int saveenv(void)
{
env_t env_new;
ssize_t len;
char *res;
block_dev_desc_t *dev_desc = NULL;
int dev = EXT4_ENV_DEVICE;
int part = EXT4_ENV_PART;
int err;
res = (char *)&env_new.data;
len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
return 1;
}
dev_desc = get_dev(EXT4_ENV_INTERFACE, dev);
if (dev_desc == NULL) {
printf("Failed to find %s%d\n",
EXT4_ENV_INTERFACE, dev);
return 1;
}
err = ext4_register_device(dev_desc, part);
if (err) {
printf("Failed to register %s%d:%d\n",
EXT4_ENV_INTERFACE, dev, part);
return 1;
}
env_new.crc = crc32(0, env_new.data, ENV_SIZE);
err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t));
ext4fs_close();
if (err == -1) {
printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
return 1;
}
puts("done\n");
return 0;
}
void env_relocate_spec(void)
{
char buf[CONFIG_ENV_SIZE];
block_dev_desc_t *dev_desc = NULL;
int dev = EXT4_ENV_DEVICE;
int part = EXT4_ENV_PART;
int err;
dev_desc = get_dev(EXT4_ENV_INTERFACE, dev);
if (dev_desc == NULL) {
printf("Failed to find %s%d\n",
EXT4_ENV_INTERFACE, dev);
set_default_env(NULL);
return;
}
err = ext4_register_device(dev_desc, part);
if (err) {
printf("Failed to register %s%d:%d\n",
EXT4_ENV_INTERFACE, dev, part);
set_default_env(NULL);
return;
}
err = ext4_read_file(EXT4_ENV_FILE, (uchar *)&buf, 0, CONFIG_ENV_SIZE);
ext4fs_close();
if (err == -1) {
printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
set_default_env(NULL);
return;
}
env_import(buf, 1);
}
int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[])
{
const char *filename = "/";
int part_length;
unsigned long part = 1;
int dev;
char *ep;
unsigned long ram_address;
unsigned long file_size;
disk_partition_t info;
struct ext_filesystem *fs;
if (argc < 6)
return cmd_usage(cmdtp);
dev = (int)simple_strtoul(argv[2], &ep, 16);
ext4_dev_desc = get_dev(argv[1], dev);
if (ext4_dev_desc == NULL) {
printf("Block device %s %d not supported\n", argv[1], dev);
return 1;
}
if (init_fs(ext4_dev_desc))
return 1;
fs = get_fs();
if (*ep) {
if (*ep != ':') {
puts("Invalid boot device, use `dev[:part]'\n");
goto fail;
}
part = simple_strtoul(++ep, NULL, 16);
}
/* get the filename */
filename = argv[3];
/* get the address in hexadecimal format (string to int) */
ram_address = simple_strtoul(argv[4], NULL, 16);
/* get the filesize in base 10 format */
file_size = simple_strtoul(argv[5], NULL, 10);
/* set the device as block device */
part_length = ext4fs_set_blk_dev(fs->dev_desc, part);
if (part_length == 0) {
printf("Bad partition - %s %d:%lu\n", argv[1], dev, part);
goto fail;
}
/* register the device and partition */
if (ext4_register_device(fs->dev_desc, part) != 0) {
printf("Unable to use %s %d:%lu for fattable\n",
argv[1], dev, part);
goto fail;
}
/* get the partition information */
if (!get_partition_info(fs->dev_desc, part, &info)) {
total_sector = (info.size * info.blksz) / SECTOR_SIZE;
fs->total_sect = total_sector;
} else {
printf("error : get partition info\n");
goto fail;
}
/* mount the filesystem */
if (!ext4fs_mount(part_length)) {
printf("Bad ext4 partition %s %d:%lu\n", argv[1], dev, part);
goto fail;
}
/* start write */
if (ext4fs_write(filename, (unsigned char *)ram_address, file_size)) {
printf("** Error ext4fs_write() **\n");
goto fail;
}
ext4fs_close();
deinit_fs(fs->dev_desc);
return 0;
fail:
ext4fs_close();
deinit_fs(fs->dev_desc);
return 1;
}
