linux-kernel - Re: [RFC 00/19] Kernel API Specification Framework

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: <CACT4Y+Y_RQX55fNTLAjEQJYp3TY5a1yYZjx42BYu=vfObWzTBQ@mail.gmail.com>
Date: Wed, 25 Jun 2025 10:49:08 +0200
From: Dmitry Vyukov <dvyukov@...gle.com>
To: Sasha Levin <sashal@...nel.org>
Cc: kees@...nel.org, elver@...gle.com, linux-api@...r.kernel.org, 
	linux-kernel@...r.kernel.org, tools@...nel.org, workflows@...r.kernel.org
Subject: Re: [RFC 00/19] Kernel API Specification Framework

On Tue, 24 Jun 2025 at 22:04, Sasha Levin <sashal@...nel.org> wrote:

> >3. To reduce duplication we could use more type information, e.g. I was always
> >frustrated that close is just:
> >
> >SYSCALL_DEFINE1(close, unsigned int, fd)
> >
> >whereas if we would do:
> >
> >typedef int fd_t;
> >SYSCALL_DEFINE1(close, fd_t, fd)
> >
> >then all semantic info about the arg is already in the code.
>
> Yup. It would also be great if we completely drop the SYSCALL_DEFINE()
> part and have it be automatically generated by the spec itself, but I
> couldn't wrap my head around doing this in C macro just yet.

At some point I was looking at boost.pp library as the source of info
on how to do things. It provides a set of containers and algorithms on
them:
https://www.boost.org/doc/libs/latest/libs/preprocessor/doc/index.html

Sequences may be the most appealing b/c they support variable number
of elements, and don't need specifying number of elements explicitly:
https://www.boost.org/doc/libs/latest/libs/preprocessor/doc/data/sequences.html
A sequence then allows generating multiple things from it using
foreach over elements.