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authorXin Long <lucien.xin@gmail.com>2016-10-08 05:36:05 +0200
committerDavid S. Miller <davem@davemloft.net>2016-10-13 15:44:13 +0200
commitcc6ac9bccf6b9814d37932e86a92f8e6a92960dc (patch)
treeac905a2010a6d2835d5bbea5e2541c590190aaf4 /net/sctp/output.c
parentMerge branch 'centralize-netdevice-mtu-bounds-checking' (diff)
downloadlinux-cc6ac9bccf6b9814d37932e86a92f8e6a92960dc.tar.xz
linux-cc6ac9bccf6b9814d37932e86a92f8e6a92960dc.zip
sctp: reuse sent_count to avoid retransmitted chunks for RTT measurements
Now sctp uses chunk->resent to record if a chunk is retransmitted, for RTT measurements with retransmitted DATA chunks. chunk->sent_count was introduced to record how many times one chunk has been sent for prsctp RTX policy before. We actually can know if one chunk is retransmitted by checking chunk->sent_count is greater than 1. This patch is to remove resent from sctp_chunk and reuse sent_count to avoid retransmitted chunks for RTT measurements. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/output.c')
-rw-r--r--net/sctp/output.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sctp/output.c b/net/sctp/output.c
index 2a5c1896d18f..84f66d560b02 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c
@@ -552,7 +552,8 @@ int sctp_packet_transmit(struct sctp_packet *packet, gfp_t gfp)
* for a given destination transport address.
*/
- if (!chunk->resent && !tp->rto_pending) {
+ if (!sctp_chunk_retransmitted(chunk) &&
+ !tp->rto_pending) {
chunk->rtt_in_progress = 1;
tp->rto_pending = 1;
}