[PATCH 05/11] dm-zoned: introduce dmz_metadata_label() to format device name

[Hannes Reinecke <hare@suse.de>]

Introduce dmz_metadata_label() to format the device-mapper device
name and use it instead of the device name of the underlying device.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/md/dm-zoned-metadata.c | 11 ++++++++++-
 drivers/md/dm-zoned-reclaim.c  | 15 ++++++++-------
 drivers/md/dm-zoned-target.c   | 17 ++++++++++-------
 drivers/md/dm-zoned.h          |  4 +++-
 4 files changed, 31 insertions(+), 16 deletions(-)

diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c
index ae261bf6452c..f7ae57e78230 100644
--- a/drivers/md/dm-zoned-metadata.c
+++ b/drivers/md/dm-zoned-metadata.c
@@ -134,6 +134,8 @@ struct dmz_sb {
 struct dmz_metadata {
 	struct dmz_dev		*dev;
 
+	char			devname[BDEVNAME_SIZE];
+
 	sector_t		zone_bitmap_size;
 	unsigned int		zone_nr_bitmap_blocks;
 	unsigned int		zone_bits_per_mblk;
@@ -265,6 +267,11 @@ unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd)
 	return atomic_read(&zmd->unmap_nr_seq);
 }
 
+const char *dmz_metadata_label(struct dmz_metadata *zmd)
+{
+	return (const char *)zmd->devname;
+}
+
 /*
  * Lock/unlock mapping table.
  * The map lock also protects all the zone lists.
@@ -2445,7 +2452,8 @@ static void dmz_cleanup_metadata(struct dmz_metadata *zmd)
 /*
  * Initialize the zoned metadata.
  */
-int dmz_ctr_metadata(struct dmz_dev *dev, struct dmz_metadata **metadata)
+int dmz_ctr_metadata(struct dmz_dev *dev, struct dmz_metadata **metadata,
+		     const char *devname)
 {
 	struct dmz_metadata *zmd;
 	unsigned int i, zid;
@@ -2456,6 +2464,7 @@ int dmz_ctr_metadata(struct dmz_dev *dev, struct dmz_metadata **metadata)
 	if (!zmd)
 		return -ENOMEM;
 
+	strcpy(zmd->devname, devname);
 	zmd->dev = dev;
 	zmd->mblk_rbtree = RB_ROOT;
 	init_rwsem(&zmd->mblk_sem);
diff --git a/drivers/md/dm-zoned-reclaim.c b/drivers/md/dm-zoned-reclaim.c
index 95d2c8870480..c46159b6fc46 100644
--- a/drivers/md/dm-zoned-reclaim.c
+++ b/drivers/md/dm-zoned-reclaim.c
@@ -481,15 +481,16 @@ static void dmz_reclaim_work(struct work_struct *work)
 		zrc->kc_throttle.throttle = min(75U, 100U - p_unmap_rnd / 2);
 	}
 
-	dmz_dev_debug(zrc->dev,
-		      "Reclaim (%u): %s, %u%% free rnd zones (%u/%u)",
-		      zrc->kc_throttle.throttle,
-		      (dmz_target_idle(zrc) ? "Idle" : "Busy"),
-		      p_unmap_rnd, nr_unmap_rnd, nr_rnd);
+	DMDEBUG("(%s): Reclaim (%u): %s, %u%% free rnd zones (%u/%u)",
+		dmz_metadata_label(zmd),
+		zrc->kc_throttle.throttle,
+		(dmz_target_idle(zrc) ? "Idle" : "Busy"),
+		p_unmap_rnd, nr_unmap_rnd, nr_rnd);
 
