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[NETFILTER]: nf_conntrack: change nf_conntrack_l[34]proto_unregister to void 

No caller checks the return value, and since its usually called within the
module unload path there's nothing a module could do about errors anyway,
so BUG on invalid conditions and return void.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-02-12 11:14:28 -08:00 committed by David S. Miller
parent 982d9a9ce3
commit fe3eb20c1a
3 changed files with 9 additions and 35 deletions
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2
include/net/netfilter/nf_conntrack_l3proto.h
View File

@ -89,7 +89,7 @@ extern struct nf_conntrack_l3proto *nf_ct_l3protos[AF_MAX];
/* Protocol registration. */
extern int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto);
extern int nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto);
extern void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto);
extern struct nf_conntrack_l3proto *
nf_ct_l3proto_find_get(u_int16_t l3proto);

2
include/net/netfilter/nf_conntrack_l4proto.h
View File

@ -109,7 +109,7 @@ extern void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p);
/* Protocol registration. */
extern int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *proto);
extern int nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *proto);
extern void nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *proto);
/* Generic netlink helpers */
extern int nf_ct_port_tuple_to_nfattr(struct sk_buff *skb,

40
net/netfilter/nf_conntrack_proto.c
View File

@ -215,22 +215,12 @@ int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto)
}
EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_register);
int nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto)
void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto)
{
int ret = 0;
if (proto->l3proto >= AF_MAX) {
ret = -EBUSY;
goto out;
}
BUG_ON(proto->l3proto >= AF_MAX);
write_lock_bh(&nf_conntrack_lock);
if (nf_ct_l3protos[proto->l3proto] != proto) {
write_unlock_bh(&nf_conntrack_lock);
ret = -EBUSY;
goto out;
}
BUG_ON(nf_ct_l3protos[proto->l3proto] != proto);
rcu_assign_pointer(nf_ct_l3protos[proto->l3proto],
&nf_conntrack_l3proto_generic);
write_unlock_bh(&nf_conntrack_lock);
@ -240,9 +230,6 @@ int nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto)
/* Remove all contrack entries for this protocol */
nf_ct_iterate_cleanup(kill_l3proto, proto);
out:
return ret;
}
EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_unregister);
@ -368,27 +355,17 @@ int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *l4proto)
}
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_register);
int nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *l4proto)
void nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *l4proto)
{
int ret = 0;
if (l4proto->l3proto >= PF_MAX) {
ret = -EBUSY;
goto out;
}
BUG_ON(l4proto->l3proto >= PF_MAX);
if (l4proto == &nf_conntrack_l4proto_generic) {
nf_ct_l4proto_unregister_sysctl(l4proto);
goto out;
return;
}
write_lock_bh(&nf_conntrack_lock);
if (nf_ct_protos[l4proto->l3proto][l4proto->l4proto]
!= l4proto) {
write_unlock_bh(&nf_conntrack_lock);
ret = -EBUSY;
goto out;
}
BUG_ON(nf_ct_protos[l4proto->l3proto][l4proto->l4proto] != l4proto);
rcu_assign_pointer(nf_ct_protos[l4proto->l3proto][l4proto->l4proto],
&nf_conntrack_l4proto_generic);
write_unlock_bh(&nf_conntrack_lock);
@ -398,8 +375,5 @@ int nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *l4proto)
/* Remove all contrack entries for this protocol */
nf_ct_iterate_cleanup(kill_l4proto, l4proto);
out:
return ret;
}
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_unregister);