CfgUSBLoader/cios/sdhc/libwbfs/libwbfs.c

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// Copyright 2009 Kwiirk
// Licensed under the terms of the GNU GPL, version 2
// http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
#include "libwbfs.h"
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#define ERROR(x) do {wbfs_error(x);goto error;}while(0)
#define ALIGN_LBA(x) (((x)+p->hd_sec_sz-1)&(~(p->hd_sec_sz-1)))
static int force_mode=0;
void wbfs_set_force_mode(int force)
{
force_mode = force;
}
static u8 size_to_shift(u32 size)
{
u8 ret = 0;
while(size)
{
ret++;
size>>=1;
}
return ret-1;
}
#define read_le32_unaligned(x) ((x)[0]|((x)[1]<<8)|((x)[2]<<16)|((x)[3]<<24))
wbfs_t*wbfs_open_hd(rw_sector_callback_t read_hdsector,
rw_sector_callback_t write_hdsector,
void *callback_data,
int hd_sector_size, int num_hd_sector __attribute((unused)), int reset)
{
int i=num_hd_sector,ret;
u8 *ptr,*tmp_buffer = wbfs_ioalloc(hd_sector_size);
u8 part_table[16*4];
ret = read_hdsector(callback_data,0,1,tmp_buffer);
if(ret)
return 0;
//find wbfs partition
wbfs_memcpy(part_table,tmp_buffer+0x1be,16*4);
ptr = part_table;
for(i=0;i<4;i++,ptr+=16)
{
u32 part_lba = read_le32_unaligned(ptr+0x8);
wbfs_head_t *head = (wbfs_head_t *)tmp_buffer;
ret = read_hdsector(callback_data,part_lba,1,tmp_buffer);
// verify there is the magic.
if (head->magic == wbfs_htonl(WBFS_MAGIC))
{
wbfs_t*p = wbfs_open_partition(read_hdsector,write_hdsector,
callback_data,hd_sector_size,0,part_lba,reset);
wbfs_iofree(tmp_buffer);
return p;
}
}
if(reset)// XXX make a empty hd partition..
{
}
return 0;
}
wbfs_t*wbfs_open_partition(rw_sector_callback_t read_hdsector,
rw_sector_callback_t write_hdsector,
void *callback_data,
int hd_sector_size, int num_hd_sector, u32 part_lba, int reset)
{
wbfs_t *p = wbfs_malloc(sizeof(wbfs_t));
wbfs_head_t *head = wbfs_ioalloc(hd_sector_size?hd_sector_size:512);
//constants, but put here for consistancy
p->wii_sec_sz = 0x8000;
p->wii_sec_sz_s = size_to_shift(0x8000);
p->n_wii_sec = (num_hd_sector/0x8000)*hd_sector_size;
p->n_wii_sec_per_disc = 143432*2;//support for double layers discs..
p->head = head;
p->part_lba = part_lba;
// init the partition
if (reset)
{
u8 sz_s;
wbfs_memset(head,0,hd_sector_size);
head->magic = wbfs_htonl(WBFS_MAGIC);
head->hd_sec_sz_s = size_to_shift(hd_sector_size);
head->n_hd_sec = wbfs_htonl(num_hd_sector);
// choose minimum wblk_sz that fits this partition size
for(sz_s=6;sz_s<11;sz_s++)
{
// ensure that wbfs_sec_sz is big enough to address every blocks using 16 bits
if(p->n_wii_sec <((1U<<16)*(1<<sz_s)))
break;
}
head->wbfs_sec_sz_s = sz_s+p->wii_sec_sz_s;
}else
read_hdsector(callback_data,p->part_lba,1,head);
if (head->magic != wbfs_htonl(WBFS_MAGIC))
ERROR("bad magic");
if(!force_mode && hd_sector_size && head->hd_sec_sz_s != size_to_shift(hd_sector_size))
ERROR("hd sector size doesn't match");
