mirror of
https://github.com/wiidev/usbloadergx.git
synced 2024-11-18 09:19:17 +01:00
418 lines
9.9 KiB
C
418 lines
9.9 KiB
C
// Modified by oggzee
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#include <stdio.h>
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#include <string.h>
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#include <ogcsys.h>
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#include <unistd.h>
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#include "partition_usbloader.h"
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#include "sdhc.h"
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#include "usbstorage2.h"
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#include "utils.h"
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#include "wbfs.h"
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#include "libs/libwbfs/libwbfs.h"
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/* 'partition table' structure */
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typedef struct
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{
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/* Zero bytes */
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u8 padding[446];
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/* Partition table entries */
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partitionEntry entries[MAX_PARTITIONS];
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}ATTRIBUTE_PACKED partitionTable;
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s32 Partition_GetEntries(u32 device, partitionEntry *outbuf, u32 *outval)
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{
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static partitionTable table ATTRIBUTE_ALIGN( 32 );
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u32 cnt, sector_size;
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s32 ret;
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/* Read from specified device */
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switch (device)
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{
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case WBFS_DEVICE_USB:
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{
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/* Get sector size */
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ret = USBStorage2_GetCapacity(§or_size);
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if (ret == 0) return -1;
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/* Read partition table */
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ret = USBStorage2_ReadSectors(0, 1, &table);
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if (ret < 0) return ret;
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break;
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}
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case WBFS_DEVICE_SDHC:
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{
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/* SDHC sector size */
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sector_size = SDHC_SECTOR_SIZE;
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/* Read partition table */
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ret = SDHC_ReadSectors(0, 1, &table);
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if (!ret) return -1;
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break;
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}
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default:
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return -1;
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}
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/* Swap endianess */
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for (cnt = 0; cnt < 4; cnt++)
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{
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partitionEntry *entry = &table.entries[cnt];
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entry->sector = swap32(entry->sector);
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entry->size = swap32(entry->size);
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}
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/* Set partition entries */
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memcpy(outbuf, table.entries, sizeof(table.entries));
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/* Set sector size */
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*outval = sector_size;
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return 0;
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}
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bool Device_ReadSectors(u32 device, u32 sector, u32 count, void *buffer)
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{
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s32 ret;
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/* Read from specified device */
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switch (device)
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{
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case WBFS_DEVICE_USB:
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ret = USBStorage2_ReadSectors(sector, count, buffer);
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if (ret < 0) return false;
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return true;
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case WBFS_DEVICE_SDHC:
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return SDHC_ReadSectors(sector, count, buffer);
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}
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return false;
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}
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bool Device_WriteSectors(u32 device, u32 sector, u32 count, void *buffer)
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{
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s32 ret;
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/* Read from specified device */
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switch (device)
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{
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case WBFS_DEVICE_USB:
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ret = USBStorage2_WriteSectors(sector, count, buffer);
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if (ret < 0) return false;
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return true;
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case WBFS_DEVICE_SDHC:
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return SDHC_WriteSectors(sector, count, buffer);
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}
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return false;
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}
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s32 Partition_GetEntriesEx(u32 device, partitionEntry *outbuf, u32 *psect_size, u8 *num)
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{
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static u8 Buffer[sizeof(partitionTable)] ATTRIBUTE_ALIGN( 32 );
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partitionTable *table = (partitionTable *) Buffer;
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partitionEntry *entry;
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u32 i, sector_size;
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s32 ret;
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int maxpart = *num;
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// Get sector size
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switch (device)
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{
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case WBFS_DEVICE_USB:
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ret = USBStorage2_GetCapacity(§or_size);
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if (ret == 0) return -1;
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break;
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case WBFS_DEVICE_SDHC:
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sector_size = SDHC_SECTOR_SIZE;
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break;
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default:
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return -1;
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}
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/* Set sector size */
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*psect_size = sector_size;
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u32 ext = 0;
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u32 next = 0;
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// Read partition table
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ret = Device_ReadSectors(device, 0, 1, table);
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if (!ret) return -1;
