diff options
Diffstat (limited to 'net/ipv6/netfilter/nf_defrag_ipv6_hooks.c')
| -rw-r--r-- | net/ipv6/netfilter/nf_defrag_ipv6_hooks.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c index 402dc4ca9504..e8a59d8bf2ad 100644 --- a/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c +++ b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c @@ -137,14 +137,16 @@ int nf_defrag_ipv6_enable(struct net *net) struct nft_ct_frag6_pernet *nf_frag = net_generic(net, nf_frag_pernet_id); int err = 0; - might_sleep(); - - if (nf_frag->users) - return 0; - mutex_lock(&defrag6_mutex); - if (nf_frag->users) + if (nf_frag->users == UINT_MAX) { + err = -EOVERFLOW; + goto out_unlock; + } + + if (nf_frag->users) { + nf_frag->users++; goto out_unlock; + } err = nf_register_net_hooks(net, ipv6_defrag_ops, ARRAY_SIZE(ipv6_defrag_ops)); @@ -157,6 +159,21 @@ int nf_defrag_ipv6_enable(struct net *net) } EXPORT_SYMBOL_GPL(nf_defrag_ipv6_enable); +void nf_defrag_ipv6_disable(struct net *net) +{ + struct nft_ct_frag6_pernet *nf_frag = net_generic(net, nf_frag_pernet_id); + + mutex_lock(&defrag6_mutex); + if (nf_frag->users) { + nf_frag->users--; + if (nf_frag->users == 0) + nf_unregister_net_hooks(net, ipv6_defrag_ops, + ARRAY_SIZE(ipv6_defrag_ops)); + } + mutex_unlock(&defrag6_mutex); +} +EXPORT_SYMBOL_GPL(nf_defrag_ipv6_disable); + module_init(nf_defrag_init); module_exit(nf_defrag_fini); |