int erase_persistent_partition() {
Volume *v = volume_for_path(PERSISTENT_PATH);
if (v == NULL) {
// most devices won't have /persistent, so this is not an error.
return 0;
}
int fd = open(v->blk_device, O_RDWR);
uint64_t size = get_file_size(fd);
if (size == 0) {
LOGE("failed to stat size of /persistent\n");
close(fd);
return -1;
}
char oem_unlock_enabled;
lseek(fd, size - 1, SEEK_SET);
read(fd, &oem_unlock_enabled, 1);
if (oem_unlock_enabled) {
if (wipe_block_device(fd, size)) {
LOGE("error wiping /persistent: %s\n", strerror(errno));
close(fd);
return -1;
}
lseek(fd, size - 1, SEEK_SET);
write(fd, &oem_unlock_enabled, 1);
}
close(fd);
return (int) oem_unlock_enabled;
}
int flash_erase(int fd)
{
int64_t size;
size = get_block_device_size(fd);
D(DEBUG, "erase %"PRId64" data from %d\n", size, fd);
return wipe_block_device(fd, size);
}
int main(int argc, char *argv[])
{
int secure = 0;
char *devname;
int fd;
u64 len;
struct stat statbuf;
int ret;
if ((argc != 2) && (argc != 3)) {
usage();
}
if (argc == 3) {
if (!strcmp(argv[1], "-s")) {
secure = 1;
devname = argv[2];
} else {
usage();
}
} else {
devname = argv[1];
}
fd = open(devname, O_RDWR);
if (fd < 0) {
fprintf(stderr, "Cannot open device %s\n", devname);
exit(1);
}
if (fstat(fd, &statbuf) < 0) {
fprintf(stderr, "Cannot stat %s\n", devname);
exit(1);
}
if (!S_ISBLK(statbuf.st_mode)) {
fprintf(stderr, "%s is not a block device\n", devname);
exit(1);
}
len = get_block_device_size(fd);
if (! len) {
fprintf(stderr, "Cannot get size of block device %s\n", devname);
exit(1);
}
ret = wipe_block_device(fd, len, secure);
close(fd);
return ret;
}
static int com_android_server_PersistentDataBlockService_wipe(JNIEnv *env, jclass, jstring jpath) {
ScopedUtfChars path(env, jpath);
int fd = open(path.c_str(), O_WRONLY);
if (fd < 0)
return 0;
const int ret = wipe_block_device(fd);
close(fd);
return ret;
}
int erase_usercalibration_partition() {
Volume *v = volume_for_path(USERCALIB_PATH);
if (v == NULL) {
// most devices won't have /mnt/usercalib, so this is not an error.
return 0;
}
int fd = open(v->blk_device, O_RDWR);
uint64_t size = get_file_size(fd);
if (size != 0) {
if (wipe_block_device(fd, size)) {
LOGE("error wiping /mnt/usercalib: %s\n", strerror(errno));
close(fd);
return -1;
}
}
close(fd);
return 0;
}
int make_ext4fs_internal(int fd, const char *directory,
char *mountpoint, fs_config_func_t fs_config_func, int gzip, int sparse,
int crc, int wipe, int init_itabs, struct selabel_handle *sehnd)
{
u32 root_inode_num;
u16 root_mode;
if (setjmp(setjmp_env))
return EXIT_FAILURE; /* Handle a call to longjmp() */
if (info.len <= 0)
info.len = get_file_size(fd);
if (info.len <= 0) {
fprintf(stderr, "Need size of filesystem\n");
return EXIT_FAILURE;
}
if (info.block_size <= 0)
info.block_size = compute_block_size();
/* Round down the filesystem length to be a multiple of the block size */
info.len &= ~((u64)info.block_size - 1);
if (info.journal_blocks == 0)
info.journal_blocks = compute_journal_blocks();
if (info.no_journal == 0)
info.feat_compat = EXT4_FEATURE_COMPAT_HAS_JOURNAL;
else
info.journal_blocks = 0;
if (info.blocks_per_group <= 0)
info.blocks_per_group = compute_blocks_per_group();
if (info.inodes <= 0)
info.inodes = compute_inodes();
if (info.inode_size <= 0)
info.inode_size = 256;
if (info.label == NULL)
info.label = "";
info.inodes_per_group = compute_inodes_per_group();
info.feat_compat |=
EXT4_FEATURE_COMPAT_RESIZE_INODE;
info.feat_ro_compat |=
EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER |
EXT4_FEATURE_RO_COMPAT_LARGE_FILE;
info.feat_incompat |=
EXT4_FEATURE_INCOMPAT_EXTENTS |
EXT4_FEATURE_INCOMPAT_FILETYPE;
info.bg_desc_reserve_blocks = compute_bg_desc_reserve_blocks();
printf("Creating filesystem with parameters:\n");
printf(" Size: %llu\n", info.len);
printf(" Block size: %d\n", info.block_size);
printf(" Blocks per group: %d\n", info.blocks_per_group);
printf(" Inodes per group: %d\n", info.inodes_per_group);
printf(" Inode size: %d\n", info.inode_size);
printf(" Journal blocks: %d\n", info.journal_blocks);
printf(" Label: %s\n", info.label);
ext4_create_fs_aux_info();
printf(" Blocks: %llu\n", aux_info.len_blocks);
printf(" Block groups: %d\n", aux_info.groups);
printf(" Reserved block group size: %d\n", info.bg_desc_reserve_blocks);
info.sparse_file = sparse_file_new(info.block_size, info.len);
block_allocator_init();
ext4_fill_in_sb();
MTK_add_mountpoint(aux_info.sb,mountpoint);
if (reserve_inodes(0, 10) == EXT4_ALLOCATE_FAILED)
error("failed to reserve first 10 inodes");
if (info.feat_compat & EXT4_FEATURE_COMPAT_HAS_JOURNAL)
ext4_create_journal_inode();
if (info.feat_compat & EXT4_FEATURE_COMPAT_RESIZE_INODE)
ext4_create_resize_inode();
#ifdef USE_MINGW
// Windows needs only 'create an empty fs image' functionality
assert(!directory);
root_inode_num = build_default_directory_structure();
#else
if (directory)
root_inode_num = build_directory_structure(directory, mountpoint, 0,
fs_config_func, sehnd);
else
root_inode_num = build_default_directory_structure();
#endif
root_mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
