diff options
| -rw-r--r-- | drivers/md/dm.c | 12 | ||||
| -rw-r--r-- | drivers/md/dm.h | 75 | ||||
| -rw-r--r-- | include/linux/device-mapper.h | 104 |
3 files changed, 109 insertions, 82 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 59bf797de9a5..952c49c3b9aa 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -50,9 +50,9 @@ struct target_io { union map_info *dm_get_mapinfo(struct bio *bio) { - if (bio && bio->bi_private) - return &((struct target_io *)bio->bi_private)->info; - return NULL; + if (bio && bio->bi_private) + return &((struct target_io *)bio->bi_private)->info; + return NULL; } #define MINOR_ALLOCED ((void *)-1) @@ -474,8 +474,8 @@ static void __map_bio(struct dm_target *ti, struct bio *clone, if (r > 0) { /* the bio has been remapped so dispatch it */ - blk_add_trace_remap(bdev_get_queue(clone->bi_bdev), clone, - tio->io->bio->bi_bdev->bd_dev, sector, + blk_add_trace_remap(bdev_get_queue(clone->bi_bdev), clone, + tio->io->bio->bi_bdev->bd_dev, sector, clone->bi_sector); generic_make_request(clone); @@ -1042,7 +1042,7 @@ static struct mapped_device *dm_find_md(dev_t dev) md = idr_find(&_minor_idr, minor); if (md && (md == MINOR_ALLOCED || (dm_disk(md)->first_minor != minor) || - test_bit(DMF_FREEING, &md->flags))) { + test_bit(DMF_FREEING, &md->flags))) { md = NULL; goto out; } diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 2901ab943191..71ddd1e23007 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -39,88 +39,16 @@ struct dm_dev { }; struct dm_table; -struct mapped_device; /*----------------------------------------------------------------- - * Functions for manipulating a struct mapped_device. - * Drop the reference with dm_put when you finish with the object. + * Internal table functions. *---------------------------------------------------------------*/ - -/* - * DM_ANY_MINOR allocates any available minor number. - */ -#define DM_ANY_MINOR (-1) -int dm_create(int minor, struct mapped_device **md); - -void dm_set_mdptr(struct mapped_device *md, void *ptr); -void *dm_get_mdptr(struct mapped_device *md); - -/* - * Reference counting for md. - */ -void dm_get(struct mapped_device *md); -struct mapped_device *dm_get_md(dev_t dev); -void dm_put(struct mapped_device *md); - -/* - * A device can still be used while suspended, but I/O is deferred. - */ -int dm_suspend(struct mapped_device *md, int with_lockfs); -int dm_resume(struct mapped_device *md); - -/* - * The device must be suspended before calling this method. - */ -int dm_swap_table(struct mapped_device *md, struct dm_table *t); - -/* - * Drop a reference on the table when you've finished with the - * result. - */ -struct dm_table *dm_get_table(struct mapped_device *md); - -/* - * Event functions. - */ -uint32_t dm_get_event_nr(struct mapped_device *md); -int dm_wait_event(struct mapped_device *md, int event_nr); - -/* - * Info functions. - */ -struct gendisk *dm_disk(struct mapped_device *md); -int dm_suspended(struct mapped_device *md); - -/* - * Geometry functions. - */ -int dm_get_geometry(struct mapped_device *md, struct hd_geometry *geo); -int dm_set_geometry(struct mapped_device *md, struct hd_geometry *geo); - -/*----------------------------------------------------------------- - * Functions for manipulating a table. Tables are also reference - * counted. - *---------------------------------------------------------------*/ -int dm_table_create(struct dm_table **result, int mode, - unsigned num_targets, struct mapped_device *md); - -void dm_table_get(struct dm_table *t); -void dm_table_put(struct dm_table *t); - -int dm_table_add_target(struct dm_table *t, const char *type, - sector_t start, sector_t len, char *params); -int dm_table_complete(struct dm_table *t); void dm_table_event_callback(struct dm_table *t, void (*fn)(void *), void *context); -void dm_table_event(struct dm_table *t); -sector_t dm_table_get_size(struct dm_table *t); struct dm_target *dm_table_get_target(struct dm_table *t, unsigned int index); struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector); void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q); -unsigned int dm_table_get_num_targets(struct