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https://github.com/brain-hackers/u-boot-brain
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1116 lines
30 KiB
C
1116 lines
30 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2008 RuggedCom, Inc.
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* Richard Retanubun <RichardRetanubun@RuggedCom.com>
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*/
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/*
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* NOTE:
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* when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this
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* limits the maximum size of addressable storage to < 2 Terra Bytes
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*/
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#include <common.h>
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#include <blk.h>
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#include <log.h>
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#include <part.h>
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#include <uuid.h>
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#include <asm/cache.h>
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#include <asm/unaligned.h>
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#include <command.h>
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#include <fdtdec.h>
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#include <ide.h>
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#include <malloc.h>
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#include <memalign.h>
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#include <part_efi.h>
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#include <linux/compiler.h>
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#include <linux/ctype.h>
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#include <u-boot/crc.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* GUID for basic data partions.
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*/
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static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
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#ifdef CONFIG_HAVE_BLOCK_DEVICE
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/**
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* efi_crc32() - EFI version of crc32 function
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* @buf: buffer to calculate crc32 of
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* @len - length of buf
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*
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* Description: Returns EFI-style CRC32 value for @buf
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*/
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static inline u32 efi_crc32(const void *buf, u32 len)
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{
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return crc32(0, buf, len);
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}
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/*
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* Private function prototypes
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*/
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static int pmbr_part_valid(struct partition *part);
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static int is_pmbr_valid(legacy_mbr * mbr);
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static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
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gpt_header *pgpt_head, gpt_entry **pgpt_pte);
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static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
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gpt_header *pgpt_head);
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static int is_pte_valid(gpt_entry * pte);
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static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
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gpt_entry **pgpt_pte);
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static char *print_efiname(gpt_entry *pte)
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{
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static char name[PARTNAME_SZ + 1];
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int i;
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for (i = 0; i < PARTNAME_SZ; i++) {
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u8 c;
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c = pte->partition_name[i] & 0xff;
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c = (c && !isprint(c)) ? '.' : c;
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name[i] = c;
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}
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name[PARTNAME_SZ] = 0;
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return name;
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}
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static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
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static int get_bootable(gpt_entry *p)
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{
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int ret = 0;
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if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t)))
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ret |= PART_EFI_SYSTEM_PARTITION;
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if (p->attributes.fields.legacy_bios_bootable)
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ret |= PART_BOOTABLE;
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return ret;
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}
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static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
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lbaint_t lastlba)
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{
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uint32_t crc32_backup = 0;
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uint32_t calc_crc32;
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/* Check the GPT header signature */
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if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE_UBOOT) {
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printf("%s signature is wrong: 0x%llX != 0x%llX\n",
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"GUID Partition Table Header",
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le64_to_cpu(gpt_h->signature),
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GPT_HEADER_SIGNATURE_UBOOT);
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return -1;
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}
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/* Check the GUID Partition Table CRC */
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memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
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memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
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calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
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le32_to_cpu(gpt_h->header_size));
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memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
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if (calc_crc32 != le32_to_cpu(crc32_backup)) {
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printf("%s CRC is wrong: 0x%x != 0x%x\n",
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"GUID Partition Table Header",
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le32_to_cpu(crc32_backup), calc_crc32);
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return -1;
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}
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/*
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* Check that the my_lba entry points to the LBA that contains the GPT
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*/
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if (le64_to_cpu(gpt_h->my_lba) != lba) {
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printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
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le64_to_cpu(gpt_h->my_lba),
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lba);
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return -1;
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}
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/*
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* Check that the first_usable_lba and that the last_usable_lba are
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* within the disk.
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*/
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if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
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printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
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le64_to_cpu(gpt_h->first_usable_lba), lastlba);
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return -1;
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}
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if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
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printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
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le64_to_cpu(gpt_h->last_usable_lba), lastlba);
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return -1;
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}
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debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
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LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
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le64_to_cpu(gpt_h->last_usable_lba), lastlba);
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return 0;
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}
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static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
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{
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uint32_t calc_crc32;
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/* Check the GUID Partition Table Entry Array CRC */
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calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
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le32_to_cpu(gpt_h->num_partition_entries) *
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le32_to_cpu(gpt_h->sizeof_partition_entry));
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if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
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printf("%s: 0x%x != 0x%x\n",
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"GUID Partition Table Entry Array CRC is wrong",
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le32_to_cpu(gpt_h->partition_entry_array_crc32),
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calc_crc32);
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return -1;
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}
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return 0;
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}
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static void prepare_backup_gpt_header(gpt_header *gpt_h)
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{
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uint32_t calc_crc32;
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uint64_t val;
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/* recalculate the values for the Backup GPT Header */
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val = le64_to_cpu(gpt_h->my_lba);
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gpt_h->my_lba = gpt_h->alternate_lba;
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gpt_h->alternate_lba = cpu_to_le64(val);
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gpt_h->partition_entry_lba =
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cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
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gpt_h->header_crc32 = 0;
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calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
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le32_to_cpu(gpt_h->header_size));
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gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
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}
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#if CONFIG_IS_ENABLED(EFI_PARTITION)
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/*
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* Public Functions (include/part.h)
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*/
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/*
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* UUID is displayed as 32 hexadecimal digits, in 5 groups,
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* separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
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*/
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int get_disk_guid(struct blk_desc * dev_desc, char *guid)
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{
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ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
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gpt_entry *gpt_pte = NULL;
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unsigned char *guid_bin;
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/* This function validates AND fills in the GPT header and PTE */
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if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
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return -EINVAL;
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guid_bin = gpt_head->disk_guid.b;
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uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
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/* Remember to free pte */
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free(gpt_pte);
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return 0;
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}
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void part_print_efi(struct blk_desc *dev_desc)
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{
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ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
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gpt_entry *gpt_pte = NULL;
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int i = 0;
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char uuid[UUID_STR_LEN + 1];
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unsigned char *uuid_bin;
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/* This function validates AND fills in the GPT header and PTE */
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if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
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return;
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debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
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printf("Part\tStart LBA\tEnd LBA\t\tName\n");
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printf("\tAttributes\n");
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printf("\tType GUID\n");
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printf("\tPartition GUID\n");
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for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
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/* Stop at the first non valid PTE */
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if (!is_pte_valid(&gpt_pte[i]))
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break;
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printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
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le64_to_cpu(gpt_pte[i].starting_lba),
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le64_to_cpu(gpt_pte[i].ending_lba),
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print_efiname(&gpt_pte[i]));
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printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
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uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
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uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
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printf("\ttype:\t%s\n", uuid);
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#ifdef CONFIG_PARTITION_TYPE_GUID
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if (!uuid_guid_get_str(uuid_bin, uuid))
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printf("\ttype:\t%s\n", uuid);
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#endif
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uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
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uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
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printf("\tguid:\t%s\n", uuid);
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}
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/* Remember to free pte */
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free(gpt_pte);
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return;
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}
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int part_get_info_efi(struct blk_desc *dev_desc, int part,
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struct disk_partition *info)
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{
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ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
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gpt_entry *gpt_pte = NULL;
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/* "part" argument must be at least 1 */
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if (part < 1) {
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printf("%s: Invalid Argument(s)\n", __func__);
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return -1;
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}
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/* This function validates AND fills in the GPT header and PTE */
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if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
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return -1;
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if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
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!is_pte_valid(&gpt_pte[part - 1])) {
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debug("%s: *** ERROR: Invalid partition number %d ***\n",
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__func__, part);
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free(gpt_pte);
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return -1;
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}
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/* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
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info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
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/* The ending LBA is inclusive, to calculate size, add 1 to it */
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info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
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- info->start;
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info->blksz = dev_desc->blksz;
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snprintf((char *)info->name, sizeof(info->name), "%s",
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print_efiname(&gpt_pte[part - 1]));
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strcpy((char *)info->type, "U-Boot");
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info->bootable = get_bootable(&gpt_pte[part - 1]);
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#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
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uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
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UUID_STR_FORMAT_GUID);
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#endif
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#ifdef CONFIG_PARTITION_TYPE_GUID
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uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
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info->type_guid, UUID_STR_FORMAT_GUID);
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#endif
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debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
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info->start, info->size, info->name);
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/* Remember to free pte */
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free(gpt_pte);
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return 0;
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}
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static int part_test_efi(struct blk_desc *dev_desc)
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{
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ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
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/* Read legacy MBR from block 0 and validate it */
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if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
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|| (is_pmbr_valid(legacymbr) != 1)) {
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return -1;
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}
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return 0;
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}
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/**
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* set_protective_mbr(): Set the EFI protective MBR
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* @param dev_desc - block device descriptor
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*
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* @return - zero on success, otherwise error
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*/
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static int set_protective_mbr(struct blk_desc *dev_desc)
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{
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/* Setup the Protective MBR */
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ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
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if (p_mbr == NULL) {
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printf("%s: calloc failed!\n", __func__);
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return -1;
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}
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/* Read MBR to backup boot code if it exists */
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if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
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pr_err("** Can't read from device %d **\n", dev_desc->devnum);
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return -1;
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}
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/* Clear all data in MBR except of backed up boot code */
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memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
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MSDOS_MBR_BOOT_CODE_SIZE);
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/* Append signature */
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p_mbr->signature = MSDOS_MBR_SIGNATURE;
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p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
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p_mbr->partition_record[0].start_sect = 1;
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p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
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/* Write MBR sector to the MMC device */
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if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
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printf("** Can't write to device %d **\n",
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dev_desc->devnum);
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return -1;
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}
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return 0;
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}
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int write_gpt_table(struct blk_desc *dev_desc,
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gpt_header *gpt_h, gpt_entry *gpt_e)
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{
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const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
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* sizeof(gpt_entry)), dev_desc);
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u32 calc_crc32;
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debug("max lba: %x\n", (u32) dev_desc->lba);
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/* Setup the Protective MBR */
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if (set_protective_mbr(dev_desc) < 0)
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goto err;
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/* Generate CRC for the Primary GPT Header */
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calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
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le32_to_cpu(gpt_h->num_partition_entries) *
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le32_to_cpu(gpt_h->sizeof_partition_entry));
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gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
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calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
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le32_to_cpu(gpt_h->header_size));
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gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
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/* Write the First GPT to the block right after the Legacy MBR */
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if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
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goto err;
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if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
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pte_blk_cnt, gpt_e) != pte_blk_cnt)
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goto err;
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prepare_backup_gpt_header(gpt_h);
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if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
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+ 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
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goto err;
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if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
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gpt_h) != 1)
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goto err;
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debug("GPT successfully written to block device!\n");
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return 0;
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err:
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printf("** Can't write to device %d **\n", dev_desc->devnum);
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return -1;
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}
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int gpt_fill_pte(struct blk_desc *dev_desc,
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gpt_header *gpt_h, gpt_entry *gpt_e,
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struct disk_partition *partitions, int parts)
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{
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lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
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lbaint_t last_usable_lba = (lbaint_t)
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le64_to_cpu(gpt_h->last_usable_lba);
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int i, k;
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size_t efiname_len, dosname_len;
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#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
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char *str_uuid;
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unsigned char *bin_uuid;
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#endif
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#ifdef CONFIG_PARTITION_TYPE_GUID
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char *str_type_guid;
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unsigned char *bin_type_guid;
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#endif
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size_t hdr_start = gpt_h->my_lba;
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size_t hdr_end = hdr_start + 1;
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size_t pte_start = gpt_h->partition_entry_lba;
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size_t pte_end = pte_start +
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gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
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dev_desc->blksz;
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for (i = 0; i < parts; i++) {
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/* partition starting lba */
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lbaint_t start = partitions[i].start;
|
|
lbaint_t size = partitions[i].size;
|
|
|
|
if (start) {
|
|
offset = start + size;
|
|
} else {
|
|
start = offset;
|
|
offset += size;
|
|
}
|
|
|
|
/*
|
|
* If our partition overlaps with either the GPT
|
|
* header, or the partition entry, reject it.
|
|
*/
|
|
if (((start < hdr_end && hdr_start < (start + size)) ||
|
|
(start < pte_end && pte_start < (start + size)))) {
|
|
printf("Partition overlap\n");
|
|
return -1;
|
|
}
|
|
|
|
gpt_e[i].starting_lba = cpu_to_le64(start);
|
|
|
|
if (offset > (last_usable_lba + 1)) {
|
|
printf("Partitions layout exceds disk size\n");
|
|
return -1;
|
|
}
|
|
/* partition ending lba */
|
|
if ((i == parts - 1) && (size == 0))
|
|
/* extend the last partition to maximuim */
|
|
gpt_e[i].ending_lba = gpt_h->last_usable_lba;
|
|
else
|
|
gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
|
|
|
|
#ifdef CONFIG_PARTITION_TYPE_GUID
|
|
str_type_guid = partitions[i].type_guid;
|
|
bin_type_guid = gpt_e[i].partition_type_guid.b;
|
|
if (strlen(str_type_guid)) {
|
|
if (uuid_str_to_bin(str_type_guid, bin_type_guid,
|
|
UUID_STR_FORMAT_GUID)) {
|
|
printf("Partition no. %d: invalid type guid: %s\n",
|
|
i, str_type_guid);
|
|
return -1;
|
|
}
|
|
} else {
|
|
/* default partition type GUID */
|
|
memcpy(bin_type_guid,
|
|
&partition_basic_data_guid, 16);
|
|
}
|
|
#else
|
|
/* partition type GUID */
|
|
memcpy(gpt_e[i].partition_type_guid.b,
|
|
&partition_basic_data_guid, 16);
|
|
#endif
|
|
|
|
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
|
|
str_uuid = partitions[i].uuid;
|
|
bin_uuid = gpt_e[i].unique_partition_guid.b;
|
|
|
|
if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
|
|
printf("Partition no. %d: invalid guid: %s\n",
|
|
i, str_uuid);
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
/* partition attributes */
|
|
memset(&gpt_e[i].attributes, 0,
|
|
sizeof(gpt_entry_attributes));
|
|
|
|
if (partitions[i].bootable & PART_BOOTABLE)
|
|
gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
|
|
|
|
/* partition name */
|
|
efiname_len = sizeof(gpt_e[i].partition_name)
|
|
/ sizeof(efi_char16_t);
|
|
dosname_len = sizeof(partitions[i].name);
|
|
|
|
memset(gpt_e[i].partition_name, 0,
|
|
sizeof(gpt_e[i].partition_name));
|
|
|
|
for (k = 0; k < min(dosname_len, efiname_len); k++)
|
|
gpt_e[i].partition_name[k] =
|
|
(efi_char16_t)(partitions[i].name[k]);
|
|
|
|
debug("%s: name: %s offset[%d]: 0x" LBAF
|
|
" size[%d]: 0x" LBAF "\n",
|
|
__func__, partitions[i].name, i,
|
|
offset, i, size);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
|
|
{
|
|
uint32_t offset_blks = 2;
|
|
uint32_t __maybe_unused offset_bytes;
|
|
int __maybe_unused config_offset;
|
|
|
|
#if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
|
|
/*
|
|
* Some architectures require their SPL loader at a fixed
|
|
* address within the first 16KB of the disk. To avoid an
|
|
* overlap with the partition entries of the EFI partition
|
|
* table, the first safe offset (in bytes, from the start of
|
|
* the disk) for the entries can be set in
|
|
* CONFIG_EFI_PARTITION_ENTRIES_OFF.
|
|
*/
|
|
offset_bytes =
|
|
PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
|
|
offset_blks = offset_bytes / dev_desc->blksz;
|
|
#endif
|
|
|
|
#if defined(CONFIG_OF_CONTROL)
|
|
/*
|
|
* Allow the offset of the first partition entires (in bytes
|
|
* from the start of the device) to be specified as a property
|
|
* of the device tree '/config' node.
|
|
*/
|
|
config_offset = fdtdec_get_config_int(gd->fdt_blob,
|
|
"u-boot,efi-partition-entries-offset",
|
|
-EINVAL);
|
|
if (config_offset != -EINVAL) {
|
|
offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
|
|
offset_blks = offset_bytes / dev_desc->blksz;
|
|
}
|
|
#endif
|
|
|
|
debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
|
|
|
|
/*
|
|
* The earliest LBA this can be at is LBA#2 (i.e. right behind
|
|
* the (protective) MBR and the GPT header.
