Steven Moreland | fe66b73 | 2019-02-01 14:29:45 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 17 | #define LOG_TAG "hwservicemanager" |
| 18 | |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 19 | #include "ServiceManager.h" |
Steven Moreland | 37aed80 | 2017-04-06 09:16:42 -0700 | [diff] [blame] | 20 | #include "Vintf.h" |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 21 | |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 22 | #include <android-base/logging.h> |
Steven Moreland | 5a31745 | 2017-10-05 18:49:48 -0700 | [diff] [blame] | 23 | #include <android-base/properties.h> |
Steven Moreland | cdf9472 | 2017-03-21 12:16:31 -0700 | [diff] [blame] | 24 | #include <hwbinder/IPCThreadState.h> |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 25 | #include <hidl/HidlSupport.h> |
Steven Moreland | 6f4fbe1 | 2017-07-21 18:07:42 -0700 | [diff] [blame] | 26 | #include <hidl/HidlTransportSupport.h> |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 27 | #include <regex> |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 28 | #include <sstream> |
Steven Moreland | 58cef2c | 2018-01-24 16:41:38 -0800 | [diff] [blame] | 29 | #include <thread> |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 30 | |
Steven Moreland | cdf9472 | 2017-03-21 12:16:31 -0700 | [diff] [blame] | 31 | using android::hardware::IPCThreadState; |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 32 | using ::android::hardware::interfacesEqual; |
Steven Moreland | cdf9472 | 2017-03-21 12:16:31 -0700 | [diff] [blame] | 33 | |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 34 | namespace android { |
| 35 | namespace hidl { |
| 36 | namespace manager { |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 37 | namespace implementation { |
| 38 | |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 39 | AccessControl::CallingContext getBinderCallingContext() { |
| 40 | const auto& self = IPCThreadState::self(); |
| 41 | |
| 42 | pid_t pid = self->getCallingPid(); |
| 43 | const char* sid = self->getCallingSid(); |
| 44 | |
| 45 | if (sid == nullptr) { |
| 46 | if (pid != getpid()) { |
| 47 | android_errorWriteLog(0x534e4554, "121035042"); |
| 48 | } |
| 49 | |
| 50 | return AccessControl::getCallingContext(pid); |
| 51 | } else { |
| 52 | return { true, sid, pid }; |
| 53 | } |
| 54 | } |
| 55 | |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 56 | static constexpr uint64_t kServiceDiedCookie = 0; |
| 57 | static constexpr uint64_t kPackageListenerDiedCookie = 1; |
| 58 | static constexpr uint64_t kServiceListenerDiedCookie = 2; |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 59 | static constexpr uint64_t kClientCallbackDiedCookie = 3; |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 60 | |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 61 | size_t ServiceManager::countExistingService() const { |
| 62 | size_t total = 0; |
| 63 | forEachExistingService([&] (const HidlService *) { |
| 64 | ++total; |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 65 | return true; // continue |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 66 | }); |
| 67 | return total; |
| 68 | } |
| 69 | |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 70 | void ServiceManager::forEachExistingService(std::function<bool(const HidlService *)> f) const { |
| 71 | forEachServiceEntry([&] (const HidlService *service) { |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 72 | if (service->getService() == nullptr) { |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 73 | return true; // continue |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 74 | } |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 75 | return f(service); |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 76 | }); |
| 77 | } |
| 78 | |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 79 | void ServiceManager::forEachExistingService(std::function<bool(HidlService *)> f) { |
| 80 | forEachServiceEntry([&] (HidlService *service) { |
| 81 | if (service->getService() == nullptr) { |
| 82 | return true; // continue |
| 83 | } |
| 84 | return f(service); |
| 85 | }); |
| 86 | } |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 87 | |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 88 | void ServiceManager::forEachServiceEntry(std::function<bool(const HidlService *)> f) const { |
| 89 | for (const auto& interfaceMapping : mServiceMap) { |
| 90 | const auto& instanceMap = interfaceMapping.second.getInstanceMap(); |
| 91 | |
| 92 | for (const auto& instanceMapping : instanceMap) { |
| 93 | if (!f(instanceMapping.second.get())) { |
| 94 | return; |
| 95 | } |
| 96 | } |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | void ServiceManager::forEachServiceEntry(std::function<bool(HidlService *)> f) { |
| 101 | for (auto& interfaceMapping : mServiceMap) { |
| 102 | auto& instanceMap = interfaceMapping.second.getInstanceMap(); |
| 103 | |
| 104 | for (auto& instanceMapping : instanceMap) { |
| 105 | if (!f(instanceMapping.second.get())) { |
| 106 | return; |
| 107 | } |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 108 | } |
| 109 | } |
| 110 | } |
| 111 | |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 112 | HidlService* ServiceManager::lookup(const std::string& fqName, const std::string& name) { |
| 113 | auto ifaceIt = mServiceMap.find(fqName); |
| 114 | if (ifaceIt == mServiceMap.end()) { |
| 115 | return nullptr; |
| 116 | } |
| 117 | |
| 118 | PackageInterfaceMap &ifaceMap = ifaceIt->second; |
| 119 | |
| 120 | HidlService *hidlService = ifaceMap.lookup(name); |
| 121 | |
| 122 | return hidlService; |
| 123 | } |
| 124 | |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 125 | void ServiceManager::serviceDied(uint64_t cookie, const wp<IBase>& who) { |
