diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2009-03-17 18:10:40 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-03-31 14:57:49 +1100 |
| commit | 80c3a6ce4ba4470379b9e6a4d9bcd9d2ee26ae03 (patch) | |
| tree | de88622f05a7e681ac7bff7714e8f2d8953b66ac /drivers/md/raid1.c | |
| parent | 93ed05e2a56b5ee06c0100a169433b11c4aa5d0b (diff) | |
| download | lwn-80c3a6ce4ba4470379b9e6a4d9bcd9d2ee26ae03.tar.gz lwn-80c3a6ce4ba4470379b9e6a4d9bcd9d2ee26ae03.zip | |
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/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 7eaca3209364..a2a83b0d5a95 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1922,6 +1922,14 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i return nr_sectors; } +static sector_t raid1_size(mddev_t *mddev, sector_t sectors, int raid_disks) +{ + if (sectors) + return sectors; + + return mddev->dev_sectors; +} + static int run(mddev_t *mddev) { conf_t *conf; @@ -2051,7 +2059,7 @@ static int run(mddev_t *mddev) /* * Ok, everything is just fine now */ - mddev->array_sectors = mddev->dev_sectors; + mddev->array_sectors = raid1_size(mddev, 0, 0); mddev->queue->unplug_fn = raid1_unplug; mddev->queue->backing_dev_info.congested_fn = raid1_congested; @@ -2116,7 +2124,7 @@ static int raid1_resize(mddev_t *mddev, sector_t sectors) * any io in the removed space completes, but it hardly seems * worth it. */ - mddev->array_sectors = sectors; + mddev->array_sectors = raid1_size(mddev, sectors, 0); set_capacity(mddev->gendisk, mddev->array_sectors); mddev->changed = 1; if (mddev->array_sectors > mddev->dev_sectors && @@ -2270,6 +2278,7 @@ static struct mdk_personality raid1_personality = .spare_active = raid1_spare_active, .sync_request = sync_request, .resize = raid1_resize, + .size = raid1_size, .check_reshape = raid1_reshape, .quiesce = raid1_quiesce, }; |