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libbpf: Expose bpf_find_kernel_btf as a LIBBPF_API

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This patch exposes bpf_find_kernel_btf() as a LIBBPF_API.
It will be used in 'bpftool map dump' in a following patch
to dump a map with btf_vmlinux_value_type_id set.

bpf_find_kernel_btf() is renamed to libbpf_find_kernel_btf()
and moved to btf.c.  As <linux/kernel.h> is included,
some of the max/min type casting needs to be fixed.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200115230031.1102305-1-kafai@fb.com
This commit is contained in:
Martin KaFai Lau
2020-01-15 15:00:31 -08:00
committed by Alexei Starovoitov
parent 188a486619
commit fb2426ad00
4 changed files with 102 additions and 96 deletions
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1
tools/lib/bpf/libbpf.map
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@@ -231,4 +231,5 @@ LIBBPF_0.0.7 {
bpf_program__is_struct_ops;
bpf_program__set_struct_ops;
btf__align_of;
libbpf_find_kernel_btf;
} LIBBPF_0.0.6;