Merge remote-tracking branch 'origin/develop-3.0-jb' into develop-3.0

[firefly-linux-kernel-4.4.55.git] / net / sctp / transport.c

diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index 132046cb82fc764ae758a0535aad8816946ae1d2..8da4481ed30ab66b6731c6c7117c1532290be534 100644 (file)
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -48,6 +48,8 @@
  * be incorporated into the next SCTP release.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/random.h>
@@ -209,45 +211,29 @@ void sctp_transport_set_owner(struct sctp_transport *transport,
 }
 
 /* Initialize the pmtu of a transport. */
-void sctp_transport_pmtu(struct sctp_transport *transport)
+void sctp_transport_pmtu(struct sctp_transport *transport, struct sock *sk)
 {
-       struct dst_entry *dst;
-
-       dst = transport->af_specific->get_dst(NULL, &transport->ipaddr, NULL);
+       /* If we don't have a fresh route, look one up */
+       if (!transport->dst || transport->dst->obsolete > 1) {
+               dst_release(transport->dst);
+               transport->af_specific->get_dst(transport, &transport->saddr,
+                                               &transport->fl, sk);
+       }
 
-       if (dst) {
-               transport->pathmtu = dst_mtu(dst);
-               dst_release(dst);
+       if (transport->dst) {
+               transport->pathmtu = dst_mtu(transport->dst);
        } else
                transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
 }
 
-/* this is a complete rip-off from __sk_dst_check
- * the cookie is always 0 since this is how it's used in the
- * pmtu code
- */
-static struct dst_entry *sctp_transport_dst_check(struct sctp_transport *t)
-{
-       struct dst_entry *dst = t->dst;
-
-       if (dst && dst->obsolete && dst->ops->check(dst, 0) == NULL) {
-               dst_release(t->dst);
-               t->dst = NULL;
-               return NULL;
-       }
-
-       return dst;
-}
-
 void sctp_transport_update_pmtu(struct sctp_transport *t, u32 pmtu)
 {
        struct dst_entry *dst;
 
        if (unlikely(pmtu < SCTP_DEFAULT_MINSEGMENT)) {
-               printk(KERN_WARNING "%s: Reported pmtu %d too low, "
-                      "using default minimum of %d\n",
-                      __func__, pmtu,
-                      SCTP_DEFAULT_MINSEGMENT);
+               pr_warn("%s: Reported pmtu %d too low, using default minimum of %d\n",
+                       __func__, pmtu,
+                       SCTP_DEFAULT_MINSEGMENT);
                /* Use default minimum segment size and disable
                 * pmtu discovery on this transport.
                 */
@@ -269,22 +255,19 @@ void sctp_transport_route(struct sctp_transport *transport,
 {
        struct sctp_association *asoc = transport->asoc;
        struct sctp_af *af = transport->af_specific;
-       union sctp_addr *daddr = &transport->ipaddr;
-       struct dst_entry *dst;
 
-       dst = af->get_dst(asoc, daddr, saddr);
+       af->get_dst(transport, saddr, &transport->fl, sctp_opt2sk(opt));
 
        if (saddr)
                memcpy(&transport->saddr, saddr, sizeof(union sctp_addr));
        else
-               af->get_saddr(opt, asoc, dst, daddr, &transport->saddr);
+               af->get_saddr(opt, transport, &transport->fl);
 
-       transport->dst = dst;
        if ((transport->param_flags & SPP_PMTUD_DISABLE) && transport->pathmtu) {
                return;
        }
-       if (dst) {
-               transport->pathmtu = dst_mtu(dst);
+       if (transport->dst) {
+               transport->pathmtu = dst_mtu(transport->dst);
 
                /* Initialize sk->sk_rcv_saddr, if the transport is the
                 * association's active path for getsockname().