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dm persistent data: tidy transaction manager creation fns

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Tidy the transaction manager creation functions.

They no longer lock the superblock.  Superblock locking is pulled out to
the caller.

Also export dm_bm_write_lock_zero.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Joe Thornber
2012-07-27 15:08:09 +01:00
committed by Alasdair G Kergon
parent eb04cf634f
commit 384ef0e62e
4 changed files with 48 additions and 57 deletions
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11
drivers/md/persistent-data/dm-transaction-manager.h
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@@ -115,16 +115,17 @@ struct dm_block_manager *dm_tm_get_bm(struct dm_transaction_manager *tm);
*
* Returns a tm that has an open transaction to write the new disk sm.
* Caller should store the new sm root and commit.
*
* The superblock location is passed so the metadata space map knows it
* shouldn't be used.
*/
int dm_tm_create_with_sm(struct dm_block_manager *bm, dm_block_t sb_location,
struct dm_block_validator *sb_validator,
struct dm_transaction_manager **tm,
struct dm_space_map **sm, struct dm_block **sblock);
struct dm_space_map **sm);
int dm_tm_open_with_sm(struct dm_block_manager *bm, dm_block_t sb_location,
struct dm_block_validator *sb_validator,
size_t root_offset, size_t root_max_len,
void *sm_root, size_t root_len,
struct dm_transaction_manager **tm,
struct dm_space_map **sm, struct dm_block **sblock);
struct dm_space_map **sm);
#endif /* _LINUX_DM_TRANSACTION_MANAGER_H */