rulimine/common/fs/ntfs.h

72 lines
1.8 KiB
C

#ifndef __FS__NTFS_H__
#define __FS__NTFS_H__
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <lib/part.h>
#include <lib/blib.h>
struct ntfs_bpb {
uint8_t jump[3];
char oem[8];
uint16_t bytes_per_sector;
uint8_t sectors_per_cluster;
uint16_t reserved_sectors;
uint8_t fats_count;
uint16_t directory_entries_count;
uint16_t sector_totals;
uint8_t media_descriptor_type;
uint16_t sectors_per_fat_16;
uint16_t sectors_per_track;
uint16_t heads_count;
uint32_t hidden_sectors_count;
uint32_t large_sectors_count;
// ntfs
uint32_t sectors_per_fat_32;
uint64_t sectors_count_64;
uint64_t mft_cluster;
} __attribute__((packed));
struct ntfs_file_handle {
struct volume *part;
struct ntfs_bpb bpb;
// file record sizes
uint64_t file_record_size;
uint64_t sectors_per_file_record;
// MFT info, the offset and its runlist
uint64_t mft_offset;
uint8_t mft_run_list[256];
// the runlist of the open file/directory
uint8_t run_list[128];
// The resident index, only for directories,
// could be at the same time as a runlist
uint8_t resident_index_size;
// the resident data
uint8_t resident_data_size;
// we are using a union just for having different names, these
// won't have need to be used at the same time
union {
uint8_t resident_index[1024];
uint8_t resident_data[1024];
};
// info about the current file
uint32_t size_bytes;
};
int ntfs_check_signature(struct volume *part);
bool ntfs_open(struct ntfs_file_handle *ret, struct volume *part, const char *path);
int ntfs_read(struct ntfs_file_handle *file, void *buf, uint64_t loc, uint64_t count);
void ntfs_close(struct ntfs_file_handle *file);
#endif