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authorEric Dumazet <eric.dumazet@gmail.com>2009-06-02 05:14:27 +0000
committerDavid S. Miller <davem@davemloft.net>2009-06-03 02:51:02 -0700
commit511c3f92ad5b6d9f8f6464be1b4f85f0422be91a (patch)
tree3e368d9a78f87eb9dd7ff9e57f4aab3f4a96e3b1 /net/ipv4/route.c
parentdfbf97f3ac980b69dfbc41c83a208211a38443e8 (diff)
net: skb->rtable accessor
Define skb_rtable(const struct sk_buff *skb) accessor to get rtable from skb Delete skb->rtable field Setting rtable is not allowed, just set dst instead as rtable is an alias. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/route.c')
-rw-r--r--net/ipv4/route.c37
1 files changed, 22 insertions, 15 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 28205e5bfa9..f20060ac2f0 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1064,7 +1064,8 @@ work_done:
out: return 0;
}
-static int rt_intern_hash(unsigned hash, struct rtable *rt, struct rtable **rp)
+static int rt_intern_hash(unsigned hash, struct rtable *rt,
+ struct rtable **rp, struct sk_buff *skb)
{
struct rtable *rth, **rthp;
unsigned long now;
@@ -1114,7 +1115,10 @@ restart:
spin_unlock_bh(rt_hash_lock_addr(hash));
rt_drop(rt);
- *rp = rth;
+ if (rp)
+ *rp = rth;
+ else
+ skb->dst = &rth->u.dst;
return 0;
}
@@ -1210,7 +1214,10 @@ restart:
rcu_assign_pointer(rt_hash_table[hash].chain, rt);
spin_unlock_bh(rt_hash_lock_addr(hash));
- *rp = rt;
+ if (rp)
+ *rp = rt;
+ else
+ skb->dst = &rt->u.dst;
return 0;
}
@@ -1407,7 +1414,7 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
&netevent);
rt_del(hash, rth);
- if (!rt_intern_hash(hash, rt, &rt))
+ if (!rt_intern_hash(hash, rt, &rt, NULL))
ip_rt_put(rt);
goto do_next;
}
@@ -1473,7 +1480,7 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst)
void ip_rt_send_redirect(struct sk_buff *skb)
{
- struct rtable *rt = skb->rtable;
+ struct rtable *rt = skb_rtable(skb);
struct in_device *in_dev = in_dev_get(rt->u.dst.dev);
if (!in_dev)
@@ -1521,7 +1528,7 @@ out:
static int ip_error(struct sk_buff *skb)
{
- struct rtable *rt = skb->rtable;
+ struct rtable *rt = skb_rtable(skb);
unsigned long now;
int code;
@@ -1698,7 +1705,7 @@ static void ipv4_link_failure(struct sk_buff *skb)
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0);
- rt = skb->rtable;
+ rt = skb_rtable(skb);
if (rt)
dst_set_expires(&rt->u.dst, 0);
}
@@ -1858,7 +1865,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
in_dev_put(in_dev);
hash = rt_hash(daddr, saddr, dev->ifindex, rt_genid(dev_net(dev)));
- return rt_intern_hash(hash, rth, &skb->rtable);
+ return rt_intern_hash(hash, rth, NULL, skb);
e_nobufs:
in_dev_put(in_dev);
@@ -2019,7 +2026,7 @@ static int ip_mkroute_input(struct sk_buff *skb,
/* put it into the cache */
hash = rt_hash(daddr, saddr, fl->iif,
rt_genid(dev_net(rth->u.dst.dev)));
- return rt_intern_hash(hash, rth, &skb->rtable);
+ return rt_intern_hash(hash, rth, NULL, skb);
}
/*
@@ -2175,7 +2182,7 @@ local_input:
}
rth->rt_type = res.type;
hash = rt_hash(daddr, saddr, fl.iif, rt_genid(net));
- err = rt_intern_hash(hash, rth, &skb->rtable);
+ err = rt_intern_hash(hash, rth, NULL, skb);
goto done;
no_route:
@@ -2244,7 +2251,7 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
dst_use(&rth->u.dst, jiffies);
RT_CACHE_STAT_INC(in_hit);
rcu_read_unlock();
- skb->rtable = rth;
+ skb->dst = &rth->u.dst;
return 0;
}
RT_CACHE_STAT_INC(in_hlist_search);
@@ -2420,7 +2427,7 @@ static int ip_mkroute_output(struct rtable **rp,
if (err == 0) {
hash = rt_hash(oldflp->fl4_dst, oldflp->fl4_src, oldflp->oif,
rt_genid(dev_net(dev_out)));
- err = rt_intern_hash(hash, rth, rp);
+ err = rt_intern_hash(hash, rth, rp, NULL);
}
return err;
@@ -2763,7 +2770,7 @@ static int rt_fill_info(struct net *net,
struct sk_buff *skb, u32 pid, u32 seq, int event,
int nowait, unsigned int flags)
{
- struct rtable *rt = skb->rtable;
+ struct rtable *rt = skb_rtable(skb);
struct rtmsg *r;
struct nlmsghdr *nlh;
long expires;
@@ -2907,7 +2914,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
err = ip_route_input(skb, dst, src, rtm->rtm_tos, dev);
local_bh_enable();
- rt = skb->rtable;
+ rt = skb_rtable(skb);
if (err == 0 && rt->u.dst.error)
err = -rt->u.dst.error;
} else {
@@ -2927,7 +2934,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
if (err)
goto errout_free;
- skb->rtable = rt;
+ skb->dst = &rt->u.dst;
if (rtm->rtm_flags & RTM_F_NOTIFY)
rt->rt_flags |= RTCF_NOTIFY;