netdev - Re: [PATCH net-next v2 2/2] tools: ynl: rework the string representation of NlError

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <m21pmnqoyf.fsf@gmail.com>
Date: Tue, 28 Oct 2025 10:51:20 +0000
From: Donald Hunter <donald.hunter@...il.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: davem@...emloft.net,  netdev@...r.kernel.org,  edumazet@...gle.com,
  pabeni@...hat.com,  andrew+netdev@...n.ch,  horms@...nel.org,
  ast@...erby.net
Subject: Re: [PATCH net-next v2 2/2] tools: ynl: rework the string
 representation of NlError

Jakub Kicinski <kuba@...nel.org> writes:

> In early days of YNL development dumping the NlMsg on errors
> was quite useful, as the library itself could have been buggy.
> These days increasingly the NlMsg is just taking up screen space
> and means nothing to a typical user. Try to format the errors
> more in line with how YNL C formats its errors strings.
>
> Before:
>   $ ynl --family ethtool  --do channels-set  --json '{}'
>   Netlink error: Invalid argument
>   nl_len = 44 (28) nl_flags = 0x300 nl_type = 2
> 	error: -22
> 	extack: {'miss-type': 'header'}
>
>   $ ynl --family ethtool  --do channels-set  --json '{..., "tx-count": 999}'
>   Netlink error: Invalid argument
>   nl_len = 88 (72) nl_flags = 0x300 nl_type = 2
> 	error: -22
> 	extack: {'msg': 'requested channel count exceeds maximum', 'bad-attr': '.tx-count'}
>
> After:
>   $ ynl --family ethtool  --do channels-set  --json '{}'
>   Netlink error: Invalid argument {'miss-type': 'header'}
>
>   $ ynl --family ethtool  --do channels-set  --json '{..., "tx-count": 999}'
>   Netlink error: requested channel count exceeds maximum: Invalid argument {'bad-attr': '.tx-count'}
>
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>

Reviewed-by: Donald Hunter <donald.hunter@...il.com>