From: Dave Chinner <david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org>
To: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Andreas Dilger <adilger-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org>,
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
samba-technical-w/Ol4Ecudpl8XjKLYN78aQ@public.gmane.org,
linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
wine-devel-5vRYHf7vrtgdnm+yROfE0A@public.gmane.org,
kfm-devel-RoXCvvDuEio@public.gmane.org,
nautilus-list-rDKQcyrBJuzYtjvyW6yDsg@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
libc-alpha-9JcytcrH/bA+uJoB2kUjGw@public.gmane.org
Subject: Re: [PATCH 1/6] xstat: Add a pair of system calls to make extended file stats available
Date: Fri, 27 Apr 2012 10:51:21 +1000 [thread overview]
Message-ID: <20120427005121.GD9541@dastard> (raw)
In-Reply-To: <18195.1335447156-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Thu, Apr 26, 2012 at 02:32:36PM +0100, David Howells wrote:
> Andreas Dilger <adilger-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org> wrote:
> > st_blksize may be variable for a distributed filesystem,
It can be variable for local filesystems, too. XFS will vary the
block size based on the configuration of the inode. e.g. if there is
an extent allocation size hint on the inode, or it's on the realtime
device, and so on. There is no guarantee that from file to file that
it is constant.
> I wonder if there's a way to make this explicit - or is it something that if
> the bit isn't set, you can't use the value in st_blksize.
> I wonder if this
> value always has to be non-zero to make sure existing stat() doesn't explode.
More likely it probably needs to be non-zero to prevent applications
doing division by block size from exploding... ;)
Cheers,
Dave.
--
Dave Chinner
david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org
next prev parent reply other threads:[~2012-04-27 0:51 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-19 14:05 [PATCH 0/6] Extended file stat system call David Howells
2012-04-19 14:06 ` [PATCH 3/6] xstat: AFS: Return extended attributes David Howells
2012-04-19 14:06 ` [PATCH 4/6] xstat: NFS: " David Howells
[not found] ` <20120419140653.17272.95035.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-19 14:35 ` Myklebust, Trond
2012-04-26 13:52 ` David Howells
2012-04-19 14:07 ` [PATCH 5/6] xstat: CIFS: " David Howells
[not found] ` <20120419140706.17272.72290.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-19 15:19 ` Steve French
[not found] ` <20120419140558.17272.74360.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-19 14:06 ` [PATCH 1/6] xstat: Add a pair of system calls to make extended file stats available David Howells
2012-04-19 23:36 ` Andreas Dilger
[not found] ` <20120419140612.17272.57774.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-24 21:29 ` J. Bruce Fields
[not found] ` <20120424212911.GA26073-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2012-04-24 22:08 ` Steve French
2012-04-25 14:44 ` Andreas Dilger
2012-04-26 13:45 ` David Howells
[not found] ` <18765.1335447954-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 14:28 ` J. Bruce Fields
2012-04-26 17:06 ` Steve French
2012-04-26 13:32 ` David Howells
[not found] ` <18195.1335447156-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-27 0:51 ` Dave Chinner [this message]
2012-04-27 3:11 ` Andreas Dilger
2012-04-26 13:40 ` David Howells
[not found] ` <18533.1335447617-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 14:23 ` J. Bruce Fields
2012-04-19 14:06 ` [PATCH 2/6] xstat: Ext4: Return extended attributes David Howells
[not found] ` <20120419140625.17272.23303.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2012-04-19 16:03 ` Steve French
2012-04-26 13:47 ` David Howells
2012-04-26 17:00 ` Steve French
2012-04-19 14:07 ` [PATCH 6/6] xstat: eCryptFS: " David Howells
2012-04-19 17:11 ` [PATCH 0/6] Extended file stat system call Steve French
2012-04-27 1:06 ` Dave Chinner
2012-04-27 3:22 ` Andreas Dilger
