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/*
* Copyright (C) 2012 The Android Open Source Project
* Copyright (C) 2013 The CyanogenMod 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 "Exfat.h"
static char EXFAT_FSCK[] = "/system/bin/fsck.exfat";
static char EXFAT_MKFS[] = "/system/bin/mkfs.exfat";
static char EXFAT_MOUNT[] = "/system/bin/mount.exfat";
extern "C" int logwrap(int argc, const char **argv, int background);
int Exfat::doMount(const char *fsPath, const char *mountPoint,
bool ro, bool remount, bool executable,
int ownerUid, int ownerGid, int permMask) {
int rc = -1;
char mountData[255];
const char *args[6];
if (access(EXFAT_MOUNT, X_OK)) {
SLOGE("Unable to mount, exFAT FUSE helper not found!");
return rc;
}
sprintf(mountData,
"noatime,nodev,nosuid,dirsync,uid=%d,gid=%d,fmask=%o,dmask=%o,%s,%s",
ownerUid, ownerGid, permMask, permMask,
(executable ? "exec" : "noexec"),
(ro ? "ro" : "rw"));
args[0] = EXFAT_MOUNT;
args[1] = "-o";
args[2] = mountData;
args[3] = fsPath;
args[4] = mountPoint;
args[5] = NULL;
SLOGW("Executing exFAT mount (%s) -> (%s)", fsPath, mountPoint);
rc = logwrap(5, args, 1);
if (rc && errno == EROFS) {
SLOGE("%s appears to be a read only filesystem - retrying mount RO", fsPath);
strcat(mountData, ",ro");
rc = logwrap(5, args, 1);
}
return rc;
}
int Exfat::check(const char *fsPath) {
bool rw = true;
int rc = -1;
if (access(EXFAT_FSCK, X_OK)) {
SLOGW("Skipping fs checks, exfatfsck not found.\n");
return 0;
}
do {
const char *args[3];
args[0] = EXFAT_FSCK;
args[1] = fsPath;
args[2] = NULL;
rc = logwrap(3, args, 1);
switch(rc) {
case 0:
SLOGI("exFAT filesystem check completed OK.\n");
return 0;
case 1:
SLOGI("exFAT filesystem check completed, errors corrected OK.\n");
return 0;
case 2:
SLOGE("exFAT filesystem check completed, errors corrected, need reboot.\n");
return 0;
case 4:
SLOGE("exFAT filesystem errors left uncorrected.\n");
return 0;
case 8:
SLOGE("exfatfsck operational error.\n");
errno = EIO;
return -1;
default:
SLOGE("exFAT filesystem check failed (unknown exit code %d).\n", rc);
errno = EIO;
return -1;
}
} while (0);
return 0;
}
int Exfat::format(const char *fsPath) {
int fd;
const char *args[3];
int rc = -1;
if (access(EXFAT_MKFS, X_OK)) {
SLOGE("Unable to format, mkexfatfs not found.");
return -1;
}
args[0] = EXFAT_MKFS;
args[1] = fsPath;
args[2] = NULL;
rc = logwrap(3, args, 1);
if (rc == 0) {
SLOGI("Filesystem (exFAT) formatted OK");
return 0;
} else {
SLOGE("Format (exFAT) failed (unknown exit code %d)", rc);
errno = EIO;
return -1;
}
return 0;
}
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