| 1 | /*
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| 2 | * Copyright (c) 2025 Miroslav Cimerman
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup hr
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | */
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| 35 |
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| 36 | #ifndef _HR_SUPERBLOCK_H
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| 37 | #define _HR_SUPERBLOCK_H
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| 38 |
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| 39 | #include "var.h"
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| 40 |
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| 41 | #define HR_META_SIZE 1 /* in blocks */
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| 42 | #define HR_META_OFF 7 /* in blocks */
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| 43 | #define HR_DATA_OFF (HR_META_OFF + HR_META_SIZE)
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| 44 |
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| 45 | #define HR_MAGIC_STR "HelenRAID"
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| 46 | #define HR_MAGIC_SIZE 16
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| 47 | #define HR_UUID_LEN 16
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| 48 | /* #define HR_METADATA_VERSION 0 */
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| 49 |
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| 50 | typedef struct hr_metadata hr_metadata_t;
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| 51 | typedef struct hr_volume hr_volume_t;
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| 52 |
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| 53 | struct hr_metadata {
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| 54 | char magic[HR_MAGIC_SIZE];
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| 55 |
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| 56 | uint8_t uuid[HR_UUID_LEN];
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| 57 |
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| 58 | /* TODO: change to blkno */
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| 59 | uint64_t nblocks; /* all blocks */
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| 60 | uint64_t data_blkno; /* usable blocks */
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| 61 |
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| 62 | uint64_t truncated_blkno; /* usable blocks */
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| 63 | uint64_t data_offset;
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| 64 |
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| 65 | uint64_t counter; /* yet unused */
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| 66 | uint32_t version; /* yet unused */
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| 67 | uint32_t extent_no;
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| 68 |
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| 69 | uint32_t index; /* index of extent in volume */
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| 70 | uint32_t level;
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| 71 | uint32_t layout;
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| 72 | uint32_t strip_size;
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| 73 |
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| 74 | uint32_t bsize;
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| 75 |
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| 76 | char devname[HR_DEVNAME_LEN];
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| 77 | };
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| 78 |
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| 79 | extern errno_t hr_write_meta_to_vol(hr_volume_t *);
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| 80 | extern errno_t hr_write_meta_to_ext(hr_volume_t *, size_t);
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| 81 | extern errno_t hr_fill_vol_from_meta(hr_volume_t *);
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| 82 | extern errno_t hr_get_metadata_block(service_id_t, void **);
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| 83 | extern void hr_decode_metadata_from_block(void *, hr_metadata_t *);
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| 84 | extern void hr_metadata_dump(hr_metadata_t *);
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| 85 | extern bool hr_valid_md_magic(hr_metadata_t *);
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| 86 |
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| 87 | #endif
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| 88 |
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| 89 | /** @}
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| 90 | */
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