6 files changed, 618 insertions, 54 deletions

diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h
index cfabc1c91f9f..edc1553c4eea 100644
--- a/drivers/md/dm-core.h
+++ b/drivers/md/dm-core.h
@@ -114,6 +114,11 @@ struct mapped_device {
 	bool init_tio_pdu:1;
 
 	struct srcu_struct io_barrier;
+
+#ifdef CONFIG_BLK_DEV_ZONED
+	unsigned int nr_zones;
+	unsigned int *zwp_offset;
+#endif
 };
 
 /*
@@ -128,6 +133,7 @@ struct mapped_device {
 #define DMF_DEFERRED_REMOVE 6
 #define DMF_SUSPENDED_INTERNALLY 7
 #define DMF_POST_SUSPENDING 8
+#define DMF_EMULATE_ZONE_APPEND 9
 
 void disable_discard(struct mapped_device *md);
 void disable_write_same(struct mapped_device *md);
@@ -143,6 +149,13 @@ static inline struct dm_stats *dm_get_stats(struct mapped_device *md)
 	return &md->stats;
 }
 
+static inline bool dm_emulate_zone_append(struct mapped_device *md)
+{
+	if (blk_queue_is_zoned(md->queue))
+		return test_bit(DMF_EMULATE_ZONE_APPEND, &md->flags);
+	return false;
+}
+
 #define DM_TABLE_MAX_DEPTH 16
 
 struct dm_table {
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 1134ceed800f..0543cdf89e92 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1981,11 +1981,12 @@ static int device_requires_stable_pages(struct dm_target *ti,
 	return blk_queue_stable_writes(q);
 }
 
-void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
-			       struct queue_limits *limits)
+int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
+			      struct queue_limits *limits)
 {
 	bool wc = false, fua = false;
 	int page_size = PAGE_SIZE;
+	int r;
 
 	/*
 	 * Copy table's limits to the DM device's request_queue
@@ -2064,12 +2065,20 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
 	    dm_table_any_dev_attr(t, device_is_not_random, NULL))
 		blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
 
-	/* For a zoned target, setup the zones related queue attributes */
-	if (blk_queue_is_zoned(q))
-		dm_set_zones_restrictions(t, q);
+	/*
+	 * For a zoned target, setup the zones related queue attributes
+	 * and resources necessary for zone append emulation if necessary.
+	 */
+	if (blk_queue_is_zoned(q)) {
+		r = dm_set_zones_restrictions(t, q);
+		if (r)
+			return r;
+	}
 
 	dm_update_keyslot_manager(q, t);
 	blk_queue_update_readahead(q);
+
+	return 0;
 }
 
 unsigned int dm_table_get_num_targets(struct dm_table *t)
diff --git a/drivers/md/dm-zone.c b/drivers/md/dm-zone.c
index edc3bbb45637..c2f26949f5ee 100644
--- a/drivers/md/dm-zone.c
+++ b/drivers/md/dm-zone.c
@@ -4,55 +4,72 @@
  */
 
 #include <linux/blkdev.h>
+#include <linux/mm.h>
+#include <linux/sched/mm.h>
+#include <linux/slab.h>
 
 #include "dm-core.h"
 
+#define DM_MSG_PREFIX "zone"
+
+#define DM_ZONE_INVALID_WP_OFST		UINT_MAX
+
 /*
- * User facing dm device block device report zone operation. This calls the
- * report_zones operation for each target of a device table. This operation is
- * generally implemented by targets using dm_report_zones().
+ * For internal zone reports bypassing the top BIO submission path.
  */
-int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
-			unsigned int nr_zones, report_zones_cb cb, void *data)
+static int dm_blk_do_report_zones(struct mapped_device *md, struct dm_table *t,
+				  sector_t sector, unsigned int nr_zones,
+				  report_zones_cb cb, void *data)
 {
-	struct mapped_device *md = disk->private_data;
-	struct dm_table *map;
-	int srcu_idx, ret;
+	struct gendisk *disk = md->disk;
+	int ret;
 	struct dm_report_zones_args args = {
 		.next_sector = sector,
 		.orig_data = data,
 		.orig_cb = cb,
 	};
 
-	if (dm_suspended_md(md))
-		return -EAGAIN;
-
-	map = dm_get_live_table(md, &srcu_idx);
-	if (!map) {
-		ret = -EIO;
-		goto out;
-	}
-
 	do {
 		struct dm_target *tgt;
 
