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* [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Retran
@ 2014-04-25 17:06 ` Karl Heiss
  0 siblings, 0 replies; 10+ messages in thread
From: Karl Heiss @ 2014-04-25 17:06 UTC (permalink / raw)
  To: netdev; +Cc: linux-sctp, davem, vyasevich, nhorman

Don't transition to the PF state on every strike after 'Path.Max.Retrans'.
Per draft-ietf-tsvwg-sctp-failover-03 Section 5.1.6:

   Additional (PMR - PFMR) consecutive timeouts on a PF destination
   confirm the path failure, upon which the destination transitions to the
   Inactive state.  As described in [RFC4960], the sender (i) SHOULD notify
   ULP about this state transition, and (ii) transmit heartbeats to the
   Inactive destination at a lower frequency as described in Section 8.3 of
   [RFC4960].

This also prevents sending SCTP_ADDR_UNREACHABLE to the user as the state
bounces between SCTP_INACTIVE and SCTP_PF for each subsequent strike.

Signed-off-by: Karl Heiss <kheiss@gmail.com>
---
Changes in v2:
  - Flesh out commit message

Changes in v3:
  - Compare transport state instead of pathmaxrxt

 net/sctp/sm_sideeffect.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 5d6883f..7805623 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -496,11 +496,12 @@ static void sctp_do_8_2_transport_strike(sctp_cmd_seq_t *commands,
 
 	/* If the transport error count is greater than the pf_retrans
 	 * threshold, and less than pathmaxrtx, and if the current state
-	 * is not SCTP_UNCONFIRMED, then mark this transport as Partially
-	 * Failed, see SCTP Quick Failover Draft, section 5.1
+	 * is not SCTP_UNCONFIRMED or SCTP_INACTIVE, then mark this transport
+	 * as Partially Failed, see SCTP Quick Failover Draft, section 5.1
 	 */
 	if ((transport->state != SCTP_PF) &&
 	   (transport->state != SCTP_UNCONFIRMED) &&
+	   (transport->state != SCTP_INACTIVE) &&
 	   (asoc->pf_retrans < transport->pathmaxrxt) &&
 	   (transport->error_count > asoc->pf_retrans)) {
 
-- 
1.7.1


^ permalink raw reply related	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2014-04-25 18:40 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
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2014-04-25 17:06 [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Retran Karl Heiss
2014-04-25 17:06 ` [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Retrans' Karl Heiss
2014-04-25 17:21 ` [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Re Karl Heiss
2014-04-25 17:21   ` [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Retrans' Karl Heiss
2014-04-25 17:34   ` [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Re Vlad Yasevich
2014-04-25 17:34     ` [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Retrans' Vlad Yasevich
2014-04-25 17:22 ` [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Re Vlad Yasevich
2014-04-25 17:22   ` [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Retrans' Vlad Yasevich
2014-04-25 18:40 ` [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Re Neil Horman
2014-04-25 18:40   ` [PATCH v3 net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Retrans' Neil Horman

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