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netfilter: ctnetlink: remove remaining module refcounting 

Convert the remaining refcount users.

As pointed out by Patrick McHardy, the protocols can be accessed safely using RCU.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Florian Westphal 2009-03-18 17:28:37 +01:00 committed by Patrick McHardy
parent 0269ea4937
commit cd91566e4b
1 changed files with 9 additions and 6 deletions
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15
net/netfilter/nf_conntrack_netlink.c
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@ -599,7 +599,8 @@ ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
rcu_read_lock();
l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
if (likely(l3proto->nlattr_to_tuple)) {
ret = nla_validate_nested(attr, CTA_IP_MAX,
@ -608,7 +609,7 @@ ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
ret = l3proto->nlattr_to_tuple(tb, tuple);
}
nf_ct_l3proto_put(l3proto);
rcu_read_unlock();
return ret;
}
@ -633,7 +634,8 @@ ctnetlink_parse_tuple_proto(struct nlattr *attr,
return -EINVAL;
tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum);
rcu_read_lock();
l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
if (likely(l4proto->nlattr_to_tuple)) {
ret = nla_validate_nested(attr, CTA_PROTO_MAX,
@ -642,7 +644,7 @@ ctnetlink_parse_tuple_proto(struct nlattr *attr,
ret = l4proto->nlattr_to_tuple(tb, tuple);
}
nf_ct_l4proto_put(l4proto);
rcu_read_unlock();
return ret;
}
@ -989,10 +991,11 @@ ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[])
nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL);
l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct));
rcu_read_lock();
l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
if (l4proto->from_nlattr)
err = l4proto->from_nlattr(tb, ct);
nf_ct_l4proto_put(l4proto);
rcu_read_unlock();
return err;
}