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authorAbdul Kabbani <akabbani@google.com>2020-01-24 16:34:02 -0500
committerDavid S. Miller <davem@davemloft.net>2020-01-26 15:28:47 +0100
commit32efcc06d2a15fa87585614d12d6c2308cc2d3f3 (patch)
tree7f4749c42a0737777290daab96d93d5d09c6457e /include
parent6efca894e92295174a95b0b9a0c59012a1bb2d20 (diff)
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.h2
-rw-r--r--include/uapi/linux/snmp.h2
-rw-r--r--include/uapi/linux/tcp.h1
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 */