tree b8f20c01239674eea287c1665fbf96fb92dfcb00
parent 59bc5c758ece00fb0b2a170dd8fbbf31f1856c8a
author Chris Ball <cjb@laptop.org> 1240831743 -0400
committer Chris Mason <chris.mason@oracle.com> 1240832451 -0400

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>