The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright (C) 2008 The Android Open Source Project |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <fcntl.h> |
| 19 | #include <errno.h> |
| 20 | |
| 21 | #include <sys/types.h> |
| 22 | #include <sys/stat.h> |
| 23 | #include <sys/mount.h> |
| 24 | |
| 25 | #include <linux/ext2_fs.h> |
| 26 | #include <linux/ext3_fs.h> |
| 27 | |
| 28 | #include "vold.h" |
| 29 | #include "volmgr.h" |
| 30 | #include "volmgr_ext3.h" |
| 31 | #include "logwrapper.h" |
| 32 | |
| 33 | |
| 34 | #define EXT_DEBUG 0 |
| 35 | |
| 36 | static char E2FSCK_PATH[] = "/system/bin/e2fsck"; |
| 37 | |
| 38 | int ext_identify(blkdev_t *dev) |
| 39 | { |
| 40 | int rc = -1; |
| 41 | int fd; |
| 42 | struct ext3_super_block sb; |
| 43 | char *devpath; |
| 44 | |
| 45 | #if EXT_DEBUG |
| 46 | LOG_VOL("ext_identify(%d:%d):", dev-major, dev->minor); |
| 47 | #endif |
| 48 | |
| 49 | devpath = blkdev_get_devpath(dev); |
| 50 | |
| 51 | if ((fd = open(devpath, O_RDWR)) < 0) { |
| 52 | LOGE("Unable to open device '%s' (%s)", devpath, |
| 53 | strerror(errno)); |
| 54 | free(devpath); |
| 55 | return -errno; |
| 56 | } |
| 57 | |
| 58 | if (lseek(fd, 1024, SEEK_SET) < 0) { |
| 59 | LOGE("Unable to lseek to get superblock (%s)", strerror(errno)); |
| 60 | rc = -errno; |
| 61 | goto out; |
| 62 | } |
| 63 | |
| 64 | if (read(fd, &sb, sizeof(sb)) != sizeof(sb)) { |
| 65 | LOGE("Unable to read superblock (%s)", strerror(errno)); |
| 66 | rc = -errno; |
| 67 | goto out; |
| 68 | } |
| 69 | |
| 70 | if (sb.s_magic == EXT2_SUPER_MAGIC || |
| 71 | sb.s_magic == EXT3_SUPER_MAGIC) |
| 72 | rc = 0; |
| 73 | else |
| 74 | rc = -ENODATA; |
| 75 | |
| 76 | out: |
| 77 | #if EXT_DEBUG |
| 78 | LOG_VOL("ext_identify(%s): rc = %d", devpath, rc); |
| 79 | #endif |
| 80 | free(devpath); |
| 81 | close(fd); |
| 82 | return rc; |
| 83 | } |
| 84 | |
| 85 | int ext_check(blkdev_t *dev) |
| 86 | { |
| 87 | char *devpath; |
| 88 | |
| 89 | #if EXT_DEBUG |
| 90 | LOG_VOL("ext_check(%s):", dev->dev_fspath); |
| 91 | #endif |
| 92 | |
| 93 | devpath = blkdev_get_devpath(dev); |
| 94 | |
| 95 | if (access(E2FSCK_PATH, X_OK)) { |
| 96 | LOGE("ext_check(%s): %s not found (skipping checks)", |
| 97 | devpath, E2FSCK_PATH); |
| 98 | free(devpath); |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | char *args[5]; |
| 103 | |
| 104 | args[0] = E2FSCK_PATH; |
| 105 | args[1] = "-v"; |
| 106 | args[2] = "-p"; |
| 107 | args[3] = devpath; |
| 108 | args[4] = NULL; |
| 109 | |
San Mehat | 825c27d | 2009-06-12 07:39:52 -0700 | [diff] [blame] | 110 | int rc = logwrap(4, args, 1); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 111 | |
| 112 | if (rc == 0) { |
| 113 | LOG_VOL("filesystem '%s' had no errors", devpath); |
| 114 | } else if (rc == 1) { |
| 115 | LOG_VOL("filesystem '%s' had corrected errors", devpath); |
| 116 | rc = 0; |
| 117 | } else if (rc == 2) { |
| 118 | LOGE("VOL volume '%s' had corrected errors (system should be rebooted)", devpath); |
| 119 | rc = -EIO; |
| 120 | } else if (rc == 4) { |
| 121 | LOGE("VOL volume '%s' had uncorrectable errors", devpath); |
| 122 | rc = -EIO; |
| 123 | } else if (rc == 8) { |
| 124 | LOGE("Operational error while checking volume '%s'", devpath); |
| 125 | rc = -EIO; |
| 126 | } else { |
| 127 | LOGE("Unknown e2fsck exit code (%d)", rc); |
| 128 | rc = -EIO; |
| 129 | } |
| 130 | free(devpath); |
| 131 | return rc; |
| 132 | } |
| 133 | |
| 134 | int ext_mount(blkdev_t *dev, volume_t *vol, boolean safe_mode) |
| 135 | { |
| 136 | #if EXT_DEBUG |
| 137 | LOG_VOL("ext_mount(%s, %s, %d):", dev->dev_fspath, vol->mount_point, safe_mode); |
| 138 | #endif |
| 139 | |
| 140 | char *fs[] = { "ext3", "ext2", NULL }; |
| 141 | char *devpath; |
| 142 | |
| 143 | devpath = blkdev_get_devpath(dev); |
| 144 | |
| 145 | int flags, rc = 0; |
| 146 | |
| 147 | flags = MS_NODEV | MS_NOEXEC | MS_NOSUID | MS_NOATIME | MS_NODIRATIME; |
| 148 | |
| 149 | if (safe_mode) |
| 150 | flags |= MS_SYNCHRONOUS; |
| 151 | |
| 152 | if (vol->state == volstate_mounted) { |
| 153 | LOG_VOL("Remounting %s on %s, safe mode %d", devpath, |
| 154 | vol->mount_point, safe_mode); |
| 155 | flags |= MS_REMOUNT; |
| 156 | } |
| 157 | |
| 158 | char **f; |
| 159 | for (f = fs; *f != NULL; f++) { |
| 160 | rc = mount(devpath, vol->mount_point, *f, flags, NULL); |
| 161 | if (rc && errno == EROFS) { |
| 162 | LOGE("ext_mount(%s, %s): Read only filesystem - retrying mount RO", |
| 163 | devpath, vol->mount_point); |
| 164 | flags |= MS_RDONLY; |
| 165 | rc = mount(devpath, vol->mount_point, *f, flags, NULL); |
| 166 | } |
| 167 | #if EXT_DEBUG |
| 168 | LOG_VOL("ext_mount(%s, %s): %s mount rc = %d", devpath, *f, |
| 169 | vol->mount_point, rc); |
| 170 | #endif |
| 171 | if (!rc) |
| 172 | break; |
| 173 | } |
| 174 | free(devpath); |
| 175 | |
| 176 | // Chmod the mount point so that its a free-for-all. |
| 177 | // (required for consistency with VFAT.. sigh) |
| 178 | if (chmod(vol->mount_point, 0777) < 0) { |
| 179 | LOGE("Failed to chmod %s (%s)", vol->mount_point, strerror(errno)); |
| 180 | return -errno; |
| 181 | } |
| 182 | |
| 183 | return rc; |
| 184 | } |