block: replace blkdev_nr_zones with bdev_nr_zones

Pass a block_device instead of a request_queue as that is what most
callers have at hand.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Link: https://lore.kernel.org/r/20220706070350.1703384-12-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-zoned.c

@@ -108,21 +108,22 @@ void __blk_req_zone_write_unlock(struct request *rq)
 EXPORT_SYMBOL_GPL(__blk_req_zone_write_unlock);
 
 /**
- * blkdev_nr_zones - Get number of zones
- * @disk:	Target gendisk
+ * bdev_nr_zones - Get number of zones
+ * @bdev:	Target device
  *
  * Return the total number of zones of a zoned block device.  For a block
  * device without zone capabilities, the number of zones is always 0.
  */
-unsigned int blkdev_nr_zones(struct gendisk *disk)
+unsigned int bdev_nr_zones(struct block_device *bdev)
 {
-	sector_t zone_sectors = blk_queue_zone_sectors(disk->queue);
+	sector_t zone_sectors = bdev_zone_sectors(bdev);
 
-	if (!blk_queue_is_zoned(disk->queue))
+	if (!bdev_is_zoned(bdev))
 		return 0;
-	return (get_capacity(disk) + zone_sectors - 1) >> ilog2(zone_sectors);
+	return (bdev_nr_sectors(bdev) + zone_sectors - 1) >>
+		ilog2(zone_sectors);
 }
-EXPORT_SYMBOL_GPL(blkdev_nr_zones);
+EXPORT_SYMBOL_GPL(bdev_nr_zones);
 
 /**
  * blkdev_report_zones - Get zones information

block/ioctl.c

@@ -495,7 +495,7 @@ static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
 	case BLKGETZONESZ:
 		return put_uint(argp, bdev_zone_sectors(bdev));
 	case BLKGETNRZONES:
-		return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
+		return put_uint(argp, bdev_nr_zones(bdev));
 	case BLKROGET:
 		return put_int(argp, bdev_read_only(bdev) != 0);
 	case BLKSSZGET: /* get block device logical block size */

drivers/block/null_blk/zoned.c

@@ -170,7 +170,7 @@ int null_register_zoned_dev(struct nullb *nullb)
 			return ret;
 	} else {
 		blk_queue_chunk_sectors(q, dev->zone_size_sects);
-		q->nr_zones = blkdev_nr_zones(nullb->disk);
+		q->nr_zones = bdev_nr_zones(nullb->disk->part0);
 	}
 
 	blk_queue_max_zone_append_sectors(q, dev->zone_size_sects);

drivers/md/dm-zone.c

@@ -301,7 +301,7 @@ int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q)
 	 * correct value to be exposed in sysfs queue/nr_zones.
 	 */
 	WARN_ON_ONCE(queue_is_mq(q));
-	q->nr_zones = blkdev_nr_zones(md->disk);
+	q->nr_zones = bdev_nr_zones(md->disk->part0);
 
 	/* Check if zone append is natively supported */
 	if (dm_table_supports_zone_append(t)) {

drivers/md/dm-zoned-target.c

@@ -793,8 +793,7 @@ static int dmz_fixup_devices(struct dm_target *ti)
 			}
 			zone_nr_sectors = blk_queue_zone_sectors(q);
 			zoned_dev->zone_nr_sectors = zone_nr_sectors;
-			zoned_dev->nr_zones =
-				blkdev_nr_zones(zoned_dev->bdev->bd_disk);
+			zoned_dev->nr_zones = bdev_nr_zones(zoned_dev->bdev);
 		}
 	} else {
 		reg_dev = NULL;
@@ -805,7 +804,7 @@ static int dmz_fixup_devices(struct dm_target *ti)
 		}
 		q = bdev_get_queue(zoned_dev->bdev);
 		zoned_dev->zone_nr_sectors = blk_queue_zone_sectors(q);
-		zoned_dev->nr_zones = blkdev_nr_zones(zoned_dev->bdev->bd_disk);
+		zoned_dev->nr_zones = bdev_nr_zones(zoned_dev->bdev);
 	}
 
 	if (reg_dev) {

drivers/nvme/target/zns.c

@@ -60,7 +60,7 @@ bool nvmet_bdev_zns_enable(struct nvmet_ns *ns)
 	if (ns->bdev->bd_disk->queue->conv_zones_bitmap)
 		return false;
 
-	ret = blkdev_report_zones(ns->bdev, 0, blkdev_nr_zones(bd_disk),
+	ret = blkdev_report_zones(ns->bdev, 0, bdev_nr_zones(ns->bdev),
 				  validate_conv_zones_cb, NULL);
 	if (ret < 0)
 		return false;
@@ -241,7 +241,7 @@ static unsigned long nvmet_req_nr_zones_from_slba(struct nvmet_req *req)
 {
 	unsigned int sect = nvmet_lba_to_sect(req->ns, req->cmd->zmr.slba);
 
