kernfs/symlink.c
@@ -134,9 +134,6 @@ static const char *kernfs_iop_get_link(struct dentry *dentry,
 }
 
 const struct inode_operations kernfs_symlink_iops = {
-	.setxattr	= generic_setxattr,
-	.removexattr	= generic_removexattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= kernfs_iop_listxattr,
 	.readlink	= generic_readlink,
 	.get_link	= kernfs_iop_get_link,
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 698be93..dc925b5 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -899,9 +899,6 @@ static const struct inode_operations nfs3_dir_inode_operations = {
 	.setattr	= nfs_setattr,
 #ifdef CONFIG_NFS_V3_ACL
 	.listxattr	= nfs3_listxattr,
-	.getxattr	= generic_getxattr,
-	.setxattr	= generic_setxattr,
-	.removexattr	= generic_removexattr,
 	.get_acl	= nfs3_get_acl,
 	.set_acl	= nfs3_set_acl,
 #endif
@@ -913,9 +910,6 @@ static const struct inode_operations nfs3_file_inode_operations = {
 	.setattr	= nfs_setattr,
 #ifdef CONFIG_NFS_V3_ACL
 	.listxattr	= nfs3_listxattr,
-	.getxattr	= generic_getxattr,
-	.setxattr	= generic_setxattr,
-	.removexattr	= generic_removexattr,
 	.get_acl	= nfs3_get_acl,
 	.set_acl	= nfs3_set_acl,
 #endif
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1949bbd..321b760 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -8871,20 +8871,14 @@ static const struct inode_operations nfs4_dir_inode_operations = {
 	.permission	= nfs_permission,
 	.getattr	= nfs_getattr,
 	.setattr	= nfs_setattr,
-	.getxattr	= generic_getxattr,
-	.setxattr	= generic_setxattr,
 	.listxattr	= nfs4_listxattr,
-	.removexattr	= generic_removexattr,
 };
 
 static const struct inode_operations nfs4_file_inode_operations = {
 	.permission	= nfs_permission,
 	.getattr	= nfs_getattr,
 	.setattr	= nfs_setattr,
-	.getxattr	= generic_getxattr,
-	.setxattr	= generic_setxattr,
 	.listxattr	= nfs4_listxattr,
-	.removexattr	= generic_removexattr,
 };
 
 const struct nfs_rpc_ops nfs_v4_clientops = {
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 4e7b0dc..baf291b 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2460,10 +2460,7 @@ const struct inode_operations ocfs2_file_iops = {
 	.setattr	= ocfs2_setattr,
 	.getattr	= ocfs2_getattr,
 	.permission	= ocfs2_permission,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ocfs2_listxattr,
-	.removexattr	= generic_removexattr,
 	.fiemap		= ocfs2_fiemap,
 	.get_acl	= ocfs2_iop_get_acl,
 	.set_acl	= ocfs2_iop_set_acl,
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index a8f1225..6cc043e 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -2913,10 +2913,7 @@ const struct inode_operations ocfs2_dir_iops = {
 	.setattr	= ocfs2_setattr,
 	.getattr	= ocfs2_getattr,
 	.permission	= ocfs2_permission,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ocfs2_listxattr,
-	.removexattr	= generic_removexattr,
 	.fiemap         = ocfs2_fiemap,
 	.get_acl	= ocfs2_iop_get_acl,
 	.set_acl	= ocfs2_iop_set_acl,
diff --git a/fs/ocfs2/symlink.c b/fs/ocfs2/symlink.c
index 6c2a3e3..6ad8eec 100644
--- a/fs/ocfs2/symlink.c
+++ b/fs/ocfs2/symlink.c
@@ -91,9 +91,6 @@ const struct inode_operations ocfs2_symlink_inode_operations = {
 	.get_link	= page_get_link,
 	.getattr	= ocfs2_getattr,
 	.setattr	= ocfs2_setattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ocfs2_listxattr,
-	.removexattr	= generic_removexattr,
 	.fiemap		= ocfs2_fiemap,
 };
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
index 28a0557..a9407ee 100644
--- a/fs/orangefs/inode.c
+++ b/fs/orangefs/inode.c
@@ -296,10 +296,7 @@ const struct inode_operations orangefs_file_inode_operations = {
 	.set_acl = orangefs_set_acl,
 	.setattr = orangefs_setattr,
 	.getattr = orangefs_getattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = orangefs_listxattr,
-	.removexattr = generic_removexattr,
 	.permission = orangefs_permission,
 };
 
