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netfilter: nf_conntrack: refactor l3proto support for netns

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Move the code that register/unregister l3proto to the
module_init/exit context.

Given that we have to modify some interfaces to accomodate
these changes, it is a good time to use shorter function names
for this using the nf_ct_* prefix instead of nf_conntrack_*,
that is:

nf_ct_l3proto_register
nf_ct_l3proto_pernet_register
nf_ct_l3proto_unregister
nf_ct_l3proto_pernet_unregister

We same many line breaks with it.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Gao feng 2013-01-21 22:10:33 +00:00 committed by Pablo Neira Ayuso
parent 04d8700179
commit 6330750d56
4 changed files with 49 additions and 41 deletions
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11
include/net/netfilter/nf_conntrack_l3proto.h
View file

@ -76,11 +76,16 @@ struct nf_conntrack_l3proto {
extern struct nf_conntrack_l3proto __rcu *nf_ct_l3protos[AF_MAX];
/* Protocol registration. */
extern int nf_conntrack_l3proto_register(struct net *net,
/* Protocol pernet registration. */
extern int nf_ct_l3proto_pernet_register(struct net *net,
struct nf_conntrack_l3proto *proto);
extern void nf_conntrack_l3proto_unregister(struct net *net,
extern void nf_ct_l3proto_pernet_unregister(struct net *net,
struct nf_conntrack_l3proto *proto);
/* Protocol global registration. */
extern int nf_ct_l3proto_register(struct nf_conntrack_l3proto *proto);
extern void nf_ct_l3proto_unregister(struct nf_conntrack_l3proto *proto);
extern struct nf_conntrack_l3proto *nf_ct_l3proto_find_get(u_int16_t l3proto);
extern void nf_ct_l3proto_put(struct nf_conntrack_l3proto *p);

22
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
View file

@ -438,10 +438,9 @@ static int ipv4_net_init(struct net *net)
pr_err("nf_conntrack_l4proto_icmp4 :protocol register failed\n");
goto out_icmp;
}
ret = nf_conntrack_l3proto_register(net,
&nf_conntrack_l3proto_ipv4);
ret = nf_ct_l3proto_pernet_register(net, &nf_conntrack_l3proto_ipv4);
if (ret < 0) {
pr_err("nf_conntrack_l3proto_ipv4 :protocol register failed\n");
pr_err("nf_conntrack_ipv4: pernet registration failed\n");
goto out_ipv4;
}
return 0;
@ -460,8 +459,7 @@ out_tcp:
static void ipv4_net_exit(struct net *net)
{
nf_conntrack_l3proto_unregister(net,
&nf_conntrack_l3proto_ipv4);
nf_ct_l3proto_pernet_unregister(net, &nf_conntrack_l3proto_ipv4);
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_icmp);
nf_conntrack_l4proto_unregister(net,
@ -500,16 +498,25 @@ static int __init nf_conntrack_l3proto_ipv4_init(void)
pr_err("nf_conntrack_ipv4: can't register hooks.\n");
goto cleanup_pernet;
}
ret = nf_ct_l3proto_register(&nf_conntrack_l3proto_ipv4);
if (ret < 0) {
pr_err("nf_conntrack_ipv4: can't register ipv4 proto.\n");
goto cleanup_hooks;
}
#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
ret = nf_conntrack_ipv4_compat_init();
if (ret < 0)
goto cleanup_hooks;
goto cleanup_proto;
#endif
return ret;
#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
cleanup_proto:
nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv4);
#endif
cleanup_hooks:
nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops));
#endif
cleanup_pernet:
unregister_pernet_subsys(&ipv4_net_ops);
cleanup_sockopt:
@ -523,6 +530,7 @@ static void __exit nf_conntrack_l3proto_ipv4_fini(void)
#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
nf_conntrack_ipv4_compat_fini();
#endif
nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv4);
nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops));
unregister_pernet_subsys(&ipv4_net_ops);
nf_unregister_sockopt(&so_getorigdst);

