void load_volume_table()
{
int i;
int ret;
fstab = fs_mgr_read_fstab("/etc/recovery.fstab");
if (!fstab) {
LOGE("failed to read /etc/recovery.fstab\n");
return;
}
ret = fs_mgr_add_entry(fstab, "/tmp", "ramdisk", "ramdisk");
if (ret < 0 ) {
LOGE("failed to add /tmp entry to fstab\n");
fs_mgr_free_fstab(fstab);
fstab = NULL;
return;
}
printf("recovery filesystem table\n");
printf("=========================\n");
for (i = 0; i < fstab->num_entries; ++i) {
Volume* v = &fstab->recs[i];
printf(" %d %s %s %s %lld\n", i, v->mount_point, v->fs_type,
v->blk_device, v->length);
}
printf("\n");
}
int main(int argc, char *argv[])
{
int a_flag=0;
int u_flag=0;
int n_flag=0;
char *n_name=NULL;
char *n_blk_dev=NULL;
char *fstab_file=NULL;
struct fstab *fstab=NULL;
klog_set_level(6);
parse_options(argc, argv, &a_flag, &u_flag, &n_flag, &n_name, &n_blk_dev);
/* The name of the fstab file is last, after the option */
fstab_file = argv[argc - 1];
fstab = fs_mgr_read_fstab(fstab_file);
if (a_flag) {
return fs_mgr_mount_all(fstab);
} else if (n_flag) {
return fs_mgr_do_mount(fstab, n_name, n_blk_dev, 0);
} else if (u_flag) {
return fs_mgr_unmount_all(fstab);
} else {
ERROR("%s: Internal error, unknown option\n", me);
exit(1);
}
fs_mgr_free_fstab(fstab);
/* Should not get here */
exit(1);
}
void TrimTask::addFromFstab() {
struct fstab *fstab;
struct fstab_rec *prev_rec = NULL;
fstab = fs_mgr_read_fstab(android::vold::DefaultFstabPath().c_str());
for (int i = 0; i < fstab->num_entries; i++) {
/* Skip raw partitions */
if (!strcmp(fstab->recs[i].fs_type, "emmc") ||
!strcmp(fstab->recs[i].fs_type, "mtd")) {
continue;
}
/* Skip read-only filesystems */
if (fstab->recs[i].flags & MS_RDONLY) {
continue;
}
if (fs_mgr_is_voldmanaged(&fstab->recs[i])) {
continue; /* Should we trim fat32 filesystems? */
}
if (fs_mgr_is_notrim(&fstab->recs[i])) {
continue;
}
/* Skip the multi-type partitions, which are required to be following each other.
* See fs_mgr.c's mount_with_alternatives().
*/
if (prev_rec && !strcmp(prev_rec->mount_point, fstab->recs[i].mount_point)) {
continue;
}
mPaths.push_back(fstab->recs[i].mount_point);
prev_rec = &fstab->recs[i];
}
fs_mgr_free_fstab(fstab);
}
// Returns the device used to mount a directory in the fstab.
