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netfilter: nf_ct_generic: add namespace support 

This patch adds namespace support for the generic layer 4 protocol
tracker.

Acked-by: Eric W. Biederman <ebiederm@xmission.com>
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 2012-05-28 21:04:11 +00:00 committed by Pablo Neira Ayuso
parent 524a53e5ad
commit 15f585bd76
5 changed files with 78 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/net/netfilter/nf_conntrack_core.h
View File

@ -28,8 +28,8 @@ extern unsigned int nf_conntrack_in(struct net *net,
extern int nf_conntrack_init(struct net *net);
extern void nf_conntrack_cleanup(struct net *net);
extern int nf_conntrack_proto_init(void);
extern void nf_conntrack_proto_fini(void);
extern int nf_conntrack_proto_init(struct net *net);
extern void nf_conntrack_proto_fini(struct net *net);
extern bool
nf_ct_get_tuple(const struct sk_buff *skb,

6
include/net/netns/conntrack.h
View File

@ -20,7 +20,13 @@ struct nf_proto_net {
unsigned int users;
};
struct nf_generic_net {
struct nf_proto_net pn;
unsigned int timeout;
};
struct nf_ip_net {
struct nf_generic_net generic;
#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
struct ctl_table_header *ctl_table_header;
struct ctl_table *ctl_table;

17
net/netfilter/nf_conntrack_core.c
View File

@ -1333,7 +1333,6 @@ static void nf_conntrack_cleanup_init_net(void)
while (untrack_refs() > 0)
schedule();
nf_conntrack_proto_fini();
#ifdef CONFIG_NF_CONNTRACK_ZONES
nf_ct_extend_unregister(&nf_ct_zone_extend);
#endif
@ -1372,7 +1371,7 @@ void nf_conntrack_cleanup(struct net *net)
netfilter framework. Roll on, two-stage module
delete... */
synchronize_net();
nf_conntrack_proto_fini(net);
nf_conntrack_cleanup_net(net);
if (net_eq(net, &init_net)) {
@ -1496,11 +1495,6 @@ static int nf_conntrack_init_init_net(void)
printk(KERN_INFO "nf_conntrack version %s (%u buckets, %d max)\n",
NF_CONNTRACK_VERSION, nf_conntrack_htable_size,
nf_conntrack_max);
ret = nf_conntrack_proto_init();
if (ret < 0)
goto err_proto;
#ifdef CONFIG_NF_CONNTRACK_ZONES
ret = nf_ct_extend_register(&nf_ct_zone_extend);
if (ret < 0)
@ -1518,9 +1512,7 @@ static int nf_conntrack_init_init_net(void)
#ifdef CONFIG_NF_CONNTRACK_ZONES
err_extend:
nf_conntrack_proto_fini();
#endif
err_proto:
return ret;
}
@ -1583,9 +1575,7 @@ static int nf_conntrack_init_net(struct net *net)
ret = nf_conntrack_helper_init(net);
if (ret < 0)
goto err_helper;
return 0;
err_helper:
nf_conntrack_timeout_fini(net);
err_timeout:
@ -1622,6 +1612,9 @@ int nf_conntrack_init(struct net *net)
if (ret < 0)
goto out_init_net;
}
ret = nf_conntrack_proto_init(net);
if (ret < 0)
goto out_proto;
ret = nf_conntrack_init_net(net);
if (ret < 0)
goto out_net;
@ -1637,6 +1630,8 @@ int nf_conntrack_init(struct net *net)
return 0;
out_net:
nf_conntrack_proto_fini(net);
out_proto:
if (net_eq(net, &init_net))
nf_conntrack_cleanup_init_net();
out_init_net:

