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authorVlad Yasevich <vladislav.yasevich@hp.com>2010-04-30 22:41:09 -0400
committerVlad Yasevich <vladislav.yasevich@hp.com>2010-04-30 22:41:09 -0400
commitae19c54866450f6c6f79223ca7d37965859a54e1 (patch)
tree4da39a450974841532148b15b15de182c8e40dac /net/sctp
parentd598b166ced20d9b9281ea3527c0e18405ddb803 (diff)
downloadlinux-ae19c54866450f6c6f79223ca7d37965859a54e1.tar.bz2
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>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/output.c25
-rw-r--r--net/sctp/outqueue.c1
-rw-r--r--net/sctp/sm_make_chunk.c1
3 files changed, 9 insertions, 18 deletions
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;