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git://sourceware.org/git/lvm2.git
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829ab01708
Add very simplistic parser of vdo metadata to be able to obtain logical_blocks stored within vdo metadata - as lvm2 may submit smaller value due to internal aligment rules. To avoid creation of mismatching table line - use this number instead the one provided by lvm2.
116 lines
2.9 KiB
C
116 lines
2.9 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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DM_VDO_WRITE_POLICY_ASYNC_UNSAFE
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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; // in sectors
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uint32_t block_map_cache_size_mb;
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union {
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uint32_t block_map_era_length; // format period
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uint32_t block_map_period; // supported alias
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};
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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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bool dm_vdo_parse_logical_size(const char *vdo_path, uint64_t *logical_blocks);
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//----------------------------------------------------------------
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#endif
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