if(!force_mode && num_hd_sector && head->n_hd_sec != wbfs_htonl(num_hd_sector))
ERROR("hd num sector doesn't match");
p->hd_sec_sz = 1<<head->hd_sec_sz_s;
p->hd_sec_sz_s = head->hd_sec_sz_s;
p->n_hd_sec = wbfs_ntohl(head->n_hd_sec);
p->n_wii_sec = (p->n_hd_sec/p->wii_sec_sz)*(p->hd_sec_sz);
p->wbfs_sec_sz_s = head->wbfs_sec_sz_s;
p->wbfs_sec_sz = 1<<p->wbfs_sec_sz_s;
p->n_wbfs_sec = p->n_wii_sec >> (p->wbfs_sec_sz_s - p->wii_sec_sz_s);
p->n_wbfs_sec_per_disc = p->n_wii_sec_per_disc >> (p->wbfs_sec_sz_s - p->wii_sec_sz_s);
p->disc_info_sz = ALIGN_LBA(sizeof(wbfs_disc_info_t) + p->n_wbfs_sec_per_disc*2);
//printf("hd_sector_size %X wii_sector size %X wbfs sector_size %X\n",p->hd_sec_sz,p->wii_sec_sz,p->wbfs_sec_sz);
p->read_hdsector = read_hdsector;
p->write_hdsector = write_hdsector;
p->callback_data = callback_data;
p->freeblks_lba = (p->wbfs_sec_sz - p->n_wbfs_sec/8)>>p->hd_sec_sz_s;
if(!reset)
p->freeblks = 0; // will alloc and read only if needed
else
{
// init with all free blocks
p->freeblks = wbfs_ioalloc(ALIGN_LBA(p->n_wbfs_sec/8));
wbfs_memset(p->freeblks,0xff,p->n_wbfs_sec/8);
}
p->max_disc = (p->freeblks_lba-1)/(p->disc_info_sz>>p->hd_sec_sz_s);
if(p->max_disc > p->hd_sec_sz - sizeof(wbfs_head_t))
p->max_disc = p->hd_sec_sz - sizeof(wbfs_head_t);
p->tmp_buffer = wbfs_ioalloc(p->hd_sec_sz);
p->n_disc_open = 0;
return p;
error:
wbfs_free(p);
wbfs_iofree(head);
return 0;
}
void wbfs_sync(wbfs_t*p)
{
// copy back descriptors
if(p->write_hdsector){
p->write_hdsector(p->callback_data,p->part_lba+0,1, p->head);
if(p->freeblks)
p->write_hdsector(p->callback_data,p->part_lba+p->freeblks_lba,ALIGN_LBA(p->n_wbfs_sec/8)>>p->hd_sec_sz_s, p->freeblks);
}
}
void wbfs_close(wbfs_t*p)
{
wbfs_sync(p);
if(p->n_disc_open)
ERROR("trying to close wbfs while discs still open");
wbfs_iofree(p->head);
wbfs_iofree(p->tmp_buffer);
if(p->freeblks)
wbfs_iofree(p->freeblks);
wbfs_free(p);
error:
return;
}
wbfs_disc_t *wbfs_open_disc(wbfs_t* p, u8 *discid)
{
u32 i;
int disc_info_sz_lba = p->disc_info_sz>>p->hd_sec_sz_s;
wbfs_disc_t *d = 0;
for(i=0;i<p->max_disc;i++)
{
if (p->head->disc_table[i]){
p->read_hdsector(p->callback_data,
p->part_lba+1+i*disc_info_sz_lba,1,p->tmp_buffer);
if(wbfs_memcmp(discid,p->tmp_buffer,6)==0){
d = wbfs_malloc(sizeof(*d));
if(!d)
ERROR("allocating memory");
d->p = p;
d->i = i;
d->header = wbfs_ioalloc(p->disc_info_sz);
if(!d->header)
ERROR("allocating memory");
p->read_hdsector(p->callback_data,
p->part_lba+1+i*disc_info_sz_lba,
disc_info_sz_lba,d->header);
p->n_disc_open ++;
// for(i=0;i<p->n_wbfs_sec_per_disc;i++)
// printf("%d,",wbfs_ntohs(d->header->wlba_table[i]));
return d;
}
}
}
return 0;
error:
if(d)
wbfs_iofree(d);
return 0;
}
void wbfs_close_disc(wbfs_disc_t*d)
{
d->p->n_disc_open --;
wbfs_iofree(d->header);
wbfs_free(d);
}
// offset is pointing 32bit words to address the whole dvd, although len is in bytes
