diff options
| author | Vadim Fedorenko <vfedorenko@novek.ru> | 2021-09-10 01:04:08 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii.nakryiko@gmail.com> | 2021-09-17 14:03:39 -0700 |
| commit | 03f31a6aed6c483583ec430fedc407a0464093a0 (patch) | |
| tree | a299d5f0c98943a01893d7dc5163bb3d4ee61e78 /include | |
| parent | f8983f7fb04745abe513fd2dad57157497a1221f (diff) | |
| download | libbpf-03f31a6aed6c483583ec430fedc407a0464093a0.tar.gz | |
bpf: Add hardware timestamp field to __sk_buff
BPF programs may want to know hardware timestamps if NIC supports
such timestamping.
Expose this data as hwtstamp field of __sk_buff the same way as
gso_segs/gso_size. This field could be accessed from the same
programs as tstamp field, but it's read-only field. Explicit test
to deny access to padding data is added to bpf_skb_is_valid_access.
Also update BPF_PROG_TEST_RUN tests of the feature.
Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20210909220409.8804-2-vfedorenko@novek.ru
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/bpf.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 791f31d..51cfd91 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -5284,6 +5284,8 @@ struct __sk_buff { __u32 gso_segs; __bpf_md_ptr(struct bpf_sock *, sk); __u32 gso_size; + __u32 :32; /* Padding, future use. */ + __u64 hwtstamp; }; struct bpf_tunnel_key { |