MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
MODULE_DESCRIPTION("cttimeout: Extended Netfilter Connection Tracking timeout tuning");
-static LIST_HEAD(cttimeout_list);
-
static const struct nla_policy cttimeout_nla_policy[CTA_TIMEOUT_MAX+1] = {
[CTA_TIMEOUT_NAME] = { .type = NLA_NUL_STRING,
.len = CTNL_TIMEOUT_NAME_MAX - 1},
return ret;
}
-static int
-cttimeout_new_timeout(struct sock *ctnl, struct sk_buff *skb,
- const struct nlmsghdr *nlh,
- const struct nlattr * const cda[])
+static int cttimeout_new_timeout(struct net *net, struct sock *ctnl,
+ struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const cda[])
{
__u16 l3num;
__u8 l4num;
struct nf_conntrack_l4proto *l4proto;
struct ctnl_timeout *timeout, *matching = NULL;
- struct net *net = sock_net(skb->sk);
char *name;
int ret;
l3num = ntohs(nla_get_be16(cda[CTA_TIMEOUT_L3PROTO]));
l4num = nla_get_u8(cda[CTA_TIMEOUT_L4PROTO]);
- list_for_each_entry(timeout, &cttimeout_list, head) {
+ list_for_each_entry(timeout, &net->nfct_timeout_list, head) {
if (strncmp(timeout->name, name, CTNL_TIMEOUT_NAME_MAX) != 0)
continue;
timeout->l3num = l3num;
timeout->l4proto = l4proto;
atomic_set(&timeout->refcnt, 1);
- list_add_tail_rcu(&timeout->head, &cttimeout_list);
+ list_add_tail_rcu(&timeout->head, &net->nfct_timeout_list);
return 0;
err:
static int
ctnl_timeout_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
+ struct net *net = sock_net(skb->sk);
struct ctnl_timeout *cur, *last;
if (cb->args[2])
cb->args[1] = 0;
rcu_read_lock();
- list_for_each_entry_rcu(cur, &cttimeout_list, head) {
+ list_for_each_entry_rcu(cur, &net->nfct_timeout_list, head) {
if (last) {
if (cur != last)
continue;
return skb->len;
}
-static int
-cttimeout_get_timeout(struct sock *ctnl, struct sk_buff *skb,
- const struct nlmsghdr *nlh,
- const struct nlattr * const cda[])
+static int cttimeout_get_timeout(struct net *net, struct sock *ctnl,
+ struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const cda[])
{
int ret = -ENOENT;
char *name;
return -EINVAL;
name = nla_data(cda[CTA_TIMEOUT_NAME]);
- list_for_each_entry(cur, &cttimeout_list, head) {
+ list_for_each_entry(cur, &net->nfct_timeout_list, head) {
struct sk_buff *skb2;
if (strncmp(cur->name, name, CTNL_TIMEOUT_NAME_MAX) != 0)
RCU_INIT_POINTER(timeout_ext->timeout, NULL);
}
-static void ctnl_untimeout(struct ctnl_timeout *timeout)
+static void ctnl_untimeout(struct net *net, struct ctnl_timeout *timeout)
{
struct nf_conntrack_tuple_hash *h;
const struct hlist_nulls_node *nn;
int i;
local_bh_disable();
- for (i = 0; i < init_net.ct.htable_size; i++) {
+ for (i = 0; i < net->ct.htable_size; i++) {
spin_lock(&nf_conntrack_locks[i % CONNTRACK_LOCKS]);
- if (i < init_net.ct.htable_size) {
- hlist_nulls_for_each_entry(h, nn, &init_net.ct.hash[i], hnnode)
+ if (i < net->ct.htable_size) {
+ hlist_nulls_for_each_entry(h, nn, &net->ct.hash[i], hnnode)
untimeout(h, timeout);
}
spin_unlock(&nf_conntrack_locks[i % CONNTRACK_LOCKS]);
}
/* try to delete object, fail if it is still in use. */
-static int ctnl_timeout_try_del(struct ctnl_timeout *timeout)
+static int ctnl_timeout_try_del(struct net *net, struct ctnl_timeout *timeout)
{
int ret = 0;
/* We are protected by nfnl mutex. */
list_del_rcu(&timeout->head);
nf_ct_l4proto_put(timeout->l4proto);
- ctnl_untimeout(timeout);
+ ctnl_untimeout(net, timeout);
kfree_rcu(timeout, rcu_head);
} else {
/* still in use, restore reference counter. */
return ret;
}
-static int
-cttimeout_del_timeout(struct sock *ctnl, struct sk_buff *skb,
- const struct nlmsghdr *nlh,
- const struct nlattr * const cda[])
+static int cttimeout_del_timeout(struct net *net, struct sock *ctnl,
+ struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const cda[])
