snmp: fix OutOctets counter to include forwarded datagrams

RFC 4293 defines ipIfStatsOutOctets (similar definition for
ipSystemStatsOutOctets):

   The total number of octets in IP datagrams delivered to the lower
   layers for transmission.  Octets from datagrams counted in
   ipIfStatsOutTransmits MUST be counted here.

And ipIfStatsOutTransmits:

   The total number of IP datagrams that this entity supplied to the
   lower layers for transmission.  This includes datagrams generated
   locally and those forwarded by this entity.

Therefore, IPSTATS_MIB_OUTOCTETS must be incremented when incrementing
IPSTATS_MIB_OUTFORWDATAGRAMS.

IP_UPD_PO_STATS is not used since ipIfStatsOutRequests must not
include forwarded datagrams:

   The total number of IP datagrams that local IP user-protocols
   (including ICMP) supplied to IP in requests for transmission.  Note
   that this counter does not include any datagrams counted in
   ipIfStatsOutForwDatagrams.

Signed-off-by: Vincent Bernat <bernat@luffy.cx>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index e5c44fc586abe7157f8b75b8f164a7222ae8548c..ab09b126423ce3e56fd1fee2f6bda54e4b851022 100644 (file)
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -44,6 +44,7 @@ static int ip_forward_finish(struct sk_buff *skb)
        struct ip_options *opt  = &(IPCB(skb)->opt);
 
        IP_INC_STATS_BH(dev_net(skb_dst(skb)->dev), IPSTATS_MIB_OUTFORWDATAGRAMS);
+       IP_ADD_STATS_BH(dev_net(skb_dst(skb)->dev), IPSTATS_MIB_OUTOCTETS, skb->len);
 
        if (unlikely(opt->optlen))
                ip_forward_options(skb);

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index a9e519ad6db53d544c73d145724602cde1e3f48e..c94bbc6f2ba331bb9e261692151f55f78277258b 100644 (file)
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1574,6 +1574,7 @@ static inline int ipmr_forward_finish(struct sk_buff *skb)
        struct ip_options *opt = &(IPCB(skb)->opt);
 
        IP_INC_STATS_BH(dev_net(skb_dst(skb)->dev), IPSTATS_MIB_OUTFORWDATAGRAMS);
+       IP_ADD_STATS_BH(dev_net(skb_dst(skb)->dev), IPSTATS_MIB_OUTOCTETS, skb->len);
 
        if (unlikely(opt->optlen))
                ip_forward_options(skb);

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 17b8c67998bb80dc5e7052af210c7b64aa1471ee..decc21d19c53e4b0c073b44e02deba46b6eac432 100644 (file)
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -526,6 +526,7 @@ int ip6_forward(struct sk_buff *skb)
        hdr->hop_limit--;
 
        IP6_INC_STATS_BH(net, ip6_dst_idev(dst), IPSTATS_MIB_OUTFORWDATAGRAMS);
+       IP6_ADD_STATS_BH(net, ip6_dst_idev(dst), IPSTATS_MIB_OUTOCTETS, skb->len);
        return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD, skb, skb->dev, dst->dev,
                       ip6_forward_finish);
 

diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index b15dc08643a42f5a45ea9bb0bd2bd0ec1865a377..461e47c8e95620456e83710eaf99643c1382c8fc 100644 (file)
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1886,6 +1886,8 @@ static inline int ip6mr_forward2_finish(struct sk_buff *skb)
 {
        IP6_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)),
                         IPSTATS_MIB_OUTFORWDATAGRAMS);
+       IP6_ADD_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)),
+                        IPSTATS_MIB_OUTOCTETS, skb->len);
        return dst_output(skb);
 }