diff options
Diffstat (limited to 'net/core/fib_rules.c')
| -rw-r--r-- | net/core/fib_rules.c | 78 |
1 files changed, 75 insertions, 3 deletions
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c index fdcb1bcd2afa..98e1066c3d55 100644 --- a/net/core/fib_rules.c +++ b/net/core/fib_rules.c @@ -299,6 +299,69 @@ out: } EXPORT_SYMBOL_GPL(fib_rules_lookup); +static int call_fib_rule_notifier(struct notifier_block *nb, struct net *net, + enum fib_event_type event_type, + struct fib_rule *rule, int family) +{ + struct fib_rule_notifier_info info = { + .info.family = family, + .rule = rule, + }; + + return call_fib_notifier(nb, net, event_type, &info.info); +} + +static int call_fib_rule_notifiers(struct net *net, + enum fib_event_type event_type, + struct fib_rule *rule, + struct fib_rules_ops *ops, + struct netlink_ext_ack *extack) +{ + struct fib_rule_notifier_info info = { + .info.family = ops->family, + .info.extack = extack, + .rule = rule, + }; + + ops->fib_rules_seq++; + return call_fib_notifiers(net, event_type, &info.info); +} + +/* Called with rcu_read_lock() */ +int fib_rules_dump(struct net *net, struct notifier_block *nb, int family) +{ + struct fib_rules_ops *ops; + struct fib_rule *rule; + + ops = lookup_rules_ops(net, family); + if (!ops) + return -EAFNOSUPPORT; + list_for_each_entry_rcu(rule, &ops->rules_list, list) + call_fib_rule_notifier(nb, net, FIB_EVENT_RULE_ADD, rule, + family); + rules_ops_put(ops); + + return 0; +} +EXPORT_SYMBOL_GPL(fib_rules_dump); + +unsigned int fib_rules_seq_read(struct net *net, int family) +{ + unsigned int fib_rules_seq; + struct fib_rules_ops *ops; + + ASSERT_RTNL(); + + ops = lookup_rules_ops(net, family); + if (!ops) + return 0; + fib_rules_seq = ops->fib_rules_seq; + rules_ops_put(ops); + + return fib_rules_seq; +} +EXPORT_SYMBOL_GPL(fib_rules_seq_read); + static int validate_rulemsg(struct fib_rule_hdr *frh, struct nlattr **tb, struct fib_rules_ops *ops) { @@ -548,6 +611,7 @@ int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh, if (rule->tun_id) ip_tunnel_need_metadata(); + call_fib_rule_notifiers(net, FIB_EVENT_RULE_ADD, rule, ops, extack); notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).portid); flush_route_cache(ops); rules_ops_put(ops); @@ -687,6 +751,8 @@ int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh, } } + call_fib_rule_notifiers(net, FIB_EVENT_RULE_DEL, rule, ops, + NULL); notify_rule_change(RTM_DELRULE, rule, ops, nlh, NETLINK_CB(skb).portid); fib_rule_put(rule); @@ -956,16 +1022,22 @@ static int __net_init fib_rules_net_init(struct net *net) return 0; } +static void __net_exit fib_rules_net_exit(struct net *net) +{ + WARN_ON_ONCE(!list_empty(&net->rules_ops)); +} + static struct pernet_operations fib_rules_net_ops = { .init = fib_rules_net_init, + .exit = fib_rules_net_exit, }; static int __init fib_rules_init(void) { int err; - rtnl_register(PF_UNSPEC, RTM_NEWRULE, fib_nl_newrule, NULL, NULL); - rtnl_register(PF_UNSPEC, RTM_DELRULE, fib_nl_delrule, NULL, NULL); - rtnl_register(PF_UNSPEC, RTM_GETRULE, NULL, fib_nl_dumprule, NULL); + rtnl_register(PF_UNSPEC, RTM_NEWRULE, fib_nl_newrule, NULL, 0); + rtnl_register(PF_UNSPEC, RTM_DELRULE, fib_nl_delrule, NULL, 0); + rtnl_register(PF_UNSPEC, RTM_GETRULE, NULL, fib_nl_dumprule, 0); err = register_pernet_subsys(&fib_rules_net_ops); if (err < 0) |