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authorEthan Yonker <dees_troy@teamw.in>2017-12-14 21:43:59 +0100
committerEthan Yonker <dees_troy@teamw.in>2017-12-15 19:48:49 +0100
commitecbd3e8ba9d84eca9d4fdea9b24717364f81a668 (patch)
treed3027aeb161e13673416d1684e6f4e47c85241d0 /update_verifier
parentFix build error in AOSP 8.1.0 r1 tree (diff)
parentMerge cherrypicks of [3156476, 3155698, 3156194, 3156639, 3156018, 3156477, 3156098, 3156099, 3156100, 3156101, 3156102, 3158393, 3155699, 3155700, 3156195, 3156196, 3156019, 3156020, 3158394] into oc-mr1-release (diff)
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Diffstat (limited to '')
-rw-r--r--update_verifier/Android.mk46
-rw-r--r--update_verifier/include/update_verifier/update_verifier.h24
-rw-r--r--update_verifier/update_verifier.cpp209
-rw-r--r--update_verifier/update_verifier_main.cpp23
4 files changed, 221 insertions, 81 deletions
diff --git a/update_verifier/Android.mk b/update_verifier/Android.mk
index 1acd5eca0..33c5fe9e7 100644
--- a/update_verifier/Android.mk
+++ b/update_verifier/Android.mk
@@ -14,12 +14,47 @@
LOCAL_PATH := $(call my-dir)
+# libupdate_verifier (static library)
+# ===============================
include $(CLEAR_VARS)
-LOCAL_CLANG := true
-LOCAL_SRC_FILES := update_verifier.cpp
+LOCAL_SRC_FILES := \
+ update_verifier.cpp
+
+LOCAL_MODULE := libupdate_verifier
+LOCAL_SHARED_LIBRARIES := \
+ libbase \
+ libcutils \
+ android.hardware.boot@1.0
+
+LOCAL_CFLAGS := -Wall -Werror
+
+LOCAL_EXPORT_C_INCLUDE_DIRS := \
+ $(LOCAL_PATH)/include
+
+LOCAL_C_INCLUDES := \
+ $(LOCAL_PATH)/include
+
+ifeq ($(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY),true)
+LOCAL_CFLAGS += -DPRODUCT_SUPPORTS_VERITY=1
+endif
+
+ifeq ($(BOARD_AVB_ENABLE),true)
+LOCAL_CFLAGS += -DBOARD_AVB_ENABLE=1
+endif
+
+include $(BUILD_STATIC_LIBRARY)
+
+# update_verifier (executable)
+# ===============================
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+ update_verifier_main.cpp
LOCAL_MODULE := update_verifier
+LOCAL_STATIC_LIBRARIES := \
+ libupdate_verifier
LOCAL_SHARED_LIBRARIES := \
libbase \
libcutils \
@@ -29,13 +64,8 @@ LOCAL_SHARED_LIBRARIES := \
libhidlbase \
android.hardware.boot@1.0
-LOCAL_CFLAGS := -Werror
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/..
+LOCAL_CFLAGS := -Wall -Werror
LOCAL_INIT_RC := update_verifier.rc
-ifeq ($(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VERITY),true)
- LOCAL_CFLAGS += -DPRODUCT_SUPPORTS_VERITY=1
-endif
-
include $(BUILD_EXECUTABLE)
diff --git a/update_verifier/include/update_verifier/update_verifier.h b/update_verifier/include/update_verifier/update_verifier.h
new file mode 100644
index 000000000..16b394e98
--- /dev/null
+++ b/update_verifier/include/update_verifier/update_verifier.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+#pragma once
+
+#include <string>
+
+int update_verifier(int argc, char** argv);
+
+// Exposed for testing purpose.
+bool verify_image(const std::string& care_map_name);
diff --git a/update_verifier/update_verifier.cpp b/update_verifier/update_verifier.cpp
index 350020f13..ba7b7aec4 100644
--- a/update_verifier/update_verifier.cpp
+++ b/update_verifier/update_verifier.cpp
@@ -35,6 +35,8 @@
* verifier reaches the end after the verification.
