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>

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 58c4b0f..57737b8 100644 (file)
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1119,6 +1119,7 @@ int inet_sk_rebuild_header(struct sock *sk)
 {
        struct flowi fl = {
                .oif = sk->sk_bound_dev_if,
+               .mark = sk->sk_mark,
                .nl_u = {
                        .ip4_u = {
                                .daddr  = daddr,

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 9fe5d7b..f989518 100644 (file)
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -335,6 +335,7 @@ int ip_queue_xmit(struct sk_buff *skb, int ipfragok)
 
                {
                        struct flowi fl = { .oif = sk->sk_bound_dev_if,
+                                           .mark = sk->sk_mark,
                                            .nl_u = { .ip4_u =
                                                      { .daddr = daddr,
                                                        .saddr = inet->saddr,

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 3326aff..6ec6a8a 100644 (file)
--- 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,