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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-06-07 14:21:05 -0400
committerVladislav Yasevich <vxy@hera.kernel.org>2007-06-13 20:44:42 +0000
commit8a4794914f9cf2681235ec2311e189fe307c28c7 (patch)
tree029530de3f65445050e7f4c3ad4cd0195b127fa4 /net/sctp/input.c
parentc910b47e1811b3f8b184108c48de3d7af3e2999b (diff)
[SCTP] Flag a pmtu change request
Currently, if the socket is owned by the user, we drop the ICMP message. As a result SCTP forgets that path MTU changed and never adjusting it's estimate. This causes all subsequent packets to be fragmented. With this patch, we'll flag the association that it needs to udpate it's estimate based on the already updated routing information. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Acked-by: Sridhar Samudrala <sri@us.ibm.com>
Diffstat (limited to 'net/sctp/input.c')
-rw-r--r--net/sctp/input.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/net/sctp/input.c b/net/sctp/input.c
index 45d6a644cf0..d57ff7f3c57 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -367,9 +367,15 @@ static void sctp_add_backlog(struct sock *sk, struct sk_buff *skb)
void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc,
struct sctp_transport *t, __u32 pmtu)
{
- if (sock_owned_by_user(sk) || !t || (t->pathmtu == pmtu))
+ if (!t || (t->pathmtu == pmtu))
return;
+ if (sock_owned_by_user(sk)) {
+ asoc->pmtu_pending = 1;
+ t->pmtu_pending = 1;
+ return;
+ }
+
if (t->param_flags & SPP_PMTUD_ENABLE) {
/* Update transports view of the MTU */
sctp_transport_update_pmtu(t, pmtu);