dm zoned: remove 'dev' argument from reclaim

Use the dmz_zone_to_dev() mapping function to remove the
'dev' argument from reclaim.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm-zoned-reclaim.c

@@ -13,7 +13,6 @@
 
 struct dmz_reclaim {
 	struct dmz_metadata     *metadata;
-	struct dmz_dev		*dev;
 
 	struct delayed_work	work;
 	struct workqueue_struct *wq;
@@ -59,6 +58,7 @@ static int dmz_reclaim_align_wp(struct dmz_reclaim *zrc, struct dm_zone *zone,
 				sector_t block)
 {
 	struct dmz_metadata *zmd = zrc->metadata;
+	struct dmz_dev *dev = dmz_zone_to_dev(zmd, zone);
 	sector_t wp_block = zone->wp_block;
 	unsigned int nr_blocks;
 	int ret;
@@ -74,15 +74,15 @@ static int dmz_reclaim_align_wp(struct dmz_reclaim *zrc, struct dm_zone *zone,
 	 * pointer and the requested position.
 	 */
 	nr_blocks = block - wp_block;
-	ret = blkdev_issue_zeroout(zrc->dev->bdev,
+	ret = blkdev_issue_zeroout(dev->bdev,
 				   dmz_start_sect(zmd, zone) + dmz_blk2sect(wp_block),
 				   dmz_blk2sect(nr_blocks), GFP_NOIO, 0);
 	if (ret) {
-		dmz_dev_err(zrc->dev,
+		dmz_dev_err(dev,
 			    "Align zone %u wp %llu to %llu (wp+%u) blocks failed %d",
 			    zone->id, (unsigned long long)wp_block,
 			    (unsigned long long)block, nr_blocks, ret);
-		dmz_check_bdev(zrc->dev);
+		dmz_check_bdev(dev);
 		return ret;
 	}
 
@@ -116,7 +116,7 @@ static int dmz_reclaim_copy(struct dmz_reclaim *zrc,
 			    struct dm_zone *src_zone, struct dm_zone *dst_zone)
 {
 	struct dmz_metadata *zmd = zrc->metadata;
-	struct dmz_dev *dev = zrc->dev;
+	struct dmz_dev *src_dev, *dst_dev;
 	struct dm_io_region src, dst;
 	sector_t block = 0, end_block;
 	sector_t nr_blocks;
@@ -130,13 +130,17 @@ static int dmz_reclaim_copy(struct dmz_reclaim *zrc,
 	else
 		end_block = dmz_zone_nr_blocks(zmd);
 	src_zone_block = dmz_start_block(zmd, src_zone);
+	src_dev = dmz_zone_to_dev(zmd, src_zone);
 	dst_zone_block = dmz_start_block(zmd, dst_zone);
+	dst_dev = dmz_zone_to_dev(zmd, dst_zone);
 
 	if (dmz_is_seq(dst_zone))
 		set_bit(DM_KCOPYD_WRITE_SEQ, &flags);
 
 	while (block < end_block) {
-		if (dev->flags & DMZ_BDEV_DYING)
+		if (src_dev->flags & DMZ_BDEV_DYING)
+			return -EIO;
+		if (dst_dev->flags & DMZ_BDEV_DYING)
 			return -EIO;
 
 		/* Get a valid region from the source zone */
@@ -156,11 +160,11 @@ static int dmz_reclaim_copy(struct dmz_reclaim *zrc,
 				return ret;
 		}
 
-		src.bdev = dev->bdev;
+		src.bdev = src_dev->bdev;
 		src.sector = dmz_blk2sect(src_zone_block + block);
 		src.count = dmz_blk2sect(nr_blocks);
 
-		dst.bdev = dev->bdev;
+		dst.bdev = dst_dev->bdev;
 		dst.sector = dmz_blk2sect(dst_zone_block + block);
 		dst.count = src.count;
 
@@ -194,8 +198,8 @@ static int dmz_reclaim_buf(struct dmz_reclaim *zrc, struct dm_zone *dzone)
 	struct dmz_metadata *zmd = zrc->metadata;
 	int ret;
 
-	dmz_dev_debug(zrc->dev,
-		      "Chunk %u, move buf zone %u (weight %u) to data zone %u (weight %u)",
+	DMDEBUG("(%s): Chunk %u, move buf zone %u (weight %u) to data zone %u (weight %u)",
+		dmz_metadata_label(zmd),
 		dzone->chunk, bzone->id, dmz_weight(bzone),
 		dzone->id, dmz_weight(dzone));
 
@@ -233,8 +237,8 @@ static int dmz_reclaim_seq_data(struct dmz_reclaim *zrc, struct dm_zone *dzone)
 	struct dmz_metadata *zmd = zrc->metadata;
 	int ret = 0;
 
