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[IPV4]: Add 'rtable' field in struct sk_buff to alias 'dst' and avoid casts

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(Anonymous) unions can help us to avoid ugly casts.

A common cast it the (struct rtable *)skb->dst one.

Defining an union like  :
union {
     struct dst_entry *dst;
     struct rtable *rtable;
};
permits to use skb->rtable in place.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2008-03-05 18:30:47 -08:00
committed by David S. Miller
parent a05c44f6d5
commit ee6b967301
23 changed files with 69 additions and 68 deletions
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6
net/ipv4/ipmr.c
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@@ -1283,7 +1283,7 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local
if (vif_table[vif].dev != skb->dev) {
int true_vifi;
if (((struct rtable*)skb->dst)->fl.iif == 0) {
if (skb->rtable->fl.iif == 0) {
/* It is our own packet, looped back.
Very complicated situation...
@@ -1357,7 +1357,7 @@ dont_forward:
int ip_mr_input(struct sk_buff *skb)
{
struct mfc_cache *cache;
int local = ((struct rtable*)skb->dst)->rt_flags&RTCF_LOCAL;
int local = skb->rtable->rt_flags&RTCF_LOCAL;
/* Packet is looped back after forward, it should not be
forwarded second time, but still can be delivered locally.
@@ -1594,7 +1594,7 @@ int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait)
{
int err;
struct mfc_cache *cache;
struct rtable *rt = (struct rtable*)skb->dst;
struct rtable *rt = skb->rtable;
read_lock(&mrt_lock);
cache = ipmr_cache_find(rt->rt_src, rt->rt_dst);