From: Jeffrey Ji <jeffreyjilinux@gmail•com>
To: Eric Dumazet <edumazet@google•com>,
"David S . Miller" <davem@davemloft•net>
Cc: Brian Vazquez <brianvv@google•com>,
linux-kernel@vger•kernel.org, netdev@vger•kernel.org,
jeffreyjilinux@gmail•com, jeffreyji <jeffreyji@google•com>
Subject: [PATCH net-next] net-core: add InMacErrors counter
Date: Sat, 22 Jan 2022 00:03:01 +0000 [thread overview]
Message-ID: <20220122000301.1872828-1-jeffreyji@google.com> (raw)
From: jeffreyji <jeffreyji@google•com>
Increment InMacErrors counter when packet dropped due to incorrect dest
MAC addr.
example output from nstat:
\~# nstat -z "*InMac*"
\#kernel
Ip6InMacErrors 0 0.0
IpExtInMacErrors 1 0.0
Tested: Created 2 netns, sent 1 packet using trafgen from 1 to the other
with "{eth(daddr=$INCORRECT_MAC...}", verified that nstat showed the
counter was incremented.
Signed-off-by: jeffreyji <jeffreyji@google•com>
---
include/uapi/linux/snmp.h | 1 +
net/ipv4/ip_input.c | 4 +++-
net/ipv4/proc.c | 1 +
net/ipv6/ip6_input.c | 1 +
net/ipv6/proc.c | 1 +
5 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/snmp.h b/include/uapi/linux/snmp.h
index 904909d020e2..ac2fac12dd7d 100644
--- a/include/uapi/linux/snmp.h
+++ b/include/uapi/linux/snmp.h
@@ -57,6 +57,7 @@ enum
IPSTATS_MIB_ECT0PKTS, /* InECT0Pkts */
IPSTATS_MIB_CEPKTS, /* InCEPkts */
IPSTATS_MIB_REASM_OVERLAPS, /* ReasmOverlaps */
+ IPSTATS_MIB_INMACERRORS, /* InMacErrors */
__IPSTATS_MIB_MAX
};
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 3a025c011971..0961585f7c02 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -441,8 +441,10 @@ static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net)
/* When the interface is in promisc. mode, drop all the crap
* that it receives, do not try to analyse it.
*/
- if (skb->pkt_type == PACKET_OTHERHOST)
+ if (skb->pkt_type == PACKET_OTHERHOST) {
+ __IP_INC_STATS(net, IPSTATS_MIB_INMACERRORS);
goto drop;
+ }
__IP_UPD_PO_STATS(net, IPSTATS_MIB_IN, skb->len);
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index f30273afb539..dfe0a1dbf8e9 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -117,6 +117,7 @@ static const struct snmp_mib snmp4_ipextstats_list[] = {
SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
+ SNMP_MIB_ITEM("InMacErrors", IPSTATS_MIB_INMACERRORS),
SNMP_MIB_SENTINEL
};
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 80256717868e..2903869274ca 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -150,6 +150,7 @@ static struct sk_buff *ip6_rcv_core(struct sk_buff *skb, struct net_device *dev,
struct inet6_dev *idev;
if (skb->pkt_type == PACKET_OTHERHOST) {
+ __IP6_INC_STATS(net, idev, IPSTATS_MIB_INMACERRORS);
kfree_skb(skb);
return NULL;
}
diff --git a/net/ipv6/proc.c b/net/ipv6/proc.c
index d6306aa46bb1..76e6119ba558 100644
--- a/net/ipv6/proc.c
+++ b/net/ipv6/proc.c
@@ -84,6 +84,7 @@ static const struct snmp_mib snmp6_ipstats_list[] = {
SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS),
+ SNMP_MIB_ITEM("Ip6InMacErrors", IPSTATS_MIB_INMACERRORS),
SNMP_MIB_SENTINEL
};
--
2.35.0.rc0.227.g00780c9af4-goog
next reply other threads:[~2022-01-22 0:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-22 0:03 Jeffrey Ji [this message]
2022-01-22 3:40 ` [PATCH net-next] net-core: add InMacErrors counter Jakub Kicinski
2022-01-24 17:13 ` Brian Vazquez
2022-01-24 17:29 ` Jakub Kicinski
2022-01-24 17:39 ` Eric Dumazet
2022-01-24 17:46 ` Jakub Kicinski
2022-01-24 20:19 ` Cong Wang
2022-01-24 20:21 ` Eric Dumazet
2022-01-24 22:24 ` kernel test robot
2022-01-24 22:24 ` kernel test robot
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