ceph: print more information when we can't find snaprealm

Print a bit more information when we can't find the realm during
ceph_add_cap. Show both the inode number and the old realm inode
number.

Suggested-by: Sage Weil <sage@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index b75a9e1..1f544ee 100644 (file)
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -703,13 +703,12 @@ void ceph_add_cap(struct inode *inode,
                 */
                struct ceph_snap_realm *realm = ceph_lookup_snap_realm(mdsc,
                                                               realmino);
-               if (realm) {
+               if (realm)
                        ceph_change_snap_realm(inode, realm);
-               } else {
-                       pr_err("ceph_add_cap: couldn't find snap realm %llx\n",
-                              realmino);
-                       WARN_ON(!realm);
-               }
+               else
+                       WARN(1, "%s: couldn't find snap realm 0x%llx (ino 0x%llx oldrealm 0x%llx)\n",
+                            __func__, realmino, ci->i_vino.ino,
+                            ci->i_snap_realm ? ci->i_snap_realm->ino : 0);
        }
 
        __check_cap_issue(ci, cap, issued);