diff options
| author | Nikita V. Shirokov <tehnerd@tehnerd.com> | 2018-04-17 21:42:22 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-04-18 23:34:17 +0200 |
| commit | 0367d0a29427d5916b98cf31dfc85a8293540614 (patch) | |
| tree | 1fb815b56707d8a4affc19d5741fb699bbce5aa7 /tools/include | |
| parent | 587b80cce95b8aab89e5e35033953c005dc47f01 (diff) | |
bpf: adding tests for bpf_xdp_adjust_tail
adding selftests for bpf_xdp_adjust_tail helper. in this synthetic test
we are testing that 1) if data_end < data helper will return EINVAL
2) for normal use case packet's length would be reduced.
Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 9d07465023a2..56bf493ba7ed 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -755,6 +755,13 @@ union bpf_attr { * @addr: pointer to struct sockaddr to bind socket to * @addr_len: length of sockaddr structure * Return: 0 on success or negative error code + * + * int bpf_xdp_adjust_tail(xdp_md, delta) + * Adjust the xdp_md.data_end by delta. Only shrinking of packet's + * size is supported. + * @xdp_md: pointer to xdp_md + * @delta: A negative integer to be added to xdp_md.data_end + * Return: 0 on success or negative on error */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -821,7 +828,8 @@ union bpf_attr { FN(msg_apply_bytes), \ FN(msg_cork_bytes), \ FN(msg_pull_data), \ - FN(bind), + FN(bind), \ + FN(xdp_adjust_tail), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call |