tcp: export count for rehash attempts

Using IPv6 flow-label to swiftly route around avoid congested or disconnected network path can greatly improve TCP reliability. This patch adds SNMP counters and a OPT_STATS counter to track both host-level and connection-level statistics. Network administrators can use these counters to evaluate the impact of this new ability better. Export count for rehash attempts to 1) two SNMP counters: TcpTimeoutRehash (rehash due to timeouts), and TcpDuplicateDataRehash (rehash due to receiving duplicate packets) 2) Timestamping API SOF_TIMESTAMPING_OPT_STATS.

Abdul Kabbani committed 6 years ago

Commit 32efcc01 parent 6efca897 files · +18 −1Browse files

Showing the changes to include/uapi/linux (2 of 7 files). Show all

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2 files

include/uapi/linux/snmp.h +2 −0
include/uapi/linux/tcp.h +1 −0

include/uapi/linux/snmp.h+2−0

@@ -285,6 +285,8 @@ enum · 284 unmodified lines
285	LINUX_MIB_TCPRCVQDROP, /* TCPRcvQDrop */	285	LINUX_MIB_TCPRCVQDROP, /* TCPRcvQDrop */
286	LINUX_MIB_TCPWQUEUETOOBIG, /* TCPWqueueTooBig */	286	LINUX_MIB_TCPWQUEUETOOBIG, /* TCPWqueueTooBig */
287	LINUX_MIB_TCPFASTOPENPASSIVEALTKEY, /* TCPFastOpenPassiveAltKey */	287	LINUX_MIB_TCPFASTOPENPASSIVEALTKEY, /* TCPFastOpenPassiveAltKey */
		288	LINUX_MIB_TCPTIMEOUTREHASH, /* TCPTimeoutRehash */
		289	LINUX_MIB_TCPDUPLICATEDATAREHASH, /* TCPDuplicateDataRehash */
288	__LINUX_MIB_MAX	290	__LINUX_MIB_MAX
289	};	291	};
290		292

include/uapi/linux/tcp.h+1−0

@@ -311,6 +311,7 @@ enum { · 310 unmodified lines
311	TCP_NLA_DSACK_DUPS, /* DSACK blocks received */	311	TCP_NLA_DSACK_DUPS, /* DSACK blocks received */
312	TCP_NLA_REORD_SEEN, /* reordering events seen */	312	TCP_NLA_REORD_SEEN, /* reordering events seen */
313	TCP_NLA_SRTT, /* smoothed RTT in usecs */	313	TCP_NLA_SRTT, /* smoothed RTT in usecs */
		314	TCP_NLA_TIMEOUT_REHASH, /* Timeout-triggered rehash attempts */
314	};	315	};
315		316
316	/* for TCP_MD5SIG socket option */	317	/* for TCP_MD5SIG socket option */