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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