diff options
| -rw-r--r-- | net/ipv4/nexthop.c | 54 |
1 files changed, 52 insertions, 2 deletions
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 9a235d5c5670..5e1b22d4f939 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -157,6 +157,27 @@ static int call_nexthop_notifiers(struct net *net, return notifier_to_errno(err); } +static int call_nexthop_notifier(struct notifier_block *nb, struct net *net, + enum nexthop_event_type event_type, + struct nexthop *nh, + struct netlink_ext_ack *extack) +{ + struct nh_notifier_info info = { + .net = net, + .extack = extack, + }; + int err; + + err = nh_notifier_info_init(&info, nh); + if (err) + return err; + + err = nb->notifier_call(nb, event_type, &info); + nh_notifier_info_fini(&info); + + return notifier_to_errno(err); +} + static unsigned int nh_dev_hashfn(unsigned int val) { unsigned int mask = NH_DEV_HASHSIZE - 1; @@ -2118,11 +2139,40 @@ static struct notifier_block nh_netdev_notifier = { .notifier_call = nh_netdev_event, }; +static int nexthops_dump(struct net *net, struct notifier_block *nb, + struct netlink_ext_ack *extack) +{ + struct rb_root *root = &net->nexthop.rb_root; + struct rb_node *node; + int err = 0; + + for (node = rb_first(root); node; node = rb_next(node)) { + struct nexthop *nh; + + nh = rb_entry(node, struct nexthop, rb_node); + err = call_nexthop_notifier(nb, net, NEXTHOP_EVENT_REPLACE, nh, + extack); + if (err) + break; + } + + return err; +} + int register_nexthop_notifier(struct net *net, struct notifier_block *nb, struct netlink_ext_ack *extack) { - return blocking_notifier_chain_register(&net->nexthop.notifier_chain, - nb); + int err; + + rtnl_lock(); + err = nexthops_dump(net, nb, extack); + if (err) + goto unlock; + err = blocking_notifier_chain_register(&net->nexthop.notifier_chain, + nb); +unlock: + rtnl_unlock(); + return err; } EXPORT_SYMBOL(register_nexthop_notifier); |