Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "Checkpoint" |
| 18 | #include "Checkpoint.h" |
Daniel Rosenberg | 253b44e | 2019-02-01 19:25:47 -0800 | [diff] [blame] | 19 | #include "VoldUtil.h" |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 20 | |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 21 | #include <fstream> |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 22 | #include <list> |
Paul Lawrence | 2040089 | 2018-10-03 14:14:52 -0700 | [diff] [blame] | 23 | #include <memory> |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 24 | #include <string> |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 25 | #include <vector> |
| 26 | |
| 27 | #include <android-base/file.h> |
| 28 | #include <android-base/logging.h> |
| 29 | #include <android-base/parseint.h> |
Daniel Rosenberg | ffa1bb0 | 2018-12-14 00:20:03 -0800 | [diff] [blame] | 30 | #include <android-base/properties.h> |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 31 | #include <android-base/unique_fd.h> |
Daniel Rosenberg | d399249 | 2018-10-02 17:40:44 -0700 | [diff] [blame] | 32 | #include <android/hardware/boot/1.0/IBootControl.h> |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 33 | #include <cutils/android_reboot.h> |
| 34 | #include <fcntl.h> |
| 35 | #include <fs_mgr.h> |
| 36 | #include <linux/fs.h> |
| 37 | #include <mntent.h> |
| 38 | #include <sys/mount.h> |
| 39 | #include <sys/stat.h> |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 40 | |
Daniel Rosenberg | ffa1bb0 | 2018-12-14 00:20:03 -0800 | [diff] [blame] | 41 | using android::base::SetProperty; |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 42 | using android::binder::Status; |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 43 | using android::fs_mgr::Fstab; |
| 44 | using android::fs_mgr::ReadDefaultFstab; |
| 45 | using android::fs_mgr::ReadFstabFromFile; |
Daniel Rosenberg | d399249 | 2018-10-02 17:40:44 -0700 | [diff] [blame] | 46 | using android::hardware::hidl_string; |
| 47 | using android::hardware::boot::V1_0::BoolResult; |
Daniel Rosenberg | 886915b | 2019-01-23 15:16:04 -0800 | [diff] [blame] | 48 | using android::hardware::boot::V1_0::CommandResult; |
Daniel Rosenberg | d399249 | 2018-10-02 17:40:44 -0700 | [diff] [blame] | 49 | using android::hardware::boot::V1_0::IBootControl; |
| 50 | using android::hardware::boot::V1_0::Slot; |
| 51 | |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 52 | namespace android { |
| 53 | namespace vold { |
| 54 | |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 55 | namespace { |
| 56 | const std::string kMetadataCPFile = "/metadata/vold/checkpoint"; |
| 57 | |
| 58 | bool setBowState(std::string const& block_device, std::string const& state) { |
| 59 | if (block_device.substr(0, 5) != "/dev/") { |
| 60 | LOG(ERROR) << "Expected block device, got " << block_device; |
| 61 | return false; |
| 62 | } |
| 63 | |
| 64 | std::string state_filename = std::string("/sys/") + block_device.substr(5) + "/bow/state"; |
| 65 | if (!android::base::WriteStringToFile(state, state_filename)) { |
| 66 | PLOG(ERROR) << "Failed to write to file " << state_filename; |
| 67 | return false; |
| 68 | } |
| 69 | |
| 70 | return true; |
| 71 | } |
| 72 | |
| 73 | } // namespace |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 74 | |
Daniel Rosenberg | 9b667fb | 2019-01-22 17:27:25 -0800 | [diff] [blame] | 75 | Status cp_supportsCheckpoint(bool& result) { |
| 76 | result = false; |
Daniel Rosenberg | 9b667fb | 2019-01-22 17:27:25 -0800 | [diff] [blame] | 77 | |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 78 | for (const auto& entry : fstab_default) { |
| 79 | if (entry.fs_mgr_flags.checkpoint_blk || entry.fs_mgr_flags.checkpoint_fs) { |
Daniel Rosenberg | 9b667fb | 2019-01-22 17:27:25 -0800 | [diff] [blame] | 80 | result = true; |
| 81 | return Status::ok(); |
| 82 | } |
| 83 | } |
| 84 | return Status::ok(); |
| 85 | } |
| 86 | |
Paul Lawrence | c5c79c5 | 2019-03-18 13:36:40 -0700 | [diff] [blame] | 87 | Status cp_supportsBlockCheckpoint(bool& result) { |
| 88 | result = false; |
| 89 | |
| 90 | for (const auto& entry : fstab_default) { |
| 91 | if (entry.fs_mgr_flags.checkpoint_blk) { |
| 92 | result = true; |
| 93 | return Status::ok(); |
| 94 | } |
| 95 | } |
| 96 | return Status::ok(); |
| 97 | } |
| 98 | |
| 99 | Status cp_supportsFileCheckpoint(bool& result) { |
