ceph: use connection mutex to protect read and write stages

Use a single mutex (previously out_mutex) to protect both read and write
activity from concurrent ceph_con_* calls.  Drop the mutex when doing
callbacks to avoid nested locking (the callback may need to call something
like ceph_con_close).

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

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/ceph/messenger.h b/fs/ceph/messenger.h
index e04c214b4f6..94b55de9033 100644
--- a/fs/ceph/messenger.h
+++ b/fs/ceph/messenger.h
@@ -155,8 +155,9 @@ struct ceph_connection {
 	void *auth_reply_buf;   /* where to put the authorizer reply */
 	int auth_reply_buf_len;
 
+	struct mutex mutex;
+
 	/* out queue */
-	struct mutex out_mutex;
 	struct list_head out_queue;
 	struct list_head out_sent;   /* sending or sent but unacked */
 	u64 out_seq;		     /* last message queued for send */