mac80211: move netdev queue enabling to correct spot

[safe/jmp/linux-2.6] / net / netfilter / xt_NFQUEUE.c

diff --git a/net/netfilter/xt_NFQUEUE.c b/net/netfilter/xt_NFQUEUE.c
index f9977b3..12dcd70 100644 (file)
--- a/net/netfilter/xt_NFQUEUE.c
+++ b/net/netfilter/xt_NFQUEUE.c
@@ -11,6 +11,10 @@
 #include <linux/module.h>
 #include <linux/skbuff.h>
 
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/jhash.h>
+
 #include <linux/netfilter.h>
 #include <linux/netfilter_arp.h>
 #include <linux/netfilter/x_tables.h>
@@ -23,6 +27,9 @@ MODULE_ALIAS("ipt_NFQUEUE");
 MODULE_ALIAS("ip6t_NFQUEUE");
 MODULE_ALIAS("arpt_NFQUEUE");
 
+static u32 jhash_initval __read_mostly;
+static bool rnd_inited __read_mostly;
+
 static unsigned int
 nfqueue_tg(struct sk_buff *skb, const struct xt_target_param *par)
 {
@@ -31,28 +38,104 @@ nfqueue_tg(struct sk_buff *skb, const struct xt_target_param *par)
        return NF_QUEUE_NR(tinfo->queuenum);
 }
 
+static u32 hash_v4(const struct sk_buff *skb)
+{
+       const struct iphdr *iph = ip_hdr(skb);
+       __be32 ipaddr;
+
+       /* packets in either direction go into same queue */
+       ipaddr = iph->saddr ^ iph->daddr;
+
+       return jhash_2words((__force u32)ipaddr, iph->protocol, jhash_initval);
+}
+
+static unsigned int
+nfqueue_tg4_v1(struct sk_buff *skb, const struct xt_target_param *par)
+{
+       const struct xt_NFQ_info_v1 *info = par->targinfo;
+       u32 queue = info->queuenum;
+
+       if (info->queues_total > 1)
+               queue = hash_v4(skb) % info->queues_total + queue;
+       return NF_QUEUE_NR(queue);
+}
+
+#if defined(CONFIG_IP6_NF_IPTABLES) || defined(CONFIG_IP6_NF_IPTABLES_MODULE)
+static u32 hash_v6(const struct sk_buff *skb)
+{
+       const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+       __be32 addr[4];
+
+       addr[0] = ip6h->saddr.s6_addr32[0] ^ ip6h->daddr.s6_addr32[0];
+       addr[1] = ip6h->saddr.s6_addr32[1] ^ ip6h->daddr.s6_addr32[1];
+       addr[2] = ip6h->saddr.s6_addr32[2] ^ ip6h->daddr.s6_addr32[2];
+       addr[3] = ip6h->saddr.s6_addr32[3] ^ ip6h->daddr.s6_addr32[3];
+
+       return jhash2((__force u32 *)addr, ARRAY_SIZE(addr), jhash_initval);
+}
+
+static unsigned int
+nfqueue_tg6_v1(struct sk_buff *skb, const struct xt_target_param *par)
+{
+       const struct xt_NFQ_info_v1 *info = par->targinfo;
+       u32 queue = info->queuenum;
+
+       if (info->queues_total > 1)
+               queue = hash_v6(skb) % info->queues_total + queue;
+       return NF_QUEUE_NR(queue);
+}
+#endif
+
+static bool nfqueue_tg_v1_check(const struct xt_tgchk_param *par)
+{
+       const struct xt_NFQ_info_v1 *info = par->targinfo;
+       u32 maxid;
+
+       if (unlikely(!rnd_inited)) {
+               get_random_bytes(&jhash_initval, sizeof(jhash_initval));
+               rnd_inited = true;
+       }
+       if (info->queues_total == 0) {
+               pr_err("NFQUEUE: number of total queues is 0\n");
+               return false;
+       }
+       maxid = info->queues_total - 1 + info->queuenum;
+       if (maxid > 0xffff) {
+               pr_err("NFQUEUE: number of queues (%u) out of range (got %u)\n",
+                      info->queues_total, maxid);
+               return false;
+       }
+       return true;
+}
+
 static struct xt_target nfqueue_tg_reg[] __read_mostly = {
        {
                .name           = "NFQUEUE",
-               .family         = NFPROTO_IPV4,
+               .family         = NFPROTO_UNSPEC,
                .target         = nfqueue_tg,
                .targetsize     = sizeof(struct xt_NFQ_info),
                .me             = THIS_MODULE,
        },
        {
                .name           = "NFQUEUE",
-               .family         = NFPROTO_IPV6,
-               .target         = nfqueue_tg,
-               .targetsize     = sizeof(struct xt_NFQ_info),
+               .revision       = 1,
+               .family         = NFPROTO_IPV4,
+               .checkentry     = nfqueue_tg_v1_check,
+               .target         = nfqueue_tg4_v1,
+               .targetsize     = sizeof(struct xt_NFQ_info_v1),
                .me             = THIS_MODULE,
        },
+#if defined(CONFIG_IP6_NF_IPTABLES) || defined(CONFIG_IP6_NF_IPTABLES_MODULE)
        {
                .name           = "NFQUEUE",
-               .family         = NFPROTO_ARP,
-               .target         = nfqueue_tg,
-               .targetsize     = sizeof(struct xt_NFQ_info),
+               .revision       = 1,
+               .family         = NFPROTO_IPV6,
+               .checkentry     = nfqueue_tg_v1_check,
+               .target         = nfqueue_tg6_v1,
+               .targetsize     = sizeof(struct xt_NFQ_info_v1),
                .me             = THIS_MODULE,
        },
+#endif
 };
 
 static int __init nfqueue_tg_init(void)