-		tgt = dm_table_find_target(map, args.next_sector);
-		if (WARN_ON_ONCE(!tgt->type->report_zones)) {
-			ret = -EIO;
-			goto out;
-		}
+		tgt = dm_table_find_target(t, args.next_sector);
+		if (WARN_ON_ONCE(!tgt->type->report_zones))
+			return -EIO;
 
 		args.tgt = tgt;
 		ret = tgt->type->report_zones(tgt, &args,
 					      nr_zones - args.zone_idx);
 		if (ret < 0)
-			goto out;
+			return ret;
 	} while (args.zone_idx < nr_zones &&
 		 args.next_sector < get_capacity(disk));
 
-	ret = args.zone_idx;
-out:
+	return args.zone_idx;
+}
+
+/*
+ * User facing dm device block device report zone operation. This calls the
+ * report_zones operation for each target of a device table. This operation is
+ * generally implemented by targets using dm_report_zones().
+ */
+int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
+			unsigned int nr_zones, report_zones_cb cb, void *data)
+{
+	struct mapped_device *md = disk->private_data;
+	struct dm_table *map;
+	int srcu_idx, ret;
+
+	if (dm_suspended_md(md))
+		return -EAGAIN;
+
+	map = dm_get_live_table(md, &srcu_idx);
+	if (!map)
+		return -EIO;
+
+	ret = dm_blk_do_report_zones(md, map, sector, nr_zones, cb, data);
+
 	dm_put_live_table(md, srcu_idx);
+
 	return ret;
 }
 
@@ -121,16 +138,517 @@ bool dm_is_zone_write(struct mapped_device *md, struct bio *bio)
 	}
 }
 
-void dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q)
+void dm_cleanup_zoned_dev(struct mapped_device *md)
 {
-	if (!blk_queue_is_zoned(q))
-		return;
+	struct request_queue *q = md->queue;
+
+	if (q) {
+		kfree(q->conv_zones_bitmap);
+		q->conv_zones_bitmap = NULL;
+		kfree(q->seq_zones_wlock);
+		q->seq_zones_wlock = NULL;
+	}
+
+	kvfree(md->zwp_offset);
+	md->zwp_offset = NULL;
+	md->nr_zones = 0;
+}
+
+static unsigned int dm_get_zone_wp_offset(struct blk_zone *zone)
+{
+	switch (zone->cond) {
+	case BLK_ZONE_COND_IMP_OPEN:
+	case BLK_ZONE_COND_EXP_OPEN:
+	case BLK_ZONE_COND_CLOSED:
+		return zone->wp - zone->start;
+	case BLK_ZONE_COND_FULL:
+		return zone->len;
+	case BLK_ZONE_COND_EMPTY:
+	case BLK_ZONE_COND_NOT_WP:
+	case BLK_ZONE_COND_OFFLINE:
+	case BLK_ZONE_COND_READONLY:
+	default:
+		/*
+		 * Conventional, offline and read-only zones do not have a valid
+		 * write pointer. Use 0 as for an empty zone.
+		 */
+		return 0;
+	}
+}
+
+static int dm_zone_revalidate_cb(struct blk_zone *zone, unsigned int idx,
+				 void *data)
+{
+	struct mapped_device *md = data;
+	struct request_queue *q = md->queue;
+
+	switch (zone->type) {
+	case BLK_ZONE_TYPE_CONVENTIONAL:
+		if (!q->conv_zones_bitmap) {
+			q->conv_zones_bitmap =
+				kcalloc(BITS_TO_LONGS(q->nr_zones),
+					sizeof(unsigned long), GFP_NOIO);
+			if (!q->conv_zones_bitmap)
+				return -ENOMEM;
+		}
+		set_bit(idx, q->conv_zones_bitmap);
+		break;
+	case BLK_ZONE_TYPE_SEQWRITE_REQ:
+	case BLK_ZONE_TYPE_SEQWRITE_PREF:
+		if (!q->seq_zones_wlock) {
+			q->seq_zones_wlock =
+				kcalloc(BITS_TO_LONGS(q->nr_zones),
+					sizeof(unsigned long), GFP_NOIO);
+			if (!q->seq_zones_wlock)
+				return -ENOMEM;
+		}
+		if (!md->zwp_offset) {
+			md->zwp_offset =
+				kvcalloc(q->nr_zones, sizeof(unsigned int),
+					 GFP_NOIO);
+			if (!md->zwp_offset)
+				return -ENOMEM;
+		}
+		md->zwp_offset[idx] = dm_get_zone_wp_offset(zone);
+
+		break;
+	default:
+		DMERR("Invalid zone type 0x%x at sectors %llu",
+		      (int)zone->type, zone->start);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+/*
+ * Revalidate the zones of a mapped device to initialize resource necessary
+ * for zone append emulation. Note that we cannot simply use the block layer
+ * blk_revalidate_disk_zones() function here as the mapped device is suspended
+ * (this is called from __bind() context).
+ */
+static int dm_revalidate_zones(struct mapped_device *md, struct dm_table *t)
+{
+	struct request_queue *q = md->queue;
+	int ret;
+
+	/*
+	 * Check if something changed. If yes, cleanup the current resources
+	 * and reallocate everything.
+	 */
+	if (!q->nr_zones || q->nr_zones != md->nr_zones)
+		dm_cleanup_zoned_dev(md);
+	if (md->nr_zones)
+		return 0;
+
+	/* Scan all zones to initialize everything */
+	ret = dm_blk_do_report_zones(md, t, 0, q->nr_zones,
+				     dm_zone_revalidate_cb, md);
+	if (ret < 0)
+		goto err;
+	if (ret != q->nr_zones) {
+		ret = -EIO;
+		goto err;
+	}
+
+	md->nr_zones = q->nr_zones;
+
+	return 0;
+
+err:
+	DMERR("Revalidate zones failed %d", ret);
+	dm_cleanup_zoned_dev(md);
+	return ret;
+}
+
+static int device_not_zone_append_capable(struct dm_target *ti,
+					  struct dm_dev *dev, sector_t start,
+					  sector_t len, void *data)
+{
+	return !blk_queue_is_zoned(bdev_get_queue(dev->bdev));
+}
+
+static bool dm_table_supports_zone_append(struct dm_table *t)
+{
+	struct dm_target *ti;
+	unsigned int i;
+
+	for (i = 0; i < dm_table_get_num_targets(t); i++) {
+		ti = dm_table_get_target(t, i);
+
+		if (ti->emulate_zone_append)
+			return false;
+
+		if (!ti->type->iterate_devices ||
+		    ti->type->iterate_devices(ti, device_not_zone_append_capable, NULL))
+			return false;
+	}
+
+	return true;
+}
+
+int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q)
+{
+	struct mapped_device *md = t->md;
 
