diff options
| author |   Mubashir Adnan Qureshi <mubashirq@google.com> | 2022-10-26 13:51:15 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-10-28 10:47:42 +0100 |
| commit | 71fc704768f601ed3fa36310822a5e03f310f781 (patch) | |
| tree | a6b1ae601b9d5ef8bfd0a520407754330b43c903 | |
| parent | tcp: add u32 counter in tcp_sock and an SNMP counter for PLB (diff) | |
| download | wireguard-linux-71fc704768f601ed3fa36310822a5e03f310f781.tar.xz wireguard-linux-71fc704768f601ed3fa36310822a5e03f310f781.zip | |
tcp: add rcv_wnd and plb_rehash to TCP_INFO
rcv_wnd can be useful to diagnose TCP performance where receiver window
becomes the bottleneck. rehash reports the PLB and timeout triggered
rehash attempts by the TCP connection.
Signed-off-by: Mubashir Adnan Qureshi <mubashirq@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/uapi/linux/tcp.h | 5 | ||||
| -rw-r--r-- | net/ipv4/tcp.c | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index c9abe86eda5f..879eeb0a084b 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -284,6 +284,11 @@ struct tcp_info { __u32 tcpi_snd_wnd; /* peer's advertised receive window after * scaling (bytes) */ + __u32 tcpi_rcv_wnd; /* local advertised receive window after + * scaling (bytes) + */ + + __u32 tcpi_rehash; /* PLB or timeout triggered rehash attempts */ }; /* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */ diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 1da7c53b6cb5..de8f0cd7cb32 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -3940,6 +3940,8 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info) info->tcpi_reord_seen = tp->reord_seen; info->tcpi_rcv_ooopack = tp->rcv_ooopack; info->tcpi_snd_wnd = tp->snd_wnd; + info->tcpi_rcv_wnd = tp->rcv_wnd; + info->tcpi_rehash = tp->plb_rehash + tp->timeout_rehash; info->tcpi_fastopen_client_fail = tp->fastopen_client_fail; unlock_sock_fast(sk, slow); } |