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authorNeilBrown <neilb@suse.de>2012-05-21 09:27:00 +1000
committerNeilBrown <neilb@suse.de>2012-05-21 09:27:00 +1000
commitc6563a8c38fde3c1c7fc925a10bde3ca20799301 (patch)
tree3916ae8247149a9dcf39ee1ca262f97be39071eb /sound
parent2c810cddc44d6f95cef75df3f07fc0850ff92417 (diff)
downloadop-kernel-dev-c6563a8c38fde3c1c7fc925a10bde3ca20799301.zip
op-kernel-dev-c6563a8c38fde3c1c7fc925a10bde3ca20799301.tar.gz
md: add possibility to change data-offset for devices.
When reshaping we can avoid costly intermediate backup by changing the 'start' address of the array on the device (if there is enough room). So as a first step, allow such a change to be requested through sysfs, and recorded in v1.x metadata. (As we didn't previous check that all 'pad' fields were zero, we need a new FEATURE flag for this. A (belatedly) check that all remaining 'pad' fields are zero to avoid a repeat of this) The new data offset must be requested separately for each device. This allows each to have a different change in the data offset. This is not likely to be used often but as data_offset can be set per-device, new_data_offset should be too. This patch also removes the 'acknowledged' arg to rdev_set_badblocks as it is never used and never will be. At the same time we add a new arg ('in_new') which is currently always zero but will be used more soon. When a reshape finishes we will need to update the data_offset and rdev->sectors. So provide an exported function to do that. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'sound')
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