ceph: add ceph.dir.layout vxattr

This virtual xattr will only appear when there is a dir layout policy
set on the directory.  It can be set via setxattr and removed via
removexattr (implemented by the MDS).

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Sam Lang <sam.lang@inktank.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 532c95a6c9fa..f3c4fe7202c7 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -142,6 +142,14 @@ static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
         }
 
 static struct ceph_vxattr ceph_dir_vxattrs[] = {
+        {
+                .name = "ceph.dir.layout",
+                .name_size = sizeof("ceph.dir.layout"),
+                .getxattr_cb = ceph_vxattrcb_layout,
+                .readonly = false,
+                .hidden = false,
+                .exists_cb = ceph_vxattrcb_layout_exists,
+        },
         XATTR_NAME_CEPH(dir, entries),
         XATTR_NAME_CEPH(dir, files),
         XATTR_NAME_CEPH(dir, subdirs),