block: add zone open, close and finish operations
Zoned block devices (ZBC and ZAC devices) allow an explicit control
over the condition (state) of zones. The operations allowed are:
* Open a zone: Transition to open condition to indicate that a zone will
actively be written
* Close a zone: Transition to closed condition to release the drive
resources used for writing to a zone
* Finish a zone: Transition an open or closed zone to the full
condition to prevent write operations
To enable this control for in-kernel zoned block device users, define
the new request operations REQ_OP_ZONE_OPEN, REQ_OP_ZONE_CLOSE
and REQ_OP_ZONE_FINISH as well as the generic function
blkdev_zone_mgmt() for submitting these operations on a range of zones.
This results in blkdev_reset_zones() removal and replacement with this
new zone magement function. Users of blkdev_reset_zones() (f2fs and
dm-zoned) are updated accordingly.
Contains contributions from Matias Bjorling, Hans Holmberg,
Dmitry Fomichev, Keith Busch, Damien Le Moal and Christoph Hellwig.
Reviewed-by: Javier González <javier@javigon.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ajay Joshi <ajay.joshi@wdc.com>
Signed-off-by: Matias Bjorling <matias.bjorling@wdc.com>
Signed-off-by: Hans Holmberg <hans.holmberg@wdc.com>
Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 1478501..dab34dc 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -221,23 +221,27 @@ static inline bool blkdev_allow_reset_all_zones(struct block_device *bdev,
}
/**
- * blkdev_reset_zones - Reset zones write pointer
+ * blkdev_zone_mgmt - Execute a zone management operation on a range of zones
* @bdev: Target block device
- * @sector: Start sector of the first zone to reset
- * @nr_sectors: Number of sectors, at least the length of one zone
+ * @op: Operation to be performed on the zones
+ * @sector: Start sector of the first zone to operate on
+ * @nr_sectors: Number of sectors, should be at least the length of one zone and
+ * must be zone size aligned.
* @gfp_mask: Memory allocation flags (for bio_alloc)
*
* Description:
- * Reset the write pointer of the zones contained in the range
+ * Perform the specified operation on the range of zones specified by
* @sector..@sector+@nr_sectors. Specifying the entire disk sector range
* is valid, but the specified range should not contain conventional zones.
+ * The operation to execute on each zone can be a zone reset, open, close
+ * or finish request.
*/
-int blkdev_reset_zones(struct block_device *bdev,
- sector_t sector, sector_t nr_sectors,
- gfp_t gfp_mask)
+int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op,
+ sector_t sector, sector_t nr_sectors,
+ gfp_t gfp_mask)
{
struct request_queue *q = bdev_get_queue(bdev);
- sector_t zone_sectors;
+ sector_t zone_sectors = blk_queue_zone_sectors(q);
sector_t end_sector = sector + nr_sectors;
struct bio *bio = NULL;
int ret;
@@ -248,12 +252,14 @@ int blkdev_reset_zones(struct block_device *bdev,
if (bdev_read_only(bdev))
return -EPERM;
+ if (!op_is_zone_mgmt(op))
+ return -EOPNOTSUPP;
+
if (!nr_sectors || end_sector > bdev->bd_part->nr_sects)
/* Out of range */
return -EINVAL;
/* Check alignment (handle eventual smaller last zone) */
- zone_sectors = blk_queue_zone_sectors(q);
if (sector & (zone_sectors - 1))
return -EINVAL;
@@ -269,12 +275,13 @@ int blkdev_reset_zones(struct block_device *bdev,
* Special case for the zone reset operation that reset all
* zones, this is useful for applications like mkfs.
*/
- if (blkdev_allow_reset_all_zones(bdev, sector, nr_sectors)) {
+ if (op == REQ_OP_ZONE_RESET &&
+ blkdev_allow_reset_all_zones(bdev, sector, nr_sectors)) {
bio->bi_opf = REQ_OP_ZONE_RESET_ALL;
break;
}
- bio->bi_opf = REQ_OP_ZONE_RESET;
+ bio->bi_opf = op;
bio->bi_iter.bi_sector = sector;
sector += zone_sectors;
@@ -287,7 +294,7 @@ int blkdev_reset_zones(struct block_device *bdev,
return ret;
}
-EXPORT_SYMBOL_GPL(blkdev_reset_zones);
+EXPORT_SYMBOL_GPL(blkdev_zone_mgmt);
/*
* BLKREPORTZONE ioctl processing.
@@ -379,8 +386,8 @@ int blkdev_reset_zones_ioctl(struct block_device *bdev, fmode_t mode,
if (copy_from_user(&zrange, argp, sizeof(struct blk_zone_range)))
return -EFAULT;
- return blkdev_reset_zones(bdev, zrange.sector, zrange.nr_sectors,
- GFP_KERNEL);
+ return blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET,
+ zrange.sector, zrange.nr_sectors, GFP_KERNEL);
}
static inline unsigned long *blk_alloc_zone_bitmap(int node,