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path: root/drivers/md/md.c
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Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c35
1 files changed, 30 insertions, 5 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 4edcda8f4869..4869128bf742 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3001,6 +3001,9 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
return -EINVAL;
}
+ list_for_each_entry(rdev, &mddev->disks, same_set)
+ rdev->new_raid_disk = rdev->raid_disk;
+
/* ->takeover must set new_* and/or delta_disks
* if it succeeds, and may set them when it fails.
*/
@@ -3051,13 +3054,35 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
mddev->safemode = 0;
}
- module_put(mddev->pers->owner);
- /* Invalidate devices that are now superfluous */
- list_for_each_entry(rdev, &mddev->disks, same_set)
- if (rdev->raid_disk >= mddev->raid_disks) {
- rdev->raid_disk = -1;
+ list_for_each_entry(rdev, &mddev->disks, same_set) {
+ char nm[20];
+ if (rdev->raid_disk < 0)
+ continue;
+ if (rdev->new_raid_disk > mddev->raid_disks)
+ rdev->new_raid_disk = -1;
+ if (rdev->new_raid_disk == rdev->raid_disk)
+ continue;
+ sprintf(nm, "rd%d", rdev->raid_disk);
+ sysfs_remove_link(&mddev->kobj, nm);
+ }
+ list_for_each_entry(rdev, &mddev->disks, same_set) {
+ if (rdev->raid_disk < 0)
+ continue;
+ if (rdev->new_raid_disk == rdev->raid_disk)
+ continue;
+ rdev->raid_disk = rdev->new_raid_disk;
+ if (rdev->raid_disk < 0)
clear_bit(In_sync, &rdev->flags);
+ else {
+ char nm[20];
+ sprintf(nm, "rd%d", rdev->raid_disk);
+ if(sysfs_create_link(&mddev->kobj, &rdev->kobj, nm))
+ printk("md: cannot register %s for %s after level change\n",
+ nm, mdname(mddev));
}
+ }
+
+ module_put(mddev->pers->owner);
mddev->pers = pers;
mddev->private = priv;
strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel));