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linux-sg2042
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[IPV6]: ROUTE: Clean up reference counting / unlocking for returning object. 

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2006-03-20 16:59:08 -08:00 committed by David S. Miller
parent d5315b500b
commit fb9de91ea8
1 changed files with 15 additions and 14 deletions
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29
net/ipv6/route.c
View File

@ -478,7 +478,6 @@ static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *d
if (rt == &ip6_null_entry && strict) { \ if (rt == &ip6_null_entry && strict) { \
while ((fn = fn->parent) != NULL) { \ while ((fn = fn->parent) != NULL) { \
if (fn->fn_flags & RTN_ROOT) { \ if (fn->fn_flags & RTN_ROOT) { \
dst_hold(&rt->u.dst); \
goto out; \ goto out; \
} \ } \
if (fn->fn_flags & RTN_RTINFO) \ if (fn->fn_flags & RTN_RTINFO) \
@ -508,18 +507,18 @@ restart:
if ((rt->rt6i_flags & RTF_CACHE)) { if ((rt->rt6i_flags & RTF_CACHE)) {
rt = rt6_device_match(rt, skb->dev->ifindex, strict); rt = rt6_device_match(rt, skb->dev->ifindex, strict);
BACKTRACK(); BACKTRACK();
dst_hold(&rt->u.dst);
goto out; goto out;
} }
rt = rt6_device_match(rt, skb->dev->ifindex, strict); rt = rt6_device_match(rt, skb->dev->ifindex, strict);
BACKTRACK(); BACKTRACK();
if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {
struct rt6_info *nrt;
dst_hold(&rt->u.dst); dst_hold(&rt->u.dst);
read_unlock_bh(&rt6_lock); read_unlock_bh(&rt6_lock);
if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {
struct rt6_info *nrt;
nrt = rt6_cow(rt, &skb->nh.ipv6h->daddr, nrt = rt6_cow(rt, &skb->nh.ipv6h->daddr,
&skb->nh.ipv6h->saddr, &skb->nh.ipv6h->saddr,
&NETLINK_CB(skb)); &NETLINK_CB(skb));
@ -536,14 +535,16 @@ restart:
dst_release(&rt->u.dst); dst_release(&rt->u.dst);
goto relookup; goto relookup;
} }
dst_hold(&rt->u.dst);
out:
read_unlock_bh(&rt6_lock);
out2: out2:
rt->u.dst.lastuse = jiffies; rt->u.dst.lastuse = jiffies;
rt->u.dst.__use++; rt->u.dst.__use++;
skb->dst = (struct dst_entry *) rt; skb->dst = (struct dst_entry *) rt;
return;
out:
dst_hold(&rt->u.dst);
read_unlock_bh(&rt6_lock);
goto out2;
} }
struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl) struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl)
@ -566,7 +567,6 @@ restart:
if ((rt->rt6i_flags & RTF_CACHE)) { if ((rt->rt6i_flags & RTF_CACHE)) {
rt = rt6_device_match(rt, fl->oif, strict); rt = rt6_device_match(rt, fl->oif, strict);
BACKTRACK(); BACKTRACK();
dst_hold(&rt->u.dst);
goto out; goto out;
} }
if (rt->rt6i_flags & RTF_DEFAULT) { if (rt->rt6i_flags & RTF_DEFAULT) {
@ -577,11 +577,12 @@ restart:
BACKTRACK(); BACKTRACK();
} }
if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {
struct rt6_info *nrt;
dst_hold(&rt->u.dst); dst_hold(&rt->u.dst);
read_unlock_bh(&rt6_lock); read_unlock_bh(&rt6_lock);
if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {
struct rt6_info *nrt;
nrt = rt6_cow(rt, &fl->fl6_dst, &fl->fl6_src, NULL); nrt = rt6_cow(rt, &fl->fl6_dst, &fl->fl6_src, NULL);
dst_release(&rt->u.dst); dst_release(&rt->u.dst);
@ -596,14 +597,14 @@ restart:
dst_release(&rt->u.dst); dst_release(&rt->u.dst);
goto relookup; goto relookup;
} }
dst_hold(&rt->u.dst);
out:
read_unlock_bh(&rt6_lock);
out2: out2:
rt->u.dst.lastuse = jiffies; rt->u.dst.lastuse = jiffies;
rt->u.dst.__use++; rt->u.dst.__use++;
return &rt->u.dst; return &rt->u.dst;
out:
dst_hold(&rt->u.dst);
read_unlock_bh(&rt6_lock);
goto out2;
} }