09f98e2ed6
3e5743c521
Bug: 297224564
Bug: 296119135
Change-Id: I4fc7da8c628292bb2c702c6fd3f059202e6ca82b
114 lines
4.5 KiB
C++
114 lines
4.5 KiB
C++
/*
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <aidl/android/hardware/usb/ComplianceWarning.h>
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#include <aidl/android/hardware/usb/PortDataRole.h>
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#include <android-base/chrono_utils.h>
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#include <android-base/unique_fd.h>
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#include <set>
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#include <string>
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#include <vector>
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namespace aidl {
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namespace android {
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namespace hardware {
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namespace usb {
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using ::aidl::android::hardware::usb::ComplianceWarning;
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using ::aidl::android::hardware::usb::PortDataRole;
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using ::android::base::boot_clock;
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using ::android::base::unique_fd;
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/*
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* UsbDataSessionMonitor monitors the usb device state sysfs of 3 different usb devices
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* including device mode (udc), host mode high-speed port and host mode super-speed port. It
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* reports Suez metrics for each data session and also provides API to query the compliance
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* warnings detected in the current usb data session.
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*/
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class UsbDataSessionMonitor {
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public:
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/*
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* The host mode high-speed port and super-speed port can be assigned to either host1 or
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* host2 without affecting functionality.
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*
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* UeventRegex: name regex of the device that's being monitored. The regex is matched against
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* uevent to detect dynamic creation/deletion/change of the device.
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* StatePath: usb device state sysfs path of the device, monitored by epoll.
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* dataRolePath: path to the usb data role sysfs, monitored by epoll.
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* updatePortStatusCb: the callback is invoked when the compliance warings changes.
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*/
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UsbDataSessionMonitor(const std::string &deviceUeventRegex, const std::string &deviceStatePath,
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const std::string &host1UeventRegex, const std::string &host1StatePath,
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const std::string &host2UeventRegex, const std::string &host2StatePath,
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const std::string &dataRolePath,
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std::function<void()> updatePortStatusCb);
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~UsbDataSessionMonitor();
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// Returns the compliance warnings detected in the current data session.
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void getComplianceWarnings(const PortDataRole &role, std::vector<ComplianceWarning> *warnings);
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private:
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struct usbDeviceState {
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unique_fd fd;
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std::string filePath;
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std::string ueventRegex;
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// Usb device states reported by state sysfs
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std::vector<std::string> states;
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// Timestamps of when the usb device states were captured
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std::vector<boot_clock::time_point> timestamps;
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};
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static void *monitorThread(void *param);
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void handleUevent();
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void handleDataRoleEvent();
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void handleDeviceStateEvent(struct usbDeviceState *deviceState);
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void clearDeviceStateEvents(struct usbDeviceState *deviceState);
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void reportUsbDataSessionMetrics();
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void evaluateComplianceWarning();
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void notifyComplianceWarning();
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void updateUdcBindStatus(const std::string &devname);
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pthread_t mMonitor;
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unique_fd mEpollFd;
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unique_fd mUeventFd;
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unique_fd mDataRoleFd;
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struct usbDeviceState mDeviceState;
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struct usbDeviceState mHost1State;
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struct usbDeviceState mHost2State;
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std::set<ComplianceWarning> mWarningSet;
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// Callback function to notify the caller when there's a change in compliance warnings.
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std::function<void()> mUpdatePortStatusCb;
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/*
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* Cache relevant info for a USB data session when one starts, including
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* the data role and the time when the session starts.
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*/
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PortDataRole mDataRole;
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boot_clock::time_point mDataSessionStart;
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/*
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* In gadget mode: this indicates whether the udc device is bound to the configfs driver, which
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* is done by userspace writing the udc device name to /config/usb_gadget/g1/UDC. When unbound,
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* the gadget is in soft pulldown state and is expected not to enumerate. During gadget
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* function switch, the udc device usually go through unbind and bind.
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*/
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bool mUdcBind;
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};
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} // namespace usb
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} // namespace hardware
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} // namespace android
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} // namespace aidl
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