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authorHeng Guo <heng.guo@windriver.com>2023-08-25 15:55:05 +0800
committerDavid S. Miller <davem@davemloft.net>2023-08-30 09:44:09 +0100
commite4da8c78973c1e307c0431e0b99a969ffb8aa3f1 (patch)
tree9858c454a8dc159ef4db96143460b2af286c86e4
parentbd6c11bc43c496cddfc6cf603b5d45365606dbd5 (diff)
net: ipv4, ipv6: fix IPSTATS_MIB_OUTOCTETS increment duplicated
commit edf391ff1723 ("snmp: add missing counters for RFC 4293") had already added OutOctets for RFC 4293. In commit 2d8dbb04c63e ("snmp: fix OutOctets counter to include forwarded datagrams"), OutOctets was counted again, but not removed from ip_output(). According to RFC 4293 "3.2.3. IP Statistics Tables", ipipIfStatsOutTransmits is not equal to ipIfStatsOutForwDatagrams. So "IPSTATS_MIB_OUTOCTETS must be incremented when incrementing" is not accurate. And IPSTATS_MIB_OUTOCTETS should be counted after fragment. This patch reverts commit 2d8dbb04c63e ("snmp: fix OutOctets counter to include forwarded datagrams") and move IPSTATS_MIB_OUTOCTETS to ip_finish_output2 for ipv4. Reviewed-by: Filip Pudak <filip.pudak@windriver.com> Signed-off-by: Heng Guo <heng.guo@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/ip_forward.c1
-rw-r--r--net/ipv4/ip_output.c7
-rw-r--r--net/ipv4/ipmr.c1
-rw-r--r--net/ipv6/ip6_output.c1
-rw-r--r--net/ipv6/ip6mr.c2
5 files changed, 3 insertions, 9 deletions
diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index e18931a6d153..66fac1216d46 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -67,7 +67,6 @@ static int ip_forward_finish(struct net *net, struct sock *sk, struct sk_buff *s
struct ip_options *opt = &(IPCB(skb)->opt);
__IP_INC_STATS(net, IPSTATS_MIB_OUTFORWDATAGRAMS);
- __IP_ADD_STATS(net, IPSTATS_MIB_OUTOCTETS, skb->len);
#ifdef CONFIG_NET_SWITCHDEV
if (skb->offload_l3_fwd_mark) {
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 43ba4b77b248..b2e0ad312028 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -207,6 +207,9 @@ static int ip_finish_output2(struct net *net, struct sock *sk, struct sk_buff *s
} else if (rt->rt_type == RTN_BROADCAST)
IP_UPD_PO_STATS(net, IPSTATS_MIB_OUTBCAST, skb->len);
+ /* OUTOCTETS should be counted after fragment */
+ IP_UPD_PO_STATS(net, IPSTATS_MIB_OUT, skb->len);
+
if (unlikely(skb_headroom(skb) < hh_len && dev->header_ops)) {
skb = skb_expand_head(skb, hh_len);
if (!skb)
@@ -366,8 +369,6 @@ int ip_mc_output(struct net *net, struct sock *sk, struct sk_buff *skb)
/*
* If the indicated interface is up and running, send the packet.
*/
- IP_UPD_PO_STATS(net, IPSTATS_MIB_OUT, skb->len);
-
skb->dev = dev;
skb->protocol = htons(ETH_P_IP);
@@ -424,8 +425,6 @@ int ip_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
struct net_device *dev = skb_dst(skb)->dev, *indev = skb->dev;
- IP_UPD_PO_STATS(net, IPSTATS_MIB_OUT, skb->len);
-
skb->dev = dev;
skb->protocol = htons(ETH_P_IP);
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 3f0c6d602fb7..9e222a57bc2b 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1804,7 +1804,6 @@ static inline int ipmr_forward_finish(struct net *net, struct sock *sk,
struct ip_options *opt = &(IPCB(skb)->opt);
IP_INC_STATS(net, IPSTATS_MIB_OUTFORWDATAGRAMS);
- IP_ADD_STATS(net, 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 0665e8b09968..4ab50169a5a9 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -451,7 +451,6 @@ static inline int ip6_forward_finish(struct net *net, struct sock *sk,
struct dst_entry *dst = skb_dst(skb);
__IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_OUTFORWDATAGRAMS);
- __IP6_ADD_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_OUTOCTETS, skb->len);
#ifdef CONFIG_NET_SWITCHDEV
if (skb->offload_l3_fwd_mark) {
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 67a3b8f6e72b..30ca064b76ef 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -2010,8 +2010,6 @@ static inline int ip6mr_forward2_finish(struct net *net, struct sock *sk, struct
{
IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
IPSTATS_MIB_OUTFORWDATAGRAMS);
- IP6_ADD_STATS(net, ip6_dst_idev(skb_dst(skb)),
- IPSTATS_MIB_OUTOCTETS, skb->len);
return dst_output(net, sk, skb);
}