Steven Moreland | 3af80b9 | 2018-05-09 15:31:18 -0700 | [diff] [blame] | 126 | bool serviceRemoved = false; |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 127 | switch (cookie) { |
| 128 | case kServiceDiedCookie: |
Steven Moreland | 3af80b9 | 2018-05-09 15:31:18 -0700 | [diff] [blame] | 129 | serviceRemoved = removeService(who, nullptr /* restrictToInstanceName */); |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 130 | break; |
| 131 | case kPackageListenerDiedCookie: |
Steven Moreland | 3af80b9 | 2018-05-09 15:31:18 -0700 | [diff] [blame] | 132 | serviceRemoved = removePackageListener(who); |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 133 | break; |
| 134 | case kServiceListenerDiedCookie: |
Steven Moreland | 3af80b9 | 2018-05-09 15:31:18 -0700 | [diff] [blame] | 135 | serviceRemoved = removeServiceListener(who); |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 136 | break; |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 137 | case kClientCallbackDiedCookie: { |
| 138 | sp<IBase> base = who.promote(); |
| 139 | IClientCallback* callback = static_cast<IClientCallback*>(base.get()); |
| 140 | serviceRemoved = unregisterClientCallback(nullptr /*service*/, |
| 141 | sp<IClientCallback>(callback)); |
| 142 | } break; |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 143 | } |
Steven Moreland | 3af80b9 | 2018-05-09 15:31:18 -0700 | [diff] [blame] | 144 | |
| 145 | if (!serviceRemoved) { |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 146 | LOG(ERROR) << "Received death notification but interface instance not removed. Cookie: " |
| 147 | << cookie << " Service pointer: " << who.promote().get(); |
Steven Moreland | 3af80b9 | 2018-05-09 15:31:18 -0700 | [diff] [blame] | 148 | } |
Martijn Coenen | 46847a6 | 2016-12-19 05:36:12 +0100 | [diff] [blame] | 149 | } |
| 150 | |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 151 | ServiceManager::InstanceMap &ServiceManager::PackageInterfaceMap::getInstanceMap() { |
| 152 | return mInstanceMap; |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 153 | } |
| 154 | |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 155 | const ServiceManager::InstanceMap &ServiceManager::PackageInterfaceMap::getInstanceMap() const { |
| 156 | return mInstanceMap; |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 159 | const HidlService *ServiceManager::PackageInterfaceMap::lookup( |
| 160 | const std::string &name) const { |
| 161 | auto it = mInstanceMap.find(name); |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 162 | |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 163 | if (it == mInstanceMap.end()) { |
| 164 | return nullptr; |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 165 | } |
| 166 | |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 167 | return it->second.get(); |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 168 | } |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 169 | |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 170 | HidlService *ServiceManager::PackageInterfaceMap::lookup( |
| 171 | const std::string &name) { |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 172 | |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 173 | return const_cast<HidlService*>( |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 174 | const_cast<const PackageInterfaceMap*>(this)->lookup(name)); |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | void ServiceManager::PackageInterfaceMap::insertService( |
| 178 | std::unique_ptr<HidlService> &&service) { |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 179 | mInstanceMap.insert({service->getInstanceName(), std::move(service)}); |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | void ServiceManager::PackageInterfaceMap::sendPackageRegistrationNotification( |
| 183 | const hidl_string &fqName, |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 184 | const hidl_string &instanceName) { |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 185 | |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 186 | for (auto it = mPackageListeners.begin(); it != mPackageListeners.end();) { |
| 187 | auto ret = (*it)->onRegistration(fqName, instanceName, false /* preexisting */); |
| 188 | if (ret.isOk()) { |
| 189 | ++it; |
| 190 | } else { |
| 191 | LOG(ERROR) << "Dropping registration callback for " << fqName << "/" << instanceName |
| 192 | << ": transport error."; |
| 193 | it = mPackageListeners.erase(it); |
| 194 | } |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 195 | } |
| 196 | } |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 197 | |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 198 | void ServiceManager::PackageInterfaceMap::addPackageListener(sp<IServiceNotification> listener) { |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 199 | for (const auto &instanceMapping : mInstanceMap) { |
| 200 | const std::unique_ptr<HidlService> &service = instanceMapping.second; |
| 201 | |
| 202 | if (service->getService() == nullptr) { |
| 203 | continue; |
| 204 | } |
| 205 | |
Steven Moreland | 30acc22 | 2017-01-26 11:44:38 -0800 | [diff] [blame] | 206 | auto ret = listener->onRegistration( |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 207 | service->getInterfaceName(), |
| 208 | service->getInstanceName(), |
| 209 | true /* preexisting */); |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 210 | if (!ret.isOk()) { |
| 211 | LOG(ERROR) << "Not adding package listener for " << service->getInterfaceName() |
| 212 | << "/" << service->getInstanceName() << ": transport error " |
| 213 | << "when sending notification for already registered instance."; |
| 214 | return; |
| 215 | } |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 216 | } |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 217 | mPackageListeners.push_back(listener); |
