diff options
| -rw-r--r-- | include/net/netns/ipv6.h | 1 | ||||
| -rw-r--r-- | net/ipv6/ip6_fib.c | 26 |
2 files changed, 22 insertions, 5 deletions
diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h index 5f2cfd84570a..47dc70d8100a 100644 --- a/include/net/netns/ipv6.h +++ b/include/net/netns/ipv6.h @@ -72,6 +72,7 @@ struct netns_ipv6 { struct rt6_statistics *rt6_stats; struct timer_list ip6_fib_timer; struct hlist_head *fib_table_hash; + spinlock_t fib_table_hash_lock; struct fib6_table *fib6_main_tbl; struct list_head fib6_walkers; rwlock_t fib6_walker_lock; diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index bf727149fdec..79b672f3fc53 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -249,19 +249,33 @@ static struct fib6_table *fib6_alloc_table(struct net *net, u32 id) struct fib6_table *fib6_new_table(struct net *net, u32 id) { - struct fib6_table *tb; + struct fib6_table *tb, *new_tb; if (id == 0) id = RT6_TABLE_MAIN; + tb = fib6_get_table(net, id); if (tb) return tb; - tb = fib6_alloc_table(net, id); - if (tb) - fib6_link_table(net, tb); + new_tb = fib6_alloc_table(net, id); + if (!new_tb) + return NULL; + + spin_lock_bh(&net->ipv6.fib_table_hash_lock); + + tb = fib6_get_table(net, id); + if (unlikely(tb)) { + spin_unlock_bh(&net->ipv6.fib_table_hash_lock); + kfree(new_tb); + return tb; + } - return tb; + fib6_link_table(net, new_tb); + + spin_unlock_bh(&net->ipv6.fib_table_hash_lock); + + return new_tb; } EXPORT_SYMBOL_GPL(fib6_new_table); @@ -2423,6 +2437,8 @@ static int __net_init fib6_net_init(struct net *net) if (!net->ipv6.fib_table_hash) goto out_rt6_stats; + spin_lock_init(&net->ipv6.fib_table_hash_lock); + net->ipv6.fib6_main_tbl = kzalloc(sizeof(*net->ipv6.fib6_main_tbl), GFP_KERNEL); if (!net->ipv6.fib6_main_tbl) |