ceph: allow renewal of auth credentials

Add infrastructure to allow the mon_client to periodically renew its auth
credentials.  Also add a messenger callback that will force such a renewal
if a peer rejects our authenticator.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 4e3e8b229e67..aa8506bad42d 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -2946,12 +2946,25 @@ static int verify_authorizer_reply(struct ceph_connection *con, int len)
         return ac->ops->verify_authorizer_reply(ac, s->s_authorizer, len);
 }
 
+static int invalidate_authorizer(struct ceph_connection *con)
+{
+        struct ceph_mds_session *s = con->private;
+        struct ceph_mds_client *mdsc = s->s_mdsc;
+        struct ceph_auth_client *ac = mdsc->client->monc.auth;
+
+        if (ac->ops->invalidate_authorizer)
+                ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_MDS);
+
+        return ceph_monc_validate_auth(&mdsc->client->monc);
+}
+
 const static struct ceph_connection_operations mds_con_ops = {
         .get = con_get,
         .put = con_put,
         .dispatch = dispatch,
         .get_authorizer = get_authorizer,
         .verify_authorizer_reply = verify_authorizer_reply,
+        .invalidate_authorizer = invalidate_authorizer,
         .peer_reset = peer_reset,
 };