inode_set_permissions(root_inode_num, root_mode, 0, 0, 0);
#ifdef HAVE_SELINUX
if (sehnd) {
char *sepath = NULL;
char *secontext = NULL;
if (mountpoint[0] == '/')
sepath = strdup(mountpoint);
else
asprintf(&sepath, "/%s", mountpoint);
if (!sepath)
critical_error_errno("malloc");
if (selabel_lookup(sehnd, &secontext, sepath, S_IFDIR) < 0) {
error("cannot lookup security context for %s", sepath);
}
if (secontext) {
printf("Labeling %s as %s\n", sepath, secontext);
inode_set_selinux(root_inode_num, secontext);
}
free(sepath);
freecon(secontext);
}
#endif
ext4_update_free();
if (init_itabs)
init_unused_inode_tables();
ext4_queue_sb();
printf("Created filesystem with %d/%d inodes and %d/%d blocks\n",
aux_info.sb->s_inodes_count - aux_info.sb->s_free_inodes_count,
aux_info.sb->s_inodes_count,
aux_info.sb->s_blocks_count_lo - aux_info.sb->s_free_blocks_count_lo,
aux_info.sb->s_blocks_count_lo);
if (wipe)
wipe_block_device(fd, info.len);
write_ext4_image(fd, gzip, sparse, crc);
sparse_file_destroy(info.sparse_file);
info.sparse_file = NULL;
return 0;
}
int make_ext4fs_internal(int fd, const char *_directory,
fs_config_func_t fs_config_func, int gzip,
int sparse, int crc, int wipe,
int verbose, time_t fixed_time,
FILE* block_list_file)
{
u32 root_inode_num;
u16 root_mode;
char *directory = NULL;
if (setjmp(setjmp_env))
return EXIT_FAILURE; /* Handle a call to longjmp() */
if (_directory == NULL) {
fprintf(stderr, "Need a source directory\n");
return EXIT_FAILURE;
}
directory = canonicalize_rel_slashes(_directory);
if (info.len <= 0)
info.len = get_file_size(fd);
if (info.len <= 0) {
fprintf(stderr, "Need size of filesystem\n");
return EXIT_FAILURE;
}
if (info.block_size <= 0)
info.block_size = compute_block_size();
/* Round down the filesystem length to be a multiple of the block size */
info.len &= ~((u64)info.block_size - 1);
if (info.journal_blocks == 0)
info.journal_blocks = compute_journal_blocks();
if (info.no_journal == 0)
info.feat_compat = EXT4_FEATURE_COMPAT_HAS_JOURNAL;
else
info.journal_blocks = 0;
if (info.blocks_per_group <= 0)
info.blocks_per_group = compute_blocks_per_group();
if (info.inodes <= 0)
info.inodes = compute_inodes();
if (info.inode_size <= 0)
info.inode_size = 256;
if (info.label == NULL)
info.label = "";
info.inodes_per_group = compute_inodes_per_group();
info.feat_compat |=
EXT4_FEATURE_COMPAT_RESIZE_INODE |
EXT4_FEATURE_COMPAT_EXT_ATTR;
info.feat_ro_compat |=
EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER |
EXT4_FEATURE_RO_COMPAT_LARGE_FILE |
EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
info.feat_incompat |=
EXT4_FEATURE_INCOMPAT_EXTENTS |
EXT4_FEATURE_INCOMPAT_FILETYPE;
info.bg_desc_reserve_blocks = compute_bg_desc_reserve_blocks();
printf("Creating filesystem with parameters:\n");
printf(" Size: %"PRIu64"\n", info.len);
printf(" Block size: %d\n", info.block_size);
printf(" Blocks per group: %d\n", info.blocks_per_group);
printf(" Inodes per group: %d\n", info.inodes_per_group);
printf(" Inode size: %d\n", info.inode_size);
printf(" Journal blocks: %d\n", info.journal_blocks);
printf(" Label: %s\n", info.label);
ext4_create_fs_aux_info();
printf(" Blocks: %"PRIu64"\n", aux_info.len_blocks);
printf(" Block groups: %d\n", aux_info.groups);
printf(" Reserved blocks: %"PRIu64"\n", (aux_info.len_blocks / 100) * info.reserve_pcnt);
printf(" Reserved block group size: %d\n", info.bg_desc_reserve_blocks);
ext4_sparse_file = sparse_file_new(info.block_size, info.len);
block_allocator_init();
ext4_fill_in_sb();
if (reserve_inodes(0, 10) == EXT4_ALLOCATE_FAILED)
error("failed to reserve first 10 inodes");
if (info.feat_compat & EXT4_FEATURE_COMPAT_HAS_JOURNAL)
ext4_create_journal_inode();
if (info.feat_compat & EXT4_FEATURE_COMPAT_RESIZE_INODE)
ext4_create_resize_inode();
root_inode_num = build_directory_structure(directory, "", 0,
fs_config_func, verbose, fixed_time);
root_mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
inode_set_permissions(root_inode_num, root_mode, 0, 0, 0);
ext4_update_free();
ext4_queue_sb();
if (block_list_file) {
size_t dirlen = strlen(directory);
struct block_allocation* p = get_saved_allocation_chain();
while (p) {
if (strncmp(p->filename, directory, dirlen) == 0) {
fprintf(block_list_file, "%s", p->filename + dirlen);
} else {
fprintf(block_list_file, "%s", p->filename);
}
print_blocks(block_list_file, p);
struct block_allocation* pn = p->next;
free_alloc(p);
p = pn;
}
}
printf("Created filesystem with %d/%d inodes and %d/%d blocks\n",
aux_info.sb->s_inodes_count - aux_info.sb->s_free_inodes_count,
aux_info.sb->s_inodes_count,
aux_info.sb->s_blocks_count_lo - aux_info.sb->s_free_blocks_count_lo,
aux_info.sb->s_blocks_count_lo);
if (wipe && WIPE_IS_SUPPORTED) {
wipe_block_device(fd, info.len);
}
write_ext4_image(fd, gzip, sparse, crc);
sparse_file_destroy(ext4_sparse_file);
ext4_sparse_file = NULL;
free(directory);
return 0;
}
/* When multiple fstab records share the same mount_point, it will
* try to mount each one in turn, and ignore any duplicates after a
* first successful mount.
