diff options
Diffstat (limited to 'drivers/net/ipvlan/ipvlan_main.c')
| -rw-r--r-- | drivers/net/ipvlan/ipvlan_main.c | 83 |
1 files changed, 68 insertions, 15 deletions
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c index aa8575ccbce3..618ed88fad0f 100644 --- a/drivers/net/ipvlan/ipvlan_main.c +++ b/drivers/net/ipvlan/ipvlan_main.c @@ -9,7 +9,11 @@ #include "ipvlan.h" -static u32 ipvl_nf_hook_refcnt = 0; +static unsigned int ipvlan_netid __read_mostly; + +struct ipvlan_netns { + unsigned int ipvl_nf_hook_refcnt; +}; static struct nf_hook_ops ipvl_nfops[] __read_mostly = { { @@ -35,28 +39,34 @@ static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev) ipvlan->dev->mtu = dev->mtu; } -static int ipvlan_register_nf_hook(void) +static int ipvlan_register_nf_hook(struct net *net) { + struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid); int err = 0; - if (!ipvl_nf_hook_refcnt) { - err = _nf_register_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops)); + if (!vnet->ipvl_nf_hook_refcnt) { + err = nf_register_net_hooks(net, ipvl_nfops, + ARRAY_SIZE(ipvl_nfops)); if (!err) - ipvl_nf_hook_refcnt = 1; + vnet->ipvl_nf_hook_refcnt = 1; } else { - ipvl_nf_hook_refcnt++; + vnet->ipvl_nf_hook_refcnt++; } return err; } -static void ipvlan_unregister_nf_hook(void) +static void ipvlan_unregister_nf_hook(struct net *net) { - WARN_ON(!ipvl_nf_hook_refcnt); + struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid); + + if (WARN_ON(!vnet->ipvl_nf_hook_refcnt)) + return; - ipvl_nf_hook_refcnt--; - if (!ipvl_nf_hook_refcnt) - _nf_unregister_hooks(ipvl_nfops, ARRAY_SIZE(ipvl_nfops)); + vnet->ipvl_nf_hook_refcnt--; + if (!vnet->ipvl_nf_hook_refcnt) + nf_unregister_net_hooks(net, ipvl_nfops, + ARRAY_SIZE(ipvl_nfops)); } static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval) @@ -69,7 +79,7 @@ static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval) if (port->mode != nval) { if (nval == IPVLAN_MODE_L3S) { /* New mode is L3S */ - err = ipvlan_register_nf_hook(); + err = ipvlan_register_nf_hook(read_pnet(&port->pnet)); if (!err) { mdev->l3mdev_ops = &ipvl_l3mdev_ops; mdev->priv_flags |= IFF_L3MDEV_MASTER; @@ -78,7 +88,7 @@ static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval) } else if (port->mode == IPVLAN_MODE_L3S) { /* Old mode was L3S */ mdev->priv_flags &= ~IFF_L3MDEV_MASTER; - ipvlan_unregister_nf_hook(); + ipvlan_unregister_nf_hook(read_pnet(&port->pnet)); mdev->l3mdev_ops = NULL; } list_for_each_entry(ipvlan, &port->ipvlans, pnode) { @@ -111,6 +121,7 @@ static int ipvlan_port_create(struct net_device *dev) if (!port) return -ENOMEM; + write_pnet(&port->pnet, dev_net(dev)); port->dev = dev; port->mode = IPVLAN_MODE_L3; INIT_LIST_HEAD(&port->ipvlans); @@ -142,7 +153,7 @@ static void ipvlan_port_destroy(struct net_device *dev) dev->priv_flags &= ~IFF_IPVLAN_MASTER; if (port->mode == IPVLAN_MODE_L3S) { dev->priv_flags &= ~IFF_L3MDEV_MASTER; - ipvlan_unregister_nf_hook(); + ipvlan_unregister_nf_hook(dev_net(dev)); dev->l3mdev_ops = NULL; } netdev_rx_handler_unregister(dev); @@ -673,6 +684,24 @@ static int ipvlan_device_event(struct notifier_block *unused, ipvlan->dev); break; + case NETDEV_REGISTER: { + struct net *oldnet, *newnet = dev_net(dev); + struct ipvlan_netns *old_vnet; + + oldnet = read_pnet(&port->pnet); + if (net_eq(newnet, oldnet)) + break; + + write_pnet(&port->pnet, newnet); + + old_vnet = net_generic(oldnet, ipvlan_netid); + if (!old_vnet->ipvl_nf_hook_refcnt) + break; + + ipvlan_register_nf_hook(newnet); + ipvlan_unregister_nf_hook(oldnet); + break; + } case NETDEV_UNREGISTER: if (dev->reg_state != NETREG_UNREGISTERING) break; @@ -854,6 +883,23 @@ static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { .notifier_call = ipvlan_addr6_event, }; +static void ipvlan_ns_exit(struct net *net) +{ + struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid); + + if (WARN_ON_ONCE(vnet->ipvl_nf_hook_refcnt)) { + vnet->ipvl_nf_hook_refcnt = 0; + nf_unregister_net_hooks(net, ipvl_nfops, + ARRAY_SIZE(ipvl_nfops)); + } +} + +static struct pernet_operations ipvlan_net_ops = { + .id = &ipvlan_netid, + .size = sizeof(struct ipvlan_netns), + .exit = ipvlan_ns_exit, +}; + static int __init ipvlan_init_module(void) { int err; @@ -863,10 +909,16 @@ static int __init ipvlan_init_module(void) register_inet6addr_notifier(&ipvlan_addr6_notifier_block); register_inetaddr_notifier(&ipvlan_addr4_notifier_block); - err = ipvlan_link_register(&ipvlan_link_ops); + err = register_pernet_subsys(&ipvlan_net_ops); if (err < 0) goto error; + err = ipvlan_link_register(&ipvlan_link_ops); + if (err < 0) { + unregister_pernet_subsys(&ipvlan_net_ops); + goto error; + } + return 0; error: unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); @@ -878,6 +930,7 @@ error: static void __exit ipvlan_cleanup_module(void) { rtnl_link_unregister(&ipvlan_link_ops); + unregister_pernet_subsys(&ipvlan_net_ops); unregister_netdevice_notifier(&ipvlan_notifier_block); unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |