From d6397baee468809ef311e763dfc6e9f73418f8a6 Mon Sep 17 00:00:00 2001
From: Chris Ball <cjb@laptop.org>
Date: Mon, 27 Apr 2009 07:29:03 -0400
Subject: [PATCH] Btrfs: When shrinking, only update disk size on success

Previously, we updated a device's size prior to attempting a shrink
operation.  This patch moves the device resizing logic to only happen if
the shrink completes successfully.  In the process, it introduces a new
field to btrfs_device -- disk_total_bytes -- to track the on-disk size.

Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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