| 100 | result = false; |
| 101 | |
| 102 | for (const auto& entry : fstab_default) { |
| 103 | if (entry.fs_mgr_flags.checkpoint_fs) { |
| 104 | result = true; |
| 105 | return Status::ok(); |
| 106 | } |
| 107 | } |
| 108 | return Status::ok(); |
| 109 | } |
| 110 | |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 111 | Status cp_startCheckpoint(int retry) { |
| 112 | if (retry < -1) return Status::fromExceptionCode(EINVAL, "Retry count must be more than -1"); |
Daniel Rosenberg | 80d1ca5 | 2018-10-09 19:26:57 -0700 | [diff] [blame] | 113 | std::string content = std::to_string(retry + 1); |
Daniel Rosenberg | d399249 | 2018-10-02 17:40:44 -0700 | [diff] [blame] | 114 | if (retry == -1) { |
| 115 | sp<IBootControl> module = IBootControl::getService(); |
| 116 | if (module) { |
| 117 | std::string suffix; |
| 118 | auto cb = [&suffix](hidl_string s) { suffix = s; }; |
| 119 | if (module->getSuffix(module->getCurrentSlot(), cb).isOk()) content += " " + suffix; |
| 120 | } |
| 121 | } |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 122 | if (!android::base::WriteStringToFile(content, kMetadataCPFile)) |
| 123 | return Status::fromExceptionCode(errno, "Failed to write checkpoint file"); |
| 124 | return Status::ok(); |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 125 | } |
| 126 | |
Daniel Rosenberg | ffa1bb0 | 2018-12-14 00:20:03 -0800 | [diff] [blame] | 127 | namespace { |
| 128 | |
| 129 | bool isCheckpointing = false; |
| 130 | } |
| 131 | |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 132 | Status cp_commitChanges() { |
Daniel Rosenberg | ffa1bb0 | 2018-12-14 00:20:03 -0800 | [diff] [blame] | 133 | if (!isCheckpointing) { |
| 134 | return Status::ok(); |
| 135 | } |
Daniel Rosenberg | 886915b | 2019-01-23 15:16:04 -0800 | [diff] [blame] | 136 | sp<IBootControl> module = IBootControl::getService(); |
| 137 | if (module) { |
| 138 | CommandResult cr; |
| 139 | module->markBootSuccessful([&cr](CommandResult result) { cr = result; }); |
| 140 | if (!cr.success) { |
| 141 | std::string msg = "Error marking booted successfully: " + std::string(cr.errMsg); |
| 142 | return Status::fromExceptionCode(EINVAL, String8(msg.c_str())); |
| 143 | } |
| 144 | LOG(INFO) << "Marked slot as booted successfully."; |
| 145 | } |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 146 | // Must take action for list of mounted checkpointed things here |
| 147 | // To do this, we walk the list of mounted file systems. |
| 148 | // But we also need to get the matching fstab entries to see |
| 149 | // the original flags |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 150 | std::string err_str; |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 151 | |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 152 | Fstab mounts; |
| 153 | if (!ReadFstabFromFile("/proc/mounts", &mounts)) { |
| 154 | return Status::fromExceptionCode(EINVAL, "Failed to get /proc/mounts"); |
| 155 | } |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 156 | |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 157 | // Walk mounted file systems |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 158 | for (const auto& mount_rec : mounts) { |
| 159 | const auto fstab_rec = GetEntryForMountPoint(&fstab_default, mount_rec.mount_point); |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 160 | if (!fstab_rec) continue; |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 161 | |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 162 | if (fstab_rec->fs_mgr_flags.checkpoint_fs) { |
| 163 | if (fstab_rec->fs_type == "f2fs") { |
| 164 | std::string options = mount_rec.fs_options + ",checkpoint=enable"; |
| 165 | if (mount(mount_rec.blk_device.c_str(), mount_rec.mount_point.c_str(), "none", |
Daniel Rosenberg | 14ca4ac | 2019-01-24 18:23:18 -0800 | [diff] [blame] | 166 | MS_REMOUNT | fstab_rec->flags, options.c_str())) { |
Daniel Rosenberg | 4b86df1 | 2018-11-08 22:18:37 -0800 | [diff] [blame] | 167 | return Status::fromExceptionCode(EINVAL, "Failed to remount"); |
| 168 | } |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 169 | } |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 170 | } else if (fstab_rec->fs_mgr_flags.checkpoint_blk) { |
| 171 | if (!setBowState(mount_rec.blk_device, "2")) |
