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Date: Wed, 11 Apr 2007 15:17:26 -0500
From: Eric Sandeen <sandeen@...hat.com>
To: ext4 development <linux-ext4@...r.kernel.org>
Subject: debugfs fill_bgs command?
I was wondering if others think it would be useful to have a "fill_bgs"
command in debugfs; this would (minimally) mark the lower X bgs as full
for both inodes & blocks (possibly either/or), to allow testing the
higher block groups. I'm using a hacked up version of this to do a
little ext3 testing above 8T. Given that this would really only be a
testing option in nature, would it be accepted into e2fsprogs? I'd
probably need some sort of "unfill" command as well, to put the bg
counters back where they should be; probably by actually reading the
bitmaps. This way fsck would still find a consistent filesystem...
I had originally written a set_bg_field function too, to go with inode &
sb variants, though for marking the first few thousand bg's it was going
to get a bit tedious... :)
Thoughts?
Thanks,
-Eric
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