Now that device mapper can handle resetting all zones of a mapped zoned
device using REQ_OP_ZONE_RESET_ALL, all zoned block device drivers
support this operation. With this, the request queue feature
BLK_FEAT_ZONE_RESETALL is not necessary and the emulation code in
blk-zone.c can be removed.
Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
block/blk-core.c | 5 +--
block/blk-zoned.c | 76 ++--------------------------------
drivers/block/null_blk/zoned.c | 2 +-
drivers/block/ublk_drv.c | 2 +-
drivers/block/virtio_blk.c | 2 +-
drivers/nvme/host/zns.c | 2 +-
drivers/scsi/sd_zbc.c | 2 +-
include/linux/blkdev.h | 5 ---
8 files changed, 9 insertions(+), 87 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 71b7622c523a..02bceeb36f2c 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -830,11 +830,8 @@ void submit_bio_noacct(struct bio *bio)
case REQ_OP_ZONE_OPEN:
case REQ_OP_ZONE_CLOSE:
case REQ_OP_ZONE_FINISH:
- if (!bdev_is_zoned(bio->bi_bdev))
- goto not_supported;
- break;
case REQ_OP_ZONE_RESET_ALL:
- if (!bdev_is_zoned(bio->bi_bdev) || !blk_queue_zone_resetall(q))
+ if (!bdev_is_zoned(bio->bi_bdev))
goto not_supported;
break;
case REQ_OP_DRV_IN:
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 07831fb67201..b104f5175783 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -157,70 +157,6 @@ static inline unsigned long *blk_alloc_zone_bitmap(int node,
GFP_NOIO, node);
}
-static int blk_zone_need_reset_cb(struct blk_zone *zone, unsigned int idx,
- void *data)
-{
- /*
- * For an all-zones reset, ignore conventional, empty, read-only
- * and offline zones.
- */
- switch (zone->cond) {
- case BLK_ZONE_COND_NOT_WP:
- case BLK_ZONE_COND_EMPTY:
- case BLK_ZONE_COND_READONLY:
- case BLK_ZONE_COND_OFFLINE:
- return 0;
- default:
- set_bit(idx, (unsigned long *)data);
- return 0;
- }
-}
-
-static int blkdev_zone_reset_all_emulated(struct block_device *bdev)
-{
- struct gendisk *disk = bdev->bd_disk;
- sector_t capacity = bdev_nr_sectors(bdev);
- sector_t zone_sectors = bdev_zone_sectors(bdev);
- unsigned long *need_reset;
- struct bio *bio = NULL;
- sector_t sector = 0;
- int ret;
-
- need_reset = blk_alloc_zone_bitmap(disk->queue->node, disk->nr_zones);
- if (!need_reset)
- return -ENOMEM;
-
- ret = disk->fops->report_zones(disk, 0, disk->nr_zones,
- blk_zone_need_reset_cb, need_reset);
- if (ret < 0)
- goto out_free_need_reset;
-
- ret = 0;
- while (sector < capacity) {
- if (!test_bit(disk_zone_no(disk, sector), need_reset)) {
- sector += zone_sectors;
- continue;
- }
-
- bio = blk_next_bio(bio, bdev, 0, REQ_OP_ZONE_RESET | REQ_SYNC,
- GFP_KERNEL);
- bio->bi_iter.bi_sector = sector;
- sector += zone_sectors;
-
- /* This may take a while, so be nice to others */
- cond_resched();
- }
-
- if (bio) {
- ret = submit_bio_wait(bio);
- bio_put(bio);
- }
-
-out_free_need_reset:
- kfree(need_reset);
- return ret;
-}
-
static int blkdev_zone_reset_all(struct block_device *bdev)
{
struct bio bio;
@@ -247,7 +183,6 @@ static int blkdev_zone_reset_all(struct block_device *bdev)
int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op,
sector_t sector, sector_t nr_sectors)
{
- struct request_queue *q = bdev_get_queue(bdev);
sector_t zone_sectors = bdev_zone_sectors(bdev);
sector_t capacity = bdev_nr_sectors(bdev);
sector_t end_sector = sector + nr_sectors;
@@ -275,16 +210,11 @@ int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op,
return -EINVAL;
/*
- * In the case of a zone reset operation over all zones,
- * REQ_OP_ZONE_RESET_ALL can be used with devices supporting this
- * command. For other devices, we emulate this command behavior by
- * identifying the zones needing a reset.
+ * In the case of a zone reset operation over all zones, use
+ * REQ_OP_ZONE_RESET_ALL.