int wbfs_disc_read(wbfs_disc_t*d,u32 offset, u8 *data, u32 len)
{
wbfs_t *p = d->p;
u16 wlba = offset>>(p->wbfs_sec_sz_s-2);
u32 iwlba_shift = p->wbfs_sec_sz_s - p->hd_sec_sz_s;
u32 lba_mask = (p->wbfs_sec_sz-1)>>(p->hd_sec_sz_s);
u32 lba = (offset>>(p->hd_sec_sz_s-2))&lba_mask;
u32 off = offset&((p->hd_sec_sz>>2)-1);
u16 iwlba = wbfs_ntohs(d->header->wlba_table[wlba]);
u32 len_copied;
int err = 0;
u8 *ptr = data;
if(unlikely(iwlba==0))
return 1;
if(unlikely(off)){
off*=4;
err = p->read_hdsector(p->callback_data,
p->part_lba + (iwlba<<iwlba_shift) + lba, 1, p->tmp_buffer);
if(err)
return err;
len_copied = p->hd_sec_sz - off;
if(likely(len < len_copied))
len_copied = len;
wbfs_memcpy(ptr, p->tmp_buffer + off, len_copied);
len -= len_copied;
ptr += len_copied;
lba++;
if(unlikely(lba>lba_mask && len)){
lba=0;
iwlba = wbfs_ntohs(d->header->wlba_table[++wlba]);
if(unlikely(iwlba==0))
return 1;
}
}
while(likely(len>=p->hd_sec_sz))
{
u32 nlb = len>>(p->hd_sec_sz_s);
if(unlikely(lba + nlb > p->wbfs_sec_sz)) // dont cross wbfs sectors..
nlb = p->wbfs_sec_sz-lba;
err = p->read_hdsector(p->callback_data,
p->part_lba + (iwlba<<iwlba_shift) + lba, nlb, ptr);
if(err)
return err;
len -= nlb<<p->hd_sec_sz_s;
ptr += nlb<<p->hd_sec_sz_s;
lba += nlb;
if(unlikely(lba>lba_mask && len)){
lba = 0;
iwlba =wbfs_ntohs(d->header->wlba_table[++wlba]);
if(unlikely(iwlba==0))
return 1;
}
}
if(unlikely(len)){
err = p->read_hdsector(p->callback_data,
p->part_lba + (iwlba<<iwlba_shift) + lba, 1, p->tmp_buffer);
if(err)
return err;
wbfs_memcpy(ptr, p->tmp_buffer, len);
}
return 0;
}
// disc listing
u32 wbfs_count_discs(wbfs_t*p)
{
u32 i,count=0;
for(i=0;i<p->max_disc;i++)
if (p->head->disc_table[i])
count++;
return count;
}
static u32 wbfs_sector_used(wbfs_t *p,wbfs_disc_info_t *di)
{
u32 tot_blk=0,j;
for(j=0;j<p->n_wbfs_sec_per_disc;j++)
if(wbfs_ntohs(di->wlba_table[j]))
tot_blk++;
return tot_blk;
}
u32 wbfs_get_disc_info(wbfs_t*p, u32 index,u8 *header,int header_size,u32 *size)//size in 32 bit
{
u32 i,count=0;
int disc_info_sz_lba = p->disc_info_sz>>p->hd_sec_sz_s;
for(i=0;i<p->max_disc;i++)
if (p->head->disc_table[i]){
if(count++==index)
{
p->read_hdsector(p->callback_data,
p->part_lba+1+i*disc_info_sz_lba,1,p->tmp_buffer);
if(header_size > (int)p->hd_sec_sz)
header_size = p->hd_sec_sz;
u32 magic = wbfs_ntohl(*(u32*)(p->tmp_buffer+24));
if(magic!=0x5D1C9EA3){
p->head->disc_table[i]=0;
return 1;
}
memcpy(header,p->tmp_buffer,header_size);
if(size)
{
u8 *header = wbfs_ioalloc(p->disc_info_sz);
p->read_hdsector(p->callback_data,
p->part_lba+1+i*disc_info_sz_lba,disc_info_sz_lba,header);
u32 sec_used = wbfs_sector_used(p,(wbfs_disc_info_t *)header);
wbfs_iofree(header);
*size = sec_used<<(p->wbfs_sec_sz_s-2);
}
return 0;
}
}
return 1;
}
static void load_freeblocks(wbfs_t*p)
{
if(p->freeblks)
return;
// XXX should handle malloc error..
