diff options
Diffstat (limited to 'Ext4.cpp')
-rw-r--r-- | Ext4.cpp | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/Ext4.cpp b/Ext4.cpp new file mode 100644 index 0000000..290489e --- /dev/null +++ b/Ext4.cpp @@ -0,0 +1,90 @@ +/* + * 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" + +#define 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::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; +} |