26
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
View file

@ -439,10 +439,9 @@ static int ipv6_net_init(struct net *net)
printk(KERN_ERR "nf_conntrack_l4proto_icmp6: protocol register failed\n");
goto cleanup_udp6;
}
ret = nf_conntrack_l3proto_register(net,
&nf_conntrack_l3proto_ipv6);
ret = nf_ct_l3proto_pernet_register(net, &nf_conntrack_l3proto_ipv6);
if (ret < 0) {
printk(KERN_ERR "nf_conntrack_l3proto_ipv6: protocol register failed\n");
pr_err("nf_conntrack_ipv6: pernet registration failed.\n");
goto cleanup_icmpv6;
}
return 0;
@ -461,8 +460,7 @@ static int ipv6_net_init(struct net *net)
static void ipv6_net_exit(struct net *net)
{
nf_conntrack_l3proto_unregister(net,
&nf_conntrack_l3proto_ipv6);
nf_ct_l3proto_pernet_unregister(net, &nf_conntrack_l3proto_ipv6);
nf_conntrack_l4proto_unregister(net,
&nf_conntrack_l4proto_icmpv6);
nf_conntrack_l4proto_unregister(net,
@ -491,19 +489,28 @@ static int __init nf_conntrack_l3proto_ipv6_init(void)
ret = register_pernet_subsys(&ipv6_net_ops);
if (ret < 0)
goto cleanup_pernet;
goto cleanup_sockopt;
ret = nf_register_hooks(ipv6_conntrack_ops,
ARRAY_SIZE(ipv6_conntrack_ops));
if (ret < 0) {
pr_err("nf_conntrack_ipv6: can't register pre-routing defrag "
"hook.\n");
goto cleanup_ipv6;
goto cleanup_pernet;
}
ret = nf_ct_l3proto_register(&nf_conntrack_l3proto_ipv6);
if (ret < 0) {
pr_err("nf_conntrack_ipv6: can't register ipv6 proto.\n");
goto cleanup_hooks;
}
return ret;
cleanup_ipv6:
unregister_pernet_subsys(&ipv6_net_ops);
cleanup_hooks:
nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops));
cleanup_pernet:
unregister_pernet_subsys(&ipv6_net_ops);
cleanup_sockopt:
nf_unregister_sockopt(&so_getorigdst6);
return ret;
}
@ -511,6 +518,7 @@ static int __init nf_conntrack_l3proto_ipv6_init(void)
static void __exit nf_conntrack_l3proto_ipv6_fini(void)
{
synchronize_net();
nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv6);
nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops));
unregister_pernet_subsys(&ipv6_net_ops);
nf_unregister_sockopt(&so_getorigdst6);

31
net/netfilter/nf_conntrack_proto.c
View file

@ -212,8 +212,7 @@ static void nf_ct_l3proto_unregister_sysctl(struct net *net,
#endif
}
static int
nf_conntrack_l3proto_register_net(struct nf_conntrack_l3proto *proto)
int nf_ct_l3proto_register(struct nf_conntrack_l3proto *proto)
{
int ret = 0;
struct nf_conntrack_l3proto *old;
@ -242,8 +241,9 @@ out_unlock:
return ret;
}
EXPORT_SYMBOL_GPL(nf_ct_l3proto_register);
int nf_conntrack_l3proto_register(struct net *net,
int nf_ct_l3proto_pernet_register(struct net *net,
struct nf_conntrack_l3proto *proto)
{
int ret = 0;
@ -254,22 +254,11 @@ int nf_conntrack_l3proto_register(struct net *net,
return ret;
}
ret = nf_ct_l3proto_register_sysctl(net, proto);
if (ret < 0)
return ret;
if (net == &init_net) {
ret = nf_conntrack_l3proto_register_net(proto);
if (ret < 0)
nf_ct_l3proto_unregister_sysctl(net, proto);
}
return ret;
return nf_ct_l3proto_register_sysctl(net, proto);
}
EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_register);
EXPORT_SYMBOL_GPL(nf_ct_l3proto_pernet_register);
static void
nf_conntrack_l3proto_unregister_net(struct nf_conntrack_l3proto *proto)
void nf_ct_l3proto_unregister(struct nf_conntrack_l3proto *proto)
{
BUG_ON(proto->l3proto >= AF_MAX);
@ -283,19 +272,17 @@ nf_conntrack_l3proto_unregister_net(struct nf_conntrack_l3proto *proto)
synchronize_rcu();
}
EXPORT_SYMBOL_GPL(nf_ct_l3proto_unregister);
void nf_conntrack_l3proto_unregister(struct net *net,
void nf_ct_l3proto_pernet_unregister(struct net *net,
struct nf_conntrack_l3proto *proto)
{
if (net == &init_net)
nf_conntrack_l3proto_unregister_net(proto);
nf_ct_l3proto_unregister_sysctl(net, proto);
/* Remove all contrack entries for this protocol */
nf_ct_iterate_cleanup(net, kill_l3proto, proto);
}
EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_unregister);
EXPORT_SYMBOL_GPL(nf_ct_l3proto_pernet_unregister);
static struct nf_proto_net *nf_ct_l4proto_net(struct net *net,
struct nf_conntrack_l4proto *l4proto)