*/
+#include "update_verifier/update_verifier.h"
+
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
@@ -42,6 +44,8 @@
#include <string.h>
#include <unistd.h>
+#include <algorithm>
+#include <future>
#include <string>
#include <vector>
@@ -59,12 +63,6 @@ using android::hardware::boot::V1_0::IBootControl;
using android::hardware::boot::V1_0::BoolResult;
using android::hardware::boot::V1_0::CommandResult;
-constexpr auto CARE_MAP_FILE = "/data/ota_package/care_map.txt";
-constexpr auto DM_PATH_PREFIX = "/sys/block/";
-constexpr auto DM_PATH_SUFFIX = "/dm/name";
-constexpr auto DEV_PATH = "/dev/block/";
-constexpr int BLOCKSIZE = 4096;
-
// Find directories in format of "/sys/block/dm-X".
static int dm_name_filter(const dirent* de) {
if (android::base::StartsWith(de->d_name, "dm-")) {
@@ -82,6 +80,7 @@ static bool read_blocks(const std::string& partition, const std::string& range_s
// (or "vendor"), then dm-X is a dm-wrapped system/vendor partition.
// Afterwards, update_verifier will read every block on the care_map_file of
// "/dev/block/dm-X" to ensure the partition's integrity.
+ static constexpr auto DM_PATH_PREFIX = "/sys/block/";
dirent** namelist;
int n = scandir(DM_PATH_PREFIX, &namelist, dm_name_filter, alphasort);
if (n == -1) {
@@ -93,18 +92,29 @@ static bool read_blocks(const std::string& partition, const std::string& range_s
return false;
}
+ static constexpr auto DM_PATH_SUFFIX = "/dm/name";
+ static constexpr auto DEV_PATH = "/dev/block/";
std::string dm_block_device;
while (n--) {
std::string path = DM_PATH_PREFIX + std::string(namelist[n]->d_name) + DM_PATH_SUFFIX;
std::string content;
if (!android::base::ReadFileToString(path, &content)) {
PLOG(WARNING) << "Failed to read " << path;
- } else if (android::base::Trim(content) == partition) {
- dm_block_device = DEV_PATH + std::string(namelist[n]->d_name);
- while (n--) {
- free(namelist[n]);
+ } else {
+ std::string dm_block_name = android::base::Trim(content);
+#ifdef BOARD_AVB_ENABLE
+ // AVB is using 'vroot' for the root block device but we're expecting 'system'.
+ if (dm_block_name == "vroot") {
+ dm_block_name = "system";
+ }
+#endif
+ if (dm_block_name == partition) {
+ dm_block_device = DEV_PATH + std::string(namelist[n]->d_name);
+ while (n--) {
+ free(namelist[n]);
+ }
+ break;
}
- break;
}
free(namelist[n]);
}
@@ -114,11 +124,6 @@ static bool read_blocks(const std::string& partition, const std::string& range_s
LOG(ERROR) << "Failed to find dm block device for " << partition;
return false;
}
- android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(dm_block_device.c_str(), O_RDONLY)));
- if (fd.get() == -1) {
- PLOG(ERROR) << "Error reading " << dm_block_device << " for partition " << partition;
- return false;
- }
// For block range string, first integer 'count' equals 2 * total number of valid ranges,
// followed by 'count' number comma separated integers. Every two integers reprensent a
@@ -132,69 +137,113 @@ static bool read_blocks(const std::string& partition, const std::string& range_s
LOG(ERROR) << "Error in parsing range string.";
return false;
}
+ range_count /= 2;
- size_t blk_count = 0;
- for (size_t i = 1; i < ranges.size(); i += 2) {
- unsigned int range_start, range_end;
- bool parse_status = android::base::ParseUint(ranges[i], &range_start);
- parse_status = parse_status && android::base::ParseUint(ranges[i + 1], &range_end);
- if (!parse_status || range_start >= range_end) {
- LOG(ERROR) << "Invalid range pair " << ranges[i] << ", " << ranges[i + 1];
- return false;
- }
+ std::vector<std::future<bool>> threads;
+ size_t thread_num = std::thread::hardware_concurrency() ?: 4;
+ thread_num = std::min(thread_num, range_count);
+ size_t group_range_count = (range_count + thread_num - 1) / thread_num;
- if (lseek64(fd.get(), static_cast<off64_t>(range_start) * BLOCKSIZE, SEEK_SET) == -1) {
- PLOG(ERROR) << "lseek to " << range_start << " failed";
- return false;
- }
+ for (size_t t = 0; t < thread_num; t++) {
+ auto thread_func = [t, group_range_count, &dm_block_device, &ranges, &partition]() {
+ size_t blk_count = 0;
+ static constexpr size_t kBlockSize = 4096;
+ std::vector<uint8_t> buf(1024 * kBlockSize);
