linux-ext4 - e4defrag and immutable files

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Message-ID: <4C002427.3010706@zytor.com>
Date:	Fri, 28 May 2010 13:14:31 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	linux-ext4@...r.kernel.org
Subject: e4defrag and immutable files

Hi all,

I have looked a bit at e4defrag, and it does not appear to prevent the
relocation of files marked immutable.  This is a problem for boot
loaders, which may need to have a block pointer to a specific file in
order to bootstrap themselves.

Would it be possible to either:

a) prevent e4defrag and/or EXT4_IOC_MOVE_EXT from relocating an
immutable file, or
b) add a new attribute with the above property (in case there is
legitimate need to move around immutable files)?

	-hpa
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