diff options
| author | Jason Xing <kerneljasonxing@gmail.com> | 2025-02-20 15:29:34 +0800 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2025-02-20 14:29:24 -0800 |
| commit | 6b98ec7e882af1c3088a88757e2226d06c8514f9 (patch) | |
| tree | bc8788a4e1a836f3ea694d5405b0e10eebe10b77 /include | |
| parent | aa290f93a4af662b8d2d9e9df65798f9f24cecf3 (diff) | |
bpf: Add BPF_SOCK_OPS_TSTAMP_SCHED_CB callback
Support SCM_TSTAMP_SCHED case for bpf timestamping.
Add a new sock_ops callback, BPF_SOCK_OPS_TSTAMP_SCHED_CB. This
callback will occur at the same timestamping point as the user
space's SCM_TSTAMP_SCHED. The BPF program can use it to get the
same SCM_TSTAMP_SCHED timestamp without modifying the user-space
application.
A new SKBTX_BPF flag is added to mark skb_shinfo(skb)->tx_flags,
ensuring that the new BPF timestamping and the current user
space's SO_TIMESTAMPING do not interfere with each other.
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/20250220072940.99994-7-kerneljasonxing@gmail.com
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/skbuff.h | 6 | ||||
| -rw-r--r-- | include/uapi/linux/bpf.h | 5 |
2 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index bb2b751d274a..52f6e033e704 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -489,10 +489,14 @@ enum { /* generate software time stamp when entering packet scheduling */ SKBTX_SCHED_TSTAMP = 1 << 6, + + /* used for bpf extension when a bpf program is loaded */ + SKBTX_BPF = 1 << 7, }; #define SKBTX_ANY_SW_TSTAMP (SKBTX_SW_TSTAMP | \ - SKBTX_SCHED_TSTAMP) + SKBTX_SCHED_TSTAMP | \ + SKBTX_BPF) #define SKBTX_ANY_TSTAMP (SKBTX_HW_TSTAMP | \ SKBTX_HW_TSTAMP_USE_CYCLES | \ SKBTX_ANY_SW_TSTAMP) diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 4e0632848440..bb62fe25b2d0 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -7031,6 +7031,11 @@ enum { * by the kernel or the * earlier bpf-progs. */ + BPF_SOCK_OPS_TSTAMP_SCHED_CB, /* Called when skb is passing + * through dev layer 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 |