|
|
*/
|
|
if (offset_blks < 2)
|
|
offset_blks = 2;
|
|
|
|
return offset_blks;
|
|
}
|
|
|
|
int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
|
|
char *str_guid, int parts_count)
|
|
{
|
|
gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
|
|
gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
|
|
gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
|
|
gpt_h->my_lba = cpu_to_le64(1);
|
|
gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
|
|
gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
|
|
gpt_h->partition_entry_lba =
|
|
cpu_to_le64(partition_entries_offset(dev_desc));
|
|
gpt_h->first_usable_lba =
|
|
cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
|
|
gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
|
|
gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
|
|
gpt_h->header_crc32 = 0;
|
|
gpt_h->partition_entry_array_crc32 = 0;
|
|
|
|
if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
|
|
struct disk_partition *partitions, int parts_count)
|
|
{
|
|
gpt_header *gpt_h;
|
|
gpt_entry *gpt_e;
|
|
int ret, size;
|
|
|
|
size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
|
|
gpt_h = malloc_cache_aligned(size);
|
|
if (gpt_h == NULL) {
|
|
printf("%s: calloc failed!\n", __func__);
|
|
return -1;
|
|
}
|
|
memset(gpt_h, 0, size);
|
|
|
|
size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
|
|
dev_desc);
|
|
gpt_e = malloc_cache_aligned(size);
|
|
if (gpt_e == NULL) {
|
|
printf("%s: calloc failed!\n", __func__);
|
|
free(gpt_h);
|
|
return -1;
|
|
}
|
|
memset(gpt_e, 0, size);
|
|
|
|
/* Generate Primary GPT header (LBA1) */
|
|
ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/* Generate partition entries */
|
|
ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/* Write GPT partition table */
|
|
ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
|
|
|
|
err:
|
|
free(gpt_e);
|
|
free(gpt_h);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gpt_convert_efi_name_to_char() - convert u16 string to char string
|
|
*
|
|
* TODO: this conversion only supports ANSI characters
|
|
*
|
|
* @s: target buffer
|
|
* @es: u16 string to be converted
|
|
* @n: size of target buffer
|
|
*/
|
|
static void gpt_convert_efi_name_to_char(char *s, void *es, int n)
|
|
{
|
|
char *ess = es;
|
|
int i, j;
|
|
|
|
memset(s, '\0', n);
|
|
|
|
for (i = 0, j = 0; j < n; i += 2, j++) {
|
|
s[j] = ess[i];
|
|
if (!ess[i])
|
|
return;
|
|
}
|
|
}
|
|
|
|
int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
|
|
gpt_entry **gpt_pte)
|
|
{
|
|
/*
|
|
* This function validates AND
|
|
* fills in the GPT header and PTE
|
|
*/
|
|
if (is_gpt_valid(dev_desc,
|
|
GPT_PRIMARY_PARTITION_TABLE_LBA,
|
|
gpt_head, gpt_pte) != 1) {
|
|
printf("%s: *** ERROR: Invalid GPT ***\n",
|
|
__func__);
|
|
return -1;
|
|
}
|
|
|
|
/* Free pte before allocating again */
|
|
free(*gpt_pte);
|
|
|
|
if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
|
|
gpt_head, gpt_pte) != 1) {
|
|
printf("%s: *** ERROR: Invalid Backup GPT ***\n",
|
|
__func__);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gpt_verify_partitions(struct blk_desc *dev_desc,
|
|
struct disk_partition *partitions, int parts,
|
|
gpt_header *gpt_head, gpt_entry **gpt_pte)
|
|
{
|
|
char efi_str[PARTNAME_SZ + 1];
|
|
u64 gpt_part_size;
|
|
gpt_entry *gpt_e;
|
|
int ret, i;
|
|
|
|
ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
|
|
if (ret)
|
|
return ret;
|
|
|
|
gpt_e = *gpt_pte;
|
|
|
|
for (i = 0; i < parts; i++) {
|
|
if (i == gpt_head->num_partition_entries) {
|
|
pr_err("More partitions than allowed!\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Check if GPT and ENV partition names match */
|
|
gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
|
|
PARTNAME_SZ + 1);
|
|
|
|
debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
|
|
__func__, i, efi_str, partitions[i].name);
|
|
|
|
if (strncmp(efi_str, (char *)partitions[i].name,
|
|
sizeof(partitions->name))) {
|
|
pr_err("Partition name: %s does not match %s!\n",
|
|
efi_str, (char *)partitions[i].name);
|
|
