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authorChang Xiangzhong <changxiangzhong@gmail.com>2013-11-21 22:56:28 +0100
committerDavid S. Miller <davem@davemloft.net>2013-11-23 14:46:18 -0800
commitd6c416148545bd99d3cc05e672460168245cc156 (patch)
tree21252007b7d92340e39f3ddb03734f8cf93605f6 /net/sctp/outqueue.c
parent9d8506cc2d7ea1f911c72c100193a3677f6668c3 (diff)
net: sctp: find the correct highest_new_tsn in sack
Function sctp_check_transmitted(transport t, ...) would iterate all of transport->transmitted queue and looking for the highest __newly__ acked tsn. The original algorithm would depend on the order of the assoc->transport_list (in function sctp_outq_sack line 1215 - 1226). The result might not be the expected due to the order of the tranport_list. Solution: checking if the exising is smaller than the new one before assigning Signed-off-by: Chang Xiangzhong <changxiangzhong@gmail.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.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, 2 insertions, 1 deletions
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index 94df7587786..abb6db008df 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -1391,7 +1391,8 @@ static void sctp_check_transmitted(struct sctp_outq *q,
*/
if (!tchunk->tsn_gap_acked) {
tchunk->tsn_gap_acked = 1;
- *highest_new_tsn_in_sack = tsn;
+ if (TSN_lt(*highest_new_tsn_in_sack, tsn))
+ *highest_new_tsn_in_sack = tsn;
bytes_acked += sctp_data_size(tchunk);
if (!tchunk->transport)
migrate_bytes += sctp_data_size(tchunk);