| 218 | } |
| 219 | |
| 220 | bool ServiceManager::PackageInterfaceMap::removePackageListener(const wp<IBase>& who) { |
| 221 | bool found = false; |
| 222 | |
| 223 | for (auto it = mPackageListeners.begin(); it != mPackageListeners.end();) { |
Steven Moreland | 6f4fbe1 | 2017-07-21 18:07:42 -0700 | [diff] [blame] | 224 | if (interfacesEqual(*it, who.promote())) { |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 225 | it = mPackageListeners.erase(it); |
| 226 | found = true; |
| 227 | } else { |
| 228 | ++it; |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | return found; |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 233 | } |
| 234 | |
Steven Moreland | 6f4fbe1 | 2017-07-21 18:07:42 -0700 | [diff] [blame] | 235 | bool ServiceManager::PackageInterfaceMap::removeServiceListener(const wp<IBase>& who) { |
Steven Moreland | 6f4fbe1 | 2017-07-21 18:07:42 -0700 | [diff] [blame] | 236 | bool found = false; |
| 237 | |
| 238 | for (auto &servicePair : getInstanceMap()) { |
| 239 | const std::unique_ptr<HidlService> &service = servicePair.second; |
| 240 | found |= service->removeListener(who); |
| 241 | } |
| 242 | |
| 243 | return found; |
| 244 | } |
| 245 | |
Steven Moreland | 5a31745 | 2017-10-05 18:49:48 -0700 | [diff] [blame] | 246 | static void tryStartService(const std::string& fqName, const std::string& name) { |
| 247 | using ::android::base::SetProperty; |
| 248 | |
Steven Moreland | cdd252f | 2019-07-15 15:18:07 -0700 | [diff] [blame] | 249 | // The "happy path" here is starting up a service that is configured as a |
| 250 | // lazy HAL, but we aren't sure that is the case. If the service doesn't |
| 251 | // have an 'interface' entry in its .rc file OR if the service is already |
| 252 | // running, then this will be a no-op. So, for instance, if a service is |
| 253 | // deadlocked during startup, you will see this message repeatedly. |
| 254 | LOG(INFO) << "Since " << fqName << "/" << name |
| 255 | << " is not registered, trying to start it as a lazy HAL."; |
| 256 | |
Steven Moreland | 58cef2c | 2018-01-24 16:41:38 -0800 | [diff] [blame] | 257 | std::thread([=] { |
Steven Moreland | 52fde21 | 2019-08-27 14:52:24 -0700 | [diff] [blame] | 258 | (void)SetProperty("ctl.interface_start", fqName + "/" + name); |
Steven Moreland | 58cef2c | 2018-01-24 16:41:38 -0800 | [diff] [blame] | 259 | }).detach(); |
Steven Moreland | 5a31745 | 2017-10-05 18:49:48 -0700 | [diff] [blame] | 260 | } |
| 261 | |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 262 | // Methods from ::android::hidl::manager::V1_0::IServiceManager follow. |
Steven Moreland | 5a31745 | 2017-10-05 18:49:48 -0700 | [diff] [blame] | 263 | Return<sp<IBase>> ServiceManager::get(const hidl_string& hidlFqName, |
| 264 | const hidl_string& hidlName) { |
| 265 | const std::string fqName = hidlFqName; |
| 266 | const std::string name = hidlName; |
| 267 | |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 268 | if (!mAcl.canGet(fqName, getBinderCallingContext())) { |
Martijn Coenen | 7ce83be | 2017-04-07 16:19:32 -0700 | [diff] [blame] | 269 | return nullptr; |
| 270 | } |
| 271 | |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 272 | HidlService* hidlService = lookup(fqName, name); |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 273 | if (hidlService == nullptr) { |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 274 | tryStartService(fqName, name); |
Martijn Coenen | 7b02bf9 | 2017-01-02 15:17:58 +0100 | [diff] [blame] | 275 | return nullptr; |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 276 | } |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 277 | |
Steven Moreland | 5a31745 | 2017-10-05 18:49:48 -0700 | [diff] [blame] | 278 | sp<IBase> service = hidlService->getService(); |
| 279 | if (service == nullptr) { |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 280 | tryStartService(fqName, name); |
Steven Moreland | 5a31745 | 2017-10-05 18:49:48 -0700 | [diff] [blame] | 281 | return nullptr; |
| 282 | } |
| 283 | |
Steven Moreland | 98db829 | 2018-12-07 13:08:25 -0800 | [diff] [blame] | 284 | // Let HidlService know that we handed out a client. If the client drops the service before the |
| 285 | // next time handleClientCallbacks is called, it will still know that the service had been handed out. |
| 286 | hidlService->guaranteeClient(); |
Peter Kalauskas | 85c2f4e | 2020-06-17 10:51:14 -0700 | [diff] [blame] | 287 | forEachExistingService([&] (HidlService *otherService) { |
| 288 | if (otherService != hidlService && interfacesEqual(service, otherService->getService())) { |
| 289 | otherService->guaranteeClient(); |
| 290 | } |
| 291 | return true; |
| 292 | }); |
Steven Moreland | 98db829 | 2018-12-07 13:08:25 -0800 | [diff] [blame] | 293 | |
Steven Moreland | c06af8d | 2018-10-22 16:35:07 -0700 | [diff] [blame] | 294 | // This is executed immediately after the binder driver confirms the transaction. The driver |
| 295 | // will update the appropriate data structures to reflect the fact that the client now has the |
| 296 | // service this function is returning. Nothing else can update the HidlService at the same |
| 297 | // time. This will run before anything else can modify the HidlService which is owned by this |
| 298 | // object, so it will be in the same state that it was when this function returns. |
| 299 | hardware::addPostCommandTask([hidlService] { |
Steven Moreland | 105c58b | 2020-04-06 16:18:50 -0700 | [diff] [blame] | 300 | hidlService->handleClientCallbacks(false /* isCalledOnInterval */, 1 /*knownClientCount*/); |
Steven Moreland | c06af8d | 2018-10-22 16:35:07 -0700 | [diff] [blame] | 301 | }); |
| 302 | |
Steven Moreland | 5a31745 | 2017-10-05 18:49:48 -0700 | [diff] [blame] | 303 | return service; |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 304 | } |
