Btrfs: Implement ACLs setting and getting

ACLs are stored but not used for permission checks (yet)

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 4 insertions, 12 deletions

diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 33caaf5b4b0c..85ac42605f8d 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -141,11 +141,6 @@ ssize_t btrfs_xattr_get(struct inode *inode, int name_index,
 
         if (!handler)
                 return -EOPNOTSUPP;
-
-        /* just in case... */
-        if (*attr_name == '\0')
-                return -EINVAL;
-
         name = get_name(attr_name, name_index);
         if (!name)
                 return -ENOMEM;
@@ -201,14 +196,8 @@ int btrfs_xattr_set(struct inode *inode, int name_index,
         struct xattr_handler *handler = btrfs_xattr_handler(name_index);
         char *name;
         int ret = 0, mod = 0;
-
         if (!handler)
                 return -EOPNOTSUPP;
-
-        /* just in case... */
-        if (*attr_name == '\0')
-                return -EINVAL;
-
         name = get_name(attr_name, name_index);
         if (!name)
                 return -ENOMEM;
@@ -454,15 +443,18 @@ static int btrfs_xattr_##name##_get(struct inode *inode,		\
                                     const char *name, void *value,      \
                                     size_t size)                        \
 {                                                                       \
+        if (*name == '\0')                                              \
+                return -EINVAL;                                         \
         return btrfs_xattr_get(inode, index, name, value, size);        \
 }                                                                       \
 static int btrfs_xattr_##name##_set(struct inode *inode,                \
                                     const char *name, const void *value,\
                                     size_t size, int flags)             \
 {                                                                       \
+        if (*name == '\0')                                              \
+                return -EINVAL;                                         \
         return btrfs_xattr_set(inode, index, name, value, size, flags); \
 }                                                                       \
-
 BTRFS_XATTR_SETGET_FUNCS(security, BTRFS_XATTR_INDEX_SECURITY);
 BTRFS_XATTR_SETGET_FUNCS(system, BTRFS_XATTR_INDEX_SYSTEM);
 BTRFS_XATTR_SETGET_FUNCS(user, BTRFS_XATTR_INDEX_USER);