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s390: port block device access to file

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Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-16-adbd023e19cc@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2024-01-23 14:26:33 +01:00
parent e9a7254b03
commit c8e108d80c
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
4 changed files with 25 additions and 25 deletions
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10
drivers/s390/block/dasd.c
View File

@ -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));

36
drivers/s390/block/dasd_genhd.c
View File

@ -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)

2
drivers/s390/block/dasd_int.h
View File

@ -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 */

2
drivers/s390/block/dasd_ioctl.c
View File

@ -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++;
/*