int make_ext4fs_sparse_fd(int fd, long long len,
const char *mountpoint, struct selabel_handle *sehnd)
{
reset_ext4fs_info();
info.len = len;
return make_ext4fs_internal(fd, NULL, mountpoint, NULL, 0, 1, 0, 0, sehnd, 0);
}
int make_ext4fs(const char *filename, s64 len,
const char *mountpoint, struct selabel_handle *sehnd)
{
int fd;
int status;
reset_ext4fs_info();
info.len = len;
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
if (fd < 0) {
error_errno("open");
return EXIT_FAILURE;
}
#ifdef NO_LAZYINIT
status = make_ext4fs_internal(fd, NULL, mountpoint, NULL, 0, 0, 0, 1, 1, sehnd);
#else
status = make_ext4fs_internal(fd, NULL, mountpoint, NULL, 0, 0, 0, 1, 0, sehnd);
#endif
close(fd);
return status;
}
static int format_ext4(char *fs_blkdev, char *fs_mnt_point, bool crypt_footer)
{
uint64_t dev_sz;
int fd, rc = 0;
if ((fd = open(fs_blkdev, O_WRONLY)) < 0) {
PERROR << "Cannot open block device";
return -1;
}
if ((ioctl(fd, BLKGETSIZE64, &dev_sz)) == -1) {
PERROR << "Cannot get block device size";
close(fd);
return -1;
}
struct selabel_handle *sehandle = selinux_android_file_context_handle();
if (!sehandle) {
/* libselinux logs specific error */
LERROR << "Cannot initialize android file_contexts";
close(fd);
return -1;
}
/* Format the partition using the calculated length */
reset_ext4fs_info();
info.len = (off64_t)dev_sz;
if (crypt_footer) {
info.len -= CRYPT_FOOTER_OFFSET;
}
/* Use make_ext4fs_internal to avoid wiping an already-wiped partition. */
rc = make_ext4fs_internal(fd, NULL, NULL, fs_mnt_point, 0, 0, 0, 0, 0, 0, sehandle, 0, 0, NULL, NULL, NULL);
if (rc) {
LERROR << "make_ext4fs returned " << rc;
}
close(fd);
if (sehandle) {
selabel_close(sehandle);
}
return rc;
}
int main(int argc, char **argv)
{
int opt;
const char *filename = NULL;
const char *directory = NULL;
char *mountpoint = NULL;
fs_config_func_t fs_config_func = NULL;
int gzip = 0;
int sparse = 0;
int crc = 0;
int wipe = 0;
int fd;
int exitcode;
int verbose = 0;
struct selabel_handle *sehnd = NULL;
#ifndef USE_MINGW
struct selinux_opt seopts[] = { { SELABEL_OPT_PATH, "" } };
#endif
while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:a:S:fwzJsctv")) != -1) {
switch (opt) {
case 'l':
info.len = parse_num(optarg);
break;
case 'j':
info.journal_blocks = parse_num(optarg);
break;
case 'b':
info.block_size = parse_num(optarg);
break;
case 'g':
info.blocks_per_group = parse_num(optarg);
break;
case 'i':
info.inodes = parse_num(optarg);
break;
case 'I':
info.inode_size = parse_num(optarg);
break;
case 'L':
info.label = optarg;
break;
case 'f':
force = 1;
break;
case 'a':
#ifdef ANDROID
fs_config_func = fs_config;
mountpoint = optarg;
#else
fprintf(stderr, "can't set android permissions - built without android support\n");
usage(argv[0]);
exit(EXIT_FAILURE);
#endif
break;
case 'w':
wipe = 1;
break;
case 'z':
gzip = 1;
break;
case 'J':
info.no_journal = 1;
break;
case 'c':
crc = 1;
break;
case 's':
sparse = 1;
break;
case 't':
fprintf(stderr, "Warning: -t (initialize inode tables) is deprecated\n");
break;
case 'S':
#ifndef USE_MINGW
seopts[0].value = optarg;
sehnd = selabel_open(SELABEL_CTX_FILE, seopts, 1);
if (!sehnd) {
perror(optarg);
exit(EXIT_FAILURE);
}
#endif
break;
case 'v':
verbose = 1;
break;
default: /* '?' */
usage(argv[0]);
exit(EXIT_FAILURE);
}
}
#if !defined(HOST)
// Use only if -S option not requested
if (!sehnd && mountpoint) {
sehnd = selinux_android_file_context_handle();
if (!sehnd) {
perror(optarg);
exit(EXIT_FAILURE);
}
}
#endif
if (wipe && sparse) {
fprintf(stderr, "Cannot specifiy both wipe and sparse\n");
usage(argv[0]);
exit(EXIT_FAILURE);
}
if (wipe && gzip) {
fprintf(stderr, "Cannot specifiy both wipe and gzip\n");
usage(argv[0]);
exit(EXIT_FAILURE);
}
if (optind >= argc) {
fprintf(stderr, "Expected filename after options\n");
usage(argv[0]);
exit(EXIT_FAILURE);
}
filename = argv[optind++];
if (optind < argc)
directory = argv[optind++];
if (optind < argc) {
fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
usage(argv[0]);
exit(EXIT_FAILURE);
}
if (strcmp(filename, "-")) {
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
if (fd < 0) {
perror("open");
return EXIT_FAILURE;
}
} else {
fd = STDOUT_FILENO;
}
exitcode = make_ext4fs_internal(fd, directory, mountpoint, fs_config_func, gzip,
sparse, crc, wipe, sehnd, verbose);
close(fd);
if (exitcode && strcmp(filename, "-"))
unlink(filename);
return exitcode;
}
