linux-kernel - Re: Add fchmodat2() - or add a more general syscall?

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Message-ID: <87fs5c3rbl.fsf@oldenburg3.str.redhat.com>
Date:   Tue, 25 Jul 2023 18:10:22 +0200
From:   Florian Weimer <fweimer@...hat.com>
To:     David Howells <dhowells@...hat.com>
Cc:     Alexey Gladkov <legion@...nel.org>,
        James.Bottomley@...senPartnership.com, acme@...nel.org,
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Subject: Re: Add fchmodat2() - or add a more general syscall?

* David Howells:

> 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 one
> 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.

Do you mean atomically as in compare-and-swap (update only if old values
match), or just a way to update multiple file attributes with a single
system call?

Thanks,
Florian