[IPV6]: Per-interface statistics support.

For IP MIB (RFC4293).

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 27 insertions, 13 deletions

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index ebf54ae90a0..ad0b8abcdf4 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -60,14 +60,22 @@ 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;
+        }
+
+        rcu_read_lock();
 
-        IP6_INC_STATS_BH(IPSTATS_MIB_INRECEIVES);
+        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;
         }
 
@@ -104,7 +112,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
                 if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
                         goto truncated;
                 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 +120,21 @@ 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);
+        IP6_INC_STATS_BH(idev, 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 +152,7 @@ static inline int ip6_input_finish(struct sk_buff *skb)
         unsigned int nhoff;
         int nexthdr;
         u8 hash;
+        struct inet6_dev *idev;
 
         /*
          *      Parse extension headers
@@ -147,6 +160,7 @@ 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;
@@ -185,24 +199,24 @@ resubmit:
                 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);
                         }
                 } 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 +233,7 @@ 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))) ||