static std::string find_fstab_mount(const char* dir) {
std::string fstab_filename = "/fstab." + android::base::GetProperty("ro.hardware", "");
struct fstab* fstab = fs_mgr_read_fstab(fstab_filename.c_str());
struct fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab, dir);
std::string dev = rec ? std::string(rec->blk_device) : "";
fs_mgr_free_fstab(fstab);
return dev;
}
void load_volume_table()
{
int i;
int ret;
fstab = fs_mgr_read_fstab("/etc/recovery.fstab");
if (!fstab) {
LOGE("failed to read /etc/recovery.fstab\n");
LOGE("try read other fstab\n");
fstab = mt_read_fstab();
if (!fstab) {
LOGE("failed to read fstab\n");
return;
}
}
ret = fs_mgr_add_entry(fstab, "/tmp", "ramdisk", "ramdisk");
if (ret < 0 ) {
LOGE("failed to add /tmp entry to fstab\n");
fs_mgr_free_fstab(fstab);
fstab = NULL;
return;
}
ret = mt_load_volume_table(fstab);
if (ret < 0 ) {
LOGE("mt_load_volume_table fail to add entry to fstab\n");
fs_mgr_free_fstab(fstab);
fstab = NULL;
return;
}
mt_ensure_dev_ready("/misc");
mt_ensure_dev_ready("/cache");
mt_fstab_translation_NAND(fstab);
printf("recovery filesystem table\n");
printf("=========================\n");
for (i = 0; i < fstab->num_entries; ++i) {
Volume* v = &fstab->recs[i];
printf(" %d %s %s %s %lld\n", i, v->mount_point, v->fs_type,
v->blk_device, v->length);
}
printf("\n");
}
int do_mount_all(int nargs, char **args)
{
pid_t pid;
int ret = -1;
int child_ret = -1;
int status;
const char *prop;
struct fstab *fstab;
if (nargs != 2) {
return -1;
}
/*
* Call fs_mgr_mount_all() to mount all filesystems. We fork(2) and
* do the call in the child to provide protection to the main init
* process if anything goes wrong (crash or memory leak), and wait for
* the child to finish in the parent.
*/
pid = fork();
if (pid > 0) {
/* Parent. Wait for the child to return */
waitpid(pid, &status, 0);
if (WIFEXITED(status)) {
ret = WEXITSTATUS(status);
} else {
ret = -1;
}
} else if (pid == 0) {
/* child, call fs_mgr_mount_all() */
klog_set_level(6); /* So we can see what fs_mgr_mount_all() does */
fstab = fs_mgr_read_fstab(args[1]);
child_ret = fs_mgr_mount_all(fstab);
fs_mgr_free_fstab(fstab);
if (child_ret == -1) {
ERROR("fs_mgr_mount_all returned an error\n");
}
exit(child_ret);
} else {
/* fork failed, return an error */
return -1;
}
/* ret is 1 if the device is encrypted, 0 if not, and -1 on error */
if (ret == 1) {
property_set("ro.crypto.state", "encrypted");
property_set("vold.decrypt", "1");
} else if (ret == 0) {
property_set("ro.crypto.state", "unencrypted");
/* If fs_mgr determined this is an unencrypted device, then trigger
* that action.
*/
action_for_each_trigger("nonencrypted", action_add_queue_tail);
}
return ret;
}
static int do_swapon_all(const std::vector<std::string>& args) {
struct fstab *fstab;
int ret;
fstab = fs_mgr_read_fstab(args[1].c_str());
ret = fs_mgr_swapon_all(fstab);
fs_mgr_free_fstab(fstab);
return ret;
}
int do_swapon_all(int nargs, char **args)
{
struct fstab *fstab;
int ret;
fstab = fs_mgr_read_fstab(args[1]);
ret = fs_mgr_swapon_all(fstab);
fs_mgr_free_fstab(fstab);
return ret;
}
// Returns the device used to mount a directory in the fstab.
static std::string find_fstab_mount(const char* dir) {
char propbuf[PROPERTY_VALUE_MAX];
property_get("ro.hardware", propbuf, "");
std::string fstab_filename = kFstab_Prefix + propbuf;
struct fstab* fstab = fs_mgr_read_fstab(fstab_filename.c_str());
struct fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab, dir);
std::string dev = rec ? std::string(rec->blk_device) : "";
fs_mgr_free_fstab(fstab);
return dev;
}
void load_volume_table()
{
int i;
int ret;
fstab = fs_mgr_read_fstab("/etc/recovery.fstab");
if (!fstab) {
LOGE("failed to read /etc/recovery.fstab\n");
return;
}
ret = fs_mgr_add_entry(fstab, "/tmp", "ramdisk", "ramdisk");
if (ret < 0 ) {
LOGE("failed to add /tmp entry to fstab\n");
fs_mgr_free_fstab(fstab);
fstab = NULL;
return;
}
// Create a boring /etc/fstab so tools like Busybox work
FILE *file = fopen("/etc/fstab", "w");
if (file == NULL) {
LOGW("Unable to create /etc/fstab!\n");
return;
}
is_datamedia = 1;
printf("recovery filesystem table\n");
printf("=========================\n");
for (i = 0; i < fstab->num_entries; ++i) {
fstab_rec* v = &fstab->recs[i];
printf(" %d %s %s %s %lld\n", i, v->mount_point, v->fs_type,
v->blk_device, v->length);
write_fstab_entry(v, file);
if (is_volume_primary_storage(v)) {
is_datamedia = 0;
}
}
fclose(file);
printf("\n");
}
void load_volume_table() {
int i;
int ret;
fstab = fs_mgr_read_fstab("/etc/recovery.fstab");
if (!fstab) {
LOGE("failed to read /etc/recovery.fstab\n");
return;
}
ret = fs_mgr_add_entry(fstab, "/tmp", "ramdisk", "ramdisk", 0);
if (ret < 0 ) {
LOGE("failed to add /tmp entry to fstab\n");
fs_mgr_free_fstab(fstab);
fstab = NULL;
return;
}
// Process vold-managed volumes with mount point "auto"
for (i = 0; i < fstab->num_entries; ++i) {
Volume* v = &fstab->recs[i];
if (fs_mgr_is_voldmanaged(v) && strcmp(v->mount_point, "auto") == 0) {
char mount[PATH_MAX];
// Set the mount point to /storage/label which as used by vold
snprintf(mount, PATH_MAX, "/storage/%s", v->label);
free(v->mount_point);
v->mount_point = strdup(mount);
}
}
fprintf(stderr, "recovery filesystem table\n");
fprintf(stderr, "=========================\n");
for (i = 0; i < fstab->num_entries; ++i) {
Volume* v = &fstab->recs[i];
fprintf(stderr, " %d %s %s %s %lld\n", i, v->mount_point, v->fs_type,
v->blk_device, v->length);
}
fprintf(stderr, "\n");
}
struct fstab *fs_mgr_read_fstab(const char *fstab_path)
{
FILE *fstab_file;
int cnt, entries;
ssize_t len;
size_t alloc_len = 0;
char *line = NULL;
const char *delim = " \t";
char *save_ptr, *p;
struct fstab *fstab = NULL;
struct fstab_rec *recs;
struct fs_mgr_flag_values flag_vals;
#define FS_OPTIONS_LEN 1024
char tmp_fs_options[FS_OPTIONS_LEN];
fstab_file = fopen(fstab_path, "r");
if (!fstab_file) {
ERROR("Cannot open file %s\n", fstab_path);
return 0;
}
entries = 0;
while ((len = getline(&line, &alloc_len, fstab_file)) != -1) {
/* if the last character is a newline, shorten the string by 1 byte */
if (line[len - 1] == '\n') {
line[len - 1] = '\0';
}
/* Skip any leading whitespace */
p = line;
while (isspace(*p)) {
p++;
}
/* ignore comments or empty lines */
if (*p == '#' || *p == '\0')
continue;
entries++;
}
if (!entries) {
ERROR("No entries found in fstab\n");
goto err;
}
/* Allocate and init the fstab structure */
fstab = calloc(1, sizeof(struct fstab));
fstab->num_entries = entries;
fstab->fstab_filename = strdup(fstab_path);
fstab->recs = calloc(fstab->num_entries, sizeof(struct fstab_rec));
fseek(fstab_file, 0, SEEK_SET);
cnt = 0;
while ((len = getline(&line, &alloc_len, fstab_file)) != -1) {
/* if the last character is a newline, shorten the string by 1 byte */
if (line[len - 1] == '\n') {
line[len - 1] = '\0';
}
/* Skip any leading whitespace */
p = line;
while (isspace(*p)) {
p++;
}
/* ignore comments or empty lines */
if (*p == '#' || *p == '\0')
continue;
/* If a non-comment entry is greater than the size we allocated, give an
* error and quit. This can happen in the unlikely case the file changes
* between the two reads.