diff --git a/fs/orangefs/namei.c b/fs/orangefs/namei.c
index 62c5259..ccca518 100644
--- a/fs/orangefs/namei.c
+++ b/fs/orangefs/namei.c
@@ -462,9 +462,6 @@ const struct inode_operations orangefs_dir_inode_operations = {
 	.rename = orangefs_rename,
 	.setattr = orangefs_setattr,
 	.getattr = orangefs_getattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
-	.removexattr = generic_removexattr,
 	.listxattr = orangefs_listxattr,
 	.permission = orangefs_permission,
 };
diff --git a/fs/orangefs/symlink.c b/fs/orangefs/symlink.c
index 8fecf82..10b0b06 100644
--- a/fs/orangefs/symlink.c
+++ b/fs/orangefs/symlink.c
@@ -14,6 +14,5 @@ const struct inode_operations orangefs_symlink_inode_operations = {
 	.setattr = orangefs_setattr,
 	.getattr = orangefs_getattr,
 	.listxattr = orangefs_listxattr,
-	.setxattr = generic_setxattr,
 	.permission = orangefs_permission,
 };
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index a5ade8a..a8546f7 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -949,10 +949,7 @@ const struct inode_operations ovl_dir_inode_operations = {
 	.mknod		= ovl_mknod,
 	.permission	= ovl_permission,
 	.getattr	= ovl_dir_getattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ovl_listxattr,
-	.removexattr	= generic_removexattr,
 	.get_acl	= ovl_get_acl,
 	.update_time	= ovl_update_time,
 };
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index a699ff9..eb78e52 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -350,10 +350,7 @@ static const struct inode_operations ovl_file_inode_operations = {
 	.setattr	= ovl_setattr,
 	.permission	= ovl_permission,
 	.getattr	= ovl_getattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ovl_listxattr,
-	.removexattr	= generic_removexattr,
 	.get_acl	= ovl_get_acl,
 	.update_time	= ovl_update_time,
 };
@@ -363,10 +360,7 @@ static const struct inode_operations ovl_symlink_inode_operations = {
 	.get_link	= ovl_get_link,
 	.readlink	= ovl_readlink,
 	.getattr	= ovl_getattr,
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= ovl_listxattr,
-	.removexattr	= generic_removexattr,
 	.update_time	= ovl_update_time,
 };
 
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 90f815b..2f8c5c9 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -260,10 +260,7 @@ const struct file_operations reiserfs_file_operations = {
 
 const struct inode_operations reiserfs_file_inode_operations = {
 	.setattr = reiserfs_setattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = reiserfs_listxattr,
-	.removexattr = generic_removexattr,
 	.permission = reiserfs_permission,
 	.get_acl = reiserfs_get_acl,
 	.set_acl = reiserfs_set_acl,
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index 8a36696..fd7d060 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -1650,10 +1650,7 @@ const struct inode_operations reiserfs_dir_inode_operations = {
 	.mknod = reiserfs_mknod,
 	.rename = reiserfs_rename,
 	.setattr = reiserfs_setattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = reiserfs_listxattr,
-	.removexattr = generic_removexattr,
 	.permission = reiserfs_permission,
 	.get_acl = reiserfs_get_acl,
 	.set_acl = reiserfs_set_acl,
@@ -1667,10 +1664,7 @@ const struct inode_operations reiserfs_symlink_inode_operations = {
 	.readlink = generic_readlink,
 	.get_link	= page_get_link,
 	.setattr = reiserfs_setattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = reiserfs_listxattr,
-	.removexattr = generic_removexattr,
 	.permission = reiserfs_permission,
 };
 
@@ -1679,10 +1673,7 @@ const struct inode_operations reiserfs_symlink_inode_operations = {
  */
 const struct inode_operations reiserfs_special_inode_operations = {
 	.setattr = reiserfs_setattr,
-	.setxattr = generic_setxattr,
-	.getxattr = generic_getxattr,
 	.listxattr = reiserfs_listxattr,
-	.removexattr = generic_removexattr,
 	.permission = reiserfs_permission,
 	.get_acl = reiserfs_get_acl,
 	.set_acl = reiserfs_set_acl,
diff --git a/fs/squashfs/inode.c b/fs/squashfs/inode.c
index 0927b1e..e9793b1 100644
--- a/fs/squashfs/inode.c
+++ b/fs/squashfs/inode.c
@@ -425,7 +425,6 @@ failed_read:
 
