ext4: reserve xattr index for Rich ACL support

Jan Kara <jack@suse.cz>

SUSE is carrying out of tree patches for Rich ACL support for ext4 as
they didn't get upstream due to opposition of some VFS maintainers.
Reserve xattr index for Rich ACLs so that it cannot be taken by
anything else which would force users to backup and reset their Rich
ACLs on files.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index aa25deb5c6cde14014cbbc5d8259f6de28980d36..c767dbdd7fc495e5a4fd4a5c581455db73c5c1c3 100644 (file)
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -22,6 +22,7 @@
 #define        EXT4_XATTR_INDEX_LUSTRE                 5
 #define EXT4_XATTR_INDEX_SECURITY              6
 #define EXT4_XATTR_INDEX_SYSTEM                        7
+#define EXT4_XATTR_INDEX_RICHACL               8
 
 struct ext4_xattr_header {
        __le32  h_magic;        /* magic number for identification */