[PATCH v7 20/28] block: Simplify blk_revalidate_disk_zones() interface

Damien Le Moal
2024-04-08T01:42:08Z

The only user of blk_revalidate_disk_zones() second argument was the
SCSI disk driver (sd). Now that this driver does not require this
update_driver_data argument, remove it to simplify the interface of
blk_revalidate_disk_zones(). Also update the function kdoc comment to
be more accurate (i.e. there is no gendisk ->revalidate method).

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Hans Holmberg <hans.holmberg@wdc.com>
Tested-by: Dennis Maisenbacher <dennis.maisenbacher@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
---
block/blk-zoned.c | 21 +++++++--------------
drivers/block/null_blk/zoned.c | 2 +-
drivers/block/ublk_drv.c | 2 +-
drivers/block/virtio_blk.c | 2 +-
drivers/md/dm-zone.c | 2 +-
drivers/nvme/host/core.c | 2 +-
drivers/scsi/sd_zbc.c | 2 +-
include/linux/blkdev.h | 3 +--
8 files changed, 14 insertions(+), 22 deletions(-)

diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index da0fc7e2d00a..e46d23ad2fa9 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -1713,21 +1713,17 @@ static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx,
/**
* blk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps
* @disk: Target disk
- * @update_driver_data: Callback to update driver data on the frozen disk
*
- * Helper function for low-level device drivers to check and (re) allocate and
- * initialize a disk request queue zone bitmaps. This functions should normally
- * be called within the disk ->revalidate method for blk-mq based drivers.
+ * Helper function for low-level device drivers to check, (re) allocate and
+ * initialize resources used for managing zoned disks. This function should
+ * normally be called by blk-mq based drivers when a zoned gendisk is probed
+ * and when the zone configuration of the gendisk changes (e.g. after a format).
* Before calling this function, the device driver must already have set the
* device zone size (chunk_sector limit) and the max zone append limit.
* BIO based drivers can also use this function as long as the device queue
* can be safely frozen.
- * If the @update_driver_data callback function is not NULL, the callback is
- * executed with the device request queue frozen after all zones have been
- * checked.
*/
-int blk_revalidate_disk_zones(struct gendisk *disk,
- void (*update_driver_data)(struct gendisk *disk))
+int blk_revalidate_disk_zones(struct gendisk *disk)
{
struct request_queue *q = disk->queue;
sector_t zone_sectors = q->limits.chunk_sectors;
@@ -1794,13 +1790,10 @@ int blk_revalidate_disk_zones(struct gendisk *disk,
* referencing the bitmaps).
*/
blk_mq_freeze_queue(q);
- if (ret > 0) {
+ if (ret > 0)
ret = disk_update_zone_resources(disk, &args);
- if (update_driver_data)
- update_driver_data(disk);
- } else {
+ else
pr_warn("%s: failed to revalidate zones\n", disk->disk_name);
- }
if (ret)
disk_free_zone_resources(disk);
blk_mq_unfreeze_queue(q);
diff --git a/drivers/block/null_blk/zoned.c b/drivers/block/null_blk/zoned.c
index 0b2af273adaf..4ddd84752557 100644
--- a/drivers/block/null_blk/zoned.c
+++ b/drivers/block/null_blk/zoned.c
@@ -177,7 +177,7 @@ int null_register_zoned_dev(struct nullb *nullb)
disk->disk_name,
queue_emulates_zone_append(q) ? "emulated" : "native");

- return blk_revalidate_disk_zones(disk, NULL);
+ return blk_revalidate_disk_zones(disk);
}

void null_free_zoned_dev(struct nullb_device *dev)
diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index ab6af84e327c..851c78913de2 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -221,7 +221,7 @@ static int ublk_get_nr_zones(const struct ublk_device *ub)

static int ublk_revalidate_disk_zones(struct ublk_device *ub)
{
- return blk_revalidate_disk_zones(ub->ub_disk, NULL);
+ return blk_revalidate_disk_zones(ub->ub_disk);
}

static int ublk_dev_param_zoned_validate(const struct ublk_device *ub)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 42dea7601d87..c1af0a7d56c8 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -1543,7 +1543,7 @@ static int virtblk_probe(struct virtio_device *vdev)
*/
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) && lim.zoned) {
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, vblk->disk->queue);
- err = blk_revalidate_disk_zones(vblk->disk, NULL);
+ err = blk_revalidate_disk_zones(vblk->disk);
if (err)
goto out_cleanup_disk;
}
diff --git a/drivers/md/dm-zone.c b/drivers/md/dm-zone.c
index 34769f3e3175..d17ae4486a6a 100644
--- a/drivers/md/dm-zone.c
+++ b/drivers/md/dm-zone.c
@@ -169,7 +169,7 @@ static int dm_revalidate_zones(struct mapped_device *md, struct dm_table *t)
* our table for dm_blk_report_zones() to use directly.
*/
md->zone_revalidate_map = t;
- ret = blk_revalidate_disk_zones(disk, NULL);
+ ret = blk_revalidate_disk_zones(disk);
md->zone_revalidate_map = NULL;

if (ret) {
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 27281a9a8951..8ae0a2dc5eda 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2153,7 +2153,7 @@ static int nvme_update_ns_info_block(struct nvme_ns *ns,
blk_mq_unfreeze_queue(ns->disk->queue);

if (blk_queue_is_zoned(ns->queue)) {
- ret = blk_revalidate_disk_zones(ns->disk, NULL);
+ ret = blk_revalidate_disk_zones(ns->disk);
if (ret && !nvme_first_scan(ns->disk))
goto out;
}
diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c
index d0ead9858954..806036e48abe 100644
--- a/drivers/scsi/sd_zbc.c
+++ b/drivers/scsi/sd_zbc.c
@@ -572,7 +572,7 @@ int sd_zbc_revalidate_zones(struct scsi_disk *sdkp)
blk_queue_max_zone_append_sectors(q, 0);

flags = memalloc_noio_save();
- ret = blk_revalidate_disk_zones(disk, NULL);
+ ret = blk_revalidate_disk_zones(disk);
memalloc_noio_restore(flags);
if (ret) {
sdkp->zone_info = (struct zoned_disk_info){ };
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0b69027e1713..359e2b7d27fa 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -336,8 +336,7 @@ int blkdev_report_zones(struct block_device *bdev, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data);
int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op,
sector_t sectors, sector_t nr_sectors);
-int blk_revalidate_disk_zones(struct gendisk *disk,
- void (*update_driver_data)(struct gendisk *disk));
+int blk_revalidate_disk_zones(struct gendisk *disk);

/*
* Independent access ranges: struct blk_independent_access_range describes
--
2.44.0