ceph: add exists_cb to vxattr struct

Allow for a callback to dynamically determine if a vxattr exists for
the given inode.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 234270f00c2a..06344da4e968 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -30,6 +30,7 @@ struct ceph_vxattr {
         size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val,
                               size_t size);
         bool readonly, hidden;
+        bool (*exists_cb)(struct ceph_inode_info *ci);
 };
 
 /* directories */
@@ -92,6 +93,7 @@ static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
                 .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \
                 .readonly = true,                               \
                 .hidden = false,                                \
+                .exists_cb = NULL,                      \
         }
 
 static struct ceph_vxattr ceph_dir_vxattrs[] = {