diff options
| author | Joe Thornber <thornber@redhat.com> | 2011-10-31 20:19:11 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2011-10-31 20:19:11 +0000 |
| commit | 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4 (patch) | |
| tree | 499461f724d4db3d7118641f4a20f5be23549edd /drivers/md/persistent-data/dm-space-map-disk.h | |
| parent | 95d402f057f2e208e4631893f6cd4a59c7c05e41 (diff) | |
dm: add persistent data library
The persistent-data library offers a re-usable framework for the storage
and management of on-disk metadata in device-mapper targets.
It's used by the thin-provisioning target in the next patch and in an
upcoming hierarchical storage target.
For further information, please read
Documentation/device-mapper/persistent-data.txt
Signed-off-by: Joe Thornber <thornber@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/persistent-data/dm-space-map-disk.h')
| -rw-r--r-- | drivers/md/persistent-data/dm-space-map-disk.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/md/persistent-data/dm-space-map-disk.h b/drivers/md/persistent-data/dm-space-map-disk.h new file mode 100644 index 000000000000..447a0a9a2d9f --- /dev/null +++ b/drivers/md/persistent-data/dm-space-map-disk.h @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2011 Red Hat, Inc. + * + * This file is released under the GPL. + */ + +#ifndef _LINUX_DM_SPACE_MAP_DISK_H +#define _LINUX_DM_SPACE_MAP_DISK_H + +#include "dm-block-manager.h" + +struct dm_space_map; +struct dm_transaction_manager; + +/* + * Unfortunately we have to use two-phase construction due to the cycle + * between the tm and sm. + */ +struct dm_space_map *dm_sm_disk_create(struct dm_transaction_manager *tm, + dm_block_t nr_blocks); + +struct dm_space_map *dm_sm_disk_open(struct dm_transaction_manager *tm, + void *root, size_t len); + +#endif /* _LINUX_DM_SPACE_MAP_DISK_H */ |