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List: busybox
Subject: switch_root and mount move
From: Sergey Naumov <sknaumov () gmail ! com>
Date: 2012-04-25 13:28:21
Message-ID: CAH3pVZOsDRzdp9f8sKPjJd10NQRFjDMsY6tZWxU++0xATbFeEA () mail ! gmail ! com
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Hello.
Could anyone explain what is the purpose of mount move in switch_root?
From this answer
(http://lists.busybox.net/pipermail/busybox/2009-June/069609.html) I
got reasons why we need to make chroot AND chdir, but can we do it
without mount move?
My problem is that I want to disable ability to remount root to rw by
rsbac, but I need to call rsbac_init in initramfs after all necessary
mounts are done, so at the time switch_root is called
mounting/remounting of root device is prohibited. Simple chroot works,
but I want to clean initramfs content too.
Thanks in advance,
Sergey Naumov.
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