| 305 | |
Martijn Coenen | 1a5da1c | 2017-03-06 13:05:39 +0100 | [diff] [blame] | 306 | Return<bool> ServiceManager::add(const hidl_string& name, const sp<IBase>& service) { |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 307 | bool addSuccess = false; |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 308 | |
Martijn Coenen | 1a5da1c | 2017-03-06 13:05:39 +0100 | [diff] [blame] | 309 | if (service == nullptr) { |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 310 | return false; |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 311 | } |
Steven Moreland | 5fb3d65 | 2016-11-03 13:45:18 -0700 | [diff] [blame] | 312 | |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 313 | auto pidcon = getBinderCallingContext(); |
Steven Moreland | cdf9472 | 2017-03-21 12:16:31 -0700 | [diff] [blame] | 314 | |
Steven Moreland | c86f117 | 2019-05-14 13:19:21 -0700 | [diff] [blame] | 315 | if (!mAcl.canAdd(IBase::descriptor, pidcon)) { |
| 316 | LOG(ERROR) << "Missing permissions to add IBase"; |
| 317 | return false; |
| 318 | } |
| 319 | |
Martijn Coenen | 1a5da1c | 2017-03-06 13:05:39 +0100 | [diff] [blame] | 320 | auto ret = service->interfaceChain([&](const auto &interfaceChain) { |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 321 | addSuccess = addImpl(name, service, interfaceChain, pidcon); |
Martijn Coenen | 1a5da1c | 2017-03-06 13:05:39 +0100 | [diff] [blame] | 322 | }); |
| 323 | |
| 324 | if (!ret.isOk()) { |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 325 | LOG(ERROR) << "Failed to retrieve interface chain: " << ret.description(); |
Martijn Coenen | 1a5da1c | 2017-03-06 13:05:39 +0100 | [diff] [blame] | 326 | return false; |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 327 | } |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 328 | |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 329 | return addSuccess; |
| 330 | } |
| 331 | |
Steven Moreland | d90d9f2 | 2019-03-20 13:47:30 -0700 | [diff] [blame] | 332 | bool ServiceManager::addImpl(const std::string& name, |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 333 | const sp<IBase>& service, |
| 334 | const hidl_vec<hidl_string>& interfaceChain, |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 335 | const AccessControl::CallingContext& callingContext) { |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 336 | if (interfaceChain.size() == 0) { |
| 337 | LOG(WARNING) << "Empty interface chain for " << name; |
| 338 | return false; |
| 339 | } |
| 340 | |
| 341 | // First, verify you're allowed to add() the whole interface hierarchy |
| 342 | for(size_t i = 0; i < interfaceChain.size(); i++) { |
| 343 | const std::string fqName = interfaceChain[i]; |
| 344 | |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 345 | if (!mAcl.canAdd(fqName, callingContext)) { |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 346 | return false; |
| 347 | } |
| 348 | } |
| 349 | |
Steven Moreland | d90d9f2 | 2019-03-20 13:47:30 -0700 | [diff] [blame] | 350 | // Detect duplicate registration |
| 351 | if (interfaceChain.size() > 1) { |
| 352 | // second to last entry should be the highest base class other than IBase. |
| 353 | const std::string baseFqName = interfaceChain[interfaceChain.size() - 2]; |
| 354 | const HidlService *hidlService = lookup(baseFqName, name); |
| 355 | if (hidlService != nullptr && hidlService->getService() != nullptr) { |
| 356 | // This shouldn't occur during normal operation. Here are some cases where |
| 357 | // it might get hit: |
| 358 | // - bad configuration (service installed on device multiple times) |
| 359 | // - race between death notification and a new service being registered |
| 360 | // (previous logs should indicate a separate problem) |
| 361 | const std::string childFqName = interfaceChain[0]; |
| 362 | pid_t newServicePid = IPCThreadState::self()->getCallingPid(); |
| 363 | pid_t oldServicePid = hidlService->getDebugPid(); |
| 364 | LOG(WARNING) << "Detected instance of " << childFqName << " (pid: " << newServicePid |
| 365 | << ") registering over instance of or with base of " << baseFqName << " (pid: " |
| 366 | << oldServicePid << ")."; |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | // Unregister superclass if subclass is registered over it |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 371 | { |
| 372 | // For IBar extends IFoo if IFoo/default is being registered, remove |
| 373 | // IBar/default. This makes sure the following two things are equivalent |
| 374 | // 1). IBar::castFrom(IFoo::getService(X)) |
| 375 | // 2). IBar::getService(X) |
| 376 | // assuming that IBar is declared in the device manifest and there |
Steven Moreland | d90d9f2 | 2019-03-20 13:47:30 -0700 | [diff] [blame] | 377 | // is also not an IBaz extends IFoo and there is no race. |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 378 | const std::string childFqName = interfaceChain[0]; |
Steven Moreland | d90d9f2 | 2019-03-20 13:47:30 -0700 | [diff] [blame] | 379 | const HidlService *hidlService = lookup(childFqName, name); |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 380 | if (hidlService != nullptr) { |
| 381 | const sp<IBase> remove = hidlService->getService(); |
| 382 | |
| 383 | if (remove != nullptr) { |
| 384 | const std::string instanceName = name; |
| 385 | removeService(remove, &instanceName /* restrictToInstanceName */); |
| 386 | } |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | for(size_t i = 0; i < interfaceChain.size(); i++) { |
| 391 | const std::string fqName = interfaceChain[i]; |
| 392 | |
| 393 | PackageInterfaceMap &ifaceMap = mServiceMap[fqName]; |
| 394 | HidlService *hidlService = ifaceMap.lookup(name); |
| 395 | |
| 396 | if (hidlService == nullptr) { |