* Returns -1 on error, and FS_MGR_MNTALL_* otherwise.
*/
int fs_mgr_mount_all(struct fstab *fstab, int mount_mode)
{
int i = 0;
int encryptable = FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE;
int error_count = 0;
int mret = -1;
int mount_errno = 0;
int attempted_idx = -1;
if (!fstab) {
return -1;
}
for (i = 0; i < fstab->num_entries; i++) {
/* Don't mount entries that are managed by vold or not for the mount mode*/
if ((fstab->recs[i].fs_mgr_flags & (MF_VOLDMANAGED | MF_RECOVERYONLY)) ||
((mount_mode == MOUNT_MODE_LATE) && !fs_mgr_is_latemount(&fstab->recs[i])) ||
((mount_mode == MOUNT_MODE_EARLY) && fs_mgr_is_latemount(&fstab->recs[i]))) {
continue;
}
/* Skip swap and raw partition entries such as boot, recovery, etc */
if (!strcmp(fstab->recs[i].fs_type, "swap") ||
!strcmp(fstab->recs[i].fs_type, "emmc") ||
!strcmp(fstab->recs[i].fs_type, "mtd")) {
continue;
}
/* Skip mounting the root partition, as it will already have been mounted */
if (!strcmp(fstab->recs[i].mount_point, "/")) {
if ((fstab->recs[i].fs_mgr_flags & MS_RDONLY) != 0) {
fs_mgr_set_blk_ro(fstab->recs[i].blk_device);
}
continue;
}
/* Translate LABEL= file system labels into block devices */
if (!strcmp(fstab->recs[i].fs_type, "ext2") ||
!strcmp(fstab->recs[i].fs_type, "ext3") ||
!strcmp(fstab->recs[i].fs_type, "ext4")) {
int tret = translate_ext_labels(&fstab->recs[i]);
if (tret < 0) {
ERROR("Could not translate label to block device\n");
continue;
}
}
if (fstab->recs[i].fs_mgr_flags & MF_WAIT) {
wait_for_file(fstab->recs[i].blk_device, WAIT_TIMEOUT);
}
if ((fstab->recs[i].fs_mgr_flags & MF_VERIFY) && device_is_secure()) {
int rc = fs_mgr_setup_verity(&fstab->recs[i]);
if (__android_log_is_debuggable() && rc == FS_MGR_SETUP_VERITY_DISABLED) {
INFO("Verity disabled");
} else if (rc != FS_MGR_SETUP_VERITY_SUCCESS) {
ERROR("Could not set up verified partition, skipping!\n");
continue;
}
}
int last_idx_inspected;
int top_idx = i;
mret = mount_with_alternatives(fstab, i, &last_idx_inspected, &attempted_idx);
i = last_idx_inspected;
mount_errno = errno;
/* Deal with encryptability. */
if (!mret) {
int status = handle_encryptable(&fstab->recs[attempted_idx]);
if (status == FS_MGR_MNTALL_FAIL) {
/* Fatal error - no point continuing */
return status;
}
if (status != FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE) {
if (encryptable != FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE) {
// Log and continue
ERROR("Only one encryptable/encrypted partition supported\n");
}
encryptable = status;
}
/* Success! Go get the next one */
continue;
}
/* mount(2) returned an error, handle the encryptable/formattable case */
bool wiped = partition_wiped(fstab->recs[top_idx].blk_device);
bool crypt_footer = false;
if (mret && mount_errno != EBUSY && mount_errno != EACCES &&
fs_mgr_is_formattable(&fstab->recs[top_idx]) && wiped) {
/* top_idx and attempted_idx point at the same partition, but sometimes
* at two different lines in the fstab. Use the top one for formatting
* as that is the preferred one.
*/
ERROR("%s(): %s is wiped and %s %s is formattable. Format it.\n", __func__,
fstab->recs[top_idx].blk_device, fstab->recs[top_idx].mount_point,
fstab->recs[top_idx].fs_type);
if (fs_mgr_is_encryptable(&fstab->recs[top_idx]) &&
strcmp(fstab->recs[top_idx].key_loc, KEY_IN_FOOTER)) {
int fd = open(fstab->recs[top_idx].key_loc, O_WRONLY);
if (fd >= 0) {
INFO("%s(): also wipe %s\n", __func__, fstab->recs[top_idx].key_loc);
wipe_block_device(fd, get_file_size(fd));
close(fd);
} else {
ERROR("%s(): %s wouldn't open (%s)\n", __func__,
fstab->recs[top_idx].key_loc, strerror(errno));
}
} else if (fs_mgr_is_encryptable(&fstab->recs[top_idx]) &&
!strcmp(fstab->recs[top_idx].key_loc, KEY_IN_FOOTER)) {
crypt_footer = true;
}
if (fs_mgr_do_format(&fstab->recs[top_idx], crypt_footer) == 0) {
/* Let's replay the mount actions. */
i = top_idx - 1;
continue;
} else {
ERROR("%s(): Format failed. Suggest recovery...\n", __func__);
encryptable = FS_MGR_MNTALL_DEV_NEEDS_RECOVERY;
continue;
}
}
if (mret && mount_errno != EBUSY && mount_errno != EACCES &&
fs_mgr_is_encryptable(&fstab->recs[attempted_idx])) {
if (wiped) {
ERROR("%s(): %s is wiped and %s %s is encryptable. Suggest recovery...\n", __func__,
fstab->recs[attempted_idx].blk_device, fstab->recs[attempted_idx].mount_point,
fstab->recs[attempted_idx].fs_type);
encryptable = FS_MGR_MNTALL_DEV_NEEDS_RECOVERY;
continue;
} else {
/* Need to mount a tmpfs at this mountpoint for now, and set
* properties that vold will query later for decrypting
*/
ERROR("%s(): possibly an encryptable blkdev %s for mount %s type %s )\n", __func__,
fstab->recs[attempted_idx].blk_device, fstab->recs[attempted_idx].mount_point,
fstab->recs[attempted_idx].fs_type);
if (fs_mgr_do_tmpfs_mount(fstab->recs[attempted_idx].mount_point) < 0) {
++error_count;
continue;
}
}
encryptable = FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED;
} else {
if (fs_mgr_is_nofail(&fstab->recs[attempted_idx])) {
ERROR("Ignoring failure to mount an un-encryptable or wiped partition on"
"%s at %s options: %s error: %s\n",
fstab->recs[attempted_idx].blk_device, fstab->recs[attempted_idx].mount_point,
fstab->recs[attempted_idx].fs_options, strerror(mount_errno));
} else {
ERROR("Failed to mount an un-encryptable or wiped partition on"
"%s at %s options: %s error: %s\n",
fstab->recs[attempted_idx].blk_device, fstab->recs[attempted_idx].mount_point,
fstab->recs[attempted_idx].fs_options, strerror(mount_errno));
++error_count;
}
continue;
}
}
if (error_count) {
return -1;
} else {
return encryptable;
}
}
int format_volume(const char* volume) {
Volume* v = volume_for_path(volume);
if (v == NULL) {
LOGE("unknown volume \"%s\"\n", volume);
return -1;
}
if (strcmp(v->fs_type, "ramdisk") == 0) {
// you can't format the ramdisk.