 
 const struct inode_operations squashfs_inode_ops = {
-	.getxattr = generic_getxattr,
 	.listxattr = squashfs_listxattr
 };
 
diff --git a/fs/squashfs/namei.c b/fs/squashfs/namei.c
index 67cad77..40c10d9 100644
--- a/fs/squashfs/namei.c
+++ b/fs/squashfs/namei.c
@@ -247,6 +247,5 @@ failed:
 
 const struct inode_operations squashfs_dir_inode_ops = {
 	.lookup = squashfs_lookup,
-	.getxattr = generic_getxattr,
 	.listxattr = squashfs_listxattr
 };
diff --git a/fs/squashfs/symlink.c b/fs/squashfs/symlink.c
index d688ef4..79b9c31 100644
--- a/fs/squashfs/symlink.c
+++ b/fs/squashfs/symlink.c
@@ -120,7 +120,6 @@ const struct address_space_operations squashfs_symlink_aops = {
 const struct inode_operations squashfs_symlink_inode_ops = {
 	.readlink = generic_readlink,
 	.get_link = page_get_link,
-	.getxattr = generic_getxattr,
 	.listxattr = squashfs_listxattr
 };
 
diff --git a/fs/squashfs/xattr.h b/fs/squashfs/xattr.h
index c83f5d9..afe70f8 100644
--- a/fs/squashfs/xattr.h
+++ b/fs/squashfs/xattr.h
@@ -42,6 +42,5 @@ static inline int squashfs_xattr_lookup(struct super_block *sb,
 	return 0;
 }
 #define squashfs_listxattr NULL
-#define generic_getxattr NULL
 #define squashfs_xattr_handlers NULL
 #endif
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 4b86d3a..1d55aea 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -1182,10 +1182,7 @@ const struct inode_operations ubifs_dir_inode_operations = {
 	.rename      = ubifs_rename,
 	.setattr     = ubifs_setattr,
 	.getattr     = ubifs_getattr,
-	.setxattr    = generic_setxattr,
-	.getxattr    = generic_getxattr,
 	.listxattr   = ubifs_listxattr,
-	.removexattr = generic_removexattr,
 #ifdef CONFIG_UBIFS_ATIME_SUPPORT
 	.update_time = ubifs_update_time,
 #endif
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 7bbf420..4360c66 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1621,10 +1621,7 @@ const struct address_space_operations ubifs_file_address_operations = {
 const struct inode_operations ubifs_file_inode_operations = {
 	.setattr     = ubifs_setattr,
 	.getattr     = ubifs_getattr,
-	.setxattr    = generic_setxattr,
-	.getxattr    = generic_getxattr,
 	.listxattr   = ubifs_listxattr,
-	.removexattr = generic_removexattr,
 #ifdef CONFIG_UBIFS_ATIME_SUPPORT
 	.update_time = ubifs_update_time,
 #endif
@@ -1635,10 +1632,7 @@ const struct inode_operations ubifs_symlink_inode_operations = {
 	.get_link    = simple_get_link,
 	.setattr     = ubifs_setattr,
 	.getattr     = ubifs_getattr,
-	.setxattr    = generic_setxattr,
-	.getxattr    = generic_getxattr,
 	.listxattr   = ubifs_listxattr,
-	.removexattr = generic_removexattr,
 #ifdef CONFIG_UBIFS_ATIME_SUPPORT
 	.update_time = ubifs_update_time,
 #endif
diff --git a/fs/xattr.c b/fs/xattr.c
index 2432442..3368659 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -741,22 +741,6 @@ SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
 }
 