[not found] ` <ED5B8F1B-6C99-4516-85FA-A767E94B635F-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org>
2012-04-28 0:38 ` Dave Chinner
2012-04-28 0:54 ` Steve French
2012-05-08 20:19 ` Extended file stat: Splitting file- and fs-specific info? David Howells
2012-05-08 21:13 ` Myklebust, Trond
[not found] ` <16281.1336508382-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-05-09 0:24 ` Dave Chinner
2012-05-09 1:09 ` J. Bruce Fields
2012-05-09 4:25 ` Dave Chinner
2012-05-09 11:14 ` J. Bruce Fields
2012-05-09 1:16 ` Andreas Dilger
2012-05-10 9:23 ` David Howells
[not found] ` <14477.1336641794-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-05-10 16:05 ` Andreas Dilger
2012-05-10 17:10 ` Roland McGrath
2012-05-11 8:54 ` Andreas Dilger
2012-05-09 9:21 ` David Howells
[not found] ` <20170.1336555274-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-05-09 11:19 ` Christoph Hellwig
[not found] ` <20120509111958.GA11345-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2012-05-09 11:55 ` Bernd Schubert
[not found] ` <4FAA5B24.1020306-mPn0NPGs4xGatNDF+KUbs4QuADTiUCJX@public.gmane.org>
2012-05-09 12:05 ` Christoph Hellwig
[not found] ` <20120509120544.GA17535-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2012-05-09 12:25 ` Bernd Schubert
2012-05-09 13:51 ` Andreas Dilger
2012-05-09 14:12 ` Bernd Schubert
2012-05-10 9:14 ` David Howells
2012-04-19 16:32 ` [PATCH 0/6] Extended file stat system call Roland McGrath
2012-04-19 21:51 ` Paul Eggert
2012-04-19 23:05 ` Roland McGrath
2012-04-26 14:16 ` David Howells
[not found] ` <20173.1335449760-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 18:22 ` Roland McGrath
[not found] ` <4F9088D6.9020203-764C0pRuGfqVc3sceRu5cw@public.gmane.org>
2012-04-26 14:04 ` David Howells
[not found] ` <19638.1335449047-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 18:24 ` Roland McGrath
2012-04-19 23:29 ` Andreas Dilger
2012-04-26 13:54 ` David Howells
[not found] ` <19184.1335448455-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 18:25 ` Roland McGrath
2012-04-27 23:54 ` Paul Eggert
[not found] ` <20120426182524.E5ADF2C0EC-j1d2VQoJOwwHfwO+Tb3JRVaTQe2KTcn/@public.gmane.org>
2012-04-26 21:54 ` David Howells
[not found] ` <9931.1335477281-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 22:02 ` Roland McGrath
2012-04-26 22:21 ` Nix
2012-04-26 14:25 ` David Howells
2012-04-26 14:54 ` Steve French
[not found] ` <CAH2r5mv1Lijdwk5zsQwYJr4Etb6fhrRyNXm-iFCQX+HecboGrQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-26 15:25 ` Myklebust, Trond
2012-04-26 16:56 ` Steve French
[not found] ` <CAH2r5mt5af-_hxBRKK72iD5Gr99bo91ec78Rov8EGVEx8=21mA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-26 17:00 ` Myklebust, Trond
2012-04-26 17:03 ` Steve French
[not found] ` <CAH2r5mvmCfLrxRHje6Wx5X84zxPEHwRMUJGsjvWBujMu7w841w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-26 17:06 ` Myklebust, Trond
[not found] ` <1335460011.9701.30.camel-SyLVLa/KEI9HwK5hSS5vWB2eb7JE58TQ@public.gmane.org>
2012-04-26 17:09 ` Steve French
[not found] ` <CAH2r5muXk+frkFz9X523Ny=RMwJGeqOPH75G1ToNa5QoMo5SkQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-04-26 17:10 ` Steve French
2012-04-26 21:57 ` David Howells
[not found] ` <10104.1335477476-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-26 22:05 ` Roland McGrath
[not found] ` <20120426220552.D98D62C0D3-j1d2VQoJOwwHfwO+Tb3JRVaTQe2KTcn/@public.gmane.org>
2012-04-27 0:33 ` Myklebust, Trond
2012-04-27 0:30 ` Myklebust, Trond
2012-04-26 15:52 ` David Howells
2012-04-27 0:29 ` Andreas Dilger
[not found] ` <3F302713-B675-4BAA-B2B7-235E03C5975F-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org>
2012-04-27 9:19 ` David Howells
2012-04-27 9:39 ` David Howells
[not found] ` <4111.1335519545-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-27 13:13 ` Dave Chinner
2012-04-27 15:10 ` J. Bruce Fields
2012-04-27 19:31 ` Andreas Dilger
2012-04-28 0:58 ` Dave Chinner
2012-05-10 9:51 ` David Howells
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