alexvoste
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
#ifndef PARTITION_H
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#define PARTITION_H
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#include <stdint.h>
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#include <stdbool.h>
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#include "blkdev.h"
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#define MBR_SIGNATURE 0xAA55
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#define MBR_SIGNATURE_OFF 510
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#define MBR_PARTITION_OFF 446
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#define MBR_MAX_PARTITIONS 4
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#define MBR_TYPE_EMPTY 0x00
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#define MBR_TYPE_FAT12 0x01
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#define MBR_TYPE_FAT16_S 0x04
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#define MBR_TYPE_EXTENDED 0x05
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#define MBR_TYPE_FAT16 0x06
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#define MBR_TYPE_FAT32_CHS 0x0B
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#define MBR_TYPE_FAT32_LBA 0x0C
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#define MBR_TYPE_FAT16_LBA 0x0E
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#define MBR_TYPE_LINUX 0x83
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#define MBR_TYPE_ESP 0xEF
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typedef struct __attribute__((packed)) {
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uint8_t boot_flag;
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uint8_t chs_start[3];
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uint8_t type;
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uint8_t chs_end[3];
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uint32_t lba_start;
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uint32_t sector_count;
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} mbr_partition_t;
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typedef struct __attribute__((packed)) {
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uint8_t bootstrap[440];
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uint32_t disk_signature;
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uint16_t reserved;
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mbr_partition_t partitions[4];
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uint16_t signature;
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} mbr_t;
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_Static_assert(sizeof(mbr_t) == 512, "mbr size must be 512");
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int partition_scan(blkdev_t *disk);
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int partition_write_mbr(blkdev_t *disk, const mbr_partition_t parts[4],
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uint32_t disk_signature);
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int partition_read_mbr(blkdev_t *disk, mbr_t *out);
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blkdev_t *partition_get(const char *name);
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#endif |