net: core: Support UID-based routing.

This contains the following commits:

1. 0149763 net: core: Add a UID range to fib rules.
2. 1650474 net: core: Use the socket UID in routing lookups.
3. 0b16771 net: ipv4: Add the UID to the route cache.
4. ee058f1 net: core: Add a RTA_UID attribute to routes.
    This is so that userspace can do per-UID route lookups.

Bug: 15413527
Change-Id: I1285474c6734614d3bda6f61d88dfe89a4af7892
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Git-commit: 0b428749ce5969bc06c73855e360141b4e7126e8
Git-repo: https://android.googlesource.com/kernel/common.git
Signed-off-by: Ian Maund <imaund@codeaurora.org>
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index bbd604c..b5b563d 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -567,7 +567,8 @@
 			   RT_SCOPE_UNIVERSE,
 			   inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
 			   inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP,
-			   daddr, saddr, 0, 0);
+			   daddr, saddr, 0, 0,
+			   sock_i_uid(sk));
 
 	if (!inet->hdrincl) {
 		err = raw_probe_proto_opt(&fl4, msg);