bool test_lwext4_mount(struct ext4_blockdev *bdev, struct ext4_bcache *bcache)
{
int r;
bc = bcache;
bd = bdev;
if (!bd) {
printf("test_lwext4_mount: no block device\n");
return false;
}
ext4_dmask_set(DEBUG_ALL);
r = ext4_device_register(bd, bc ? bc : 0, "ext4_fs");
if (r != EOK) {
printf("ext4_device_register: rc = %d\n", r);
return false;
}
r = ext4_mount("ext4_fs", "/mp/", false);
if (r != EOK) {
printf("ext4_mount: rc = %d\n", r);
return false;
}
r = ext4_recover("/mp/");
if (r != EOK && r != ENOTSUP) {
printf("ext4_recover: rc = %d\n", r);
return false;
}
r = ext4_journal_start("/mp/");
if (r != EOK) {
printf("ext4_journal_start: rc = %d\n", r);
return false;
}
ext4_cache_write_back("/mp/", 1);
return true;
}
static int grub_load_from_mmc(void) {
ext4_file f;
uint32_t bytes_read;
int ret = 0, allow = 0;
dprintf(INFO, "%s: part=[%s] path=[%s]\n", __func__, GRUB_BOOT_PARTITION, GRUB_PATH);
// create ext4 device
struct ext4_blockdev* mmcdev = ext4_mmcdev_get(GRUB_BOOT_PARTITION);
if(!mmcdev){
dprintf(CRITICAL, "MMC device ERROR\n");
return -1;
}
// register it
ret = ext4_device_register(mmcdev, 0, GRUB_BOOT_PARTITION);
if(ret != EOK){
dprintf(CRITICAL, "ext4_device_register ERROR = %d\n", ret);
return ret;
}
// mount it
ret = ext4_mount(GRUB_BOOT_PARTITION, GRUB_MOUNTPOINT);
if(ret != EOK){
dprintf(CRITICAL, "ext4_mount ERROR = %d\n", ret);
return -1;
}
// check permissions of crucial files
if(grub_mmc_check_permissions(GRUB_MOUNTPOINT GRUB_PATH "/core.img", &allow)==EOK && !allow)
return -1;
if(grub_mmc_check_permissions(GRUB_MOUNTPOINT GRUB_PATH "/grub.cfg", &allow)==EOK && !allow)
return -1;
if(grub_mmc_check_permissions(GRUB_MOUNTPOINT GRUB_PATH "/grubenv", &allow)==EOK && !allow)
return -1;
dprintf(INFO, "Permissions are good\n");
// open file
ret = ext4_fopen(&f, GRUB_MOUNTPOINT GRUB_PATH "/core.img", "rb");
if(ret != EOK){
dprintf(CRITICAL, "ext4_fopen ERROR = %d\n", ret);
return -1;
}
// read file
ret = ext4_fread(&f, (void*)GRUB_LOADING_ADDRESS_VIRT, ext4_fsize(&f), &bytes_read);
if(ret != EOK){
dprintf(CRITICAL, "ext4_fread ERROR = %d\n", ret);
return -1;
}
// close file
ret = ext4_fclose(&f);
if(ret != EOK){
dprintf(CRITICAL, "ext4_fclose ERROR = %d\n", ret);
return -1;
}
// unmount partition
ret = ext4_umount(GRUB_MOUNTPOINT);
if(ret != EOK){
dprintf(CRITICAL, "ext4_umount ERROR = %d\n", ret);
return -1;
}
// store bootdev
unsigned int index = (unsigned int) partition_get_index(GRUB_BOOT_PARTITION);
char buf[20];
sprintf(buf, "hd0,%u", index+1);
grub_bootdev = strdup(buf);
grub_bootpath = strdup(GRUB_BOOT_PATH_PREFIX "boot/grub");
dprintf(INFO, "Loaded GRUB from MMC\n");
return 0;
}
