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bpf: Add networking timestamping support to bpf_get/setsockopt()

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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
This commit is contained in:
Jason Xing
2025-02-20 15:29:29 +08:00
committed by Martin KaFai Lau
parent 09bc97bcf8
commit 24e82b7c04
4 changed files with 40 additions and 0 deletions
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3
include/net/sock.h
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@@ -303,6 +303,7 @@ struct sk_filter;
* @sk_stamp: time stamp of last packet received
* @sk_stamp_seq: lock for accessing sk_stamp on 32 bit architectures only
* @sk_tsflags: SO_TIMESTAMPING flags
* @sk_bpf_cb_flags: used in bpf_setsockopt()
* @sk_use_task_frag: allow sk_page_frag() to use current->task_frag.
* Sockets that can be used under memory reclaim should
* set this to false.
@@ -525,6 +526,8 @@ struct sock {
u8 sk_txtime_deadline_mode : 1,
sk_txtime_report_errors : 1,
sk_txtime_unused : 6;
#define SK_BPF_CB_FLAG_TEST(SK, FLAG) ((SK)->sk_bpf_cb_flags & (FLAG))
u8 sk_bpf_cb_flags;
void *sk_user_data;
#ifdef CONFIG_SECURITY