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libbpf: add bpf_btf_get_next_id() to cycle through BTF objects

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Add an API function taking a BTF object id and providing the id of the
next BTF object in the kernel. This can be used to list all BTF objects
loaded on the system.

v2:
- Rebase on top of Andrii's changes regarding libbpf versioning.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Quentin Monnet
2019-08-20 10:31:53 +01:00
committed by Alexei Starovoitov
parent a6e130c420
commit 09d7c2e32b
3 changed files with 8 additions and 0 deletions
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2
tools/lib/bpf/libbpf.map
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@@ -186,4 +186,6 @@ LIBBPF_0.0.4 {
} LIBBPF_0.0.3;
LIBBPF_0.0.5 {
global:
bpf_btf_get_next_id;
} LIBBPF_0.0.4;