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From: Arnd Bergmann <arnd@arndb.de>
To: Richard Sharpe <realrichardsharpe@gmail.com>
Cc: Steve French <smfrench@gmail.com>,
	David Howells <dhowells@redhat.com>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	linux-afs@vger.kernel.org,
	"linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
	samba-technical <samba-technical@lists.samba.org>,
	LKML <linux-kernel@vger.kernel.org>,
	"linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
	Deepa Dinamani <deepa.kernel@gmail.com>
Subject: Re: [RFC][PATCH 0/6] Enhanced file stat system call
Date: Fri, 13 May 2016 17:08:40 +0200	[thread overview]
Message-ID: <2640243.Co6Rj7WIl6@wuerfel> (raw)
In-Reply-To: <CACyXjPw-dY4o4O_ZXzeb9R-akmE-r1uAQ7Sd-dGYegkG932yqw@mail.gmail.com>

On Friday 13 May 2016 07:28:29 Richard Sharpe wrote:
> On Mon, May 9, 2016 at 6:09 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> > On Thursday 05 May 2016 21:00:18 Steve French wrote:
> >> On Thu, May 5, 2016 at 5:54 PM, Steve French <smfrench@gmail.com> wrote:
> >> > On Wed, May 4, 2016 at 8:46 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> >> >> I've discussed this with Deepa in the past, as she is driving the
> >> >> convertion of the inode timestamps to timespec64 now, and we will
> >> >> need a new version of utimensat for her work as well. I can see good
> >> >> reasons either way (allowing updates of btime or disallowing them).
> >> >
> >> It would help interop with Windows (and presumably Mac) if birth time can be
> >> updated
> >
> > Ok, thanks. That is certainly a good reason in favor.
> >
> > If nothing else comes up, I guess we can prepare a patch for a new
> > utimensat variant to do this and wait for more comments on that.

In the meantime I found this LWN article at https://lwn.net/Articles/397442/
Apparently there was a discussion about 6 years ago, without a real
conclusion.

> Isn't there also a strong case for a setattr call that allows us to
> atomically set a collection of attributes from userspace?
> 
> It would seem that network file systems (the clients) could use such features.

I had not heard of this before, but that is obviously another option.
Most of the attributes returned by xstat are read-only, but I guess
this would include uid, gid, {a,b,c,m}time and mode (but not size)
along with a 'valid' mask that decides what to set (as in notify_change),
right?

	Arnd

      reply	other threads:[~2016-05-13 15:08 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-29 12:57 David Howells
2016-04-29 12:57 ` [PATCH 1/6] statx: Add a system call to make enhanced file info available David Howells
2016-05-02 22:46   ` Andreas Dilger
2016-05-02 22:46     ` Andreas Dilger
2016-05-03 15:53   ` David Howells
2016-05-04 22:56   ` Dave Chinner
2016-05-05  0:09     ` NeilBrown
2016-05-05  0:09       ` NeilBrown
2016-05-05 19:48       ` Jeff Layton
2016-05-06 18:07         ` J. Bruce Fields
2016-05-06 18:07           ` J. Bruce Fields
2016-05-05 20:04       ` David Howells
2016-05-05 20:04         ` David Howells
2016-05-06  1:39         ` Dave Chinner
2016-05-06  1:39           ` Dave Chinner
2016-05-06  1:39           ` Dave Chinner
2016-05-06 18:29     ` J. Bruce Fields
2016-05-09  1:45       ` Dave Chinner
2016-05-09  2:46         ` J. Bruce Fields
2016-05-04 23:56   ` NeilBrown
2016-05-08  8:35   ` Christoph Hellwig
2016-05-08  8:35     ` Christoph Hellwig
2016-05-09 12:02     ` Jeff Layton
2016-05-09 12:02       ` Jeff Layton
2016-05-10  7:00       ` Christoph Hellwig
2016-05-10  7:00         ` Christoph Hellwig
2016-05-10 13:21         ` Jeff Layton
2016-05-10 13:21           ` Jeff Layton
2016-05-09 12:57   ` David Howells
2016-05-09 12:57     ` David Howells
2016-05-09 13:23     ` Trond Myklebust
2016-05-09 13:23       ` Trond Myklebust
2016-05-09 13:23       ` Trond Myklebust
2016-05-10  7:04     ` Christoph Hellwig
2016-05-10  8:25     ` David Howells
2016-05-12  9:11       ` Christoph Hellwig
2016-05-13 15:28         ` Arnd Bergmann
2016-05-13 15:28           ` Arnd Bergmann
2016-05-23  8:22           ` Christoph Hellwig
2016-05-23  9:33           ` David Howells
2016-05-18 10:55         ` David Howells
2016-05-09 13:00   ` David Howells
2016-05-09 13:00     ` David Howells
2016-05-09 13:38   ` David Howells
2016-05-10  7:08     ` Christoph Hellwig
2016-05-10  8:43     ` David Howells
2016-05-12  9:12       ` Christoph Hellwig
2016-05-09 13:40   ` David Howells
2016-04-29 12:57 ` [PATCH 2/6] statx: AFS: Return enhanced file attributes David Howells
2016-04-29 12:57 ` [PATCH 3/6] statx: Ext4: " David Howells
2016-05-02 22:48   ` Andreas Dilger
2016-05-03 20:24   ` David Howells
2016-05-03 20:24     ` David Howells
2016-05-08  8:38   ` Christoph Hellwig
2016-05-08  8:38     ` Christoph Hellwig
2016-04-29 12:58 ` [PATCH 4/6] statx: NFS: " David Howells
2016-05-02 22:48   ` Andreas Dilger
2016-04-29 12:58 ` [PATCH 5/6] statx: Make windows attributes available for CIFS, NTFS and FAT to use David Howells
2016-05-02 22:52   ` Andreas Dilger
2016-10-03 21:03     ` Steve French
2016-10-03 21:03       ` Steve French
2016-05-03 20:23   ` David Howells
2016-05-08  8:39   ` Christoph Hellwig
2016-05-08  8:39     ` Christoph Hellwig
2016-04-29 12:58 ` [PATCH 6/6] statx: CIFS: Return enhanced attributes David Howells
2016-04-30 21:05 ` [RFC][PATCH 0/6] Enhanced file stat system call Jeff Layton
2016-04-30 21:05   ` Jeff Layton
2016-05-04 13:46 ` Arnd Bergmann
2016-05-04 13:46   ` Arnd Bergmann
2016-05-05 22:54   ` Steve French
2016-05-06  2:00     ` Steve French
2016-05-09 13:09       ` Arnd Bergmann
2016-05-09 13:09         ` Arnd Bergmann
2016-05-13 14:28         ` Richard Sharpe
2016-05-13 14:28           ` Richard Sharpe
2016-05-13 15:08           ` Arnd Bergmann [this message]

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