 /*
- * Find the handler for the prefix and dispatch its get() operation.
- */
-ssize_t
-generic_getxattr(struct dentry *dentry, struct inode *inode,
-		 const char *name, void *buffer, size_t size)
-{
-	const struct xattr_handler *handler;
-
-	handler = xattr_resolve_name(inode, &name);
-	if (IS_ERR(handler))
-		return PTR_ERR(handler);
-	return handler->get(handler, dentry, inode,
-			    name, buffer, size);
-}
-
-/*
  * Combine the results of the list() operation from every xattr_handler in the
  * list.
  */
@@ -792,44 +776,7 @@ generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
 	}
 	return size;
 }
-
-/*
- * Find the handler for the prefix and dispatch its set() operation.
- */
-int
-generic_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
-		 const void *value, size_t size, int flags)
-{
-	const struct xattr_handler *handler;
-
-	if (size == 0)
-		value = "";  /* empty EA, do not remove */
-	handler = xattr_resolve_name(inode, &name);
-	if (IS_ERR(handler))
-		return PTR_ERR(handler);
-	return handler->set(handler, dentry, inode, name, value, size, flags);
-}
-
-/*
- * Find the handler for the prefix and dispatch its set() operation to remove
- * any associated extended attribute.
- */
-int
-generic_removexattr(struct dentry *dentry, const char *name)
-{
-	const struct xattr_handler *handler;
-
-	handler = xattr_resolve_name(d_inode(dentry), &name);
-	if (IS_ERR(handler))
-		return PTR_ERR(handler);
-	return handler->set(handler, dentry, d_inode(dentry), name, NULL,
-			    0, XATTR_REPLACE);
-}
-
-EXPORT_SYMBOL(generic_getxattr);
 EXPORT_SYMBOL(generic_listxattr);
-EXPORT_SYMBOL(generic_setxattr);
-EXPORT_SYMBOL(generic_removexattr);
 
 /**
  * xattr_full_name  -  Compute full attribute name from suffix
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index ab820f8..08e9c0b 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -1029,9 +1029,6 @@ static const struct inode_operations xfs_inode_operations = {
 	.set_acl		= xfs_set_acl,
 	.getattr		= xfs_vn_getattr,
 	.setattr		= xfs_vn_setattr,
-	.setxattr		= generic_setxattr,
-	.getxattr		= generic_getxattr,
-	.removexattr		= generic_removexattr,
 	.listxattr		= xfs_vn_listxattr,
 	.fiemap			= xfs_vn_fiemap,
 	.update_time		= xfs_vn_update_time,
@@ -1057,9 +1054,6 @@ static const struct inode_operations xfs_dir_inode_operations = {
 	.set_acl		= xfs_set_acl,
 	.getattr		= xfs_vn_getattr,
 	.setattr		= xfs_vn_setattr,
-	.setxattr		= generic_setxattr,
-	.getxattr		= generic_getxattr,
-	.removexattr		= generic_removexattr,
 	.listxattr		= xfs_vn_listxattr,
 	.update_time		= xfs_vn_update_time,
 	.tmpfile		= xfs_vn_tmpfile,
@@ -1085,9 +1079,6 @@ static const struct inode_operations xfs_dir_ci_inode_operations = {
 	.set_acl		= xfs_set_acl,
 	.getattr		= xfs_vn_getattr,
 	.setattr		= xfs_vn_setattr,
-	.setxattr		= generic_setxattr,
-	.getxattr		= generic_getxattr,
-	.removexattr		= generic_removexattr,
 	.listxattr		= xfs_vn_listxattr,
 	.update_time		= xfs_vn_update_time,
 	.tmpfile		= xfs_vn_tmpfile,
@@ -1098,9 +1089,6 @@ static const struct inode_operations xfs_symlink_inode_operations = {
 	.get_link		= xfs_vn_get_link,
 	.getattr		= xfs_vn_getattr,
 	.setattr		= xfs_vn_setattr,
-	.setxattr		= generic_setxattr,
-	.getxattr		= generic_getxattr,
-	.removexattr		= generic_removexattr,
 	.listxattr		= xfs_vn_listxattr,
 	.update_time		= xfs_vn_update_time,
 };
@@ -1110,9 +1098,6 @@ static const struct inode_operations xfs_inline_symlink_inode_operations = {
 	.get_link		= xfs_vn_get_link_inline,
 	.getattr		= xfs_vn_getattr,
 	.setattr		= xfs_vn_setattr,
-	.setxattr		= generic_setxattr,
-	.getxattr		= generic_getxattr,
-	.removexattr		= generic_removexattr,
 	.listxattr		= xfs_vn_listxattr,
 	.update_time		= xfs_vn_update_time,
 };
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c97a20c..6842d6d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1738,12 +1738,7 @@ struct inode_operations {
 			struct inode *, struct dentry *, unsigned int);
 	int (*setattr) (struct dentry *, struct iattr *);
 	int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
-	int (*setxattr) (struct dentry *, struct inode *,
-			 const char *, const void *, size_t, int);
-	ssize_t (*getxattr) (struct dentry *, struct inode *,
-			     const char *, void *, size_t);
 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
-	int (*removexattr) (struct dentry *, const char *);
 	int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
 		      u64 len);
 	int (*update_time)(struct inode *, struct timespec *, int);
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index 6ae6b2e..e77605a 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -55,11 +55,7 @@ int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int);
 int __vfs_removexattr(struct dentry *, const char *);
 int vfs_removexattr(struct dentry *, const char *);
 