 	/*
 	 * For a zoned target, the number of zones should be updated for the
-	 * correct value to be exposed in sysfs queue/nr_zones. For a BIO based
-	 * target, this is all that is needed.
+	 * correct value to be exposed in sysfs queue/nr_zones.
 	 */
 	WARN_ON_ONCE(queue_is_mq(q));
-	q->nr_zones = blkdev_nr_zones(t->md->disk);
+	q->nr_zones = blkdev_nr_zones(md->disk);
+
+	/* Check if zone append is natively supported */
+	if (dm_table_supports_zone_append(t)) {
+		clear_bit(DMF_EMULATE_ZONE_APPEND, &md->flags);
+		dm_cleanup_zoned_dev(md);
+		return 0;
+	}
+
+	/*
+	 * Mark the mapped device as needing zone append emulation and
+	 * initialize the emulation resources once the capacity is set.
+	 */
+	set_bit(DMF_EMULATE_ZONE_APPEND, &md->flags);
+	if (!get_capacity(md->disk))
+		return 0;
+
+	return dm_revalidate_zones(md, t);
+}
+
+static int dm_update_zone_wp_offset_cb(struct blk_zone *zone, unsigned int idx,
+				       void *data)
+{
+	unsigned int *wp_offset = data;
+
+	*wp_offset = dm_get_zone_wp_offset(zone);
+
+	return 0;
+}
+
+static int dm_update_zone_wp_offset(struct mapped_device *md, unsigned int zno,
+				    unsigned int *wp_ofst)
+{
+	sector_t sector = zno * blk_queue_zone_sectors(md->queue);
+	unsigned int noio_flag;
+	struct dm_table *t;
+	int srcu_idx, ret;
+
+	t = dm_get_live_table(md, &srcu_idx);
+	if (!t)
+		return -EIO;
+
+	/*
+	 * Ensure that all memory allocations in this context are done as if
+	 * GFP_NOIO was specified.
+	 */
+	noio_flag = memalloc_noio_save();
+	ret = dm_blk_do_report_zones(md, t, sector, 1,
+				     dm_update_zone_wp_offset_cb, wp_ofst);
+	memalloc_noio_restore(noio_flag);
+
+	dm_put_live_table(md, srcu_idx);
+
+	if (ret != 1)
+		return -EIO;
+
+	return 0;
+}
+
+/*
+ * First phase of BIO mapping for targets with zone append emulation:
+ * check all BIO that change a zone writer pointer and change zone
+ * append operations into regular write operations.
+ */
+static bool dm_zone_map_bio_begin(struct mapped_device *md,
+				  struct bio *orig_bio, struct bio *clone)
+{
+	sector_t zsectors = blk_queue_zone_sectors(md->queue);
+	unsigned int zno = bio_zone_no(orig_bio);
+	unsigned int zwp_offset = READ_ONCE(md->zwp_offset[zno]);
+
+	/*
+	 * If the target zone is in an error state, recover by inspecting the
+	 * zone to get its current write pointer position. Note that since the
+	 * target zone is already locked, a BIO issuing context should never
+	 * see the zone write in the DM_ZONE_UPDATING_WP_OFST state.
+	 */
+	if (zwp_offset == DM_ZONE_INVALID_WP_OFST) {
+		if (dm_update_zone_wp_offset(md, zno, &zwp_offset))
+			return false;
+		WRITE_ONCE(md->zwp_offset[zno], zwp_offset);
+	}
+
+	switch (bio_op(orig_bio)) {
+	case REQ_OP_ZONE_RESET:
+	case REQ_OP_ZONE_FINISH:
+		return true;
+	case REQ_OP_WRITE_ZEROES:
+	case REQ_OP_WRITE_SAME:
+	case REQ_OP_WRITE:
+		/* Writes must be aligned to the zone write pointer */
+		if ((clone->bi_iter.bi_sector & (zsectors - 1)) != zwp_offset)
+			return false;
+		break;
+	case REQ_OP_ZONE_APPEND:
+		/*
+		 * Change zone append operations into a non-mergeable regular
+		 * writes directed at the current write pointer position of the
+		 * target zone.
+		 */
+		clone->bi_opf = REQ_OP_WRITE | REQ_NOMERGE |
+			(orig_bio->bi_opf & (~REQ_OP_MASK));
+		clone->bi_iter.bi_sector =
+			orig_bio->bi_iter.bi_sector + zwp_offset;
+		break;
+	default:
+		DMWARN_LIMIT("Invalid BIO operation");
+		return false;
+	}
+
+	/* Cannot write to a full zone */
+	if (zwp_offset >= zsectors)
+		return false;
+
+	return true;
+}
+
+/*
+ * Second phase of BIO mapping for targets with zone append emulation:
