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authorVlad Yasevich <vladislav.yasevich@hp.com>2011-04-18 23:13:56 +0400
committerDavid S. Miller <davem@davemloft.net>2011-04-20 08:45:21 +0400
commitf246a7b7c5b9df0ea0f0807a7101995af5e83213 (patch)
tree4362f120c0f483b603407f04c66a0f7b472b0287 /net/sctp/outqueue.c
parent934253a7b4ab4151037ea9532552628723a14442 (diff)
downloadlinux-f246a7b7c5b9df0ea0f0807a7101995af5e83213.tar.xz
sctp: teach CACC algorithm about removed transports
When we have have to remove a transport due to ASCONF, we move the data to a new active path. This can trigger CACC algorithm to not mark that data as missing when SACKs arrive. This is because the transport passed to the CACC algorithm is the one this data is sitting on, not the one it was sent on (that one may be gone). So, by sending the original transport (even if it's NULL), we may start marking data as missing. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/outqueue.c')
-rw-r--r--net/sctp/outqueue.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index bf92a5b68f8b..7812772dbf74 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -131,7 +131,8 @@ static inline int sctp_cacc_skip_3_1_d(struct sctp_transport *primary,
static inline int sctp_cacc_skip_3_1_f(struct sctp_transport *transport,
int count_of_newacks)
{
- if (count_of_newacks < 2 && !transport->cacc.cacc_saw_newack)
+ if (count_of_newacks < 2 &&
+ (transport && !transport->cacc.cacc_saw_newack))
return 1;
return 0;
}
@@ -618,9 +619,12 @@ redo:
/* If we are retransmitting, we should only
* send a single packet.
+ * Otherwise, try appending this chunk again.
*/
if (rtx_timeout || fast_rtx)
done = 1;
+ else
+ goto redo;
/* Bundle next chunk in the next round. */
break;
@@ -1683,8 +1687,9 @@ static void sctp_mark_missing(struct sctp_outq *q,
/* SFR-CACC may require us to skip marking
* this chunk as missing.
*/
- if (!transport || !sctp_cacc_skip(primary, transport,
- count_of_newacks, tsn)) {
+ if (!transport || !sctp_cacc_skip(primary,
+ chunk->transport,
+ count_of_newacks, tsn)) {
chunk->tsn_missing_report++;
SCTP_DEBUG_PRINTK(