[PATCH 3/6] block: add support for zone offline transition

["Javier González" <javier@javigon.com>]

From: Javier González <javier.gonz@samsung.com>

Add support for offline transition on the zoned block device using the
new zone management IOCTL

Signed-off-by: Javier González <javier.gonz@samsung.com>
Signed-off-by: SelvaKumar S <selvakuma.s1@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com>
---
 block/blk-core.c              | 2 ++
 block/blk-zoned.c             | 3 +++
 drivers/nvme/host/core.c      | 3 +++
 include/linux/blk_types.h     | 3 +++
 include/linux/blkdev.h        | 1 -
 include/uapi/linux/blkzoned.h | 1 +
 6 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index 03252af8c82c..589cbdacc5ec 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -140,6 +140,7 @@ static const char *const blk_op_name[] = {
 	REQ_OP_NAME(ZONE_CLOSE),
 	REQ_OP_NAME(ZONE_FINISH),
 	REQ_OP_NAME(ZONE_APPEND),
+	REQ_OP_NAME(ZONE_OFFLINE),
 	REQ_OP_NAME(WRITE_SAME),
 	REQ_OP_NAME(WRITE_ZEROES),
 	REQ_OP_NAME(SCSI_IN),
@@ -1030,6 +1031,7 @@ generic_make_request_checks(struct bio *bio)
 	case REQ_OP_ZONE_OPEN:
 	case REQ_OP_ZONE_CLOSE:
 	case REQ_OP_ZONE_FINISH:
+	case REQ_OP_ZONE_OFFLINE:
 		if (!blk_queue_is_zoned(q))
 			goto not_supported;
 		break;
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 29194388a1bb..704fc15813d1 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -416,6 +416,9 @@ int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
 	case BLK_ZONE_MGMT_RESET:
 		op = REQ_OP_ZONE_RESET;
 		break;
+	case BLK_ZONE_MGMT_OFFLINE:
+		op = REQ_OP_ZONE_OFFLINE;
+		break;
 	default:
 		return -ENOTTY;
 	}
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index f1215523792b..5b95c81d2a2d 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -776,6 +776,9 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
 	case REQ_OP_ZONE_FINISH:
 		ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_FINISH);
 		break;
+	case REQ_OP_ZONE_OFFLINE:
+		ret = nvme_setup_zone_mgmt_send(ns, req, cmd, NVME_ZONE_OFFLINE);
+		break;
 	case REQ_OP_WRITE_ZEROES:
 		ret = nvme_setup_write_zeroes(ns, req, cmd);
 		break;
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 16b57fb2b99c..b3921263c3dd 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -316,6 +316,8 @@ enum req_opf {
 	REQ_OP_ZONE_FINISH	= 12,
 	/* write data at the current zone write pointer */
 	REQ_OP_ZONE_APPEND	= 13,
+	/* Transition a zone to offline */
+	REQ_OP_ZONE_OFFLINE	= 14,
 
 	/* SCSI passthrough using struct scsi_request */
 	REQ_OP_SCSI_IN		= 32,
@@ -456,6 +458,7 @@ static inline bool op_is_zone_mgmt(enum req_opf op)
 	case REQ_OP_ZONE_OPEN:
 	case REQ_OP_ZONE_CLOSE:
 	case REQ_OP_ZONE_FINISH:
+	case REQ_OP_ZONE_OFFLINE:
 		return true;
 	default:
 		return false;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index bd8521f94dc4..8308d8a3720b 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -372,7 +372,6 @@ extern int blkdev_zone_ops_ioctl(struct block_device *bdev, fmode_t mode,
 				  unsigned int cmd, unsigned long arg);
 extern int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
 				  unsigned int cmd, unsigned long arg);
-
 #else /* CONFIG_BLK_DEV_ZONED */
 
 static inline unsigned int blkdev_nr_zones(struct gendisk *disk)
diff --git a/include/uapi/linux/blkzoned.h b/include/uapi/linux/blkzoned.h
index a8c89fe58f97..d0978ee10fc7 100644
--- a/include/uapi/linux/blkzoned.h
+++ b/include/uapi/linux/blkzoned.h
@@ -155,6 +155,7 @@ enum blk_zone_action {
 	BLK_ZONE_MGMT_FINISH	= 0x2,
 	BLK_ZONE_MGMT_OPEN	= 0x3,
 	BLK_ZONE_MGMT_RESET	= 0x4,
+	BLK_ZONE_MGMT_OFFLINE	= 0x5,
 };
 
 /**
-- 
2.17.1