Daniel Rosenberg | 4b86df1 | 2018-11-08 22:18:37 -0800 | [diff] [blame] | 172 | return Status::fromExceptionCode(EINVAL, "Failed to set bow state"); |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 173 | } |
| 174 | } |
Daniel Rosenberg | ffa1bb0 | 2018-12-14 00:20:03 -0800 | [diff] [blame] | 175 | SetProperty("vold.checkpoint_committed", "1"); |
Daniel Rosenberg | 886915b | 2019-01-23 15:16:04 -0800 | [diff] [blame] | 176 | LOG(INFO) << "Checkpoint has been committed."; |
Daniel Rosenberg | ffa1bb0 | 2018-12-14 00:20:03 -0800 | [diff] [blame] | 177 | isCheckpointing = false; |
Daniel Rosenberg | 4b86df1 | 2018-11-08 22:18:37 -0800 | [diff] [blame] | 178 | if (!android::base::RemoveFileIfExists(kMetadataCPFile, &err_str)) |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 179 | return Status::fromExceptionCode(errno, err_str.c_str()); |
| 180 | return Status::ok(); |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 181 | } |
| 182 | |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 183 | Status cp_abortChanges() { |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 184 | android_reboot(ANDROID_RB_RESTART2, 0, nullptr); |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 185 | return Status::ok(); |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Daniel Rosenberg | d399249 | 2018-10-02 17:40:44 -0700 | [diff] [blame] | 188 | bool cp_needsRollback() { |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 189 | std::string content; |
| 190 | bool ret; |
| 191 | |
| 192 | ret = android::base::ReadFileToString(kMetadataCPFile, &content); |
Daniel Rosenberg | d399249 | 2018-10-02 17:40:44 -0700 | [diff] [blame] | 193 | if (ret) { |
| 194 | if (content == "0") return true; |
| 195 | if (content.substr(0, 3) == "-1 ") { |
| 196 | std::string oldSuffix = content.substr(3); |
| 197 | sp<IBootControl> module = IBootControl::getService(); |
| 198 | std::string newSuffix; |
| 199 | |
| 200 | if (module) { |
| 201 | auto cb = [&newSuffix](hidl_string s) { newSuffix = s; }; |
| 202 | module->getSuffix(module->getCurrentSlot(), cb); |
| 203 | if (oldSuffix == newSuffix) return true; |
| 204 | } |
| 205 | } |
| 206 | } |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 207 | return false; |
| 208 | } |
| 209 | |
Daniel Rosenberg | 80d1ca5 | 2018-10-09 19:26:57 -0700 | [diff] [blame] | 210 | bool cp_needsCheckpoint() { |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 211 | bool ret; |
| 212 | std::string content; |
Daniel Rosenberg | d399249 | 2018-10-02 17:40:44 -0700 | [diff] [blame] | 213 | sp<IBootControl> module = IBootControl::getService(); |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 214 | |
Daniel Rosenberg | ffa1bb0 | 2018-12-14 00:20:03 -0800 | [diff] [blame] | 215 | if (module && module->isSlotMarkedSuccessful(module->getCurrentSlot()) == BoolResult::FALSE) { |
| 216 | isCheckpointing = true; |
Daniel Rosenberg | d399249 | 2018-10-02 17:40:44 -0700 | [diff] [blame] | 217 | return true; |
Daniel Rosenberg | ffa1bb0 | 2018-12-14 00:20:03 -0800 | [diff] [blame] | 218 | } |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 219 | ret = android::base::ReadFileToString(kMetadataCPFile, &content); |
Daniel Rosenberg | ffa1bb0 | 2018-12-14 00:20:03 -0800 | [diff] [blame] | 220 | if (ret) { |
| 221 | ret = content != "0"; |
| 222 | isCheckpointing = ret; |
| 223 | return ret; |
| 224 | } |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 225 | return false; |
| 226 | } |
| 227 | |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 228 | Status cp_prepareCheckpoint() { |
Paul Lawrence | db08694 | 2019-02-19 14:18:54 -0800 | [diff] [blame] | 229 | if (!isCheckpointing) { |
| 230 | return Status::ok(); |
| 231 | } |
| 232 | |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 233 | Fstab mounts; |
| 234 | if (!ReadFstabFromFile("/proc/mounts", &mounts)) { |
| 235 | return Status::fromExceptionCode(EINVAL, "Failed to get /proc/mounts"); |
| 236 | } |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 237 | |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 238 | for (const auto& mount_rec : mounts) { |
| 239 | const auto fstab_rec = GetEntryForMountPoint(&fstab_default, mount_rec.mount_point); |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 240 | if (!fstab_rec) continue; |
