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author | Alexei Starovoitov <ast@kernel.org> | 2020-08-18 21:27:57 -0700 |
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committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-08-20 16:02:36 +0200 |
commit | f0fdfefb2d4da5b76c3f810be0edb2ab90360224 (patch) | |
tree | 453bb56dfa2c9e377bf1086ddf76670f5a4a56e2 /kernel/bpf/Makefile | |
parent | 005142b8a1f0f32d33fbe04b728464c1b7acfa0e (diff) | |
download | linux-f0fdfefb2d4da5b76c3f810be0edb2ab90360224.tar.bz2 |
bpf: Add BPF program and map iterators as built-in BPF programs.
The program and map iterators work similar to seq_file-s.
Once the program is pinned in bpffs it can be read with "cat" tool
to print human readable output. In this case about BPF programs and maps.
For example:
$ cat /sys/fs/bpf/progs.debug
id name attached
5 dump_bpf_map bpf_iter_bpf_map
6 dump_bpf_prog bpf_iter_bpf_prog
$ cat /sys/fs/bpf/maps.debug
id name max_entries
3 iterator.rodata 1
To avoid kernel build dependency on clang 10 separate bpf skeleton generation
into manual "make" step and instead check-in generated .skel.h into git.
Unlike 'bpftool prog show' in-kernel BTF name is used (when available)
to print full name of BPF program instead of 16-byte truncated name.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200819042759.51280-3-alexei.starovoitov@gmail.com
Diffstat (limited to 'kernel/bpf/Makefile')
0 files changed, 0 insertions, 0 deletions