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/*
* 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 <linux/kdev_t.h>
#include <linux/fs.h>
#define LOG_TAG "Vold"
#include <cutils/log.h>
#include <cutils/properties.h>
#include "Ext4.h"
static char E2FSCK_PATH[] = "/system/bin/e2fsck";
static char MKEXT4FS_PATH[] = "/system/bin/make_ext4fs";
extern "C" int logwrap(int argc, const char **argv, int background);
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::check(const char *fsPath) {
bool rw = true;
if (access(E2FSCK_PATH, X_OK)) {
SLOGW("Skipping fs checks.\n");
return 0;
}
int rc = -1;
do {
const char *args[5];
args[0] = E2FSCK_PATH;
args[1] = "-p";
args[2] = "-f";
args[3] = fsPath;
args[4] = NULL;
rc = logwrap(4, args, 1);
switch(rc) {
case 0:
SLOGI("EXT4 Filesystem check completed OK.\n");
return 0;
case 1:
SLOGI("EXT4 Filesystem check completed, errors corrected OK.\n");
return 0;
case 2:
SLOGE("EXT4 Filesystem check completed, errors corrected, need reboot.\n");
return 0;
case 4:
SLOGE("EXT4 Filesystem errors left uncorrected.\n");
return 0;
case 8:
SLOGE("E2FSCK Operational error.\n");
errno = EIO;
return -1;
default:
SLOGE("EXT4 Filesystem check failed (unknown exit code %d).\n", rc);
errno = EIO;
return -1;
}
} while (0);
return 0;
}
int Ext4::format(const char *fsPath) {
int fd;
const char *args[4];
int rc;
args[0] = MKEXT4FS_PATH;
args[1] = "-J";
args[2] = fsPath;
args[3] = NULL;
rc = logwrap(3, args, 1);
if (rc == 0) {
SLOGI("Filesystem (ext4) formatted OK");
return 0;
} else {
SLOGE("Format (ext4) failed (unknown exit code %d)", rc);
errno = EIO;
return -1;
}
return 0;
}
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