| 241 | |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 242 | if (fstab_rec->fs_mgr_flags.checkpoint_blk) { |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 243 | android::base::unique_fd fd( |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 244 | TEMP_FAILURE_RETRY(open(mount_rec.mount_point.c_str(), O_RDONLY | O_CLOEXEC))); |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 245 | if (!fd) { |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 246 | PLOG(ERROR) << "Failed to open mount point" << mount_rec.mount_point; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 247 | continue; |
| 248 | } |
| 249 | |
| 250 | struct fstrim_range range = {}; |
| 251 | range.len = ULLONG_MAX; |
| 252 | if (ioctl(fd, FITRIM, &range)) { |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 253 | PLOG(ERROR) << "Failed to trim " << mount_rec.mount_point; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 254 | continue; |
| 255 | } |
| 256 | |
Tom Cherry | 4c5bde2 | 2019-01-29 14:34:01 -0800 | [diff] [blame] | 257 | setBowState(mount_rec.blk_device, "1"); |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 258 | } |
| 259 | } |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 260 | return Status::ok(); |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | namespace { |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 264 | const int kSectorSize = 512; |
| 265 | |
| 266 | typedef uint64_t sector_t; |
| 267 | |
| 268 | struct log_entry { |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 269 | sector_t source; // in sectors of size kSectorSize |
| 270 | sector_t dest; // in sectors of size kSectorSize |
| 271 | uint32_t size; // in bytes |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 272 | uint32_t checksum; |
| 273 | } __attribute__((packed)); |
| 274 | |
Paul Lawrence | f507768 | 2019-01-18 10:28:34 -0800 | [diff] [blame] | 275 | struct log_sector_v1_0 { |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 276 | uint32_t magic; |
Paul Lawrence | f507768 | 2019-01-18 10:28:34 -0800 | [diff] [blame] | 277 | uint16_t header_version; |
| 278 | uint16_t header_size; |
Paul Lawrence | 4f13a90 | 2019-01-10 13:06:07 -0800 | [diff] [blame] | 279 | uint32_t block_size; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 280 | uint32_t count; |
| 281 | uint32_t sequence; |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 282 | uint64_t sector0; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 283 | } __attribute__((packed)); |
| 284 | |
| 285 | // MAGIC is BOW in ascii |
| 286 | const int kMagic = 0x00574f42; |
Daniel Rosenberg | 5298593 | 2019-03-01 22:01:22 -0800 | [diff] [blame] | 287 | // Partially restored MAGIC is WOB in ascii |
| 288 | const int kPartialRestoreMagic = 0x00424f57; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 289 | |
| 290 | void crc32(const void* data, size_t n_bytes, uint32_t* crc) { |
| 291 | static uint32_t table[0x100] = { |
| 292 | 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, |
| 293 | 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, |
| 294 | 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, |
| 295 | 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, |
| 296 | 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, |
| 297 | 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, |
| 298 | 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, |
| 299 | 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, |
| 300 | 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, |
| 301 | 0xB6662D3D, |
| 302 | |
| 303 | 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, |
| 304 | 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, |
| 305 | 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, |
| 306 | 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, |
| 307 | 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, |
| 308 | 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, |
| 309 | 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, |
| 310 | 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, |
| 311 | 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, |
| 312 | 0xC0BA6CAD, |
| 313 | |
| 314 | 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, |
| 315 | 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, |
| 316 | 0x0A00AE27, 0x7D079EB1, 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, |
| 317 | 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, |
| 318 | 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, |
