diff options
Diffstat (limited to 'drivers/md/dm.h')
| -rw-r--r-- | drivers/md/dm.h | 76 |
1 files changed, 49 insertions, 27 deletions
diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 9013dc1a7b00..7a795979ec72 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -20,6 +20,7 @@ #include <linux/completion.h> #include <linux/kobject.h> #include <linux/refcount.h> +#include <linux/log2.h> #include "dm-stats.h" @@ -48,14 +49,16 @@ struct dm_md_mempools; struct dm_target_io; struct dm_io; -/*----------------------------------------------------------------- +/* + *--------------------------------------------------------------- * Internal table functions. - *---------------------------------------------------------------*/ + *--------------------------------------------------------------- + */ void dm_table_event_callback(struct dm_table *t, void (*fn)(void *), void *context); -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); bool dm_table_has_no_data_devices(struct dm_table *table); +bool dm_table_is_wildcard(struct dm_table *t); int dm_calculate_queue_limits(struct dm_table *table, struct queue_limits *limits); int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, @@ -69,14 +72,12 @@ enum dm_queue_mode dm_table_get_type(struct dm_table *t); struct target_type *dm_table_get_immutable_target_type(struct dm_table *t); struct dm_target *dm_table_get_immutable_target(struct dm_table *t); struct dm_target *dm_table_get_wildcard_target(struct dm_table *t); -bool dm_table_bio_based(struct dm_table *t); bool dm_table_request_based(struct dm_table *t); -void dm_table_free_md_mempools(struct dm_table *t); -struct dm_md_mempools *dm_table_get_md_mempools(struct dm_table *t); +bool dm_table_supports_size_change(struct dm_table *t, sector_t old_size, + sector_t new_size); void dm_lock_md_type(struct mapped_device *md); void dm_unlock_md_type(struct mapped_device *md); -void dm_set_md_type(struct mapped_device *md, enum dm_queue_mode type); enum dm_queue_mode dm_get_md_type(struct mapped_device *md); struct target_type *dm_get_immutable_target_type(struct mapped_device *md); @@ -101,30 +102,34 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t); /* * Zoned targets related functions. */ -int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q); +int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q, + struct queue_limits *lim); +int dm_revalidate_zones(struct dm_table *t, struct request_queue *q); +void dm_finalize_zone_settings(struct dm_table *t, struct queue_limits *lim); void dm_zone_endio(struct dm_io *io, struct bio *clone); #ifdef CONFIG_BLK_DEV_ZONED -void dm_cleanup_zoned_dev(struct mapped_device *md); int dm_blk_report_zones(struct gendisk *disk, sector_t sector, - unsigned int nr_zones, report_zones_cb cb, void *data); + unsigned int nr_zones, + struct blk_report_zones_args *args); bool dm_is_zone_write(struct mapped_device *md, struct bio *bio); -int dm_zone_map_bio(struct dm_target_io *io); +int dm_zone_get_reset_bitmap(struct mapped_device *md, struct dm_table *t, + sector_t sector, unsigned int nr_zones, + unsigned long *need_reset); +#define dm_has_zone_plugs(md) ((md)->disk->zone_wplugs_hash != NULL) #else -static inline void dm_cleanup_zoned_dev(struct mapped_device *md) {} #define dm_blk_report_zones NULL static inline bool dm_is_zone_write(struct mapped_device *md, struct bio *bio) { return false; } -static inline int dm_zone_map_bio(struct dm_target_io *tio) -{ - return DM_MAPIO_KILL; -} +#define dm_has_zone_plugs(md) false #endif -/*----------------------------------------------------------------- +/* + *--------------------------------------------------------------- * A registry of target types. - *---------------------------------------------------------------*/ + *--------------------------------------------------------------- + */ int dm_target_init(void); void dm_target_exit(void); struct target_type *dm_get_target_type(const char *name); @@ -186,9 +191,11 @@ void dm_kobject_release(struct kobject *kobj); /* * Targets for linear and striped mappings */ +int linear_map(struct dm_target *ti, struct bio *bio); int dm_linear_init(void); void dm_linear_exit(void); +int stripe_map(struct dm_target *ti, struct bio *bio); int dm_stripe_init(void); void dm_stripe_exit(void); @@ -201,15 +208,12 @@ int dm_open_count(struct mapped_device *md); int dm_lock_for_deletion(struct mapped_device *md, bool mark_deferred, bool only_deferred); int dm_cancel_deferred_remove(struct mapped_device *md); int dm_request_based(struct mapped_device *md); -int dm_get_table_device(struct mapped_device *md, dev_t dev, fmode_t mode, +int dm_get_table_device(struct mapped_device *md, dev_t dev, blk_mode_t mode, struct dm_dev **result); void dm_put_table_device(struct mapped_device *md, struct dm_dev *d); int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action, - unsigned cookie); - -void dm_internal_suspend(struct mapped_device *md); -void dm_internal_resume(struct mapped_device *md); + unsigned int cookie, bool need_resize_uevent); int dm_io_init(void); void dm_io_exit(void); @@ -220,14 +224,32 @@ void dm_kcopyd_exit(void); /* * Mempool operations */ -struct dm_md_mempools *dm_alloc_md_mempools(struct mapped_device *md, enum dm_queue_mode type, - unsigned integrity, unsigned per_bio_data_size, - unsigned min_pool_size); void dm_free_md_mempools(struct dm_md_mempools *pools); /* * Various helpers */ -unsigned dm_get_reserved_bio_based_ios(void); +unsigned int dm_get_reserved_bio_based_ios(void); + +#define DM_HASH_LOCKS_MAX 64 + +static inline unsigned int dm_num_hash_locks(void) +{ + unsigned int num_locks = roundup_pow_of_two(num_online_cpus()) << 1; + + return min_t(unsigned int, num_locks, DM_HASH_LOCKS_MAX); +} + +#define DM_HASH_LOCKS_MULT 4294967291ULL +#define DM_HASH_LOCKS_SHIFT 6 + +static inline unsigned int dm_hash_locks_index(sector_t block, + unsigned int num_locks) +{ + sector_t h1 = (block * DM_HASH_LOCKS_MULT) >> DM_HASH_LOCKS_SHIFT; + sector_t h2 = h1 >> DM_HASH_LOCKS_SHIFT; + + return (h1 ^ h2) & (num_locks - 1); +} #endif |