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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 Andrii Nakryiko
parent b1cb441916
commit 43b6c2cd70
1 changed files with 7 additions and 0 deletions
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7
include/uapi/linux/bpf.h
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@@ -6920,6 +6920,12 @@ enum {
BPF_SOCK_OPS_ALL_CB_FLAGS = 0x7F,
};
enum {
SK_BPF_CB_TX_TIMESTAMPING = 1<<0,
SK_BPF_CB_MASK = (SK_BPF_CB_TX_TIMESTAMPING - 1) |
SK_BPF_CB_TX_TIMESTAMPING
};
/* List of known BPF sock_ops operators.
* New entries can only be added at the end
*/
@@ -7098,6 +7104,7 @@ enum {
TCP_BPF_SYN_IP = 1006, /* Copy the IP[46] and TCP header */
TCP_BPF_SYN_MAC = 1007, /* Copy the MAC, IP[46], and TCP header */
TCP_BPF_SOCK_OPS_CB_FLAGS = 1008, /* Get or Set TCP sock ops flags */
SK_BPF_CB_FLAGS = 1009, /* Get or set sock ops flags in socket */
};
enum {