libceph: initialize ack_stamp to avoid unnecessary connection reset
Commit 4cf9d544631c recorded when an outgoing ceph message was ACKed,
in order to avoid unnecessary connection resets when an OSD is busy.
However, ack_stamp is uninitialized, so there is a window between
when the message is sent and when it is ACKed in which handle_timeout()
interprets the unitialized value as an expired timeout, and resets
the connection unnecessarily.
Close the window by initializing ack_stamp.
Signed-off-by: Jim Schutt <jaschut@sandia.gov>
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index c340e2e..9918e9e 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -2307,6 +2307,7 @@
m->front_max = front_len;
m->front_is_vmalloc = false;
m->more_to_follow = false;
+ m->ack_stamp = 0;
m->pool = NULL;
/* middle */