Ext4.cpp revision 2ba45aafc22ff2fed91f8cd191beb85578b7b9bc
1344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root/* 2344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * Copyright (C) 2012 The Android Open Source Project 3344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * 4344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * Licensed under the Apache License, Version 2.0 (the "License"); 5344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * you may not use this file except in compliance with the License. 6344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * You may obtain a copy of the License at 7344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * 8344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * http://www.apache.org/licenses/LICENSE-2.0 9344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * 10344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * Unless required by applicable law or agreed to in writing, software 11344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * distributed under the License is distributed on an "AS IS" BASIS, 12344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * See the License for the specific language governing permissions and 14344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * limitations under the License. 15344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root */ 16344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 17344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <stdio.h> 18344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <stdlib.h> 19344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <fcntl.h> 20344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <unistd.h> 21344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <errno.h> 22344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <string.h> 23344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <dirent.h> 24344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <errno.h> 25344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <fcntl.h> 26344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 27344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <sys/types.h> 28344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <sys/stat.h> 29344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <sys/types.h> 30344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <sys/mman.h> 31344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <sys/mount.h> 322ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand#include <sys/wait.h> 33344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 34344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <linux/kdev_t.h> 35344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <linux/fs.h> 36344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 37344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#define LOG_TAG "Vold" 38344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 39344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <cutils/log.h> 40344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <cutils/properties.h> 41344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 422ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand#include <logwrap/logwrap.h> 432ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand 44344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include "Ext4.h" 455593c856f49684f149116a6f2f28ddf9338b8557Rom Lemarchand#include "VoldUtil.h" 46344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 47344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#define MKEXT4FS_PATH "/system/bin/make_ext4fs"; 48344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 49344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Rootint Ext4::doMount(const char *fsPath, const char *mountPoint, bool ro, bool remount, 50344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root bool executable) { 51344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root int rc; 52344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root unsigned long flags; 53344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 54344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root flags = MS_NOATIME | MS_NODEV | MS_NOSUID | MS_DIRSYNC; 55344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 56344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root flags |= (executable ? 0 : MS_NOEXEC); 57344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root flags |= (ro ? MS_RDONLY : 0); 58344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root flags |= (remount ? MS_REMOUNT : 0); 59344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 60344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root rc = mount(fsPath, mountPoint, "ext4", flags, NULL); 61344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 62344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root if (rc && errno == EROFS) { 63344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGE("%s appears to be a read only filesystem - retrying mount RO", fsPath); 64344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root flags |= MS_RDONLY; 65344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root rc = mount(fsPath, mountPoint, "ext4", flags, NULL); 66344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 67344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 68344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return rc; 69344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root} 70344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 71a54e13a3dca8ad15141a9f1084b6e121caeddce5rpcraigint Ext4::format(const char *fsPath, const char *mountpoint) { 72344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root int fd; 735593c856f49684f149116a6f2f28ddf9338b8557Rom Lemarchand const char *args[5]; 74344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root int rc; 752ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand int status; 76344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 77344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root args[0] = MKEXT4FS_PATH; 78344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root args[1] = "-J"; 79a54e13a3dca8ad15141a9f1084b6e121caeddce5rpcraig args[2] = "-a"; 80a54e13a3dca8ad15141a9f1084b6e121caeddce5rpcraig args[3] = mountpoint; 81a54e13a3dca8ad15141a9f1084b6e121caeddce5rpcraig args[4] = fsPath; 822ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false, 832ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand true); 842ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand if (rc != 0) { 852ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand SLOGE("Filesystem (ext4) format failed due to logwrap error"); 862ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand errno = EIO; 872ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand return -1; 882ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand } 892ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand 902ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand if (!WIFEXITED(status)) { 912ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand SLOGE("Filesystem (ext4) format did not exit properly"); 922ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand errno = EIO; 932ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand return -1; 942ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand } 952ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand 962ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand status = WEXITSTATUS(status); 97344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 982ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand if (status == 0) { 99344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGI("Filesystem (ext4) formatted OK"); 100344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return 0; 101344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } else { 1022ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand SLOGE("Format (ext4) failed (unknown exit code %d)", status); 103344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root errno = EIO; 104344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 105344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 106344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return 0; 107344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root} 108