summaryrefslogtreecommitdiffstats
path: root/drivers/md/dm-thin-metadata.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/md/dm-thin-metadata.h')
-rw-r--r--drivers/md/dm-thin-metadata.h25
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