LOGE("can't format_volume \"%s\"", volume);
return -1;
}
if (strcmp(v->mount_point, volume) != 0) {
LOGE("can't give path \"%s\" to format_volume\n", volume);
return -1;
}
if (ensure_path_unmounted(volume) != 0) {
LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point);
return -1;
}
if (strcmp(v->fs_type, "yaffs2") == 0 || strcmp(v->fs_type, "mtd") == 0) {
mtd_scan_partitions();
const MtdPartition* partition = mtd_find_partition_by_name(v->blk_device);
if (partition == NULL) {
LOGE("format_volume: no MTD partition \"%s\"\n", v->blk_device);
return -1;
}
MtdWriteContext *write = mtd_write_partition(partition);
if (write == NULL) {
LOGW("format_volume: can't open MTD \"%s\"\n", v->blk_device);
return -1;
} else if (mtd_erase_blocks(write, -1) == (off_t) -1) {
LOGW("format_volume: can't erase MTD \"%s\"\n", v->blk_device);
mtd_write_close(write);
return -1;
} else if (mtd_write_close(write)) {
LOGW("format_volume: can't close MTD \"%s\"\n", v->blk_device);
return -1;
}
return 0;
}
if (strcmp(v->fs_type, "ext4") == 0 || strcmp(v->fs_type, "f2fs") == 0) {
// if there's a key_loc that looks like a path, it should be a
// block device for storing encryption metadata. wipe it too.
if (v->key_loc != NULL && v->key_loc[0] == '/') {
LOGI("wiping %s\n", v->key_loc);
int fd = open(v->key_loc, O_WRONLY | O_CREAT, 0644);
if (fd < 0) {
LOGE("format_volume: failed to open %s\n", v->key_loc);
return -1;
}
wipe_block_device(fd, get_file_size(fd));
close(fd);
}
ssize_t length = 0;
if (v->length != 0) {
length = v->length;
} else if (v->key_loc != NULL && strcmp(v->key_loc, "footer") == 0) {
length = -CRYPT_FOOTER_OFFSET;
}
int result;
if (strcmp(v->fs_type, "ext4") == 0) {
result = make_ext4fs(v->blk_device, length, volume, sehandle);
} else { /* Has to be f2fs because we checked earlier. */
if (v->key_loc != NULL && strcmp(v->key_loc, "footer") == 0 && length < 0) {
LOGE("format_volume: crypt footer + negative length (%zd) not supported on %s\n", length, v->fs_type);
return -1;
}
if (length < 0) {
LOGE("format_volume: negative length (%zd) not supported on %s\n", length, v->fs_type);
return -1;
}
char *num_sectors;
if (asprintf(&num_sectors, "%zd", length / 512) <= 0) {
LOGE("format_volume: failed to create %s command for %s\n", v->fs_type, v->blk_device);
return -1;
}
const char *f2fs_path = "/sbin/mkfs.f2fs";
const char* const f2fs_argv[] = {"mkfs.f2fs", "-t", "-d1", v->blk_device, num_sectors, NULL};
result = exec_cmd(f2fs_path, (char* const*)f2fs_argv);
free(num_sectors);
}
if (result != 0) {
LOGE("format_volume: make %s failed on %s with %d(%s)\n", v->fs_type, v->blk_device, result, strerror(errno));
return -1;
}
return 0;
}
LOGE("format_volume: fs_type \"%s\" unsupported\n", v->fs_type);
return -1;
}
/* When multiple fstab records share the same mount_point, it will
* try to mount each one in turn, and ignore any duplicates after a
* first successful mount.
* Returns -1 on error, and FS_MGR_MNTALL_* otherwise.
