From 92e59b6ba21845fadd2cce725010a9351740b76e Mon Sep 17 00:00:00 2001 From: raz ben yehuda Date: Tue, 16 Jun 2009 17:00:57 +1000 Subject: md: raid0: chunk size check in raid0_run have raid0 check chunk size in run method instead of in md. This is part of a series moving the checks from common code to the personalities where they belong. hardsect is short and chunksize is an int, so it is safe to use %. Signed-off-by: raziebe@gmail.com Signed-off-by: NeilBrown --- drivers/md/raid0.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index 62fde23bf28..39936a217f9 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -234,6 +234,16 @@ static int create_strip_zones(mddev_t *mddev) mddev->queue->backing_dev_info.congested_fn = raid0_congested; mddev->queue->backing_dev_info.congested_data = mddev; + /* + * now since we have the hard sector sizes, we can make sure + * chunk size is a multiple of that sector size + */ + if (mddev->chunk_size % queue_logical_block_size(mddev->queue)) { + printk(KERN_ERR "%s chunk_size of %d not valid\n", + mdname(mddev), + mddev->chunk_size); + goto abort; + } printk(KERN_INFO "raid0: done.\n"); mddev->private = conf; return 0; @@ -289,8 +299,9 @@ static int raid0_run(mddev_t *mddev) { int ret; - if (mddev->chunk_size == 0) { - printk(KERN_ERR "md/raid0: non-zero chunk size required.\n"); + if (mddev->chunk_size == 0 || + !is_power_of_2(mddev->chunk_size)) { + printk(KERN_ERR "md/raid0: chunk size must be a power of 2.\n"); return -EINVAL; } blk_queue_max_sectors(mddev->queue, mddev->chunk_size >> 9); -- cgit v1.2.3