dm_table *t); struct list_head *dm_table_get_devices(struct dm_table *t); -int dm_table_get_mode(struct dm_table *t); -struct mapped_device *dm_table_get_md(struct dm_table *t); void dm_table_presuspend_targets(struct dm_table *t); void dm_table_postsuspend_targets(struct dm_table *t); void dm_table_resume_targets(struct dm_table *t); @@ -138,7 +66,6 @@ void dm_put_target_type(struct target_type *t); int dm_target_iterate(void (*iter_func)(struct target_type *tt, void *param), void *param); - /*----------------------------------------------------------------- * Useful inlines. *---------------------------------------------------------------*/ diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index aee10b2ea4c6..010c8c5eeb37 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -8,9 +8,12 @@ #ifndef _LINUX_DEVICE_MAPPER_H #define _LINUX_DEVICE_MAPPER_H +#ifdef __KERNEL__ + struct dm_target; struct dm_table; struct dm_dev; +struct mapped_device; typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t; @@ -78,7 +81,7 @@ void dm_put_device(struct dm_target *ti, struct dm_dev *d); struct target_type { const char *name; struct module *module; - unsigned version[3]; + unsigned version[3]; dm_ctr_fn ctr; dm_dtr_fn dtr; dm_map_fn map; @@ -128,4 +131,101 @@ struct dm_target { int dm_register_target(struct target_type *t); int dm_unregister_target(struct target_type *t); -#endif /* _LINUX_DEVICE_MAPPER_H */ + +/*----------------------------------------------------------------- + * Functions for creating and manipulating mapped devices. + * Drop the reference with dm_put when you finish with the object. + *---------------------------------------------------------------*/ + +/* + * DM_ANY_MINOR chooses the next available minor number. + */ +#define DM_ANY_MINOR (-1) +int dm_create(int minor, struct mapped_device **md); + +/* + * Reference counting for md. + */ +struct mapped_device *dm_get_md(dev_t dev); +void dm_get(struct mapped_device *md); +void dm_put(struct mapped_device *md); + +/* + * An arbitrary pointer may be stored alongside a mapped device. + */ +void dm_set_mdptr(struct mapped_device *md, void *ptr); +void *dm_get_mdptr(struct mapped_device *md); + +/* + * A device can still be used while suspended, but I/O is deferred. + */ +int dm_suspend(struct mapped_device *md, int with_lockfs); +int dm_resume(struct mapped_device *md); + +/* + * Event functions. + */ +uint32_t dm_get_event_nr(struct mapped_device *md); +int dm_wait_event(struct mapped_device *md, int event_nr); + +/* + * Info functions. + */ +struct gendisk *dm_disk(struct mapped_device *md); +int dm_suspended(struct mapped_device *md); + +/* + * Geometry functions. + */ +int dm_get_geometry(struct mapped_device *md, struct hd_geometry *geo); +int dm_set_geometry(struct mapped_device *md, struct hd_geometry *geo); + + +/*----------------------------------------------------------------- + * Functions for manipulating device-mapper tables. + *---------------------------------------------------------------*/ + +/* + * First create an empty table. + */ +int dm_table_create(struct dm_table **result, int mode, + unsigned num_targets, struct mapped_device *md); + +/* + * Then call this once for each target. + */ +int dm_table_add_target(struct dm_table *t, const char *type, + sector_t start, sector_t len, char *params); + +/* + * Finally call this to make the table ready for use. + */ +int dm_table_complete(struct dm_table *t); + +/* + * Table reference counting. + */ +struct dm_table *dm_get_table(struct mapped_device *md); +void dm_table_get(struct dm_table *t); +void dm_table_put(struct dm_table *t); + +/* + * Queries + */ +sector_t dm_table_get_size(struct dm_table *t); +unsigned int dm_table_get_num_targets(struct dm_table *t); +int dm_table_get_mode(struct dm_table *t); +struct mapped_device *dm_table_get_md(struct dm_table *t); + +/* + * Trigger an event. + */ +void dm_table_event(struct dm_table *t); + +/* + * The device must be suspended before calling this method. + */ +int dm_swap_table(struct mapped_device *md, struct dm_table *t); + +#endif /* __KERNEL__ */ +#endif /* _LINUX_DEVICE_MAPPER_H */ |