Function report |
Source Code:block\partitions\efi.c |
Create Date:2022-07-28 17:31:35 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:s_gpt_valid() - tests one GPT header and PTEs for validity*@state: disk parsed partitions*@lba: logical block address of the GPT header to test*@gpt: GPT header ptr, filled on return.*@ptes: PTEs ptr, filled on return.
Proto:static int is_gpt_valid(struct parsed_partitions *state, u64 lba, gpt_header **gpt, gpt_entry **ptes)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct parsed_partitions * | state | |
u64 | lba | |
gpt_header ** | gpt | |
gpt_entry ** | ptes |
343 | If Not ptes Then Return 0 |
349 | If le64_to_cpu(signature) != GPT_HEADER_SIGNATURE Then |
350 | pr_debug("GUID Partition Table Header signature is wrong:%lld != %lld\n", (unsignedlonglong)le64_to_cpu(signature), (unsignedlonglong)GPT_HEADER_SIGNATURE) |
354 | Go to fail |
358 | If le32_to_cpu(header_size) > bdev_logical_block_size(bdev) Then |
360 | pr_debug("GUID Partition Table Header size is too large: %u > %u\n", le32_to_cpu(header_size), bdev_logical_block_size(bdev)) |
363 | Go to fail |
367 | If le32_to_cpu(header_size) < sizeof(gpt_header) Then |
368 | pr_debug("GUID Partition Table Header size is too small: %u < %zu\n", le32_to_cpu(header_size), sizeof(gpt_header)) |
371 | Go to fail |
375 | origcrc = le32_to_cpu(header_crc32) |
376 | header_crc32 = 0 |
384 | header_crc32 = cpu_to_le32(origcrc) |
388 | If le64_to_cpu(my_lba) != lba Then |
389 | pr_debug("GPT my_lba incorrect: %lld != %lld\n", (unsignedlonglong)le64_to_cpu(my_lba), (unsignedlonglong)lba) |
392 | Go to fail |
399 | If le64_to_cpu(first_usable_lba) > lastlba Then |
400 | pr_debug("GPT: first_usable_lba incorrect: %lld > %lld\n", (unsignedlonglong)le64_to_cpu(first_usable_lba), (unsignedlonglong)lastlba) |
403 | Go to fail |
405 | If le64_to_cpu(last_usable_lba) > lastlba Then |
406 | pr_debug("GPT: last_usable_lba incorrect: %lld > %lld\n", (unsignedlonglong)le64_to_cpu(last_usable_lba), (unsignedlonglong)lastlba) |
409 | Go to fail |
411 | If le64_to_cpu(last_usable_lba) < le64_to_cpu(first_usable_lba) Then |
412 | pr_debug("GPT: last_usable_lba incorrect: %lld > %lld\n", (unsignedlonglong)le64_to_cpu(last_usable_lba), (unsignedlonglong)le64_to_cpu(first_usable_lba)) |
415 | Go to fail |
418 | If le32_to_cpu(sizeof_partition_entry) != sizeof(gpt_entry) Then |
426 | If pt_size > Maximum allocatable size Then |
427 | pr_debug("GUID Partition Table is too large: %llu > %lu bytes\n", (unsignedlonglong)pt_size, Maximum allocatable size ) |
429 | Go to fail |
432 | If Not (ptes = alloc_read_gpt_entries(): reads partition entries from disk*@state: disk parsed partitions*@gpt: GPT header* Description: Returns ptes on success, NULL on error) Then Go to fail |
438 | If crc != le32_to_cpu(partition_entry_array_crc32) Then |
444 | Return 1 |
446 | fail_ptes : |
448 | * ptes = NULL |
449 | fail : |
451 | * gpt = NULL |
452 | Return 0 |
Name | Describe |
---|---|
find_valid_gpt | d_valid_gpt() - Search disk for valid GPT headers and PTEs*@state: disk parsed partitions*@gpt: GPT header ptr, filled on return.*@ptes: PTEs ptr, filled on return.* Description: Returns 1 if valid, 0 on error. |
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