-ssize_t generic_getxattr(struct dentry *dentry, struct inode *inode, const char *name, void *buffer, size_t size);
 ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);
-int generic_setxattr(struct dentry *dentry, struct inode *inode,
-		     const char *name, const void *value, size_t size, int flags);
-int generic_removexattr(struct dentry *dentry, const char *name);
 ssize_t vfs_getxattr_alloc(struct dentry *dentry, const char *name,
 			   char **xattr_value, size_t size, gfp_t flags);
 
diff --git a/mm/shmem.c b/mm/shmem.c
index fd8b2b5..95d6c49 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -3287,10 +3287,7 @@ static const struct inode_operations shmem_short_symlink_operations = {
 	.readlink	= generic_readlink,
 	.get_link	= simple_get_link,
 #ifdef CONFIG_TMPFS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= shmem_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 };
 
@@ -3298,10 +3295,7 @@ static const struct inode_operations shmem_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.get_link	= shmem_get_link,
 #ifdef CONFIG_TMPFS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= shmem_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 };
 
@@ -3795,10 +3789,7 @@ static const struct inode_operations shmem_inode_operations = {
 	.getattr	= shmem_getattr,
 	.setattr	= shmem_setattr,
 #ifdef CONFIG_TMPFS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= shmem_listxattr,
-	.removexattr	= generic_removexattr,
 	.set_acl	= simple_set_acl,
 #endif
 };
@@ -3817,10 +3808,7 @@ static const struct inode_operations shmem_dir_inode_operations = {
 	.tmpfile	= shmem_tmpfile,
 #endif
 #ifdef CONFIG_TMPFS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= shmem_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 #ifdef CONFIG_TMPFS_POSIX_ACL
 	.setattr	= shmem_setattr,
@@ -3830,10 +3818,7 @@ static const struct inode_operations shmem_dir_inode_operations = {
 
 static const struct inode_operations shmem_special_inode_operations = {
 #ifdef CONFIG_TMPFS_XATTR
-	.setxattr	= generic_setxattr,
-	.getxattr	= generic_getxattr,
 	.listxattr	= shmem_listxattr,
-	.removexattr	= generic_removexattr,
 #endif
 #ifdef CONFIG_TMPFS_POSIX_ACL
 	.setattr	= shmem_setattr,
diff --git a/net/socket.c b/net/socket.c
index e54d871..6c53778 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -528,7 +528,6 @@ static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer,
 }
 
 static const struct inode_operations sockfs_inode_ops = {
-	.getxattr = generic_getxattr,
 	.listxattr = sockfs_listxattr,
 };
 
-- 
2.7.4

Re: [PATCH v4 20/20] vfs: Remove {get,set,remove}xattr inode operations

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 8184 bytes --]

Hi Andreas,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc3 next-20160822]
[cannot apply to linux/master]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]

url:    https://github.com/0day-ci/linux/commits/Andreas-Gruenbacher/Xattr-inode-operation-removal/20160823-053404
config: i386-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