46
net/netfilter/nf_conntrack_proto.c
View File

@ -302,10 +302,16 @@ EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_unregister);
static struct nf_proto_net *nf_ct_l4proto_net(struct net *net,
struct nf_conntrack_l4proto *l4proto)
{
if (l4proto->net_id)
return net_generic(net, *l4proto->net_id);
else
return NULL;
switch (l4proto->l4proto) {
case 255: /* l4proto_generic */
return (struct nf_proto_net *)&net->ct.nf_ct_proto.generic;
default:
if (l4proto->net_id)
return net_generic(net, *l4proto->net_id);
else
return NULL;
}
return NULL;
}
static
@ -487,28 +493,34 @@ void nf_conntrack_l4proto_unregister(struct net *net,
}
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_unregister);
int nf_conntrack_proto_init(void)
int nf_conntrack_proto_init(struct net *net)
{
unsigned int i;
int err;
err = nf_ct_l4proto_register_sysctl(&init_net, &nf_conntrack_l4proto_generic);
err = nf_conntrack_l4proto_generic.init_net(net);
if (err < 0)
return err;
err = nf_ct_l4proto_register_sysctl(net,
&nf_conntrack_l4proto_generic);
if (err < 0)
return err;
for (i = 0; i < AF_MAX; i++)
rcu_assign_pointer(nf_ct_l3protos[i],
&nf_conntrack_l3proto_generic);
if (net == &init_net) {
for (i = 0; i < AF_MAX; i++)
rcu_assign_pointer(nf_ct_l3protos[i],
&nf_conntrack_l3proto_generic);
}
return 0;
}
void nf_conntrack_proto_fini(void)
void nf_conntrack_proto_fini(struct net *net)
{
unsigned int i;
nf_ct_l4proto_unregister_sysctl(&init_net, &nf_conntrack_l4proto_generic);
/* free l3proto protocol tables */
for (i = 0; i < PF_MAX; i++)
kfree(nf_ct_protos[i]);
nf_ct_l4proto_unregister_sysctl(net,
&nf_conntrack_l4proto_generic);
if (net == &init_net) {
/* free l3proto protocol tables */
for (i = 0; i < PF_MAX; i++)
kfree(nf_ct_protos[i]);
}
}

38
net/netfilter/nf_conntrack_proto_generic.c
View File

@ -14,6 +14,11 @@
static unsigned int nf_ct_generic_timeout __read_mostly = 600*HZ;
static inline struct nf_generic_net *generic_pernet(struct net *net)
{
return &net->ct.nf_ct_proto.generic;
}
static bool generic_pkt_to_tuple(const struct sk_buff *skb,
unsigned int dataoff,
struct nf_conntrack_tuple *tuple)
@ -42,7 +47,7 @@ static int generic_print_tuple(struct seq_file *s,
static unsigned int *generic_get_timeouts(struct net *net)
{
return &nf_ct_generic_timeout;
return &(generic_pernet(net)->timeout);
}
/* Returns verdict for packet, or -1 for invalid. */
@ -110,7 +115,6 @@ static struct ctl_table_header *generic_sysctl_header;
static struct ctl_table generic_sysctl_table[] = {
{
.procname = "nf_conntrack_generic_timeout",
.data = &nf_ct_generic_timeout,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
@ -121,7 +125,6 @@ static struct ctl_table generic_sysctl_table[] = {
static struct ctl_table generic_compat_sysctl_table[] = {
{
.procname = "ip_conntrack_generic_timeout",
.data = &nf_ct_generic_timeout,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
@ -131,6 +134,34 @@ static struct ctl_table generic_compat_sysctl_table[] = {
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */
static int generic_init_net(struct net *net)
{
struct nf_generic_net *gn = generic_pernet(net);
struct nf_proto_net *pn = (struct nf_proto_net *)gn;
gn->timeout = nf_ct_generic_timeout;
#ifdef CONFIG_SYSCTL
pn->ctl_table = kmemdup(generic_sysctl_table,
sizeof(generic_sysctl_table),
GFP_KERNEL);
if (!pn->ctl_table)
return -ENOMEM;
pn->ctl_table[0].data = &gn->timeout;
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
pn->ctl_compat_table = kmemdup(generic_compat_sysctl_table,
sizeof(generic_compat_sysctl_table),
GFP_KERNEL);
if (!pn->ctl_compat_table) {
kfree(pn->ctl_table);
pn->ctl_table = NULL;
return -ENOMEM;
}
pn->ctl_compat_table[0].data = &gn->timeout;
#endif
#endif
return 0;
}
struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly =
{
.l3proto = PF_UNSPEC,
@ -158,4 +189,5 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly =
.ctl_compat_table = generic_compat_sysctl_table,
#endif
#endif
.init_net = generic_init_net,
};