X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fmd%2Fdm-snap.h;h=f07315fe23621e706bae67ab240d2bb8d89c42d3;hb=765426e8ee4c0ab2bc9d44951f4865b8494cdbd0;hp=24f9fb73b982d0cd148ef15d56428ba6c7ce6877;hpb=77a50df2b14c8d3ee3c58c21c4a0e0157570df09;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/md/dm-snap.h b/drivers/md/dm-snap.h
index 24f9fb73b98..f07315fe236 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];
 };
 
 /*