bpftool: Support dumping a map with btf_vmlinux_value_type_id

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This patch makes bpftool support dumping a map's value properly
when the map's value type is a type of the running kernel's btf.
(i.e. map_info.btf_vmlinux_value_type_id is set instead of
map_info.btf_value_type_id).  The first usecase is for the
BPF_MAP_TYPE_STRUCT_OPS.

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/20200115230044.1103008-1-kafai@fb.com

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Martin KaFai Lau 2020-01-15 15:00:44 -08:00 • committed by Alexei Starovoitov

parent 84c72ceee9

commit 4e1ea33292

1 changed files with 50 additions and 11 deletions

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tools/bpf/bpftool/map.c

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