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>
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 3f91c2e..832fb4d 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2480,7 +2480,7 @@
rdev_clear_badblocks(
rdev,
r10_bio->devs[m].addr,
- r10_bio->sectors);
+ r10_bio->sectors, 0);
} else {
if (!rdev_set_badblocks(
rdev,
@@ -2496,7 +2496,7 @@
rdev_clear_badblocks(
rdev,
r10_bio->devs[m].addr,
- r10_bio->sectors);
+ r10_bio->sectors, 0);
} else {
if (!rdev_set_badblocks(
rdev,
@@ -2515,7 +2515,7 @@
rdev_clear_badblocks(
rdev,
r10_bio->devs[m].addr,
- r10_bio->sectors);
+ r10_bio->sectors, 0);
rdev_dec_pending(rdev, conf->mddev);
} else if (bio != NULL &&
!test_bit(BIO_UPTODATE, &bio->bi_flags)) {
@@ -2532,7 +2532,7 @@
rdev_clear_badblocks(
rdev,
r10_bio->devs[m].addr,
- r10_bio->sectors);
+ r10_bio->sectors, 0);
rdev_dec_pending(rdev, conf->mddev);
}
}
