From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Fri, 13 Feb 2015 03:31:21 +0000 (-0500)
Subject: ext4: support read-only images
X-Git-Tag: fixes-v4.0-rc1~18^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2cb5cc8b09c939c77826635956c35995b15c9331;p=pandora-kernel.git

ext4: support read-only images

Add a rocompat feature, "readonly" to mark a FS image as read-only.
The feature prevents the kernel and e2fsprogs from changing the image;
the flag can be toggled by tune2fs.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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