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| author |   Xin Long <lucien.xin@gmail.com> | 2016-10-08 11:36:05 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-10-13 09:44:13 -0400 |
| commit | cc6ac9bccf6b9814d37932e86a92f8e6a92960dc (patch) | |
| tree | ac905a2010a6d2835d5bbea5e2541c590190aaf4 /net/sctp | |
| parent | Merge branch 'centralize-netdevice-mtu-bounds-checking' (diff) | |
| download | linux-dev-cc6ac9bccf6b9814d37932e86a92f8e6a92960dc.tar.xz linux-dev-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')
| -rw-r--r-- | net/sctp/output.c | 3 | ||||
| -rw-r--r-- | net/sctp/outqueue.c | 4 |
2 files changed, 3 insertions, 4 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; } diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c index 582585393d35..e54082699520 100644 --- a/net/sctp/outqueue.c +++ b/net/sctp/outqueue.c @@ -507,8 +507,6 @@ 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. */ @@ -1439,7 +1437,7 @@ static void sctp_check_transmitted(struct sctp_outq *q, * instance). */ if (!tchunk->tsn_gap_acked && - !tchunk->resent && + !sctp_chunk_retransmitted(tchunk) && tchunk->rtt_in_progress) { tchunk->rtt_in_progress = 0; rtt = jiffies - tchunk->sent_at; |