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Diffstat (limited to 'drivers/md/dm-snap.h')
-rw-r--r--drivers/md/dm-snap.h105
1 files changed, 0 insertions, 105 deletions
diff --git a/drivers/md/dm-snap.h b/drivers/md/dm-snap.h
deleted file mode 100644
index d9e62b43cf85..000000000000
--- a/drivers/md/dm-snap.h
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright (C) 2001-2002 Sistina Software (UK) Limited.
- *
- * This file is released under the GPL.
- */
-
-#ifndef DM_SNAPSHOT_H
-#define DM_SNAPSHOT_H
-
-#include <linux/device-mapper.h>
-#include "dm-exception-store.h"
-#include "dm-bio-list.h"
-#include <linux/blkdev.h>
-#include <linux/workqueue.h>
-
-struct exception_table {
- uint32_t hash_mask;
- unsigned hash_shift;
- struct list_head *table;
-};
-
-#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;
-
- struct dm_dev *origin;
- struct dm_dev *cow;
-
- /* List of snapshots per Origin */
- struct list_head list;
-
- /* Size of data blocks saved - must be a power of 2 */
- chunk_t chunk_size;
- chunk_t chunk_mask;
- chunk_t chunk_shift;
-
- /* You can't use a snapshot if this is 0 (e.g. if full) */
- int valid;
-
- /* Origin writes don't trigger exceptions until this is set */
- int active;
-
- /* Used for display of table */
- char type;
-
- mempool_t *pending_pool;
-
- atomic_t pending_exceptions_count;
-
- 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 dm_exception_store store;
-
- struct dm_kcopyd_client *kcopyd_client;
-
- /* 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];
-};
-
-/*
- * Return the number of sectors in the device.
- */
-static inline sector_t get_dev_size(struct block_device *bdev)
-{
- return bdev->bd_inode->i_size >> SECTOR_SHIFT;
-}
-
-static inline chunk_t sector_to_chunk(struct dm_snapshot *s, sector_t sector)
-{
- return (sector & ~s->chunk_mask) >> s->chunk_shift;
-}
-
-static inline sector_t chunk_to_sector(struct dm_snapshot *s, chunk_t chunk)
-{
- return chunk << s->chunk_shift;
-}
-
-static inline int bdev_equal(struct block_device *lhs, struct block_device *rhs)
-{
- /*
- * There is only ever one instance of a particular block
- * device so we can compare pointers safely.
- */
- return lhs == rhs;
-}
-
-#endif