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From: Florian Weimer <fw-d32yF4oPJVt0XxTmqZlbVQ@public.gmane.org>
To: "H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
Cc: "Richard W.M. Jones"
	<rjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org,
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Subject: Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask]
Date: Wed, 13 Apr 2016 22:45:05 +0200	[thread overview]
Message-ID: <87shypck6m.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <570EA006.5010608-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org> (H. Peter Anvin's message of "Wed, 13 Apr 2016 12:37:42 -0700")

* H. Peter Anvin:

> I have to say I'm skeptic to the need for umask2() as opposed to
> getumask().

I find the extension with a set-the-thread umask somewhat unlikely.
How would a potential per-thread umask interact with CLONE_FS?
Have a per-thread umask that, when active, overrides the global
one, similar to what uselocale provides?  That seems rather messy,
and I'm not aware of any precedent.

WARNING: multiple messages have this Message-ID (diff)
From: Florian Weimer <fw@deneb.enyo.de>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Richard W.M. Jones" <rjones@redhat.com>,
	linux-kernel@vger.kernel.org, tglx@linutronix.de,
	mingo@redhat.com, akpm@linux-foundation.org, luto@kernel.org,
	viro@zeniv.linux.org.uk, mathieu.desnoyers@efficios.com,
	zab@redhat.com, paulmck@linux.vnet.ibm.com, aarcange@redhat.com,
	josh@joshtriplett.org, xemul@parallels.com, sfr@canb.auug.org.au,
	milosz@adfin.com, rostedt@goodmis.org, arnd@arndb.de,
	ebiederm@xmission.com, gorcunov@openvz.org,
	iulia.manda21@gmail.com, dave.hansen@linux.intel.com,
	mguzik@redhat.com, adobriyan@gmail.com, dave@stgolabs.net,
	linux-api@vger.kernel.org, gorcunov@gmail.com,
	walters@verbum.org
Subject: Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask]
Date: Wed, 13 Apr 2016 22:45:05 +0200	[thread overview]
Message-ID: <87shypck6m.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <570EA006.5010608@zytor.com> (H. Peter Anvin's message of "Wed, 13 Apr 2016 12:37:42 -0700")

* H. Peter Anvin:

> I have to say I'm skeptic to the need for umask2() as opposed to
> getumask().

I find the extension with a set-the-thread umask somewhat unlikely.
How would a potential per-thread umask interact with CLONE_FS?
Have a per-thread umask that, when active, overrides the global
one, similar to what uselocale provides?  That seems rather messy,
and I'm not aware of any precedent.

  parent reply	other threads:[~2016-04-13 20:45 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-13 19:05 [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask] Richard W.M. Jones
2016-04-13 19:05 ` Richard W.M. Jones
2016-04-13 19:05 ` [PATCH v4 1/3] vfs: Define new syscall umask2 Richard W.M. Jones
2016-04-13 19:05 ` [PATCH v4 2/3] x86: Wire up new umask2 system call on x86 Richard W.M. Jones
     [not found]   ` <1460574336-18930-3-git-send-email-rjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-04-13 19:57     ` kbuild test robot
2016-04-13 19:57       ` kbuild test robot
2016-04-13 19:05 ` [PATCH v4 3/3] vfs: selftests: Add test for umask2 system call Richard W.M. Jones
2016-04-13 19:37 ` [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask] H. Peter Anvin
     [not found]   ` <570EA006.5010608-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2016-04-13 20:45     ` Florian Weimer [this message]
2016-04-13 20:45       ` Florian Weimer
     [not found]       ` <87shypck6m.fsf-ZqZwdwZz9NfTBotR3TxKnbNAH6kLmebB@public.gmane.org>
2016-04-13 20:53         ` Richard W.M. Jones
2016-04-13 20:53           ` Richard W.M. Jones
     [not found] ` <1460574336-18930-1-git-send-email-rjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-04-13 19:29   ` umask2 man page (was: Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask]) Richard W.M. Jones
2016-04-13 19:29     ` Richard W.M. Jones
2016-04-13 23:09   ` [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask] Stephen Rothwell
2016-04-13 23:09     ` Stephen Rothwell
2016-04-14  9:15     ` Richard W.M. Jones

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