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| author | Dmitry Safonov <0x7f454c46@gmail.com> | 2024-06-07 00:25:58 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-06-12 06:39:04 +0100 |
| commit | 96be3dcd013df6aa79acf32e739c0a35b89a4f50 (patch) | |
| tree | 64d6a3975354f2e7d4efd86736ed2877a01715ec /net/ipv4/tcp_input.c | |
| parent | 811efc06e5f30a57030451b2d1998aa81273baf8 (diff) | |
| download | linux-96be3dcd013df6aa79acf32e739c0a35b89a4f50.tar.gz linux-96be3dcd013df6aa79acf32e739c0a35b89a4f50.tar.bz2 linux-96be3dcd013df6aa79acf32e739c0a35b89a4f50.zip | |
net/tcp: Add tcp-md5 and tcp-ao tracepoints
Instead of forcing userspace to parse dmesg (that's what currently is
happening, at least in codebase of my current company), provide a better
way, that can be enabled/disabled in runtime.
Currently, there are already tcp events, add hashing related ones there,
too. Rasdaemon currently exercises net_dev_xmit_timeout,
devlink_health_report, but it'll be trivial to teach it to deal with
failed hashes. Otherwise, BGP may trace/log them itself. Especially
exciting for possible investigations is key rotation (RNext_key
requests).
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index eb187450e4d7..d0a1e34d69f6 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3578,8 +3578,10 @@ static void tcp_snd_sne_update(struct tcp_sock *tp, u32 ack) ao = rcu_dereference_protected(tp->ao_info, lockdep_sock_is_held((struct sock *)tp)); - if (ao && ack < tp->snd_una) + if (ao && ack < tp->snd_una) { ao->snd_sne++; + trace_tcp_ao_snd_sne_update((struct sock *)tp, ao->snd_sne); + } #endif } @@ -3604,8 +3606,10 @@ static void tcp_rcv_sne_update(struct tcp_sock *tp, u32 seq) ao = rcu_dereference_protected(tp->ao_info, lockdep_sock_is_held((struct sock *)tp)); - if (ao && seq < tp->rcv_nxt) + if (ao && seq < tp->rcv_nxt) { ao->rcv_sne++; + trace_tcp_ao_rcv_sne_update((struct sock *)tp, ao->rcv_sne); + } #endif } |