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a9da0fb6d8
Also update target major version number. All info is (or will be) accessible through alternative interfaces (e.g. "dmsetup message", module params, etc). Signed-off-by: Mike Snitzer <snitzer@kernel.org> Signed-off-by: Ken Raeburn <raeburn@redhat.com> Signed-off-by: Matthew Sakai <msakai@redhat.com>
121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright 2023 Red Hat
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*/
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#ifndef VDO_DEDUPE_H
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#define VDO_DEDUPE_H
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#include <linux/list.h>
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#include <linux/timer.h>
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#include "indexer.h"
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#include "admin-state.h"
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#include "constants.h"
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#include "statistics.h"
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#include "types.h"
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#include "wait-queue.h"
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struct dedupe_context {
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struct hash_zone *zone;
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struct uds_request request;
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struct list_head list_entry;
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struct funnel_queue_entry queue_entry;
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u64 submission_jiffies;
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struct data_vio *requestor;
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atomic_t state;
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};
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struct hash_lock;
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struct hash_zone {
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/* Which hash zone this is */
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zone_count_t zone_number;
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/* The administrative state of the zone */
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struct admin_state state;
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/* The thread ID for this zone */
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thread_id_t thread_id;
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/* Mapping from record name fields to hash_locks */
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struct int_map *hash_lock_map;
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/* List containing all unused hash_locks */
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struct list_head lock_pool;
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/*
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* Statistics shared by all hash locks in this zone. Only modified on the hash zone thread,
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* but queried by other threads.
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*/
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struct hash_lock_statistics statistics;
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/* Array of all hash_locks */
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struct hash_lock *lock_array;
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/* These fields are used to manage the dedupe contexts */
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struct list_head available;
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struct list_head pending;
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struct funnel_queue *timed_out_complete;
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struct timer_list timer;
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struct vdo_completion completion;
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unsigned int active;
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atomic_t timer_state;
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/* The dedupe contexts for querying the index from this zone */
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struct dedupe_context contexts[MAXIMUM_VDO_USER_VIOS];
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};
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struct hash_zones;
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struct pbn_lock * __must_check vdo_get_duplicate_lock(struct data_vio *data_vio);
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void vdo_acquire_hash_lock(struct vdo_completion *completion);
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void vdo_continue_hash_lock(struct vdo_completion *completion);
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void vdo_release_hash_lock(struct data_vio *data_vio);
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void vdo_clean_failed_hash_lock(struct data_vio *data_vio);
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void vdo_share_compressed_write_lock(struct data_vio *data_vio,
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struct pbn_lock *pbn_lock);
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int __must_check vdo_make_hash_zones(struct vdo *vdo, struct hash_zones **zones_ptr);
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void vdo_free_hash_zones(struct hash_zones *zones);
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void vdo_drain_hash_zones(struct hash_zones *zones, struct vdo_completion *parent);
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void vdo_get_dedupe_statistics(struct hash_zones *zones, struct vdo_statistics *stats);
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struct hash_zone * __must_check vdo_select_hash_zone(struct hash_zones *zones,
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const struct uds_record_name *name);
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void vdo_dump_hash_zones(struct hash_zones *zones);
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const char *vdo_get_dedupe_index_state_name(struct hash_zones *zones);
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u64 vdo_get_dedupe_index_timeout_count(struct hash_zones *zones);
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int vdo_message_dedupe_index(struct hash_zones *zones, const char *name);
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void vdo_set_dedupe_state_normal(struct hash_zones *zones);
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void vdo_start_dedupe_index(struct hash_zones *zones, bool create_flag);
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void vdo_resume_hash_zones(struct hash_zones *zones, struct vdo_completion *parent);
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void vdo_finish_dedupe_index(struct hash_zones *zones);
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/* Interval (in milliseconds) from submission until switching to fast path and skipping UDS. */
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extern unsigned int vdo_dedupe_index_timeout_interval;
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/*
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* Minimum time interval (in milliseconds) between timer invocations to check for requests waiting
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* for UDS that should now time out.
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*/
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extern unsigned int vdo_dedupe_index_min_timer_interval;
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void vdo_set_dedupe_index_timeout_interval(unsigned int value);
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void vdo_set_dedupe_index_min_timer_interval(unsigned int value);
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#endif /* VDO_DEDUPE_H */
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