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authorDamien Le Moal <damien.lemoal@wdc.com>2018-10-12 13:08:46 +0300
committerJens Axboe <axboe@kernel.dk>2018-10-25 20:17:40 +0300
commit65e4e3eee83d7a4ad7e8c5175b2a0ddfd3b5685f (patch)
tree26d26b7a24b1a45799b38fb80f1ebf02a84e5424 /block/ioctl.c
parent72cd87576d1d885fc2968416ed5aca8f54749653 (diff)
downloadlinux-65e4e3eee83d7a4ad7e8c5175b2a0ddfd3b5685f.tar.xz
block: Introduce BLKGETNRZONES ioctl
Get a zoned block device total number of zones. The device can be a partition of the whole device. The number of zones is always 0 for regular block devices. Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/ioctl.c')
-rw-r--r--block/ioctl.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/block/ioctl.c b/block/ioctl.c
index f6d2c6f1f050..4825c78a6baa 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -534,6 +534,8 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
return blkdev_reset_zones_ioctl(bdev, mode, cmd, arg);
case BLKGETZONESZ:
return put_uint(arg, bdev_zone_sectors(bdev));
+ case BLKGETNRZONES:
+ return put_uint(arg, blkdev_nr_zones(bdev));
case HDIO_GETGEO:
return blkdev_getgeo(bdev, argp);
case BLKRAGET: