ipv6: Optmize translation between IPV6_PREFER_SRC_xxx and RT6_LOOKUP_F_xxx.
IPV6_PREFER_SRC_xxx definitions:
| #define IPV6_PREFER_SRC_TMP 0x0001
| #define IPV6_PREFER_SRC_PUBLIC 0x0002
| #define IPV6_PREFER_SRC_COA 0x0004
RT6_LOOKUP_F_xxx definitions:
| #define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008
| #define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010
| #define RT6_LOOKUP_F_SRCPREF_COA 0x00000020
So, we can translate between these two groups by shift operation
instead of multiple 'if's.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index b08879e..52cd3ef 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -819,15 +819,8 @@
if (!ipv6_addr_any(&fl->fl6_src))
flags |= RT6_LOOKUP_F_HAS_SADDR;
- else if (sk) {
- unsigned int prefs = inet6_sk(sk)->srcprefs;
- if (prefs & IPV6_PREFER_SRC_TMP)
- flags |= RT6_LOOKUP_F_SRCPREF_TMP;
- if (prefs & IPV6_PREFER_SRC_PUBLIC)
- flags |= RT6_LOOKUP_F_SRCPREF_PUBLIC;
- if (prefs & IPV6_PREFER_SRC_COA)
- flags |= RT6_LOOKUP_F_SRCPREF_COA;
- }
+ else if (sk)
+ flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs);
return fib6_rule_lookup(net, fl, flags, ip6_pol_route_output);
}