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bpf: Prepare the sock_ops ctx and call bpf prog for TX timestamping

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This patch introduces a new bpf_skops_tx_timestamping() function
that prepares the "struct bpf_sock_ops" ctx and then executes the
sockops BPF program.

The subsequent patch will utilize bpf_skops_tx_timestamping() at
the existing TX timestamping kernel callbacks (__sk_tstamp_tx
specifically) to call the sockops BPF program. Later, four callback
points to report information to user space based on this patch will
be introduced.

Signed-off-by: Jason Xing <kerneljasonxing@gmail.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20250220072940.99994-3-kerneljasonxing@gmail.com
This commit is contained in:
Jason Xing
2025-02-20 15:29:30 +08:00
committed by Martin KaFai Lau
parent 24e82b7c04
commit df600f3b1d
2 changed files with 21 additions and 0 deletions
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7
include/net/sock.h
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@@ -2924,6 +2924,13 @@ int sock_set_timestamping(struct sock *sk, int optname,
struct so_timestamping timestamping);
void sock_enable_timestamps(struct sock *sk);
#if defined(CONFIG_CGROUP_BPF)
void bpf_skops_tx_timestamping(struct sock *sk, struct sk_buff *skb, int op);
#else
static inline void bpf_skops_tx_timestamping(struct sock *sk, struct sk_buff *skb, int op)
{
}
#endif
void sock_no_linger(struct sock *sk);
void sock_set_keepalive(struct sock *sk);
void sock_set_priority(struct sock *sk, u32 priority);