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| author |   Jason Xing <kerneljasonxing@gmail.com> | 2025-02-20 15:29:29 +0800 |
|---|---|---|
| committer |   Martin KaFai Lau <martin.lau@kernel.org> | 2025-02-20 14:28:37 -0800 |
| commit | 24e82b7c045ba5afde5bd81f691b7a72283de35e (patch) | |
| tree | 2dc9728e29a19a4c7cdb2e59b87f7ce4729c30de /net | |
| parent | Merge branch 'bpf-support-setting-max-rto-for-bpf_setsockopt' (diff) | |
| download | wireguard-linux-24e82b7c045ba5afde5bd81f691b7a72283de35e.tar.xz wireguard-linux-24e82b7c045ba5afde5bd81f691b7a72283de35e.zip | |
bpf: Add networking timestamping support to bpf_get/setsockopt()
The new SK_BPF_CB_FLAGS and new SK_BPF_CB_TX_TIMESTAMPING are
added to bpf_get/setsockopt. The later patches will implement the
BPF networking timestamping. The BPF program will use
bpf_setsockopt(SK_BPF_CB_FLAGS, SK_BPF_CB_TX_TIMESTAMPING) to
enable the BPF networking timestamping on a socket.
Signed-off-by: Jason Xing <kerneljasonxing@gmail.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250220072940.99994-2-kerneljasonxing@gmail.com
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/filter.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index ffec7b4357f9..5b7e44dfc037 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5222,6 +5222,25 @@ static const struct bpf_func_proto bpf_get_socket_uid_proto = { .arg1_type = ARG_PTR_TO_CTX, }; +static int sk_bpf_set_get_cb_flags(struct sock *sk, char *optval, bool getopt) +{ + u32 sk_bpf_cb_flags; + + if (getopt) { + *(u32 *)optval = sk->sk_bpf_cb_flags; + return 0; + } + + sk_bpf_cb_flags = *(u32 *)optval; + + if (sk_bpf_cb_flags & ~SK_BPF_CB_MASK) + return -EINVAL; + + sk->sk_bpf_cb_flags = sk_bpf_cb_flags; + + return 0; +} + static int sol_socket_sockopt(struct sock *sk, int optname, char *optval, int *optlen, bool getopt) @@ -5238,6 +5257,7 @@ static int sol_socket_sockopt(struct sock *sk, int optname, case SO_MAX_PACING_RATE: case SO_BINDTOIFINDEX: case SO_TXREHASH: + case SK_BPF_CB_FLAGS: if (*optlen != sizeof(int)) return -EINVAL; break; @@ -5247,6 +5267,9 @@ static int sol_socket_sockopt(struct sock *sk, int optname, return -EINVAL; } + if (optname == SK_BPF_CB_FLAGS) + return sk_bpf_set_get_cb_flags(sk, optval, getopt); + if (getopt) { if (optname == SO_BINDTODEVICE) return -EINVAL; |