| 397 | ifaceMap.insertService( |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 398 | std::make_unique<HidlService>(fqName, name, service, callingContext.pid)); |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 399 | } else { |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 400 | hidlService->setService(service, callingContext.pid); |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | ifaceMap.sendPackageRegistrationNotification(fqName, name); |
| 404 | } |
| 405 | |
| 406 | bool linkRet = service->linkToDeath(this, kServiceDiedCookie).withDefault(false); |
| 407 | if (!linkRet) { |
| 408 | LOG(ERROR) << "Could not link to death for " << interfaceChain[0] << "/" << name; |
| 409 | } |
| 410 | |
| 411 | return true; |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 412 | } |
| 413 | |
Steven Moreland | 37aed80 | 2017-04-06 09:16:42 -0700 | [diff] [blame] | 414 | Return<ServiceManager::Transport> ServiceManager::getTransport(const hidl_string& fqName, |
| 415 | const hidl_string& name) { |
| 416 | using ::android::hardware::getTransport; |
| 417 | |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 418 | if (!mAcl.canGet(fqName, getBinderCallingContext())) { |
Martijn Coenen | 7ce83be | 2017-04-07 16:19:32 -0700 | [diff] [blame] | 419 | return Transport::EMPTY; |
| 420 | } |
| 421 | |
Steven Moreland | 37aed80 | 2017-04-06 09:16:42 -0700 | [diff] [blame] | 422 | switch (getTransport(fqName, name)) { |
| 423 | case vintf::Transport::HWBINDER: |
| 424 | return Transport::HWBINDER; |
| 425 | case vintf::Transport::PASSTHROUGH: |
| 426 | return Transport::PASSTHROUGH; |
| 427 | case vintf::Transport::EMPTY: |
| 428 | default: |
| 429 | return Transport::EMPTY; |
| 430 | } |
| 431 | } |
| 432 | |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 433 | Return<void> ServiceManager::list(list_cb _hidl_cb) { |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 434 | if (!mAcl.canList(getBinderCallingContext())) { |
Martijn Coenen | 7ce83be | 2017-04-07 16:19:32 -0700 | [diff] [blame] | 435 | _hidl_cb({}); |
| 436 | return Void(); |
| 437 | } |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 438 | |
| 439 | hidl_vec<hidl_string> list; |
Martijn Coenen | 7ce83be | 2017-04-07 16:19:32 -0700 | [diff] [blame] | 440 | |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 441 | list.resize(countExistingService()); |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 442 | |
| 443 | size_t idx = 0; |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 444 | forEachExistingService([&] (const HidlService *service) { |
| 445 | list[idx++] = service->string(); |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 446 | return true; // continue |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 447 | }); |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 448 | |
| 449 | _hidl_cb(list); |
| 450 | return Void(); |
| 451 | } |
| 452 | |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 453 | Return<void> ServiceManager::listByInterface(const hidl_string& fqName, |
| 454 | listByInterface_cb _hidl_cb) { |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 455 | if (!mAcl.canGet(fqName, getBinderCallingContext())) { |
Martijn Coenen | 7ce83be | 2017-04-07 16:19:32 -0700 | [diff] [blame] | 456 | _hidl_cb({}); |
| 457 | return Void(); |
| 458 | } |
| 459 | |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 460 | auto ifaceIt = mServiceMap.find(fqName); |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 461 | if (ifaceIt == mServiceMap.end()) { |
| 462 | _hidl_cb(hidl_vec<hidl_string>()); |
| 463 | return Void(); |
| 464 | } |
| 465 | |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 466 | const auto &instanceMap = ifaceIt->second.getInstanceMap(); |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 467 | |
| 468 | hidl_vec<hidl_string> list; |
Steven Moreland | fc56b61 | 2017-01-23 20:10:45 -0800 | [diff] [blame] | 469 | |
| 470 | size_t total = 0; |
| 471 | for (const auto &serviceMapping : instanceMap) { |
| 472 | const std::unique_ptr<HidlService> &service = serviceMapping.second; |
| 473 | if (service->getService() == nullptr) continue; |
| 474 | |
| 475 | ++total; |
| 476 | } |
| 477 | list.resize(total); |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 478 | |
| 479 | size_t idx = 0; |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 480 | for (const auto &serviceMapping : instanceMap) { |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 481 | const std::unique_ptr<HidlService> &service = serviceMapping.second; |
Steven Moreland | fc56b61 | 2017-01-23 20:10:45 -0800 | [diff] [blame] | 482 | if (service->getService() == nullptr) continue; |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 483 | |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 484 | list[idx++] = service->getInstanceName(); |
Steven Moreland | 7623781 | 2016-11-08 15:59:04 -0800 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | _hidl_cb(list); |
| 488 | return Void(); |
| 489 | } |
| 490 | |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 491 | Return<bool> ServiceManager::registerForNotifications(const hidl_string& fqName, |
| 492 | const hidl_string& name, |
| 493 | const sp<IServiceNotification>& callback) { |
| 494 | if (callback == nullptr) { |
| 495 | return false; |
| 496 | } |
| 497 | |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 498 | if (!mAcl.canGet(fqName, getBinderCallingContext())) { |
Martijn Coenen | 7ce83be | 2017-04-07 16:19:32 -0700 | [diff] [blame] | 499 | return false; |
| 500 | } |
| 501 | |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 502 | PackageInterfaceMap &ifaceMap = mServiceMap[fqName]; |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 503 | |
| 504 | if (name.empty()) { |
