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To help users check what version of libbpf is being used with bpftool,
print the number along with bpftool's own version number.
Output:
$ ./bpftool version
./bpftool v5.16.0
using libbpf v0.7
features: libbfd, libbpf_strict, skeletons
$ ./bpftool version --json --pretty
{
"version": "5.16.0",
"libbpf_version": "0.7",
"features": {
"libbfd": true,
"libbpf_strict": true,
"skeletons": true
}
}
Note that libbpf does not expose its patch number.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220210104237.11649-2-quentin@isovalent.com
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35 lines
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.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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-h, --help
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Print short help message (similar to **bpftool help**).
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-V, --version
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Print bpftool's version number (similar to **bpftool version**), the
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number of the libbpf version in use, and optional features that were
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included when bpftool was compiled. Optional features include linking
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against libbfd to provide the disassembler for JIT-ted programs
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(**bpftool prog dump jited**) and usage of BPF skeletons (some
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features like **bpftool prog profile** or showing pids associated to
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BPF objects may rely on it).
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-j, --json
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Generate JSON output. For commands that cannot produce JSON, this
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option has no effect.
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-p, --pretty
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Generate human-readable JSON output. Implies **-j**.
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-d, --debug
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Print all logs available, even debug-level information. This includes
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logs from libbpf as well as from the verifier, when attempting to
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load programs.
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-l, --legacy
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Use legacy libbpf mode which has more relaxed BPF program
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requirements. By default, bpftool has more strict requirements
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about section names, changes pinning logic and doesn't support
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some of the older non-BTF map declarations.
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See https://github.com/libbpf/libbpf/wiki/Libbpf:-the-road-to-v1.0
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for details.
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