linux/drivers/md/dm-vdo/dedupe.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright 2023 Red Hat
 */

#ifndef VDO_DEDUPE_H
#define VDO_DEDUPE_H

#include <linux/list.h>
#include <linux/timer.h>

#include "indexer.h"

#include "admin-state.h"
#include "constants.h"
#include "statistics.h"
#include "types.h"
#include "wait-queue.h"

struct dedupe_context { … };

struct hash_lock;

struct hash_zone { … };

struct hash_zones;

struct pbn_lock * __must_check vdo_get_duplicate_lock(struct data_vio *data_vio);

void vdo_acquire_hash_lock(struct vdo_completion *completion);
void vdo_continue_hash_lock(struct vdo_completion *completion);
void vdo_release_hash_lock(struct data_vio *data_vio);
void vdo_clean_failed_hash_lock(struct data_vio *data_vio);
void vdo_share_compressed_write_lock(struct data_vio *data_vio,
				     struct pbn_lock *pbn_lock);

int __must_check vdo_make_hash_zones(struct vdo *vdo, struct hash_zones **zones_ptr);

void vdo_free_hash_zones(struct hash_zones *zones);

void vdo_drain_hash_zones(struct hash_zones *zones, struct vdo_completion *parent);

void vdo_get_dedupe_statistics(struct hash_zones *zones, struct vdo_statistics *stats);

struct hash_zone * __must_check vdo_select_hash_zone(struct hash_zones *zones,
						     const struct uds_record_name *name);

void vdo_dump_hash_zones(struct hash_zones *zones);

const char *vdo_get_dedupe_index_state_name(struct hash_zones *zones);

u64 vdo_get_dedupe_index_timeout_count(struct hash_zones *zones);

int vdo_message_dedupe_index(struct hash_zones *zones, const char *name);

void vdo_set_dedupe_state_normal(struct hash_zones *zones);

void vdo_start_dedupe_index(struct hash_zones *zones, bool create_flag);

void vdo_resume_hash_zones(struct hash_zones *zones, struct vdo_completion *parent);

void vdo_finish_dedupe_index(struct hash_zones *zones);

/* Interval (in milliseconds) from submission until switching to fast path and skipping UDS. */
extern unsigned int vdo_dedupe_index_timeout_interval;

/*
 * Minimum time interval (in milliseconds) between timer invocations to check for requests waiting
 * for UDS that should now time out.
 */
extern unsigned int vdo_dedupe_index_min_timer_interval;

void vdo_set_dedupe_index_timeout_interval(unsigned int value);
void vdo_set_dedupe_index_min_timer_interval(unsigned int value);

#endif /* VDO_DEDUPE_H */