diff options
| author | Jason Xing <kerneljasonxing@gmail.com> | 2025-03-12 16:35:20 +0100 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2025-03-13 14:30:38 -0700 |
| commit | 49f6713cb6913e1e62d98a36548c592b3d5d32df (patch) | |
| tree | a1bb114b9a2df9e0a4b794ec54100ac10b86130a | |
| parent | 6d99faf2541d519ec30a104d6b585484563e2c45 (diff) | |
tcp: bpf: Introduce bpf_sol_tcp_getsockopt to support TCP_BPF flags
The patch refactors a bit on supporting getsockopt for TCP BPF flags.
For now, only TCP_BPF_SOCK_OPS_CB_FLAGS. Later, more flags will be added
into this function.
No functional changes here.
Signed-off-by: Jason Xing <kerneljasonxing@gmail.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20250312153523.9860-2-kerneljasonxing@gmail.com
| -rw-r--r-- | net/core/filter.c | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index a0867c5b32b3..2932de5cc57c 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5282,6 +5282,26 @@ 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; + } + default: + return -EINVAL; + } + + return 0; +} + static int bpf_sol_tcp_setsockopt(struct sock *sk, int optname, char *optval, int optlen) { @@ -5415,20 +5435,9 @@ 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); } |