*/
- if (op == REQ_OP_ZONE_RESET && sector == 0 && nr_sectors == capacity) {
- if (!blk_queue_zone_resetall(q))
- return blkdev_zone_reset_all_emulated(bdev);
+ if (op == REQ_OP_ZONE_RESET && sector == 0 && nr_sectors == capacity)
return blkdev_zone_reset_all(bdev);
- }
while (sector < end_sector) {
bio = blk_next_bio(bio, bdev, 0, op | REQ_SYNC, GFP_KERNEL);
diff --git a/drivers/block/null_blk/zoned.c b/drivers/block/null_blk/zoned.c
index 7996e2e7dce2..9bc768b2ca56 100644
--- a/drivers/block/null_blk/zoned.c
+++ b/drivers/block/null_blk/zoned.c
@@ -164,7 +164,7 @@ int null_init_zoned_dev(struct nullb_device *dev,
sector += dev->zone_size_sects;
}
- lim->features |= BLK_FEAT_ZONED | BLK_FEAT_ZONE_RESETALL;
+ lim->features |= BLK_FEAT_ZONED;
lim->chunk_sectors = dev->zone_size_sects;
lim->max_zone_append_sectors = dev->zone_append_max_sectors;
lim->max_open_zones = dev->zone_max_open;
diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 4fdff13fc23b..d10a2ea07292 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -2194,7 +2194,7 @@ static int ublk_ctrl_start_dev(struct ublk_device *ub, struct io_uring_cmd *cmd)
if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED))
return -EOPNOTSUPP;
- lim.features |= BLK_FEAT_ZONED | BLK_FEAT_ZONE_RESETALL;
+ lim.features |= BLK_FEAT_ZONED;
lim.max_active_zones = p->max_active_zones;
lim.max_open_zones = p->max_open_zones;
lim.max_zone_append_sectors = p->max_zone_append_sectors;
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 6c64a67ab9c9..84c3efd0c611 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -728,7 +728,7 @@ static int virtblk_read_zoned_limits(struct virtio_blk *vblk,
dev_dbg(&vdev->dev, "probing host-managed zoned device\n");
- lim->features |= BLK_FEAT_ZONED | BLK_FEAT_ZONE_RESETALL;
+ lim->features |= BLK_FEAT_ZONED;
virtio_cread(vdev, struct virtio_blk_config,
zoned.max_open_zones, &v);
diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c
index 99bb89c2495a..9a06f9d98cd6 100644
--- a/drivers/nvme/host/zns.c
+++ b/drivers/nvme/host/zns.c
@@ -108,7 +108,7 @@ int nvme_query_zone_info(struct nvme_ns *ns, unsigned lbaf,
void nvme_update_zone_info(struct nvme_ns *ns, struct queue_limits *lim,
struct nvme_zone_info *zi)
{
- lim->features |= BLK_FEAT_ZONED | BLK_FEAT_ZONE_RESETALL;
+ lim->features |= BLK_FEAT_ZONED;
lim->max_open_zones = zi->max_open_zones;
lim->max_active_zones = zi->max_active_zones;
lim->max_zone_append_sectors = ns->ctrl->max_zone_append;
diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c
index f7067afac79c..c8b9654d30f0 100644
--- a/drivers/scsi/sd_zbc.c
+++ b/drivers/scsi/sd_zbc.c
@@ -599,7 +599,7 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, struct queue_limits *lim,
if (sdkp->device->type != TYPE_ZBC)
return 0;
- lim->features |= BLK_FEAT_ZONED | BLK_FEAT_ZONE_RESETALL;
+ lim->features |= BLK_FEAT_ZONED;
/*
* Per ZBC and ZAC specifications, writes in sequential write required
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4d0d4b83bc74..dc250d8070d2 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -318,9 +318,6 @@ typedef unsigned int __bitwise blk_features_t;
/* is a zoned device */
#define BLK_FEAT_ZONED ((__force blk_features_t)(1u << 10))
-/* supports Zone Reset All */
-#define BLK_FEAT_ZONE_RESETALL ((__force blk_features_t)(1u << 11))
-
/* supports PCI(e) p2p requests */
#define BLK_FEAT_PCI_P2PDMA ((__force blk_features_t)(1u << 12))
@@ -618,8 +615,6 @@ void blk_queue_flag_clear(unsigned int flag, struct request_queue *q);
test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags)
#define blk_queue_nonrot(q) (!((q)->limits.features & BLK_FEAT_ROTATIONAL))
#define blk_queue_io_stat(q) ((q)->limits.features & BLK_FEAT_IO_STAT)
-#define blk_queue_zone_resetall(q) \
- ((q)->limits.features & BLK_FEAT_ZONE_RESETALL)
#define blk_queue_dax(q) ((q)->limits.features & BLK_FEAT_DAX)
#define blk_queue_pci_p2pdma(q) ((q)->limits.features & BLK_FEAT_PCI_P2PDMA)
#ifdef CONFIG_BLK_RQ_ALLOC_TIME
--
2.45.2
