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authorVlad Yasevich <vladislav.yasevich@hp.com>2009-09-04 18:21:00 -0400
committerVlad Yasevich <vladislav.yasevich@hp.com>2009-09-04 18:21:00 -0400
commit31b02e1549406efa346534acad956a42bc3f28c4 (patch)
tree3acc807275810eb2efdc5fc2744bdfc3528488c2 /net/sctp/associola.c
parentf68b2e05f326971cd76c65aa91a1a41771dd7485 (diff)
sctp: Failover transmitted list on transport delete
Add-IP feature allows users to delete an active transport. If that transport has chunks in flight, those chunks need to be moved to another transport or association may get into unrecoverable state. Reported-by: Rafael Laufer <rlaufer@cisco.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'net/sctp/associola.c')
-rw-r--r--net/sctp/associola.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 1f05b942564..caba989f4e7 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -584,6 +584,33 @@ void sctp_assoc_rm_peer(struct sctp_association *asoc,
asoc->addip_last_asconf->transport == peer)
asoc->addip_last_asconf->transport = NULL;
+ /* If we have something on the transmitted list, we have to
+ * save it off. The best place is the active path.
+ */
+ if (!list_empty(&peer->transmitted)) {
+ struct sctp_transport *active = asoc->peer.active_path;
+ struct sctp_chunk *ch;
+
+ /* Reset the transport of each chunk on this list */
+ list_for_each_entry(ch, &peer->transmitted,
+ transmitted_list) {
+ ch->transport = NULL;
+ ch->rtt_in_progress = 0;
+ }
+
+ list_splice_tail_init(&peer->transmitted,
+ &active->transmitted);
+
+ /* Start a T3 timer here in case it wasn't running so
+ * that these migrated packets have a chance to get
+ * retrnasmitted.
+ */
+ if (!timer_pending(&active->T3_rtx_timer))
+ if (!mod_timer(&active->T3_rtx_timer,
+ jiffies + active->rto))
+ sctp_transport_hold(active);
+ }
+
asoc->peer.transport_count--;
sctp_transport_free(peer);