int cdfs_read_rawDATA_frame(struct super_block * sb, unsigned lba, unsigned char *buf)
{
struct buffer_head * bh;
printk("cddata.c:cdfs_read_rawDATA_frame():AnyoneUseThis???\n");
bh=cdfs_bread(sb, lba, CD_FRAMESIZE);
if (!bh) {
// dit gebeurt indien track1!=ISO is, bv. De Morgen CD
printk("cdfs_read_rawDATA(%x, %u, %x) FAILED!\n", (unsigned)sb, lba, (unsigned)buf);
} else {
memcpy(buf, bh->b_data, CD_FRAMESIZE);
brelse(bh);
}
return 0;
}
struct iso_primary_descriptor * cdfs_get_iso_info(struct super_block *sb, int track_no){
cd * this_cd = cdfs_info(sb);
struct buffer_head * bh;
int block;
struct iso_primary_descriptor * iso_info = NULL;
iso_info=(struct iso_primary_descriptor *)kmalloc(sizeof(struct iso_primary_descriptor), GFP_KERNEL);
if (iso_info==NULL) {
printk(FSNAME ": kmalloc failed in cdfs_get_iso_info\n");
return NULL;
}
block = this_cd->track[track_no].start_lba+16; /* ISO info at sector 16 */
PRINT("Retrieving info for data track %d: block %d\n",
track_no, block);
if (!(bh = cdfs_bread(sb, block, CD_FRAMESIZE))) {
PRINT("FAILED\n");
return NULL;
}
if (!strncmp(bh->b_data+1,"CD001",5)) {
memcpy(iso_info, bh->b_data,
sizeof(struct iso_primary_descriptor)); /* ISO session */
} else {
kfree(iso_info);
iso_info=NULL; /* DATA, but no ISO */
}
brelse(bh);
return iso_info;
}
void cdfs_check_bootable(struct super_block *sb){
struct buffer_head * bh1, * bh2, *bh3;
cd * this_cd = cdfs_info(sb);
int boottrack=0;
int no_bootimage=0;
int sectionoffset=0;
if (!(bh1 = cdfs_bread(sb, 17, CD_FRAMESIZE)))
return; /* sector 17 is unreadable */
else
if (!strncmp(bh1->b_data+7, "EL TORITO", 9)) {
PRINT("BOOT, catalog at %d\n", *(unsigned int*)(bh1->b_data+71));
bh2 = cdfs_bread(sb, *(unsigned int*)(bh1->b_data+71), CD_FRAMESIZE);
PRINT("Catalog:\n\tHeader ID=%d, Platform ID=%d, Developer ID=%s\n",
*(unsigned char*)(bh2->b_data),
*(unsigned char*)(bh2->b_data+1), bh2->b_data+4);
do {
this_cd->tracks++;
boottrack = this_cd->tracks+2;
PRINT("\tInitial/Default entry: %x Bootable, media: %d\n",
*(unsigned char*)(bh2->b_data+32+0+sectionoffset),
*(unsigned char*)(bh2->b_data+32+1+sectionoffset) & 15);
PRINT("\tSector count: %d, Load LBA: %d\n",
*(unsigned short*)(bh2->b_data+32+6+sectionoffset),
*(unsigned int*)(bh2->b_data+32+8+sectionoffset));
this_cd->track[boottrack].type = BOOT;
this_cd->track[boottrack].start_lba = *(unsigned int*)
(bh2->b_data+32+8+sectionoffset);
this_cd->track[boottrack].size = cdfs_bootmedia[
*(unsigned char*)(bh2->b_data+32+1+sectionoffset) & 15].size;
if (!this_cd->track[boottrack].size)
this_cd->track[boottrack].size = *(unsigned short*)
(bh2->b_data+32+6+sectionoffset) * CD_FRAMESIZE ;
this_cd->track[boottrack].stop_lba = this_cd->track[boottrack].
start_lba + this_cd->track[boottrack].size/CD_FRAMESIZE -1;
this_cd->track[boottrack].time = 0;
sprintf(this_cd->track[boottrack].name,"boot.image_%d",no_bootimage);
strncpy(this_cd->track[boottrack].bootID,
bh2->b_data+4+sectionoffset,24); /* 27?? */
this_cd->track[boottrack].bootID[24]=0;
/* get first sector from boot image */
bh3=cdfs_bread(sb, this_cd->track[boottrack].start_lba, CD_FRAMESIZE);
if ((*(unsigned char*)(bh3->b_data+511)==0xAA) &&
(*(unsigned char*)(bh3->b_data+512)==0x55)) {
strcat(this_cd->track[boottrack].bootID,
"\n\tType: x86 boot sector, ");
if (!strncmp(bh3->b_data+2, "LILO", 4))
strcat(this_cd->track[boottrack].bootID,
"LILO boot/chain loader with ");
else if (!strncmp(bh3->b_data+495, "LDLINUX", 7)) {
strncat(this_cd->track[boottrack].bootID, bh3->b_data+495, 12);
strcat(this_cd->track[boottrack].bootID, " boot loader with ");
}
if (*(unsigned short*)(bh3->b_data+0x438)==0xEF53)
strcat(this_cd->track[boottrack].bootID,
"Linux/i386 ext2 filesystem\n");
else /* FAT */
strncat(this_cd->track[boottrack].bootID,
bh3->b_data+54, 8); /* FAT type */
}
brelse(bh3);
if (sectionoffset==0) sectionoffset=0x60;
sectionoffset=sectionoffset+0x20;
} while (*(unsigned char*)(bh2->b_data+0x42)>no_bootimage++);
brelse(bh2);
}
brelse(bh1);
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,24)
cdfs_iget(sb,boottrack);
#endif
}
