diff options
Diffstat (limited to 'drivers/md/dm-snap.h')
| -rw-r--r-- | drivers/md/dm-snap.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/md/dm-snap.h b/drivers/md/dm-snap.h index fdec1e2dc871..15fa2ae6cdc2 100644 --- a/drivers/md/dm-snap.h +++ b/drivers/md/dm-snap.h @@ -10,7 +10,9 @@ #define DM_SNAPSHOT_H #include "dm.h" +#include "dm-bio-list.h" #include <linux/blkdev.h> +#include <linux/workqueue.h> struct exception_table { uint32_t hash_mask; @@ -112,10 +114,20 @@ struct dm_snapshot { struct exception_table pending; struct exception_table complete; + /* + * pe_lock protects all pending_exception operations and access + * as well as the snapshot_bios list. + */ + spinlock_t pe_lock; + /* The on disk metadata handler */ struct exception_store store; struct kcopyd_client *kcopyd_client; + + /* Queue of snapshot writes for ksnapd to flush */ + struct bio_list queued_bios; + struct work_struct queued_bios_work; }; /* @@ -128,10 +140,9 @@ int dm_add_exception(struct dm_snapshot *s, chunk_t old, chunk_t new); * Constructor and destructor for the default persistent * store. */ -int dm_create_persistent(struct exception_store *store, uint32_t chunk_size); +int dm_create_persistent(struct exception_store *store); -int dm_create_transient(struct exception_store *store, - struct dm_snapshot *s, int blocksize); +int dm_create_transient(struct exception_store *store); /* * Return the number of sectors in the device. |