[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 f39bbedd1327..3af0d5a6ceeb 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;
 }