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-rw-r--r--net/netfilter/nf_tables_api.c57
-rw-r--r--net/netfilter/nf_tables_inet.c41
-rw-r--r--net/netfilter/nf_tables_netdev.c46
3 files changed, 43 insertions, 101 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 084d1f553c46..b0ff26beec80 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -26,6 +26,7 @@
static LIST_HEAD(nf_tables_expressions);
static LIST_HEAD(nf_tables_objects);
static LIST_HEAD(nf_tables_flowtables);
+static LIST_HEAD(nf_tables_af_info);
/**
* nft_register_afinfo - register nf_tables address family info
@@ -35,17 +36,15 @@ static LIST_HEAD(nf_tables_flowtables);
* Register the address family for use with nf_tables. Returns zero on
* success or a negative errno code otherwise.
*/
-int nft_register_afinfo(struct net *net, struct nft_af_info *afi)
+int nft_register_afinfo(struct nft_af_info *afi)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
- list_add_tail_rcu(&afi->list, &net->nft.af_info);
+ list_add_tail_rcu(&afi->list, &nf_tables_af_info);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
return 0;
}
EXPORT_SYMBOL_GPL(nft_register_afinfo);
-static void __nft_release_afinfo(struct net *net, struct nft_af_info *afi);
-
/**
* nft_unregister_afinfo - unregister nf_tables address family info
*
@@ -53,10 +52,9 @@ static void __nft_release_afinfo(struct net *net, struct nft_af_info *afi);
*
* Unregister the address family for use with nf_tables.
*/
-void nft_unregister_afinfo(struct net *net, struct nft_af_info *afi)
+void nft_unregister_afinfo(struct nft_af_info *afi)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
- __nft_release_afinfo(net, afi);
list_del_rcu(&afi->list);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
}
@@ -66,7 +64,7 @@ static struct nft_af_info *nft_afinfo_lookup(struct net *net, int family)
{
struct nft_af_info *afi;
- list_for_each_entry(afi, &net->nft.af_info, list) {
+ list_for_each_entry(afi, &nf_tables_af_info, list) {
if (afi->family == family)
return afi;
}
@@ -5042,15 +5040,12 @@ void nft_flow_table_iterate(struct net *net,
void *data)
{
struct nft_flowtable *flowtable;
- const struct nft_af_info *afi;
const struct nft_table *table;
rcu_read_lock();
- list_for_each_entry_rcu(afi, &net->nft.af_info, list) {
- list_for_each_entry_rcu(table, &net->nft.tables, list) {
- list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
- iter(&flowtable->data, data);
- }
+ list_for_each_entry_rcu(table, &net->nft.tables, list) {
+ list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
+ iter(&flowtable->data, data);
}
}
rcu_read_unlock();
@@ -6533,21 +6528,6 @@ int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
}
EXPORT_SYMBOL_GPL(nft_data_dump);
-static int __net_init nf_tables_init_net(struct net *net)
-{
- INIT_LIST_HEAD(&net->nft.af_info);
- INIT_LIST_HEAD(&net->nft.tables);
- INIT_LIST_HEAD(&net->nft.commit_list);
- net->nft.base_seq = 1;
- return 0;
-}
-
-static void __net_exit nf_tables_exit_net(struct net *net)
-{
- WARN_ON_ONCE(!list_empty(&net->nft.af_info));
- WARN_ON_ONCE(!list_empty(&net->nft.commit_list));
-}
-
int __nft_release_basechain(struct nft_ctx *ctx)
{
struct nft_rule *rule, *nr;
@@ -6568,8 +6548,7 @@ int __nft_release_basechain(struct nft_ctx *ctx)
}
EXPORT_SYMBOL_GPL(__nft_release_basechain);
-/* Called by nft_unregister_afinfo() from __net_exit path, nfnl_lock is held. */
-static void __nft_release_afinfo(struct net *net, struct nft_af_info *afi)
+static void __nft_release_afinfo(struct net *net)
{
struct nft_flowtable *flowtable, *nf;
struct nft_table *table, *nt;
@@ -6579,10 +6558,11 @@ static void __nft_release_afinfo(struct net *net, struct nft_af_info *afi)
struct nft_set *set, *ns;
struct nft_ctx ctx = {
.net = net,
- .family = afi->family,
};
list_for_each_entry_safe(table, nt, &net->nft.tables, list) {
+ ctx.family = table->afi->family;
+
list_for_each_entry(chain, &table->chains, list)
nf_tables_unregister_hook(net, table, chain);
list_for_each_entry(flowtable, &table->flowtables, list)
@@ -6623,6 +6603,21 @@ static void __nft_release_afinfo(struct net *net, struct nft_af_info *afi)
}
}
+static int __net_init nf_tables_init_net(struct net *net)
+{
+ INIT_LIST_HEAD(&net->nft.tables);
+ INIT_LIST_HEAD(&net->nft.commit_list);
