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platform_system_core/fastboot/fastboot_driver.h
Yifan Hong bcd2770207 fastboot driver: add fetch command in driver 
The `fastboot fetch` command is a wrapper around
the fetch protocol. It:

- getvar max-fetch-size
- get the size of the partition
- read the data by chunks, chunk size = max-fetch-size.

The name of the partition is passed directly to the device
(with the usual has-slot magic for flashing etc.) If we support
fetching partitions other than vendor_boot in the future, no change
in the driver is needed.

Bug: 173654501
Test: manual

Change-Id: Ie576eea668234df236b096a372e65c5e91c1e48c
2021-03-17 15:38:06 -07:00

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/*
* Copyright (C) 2018 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#pragma once
#include <cstdlib>
#include <deque>
#include <limits>
#include <string>
#include <vector>
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <android-base/unique_fd.h>
#include <bootimg.h>
#include <inttypes.h>
#include <sparse/sparse.h>
#include "constants.h"
#include "transport.h"
class Transport;
namespace fastboot {
enum RetCode : int {
SUCCESS = 0,
BAD_ARG,
IO_ERROR,
BAD_DEV_RESP,
DEVICE_FAIL,
TIMEOUT,
};
struct DriverCallbacks {
std::function<void(const std::string&)> prolog = [](const std::string&) {};
std::function<void(int)> epilog = [](int) {};
std::function<void(const std::string&)> info = [](const std::string&) {};
};
class FastBootDriver {
friend class FastBootTest;
public:
static constexpr int RESP_TIMEOUT = 30; // 30 seconds
static constexpr uint32_t MAX_DOWNLOAD_SIZE = std::numeric_limits<uint32_t>::max();
static constexpr size_t TRANSPORT_CHUNK_SIZE = 1024;
FastBootDriver(Transport* transport, DriverCallbacks driver_callbacks = {},
bool no_checks = false);
~FastBootDriver();
RetCode Boot(std::string* response = nullptr, std::vector<std::string>* info = nullptr);
RetCode Continue(std::string* response = nullptr, std::vector<std::string>* info = nullptr);
RetCode CreatePartition(const std::string& partition, const std::string& size);
RetCode DeletePartition(const std::string& partition);
RetCode Download(const std::string& name, int fd, size_t size, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode Download(int fd, size_t size, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode Download(const std::string& name, const std::vector<char>& buf,
std::string* response = nullptr, std::vector<std::string>* info = nullptr);
RetCode Download(const std::vector<char>& buf, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode Download(const std::string& partition, struct sparse_file* s, uint32_t sz,
size_t current, size_t total, bool use_crc, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode Download(sparse_file* s, bool use_crc = false, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode Erase(const std::string& partition, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode Flash(const std::string& partition, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode GetVar(const std::string& key, std::string* val,
std::vector<std::string>* info = nullptr);
RetCode GetVarAll(std::vector<std::string>* response);
RetCode Reboot(std::string* response = nullptr, std::vector<std::string>* info = nullptr);
RetCode RebootTo(std::string target, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode ResizePartition(const std::string& partition, const std::string& size);
RetCode SetActive(const std::string& slot, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode Upload(const std::string& outfile, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode SnapshotUpdateCommand(const std::string& command, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode FetchToFd(const std::string& partition, android::base::borrowed_fd fd,
int64_t offset = -1, int64_t size = -1, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
/* HIGHER LEVEL COMMANDS -- Composed of the commands above */
RetCode FlashPartition(const std::string& partition, const std::vector<char>& data);
RetCode FlashPartition(const std::string& partition, int fd, uint32_t sz);
RetCode FlashPartition(const std::string& partition, sparse_file* s, uint32_t sz,
size_t current, size_t total);
RetCode Partitions(std::vector<std::tuple<std::string, uint64_t>>* partitions);
RetCode Require(const std::string& var, const std::vector<std::string>& allowed, bool* reqmet,
bool invert = false);
/* HELPERS */
void SetInfoCallback(std::function<void(const std::string&)> info);
static const std::string RCString(RetCode rc);
std::string Error();
RetCode WaitForDisconnect();
// Note: set_transport will return the previous transport.
Transport* set_transport(Transport* transport);
Transport* transport() const { return transport_; }
RetCode RawCommand(const std::string& cmd, const std::string& message,
std::string* response = nullptr, std::vector<std::string>* info = nullptr,
int* dsize = nullptr);
RetCode RawCommand(const std::string& cmd, std::string* response = nullptr,
std::vector<std::string>* info = nullptr, int* dsize = nullptr);
protected:
RetCode DownloadCommand(uint32_t size, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode HandleResponse(std::string* response = nullptr,
std::vector<std::string>* info = nullptr, int* dsize = nullptr);
std::string ErrnoStr(const std::string& msg);
Transport* transport_;
private:
RetCode SendBuffer(int fd, size_t size);
RetCode SendBuffer(const std::vector<char>& buf);
RetCode SendBuffer(const void* buf, size_t size);
RetCode ReadBuffer(void* buf, size_t size);
RetCode UploadInner(const std::string& outfile, std::string* response = nullptr,
std::vector<std::string>* info = nullptr);
RetCode RunAndReadBuffer(const std::string& cmd, std::string* response,
std::vector<std::string>* info,
const std::function<RetCode(const char*, uint64_t)>& write_fn);
int SparseWriteCallback(std::vector<char>& tpbuf, const char* data, size_t len);
std::string error_;
std::function<void(const std::string&)> prolog_;
std::function<void(int)> epilog_;
std::function<void(const std::string&)> info_;
bool disable_checks_;
};
} // namespace fastboot
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