mirror of
https://github.com/wiidev/usbloadergx.git
synced 2024-11-18 17:29:17 +01:00
405 lines
10 KiB
C
405 lines
10 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 "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 )
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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 )
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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 )
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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 )
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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 )
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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 partitionTable table ATTRIBUTE_ALIGN( 32 );
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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( &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* ) & table;
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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( &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: return "FAT12";
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case 0x04: return "FAT16";
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case 0x06: return "FAT16"; //+
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case 0x07: return "NTFS";
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case 0x0b: return "FAT32";
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case 0x0c: return "FAT32";
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case 0x0e: return "FAT16";
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case 0x82: return "LxSWP";
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case 0x83: return "LINUX";
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case 0x8e: return "LxLVM";
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case 0xa8: return "OSX";
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case 0xab: return "OSXBT";
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case 0xaf: return "OSXHF";
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case 0xe8: 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( void *buff )
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{
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char *buf = buff;
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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 ( buf[0x1FE] == 0x55 && buf[0x1FF] == 0xAA )
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{
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// FAT
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if ( memcmp( buf + 0x36, "FAT", 3 ) == 0 ) return FS_TYPE_FAT16;
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if ( memcmp( buf + 0x52, "FAT", 3 ) == 0 ) return FS_TYPE_FAT32;
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// NTFS
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if ( memcmp( buf + 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: return PART_FS_FAT;
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case FS_TYPE_NTFS: return PART_FS_NTFS;
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case FS_TYPE_WBFS: return PART_FS_WBFS;
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default: 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: return "FAT16";
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case FS_TYPE_FAT32: return "FAT32";
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case FS_TYPE_NTFS: return "NTFS";
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case FS_TYPE_WBFS: 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( 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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