+ android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(dm_block_device.c_str(), O_RDONLY)));
+ if (fd.get() == -1) {
+ PLOG(ERROR) << "Error reading " << dm_block_device << " for partition " << partition;
+ return false;
+ }
- size_t size = (range_end - range_start) * BLOCKSIZE;
- std::vector<uint8_t> buf(size);
- if (!android::base::ReadFully(fd.get(), buf.data(), size)) {
- PLOG(ERROR) << "Failed to read blocks " << range_start << " to " << range_end;
- return false;
- }
- blk_count += (range_end - range_start);
+ for (size_t i = group_range_count * 2 * t + 1;
+ i < std::min(group_range_count * 2 * (t + 1) + 1, ranges.size()); i += 2) {
+ unsigned int range_start, range_end;
+ bool parse_status = android::base::ParseUint(ranges[i], &range_start);
+ parse_status = parse_status && android::base::ParseUint(ranges[i + 1], &range_end);
+ if (!parse_status || range_start >= range_end) {
+ LOG(ERROR) << "Invalid range pair " << ranges[i] << ", " << ranges[i + 1];
+ return false;
+ }
+
+ if (lseek64(fd.get(), static_cast<off64_t>(range_start) * kBlockSize, SEEK_SET) == -1) {
+ PLOG(ERROR) << "lseek to " << range_start << " failed";
+ return false;
+ }
+
+ size_t remain = (range_end - range_start) * kBlockSize;
+ while (remain > 0) {
+ size_t to_read = std::min(remain, 1024 * kBlockSize);
+ if (!android::base::ReadFully(fd.get(), buf.data(), to_read)) {
+ PLOG(ERROR) << "Failed to read blocks " << range_start << " to " << range_end;
+ return false;
+ }
+ remain -= to_read;
+ }
+ blk_count += (range_end - range_start);
+ }
+ LOG(INFO) << "Finished reading " << blk_count << " blocks on " << dm_block_device;
+ return true;
+ };
+
+ threads.emplace_back(std::async(std::launch::async, thread_func));
}
- LOG(INFO) << "Finished reading " << blk_count << " blocks on " << dm_block_device;
- return true;
+ bool ret = true;
+ for (auto& t : threads) {
+ ret = t.get() && ret;
+ }
+ LOG(INFO) << "Finished reading blocks on " << dm_block_device << " with " << thread_num
+ << " threads.";
+ return ret;
}
-static bool verify_image(const std::string& care_map_name) {
- android::base::unique_fd care_map_fd(TEMP_FAILURE_RETRY(open(care_map_name.c_str(), O_RDONLY)));
- // If the device is flashed before the current boot, it may not have care_map.txt
- // in /data/ota_package. To allow the device to continue booting in this situation,
- // we should print a warning and skip the block verification.
- if (care_map_fd.get() == -1) {
- PLOG(WARNING) << "Failed to open " << care_map_name;
- return true;
- }
- // Care map file has four lines (two lines if vendor partition is not present):
- // First line has the block partition name (system/vendor).
- // Second line holds all ranges of blocks to verify.
- // The next two lines have the same format but for vendor partition.
- std::string file_content;
- if (!android::base::ReadFdToString(care_map_fd.get(), &file_content)) {
- LOG(ERROR) << "Error reading care map contents to string.";
- return false;
- }
+// Returns true to indicate a passing verification (or the error should be ignored); Otherwise
+// returns false on fatal errors, where we should reject the current boot and trigger a fallback.
+// Note that update_verifier should be backward compatible to not reject care_map.txt from old
+// releases, which could otherwise fail to boot into the new release. For example, we've changed
+// the care_map format between N and O. An O update_verifier would fail to work with N
+// care_map.txt. This could be a result of sideloading an O OTA while the device having a pending N
+// update.
+bool verify_image(const std::string& care_map_name) {
+ android::base::unique_fd care_map_fd(TEMP_FAILURE_RETRY(open(care_map_name.c_str(), O_RDONLY)));
+ // If the device is flashed before the current boot, it may not have care_map.txt
+ // in /data/ota_package. To allow the device to continue booting in this situation,
+ // we should print a warning and skip the block verification.
+ if (care_map_fd.get() == -1) {
+ PLOG(WARNING) << "Failed to open " << care_map_name;
+ return true;
+ }
+ // Care map file has four lines (two lines if vendor partition is not present):
+ // First line has the block partition name (system/vendor).
+ // Second line holds all ranges of blocks to verify.