-	return blkdev_nr_zones(req->ns->bdev->bd_disk) -
+	return bdev_nr_zones(req->ns->bdev) -
 		(sect >> ilog2(bdev_zone_sectors(req->ns->bdev)));
 }
 
@@ -386,7 +386,7 @@ static int zmgmt_send_scan_cb(struct blk_zone *z, unsigned i, void *d)
 static u16 nvmet_bdev_zone_mgmt_emulate_all(struct nvmet_req *req)
 {
 	struct block_device *bdev = req->ns->bdev;
-	unsigned int nr_zones = blkdev_nr_zones(bdev->bd_disk);
+	unsigned int nr_zones = bdev_nr_zones(bdev);
 	struct request_queue *q = bdev_get_queue(bdev);
 	struct bio *bio = NULL;
 	sector_t sector = 0;

fs/zonefs/super.c

@@ -1394,7 +1394,7 @@ static void zonefs_init_dir_inode(struct inode *parent, struct inode *inode,
 {
 	struct super_block *sb = parent->i_sb;
 
-	inode->i_ino = blkdev_nr_zones(sb->s_bdev->bd_disk) + type + 1;
+	inode->i_ino = bdev_nr_zones(sb->s_bdev) + type + 1;
 	inode_init_owner(&init_user_ns, inode, parent, S_IFDIR | 0555);
 	inode->i_op = &zonefs_dir_inode_operations;
 	inode->i_fop = &simple_dir_operations;
@@ -1540,7 +1540,7 @@ static int zonefs_create_zgroup(struct zonefs_zone_data *zd,
 	/*
 	 * The first zone contains the super block: skip it.
 	 */
-	end = zd->zones + blkdev_nr_zones(sb->s_bdev->bd_disk);
+	end = zd->zones + bdev_nr_zones(sb->s_bdev);
 	for (zone = &zd->zones[1]; zone < end; zone = next) {
 
 		next = zone + 1;
@@ -1635,8 +1635,8 @@ static int zonefs_get_zone_info(struct zonefs_zone_data *zd)
 	struct block_device *bdev = zd->sb->s_bdev;
 	int ret;
 
-	zd->zones = kvcalloc(blkdev_nr_zones(bdev->bd_disk),
-			     sizeof(struct blk_zone), GFP_KERNEL);
+	zd->zones = kvcalloc(bdev_nr_zones(bdev), sizeof(struct blk_zone),
+			     GFP_KERNEL);
 	if (!zd->zones)
 		return -ENOMEM;
 
@@ -1648,9 +1648,9 @@ static int zonefs_get_zone_info(struct zonefs_zone_data *zd)
 		return ret;
 	}
 
-	if (ret != blkdev_nr_zones(bdev->bd_disk)) {
+	if (ret != bdev_nr_zones(bdev)) {
 		zonefs_err(zd->sb, "Invalid zone report (%d/%u zones)\n",
-			   ret, blkdev_nr_zones(bdev->bd_disk));
+			   ret, bdev_nr_zones(bdev));
 		return -EIO;
 	}
 
@@ -1816,8 +1816,7 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
 	if (ret)
 		goto cleanup;
 
-	zonefs_info(sb, "Mounting %u zones",
-		    blkdev_nr_zones(sb->s_bdev->bd_disk));
+	zonefs_info(sb, "Mounting %u zones", bdev_nr_zones(sb->s_bdev));
 
 	if (!sbi->s_max_wro_seq_files &&
 	    !sbi->s_max_active_seq_files &&
@@ -1833,7 +1832,7 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
 	if (!inode)
 		goto cleanup;
 
-	inode->i_ino = blkdev_nr_zones(sb->s_bdev->bd_disk);
+	inode->i_ino = bdev_nr_zones(sb->s_bdev);
 	inode->i_mode = S_IFDIR | 0555;
 	inode->i_ctime = inode->i_mtime = inode->i_atime = current_time(inode);
 	inode->i_op = &zonefs_dir_inode_operations;

include/linux/blkdev.h

@@ -298,7 +298,7 @@ void disk_set_zoned(struct gendisk *disk, enum blk_zoned_model model);
 #define BLK_ALL_ZONES  ((unsigned int)-1)
 int blkdev_report_zones(struct block_device *bdev, sector_t sector,
 			unsigned int nr_zones, report_zones_cb cb, void *data);
-unsigned int blkdev_nr_zones(struct gendisk *disk);
+unsigned int bdev_nr_zones(struct block_device *bdev);
 extern int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op,
 			    sector_t sectors, sector_t nr_sectors,
 			    gfp_t gfp_mask);
@@ -312,7 +312,7 @@ extern int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
 
 #else /* CONFIG_BLK_DEV_ZONED */
 
-static inline unsigned int blkdev_nr_zones(struct gendisk *disk)
+static inline unsigned int bdev_nr_zones(struct block_device *bdev)
 {
 	return 0;
 }