/*
* Copyright (C) 2016 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <algorithm>
#include <memory>
#include <string>
#include <unordered_map>
#include <vector>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <android-base/test_utils.h>
#include <bootloader_message/bootloader_message.h>
#include <brotli/encode.h>
#include <bsdiff/bsdiff.h>
#include <gtest/gtest.h>
#include <ziparchive/zip_archive.h>
#include <ziparchive/zip_writer.h>
#include "common/test_constants.h"
#include "edify/expr.h"
#include "otautil/error_code.h"
#include "otautil/paths.h"
#include "otautil/print_sha1.h"
#include "otautil/sysutil.h"
#include "updater/blockimg.h"
#include "updater/install.h"
#include "updater/updater.h"
using PackageEntries = std::unordered_map<std::string, std::string>;
static constexpr size_t kTransferListHeaderLines = 4;
struct selabel_handle* sehandle = nullptr;
static void expect(const char* expected, const char* expr_str, CauseCode cause_code,
UpdaterInfo* info = nullptr) {
std::unique_ptr<Expr> e;
int error_count = 0;
ASSERT_EQ(0, parse_string(expr_str, &e, &error_count));
ASSERT_EQ(0, error_count);
State state(expr_str, info);
std::string result;
bool status = Evaluate(&state, e, &result);
if (expected == nullptr) {
ASSERT_FALSE(status);
} else {
ASSERT_TRUE(status);
ASSERT_STREQ(expected, result.c_str());
}
// Error code is set in updater/updater.cpp only, by parsing State.errmsg.
ASSERT_EQ(kNoError, state.error_code);
// Cause code should always be available.
ASSERT_EQ(cause_code, state.cause_code);
}
static void BuildUpdatePackage(const PackageEntries& entries, int fd) {
FILE* zip_file_ptr = fdopen(fd, "wb");
ZipWriter zip_writer(zip_file_ptr);
for (const auto& entry : entries) {
// All the entries are written as STORED.
ASSERT_EQ(0, zip_writer.StartEntry(entry.first.c_str(), 0));
if (!entry.second.empty()) {
ASSERT_EQ(0, zip_writer.WriteBytes(entry.second.data(), entry.second.size()));
}
ASSERT_EQ(0, zip_writer.FinishEntry());
}
ASSERT_EQ(0, zip_writer.Finish());
ASSERT_EQ(0, fclose(zip_file_ptr));
}
static void RunBlockImageUpdate(bool is_verify, const PackageEntries& entries,
const std::string& image_file, const std::string& result) {
CHECK(entries.find("transfer_list") != entries.end());
// Build the update package.
TemporaryFile zip_file;
BuildUpdatePackage(entries, zip_file.release());
MemMapping map;
ASSERT_TRUE(map.MapFile(zip_file.path));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFromMemory(map.addr, map.length, zip_file.path, &handle));
// Set up the handler, command_pipe, patch offset & length.
UpdaterInfo updater_info;
updater_info.package_zip = handle;
TemporaryFile temp_pipe;
updater_info.cmd_pipe = fdopen(temp_pipe.release(), "wbe");
updater_info.package_zip_addr = map.addr;
updater_info.package_zip_len = map.length;
std::string new_data = entries.find("new_data.br") != entries.end() ? "new_data.br" : "new_data";
std::string script = is_verify ? "block_image_verify" : "block_image_update";
script += R"((")" + image_file + R"(", package_extract_file("transfer_list"), ")" + new_data +
R"(", "patch_data"))";
expect(result.c_str(), script.c_str(), kNoCause, &updater_info);
ASSERT_EQ(0, fclose(updater_info.cmd_pipe));
CloseArchive(handle);
}
static std::string get_sha1(const std::string& content) {
uint8_t digest[SHA_DIGEST_LENGTH];
SHA1(reinterpret_cast<const uint8_t*>(content.c_str()), content.size(), digest);
return print_sha1(digest);
}
class UpdaterTest : public ::testing::Test {
protected:
void SetUp() override {
RegisterBuiltins();
RegisterInstallFunctions();
RegisterBlockImageFunctions();
// Each test is run in a separate process (isolated mode). Shared temporary files won't cause
// conflicts.
Paths::Get().set_cache_temp_source(temp_saved_source_.path);
Paths::Get().set_last_command_file(temp_last_command_.path);
Paths::Get().set_stash_directory_base(temp_stash_base_.path);
last_command_file_ = temp_last_command_.path;
image_file_ = image_temp_file_.path;
}
void TearDown() override {
// Clean up the last_command_file if any.