>> drivers/staging/lustre/lustre/llite/file.c:3216:2: error: unknown field 'setxattr' specified in initializer
     .setxattr = ll_setxattr,
     ^
   drivers/staging/lustre/lustre/llite/file.c:3216:14: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .setxattr = ll_setxattr,
                 ^~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/file.c:3216:14: note: (near initialization for 'll_file_inode_operations.get_acl')
>> drivers/staging/lustre/lustre/llite/file.c:3217:2: error: unknown field 'getxattr' specified in initializer
     .getxattr = ll_getxattr,
     ^
   drivers/staging/lustre/lustre/llite/file.c:3217:14: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .getxattr = ll_getxattr,
                 ^~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/file.c:3217:14: note: (near initialization for 'll_file_inode_operations.readlink')
>> drivers/staging/lustre/lustre/llite/file.c:3219:2: error: unknown field 'removexattr' specified in initializer
     .removexattr = ll_removexattr,
     ^
   drivers/staging/lustre/lustre/llite/file.c:3219:17: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .removexattr = ll_removexattr,
                    ^~~~~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/file.c:3219:17: note: (near initialization for 'll_file_inode_operations.fiemap')
   cc1: some warnings being treated as errors
--
>> drivers/staging/lustre/lustre/llite/namei.c:1104:2: error: unknown field 'setxattr' specified in initializer
     .setxattr    = ll_setxattr,
     ^
   drivers/staging/lustre/lustre/llite/namei.c:1104:17: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .setxattr    = ll_setxattr,
                    ^~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/namei.c:1104:17: note: (near initialization for 'll_dir_inode_operations.get_acl')
>> drivers/staging/lustre/lustre/llite/namei.c:1105:2: error: unknown field 'getxattr' specified in initializer
     .getxattr    = ll_getxattr,
     ^
   drivers/staging/lustre/lustre/llite/namei.c:1105:17: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .getxattr    = ll_getxattr,
                    ^~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/namei.c:1105:17: note: (near initialization for 'll_dir_inode_operations.readlink')
>> drivers/staging/lustre/lustre/llite/namei.c:1107:2: error: unknown field 'removexattr' specified in initializer
     .removexattr = ll_removexattr,
     ^
   drivers/staging/lustre/lustre/llite/namei.c:1107:17: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .removexattr = ll_removexattr,
                    ^~~~~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/namei.c:1107:17: note: (near initialization for 'll_dir_inode_operations.fiemap')
   drivers/staging/lustre/lustre/llite/namei.c:1115:2: error: unknown field 'setxattr' specified in initializer
     .setxattr       = ll_setxattr,
     ^
   drivers/staging/lustre/lustre/llite/namei.c:1115:20: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .setxattr       = ll_setxattr,
                       ^~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/namei.c:1115:20: note: (near initialization for 'll_special_inode_operations.get_acl')
   drivers/staging/lustre/lustre/llite/namei.c:1116:2: error: unknown field 'getxattr' specified in initializer
     .getxattr       = ll_getxattr,
     ^
   drivers/staging/lustre/lustre/llite/namei.c:1116:20: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .getxattr       = ll_getxattr,
                       ^~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/namei.c:1116:20: note: (near initialization for 'll_special_inode_operations.readlink')
   drivers/staging/lustre/lustre/llite/namei.c:1118:2: error: unknown field 'removexattr' specified in initializer
     .removexattr    = ll_removexattr,
     ^
   drivers/staging/lustre/lustre/llite/namei.c:1118:20: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .removexattr    = ll_removexattr,
                       ^~~~~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/namei.c:1118:20: note: (near initialization for 'll_special_inode_operations.fiemap')
   cc1: some warnings being treated as errors
--
>> drivers/staging/lustre/lustre/llite/symlink.c:158:2: error: unknown field 'setxattr' specified in initializer
     .setxattr = ll_setxattr,
     ^
   drivers/staging/lustre/lustre/llite/symlink.c:158:14: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .setxattr = ll_setxattr,
                 ^~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/symlink.c:158:14: note: (near initialization for 'll_fast_symlink_inode_operations.get_acl')
>> drivers/staging/lustre/lustre/llite/symlink.c:159:2: error: unknown field 'getxattr' specified in initializer
     .getxattr = ll_getxattr,
     ^
   drivers/staging/lustre/lustre/llite/symlink.c:159:14: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .getxattr = ll_getxattr,
                 ^~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/symlink.c:159:14: note: (near initialization for 'll_fast_symlink_inode_operations.readlink')
>> drivers/staging/lustre/lustre/llite/symlink.c:161:2: error: unknown field 'removexattr' specified in initializer
     .removexattr = ll_removexattr,
     ^
   drivers/staging/lustre/lustre/llite/symlink.c:161:17: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .removexattr = ll_removexattr,
                    ^~~~~~~~~~~~~~
   drivers/staging/lustre/lustre/llite/symlink.c:161:17: note: (near initialization for 'll_fast_symlink_inode_operations.fiemap')
   cc1: some warnings being treated as errors

