diff options
author | Michael Tuexen <tuexen@FreeBSD.org> | 2025-01-06 19:35:11 +0000 |
---|---|---|
committer | Michael Tuexen <tuexen@FreeBSD.org> | 2025-01-06 19:39:40 +0000 |
commit | bb9525f30214e8b6c53c6cccd9e8f02e8f8e8c42 (patch) | |
tree | b4ac9e68108be585ff5490d849e2cdcada0f41bb | |
parent | f415b2ef30f7bf0db753f09fbba7b0910475b0d2 (diff) |
TCP RACK: fix TCP fast open
Do not jump to a place in the code, which requires several variables
to be set (segsize, minseg, idle, len, sb_offset), which is not true.
To avoid using these variables, start the HPTS timer explicitly.
This fix only applies to the client side using TCP fast open.
Approved by: rrs
CID: 1523766
CID: 1523770
CID: 1523786
CID: 1523801
CID: 1523809
MFC after: 1 week
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D48322
-rw-r--r-- | sys/netinet/tcp_stacks/rack.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sys/netinet/tcp_stacks/rack.c b/sys/netinet/tcp_stacks/rack.c index cc0725324760..7baf1a626787 100644 --- a/sys/netinet/tcp_stacks/rack.c +++ b/sys/netinet/tcp_stacks/rack.c @@ -19943,10 +19943,11 @@ rack_output(struct tcpcb *tp) (tp->t_state == TCPS_SYN_SENT)) && SEQ_GT(tp->snd_max, tp->snd_una) && /* initial SYN or SYN|ACK sent */ (tp->t_rxtshift == 0)) { /* not a retransmit */ - cwnd_to_use = rack->r_ctl.cwnd_to_use = tp->snd_cwnd; - so = inp->inp_socket; - sb = &so->so_snd; - goto just_return_nolock; + rack_start_hpts_timer(rack, tp, cts, 0, 0, 0); +#ifdef TCP_ACCOUNTING + sched_unpin(); +#endif + return (0); } /* * Determine length of data that should be transmitted, and flags |