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670bf3e870
This is used by the next patches in the series to support mirror setups not including boot sectors (e.g. mirrors over partitions). . Rework the core procedure of device resolution (by walking along the device-mapper tree during logical device resolution) to be an explicit sequence of pairs (level-lookup, goto-parent-level); . Add an "extended" device to keep a track of file system offset while ascending the device tree; . Identify all possible results of a single level lookup; . Rename target_entry to dmpath_entry; . Make the main() function to look like a call of a handler identified by a pair (driver-id, util-id) and found by the name of the executable. Signed-off-by: Eduard Shishkin <edward6@linux.ibm.com> Reviewed-by: Stefan Haberland <sth@linux.ibm.com> Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>