vim +/setxattr +3216 drivers/staging/lustre/lustre/llite/file.c

d7e09d039 Peng Tao     2013-05-02  3210  };
d7e09d039 Peng Tao     2013-05-02  3211  
d2d32738d Julia Lawall 2015-11-14  3212  const struct inode_operations ll_file_inode_operations = {
d7e09d039 Peng Tao     2013-05-02  3213  	.setattr	= ll_setattr,
d7e09d039 Peng Tao     2013-05-02  3214  	.getattr	= ll_getattr,
d7e09d039 Peng Tao     2013-05-02  3215  	.permission	= ll_inode_permission,
d7e09d039 Peng Tao     2013-05-02 @3216  	.setxattr	= ll_setxattr,
d7e09d039 Peng Tao     2013-05-02 @3217  	.getxattr	= ll_getxattr,
d7e09d039 Peng Tao     2013-05-02  3218  	.listxattr	= ll_listxattr,
d7e09d039 Peng Tao     2013-05-02 @3219  	.removexattr	= ll_removexattr,
89580e379 Peng Tao     2013-11-15  3220  	.fiemap		= ll_fiemap,
d7e09d039 Peng Tao     2013-05-02  3221  	.get_acl	= ll_get_acl,
d7e09d039 Peng Tao     2013-05-02  3222  };

:::::: The code at line 3216 was first introduced by commit
:::::: d7e09d0397e84eefbabfd9cb353221f3c6448d83 staging: add Lustre file system client support

:::::: TO: Peng Tao <bergwolf@gmail.com>
:::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/octet-stream, Size: 55886 bytes --]

[PATCH] lustre: Switch to generic xattr handlers

[Andreas Gruenbacher]

This was still missing from the "xattr inode operation removal" patch queue.
I've updated the git tree as well:

  https://git.kernel.org/cgit/linux/kernel/git/agruen/linux.git/log/?h=work.xattr

Thanks,
Andreas

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 drivers/staging/lustre/lustre/llite/file.c         |  3 --
 .../staging/lustre/lustre/llite/llite_internal.h   |  7 ++--
 drivers/staging/lustre/lustre/llite/llite_lib.c    |  1 +
 drivers/staging/lustre/lustre/llite/namei.c        |  6 ----
 drivers/staging/lustre/lustre/llite/symlink.c      |  3 --
 drivers/staging/lustre/lustre/llite/xattr.c        | 42 +++++++++++++++++++---
 6 files changed, 40 insertions(+), 22 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
index 57281b9..e8c81e8 100644
--- a/drivers/staging/lustre/lustre/llite/file.c
+++ b/drivers/staging/lustre/lustre/llite/file.c
@@ -3213,10 +3213,7 @@ const struct inode_operations ll_file_inode_operations = {
 	.setattr	= ll_setattr,
 	.getattr	= ll_getattr,
 	.permission	= ll_inode_permission,
-	.setxattr	= ll_setxattr,
-	.getxattr	= ll_getxattr,
 	.listxattr	= ll_listxattr,
-	.removexattr	= ll_removexattr,
 	.fiemap		= ll_fiemap,
 	.get_acl	= ll_get_acl,
 };
diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h
index 4d6d589..8695aca 100644
--- a/drivers/staging/lustre/lustre/llite/llite_internal.h
+++ b/drivers/staging/lustre/lustre/llite/llite_internal.h
@@ -933,12 +933,9 @@ static inline __u64 ll_file_maxbytes(struct inode *inode)
 }
 
 /* llite/xattr.c */
-int ll_setxattr(struct dentry *dentry, struct inode *inode,
-		const char *name, const void *value, size_t size, int flags);
-ssize_t ll_getxattr(struct dentry *dentry, struct inode *inode,
-		    const char *name, void *buffer, size_t size);
+struct xattr_handler;
+extern const struct xattr_handler *lustre_xattr_handlers[];
 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size);
-int ll_removexattr(struct dentry *dentry, const char *name);
 
 /**
  * Common IO arguments for various VFS I/O interfaces.
diff --git a/drivers/staging/lustre/lustre/llite/llite_lib.c b/drivers/staging/lustre/lustre/llite/llite_lib.c
index 546063e..81f4fe9 100644
--- a/drivers/staging/lustre/lustre/llite/llite_lib.c
+++ b/drivers/staging/lustre/lustre/llite/llite_lib.c
@@ -421,6 +421,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 #if THREAD_SIZE >= 8192 /*b=17630*/
 	sb->s_export_op = &lustre_export_operations;
 #endif
+	sb->s_xattr = lustre_xattr_handlers;
 
 	/* make root inode
 	 * XXX: move this to after cbd setup?
diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c
index 3664bfd..53467b2 100644
--- a/drivers/staging/lustre/lustre/llite/namei.c
+++ b/drivers/staging/lustre/lustre/llite/namei.c
@@ -1101,10 +1101,7 @@ const struct inode_operations ll_dir_inode_operations = {
 	.setattr	    = ll_setattr,
 	.getattr	    = ll_getattr,
 	.permission	 = ll_inode_permission,
-	.setxattr	   = ll_setxattr,
-	.getxattr	   = ll_getxattr,
 	.listxattr	  = ll_listxattr,
-	.removexattr	= ll_removexattr,
 	.get_acl	    = ll_get_acl,
 };
 