ASSERT_TRUE(android::base::RemoveFileIfExists(last_command_file_));
// Clear partition updated marker if any.
std::string updated_marker{ temp_stash_base_.path };
updated_marker += "/" + get_sha1(image_temp_file_.path) + ".UPDATED";
ASSERT_TRUE(android::base::RemoveFileIfExists(updated_marker));
}
TemporaryFile temp_saved_source_;
TemporaryDir temp_stash_base_;
std::string last_command_file_;
std::string image_file_;
private:
TemporaryFile temp_last_command_;
TemporaryFile image_temp_file_;
};
TEST_F(UpdaterTest, getprop) {
expect(android::base::GetProperty("ro.product.device", "").c_str(),
"getprop(\"ro.product.device\")",
kNoCause);
expect(android::base::GetProperty("ro.build.fingerprint", "").c_str(),
"getprop(\"ro.build.fingerprint\")",
kNoCause);
// getprop() accepts only one parameter.
expect(nullptr, "getprop()", kArgsParsingFailure);
expect(nullptr, "getprop(\"arg1\", \"arg2\")", kArgsParsingFailure);
}
TEST_F(UpdaterTest, sha1_check) {
// sha1_check(data) returns the SHA-1 of the data.
expect("81fe8bfe87576c3ecb22426f8e57847382917acf", "sha1_check(\"abcd\")", kNoCause);
expect("da39a3ee5e6b4b0d3255bfef95601890afd80709", "sha1_check(\"\")", kNoCause);
// sha1_check(data, sha1_hex, [sha1_hex, ...]) returns the matched SHA-1.
expect("81fe8bfe87576c3ecb22426f8e57847382917acf",
"sha1_check(\"abcd\", \"81fe8bfe87576c3ecb22426f8e57847382917acf\")",
kNoCause);
expect("81fe8bfe87576c3ecb22426f8e57847382917acf",
"sha1_check(\"abcd\", \"wrong_sha1\", \"81fe8bfe87576c3ecb22426f8e57847382917acf\")",
kNoCause);
// Or "" if there's no match.
expect("",
"sha1_check(\"abcd\", \"wrong_sha1\")",
kNoCause);
expect("",
"sha1_check(\"abcd\", \"wrong_sha1\", \"wrong_sha2\")",
kNoCause);
// sha1_check() expects at least one argument.
expect(nullptr, "sha1_check()", kArgsParsingFailure);
}
TEST_F(UpdaterTest, apply_patch_check) {
// Zero-argument is not valid.
expect(nullptr, "apply_patch_check()", kArgsParsingFailure);
// File not found.
expect("", "apply_patch_check(\"/doesntexist\")", kNoCause);
std::string src_file = from_testdata_base("old.file");
std::string src_content;
ASSERT_TRUE(android::base::ReadFileToString(src_file, &src_content));
size_t src_size = src_content.size();
std::string src_hash = get_sha1(src_content);
// One-argument with EMMC:file:size:sha1 should pass the check.
std::string filename = android::base::Join(
std::vector<std::string>{ "EMMC", src_file, std::to_string(src_size), src_hash }, ":");
std::string cmd = "apply_patch_check(\"" + filename + "\")";
expect("t", cmd.c_str(), kNoCause);
// EMMC:file:(size-1):sha1:(size+1):sha1 should fail the check.
std::string filename_bad = android::base::Join(
std::vector<std::string>{ "EMMC", src_file, std::to_string(src_size - 1), src_hash,
std::to_string(src_size + 1), src_hash },
":");
cmd = "apply_patch_check(\"" + filename_bad + "\")";
expect("", cmd.c_str(), kNoCause);
// EMMC:file:(size-1):sha1:size:sha1:(size+1):sha1 should pass the check.
filename_bad =
android::base::Join(std::vector<std::string>{ "EMMC", src_file, std::to_string(src_size - 1),
src_hash, std::to_string(src_size), src_hash,
std::to_string(src_size + 1), src_hash },
":");
cmd = "apply_patch_check(\"" + filename_bad + "\")";
expect("t", cmd.c_str(), kNoCause);
// Multiple arguments.
cmd = "apply_patch_check(\"" + filename + "\", \"wrong_sha1\", \"wrong_sha2\")";
expect("", cmd.c_str(), kNoCause);
cmd = "apply_patch_check(\"" + filename + "\", \"wrong_sha1\", \"" + src_hash +
"\", \"wrong_sha2\")";
expect("t", cmd.c_str(), kNoCause);
cmd = "apply_patch_check(\"" + filename_bad + "\", \"wrong_sha1\", \"" + src_hash +
"\", \"wrong_sha2\")";
expect("t", cmd.c_str(), kNoCause);
}
TEST_F(UpdaterTest, file_getprop) {
// file_getprop() expects two arguments.
expect(nullptr, "file_getprop()", kArgsParsingFailure);
expect(nullptr, "file_getprop(\"arg1\")", kArgsParsingFailure);
expect(nullptr, "file_getprop(\"arg1\", \"arg2\", \"arg3\")", kArgsParsingFailure);
// File doesn't exist.
expect(nullptr, "file_getprop(\"/doesntexist\", \"key1\")", kFileGetPropFailure);
// Reject too large files (current limit = 65536).
TemporaryFile temp_file1;
std::string buffer(65540, '\0');
ASSERT_TRUE(android::base::WriteStringToFile(buffer, temp_file1.path));
// Read some keys.
