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netfilter: convert while loops to for loops 

This is to facilitate converting from a singly-linked list to an array
of elements.

Signed-off-by: Aaron Conole <aconole@bytheb.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Aaron Conole 2016-11-15 17:48:46 -05:00 committed by Pablo Neira Ayuso
parent d415b9eb76
commit 679972f3be
2 changed files with 6 additions and 8 deletions
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8
net/bridge/br_netfilter_hooks.c
View File

@ -1008,10 +1008,10 @@ int br_nf_hook_thresh(unsigned int hook, struct net *net,
struct nf_hook_state state;
int ret;
elem = rcu_dereference(net->nf.hooks[NFPROTO_BRIDGE][hook]);
while (elem && (nf_hook_entry_priority(elem) <= NF_BR_PRI_BRNF))
elem = rcu_dereference(elem->next);
for (elem = rcu_dereference(net->nf.hooks[NFPROTO_BRIDGE][hook]);
elem && nf_hook_entry_priority(elem) <= NF_BR_PRI_BRNF;
elem = rcu_dereference(elem->next))
;
if (!elem)
return okfn(net, sk, skb);

6
net/netfilter/core.c
View File

@ -107,10 +107,9 @@ int nf_register_net_hook(struct net *net, const struct nf_hook_ops *reg)
mutex_lock(&nf_hook_mutex);
/* Find the spot in the list */
while ((p = nf_entry_dereference(*pp)) != NULL) {
for (; (p = nf_entry_dereference(*pp)) != NULL; pp = &p->next) {
if (reg->priority < nf_hook_entry_priority(p))
break;
pp = &p->next;
}
rcu_assign_pointer(entry->next, p);
rcu_assign_pointer(*pp, entry);
@ -137,12 +136,11 @@ void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg)
return;
mutex_lock(&nf_hook_mutex);
while ((p = nf_entry_dereference(*pp)) != NULL) {
for (; (p = nf_entry_dereference(*pp)) != NULL; pp = &p->next) {
if (nf_hook_entry_ops(p) == reg) {
rcu_assign_pointer(*pp, p->next);
break;
}
pp = &p->next;
}
mutex_unlock(&nf_hook_mutex);
if (!p) {