+ * update the zone write pointer offset array to account for the additional
+ * data written to a zone. Note that at this point, the remapped clone BIO
+ * may already have completed, so we do not touch it.
+ */
+static blk_status_t dm_zone_map_bio_end(struct mapped_device *md,
+					struct bio *orig_bio,
+					unsigned int nr_sectors)
+{
+	unsigned int zno = bio_zone_no(orig_bio);
+	unsigned int zwp_offset = READ_ONCE(md->zwp_offset[zno]);
+
+	/* The clone BIO may already have been completed and failed */
+	if (zwp_offset == DM_ZONE_INVALID_WP_OFST)
+		return BLK_STS_IOERR;
+
+	/* Update the zone wp offset */
+	switch (bio_op(orig_bio)) {
+	case REQ_OP_ZONE_RESET:
+		WRITE_ONCE(md->zwp_offset[zno], 0);
+		return BLK_STS_OK;
+	case REQ_OP_ZONE_FINISH:
+		WRITE_ONCE(md->zwp_offset[zno],
+			   blk_queue_zone_sectors(md->queue));
+		return BLK_STS_OK;
+	case REQ_OP_WRITE_ZEROES:
+	case REQ_OP_WRITE_SAME:
+	case REQ_OP_WRITE:
+		WRITE_ONCE(md->zwp_offset[zno], zwp_offset + nr_sectors);
+		return BLK_STS_OK;
+	case REQ_OP_ZONE_APPEND:
+		/*
+		 * Check that the target did not truncate the write operation
+		 * emulating a zone append.
+		 */
+		if (nr_sectors != bio_sectors(orig_bio)) {
+			DMWARN_LIMIT("Truncated write for zone append");
+			return BLK_STS_IOERR;
+		}
+		WRITE_ONCE(md->zwp_offset[zno], zwp_offset + nr_sectors);
+		return BLK_STS_OK;
+	default:
+		DMWARN_LIMIT("Invalid BIO operation");
+		return BLK_STS_IOERR;
+	}
+}
+
+static inline void dm_zone_lock(struct request_queue *q,
+				unsigned int zno, struct bio *clone)
+{
+	if (WARN_ON_ONCE(bio_flagged(clone, BIO_ZONE_WRITE_LOCKED)))
+		return;
+
+	wait_on_bit_lock_io(q->seq_zones_wlock, zno, TASK_UNINTERRUPTIBLE);
+	bio_set_flag(clone, BIO_ZONE_WRITE_LOCKED);
+}
+
+static inline void dm_zone_unlock(struct request_queue *q,
+				  unsigned int zno, struct bio *clone)
+{
+	if (!bio_flagged(clone, BIO_ZONE_WRITE_LOCKED))
+		return;
+
+	WARN_ON_ONCE(!test_bit(zno, q->seq_zones_wlock));
+	clear_bit_unlock(zno, q->seq_zones_wlock);
+	smp_mb__after_atomic();
+	wake_up_bit(q->seq_zones_wlock, zno);
+
+	bio_clear_flag(clone, BIO_ZONE_WRITE_LOCKED);
+}
+
+static bool dm_need_zone_wp_tracking(struct bio *orig_bio)
+{
+	/*
+	 * Special processing is not needed for operations that do not need the
+	 * zone write lock, that is, all operations that target conventional
+	 * zones and all operations that do not modify directly a sequential
+	 * zone write pointer.
+	 */
+	if (op_is_flush(orig_bio->bi_opf) && !bio_sectors(orig_bio))
+		return false;
+	switch (bio_op(orig_bio)) {
+	case REQ_OP_WRITE_ZEROES:
+	case REQ_OP_WRITE_SAME:
+	case REQ_OP_WRITE:
+	case REQ_OP_ZONE_RESET:
+	case REQ_OP_ZONE_FINISH:
+	case REQ_OP_ZONE_APPEND:
+		return bio_zone_is_seq(orig_bio);
+	default:
+		return false;
+	}
+}
+
+/*
+ * Special IO mapping for targets needing zone append emulation.
+ */
+int dm_zone_map_bio(struct dm_target_io *tio)
+{
+	struct dm_io *io = tio->io;
+	struct dm_target *ti = tio->ti;
+	struct mapped_device *md = io->md;
+	struct request_queue *q = md->queue;
+	struct bio *orig_bio = io->orig_bio;
+	struct bio *clone = &tio->clone;
+	unsigned int zno;
+	blk_status_t sts;
+	int r;
+
+	/*
+	 * IOs that do not change a zone write pointer do not need
+	 * any additional special processing.
+	 */
+	if (!dm_need_zone_wp_tracking(orig_bio))
+		return ti->type->map(ti, clone);
+
+	/* Lock the target zone */
+	zno = bio_zone_no(orig_bio);
+	dm_zone_lock(q, zno, clone);
+
+	/*
+	 * Check that the bio and the target zone write pointer offset are
+	 * both valid, and if the bio is a zone append, remap it to a write.
+	 */
+	if (!dm_zone_map_bio_begin(md, orig_bio, clone)) {
