From: Theodore Tso <tytso-3s7WtUTddSA@public.gmane.org>
To: jim owens <jowens-VXdhtT5mjnY@public.gmane.org>
Cc: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Jamie Lokier <jamie-yetKDKU6eevNLxjTenLetw@public.gmane.org>,
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Mark Fasheh <mfasheh-IBi9RG/b67k@public.gmane.org>,
Michael Kerrisk
<mtk.manpages-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 1/4] vfs: vfs-level fiemap interface
Date: Tue, 7 Oct 2008 14:52:19 -0400 [thread overview]
Message-ID: <20081007185219.GD15929@mit.edu> (raw)
In-Reply-To: <48EB87DE.4090607-VXdhtT5mjnY@public.gmane.org>
Right, thanks. This time in proper English. :-)
* FIEMAP_EXTENT_ENCODED
This extent does not consist of plain filesystem blocks but is
encoded (e.g. encrypted or compressed). Reading the data in this
extent via I/O to the block device will have undefined results.
Note that it is *always* undefined to try to update the data
in-place by writing to the indicated location without the
assistance of the filesystem, or to access the data using the
information returned by the FIEMAP interface while the filesystem
is mounted. In other words, user applications may only read the
extent data via I/O to the block device while the filesystem is
unmounted, and then only if the FIEMAP_EXTENT_ENCODED flag is
clear; user applications must not try reading or writing to the
filesystem via the block device under any other circumstances.
- Ted
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next prev parent reply other threads:[~2008-10-07 18:52 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-03 21:59 [PATCH 0/4] Updated fiemap patches Theodore Ts'o
2008-10-03 21:59 ` [PATCH 1/4] vfs: vfs-level fiemap interface Theodore Ts'o
2008-10-03 21:59 ` [Ocfs2-devel] [PATCH 2/4] ocfs2: fiemap support Theodore Ts'o
2008-10-03 21:59 ` Theodore Ts'o
2008-10-03 21:59 ` [PATCH 3/4] generic block based fiemap implementation Theodore Ts'o
2008-10-03 21:59 ` [PATCH 4/4] Hook ext4 to the vfs fiemap interface Theodore Ts'o
2008-10-06 11:35 ` [PATCH 3/4] generic block based fiemap implementation steve
2008-10-06 21:14 ` Theodore Tso
2008-10-07 8:14 ` steve
2008-10-04 2:12 ` [PATCH 1/4] vfs: vfs-level fiemap interface Theodore Tso
2008-10-06 18:15 ` jim owens
2008-10-06 21:07 ` Theodore Tso
2008-10-07 10:12 ` Christoph Hellwig
2008-10-07 10:56 ` Andreas Dilger
2008-10-07 12:52 ` Theodore Tso
2008-10-07 13:00 ` Jamie Lokier
2008-10-07 13:02 ` Christoph Hellwig
2008-10-07 13:24 ` Jamie Lokier
2008-10-07 13:28 ` Christoph Hellwig
2008-10-07 15:45 ` Theodore Tso
2008-10-07 16:01 ` jim owens
[not found] ` <48EB87DE.4090607-VXdhtT5mjnY@public.gmane.org>
2008-10-07 18:52 ` Theodore Tso [this message]
[not found] ` <20081007185219.GD15929-3s7WtUTddSA@public.gmane.org>
2008-10-07 20:31 ` Christoph Hellwig
2008-10-07 13:48 ` Theodore Tso
2008-10-07 23:43 ` Jamie Lokier
2008-10-09 20:40 ` Andreas Dilger
2008-10-06 13:07 ` steve
-- strict thread matches above, loose matches on Subject: below --
2008-10-09 1:48 PATCH [0/4] Updated**3 fiemap patches Theodore Ts'o
[not found] ` <1223516913-17612-1-git-send-email-tytso-3s7WtUTddSA@public.gmane.org>
2008-10-09 1:48 ` [PATCH 1/4] vfs: vfs-level fiemap interface Theodore Ts'o
2008-10-07 1:06 PATCH [0/4] Updated**2 fiemap patches Theodore Ts'o
2008-10-07 1:06 ` [PATCH 1/4] vfs: vfs-level fiemap interface Theodore Ts'o
[not found] ` <1223341581-13802-2-git-send-email-tytso-3s7WtUTddSA@public.gmane.org>
2008-10-07 1:09 ` Theodore Tso
2008-09-13 18:47 YET ANOTHER resend of the fiemap patches Theodore Ts'o
2008-09-13 18:49 ` [PATCH 1/4] vfs: vfs-level fiemap interface Theodore Ts'o
2008-09-13 21:17 ` Anton Altaparmakov
2008-09-13 21:29 ` Theodore Tso
2008-09-13 21:45 ` Matthew Wilcox
2008-09-13 22:41 ` Theodore Tso
2008-09-13 21:59 ` Anton Altaparmakov
2008-09-14 13:51 ` Christoph Hellwig
2008-09-14 13:48 ` Christoph Hellwig
2008-09-14 17:58 ` Theodore Tso
2008-09-15 14:49 ` Christoph Hellwig
2008-09-15 17:53 ` Mark Fasheh
2008-09-16 6:51 ` Andreas Dilger
2008-09-16 21:31 ` Theodore Tso
2008-09-20 16:47 ` Josef 'Jeff' Sipek
2008-09-29 1:07 ` Theodore Tso
2008-09-29 21:13 ` Mark Fasheh
2008-09-29 22:10 ` Theodore Tso
2008-09-14 13:47 ` Christoph Hellwig
2008-09-14 18:01 ` Theodore Tso
2008-09-14 18:08 ` Christoph Hellwig
2008-09-14 19:58 ` Theodore Tso
2008-09-15 14:47 ` Christoph Hellwig
2008-09-16 6:49 ` Andreas Dilger
2008-09-16 22:03 ` Theodore Tso
2008-09-17 14:18 ` Jörn Engel
2008-09-17 15:02 ` Jamie Lokier
2008-09-17 15:25 ` Theodore Tso
2008-09-19 14:05 ` Chris Mason
2008-09-19 17:38 ` Jamie Lokier
2008-09-20 7:43 ` Dave Chinner
2008-09-20 13:50 ` Chris Mason
2008-09-20 15:36 ` Jamie Lokier
2008-09-20 15:44 ` Christoph Hellwig
2008-09-20 13:50 ` Chris Mason
2008-06-25 22:18 Mark Fasheh
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