TemporaryFile temp_file2;
std::string content("ro.product.name=tardis\n"
"# comment\n\n\n"
"ro.product.model\n"
"ro.product.board = magic \n");
ASSERT_TRUE(android::base::WriteStringToFile(content, temp_file2.path));
std::string script1("file_getprop(\"" + std::string(temp_file2.path) +
"\", \"ro.product.name\")");
expect("tardis", script1.c_str(), kNoCause);
std::string script2("file_getprop(\"" + std::string(temp_file2.path) +
"\", \"ro.product.board\")");
expect("magic", script2.c_str(), kNoCause);
// No match.
std::string script3("file_getprop(\"" + std::string(temp_file2.path) +
"\", \"ro.product.wrong\")");
expect("", script3.c_str(), kNoCause);
std::string script4("file_getprop(\"" + std::string(temp_file2.path) +
"\", \"ro.product.name=\")");
expect("", script4.c_str(), kNoCause);
std::string script5("file_getprop(\"" + std::string(temp_file2.path) +
"\", \"ro.product.nam\")");
expect("", script5.c_str(), kNoCause);
std::string script6("file_getprop(\"" + std::string(temp_file2.path) +
"\", \"ro.product.model\")");
expect("", script6.c_str(), kNoCause);
}
// TODO: Test extracting to block device.
TEST_F(UpdaterTest, package_extract_file) {
// package_extract_file expects 1 or 2 arguments.
expect(nullptr, "package_extract_file()", kArgsParsingFailure);
expect(nullptr, "package_extract_file(\"arg1\", \"arg2\", \"arg3\")", kArgsParsingFailure);
std::string zip_path = from_testdata_base("ziptest_valid.zip");
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchive(zip_path.c_str(), &handle));
// Need to set up the ziphandle.
UpdaterInfo updater_info;
updater_info.package_zip = handle;
// Two-argument version.
TemporaryFile temp_file1;
std::string script("package_extract_file(\"a.txt\", \"" + std::string(temp_file1.path) + "\")");
expect("t", script.c_str(), kNoCause, &updater_info);
// Verify the extracted entry.
std::string data;
ASSERT_TRUE(android::base::ReadFileToString(temp_file1.path, &data));
ASSERT_EQ(kATxtContents, data);
// Now extract another entry to the same location, which should overwrite.
script = "package_extract_file(\"b.txt\", \"" + std::string(temp_file1.path) + "\")";
expect("t", script.c_str(), kNoCause, &updater_info);
ASSERT_TRUE(android::base::ReadFileToString(temp_file1.path, &data));
ASSERT_EQ(kBTxtContents, data);
// Missing zip entry. The two-argument version doesn't abort.
script = "package_extract_file(\"doesntexist\", \"" + std::string(temp_file1.path) + "\")";
expect("", script.c_str(), kNoCause, &updater_info);
// Extract to /dev/full should fail.
script = "package_extract_file(\"a.txt\", \"/dev/full\")";
expect("", script.c_str(), kNoCause, &updater_info);
// One-argument version.
script = "sha1_check(package_extract_file(\"a.txt\"))";
expect(kATxtSha1Sum.c_str(), script.c_str(), kNoCause, &updater_info);
script = "sha1_check(package_extract_file(\"b.txt\"))";
expect(kBTxtSha1Sum.c_str(), script.c_str(), kNoCause, &updater_info);
// Missing entry. The one-argument version aborts the evaluation.
script = "package_extract_file(\"doesntexist\")";
expect(nullptr, script.c_str(), kPackageExtractFileFailure, &updater_info);
CloseArchive(handle);
}
TEST_F(UpdaterTest, write_value) {
// write_value() expects two arguments.
expect(nullptr, "write_value()", kArgsParsingFailure);
expect(nullptr, "write_value(\"arg1\")", kArgsParsingFailure);
expect(nullptr, "write_value(\"arg1\", \"arg2\", \"arg3\")", kArgsParsingFailure);
// filename cannot be empty.
expect(nullptr, "write_value(\"value\", \"\")", kArgsParsingFailure);
// Write some value to file.
TemporaryFile temp_file;
std::string value = "magicvalue";
std::string script("write_value(\"" + value + "\", \"" + std::string(temp_file.path) + "\")");
expect("t", script.c_str(), kNoCause);
// Verify the content.
std::string content;
ASSERT_TRUE(android::base::ReadFileToString(temp_file.path, &content));
ASSERT_EQ(value, content);
// Allow writing empty string.
script = "write_value(\"\", \"" + std::string(temp_file.path) + "\")";
expect("t", script.c_str(), kNoCause);
// Verify the content.
ASSERT_TRUE(android::base::ReadFileToString(temp_file.path, &content));
ASSERT_EQ("", content);
// It should fail gracefully when write fails.
script = "write_value(\"value\", \"/proc/0/file1\")";
expect("", script.c_str(), kNoCause);
}
TEST_F(UpdaterTest, get_stage) {
// get_stage() expects one argument.
expect(nullptr, "get_stage()", kArgsParsingFailure);
expect(nullptr, "get_stage(\"arg1\", \"arg2\")", kArgsParsingFailure);
expect(nullptr, "get_stage(\"arg1\", \"arg2\", \"arg3\")", kArgsParsingFailure);
// Set up a local file as BCB.