{
- char *name;
struct ctnl_timeout *cur;
int ret = -ENOENT;
+ char *name;
if (!cda[CTA_TIMEOUT_NAME]) {
- list_for_each_entry(cur, &cttimeout_list, head)
- ctnl_timeout_try_del(cur);
+ list_for_each_entry(cur, &net->nfct_timeout_list, head)
+ ctnl_timeout_try_del(net, cur);
return 0;
}
name = nla_data(cda[CTA_TIMEOUT_NAME]);
- list_for_each_entry(cur, &cttimeout_list, head) {
+ list_for_each_entry(cur, &net->nfct_timeout_list, head) {
if (strncmp(cur->name, name, CTNL_TIMEOUT_NAME_MAX) != 0)
continue;
- ret = ctnl_timeout_try_del(cur);
+ ret = ctnl_timeout_try_del(net, cur);
if (ret < 0)
return ret;
return ret;
}
-static int
-cttimeout_default_set(struct sock *ctnl, struct sk_buff *skb,
- const struct nlmsghdr *nlh,
- const struct nlattr * const cda[])
+static int cttimeout_default_set(struct net *net, struct sock *ctnl,
+ struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ const struct nlattr * const cda[])
{
__u16 l3num;
__u8 l4num;
struct nf_conntrack_l4proto *l4proto;
- struct net *net = sock_net(skb->sk);
unsigned int *timeouts;
int ret;
return -1;
}
-static int cttimeout_default_get(struct sock *ctnl, struct sk_buff *skb,
+static int cttimeout_default_get(struct net *net, struct sock *ctnl,
+ struct sk_buff *skb,
const struct nlmsghdr *nlh,
const struct nlattr * const cda[])
{
__u16 l3num;
__u8 l4num;
struct nf_conntrack_l4proto *l4proto;
- struct net *net = sock_net(skb->sk);
struct sk_buff *skb2;
int ret, err;
}
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
-static struct ctnl_timeout *ctnl_timeout_find_get(const char *name)
+static struct ctnl_timeout *
+ctnl_timeout_find_get(struct net *net, const char *name)
{
struct ctnl_timeout *timeout, *matching = NULL;
rcu_read_lock();
- list_for_each_entry_rcu(timeout, &cttimeout_list, head) {
+ list_for_each_entry_rcu(timeout, &net->nfct_timeout_list, head) {
if (strncmp(timeout->name, name, CTNL_TIMEOUT_NAME_MAX) != 0)
continue;
MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_TIMEOUT);
+static int __net_init cttimeout_net_init(struct net *net)
+{
+ INIT_LIST_HEAD(&net->nfct_timeout_list);
+
+ return 0;
+}
+
+static void __net_exit cttimeout_net_exit(struct net *net)
+{
+ struct ctnl_timeout *cur, *tmp;
+
+ ctnl_untimeout(net, NULL);
+
+ list_for_each_entry_safe(cur, tmp, &net->nfct_timeout_list, head) {
+ list_del_rcu(&cur->head);
+ nf_ct_l4proto_put(cur->l4proto);
+ kfree_rcu(cur, rcu_head);
+ }
+}
+
+static struct pernet_operations cttimeout_ops = {
+ .init = cttimeout_net_init,
+ .exit = cttimeout_net_exit,
+};
+
static int __init cttimeout_init(void)
{
int ret;
+ ret = register_pernet_subsys(&cttimeout_ops);
+ if (ret < 0)
+ return ret;
+
ret = nfnetlink_subsys_register(&cttimeout_subsys);
if (ret < 0) {
pr_err("cttimeout_init: cannot register cttimeout with "
return 0;
err_out:
+ unregister_pernet_subsys(&cttimeout_ops);
return ret;
}
static void __exit cttimeout_exit(void)
{
- struct ctnl_timeout *cur, *tmp;
-
pr_info("cttimeout: unregistering from nfnetlink.\n");
nfnetlink_subsys_unregister(&cttimeout_subsys);
- /* Make sure no conntrack objects refer to custom timeouts anymore. */
- ctnl_untimeout(NULL);
-
- list_for_each_entry_safe(cur, tmp, &cttimeout_list, head) {
- list_del_rcu(&cur->head);
- /* We are sure that our objects have no clients at this point,
- * it's safe to release them all without checking refcnt.
- */
- nf_ct_l4proto_put(cur->l4proto);
- kfree_rcu(cur, rcu_head);
- }
+ unregister_pernet_subsys(&cttimeout_ops);
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
RCU_INIT_POINTER(nf_ct_timeout_find_get_hook, NULL);
RCU_INIT_POINTER(nf_ct_timeout_put_hook, NULL);
projects / cascardo / linux.git / blobdiff