[PATCH] Access Control Lists for tmpfs

Add access control lists for tmpfs.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index c057f0b32318..f3c51899117f 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -19,6 +19,10 @@ struct shmem_inode_info {
         swp_entry_t             i_direct[SHMEM_NR_DIRECT]; /* first blocks */
         struct list_head        swaplist;       /* chain of maybes on swap */
         struct inode            vfs_inode;
+#ifdef CONFIG_TMPFS_POSIX_ACL
+        struct posix_acl        *i_acl;
+        struct posix_acl        *i_default_acl;
+#endif
 };
 
 struct shmem_sb_info {
@@ -36,4 +40,24 @@ static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
         return container_of(inode, struct shmem_inode_info, vfs_inode);
 }
 
+#ifdef CONFIG_TMPFS_POSIX_ACL
+int shmem_permission(struct inode *, int, struct nameidata *);
+int shmem_acl_init(struct inode *, struct inode *);
+void shmem_acl_destroy_inode(struct inode *);
+
+extern struct xattr_handler shmem_xattr_acl_access_handler;
+extern struct xattr_handler shmem_xattr_acl_default_handler;
+
+extern struct generic_acl_operations shmem_acl_ops;
+
+#else
+static inline int shmem_acl_init(struct inode *inode, struct inode *dir)
+{
+        return 0;
+}
+static inline void shmem_acl_destroy_inode(struct inode *inode)
+{
+}
+#endif  /* CONFIG_TMPFS_POSIX_ACL */
+
 #endif