+		dm_zone_unlock(q, zno, clone);
+		return DM_MAPIO_KILL;
+	}
+
+	/*
+	 * The target map function may issue and complete the IO quickly.
+	 * Take an extra reference on the IO to make sure it does disappear
+	 * until we run dm_zone_map_bio_end().
+	 */
+	dm_io_inc_pending(io);
+
+	/* Let the target do its work */
+	r = ti->type->map(ti, clone);
+	switch (r) {
+	case DM_MAPIO_SUBMITTED:
+		/*
+		 * The target submitted the clone BIO. The target zone will
+		 * be unlocked on completion of the clone.
+		 */
+		sts = dm_zone_map_bio_end(md, orig_bio, *tio->len_ptr);
+		break;
+	case DM_MAPIO_REMAPPED:
+		/*
+		 * The target only remapped the clone BIO. In case of error,
+		 * unlock the target zone here as the clone will not be
+		 * submitted.
+		 */
+		sts = dm_zone_map_bio_end(md, orig_bio, *tio->len_ptr);
+		if (sts != BLK_STS_OK)
+			dm_zone_unlock(q, zno, clone);
+		break;
+	case DM_MAPIO_REQUEUE:
+	case DM_MAPIO_KILL:
+	default:
+		dm_zone_unlock(q, zno, clone);
+		sts = BLK_STS_IOERR;
+		break;
+	}
+
+	/* Drop the extra reference on the IO */
+	dm_io_dec_pending(io, sts);
+
+	if (sts != BLK_STS_OK)
+		return DM_MAPIO_KILL;
+
+	return r;
+}
+
+/*
+ * IO completion callback called from clone_endio().
+ */
+void dm_zone_endio(struct dm_io *io, struct bio *clone)
+{
+	struct mapped_device *md = io->md;
+	struct request_queue *q = md->queue;
+	struct bio *orig_bio = io->orig_bio;
+	unsigned int zwp_offset;
+	unsigned int zno;
+
+	/*
+	 * For targets that do not emulate zone append, we only need to
+	 * handle native zone-append bios.
+	 */
+	if (!dm_emulate_zone_append(md)) {
+		/*
+		 * Get the offset within the zone of the written sector
+		 * and add that to the original bio sector position.
+		 */
+		if (clone->bi_status == BLK_STS_OK &&
+		    bio_op(clone) == REQ_OP_ZONE_APPEND) {
+			sector_t mask = (sector_t)blk_queue_zone_sectors(q) - 1;
+
+			orig_bio->bi_iter.bi_sector +=
+				clone->bi_iter.bi_sector & mask;
+		}
+
+		return;
+	}
+
+	/*
+	 * For targets that do emulate zone append, if the clone BIO does not
+	 * own the target zone write lock, we have nothing to do.
+	 */
+	if (!bio_flagged(clone, BIO_ZONE_WRITE_LOCKED))
+		return;
+
+	zno = bio_zone_no(orig_bio);
+
+	if (clone->bi_status != BLK_STS_OK) {
+		/*
+		 * BIOs that modify a zone write pointer may leave the zone
+		 * in an unknown state in case of failure (e.g. the write
+		 * pointer was only partially advanced). In this case, set
+		 * the target zone write pointer as invalid unless it is
+		 * already being updated.
+		 */
+		WRITE_ONCE(md->zwp_offset[zno], DM_ZONE_INVALID_WP_OFST);
+	} else if (bio_op(orig_bio) == REQ_OP_ZONE_APPEND) {
+		/*
+		 * Get the written sector for zone append operation that were
+		 * emulated using regular write operations.
+		 */
+		zwp_offset = READ_ONCE(md->zwp_offset[zno]);
+		if (WARN_ON_ONCE(zwp_offset < bio_sectors(orig_bio)))
+			WRITE_ONCE(md->zwp_offset[zno],
+				   DM_ZONE_INVALID_WP_OFST);
+		else
+			orig_bio->bi_iter.bi_sector +=
+				zwp_offset - bio_sectors(orig_bio);
+	}
+
+	dm_zone_unlock(q, zno, clone);
 }
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 49bd18e99af6..420a12b42708 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -876,7 +876,6 @@ static void clone_endio(struct bio *bio)
 	struct dm_io *io = tio->io;
 	struct mapped_device *md = tio->io->md;
 	dm_endio_fn endio = tio->ti->type->end_io;
-	struct bio *orig_bio = io->orig_bio;
 	struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 
 	if (unlikely(error == BLK_STS_TARGET)) {
@@ -891,17 +890,8 @@ static void clone_endio(struct bio *bio)
 			disable_write_zeroes(md);
 	}
 