Steven Moreland | 78c899e | 2018-09-27 16:45:18 -0700 | [diff] [blame] | 505 | bool ret = callback->linkToDeath(this, kPackageListenerDiedCookie).withDefault(false); |
| 506 | if (!ret) { |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 507 | LOG(ERROR) << "Failed to register death recipient for " << fqName << "/" << name; |
| 508 | return false; |
| 509 | } |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 510 | ifaceMap.addPackageListener(callback); |
| 511 | return true; |
| 512 | } |
| 513 | |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 514 | HidlService *service = ifaceMap.lookup(name); |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 515 | |
Steven Moreland | 78c899e | 2018-09-27 16:45:18 -0700 | [diff] [blame] | 516 | bool ret = callback->linkToDeath(this, kServiceListenerDiedCookie).withDefault(false); |
| 517 | if (!ret) { |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 518 | LOG(ERROR) << "Failed to register death recipient for " << fqName << "/" << name; |
| 519 | return false; |
| 520 | } |
| 521 | |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 522 | if (service == nullptr) { |
Steven Moreland | cdf9472 | 2017-03-21 12:16:31 -0700 | [diff] [blame] | 523 | auto adding = std::make_unique<HidlService>(fqName, name); |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 524 | adding->addListener(callback); |
| 525 | ifaceMap.insertService(std::move(adding)); |
Steven Moreland | 2173d3c | 2016-11-09 15:00:58 -0800 | [diff] [blame] | 526 | } else { |
| 527 | service->addListener(callback); |
| 528 | } |
| 529 | |
| 530 | return true; |
| 531 | } |
| 532 | |
Steven Moreland | 6f4fbe1 | 2017-07-21 18:07:42 -0700 | [diff] [blame] | 533 | Return<bool> ServiceManager::unregisterForNotifications(const hidl_string& fqName, |
| 534 | const hidl_string& name, |
| 535 | const sp<IServiceNotification>& callback) { |
| 536 | if (callback == nullptr) { |
| 537 | LOG(ERROR) << "Cannot unregister null callback for " << fqName << "/" << name; |
| 538 | return false; |
| 539 | } |
| 540 | |
| 541 | // NOTE: don't need ACL since callback is binder token, and if someone has gotten it, |
| 542 | // then they already have access to it. |
| 543 | |
| 544 | if (fqName.empty()) { |
| 545 | bool success = false; |
| 546 | success |= removePackageListener(callback); |
| 547 | success |= removeServiceListener(callback); |
| 548 | return success; |
| 549 | } |
| 550 | |
| 551 | PackageInterfaceMap &ifaceMap = mServiceMap[fqName]; |
| 552 | |
| 553 | if (name.empty()) { |
| 554 | bool success = false; |
| 555 | success |= ifaceMap.removePackageListener(callback); |
| 556 | success |= ifaceMap.removeServiceListener(callback); |
| 557 | return success; |
| 558 | } |
| 559 | |
| 560 | HidlService *service = ifaceMap.lookup(name); |
| 561 | |
| 562 | if (service == nullptr) { |
| 563 | return false; |
| 564 | } |
| 565 | |
| 566 | return service->removeListener(callback); |
| 567 | } |
| 568 | |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 569 | Return<bool> ServiceManager::registerClientCallback(const hidl_string& hidlFqName, |
| 570 | const hidl_string& hidlName, |
| 571 | const sp<IBase>& server, |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 572 | const sp<IClientCallback>& cb) { |
| 573 | if (server == nullptr || cb == nullptr) return false; |
| 574 | |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 575 | const std::string fqName = hidlFqName; |
| 576 | const std::string name = hidlName; |
| 577 | |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 578 | // only the server of the interface can register a client callback |
| 579 | pid_t pid = IPCThreadState::self()->getCallingPid(); |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 580 | if (!mAcl.canAdd(fqName, getBinderCallingContext())) { |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 581 | return false; |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 582 | } |
| 583 | |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 584 | HidlService* registered = lookup(fqName, name); |
| 585 | |
| 586 | if (registered == nullptr) { |
| 587 | return false; |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 588 | } |
| 589 | |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 590 | // sanity |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 591 | if (registered->getDebugPid() != pid) { |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 592 | LOG(WARNING) << "Only a server can register for client callbacks (for " << fqName |
| 593 | << "/" << name << ")"; |
| 594 | return false; |
| 595 | } |
| 596 | |
| 597 | sp<IBase> service = registered->getService(); |
| 598 | |
| 599 | if (!interfacesEqual(service, server)) { |
| 600 | LOG(WARNING) << "Tried to register client callback for " << fqName << "/" << name |
| 601 | << " but a different service is registered under this name."; |
| 602 | return false; |
| 603 | } |
| 604 | |
| 605 | bool linkRet = cb->linkToDeath(this, kClientCallbackDiedCookie).withDefault(false); |
| 606 | if (!linkRet) { |
| 607 | LOG(ERROR) << "Could not link to death for registerClientCallback"; |
| 608 | return false; |
| 609 | } |
| 610 | |
Steven Moreland | 105c58b | 2020-04-06 16:18:50 -0700 | [diff] [blame] | 611 | // knownClientCount |
| 612 | // - one from binder transaction (base here) |
| 613 | // - one from hwservicemanager |
| 614 | registered->addClientCallback(cb, 2 /*knownClientCount*/); |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 615 | |
| 616 | return true; |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | Return<bool> ServiceManager::unregisterClientCallback(const sp<IBase>& server, |
| 620 | const sp<IClientCallback>& cb) { |
| 621 | if (cb == nullptr) return false; |
| 622 | |
| 623 | bool removed = false; |
| 624 | |
