usbloadergx/source/usbloader/partition_usbloader.c

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// Modified by oggzee
#include <stdio.h>
#include <string.h>
#include <ogcsys.h>
#include <unistd.h>
#include "partition_usbloader.h"
#include "sdhc.h"
#include "usbstorage.h"
#include "utils.h"
#include "wbfs.h"
#include "libwbfs/libwbfs.h"
/* 'partition table' structure */
typedef struct {
/* Zero bytes */
u8 padding[446];
/* Partition table entries */
partitionEntry entries[MAX_PARTITIONS];
} ATTRIBUTE_PACKED partitionTable;
s32 Partition_GetEntries(u32 device, partitionEntry *outbuf, u32 *outval)
{
static partitionTable table ATTRIBUTE_ALIGN(32);
u32 cnt, sector_size;
s32 ret;
/* Read from specified device */
switch (device) {
case WBFS_DEVICE_USB: {
/* Get sector size */
ret = USBStorage_GetCapacity(&sector_size);
if (ret == 0)
return -1;
/* Read partition table */
ret = USBStorage_ReadSectors(0, 1, &table);
if (ret < 0)
return ret;
break;
}
case WBFS_DEVICE_SDHC: {
/* SDHC sector size */
sector_size = SDHC_SECTOR_SIZE;
/* Read partition table */
ret = SDHC_ReadSectors(0, 1, &table);
if (!ret)
return -1;
break;
}
default:
return -1;
}
/* Swap endianess */
for (cnt = 0; cnt < 4; cnt++) {
partitionEntry *entry = &table.entries[cnt];
entry->sector = swap32(entry->sector);
entry->size = swap32(entry->size);
}
/* Set partition entries */
memcpy(outbuf, table.entries, sizeof(table.entries));
/* Set sector size */
*outval = sector_size;
return 0;
}
bool Device_ReadSectors(u32 device, u32 sector, u32 count, void *buffer)
{
s32 ret;
/* Read from specified device */
switch (device) {
case WBFS_DEVICE_USB:
ret = USBStorage_ReadSectors(sector, count, buffer);
if (ret < 0)
return false;
return true;
case WBFS_DEVICE_SDHC:
return SDHC_ReadSectors(sector, count, buffer);
}
return false;
}
bool Device_WriteSectors(u32 device, u32 sector, u32 count, void *buffer)
{
s32 ret;
/* Read from specified device */
switch (device) {
case WBFS_DEVICE_USB:
ret = USBStorage_WriteSectors(sector, count, buffer);
if (ret < 0)
return false;
return true;
case WBFS_DEVICE_SDHC:
return SDHC_WriteSectors(sector, count, buffer);
}
return false;
}
s32 Partition_GetEntriesEx(u32 device, partitionEntry *outbuf, u32 *psect_size, u8 *num)
{
static partitionTable table ATTRIBUTE_ALIGN(32);
partitionEntry *entry;
u32 i, sector_size;
s32 ret;
int maxpart = *num;
// Get sector size
switch (device) {
case WBFS_DEVICE_USB:
ret = USBStorage_GetCapacity(&sector_size);
if (ret == 0) return -1;
break;
case WBFS_DEVICE_SDHC:
sector_size = SDHC_SECTOR_SIZE;
break;
default:
return -1;
}
/* Set sector size */
*psect_size = sector_size;
u32 ext = 0;
u32 next = 0;
// Read partition table
ret = Device_ReadSectors(device, 0, 1, &table);
if (!ret) return -1;
// Check if it's a RAW WBFS disc, without partition table
if (get_fs_type(&table) == FS_TYPE_WBFS) {
memset(outbuf, 0, sizeof(table.entries));
wbfs_head_t *head = (wbfs_head_t*)&table;
outbuf->size = wbfs_ntohl(head->n_hd_sec);
*num = 1;
return 0;
}
/* Swap endianess */
for (i = 0; i < 4; i++) {
entry = &table.entries[i];
entry->sector = swap32(entry->sector);
entry->size = swap32(entry->size);
if (!ext && part_is_extended(entry->type)) {
ext = entry->sector;
}
}
/* Set partition entries */
memcpy(outbuf, table.entries, sizeof(table.entries));
// num primary
*num = 4;
if (!ext) return 0;
next = ext;
// scan extended partition for logical
for(i=0; i<maxpart-4; i++) {
ret = Device_ReadSectors(device, next, 1, &table);
if (!ret) break;
if (i == 0) {
// handle the invalid scenario where wbfs is on an EXTENDED
// partition instead of on the Logical inside Extended.