-	dmz_dev_debug(zrc->dev,
-		      "Chunk %u, move data zone %u (weight %u) to buf zone %u (weight %u)",
+	DMDEBUG("(%s): Chunk %u, move data zone %u (weight %u) to buf zone %u (weight %u)",
+		dmz_metadata_label(zmd),
 		chunk, dzone->id, dmz_weight(dzone),
 		bzone->id, dmz_weight(bzone));
 
@@ -285,8 +289,8 @@ static int dmz_reclaim_rnd_data(struct dmz_reclaim *zrc, struct dm_zone *dzone)
 	if (!szone)
 		return -ENOSPC;
 
-	dmz_dev_debug(zrc->dev,
-		      "Chunk %u, move rnd zone %u (weight %u) to seq zone %u",
+	DMDEBUG("(%s): Chunk %u, move rnd zone %u (weight %u) to seq zone %u",
+		dmz_metadata_label(zmd),
 		chunk, dzone->id, dmz_weight(dzone), szone->id);
 
 	/* Flush the random data zone into the sequential zone */
@@ -352,7 +356,6 @@ static int dmz_do_reclaim(struct dmz_reclaim *zrc)
 		return PTR_ERR(dzone);
 
 	start = jiffies;
-
 	if (dmz_is_rnd(dzone)) {
 		if (!dmz_weight(dzone)) {
 			/* Empty zone */
@@ -400,13 +403,13 @@ static int dmz_do_reclaim(struct dmz_reclaim *zrc)
 
 	ret = dmz_flush_metadata(zrc->metadata);
 	if (ret) {
-		dmz_dev_debug(zrc->dev,
-			      "Metadata flush for zone %u failed, err %d\n",
-			      rzone->id, ret);
+		DMDEBUG("(%s): Metadata flush for zone %u failed, err %d\n",
+			dmz_metadata_label(zmd), rzone->id, ret);
 		return ret;
 	}
 
-	dmz_dev_debug(zrc->dev, "Reclaimed zone %u in %u ms",
+	DMDEBUG("(%s): Reclaimed zone %u in %u ms",
+		dmz_metadata_label(zmd),
 		rzone->id, jiffies_to_msecs(jiffies - start));
 	return 0;
 }
@@ -500,7 +503,7 @@ static void dmz_reclaim_work(struct work_struct *work)
 /*
  * Initialize reclaim.
  */
-int dmz_ctr_reclaim(struct dmz_dev *dev, struct dmz_metadata *zmd,
+int dmz_ctr_reclaim(struct dmz_metadata *zmd,
 		    struct dmz_reclaim **reclaim)
 {
 	struct dmz_reclaim *zrc;
@@ -510,7 +513,6 @@ int dmz_ctr_reclaim(struct dmz_dev *dev, struct dmz_metadata *zmd,
 	if (!zrc)
 		return -ENOMEM;
 
-	zrc->dev = dev;
 	zrc->metadata = zmd;
 	zrc->atime = jiffies;
 

drivers/md/dm-zoned-target.c

@@ -840,7 +840,7 @@ static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	mod_delayed_work(dmz->flush_wq, &dmz->flush_work, DMZ_FLUSH_PERIOD);
 
 	/* Initialize reclaim */
-	ret = dmz_ctr_reclaim(dev, dmz->metadata, &dmz->reclaim);
+	ret = dmz_ctr_reclaim(dmz->metadata, &dmz->reclaim);
 	if (ret) {
 		ti->error = "Zone reclaim initialization failed";
 		goto err_fwq;

drivers/md/dm-zoned.h

@@ -180,6 +180,7 @@ const char *dmz_metadata_label(struct dmz_metadata *zmd);
 sector_t dmz_start_sect(struct dmz_metadata *zmd, struct dm_zone *zone);
 sector_t dmz_start_block(struct dmz_metadata *zmd, struct dm_zone *zone);
 unsigned int dmz_nr_chunks(struct dmz_metadata *zmd);
+struct dmz_dev *dmz_zone_to_dev(struct dmz_metadata *zmd, struct dm_zone *zone);
 
 bool dmz_check_dev(struct dmz_metadata *zmd);
 bool dmz_dev_is_dying(struct dmz_metadata *zmd);
@@ -254,8 +255,7 @@ int dmz_merge_valid_blocks(struct dmz_metadata *zmd, struct dm_zone *from_zone,
 /*
  * Functions defined in dm-zoned-reclaim.c
  */
-int dmz_ctr_reclaim(struct dmz_dev *dev, struct dmz_metadata *zmd,
-		    struct dmz_reclaim **zrc);
+int dmz_ctr_reclaim(struct dmz_metadata *zmd, struct dmz_reclaim **zrc);
 void dmz_dtr_reclaim(struct dmz_reclaim *zrc);
 void dmz_suspend_reclaim(struct dmz_reclaim *zrc);
 void dmz_resume_reclaim(struct dmz_reclaim *zrc);