| 625 | forEachExistingService([&] (HidlService *service) { |
| 626 | if (server == nullptr || interfacesEqual(service->getService(), server)) { |
| 627 | removed |= service->removeClientCallback(cb); |
| 628 | } |
| 629 | return true; // continue |
| 630 | }); |
| 631 | |
| 632 | return removed; |
| 633 | } |
| 634 | |
| 635 | void ServiceManager::handleClientCallbacks() { |
| 636 | forEachServiceEntry([&] (HidlService *service) { |
Steven Moreland | 105c58b | 2020-04-06 16:18:50 -0700 | [diff] [blame] | 637 | // hwservicemanager will hold one reference, so knownClientCount is 1. |
| 638 | service->handleClientCallbacks(true /* isCalledOnInterval */, 1 /*knownClientCount*/); |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 639 | return true; // continue |
| 640 | }); |
| 641 | } |
| 642 | |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 643 | Return<bool> ServiceManager::addWithChain(const hidl_string& name, |
| 644 | const sp<IBase>& service, |
| 645 | const hidl_vec<hidl_string>& chain) { |
| 646 | if (service == nullptr) { |
| 647 | return false; |
| 648 | } |
| 649 | |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 650 | auto callingContext = getBinderCallingContext(); |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 651 | |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 652 | return addImpl(name, service, chain, callingContext); |
Steven Moreland | 707f22c | 2018-10-11 12:09:34 -0700 | [diff] [blame] | 653 | } |
| 654 | |
Steven Moreland | aae4eab | 2018-10-29 13:00:31 -0700 | [diff] [blame] | 655 | Return<void> ServiceManager::listManifestByInterface(const hidl_string& fqName, |
| 656 | listManifestByInterface_cb _hidl_cb) { |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 657 | if (!mAcl.canGet(fqName, getBinderCallingContext())) { |
Steven Moreland | aae4eab | 2018-10-29 13:00:31 -0700 | [diff] [blame] | 658 | _hidl_cb({}); |
| 659 | return Void(); |
| 660 | } |
| 661 | |
| 662 | std::set<std::string> instances = getInstances(fqName); |
| 663 | hidl_vec<hidl_string> ret(instances.begin(), instances.end()); |
| 664 | |
| 665 | _hidl_cb(ret); |
| 666 | return Void(); |
| 667 | } |
| 668 | |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 669 | Return<bool> ServiceManager::tryUnregister(const hidl_string& hidlFqName, |
| 670 | const hidl_string& hidlName, |
| 671 | const sp<IBase>& service) { |
| 672 | const std::string fqName = hidlFqName; |
| 673 | const std::string name = hidlName; |
| 674 | |
| 675 | if (service == nullptr) { |
| 676 | return false; |
| 677 | } |
| 678 | |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 679 | if (!mAcl.canAdd(fqName, getBinderCallingContext())) { |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 680 | return false; |
| 681 | } |
| 682 | |
| 683 | HidlService* registered = lookup(fqName, name); |
| 684 | |
| 685 | // sanity |
Xin Li | bf44d5a | 2019-03-11 17:50:47 -0700 | [diff] [blame] | 686 | pid_t pid = IPCThreadState::self()->getCallingPid(); |
| 687 | if (registered->getDebugPid() != pid) { |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 688 | LOG(WARNING) << "Only a server can unregister itself (for " << fqName |
| 689 | << "/" << name << ")"; |
| 690 | return false; |
| 691 | } |
| 692 | |
| 693 | sp<IBase> server = registered->getService(); |
| 694 | |
| 695 | if (!interfacesEqual(service, server)) { |
| 696 | LOG(WARNING) << "Tried to unregister for " << fqName << "/" << name |
| 697 | << " but a different service is registered under this name."; |
| 698 | return false; |
| 699 | } |
| 700 | |
Steven Moreland | 105c58b | 2020-04-06 16:18:50 -0700 | [diff] [blame] | 701 | // knownClientCount |
| 702 | // - one from binder transaction (base here) |
| 703 | // - one from hwservicemanager |
| 704 | bool clients = registered->forceHandleClientCallbacks(false /*isCalledOnInterval*/, 2 /*knownClientCount*/); |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 705 | |
Steven Moreland | 105c58b | 2020-04-06 16:18:50 -0700 | [diff] [blame] | 706 | if (clients) { |
Steven Moreland | dbaab55 | 2019-01-24 19:00:04 -0800 | [diff] [blame] | 707 | // client callbacks are either disabled or there are other clients |
| 708 | LOG(INFO) << "Tried to unregister for " << fqName << "/" << name |
| 709 | << " but there are clients: " << clients; |
| 710 | return false; |
| 711 | } |
| 712 | |
| 713 | // will remove entire parent hierarchy |
| 714 | bool success = removeService(service, &name /*restrictToInstanceName*/); |
| 715 | |
| 716 | if (registered->getService() != nullptr) { |
| 717 | LOG(ERROR) << "Bad state. Unregistration failed for " << fqName << "/" << name << "."; |
| 718 | return false; |
| 719 | } |
| 720 | |
| 721 | return success; |
| 722 | } |
| 723 | |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 724 | Return<void> ServiceManager::debugDump(debugDump_cb _cb) { |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 725 | if (!mAcl.canList(getBinderCallingContext())) { |
Martijn Coenen | 7ce83be | 2017-04-07 16:19:32 -0700 | [diff] [blame] | 726 | _cb({}); |
| 727 | return Void(); |
| 728 | } |
| 729 | |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 730 | std::vector<IServiceManager::InstanceDebugInfo> list; |
| 731 | forEachServiceEntry([&] (const HidlService *service) { |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 732 | hidl_vec<int32_t> clientPids; |
| 733 | clientPids.resize(service->getPassthroughClients().size()); |
| 734 | |
| 735 | size_t i = 0; |
| 736 | for (pid_t p : service->getPassthroughClients()) { |
| 737 | clientPids[i++] = p; |
| 738 | } |
| 739 | |
| 740 | list.push_back({ |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 741 | .interfaceName = service->getInterfaceName(), |
| 742 | .instanceName = service->getInstanceName(), |