-	/*
-	 * For zone-append bios get offset in zone of the written
-	 * sector and add that to the original bio sector pos.
-	 */
-	if (bio_op(orig_bio) == REQ_OP_ZONE_APPEND) {
-		sector_t written_sector = bio->bi_iter.bi_sector;
-		struct request_queue *q = orig_bio->bi_bdev->bd_disk->queue;
-		u64 mask = (u64)blk_queue_zone_sectors(q) - 1;
-
-		orig_bio->bi_iter.bi_sector += written_sector & mask;
-	}
+	if (blk_queue_is_zoned(q))
+		dm_zone_endio(io, bio);
 
 	if (endio) {
 		int r = endio(tio->ti, bio, &error);
@@ -1213,7 +1203,16 @@ static blk_qc_t __map_bio(struct dm_target_io *tio)
 		down(&md->swap_bios_semaphore);
 	}
 
-	r = ti->type->map(ti, clone);
+	/*
+	 * Check if the IO needs a special mapping due to zone append emulation
+	 * on zoned target. In this case, dm_zone_map_bio() calls the target
+	 * map operation.
+	 */
+	if (dm_emulate_zone_append(io->md))
+		r = dm_zone_map_bio(tio);
+	else
+		r = ti->type->map(ti, clone);
+
 	switch (r) {
 	case DM_MAPIO_SUBMITTED:
 		break;
@@ -1711,6 +1710,7 @@ static void cleanup_mapped_device(struct mapped_device *md)
 	mutex_destroy(&md->swap_bios_lock);
 
