mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
b712287398
Instead of calculating the zone index by the offset within the zone array store the index within the structure itself. With that the helper dmz_id() is pointless and can be replaced with accessing the ->id value directly. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Bob Liu <bob.liu@oracle.com> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
266 lines
7.5 KiB
C
266 lines
7.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2017 Western Digital Corporation or its affiliates.
|
|
*
|
|
* This file is released under the GPL.
|
|
*/
|
|
|
|
#ifndef DM_ZONED_H
|
|
#define DM_ZONED_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/device-mapper.h>
|
|
#include <linux/dm-kcopyd.h>
|
|
#include <linux/list.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/rbtree.h>
|
|
#include <linux/radix-tree.h>
|
|
#include <linux/shrinker.h>
|
|
|
|
/*
|
|
* dm-zoned creates block devices with 4KB blocks, always.
|
|
*/
|
|
#define DMZ_BLOCK_SHIFT 12
|
|
#define DMZ_BLOCK_SIZE (1 << DMZ_BLOCK_SHIFT)
|
|
#define DMZ_BLOCK_MASK (DMZ_BLOCK_SIZE - 1)
|
|
|
|
#define DMZ_BLOCK_SHIFT_BITS (DMZ_BLOCK_SHIFT + 3)
|
|
#define DMZ_BLOCK_SIZE_BITS (1 << DMZ_BLOCK_SHIFT_BITS)
|
|
#define DMZ_BLOCK_MASK_BITS (DMZ_BLOCK_SIZE_BITS - 1)
|
|
|
|
#define DMZ_BLOCK_SECTORS_SHIFT (DMZ_BLOCK_SHIFT - SECTOR_SHIFT)
|
|
#define DMZ_BLOCK_SECTORS (DMZ_BLOCK_SIZE >> SECTOR_SHIFT)
|
|
#define DMZ_BLOCK_SECTORS_MASK (DMZ_BLOCK_SECTORS - 1)
|
|
|
|
/*
|
|
* 4KB block <-> 512B sector conversion.
|
|
*/
|
|
#define dmz_blk2sect(b) ((sector_t)(b) << DMZ_BLOCK_SECTORS_SHIFT)
|
|
#define dmz_sect2blk(s) ((sector_t)(s) >> DMZ_BLOCK_SECTORS_SHIFT)
|
|
|
|
#define dmz_bio_block(bio) dmz_sect2blk((bio)->bi_iter.bi_sector)
|
|
#define dmz_bio_blocks(bio) dmz_sect2blk(bio_sectors(bio))
|
|
|
|
/*
|
|
* Zoned block device information.
|
|
*/
|
|
struct dmz_dev {
|
|
struct block_device *bdev;
|
|
|
|
char name[BDEVNAME_SIZE];
|
|
|
|
sector_t capacity;
|
|
|
|
unsigned int nr_zones;
|
|
|
|
unsigned int flags;
|
|
|
|
sector_t zone_nr_sectors;
|
|
unsigned int zone_nr_sectors_shift;
|
|
|
|
sector_t zone_nr_blocks;
|
|
sector_t zone_nr_blocks_shift;
|
|
};
|
|
|
|
#define dmz_bio_chunk(dev, bio) ((bio)->bi_iter.bi_sector >> \
|
|
(dev)->zone_nr_sectors_shift)
|
|
#define dmz_chunk_block(dev, b) ((b) & ((dev)->zone_nr_blocks - 1))
|
|
|
|
/* Device flags. */
|
|
#define DMZ_BDEV_DYING (1 << 0)
|
|
#define DMZ_CHECK_BDEV (2 << 0)
|
|
|
|
/*
|
|
* Zone descriptor.
|
|
*/
|
|
struct dm_zone {
|
|
/* For listing the zone depending on its state */
|
|
struct list_head link;
|
|
|
|
/* Zone type and state */
|
|
unsigned long flags;
|
|
|
|
/* Zone activation reference count */
|
|
atomic_t refcount;
|
|
|
|
/* Zone id */
|
|
unsigned int id;
|
|
|
|
/* Zone write pointer block (relative to the zone start block) */
|
|
unsigned int wp_block;
|
|
|
|
/* Zone weight (number of valid blocks in the zone) */
|
|
unsigned int weight;
|
|
|
|
/* The chunk that the zone maps */
|
|
unsigned int chunk;
|
|
|
|
/*
|
|
* For a sequential data zone, pointer to the random zone
|
|
* used as a buffer for processing unaligned writes.
|
|
* For a buffer zone, this points back to the data zone.
|
|
*/
|
|
struct dm_zone *bzone;
|
|
};
|
|
|
|
/*
|
|
* Zone flags.
|
|
*/
|
|
enum {
|
|
/* Zone write type */
|
|
DMZ_RND,
|
|
DMZ_SEQ,
|
|
|
|
/* Zone critical condition */
|
|
DMZ_OFFLINE,
|
|
DMZ_READ_ONLY,
|
|
|
|
/* How the zone is being used */
|
|
DMZ_META,
|
|
DMZ_DATA,
|
|
DMZ_BUF,
|
|
|
|
/* Zone internal state */
|
|
DMZ_RECLAIM,
|
|
DMZ_SEQ_WRITE_ERR,
|
|
};
|
|
|
|
/*
|
|
* Zone data accessors.
|
|
*/
|
|
#define dmz_is_rnd(z) test_bit(DMZ_RND, &(z)->flags)
|
|
#define dmz_is_seq(z) test_bit(DMZ_SEQ, &(z)->flags)
|
|
#define dmz_is_empty(z) ((z)->wp_block == 0)
|
|
#define dmz_is_offline(z) test_bit(DMZ_OFFLINE, &(z)->flags)
|
|
#define dmz_is_readonly(z) test_bit(DMZ_READ_ONLY, &(z)->flags)
|
|
#define dmz_in_reclaim(z) test_bit(DMZ_RECLAIM, &(z)->flags)
|
|
#define dmz_seq_write_err(z) test_bit(DMZ_SEQ_WRITE_ERR, &(z)->flags)
|
|
|
|
#define dmz_is_meta(z) test_bit(DMZ_META, &(z)->flags)
|
|
#define dmz_is_buf(z) test_bit(DMZ_BUF, &(z)->flags)
|
|
#define dmz_is_data(z) test_bit(DMZ_DATA, &(z)->flags)
|
|
|
|
#define dmz_weight(z) ((z)->weight)
|
|
|
|
/*
|
|
* Message functions.
|
|
*/
|
|
#define dmz_dev_info(dev, format, args...) \
|
|
DMINFO("(%s): " format, (dev)->name, ## args)
|
|
|
|
#define dmz_dev_err(dev, format, args...) \
|
|
DMERR("(%s): " format, (dev)->name, ## args)
|
|
|
|
#define dmz_dev_warn(dev, format, args...) \
|
|
DMWARN("(%s): " format, (dev)->name, ## args)
|
|
|
|
#define dmz_dev_debug(dev, format, args...) \
|
|
DMDEBUG("(%s): " format, (dev)->name, ## args)
|
|
|
|
struct dmz_metadata;
|
|
struct dmz_reclaim;
|
|
|
|
/*
|
|
* Functions defined in dm-zoned-metadata.c
|
|
*/
|
|
int dmz_ctr_metadata(struct dmz_dev *dev, struct dmz_metadata **zmd);
|
|
void dmz_dtr_metadata(struct dmz_metadata *zmd);
|
|
int dmz_resume_metadata(struct dmz_metadata *zmd);
|
|
|
|
void dmz_lock_map(struct dmz_metadata *zmd);
|
|
void dmz_unlock_map(struct dmz_metadata *zmd);
|
|
void dmz_lock_metadata(struct dmz_metadata *zmd);
|
|
void dmz_unlock_metadata(struct dmz_metadata *zmd);
|
|
void dmz_lock_flush(struct dmz_metadata *zmd);
|
|
void dmz_unlock_flush(struct dmz_metadata *zmd);
|
|
int dmz_flush_metadata(struct dmz_metadata *zmd);
|
|
|
|
sector_t dmz_start_sect(struct dmz_metadata *zmd, struct dm_zone *zone);
|
|
sector_t dmz_start_block(struct dmz_metadata *zmd, struct dm_zone *zone);
|
|
unsigned int dmz_nr_chunks(struct dmz_metadata *zmd);
|
|
|
|
#define DMZ_ALLOC_RND 0x01
|
|
#define DMZ_ALLOC_RECLAIM 0x02
|
|
|
|
struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd, unsigned long flags);
|
|
void dmz_free_zone(struct dmz_metadata *zmd, struct dm_zone *zone);
|
|
|
|
void dmz_map_zone(struct dmz_metadata *zmd, struct dm_zone *zone,
|
|
unsigned int chunk);
|
|
void dmz_unmap_zone(struct dmz_metadata *zmd, struct dm_zone *zone);
|
|
unsigned int dmz_nr_zones(struct dmz_metadata *zmd);
|
|
unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd);
|
|
unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd);
|
|
unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd);
|
|
unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd);
|
|
|
|
/*
|
|
* Activate a zone (increment its reference count).
