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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768/* 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 */