| 319 | 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C, |
| 320 | 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, 0xCB61B38C, |
| 321 | 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, |
| 322 | 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, |
| 323 | 0x5BDEAE1D, |
| 324 | |
| 325 | 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, |
| 326 | 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, |
| 327 | 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, |
| 328 | 0xF6B9265B, 0x6FB077E1, 0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, |
| 329 | 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, |
| 330 | 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, |
| 331 | 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, |
| 332 | 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, |
| 333 | 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, |
| 334 | 0x2D02EF8D}; |
| 335 | |
| 336 | for (size_t i = 0; i < n_bytes; ++i) { |
| 337 | *crc ^= ((uint8_t*)data)[i]; |
| 338 | *crc = table[(uint8_t)*crc] ^ *crc >> 8; |
| 339 | } |
| 340 | } |
| 341 | |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 342 | // A map of relocations. |
| 343 | // The map must be initialized so that relocations[0] = 0 |
| 344 | // During restore, we replay the log records in reverse, copying from dest to |
| 345 | // source |
| 346 | // To validate, we must be able to read the 'dest' sectors as though they had |
| 347 | // been copied but without actually copying. This map represents how the sectors |
| 348 | // would have been moved. To read a sector s, find the index <= s and read |
| 349 | // relocations[index] + s - index |
| 350 | typedef std::map<sector_t, sector_t> Relocations; |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 351 | |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 352 | void relocate(Relocations& relocations, sector_t dest, sector_t source, int count) { |
| 353 | // Find first one we're equal to or greater than |
| 354 | auto s = --relocations.upper_bound(source); |
| 355 | |
| 356 | // Take slice |
| 357 | Relocations slice; |
| 358 | slice[dest] = source - s->first + s->second; |
| 359 | ++s; |
| 360 | |
| 361 | // Add rest of elements |
| 362 | for (; s != relocations.end() && s->first < source + count; ++s) |
| 363 | slice[dest - source + s->first] = s->second; |
| 364 | |
| 365 | // Split range at end of dest |
| 366 | auto dest_end = --relocations.upper_bound(dest + count); |
| 367 | relocations[dest + count] = dest + count - dest_end->first + dest_end->second; |
| 368 | |
| 369 | // Remove all elements in [dest, dest + count) |
| 370 | relocations.erase(relocations.lower_bound(dest), relocations.lower_bound(dest + count)); |
| 371 | |
| 372 | // Add new elements |
| 373 | relocations.insert(slice.begin(), slice.end()); |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 374 | } |
| 375 | |
Daniel Rosenberg | 5298593 | 2019-03-01 22:01:22 -0800 | [diff] [blame] | 376 | // A map of sectors that have been written to. |
| 377 | // The final entry must always be False. |
| 378 | // When we restart the restore after an interruption, we must take care that |
| 379 | // when we copy from dest to source, that the block we copy to was not |
| 380 | // previously copied from. |
| 381 | // i e. A->B C->A; If we replay this sequence, we end up copying C->B |
| 382 | // We must save our partial result whenever we finish a page, or when we copy |
| 383 | // to a location that was copied from earlier (our source is an earlier dest) |
| 384 | typedef std::map<sector_t, bool> Used_Sectors; |
| 385 | |
| 386 | bool checkCollision(Used_Sectors& used_sectors, sector_t start, sector_t end) { |
| 387 | auto second_overlap = used_sectors.upper_bound(start); |
| 388 | auto first_overlap = --second_overlap; |
| 389 | |
| 390 | if (first_overlap->second) { |
| 391 | return true; |
| 392 | } else if (second_overlap != used_sectors.end() && second_overlap->first < end) { |
| 393 | return true; |
| 394 | } |
| 395 | return false; |
| 396 | } |
| 397 | |
| 398 | void markUsed(Used_Sectors& used_sectors, sector_t start, sector_t end) { |
| 399 | auto start_pos = used_sectors.insert_or_assign(start, true).first; |
| 400 | auto end_pos = used_sectors.insert_or_assign(end, false).first; |
| 401 | |
