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git://sourceware.org/git/lvm2.git
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3320ab8334
Drop very old original format of VDO target and focus on V2 version. So some variables were renamed or replaced. There is no compatibility preserved (with assumption so far this is experimental feature and there is no real user). Note - version currently VDO calls this version 6.2.
111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/*
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* Copyright (C) 2018 Red Hat, Inc. All rights reserved.
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*
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* This file is part of the device-mapper userspace tools.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef DEVICE_MAPPER_VDO_TARGET_H
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#define DEVICE_MAPPER_VDO_TARGET_H
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#include <stdbool.h>
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#include <stdint.h>
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//----------------------------------------------------------------
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enum dm_vdo_operating_mode {
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DM_VDO_MODE_RECOVERING,
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DM_VDO_MODE_READ_ONLY,
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DM_VDO_MODE_NORMAL
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};
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enum dm_vdo_compression_state {
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DM_VDO_COMPRESSION_ONLINE,
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DM_VDO_COMPRESSION_OFFLINE
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};
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enum dm_vdo_index_state {
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DM_VDO_INDEX_ERROR,
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DM_VDO_INDEX_CLOSED,
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DM_VDO_INDEX_OPENING,
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DM_VDO_INDEX_CLOSING,
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DM_VDO_INDEX_OFFLINE,
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DM_VDO_INDEX_ONLINE,
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DM_VDO_INDEX_UNKNOWN
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};
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struct dm_vdo_status {
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char *device;
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enum dm_vdo_operating_mode operating_mode;
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bool recovering;
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enum dm_vdo_index_state index_state;
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enum dm_vdo_compression_state compression_state;
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uint64_t used_blocks;
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uint64_t total_blocks;
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};
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void dm_vdo_status_destroy(struct dm_vdo_status *s);
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#define VDO_MAX_ERROR 256
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struct dm_vdo_status_parse_result {
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char error[VDO_MAX_ERROR];
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struct dm_vdo_status *status;
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};
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struct dm_pool;
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// Parses the status line from the kernel target.
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bool dm_vdo_status_parse(struct dm_pool *mem, const char *input,
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struct dm_vdo_status_parse_result *result);
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enum dm_vdo_write_policy {
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DM_VDO_WRITE_POLICY_AUTO = 0,
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DM_VDO_WRITE_POLICY_SYNC,
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DM_VDO_WRITE_POLICY_ASYNC
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};
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// FIXME: review whether we should use the createParams from the userlib
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struct dm_vdo_target_params {
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uint32_t minimum_io_size;
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uint32_t block_map_cache_size_mb;
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uint32_t block_map_era_length; // format period
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uint32_t check_point_frequency;
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uint32_t index_memory_size_mb; // format
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uint32_t slab_size_mb; // format
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uint32_t max_discard;
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// threads
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uint32_t ack_threads;
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uint32_t bio_threads;
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uint32_t bio_rotation;
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uint32_t cpu_threads;
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uint32_t hash_zone_threads;
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uint32_t logical_threads;
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uint32_t physical_threads;
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bool use_compression;
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bool use_deduplication;
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bool use_metadata_hints;
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bool use_sparse_index; // format
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// write policy
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enum dm_vdo_write_policy write_policy;
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};
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bool dm_vdo_validate_target_params(const struct dm_vdo_target_params *vtp,
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uint64_t vdo_size);
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//----------------------------------------------------------------
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#endif
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