diff options
Diffstat (limited to 'drivers/md/dm-thin-metadata.h')
| -rw-r--r-- | drivers/md/dm-thin-metadata.h | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/md/dm-thin-metadata.h b/drivers/md/dm-thin-metadata.h index b88918ccdaf..0cecc370288 100644 --- a/drivers/md/dm-thin-metadata.h +++ b/drivers/md/dm-thin-metadata.h @@ -38,7 +38,8 @@ typedef uint64_t dm_thin_id; * Reopens or creates a new, empty metadata volume. */ struct dm_pool_metadata *dm_pool_metadata_open(struct block_device *bdev, - sector_t data_block_size); + sector_t data_block_size, + bool format_device); int dm_pool_metadata_close(struct dm_pool_metadata *pmd); @@ -79,6 +80,16 @@ int dm_pool_delete_thin_device(struct dm_pool_metadata *pmd, int dm_pool_commit_metadata(struct dm_pool_metadata *pmd); /* + * Discards all uncommitted changes. Rereads the superblock, rolling back + * to the last good transaction. Thin devices remain open. + * dm_thin_aborted_changes() tells you if they had uncommitted changes. + * + * If this call fails it's only useful to call dm_pool_metadata_close(). + * All other methods will fail with -EINVAL. + */ +int dm_pool_abort_metadata(struct dm_pool_metadata *pmd); + +/* * Set/get userspace transaction id. */ int dm_pool_set_metadata_transaction_id(struct dm_pool_metadata *pmd, @@ -119,7 +130,7 @@ dm_thin_id dm_thin_dev_id(struct dm_thin_device *td); struct dm_thin_lookup_result { dm_block_t block; - int shared; + unsigned shared:1; }; /* @@ -147,6 +158,10 @@ int dm_thin_remove_block(struct dm_thin_device *td, dm_block_t block); /* * Queries. */ +bool dm_thin_changed_this_transaction(struct dm_thin_device *td); + +bool dm_thin_aborted_changes(struct dm_thin_device *td); + int dm_thin_get_highest_mapped_block(struct dm_thin_device *td, dm_block_t *highest_mapped); @@ -171,6 +186,12 @@ int dm_pool_get_data_dev_size(struct dm_pool_metadata *pmd, dm_block_t *result); */ int dm_pool_resize_data_dev(struct dm_pool_metadata *pmd, dm_block_t new_size); +/* + * Flicks the underlying block manager into read only mode, so you know + * that nothing is changing. + */ +void dm_pool_metadata_read_only(struct dm_pool_metadata *pmd); + /*----------------------------------------------------------------*/ #endif |