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md/raid5: make sure curr_sync_completes is uptodate when reshape starts

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This value is visible through sysfs and is used by mdadm
when it manages a reshape (backing up data that is about to be
rearranged).  So it is important that it is always correct.
Current it does not get updated properly when a reshape
starts which can cause problems when assembling an array
that is in the middle of being reshaped.

This is suitable for 2.6.31.y stable kernels.

Cc: stable@kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2009-11-06 14:59:29 +11:00
parent 24395a85d8
commit 8dee721146
1 changed files with 2 additions and 0 deletions
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2
drivers/md/raid5.c
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@ -4049,6 +4049,8 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped
sector_nr = conf->reshape_progress;
sector_div(sector_nr, new_data_disks);
if (sector_nr) {
mddev->curr_resync_completed = sector_nr;
sysfs_notify(&mddev->kobj, NULL, "sync_completed");
*skipped = 1;
return sector_nr;
}