mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
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220 lines
10 KiB
C++
220 lines
10 KiB
C++
/****************************************************************************
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* Copyright (C) 2010
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* by Dimok
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any
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* damages arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any
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* purpose, including commercial applications, and to alter it and
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* redistribute it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you
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* must not claim that you wrote the original software. If you use
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* this software in a product, an acknowledgment in the product
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* documentation would be appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and
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* must not be misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*
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* for WiiXplorer 2010
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***************************************************************************/
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#ifndef PARTITION_HANDLE_H
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#define PARTITION_HANDLE_H
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#include <gccore.h>
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#include "safe_vector.hpp"
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#include "libwbfs/libwbfs.h"
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#include <string>
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#define MAX_PARTITIONS 32 /* Maximum number of partitions that can be found */
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#define MAX_MOUNTS 10 /* Maximum number of mounts available at one time */
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#define MAX_SYMLINK_DEPTH 10 /* Maximum search depth when resolving symbolic links */
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#define MBR_SIGNATURE 0x55AA
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#define EBR_SIGNATURE MBR_SIGNATURE
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#define VBR_SIGNATURE MBR_SIGNATURE
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#define GPT_SIGNATURE "EFI PART"
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#define PARTITION_BOOTABLE 0x80 /* Bootable (active) */
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#define PARTITION_NONBOOTABLE 0x00 /* Non-bootable */
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#define BYTES_PER_SECTOR 512 /* Default in libogc */
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#define MAX_BYTES_PER_SECTOR 4096 /* Max bytes per sector */
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enum SIG_OFFSETS {
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BPB_NTFS_ADDR = 0x3,
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BPB_FAT16_ADDR = 0x36,
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BPB_EXT2_ADDR = 0x38,
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BPB_FAT32_ADDR = 0x52,
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};
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static const char FAT_SIGNATURE[3] = {'F', 'A', 'T'};
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static const char NTFS_SIGNATURE[4] = {'N', 'T', 'F', 'S'};
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static const char WBFS_SIGNATURE[4] = {'W', 'B', 'F', 'S'};
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static const char EXT_SIGNATURE[2] = {0x53, 0xEF};
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typedef struct _PARTITION_RECORD {
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u8 status; /* Partition status; see above */
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u8 chs_start[3]; /* Cylinder-head-sector address to first block of partition */
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u8 type; /* Partition type; see above */
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u8 chs_end[3]; /* Cylinder-head-sector address to last block of partition */
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u32 lba_start; /* Local block address to first sector of partition */
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u32 block_count; /* Number of blocks in partition */
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} __attribute__((__packed__)) PARTITION_RECORD;
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typedef struct _MASTER_BOOT_RECORD {
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u8 code_area[440]; /* Code area; normally empty */
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u8 disk_guid[4]; /* Disk signature (optional) */
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u8 reserved[2]; /* Usually zeroed */
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PARTITION_RECORD partitions[4]; /* 4 primary partitions */
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u16 signature; /* MBR signature; 0xAA55 */
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} __attribute__((__packed__)) MASTER_BOOT_RECORD;
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typedef struct _EXTENDED_BOOT_RECORD {
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u8 code_area[446]; /* Code area; normally empty */
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PARTITION_RECORD partition; /* Primary partition */
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PARTITION_RECORD next_ebr; /* Next extended boot record in the chain */
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u8 reserved[32]; /* Normally empty */
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u16 signature; /* EBR signature; 0xAA55 */
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} __attribute__((__packed__)) EXTENDED_BOOT_RECORD;
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typedef struct _GUID_PARTITION_ENTRY
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{
