diff options
author | Michael Wang <wangyun@linux.vnet.ibm.com> | 2012-08-22 19:59:57 +0000 |
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committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-09-03 13:52:44 +0200 |
commit | 2a6decfd8a5fae0422c98a22aa6bc30224b8a3ec (patch) | |
tree | 62c21cdac0ffeee0afe68b012350bb47e289b4d1 /net/netfilter/core.c | |
parent | 965505015beccc4ec900798070165875b8e8dccf (diff) | |
download | talos-obmc-linux-2a6decfd8a5fae0422c98a22aa6bc30224b8a3ec.tar.gz talos-obmc-linux-2a6decfd8a5fae0422c98a22aa6bc30224b8a3ec.zip |
netfilter: pass 'nf_hook_ops' instead of 'list_head' to nf_iterate()
Since 'list_for_each_continue_rcu' has already been replaced by
'list_for_each_entry_continue_rcu', pass 'list_head' to nf_iterate() as a
parameter can not benefit us any more.
This patch will replace 'list_head' with 'nf_hook_ops' as the parameter of
nf_iterate() to save code.
Signed-off-by: Michael Wang <wangyun@linux.vnet.ibm.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/core.c')
-rw-r--r-- | net/netfilter/core.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/net/netfilter/core.c b/net/netfilter/core.c index e61b3ac9591b..0b119d94c31a 100644 --- a/net/netfilter/core.c +++ b/net/netfilter/core.c @@ -126,42 +126,38 @@ unsigned int nf_iterate(struct list_head *head, unsigned int hook, const struct net_device *indev, const struct net_device *outdev, - struct list_head **i, + struct nf_hook_ops **elemp, int (*okfn)(struct sk_buff *), int hook_thresh) { unsigned int verdict; - struct nf_hook_ops *elem = list_entry_rcu(*i, struct nf_hook_ops, list); /* * The caller must not block between calls to this * function because of risk of continuing from deleted element. */ - list_for_each_entry_continue_rcu(elem, head, list) { - if (hook_thresh > elem->priority) + list_for_each_entry_continue_rcu((*elemp), head, list) { + if (hook_thresh > (*elemp)->priority) continue; /* Optimization: we don't need to hold module reference here, since function can't sleep. --RR */ repeat: - verdict = elem->hook(hook, skb, indev, outdev, okfn); + verdict = (*elemp)->hook(hook, skb, indev, outdev, okfn); if (verdict != NF_ACCEPT) { #ifdef CONFIG_NETFILTER_DEBUG if (unlikely((verdict & NF_VERDICT_MASK) > NF_MAX_VERDICT)) { NFDEBUG("Evil return from %p(%u).\n", - elem->hook, hook); + (*elemp)->hook, hook); continue; } #endif - if (verdict != NF_REPEAT) { - *i = &elem->list; + if (verdict != NF_REPEAT) return verdict; - } goto repeat; } } - *i = &elem->list; return NF_ACCEPT; } @@ -174,14 +170,14 @@ int nf_hook_slow(u_int8_t pf, unsigned int hook, struct sk_buff *skb, int (*okfn)(struct sk_buff *), int hook_thresh) { - struct list_head *elem; + struct nf_hook_ops *elem; unsigned int verdict; int ret = 0; /* We may already have this, but read-locks nest anyway */ rcu_read_lock(); - elem = &nf_hooks[pf][hook]; + elem = list_entry_rcu(&nf_hooks[pf][hook], struct nf_hook_ops, list); next_hook: verdict = nf_iterate(&nf_hooks[pf][hook], skb, hook, indev, outdev, &elem, okfn, hook_thresh); @@ -193,8 +189,8 @@ next_hook: if (ret == 0) ret = -EPERM; } else if ((verdict & NF_VERDICT_MASK) == NF_QUEUE) { - int err = nf_queue(skb, elem, pf, hook, indev, outdev, okfn, - verdict >> NF_VERDICT_QBITS); + int err = nf_queue(skb, &elem->list, pf, hook, indev, outdev, + okfn, verdict >> NF_VERDICT_QBITS); if (err < 0) { if (err == -ECANCELED) goto next_hook; |