Nick Desaulniers | 1c48f2f | 2019-10-15 19:20:40 -0700 | [diff] [blame] | 743 | .pid = service->getDebugPid(), |
Yifan Hong | 1d2deb1 | 2017-03-02 16:58:22 -0800 | [diff] [blame] | 744 | .clientPids = clientPids, |
| 745 | .arch = ::android::hidl::base::V1_0::DebugInfo::Architecture::UNKNOWN |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 746 | }); |
Steven Moreland | d853620 | 2018-09-26 10:56:19 -0700 | [diff] [blame] | 747 | |
| 748 | return true; // continue |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 749 | }); |
| 750 | |
| 751 | _cb(list); |
| 752 | return Void(); |
| 753 | } |
| 754 | |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 755 | |
| 756 | Return<void> ServiceManager::registerPassthroughClient(const hidl_string &fqName, |
Martijn Coenen | 737de1b | 2017-04-27 09:29:43 -0700 | [diff] [blame] | 757 | const hidl_string &name) { |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 758 | auto callingContext = getBinderCallingContext(); |
| 759 | |
| 760 | if (!mAcl.canGet(fqName, callingContext)) { |
Martijn Coenen | 7ce83be | 2017-04-07 16:19:32 -0700 | [diff] [blame] | 761 | /* We guard this function with "get", because it's typically used in |
| 762 | * the getService() path, albeit for a passthrough service in this |
| 763 | * case |
| 764 | */ |
| 765 | return Void(); |
| 766 | } |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 767 | |
| 768 | PackageInterfaceMap &ifaceMap = mServiceMap[fqName]; |
| 769 | |
| 770 | if (name.empty()) { |
| 771 | LOG(WARNING) << "registerPassthroughClient encounters empty instance name for " |
| 772 | << fqName.c_str(); |
| 773 | return Void(); |
| 774 | } |
| 775 | |
| 776 | HidlService *service = ifaceMap.lookup(name); |
| 777 | |
| 778 | if (service == nullptr) { |
Steven Moreland | cdf9472 | 2017-03-21 12:16:31 -0700 | [diff] [blame] | 779 | auto adding = std::make_unique<HidlService>(fqName, name); |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 780 | adding->registerPassthroughClient(callingContext.pid); |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 781 | ifaceMap.insertService(std::move(adding)); |
| 782 | } else { |
Steven Moreland | 2aefd64 | 2019-01-03 17:51:17 -0800 | [diff] [blame] | 783 | service->registerPassthroughClient(callingContext.pid); |
Yifan Hong | ee531a8 | 2017-02-03 15:10:18 -0800 | [diff] [blame] | 784 | } |
| 785 | return Void(); |
| 786 | } |
| 787 | |
Steven Moreland | 76936fe | 2017-09-19 12:18:30 -0700 | [diff] [blame] | 788 | bool ServiceManager::removeService(const wp<IBase>& who, const std::string* restrictToInstanceName) { |
Steven Moreland | 76936fe | 2017-09-19 12:18:30 -0700 | [diff] [blame] | 789 | bool keepInstance = false; |
| 790 | bool removed = false; |
Martijn Coenen | 46847a6 | 2016-12-19 05:36:12 +0100 | [diff] [blame] | 791 | for (auto &interfaceMapping : mServiceMap) { |
| 792 | auto &instanceMap = interfaceMapping.second.getInstanceMap(); |
| 793 | |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 794 | for (auto &servicePair : instanceMap) { |
Steven Moreland | 76936fe | 2017-09-19 12:18:30 -0700 | [diff] [blame] | 795 | const std::string &instanceName = servicePair.first; |
Steven Moreland | d544cf6 | 2017-01-04 15:24:32 -0800 | [diff] [blame] | 796 | const std::unique_ptr<HidlService> &service = servicePair.second; |
Steven Moreland | 76936fe | 2017-09-19 12:18:30 -0700 | [diff] [blame] | 797 | |
Steven Moreland | 6f4fbe1 | 2017-07-21 18:07:42 -0700 | [diff] [blame] | 798 | if (interfacesEqual(service->getService(), who.promote())) { |
Steven Moreland | 76936fe | 2017-09-19 12:18:30 -0700 | [diff] [blame] | 799 | if (restrictToInstanceName != nullptr && *restrictToInstanceName != instanceName) { |
| 800 | // We cannot remove all instances of this service, so we don't return that it |
| 801 | // has been entirely removed. |
| 802 | keepInstance = true; |
| 803 | continue; |
| 804 | } |
| 805 | |
Steven Moreland | cdf9472 | 2017-03-21 12:16:31 -0700 | [diff] [blame] | 806 | service->setService(nullptr, static_cast<pid_t>(IServiceManager::PidConstant::NO_PID)); |
Steven Moreland | 76936fe | 2017-09-19 12:18:30 -0700 | [diff] [blame] | 807 | removed = true; |
Martijn Coenen | 46847a6 | 2016-12-19 05:36:12 +0100 | [diff] [blame] | 808 | } |
| 809 | } |
| 810 | } |
Steven Moreland | 76936fe | 2017-09-19 12:18:30 -0700 | [diff] [blame] | 811 | |
| 812 | return !keepInstance && removed; |
Martijn Coenen | 46847a6 | 2016-12-19 05:36:12 +0100 | [diff] [blame] | 813 | } |
Yifan Hong | 83c49f6 | 2017-01-25 14:16:34 -0800 | [diff] [blame] | 814 | |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 815 | bool ServiceManager::removePackageListener(const wp<IBase>& who) { |
| 816 | bool found = false; |
| 817 | |
| 818 | for (auto &interfaceMapping : mServiceMap) { |
| 819 | found |= interfaceMapping.second.removePackageListener(who); |
| 820 | } |
| 821 | |
| 822 | return found; |
| 823 | } |
| 824 | |
| 825 | bool ServiceManager::removeServiceListener(const wp<IBase>& who) { |
| 826 | bool found = false; |
| 827 | for (auto &interfaceMapping : mServiceMap) { |
Steven Moreland | 6f4fbe1 | 2017-07-21 18:07:42 -0700 | [diff] [blame] | 828 | auto &packageInterfaceMap = interfaceMapping.second; |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 829 | |
Steven Moreland | 6f4fbe1 | 2017-07-21 18:07:42 -0700 | [diff] [blame] | 830 | found |= packageInterfaceMap.removeServiceListener(who); |
Martijn Coenen | 7fafc14 | 2017-03-06 16:17:51 +0100 | [diff] [blame] | 831 | } |
| 832 | return found; |
| 833 | } |
Steven Moreland | 6f4fbe1 | 2017-07-21 18:07:42 -0700 | [diff] [blame] | 834 | } // namespace implementation |
Steven Moreland | d83d110 | 2016-10-25 15:01:47 -0700 | [diff] [blame] | 835 | } // namespace manager |
| 836 | } // namespace hidl |
| 837 | } // namespace android |