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libceph: cleanup old messages according to reconnect seq

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when reopen a connection, use 'reconnect seq' to clean up
messages that have already been received by peer.

Link: http://tracker.ceph.com/issues/18690
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng 2017-05-05 18:47:37 +08:00 committed by Ilya Dryomov
parent 293dffaad8
commit 0a2ad54107
1 changed files with 12 additions and 3 deletions
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15
net/ceph/messenger.c
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@ -2228,10 +2228,18 @@ static void process_ack(struct ceph_connection *con)
struct ceph_msg *m;
u64 ack = le64_to_cpu(con->in_temp_ack);
u64 seq;
bool reconnect = (con->in_tag == CEPH_MSGR_TAG_SEQ);
struct list_head *list = reconnect ? &con->out_queue : &con->out_sent;
while (!list_empty(&con->out_sent)) {
m = list_first_entry(&con->out_sent, struct ceph_msg,
list_head);
/*
* In the reconnect case, con_fault() has requeued messages
* in out_sent. We should cleanup old messages according to
* the reconnect seq.
*/
while (!list_empty(list)) {
m = list_first_entry(list, struct ceph_msg, list_head);
if (reconnect && m->needs_out_seq)
break;
seq = le64_to_cpu(m->hdr.seq);
if (seq > ack)
break;
@ -2240,6 +2248,7 @@ static void process_ack(struct ceph_connection *con)
m->ack_stamp = jiffies;
ceph_msg_remove(m);
}
prepare_read_tag(con);
}