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| author |   Song Liu <songliubraving@fb.com> | 2019-03-11 22:30:38 -0700 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-03-19 16:52:06 -0300 |
| commit | 34be16466d4dc06f3d604dafbcdb3327b72e78da (patch) | |
| tree | ac000724283e4cf8052a9604b71c8f6885d53c2e /tools/lib/bpf/libbpf.map | |
| parent | perf record: Replace option --bpf-event with --no-bpf-event (diff) | |
| download | linux-dev-34be16466d4dc06f3d604dafbcdb3327b72e78da.tar.xz linux-dev-34be16466d4dc06f3d604dafbcdb3327b72e78da.zip | |
tools lib bpf: Introduce bpf_program__get_prog_info_linear()
Currently, bpf_prog_info includes 9 arrays. The user has the option to
fetch any combination of these arrays. However, this requires a lot of
handling.
This work becomes more tricky when we need to store bpf_prog_info to a
file, because these arrays are allocated independently.
This patch introduces 'struct bpf_prog_info_linear', which stores arrays
of bpf_prog_info in continuous memory.
Helper functions are introduced to unify the work to get different sets
of bpf_prog_info. Specifically, bpf_program__get_prog_info_linear()
allows the user to select which arrays to fetch, and handles details for
the user.
Please see the comments right before 'enum bpf_prog_info_array' for more
details and examples.
Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lkml.kernel.org/r/ce92c091-e80d-a0c1-4aa0-987706c42b20@iogearbox.net
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: kernel-team@fb.com
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190312053051.2690567-3-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 778a26702a70..f3ce50500cf2 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -153,4 +153,7 @@ LIBBPF_0.0.2 { xsk_socket__delete; xsk_umem__fd; xsk_socket__fd; + bpf_program__get_prog_info_linear; + bpf_program__bpil_addr_to_offs; + bpf_program__bpil_offs_to_addr; } LIBBPF_0.0.1; |