Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c068be5491924c1c1c37dc046f36976c27bc7bb2
Commit: c068be5491924c1c1c37dc046f36976c27bc7bb2
Parent: 01f2d38498957e967cd6f6011a6b208393957b4a
Author: Vlad Yasevich <[EMAIL PROTECTED]>
AuthorDate: Tue Jan 15 11:41:56 2008 -0500
Committer: Vlad Yasevich <[EMAIL PROTECTED]>
CommitDate: Wed Feb 6 21:26:26 2008 -0500
[SCTP]: Correctly reap SSNs when processing FORWARD_TSN chunk
When we recieve a FORWARD_TSN chunk, we need to reap
all the queued fast-forwarded chunks from the ordering queue
However, if we don't have them queued, we need to see if
the next expected one is there as well. If it is, start
deliver from that point instead of waiting for the next
chunk to arrive.
Signed-off-by: Vlad Yasevich <[EMAIL PROTECTED]>
---
net/sctp/ulpqueue.c | 23 ++++++++++++++++++++---
1 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index d300f49..5061a26 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -874,6 +874,7 @@ static void sctp_ulpq_reap_ordered(struct sctp_ulpq *ulpq,
__u16 sid)
struct sctp_ulpevent *event;
struct sctp_stream *in;
struct sk_buff_head temp;
+ struct sk_buff_head *lobby = &ulpq->lobby;
__u16 csid, cssn;
in = &ulpq->asoc->ssnmap->in;
@@ -881,7 +882,7 @@ static void sctp_ulpq_reap_ordered(struct sctp_ulpq *ulpq,
__u16 sid)
/* We are holding the chunks by stream, by SSN. */
skb_queue_head_init(&temp);
event = NULL;
- sctp_skb_for_each(pos, &ulpq->lobby, tmp) {
+ sctp_skb_for_each(pos, lobby, tmp) {
cevent = (struct sctp_ulpevent *) pos->cb;
csid = cevent->stream;
cssn = cevent->ssn;
@@ -895,10 +896,10 @@ static void sctp_ulpq_reap_ordered(struct sctp_ulpq
*ulpq, __u16 sid)
continue;
/* see if this ssn has been marked by skipping */
- if (!SSN_lte(cssn, sctp_ssn_peek(in, csid)))
+ if (!SSN_lt(cssn, sctp_ssn_peek(in, csid)))
break;
- __skb_unlink(pos, &ulpq->lobby);
+ __skb_unlink(pos, lobby);
if (!event)
/* Create a temporary list to collect chunks on. */
event = sctp_skb2event(pos);
@@ -907,6 +908,22 @@ static void sctp_ulpq_reap_ordered(struct sctp_ulpq *ulpq,
__u16 sid)
__skb_queue_tail(&temp, pos);
}
+ /* If we didn't reap any data, see if the next expected SSN
+ * is next on the queue and if so, use that.
+ */
+ if (event == NULL && pos != (struct sk_buff *)lobby) {
+ cevent = (struct sctp_ulpevent *) pos->cb;
+ csid = cevent->stream;
+ cssn = cevent->ssn;
+
+ if (csid == sid && cssn == sctp_ssn_peek(in, csid)) {
+ sctp_ssn_next(in, csid);
+ __skb_unlink(pos, lobby);
+ __skb_queue_tail(&temp, pos);
+ event = sctp_skb2event(pos);
+ }
+ }
+
/* Send event to the ULP. 'event' is the sctp_ulpevent for
* very first SKB on the 'temp' list.
*/
-
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