TemporaryFile tf;
std::string temp_file(tf.path);
bootloader_message boot;
strlcpy(boot.stage, "2/3", sizeof(boot.stage));
std::string err;
ASSERT_TRUE(write_bootloader_message_to(boot, temp_file, &err));
// Can read the stage value.
std::string script("get_stage(\"" + temp_file + "\")");
expect("2/3", script.c_str(), kNoCause);
// Bad BCB path.
script = "get_stage(\"doesntexist\")";
expect("", script.c_str(), kNoCause);
}
TEST_F(UpdaterTest, set_stage) {
// set_stage() expects two arguments.
expect(nullptr, "set_stage()", kArgsParsingFailure);
expect(nullptr, "set_stage(\"arg1\")", kArgsParsingFailure);
expect(nullptr, "set_stage(\"arg1\", \"arg2\", \"arg3\")", kArgsParsingFailure);
// Set up a local file as BCB.
TemporaryFile tf;
std::string temp_file(tf.path);
bootloader_message boot;
strlcpy(boot.command, "command", sizeof(boot.command));
strlcpy(boot.stage, "2/3", sizeof(boot.stage));
std::string err;
ASSERT_TRUE(write_bootloader_message_to(boot, temp_file, &err));
// Write with set_stage().
std::string script("set_stage(\"" + temp_file + "\", \"1/3\")");
expect(tf.path, script.c_str(), kNoCause);
// Verify.
bootloader_message boot_verify;
ASSERT_TRUE(read_bootloader_message_from(&boot_verify, temp_file, &err));
// Stage should be updated, with command part untouched.
ASSERT_STREQ("1/3", boot_verify.stage);
ASSERT_STREQ(boot.command, boot_verify.command);
// Bad BCB path.
script = "set_stage(\"doesntexist\", \"1/3\")";
expect("", script.c_str(), kNoCause);
script = "set_stage(\"/dev/full\", \"1/3\")";
expect("", script.c_str(), kNoCause);
}
TEST_F(UpdaterTest, set_progress) {
// set_progress() expects one argument.
expect(nullptr, "set_progress()", kArgsParsingFailure);
expect(nullptr, "set_progress(\"arg1\", \"arg2\")", kArgsParsingFailure);
// Invalid progress argument.
expect(nullptr, "set_progress(\"arg1\")", kArgsParsingFailure);
expect(nullptr, "set_progress(\"3x+5\")", kArgsParsingFailure);
expect(nullptr, "set_progress(\".3.5\")", kArgsParsingFailure);
TemporaryFile tf;
UpdaterInfo updater_info;
updater_info.cmd_pipe = fdopen(tf.release(), "w");
expect(".52", "set_progress(\".52\")", kNoCause, &updater_info);
fflush(updater_info.cmd_pipe);
std::string cmd;
ASSERT_TRUE(android::base::ReadFileToString(tf.path, &cmd));
ASSERT_EQ(android::base::StringPrintf("set_progress %f\n", .52), cmd);
// recovery-updater protocol expects 2 tokens ("set_progress <frac>").
ASSERT_EQ(2U, android::base::Split(cmd, " ").size());
ASSERT_EQ(0, fclose(updater_info.cmd_pipe));
}
TEST_F(UpdaterTest, show_progress) {
// show_progress() expects two arguments.
expect(nullptr, "show_progress()", kArgsParsingFailure);
expect(nullptr, "show_progress(\"arg1\")", kArgsParsingFailure);
expect(nullptr, "show_progress(\"arg1\", \"arg2\", \"arg3\")", kArgsParsingFailure);
// Invalid progress arguments.
expect(nullptr, "show_progress(\"arg1\", \"arg2\")", kArgsParsingFailure);
expect(nullptr, "show_progress(\"3x+5\", \"10\")", kArgsParsingFailure);
expect(nullptr, "show_progress(\".3\", \"5a\")", kArgsParsingFailure);
TemporaryFile tf;
UpdaterInfo updater_info;
updater_info.cmd_pipe = fdopen(tf.release(), "w");
expect(".52", "show_progress(\".52\", \"10\")", kNoCause, &updater_info);
fflush(updater_info.cmd_pipe);
std::string cmd;
ASSERT_TRUE(android::base::ReadFileToString(tf.path, &cmd));
ASSERT_EQ(android::base::StringPrintf("progress %f %d\n", .52, 10), cmd);
// recovery-updater protocol expects 3 tokens ("progress <frac> <secs>").
ASSERT_EQ(3U, android::base::Split(cmd, " ").size());
ASSERT_EQ(0, fclose(updater_info.cmd_pipe));
}
TEST_F(UpdaterTest, block_image_update_patch_data) {
std::string src_content = std::string(4096, 'a') + std::string(4096, 'c');
std::string tgt_content = std::string(4096, 'b') + std::string(4096, 'd');
// Generate the patch data.
