Unverified Commit c8e108d8 authored by Christian Brauner's avatar Christian Brauner
Browse files

s390: port block device access to file 

Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-16-adbd023e19cc@kernel.org


Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent e9a7254b

drivers/s390/block/dasd.c

+5 −5
Original line number Diff line number Diff line
@@ -412,7 +412,7 @@ dasd_state_ready_to_online(struct dasd_device * device) 
					KOBJ_CHANGE);

			return 0;

		}

		disk_uevent(device->block->bdev_handle->bdev->bd_disk,

		disk_uevent(file_bdev(device->block->bdev_file)->bd_disk,

			    KOBJ_CHANGE);

	}

	return 0;
@@ -433,7 +433,7 @@ static int dasd_state_online_to_ready(struct dasd_device *device) 


	device->state = DASD_STATE_READY;

	if (device->block && !(device->features & DASD_FEATURE_USERAW))

		disk_uevent(device->block->bdev_handle->bdev->bd_disk,

		disk_uevent(file_bdev(device->block->bdev_file)->bd_disk,

			    KOBJ_CHANGE);

	return 0;

}
@@ -3588,7 +3588,7 @@ int dasd_generic_set_offline(struct ccw_device *cdev) 
	 * in the other openers.

	 */

	if (device->block) {

		max_count = device->block->bdev_handle ? 0 : -1;

		max_count = device->block->bdev_file ? 0 : -1;

		open_count = atomic_read(&device->block->open_count);

		if (open_count > max_count) {

			if (open_count > 0)
@@ -3634,8 +3634,8 @@ int dasd_generic_set_offline(struct ccw_device *cdev) 
		 * so sync bdev first and then wait for our queues to become

		 * empty

		 */

		if (device->block && device->block->bdev_handle)

			bdev_mark_dead(device->block->bdev_handle->bdev, false);

		if (device->block && device->block->bdev_file)

			bdev_mark_dead(file_bdev(device->block->bdev_file), false);

		dasd_schedule_device_bh(device);

		rc = wait_event_interruptible(shutdown_waitq,

					      _wait_for_empty_queues(device));

drivers/s390/block/dasd_genhd.c

+18 −18
Original line number Diff line number Diff line
@@ -127,15 +127,15 @@ void dasd_gendisk_free(struct dasd_block *block) 
 */

int dasd_scan_partitions(struct dasd_block *block)

{

	struct bdev_handle *bdev_handle;

	struct file *bdev_file;

	int rc;



	bdev_handle = bdev_open_by_dev(disk_devt(block->gdp), BLK_OPEN_READ,

	bdev_file = bdev_file_open_by_dev(disk_devt(block->gdp), BLK_OPEN_READ,

				       NULL, NULL);

	if (IS_ERR(bdev_handle)) {

	if (IS_ERR(bdev_file)) {

		DBF_DEV_EVENT(DBF_ERR, block->base,

			      "scan partitions error, blkdev_get returned %ld",

			      PTR_ERR(bdev_handle));

			      PTR_ERR(bdev_file));

		return -ENODEV;

	}
@@ -147,15 +147,15 @@ int dasd_scan_partitions(struct dasd_block *block) 
				"scan partitions error, rc %d", rc);



	/*

	 * Since the matching bdev_release() call to the

	 * bdev_open_by_path() in this function is not called before

	 * Since the matching fput() call to the

	 * bdev_file_open_by_path() in this function is not called before

	 * dasd_destroy_partitions the offline open_count limit needs to be

	 * increased from 0 to 1. This is done by setting device->bdev_handle

	 * increased from 0 to 1. This is done by setting device->bdev_file

	 * (see dasd_generic_set_offline). As long as the partition detection

	 * is running no offline should be allowed. That is why the assignment

	 * to block->bdev_handle is done AFTER the BLKRRPART ioctl.

	 * to block->bdev_file is done AFTER the BLKRRPART ioctl.

	 */

	block->bdev_handle = bdev_handle;

	block->bdev_file = bdev_file;

	return 0;

}
@@ -165,21 +165,21 @@ int dasd_scan_partitions(struct dasd_block *block) 
 */

void dasd_destroy_partitions(struct dasd_block *block)

{

	struct bdev_handle *bdev_handle;

	struct file *bdev_file;



	/*

	 * Get the bdev_handle pointer from the device structure and clear

	 * device->bdev_handle to lower the offline open_count limit again.

	 * Get the bdev_file pointer from the device structure and clear

	 * device->bdev_file to lower the offline open_count limit again.

	 */

	bdev_handle = block->bdev_handle;

	block->bdev_handle = NULL;

	bdev_file = block->bdev_file;

	block->bdev_file = NULL;



	mutex_lock(&bdev_handle->bdev->bd_disk->open_mutex);

	bdev_disk_changed(bdev_handle->bdev->bd_disk, true);

	mutex_unlock(&bdev_handle->bdev->bd_disk->open_mutex);

	mutex_lock(&file_bdev(bdev_file)->bd_disk->open_mutex);

	bdev_disk_changed(file_bdev(bdev_file)->bd_disk, true);

	mutex_unlock(&file_bdev(bdev_file)->bd_disk->open_mutex);



	/* Matching blkdev_put to the blkdev_get in dasd_scan_partitions. */

	bdev_release(bdev_handle);

	fput(bdev_file);

}



int dasd_gendisk_init(void)

drivers/s390/block/dasd_int.h

+1 −1
Original line number Diff line number Diff line
@@ -650,7 +650,7 @@ struct dasd_block { 
	struct gendisk *gdp;

	spinlock_t request_queue_lock;

	struct blk_mq_tag_set tag_set;

	struct bdev_handle *bdev_handle;

	struct file *bdev_file;

	atomic_t open_count;



	unsigned long blocks;	   /* size of volume in blocks */

drivers/s390/block/dasd_ioctl.c

+1 −1
Original line number Diff line number Diff line
@@ -537,7 +537,7 @@ static int __dasd_ioctl_information(struct dasd_block *block, 
	 * This must be hidden from user-space.

	 */

	dasd_info->open_count = atomic_read(&block->open_count);

	if (!block->bdev_handle)

	if (!block->bdev_file)

		dasd_info->open_count++;



	/*