*/
if (cnt >= entries) {
ERROR("Tried to process more entries than counted\n");
break;
}
if (!(p = strtok_r(line, delim, &save_ptr))) {
ERROR("Error parsing mount source\n");
goto err;
}
fstab->recs[cnt].blk_device = strdup(p);
if (!(p = strtok_r(NULL, delim, &save_ptr))) {
ERROR("Error parsing mount_point\n");
goto err;
}
fstab->recs[cnt].mount_point = strdup(p);
if (!(p = strtok_r(NULL, delim, &save_ptr))) {
ERROR("Error parsing fs_type\n");
goto err;
}
fstab->recs[cnt].fs_type = strdup(p);
if (!(p = strtok_r(NULL, delim, &save_ptr))) {
ERROR("Error parsing mount_flags\n");
goto err;
}
tmp_fs_options[0] = '\0';
fstab->recs[cnt].flags = parse_flags(p, mount_flags, NULL,
tmp_fs_options, FS_OPTIONS_LEN);
/* fs_options are optional */
if (tmp_fs_options[0]) {
fstab->recs[cnt].fs_options = strdup(tmp_fs_options);
} else {
fstab->recs[cnt].fs_options = NULL;
}
if (!(p = strtok_r(NULL, delim, &save_ptr))) {
ERROR("Error parsing fs_mgr_options\n");
goto err;
}
fstab->recs[cnt].fs_mgr_flags = parse_flags(p, fs_mgr_flags,
&flag_vals, NULL, 0);
fstab->recs[cnt].key_loc = flag_vals.key_loc;
fstab->recs[cnt].length = flag_vals.part_length;
fstab->recs[cnt].label = flag_vals.label;
fstab->recs[cnt].partnum = flag_vals.partnum;
fstab->recs[cnt].swap_prio = flag_vals.swap_prio;
fstab->recs[cnt].zram_size = flag_vals.zram_size;
cnt++;
}
fclose(fstab_file);
free(line);
return fstab;
err:
fclose(fstab_file);
free(line);
if (fstab)
fs_mgr_free_fstab(fstab);
return NULL;
}
/*
* This function might request a reboot, in which case it will
* not return.
*/
int do_mount_all(int nargs, char **args)
{
pid_t pid;
int ret = -1;
int child_ret = -1;
int status;
char boot_mode[PROP_VALUE_MAX] = {0};
struct fstab *fstab;
if (nargs != 2) {
return -1;
}
/*
* Call fs_mgr_mount_all() to mount all filesystems. We fork(2) and
* do the call in the child to provide protection to the main init
* process if anything goes wrong (crash or memory leak), and wait for
* the child to finish in the parent.
*/
pid = fork();
if (pid > 0) {
/* Parent. Wait for the child to return */
int wp_ret = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
if (wp_ret < 0) {
/* Unexpected error code. We will continue anyway. */
NOTICE("waitpid failed rc=%d: %s\n", wp_ret, strerror(errno));
}
if (WIFEXITED(status)) {
ret = WEXITSTATUS(status);
} else {
ret = -1;
}
} else if (pid == 0) {
/* child, call fs_mgr_mount_all() */
klog_set_level(6); /* So we can see what fs_mgr_mount_all() does */
fstab = fs_mgr_read_fstab(args[1]);
child_ret = fs_mgr_mount_all(fstab);
fs_mgr_free_fstab(fstab);
if (child_ret == -1) {
ERROR("fs_mgr_mount_all returned an error\n");
}
_exit(child_ret);
} else {
/* fork failed, return an error */
return -1;
}
if (ret == FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION) {
property_set("vold.decrypt", "trigger_encryption");
} else if (ret == FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED) {
property_set("ro.crypto.state", "encrypted");
property_set("ro.crypto.type", "block");
property_set("vold.decrypt", "trigger_default_encryption");
} else if (ret == FS_MGR_MNTALL_DEV_NOT_ENCRYPTED) {
property_set("ro.crypto.state", "unencrypted");
/* If fs_mgr determined this is an unencrypted device and we are
* not booting into ffbm(fast factory boot mode),then trigger
* that action.
