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Commit d9efc223 authored by Vlad Yasevich's avatar Vlad Yasevich
Browse files

sctp: Do not force T3 timer on fast retransmissions. 



We don't need to force the T3 timer any more and it's
actually wrong to do as it causes too long of a delay.
The timer will be started if one is not running, but if
one is running, we leave it alone.

Signed-off-by: default avatarVlad Yasevich <vladislav.yasevich@hp.com>
parent ae19c548

net/sctp/outqueue.c

+3 −12
Original line number Diff line number Diff line
@@ -659,14 +659,6 @@ redo: 
			if (chunk->fast_retransmit == SCTP_NEED_FRTX)

				chunk->fast_retransmit = SCTP_DONT_FRTX;



			/* Force start T3-rtx timer when fast retransmitting

			 * the earliest outstanding TSN

			 */

			if (!timer && fast_rtx &&

			    ntohl(chunk->subh.data_hdr->tsn) ==

					     asoc->ctsn_ack_point + 1)

				timer = 2;



			q->empty = 0;

			break;

		}
@@ -871,7 +863,7 @@ static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout) 
				 * sender MUST assure that at least one T3-rtx

				 * timer is running.

				 */

				sctp_transport_reset_timers(transport, 0);

				sctp_transport_reset_timers(transport);

			}

			break;
@@ -924,8 +916,7 @@ static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout) 
						    rtx_timeout, &start_timer);



			if (start_timer)

				sctp_transport_reset_timers(transport,

							    start_timer-1);

				sctp_transport_reset_timers(transport);



			/* This can happen on COOKIE-ECHO resend.  Only

			 * one chunk can get bundled with a COOKIE-ECHO.
@@ -1058,7 +1049,7 @@ static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout) 
			list_add_tail(&chunk->transmitted_list,

				      &transport->transmitted);



			sctp_transport_reset_timers(transport, 0);

			sctp_transport_reset_timers(transport);



			q->empty = 0;

net/sctp/transport.c

+2 −2
Original line number Diff line number Diff line
@@ -195,7 +195,7 @@ static void sctp_transport_destroy(struct sctp_transport *transport) 
/* Start T3_rtx timer if it is not already running and update the heartbeat

 * timer.  This routine is called every time a DATA chunk is sent.

 */

void sctp_transport_reset_timers(struct sctp_transport *transport, int force)

void sctp_transport_reset_timers(struct sctp_transport *transport)

{

	/* RFC 2960 6.3.2 Retransmission Timer Rules

	 *
@@ -205,7 +205,7 @@ void sctp_transport_reset_timers(struct sctp_transport *transport, int force) 
	 * address.

	 */



	if (force || !timer_pending(&transport->T3_rtx_timer))

	if (!timer_pending(&transport->T3_rtx_timer))

		if (!mod_timer(&transport->T3_rtx_timer,

			       jiffies + transport->rto))

			sctp_transport_hold(transport);