[PATCH] allow DSCP values in ip rulesB

[Pavel Balaev <mail@void.so>]

Hello, for now IP rules supports only old TOS values and we cannot use
DSCP.

This patch adds support for DSCP values in IP rules:

$ ip r add default via 192.168.0.6 table test
$ ip ru add tos 0x80 table test
$ ip ru
0:	from all lookup local 
32764:	from all tos CS4 lookup test 
32766:	from all lookup main 
32767:	from all lookup default 
$ ip r get fibmatch 8.8.8.9 tos 0x80
default tos CS4 via 192.168.0.6 dev lan table test

Signed-off-by: Pavel Balaev <mail@void.so>
---
 net/ipv4/fib_rules.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index f8eb78d0..7a6c5bfe 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -220,7 +220,7 @@ static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 	int err = -EINVAL;
 	struct fib4_rule *rule4 = (struct fib4_rule *) rule;
 
-	if (frh->tos & ~IPTOS_TOS_MASK) {
+	if (frh->tos & ~(IPTOS_TOS_MASK | IPTOS_PREC_MASK)) {
 		NL_SET_ERR_MSG(extack, "Invalid tos");
 		goto errout;
 	}
-- 
2.18.1