return -1;
|
|
}
|
|
|
|
/* Check if GPT and ENV sizes match */
|
|
gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
|
|
le64_to_cpu(gpt_e[i].starting_lba) + 1;
|
|
debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
|
|
(unsigned long long)gpt_part_size,
|
|
(unsigned long long)partitions[i].size);
|
|
|
|
if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
|
|
/* We do not check the extend partition size */
|
|
if ((i == parts - 1) && (partitions[i].size == 0))
|
|
continue;
|
|
|
|
pr_err("Partition %s size: %llu does not match %llu!\n",
|
|
efi_str, (unsigned long long)gpt_part_size,
|
|
(unsigned long long)partitions[i].size);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Start address is optional - check only if provided
|
|
* in '$partition' variable
|
|
*/
|
|
if (!partitions[i].start) {
|
|
debug("\n");
|
|
continue;
|
|
}
|
|
|
|
/* Check if GPT and ENV start LBAs match */
|
|
debug("start LBA - GPT: %8llu, ENV: %8llu\n",
|
|
le64_to_cpu(gpt_e[i].starting_lba),
|
|
(unsigned long long)partitions[i].start);
|
|
|
|
if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
|
|
pr_err("Partition %s start: %llu does not match %llu!\n",
|
|
efi_str, le64_to_cpu(gpt_e[i].starting_lba),
|
|
(unsigned long long)partitions[i].start);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
|
|
{
|
|
gpt_header *gpt_h;
|
|
gpt_entry *gpt_e;
|
|
|
|
/* determine start of GPT Header in the buffer */
|
|
gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
|
|
dev_desc->blksz);
|
|
if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
|
|
dev_desc->lba))
|
|
return -1;
|
|
|
|
/* determine start of GPT Entries in the buffer */
|
|
gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
|
|
dev_desc->blksz);
|
|
if (validate_gpt_entries(gpt_h, gpt_e))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
|
|
{
|
|
gpt_header *gpt_h;
|
|
gpt_entry *gpt_e;
|
|
int gpt_e_blk_cnt;
|
|
lbaint_t lba;
|
|
int cnt;
|
|
|
|
if (is_valid_gpt_buf(dev_desc, buf))
|
|
return -1;
|
|
|
|
/* determine start of GPT Header in the buffer */
|
|
gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
|
|
dev_desc->blksz);
|
|
|
|
/* determine start of GPT Entries in the buffer */
|
|
gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
|
|
dev_desc->blksz);
|
|
gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
|
|
le32_to_cpu(gpt_h->sizeof_partition_entry)),
|
|
dev_desc);
|
|
|
|
/* write MBR */
|
|
lba = 0; /* MBR is always at 0 */
|
|
cnt = 1; /* MBR (1 block) */
|
|
if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
|
|
printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
|
|
__func__, "MBR", cnt, lba);
|
|
return 1;
|
|
}
|
|
|
|
/* write Primary GPT */
|
|
lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
|
|
cnt = 1; /* GPT Header (1 block) */
|
|
if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
|
|
printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
|
|
__func__, "Primary GPT Header", cnt, lba);
|
|
return 1;
|
|
}
|
|
|
|
lba = le64_to_cpu(gpt_h->partition_entry_lba);
|
|
cnt = gpt_e_blk_cnt;
|
|
if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
|
|
printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
|
|
__func__, "Primary GPT Entries", cnt, lba);
|
|
return 1;
|
|
}
|
|
|
|
prepare_backup_gpt_header(gpt_h);
|
|
|
|
/* write Backup GPT */
|
|
lba = le64_to_cpu(gpt_h->partition_entry_lba);
|
|
cnt = gpt_e_blk_cnt;
|
|
if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
|
|
printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
|
|
__func__, "Backup GPT Entries", cnt, lba);
|
|
return 1;
|
|
}
|
|
|
|
lba = le64_to_cpu(gpt_h->my_lba);
|
|
cnt = 1; /* GPT Header (1 block) */
|
|
if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
|
|
printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
|
|
__func__, "Backup GPT Header", cnt, lba);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Private functions
|
|
*/
|
|
/*
|
|
* pmbr_part_valid(): Check for EFI partition signature
|
|
*
|
|
* Returns: 1 if EFI GPT partition type is found.
