Linux 2.6.28-rc1

[linux-2.6-omap-h63xx.git] / net / ipv6 / reassembly.c

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 89184b576e2377f1190c69a36476d320e263c265..af12de071f4c524c3f6349d982d7fd3dbb97e5a6 100644 (file)
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -99,8 +99,8 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
  * callers should be careful not to use the hash value outside the ipfrag_lock
  * as doing so could race with ipfrag_hash_rnd being recalculated.
  */
-static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
-                              struct in6_addr *daddr)
+unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
+                            const struct in6_addr *daddr, u32 rnd)
 {
        u32 a, b, c;
 
@@ -110,7 +110,7 @@ static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
 
        a += JHASH_GOLDEN_RATIO;
        b += JHASH_GOLDEN_RATIO;
-       c += ip6_frags.rnd;
+       c += rnd;
        __jhash_mix(a, b, c);
 
        a += (__force u32)saddr->s6_addr32[3];
@@ -125,13 +125,14 @@ static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
 
        return c & (INETFRAGS_HASHSZ - 1);
 }
+EXPORT_SYMBOL_GPL(inet6_hash_frag);
 
 static unsigned int ip6_hashfn(struct inet_frag_queue *q)
 {
        struct frag_queue *fq;
 
        fq = container_of(q, struct frag_queue, q);
-       return ip6qhashfn(fq->id, &fq->saddr, &fq->daddr);
+       return inet6_hash_frag(fq->id, &fq->saddr, &fq->daddr, ip6_frags.rnd);
 }
 
 int ip6_frag_match(struct inet_frag_queue *q, void *a)
@@ -188,7 +189,7 @@ static void ip6_evictor(struct net *net, struct inet6_dev *idev)
 
        evicted = inet_frag_evictor(&net->ipv6.frags, &ip6_frags);
        if (evicted)
-               IP6_ADD_STATS_BH(idev, IPSTATS_MIB_REASMFAILS, evicted);
+               IP6_ADD_STATS_BH(net, idev, IPSTATS_MIB_REASMFAILS, evicted);
 }
 
 static void ip6_frag_expire(unsigned long data)
@@ -212,8 +213,8 @@ static void ip6_frag_expire(unsigned long data)
                goto out;
 
        rcu_read_lock();
-       IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMTIMEOUT);
-       IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);
+       IP6_INC_STATS_BH(net, __in6_dev_get(dev), IPSTATS_MIB_REASMTIMEOUT);
+       IP6_INC_STATS_BH(net, __in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);
        rcu_read_unlock();
 
        /* Don't send error if the first segment did not arrive. */
@@ -247,7 +248,7 @@ fq_find(struct net *net, __be32 id, struct in6_addr *src, struct in6_addr *dst,
        arg.dst = dst;
 
        read_lock(&ip6_frags.lock);
-       hash = ip6qhashfn(id, src, dst);
+       hash = inet6_hash_frag(id, src, dst, ip6_frags.rnd);
 
        q = inet_frag_find(&net->ipv6.frags, &ip6_frags, &arg, hash);
        if (q == NULL)
@@ -256,7 +257,7 @@ fq_find(struct net *net, __be32 id, struct in6_addr *src, struct in6_addr *dst,
        return container_of(q, struct frag_queue, q);
 
 oom:
-       IP6_INC_STATS_BH(idev, IPSTATS_MIB_REASMFAILS);
+       IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_REASMFAILS);
        return NULL;
 }
 
@@ -266,6 +267,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
        struct sk_buff *prev, *next;
        struct net_device *dev;
        int offset, end;
+       struct net *net = dev_net(skb->dst->dev);
 
        if (fq->q.last_in & INET_FRAG_COMPLETE)
                goto err;
@@ -275,7 +277,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
                        ((u8 *)(fhdr + 1) - (u8 *)(ipv6_hdr(skb) + 1)));
 
        if ((unsigned int)end > IPV6_MAXPLEN) {
-               IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+               IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
                                 IPSTATS_MIB_INHDRERRORS);
                icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
                                  ((u8 *)&fhdr->frag_off -
@@ -308,7 +310,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
                        /* RFC2460 says always send parameter problem in
                         * this case. -DaveM
                         */
-                       IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
                                         IPSTATS_MIB_INHDRERRORS);
                        icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
                                          offsetof(struct ipv6hdr, payload_len));
@@ -432,7 +434,8 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
        return -1;
 
 err:
-       IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
+       IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+                     IPSTATS_MIB_REASMFAILS);
        kfree_skb(skb);
        return -1;
 }
@@ -548,7 +551,8 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
                                          head->csum);
 
        rcu_read_lock();
-       IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMOKS);
+       IP6_INC_STATS_BH(dev_net(dev),
+                        __in6_dev_get(dev), IPSTATS_MIB_REASMOKS);
        rcu_read_unlock();
        fq->q.fragments = NULL;
        return 1;
@@ -562,7 +566,8 @@ out_oom:
                printk(KERN_DEBUG "ip6_frag_reasm: no memory for reassembly\n");
 out_fail:
        rcu_read_lock();
-       IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);
+       IP6_INC_STATS_BH(dev_net(dev),
+                        __in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);
        rcu_read_unlock();
        return -1;
 }
@@ -572,24 +577,17 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
        struct frag_hdr *fhdr;
        struct frag_queue *fq;
        struct ipv6hdr *hdr = ipv6_hdr(skb);
-       struct net *net;
+       struct net *net = dev_net(skb->dst->dev);
 
-       IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMREQDS);
+       IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMREQDS);
 
        /* Jumbo payload inhibits frag. header */
-       if (hdr->payload_len==0) {
-               IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
-               icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
-                                 skb_network_header_len(skb));
-               return -1;
-       }
+       if (hdr->payload_len==0)
+               goto fail_hdr;
+
        if (!pskb_may_pull(skb, (skb_transport_offset(skb) +
-                                sizeof(struct frag_hdr)))) {
-               IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
-               icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
-                                 skb_network_header_len(skb));
-               return -1;
-       }
+                                sizeof(struct frag_hdr))))
+               goto fail_hdr;
 
        hdr = ipv6_hdr(skb);
        fhdr = (struct frag_hdr *)skb_transport_header(skb);
@@ -597,13 +595,13 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
        if (!(fhdr->frag_off & htons(0xFFF9))) {
                /* It is not a fragmented frame */
                skb->transport_header += sizeof(struct frag_hdr);
-               IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMOKS);
+               IP6_INC_STATS_BH(net,
+                                ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMOKS);
 
                IP6CB(skb)->nhoff = (u8 *)fhdr - skb_network_header(skb);
                return 1;
        }
 
-       net = dev_net(skb->dev);
        if (atomic_read(&net->ipv6.frags.mem) > net->ipv6.frags.high_thresh)
                ip6_evictor(net, ip6_dst_idev(skb->dst));
 
@@ -620,9 +618,14 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
                return ret;
        }
 
-       IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
+       IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
        kfree_skb(skb);
        return -1;
+
+fail_hdr:
+       IP6_INC_STATS(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
+       icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb_network_header_len(skb));
+       return -1;
 }
 
 static struct inet6_protocol frag_protocol =