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Date:   Wed, 15 Jan 2020 15:00:12 -0800
From:   Martin KaFai Lau <>
To:     <>
CC:     Alexei Starovoitov <>,
        Daniel Borkmann <>,
        David Miller <>, <>,
Subject: [PATCH v3 bpf-next 0/5] bpftool: Support dumping a map with btf_vmlinux_value_type_id

When a map is storing a kernel's struct, its
map_info->btf_vmlinux_value_type_id is set.  The first map type
supporting it is BPF_MAP_TYPE_STRUCT_OPS.

This series adds support to dump this kind of map with BTF.
The first two patches are bug fixes which are only applicable to

Please see individual patches for details.

- Remove unnecessary #include "libbpf_internal.h" from patch 5

- Expose bpf_find_kernel_btf() as a LIBBPF_API in patch 3 (Andrii)
- Cache btf_vmlinux in bpftool/map.c (Andrii)

Martin KaFai Lau (5):
  bpftool: Fix a leak of btf object
  bpftool: Fix missing BTF output for json during map dump
  libbpf: Expose bpf_find_kernel_btf as a LIBBPF_API
  bpftool: Add struct_ops map name
  bpftool: Support dumping a map with btf_vmlinux_value_type_id

 tools/bpf/bpftool/map.c  | 102 ++++++++++++++++++++++++---------------
 tools/lib/bpf/btf.c      | 102 ++++++++++++++++++++++++++++++++++++---
 tools/lib/bpf/btf.h      |   2 +
 tools/lib/bpf/libbpf.c   |  93 ++---------------------------------
 tools/lib/bpf/ |   1 +
 5 files changed, 166 insertions(+), 134 deletions(-)


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