bpftool: Match maps by name

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This patch implements lookup by name for maps and changes the behavior of
lookups by tag to be consistent with prog subcommands.  Similarly to
program subcommands, the show and dump commands will return all maps with
the given name (or tag), whereas other commands will error out if several
maps have the same name (resp. tag).

When a map has BTF info, it is dumped in JSON with available BTF info.
This patch requires that all matched maps have BTF info before switching
the output format to JSON.

Signed-off-by: Paul Chaignon <paul.chaignon@orange.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/8de1c9f273860b3ea1680502928f4da2336b853e.1576263640.git.paul.chaignon@gmail.com

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Paul Chaignon 2019-12-13 20:10:37 +01:00 • committed by Alexei Starovoitov

parent a7d22ca2a4

commit 99f9863a0c

4 changed files with 439 additions and 88 deletions

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10

tools/bpf/bpftool/Documentation/bpftool-map.rst

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131

tools/bpf/bpftool/bash-completion/bpftool

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2

tools/bpf/bpftool/main.h

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384

tools/bpf/bpftool/map.c

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