[PATCH 084/270] libceph: drop connection refcounting for mon_client

[Herton Ronaldo Krzesinski]

3.5.7u1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sage Weil <sage at inktank.com>

commit ec87ef4309d33bd9c87a53bb5152a86ae7a65f25 upstream.

All references to the embedded ceph_connection come from the msgr
workqueue, which is drained prior to mon_client destruction.  That
means we can ignore con refcounting entirely.

Signed-off-by: Sage Weil <sage at newdream.net>
Reviewed-by: Alex Elder <elder at inktank.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
---
 net/ceph/mon_client.c |   18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
index ec75996..b59ca7a 100644
--- a/net/ceph/mon_client.c
+++ b/net/ceph/mon_client.c
@@ -1037,9 +1037,23 @@ out:
 	mutex_unlock(&monc->mutex);
 }
 
+/*
+ * We can ignore refcounting on the connection struct, as all references
+ * will come from the messenger workqueue, which is drained prior to
+ * mon_client destruction.
+ */
+static struct ceph_connection *con_get(struct ceph_connection *con)
+{
+	return con;
+}
+
+static void con_put(struct ceph_connection *con)
+{
+}
+
 static const struct ceph_connection_operations mon_con_ops = {
-	.get = ceph_con_get,
-	.put = ceph_con_put,
+	.get = con_get,
+	.put = con_put,
 	.dispatch = dispatch,
 	.fault = mon_fault,
 	.alloc_msg = mon_alloc_msg,
-- 
1.7.9.5