[IPV6]: Per-interface statistics support.

For IP MIB (RFC4293).

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

1 files changed, 39 insertions, 26 deletions

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index f39bbed..3af0d5a 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -47,6 +47,7 @@
 #include <net/snmp.h>
 
 #include <net/ipv6.h>
+#include <net/ip6_route.h>
 #include <net/protocol.h>
 #include <net/transp_v6.h>
 #include <net/rawv6.h>
@@ -257,7 +258,7 @@ static __inline__ void fq_kill(struct frag_queue *fq)
 	}
 }
 
-static void ip6_evictor(void)
+static void ip6_evictor(struct inet6_dev *idev)
 {
 	struct frag_queue *fq;
 	struct list_head *tmp;
@@ -284,14 +285,14 @@ static void ip6_evictor(void)
 		spin_unlock(&fq->lock);
 
 		fq_put(fq, &work);
-		IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS);
+		IP6_INC_STATS_BH(idev, IPSTATS_MIB_REASMFAILS);
 	}
 }
 
 static void ip6_frag_expire(unsigned long data)
 {
 	struct frag_queue *fq = (struct frag_queue *) data;
-	struct net_device *dev;
+	struct net_device *dev = NULL;
 
 	spin_lock(&fq->lock);
 
@@ -300,17 +301,19 @@ static void ip6_frag_expire(unsigned long data)
 
 	fq_kill(fq);
 
-	IP6_INC_STATS_BH(IPSTATS_MIB_REASMTIMEOUT);
-	IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS);
+	dev = dev_get_by_index(fq->iif);
+	if (!dev)
+		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);
+	rcu_read_unlock();
 
 	/* Don't send error if the first segment did not arrive. */
 	if (!(fq->last_in&FIRST_IN) || !fq->fragments)
 		goto out;
 
-	dev = dev_get_by_index(fq->iif);
-	if (!dev)
-		goto out;
-
 	/*
 	   But use as source device on which LAST ARRIVED
 	   segment was received. And do not use fq->dev
@@ -318,8 +321,9 @@ static void ip6_frag_expire(unsigned long data)
 	 */
 	fq->fragments->dev = dev;
 	icmpv6_send(fq->fragments, ICMPV6_TIME_EXCEED, ICMPV6_EXC_FRAGTIME, 0, dev);
-	dev_put(dev);
 out:
+	if (dev)
+		dev_put(dev);
 	spin_unlock(&fq->lock);
 	fq_put(fq, NULL);
 }
@@ -366,7 +370,8 @@ static struct frag_queue *ip6_frag_intern(struct frag_queue *fq_in)
 
 
 static struct frag_queue *
-ip6_frag_create(u32 id, struct in6_addr *src, struct in6_addr *dst)
+ip6_frag_create(u32 id, struct in6_addr *src, struct in6_addr *dst,
+		struct inet6_dev *idev)
 {
 	struct frag_queue *fq;
 
@@ -386,12 +391,13 @@ ip6_frag_create(u32 id, struct in6_addr *src, struct in6_addr *dst)
 	return ip6_frag_intern(fq);
 
 oom:
-	IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS);
+	IP6_INC_STATS_BH(idev, IPSTATS_MIB_REASMFAILS);
 	return NULL;
 }
 
 static __inline__ struct frag_queue *
-fq_find(u32 id, struct in6_addr *src, struct in6_addr *dst)
+fq_find(u32 id, struct in6_addr *src, struct in6_addr *dst,
+	struct inet6_dev *idev)
 {
 	struct frag_queue *fq;
 	struct hlist_node *n;
@@ -410,7 +416,7 @@ fq_find(u32 id, struct in6_addr *src, struct in6_addr *dst)
 	}
 	read_unlock(&ip6_frag_lock);
 
-	return ip6_frag_create(id, src, dst);
+	return ip6_frag_create(id, src, dst, idev);
 }
 
 
@@ -428,7 +434,8 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
 			((u8 *) (fhdr + 1) - (u8 *) (skb->nh.ipv6h + 1)));
 
 	if ((unsigned int)end > IPV6_MAXPLEN) {
-		IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+		IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+				 IPSTATS_MIB_INHDRERRORS);
  		icmpv6_param_prob(skb,ICMPV6_HDR_FIELD, (u8*)&fhdr->frag_off - skb->nh.raw);
  		return;
 	}
@@ -455,7 +462,8 @@ static void 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(IPSTATS_MIB_INHDRERRORS);
+			IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+					 IPSTATS_MIB_INHDRERRORS);
 			icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, 
 					  offsetof(struct ipv6hdr, payload_len));
 			return;
@@ -571,7 +579,7 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
 	return;
 
 err:
-	IP6_INC_STATS(IPSTATS_MIB_REASMFAILS);
+	IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
 	kfree_skb(skb);
 }
 
@@ -665,7 +673,9 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff **skb_in,
 	if (head->ip_summed == CHECKSUM_COMPLETE)
 		head->csum = csum_partial(head->nh.raw, head->h.raw-head->nh.raw, head->csum);
 
-	IP6_INC_STATS_BH(IPSTATS_MIB_REASMOKS);
+	rcu_read_lock();
+	IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMOKS);
+	rcu_read_unlock();
 	fq->fragments = NULL;
 	return 1;
 
@@ -677,7 +687,9 @@ out_oom:
 	if (net_ratelimit())
 		printk(KERN_DEBUG "ip6_frag_reasm: no memory for reassembly\n");
 out_fail:
-	IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS);
+	rcu_read_lock();
+	IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);
+	rcu_read_unlock();
 	return -1;
 }
 
@@ -691,16 +703,16 @@ static int ipv6_frag_rcv(struct sk_buff **skbp)
 
 	hdr = skb->nh.ipv6h;
 
-	IP6_INC_STATS_BH(IPSTATS_MIB_REASMREQDS);
+	IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMREQDS);
 
 	/* Jumbo payload inhibits frag. header */
 	if (hdr->payload_len==0) {
-		IP6_INC_STATS(IPSTATS_MIB_INHDRERRORS);
+		IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb->h.raw-skb->nh.raw);
 		return -1;
 	}
 	if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+sizeof(struct frag_hdr))) {
-		IP6_INC_STATS(IPSTATS_MIB_INHDRERRORS);
+		IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb->h.raw-skb->nh.raw);
 		return -1;
 	}
@@ -711,16 +723,17 @@ static int ipv6_frag_rcv(struct sk_buff **skbp)
 	if (!(fhdr->frag_off & htons(0xFFF9))) {
 		/* It is not a fragmented frame */
 		skb->h.raw += sizeof(struct frag_hdr);
-		IP6_INC_STATS_BH(IPSTATS_MIB_REASMOKS);
+		IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMOKS);
 
 		IP6CB(skb)->nhoff = (u8*)fhdr - skb->nh.raw;
 		return 1;
 	}
 
 	if (atomic_read(&ip6_frag_mem) > sysctl_ip6frag_high_thresh)
-		ip6_evictor();
+		ip6_evictor(ip6_dst_idev(skb->dst));
 
-	if ((fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr)) != NULL) {
+	if ((fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr,
+			  ip6_dst_idev(skb->dst))) != NULL) {
 		int ret = -1;
 
 		spin_lock(&fq->lock);
@@ -736,7 +749,7 @@ static int ipv6_frag_rcv(struct sk_buff **skbp)
 		return ret;
 	}
 
-	IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS);
+	IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
 	kfree_skb(skb);
 	return -1;
 }