*/
int fs_mgr_mount_all(struct fstab *fstab)
{
int i = 0;
int encryptable = FS_MGR_MNTALL_DEV_NOT_ENCRYPTED;
int error_count = 0;
int mret = -1;
int mount_errno = 0;
int attempted_idx = -1;
if (!fstab) {
return -1;
}
for (i = 0; i < fstab->num_entries; i++) {
/* Don't mount entries that are managed by vold */
if (fstab->recs[i].fs_mgr_flags & (MF_VOLDMANAGED | MF_RECOVERYONLY)) {
continue;
}
/* Skip swap and raw partition entries such as boot, recovery, etc */
if (!strcmp(fstab->recs[i].fs_type, "swap") ||
!strcmp(fstab->recs[i].fs_type, "emmc") ||
!strcmp(fstab->recs[i].fs_type, "mtd")) {
continue;
}
if (fstab->recs[i].fs_mgr_flags & MF_WAIT) {
wait_for_file(fstab->recs[i].blk_device, WAIT_TIMEOUT);
}
if ((fstab->recs[i].fs_mgr_flags & MF_VERIFY) && device_is_secure()) {
int rc = fs_mgr_setup_verity(&fstab->recs[i]);
if (device_is_debuggable() && rc == FS_MGR_SETUP_VERITY_DISABLED) {
INFO("Verity disabled");
} else if (rc != FS_MGR_SETUP_VERITY_SUCCESS) {
ERROR("Could not set up verified partition, skipping!\n");
continue;
}
}
int last_idx_inspected;
int top_idx = i;
mret = mount_with_alternatives(fstab, i, &last_idx_inspected, &attempted_idx);
i = last_idx_inspected;
mount_errno = errno;
/* Deal with encryptability. */
if (!mret) {
/* If this is encryptable, need to trigger encryption */
if ( (fstab->recs[attempted_idx].fs_mgr_flags & MF_FORCECRYPT)
|| (device_is_force_encrypted()
&& fs_mgr_is_encryptable(&fstab->recs[attempted_idx]))) {
if (umount(fstab->recs[attempted_idx].mount_point) == 0) {
if (encryptable == FS_MGR_MNTALL_DEV_NOT_ENCRYPTED) {
ERROR("Will try to encrypt %s %s\n", fstab->recs[attempted_idx].mount_point,
fstab->recs[attempted_idx].fs_type);
encryptable = FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION;
} else {
ERROR("Only one encryptable/encrypted partition supported\n");
encryptable = FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED;
}
} else {
INFO("Could not umount %s - allow continue unencrypted\n",
fstab->recs[attempted_idx].mount_point);
continue;
}
}
/* Success! Go get the next one */
continue;
}
/* mount(2) returned an error, handle the encryptable/formattable case */
bool wiped = partition_wiped(fstab->recs[top_idx].blk_device);
if (mret && mount_errno != EBUSY && mount_errno != EACCES &&
fs_mgr_is_formattable(&fstab->recs[top_idx]) && wiped) {
/* top_idx and attempted_idx point at the same partition, but sometimes
* at two different lines in the fstab. Use the top one for formatting
* as that is the preferred one.
*/
ERROR("%s(): %s is wiped and %s %s is formattable. Format it.\n", __func__,
fstab->recs[top_idx].blk_device, fstab->recs[top_idx].mount_point,
fstab->recs[top_idx].fs_type);
if (fs_mgr_is_encryptable(&fstab->recs[top_idx]) &&
strcmp(fstab->recs[top_idx].key_loc, KEY_IN_FOOTER)) {
int fd = open(fstab->recs[top_idx].key_loc, O_WRONLY, 0644);
if (fd >= 0) {
INFO("%s(): also wipe %s\n", __func__, fstab->recs[top_idx].key_loc);
wipe_block_device(fd, get_file_size(fd));
close(fd);
} else {
ERROR("%s(): %s wouldn't open (%s)\n", __func__,
fstab->recs[top_idx].key_loc, strerror(errno));
}
}
if (fs_mgr_do_format(&fstab->recs[top_idx]) == 0) {
/* Let's replay the mount actions. */
i = top_idx - 1;
continue;
}
}
if (mret && mount_errno != EBUSY && mount_errno != EACCES &&
fs_mgr_is_encryptable(&fstab->recs[attempted_idx])) {
if (wiped) {
ERROR("%s(): %s is wiped and %s %s is encryptable. Suggest recovery...\n", __func__,
fstab->recs[attempted_idx].blk_device, fstab->recs[attempted_idx].mount_point,
fstab->recs[attempted_idx].fs_type);
encryptable = FS_MGR_MNTALL_DEV_NEEDS_RECOVERY;
continue;
} else {
/* Need to mount a tmpfs at this mountpoint for now, and set
* properties that vold will query later for decrypting
*/
ERROR("%s(): possibly an encryptable blkdev %s for mount %s type %s )\n", __func__,
fstab->recs[attempted_idx].blk_device, fstab->recs[attempted_idx].mount_point,
fstab->recs[attempted_idx].fs_type);
if (fs_mgr_do_tmpfs_mount(fstab->recs[attempted_idx].mount_point) < 0) {
++error_count;
continue;
}
}
encryptable = FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED;
} else {
ERROR("Failed to mount an un-encryptable or wiped partition on"
"%s at %s options: %s error: %s\n",
fstab->recs[attempted_idx].blk_device, fstab->recs[attempted_idx].mount_point,
fstab->recs[attempted_idx].fs_options, strerror(mount_errno));
++error_count;
continue;
}
}
if (error_count) {
return -1;
} else {
return encryptable;
}
}
int format_volume(const char* volume) {
time_t start, end;
start = time((time_t *)NULL);
printf("format %s start=%u\n", volume, (unsigned int)start);
#if defined(CACHE_MERGE_SUPPORT)
char *target_volume = (char *)volume;
if (strcmp(target_volume, "/cache") == 0) {
// we cannot mount data since partition size changed
// clear cache folder when data mounted
if (part_size_changed) {
LOGI("partition size changed, clear cache folder when data mounted...\n");
need_clear_cache = 1;
// change format volume name to format actual cache partition
target_volume = "/.cache";
} else {
// clear DATA_CACHE_ROOT
if (ensure_path_mounted(DATA_CACHE_ROOT) != 0) {
LOGE("Can't mount %s while clearing cache!\n", DATA_CACHE_ROOT);
return -1;
}
if (remove_dir(DATA_CACHE_ROOT)) {
LOGE("remove_dir %s error: %s\n", DATA_CACHE_ROOT, strerror(errno));
return -1;
}
if (mkdir(DATA_CACHE_ROOT, 0770) != 0) {
LOGE("Can't mkdir %s (%s)\n", DATA_CACHE_ROOT, strerror(errno));
return -1;
}
LOGI("format cache successfully!\n");
end = time((time_t *)NULL);
printf("format end=%u duration=%u\n", (unsigned int)end, (unsigned int)(end - start));
return 0;
}
}
Volume* v = volume_for_path(target_volume);
if (v == NULL) {
LOGE("unknown volume \"%s\"\n", target_volume);
return -1;
}
if (strcmp(v->fs_type, "ramdisk") == 0) {
// you can't format the ramdisk.
