diff options
| author | Abdul Kabbani <akabbani@google.com> | 2020-01-24 16:34:02 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-01-26 15:28:47 +0100 |
| commit | 32efcc06d2a15fa87585614d12d6c2308cc2d3f3 (patch) | |
| tree | 7f4749c42a0737777290daab96d93d5d09c6457e /include | |
| parent | 6efca894e92295174a95b0b9a0c59012a1bb2d20 (diff) | |
| download | lwn-32efcc06d2a15fa87585614d12d6c2308cc2d3f3.tar.gz lwn-32efcc06d2a15fa87585614d12d6c2308cc2d3f3.zip | |
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.
Signed-off-by: Abdul Kabbani <akabbani@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Kevin(Yudong) Yang <yyd@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tcp.h | 2 | ||||
| -rw-r--r-- | include/uapi/linux/snmp.h | 2 | ||||
| -rw-r--r-- | include/uapi/linux/tcp.h | 1 |
3 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 4e2124607d32..1cf73e6f85ca 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -386,6 +386,8 @@ struct tcp_sock { #define BPF_SOCK_OPS_TEST_FLAG(TP, ARG) 0 #endif + u16 timeout_rehash; /* Timeout-triggered rehash attempts */ + u32 rcv_ooopack; /* Received out-of-order packets, for tcpinfo */ /* Receiver side RTT estimation */ diff --git a/include/uapi/linux/snmp.h b/include/uapi/linux/snmp.h index 7eee233e78d2..7d91f4debc48 100644 --- a/include/uapi/linux/snmp.h +++ b/include/uapi/linux/snmp.h @@ -285,6 +285,8 @@ enum LINUX_MIB_TCPRCVQDROP, /* TCPRcvQDrop */ LINUX_MIB_TCPWQUEUETOOBIG, /* TCPWqueueTooBig */ LINUX_MIB_TCPFASTOPENPASSIVEALTKEY, /* TCPFastOpenPassiveAltKey */ + LINUX_MIB_TCPTIMEOUTREHASH, /* TCPTimeoutRehash */ + LINUX_MIB_TCPDUPLICATEDATAREHASH, /* TCPDuplicateDataRehash */ __LINUX_MIB_MAX }; diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index d87184e673ca..fd9eb8f6bcae 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -311,6 +311,7 @@ enum { TCP_NLA_DSACK_DUPS, /* DSACK blocks received */ TCP_NLA_REORD_SEEN, /* reordering events seen */ TCP_NLA_SRTT, /* smoothed RTT in usecs */ + TCP_NLA_TIMEOUT_REHASH, /* Timeout-triggered rehash attempts */ }; /* for TCP_MD5SIG socket option */ |