diff options
| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2010-04-30 22:41:09 -0400 |
|---|---|---|
| committer | Vlad Yasevich <vladislav.yasevich@hp.com> | 2010-04-30 22:41:09 -0400 |
| commit | ae19c54866450f6c6f79223ca7d37965859a54e1 (patch) | |
| tree | 4da39a450974841532148b15b15de182c8e40dac | |
| parent | d598b166ced20d9b9281ea3527c0e18405ddb803 (diff) | |
sctp: remove 'resent' bit from the chunk
The 'resent' bit is used to make sure that we don't update
rto estimate based on retransmitted chunks. However, we already
have the 'rto_pending' bit that we test when need to update rto,
so 'resent' bit is just extra. Additionally, we currently have
a bug in that we always set a 'resent' bit and thus rto estimate
is only updated by Heartbeats.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
| -rw-r--r-- | include/net/sctp/structs.h | 3 | ||||
| -rw-r--r-- | net/sctp/output.c | 25 | ||||
| -rw-r--r-- | net/sctp/outqueue.c | 1 | ||||
| -rw-r--r-- | net/sctp/sm_make_chunk.c | 1 |
4 files changed, 10 insertions, 20 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index ff3017744711..03deffb1886b 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -757,7 +757,6 @@ struct sctp_chunk { #define SCTP_NEED_FRTX 0x1 #define SCTP_DONT_FRTX 0x2 __u16 rtt_in_progress:1, /* This chunk used for RTT calc? */ - resent:1, /* Has this chunk ever been resent. */ has_tsn:1, /* Does this chunk have a TSN yet? */ has_ssn:1, /* Does this chunk have a SSN yet? */ singleton:1, /* Only chunk in the packet? */ @@ -1065,7 +1064,7 @@ void sctp_transport_route(struct sctp_transport *, union sctp_addr *, struct sctp_sock *); void sctp_transport_pmtu(struct sctp_transport *); void sctp_transport_free(struct sctp_transport *); -void sctp_transport_reset_timers(struct sctp_transport *, int); +void sctp_transport_reset_timers(struct sctp_transport *); void sctp_transport_hold(struct sctp_transport *); void sctp_transport_put(struct sctp_transport *); void sctp_transport_update_rto(struct sctp_transport *, __u32); diff --git a/net/sctp/output.c b/net/sctp/output.c index fad261d41ec2..35e49b9df4e0 100644 --- a/net/sctp/output.c +++ b/net/sctp/output.c @@ -429,24 +429,17 @@ int sctp_packet_transmit(struct sctp_packet *packet) list_for_each_entry_safe(chunk, tmp, &packet->chunk_list, list) { list_del_init(&chunk->list); if (sctp_chunk_is_data(chunk)) { + /* 6.3.1 C4) When data is in flight and when allowed + * by rule C5, a new RTT measurement MUST be made each + * round trip. Furthermore, new RTT measurements + * SHOULD be made no more than once per round-trip + * for a given destination transport address. + */ - if (!chunk->resent) { - - /* 6.3.1 C4) When data is in flight and when allowed - * by rule C5, a new RTT measurement MUST be made each - * round trip. Furthermore, new RTT measurements - * SHOULD be made no more than once per round-trip - * for a given destination transport address. - */ - - if (!tp->rto_pending) { - chunk->rtt_in_progress = 1; - tp->rto_pending = 1; - } + if (!tp->rto_pending) { + chunk->rtt_in_progress = 1; + tp->rto_pending = 1; } - - chunk->resent = 1; - has_data = 1; } diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c index a4fe7dee76e8..4e551ba8998c 100644 --- a/net/sctp/outqueue.c +++ b/net/sctp/outqueue.c @@ -1405,7 +1405,6 @@ 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; diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c index 33aed1c6cbd6..24effdf471eb 100644 --- a/net/sctp/sm_make_chunk.c +++ b/net/sctp/sm_make_chunk.c @@ -1205,7 +1205,6 @@ struct sctp_chunk *sctp_chunkify(struct sk_buff *skb, INIT_LIST_HEAD(&retval->list); retval->skb = skb; retval->asoc = (struct sctp_association *)asoc; - retval->resent = 0; retval->has_tsn = 0; retval->has_ssn = 0; retval->rtt_in_progress = 0; |