+ // The next two lines have the same format but for vendor partition.
+ std::string file_content;
+ if (!android::base::ReadFdToString(care_map_fd.get(), &file_content)) {
+ LOG(ERROR) << "Error reading care map contents to string.";
+ return false;
+ }
- std::vector<std::string> lines;
- lines = android::base::Split(android::base::Trim(file_content), "\n");
- if (lines.size() != 2 && lines.size() != 4) {
- LOG(ERROR) << "Invalid lines in care_map: found " << lines.size()
- << " lines, expecting 2 or 4 lines.";
- return false;
- }
+ std::vector<std::string> lines;
+ lines = android::base::Split(android::base::Trim(file_content), "\n");
+ if (lines.size() != 2 && lines.size() != 4) {
+ LOG(ERROR) << "Invalid lines in care_map: found " << lines.size()
+ << " lines, expecting 2 or 4 lines.";
+ return false;
+ }
- for (size_t i = 0; i < lines.size(); i += 2) {
- if (!read_blocks(lines[i], lines[i+1])) {
- return false;
- }
+ for (size_t i = 0; i < lines.size(); i += 2) {
+ // We're seeing an N care_map.txt. Skip the verification since it's not compatible with O
+ // update_verifier (the last few metadata blocks can't be read via device mapper).
+ if (android::base::StartsWith(lines[i], "/dev/block/")) {
+ LOG(WARNING) << "Found legacy care_map.txt; skipped.";
+ return true;
+ }
+ if (!read_blocks(lines[i], lines[i+1])) {
+ return false;
}
+ }
- return true;
+ return true;
}
static int reboot_device() {
@@ -205,7 +254,7 @@ static int reboot_device() {
while (true) pause();
}
-int main(int argc, char** argv) {
+int update_verifier(int argc, char** argv) {
for (int i = 1; i < argc; i++) {
LOG(INFO) << "Started with arg " << i << ": " << argv[i];
}
@@ -224,23 +273,37 @@ int main(int argc, char** argv) {
if (is_successful == BoolResult::FALSE) {
// The current slot has not booted successfully.
-#ifdef PRODUCT_SUPPORTS_VERITY
+#if defined(PRODUCT_SUPPORTS_VERITY) || defined(BOARD_AVB_ENABLE)
+ bool skip_verification = false;
std::string verity_mode = android::base::GetProperty("ro.boot.veritymode", "");
if (verity_mode.empty()) {
+ // With AVB it's possible to disable verification entirely and
+ // in this case ro.boot.veritymode is empty.
+#if defined(BOARD_AVB_ENABLE)
+ LOG(WARNING) << "verification has been disabled; marking without verification.";
+ skip_verification = true;
+#else
LOG(ERROR) << "Failed to get dm-verity mode.";
return reboot_device();
+#endif
} else if (android::base::EqualsIgnoreCase(verity_mode, "eio")) {
// We shouldn't see verity in EIO mode if the current slot hasn't booted successfully before.
// Continue the verification until we fail to read some blocks.
LOG(WARNING) << "Found dm-verity in EIO mode.";
+ } else if (android::base::EqualsIgnoreCase(verity_mode, "disabled")) {
+ LOG(WARNING) << "dm-verity in disabled mode; marking without verification.";
+ skip_verification = true;
} else if (verity_mode != "enforcing") {
LOG(ERROR) << "Unexpected dm-verity mode : " << verity_mode << ", expecting enforcing.";
return reboot_device();
}
- if (!verify_image(CARE_MAP_FILE)) {
- LOG(ERROR) << "Failed to verify all blocks in care map file.";
- return reboot_device();
+ if (!skip_verification) {
+ static constexpr auto CARE_MAP_FILE = "/data/ota_package/care_map.txt";
+ if (!verify_image(CARE_MAP_FILE)) {
+ LOG(ERROR) << "Failed to verify all blocks in care map file.";
+ return reboot_device();
+ }
}
#else
LOG(WARNING) << "dm-verity not enabled; marking without verification.";
diff --git a/update_verifier/update_verifier_main.cpp b/update_verifier/update_verifier_main.cpp
new file mode 100644
index 000000000..46e8bbb59
--- /dev/null
+++ b/update_verifier/update_verifier_main.cpp
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+// See the comments in update_verifier.cpp.
+
+#include "update_verifier/update_verifier.h"
+
+int main(int argc, char** argv) {
+ return update_verifier(argc, argv);
+}