43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
// Copyright (c) Vitaliy Filippov, 2019+
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// License: VNPL-1.1 (see README.md for details)
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#pragma once
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#include <stdint.h>
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#include <string>
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#include <map>
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struct blockstore_disk_t
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{
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std::string data_device, meta_device, journal_device;
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uint32_t data_block_size;
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uint64_t cfg_journal_size, cfg_data_size;
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// Required write alignment and journal/metadata/data areas' location alignment
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uint32_t disk_alignment = 4096;
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// Journal block size - minimum_io_size of the journal device is the best choice
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uint64_t journal_block_size = 4096;
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// Metadata block size - minimum_io_size of the metadata device is the best choice
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uint64_t meta_block_size = 4096;
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// Sparse write tracking granularity. 4 KB is a good choice. Must be a multiple of disk_alignment
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uint64_t bitmap_granularity = 4096;
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// By default, Blockstore locks all opened devices exclusively. This option can be used to disable locking
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bool disable_flock = false;
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int meta_fd = -1, data_fd = -1, journal_fd = -1;
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uint64_t meta_offset, meta_device_sect, meta_device_size, meta_len;
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uint64_t data_offset, data_device_sect, data_device_size, data_len;
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uint64_t journal_offset, journal_device_sect, journal_device_size, journal_len;
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uint32_t block_order;
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uint64_t block_count;
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uint32_t clean_entry_bitmap_size = 0, clean_entry_size = 0;
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void parse_config(std::map<std::string, std::string> & config);
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void open_data();
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void open_meta();
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void open_journal();
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void calc_lengths(bool skip_meta_check = false);
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void close_all();
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};
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