#include <linux/blkdev.h>
#include <linux/bio.h>
#include <linux/slab.h>
+#include <linux/log2.h>
#define DM_MSG_PREFIX "striped"
/*
* chunk_size is a power of two
*/
- if (!chunk_size || (chunk_size & (chunk_size - 1)) ||
+ if (!is_power_of_2(chunk_size) ||
(chunk_size < (PAGE_SIZE >> SECTOR_SHIFT))) {
ti->error = "Invalid chunk size";
return -EINVAL;
bio->bi_bdev = sc->stripe[stripe].dev->bdev;
bio->bi_sector = sc->stripe[stripe].physical_start +
(chunk << sc->chunk_shift) + (offset & sc->chunk_mask);
- return 1;
+ return DM_MAPIO_REMAPPED;
}
static int stripe_status(struct dm_target *ti,