|
|
*/
|
|
static int pmbr_part_valid(struct partition *part)
|
|
{
|
|
if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
|
|
get_unaligned_le32(&part->start_sect) == 1UL) {
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* is_pmbr_valid(): test Protective MBR for validity
|
|
*
|
|
* Returns: 1 if PMBR is valid, 0 otherwise.
|
|
* Validity depends on two things:
|
|
* 1) MSDOS signature is in the last two bytes of the MBR
|
|
* 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
|
|
*/
|
|
static int is_pmbr_valid(legacy_mbr * mbr)
|
|
{
|
|
int i = 0;
|
|
|
|
if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
|
|
return 0;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
if (pmbr_part_valid(&mbr->partition_record[i])) {
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* is_gpt_valid() - tests one GPT header and PTEs for validity
|
|
*
|
|
* lba is the logical block address of the GPT header to test
|
|
* gpt is a GPT header ptr, filled on return.
|
|
* ptes is a PTEs ptr, filled on return.
|
|
*
|
|
* Description: returns 1 if valid, 0 on error, 2 if ignored header
|
|
* If valid, returns pointers to PTEs.
|
|
*/
|
|
static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
|
|
gpt_header *pgpt_head, gpt_entry **pgpt_pte)
|
|
{
|
|
/* Confirm valid arguments prior to allocation. */
|
|
if (!dev_desc || !pgpt_head) {
|
|
printf("%s: Invalid Argument(s)\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
|
|
|
|
/* Read MBR Header from device */
|
|
if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
|
|
printf("*** ERROR: Can't read MBR header ***\n");
|
|
return 0;
|
|
}
|
|
|
|
/* Read GPT Header from device */
|
|
if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
|
|
printf("*** ERROR: Can't read GPT header ***\n");
|
|
return 0;
|
|
}
|
|
|
|
/* Invalid but nothing to yell about. */
|
|
if (le64_to_cpu(pgpt_head->signature) == GPT_HEADER_CHROMEOS_IGNORE) {
|
|
debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
|
|
return 2;
|
|
}
|
|
|
|
if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
|
|
return 0;
|
|
|
|
if (dev_desc->sig_type == SIG_TYPE_NONE) {
|
|
efi_guid_t empty = {};
|
|
if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
|
|
dev_desc->sig_type = SIG_TYPE_GUID;
|
|
memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
|
|
sizeof(empty));
|
|
} else if (mbr->unique_mbr_signature != 0) {
|
|
dev_desc->sig_type = SIG_TYPE_MBR;
|
|
dev_desc->mbr_sig = mbr->unique_mbr_signature;
|
|
}
|
|
}
|
|
|
|
/* Read and allocate Partition Table Entries */
|
|
*pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
|
|
if (*pgpt_pte == NULL) {
|
|
printf("GPT: Failed to allocate memory for PTE\n");
|
|
return 0;
|
|
}
|
|
|
|
if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
|
|
free(*pgpt_pte);
|
|
return 0;
|
|
}
|
|
|
|
/* We're done, all's well */
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* find_valid_gpt() - finds a valid GPT header and PTEs
|
|
*
|
|
* gpt is a GPT header ptr, filled on return.
|
|
* ptes is a PTEs ptr, filled on return.
|
|
*
|
|
* Description: returns 1 if found a valid gpt, 0 on error.