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u8 Type_GUID[16]; /* Partition type GUID */
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u8 Unique_GUID[16]; /* Unique partition GUID */
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u64 First_LBA; /* First LBA (little-endian) */
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u64 Last_LBA; /* Last LBA (inclusive, usually odd) */
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u64 Attributes; /* GUID Attribute flags (e.g. bit 60 denotes read-only) */
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char Name[72]; /* Partition name (36 UTF-16LE code units) */
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} __attribute__((__packed__)) GUID_PARTITION_ENTRY;
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typedef struct _GPT_PARTITION_TABLE {
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char magic[8]; /* "EFI PART" */
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u32 Revision;
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u32 Header_Size; /* Size of this header */
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u32 CheckSum;
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u32 Reserved; /* Must be 0 */
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u64 Header_LBA; /* Location of this header, always 1 in primary copy */
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u64 Backup_Header_LBA; /* Location of backup header, always max lba - 1 */
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u64 First_Usable_LBA; /* Primary GPT partition table's last LBA + 1 */
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u64 Last_Usable_LBA; /* Secondary GPT partition table's first LBA - 1 */
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u8 GUID[16]; /* Disk GUID (also referred as UUID on UNIXes) */
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u64 Table_LBA; /* Always 2 in primary copy, or Header_LBA + 1. Secondary copy is Backup_Header_LBA - 1 */
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u32 Num_Entries; /* Number of entries in the partition info array */
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u32 Entry_Size; /* Size of each array entry, usually 128 */
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u32 Entries_CheckSum; /* CRC32 of partition array */
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u8 Zeroes[420]; /* Pad to a total 512 byte LBA or sizeof 1 LBA */
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GUID_PARTITION_ENTRY partitions[128]; /* Max 128 Partition Entries */
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} __attribute__((__packed__)) GPT_PARTITION_TABLE;
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typedef struct _PartitionFS {
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const char * FSName;
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u32 LBA_Start;
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u32 SecCount;
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bool Bootable;
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u8 PartitionType;
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u8 PartitionNum;
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u32 EBR_Sector;
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wbfs_t *wbfshandle;
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} PartitionFS;
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typedef struct _BIOS_PARAMETER_BLOCK {
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u16 Bytes_Per_Sector; /* Size of a sector in bytes. */
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u8 Sectors_Per_Cluster; /* Size of a cluster in sectors. */
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u16 ReservedSsectors; /* zero on ntfs */
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u8 Fats; /* zero on ntfs */
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u16 Root_Entries; /* zero on ntfs */
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u16 FatSectors; /* Number of sectors in volume. (FAT) Zero on ntfs */
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u8 Media_Type; /* 0xf8 = hard disk */
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u16 Sectors_Per_Fat; /* zero on ntfs*/
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u16 Sectors_Per_Track; /* Required to boot Windows. (0x0d) */
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u16 Heads; /* Required to boot Windows. (0x0f) */
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u32 Hidden_Sectors; /* Offset to the start of the partition (0x11) in sectors. */
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u32 Large_Sectors; /* Number of sectors in volume if Sectors is 0 (FAT) Zero on ntfs (0x15) */
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} __attribute__((__packed__)) BIOS_PARAMETER_BLOCK; /* 25 (0x19) bytes */
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typedef struct _VOLUME_BOOT_RECORD {
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u8 Jump[3]; /* Irrelevant (jump to boot up code).*/
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char Name[8]; /* Magic "NTFS ". */
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BIOS_PARAMETER_BLOCK bpb; /* See BIOS_PARAMETER_BLOCK. (0x0b) */
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u8 Drive_Type; /* 0x00 floppy, 0x80 hard disk */
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u8 Current_Head; /* zero on ntfs */
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u8 Extended_Boot_Signature; /* 0x80 on ntfs (Doesnt show this in M$ docs)*/
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u8 Reserved0; /* zero on ntfs */
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s64 Number_of_Sectors; /* Number of sectors in volume. (NTFS)(0x28)*/
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s64 MFT; /* Cluster location of mft data. */
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s64 MFT_Mirror; /* Cluster location of copy of mft. */
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s8 Clusters_Per_MFT; /* Mft record size in clusters. */
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u8 Reserved1[3]; /* zero */
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s8 Clusters_Per_Index; /* Index block size in clusters. */
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u8 Reserved2[3]; /* zero */
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u64 Volume_Serial_Number; /* Irrelevant (serial number). */
