summaryrefslogtreecommitdiff
path: root/drivers/md/dm-snap.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/md/dm-snap.h')
-rw-r--r--drivers/md/dm-snap.h14
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/md/dm-snap.h b/drivers/md/dm-snap.h
index 24f9fb73b982..f07315fe2362 100644
--- a/drivers/md/dm-snap.h
+++ b/drivers/md/dm-snap.h
@@ -9,7 +9,7 @@
#ifndef DM_SNAPSHOT_H
#define DM_SNAPSHOT_H
-#include "dm.h"
+#include <linux/device-mapper.h>
#include "dm-bio-list.h"
#include <linux/blkdev.h>
#include <linux/workqueue.h>
@@ -130,6 +130,10 @@ struct exception_store {
void *context;
};
+#define DM_TRACKED_CHUNK_HASH_SIZE 16
+#define DM_TRACKED_CHUNK_HASH(x) ((unsigned long)(x) & \
+ (DM_TRACKED_CHUNK_HASH_SIZE - 1))
+
struct dm_snapshot {
struct rw_semaphore lock;
struct dm_target *ti;
@@ -154,8 +158,7 @@ struct dm_snapshot {
/* Used for display of table */
char type;
- /* The last percentage we notified */
- int last_percent;
+ mempool_t *pending_pool;
struct exception_table pending;
struct exception_table complete;
@@ -174,6 +177,11 @@ struct dm_snapshot {
/* Queue of snapshot writes for ksnapd to flush */
struct bio_list queued_bios;
struct work_struct queued_bios_work;
+
+ /* Chunks with outstanding reads */
+ mempool_t *tracked_chunk_pool;
+ spinlock_t tracked_chunk_lock;
+ struct hlist_head tracked_chunk_hash[DM_TRACKED_CHUNK_HASH_SIZE];
};
/*