diff options
| author | Akhmat Karakotov <hmukos@yandex-team.ru> | 2022-01-28 22:26:21 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-02-02 14:45:18 +0000 |
| commit | 5903123f662ed18483f05cac3f9e800a074c29ff (patch) | |
| tree | 33c2c972f30b2175af4a445c1c8462a9c78bd99e /net/ipv4/tcp_input.c | |
| parent | 0b6b0d3113eba39d679cd799dafacf3af5500544 (diff) | |
| download | linux-5903123f662ed18483f05cac3f9e800a074c29ff.tar.gz | |
tcp: Use BPF timeout setting for SYN ACK RTO
When setting RTO through BPF program, some SYN ACK packets were unaffected
and continued to use TCP_TIMEOUT_INIT constant. This patch adds timeout
option to struct request_sock. Option is initialized with TCP_TIMEOUT_INIT
and is reassigned through BPF using tcp_timeout_init call. SYN ACK
retransmits now use newly added timeout option.
Signed-off-by: Akhmat Karakotov <hmukos@yandex-team.ru>
Acked-by: Martin KaFai Lau <kafai@fb.com>
v2:
- Add timeout option to struct request_sock. Do not call
tcp_timeout_init on every syn ack retransmit.
v3:
- Use unsigned long for min. Bound tcp_timeout_init to TCP_RTO_MAX.
v4:
- Refactor duplicate code by adding reqsk_timeout function.
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, 5 insertions, 3 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index dc49a3d551eb9..302744bec59e1 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -6723,6 +6723,7 @@ struct request_sock *inet_reqsk_alloc(const struct request_sock_ops *ops, ireq->ireq_state = TCP_NEW_SYN_RECV; write_pnet(&ireq->ireq_net, sock_net(sk_listener)); ireq->ireq_family = sk_listener->sk_family; + req->timeout = TCP_TIMEOUT_INIT; } return req; @@ -6939,9 +6940,10 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops, sock_put(fastopen_sk); } else { tcp_rsk(req)->tfo_listener = false; - if (!want_cookie) - inet_csk_reqsk_queue_hash_add(sk, req, - tcp_timeout_init((struct sock *)req)); + if (!want_cookie) { + req->timeout = tcp_timeout_init((struct sock *)req); + inet_csk_reqsk_queue_hash_add(sk, req, req->timeout); + } af_ops->send_synack(sk, dst, &fl, req, &foc, !want_cookie ? TCP_SYNACK_NORMAL : TCP_SYNACK_COOKIE, |