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ipv6: Normalize arguments to ip6_dst_blackhole(). 

Return a dst pointer which is potentitally error encoded.

Don't pass original dst pointer by reference, pass a struct net
instead of a socket, and elide the flow argument since it is
unnecessary.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2011-03-01 14:45:33 -08:00
parent 80c0bc9e37
commit 69ead7afdf
3 changed files with 9 additions and 12 deletions
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5
include/net/ipv6.h
View File

@ -520,9 +520,8 @@ extern struct dst_entry * ip6_sk_dst_lookup_flow(struct sock *sk,
struct flowi *fl,
const struct in6_addr *final_dst,
bool can_sleep);
extern int ip6_dst_blackhole(struct sock *sk,
struct dst_entry **dst,
struct flowi *fl);
extern struct dst_entry * ip6_dst_blackhole(struct net *net,
struct dst_entry *orig_dst);
/*
* skb processing functions

4
net/ipv6/ip6_output.c
View File

@ -1029,7 +1029,7 @@ struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi *fl,
fl->flags |= FLOWI_FLAG_CAN_SLEEP;
err = __xfrm_lookup(sock_net(sk), &dst, fl, sk, 0);
if (err == -EREMOTE)
err = ip6_dst_blackhole(sk, &dst, fl);
return ip6_dst_blackhole(sock_net(sk), dst);
if (err)
return ERR_PTR(err);
} else {
@ -1074,7 +1074,7 @@ struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi *fl,
fl->flags |= FLOWI_FLAG_CAN_SLEEP;
err = __xfrm_lookup(sock_net(sk), &dst, fl, sk, 0);
if (err == -EREMOTE)
err = ip6_dst_blackhole(sk, &dst, fl);
return ip6_dst_blackhole(sock_net(sk), dst);
if (err)
return ERR_PTR(err);
} else {

12
net/ipv6/route.c
View File

@ -870,11 +870,10 @@ struct dst_entry * ip6_route_output(struct net *net, struct sock *sk,
EXPORT_SYMBOL(ip6_route_output);
int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dstp, struct flowi *fl)
struct dst_entry *ip6_dst_blackhole(struct net *net, struct dst_entry *dst_orig)
{
struct rt6_info *ort = (struct rt6_info *) *dstp;
struct rt6_info *rt = (struct rt6_info *)
dst_alloc(&ip6_dst_blackhole_ops, 1);
struct rt6_info *rt = dst_alloc(&ip6_dst_blackhole_ops, 1);
struct rt6_info *ort = (struct rt6_info *) dst_orig;
struct dst_entry *new = NULL;
if (rt) {
@ -905,9 +904,8 @@ int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dstp, struct flowi *fl
dst_free(new);
}
dst_release(*dstp);
*dstp = new;
return new ? 0 : -ENOMEM;
dst_release(dst_orig);
return new ? new : ERR_PTR(-ENOMEM);
}
EXPORT_SYMBOL_GPL(ip6_dst_blackhole);