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// Check if it's a RAW WBFS disc, without partition table
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if (get_fs_type((u8 *) table) == FS_TYPE_WBFS)
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{
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memset(outbuf, 0, sizeof(table->entries));
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wbfs_head_t * head = (wbfs_head_t *) Buffer;
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outbuf->size = wbfs_ntohl( head->n_hd_sec );
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*num = 1;
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return 0;
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}
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/* Swap endianess */
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for (i = 0; i < 4; i++)
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{
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entry = &table->entries[i];
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entry->sector = swap32(entry->sector);
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entry->size = swap32(entry->size);
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if (!ext && part_is_extended(entry->type))
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{
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ext = entry->sector;
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}
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}
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/* Set partition entries */
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memcpy(outbuf, table->entries, sizeof(table->entries));
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// num primary
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*num = 4;
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if (!ext) return 0;
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next = ext;
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// scan extended partition for logical
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for (i = 0; i < maxpart - 4; i++)
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{
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ret = Device_ReadSectors(device, next, 1, table);
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if (!ret) break;
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if (i == 0)
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{
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// handle the invalid scenario where wbfs is on an EXTENDED
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// partition instead of on the Logical inside Extended.
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if (get_fs_type((u8 *) table) == FS_TYPE_WBFS) break;
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}
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entry = &table->entries[0];
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entry->sector = swap32(entry->sector);
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entry->size = swap32(entry->size);
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if (entry->type && entry->size && entry->sector)
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{
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// rebase to abolute address
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entry->sector += next;
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// add logical
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memcpy(&outbuf[*num], entry, sizeof(*entry));
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(*num)++;
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// get next
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entry++;
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if (entry->type && entry->size && entry->sector)
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{
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next = ext + swap32(entry->sector);
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}
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else
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{
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break;
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}
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}
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}
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return 0;
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}
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bool part_is_extended(int type)
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{
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if (type == 0x05) return true;
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if (type == 0x0f) return true;
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return false;
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}
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bool part_is_data(int type)
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{
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if (type && !part_is_extended(type)) return true;
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return false;
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}
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bool part_valid_data(partitionEntry *entry)
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{
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if (entry->size && entry->type && entry->sector)
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{
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return part_is_data(entry->type);
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}
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return false;
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}
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char* part_type_data(int type)
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{
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switch (type)
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{
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case 0x01:
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return "FAT12";
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case 0x04:
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return "FAT16";
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case 0x06:
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return "FAT16"; //+
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case 0x07:
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return "NTFS";
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case 0x0b:
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return "FAT32";
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case 0x0c:
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return "FAT32";
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case 0x0e:
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return "FAT16";
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case 0x82:
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return "LxSWP";
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case 0x83:
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return "LINUX";
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case 0x8e:
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return "LxLVM";
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case 0xa8:
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return "OSX";
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case 0xab:
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return "OSXBT";
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case 0xaf:
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return "OSXHF";
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case 0xe8:
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return "LUKS";
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}
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return NULL;
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}
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char *part_type_name(int type)
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{
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static char unk[8];
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if (type == 0) return "UNUSED";
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if (part_is_extended(type)) return "EXTEND";
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char *p = part_type_data(type);
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if (p) return p;
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sprintf(unk, "UNK-%02x", type);
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return unk;
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}
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int get_fs_type(u8 *buff)
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{