p->freeblks = wbfs_ioalloc(ALIGN_LBA(p->n_wbfs_sec/8));
p->read_hdsector(p->callback_data,p->part_lba+p->freeblks_lba,ALIGN_LBA(p->n_wbfs_sec/8)>>p->hd_sec_sz_s, p->freeblks);
}
u32 wbfs_count_usedblocks(wbfs_t*p)
{
u32 i,j,count=0;
load_freeblocks(p);
for(i=0;i<p->n_wbfs_sec/(8*4);i++)
{
u32 v = wbfs_ntohl(p->freeblks[i]);
if(v == ~0U)
count+=32;
else if(v!=0)
for(j=0;j<32;j++)
if (v & (1<<j))
count++;
}
return count;
}
// write access
static int block_used(u8 *used,u32 i,u32 wblk_sz)
{
u32 k;
i*=wblk_sz;
for(k=0;k<wblk_sz;k++)
if(i+k<143432*2 && used[i+k])
return 1;
return 0;
}
static u32 alloc_block(wbfs_t*p)
{
u32 i,j;
for(i=0;i<p->n_wbfs_sec/(8*4);i++)
{
u32 v = wbfs_ntohl(p->freeblks[i]);
if(v != 0)
{
for(j=0;j<32;j++)
if (v & (1<<j))
{
p->freeblks[i] = wbfs_htonl(v & ~(1<<j));
return (i*32)+j+1;
}
}
}
return ~0;
}
static void free_block(wbfs_t *p,int bl)
{
int i = bl/(32);
int j = bl&31;
u32 v = wbfs_ntohl(p->freeblks[i]);
p->freeblks[i] = wbfs_htonl(v | 1<<j);
}
u32 wbfs_add_disc(wbfs_t*p,read_wiidisc_callback_t read_src_wii_disc,
void *callback_data,progress_callback_t spinner,partition_selector_t sel,int copy_1_1)
{
int i,discn;
u32 tot,cur;
u32 wii_sec_per_wbfs_sect = 1<<(p->wbfs_sec_sz_s-p->wii_sec_sz_s);
wiidisc_t *d = 0;
u8 *used = 0;
wbfs_disc_info_t *info = 0;
u8* copy_buffer = 0;
used = wbfs_malloc(p->n_wii_sec_per_disc);
if(!used)
ERROR("unable to alloc memory");
if(!copy_1_1)
{
d = wd_open_disc(read_src_wii_disc,callback_data);
if(!d)
ERROR("unable to open wii disc");
wd_build_disc_usage(d,sel,used);
wd_close_disc(d);
d = 0;
}
for(i=0;i<p->max_disc;i++)// find a free slot.
