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dm: Convert to bdev_open_by_dev()

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Convert device mapper to use bdev_open_by_dev() and pass the handle
around.

CC: Alasdair Kergon <agk@redhat.com>
CC: Mike Snitzer <snitzer@kernel.org>
CC: dm-devel@redhat.com
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230927093442.25915-10-jack@suse.cz
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Jan Kara 2023-09-27 11:34:16 +02:00 committed by Christian Brauner
parent 631b001fd6
commit c2fce61fb2
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
2 changed files with 12 additions and 9 deletions
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20
drivers/md/dm.c
View File

@ -724,7 +724,7 @@ static struct table_device *open_table_device(struct mapped_device *md,
dev_t dev, blk_mode_t mode)
{
struct table_device *td;
struct block_device *bdev;
struct bdev_handle *bdev_handle;
u64 part_off;
int r;
@ -733,9 +733,9 @@ static struct table_device *open_table_device(struct mapped_device *md,
return ERR_PTR(-ENOMEM);
refcount_set(&td->count, 1);
bdev = blkdev_get_by_dev(dev, mode, _dm_claim_ptr, NULL);
if (IS_ERR(bdev)) {
r = PTR_ERR(bdev);
bdev_handle = bdev_open_by_dev(dev, mode, _dm_claim_ptr, NULL);
if (IS_ERR(bdev_handle)) {
r = PTR_ERR(bdev_handle);
goto out_free_td;
}
@ -745,20 +745,22 @@ static struct table_device *open_table_device(struct mapped_device *md,
* called.
*/
if (md->disk->slave_dir) {
r = bd_link_disk_holder(bdev, md->disk);
r = bd_link_disk_holder(bdev_handle->bdev, md->disk);
if (r)
goto out_blkdev_put;
}
td->dm_dev.mode = mode;
td->dm_dev.bdev = bdev;
td->dm_dev.dax_dev = fs_dax_get_by_bdev(bdev, &part_off, NULL, NULL);
td->dm_dev.bdev = bdev_handle->bdev;
td->dm_dev.bdev_handle = bdev_handle;
td->dm_dev.dax_dev = fs_dax_get_by_bdev(bdev_handle->bdev, &part_off,
NULL, NULL);
format_dev_t(td->dm_dev.name, dev);
list_add(&td->list, &md->table_devices);
return td;
out_blkdev_put:
blkdev_put(bdev, _dm_claim_ptr);
bdev_release(bdev_handle);
out_free_td:
kfree(td);
return ERR_PTR(r);
@ -771,7 +773,7 @@ static void close_table_device(struct table_device *td, struct mapped_device *md
{
if (md->disk->slave_dir)
bd_unlink_disk_holder(td->dm_dev.bdev, md->disk);
blkdev_put(td->dm_dev.bdev, _dm_claim_ptr);
bdev_release(td->dm_dev.bdev_handle);
put_dax(td->dm_dev.dax_dev);
list_del(&td->list);
kfree(td);

1
include/linux/device-mapper.h
View File

@ -165,6 +165,7 @@ void dm_error(const char *message);
struct dm_dev {
struct block_device *bdev;
struct bdev_handle *bdev_handle;
struct dax_device *dax_dev;
blk_mode_t mode;
char name[16];