Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ef5d4cf2f9aae4e09883d2d664e367a16b47d857
Commit: ef5d4cf2f9aae4e09883d2d664e367a16b47d857
Parent: 215f7b08f2a142ec19f4bd3d6de263e68b877955
Author: Vlad Yasevich <[EMAIL PROTECTED]>
AuthorDate: Sun Dec 16 14:05:45 2007 -0800
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Sun Dec 16 14:05:45 2007 -0800
[SCTP]: Flush fragment queue when exiting partial delivery.
At the end of partial delivery, we may have complete messages
sitting on the fragment queue. These messages are stuck there
until a new fragment arrives. This can comletely stall a
given association. When clearing partial delivery state, flush
any complete messages from the fragment queue and send them on
their way up.
Signed-off-by: Vlad Yasevich <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
net/sctp/ulpqueue.c | 33 +++++++++++++++++++++++++++++++++
1 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index 4908041..1733fa2 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -53,6 +53,7 @@ static struct sctp_ulpevent * sctp_ulpq_reasm(struct
sctp_ulpq *ulpq,
struct sctp_ulpevent *);
static struct sctp_ulpevent * sctp_ulpq_order(struct sctp_ulpq *,
struct sctp_ulpevent *);
+static void sctp_ulpq_reasm_drain(struct sctp_ulpq *ulpq);
/* 1st Level Abstractions */
@@ -190,6 +191,7 @@ static void sctp_ulpq_set_pd(struct sctp_ulpq *ulpq)
static int sctp_ulpq_clear_pd(struct sctp_ulpq *ulpq)
{
ulpq->pd_mode = 0;
+ sctp_ulpq_reasm_drain(ulpq);
return sctp_clear_pd(ulpq->asoc->base.sk, ulpq->asoc);
}
@@ -699,6 +701,37 @@ void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *ulpq,
__u32 fwd_tsn)
}
}
+/*
+ * Drain the reassembly queue. If we just cleared parted delivery, it
+ * is possible that the reassembly queue will contain already reassembled
+ * messages. Retrieve any such messages and give them to the user.
+ */
+static void sctp_ulpq_reasm_drain(struct sctp_ulpq *ulpq)
+{
+ struct sctp_ulpevent *event = NULL;
+ struct sk_buff_head temp;
+
+ if (skb_queue_empty(&ulpq->reasm))
+ return;
+
+ while ((event = sctp_ulpq_retrieve_reassembled(ulpq)) != NULL) {
+ /* Do ordering if needed. */
+ if ((event) && (event->msg_flags & MSG_EOR)){
+ skb_queue_head_init(&temp);
+ __skb_queue_tail(&temp, sctp_event2skb(event));
+
+ event = sctp_ulpq_order(ulpq, event);
+ }
+
+ /* Send event to the ULP. 'event' is the
+ * sctp_ulpevent for very first SKB on the temp' list.
+ */
+ if (event)
+ sctp_ulpq_tail_event(ulpq, event);
+ }
+}
+
+
/* Helper function to gather skbs that have possibly become
* ordered by an an incoming chunk.
*/
-
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