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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2008-08-08 16:21:02 -0400
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2008-08-08 16:21:02 -0400
commite4ddcb0a6bf04d53ce77b4eb87bbbb32c4261d11 (patch)
treed27d2fea50a384d97aa2d0cf5c8657c916f761d4 /drivers/md/dm-snap.h
parentf2afa7711f8585ffc088ba538b9a510e0d5dca12 (diff)
parent6e86841d05f371b5b9b86ce76c02aaee83352298 (diff)
Merge commit 'v2.6.27-rc1' into for-linus
Diffstat (limited to 'drivers/md/dm-snap.h')
-rw-r--r--drivers/md/dm-snap.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/md/dm-snap.h b/drivers/md/dm-snap.h
index 24f9fb73b98..292c15609ae 100644
--- a/drivers/md/dm-snap.h
+++ b/drivers/md/dm-snap.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;
@@ -157,6 +161,8 @@ struct dm_snapshot {
/* The last percentage we notified */
int last_percent;
+ mempool_t *pending_pool;
+
struct exception_table pending;
struct exception_table complete;
@@ -174,6 +180,11 @@ 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];
};
/*