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[v3,mptcp-next,18/21] mptcp: add the mib for data checksum

Message ID 0ea2fdf868c525c568d39146cf2c00ecdcb46fb9.1619035356.git.pabeni@redhat.com
State Superseded, archived
Delegated to: Paolo Abeni
Headers show
Series mptcp: data checksum support | expand

Commit Message

Paolo Abeni April 21, 2021, 8:18 p.m. UTC 
From: Geliang Tang <geliangtang@gmail.com>

This patch added the mib for the data checksum, MPTCP_MIB_DSSCSUMERR.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
---
 net/mptcp/mib.c     | 1 +
 net/mptcp/mib.h     | 1 +
 net/mptcp/subflow.c | 4 +++-
 3 files changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/net/mptcp/mib.c b/net/mptcp/mib.c
index eb2dc6dbe212..c7042e3317b5 100644
--- a/net/mptcp/mib.c
+++ b/net/mptcp/mib.c
@@ -25,6 +25,7 @@  static const struct snmp_mib mptcp_snmp_list[] = {
 	SNMP_MIB_ITEM("MPJoinAckHMacFailure", MPTCP_MIB_JOINACKMAC),
 	SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
 	SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
+	SNMP_MIB_ITEM("DSSCsumErr", MPTCP_MIB_DSSCSUMERR),
 	SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL),
 	SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE),
 	SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE),
diff --git a/net/mptcp/mib.h b/net/mptcp/mib.h
index f0da4f060fe1..c407358eced8 100644
--- a/net/mptcp/mib.h
+++ b/net/mptcp/mib.h
@@ -18,6 +18,7 @@  enum linux_mptcp_mib_field {
 	MPTCP_MIB_JOINACKMAC,		/* HMAC was wrong on ACK + MP_JOIN */
 	MPTCP_MIB_DSSNOMATCH,		/* Received a new mapping that did not match the previous one */
 	MPTCP_MIB_INFINITEMAPRX,	/* Received an infinite mapping */
+	MPTCP_MIB_DSSCSUMERR,		/* The DSS checksum fail */
 	MPTCP_MIB_OFOQUEUETAIL,	/* Segments inserted into OoO queue tail */
 	MPTCP_MIB_OFOQUEUE,		/* Segments inserted into OoO queue */
 	MPTCP_MIB_OFOMERGE,		/* Segments merged in OoO queue */
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 6a3c161ebe34..fa777bf344b0 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -893,8 +893,10 @@  static enum mapping_status validate_data_csum(struct sock *ssk, struct sk_buff *
 	header.csum = 0;
 
 	csum = csum_partial(&header, sizeof(header), subflow->map_data_csum);
-	if (unlikely(csum_fold(csum)))
+	if (unlikely(csum_fold(csum))) {
+		MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_DSSCSUMERR);
 		return subflow->mp_join ? MAPPING_INVALID : MAPPING_DUMMY;
+	}
 
 	return MAPPING_OK;
 }