*/
property_get("ro.bootmode", boot_mode);
if (strncmp(boot_mode, "ffbm", 4))
action_for_each_trigger("nonencrypted", action_add_queue_tail);
} else if (ret == FS_MGR_MNTALL_DEV_NEEDS_RECOVERY) {
/* Setup a wipe via recovery, and reboot into recovery */
ERROR("fs_mgr_mount_all suggested recovery, so wiping data via recovery.\n");
ret = wipe_data_via_recovery();
/* If reboot worked, there is no return. */
} else if (ret == FS_MGR_MNTALL_DEV_DEFAULT_FILE_ENCRYPTED) {
if (e4crypt_install_keyring()) {
return -1;
}
property_set("ro.crypto.state", "encrypted");
property_set("ro.crypto.type", "file");
// Although encrypted, we have device key, so we do not need to
// do anything different from the nonencrypted case.
property_get("ro.bootmode", boot_mode);
if (strncmp(boot_mode, "ffbm", 4))
action_for_each_trigger("nonencrypted", action_add_queue_tail);
} else if (ret == FS_MGR_MNTALL_DEV_NON_DEFAULT_FILE_ENCRYPTED) {
if (e4crypt_install_keyring()) {
return -1;
}
property_set("ro.crypto.state", "encrypted");
property_set("ro.crypto.type", "file");
property_set("vold.decrypt", "trigger_restart_min_framework");
} else if (ret > 0) {
ERROR("fs_mgr_mount_all returned unexpected error %d\n", ret);
}
/* else ... < 0: error */
return ret;
}
int main(int argc, char **argv)
{
struct fstab *fstab;
int ret=0, syspart, i, status;
char filenamePatched[PATH_MAX], filenameSystem[PATH_MAX];
// check arguments
if(argc!=2) {
ERROR("Invalid Arguments");
return -EINVAL;
}
// get syspart from cmdline
syspart = getDualbootSyspart();
if(syspart<0) {
ERROR("Cannot read system number");
return -EINVAL;
}
// patch fstab
sprintf(filenamePatched, "%s.patched", argv[1]);
sprintf(filenameSystem, "%s.system", argv[1]);
patch_fstab(argv[1], filenamePatched, filenameSystem, syspart);
// mount system
fstab = fs_mgr_read_fstab(filenameSystem);
ret = fs_mgr_mount_all(fstab);
fs_mgr_free_fstab(fstab);
if (ret == -1) {
ERROR("fs_mgr_mount_all returned an error\n");
}
// mount data
fstab = fs_mgr_read_fstab(argv[1]);
for (i = 0; i < fstab->num_entries; ++i) {
struct fstab_rec* v = &fstab->recs[i];
if(strcmp(PARTITION_USERDATA, v->blk_device))
continue;
if (v->fs_mgr_flags & MF_WAIT) {
wait_for_file(v->blk_device, WAIT_TIMEOUT);
}
if (v->fs_mgr_flags & MF_CHECK) {
check_fs(v->blk_device, v->fs_type, v->mount_point);
}
if(mountScriptExists()) {
char *e2fsck_argv[] = {
"/system/bin/mount_ext4.sh",
v->blk_device,
v->mount_point
};
ret = android_fork_execvp_ext(ARRAY_SIZE(e2fsck_argv), e2fsck_argv, &status, true, LOG_KLOG, true, NULL);
}
else {
ret = mount(v->blk_device, v->mount_point, v->fs_type, v->flags, v->fs_options);
}
}
fs_mgr_free_fstab(fstab);
if (ret == -1) {
ERROR("error mounting userdata\n");
}
return ret;
}
int boot_info_open_partition(const char *name, uint64_t *out_size, int flags)
{
char *path;
int fd;
struct fstab *fstab;
struct fstab_rec *record;
// We can't use fs_mgr to look up |name| because fstab doesn't list
// every slot partition (it uses the slotselect option to mask the
// suffix) and |slot| is expected to be of that form, e.g. boot_a.
