net: Add MIB counters for checksum errors

Add MIB counters for checksum errors in IP layer,
and TCP/UDP/ICMP layers, to help diagnose problems.

$ nstat -a | grep  Csum
IcmpInCsumErrors                72                 0.0
TcpInCsumErrors                 382                0.0
UdpInCsumErrors                 463221             0.0
Icmp6InCsumErrors               75                 0.0
Udp6InCsumErrors                173442             0.0
IpExtInCsumErrors               10884              0.0

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/uapi/linux/snmp.h b/include/uapi/linux/snmp.h
index fefdec91c68b..df2e8b4f9c03 100644
--- a/include/uapi/linux/snmp.h
+++ b/include/uapi/linux/snmp.h
@@ -50,6 +50,7 @@ enum
         IPSTATS_MIB_OUTMCASTOCTETS,             /* OutMcastOctets */
         IPSTATS_MIB_INBCASTOCTETS,              /* InBcastOctets */
         IPSTATS_MIB_OUTBCASTOCTETS,             /* OutBcastOctets */
+        IPSTATS_MIB_CSUMERRORS,                 /* InCsumErrors */
         __IPSTATS_MIB_MAX
 };
 
@@ -87,6 +88,7 @@ enum
         ICMP_MIB_OUTTIMESTAMPREPS,              /* OutTimestampReps */
         ICMP_MIB_OUTADDRMASKS,                  /* OutAddrMasks */
         ICMP_MIB_OUTADDRMASKREPS,               /* OutAddrMaskReps */
+        ICMP_MIB_CSUMERRORS,                    /* InCsumErrors */
         __ICMP_MIB_MAX
 };
 
@@ -103,6 +105,7 @@ enum
         ICMP6_MIB_INERRORS,                     /* InErrors */
         ICMP6_MIB_OUTMSGS,                      /* OutMsgs */
         ICMP6_MIB_OUTERRORS,                    /* OutErrors */
+        ICMP6_MIB_CSUMERRORS,                   /* InCsumErrors */
         __ICMP6_MIB_MAX
 };
 
@@ -130,6 +133,7 @@ enum
         TCP_MIB_RETRANSSEGS,                    /* RetransSegs */
         TCP_MIB_INERRS,                         /* InErrs */
         TCP_MIB_OUTRSTS,                        /* OutRsts */
+        TCP_MIB_CSUMERRORS,                     /* InCsumErrors */
         __TCP_MIB_MAX
 };
 
@@ -147,6 +151,7 @@ enum
         UDP_MIB_OUTDATAGRAMS,                   /* OutDatagrams */
         UDP_MIB_RCVBUFERRORS,                   /* RcvbufErrors */
         UDP_MIB_SNDBUFERRORS,                   /* SndbufErrors */
+        UDP_MIB_CSUMERRORS,                     /* InCsumErrors */
         __UDP_MIB_MAX
 };