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[NETFILTER]: nf_queue: remove unnecessary hook existance check 

We hold a module reference for each queued packet, so the hook that
queued the packet can't disappear. Also remove an obsolete  comment
stating the opposite.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-12-05 01:23:41 -08:00 committed by David S. Miller
parent 8b1cf0db2a
commit fb46990dba
2 changed files with 0 additions and 18 deletions
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5
net/netfilter/core.c
View File

@ -51,11 +51,6 @@ void nf_unregister_afinfo(struct nf_afinfo *afinfo)
}
EXPORT_SYMBOL_GPL(nf_unregister_afinfo);
/* In this code, we can be waiting indefinitely for userspace to
* service a packet if a hook returns NF_QUEUE. We could keep a count
* of skbuffs queued for userspace, and not deregister a hook unless
* this is zero, but that sucks. Now, we simply check when the
* packets come back: if the hook is gone, the packet is discarded. */
struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS] __read_mostly;
EXPORT_SYMBOL(nf_hooks);
static DEFINE_MUTEX(nf_hook_mutex);

13
net/netfilter/nf_queue.c
View File

@ -223,7 +223,6 @@ void nf_reinject(struct sk_buff *skb, struct nf_info *info,
unsigned int verdict)
{
struct list_head *elem = &info->elem->list;
struct list_head *i;
struct nf_afinfo *afinfo;
rcu_read_lock();
@ -245,18 +244,6 @@ void nf_reinject(struct sk_buff *skb, struct nf_info *info,
/* Drop reference to owner of hook which queued us. */
module_put(info->elem->owner);
list_for_each_rcu(i, &nf_hooks[info->pf][info->hook]) {
if (i == elem)
break;
}
if (i == &nf_hooks[info->pf][info->hook]) {
/* The module which sent it to userspace is gone. */
NFDEBUG("%s: module disappeared, dropping packet.\n",
__FUNCTION__);
verdict = NF_DROP;
}
/* Continue traversal iff userspace said ok... */
if (verdict == NF_REPEAT) {
elem = elem->prev;