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[PATCH] md: Split reshape handler in check_reshape and start_reshape

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check_reshape checks validity and does things that can be done instantly -
like adding devices to raid1.  start_reshape initiates a restriping process to
convert the whole array.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown
2006-03-27 01:18:13 -08:00
committed by Linus Torvalds
parent b578d55fdd
commit 63c70c4f3a
4 changed files with 58 additions and 34 deletions
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10
drivers/md/md.c
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@@ -2594,7 +2594,7 @@ static int do_md_run(mddev_t * mddev)
strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel));
if (mddev->reshape_position != MaxSector &&
pers->reshape == NULL) {
pers->start_reshape == NULL) {
/* This personality cannot handle reshaping... */
mddev->pers = NULL;
module_put(pers->owner);
@@ -3556,14 +3556,16 @@ static int update_raid_disks(mddev_t *mddev, int raid_disks)
{
int rv;
/* change the number of raid disks */
if (mddev->pers->reshape == NULL)
if (mddev->pers->check_reshape == NULL)
return -EINVAL;
if (raid_disks <= 0 ||
raid_disks >= mddev->max_disks)
return -EINVAL;
if (mddev->sync_thread)
if (mddev->sync_thread || mddev->reshape_position != MaxSector)
return -EBUSY;
rv = mddev->pers->reshape(mddev, raid_disks);
mddev->delta_disks = raid_disks - mddev->raid_disks;
rv = mddev->pers->check_reshape(mddev);
return rv;
}