LOGE("can't format_volume \"%s\"", target_volume);
return -1;
}
if (strcmp(v->mount_point, target_volume) != 0) {
LOGE("can't give path \"%s\" to format_volume\n", target_volume);
return -1;
}
if (ensure_path_unmounted(target_volume) != 0) {
LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point);
return -1;
}
#else
Volume* v = volume_for_path(volume);
if (v == NULL) {
LOGE("unknown volume \"%s\"\n", volume);
return -1;
}
if (strcmp(v->fs_type, "ramdisk") == 0) {
// you can't format the ramdisk.
LOGE("can't format_volume \"%s\"", volume);
return -1;
}
if (strcmp(v->mount_point, volume) != 0) {
LOGE("can't give path \"%s\" to format_volume\n", volume);
return -1;
}
if (ensure_path_unmounted(volume) != 0) {
LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point);
return -1;
}
#endif
#if defined (UBIFS_SUPPORT)
if (strcmp(v->fs_type, "ubifs") == 0) {
int ret;
ret = ubi_format(v->mount_point);
if (!ret) {
end = time((time_t *)NULL);
printf("format end=%u duration=%u\n", (unsigned int)end, (unsigned int)(end - start));
return 0;
} else {
LOGE("Ubiformat failed on \"%s\"\n", v->mount_point);
}
#if 0
int ret;
//Remove volume
if(ubi_rmvol_user(v->mount_point)!=0){
LOGE("failed to remove %s\n", v->blk_device);
return -1;
}
//Make volume
ret = ubi_mkvol_user(v->mount_point);
if(!ret){
printf("%s volume made\n", v->blk_device);
return 0;
}
#endif
}
#endif
if (strcmp(v->fs_type, "yaffs2") == 0 || strcmp(v->fs_type, "mtd") == 0) {
mtd_scan_partitions();
const MtdPartition* partition = mtd_find_partition_by_name(v->blk_device);
if (partition == NULL) {
LOGE("format_volume: no MTD partition \"%s\"\n", v->blk_device);
return -1;
}
MtdWriteContext *write = mtd_write_partition(partition);
if (write == NULL) {
LOGW("format_volume: can't open MTD \"%s\"\n", v->blk_device);
return -1;
} else if (mtd_erase_blocks(write, -1) == (off_t) -1) {
LOGW("format_volume: can't erase MTD \"%s\"\n", v->blk_device);
mtd_write_close(write);
return -1;
} else if (mtd_write_close(write)) {
LOGW("format_volume: can't close MTD \"%s\"\n", v->blk_device);
return -1;
}
end = time((time_t *)NULL);
printf("format end=%u duration=%u\n", (unsigned int)end, (unsigned int)(end - start));
return 0;
}
if (strcmp(v->fs_type, "ext4") == 0 || strcmp(v->fs_type, "f2fs") == 0) {
if (!mt_is_support_gpt()) {
#if defined(HAVE_ANDROID_OS) && !defined(ARCH_X86) //wschen 2012-07-10
int fd;
struct msdc_ioctl msdc_io;
fd = open("/dev/misc-sd", O_RDONLY);
if (fd < 0) {
LOGE("open: /dev/misc-sd failed\n");
return -1;
}
msdc_io.opcode = MSDC_ERASE_PARTITION;
#if defined(CACHE_MERGE_SUPPORT)
if (!strcmp(target_volume, "/.cache")) {
msdc_io.buffer = (unsigned int*) "cache";
msdc_io.total_size = 6;
} else if (!strcmp(target_volume, "/data")) {
msdc_io.buffer = (unsigned int*) "usrdata";
msdc_io.total_size = 8;
}
#else
if (!strcmp(volume, "/cache")) {
msdc_io.buffer = (unsigned int*) "cache";
msdc_io.total_size = 6;
} else if (!strcmp(volume, "/data")) {
msdc_io.buffer = (unsigned int*) "usrdata";
msdc_io.total_size = 8;
}
#endif
ioctl(fd, 0, &msdc_io);
close(fd);
#endif
} // end of not support_gpt
// if there's a key_loc that looks like a path, it should be a
// block device for storing encryption metadata. wipe it too.
if (v->key_loc != NULL && v->key_loc[0] == '/') {
LOGI("wiping %s\n", v->key_loc);
int fd = open(v->key_loc, O_WRONLY | O_CREAT, 0644);
if (fd < 0) {
LOGE("format_volume: failed to open %s\n", v->key_loc);
return -1;
}
wipe_block_device(fd, get_file_size(fd));
close(fd);
}
#ifndef CRYPT_FOOTER_OFFSET
#define CRYPT_FOOTER_OFFSET (0)
#endif
ssize_t length = 0;
if (v->length != 0) {
length = v->length;
} else if (v->key_loc != NULL && strcmp(v->key_loc, "footer") == 0) {
length = -CRYPT_FOOTER_OFFSET;
}
int result = 0;
if (strcmp(v->fs_type, "ext4") == 0) {
#if defined(CACHE_MERGE_SUPPORT)
result = make_ext4fs(v->blk_device, length, target_volume, sehandle);
#else
LOGE("Before make_ext4fs v->blk_device:%s length:%lld volume=%s\n", v->blk_device, length, volume);
result = make_ext4fs(v->blk_device, length, volume, sehandle);
#endif
} else { /* Has to be f2fs because we checked earlier. */
if (v->key_loc != NULL && strcmp(v->key_loc, "footer") == 0 && length < 0) {
LOGE("format_volume: crypt footer + negative length (%zd) not supported on %s\n", length, v->fs_type);
return -1;
}
if (length < 0) {
LOGE("format_volume: negative length (%zd) not supported on %s\n", length, v->fs_type);
return -1;
}
char *num_sectors;
if (asprintf(&num_sectors, "%zd", length / 512) <= 0) {
LOGE("format_volume: failed to create %s command for %s\n", v->fs_type, v->blk_device);
return -1;
}
const char *f2fs_path = "/sbin/mkfs.f2fs";
const char* const f2fs_argv[] = {"mkfs.f2fs", "-t", "-d1", v->blk_device, num_sectors, NULL};
result = exec_cmd(f2fs_path, (char* const*)f2fs_argv);
free(num_sectors);
}
if (result != 0) {
LOGE("format_volume: make %s failed on %s with %d(%s)\n", v->fs_type, v->blk_device, result, strerror(errno));
return -1;
}
end = time((time_t *)NULL);
printf("format end=%u duration=%u\n", (unsigned int)end, (unsigned int)(end - start));
return 0;
}
LOGE("format_volume: fs_type \"%s\" unsupported\n", v->fs_type);
return -1;
}
int format_volume(const char* volume, bool force) {
if (strcmp(volume, "media") == 0) {
if (!is_data_media()) {
return 0;
}
if (ensure_path_mounted("/data") != 0) {
LOGE("format_volume failed to mount /data\n");
return -1;
}
int rc = 0;
rc = rmtree_except("/data/media", NULL);
ensure_path_unmounted("/data");
return rc;
}
fstab_rec* v = volume_for_path(volume);
if (v == NULL) {
LOGE("unknown volume \"%s\"\n", volume);
return -1;
}
if (strcmp(v->fs_type, "ramdisk") == 0) {
// you can't format the ramdisk.
