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-rw-r--r--include/net/net_namespace.h4
-rw-r--r--net/core/fib_rules.c91
2 files changed, 58 insertions, 37 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index b0a5f90..b8c1d60 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -40,6 +40,10 @@ struct net {
struct hlist_head *dev_name_head;
struct hlist_head *dev_index_head;
+ /* core fib_rules */
+ struct list_head rules_ops;
+ spinlock_t rules_mod_lock;
+
struct sock *rtnl; /* rtnetlink socket */
/* core sysctls */
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index e12e9f5..c5f78fe 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -15,9 +15,6 @@
#include <net/sock.h>
#include <net/fib_rules.h>
-static LIST_HEAD(rules_ops);
-static DEFINE_SPINLOCK(rules_mod_lock);
-
int fib_default_rule_add(struct fib_rules_ops *ops,
u32 pref, u32 table, u32 flags)
{
@@ -40,16 +37,17 @@ int fib_default_rule_add(struct fib_rules_ops *ops,
}
EXPORT_SYMBOL(fib_default_rule_add);
-static void notify_rule_change(int event, struct fib_rule *rule,
+static void notify_rule_change(struct net *net, int event,
+ struct fib_rule *rule,
struct fib_rules_ops *ops, struct nlmsghdr *nlh,
u32 pid);
-static struct fib_rules_ops *lookup_rules_ops(int family)
+static struct fib_rules_ops *lookup_rules_ops(struct net *net, int family)
{
struct fib_rules_ops *ops;
rcu_read_lock();
- list_for_each_entry_rcu(ops, &rules_ops, list) {
+ list_for_each_entry_rcu(ops, &net->rules_ops, list) {
if (ops->family == family) {
if (!try_module_get(ops->owner))
ops = NULL;
@@ -87,15 +85,16 @@ int fib_rules_register(struct net *net, struct fib_rules_ops *ops)
ops->action == NULL)
return -EINVAL;
- spin_lock(&rules_mod_lock);
- list_for_each_entry(o, &rules_ops, list)
+ spin_lock(&net->rules_mod_lock);
+ list_for_each_entry(o, &net->rules_ops, list)
if (ops->family == o->family)
goto errout;
- list_add_tail_rcu(&ops->list, &rules_ops);
+ hold_net(net);
+ list_add_tail_rcu(&ops->list, &net->rules_ops);
err = 0;
errout:
- spin_unlock(&rules_mod_lock);
+ spin_unlock(&net->rules_mod_lock);
return err;
}
@@ -118,8 +117,8 @@ int fib_rules_unregister(struct net *net, struct fib_rules_ops *ops)
int err = 0;
struct fib_rules_ops *o;
- spin_lock(&rules_mod_lock);
- list_for_each_entry(o, &rules_ops, list) {
+ spin_lock(&net->rules_mod_lock);
+ list_for_each_entry(o, &net->rules_ops, list) {
if (o == ops) {
list_del_rcu(&o->list);
fib_rules_cleanup_ops(ops);
@@ -129,9 +128,11 @@ int fib_rules_unregister(struct net *net, struct fib_rules_ops *ops)
err = -ENOENT;
out:
- spin_unlock(&rules_mod_lock);
+ spin_unlock(&net->rules_mod_lock);
synchronize_rcu();
+ if (!err)
+ release_net(net);
return err;
}
@@ -229,13 +230,10 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
struct nlattr *tb[FRA_MAX+1];
int err = -EINVAL, unresolved = 0;
- if (net != &init_net)
- return -EINVAL;
-
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
goto errout;
- ops = lookup_rules_ops(frh->family);
+ ops = lookup_rules_ops(net, frh->family);
if (ops == NULL) {
err = EAFNOSUPPORT;
goto errout;
@@ -348,7 +346,7 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
else
list_add_rcu(&rule->list, &ops->rules_list);
- notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).pid);
+ notify_rule_change(net, RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).pid);
flush_route_cache(ops);
rules_ops_put(ops);
return 0;
@@ -369,13 +367,10 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
struct nlattr *tb[FRA_MAX+1];
int err = -EINVAL;
- if (net != &init_net)
- return -EINVAL;
-
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
