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tcp: add some RTO MIN and DELACK MAX {bpf_}set/getsockopt supports #8666

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tcp: add some RTO MIN and DELACK MAX {bpf_}set/getsockopt supports #8666

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e370335
tcp: bpf: introduce bpf_sol_tcp_getsockopt to support TCP_BPF flags
JasonXing Mar 12, 2025
2697294
tcp: bpf: support bpf_getsockopt for TCP_BPF_RTO_MIN
JasonXing Mar 12, 2025
cab8a25
tcp: bpf: support bpf_getsockopt for TCP_BPF_DELACK_MAX
JasonXing Mar 12, 2025
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45 changes: 33 additions & 12 deletions net/core/filter.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5259,6 +5259,38 @@ static int sol_socket_sockopt(struct sock *sk, int optname,
KERNEL_SOCKPTR(optval), *optlen);
}

static int bpf_sol_tcp_getsockopt(struct sock *sk, int optname,
char *optval, int optlen)
{
if (optlen != sizeof(int))
return -EINVAL;

switch (optname) {
case TCP_BPF_SOCK_OPS_CB_FLAGS: {
int cb_flags = tcp_sk(sk)->bpf_sock_ops_cb_flags;

memcpy(optval, &cb_flags, optlen);
break;
}
case TCP_BPF_RTO_MIN: {
int rto_min_us = jiffies_to_usecs(inet_csk(sk)->icsk_rto_min);

memcpy(optval, &rto_min_us, optlen);
break;
}
case TCP_BPF_DELACK_MAX: {
int delack_max_us = jiffies_to_usecs(inet_csk(sk)->icsk_delack_max);

memcpy(optval, &delack_max_us, optlen);
break;
}
default:
return -EINVAL;
}

return 0;
}

static int bpf_sol_tcp_setsockopt(struct sock *sk, int optname,
char *optval, int optlen)
{
Expand Down Expand Up @@ -5391,20 +5423,9 @@ static int sol_tcp_sockopt(struct sock *sk, int optname,
if (*optlen < 1)
return -EINVAL;
break;
case TCP_BPF_SOCK_OPS_CB_FLAGS:
if (*optlen != sizeof(int))
return -EINVAL;
if (getopt) {
struct tcp_sock *tp = tcp_sk(sk);
int cb_flags = tp->bpf_sock_ops_cb_flags;

memcpy(optval, &cb_flags, *optlen);
return 0;
}
return bpf_sol_tcp_setsockopt(sk, optname, optval, *optlen);
default:
if (getopt)
return -EINVAL;
return bpf_sol_tcp_getsockopt(sk, optname, optval, *optlen);
return bpf_sol_tcp_setsockopt(sk, optname, optval, *optlen);
}

Expand Down
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