ceph: make sure write caps are registered with auth MDS

Only auth MDS can issue write caps to clients, so don't consider
write caps registered with non-auth MDS as valid.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 17543383545c162f58425fbc8629a99f1c5a717e..d9ef44e5474ee7e667d881c5051922a55061d36a 100644 (file)
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -885,7 +885,10 @@ int __ceph_caps_mds_wanted(struct ceph_inode_info *ci)
                cap = rb_entry(p, struct ceph_cap, ci_node);
                if (!__cap_is_valid(cap))
                        continue;
-               mds_wanted |= cap->mds_wanted;
+               if (cap == ci->i_auth_cap)
+                       mds_wanted |= cap->mds_wanted;
+               else
+                       mds_wanted |= (cap->mds_wanted & ~CEPH_CAP_ANY_FILE_WR);
        }
        return mds_wanted;
 }