[PATCH v4 06/11] block: Introduce BLKGETZONESZ ioctl
From: Damien Le Moal <hidden>
Date: 2018-10-12 10:08:45
Also in:
dm-devel, linux-scsi
Subsystem:
block layer, the rest, zoned block device (block layer) · Maintainers:
Jens Axboe, Linus Torvalds, Damien Le Moal
Get a zoned block device zone size in number of 512 B sectors. The zone size is always 0 for regular block devices. Signed-off-by: Damien Le Moal <redacted> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> --- block/ioctl.c | 2 ++ include/uapi/linux/blkzoned.h | 2 ++ 2 files changed, 4 insertions(+)
diff --git a/block/ioctl.c b/block/ioctl.c
index 3884d810efd2..f6d2c6f1f050 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c@@ -532,6 +532,8 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, return blkdev_report_zones_ioctl(bdev, mode, cmd, arg); case BLKRESETZONE: return blkdev_reset_zones_ioctl(bdev, mode, cmd, arg); + case BLKGETZONESZ: + return put_uint(arg, bdev_zone_sectors(bdev)); case HDIO_GETGEO: return blkdev_getgeo(bdev, argp); case BLKRAGET:
diff --git a/include/uapi/linux/blkzoned.h b/include/uapi/linux/blkzoned.h
index ff5a5db8906a..281ac605f752 100644
--- a/include/uapi/linux/blkzoned.h
+++ b/include/uapi/linux/blkzoned.h@@ -137,8 +137,10 @@ struct blk_zone_range { * sector specified in the report request structure. * @BLKRESETZONE: Reset the write pointer of the zones in the specified * sector range. The sector range must be zone aligned. + * @BLKGETZONESZ: Get the device zone size in number of 512 B sectors. */ #define BLKREPORTZONE _IOWR(0x12, 130, struct blk_zone_report) #define BLKRESETZONE _IOW(0x12, 131, struct blk_zone_range) +#define BLKGETZONESZ _IOW(0x12, 132, __u32) #endif /* _UAPI_BLKZONED_H */
--
2.17.1