| 1 | /*
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| 2 | * Copyright (c) 2024 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 | #include <block.h>
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| 37 | #include <byteorder.h>
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| 38 | #include <errno.h>
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| 39 | #include <io/log.h>
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| 40 | #include <loc.h>
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| 41 | #include <mem.h>
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| 42 | #include <uuid.h>
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| 43 | #include <stdlib.h>
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| 44 | #include <stdio.h>
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| 45 | #include <str.h>
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| 46 | #include <types/uuid.h>
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| 47 |
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| 48 | #include "superblock.h"
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| 49 | #include "util.h"
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| 50 | #include "var.h"
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| 51 |
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| 52 | static errno_t read_metadata(service_id_t, hr_metadata_t *);
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| 53 | static errno_t hr_fill_meta_from_vol(hr_volume_t *, hr_metadata_t *);
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| 54 |
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| 55 | errno_t hr_write_meta_to_vol(hr_volume_t *vol)
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| 56 | {
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| 57 | HR_DEBUG("hr_write_meta_to_vol()\n");
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| 58 |
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| 59 | errno_t rc;
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| 60 | size_t i;
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| 61 | hr_metadata_t *metadata;
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| 62 | uuid_t uuid;
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| 63 |
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| 64 | metadata = calloc(1, HR_META_SIZE * vol->bsize);
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| 65 | if (metadata == NULL)
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| 66 | return ENOMEM;
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| 67 |
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| 68 | rc = hr_fill_meta_from_vol(vol, metadata);
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| 69 | if (rc != EOK)
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| 70 | goto error;
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| 71 |
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| 72 | for (i = 0; i < vol->extent_no; i++) {
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| 73 | metadata->index = host2uint32_t_le(i);
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| 74 |
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| 75 | rc = uuid_generate(&uuid);
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| 76 | if (rc != EOK)
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| 77 | goto error;
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| 78 | uuid_encode(&uuid, metadata->uuid);
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| 79 |
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| 80 | rc = block_write_direct(vol->extents[i].svc_id, HR_META_OFF,
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| 81 | HR_META_SIZE, metadata);
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| 82 | if (rc != EOK)
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| 83 | goto error;
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| 84 |
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| 85 | /* rndgen */
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| 86 | fibril_usleep(1000);
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| 87 | }
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| 88 | error:
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| 89 | free(metadata);
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| 90 | return rc;
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| 91 | }
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| 92 |
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| 93 | errno_t hr_write_meta_to_ext(hr_volume_t *vol, size_t ext)
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| 94 | {
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| 95 | HR_DEBUG("hr_write_meta_to_vol()\n");
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| 96 |
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| 97 | errno_t rc;
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| 98 | hr_metadata_t *metadata;
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| 99 | uuid_t uuid;
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| 100 |
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| 101 | metadata = calloc(1, HR_META_SIZE * vol->bsize);
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| 102 | if (metadata == NULL)
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| 103 | return ENOMEM;
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| 104 |
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| 105 | rc = hr_fill_meta_from_vol(vol, metadata);
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| 106 | if (rc != EOK)
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| 107 | goto error;
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| 108 |
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| 109 | metadata->index = host2uint32_t_le(ext);
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| 110 |
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| 111 | rc = uuid_generate(&uuid);
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| 112 | if (rc != EOK)
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| 113 | goto error;
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| 114 | uuid_encode(&uuid, metadata->uuid);
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| 115 |
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| 116 | rc = block_write_direct(vol->extents[ext].svc_id, HR_META_OFF,
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| 117 | HR_META_SIZE, metadata);
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| 118 | if (rc != EOK)
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| 119 | goto error;
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| 120 |
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| 121 | error:
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| 122 | free(metadata);
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| 123 | return rc;
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| 124 | }
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| 125 |
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| 126 | /*
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| 127 | * Fill metadata members from
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| 128 | * specified volume.
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| 129 | *
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| 130 | * Does not fill extent index and UUID.
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| 131 | */
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| 132 | static errno_t hr_fill_meta_from_vol(hr_volume_t *vol, hr_metadata_t *metadata)
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| 133 | {
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| 134 | HR_DEBUG("hr_fill_meta_from_vol()\n");
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| 135 |
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| 136 | size_t meta_blkno; /* blocks needed to write metadata */
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| 137 |
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| 138 | meta_blkno = (HR_META_OFF + HR_META_SIZE);
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| 139 | if (vol->level != HR_LVL_1)
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| 140 | meta_blkno *= vol->extent_no;
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| 141 |
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| 142 | if (vol->nblocks < meta_blkno) {
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| 143 | HR_ERROR("hr_fill_meta_from_vol(): volume \"%s\" does not "
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| 144 | " have enough space to store metada, aborting\n",
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| 145 | vol->devname);
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| 146 | return EINVAL;
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| 147 | } else if (vol->nblocks == meta_blkno) {
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| 148 | HR_ERROR("hr_fill_meta_from_vol(): volume \"%s\" would have "
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| 149 | "zero data blocks after writing metadata, aborting\n",
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| 150 | vol->devname);
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| 151 | return EINVAL;
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| 152 | }
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| 153 |
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| 154 | metadata->magic = host2uint64_t_le(HR_MAGIC);
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| 155 | metadata->version = host2uint32_t_le(~(0U)); /* unused */
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| 156 | metadata->extent_no = host2uint32_t_le(vol->extent_no);
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| 157 | /* index filled separately for each extent */
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| 158 | metadata->level = host2uint32_t_le(vol->level);
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| 159 | metadata->layout = host2uint32_t_le(vol->layout);
