From fb9de91ea8035b99757d9f8a04aa058c982c361b Mon Sep 17 00:00:00 2001 From: YOSHIFUJI Hideaki Date: Mon, 20 Mar 2006 16:59:08 -0800 Subject: [PATCH] [IPV6]: ROUTE: Clean up reference counting / unlocking for returning object. Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller --- net/ipv6/route.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 1a326af18f28..cd60bcca1064 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -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) { \ while ((fn = fn->parent) != NULL) { \ if (fn->fn_flags & RTN_ROOT) { \ - dst_hold(&rt->u.dst); \ goto out; \ } \ if (fn->fn_flags & RTN_RTINFO) \ @@ -508,17 +507,17 @@ void ip6_route_input(struct sk_buff *skb) if ((rt->rt6i_flags & RTF_CACHE)) { rt = rt6_device_match(rt, skb->dev->ifindex, strict); BACKTRACK(); - dst_hold(&rt->u.dst); goto out; } rt = rt6_device_match(rt, skb->dev->ifindex, strict); BACKTRACK(); + dst_hold(&rt->u.dst); + read_unlock_bh(&rt6_lock); + if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) { struct rt6_info *nrt; - dst_hold(&rt->u.dst); - read_unlock_bh(&rt6_lock); nrt = rt6_cow(rt, &skb->nh.ipv6h->daddr, &skb->nh.ipv6h->saddr, @@ -536,14 +535,16 @@ void ip6_route_input(struct sk_buff *skb) dst_release(&rt->u.dst); goto relookup; } - dst_hold(&rt->u.dst); -out: - read_unlock_bh(&rt6_lock); out2: rt->u.dst.lastuse = jiffies; rt->u.dst.__use++; 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) @@ -566,7 +567,6 @@ struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl) if ((rt->rt6i_flags & RTF_CACHE)) { rt = rt6_device_match(rt, fl->oif, strict); BACKTRACK(); - dst_hold(&rt->u.dst); goto out; } if (rt->rt6i_flags & RTF_DEFAULT) { @@ -577,10 +577,11 @@ struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl) BACKTRACK(); } + dst_hold(&rt->u.dst); + read_unlock_bh(&rt6_lock); + if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) { struct rt6_info *nrt; - dst_hold(&rt->u.dst); - read_unlock_bh(&rt6_lock); nrt = rt6_cow(rt, &fl->fl6_dst, &fl->fl6_src, NULL); @@ -596,14 +597,14 @@ struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl) dst_release(&rt->u.dst); goto relookup; } - dst_hold(&rt->u.dst); - -out: - read_unlock_bh(&rt6_lock); out2: rt->u.dst.lastuse = jiffies; rt->u.dst.__use++; return &rt->u.dst; +out: + dst_hold(&rt->u.dst); + read_unlock_bh(&rt6_lock); + goto out2; } -- GitLab