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authorXufeng Zhang <xufeng.zhang@windriver.com>2013-11-25 07:26:57 +0400
committerDavid S. Miller <davem@davemloft.net>2013-11-29 03:29:58 +0400
commit6eabca54d6781f61c7318517c1463a098acb7a87 (patch)
treeb546ca46b835a418c3e80d55c3fdcb86dade25b3 /net/sctp/outqueue.c
parent5e53e689b737526308db2b5c9f56e9d0371a1676 (diff)
downloadlinux-6eabca54d6781f61c7318517c1463a098acb7a87.tar.xz
sctp: Restore 'resent' bit to avoid retransmitted chunks for RTT measurements
Currently retransmitted DATA chunks could also be used for RTT measurements since there are no flag to identify whether the transmitted DATA chunk is a new one or a retransmitted one. This problem is introduced by commit ae19c5486 ("sctp: remove 'resent' bit from the chunk") which inappropriately removed the 'resent' bit completely, instead of doing this, we should set the resent bit only for the retransmitted DATA chunks. Signed-off-by: Xufeng Zhang <xufeng.zhang@windriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/outqueue.c')
-rw-r--r--net/sctp/outqueue.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index abb6db008df1..f51ba985a36e 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -446,6 +446,8 @@ void sctp_retransmit_mark(struct sctp_outq *q,
transport->rto_pending = 0;
}
+ chunk->resent = 1;
+
/* Move the chunk to the retransmit queue. The chunks
* on the retransmit queue are always kept in order.
*/
@@ -1375,6 +1377,7 @@ static void sctp_check_transmitted(struct sctp_outq *q,
* instance).
*/
if (!tchunk->tsn_gap_acked &&
+ !tchunk->resent &&
tchunk->rtt_in_progress) {
tchunk->rtt_in_progress = 0;
rtt = jiffies - tchunk->sent_at;