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| 160 | metadata->strip_size = host2uint32_t_le(vol->strip_size);
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| 161 | metadata->nblocks = host2uint64_t_le(vol->nblocks);
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| 162 | metadata->data_blkno = host2uint64_t_le(vol->data_blkno);
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| 163 | metadata->data_offset = host2uint64_t_le(vol->data_offset);
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| 164 | metadata->counter = host2uint64_t_le(~(0UL)); /* unused */
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| 165 | /* UUID generated separately for each extent */
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| 166 | str_cpy(metadata->devname, HR_DEVNAME_LEN, vol->devname);
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| 167 |
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| 168 | return EOK;
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| 169 | }
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| 170 |
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| 171 | static errno_t validate_meta(hr_metadata_t *md)
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| 172 | {
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| 173 | if (uint64_t_le2host(md->magic) != HR_MAGIC) {
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| 174 | HR_ERROR("invalid magic\n");
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| 175 | return EINVAL;
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| 176 | }
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| 177 | return EOK;
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| 178 | }
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| 179 |
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| 180 | errno_t hr_fill_vol_from_meta(hr_volume_t *vol)
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| 181 | {
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| 182 | HR_DEBUG("hr_get_vol_from_meta()\n");
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| 183 |
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| 184 | errno_t rc;
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| 185 | hr_metadata_t *metadata;
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| 186 |
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| 187 | metadata = calloc(1, HR_META_SIZE * vol->bsize);
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| 188 | if (metadata == NULL)
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| 189 | return ENOMEM;
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| 190 |
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| 191 | service_id_t cfg_svc_id_order[HR_MAX_EXTENTS] = { 0 };
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| 192 | for (size_t i = 0; i < vol->extent_no; i++)
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| 193 | cfg_svc_id_order[i] = vol->extents[i].svc_id;
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| 194 |
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| 195 | int32_t md_order[HR_MAX_EXTENTS] = { 0 };
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| 196 | for (size_t i = 0; i < vol->extent_no; i++) {
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| 197 | if (cfg_svc_id_order[i] == 0) {
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| 198 | md_order[i] = -1;
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| 199 | continue;
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| 200 | }
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| 201 | rc = read_metadata(cfg_svc_id_order[i], metadata);
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| 202 | if (rc != EOK)
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| 203 | goto end;
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| 204 | rc = validate_meta(metadata);
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| 205 | if (rc != EOK)
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| 206 | goto end;
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| 207 | md_order[i] = uint32_t_le2host(metadata->index);
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| 208 | }
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| 209 |
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| 210 | for (size_t i = 0; i < vol->extent_no; i++) {
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| 211 | vol->extents[i].svc_id = 0;
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| 212 | vol->extents[i].status = HR_EXT_MISSING;
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| 213 | }
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| 214 |
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| 215 | /* sort */
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| 216 | for (size_t i = 0; i < vol->extent_no; i++) {
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| 217 | for (size_t j = 0; j < vol->extent_no; j++) {
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| 218 | if (i == (uint32_t)md_order[j]) {
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| 219 | vol->extents[i].svc_id = cfg_svc_id_order[j];
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| 220 | vol->extents[i].status = HR_EXT_ONLINE;
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| 221 | }
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| 222 | }
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| 223 | }
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| 224 |
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| 225 | /*
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| 226 | * still assume metadata are in sync across extents
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| 227 | */
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| 228 |
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| 229 | if (vol->extent_no != uint32_t_le2host(metadata->extent_no)) {
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| 230 | HR_ERROR("number of divices in array differ: specified %zu, "
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| 231 | "metadata states %u",
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| 232 | vol->extent_no, uint32_t_le2host(metadata->extent_no));
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| 233 | rc = EINVAL;
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| 234 | goto end;
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| 235 | }
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| 236 |
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| 237 | /* TODO: handle version */
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| 238 | vol->level = uint32_t_le2host(metadata->level);
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| 239 | vol->layout = (uint8_t)uint32_t_le2host(metadata->layout);
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| 240 | vol->strip_size = uint32_t_le2host(metadata->strip_size);
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| 241 | vol->nblocks = uint64_t_le2host(metadata->nblocks);
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| 242 | vol->data_blkno = uint64_t_le2host(metadata->data_blkno);
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| 243 | vol->data_offset = uint64_t_le2host(metadata->data_offset);
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| 244 | vol->counter = uint64_t_le2host(0x00); /* unused */
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| 245 |
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| 246 | if (str_cmp(metadata->devname, vol->devname) != 0) {
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| 247 | HR_WARN("devname on metadata (%s) and config (%s) differ, "
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| 248 | "using config", metadata->devname, vol->devname);
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| 249 | }
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| 250 | end:
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| 251 | free(metadata);
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| 252 | return rc;
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| 253 | }
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| 254 |
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| 255 | static errno_t read_metadata(service_id_t dev, hr_metadata_t *metadata)
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| 256 | {
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| 257 | errno_t rc;
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| 258 | size_t bsize;
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| 259 | uint64_t nblocks;
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| 260 |
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| 261 | rc = block_get_bsize(dev, &bsize);
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| 262 | if (rc != EOK)
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| 263 | return rc;
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| 264 |
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| 265 | rc = block_get_nblocks(dev, &nblocks);
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| 266 | if (rc != EOK)
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| 267 | return rc;
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| 268 |
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| 269 | if (nblocks < (HR_META_SIZE + HR_META_OFF) * bsize)
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| 270 | return EINVAL;
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| 271 |
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| 272 | rc = block_read_direct(dev, HR_META_OFF, HR_META_SIZE, metadata);
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| 273 | if (rc != EOK)
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| 274 | return rc;
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| 275 |
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| 276 | return EOK;
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| 277 | }
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| 278 |
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| 279 | /** @}
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| 280 | */
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