rnbd-srv: remove the name field from struct rnbd_dev

Just print the block device name directly using the %pg format specifier.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20220713055317.1888500-7-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/rnbd/rnbd-srv-dev.c

@@ -28,7 +28,6 @@ struct rnbd_dev *rnbd_dev_open(const char *path, fmode_t flags)
 		goto err;
 
 	dev->blk_open_flags = flags;
-	bdevname(dev->bdev, dev->name);
 
 	return dev;
 

drivers/block/rnbd/rnbd-srv-dev.h

@@ -15,7 +15,6 @@
 struct rnbd_dev {
 	struct block_device	*bdev;
 	fmode_t			blk_open_flags;
-	char			name[BDEVNAME_SIZE];
 };
 
 /**

drivers/block/rnbd/rnbd-srv-sysfs.c

@@ -38,14 +38,13 @@ static struct kobj_type dev_ktype = {
 };
 
 int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,
-			       struct block_device *bdev,
-			       const char *dev_name)
+			       struct block_device *bdev)
 {
 	struct kobject *bdev_kobj;
 	int ret;
 
 	ret = kobject_init_and_add(&dev->dev_kobj, &dev_ktype,
-				   rnbd_devs_kobj, dev_name);
+				   rnbd_devs_kobj, "%pg", bdev);
 	if (ret) {
 		kobject_put(&dev->dev_kobj);
 		return ret;

drivers/block/rnbd/rnbd-srv.c

@@ -419,7 +419,7 @@ static struct rnbd_srv_sess_dev
 	return sess_dev;
 }
 
-static struct rnbd_srv_dev *rnbd_srv_init_srv_dev(const char *id)
+static struct rnbd_srv_dev *rnbd_srv_init_srv_dev(struct block_device *bdev)
 {
 	struct rnbd_srv_dev *dev;
 
@@ -427,7 +427,7 @@ static struct rnbd_srv_dev *rnbd_srv_init_srv_dev(const char *id)
 	if (!dev)
 		return ERR_PTR(-ENOMEM);
 
-	strscpy(dev->id, id, sizeof(dev->id));
+	snprintf(dev->id, sizeof(dev->id), "%pg", bdev);
 	kref_init(&dev->kref);
 	INIT_LIST_HEAD(&dev->sess_dev_list);
 	mutex_init(&dev->lock);
@@ -512,7 +512,7 @@ rnbd_srv_get_or_create_srv_dev(struct rnbd_dev *rnbd_dev,
 	int ret;
 	struct rnbd_srv_dev *new_dev, *dev;
 
-	new_dev = rnbd_srv_init_srv_dev(rnbd_dev->name);
+	new_dev = rnbd_srv_init_srv_dev(rnbd_dev->bdev);
 	if (IS_ERR(new_dev))
 		return new_dev;
 
@@ -758,8 +758,7 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 	 */
 	mutex_lock(&srv_dev->lock);
 	if (!srv_dev->dev_kobj.state_in_sysfs) {
-		ret = rnbd_srv_create_dev_sysfs(srv_dev, rnbd_dev->bdev,
-						 rnbd_dev->name);
+		ret = rnbd_srv_create_dev_sysfs(srv_dev, rnbd_dev->bdev);
 		if (ret) {
 			mutex_unlock(&srv_dev->lock);
 			rnbd_srv_err(srv_sess_dev,

drivers/block/rnbd/rnbd-srv.h

@@ -68,8 +68,7 @@ void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev,
 /* rnbd-srv-sysfs.c */
 
 int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,
-			      struct block_device *bdev,
-			      const char *dir_name);
+			      struct block_device *bdev);
 void rnbd_srv_destroy_dev_sysfs(struct rnbd_srv_dev *dev);
 int rnbd_srv_create_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
 void rnbd_srv_destroy_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);