linux-kernel - [PATCH v3 0/2] Print map ID on successful creation

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Message-ID: <20251101193357.111186-1-harshit.m.mogalapalli@oracle.com>
Date: Sat,  1 Nov 2025 12:33:53 -0700
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: bpf@...r.kernel.org
Cc: alan.maguire@...cle.com,
        Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
        Quentin Monnet <qmo@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>,
        Yonghong Song <yonghong.song@...ux.dev>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...ichev.me>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: [PATCH v3 0/2] Print map ID on successful creation

Hi all,

I have tried looking at an issue from the bpftool repository:
https://github.com/libbpf/bpftool/issues/121 and this patch series
tries to add that enhancement.

Summary: Currently when a map creation is successful there is no message
on the terminal, printing IDs on successful creation of maps can help
notify the user and can be used in CI/CD.

The first patch adds the logic for printing and the second patch adds a
simple selftest for the same.

Thank you very much.

V1 --> V2: PATCH 1 updated [Thanks Yonghong for suggesting better way of
error handling with a new label for close(fd); instead of calling
multiple times]

V2 --> V3: Thanks to Quentin.
	PATCH1: drop \n in p_err statement
	PATCH2: Remove messages in cases of successful ID printing. Also
	remove message with a "FAIL:" prefix to make it more consistent.

Regards,
Harshit


Harshit Mogalapalli (2):
  bpftool: Print map ID upon creation and support JSON output
  selftests/bpf: Add test for bpftool map ID printing

 tools/bpf/bpftool/map.c                       | 21 +++++++++---
 .../testing/selftests/bpf/test_bpftool_map.sh | 32 +++++++++++++++++++
 2 files changed, 49 insertions(+), 4 deletions(-)

-- 
2.50.1