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mptcp: add MIB counter for invalid mapping

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Account this exceptional events for better introspection.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2021-06-21 15:54:37 -07:00 committed by David S. Miller
parent 8cfc47fc2e
commit 06285da96a
3 changed files with 5 additions and 1 deletions
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1
net/mptcp/mib.c
View file

@ -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("DSSNoMatchTCP", MPTCP_MIB_DSSTCPMISMATCH),
SNMP_MIB_ITEM("DataCsumErr", MPTCP_MIB_DATACSUMERR),
SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL),
SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE),

1
net/mptcp/mib.h
View file

@ -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_DSSTCPMISMATCH, /* DSS-mapping did not map with TCP's sequence numbers */
MPTCP_MIB_DATACSUMERR, /* The data checksum fail */
MPTCP_MIB_OFOQUEUETAIL, /* Segments inserted into OoO queue tail */
MPTCP_MIB_OFOQUEUE, /* Segments inserted into OoO queue */

4
net/mptcp/subflow.c
View file

@ -1046,8 +1046,10 @@ static enum mapping_status get_mapping_status(struct sock *ssk,
/* we revalidate valid mapping on new skb, because we must ensure
* the current skb is completely covered by the available mapping
*/
if (!validate_mapping(ssk, skb))
if (!validate_mapping(ssk, skb)) {
MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_DSSTCPMISMATCH);
return MAPPING_INVALID;
}
skb_ext_del(skb, SKB_EXT_MPTCP);