LOGE("can't format_volume \"%s\"", volume);
return -1;
}
if (strcmp(v->mount_point, volume) != 0) {
LOGE("can't give path \"%s\" to format_volume\n", volume);
return -1;
}
if (strcmp(volume, "/data") == 0 && is_data_media() && !force) {
if (ensure_path_mounted("/data") == 0) {
// Preserve .layout_version to avoid "nesting bug"
LOGI("Preserving layout version\n");
unsigned char layout_buf[256];
ssize_t layout_buflen = -1;
int fd;
fd = open("/data/.layout_version", O_RDONLY);
if (fd != -1) {
layout_buflen = read(fd, layout_buf, sizeof(layout_buf));
close(fd);
}
int rc = rmtree_except("/data", "media");
// Restore .layout_version
if (layout_buflen > 0) {
LOGI("Restoring layout version\n");
fd = open("/data/.layout_version", O_WRONLY | O_CREAT | O_EXCL, 0600);
if (fd != -1) {
write(fd, layout_buf, layout_buflen);
close(fd);
}
}
ensure_path_unmounted(volume);
return rc;
}
LOGE("format_volume failed to mount /data, formatting instead\n");
}
if (ensure_path_unmounted(volume) != 0) {
LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point);
return -1;
}
// Only use vold format for exact matches otherwise /sdcard will be
// formatted instead of /storage/sdcard0/.android_secure
if (fs_mgr_is_voldmanaged(v) && strcmp(volume, v->mount_point) == 0) {
if (ensure_path_unmounted(volume) != 0) {
LOGE("format_volume failed to unmount %s", v->mount_point);
}
return vold_format_volume(v->mount_point, 1);
}
if (strcmp(v->fs_type, "yaffs2") == 0 || strcmp(v->fs_type, "mtd") == 0) {
mtd_scan_partitions();
const MtdPartition* partition = mtd_find_partition_by_name(v->blk_device);
if (partition == NULL) {
LOGE("format_volume: no MTD partition \"%s\"\n", v->blk_device);
return -1;
}
MtdWriteContext *write = mtd_write_partition(partition);
if (write == NULL) {
LOGW("format_volume: can't open MTD \"%s\"\n", v->blk_device);
return -1;
} else if (mtd_erase_blocks(write, -1) == (off_t) -1) {
LOGW("format_volume: can't erase MTD \"%s\"\n", v->blk_device);
mtd_write_close(write);
return -1;
} else if (mtd_write_close(write)) {
LOGW("format_volume: can't close MTD \"%s\"\n", v->blk_device);
return -1;
}
return 0;
}
if (strcmp(v->fs_type, "ext4") == 0 || strcmp(v->fs_type, "f2fs") == 0) {
// if there's a key_loc that looks like a path, it should be a
// block device for storing encryption metadata. wipe it too.
if (v->key_loc != NULL && v->key_loc[0] == '/') {
LOGI("wiping %s\n", v->key_loc);
int fd = open(v->key_loc, O_WRONLY | O_CREAT, 0644);
if (fd < 0) {
LOGE("format_volume: failed to open %s\n", v->key_loc);
return -1;
}
wipe_block_device(fd, get_file_size(fd));
close(fd);
}
ssize_t length = 0;
if (v->length != 0) {
length = v->length;
} else if (v->key_loc != NULL && strcmp(v->key_loc, "footer") == 0) {
length = -CRYPT_FOOTER_OFFSET;
}
int result;
if (strcmp(v->fs_type, "ext4") == 0) {
result = make_ext4fs(v->blk_device, length, volume, sehandle);
} else { /* Has to be f2fs because we checked earlier. */
char bytes_reserved[10] = {0};
if (v->key_loc != NULL && strcmp(v->key_loc, "footer") == 0) {
snprintf(bytes_reserved, sizeof(bytes_reserved), "%d", CRYPT_FOOTER_OFFSET);
}
char *num_sectors;
if (asprintf(&num_sectors, "%zd", length / 512) <= 0) {
LOGE("format_volume: failed to create %s command for %s\n", v->fs_type, v->blk_device);
return -1;
}
const char *f2fs_path = "/sbin/mkfs.f2fs";
const char* const f2fs_argv[] = {"mkfs.f2fs", "-t", "-d1", "-r",
bytes_reserved, v->blk_device, num_sectors, NULL};
result = exec_cmd(f2fs_path, (char* const*)f2fs_argv);
free(num_sectors);
}
if (result != 0) {
LOGE("format_volume: make %s failed on %s with %d(%s)\n", v->fs_type, v->blk_device, result, strerror(errno));
return -1;
}
return 0;
}
LOGE("format_volume: fs_type \"%s\" unsupported\n", v->fs_type);
return -1;
}
int make_ext4fs_internal(int fd, const char *_directory, const char *_target_out_directory,
const char *_mountpoint, fs_config_func_t fs_config_func, int gzip,
int sparse, int crc, int wipe, int real_uuid,
struct selabel_handle *sehnd, int verbose, time_t fixed_time,
FILE* block_list_file)
{
u32 root_inode_num;
u16 root_mode;
char *mountpoint;
char *directory = NULL;
char *target_out_directory = NULL;
if (setjmp(setjmp_env))
return EXIT_FAILURE; /* Handle a call to longjmp() */
info.block_device = is_block_device_fd(fd);
if (info.block_device && (sparse || gzip || crc)) {
fprintf(stderr, "No sparse/gzip/crc allowed for block device\n");