| 402 | if (start_pos == used_sectors.begin() || !std::prev(start_pos)->second) { |
| 403 | start_pos++; |
| 404 | } |
| 405 | if (std::next(end_pos) != used_sectors.end() && !std::next(end_pos)->second) { |
| 406 | end_pos++; |
| 407 | } |
| 408 | if (start_pos->first < end_pos->first) { |
| 409 | used_sectors.erase(start_pos, end_pos); |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | // Restores the given log_entry's data from dest -> source |
| 414 | // If that entry is a log sector, set the magic to kPartialRestoreMagic and flush. |
| 415 | void restoreSector(int device_fd, Used_Sectors& used_sectors, std::vector<char>& ls_buffer, |
| 416 | log_entry* le, std::vector<char>& buffer) { |
| 417 | log_sector_v1_0& ls = *reinterpret_cast<log_sector_v1_0*>(&ls_buffer[0]); |
| 418 | uint32_t index = le - ((log_entry*)&ls_buffer[ls.header_size]); |
| 419 | int count = (le->size - 1) / kSectorSize + 1; |
| 420 | |
| 421 | if (checkCollision(used_sectors, le->source, le->source + count)) { |
| 422 | fsync(device_fd); |
| 423 | lseek64(device_fd, 0, SEEK_SET); |
| 424 | ls.count = index + 1; |
| 425 | ls.magic = kPartialRestoreMagic; |
| 426 | write(device_fd, &ls_buffer[0], ls.block_size); |
| 427 | fsync(device_fd); |
| 428 | used_sectors.clear(); |
| 429 | used_sectors[0] = false; |
| 430 | } |
| 431 | |
| 432 | markUsed(used_sectors, le->dest, le->dest + count); |
| 433 | |
| 434 | if (index == 0 && ls.sequence != 0) { |
| 435 | log_sector_v1_0* next = reinterpret_cast<log_sector_v1_0*>(&buffer[0]); |
| 436 | if (next->magic == kMagic) { |
| 437 | next->magic = kPartialRestoreMagic; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | lseek64(device_fd, le->source * kSectorSize, SEEK_SET); |
| 442 | write(device_fd, &buffer[0], le->size); |
| 443 | |
| 444 | if (index == 0) { |
| 445 | fsync(device_fd); |
| 446 | } |
| 447 | } |
| 448 | |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 449 | // Read from the device |
| 450 | // If we are validating, the read occurs as though the relocations had happened |
Daniel Rosenberg | 8271ae9 | 2019-03-04 21:46:31 -0800 | [diff] [blame] | 451 | std::vector<char> relocatedRead(int device_fd, Relocations const& relocations, bool validating, |
| 452 | sector_t sector, uint32_t size, uint32_t block_size) { |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 453 | if (!validating) { |
| 454 | std::vector<char> buffer(size); |
Daniel Rosenberg | 8271ae9 | 2019-03-04 21:46:31 -0800 | [diff] [blame] | 455 | lseek64(device_fd, sector * kSectorSize, SEEK_SET); |
| 456 | read(device_fd, &buffer[0], size); |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 457 | return buffer; |
| 458 | } |
| 459 | |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 460 | std::vector<char> buffer(size); |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 461 | for (uint32_t i = 0; i < size; i += block_size, sector += block_size / kSectorSize) { |
| 462 | auto relocation = --relocations.upper_bound(sector); |
Daniel Rosenberg | 8271ae9 | 2019-03-04 21:46:31 -0800 | [diff] [blame] | 463 | lseek64(device_fd, (sector + relocation->second - relocation->first) * kSectorSize, |
| 464 | SEEK_SET); |
| 465 | read(device_fd, &buffer[i], block_size); |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 466 | } |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 467 | |
| 468 | return buffer; |
| 469 | } |
| 470 | |
Paul Lawrence | 4f13a90 | 2019-01-10 13:06:07 -0800 | [diff] [blame] | 471 | } // namespace |
| 472 | |
Daniel Rosenberg | dda5981 | 2019-03-06 17:45:17 -0800 | [diff] [blame] | 473 | Status cp_restoreCheckpoint(const std::string& blockDevice, int restore_limit) { |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 474 | bool validating = true; |
| 475 | std::string action = "Validating"; |
Daniel Rosenberg | dda5981 | 2019-03-06 17:45:17 -0800 | [diff] [blame] | 476 | int restore_count = 0; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 477 | |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 478 | for (;;) { |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 479 | Relocations relocations; |
| 480 | relocations[0] = 0; |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 481 | Status status = Status::ok(); |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 482 | |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 483 | LOG(INFO) << action << " checkpoint on " << blockDevice; |
