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netfilter: netns ebtables: part 1

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* propagate netns from userspace, register table in passed netns
* remporarily register every ebt_table in init_net

P. S.: one needs to add ".netns_ok = 1" to igmp_protocol to test with
ebtables(8) in netns.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Alexey Dobriyan 2008-11-04 14:22:55 +01:00 committed by Patrick McHardy
parent 19223f26d9
commit 511061e2dd
5 changed files with 18 additions and 17 deletions
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2
include/linux/netfilter_bridge/ebtables.h
View file

@ -300,7 +300,7 @@ struct ebt_table
#define EBT_ALIGN(s) (((s) + (__alignof__(struct ebt_replace)-1)) & \
~(__alignof__(struct ebt_replace)-1))
extern int ebt_register_table(struct ebt_table *table);
extern int ebt_register_table(struct net *net, struct ebt_table *table);
extern void ebt_unregister_table(struct ebt_table *table);
extern unsigned int ebt_do_table(unsigned int hook, struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,

2
net/bridge/netfilter/ebtable_broute.c
View file

@ -66,7 +66,7 @@ static int __init ebtable_broute_init(void)
{
int ret;
ret = ebt_register_table(&broute_table);
ret = ebt_register_table(&init_net, &broute_table);
if (ret < 0)
return ret;
/* see br_input.c */

2
net/bridge/netfilter/ebtable_filter.c
View file

@ -95,7 +95,7 @@ static int __init ebtable_filter_init(void)
{
int ret;
ret = ebt_register_table(&frame_filter);
ret = ebt_register_table(&init_net, &frame_filter);
if (ret < 0)
return ret;
ret = nf_register_hooks(ebt_ops_filter, ARRAY_SIZE(ebt_ops_filter));

2
net/bridge/netfilter/ebtable_nat.c
View file

@ -102,7 +102,7 @@ static int __init ebtable_nat_init(void)
{
int ret;
ret = ebt_register_table(&frame_nat);
ret = ebt_register_table(&init_net, &frame_nat);
if (ret < 0)
return ret;
ret = nf_register_hooks(ebt_ops_nat, ARRAY_SIZE(ebt_ops_nat));

27
net/bridge/netfilter/ebtables.c
View file

@ -55,7 +55,6 @@
static DEFINE_MUTEX(ebt_mutex);
static LIST_HEAD(ebt_tables);
static struct xt_target ebt_standard_target = {
.name = "standard",
@ -315,9 +314,11 @@ find_inlist_lock(struct list_head *head, const char *name, const char *prefix,
}
static inline struct ebt_table *
find_table_lock(const char *name, int *error, struct mutex *mutex)
find_table_lock(struct net *net, const char *name, int *error,
struct mutex *mutex)
{
return find_inlist_lock(&ebt_tables, name, "ebtable_", error, mutex);
return find_inlist_lock(&net->xt.tables[NFPROTO_BRIDGE], name,
"ebtable_", error, mutex);
}
static inline int
@ -944,7 +945,7 @@ static void get_counters(struct ebt_counter *oldcounters,
}
/* replace the table */
static int do_replace(void __user *user, unsigned int len)
static int do_replace(struct net *net, void __user *user, unsigned int len)
{
int ret, i, countersize;
struct ebt_table_info *newinfo;
@ -1016,7 +1017,7 @@ static int do_replace(void __user *user, unsigned int len)
if (ret != 0)
goto free_counterstmp;
t = find_table_lock(tmp.name, &ret, &ebt_mutex);
t = find_table_lock(net, tmp.name, &ret, &ebt_mutex);
if (!t) {
ret = -ENOENT;
goto free_iterate;
@ -1097,7 +1098,7 @@ free_newinfo:
return ret;
}
int ebt_register_table(struct ebt_table *table)
int ebt_register_table(struct net *net, struct ebt_table *table)
{
struct ebt_table_info *newinfo;
struct ebt_table *t;
@ -1157,7 +1158,7 @@ int ebt_register_table(struct ebt_table *table)
if (ret != 0)
goto free_chainstack;
list_for_each_entry(t, &ebt_tables, list) {
list_for_each_entry(t, &net->xt.tables[NFPROTO_BRIDGE], list) {
if (strcmp(t->name, table->name) == 0) {
ret = -EEXIST;
BUGPRINT("Table name already exists\n");
@ -1170,7 +1171,7 @@ int ebt_register_table(struct ebt_table *table)
ret = -ENOENT;
goto free_unlock;
}
list_add(&table->list, &ebt_tables);
list_add(&table->list, &net->xt.tables[NFPROTO_BRIDGE]);
mutex_unlock(&ebt_mutex);
return 0;
free_unlock:
@ -1208,7 +1209,7 @@ void ebt_unregister_table(struct ebt_table *table)
}
/* userspace just supplied us with counters */
static int update_counters(void __user *user, unsigned int len)
static int update_counters(struct net *net, void __user *user, unsigned int len)
{
int i, ret;
struct ebt_counter *tmp;
@ -1228,7 +1229,7 @@ static int update_counters(void __user *user, unsigned int len)
return -ENOMEM;
}
t = find_table_lock(hlp.name, &ret, &ebt_mutex);
t = find_table_lock(net, hlp.name, &ret, &ebt_mutex);
if (!t)
goto free_tmp;
@ -1386,10 +1387,10 @@ static int do_ebt_set_ctl(struct sock *sk,
switch(cmd) {
case EBT_SO_SET_ENTRIES:
ret = do_replace(user, len);
ret = do_replace(sock_net(sk), user, len);
break;
case EBT_SO_SET_COUNTERS:
ret = update_counters(user, len);
ret = update_counters(sock_net(sk), user, len);
break;
default:
ret = -EINVAL;
@ -1406,7 +1407,7 @@ static int do_ebt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
if (copy_from_user(&tmp, user, sizeof(tmp)))
return -EFAULT;
t = find_table_lock(tmp.name, &ret, &ebt_mutex);
t = find_table_lock(sock_net(sk), tmp.name, &ret, &ebt_mutex);
if (!t)
return ret;