TemporaryFile patch_file;
ASSERT_EQ(0,
bsdiff::bsdiff(reinterpret_cast<const uint8_t*>(src_content.data()), src_content.size(),
reinterpret_cast<const uint8_t*>(tgt_content.data()), tgt_content.size(),
patch_file.path, nullptr));
std::string patch_content;
ASSERT_TRUE(android::base::ReadFileToString(patch_file.path, &patch_content));
// Create the transfer list that contains a bsdiff.
std::string src_hash = get_sha1(src_content);
std::string tgt_hash = get_sha1(tgt_content);
std::vector<std::string> transfer_list{
// clang-format off
"4",
"2",
"0",
"2",
"stash " + src_hash + " 2,0,2",
android::base::StringPrintf("bsdiff 0 %zu %s %s 2,0,2 2 - %s:2,0,2", patch_content.size(),
src_hash.c_str(), tgt_hash.c_str(), src_hash.c_str()),
"free " + src_hash,
// clang-format on
};
PackageEntries entries{
{ "new_data", "" },
{ "patch_data", patch_content },
{ "transfer_list", android::base::Join(transfer_list, '\n') },
};
ASSERT_TRUE(android::base::WriteStringToFile(src_content, image_file_));
RunBlockImageUpdate(false, entries, image_file_, "t");
// The update_file should be patched correctly.
std::string updated_content;
ASSERT_TRUE(android::base::ReadFileToString(image_file_, &updated_content));
ASSERT_EQ(tgt_content, updated_content);
}
TEST_F(UpdaterTest, block_image_update_fail) {
std::string src_content(4096 * 2, 'e');
std::string src_hash = get_sha1(src_content);
// Stash and free some blocks, then fail the update intentionally.
std::vector<std::string> transfer_list{
// clang-format off
"4",
"2",
"0",
"2",
"stash " + src_hash + " 2,0,2",
"free " + src_hash,
"fail",
// clang-format on
};
// Add a new data of 10 bytes to test the deadlock.
PackageEntries entries{
{ "new_data", std::string(10, 0) },
{ "patch_data", "" },
{ "transfer_list", android::base::Join(transfer_list, '\n') },
};
ASSERT_TRUE(android::base::WriteStringToFile(src_content, image_file_));
RunBlockImageUpdate(false, entries, image_file_, "");
// Updater generates the stash name based on the input file name.
std::string name_digest = get_sha1(image_file_);
std::string stash_base = std::string(temp_stash_base_.path) + "/" + name_digest;
ASSERT_EQ(0, access(stash_base.c_str(), F_OK));
// Expect the stashed blocks to be freed.
ASSERT_EQ(-1, access((stash_base + src_hash).c_str(), F_OK));
ASSERT_EQ(0, rmdir(stash_base.c_str()));
}
TEST_F(UpdaterTest, new_data_over_write) {
std::vector<std::string> transfer_list{
// clang-format off
"4",
"1",
"0",
"0",
"new 2,0,1",
// clang-format on
};
// Write 4096 + 100 bytes of new data.
PackageEntries entries{
{ "new_data", std::string(4196, 0) },
{ "patch_data", "" },
{ "transfer_list", android::base::Join(transfer_list, '\n') },
};
RunBlockImageUpdate(false, entries, image_file_, "t");
}
TEST_F(UpdaterTest, new_data_short_write) {
std::vector<std::string> transfer_list{
// clang-format off
"4",
"1",
"0",
"0",
"new 2,0,1",
// clang-format on
};
PackageEntries entries{
{ "patch_data", "" },
{ "transfer_list", android::base::Join(transfer_list, '\n') },
};
// Updater should report the failure gracefully rather than stuck in deadlock.
entries["new_data"] = "";
RunBlockImageUpdate(false, entries, image_file_, "");
entries["new_data"] = std::string(10, 'a');
RunBlockImageUpdate(false, entries, image_file_, "");
// Expect to write 1 block of new data successfully.
entries["new_data"] = std::string(4096, 'a');
RunBlockImageUpdate(false, entries, image_file_, "t");
}
TEST_F(UpdaterTest, brotli_new_data) {
auto generator = []() { return rand() % 128; };
// Generate 100 blocks of random data.
std::string brotli_new_data;
brotli_new_data.reserve(4096 * 100);
generate_n(back_inserter(brotli_new_data), 4096 * 100, generator);
size_t encoded_size = BrotliEncoderMaxCompressedSize(brotli_new_data.size());
std::string encoded_data(encoded_size, 0);
ASSERT_TRUE(BrotliEncoderCompress(
BROTLI_DEFAULT_QUALITY, BROTLI_DEFAULT_WINDOW, BROTLI_DEFAULT_MODE, brotli_new_data.size(),
reinterpret_cast<const uint8_t*>(brotli_new_data.data()), &encoded_size,
reinterpret_cast<uint8_t*>(const_cast<char*>(encoded_data.data()))));
encoded_data.resize(encoded_size);
// Write a few small chunks of new data, then a large chunk, and finally a few small chunks.