Daniel Rosenberg | 8271ae9 | 2019-03-04 21:46:31 -0800 | [diff] [blame] | 484 | base::unique_fd device_fd(open(blockDevice.c_str(), O_RDWR)); |
| 485 | if (device_fd < 0) { |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 486 | PLOG(ERROR) << "Cannot open " << blockDevice; |
| 487 | return Status::fromExceptionCode(errno, ("Cannot open " + blockDevice).c_str()); |
| 488 | } |
Paul Lawrence | 4f13a90 | 2019-01-10 13:06:07 -0800 | [diff] [blame] | 489 | |
Paul Lawrence | f507768 | 2019-01-18 10:28:34 -0800 | [diff] [blame] | 490 | log_sector_v1_0 original_ls; |
Daniel Rosenberg | 8271ae9 | 2019-03-04 21:46:31 -0800 | [diff] [blame] | 491 | read(device_fd, reinterpret_cast<char*>(&original_ls), sizeof(original_ls)); |
Daniel Rosenberg | 5298593 | 2019-03-01 22:01:22 -0800 | [diff] [blame] | 492 | if (original_ls.magic == kPartialRestoreMagic) { |
| 493 | validating = false; |
| 494 | action = "Restoring"; |
| 495 | } else if (original_ls.magic != kMagic) { |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 496 | LOG(ERROR) << "No magic"; |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 497 | return Status::fromExceptionCode(EINVAL, "No magic"); |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 498 | } |
| 499 | |
Paul Lawrence | 4f13a90 | 2019-01-10 13:06:07 -0800 | [diff] [blame] | 500 | LOG(INFO) << action << " " << original_ls.sequence << " log sectors"; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 501 | |
Paul Lawrence | 4f13a90 | 2019-01-10 13:06:07 -0800 | [diff] [blame] | 502 | for (int sequence = original_ls.sequence; sequence >= 0 && status.isOk(); sequence--) { |
Daniel Rosenberg | 5298593 | 2019-03-01 22:01:22 -0800 | [diff] [blame] | 503 | auto ls_buffer = relocatedRead(device_fd, relocations, validating, 0, |
| 504 | original_ls.block_size, original_ls.block_size); |
| 505 | log_sector_v1_0& ls = *reinterpret_cast<log_sector_v1_0*>(&ls_buffer[0]); |
| 506 | |
| 507 | Used_Sectors used_sectors; |
| 508 | used_sectors[0] = false; |
| 509 | |
| 510 | if (ls.magic != kMagic && (ls.magic != kPartialRestoreMagic || validating)) { |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 511 | LOG(ERROR) << "No magic!"; |
| 512 | status = Status::fromExceptionCode(EINVAL, "No magic"); |
| 513 | break; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 514 | } |
| 515 | |
Paul Lawrence | 4f13a90 | 2019-01-10 13:06:07 -0800 | [diff] [blame] | 516 | if (ls.block_size != original_ls.block_size) { |
| 517 | LOG(ERROR) << "Block size mismatch!"; |
| 518 | status = Status::fromExceptionCode(EINVAL, "Block size mismatch"); |
| 519 | break; |
| 520 | } |
| 521 | |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 522 | if ((int)ls.sequence != sequence) { |
| 523 | LOG(ERROR) << "Expecting log sector " << sequence << " but got " << ls.sequence; |
| 524 | status = Status::fromExceptionCode( |
| 525 | EINVAL, ("Expecting log sector " + std::to_string(sequence) + " but got " + |
| 526 | std::to_string(ls.sequence)) |
| 527 | .c_str()); |
| 528 | break; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 529 | } |
| 530 | |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 531 | LOG(INFO) << action << " from log sector " << ls.sequence; |
Paul Lawrence | f507768 | 2019-01-18 10:28:34 -0800 | [diff] [blame] | 532 | for (log_entry* le = |
Daniel Rosenberg | 5298593 | 2019-03-01 22:01:22 -0800 | [diff] [blame] | 533 | reinterpret_cast<log_entry*>(&ls_buffer[ls.header_size]) + ls.count - 1; |
| 534 | le >= reinterpret_cast<log_entry*>(&ls_buffer[ls.header_size]); --le) { |
Paul Lawrence | f507768 | 2019-01-18 10:28:34 -0800 | [diff] [blame] | 535 | // This is very noisy - limit to DEBUG only |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 536 | LOG(VERBOSE) << action << " " << le->size << " bytes from sector " << le->dest |
| 537 | << " to " << le->source << " with checksum " << std::hex |
| 538 | << le->checksum; |
Paul Lawrence | f507768 | 2019-01-18 10:28:34 -0800 | [diff] [blame] | 539 | |
Daniel Rosenberg | 8271ae9 | 2019-03-04 21:46:31 -0800 | [diff] [blame] | 540 | auto buffer = relocatedRead(device_fd, relocations, validating, le->dest, le->size, |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 541 | ls.block_size); |
Paul Lawrence | 4f13a90 | 2019-01-10 13:06:07 -0800 | [diff] [blame] | 542 | uint32_t checksum = le->source / (ls.block_size / kSectorSize); |
