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1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. | 1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. |
2 * Use of this source code is governed by a BSD-style license that can be | 2 * Use of this source code is governed by a BSD-style license that can be |
3 * found in the LICENSE file. | 3 * found in the LICENSE file. |
4 */ | 4 */ |
5 | 5 |
6 #include "cgptlib.h" | 6 #include "cgptlib.h" |
7 #include "cgptlib_internal.h" | 7 #include "cgptlib_internal.h" |
8 #include "crc32.h" | 8 #include "crc32.h" |
9 #include "gpt.h" | 9 #include "gpt.h" |
10 #include "utility.h" | 10 #include "utility.h" |
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50 if (h->revision != GPT_HEADER_REVISION) | 50 if (h->revision != GPT_HEADER_REVISION) |
51 return 1; | 51 return 1; |
52 if (h->size < MIN_SIZE_OF_HEADER || h->size > MAX_SIZE_OF_HEADER) | 52 if (h->size < MIN_SIZE_OF_HEADER || h->size > MAX_SIZE_OF_HEADER) |
53 return 1; | 53 return 1; |
54 | 54 |
55 /* Check CRC before looking at remaining fields */ | 55 /* Check CRC before looking at remaining fields */ |
56 if (HeaderCrc(h) != h->header_crc32) | 56 if (HeaderCrc(h) != h->header_crc32) |
57 return 1; | 57 return 1; |
58 | 58 |
59 /* Reserved fields must be zero. */ | 59 /* Reserved fields must be zero. */ |
60 if (h->reserved) | 60 if (h->reserved_zero) |
61 return 1; | 61 return 1; |
62 | 62 |
63 /* TODO: Padding must be set to zero. */ | 63 /* TODO: Padding must be set to zero. */ |
64 | 64 |
65 /* If entry size is different than our struct, we won't be able to | 65 /* If entry size is different than our struct, we won't be able to |
66 * parse it. Technically, any size 2^N where N>=7 is valid. */ | 66 * parse it. Technically, any size 2^N where N>=7 is valid. */ |
67 if (h->size_of_entry != sizeof(GptEntry)) | 67 if (h->size_of_entry != sizeof(GptEntry)) |
68 return 1; | 68 return 1; |
69 if ((h->number_of_entries < MIN_NUMBER_OF_ENTRIES) || | 69 if ((h->number_of_entries < MIN_NUMBER_OF_ENTRIES) || |
70 (h->number_of_entries > MAX_NUMBER_OF_ENTRIES) || | 70 (h->number_of_entries > MAX_NUMBER_OF_ENTRIES) || |
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167 * my_lba | 167 * my_lba |
168 * alternate_lba | 168 * alternate_lba |
169 * entries_lba */ | 169 * entries_lba */ |
170 int HeaderFieldsSame(GptHeader *h1, GptHeader *h2) { | 170 int HeaderFieldsSame(GptHeader *h1, GptHeader *h2) { |
171 if (Memcmp(h1->signature, h2->signature, sizeof(h1->signature))) | 171 if (Memcmp(h1->signature, h2->signature, sizeof(h1->signature))) |
172 return 1; | 172 return 1; |
173 if (h1->revision != h2->revision) | 173 if (h1->revision != h2->revision) |
174 return 1; | 174 return 1; |
175 if (h1->size != h2->size) | 175 if (h1->size != h2->size) |
176 return 1; | 176 return 1; |
177 if (h1->reserved != h2->reserved) | 177 if (h1->reserved_zero != h2->reserved_zero) |
178 return 1; | 178 return 1; |
179 if (h1->first_usable_lba != h2->first_usable_lba) | 179 if (h1->first_usable_lba != h2->first_usable_lba) |
180 return 1; | 180 return 1; |
181 if (h1->last_usable_lba != h2->last_usable_lba) | 181 if (h1->last_usable_lba != h2->last_usable_lba) |
182 return 1; | 182 return 1; |
183 if (Memcmp(&h1->disk_uuid, &h2->disk_uuid, sizeof(Guid))) | 183 if (Memcmp(&h1->disk_uuid, &h2->disk_uuid, sizeof(Guid))) |
184 return 1; | 184 return 1; |
185 if (h1->number_of_entries != h2->number_of_entries) | 185 if (h1->number_of_entries != h2->number_of_entries) |
186 return 1; | 186 return 1; |
187 if (h1->size_of_entry != h2->size_of_entry) | 187 if (h1->size_of_entry != h2->size_of_entry) |
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339 e->attributes |= ((uint64_t)priority << CGPT_ATTRIBUTE_PRIORITY_OFFSET) & | 339 e->attributes |= ((uint64_t)priority << CGPT_ATTRIBUTE_PRIORITY_OFFSET) & |
340 CGPT_ATTRIBUTE_PRIORITY_MASK; | 340 CGPT_ATTRIBUTE_PRIORITY_MASK; |
341 } | 341 } |
342 | 342 |
343 | 343 |
344 void SetEntryTries(GptEntry* e, int tries) { | 344 void SetEntryTries(GptEntry* e, int tries) { |
345 e->attributes &= ~CGPT_ATTRIBUTE_TRIES_MASK; | 345 e->attributes &= ~CGPT_ATTRIBUTE_TRIES_MASK; |
346 e->attributes |= ((uint64_t)tries << CGPT_ATTRIBUTE_TRIES_OFFSET) & | 346 e->attributes |= ((uint64_t)tries << CGPT_ATTRIBUTE_TRIES_OFFSET) & |
347 CGPT_ATTRIBUTE_TRIES_MASK; | 347 CGPT_ATTRIBUTE_TRIES_MASK; |
348 } | 348 } |
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