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/*
* Copyright (C) 2019 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 "updater/dynamic_partitions.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <memory>
#include <string>
#include <vector>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/strings.h>
#include "edify/expr.h"
#include "edify/updater_runtime_interface.h"
#include "otautil/error_code.h"
#include "otautil/paths.h"
#include "private/utils.h"
static std::vector<std::string> ReadStringArgs(const char* name, State* state,
const std::vector<std::unique_ptr<Expr>>& argv,
const std::vector<std::string>& arg_names) {
if (argv.size() != arg_names.size()) {
ErrorAbort(state, kArgsParsingFailure, "%s expects %zu arguments, got %zu", name,
arg_names.size(), argv.size());
return {};
}
std::vector<std::unique_ptr<Value>> args;
if (!ReadValueArgs(state, argv, &args)) {
return {};
}
CHECK_EQ(args.size(), arg_names.size());
for (size_t i = 0; i < arg_names.size(); ++i) {
if (args[i]->type != Value::Type::STRING) {
ErrorAbort(state, kArgsParsingFailure, "%s argument to %s must be string",
arg_names[i].c_str(), name);
return {};
}
}
std::vector<std::string> ret;
std::transform(args.begin(), args.end(), std::back_inserter(ret),
[](const auto& arg) { return arg->data; });
return ret;
}
Value* UnmapPartitionFn(const char* name, State* state,
const std::vector<std::unique_ptr<Expr>>& argv) {
auto args = ReadStringArgs(name, state, argv, { "name" });
if (args.empty()) return StringValue("");
auto updater_runtime = state->updater->GetRuntime();
return updater_runtime->UnmapPartitionOnDeviceMapper(args[0]) ? StringValue("t")
: StringValue("");
}
Value* MapPartitionFn(const char* name, State* state,
const std::vector<std::unique_ptr<Expr>>& argv) {
auto args = ReadStringArgs(name, state, argv, { "name" });
if (args.empty()) return StringValue("");
std::string path;
auto updater_runtime = state->updater->GetRuntime();
bool result = updater_runtime->MapPartitionOnDeviceMapper(args[0], &path);
return result ? StringValue(path) : StringValue("");
}
static constexpr char kMetadataUpdatedMarker[] = "/dynamic_partition_metadata.UPDATED";
Value* UpdateDynamicPartitionsFn(const char* name, State* state,
const std::vector<std::unique_ptr<Expr>>& argv) {
if (argv.size() != 1) {
ErrorAbort(state, kArgsParsingFailure, "%s expects 1 arguments, got %zu", name, argv.size());
return StringValue("");
}
std::vector<std::unique_ptr<Value>> args;
if (!ReadValueArgs(state, argv, &args)) {
return nullptr;
}
const std::unique_ptr<Value>& op_list_value = args[0];
if (op_list_value->type != Value::Type::BLOB) {
ErrorAbort(state, kArgsParsingFailure, "op_list argument to %s must be blob", name);
return StringValue("");
}
std::string updated_marker = Paths::Get().stash_directory_base() + kMetadataUpdatedMarker;
if (state->is_retry) {
struct stat sb;
int result = stat(updated_marker.c_str(), &sb);
if (result == 0) {
LOG(INFO) << "Skipping already updated dynamic partition metadata based on marker";
return StringValue("t");
}
} else {
// Delete the obsolete marker if any.
std::string err;
if (!android::base::RemoveFileIfExists(updated_marker, &err)) {
LOG(ERROR) << "Failed to remove dynamic partition metadata updated marker " << updated_marker
<< ": " << err;
return StringValue("");
}
}
auto updater_runtime = state->updater->GetRuntime();
if (!updater_runtime->UpdateDynamicPartitions(op_list_value->data)) {
return StringValue("");
}
if (!SetUpdatedMarker(updated_marker)) {
LOG(ERROR) << "Failed to set metadata updated marker.";
return StringValue("");
}
return StringValue("t");
}
void RegisterDynamicPartitionsFunctions() {
RegisterFunction("unmap_partition", UnmapPartitionFn);
RegisterFunction("map_partition", MapPartitionFn);
RegisterFunction("update_dynamic_partitions", UpdateDynamicPartitionsFn);
}
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