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| author | Philo Lu <lulie@linux.alibaba.com> | 2024-04-25 19:17:23 +0300 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2024-04-26 00:09:05 +0300 |
| commit | 48e2cd3e3dcfe04f212df4fb189fa04c2a87b980 (patch) | |
| tree | 25a93be2e1812044e50c7cf4909e18c8f5c8ff43 /tools/include/uapi | |
| parent | a311c3f9c342fc12e6c8a27e22c81955ab2a336c (diff) | |
| download | linux-48e2cd3e3dcfe04f212df4fb189fa04c2a87b980.tar.xz | |
bpf: add mrtt and srtt as BPF_SOCK_OPS_RTT_CB args
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>
Diffstat (limited to 'tools/include/uapi')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index e4ae83550fb3..d94a72593ead 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -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 |