From mboxrd@z Thu Jan  1 00:00:00 1970
From: Florian Weimer <fweimer@redhat.com>
Subject: Re: Add fchmodat2() - or add a more general syscall?
Date: Tue, 25 Jul 2023 18:10:22 +0200
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In-Reply-To: <104971.1690300714@warthog.procyon.org.uk> (David Howells's
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To: David Howells <dhowells@redhat.com>
Cc: dalias@libc.org, linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, alexander.shishkin@linux.intel.com, stefan@agner.ch, ldv@altlinux.org, James.Bottomley@HansenPartnership.com, kim.phillips@arm.com, paulus@samba.org, deepa.kernel@gmail.com, hpa@zytor.com, sparclinux@vger.kernel.org, linux-api@vger.kernel.org, will@kernel.org, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, hare@suse.com, Arnd Bergmann <arnd@arndb.de>, ysato@users.sourceforge.jp, deller@gmx.de, x86@kernel.org, linux@armlinux.org.uk, borntraeger@de.ibm.com, mingo@redhat.com, geert@linux-m68k.org, catalin.marinas@arm.com, jhogan@kernel.org, mattst88@gmail.com, fenghua.yu@intel.com, gor@linux.ibm.com, glebfm@altlinux.org, tycho@tycho.ws, acme@kernel.org, linux-m68k@lists.linux-m68k.org, ink@jurassic.park.msu.ru, viro@zeniv.linux.org.uk, luto@kernel.org, namhyung@kernel.org, tglx@linutronix.de, christian@bra

* 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