if (get_fs_type(&table) == FS_TYPE_WBFS) break;
}
entry = &table.entries[0];
entry->sector = swap32(entry->sector);
entry->size = swap32(entry->size);
if (entry->type && entry->size && entry->sector) {
// rebase to abolute address
entry->sector += next;
// add logical
memcpy(&outbuf[*num], entry, sizeof(*entry));
(*num)++;
// get next
entry++;
if (entry->type && entry->size && entry->sector) {
next = ext + swap32(entry->sector);
} else {
break;
}
}
}
return 0;
}
bool part_is_extended(int type)
{
if (type == 0x05) return true;
if (type == 0x0f) return true;
return false;
}
bool part_is_data(int type)
{
if (type && !part_is_extended(type)) return true;
return false;
}
bool part_valid_data(partitionEntry *entry)
{
if (entry->size && entry->type && entry->sector) {
return part_is_data(entry->type);
}
return false;
}
char* part_type_data(int type)
{
switch (type) {
case 0x01: return "FAT12";
case 0x04: return "FAT16";
case 0x06: return "FAT16"; //+
case 0x07: return "NTFS";
case 0x0b: return "FAT32";
case 0x0c: return "FAT32";
case 0x0e: return "FAT16";
case 0x82: return "LxSWP";
case 0x83: return "LINUX";
case 0x8e: return "LxLVM";
case 0xa8: return "OSX";
case 0xab: return "OSXBT";
case 0xaf: return "OSXHF";
case 0xe8: return "LUKS";
}
return NULL;
}
char *part_type_name(int type)
{
static char unk[8];
if (type == 0) return "UNUSED";
if (part_is_extended(type)) return "EXTEND";
char *p = part_type_data(type);
if (p) return p;
sprintf(unk, "UNK-%02x", type);
return unk;
}
int get_fs_type(void *buff)
{
char *buf = buff;
// WBFS
wbfs_head_t *head = (wbfs_head_t *)buff;
if (head->magic == wbfs_htonl(WBFS_MAGIC)) return FS_TYPE_WBFS;
// 55AA
if (buf[0x1FE] == 0x55 && buf[0x1FF] == 0xAA) {
// FAT
if (memcmp(buf+0x36,"FAT",3) == 0) return FS_TYPE_FAT16;
if (memcmp(buf+0x52,"FAT",3) == 0) return FS_TYPE_FAT32;
// NTFS
if (memcmp(buf+0x03,"NTFS",4) == 0) return FS_TYPE_NTFS;
}
return FS_TYPE_UNK;
}
int get_part_fs(int fs_type)
{
switch(fs_type) {
case FS_TYPE_FAT32: return PART_FS_FAT;
case FS_TYPE_NTFS: return PART_FS_NTFS;
case FS_TYPE_WBFS: return PART_FS_WBFS;
default: return -1;
}
}
bool is_type_fat(int type)
{
return (type == FS_TYPE_FAT16 || type == FS_TYPE_FAT32);
}
char *get_fs_name(int i)
{
switch (i) {
case FS_TYPE_FAT16: return "FAT16";
case FS_TYPE_FAT32: return "FAT32";
case FS_TYPE_NTFS: return "NTFS";
case FS_TYPE_WBFS: return "WBFS";
}
return "";
}
s32 Partition_GetList(u32 device, PartList *plist)
{
partitionEntry *entry = NULL;
PartInfo *pinfo = NULL;
int i, ret;
memset(plist, 0, sizeof(PartList));
// Get partition entries
plist->num = MAX_PARTITIONS_EX;
ret = Partition_GetEntriesEx(device, plist->pentry, &plist->sector_size, &plist->num);
if (ret < 0) {
return -1;
}
// check for RAW WBFS disc
if (plist->num == 1) {
pinfo = &plist->pinfo[0];
entry = &plist->pentry[0];
plist->wbfs_n = 1;
pinfo->wbfs_i = pinfo->index = 1;
return 0;
}
char buf[plist->sector_size];
// scan partitions for filesystem type
for (i = 0; i < plist->num; i++) {
pinfo = &plist->pinfo[i];
entry = &plist->pentry[i];
if (!entry->size) continue;
if (!entry->type) continue;
if (!entry->sector) continue;
// even though wrong, it's possible WBFS is on an extended part.
//if (!part_is_data(entry->type)) continue;
if (!Device_ReadSectors(device, entry->sector, 1, buf)) continue;
pinfo->fs_type = get_fs_type(buf);
if (pinfo->fs_type == FS_TYPE_WBFS) {
// multiple wbfs on sdhc not supported
if (device == WBFS_DEVICE_SDHC && (plist->wbfs_n > 1 || i > 4)) continue;
plist->wbfs_n++;
pinfo->wbfs_i = pinfo->index = plist->wbfs_n;
} else if (is_type_fat(pinfo->fs_type)) {
plist->fat_n++;
pinfo->fat_i = pinfo->index = plist->fat_n;
} else if (pinfo->fs_type == FS_TYPE_NTFS) {
plist->ntfs_n++;
pinfo->ntfs_i = pinfo->index = plist->ntfs_n;
}
pinfo->part_fs = get_part_fs(pinfo->fs_type);
}
return 0;
}
int Partition_FixEXT(u32 device, u8 part)
{
static partitionTable table ATTRIBUTE_ALIGN(32);
int ret;
if (part > 3) return -1;
// Read partition table
ret = Device_ReadSectors(device, 0, 1, &table);
if (!ret) return -1;
if (part_is_extended(table.entries[part].type)) {
table.entries[part].type = 0x0b; // FAT32
ret = Device_WriteSectors(device, 0, 1, &table);
if (!ret) return -1;
return 0;
}
return -1;
}