 	ret = dmz_do_reclaim(zrc);
 	if (ret) {
-		dmz_dev_debug(zrc->dev, "Reclaim error %d\n", ret);
+		DMDEBUG("(%s): Reclaim error %d\n",
+			dmz_metadata_label(zmd), ret);
 		if (!dmz_check_bdev(zrc->dev))
 			return;
 	}
@@ -525,7 +526,7 @@ int dmz_ctr_reclaim(struct dmz_dev *dev, struct dmz_metadata *zmd,
 	/* Reclaim work */
 	INIT_DELAYED_WORK(&zrc->work, dmz_reclaim_work);
 	zrc->wq = alloc_ordered_workqueue("dmz_rwq_%s", WQ_MEM_RECLAIM,
-					  dev->name);
+					  dmz_metadata_label(zmd));
 	if (!zrc->wq) {
 		ret = -ENOMEM;
 		goto err;
diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c
index f4e3be7f9474..c2c3aa090f97 100644
--- a/drivers/md/dm-zoned-target.c
+++ b/drivers/md/dm-zoned-target.c
@@ -782,7 +782,8 @@ static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 
 	/* Initialize metadata */
 	dev = dmz->dev;
-	ret = dmz_ctr_metadata(dev, &dmz->metadata);
+	ret = dmz_ctr_metadata(dev, &dmz->metadata,
+			       dm_table_device_name(ti->table));
 	if (ret) {
 		ti->error = "Metadata initialization failed";
 		goto err_dev;
@@ -811,8 +812,9 @@ static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	/* Chunk BIO work */
 	mutex_init(&dmz->chunk_lock);
 	INIT_RADIX_TREE(&dmz->chunk_rxtree, GFP_NOIO);
-	dmz->chunk_wq = alloc_workqueue("dmz_cwq_%s", WQ_MEM_RECLAIM | WQ_UNBOUND,
-					0, dev->name);
+	dmz->chunk_wq = alloc_workqueue("dmz_cwq_%s",
+					WQ_MEM_RECLAIM | WQ_UNBOUND, 0,
+					dmz_metadata_label(dmz->metadata));
 	if (!dmz->chunk_wq) {
 		ti->error = "Create chunk workqueue failed";
 		ret = -ENOMEM;
@@ -824,7 +826,7 @@ static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	bio_list_init(&dmz->flush_list);
 	INIT_DELAYED_WORK(&dmz->flush_work, dmz_flush_work);
 	dmz->flush_wq = alloc_ordered_workqueue("dmz_fwq_%s", WQ_MEM_RECLAIM,
-						dev->name);
+						dmz_metadata_label(dmz->metadata));
 	if (!dmz->flush_wq) {
 		ti->error = "Create flush workqueue failed";
 		ret = -ENOMEM;
@@ -839,9 +841,10 @@ static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 		goto err_fwq;
 	}
 
-	dmz_dev_info(dev, "Target device: %llu 512-byte logical sectors (%llu blocks)",
-		     (unsigned long long)ti->len,
-		     (unsigned long long)dmz_sect2blk(ti->len));
+	DMINFO("(%s): Target device: %llu 512-byte logical sectors (%llu blocks)",
+	       dmz_metadata_label(dmz->metadata),
+	       (unsigned long long)ti->len,
+	       (unsigned long long)dmz_sect2blk(ti->len));
 
 	return 0;
 err_fwq:
diff --git a/drivers/md/dm-zoned.h b/drivers/md/dm-zoned.h
index c1b7b9a729c2..f7df7f67e404 100644
--- a/drivers/md/dm-zoned.h
+++ b/drivers/md/dm-zoned.h
@@ -163,7 +163,8 @@ struct dmz_reclaim;
 /*
  * Functions defined in dm-zoned-metadata.c
  */
-int dmz_ctr_metadata(struct dmz_dev *dev, struct dmz_metadata **zmd);
+int dmz_ctr_metadata(struct dmz_dev *dev, struct dmz_metadata **zmd,
+		     const char *devname);
 void dmz_dtr_metadata(struct dmz_metadata *zmd);
 int dmz_resume_metadata(struct dmz_metadata *zmd);
 
@@ -174,6 +175,7 @@ void dmz_unlock_metadata(struct dmz_metadata *zmd);
 void dmz_lock_flush(struct dmz_metadata *zmd);
 void dmz_unlock_flush(struct dmz_metadata *zmd);
 int dmz_flush_metadata(struct dmz_metadata *zmd);
+const char *dmz_metadata_label(struct dmz_metadata *zmd);
 
 unsigned int dmz_id(struct dmz_metadata *zmd, struct dm_zone *zone);
 sector_t dmz_start_sect(struct dmz_metadata *zmd, struct dm_zone *zone);
-- 
2.25.0