diff options
Diffstat (limited to 'net/netfilter/xt_connlimit.c')
-rw-r--r-- | net/netfilter/xt_connlimit.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c index 38f03f75a63..0d9d18ea2b0 100644 --- a/net/netfilter/xt_connlimit.c +++ b/net/netfilter/xt_connlimit.c @@ -40,15 +40,11 @@ struct xt_connlimit_data { spinlock_t lock; }; -static u_int32_t connlimit_rnd; -static bool connlimit_rnd_inited; +static u_int32_t connlimit_rnd __read_mostly; +static bool connlimit_rnd_inited __read_mostly; static inline unsigned int connlimit_iphash(__be32 addr) { - if (unlikely(!connlimit_rnd_inited)) { - get_random_bytes(&connlimit_rnd, sizeof(connlimit_rnd)); - connlimit_rnd_inited = true; - } return jhash_1word((__force __u32)addr, connlimit_rnd) & 0xFF; } @@ -59,11 +55,6 @@ connlimit_iphash6(const union nf_inet_addr *addr, union nf_inet_addr res; unsigned int i; - if (unlikely(!connlimit_rnd_inited)) { - get_random_bytes(&connlimit_rnd, sizeof(connlimit_rnd)); - connlimit_rnd_inited = true; - } - for (i = 0; i < ARRAY_SIZE(addr->ip6); ++i) res.ip6[i] = addr->ip6[i] & mask->ip6[i]; @@ -99,7 +90,8 @@ same_source_net(const union nf_inet_addr *addr, } } -static int count_them(struct xt_connlimit_data *data, +static int count_them(struct net *net, + struct xt_connlimit_data *data, const struct nf_conntrack_tuple *tuple, const union nf_inet_addr *addr, const union nf_inet_addr *mask, @@ -122,7 +114,7 @@ static int count_them(struct xt_connlimit_data *data, /* check the saved connections */ list_for_each_entry_safe(conn, tmp, hash, list) { - found = nf_conntrack_find_get(&init_net, &conn->tuple); + found = nf_conntrack_find_get(net, &conn->tuple); found_ct = NULL; if (found != NULL) @@ -180,6 +172,7 @@ static int count_them(struct xt_connlimit_data *data, static bool connlimit_mt(const struct sk_buff *skb, const struct xt_match_param *par) { + struct net *net = dev_net(par->in ? par->in : par->out); const struct xt_connlimit_info *info = par->matchinfo; union nf_inet_addr addr; struct nf_conntrack_tuple tuple; @@ -204,7 +197,7 @@ connlimit_mt(const struct sk_buff *skb, const struct xt_match_param *par) } spin_lock_bh(&info->data->lock); - connections = count_them(info->data, tuple_ptr, &addr, + connections = count_them(net, info->data, tuple_ptr, &addr, &info->mask, par->family); spin_unlock_bh(&info->data->lock); @@ -226,6 +219,10 @@ static bool connlimit_mt_check(const struct xt_mtchk_param *par) struct xt_connlimit_info *info = par->matchinfo; unsigned int i; + if (unlikely(!connlimit_rnd_inited)) { + get_random_bytes(&connlimit_rnd, sizeof(connlimit_rnd)); + connlimit_rnd_inited = true; + } if (nf_ct_l3proto_try_module_get(par->family) < 0) { printk(KERN_WARNING "cannot load conntrack support for " "address family %u\n", par->family); |