Ext4.cpp revision fcd34a0ddd45db83b7bc71ff47cba9b789089fdd
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 36344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#define LOG_TAG "Vold" 37344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 38344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <cutils/log.h> 39344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <cutils/properties.h> 40344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 412ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand#include <logwrap/logwrap.h> 422ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand 43344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include "Ext4.h" 445593c856f49684f149116a6f2f28ddf9338b8557Rom Lemarchand#include "VoldUtil.h" 45344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 46fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg#define MKEXT4FS_PATH "/system/bin/make_ext4fs" 47fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg#define RESIZE2FS_PATH "/system/bin/resize2fs" 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 71fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenbergint Ext4::resize(const char *fspath, unsigned int numSectors) { 72fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg const char *args[4]; 73fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg char* size_str; 74fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg int rc; 75fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg int status; 76fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 77fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg args[0] = RESIZE2FS_PATH; 78fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg args[1] = "-f"; 79fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg args[2] = fspath; 80fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg if (asprintf(&size_str, "%ds", numSectors) < 0) 81fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg { 82fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Filesystem (ext4) resize failed to set size"); 83fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 84fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 85fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg args[3] = size_str; 86fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false, 87fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg true); 88fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg free(size_str); 89fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg if (rc != 0) { 90fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Filesystem (ext4) resize failed due to logwrap error"); 91fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg errno = EIO; 92fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 93fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 94fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 95fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg if (!WIFEXITED(status)) { 96fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Filesystem (ext4) resize did not exit properly"); 97fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg errno = EIO; 98fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 99fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 100fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 101fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg status = WEXITSTATUS(status); 102fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 103fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg if (status == 0) { 104fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGI("Filesystem (ext4) resized OK"); 105fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return 0; 106fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } else { 107fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Resize (ext4) failed (unknown exit code %d)", status); 108fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg errno = EIO; 109fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 110fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 111fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return 0; 112fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg} 113fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 1146a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenbergint Ext4::format(const char *fsPath, unsigned int numSectors, const char *mountpoint) { 115344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root int fd; 1166a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg const char *args[7]; 117344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root int rc; 1182ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand int status; 119344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 120344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root args[0] = MKEXT4FS_PATH; 121344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root args[1] = "-J"; 122a54e13a3dca8ad15141a9f1084b6e121caeddce5rpcraig args[2] = "-a"; 123a54e13a3dca8ad15141a9f1084b6e121caeddce5rpcraig args[3] = mountpoint; 1246a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg if (numSectors) { 1256a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg char tmp[32]; 1266a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg snprintf(tmp, sizeof(tmp), "%u", numSectors * 512); 1276a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg const char *size = tmp; 1286a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg args[4] = "-l"; 1296a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg args[5] = size; 1306a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg args[6] = fsPath; 1316a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false, true); 1326a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg } else { 1336a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg args[4] = fsPath; 1346a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg rc = android_fork_execvp(5, (char **)args, &status, false, true); 1356a74dcaa6e646fea8e00b7c04332fc60fe7e017cDaniel Rosenberg } 1362ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false, 1372ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand true); 1382ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand if (rc != 0) { 1392ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand SLOGE("Filesystem (ext4) format failed due to logwrap error"); 1402ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand errno = EIO; 1412ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand return -1; 1422ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand } 1432ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand 1442ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand if (!WIFEXITED(status)) { 1452ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand SLOGE("Filesystem (ext4) format did not exit properly"); 1462ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand errno = EIO; 1472ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand return -1; 1482ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand } 1492ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand 1502ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand status = WEXITSTATUS(status); 151344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 1522ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand if (status == 0) { 153344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGI("Filesystem (ext4) formatted OK"); 154344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return 0; 155344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } else { 1562ba45aafc22ff2fed91f8cd191beb85578b7b9bcRom Lemarchand SLOGE("Format (ext4) failed (unknown exit code %d)", status); 157344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root errno = EIO; 158344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 159344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 160344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return 0; 161344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root} 162