// This helps us to catch potential short writes.
std::vector<std::string> transfer_list = {
"4",
"100",
"0",
"0",
"new 2,0,1",
"new 2,1,2",
"new 4,2,50,50,97",
"new 2,97,98",
"new 2,98,99",
"new 2,99,100",
};
PackageEntries entries{
{ "new_data.br", std::move(encoded_data) },
{ "patch_data", "" },
{ "transfer_list", android::base::Join(transfer_list, '\n') },
};
RunBlockImageUpdate(false, entries, image_file_, "t");
std::string updated_content;
ASSERT_TRUE(android::base::ReadFileToString(image_file_, &updated_content));
ASSERT_EQ(brotli_new_data, updated_content);
}
TEST_F(UpdaterTest, last_command_update) {
std::string block1(4096, '1');
std::string block2(4096, '2');
std::string block3(4096, '3');
std::string block1_hash = get_sha1(block1);
std::string block2_hash = get_sha1(block2);
std::string block3_hash = get_sha1(block3);
// Compose the transfer list to fail the first update.
std::vector<std::string> transfer_list_fail{
// clang-format off
"4",
"2",
"0",
"2",
"stash " + block1_hash + " 2,0,1",
"move " + block1_hash + " 2,1,2 1 2,0,1",
"stash " + block3_hash + " 2,2,3",
"fail",
// clang-format on
};
// Mimic a resumed update with the same transfer commands.
std::vector<std::string> transfer_list_continue{
// clang-format off
"4",
"2",
"0",
"2",
"stash " + block1_hash + " 2,0,1",
"move " + block1_hash + " 2,1,2 1 2,0,1",
"stash " + block3_hash + " 2,2,3",
"move " + block1_hash + " 2,2,3 1 2,0,1",
// clang-format on
};
ASSERT_TRUE(android::base::WriteStringToFile(block1 + block2 + block3, image_file_));
PackageEntries entries{
{ "new_data", "" },
{ "patch_data", "" },
{ "transfer_list", android::base::Join(transfer_list_fail, '\n') },
};
// "2\nstash " + block3_hash + " 2,2,3"
std::string last_command_content = "2\n" + transfer_list_fail[kTransferListHeaderLines + 2];
RunBlockImageUpdate(false, entries, image_file_, "");
// Expect last_command to contain the last stash command.
std::string last_command_actual;
ASSERT_TRUE(android::base::ReadFileToString(last_command_file_, &last_command_actual));
EXPECT_EQ(last_command_content, last_command_actual);
std::string updated_contents;
ASSERT_TRUE(android::base::ReadFileToString(image_file_, &updated_contents));
ASSERT_EQ(block1 + block1 + block3, updated_contents);
// "Resume" the update. Expect the first 'move' to be skipped but the second 'move' to be
// executed. Note that we intentionally reset the image file.
entries["transfer_list"] = android::base::Join(transfer_list_continue, '\n');
ASSERT_TRUE(android::base::WriteStringToFile(block1 + block2 + block3, image_file_));
RunBlockImageUpdate(false, entries, image_file_, "t");
ASSERT_TRUE(android::base::ReadFileToString(image_file_, &updated_contents));
ASSERT_EQ(block1 + block2 + block1, updated_contents);
}
TEST_F(UpdaterTest, last_command_update_unresumable) {
std::string block1(4096, '1');
std::string block2(4096, '2');
std::string block1_hash = get_sha1(block1);
std::string block2_hash = get_sha1(block2);
// Construct an unresumable update with source blocks mismatch.
std::vector<std::string> transfer_list_unresumable{
// clang-format off
"4",
"2",
"0",
"2",
"stash " + block1_hash + " 2,0,1",
"move " + block2_hash + " 2,1,2 1 2,0,1",
// clang-format on
};
PackageEntries entries{
{ "new_data", "" },
{ "patch_data", "" },
{ "transfer_list", android::base::Join(transfer_list_unresumable, '\n') },
};
ASSERT_TRUE(android::base::WriteStringToFile(block1 + block1, image_file_));
std::string last_command_content = "0\n" + transfer_list_unresumable[kTransferListHeaderLines];
ASSERT_TRUE(android::base::WriteStringToFile(last_command_content, last_command_file_));
RunBlockImageUpdate(false, entries, image_file_, "");
// The last_command_file will be deleted if the update encounters an unresumable failure later.
ASSERT_EQ(-1, access(last_command_file_.c_str(), R_OK));
}
TEST_F(UpdaterTest, last_command_verify) {
std::string block1(4096, '1');
std::string block2(4096, '2');
std::string block3(4096, '3');
std::string block1_hash = get_sha1(block1);
std::string block2_hash = get_sha1(block2);
std::string block3_hash = get_sha1(block3);
std::vector<std::string> transfer_list_verify{
// clang-format off
"4",
"2",
"0",
"2",
"stash " + block1_hash + " 2,0,1",
"move " + block1_hash + " 2,0,1 1 2,0,1",
"move " + block1_hash + " 2,1,2 1 2,0,1",
"stash " + block3_hash + " 2,2,3",
// clang-format on
};
PackageEntries entries{
{ "new_data", "" },
{ "patch_data", "" },
{ "transfer_list", android::base::Join(transfer_list_verify, '\n') },
};
ASSERT_TRUE(android::base::WriteStringToFile(block1 + block1 + block3, image_file_));
// Last command: "move " + block1_hash + " 2,1,2 1 2,0,1"
std::string last_command_content = "2\n" + transfer_list_verify[kTransferListHeaderLines + 2];
// First run: expect the verification to succeed and the last_command_file is intact.