return EXIT_FAILURE;
}
if (_mountpoint == NULL) {
mountpoint = strdup("");
} else {
mountpoint = canonicalize_abs_slashes(_mountpoint);
}
if (_directory) {
directory = canonicalize_rel_slashes(_directory);
}
if (_target_out_directory) {
target_out_directory = canonicalize_rel_slashes(_target_out_directory);
}
if (info.len <= 0)
info.len = get_file_size(fd);
if (info.len <= 0) {
fprintf(stderr, "Need size of filesystem\n");
return EXIT_FAILURE;
}
if (info.block_size <= 0)
info.block_size = compute_block_size();
/* Round down the filesystem length to be a multiple of the block size */
info.len &= ~((u64)info.block_size - 1);
if (info.journal_blocks == 0)
info.journal_blocks = compute_journal_blocks();
if (info.no_journal == 0)
info.feat_compat = EXT4_FEATURE_COMPAT_HAS_JOURNAL;
else
info.journal_blocks = 0;
if (info.blocks_per_group <= 0)
info.blocks_per_group = compute_blocks_per_group();
if (info.inodes <= 0)
info.inodes = compute_inodes();
if (info.inode_size <= 0)
info.inode_size = 256;
if (info.label == NULL)
info.label = "";
info.inodes_per_group = compute_inodes_per_group();
info.feat_compat |=
EXT4_FEATURE_COMPAT_RESIZE_INODE |
EXT4_FEATURE_COMPAT_EXT_ATTR;
info.feat_ro_compat |=
EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER |
EXT4_FEATURE_RO_COMPAT_LARGE_FILE |
EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
info.feat_incompat |=
EXT4_FEATURE_INCOMPAT_EXTENTS |
EXT4_FEATURE_INCOMPAT_FILETYPE;
info.bg_desc_reserve_blocks = compute_bg_desc_reserve_blocks();
printf("Creating filesystem with parameters:\n");
printf(" Size: %"PRIu64"\n", info.len);
printf(" Block size: %d\n", info.block_size);
printf(" Blocks per group: %d\n", info.blocks_per_group);
printf(" Inodes per group: %d\n", info.inodes_per_group);
printf(" Inode size: %d\n", info.inode_size);
printf(" Journal blocks: %d\n", info.journal_blocks);
printf(" Label: %s\n", info.label);
ext4_create_fs_aux_info();
printf(" Blocks: %"PRIu64"\n", aux_info.len_blocks);
printf(" Block groups: %d\n", aux_info.groups);
printf(" Reserved block group size: %d\n", info.bg_desc_reserve_blocks);
ext4_sparse_file = sparse_file_new(info.block_size, info.len);
block_allocator_init();
ext4_fill_in_sb(real_uuid);
if (reserve_inodes(0, 10) == EXT4_ALLOCATE_FAILED)
error("failed to reserve first 10 inodes");
if (info.feat_compat & EXT4_FEATURE_COMPAT_HAS_JOURNAL)
ext4_create_journal_inode();
if (info.feat_compat & EXT4_FEATURE_COMPAT_RESIZE_INODE)
ext4_create_resize_inode();
#ifdef USE_MINGW
// Windows needs only 'create an empty fs image' functionality
assert(!directory);
root_inode_num = build_default_directory_structure(mountpoint, sehnd);
#else
if (directory)
root_inode_num = build_directory_structure(directory, mountpoint, target_out_directory, 0,
fs_config_func, sehnd, verbose, fixed_time);
else
root_inode_num = build_default_directory_structure(mountpoint, sehnd);
#endif
root_mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
inode_set_permissions(root_inode_num, root_mode, 0, 0, 0);
#ifndef USE_MINGW
if (sehnd) {
char *secontext = NULL;
if (selabel_lookup(sehnd, &secontext, mountpoint, S_IFDIR) < 0) {
error("cannot lookup security context for %s", mountpoint);
}
if (secontext) {
if (verbose) {
printf("Labeling %s as %s\n", mountpoint, secontext);
}
inode_set_selinux(root_inode_num, secontext);
}
freecon(secontext);
}
#endif
ext4_update_free();
if (block_list_file) {
size_t dirlen = directory ? strlen(directory) : 0;
struct block_allocation* p = get_saved_allocation_chain();
while (p) {
if (directory && strncmp(p->filename, directory, dirlen) == 0) {
// substitute mountpoint for the leading directory in the filename, in the output file
fprintf(block_list_file, "%s%s", mountpoint, p->filename + dirlen);
} else {
fprintf(block_list_file, "%s", p->filename);
}
print_blocks(block_list_file, p);
struct block_allocation* pn = p->next;
free_alloc(p);
p = pn;
}
}
printf("Created filesystem with %d/%d inodes and %d/%d blocks\n",
aux_info.sb->s_inodes_count - aux_info.sb->s_free_inodes_count,
aux_info.sb->s_inodes_count,
aux_info.sb->s_blocks_count_lo - aux_info.sb->s_free_blocks_count_lo,
aux_info.sb->s_blocks_count_lo);
if (wipe && WIPE_IS_SUPPORTED) {
wipe_block_device(fd, info.len);
}
write_ext4_image(fd, gzip, sparse, crc);
sparse_file_destroy(ext4_sparse_file);
ext4_sparse_file = NULL;
free(mountpoint);
free(directory);
return 0;
}