|
|
*/
|
|
static inline void dmz_activate_zone(struct dm_zone *zone)
|
|
{
|
|
atomic_inc(&zone->refcount);
|
|
}
|
|
|
|
/*
|
|
* Deactivate a zone. This decrement the zone reference counter
|
|
* indicating that all BIOs to the zone have completed when the count is 0.
|
|
*/
|
|
static inline void dmz_deactivate_zone(struct dm_zone *zone)
|
|
{
|
|
atomic_dec(&zone->refcount);
|
|
}
|
|
|
|
/*
|
|
* Test if a zone is active, that is, has a refcount > 0.
|
|
*/
|
|
static inline bool dmz_is_active(struct dm_zone *zone)
|
|
{
|
|
return atomic_read(&zone->refcount);
|
|
}
|
|
|
|
int dmz_lock_zone_reclaim(struct dm_zone *zone);
|
|
void dmz_unlock_zone_reclaim(struct dm_zone *zone);
|
|
struct dm_zone *dmz_get_zone_for_reclaim(struct dmz_metadata *zmd);
|
|
|
|
struct dm_zone *dmz_get_chunk_mapping(struct dmz_metadata *zmd,
|
|
unsigned int chunk, int op);
|
|
void dmz_put_chunk_mapping(struct dmz_metadata *zmd, struct dm_zone *zone);
|
|
struct dm_zone *dmz_get_chunk_buffer(struct dmz_metadata *zmd,
|
|
struct dm_zone *dzone);
|
|
|
|
int dmz_validate_blocks(struct dmz_metadata *zmd, struct dm_zone *zone,
|
|
sector_t chunk_block, unsigned int nr_blocks);
|
|
int dmz_invalidate_blocks(struct dmz_metadata *zmd, struct dm_zone *zone,
|
|
sector_t chunk_block, unsigned int nr_blocks);
|
|
int dmz_block_valid(struct dmz_metadata *zmd, struct dm_zone *zone,
|
|
sector_t chunk_block);
|
|
int dmz_first_valid_block(struct dmz_metadata *zmd, struct dm_zone *zone,
|
|
sector_t *chunk_block);
|
|
int dmz_copy_valid_blocks(struct dmz_metadata *zmd, struct dm_zone *from_zone,
|
|
struct dm_zone *to_zone);
|
|
int dmz_merge_valid_blocks(struct dmz_metadata *zmd, struct dm_zone *from_zone,
|
|
struct dm_zone *to_zone, sector_t chunk_block);
|
|
|
|
/*
|
|
* Functions defined in dm-zoned-reclaim.c
|
|
*/
|
|
int dmz_ctr_reclaim(struct dmz_dev *dev, struct dmz_metadata *zmd,
|
|
struct dmz_reclaim **zrc);
|
|
void dmz_dtr_reclaim(struct dmz_reclaim *zrc);
|
|
void dmz_suspend_reclaim(struct dmz_reclaim *zrc);
|
|
void dmz_resume_reclaim(struct dmz_reclaim *zrc);
|
|
void dmz_reclaim_bio_acc(struct dmz_reclaim *zrc);
|
|
void dmz_schedule_reclaim(struct dmz_reclaim *zrc);
|
|
|
|
/*
|
|
* Functions defined in dm-zoned-target.c
|
|
*/
|
|
bool dmz_bdev_is_dying(struct dmz_dev *dmz_dev);
|
|
bool dmz_check_bdev(struct dmz_dev *dmz_dev);
|
|
|
|
#endif /* DM_ZONED_H */
|