raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-20 08:42:06 +00:00
Code Issues Projects Releases Wiki Activity

bpf: Add BPF_SOCK_OPS_TSTAMP_ACK_CB callback

Browse Source 
Support the ACK case for bpf timestamping.

Add a new sock_ops callback, BPF_SOCK_OPS_TSTAMP_ACK_CB. This
callback will occur at the same timestamping point as the user
space's SCM_TSTAMP_ACK. The BPF program can use it to get the
same SCM_TSTAMP_ACK timestamp without modifying the user-space
application.

This patch extends txstamp_ack to two bits: 1 stands for
SO_TIMESTAMPING mode, 2 bpf extension.

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/20250220072940.99994-10-kerneljasonxing@gmail.com
This commit is contained in:
Jason Xing
2025-02-20 15:29:37 +08:00
committed by Martin KaFai Lau
parent 2deaf7f42b
commit b3b81e6b00
5 changed files with 19 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
tools/include/uapi/linux/bpf.h
View File

@@ -7044,6 +7044,11 @@ enum {
* SK_BPF_CB_TX_TIMESTAMPING feature
* is on.
*/
BPF_SOCK_OPS_TSTAMP_ACK_CB, /* Called when all the skbs in the
* same sendmsg call are acked
* when SK_BPF_CB_TX_TIMESTAMPING
* feature is on.
*/
};
/* List of TCP states. There is a build check in net/ipv4/tcp.c to detect