From: Vlad Yasevich Date: Tue, 30 Jan 2007 22:36:14 +0000 (-0800) Subject: [SCTP]: Force update of the rto when processing HB-ACK X-Git-Tag: firefly_0821_release~31369^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e533ca16f31f9e5abfaf5d8c7dbe7095f01474b6;p=firefly-linux-kernel-4.4.55.git [SCTP]: Force update of the rto when processing HB-ACK When processing a HEARTBEAT-ACK it's possible that the transport rto timers will not be updated because a prior T3-RTX processing would have cleared the rto_pending flag on the transport. However, if we received a valid HEARTBEAT-ACK, we want to force update the rto variables, so re-set the rto_pending flag before calling sctp_transport_update_rto(). Signed-off-by: Vlad Yasevich Signed-off-by: Sridhar Samudrala Signed-off-by: David S. Miller --- diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c index 8bd30976cdee..6db77d1329f7 100644 --- a/net/sctp/sm_sideeffect.c +++ b/net/sctp/sm_sideeffect.c @@ -621,7 +621,13 @@ static void sctp_cmd_transport_on(sctp_cmd_seq_t *cmds, /* The receiver of the HEARTBEAT ACK should also perform an * RTT measurement for that destination transport address * using the time value carried in the HEARTBEAT ACK chunk. + * If the transport's rto_pending variable has been cleared, + * it was most likely due to a retransmit. However, we want + * to re-enable it to properly update the rto. */ + if (t->rto_pending == 0) + t->rto_pending = 1; + hbinfo = (sctp_sender_hb_info_t *) chunk->skb->data; sctp_transport_update_rto(t, (jiffies - hbinfo->sent_at));