aboutsummaryrefslogtreecommitdiff
path: root/drivers/md/faulty.c
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2009-03-17 18:10:40 -0700
committerDan Williams <dan.j.williams@intel.com>2009-03-31 14:57:49 +1100
commit80c3a6ce4ba4470379b9e6a4d9bcd9d2ee26ae03 (patch)
treede88622f05a7e681ac7bff7714e8f2d8953b66ac /drivers/md/faulty.c
parent93ed05e2a56b5ee06c0100a169433b11c4aa5d0b (diff)
downloadlinaro-lsk-80c3a6ce4ba4470379b9e6a4d9bcd9d2ee26ae03.tar.gz
md: add 'size' as a personality method
In preparation for giving userspace control over ->array_sectors we need to be able to retrieve the 'default' size, and the 'anticipated' size when a reshape is requested. For personalities that do not reshape emit a warning if anything but the default size is requested. In the raid5 case we need to update ->previous_raid_disks to make the new 'default' size available. Reviewed-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/md/faulty.c')
-rw-r--r--drivers/md/faulty.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/md/faulty.c b/drivers/md/faulty.c
index 18793c13727..d76c87f2a83 100644
--- a/drivers/md/faulty.c
+++ b/drivers/md/faulty.c
@@ -283,6 +283,17 @@ static int reconfig(mddev_t *mddev, int layout, int chunk_size)
return 0;
}
+static sector_t faulty_size(mddev_t *mddev, sector_t sectors, int raid_disks)
+{
+ WARN_ONCE(raid_disks,
+ "%s does not support generic reshape\n", __func__);
+
+ if (sectors == 0)
+ return mddev->dev_sectors;
+
+ return sectors;
+}
+
static int run(mddev_t *mddev)
{
mdk_rdev_t *rdev;
@@ -301,7 +312,7 @@ static int run(mddev_t *mddev)
list_for_each_entry(rdev, &mddev->disks, same_set)
conf->rdev = rdev;
- mddev->array_sectors = mddev->dev_sectors;
+ mddev->array_sectors = faulty_size(mddev, 0, 0);
mddev->private = conf;
reconfig(mddev, mddev->layout, -1);
@@ -328,6 +339,7 @@ static struct mdk_personality faulty_personality =
.stop = stop,
.status = status,
.reconfig = reconfig,
+ .size = faulty_size,
};
static int __init raid_init(void)