+ net->nft.base_seq = 1;
+ return 0;
+}
+
+static void __net_exit nf_tables_exit_net(struct net *net)
+{
+ __nft_release_afinfo(net);
+ WARN_ON_ONCE(!list_empty(&net->nft.tables));
+ WARN_ON_ONCE(!list_empty(&net->nft.commit_list));
+}
+
static struct pernet_operations nf_tables_net_ops = {
.init = nf_tables_init_net,
.exit = nf_tables_exit_net,
diff --git a/net/netfilter/nf_tables_inet.c b/net/netfilter/nf_tables_inet.c
index 00b1fc9cea2e..d486ced4de84 100644
--- a/net/netfilter/nf_tables_inet.c
+++ b/net/netfilter/nf_tables_inet.c
@@ -43,34 +43,6 @@ static struct nft_af_info nft_af_inet __read_mostly = {
.owner = THIS_MODULE,
};
-static int __net_init nf_tables_inet_init_net(struct net *net)
-{
- net->nft.inet = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
- if (net->nft.inet == NULL)
- return -ENOMEM;
- memcpy(net->nft.inet, &nft_af_inet, sizeof(nft_af_inet));
-
- if (nft_register_afinfo(net, net->nft.inet) < 0)
- goto err;
-
- return 0;
-
-err:
- kfree(net->nft.inet);
- return -ENOMEM;
-}
-
-static void __net_exit nf_tables_inet_exit_net(struct net *net)
-{
- nft_unregister_afinfo(net, net->nft.inet);
- kfree(net->nft.inet);
-}
-
-static struct pernet_operations nf_tables_inet_net_ops = {
- .init = nf_tables_inet_init_net,
- .exit = nf_tables_inet_exit_net,
-};
-
static const struct nf_chain_type filter_inet = {
.name = "filter",
.type = NFT_CHAIN_T_DEFAULT,
@@ -94,21 +66,24 @@ static int __init nf_tables_inet_init(void)
{
int ret;
- ret = nft_register_chain_type(&filter_inet);
- if (ret < 0)
+ if (nft_register_afinfo(&nft_af_inet) < 0)
return ret;
- ret = register_pernet_subsys(&nf_tables_inet_net_ops);
+ ret = nft_register_chain_type(&filter_inet);
if (ret < 0)
- nft_unregister_chain_type(&filter_inet);
+ goto err_register_chain;
+
+ return ret;
+err_register_chain:
+ nft_unregister_afinfo(&nft_af_inet);
return ret;
}
static void __exit nf_tables_inet_exit(void)
{
- unregister_pernet_subsys(&nf_tables_inet_net_ops);
nft_unregister_chain_type(&filter_inet);
+ nft_unregister_afinfo(&nft_af_inet);
}
module_init(nf_tables_inet_init);
diff --git a/net/netfilter/nf_tables_netdev.c b/net/netfilter/nf_tables_netdev.c
index 01b61a67a2ac..404b49acb125 100644
--- a/net/netfilter/nf_tables_netdev.c
+++ b/net/netfilter/nf_tables_netdev.c
@@ -43,34 +43,6 @@ static struct nft_af_info nft_af_netdev __read_mostly = {
.owner = THIS_MODULE,
};
-static int nf_tables_netdev_init_net(struct net *net)
-{
- net->nft.netdev = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
- if (net->nft.netdev == NULL)
- return -ENOMEM;
-
- memcpy(net->nft.netdev, &nft_af_netdev, sizeof(nft_af_netdev));
-
- if (nft_register_afinfo(net, net->nft.netdev) < 0)
- goto err;
-
- return 0;
-err:
- kfree(net->nft.netdev);
- return -ENOMEM;
-}
-
-static void nf_tables_netdev_exit_net(struct net *net)
-{
- nft_unregister_afinfo(net, net->nft.netdev);
- kfree(net->nft.netdev);
-}
-
-static struct pernet_operations nf_tables_netdev_net_ops = {
- .init = nf_tables_netdev_init_net,
- .exit = nf_tables_netdev_exit_net,
-};
-
static const struct nf_chain_type nft_filter_chain_netdev = {
.name = "filter",
.type = NFT_CHAIN_T_DEFAULT,
@@ -145,32 +117,32 @@ static int __init nf_tables_netdev_init(void)
{
int ret;
- ret = nft_register_chain_type(&nft_filter_chain_netdev);
- if (ret)
+ if (nft_register_afinfo(&nft_af_netdev) < 0)
return ret;
- ret = register_pernet_subsys(&nf_tables_netdev_net_ops);
+ ret = nft_register_chain_type(&nft_filter_chain_netdev);
if (ret)
- goto err1;
+ goto err_register_chain_type;
ret = register_netdevice_notifier(&nf_tables_netdev_notifier);
if (ret)
- goto err2;
+ goto err_register_netdevice_notifier;
return 0;
-err2:
- unregister_pernet_subsys(&nf_tables_netdev_net_ops);
-err1:
+err_register_netdevice_notifier:
nft_unregister_chain_type(&nft_filter_chain_netdev);
+err_register_chain_type:
+ nft_unregister_afinfo(&nft_af_netdev);
+
return ret;
}
static void __exit nf_tables_netdev_exit(void)
{
unregister_netdevice_notifier(&nf_tables_netdev_notifier);
- unregister_pernet_subsys(&nf_tables_netdev_net_ops);
nft_unregister_chain_type(&nft_filter_chain_netdev);
+ nft_unregister_afinfo(&nft_af_netdev);
}
module_init(nf_tables_netdev_init);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.