ceph: avoid resending queued message to monitor

The auth_reply handler will (re)send any pending requests.  For the
initial mon authenticate phase, that's correct, but when a auth ticket
renewal races with an in-flight request, we may resend a request message
that is already in flight.  Avoid this by revoking the message before
sending it.

We should also avoid resending requests at all during ticket renewal; that
will come soon.

Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/fs/ceph/mon_client.c b/fs/ceph/mon_client.c
index 478729a..12d94f2 100644 (file)
--- a/fs/ceph/mon_client.c
+++ b/fs/ceph/mon_client.c
@@ -104,6 +104,7 @@ static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len)
        monc->pending_auth = 1;
        monc->m_auth->front.iov_len = len;
        monc->m_auth->hdr.front_len = cpu_to_le32(len);
+       ceph_con_revoke(monc->con, monc->m_auth);
        ceph_msg_get(monc->m_auth);  /* keep our ref */
        ceph_con_send(monc->con, monc->m_auth);
 }
@@ -539,6 +540,7 @@ static void __resend_generic_request(struct ceph_mon_client *monc)
 
        for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) {
                req = rb_entry(p, struct ceph_mon_generic_request, node);
+               ceph_con_revoke(monc->con, req->request);
                ceph_con_send(monc->con, ceph_msg_get(req->request));
        }
 }