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dm exception store: introduce registry

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Move exception stores into a registry.

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 19:55:31 +01:00
committed by Alasdair G Kergon
parent 7513c2a761
commit 493df71c64
6 changed files with 307 additions and 49 deletions
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19
drivers/md/dm-exception-store.h
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@ -39,6 +39,9 @@ struct dm_snap_exception {
*/
struct dm_exception_store;
struct dm_exception_store_type {
const char *name;
struct module *module;
int (*ctr) (struct dm_exception_store *store,
unsigned argc, char **argv);
@ -85,10 +88,13 @@ struct dm_exception_store_type {
void (*fraction_full) (struct dm_exception_store *store,
sector_t *numerator,
sector_t *denominator);
/* For internal device-mapper use only. */
struct list_head list;
};
struct dm_exception_store {
struct dm_exception_store_type type;
struct dm_exception_store_type *type;
struct dm_snapshot *snap;
@ -138,6 +144,13 @@ static inline void dm_consecutive_chunk_count_inc(struct dm_snap_exception *e)
# endif
int dm_exception_store_type_register(struct dm_exception_store_type *type);
int dm_exception_store_type_unregister(struct dm_exception_store_type *type);
int dm_exception_store_create(const char *type_name,
struct dm_exception_store **store);
void dm_exception_store_destroy(struct dm_exception_store *store);
int dm_exception_store_init(void);
void dm_exception_store_exit(void);
@ -150,8 +163,4 @@ void dm_persistent_snapshot_exit(void);
int dm_transient_snapshot_init(void);
void dm_transient_snapshot_exit(void);
int dm_create_persistent(struct dm_exception_store *store);
int dm_create_transient(struct dm_exception_store *store);
#endif /* _LINUX_DM_EXCEPTION_STORE */