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| author | Alan Maguire <alan.maguire@oracle.com> | 2022-07-12 15:31:45 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-07-13 01:27:19 +0300 |
| commit | a9d2fae89fa8eb638203d8a4da435c647c12dfa3 (patch) | |
| tree | 79fc7639a8674e20b98c011f5205979189544eb3 /tools/testing/selftests/bpf/progs/bpf_iter.h | |
| parent | 647cafa22349026a8435030e9157074ab7fe5710 (diff) | |
| download | linux-a9d2fae89fa8eb638203d8a4da435c647c12dfa3.tar.xz | |
selftests/bpf: add a ksym iter subtest
add subtest verifying BPF ksym iter behaviour. The BPF ksym
iter program shows an example of dumping a format different to
/proc/kallsyms. It adds KIND and MAX_SIZE fields which represent the
kind of symbol (core kernel, module, ftrace, bpf, or kprobe) and
the maximum size the symbol can be. The latter is calculated from
the difference between current symbol value and the next symbol
value.
The key benefit for this iterator will likely be supporting in-kernel
data-gathering rather than dumping symbol details to userspace and
parsing the results.
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/1657629105-7812-3-git-send-email-alan.maguire@oracle.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/bpf_iter.h')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/bpf_iter.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter.h b/tools/testing/selftests/bpf/progs/bpf_iter.h index 97ec8bc76ae6..e9846606690d 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter.h +++ b/tools/testing/selftests/bpf/progs/bpf_iter.h @@ -22,6 +22,7 @@ #define BTF_F_NONAME BTF_F_NONAME___not_used #define BTF_F_PTR_RAW BTF_F_PTR_RAW___not_used #define BTF_F_ZERO BTF_F_ZERO___not_used +#define bpf_iter__ksym bpf_iter__ksym___not_used #include "vmlinux.h" #undef bpf_iter_meta #undef bpf_iter__bpf_map @@ -44,6 +45,7 @@ #undef BTF_F_NONAME #undef BTF_F_PTR_RAW #undef BTF_F_ZERO +#undef bpf_iter__ksym struct bpf_iter_meta { struct seq_file *seq; @@ -151,3 +153,8 @@ enum { BTF_F_PTR_RAW = (1ULL << 2), BTF_F_ZERO = (1ULL << 3), }; + +struct bpf_iter__ksym { + struct bpf_iter_meta *meta; + struct kallsym_iter *ksym; +}; |