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ipv4: Change rt->rt_iif encoding.

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On input packet processing, rt->rt_iif will be zero if we should
use skb->dev->ifindex.

Since we access rt->rt_iif consistently via inet_iif(), that is
the only spot whose interpretation have to adjust.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-07-23 13:57:45 -07:00
parent b68581778c
commit 13378cad02
2 changed files with 9 additions and 5 deletions
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6
include/net/route.h
View File

@ -277,7 +277,11 @@ static inline struct rtable *ip_route_newports(struct flowi4 *fl4, struct rtable
static inline int inet_iif(const struct sk_buff *skb)
{
return skb_rtable(skb)->rt_iif;
int iif = skb_rtable(skb)->rt_iif;
if (iif)
return iif;
return skb->skb_iif;
}
extern int sysctl_ip_default_ttl;

8
net/ipv4/route.c
View File

@ -1309,7 +1309,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
rth->rt_flags = RTCF_MULTICAST;
rth->rt_type = RTN_MULTICAST;
rth->rt_is_input= 1;
rth->rt_iif = dev->ifindex;
rth->rt_iif = 0;
rth->rt_pmtu = 0;
rth->rt_gateway = 0;
if (our) {
@ -1435,7 +1435,7 @@ static int __mkroute_input(struct sk_buff *skb,
rth->rt_flags = flags;
rth->rt_type = res->type;
rth->rt_is_input = 1;
rth->rt_iif = in_dev->dev->ifindex;
rth->rt_iif = 0;
rth->rt_pmtu = 0;
rth->rt_gateway = 0;
@ -1608,7 +1608,7 @@ local_input:
rth->rt_flags = flags|RTCF_LOCAL;
rth->rt_type = res.type;
rth->rt_is_input = 1;
rth->rt_iif = dev->ifindex;
rth->rt_iif = 0;
rth->rt_pmtu = 0;
rth->rt_gateway = 0;
if (res.type == RTN_UNREACHABLE) {
@ -1772,7 +1772,7 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
rth->rt_flags = flags;
rth->rt_type = type;
rth->rt_is_input = 0;
rth->rt_iif = orig_oif ? : dev_out->ifindex;
rth->rt_iif = orig_oif ? : 0;
rth->rt_pmtu = 0;
rth->rt_gateway = 0;