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bpf: add mrtt and srtt as BPF_SOCK_OPS_RTT_CB args

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Two important arguments in RTT estimation, mrtt and srtt, are passed to
tcp_bpf_rtt(), so that bpf programs get more information about RTT
computation in BPF_SOCK_OPS_RTT_CB.

The difference between bpf_sock_ops->srtt_us and the srtt here is: the
former is an old rtt before update, while srtt passed by tcp_bpf_rtt()
is that after update.

Signed-off-by: Philo Lu <lulie@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240425161724.73707-2-lulie@linux.alibaba.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Philo Lu
2024-04-26 00:17:23 +08:00
committed by Martin KaFai Lau
parent a311c3f9c3
commit 48e2cd3e3d
4 changed files with 8 additions and 4 deletions
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2
include/uapi/linux/bpf.h
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@@ -6947,6 +6947,8 @@ enum {
* socket transition to LISTEN state.
*/
BPF_SOCK_OPS_RTT_CB, /* Called on every RTT.
* Arg1: measured RTT input (mrtt)
* Arg2: updated srtt
*/
BPF_SOCK_OPS_PARSE_HDR_OPT_CB, /* Parse the header option.
* It will be called to handle