[SK_BUFF]: Introduce skb_network_header()

[powerpc.git] / net / ipv6 / ip6_input.c

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 6b8e6d7..aecc74d 100644 (file)
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -1,6 +1,6 @@
 /*
  *     IPv6 input
- *     Linux INET6 implementation 
+ *     Linux INET6 implementation
  *
  *     Authors:
  *     Pedro Roque             <roque@di.fc.ul.pt>
@@ -25,7 +25,6 @@
 #include <linux/types.h>
 #include <linux/socket.h>
 #include <linux/sockios.h>
-#include <linux/sched.h>
 #include <linux/net.h>
 #include <linux/netdevice.h>
 #include <linux/in6.h>
@@ -48,7 +47,7 @@
 
 
 
-inline int ip6_rcv_finish( struct sk_buff *skb) 
+inline int ip6_rcv_finish( struct sk_buff *skb)
 {
        if (skb->dst == NULL)
                ip6_route_input(skb);
@@ -60,14 +59,22 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 {
        struct ipv6hdr *hdr;
        u32             pkt_len;
+       struct inet6_dev *idev;
 
-       if (skb->pkt_type == PACKET_OTHERHOST)
-               goto drop;
+       if (skb->pkt_type == PACKET_OTHERHOST) {
+               kfree_skb(skb);
+               return 0;
+       }
 
-       IP6_INC_STATS_BH(IPSTATS_MIB_INRECEIVES);
+       rcu_read_lock();
+
+       idev = __in6_dev_get(skb->dev);
+
+       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INRECEIVES);
 
        if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
-               IP6_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
+               IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDISCARDS);
+               rcu_read_unlock();
                goto out;
        }
 
@@ -84,7 +91,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
         * arrived via the sending interface (ethX), because of the
         * nature of scoping architecture. --yoshfuji
         */
-       IP6CB(skb)->iif = skb->dst ? ((struct rt6_info *)skb->dst)->rt6i_idev->dev->ifindex : dev->ifindex;
+       IP6CB(skb)->iif = skb->dst ? ip6_dst_idev(skb->dst)->dev->ifindex : dev->ifindex;
 
        if (unlikely(!pskb_may_pull(skb, sizeof(*hdr))))
                goto err;
@@ -101,10 +108,12 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 
        /* pkt_len may be zero if Jumbo payload option is present */
        if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
-               if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
-                       goto truncated;
+               if (pkt_len + sizeof(struct ipv6hdr) > skb->len) {
+                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INTRUNCATEDPKTS);
+                       goto drop;
+               }
                if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr))) {
-                       IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INHDRERRORS);
                        goto drop;
                }
                hdr = skb->nh.ipv6h;
@@ -112,17 +121,19 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 
        if (hdr->nexthdr == NEXTHDR_HOP) {
                if (ipv6_parse_hopopts(&skb) < 0) {
-                       IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INHDRERRORS);
+                       rcu_read_unlock();
                        return 0;
                }
        }
 
+       rcu_read_unlock();
+
        return NF_HOOK(PF_INET6,NF_IP6_PRE_ROUTING, skb, dev, NULL, ip6_rcv_finish);
-truncated:
-       IP6_INC_STATS_BH(IPSTATS_MIB_INTRUNCATEDPKTS);
 err:
-       IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INHDRERRORS);
 drop:
+       rcu_read_unlock();
        kfree_skb(skb);
 out:
        return 0;
@@ -140,6 +151,7 @@ static inline int ip6_input_finish(struct sk_buff *skb)
        unsigned int nhoff;
        int nexthdr;
        u8 hash;
+       struct inet6_dev *idev;
 
        /*
         *      Parse extension headers
@@ -147,10 +159,11 @@ static inline int ip6_input_finish(struct sk_buff *skb)
 
        rcu_read_lock();
 resubmit:
+       idev = ip6_dst_idev(skb->dst);
        if (!pskb_pull(skb, skb->h.raw - skb->data))
                goto discard;
        nhoff = IP6CB(skb)->nhoff;
-       nexthdr = skb->nh.raw[nhoff];
+       nexthdr = skb_network_header(skb)[nhoff];
 
        raw_sk = sk_head(&raw_v6_htable[nexthdr & (MAX_INET_PROTOS - 1)]);
        if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
@@ -159,16 +172,16 @@ resubmit:
        hash = nexthdr & (MAX_INET_PROTOS - 1);
        if ((ipprot = rcu_dereference(inet6_protos[hash])) != NULL) {
                int ret;
-               
+
                if (ipprot->flags & INET6_PROTO_FINAL) {
-                       struct ipv6hdr *hdr;    
+                       struct ipv6hdr *hdr;
 
                        /* Free reference early: we don't need it any more,
                           and it may hold ip_conntrack module loaded
                           indefinitely. */
                        nf_reset(skb);
 
-                       skb_postpull_rcsum(skb, skb->nh.raw,
+                       skb_postpull_rcsum(skb, skb_network_header(skb),
                                           skb->h.raw - skb->nh.raw);
                        hdr = skb->nh.ipv6h;
                        if (ipv6_addr_is_multicast(&hdr->daddr) &&
@@ -178,31 +191,31 @@ resubmit:
                                goto discard;
                }
                if (!(ipprot->flags & INET6_PROTO_NOPOLICY) &&
-                   !xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) 
+                   !xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
                        goto discard;
-               
+
                ret = ipprot->handler(&skb);
                if (ret > 0)
                        goto resubmit;
                else if (ret == 0)
-                       IP6_INC_STATS_BH(IPSTATS_MIB_INDELIVERS);
+                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDELIVERS);
        } else {
                if (!raw_sk) {
                        if (xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
-                               IP6_INC_STATS_BH(IPSTATS_MIB_INUNKNOWNPROTOS);
+                               IP6_INC_STATS_BH(idev, IPSTATS_MIB_INUNKNOWNPROTOS);
                                icmpv6_send(skb, ICMPV6_PARAMPROB,
-                                           ICMPV6_UNK_NEXTHDR, nhoff,
-                                           skb->dev);
+                                           ICMPV6_UNK_NEXTHDR, nhoff,
+                                           skb->dev);
                        }
                } else
-                       IP6_INC_STATS_BH(IPSTATS_MIB_INDELIVERS);
+                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDELIVERS);
                kfree_skb(skb);
        }
        rcu_read_unlock();
        return 0;
 
 discard:
-       IP6_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
+       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDISCARDS);
        rcu_read_unlock();
        kfree_skb(skb);
        return 0;
@@ -219,7 +232,7 @@ int ip6_mc_input(struct sk_buff *skb)
        struct ipv6hdr *hdr;
        int deliver;
 
-       IP6_INC_STATS_BH(IPSTATS_MIB_INMCASTPKTS);
+       IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_INMCASTPKTS);
 
        hdr = skb->nh.ipv6h;
        deliver = likely(!(skb->dev->flags & (IFF_PROMISC|IFF_ALLMULTI))) ||
@@ -239,7 +252,7 @@ int ip6_mc_input(struct sk_buff *skb)
                        struct dst_entry *dst;
 
                        dst = skb->dst;
-                       
+
                        if (deliver) {
                                skb2 = skb_clone(skb, GFP_ATOMIC);
                                dst_output(skb2);