diff options
| author | Steve French <sfrench@us.ibm.com> | 2008-08-26 16:56:05 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2008-08-26 16:56:05 +0000 |
| commit | 3dae49abef945c55c10fa7c479cfd8fd13af55db (patch) | |
| tree | 487c47c6d23cc28a259b913396aeaff0b792d32d /net/ipv4/icmp.c | |
| parent | 6ce5eecb9cd3ac97b952c50309b87c31488a45e9 (diff) | |
| parent | b8e6c91c74e9f0279b7c51048779b3d62da60b88 (diff) | |
Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'net/ipv4/icmp.c')
| -rw-r--r-- | net/ipv4/icmp.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 860558633b2c..55c355e63234 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -204,18 +204,22 @@ static struct sock *icmp_sk(struct net *net) return net->ipv4.icmp_sk[smp_processor_id()]; } -static inline int icmp_xmit_lock(struct sock *sk) +static inline struct sock *icmp_xmit_lock(struct net *net) { + struct sock *sk; + local_bh_disable(); + sk = icmp_sk(net); + if (unlikely(!spin_trylock(&sk->sk_lock.slock))) { /* This can happen if the output path signals a * dst_link_failure() for an outgoing ICMP packet. */ local_bh_enable(); - return 1; + return NULL; } - return 0; + return sk; } static inline void icmp_xmit_unlock(struct sock *sk) @@ -354,15 +358,17 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb) struct ipcm_cookie ipc; struct rtable *rt = skb->rtable; struct net *net = dev_net(rt->u.dst.dev); - struct sock *sk = icmp_sk(net); - struct inet_sock *inet = inet_sk(sk); + struct sock *sk; + struct inet_sock *inet; __be32 daddr; if (ip_options_echo(&icmp_param->replyopts, skb)) return; - if (icmp_xmit_lock(sk)) + sk = icmp_xmit_lock(net); + if (sk == NULL) return; + inet = inet_sk(sk); icmp_param->data.icmph.checksum = 0; @@ -419,7 +425,6 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info) if (!rt) goto out; net = dev_net(rt->u.dst.dev); - sk = icmp_sk(net); /* * Find the original header. It is expected to be valid, of course. @@ -483,7 +488,8 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info) } } - if (icmp_xmit_lock(sk)) + sk = icmp_xmit_lock(net); + if (sk == NULL) return; /* |