From: Philipp Reisner <philipp.reisner@linbit.com>
Date: Wed, 14 Dec 2011 17:01:21 +0000 (+0100)
Subject: drbd: Consider the disk-timeout also for meta-data IO operations
X-Git-Tag: v3.5-rc1~41^2^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7caacb69ac468ea713e8e8ba77be8040d8fe7bbe;p=pandora-kernel.git

drbd: Consider the disk-timeout also for meta-data IO operations

If the backing device is already frozen during attach, we failed
to recognize that. The current disk-timeout code works on top
of the drbd_request objects. During attach we do not allow IO
and therefore never generate a drbd_request object but block
before that in drbd_make_request().

This patch adds the timeout to all drbd_md_sync_page_io().

Before this patch we used to go from D_ATTACHING directly
to D_DISKLESS if IO failed during attach. We can no longer
do this since we have to stay in D_FAILED until all IO
ops issued to the backing device returned.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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