diff options
| author | Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> | 2018-04-24 18:17:35 -0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-04-25 13:22:07 -0400 |
| commit | 51446780fc33e45cb790c05a7fa2c5bf7e8bc53b (patch) | |
| tree | 7e19d85f9b7b9bf2aeb2f230e9e7a774b0896146 /net/sctp | |
| parent | 47b3ba5175e940c9be5fd6aec05d6e7e048ff823 (diff) | |
| download | linux-51446780fc33e45cb790c05a7fa2c5bf7e8bc53b.tar.gz | |
sctp: fix identification of new acks for SFR-CACC
It's currently written as:
if (!tchunk->tsn_gap_acked) { [1]
tchunk->tsn_gap_acked = 1;
...
}
if (TSN_lte(tsn, sack_ctsn)) {
if (!tchunk->tsn_gap_acked) {
/* SFR-CACC processing */
...
}
}
Which causes the SFR-CACC processing on ack reception to never process,
as tchunk->tsn_gap_acked is always true by then. Block [1] was
moved to that position by the commit marked below.
This patch fixes it by doing SFR-CACC processing earlier, before
tsn_gap_acked is set to true.
Fixes: 31b02e154940 ("sctp: Failover transmitted list on transport delete")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/outqueue.c | 48 |
1 files changed, 23 insertions, 25 deletions
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c index f211b3db6a35..dee7cbd54831 100644 --- a/net/sctp/outqueue.c +++ b/net/sctp/outqueue.c @@ -1457,7 +1457,7 @@ static void sctp_check_transmitted(struct sctp_outq *q, * the outstanding bytes for this chunk, so only * count bytes associated with a transport. */ - if (transport) { + if (transport && !tchunk->tsn_gap_acked) { /* If this chunk is being used for RTT * measurement, calculate the RTT and update * the RTO using this value. @@ -1469,14 +1469,34 @@ static void sctp_check_transmitted(struct sctp_outq *q, * first instance of the packet or a later * instance). */ - if (!tchunk->tsn_gap_acked && - !sctp_chunk_retransmitted(tchunk) && + if (!sctp_chunk_retransmitted(tchunk) && tchunk->rtt_in_progress) { tchunk->rtt_in_progress = 0; rtt = jiffies - tchunk->sent_at; sctp_transport_update_rto(transport, rtt); } + + if (TSN_lte(tsn, sack_ctsn)) { + /* + * SFR-CACC algorithm: + * 2) If the SACK contains gap acks + * and the flag CHANGEOVER_ACTIVE is + * set the receiver of the SACK MUST + * take the following action: + * + * B) For each TSN t being acked that + * has not been acked in any SACK so + * far, set cacc_saw_newack to 1 for + * the destination that the TSN was + * sent to. + */ + if (sack->num_gap_ack_blocks && + q->asoc->peer.primary_path->cacc. + changeover_active) + transport->cacc.cacc_saw_newack + = 1; + } } /* If the chunk hasn't been marked as ACKED, @@ -1508,28 +1528,6 @@ static void sctp_check_transmitted(struct sctp_outq *q, restart_timer = 1; forward_progress = true; - if (!tchunk->tsn_gap_acked) { - /* - * SFR-CACC algorithm: - * 2) If the SACK contains gap acks - * and the flag CHANGEOVER_ACTIVE is - * set the receiver of the SACK MUST - * take the following action: - * - * B) For each TSN t being acked that - * has not been acked in any SACK so - * far, set cacc_saw_newack to 1 for - * the destination that the TSN was - * sent to. - */ - if (transport && - sack->num_gap_ack_blocks && - q->asoc->peer.primary_path->cacc. - changeover_active) - transport->cacc.cacc_saw_newack - = 1; - } - list_add_tail(&tchunk->transmitted_list, &q->sacked); } else { |