/* SPDX-License-Identifier: GPL-2.0-or-later */#ifndef _DM_PCACHE_H#define _DM_PCACHE_H#include <linux/device-mapper.h> #include "../dm-core.h" #define CACHE_DEV_TO_PCACHE(cache_dev)		(container_of(cache_dev, struct dm_pcache, cache_dev))#define BACKING_DEV_TO_PCACHE(backing_dev)	(container_of(backing_dev, struct dm_pcache, backing_dev))#define CACHE_TO_PCACHE(cache)			(container_of(cache, struct dm_pcache, cache)) #define PCACHE_STATE_RUNNING			1#define PCACHE_STATE_STOPPING			2 struct pcache_cache_dev;struct pcache_backing_dev;struct pcache_cache;struct pcache_cache_options;struct dm_pcache {	struct dm_target *ti;	struct pcache_cache_dev cache_dev;	struct pcache_backing_dev backing_dev;	struct pcache_cache cache;	struct pcache_cache_options opts; 	spinlock_t			defered_req_list_lock;	struct list_head		defered_req_list;	struct workqueue_struct		*task_wq; 	struct work_struct		defered_req_work; 	atomic_t			state;	atomic_t			inflight_reqs;	wait_queue_head_t		inflight_wq;}; static inline bool pcache_is_stopping(struct dm_pcache *pcache){	return (atomic_read(&pcache->state) == PCACHE_STATE_STOPPING);} #define pcache_dev_err(pcache, fmt, ...)							\	pcache_err("%s " fmt, pcache->ti->table->md->name, ##__VA_ARGS__)#define pcache_dev_info(pcache, fmt, ...)							\	pcache_info("%s " fmt, pcache->ti->table->md->name, ##__VA_ARGS__)#define pcache_dev_debug(pcache, fmt, ...)							\	pcache_debug("%s " fmt, pcache->ti->table->md->name, ##__VA_ARGS__) struct pcache_request {	struct dm_pcache	*pcache;	struct bio		*bio; 	u64			off;	u32			data_len; 	struct kref		ref;	int			ret; 	struct list_head	list_node;}; void pcache_req_get(struct pcache_request *pcache_req);void pcache_req_put(struct pcache_request *pcache_req, int ret); void pcache_defer_reqs_kick(struct dm_pcache *pcache); #endif /* _DM_PCACHE_H */