3241b1d3e0
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>
34 lines
731 B
C
34 lines
731 B
C
/*
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* Copyright (C) 2011 Red Hat, Inc.
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*
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* This file is released under the GPL.
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*/
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#ifndef DM_SPACE_MAP_METADATA_H
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#define DM_SPACE_MAP_METADATA_H
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#include "dm-transaction-manager.h"
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/*
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* Unfortunately we have to use two-phase construction due to the cycle
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* between the tm and sm.
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*/
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struct dm_space_map *dm_sm_metadata_init(void);
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/*
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* Create a fresh space map.
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*/
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int dm_sm_metadata_create(struct dm_space_map *sm,
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struct dm_transaction_manager *tm,
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dm_block_t nr_blocks,
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dm_block_t superblock);
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/*
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* Open from a previously-recorded root.
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*/
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int dm_sm_metadata_open(struct dm_space_map *sm,
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struct dm_transaction_manager *tm,
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void *root_le, size_t len);
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#endif /* DM_SPACE_MAP_METADATA_H */
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