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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-06-07 18:21:05 (GMT)
committerVladislav Yasevich <vxy@hera.kernel.org>2007-06-13 20:44:42 (GMT)
commit8a4794914f9cf2681235ec2311e189fe307c28c7 (patch)
tree029530de3f65445050e7f4c3ad4cd0195b127fa4 /include
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 'include')
-rw-r--r--include/net/sctp/sctp.h7
-rw-r--r--include/net/sctp/structs.h6
2 files changed, 13 insertions, 0 deletions
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index dda72bf..16baef4 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -503,6 +503,13 @@ static inline int sctp_frag_point(const struct sctp_sock *sp, int pmtu)
return frag;
}
+static inline void sctp_assoc_pending_pmtu(struct sctp_association *asoc)
+{
+
+ sctp_assoc_sync_pmtu(asoc);
+ asoc->pmtu_pending = 0;
+}
+
/* Walk through a list of TLV parameters. Don't trust the
* individual parameter lengths and instead depend on
* the chunk length to indicate when to stop. Make sure
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index dc0e70c..ee4559b 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -912,6 +912,9 @@ struct sctp_transport {
*/
__u16 pathmaxrxt;
+ /* is the Path MTU update pending on this tranport */
+ __u8 pmtu_pending;
+
/* PMTU : The current known path MTU. */
__u32 pathmtu;
@@ -1566,6 +1569,9 @@ struct sctp_association {
*/
__u16 pathmaxrxt;
+ /* Flag that path mtu update is pending */
+ __u8 pmtu_pending;
+
/* Association : The smallest PMTU discovered for all of the
* PMTU : peer's transport addresses.
*/

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