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// WBFS
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wbfs_head_t *head = (wbfs_head_t *) buff;
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if (head->magic == wbfs_htonl( WBFS_MAGIC )) return FS_TYPE_WBFS;
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// 55AA
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if (buff[0x1FE] == 0x55 && buff[0x1FF] == 0xAA)
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{
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// FAT
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if (memcmp(buff + 0x36, "FAT", 3) == 0) return FS_TYPE_FAT16;
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if (memcmp(buff + 0x52, "FAT", 3) == 0) return FS_TYPE_FAT32;
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// NTFS
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if (memcmp(buff + 0x03, "NTFS", 4) == 0) return FS_TYPE_NTFS;
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}
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return FS_TYPE_UNK;
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}
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int get_part_fs(int fs_type)
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{
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switch (fs_type)
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{
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case FS_TYPE_FAT32:
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return PART_FS_FAT;
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case FS_TYPE_NTFS:
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return PART_FS_NTFS;
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case FS_TYPE_WBFS:
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return PART_FS_WBFS;
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default:
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return -1;
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}
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}
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bool is_type_fat(int type)
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{
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return (type == FS_TYPE_FAT16 || type == FS_TYPE_FAT32);
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}
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char *get_fs_name(int i)
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{
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switch (i)
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{
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case FS_TYPE_FAT16:
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return "FAT16";
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case FS_TYPE_FAT32:
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return "FAT32";
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case FS_TYPE_NTFS:
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return "NTFS";
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case FS_TYPE_WBFS:
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return "WBFS";
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}
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return "";
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}
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s32 Partition_GetList(u32 device, PartList *plist)
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{
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partitionEntry *entry = NULL;
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PartInfo *pinfo = NULL;
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int i, ret;
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memset(plist, 0, sizeof(PartList));
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// Get partition entries
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plist->num = MAX_PARTITIONS_EX;
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ret = Partition_GetEntriesEx(device, plist->pentry, &plist->sector_size, &plist->num);
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if (ret < 0)
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{
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return -1;
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}
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// check for RAW WBFS disc
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if (plist->num == 1)
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{
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pinfo = &plist->pinfo[0];
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entry = &plist->pentry[0];
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plist->wbfs_n = 1;
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pinfo->wbfs_i = pinfo->index = 1;
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return 0;
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}
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char buf[plist->sector_size];
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// scan partitions for filesystem type
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for (i = 0; i < plist->num; i++)
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{
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pinfo = &plist->pinfo[i];
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entry = &plist->pentry[i];
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if (!entry->size) continue;
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if (!entry->type) continue;
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if (!entry->sector) continue;
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// even though wrong, it's possible WBFS is on an extended part.
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//if (!part_is_data(entry->type)) continue;
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if (!Device_ReadSectors(device, entry->sector, 1, buf)) continue;
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pinfo->fs_type = get_fs_type((u8 *) buf);
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if (pinfo->fs_type == FS_TYPE_WBFS)
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{
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// multiple wbfs on sdhc not supported
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if (device == WBFS_DEVICE_SDHC && (plist->wbfs_n > 1 || i > 4)) continue;
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plist->wbfs_n++;
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pinfo->wbfs_i = pinfo->index = plist->wbfs_n;
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}
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else if (is_type_fat(pinfo->fs_type))
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{
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plist->fat_n++;
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pinfo->fat_i = pinfo->index = plist->fat_n;
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}
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else if (pinfo->fs_type == FS_TYPE_NTFS)
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{
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plist->ntfs_n++;
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pinfo->ntfs_i = pinfo->index = plist->ntfs_n;
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}
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pinfo->part_fs = get_part_fs(pinfo->fs_type);
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}
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return 0;
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}
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int Partition_FixEXT(u32 device, u8 part)
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{
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static partitionTable table ATTRIBUTE_ALIGN( 32 );
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int ret;
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if (part > 3) return -1;
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// Read partition table
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ret = Device_ReadSectors(device, 0, 1, &table);
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if (!ret) return -1;
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if (part_is_extended(table.entries[part].type))
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{
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table.entries[part].type = 0x0b; // FAT32
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ret = Device_WriteSectors(device, 0, 1, &table);
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if (!ret) return -1;
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return 0;
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}
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return -1;
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}
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