@@ -1112,9 +1109,6 @@ const struct inode_operations ll_special_inode_operations = {
 	.setattr	= ll_setattr,
 	.getattr	= ll_getattr,
 	.permission     = ll_inode_permission,
-	.setxattr       = ll_setxattr,
-	.getxattr       = ll_getxattr,
 	.listxattr      = ll_listxattr,
-	.removexattr    = ll_removexattr,
 	.get_acl	    = ll_get_acl,
 };
diff --git a/drivers/staging/lustre/lustre/llite/symlink.c b/drivers/staging/lustre/lustre/llite/symlink.c
index 8c8bdfe..d82dab2 100644
--- a/drivers/staging/lustre/lustre/llite/symlink.c
+++ b/drivers/staging/lustre/lustre/llite/symlink.c
@@ -155,8 +155,5 @@ const struct inode_operations ll_fast_symlink_inode_operations = {
 	.get_link	= ll_get_link,
 	.getattr	= ll_getattr,
 	.permission	= ll_inode_permission,
-	.setxattr	= ll_setxattr,
-	.getxattr	= ll_getxattr,
 	.listxattr	= ll_listxattr,
-	.removexattr	= ll_removexattr,
 };
diff --git a/drivers/staging/lustre/lustre/llite/xattr.c b/drivers/staging/lustre/lustre/llite/xattr.c
index 98303cf..f43f523 100644
--- a/drivers/staging/lustre/lustre/llite/xattr.c
+++ b/drivers/staging/lustre/lustre/llite/xattr.c
@@ -34,6 +34,7 @@
 #include <linux/sched.h>
 #include <linux/mm.h>
 #include <linux/selinux.h>
+#include <linux/xattr.h>
 
 #define DEBUG_SUBSYSTEM S_LLITE
 
@@ -149,8 +150,9 @@ int ll_setxattr_common(struct inode *inode, const char *name,
 	return 0;
 }
 
-int ll_setxattr(struct dentry *dentry, struct inode *inode,
-		const char *name, const void *value, size_t size, int flags)
+static int ll_setxattr(struct dentry *dentry, struct inode *inode,
+		       const char *name, const void *value, size_t size,
+		       int flags)
 {
 	LASSERT(inode);
 	LASSERT(name);
@@ -202,7 +204,7 @@ int ll_setxattr(struct dentry *dentry, struct inode *inode,
 				  OBD_MD_FLXATTR);
 }
 
-int ll_removexattr(struct dentry *dentry, const char *name)
+static int ll_removexattr(struct dentry *dentry, const char *name)
 {
 	struct inode *inode = d_inode(dentry);
 
@@ -351,8 +353,8 @@ out:
 	return rc;
 }
 
-ssize_t ll_getxattr(struct dentry *dentry, struct inode *inode,
-		    const char *name, void *buffer, size_t size)
+static ssize_t ll_getxattr(struct dentry *dentry, struct inode *inode,
+			   const char *name, void *buffer, size_t size)
 {
 	LASSERT(inode);
 	LASSERT(name);
@@ -518,3 +520,33 @@ out:
 
 	return rc;
 }
+
+static int lustre_xattr_get(const struct xattr_handler *handler,
+			    struct dentry *dentry, struct inode *inode,
+			    const char *name, void *buffer, size_t size)
+{
+	return ll_getxattr(dentry, inode, name, buffer, size);
+}
+
+static int lustre_xattr_set(const struct xattr_handler *handler,
+			    struct dentry *dentry, struct inode *inode,
+			    const char *name, const void *value, size_t size,
+			    int flags)
+{
+	if (!value) {
+		BUG_ON(flags != XATTR_REPLACE);
+		return ll_removexattr(dentry, name);
+	}
+	return ll_setxattr(dentry, inode, name, value, size, flags);
+}
+
+const struct xattr_handler lustre_xattr_handler = {
+	.prefix = "",  /* match anything */
+	.get = lustre_xattr_get,
+	.set = lustre_xattr_set,
+};
+
+const struct xattr_handler *lustre_xattr_handlers[] = {
+	&lustre_xattr_handler,
+	NULL
+};
-- 
2.7.4