From: Luis Chamberlain <[email protected]> Today dm-zoned relies on the assumption that you have a zone size with a power of 2. Even though the block layer today enforces this requirement, these devices do exist and so provide a stop-gap measure to ensure these devices cannot be used by mistake
Signed-off-by: Luis Chamberlain <[email protected]> Signed-off-by: Pankaj Raghav <[email protected]> --- drivers/md/dm-zone.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/md/dm-zone.c b/drivers/md/dm-zone.c index 57daa86c19cf..221e0aa0f1a7 100644 --- a/drivers/md/dm-zone.c +++ b/drivers/md/dm-zone.c @@ -231,6 +231,18 @@ static int dm_revalidate_zones(struct mapped_device *md, struct dm_table *t) struct request_queue *q = md->queue; unsigned int noio_flag; int ret; + struct block_device *bdev = md->disk->part0; + sector_t zone_sectors; + char bname[BDEVNAME_SIZE]; + + zone_sectors = bdev_zone_sectors(bdev); + + if (!is_power_of_2(zone_sectors)) { + DMWARN("%s: %s only power of two zone size supported\n", + dm_device_name(md), + bdevname(bdev, bname)); + return 1; + } /* * Check if something changed. If yes, cleanup the current resources -- 2.25.1 _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
