| 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 | #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 <inttypes.h>
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| 40 | #include <io/log.h>
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| 41 | #include <loc.h>
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| 42 | #include <mem.h>
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| 43 | #include <uuid.h>
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| 44 | #include <stdlib.h>
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| 45 | #include <stdio.h>
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| 46 | #include <str.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 | #include "metadata/foreign/geom/g_mirror.h"
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| 53 | #include "metadata/native.h"
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| 54 |
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| 55 | extern hr_superblock_ops_t metadata_native_ops;
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| 56 | extern hr_superblock_ops_t metadata_gmirror_ops;
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| 57 |
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| 58 | static hr_superblock_ops_t *hr_superblock_ops_all[] = {
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| 59 | [HR_METADATA_NATIVE] = &metadata_native_ops,
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| 60 | [HR_METADATA_GEOM_MIRROR] = &metadata_gmirror_ops
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| 61 | };
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| 62 |
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| 63 | hr_superblock_ops_t *get_type_ops(metadata_type_t type)
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| 64 | {
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| 65 | assert(type >= HR_METADATA_NATIVE && type < HR_METADATA_LAST_DUMMY);
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| 66 |
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| 67 | return hr_superblock_ops_all[type];
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| 68 | }
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| 69 |
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| 70 | errno_t find_metadata(service_id_t svc_id, void **rmetadata,
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| 71 | metadata_type_t *rtype)
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| 72 | {
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| 73 | HR_DEBUG("%s()", __func__);
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| 74 |
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| 75 | errno_t rc;
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| 76 | hr_superblock_ops_t *meta_ops;
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| 77 | void *meta_block;
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| 78 | void *metadata_struct;
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| 79 |
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| 80 | if (rmetadata == NULL)
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| 81 | return EINVAL;
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| 82 | if (rtype == NULL)
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| 83 | return EINVAL;
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| 84 |
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| 85 | volatile metadata_type_t type = HR_METADATA_NATIVE;
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| 86 | for (; type < HR_METADATA_LAST_DUMMY; type++) {
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| 87 | meta_ops = hr_superblock_ops_all[type];
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| 88 |
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| 89 | metadata_struct = meta_ops->alloc_struct();
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| 90 | if (metadata_struct == NULL)
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| 91 | return ENOMEM;
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| 92 |
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| 93 | rc = meta_ops->get_block(svc_id, &meta_block);
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| 94 | if (rc == ENOMEM) {
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| 95 | free(metadata_struct);
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| 96 | return ENOMEM;
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| 97 | } else if (rc != EOK) {
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| 98 | free(metadata_struct);
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| 99 | continue;
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| 100 | }
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| 101 |
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| 102 | rc = meta_ops->decode(meta_block, metadata_struct);
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| 103 |
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| 104 | free(meta_block);
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| 105 |
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| 106 | if (rc != EOK) {
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| 107 | free(metadata_struct);
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| 108 | continue;
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| 109 | }
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| 110 |
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| 111 | if (!meta_ops->has_valid_magic(metadata_struct)) {
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| 112 | free(metadata_struct);
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| 113 | continue;
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| 114 | }
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| 115 |
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| 116 | *rmetadata = metadata_struct;
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| 117 | *rtype = type;
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| 118 | return EOK;
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| 119 | }
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| 120 |
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| 121 | return ENOFS;
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| 122 | }
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| 123 |
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| 124 | /** @}
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| 125 | */
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