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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright 2023 Red Hat4 */5 6#ifndef VDO_LOGICAL_ZONE_H7#define VDO_LOGICAL_ZONE_H8 9#include <linux/list.h>10 11#include "admin-state.h"12#include "int-map.h"13#include "types.h"14 15struct physical_zone;16 17struct logical_zone {18 /* The completion for flush notifications */19 struct vdo_completion completion;20 /* The owner of this zone */21 struct logical_zones *zones;22 /* Which logical zone this is */23 zone_count_t zone_number;24 /* The thread id for this zone */25 thread_id_t thread_id;26 /* In progress operations keyed by LBN */27 struct int_map *lbn_operations;28 /* The logical to physical map */29 struct block_map_zone *block_map_zone;30 /* The current flush generation */31 sequence_number_t flush_generation;32 /*33 * The oldest active generation in this zone. This is mutated only on the logical zone34 * thread but is queried from the flusher thread.35 */36 sequence_number_t oldest_active_generation;37 /* The number of IOs in the current flush generation */38 block_count_t ios_in_flush_generation;39 /* The youngest generation of the current notification */40 sequence_number_t notification_generation;41 /* Whether a notification is in progress */42 bool notifying;43 /* The queue of active data write VIOs */44 struct list_head write_vios;45 /* The administrative state of the zone */46 struct admin_state state;47 /* The physical zone from which to allocate */48 struct physical_zone *allocation_zone;49 /* The number of allocations done from the current allocation_zone */50 block_count_t allocation_count;51 /* The next zone */52 struct logical_zone *next;53};54 55struct logical_zones {56 /* The vdo whose zones these are */57 struct vdo *vdo;58 /* The manager for administrative actions */59 struct action_manager *manager;60 /* The number of zones */61 zone_count_t zone_count;62 /* The logical zones themselves */63 struct logical_zone zones[];64};65 66int __must_check vdo_make_logical_zones(struct vdo *vdo,67 struct logical_zones **zones_ptr);68 69void vdo_free_logical_zones(struct logical_zones *zones);70 71void vdo_drain_logical_zones(struct logical_zones *zones,72 const struct admin_state_code *operation,73 struct vdo_completion *completion);74 75void vdo_resume_logical_zones(struct logical_zones *zones,76 struct vdo_completion *parent);77 78void vdo_increment_logical_zone_flush_generation(struct logical_zone *zone,79 sequence_number_t expected_generation);80 81void vdo_acquire_flush_generation_lock(struct data_vio *data_vio);82 83void vdo_release_flush_generation_lock(struct data_vio *data_vio);84 85struct physical_zone * __must_check vdo_get_next_allocation_zone(struct logical_zone *zone);86 87void vdo_dump_logical_zone(const struct logical_zone *zone);88 89#endif /* VDO_LOGICAL_ZONE_H */90