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-rw-r--r--drivers/md/dm-vdo/logical-zone.h89
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/md/dm-vdo/logical-zone.h b/drivers/md/dm-vdo/logical-zone.h
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index 0000000000..1b666c84a1
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+++ b/drivers/md/dm-vdo/logical-zone.h
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+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2023 Red Hat
+ */
+
+#ifndef VDO_LOGICAL_ZONE_H
+#define VDO_LOGICAL_ZONE_H
+
+#include <linux/list.h>
+
+#include "admin-state.h"
+#include "int-map.h"
+#include "types.h"
+
+struct physical_zone;
+
+struct logical_zone {
+ /* The completion for flush notifications */
+ struct vdo_completion completion;
+ /* The owner of this zone */
+ struct logical_zones *zones;
+ /* Which logical zone this is */
+ zone_count_t zone_number;
+ /* The thread id for this zone */
+ thread_id_t thread_id;
+ /* In progress operations keyed by LBN */
+ struct int_map *lbn_operations;
+ /* The logical to physical map */
+ struct block_map_zone *block_map_zone;
+ /* The current flush generation */
+ sequence_number_t flush_generation;
+ /*
+ * The oldest active generation in this zone. This is mutated only on the logical zone
+ * thread but is queried from the flusher thread.
+ */
+ sequence_number_t oldest_active_generation;
+ /* The number of IOs in the current flush generation */
+ block_count_t ios_in_flush_generation;
+ /* The youngest generation of the current notification */
+ sequence_number_t notification_generation;
+ /* Whether a notification is in progress */
+ bool notifying;
+ /* The queue of active data write VIOs */
+ struct list_head write_vios;
+ /* The administrative state of the zone */
+ struct admin_state state;
+ /* The physical zone from which to allocate */
+ struct physical_zone *allocation_zone;
+ /* The number of allocations done from the current allocation_zone */
+ block_count_t allocation_count;
+ /* The next zone */
+ struct logical_zone *next;
+};
+
+struct logical_zones {
+ /* The vdo whose zones these are */
+ struct vdo *vdo;
+ /* The manager for administrative actions */
+ struct action_manager *manager;
+ /* The number of zones */
+ zone_count_t zone_count;
+ /* The logical zones themselves */
+ struct logical_zone zones[];
+};
+
+int __must_check vdo_make_logical_zones(struct vdo *vdo,
+ struct logical_zones **zones_ptr);
+
+void vdo_free_logical_zones(struct logical_zones *zones);
+
+void vdo_drain_logical_zones(struct logical_zones *zones,
+ const struct admin_state_code *operation,
+ struct vdo_completion *completion);
+
+void vdo_resume_logical_zones(struct logical_zones *zones,
+ struct vdo_completion *parent);
+
+void vdo_increment_logical_zone_flush_generation(struct logical_zone *zone,
+ sequence_number_t expected_generation);
+
+void vdo_acquire_flush_generation_lock(struct data_vio *data_vio);
+
+void vdo_release_flush_generation_lock(struct data_vio *data_vio);
+
+struct physical_zone * __must_check vdo_get_next_allocation_zone(struct logical_zone *zone);
+
+void vdo_dump_logical_zone(const struct logical_zone *zone);
+
+#endif /* VDO_LOGICAL_ZONE_H */