netdev - Re: [PATCH net-next v2 2/2] tcp_metrics: add netlink protocol spec in YAML

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]

Date: Fri, 28 Jun 2024 11:24:03 +0100
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
Subject: Re: [PATCH net-next v2 2/2] tcp_metrics: add netlink protocol spec
 in YAML

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

> Add a protocol spec for tcp_metrics, so that it's accessible via YNL.
> Useful at the very least for testing fixes.
>
> In this episode of "10,000 ways to complicate netlink" the metric
> nest has defines which are off by 1. iproute2 does:
>
>         struct rtattr *m[TCP_METRIC_MAX + 1 + 1];
>
>         parse_rtattr_nested(m, TCP_METRIC_MAX + 1, a);
>
>         for (i = 0; i < TCP_METRIC_MAX + 1; i++) {
>                 // ...
>                 attr = m[i + 1];
>
> This is too weird to support in YNL, add a new set of defines
> with _correct_ values to the official kernel header.
>
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>

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