From 5469155f2bc83bb2c88b0a0370c3d54d87eed06e Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Mon, 30 Jul 2012 16:21:40 -0700 Subject: libceph: protect ceph_con_open() with mutex Take the con mutex while we are initiating a ceph open. This is necessary because the may have previously been in use and then closed, which could result in a racing workqueue running con_work(). Signed-off-by: Sage Weil Reviewed-by: Yehuda Sadeh Reviewed-by: Alex Elder --- net/ceph/messenger.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/ceph') diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index f1bd3bbb0c4..a4779988c84 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -537,6 +537,7 @@ void ceph_con_open(struct ceph_connection *con, __u8 entity_type, __u64 entity_num, struct ceph_entity_addr *addr) { + mutex_lock(&con->mutex); dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); set_bit(OPENING, &con->state); WARN_ON(!test_and_clear_bit(CLOSED, &con->state)); @@ -546,6 +547,7 @@ void ceph_con_open(struct ceph_connection *con, memcpy(&con->peer_addr, addr, sizeof(*addr)); con->delay = 0; /* reset backoff memory */ + mutex_unlock(&con->mutex); queue_con(con); } EXPORT_SYMBOL(ceph_con_open); -- cgit v1.2.3