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authorNeil Horman <nhorman@tuxdriver.com>2013-01-17 11:15:08 +0000
committerDavid S. Miller <davem@davemloft.net>2013-01-17 18:39:56 -0500
commit2f94aabd9f6c925d77aecb3ff020f1cc12ed8f86 (patch)
tree6f634d10b8bd5620acdab7b34d05728aed9cea05 /net/sctp
parent01fe944f1024bd4e5c327ddbe8d657656b66af2f (diff)
downloadlinux-2f94aabd9f6c925d77aecb3ff020f1cc12ed8f86.tar.bz2
sctp: refactor sctp_outq_teardown to insure proper re-initalization
Jamie Parsons reported a problem recently, in which the re-initalization of an association (The duplicate init case), resulted in a loss of receive window space. He tracked down the root cause to sctp_outq_teardown, which discarded all the data on an outq during a re-initalization of the corresponding association, but never reset the outq->outstanding_data field to zero. I wrote, and he tested this fix, which does a proper full re-initalization of the outq, fixing this problem, and hopefully future proofing us from simmilar issues down the road. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Reported-by: Jamie Parsons <Jamie.Parsons@metaswitch.com> Tested-by: Jamie Parsons <Jamie.Parsons@metaswitch.com> CC: Jamie Parsons <Jamie.Parsons@metaswitch.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: "David S. Miller" <davem@davemloft.net> CC: netdev@vger.kernel.org Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/outqueue.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index 379c81dee9d1..9bcdbd02d777 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -224,7 +224,7 @@ void sctp_outq_init(struct sctp_association *asoc, struct sctp_outq *q)
/* Free the outqueue structure and any related pending chunks.
*/
-void sctp_outq_teardown(struct sctp_outq *q)
+static void __sctp_outq_teardown(struct sctp_outq *q)
{
struct sctp_transport *transport;
struct list_head *lchunk, *temp;
@@ -277,8 +277,6 @@ void sctp_outq_teardown(struct sctp_outq *q)
sctp_chunk_free(chunk);
}
- q->error = 0;
-
/* Throw away any leftover control chunks. */
list_for_each_entry_safe(chunk, tmp, &q->control_chunk_list, list) {
list_del_init(&chunk->list);
@@ -286,11 +284,17 @@ void sctp_outq_teardown(struct sctp_outq *q)
}
}
+void sctp_outq_teardown(struct sctp_outq *q)
+{
+ __sctp_outq_teardown(q);
+ sctp_outq_init(q->asoc, q);
+}
+
/* Free the outqueue structure and any related pending chunks. */
void sctp_outq_free(struct sctp_outq *q)
{
/* Throw away leftover chunks. */
- sctp_outq_teardown(q);
+ __sctp_outq_teardown(q);
/* If we were kmalloc()'d, free the memory. */
if (q->malloced)