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Date:   Wed, 26 Jul 2023 02:50:50 +1000
From:   Aleksa Sarai <cyphar@cyphar.com>
To:     David Howells <dhowells@redhat.com>
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Subject: Re: Add fchmodat2() - or add a more general syscall?
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On 2023-07-25, David Howells <dhowells@redhat.com> wrote:
> Rather than adding a fchmodat2() syscall, should we add a "set_file_attrs=
()"
> syscall that takes a mask and allows you to set a bunch of stuff all in o=
ne
> go?  Basically, an interface to notify_change() in the kernel that would =
allow
> several stats to be set atomically.  This might be of particular interest=
 to
> network filesystems.

Presumably looking something like statx(2) (except hopefully with
extensible structs this time :P)? I think that could also be useful, but
given this is a fairly straight-forward syscall addition (and it also
would resolve the AT_EMPTY_PATH issue for chmod as well as simplify the
glibc wrapper), I think it makes sense to take this and we can do
set_statx(2) separately?

--=20
Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
<https://www.cyphar.com/>

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