linux-ext4 - [PATCH 0/2 v2] debugfs: dump a sparse file as a new sparse file

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Date:	Tue,  1 Jan 2013 20:30:13 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	linux-ext4@...r.kernel.org
CC:	"Theodore Ts'o" <tytso@....edu>
Subject: [PATCH 0/2 v2] debugfs: dump a sparse file as a new sparse file

Currently when we use dump command in debugfs to dump a file, all extents will
be dumped to a new file no matter whether these extents are written or not.  If
we want to dump a sparse file, it will waste time to fill zero into the file.
This patch series tries to avoid to dump unwritten extent.

v2 <- v1:
  - split original patch into two parts.
  - make code clearly according to Ted's suggestions

Here is the first version:
  http://patchwork.ozlabs.org/patch/199303/

Regards,
						- Zheng

Zheng Liu (2):
  debugfs: fixup the hard-coded buffer length in dump_file
  debugfs: dump a sparse file as a new sparse file

 debugfs/dump.c      | 25 ++++++++++++++++++++++---
 lib/ext2fs/ext2fs.h |  3 +++
 lib/ext2fs/fileio.c | 50 +++++++++++++++++++++++++++++++++++++++-----------
 3 files changed, 64 insertions(+), 14 deletions(-)

-- 
1.7.12.rc2.18.g61b472e

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