sctp: Store a flowi in transports to provide persistent keying.

Several future simplifications are possible now because of this.

For example, the sctp_addr unions can simply refer directly to
the flowi information.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 6 deletions

diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index d8595dd1a8a7..394c57ca2f54 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -213,13 +213,11 @@ void sctp_transport_set_owner(struct sctp_transport *transport,
 /* Initialize the pmtu of a transport. */
 void sctp_transport_pmtu(struct sctp_transport *transport, struct sock *sk)
 {
-        struct flowi fl;
-
         /* 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,
-                                              &fl, sk);
+                                                &transport->fl, sk);
         }
 
         if (transport->dst) {
@@ -274,14 +272,13 @@ void sctp_transport_route(struct sctp_transport *transport,
 {
         struct sctp_association *asoc = transport->asoc;
         struct sctp_af *af = transport->af_specific;
-        struct flowi fl;
 
-        af->get_dst(transport, saddr, &fl, sctp_opt2sk(opt));
+        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, transport, &fl);
+                af->get_saddr(opt, transport, &transport->fl);
 
         if ((transport->param_flags & SPP_PMTUD_DISABLE) && transport->pathmtu) {
                 return;