ASSERT_TRUE(android::base::WriteStringToFile(last_command_content, last_command_file_));
RunBlockImageUpdate(true, entries, image_file_, "t");
std::string last_command_actual;
ASSERT_TRUE(android::base::ReadFileToString(last_command_file_, &last_command_actual));
EXPECT_EQ(last_command_content, last_command_actual);
// Second run with a mismatching block image: expect the verification to succeed but
// last_command_file to be deleted; because the target blocks in the last command don't have the
// expected contents for the second move command.
ASSERT_TRUE(android::base::WriteStringToFile(block1 + block2 + block3, image_file_));
RunBlockImageUpdate(true, entries, image_file_, "t");
ASSERT_EQ(-1, access(last_command_file_.c_str(), R_OK));
}
class ResumableUpdaterTest : public testing::TestWithParam<size_t> {
protected:
void SetUp() override {
RegisterBuiltins();
RegisterInstallFunctions();
RegisterBlockImageFunctions();
Paths::Get().set_cache_temp_source(temp_saved_source_.path);
Paths::Get().set_last_command_file(temp_last_command_.path);
Paths::Get().set_stash_directory_base(temp_stash_base_.path);
index_ = GetParam();
image_file_ = image_temp_file_.path;
last_command_file_ = temp_last_command_.path;
}
void TearDown() override {
// Clean up the last_command_file if any.
ASSERT_TRUE(android::base::RemoveFileIfExists(last_command_file_));
// Clear partition updated marker if any.
std::string updated_marker{ temp_stash_base_.path };
updated_marker += "/" + get_sha1(image_temp_file_.path) + ".UPDATED";
ASSERT_TRUE(android::base::RemoveFileIfExists(updated_marker));
}
TemporaryFile temp_saved_source_;
TemporaryDir temp_stash_base_;
std::string last_command_file_;
std::string image_file_;
size_t index_;
private:
TemporaryFile temp_last_command_;
TemporaryFile image_temp_file_;
};
static std::string g_source_image;
static std::string g_target_image;
static PackageEntries g_entries;
static std::vector<std::string> GenerateTransferList() {
std::string a(4096, 'a');
std::string b(4096, 'b');
std::string c(4096, 'c');
std::string d(4096, 'd');
std::string e(4096, 'e');
std::string f(4096, 'f');
std::string g(4096, 'g');
std::string h(4096, 'h');
std::string i(4096, 'i');
std::string zero(4096, '\0');
std::string a_hash = get_sha1(a);
std::string b_hash = get_sha1(b);
std::string c_hash = get_sha1(c);
std::string e_hash = get_sha1(e);
auto loc = [](const std::string& range_text) {
std::vector<std::string> pieces = android::base::Split(range_text, "-");
size_t left;
size_t right;
if (pieces.size() == 1) {
CHECK(android::base::ParseUint(pieces[0], &left));
right = left + 1;
} else {
CHECK_EQ(2u, pieces.size());
CHECK(android::base::ParseUint(pieces[0], &left));
CHECK(android::base::ParseUint(pieces[1], &right));
right++;
}
return android::base::StringPrintf("2,%zu,%zu", left, right);
};
// patch 1: "b d c" -> "g"
TemporaryFile patch_file_bdc_g;
std::string bdc = b + d + c;
std::string bdc_hash = get_sha1(bdc);
std::string g_hash = get_sha1(g);
CHECK_EQ(0, bsdiff::bsdiff(reinterpret_cast<const uint8_t*>(bdc.data()), bdc.size(),
reinterpret_cast<const uint8_t*>(g.data()), g.size(),
patch_file_bdc_g.path, nullptr));
std::string patch_bdc_g;
CHECK(android::base::ReadFileToString(patch_file_bdc_g.path, &patch_bdc_g));
// patch 2: "a b c d" -> "d c b"
TemporaryFile patch_file_abcd_dcb;
std::string abcd = a + b + c + d;
std::string abcd_hash = get_sha1(abcd);
std::string dcb = d + c + b;
std::string dcb_hash = get_sha1(dcb);
CHECK_EQ(0, bsdiff::bsdiff(reinterpret_cast<const uint8_t*>(abcd.data()), abcd.size(),
reinterpret_cast<const uint8_t*>(dcb.data()), dcb.size(),
patch_file_abcd_dcb.path, nullptr));
std::string patch_abcd_dcb;
CHECK(android::base::ReadFileToString(patch_file_abcd_dcb.path, &patch_abcd_dcb));
std::vector<std::string> transfer_list{
"4",
"10", // total blocks written
"2", // maximum stash entries
"2", // maximum number of stashed blocks
// a b c d e a b c d e
"stash " + b_hash + " " + loc("1"),
// a b c d e a b c d e [b(1)]
"stash " + c_hash + " " + loc("2"),
// a b c d e a b c d e [b(1)][c(2)]
