net: Use sk_mark for routing lookup in more places

This patch against v2.6.31 adds support for route lookup using sk_mark in some 
more places. The benefits from this patch are the following.
First, SO_MARK option now has effect on UDP sockets too.
Second, ip_queue_xmit() and inet_sk_rebuild_header() could fail to do routing 
lookup correctly if TCP sockets with SO_MARK were used.

Signed-off-by: Atis Elsts <atis@mikrotik.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 3326aff65906..6ec6a8a4a224 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -696,6 +696,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 
         if (rt == NULL) {
                 struct flowi fl = { .oif = ipc.oif,
+                                    .mark = sk->sk_mark,
                                     .nl_u = { .ip4_u =
                                               { .daddr = faddr,
                                                 .saddr = saddr,