Use sk_mark for IPv6 routing lookups

Atis Elsts wrote:
> Not sure if there is need to fill the mark from skb in tunnel xmit functions. In any case, it's not done for GRE or IPIP tunnels at the moment.

Ok, I'll just drop that part, I'm not sure what should be done in this case.

> Also, in this patch you are doing that for SIT (v6-in-v4) tunnels only, and not doing it for v4-in-v6 or v6-in-v6 tunnels. Any reason for that?

I just sent that patch out too quickly, here's a better one with the updates.

Add support for IPv6 route lookups using sk_mark.

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 21d100b68b19..321aafd40dcb 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -243,6 +243,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
         ipv6_addr_copy(&fl.fl6_src,
                        (saddr ? saddr : &np->saddr));
         fl.oif = sk->sk_bound_dev_if;
+        fl.mark = sk->sk_mark;
         fl.fl_ip_dport = usin->sin6_port;
         fl.fl_ip_sport = inet->sport;
 
@@ -383,6 +384,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
                         ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
                         ipv6_addr_copy(&fl.fl6_src, &np->saddr);
                         fl.oif = sk->sk_bound_dev_if;
+                        fl.mark = sk->sk_mark;
                         fl.fl_ip_dport = inet->dport;
                         fl.fl_ip_sport = inet->sport;
                         security_skb_classify_flow(skb, &fl);
@@ -477,6 +479,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req)
         ipv6_addr_copy(&fl.fl6_src, &treq->loc_addr);
         fl.fl6_flowlabel = 0;
         fl.oif = treq->iif;
+        fl.mark = sk->sk_mark;
         fl.fl_ip_dport = inet_rsk(req)->rmt_port;
         fl.fl_ip_sport = inet_rsk(req)->loc_port;
         security_req_classify_flow(req, &fl);
@@ -1345,6 +1348,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
                 }
                 ipv6_addr_copy(&fl.fl6_src, &treq->loc_addr);
                 fl.oif = sk->sk_bound_dev_if;
+                fl.mark = sk->sk_mark;
                 fl.fl_ip_dport = inet_rsk(req)->rmt_port;
                 fl.fl_ip_sport = inet_rsk(req)->loc_port;
                 security_req_classify_flow(req, &fl);