diff options
| author | Martin KaFai Lau <kafai@fb.com> | 2020-08-20 12:00:27 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-08-24 14:35:00 -0700 |
| commit | ca584ba070864c606f3a54faaafe774726d5b4a1 (patch) | |
| tree | b3288fe9d41eb22da482f526b897e561afab3bdc /net/core | |
| parent | 2b8ee4f05d4f6a6c427ad30dd6c1bb49eb2efd3b (diff) | |
tcp: bpf: Add TCP_BPF_RTO_MIN for bpf_setsockopt
This patch adds bpf_setsockopt(TCP_BPF_RTO_MIN) to allow bpf prog
to set the min rto of a connection. It could be used together
with the earlier patch which has added bpf_setsockopt(TCP_BPF_DELACK_MAX).
A later selftest patch will communicate the max delay ack in a
bpf tcp header option and then the receiving side can use
bpf_setsockopt(TCP_BPF_RTO_MIN) to set a shorter rto.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200820190027.2884170-1-kafai@fb.com
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/filter.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 80fe7420f609..075ab71b985c 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4488,6 +4488,13 @@ static int _bpf_setsockopt(struct sock *sk, int level, int optname, return -EINVAL; inet_csk(sk)->icsk_delack_max = timeout; break; + case TCP_BPF_RTO_MIN: + timeout = usecs_to_jiffies(val); + if (timeout > TCP_RTO_MIN || + timeout < TCP_TIMEOUT_MIN) + return -EINVAL; + inet_csk(sk)->icsk_rto_min = timeout; + break; case TCP_SAVE_SYN: if (val < 0 || val > 1) ret = -EINVAL; |