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author | 2020-03-21 19:04:24 +0900 | |
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committer | 2020-03-23 22:27:57 +0100 | |
commit | aa5e2af660fc6e35b9518d68dd7e1bb736e9f7e7 (patch) | |
tree | f99d5a219ca3d9f2026770dae2c1a7930eba071e /Documentation/pi-futex.txt | |
parent | samples, bpf: Move read_trace_pipe to trace_helpers (diff) | |
download | linux-aa5e2af660fc6e35b9518d68dd7e1bb736e9f7e7.tar.gz linux-aa5e2af660fc6e35b9518d68dd7e1bb736e9f7e7.tar.bz2 linux-aa5e2af660fc6e35b9518d68dd7e1bb736e9f7e7.zip |
samples, bpf: Refactor perf_event user program with libbpf bpf_link
The bpf_program__attach of libbpf(using bpf_link) is much more intuitive
than the previous method using ioctl.
bpf_program__attach_perf_event manages the enable of perf_event and
attach of BPF programs to it, so there's no neeed to do this
directly with ioctl.
In addition, bpf_link provides consistency in the use of API because it
allows disable (detach, destroy) for multiple events to be treated as
one bpf_link__destroy. Also, bpf_link__destroy manages the close() of
perf_event fd.
This commit refactors samples that attach the bpf program to perf_event
by using libbbpf instead of ioctl. Also the bpf_load in the samples were
removed and migrated to use libbbpf API.
Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200321100424.1593964-3-danieltimlee@gmail.com
Diffstat (limited to 'Documentation/pi-futex.txt')
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