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libceph: initialize ack_stamp to avoid unnecessary connection reset

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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>
This commit is contained in:
Jim Schutt 2011-09-16 08:27:31 -06:00 committed by Sage Weil
parent aca420bc51
commit c0d5f9db1c
1 changed files with 1 additions and 0 deletions
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net/ceph/messenger.c
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@ -2307,6 +2307,7 @@ struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags)
m->front_max = front_len;
m->front_is_vmalloc = false;
m->more_to_follow = false;
m->ack_stamp = 0;
m->pool = NULL;
/* middle */