commit a11d206d0f88e092419877c7f706cafb5e1c2e57
author YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Sat Nov 04 20:11:37 2006 +0900
committer David S. Miller <davem@sunset.davemloft.net> Sat Dec 02 21:22:08 2006 -0800
tree ed96428bb52765198d5c5b7ccbc1f1b6516ffb3f
parent 7a3025b1b3a0173be5de6ced18754b909da27b38

[IPV6]: Per-interface statistics support.

For IP MIB (RFC4293).

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

net/ipv6/ip6_input.c

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index ebf54ae..ad0b8ab 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -60,14 +60,22 @@
 {
 	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;
 	}
 
@@ -104,7 +112,7 @@
 		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 @@
 
 	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 @@
 	unsigned int nhoff;
 	int nexthdr;
 	u8 hash;
+	struct inet6_dev *idev;
 
 	/*
 	 *	Parse extension headers
@@ -147,6 +160,7 @@
 
 	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 @@
 		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 @@
 	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))) ||