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bpf: add a test case for helper bpf_perf_prog_read_value

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The bpf sample program trace_event is enhanced to use the new
helper to print out enabled/running time.

Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Alexei Starovoitov <ast@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yonghong Song 2017-10-05 09:19:23 -07:00 • committed by David S. Miller
parent 4bebdc7a85
commit 81b9cf8028
4 changed files with 23 additions and 6 deletions
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3
tools/include/uapi/linux/bpf.h
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@ -698,7 +698,8 @@ union bpf_attr {
FN(sk_redirect_map), \
FN(sock_map_update), \
FN(xdp_adjust_meta), \
FN(perf_event_read_value),
FN(perf_event_read_value), \
FN(perf_prog_read_value),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call