| 543 | for (size_t i = 0; i < le->size; i += ls.block_size) { |
| 544 | crc32(&buffer[i], ls.block_size, &checksum); |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | if (le->checksum && checksum != le->checksum) { |
| 548 | LOG(ERROR) << "Checksums don't match " << std::hex << checksum; |
| 549 | status = Status::fromExceptionCode(EINVAL, "Checksums don't match"); |
| 550 | break; |
| 551 | } |
| 552 | |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 553 | if (validating) { |
Daniel Rosenberg | 5298593 | 2019-03-01 22:01:22 -0800 | [diff] [blame] | 554 | relocate(relocations, le->source, le->dest, (le->size - 1) / kSectorSize + 1); |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 555 | } else { |
Daniel Rosenberg | 5298593 | 2019-03-01 22:01:22 -0800 | [diff] [blame] | 556 | restoreSector(device_fd, used_sectors, ls_buffer, le, buffer); |
Daniel Rosenberg | dda5981 | 2019-03-06 17:45:17 -0800 | [diff] [blame] | 557 | restore_count++; |
| 558 | if (restore_limit && restore_count >= restore_limit) { |
| 559 | LOG(WARNING) << "Hit the test limit"; |
| 560 | status = Status::fromExceptionCode(EAGAIN, "Hit the test limit"); |
| 561 | break; |
| 562 | } |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 563 | } |
| 564 | } |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 565 | } |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 566 | |
| 567 | if (!status.isOk()) { |
| 568 | if (!validating) { |
| 569 | LOG(ERROR) << "Checkpoint restore failed even though checkpoint validation passed"; |
| 570 | return status; |
| 571 | } |
| 572 | |
| 573 | LOG(WARNING) << "Checkpoint validation failed - attempting to roll forward"; |
Daniel Rosenberg | 8271ae9 | 2019-03-04 21:46:31 -0800 | [diff] [blame] | 574 | auto buffer = relocatedRead(device_fd, relocations, false, original_ls.sector0, |
Paul Lawrence | d41a939 | 2019-01-22 14:31:43 -0800 | [diff] [blame] | 575 | original_ls.block_size, original_ls.block_size); |
Daniel Rosenberg | 8271ae9 | 2019-03-04 21:46:31 -0800 | [diff] [blame] | 576 | lseek64(device_fd, 0, SEEK_SET); |
| 577 | write(device_fd, &buffer[0], original_ls.block_size); |
Paul Lawrence | 27691c2 | 2018-11-20 14:07:59 -0800 | [diff] [blame] | 578 | return Status::ok(); |
| 579 | } |
| 580 | |
| 581 | if (!validating) break; |
| 582 | |
| 583 | validating = false; |
| 584 | action = "Restoring"; |
Paul Lawrence | 1abb2fe | 2018-09-21 10:49:57 -0700 | [diff] [blame] | 585 | } |
| 586 | |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 587 | return Status::ok(); |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 588 | } |
| 589 | |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 590 | Status cp_markBootAttempt() { |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 591 | std::string oldContent, newContent; |
| 592 | int retry = 0; |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 593 | struct stat st; |
| 594 | int result = stat(kMetadataCPFile.c_str(), &st); |
| 595 | |
| 596 | // If the file doesn't exist, we aren't managing a checkpoint retry counter |
| 597 | if (result != 0) return Status::ok(); |
| 598 | if (!android::base::ReadFileToString(kMetadataCPFile, &oldContent)) { |
| 599 | PLOG(ERROR) << "Failed to read checkpoint file"; |
| 600 | return Status::fromExceptionCode(errno, "Failed to read checkpoint file"); |
| 601 | } |
Daniel Rosenberg | d399249 | 2018-10-02 17:40:44 -0700 | [diff] [blame] | 602 | std::string retryContent = oldContent.substr(0, oldContent.find_first_of(" ")); |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 603 | |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 604 | if (!android::base::ParseInt(retryContent, &retry)) |
| 605 | return Status::fromExceptionCode(EINVAL, "Could not parse retry count"); |
| 606 | if (retry > 0) { |
| 607 | retry--; |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 608 | |
Daniel Rosenberg | 73680ec | 2018-10-10 18:52:04 -0700 | [diff] [blame] | 609 | newContent = std::to_string(retry); |
| 610 | if (!android::base::WriteStringToFile(newContent, kMetadataCPFile)) |
| 611 | return Status::fromExceptionCode(errno, "Could not write checkpoint file"); |
| 612 | } |
| 613 | return Status::ok(); |
Daniel Rosenberg | 65f99c9 | 2018-08-28 01:58:49 -0700 | [diff] [blame] | 614 | } |
| 615 | |
| 616 | } // namespace vold |
| 617 | } // namespace android |