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dm snapshot: remove dm_snap header use

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Move useful functions out of dm-snap.h and stop using dm-snap.h.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Jonathan Brassow
2009-04-02 19:55:33 +01:00
committed by Alasdair G Kergon
parent 49beb2b87a
commit 71fab00a6b
5 changed files with 54 additions and 57 deletions
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16
drivers/md/dm-exception-store.h
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@@ -97,8 +97,6 @@ struct dm_exception_store {
struct dm_exception_store_type *type;
struct dm_target *ti;
struct dm_snapshot *snap;
struct dm_dev *cow;
/* Size of data blocks saved - must be a power of 2 */
@@ -152,6 +150,20 @@ static inline void dm_consecutive_chunk_count_inc(struct dm_snap_exception *e)
# endif
/*
* 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_exception_store *store,
sector_t sector)
{
return (sector & ~store->chunk_mask) >> store->chunk_shift;
}
int dm_exception_store_type_register(struct dm_exception_store_type *type);
int dm_exception_store_type_unregister(struct dm_exception_store_type *type);