if(p->head->disc_table[i]==0)
break;
if(i==p->max_disc)
ERROR("no space left on device (table full)");
p->head->disc_table[i] = 1;
discn = i;
load_freeblocks(p);
// build disc info
info = wbfs_ioalloc(p->disc_info_sz);
u8*b = (u8*)info;
read_src_wii_disc(callback_data,0,0x100,info->disc_header_copy);
fprintf(stderr, "adding %c%c%c%c%c%c %s...\n",b[0], b[1], b[2], b[3], b[4], b[5], b + 0x20);
copy_buffer = wbfs_ioalloc(p->wbfs_sec_sz);
if(!copy_buffer)
ERROR("alloc memory");
tot=0;
cur=0;
if(spinner){
// count total number to write for spinner
for(i=0; i<p->n_wbfs_sec_per_disc;i++)
if(copy_1_1 || block_used(used,i,wii_sec_per_wbfs_sect)) tot++;
spinner(0,tot);
}
for(i=0; i<p->n_wbfs_sec_per_disc;i++){
u16 bl = 0;
if(copy_1_1 || block_used(used,i,wii_sec_per_wbfs_sect)) {
bl = alloc_block(p);
if (bl==0xffff)
ERROR("no space left on device (disc full)");
read_src_wii_disc(callback_data,i*(p->wbfs_sec_sz>>2),p->wbfs_sec_sz,copy_buffer);
//fix the partition table.
if(i==(0x40000>>p->wbfs_sec_sz_s))
wd_fix_partition_table(d, sel, copy_buffer+(0x40000&(p->wbfs_sec_sz-1)));
p->write_hdsector(p->callback_data,p->part_lba+bl*(p->wbfs_sec_sz/p->hd_sec_sz),
p->wbfs_sec_sz/p->hd_sec_sz,copy_buffer);
cur++;
if(spinner)
spinner(cur,tot);
}
info->wlba_table[i] = wbfs_htons(bl);
}
// write disc info
int disc_info_sz_lba = p->disc_info_sz>>p->hd_sec_sz_s;
p->write_hdsector(p->callback_data,p->part_lba+1+discn*disc_info_sz_lba,disc_info_sz_lba,info);
wbfs_sync(p);
error:
if(d)
wd_close_disc(d);
if(used)
wbfs_free(used);
if(info)
wbfs_iofree(info);
if(copy_buffer)
wbfs_iofree(copy_buffer);
// init with all free blocks
return 0;
}
u32 wbfs_rm_disc(wbfs_t*p, u8* discid)
{
wbfs_disc_t *d = wbfs_open_disc(p,discid);
int i;
int discn = 0;
int disc_info_sz_lba = p->disc_info_sz>>p->hd_sec_sz_s;
if(!d)
return 1;
load_freeblocks(p);
discn = d->i;
for( i=0; i< p->n_wbfs_sec_per_disc; i++)
{
u32 iwlba = wbfs_ntohs(d->header->wlba_table[i]);
if (iwlba)
free_block(p,iwlba);
}
memset(d->header,0,p->disc_info_sz);
p->write_hdsector(p->callback_data,p->part_lba+1+discn*disc_info_sz_lba,disc_info_sz_lba,d->header);
p->head->disc_table[discn] = 0;
wbfs_close_disc(d);
wbfs_sync(p);
return 0;
}
// trim the file-system to its minimum size
u32 wbfs_trim(wbfs_t*p);
// data extraction
u32 wbfs_extract_disc(wbfs_disc_t*d, rw_sector_callback_t write_dst_wii_sector,void *callback_data,progress_callback_t spinner)
{
wbfs_t *p = d->p;
u8* copy_buffer = 0;
int i;
int src_wbs_nlb=p->wbfs_sec_sz/p->hd_sec_sz;
int dst_wbs_nlb=p->wbfs_sec_sz/p->wii_sec_sz;
copy_buffer = wbfs_ioalloc(p->wbfs_sec_sz);
if(!copy_buffer)
ERROR("alloc memory");
for( i=0; i< p->n_wbfs_sec_per_disc; i++)
{
u32 iwlba = wbfs_ntohs(d->header->wlba_table[i]);
if (iwlba)
{
if(spinner)
spinner(i,p->n_wbfs_sec_per_disc);
p->read_hdsector(p->callback_data, p->part_lba + iwlba*src_wbs_nlb, src_wbs_nlb, copy_buffer);
write_dst_wii_sector(callback_data, i*dst_wbs_nlb, dst_wbs_nlb, copy_buffer);
}
}
wbfs_iofree(copy_buffer);
return 0;
error:
return 1;
}
u32 wbfs_extract_file(wbfs_disc_t*d, char *path);