goto errout;
- ops = lookup_rules_ops(frh->family);
+ ops = lookup_rules_ops(net, frh->family);
if (ops == NULL) {
err = EAFNOSUPPORT;
goto errout;
@@ -441,7 +436,7 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
}
synchronize_rcu();
- notify_rule_change(RTM_DELRULE, rule, ops, nlh,
+ notify_rule_change(net, RTM_DELRULE, rule, ops, nlh,
NETLINK_CB(skb).pid);
fib_rule_put(rule);
flush_route_cache(ops);
@@ -551,13 +546,10 @@ static int fib_nl_dumprule(struct sk_buff *skb, struct netlink_callback *cb)
struct fib_rules_ops *ops;
int idx = 0, family;
- if (net != &init_net)
- return -EINVAL;
-
family = rtnl_msg_family(cb->nlh);
if (family != AF_UNSPEC) {
/* Protocol specific dump request */
- ops = lookup_rules_ops(family);
+ ops = lookup_rules_ops(net, family);
if (ops == NULL)
return -EAFNOSUPPORT;
@@ -565,7 +557,7 @@ static int fib_nl_dumprule(struct sk_buff *skb, struct netlink_callback *cb)
}
rcu_read_lock();
- list_for_each_entry_rcu(ops, &rules_ops, list) {
+ list_for_each_entry_rcu(ops, &net->rules_ops, list) {
if (idx < cb->args[0] || !try_module_get(ops->owner))
goto skip;
@@ -582,7 +574,7 @@ static int fib_nl_dumprule(struct sk_buff *skb, struct netlink_callback *cb)
return skb->len;
}
-static void notify_rule_change(int event, struct fib_rule *rule,
+static void notify_rule_change(struct net *net, int event, struct fib_rule *rule,
struct fib_rules_ops *ops, struct nlmsghdr *nlh,
u32 pid)
{
@@ -600,10 +592,10 @@ static void notify_rule_change(int event, struct fib_rule *rule,
kfree_skb(skb);
goto errout;
}
- err = rtnl_notify(skb, &init_net, pid, ops->nlgroup, nlh, GFP_KERNEL);
+ err = rtnl_notify(skb, net, pid, ops->nlgroup, nlh, GFP_KERNEL);
errout:
if (err < 0)
- rtnl_set_sk_err(&init_net, ops->nlgroup, err);
+ rtnl_set_sk_err(net, ops->nlgroup, err);
}
static void attach_rules(struct list_head *rules, struct net_device *dev)
@@ -631,22 +623,20 @@ static int fib_rules_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
struct net_device *dev = ptr;
+ struct net *net = dev->nd_net;
struct fib_rules_ops *ops;
- if (dev->nd_net != &init_net)
- return NOTIFY_DONE;
-
ASSERT_RTNL();
rcu_read_lock();
switch (event) {
case NETDEV_REGISTER:
- list_for_each_entry(ops, &rules_ops, list)
+ list_for_each_entry(ops, &net->rules_ops, list)
attach_rules(&ops->rules_list, dev);
break;
case NETDEV_UNREGISTER:
- list_for_each_entry(ops, &rules_ops, list)
+ list_for_each_entry(ops, &net->rules_ops, list)
detach_rules(&ops->rules_list, dev);
break;
}
@@ -660,13 +650,40 @@ static struct notifier_block fib_rules_notifier = {
.notifier_call = fib_rules_event,
};
+static int fib_rules_net_init(struct net *net)
+{
+ INIT_LIST_HEAD(&net->rules_ops);
+ spin_lock_init(&net->rules_mod_lock);
+ return 0;
+}
+
+static struct pernet_operations fib_rules_net_ops = {
+ .init = fib_rules_net_init,
+};
+
static int __init fib_rules_init(void)
{
+ int err;
rtnl_register(PF_UNSPEC, RTM_NEWRULE, fib_nl_newrule, NULL);
rtnl_register(PF_UNSPEC, RTM_DELRULE, fib_nl_delrule, NULL);
rtnl_register(PF_UNSPEC, RTM_GETRULE, NULL, fib_nl_dumprule);
- return register_netdevice_notifier(&fib_rules_notifier);
+ err = register_netdevice_notifier(&fib_rules_notifier);
+ if (err < 0)
+ goto fail;
+
+ err = register_pernet_subsys(&fib_rules_net_ops);
+ if (err < 0)
+ goto fail_unregister;
+ return 0;
+
+fail_unregister:
+ unregister_netdevice_notifier(&fib_rules_notifier);
+fail:
+ rtnl_unregister(PF_UNSPEC, RTM_NEWRULE);
+ rtnl_unregister(PF_UNSPEC, RTM_DELRULE);
+ rtnl_unregister(PF_UNSPEC, RTM_GETRULE);
+ return err;
}
subsys_initcall(fib_rules_init);
generated by cgit v1.1 at 2024-04-28 23:06:24 +0000