From 80c3a6ce4ba4470379b9e6a4d9bcd9d2ee26ae03 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 17 Mar 2009 18:10:40 -0700 Subject: 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 Signed-off-by: Dan Williams --- drivers/md/faulty.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'drivers/md/faulty.c') diff --git a/drivers/md/faulty.c b/drivers/md/faulty.c index 18793c137278..d76c87f2a831 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) -- cgit v1.2.2