//
// We can however assume that there's an entry for the /misc mount
// point and use that to get the device file for the misc
// partition. From there we'll assume that a by-name scheme is used
// so we can just replace the trailing "misc" by the given |name|,
// e.g.
//
// /dev/block/platform/soc.0/7824900.sdhci/by-name/misc ->
// /dev/block/platform/soc.0/7824900.sdhci/by-name/boot_a
//
// If needed, it's possible to relax this assumption in the future
// by trawling /sys/block looking for the appropriate sibling of
// misc and then finding an entry in /dev matching the sysfs entry.
fstab = open_fstab();
if (fstab == NULL)
return -1;
record = fs_mgr_get_entry_for_mount_point(fstab, "/misc");
if (record == NULL) {
fs_mgr_free_fstab(fstab);
return -1;
}
if (strcmp(name, "misc") == 0) {
path = strdup(record->blk_device);
} else {
size_t trimmed_len, name_len;
const char *end_slash = strrchr(record->blk_device, '/');
if (end_slash == NULL) {
fs_mgr_free_fstab(fstab);
return -1;
}
trimmed_len = end_slash - record->blk_device + 1;
name_len = strlen(name);
path = calloc(trimmed_len + name_len + 1, 1);
strncpy(path, record->blk_device, trimmed_len);
strncpy(path + trimmed_len, name, name_len);
}
fs_mgr_free_fstab(fstab);
fd = open(path, flags);
free(path);
// If we successfully opened the device, get size if requested.
if (fd != -1 && out_size != NULL) {
if (ioctl(fd, BLKGETSIZE64, out_size) != 0) {
close(fd);
return -1;
}
}
return fd;
}
/*
* This function might request a reboot, in which case it will
* not return.
*/
int do_mount_all(int nargs, char **args)
{
pid_t pid;
int ret = -1;
int child_ret = -1;
int status;
struct fstab *fstab;
if (nargs != 2) {
return -1;
}
/*
* Call fs_mgr_mount_all() to mount all filesystems. We fork(2) and
* do the call in the child to provide protection to the main init
* process if anything goes wrong (crash or memory leak), and wait for
* the child to finish in the parent.
*/
pid = fork();
if (pid > 0) {
/* Parent. Wait for the child to return */
int wp_ret = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
if (wp_ret < 0) {
/* Unexpected error code. We will continue anyway. */
NOTICE("waitpid failed rc=%d, errno=%d\n", wp_ret, errno);
}
if (WIFEXITED(status)) {
ret = WEXITSTATUS(status);
} else {
ret = -1;
}
} else if (pid == 0) {
/* child, call fs_mgr_mount_all() */
klog_set_level(6); /* So we can see what fs_mgr_mount_all() does */
fstab = fs_mgr_read_fstab(args[1]);
child_ret = fs_mgr_mount_all(fstab);
fs_mgr_free_fstab(fstab);
if (child_ret == -1) {
ERROR("fs_mgr_mount_all returned an error\n");
}
_exit(child_ret);
} else {
/* fork failed, return an error */
return -1;
}
if (ret == FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION) {
property_set("vold.decrypt", "trigger_encryption");
} else if (ret == FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED) {
property_set("ro.crypto.state", "encrypted");
property_set("vold.decrypt", "trigger_default_encryption");
} else if (ret == FS_MGR_MNTALL_DEV_NOT_ENCRYPTED) {
property_set("ro.crypto.state", "unencrypted");
/* If fs_mgr determined this is an unencrypted device, then trigger
* that action.
*/
action_for_each_trigger("nonencrypted", action_add_queue_tail);
} else if (ret == FS_MGR_MNTALL_DEV_NEEDS_RECOVERY) {
/* Setup a wipe via recovery, and reboot into recovery */
ERROR("fs_mgr_mount_all suggested recovery, so wiping data via recovery.\n");
ret = wipe_data_via_recovery();
/* If reboot worked, there is no return. */
} else if (ret > 0) {
ERROR("fs_mgr_mount_all returned unexpected error %d\n", ret);
}
/* else ... < 0: error */
return ret;
}