linux-ext4 - [PATCH 0/3] e2fsprogs: new tools e2info/e2spacey

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Date:   Wed, 01 Mar 2017 20:52:06 -0800
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     tytso@....edu, darrick.wong@...cle.com
Cc:     linux-ext4@...r.kernel.org
Subject: [PATCH 0/3] e2fsprogs: new tools e2info/e2spacey

Hi all,

Here are some minor fixes and two new e2fsprogs tools!  The first patch
fixes a bunch of compiler warnings.

The first tool, e2info, uses the proposed ext4 geometry ioctl to query a
mounted ext4 filesystem for geometry information and prints it.

The second tool, e2spacey, uses the proposed GETFSMAP and ext4 ioctls to
find all the free space on a mounted filesystem to display a histogram
of extent sizes, or optionally how much free space can be found in each
flexbg.  (Note: the xfs_io tool can be used for general getfsmap queries
on ext4 filesystems.)

If you want to go play with these tools, you can grab the source from my
git repo[1].  You'll need the patches on mailing list, or my
djwong-devel kernel tree[2].

This is a tremendous way to eat your data!

--D

[1] https://git.kernel.org/cgit/linux/kernel/git/djwong/e2fsprogs.git/log/?h=djwong-devel
[2] https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-linux.git/log/?h=djwong-devel