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-rw-r--r--usb/usb/UsbDataSessionMonitor.h114
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diff --git a/usb/usb/UsbDataSessionMonitor.h b/usb/usb/UsbDataSessionMonitor.h
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--- a/usb/usb/UsbDataSessionMonitor.h
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-/*
- * Copyright (C) 2023 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 <aidl/android/hardware/usb/ComplianceWarning.h>
-#include <aidl/android/hardware/usb/PortDataRole.h>
-#include <android-base/chrono_utils.h>
-#include <android-base/unique_fd.h>
-
-#include <set>
-#include <string>
-#include <vector>
-
-namespace aidl {
-namespace android {
-namespace hardware {
-namespace usb {
-
-using ::aidl::android::hardware::usb::ComplianceWarning;
-using ::aidl::android::hardware::usb::PortDataRole;
-using ::android::base::boot_clock;
-using ::android::base::unique_fd;
-
-/*
- * UsbDataSessionMonitor monitors the usb device state sysfs of 3 different usb devices
- * including device mode (udc), host mode high-speed port and host mode super-speed port. It
- * reports Suez metrics for each data session and also provides API to query the compliance
- * warnings detected in the current usb data session.
- */
-class UsbDataSessionMonitor {
- public:
- /*
- * The host mode high-speed port and super-speed port can be assigned to either host1 or
- * host2 without affecting functionality.
- *
- * UeventRegex: name regex of the device that's being monitored. The regex is matched against
- * uevent to detect dynamic creation/deletion/change of the device.
- * StatePath: usb device state sysfs path of the device, monitored by epoll.
- * dataRolePath: path to the usb data role sysfs, monitored by epoll.
- * updatePortStatusCb: the callback is invoked when the compliance warings changes.
- */
- UsbDataSessionMonitor(const std::string &deviceUeventRegex, const std::string &deviceStatePath,
- const std::string &host1UeventRegex, const std::string &host1StatePath,
- const std::string &host2UeventRegex, const std::string &host2StatePath,
- const std::string &dataRolePath,
- std::function<void()> updatePortStatusCb);
- ~UsbDataSessionMonitor();
- // Returns the compliance warnings detected in the current data session.
- void getComplianceWarnings(const PortDataRole &role, std::vector<ComplianceWarning> *warnings);
-
- private:
- struct usbDeviceState {
- unique_fd fd;
- std::string filePath;
- std::string ueventRegex;
- // Usb device states reported by state sysfs
- std::vector<std::string> states;
- // Timestamps of when the usb device states were captured
- std::vector<boot_clock::time_point> timestamps;
- };
-
- static void *monitorThread(void *param);
- void handleUevent();
- void handleDataRoleEvent();
- void handleDeviceStateEvent(struct usbDeviceState *deviceState);
- void clearDeviceStateEvents(struct usbDeviceState *deviceState);
- void reportUsbDataSessionMetrics();
- void evaluateComplianceWarning();
- void notifyComplianceWarning();
- void updateUdcBindStatus(const std::string &devname);
-
- pthread_t mMonitor;
- unique_fd mEpollFd;
- unique_fd mUeventFd;
- unique_fd mDataRoleFd;
- struct usbDeviceState mDeviceState;
- struct usbDeviceState mHost1State;
- struct usbDeviceState mHost2State;
- std::set<ComplianceWarning> mWarningSet;
- // Callback function to notify the caller when there's a change in compliance warnings.
- std::function<void()> mUpdatePortStatusCb;
- /*
- * Cache relevant info for a USB data session when one starts, including
- * the data role and the time when the session starts.
- */
- PortDataRole mDataRole;
- boot_clock::time_point mDataSessionStart;
- /*
- * In gadget mode: this indicates whether the udc device is bound to the configfs driver, which
- * is done by userspace writing the udc device name to /config/usb_gadget/g1/UDC. When unbound,
- * the gadget is in soft pulldown state and is expected not to enumerate. During gadget
- * function switch, the udc device usually go through unbind and bind.
- */
- bool mUdcBind;
-};
-
-} // namespace usb
-} // namespace hardware
-} // namespace android
-} // namespace aidl