From 7b1a74fdbb9ec38a9780620fae25519fde4b21ee Mon Sep 17 00:00:00 2001 From: "Denis V. Lunev" Date: Thu, 10 Jan 2008 03:22:17 -0800 Subject: [NETNS]: Refactor fib initialization so it can handle multiple namespaces. This patch makes the fib to be initialized as a subsystem for the network namespaces. The code does not handle several namespaces yet, so in case of a creation of a network namespace, the creation/initialization will not occur. Acked-by: Benjamin Thery Acked-by: Daniel Lezcano Signed-off-by: Denis V. Lunev Signed-off-by: David S. Miller --- net/ipv4/fib_frontend.c | 88 ++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 80 insertions(+), 8 deletions(-) (limited to 'net/ipv4/fib_frontend.c') diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 1bb956b3be28..0484cae02736 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -59,7 +59,7 @@ struct fib_table *ip_fib_main_table; #define FIB_TABLE_HASHSZ 1 static struct hlist_head fib_table_hash[FIB_TABLE_HASHSZ]; -static int __init fib4_rules_init(void) +static int __net_init fib4_rules_init(struct net *net) { ip_fib_local_table = fib_hash_init(RT_TABLE_LOCAL); if (ip_fib_local_table == NULL) @@ -863,10 +863,18 @@ static void nl_fib_input(struct sk_buff *skb) netlink_unicast(fibnl, skb, pid, MSG_DONTWAIT); } -static void nl_fib_lookup_init(void) +static int nl_fib_lookup_init(struct net *net) { - fibnl = netlink_kernel_create(&init_net, NETLINK_FIB_LOOKUP, 0, + fibnl = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, 0, nl_fib_input, NULL, THIS_MODULE); + if (fibnl == NULL) + return -EAFNOSUPPORT; + return 0; +} + +static void nl_fib_lookup_exit(struct net *net) +{ + sock_put(fibnl); } static void fib_disable_ip(struct net_device *dev, int force) @@ -949,22 +957,86 @@ static struct notifier_block fib_netdev_notifier = { .notifier_call =fib_netdev_event, }; -void __init ip_fib_init(void) +static int __net_init ip_fib_net_init(struct net *net) { unsigned int i; for (i = 0; i < FIB_TABLE_HASHSZ; i++) INIT_HLIST_HEAD(&fib_table_hash[i]); - BUG_ON(fib4_rules_init()); + return fib4_rules_init(net); +} - register_netdevice_notifier(&fib_netdev_notifier); - register_inetaddr_notifier(&fib_inetaddr_notifier); - nl_fib_lookup_init(); +static void __net_exit ip_fib_net_exit(struct net *net) +{ + unsigned int i; + +#ifdef CONFIG_IP_MULTIPLE_TABLES + fib4_rules_exit(net); +#endif + + for (i = 0; i < FIB_TABLE_HASHSZ; i++) { + struct fib_table *tb; + struct hlist_head *head; + struct hlist_node *node, *tmp; + head = &fib_table_hash[i]; + hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) { + hlist_del(node); + tb->tb_flush(tb); + kfree(tb); + } + } +} + +static int __net_init fib_net_init(struct net *net) +{ + int error; + + error = 0; + if (net != &init_net) + goto out; + + error = ip_fib_net_init(net); + if (error < 0) + goto out; + error = nl_fib_lookup_init(net); + if (error < 0) + goto out_nlfl; + error = fib_proc_init(net); + if (error < 0) + goto out_proc; +out: + return error; + +out_proc: + nl_fib_lookup_exit(net); +out_nlfl: + ip_fib_net_exit(net); + goto out; +} + +static void __net_exit fib_net_exit(struct net *net) +{ + fib_proc_exit(net); + nl_fib_lookup_exit(net); + ip_fib_net_exit(net); +} + +static struct pernet_operations fib_net_ops = { + .init = fib_net_init, + .exit = fib_net_exit, +}; + +void __init ip_fib_init(void) +{ rtnl_register(PF_INET, RTM_NEWROUTE, inet_rtm_newroute, NULL); rtnl_register(PF_INET, RTM_DELROUTE, inet_rtm_delroute, NULL); rtnl_register(PF_INET, RTM_GETROUTE, NULL, inet_dump_fib); + + register_pernet_subsys(&fib_net_ops); + register_netdevice_notifier(&fib_netdev_notifier); + register_inetaddr_notifier(&fib_inetaddr_notifier); } EXPORT_SYMBOL(inet_addr_type); -- cgit v1.2.2