|
|
* If valid, returns pointers to PTEs.
|
|
*/
|
|
static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
|
|
gpt_entry **pgpt_pte)
|
|
{
|
|
int r;
|
|
|
|
r = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head,
|
|
pgpt_pte);
|
|
|
|
if (r != 1) {
|
|
if (r != 2)
|
|
printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
|
|
|
|
if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), gpt_head,
|
|
pgpt_pte) != 1) {
|
|
printf("%s: *** ERROR: Invalid Backup GPT ***\n",
|
|
__func__);
|
|
return 0;
|
|
}
|
|
if (r != 2)
|
|
printf("%s: *** Using Backup GPT ***\n",
|
|
__func__);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* alloc_read_gpt_entries(): reads partition entries from disk
|
|
* @dev_desc
|
|
* @gpt - GPT header
|
|
*
|
|
* Description: Returns ptes on success, NULL on error.
|
|
* Allocates space for PTEs based on information found in @gpt.
|
|
* Notes: remember to free pte when you're done!
|
|
*/
|
|
static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
|
|
gpt_header *pgpt_head)
|
|
{
|
|
size_t count = 0, blk_cnt;
|
|
lbaint_t blk;
|
|
gpt_entry *pte = NULL;
|
|
|
|
if (!dev_desc || !pgpt_head) {
|
|
printf("%s: Invalid Argument(s)\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
count = le32_to_cpu(pgpt_head->num_partition_entries) *
|
|
le32_to_cpu(pgpt_head->sizeof_partition_entry);
|
|
|
|
debug("%s: count = %u * %u = %lu\n", __func__,
|
|
(u32) le32_to_cpu(pgpt_head->num_partition_entries),
|
|
(u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
|
|
(ulong)count);
|
|
|
|
/* Allocate memory for PTE, remember to FREE */
|
|
if (count != 0) {
|
|
pte = memalign(ARCH_DMA_MINALIGN,
|
|
PAD_TO_BLOCKSIZE(count, dev_desc));
|
|
}
|
|
|
|
if (count == 0 || pte == NULL) {
|
|
printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
|
|
__func__, (ulong)count);
|
|
return NULL;
|
|
}
|
|
|
|
/* Read GPT Entries from device */
|
|
blk = le64_to_cpu(pgpt_head->partition_entry_lba);
|
|
blk_cnt = BLOCK_CNT(count, dev_desc);
|
|
if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
|
|
printf("*** ERROR: Can't read GPT Entries ***\n");
|
|
free(pte);
|
|
return NULL;
|
|
}
|
|
return pte;
|
|
}
|
|
|
|
/**
|
|
* is_pte_valid(): validates a single Partition Table Entry
|
|
* @gpt_entry - Pointer to a single Partition Table Entry
|
|
*
|
|
* Description: returns 1 if valid, 0 on error.
|
|
*/
|
|
static int is_pte_valid(gpt_entry * pte)
|
|
{
|
|
efi_guid_t unused_guid;
|
|
|
|
if (!pte) {
|
|
printf("%s: Invalid Argument(s)\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
/* Only one validation for now:
|
|
* The GUID Partition Type != Unused Entry (ALL-ZERO)
|
|
*/
|
|
memset(unused_guid.b, 0, sizeof(unused_guid.b));
|
|
|
|
if (memcmp(pte->partition_type_guid.b, unused_guid.b,
|
|
sizeof(unused_guid.b)) == 0) {
|
|
|
|
debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
|
|
(unsigned int)(uintptr_t)pte);
|
|
|
|
return 0;
|
|
} else {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
|
|
* check EFI first, since a DOS partition is often used as a 'protective MBR'
|
|
* with EFI.
|
|
*/
|
|
U_BOOT_PART_TYPE(a_efi) = {
|
|
.name = "EFI",
|
|
.part_type = PART_TYPE_EFI,
|
|
.max_entries = GPT_ENTRY_NUMBERS,
|
|
.get_info = part_get_info_ptr(part_get_info_efi),
|
|
.print = part_print_ptr(part_print_efi),
|
|
.test = part_test_efi,
|
|
};
|
|
#endif
|