From: Joe Thornber <ejt@redhat.com>
Date: Fri, 27 Jul 2012 14:08:16 +0000 (+0100)
Subject: dm thin: add read only and fail io modes
X-Git-Tag: v3.6-rc1~56^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e49e582965b3694f07a106adc83ddb44aa4f0890;p=pandora-kernel.git

dm thin: add read only and fail io modes

Add read-only and fail-io modes to thin provisioning.

If a transaction commit fails the pool's metadata device will transition
to "read-only" mode.  If a commit fails once already in read-only mode
the transition to "fail-io" mode occurs.

Once in fail-io mode the pool and all associated thin devices will
report a status of "Fail".

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

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