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netfilter: introduce nf_conntrack_helper_put helper function

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And convert module_put invocation to nf_conntrack_helper_put, this is
prepared for the followup patch, which will add a refcnt for cthelper,
so we can reject the deleting request when cthelper is in use.

Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Liping Zhang 2017-05-07 22:01:55 +08:00 • committed by Pablo Neira Ayuso
parent d110a3942a
commit d91fc59cd7
5 changed files with 15 additions and 7 deletions
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4
net/openvswitch/conntrack.c
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@ -1123,7 +1123,7 @@ static int ovs_ct_add_helper(struct ovs_conntrack_info *info, const char *name,
help = nf_ct_helper_ext_add(info->ct, helper, GFP_KERNEL);
if (!help) {
module_put(helper->me);
nf_conntrack_helper_put(helper);
return -ENOMEM;
}
@ -1584,7 +1584,7 @@ void ovs_ct_free_action(const struct nlattr *a)
static void __ovs_ct_free_action(struct ovs_conntrack_info *ct_info)
{
if (ct_info->helper)
module_put(ct_info->helper->me);
nf_conntrack_helper_put(ct_info->helper);
if (ct_info->ct)
nf_ct_tmpl_free(ct_info->ct);
}