blob: dc31fd0e6ac0f5279e20bc6222e2883b4a1a2192 [file] [log] [blame]
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/wait.h>
#include <linux/kdev_t.h>
#define LOG_TAG "Vold"
#include <cutils/log.h>
#include <cutils/properties.h>
#include <logwrap/logwrap.h>
#include "Ext4.h"
#include "VoldUtil.h"
#define MKEXT4FS_PATH "/system/bin/make_ext4fs"
#define RESIZE2FS_PATH "/system/bin/resize2fs"
int Ext4::doMount(const char *fsPath, const char *mountPoint, bool ro, bool remount,
bool executable) {
int rc;
unsigned long flags;
flags = MS_NOATIME | MS_NODEV | MS_NOSUID | MS_DIRSYNC;
flags |= (executable ? 0 : MS_NOEXEC);
flags |= (ro ? MS_RDONLY : 0);
flags |= (remount ? MS_REMOUNT : 0);
rc = mount(fsPath, mountPoint, "ext4", flags, NULL);
if (rc && errno == EROFS) {
SLOGE("%s appears to be a read only filesystem - retrying mount RO", fsPath);
flags |= MS_RDONLY;
rc = mount(fsPath, mountPoint, "ext4", flags, NULL);
}
return rc;
}
int Ext4::resize(const char *fspath, unsigned int numSectors) {
const char *args[4];
char* size_str;
int rc;
int status;
args[0] = RESIZE2FS_PATH;
args[1] = "-f";
args[2] = fspath;
if (asprintf(&size_str, "%ds", numSectors) < 0)
{
SLOGE("Filesystem (ext4) resize failed to set size");
return -1;
}
args[3] = size_str;
rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false,
true);
free(size_str);
if (rc != 0) {
SLOGE("Filesystem (ext4) resize failed due to logwrap error");
errno = EIO;
return -1;
}
if (!WIFEXITED(status)) {
SLOGE("Filesystem (ext4) resize did not exit properly");
errno = EIO;
return -1;
}
status = WEXITSTATUS(status);
if (status == 0) {
SLOGI("Filesystem (ext4) resized OK");
return 0;
} else {
SLOGE("Resize (ext4) failed (unknown exit code %d)", status);
errno = EIO;
return -1;
}
return 0;
}
int Ext4::format(const char *fsPath, unsigned int numSectors, const char *mountpoint) {
int fd;
const char *args[7];
int rc;
int status;
args[0] = MKEXT4FS_PATH;
args[1] = "-J";
args[2] = "-a";
args[3] = mountpoint;
if (numSectors) {
char tmp[32];
snprintf(tmp, sizeof(tmp), "%u", numSectors * 512);
const char *size = tmp;
args[4] = "-l";
args[5] = size;
args[6] = fsPath;
rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false, true);
} else {
args[4] = fsPath;
rc = android_fork_execvp(5, (char **)args, &status, false, true);
}
rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false,
true);
if (rc != 0) {
SLOGE("Filesystem (ext4) format failed due to logwrap error");
errno = EIO;
return -1;
}
if (!WIFEXITED(status)) {
SLOGE("Filesystem (ext4) format did not exit properly");
errno = EIO;
return -1;
}
status = WEXITSTATUS(status);
if (status == 0) {
SLOGI("Filesystem (ext4) formatted OK");
return 0;
} else {
SLOGE("Format (ext4) failed (unknown exit code %d)", status);
errno = EIO;
return -1;
}
return 0;
}