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u8 Checksum[4]; /* Boot sector checksum. */
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u8 Bootstrap[426]; /* Irrelevant (boot up code). (0x54) */
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u16 Signature; /* End of bootsector magic. LE 0xaa55 */
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} __attribute__((__packed__)) VOLUME_BOOT_RECORD; /* 512 (0x200) bytes */
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class PartitionHandle
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{
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public:
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//! Constructor reads the MBR and all EBRs and lists up the Partitions
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PartitionHandle(const DISC_INTERFACE *discio);
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//! Destructor unmounts drives
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~PartitionHandle();
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//! Is Drive inserted
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bool IsInserted() { if(!interface) return false; else return interface->isInserted(); };
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//! Is the partition Mounted
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bool IsMounted(int pos);
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//! Mount a specific Partition
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bool Mount(int pos, const char * name);
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//! UnMount a specific Partition
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void UnMount(int pos);
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//! UnMount all Partition
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void UnMountAll() { for(u32 i = 0; i < PartitionList.size(); ++i) UnMount(i); };
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//! Get the Mountname
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const char * MountName(int pos) { if(pos < 0 || pos >= (int) MountNameList.size() || !MountNameList[pos].size()) return ""; else return MountNameList[pos].c_str(); };
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//! Get the Name of the FileSystem e.g. "FAT32"
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const char * GetFSName(int pos) { if(valid(pos)) return PartitionList[pos].FSName; else return ""; };
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//! Get the LBA where the partition is located
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u32 GetLBAStart(int pos) { if(valid(pos)) return PartitionList[pos].LBA_Start; else return 0; };
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//! Get the partition size in sectors of this partition
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u32 GetSecCount(int pos) { if(valid(pos)) return PartitionList[pos].SecCount; else return 0; };
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//! Check if the partition is Active or NonBootable
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bool IsActive(int pos) { if(valid(pos)) return PartitionList[pos].Bootable; else return false; };
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//! Get the partition type
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int GetPartitionType(int pos) { if(valid(pos)) return PartitionList[pos].PartitionType; else return -1; };
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//! Get the entrie number in MBR of this partition
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int GetPartitionNum(int pos) { if(valid(pos)) return PartitionList[pos].PartitionNum; else return -1; };
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//! Get the EBR sector where this partition is described
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int GetEBRSector(int pos) { if(valid(pos)) return PartitionList[pos].EBR_Sector; else return 0; };
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//! Get the count of found partitions
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int GetPartitionCount() { return PartitionList.size(); };
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//! Get the partition size in bytes
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u64 GetSize(int pos) { if(valid(pos)) return (u64) PartitionList[pos].SecCount*BYTES_PER_SECTOR; else return 0; };
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//! Get the wbfs mount handle
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wbfs_t * GetWbfsHandle(int pos) { if(valid(pos)) return PartitionList[pos].wbfshandle; else return 0; };
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//! Set the wbfs mount handle
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bool SetWbfsHandle(int pos, wbfs_t * wbfshandle) { if(valid(pos)) {PartitionList[pos].wbfshandle = wbfshandle; return true;} else return false; };
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//! Get the whole partition record struct
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PartitionFS * GetPartitionRecord(int pos) { if(valid(pos)) return &PartitionList[pos]; else return NULL; };
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//! Get the disc interface of this handle
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const DISC_INTERFACE * GetDiscInterface() { return interface; };
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protected:
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bool valid(int pos) { return (pos >= 0 && pos < (int) PartitionList.size()); }
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bool CheckRAW(VOLUME_BOOT_RECORD * vbr);
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int FindPartitions();
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void CheckEBR(u8 PartNum, sec_t ebr_lba);
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bool CheckGPT(void);
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const DISC_INTERFACE *interface;
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safe_vector<PartitionFS> PartitionList;
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safe_vector<std::string> MountNameList;
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};
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#endif
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