"new " + loc("1-2"),
// a i h d e a b c d e [b(1)][c(2)]
"zero " + loc("0"),
// 0 i h d e a b c d e [b(1)][c(2)]
// bsdiff "b d c" (from stash, 3, stash) to get g(3)
android::base::StringPrintf(
"bsdiff 0 %zu %s %s %s 3 %s %s %s:%s %s:%s",
patch_bdc_g.size(), // patch start (0), patch length
bdc_hash.c_str(), // source hash
g_hash.c_str(), // target hash
loc("3").c_str(), // target range
loc("3").c_str(), loc("1").c_str(), // load "d" from block 3, into buffer at offset 1
b_hash.c_str(), loc("0").c_str(), // load "b" from stash, into buffer at offset 0
c_hash.c_str(), loc("2").c_str()), // load "c" from stash, into buffer at offset 2
// 0 i h g e a b c d e [b(1)][c(2)]
"free " + b_hash,
// 0 i h g e a b c d e [c(2)]
"free " + a_hash,
// 0 i h g e a b c d e
"stash " + a_hash + " " + loc("5"),
// 0 i h g e a b c d e [a(5)]
"move " + e_hash + " " + loc("5") + " 1 " + loc("4"),
// 0 i h g e e b c d e [a(5)]
// bsdiff "a b c d" (from stash, 6-8) to "d c b" (6-8)
android::base::StringPrintf( //
"bsdiff %zu %zu %s %s %s 4 %s %s %s:%s",
patch_bdc_g.size(), // patch start
patch_bdc_g.size() + patch_abcd_dcb.size(), // patch length
abcd_hash.c_str(), // source hash
dcb_hash.c_str(), // target hash
loc("6-8").c_str(), // target range
loc("6-8").c_str(), // load "b c d" from blocks 6-8
loc("1-3").c_str(), // into buffer at offset 1-3
a_hash.c_str(), // load "a" from stash
loc("0").c_str()), // into buffer at offset 0
// 0 i h g e e d c b e [a(5)]
"new " + loc("4"),
// 0 i h g f e d c b e [a(5)]
"move " + a_hash + " " + loc("9") + " 1 - " + a_hash + ":" + loc("0"),
// 0 i h g f e d c b a [a(5)]
"free " + a_hash,
// 0 i h g f e d c b a
};
std::string new_data = i + h + f;
std::string patch_data = patch_bdc_g + patch_abcd_dcb;
g_entries = {
{ "new_data", new_data },
{ "patch_data", patch_data },
};
g_source_image = a + b + c + d + e + a + b + c + d + e;
g_target_image = zero + i + h + g + f + e + d + c + b + a;
return transfer_list;
}
static const std::vector<std::string> g_transfer_list = GenerateTransferList();
INSTANTIATE_TEST_CASE_P(InterruptAfterEachCommand, ResumableUpdaterTest,
::testing::Range(static_cast<size_t>(0),
g_transfer_list.size() - kTransferListHeaderLines));
TEST_P(ResumableUpdaterTest, InterruptVerifyResume) {
ASSERT_TRUE(android::base::WriteStringToFile(g_source_image, image_file_));
LOG(INFO) << "Interrupting at line " << index_ << " ("
<< g_transfer_list[kTransferListHeaderLines + index_] << ")";
std::vector<std::string> transfer_list_copy{ g_transfer_list };
transfer_list_copy[kTransferListHeaderLines + index_] = "fail";
g_entries["transfer_list"] = android::base::Join(transfer_list_copy, '\n');
// Run update that's expected to fail.
RunBlockImageUpdate(false, g_entries, image_file_, "");
std::string last_command_expected;
// Assert the last_command_file.
if (index_ == 0) {
ASSERT_EQ(-1, access(last_command_file_.c_str(), R_OK));
} else {
last_command_expected =
std::to_string(index_ - 1) + "\n" + g_transfer_list[kTransferListHeaderLines + index_ - 1];
std::string last_command_actual;
ASSERT_TRUE(android::base::ReadFileToString(last_command_file_, &last_command_actual));
ASSERT_EQ(last_command_expected, last_command_actual);
}
g_entries["transfer_list"] = android::base::Join(g_transfer_list, '\n');
// Resume the interrupted update, by doing verification first.
RunBlockImageUpdate(true, g_entries, image_file_, "t");
// last_command_file should remain intact.
if (index_ == 0) {
ASSERT_EQ(-1, access(last_command_file_.c_str(), R_OK));
} else {
std::string last_command_actual;
ASSERT_TRUE(android::base::ReadFileToString(last_command_file_, &last_command_actual));
ASSERT_EQ(last_command_expected, last_command_actual);
}
// Resume the update.
RunBlockImageUpdate(false, g_entries, image_file_, "t");
// last_command_file should be gone after successful update.
ASSERT_EQ(-1, access(last_command_file_.c_str(), R_OK));
std::string updated_image_actual;
ASSERT_TRUE(android::base::ReadFileToString(image_file_, &updated_image_actual));
ASSERT_EQ(g_target_image, updated_image_actual);
}