 	dm_mq_cleanup_mapped_device(md);
+	dm_cleanup_zoned_dev(md);
 }
 
 /*
@@ -1956,11 +1956,16 @@ static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t,
 		goto out;
 	}
 
+	ret = dm_table_set_restrictions(t, q, limits);
+	if (ret) {
+		old_map = ERR_PTR(ret);
+		goto out;
+	}
+
 	old_map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock));
 	rcu_assign_pointer(md->map, (void *)t);
 	md->immutable_target_type = dm_table_get_immutable_target_type(t);
 
-	dm_table_set_restrictions(t, q, limits);
 	if (old_map)
 		dm_sync_table(md);
 
@@ -2079,7 +2084,10 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t)
 		DMERR("Cannot calculate initial queue limits");
 		return r;
 	}
-	dm_table_set_restrictions(t, md->queue, &limits);
+	r = dm_table_set_restrictions(t, md->queue, &limits);
+	if (r)
+		return r;
+
 	blk_register_queue(md->disk);
 
 	return 0;
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 39c243258e24..742d9c80efe1 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -45,6 +45,8 @@ struct dm_dev_internal {
 
 struct dm_table;
 struct dm_md_mempools;
+struct dm_target_io;
+struct dm_io;
 
 /*-----------------------------------------------------------------
  * Internal table functions.
@@ -56,8 +58,8 @@ struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector);
 bool dm_table_has_no_data_devices(struct dm_table *table);
 int dm_calculate_queue_limits(struct dm_table *table,
 			      struct queue_limits *limits);
-void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
-			       struct queue_limits *limits);
+int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
+			      struct queue_limits *limits);
 struct list_head *dm_table_get_devices(struct dm_table *t);
 void dm_table_presuspend_targets(struct dm_table *t);
 void dm_table_presuspend_undo_targets(struct dm_table *t);
@@ -103,17 +105,25 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
 /*
  * Zoned targets related functions.
  */
-void dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q);
+int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q);
+void dm_zone_endio(struct dm_io *io, struct bio *clone);
 #ifdef CONFIG_BLK_DEV_ZONED
+void dm_cleanup_zoned_dev(struct mapped_device *md);
 int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
 			unsigned int nr_zones, report_zones_cb cb, void *data);
 bool dm_is_zone_write(struct mapped_device *md, struct bio *bio);
+int dm_zone_map_bio(struct dm_target_io *io);
 #else
+static inline void dm_cleanup_zoned_dev(struct mapped_device *md) {}
 #define dm_blk_report_zones	NULL
 static inline bool dm_is_zone_write(struct mapped_device *md, struct bio *bio)
 {
 	return false;
 }
+static inline int dm_zone_map_bio(struct dm_target_io *tio)
+{
+	return DM_MAPIO_KILL;
+}
 #endif
 
 /*-----------------------------------------------------------------
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index caea0a079d2d..7457d49acf9a 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -361,6 +361,12 @@ struct dm_target {
 	 * Set if we need to limit the number of in-flight bios when swapping.
 	 */
 	bool limit_swap_bios:1;
+
+	/*
+	 * Set if this target implements a a zoned device and needs emulation of
+	 * zone append operations using regular writes.
+	 */
+	bool emulate_zone_append:1;
 };
 
 void *dm_per_bio_data(struct bio *bio, size_t data_size);