blob: e9c088456614418c4bc9bd88bb8bbf0ec034e6cb [file] [log] [blame]
/*
* Copyright (C) 2016 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.
*/
#define LOG_TAG "AAudioService"
//#define LOG_NDEBUG 0
#include <utils/Log.h>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <android/content/AttributionSourceState.h>
#include <aaudio/AAudio.h>
#include <media/AidlConversion.h>
#include <mediautils/ServiceUtilities.h>
#include <utils/String16.h>
#include "binding/AAudioServiceMessage.h"
#include "AAudioClientTracker.h"
#include "AAudioEndpointManager.h"
#include "AAudioService.h"
#include "AAudioServiceStreamMMAP.h"
#include "AAudioServiceStreamShared.h"
using namespace android;
using namespace aaudio;
#define MAX_STREAMS_PER_PROCESS 8
#define AIDL_RETURN(x) { *_aidl_return = (x); return Status::ok(); }
#define VALUE_OR_RETURN_ILLEGAL_ARG_STATUS(x) \
({ auto _tmp = (x); \
if (!_tmp.ok()) AIDL_RETURN(AAUDIO_ERROR_ILLEGAL_ARGUMENT); \
std::move(_tmp.value()); })
using android::AAudioService;
using android::content::AttributionSourceState;
using binder::Status;
android::AAudioService::AAudioService()
: BnAAudioService(),
mAdapter(this) {
// TODO consider using geteuid()
// TODO b/182392769: use attribution source util
mAudioClient.attributionSource.uid = VALUE_OR_FATAL(legacy2aidl_uid_t_int32_t(getuid()));
mAudioClient.attributionSource.pid = VALUE_OR_FATAL(legacy2aidl_pid_t_int32_t(getpid()));
mAudioClient.attributionSource.packageName = std::nullopt;
mAudioClient.attributionSource.attributionTag = std::nullopt;
AAudioClientTracker::getInstance().setAAudioService(this);
}
status_t AAudioService::dump(int fd, const Vector<String16>& /*args*/) {
std::string result;
if (!dumpAllowed()) {
std::stringstream ss;
ss << "Permission Denial: can't dump AAudioService from pid="
<< IPCThreadState::self()->getCallingPid() << ", uid="
<< IPCThreadState::self()->getCallingUid() << "\n";
result = ss.str();
ALOGW("%s", result.c_str());
} else {
result = "------------ AAudio Service ------------\n"
+ mStreamTracker.dump()
+ AAudioClientTracker::getInstance().dump()
+ AAudioEndpointManager::getInstance().dump();
}
(void)write(fd, result.c_str(), result.size());
return NO_ERROR;
}
Status AAudioService::registerClient(const sp<IAAudioClient> &client) {
const pid_t pid = IPCThreadState::self()->getCallingPid();
AAudioClientTracker::getInstance().registerClient(pid, client);
return Status::ok();
}
Status
AAudioService::openStream(const StreamRequest &_request, StreamParameters* _paramsOut,
int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
// Create wrapper objects for simple usage of the parcelables.
const AAudioStreamRequest request(_request);
AAudioStreamConfiguration paramsOut;
// A lock in is used to order the opening of endpoints when an
// EXCLUSIVE endpoint is stolen. We want the order to be:
// 1) Thread A opens exclusive MMAP endpoint
// 2) Thread B wants to open an exclusive MMAP endpoint so it steals the one from A
// under this lock.
// 3) Thread B opens a shared MMAP endpoint.
// 4) Thread A can then get the lock and also open a shared stream.
// Without the lock. Thread A might sneak in and reallocate an exclusive stream
// before B can open the shared stream.
const std::unique_lock<std::recursive_mutex> lock(mOpenLock);
aaudio_result_t result = AAUDIO_OK;
sp<AAudioServiceStreamBase> serviceStream;
const AAudioStreamConfiguration &configurationInput = request.getConstantConfiguration();
const bool sharingModeMatchRequired = request.isSharingModeMatchRequired();
const aaudio_sharing_mode_t sharingMode = configurationInput.getSharingMode();
// Enforce limit on client processes.
AttributionSourceState attributionSource = request.getAttributionSource();
const pid_t pid = IPCThreadState::self()->getCallingPid();
attributionSource.pid = VALUE_OR_RETURN_ILLEGAL_ARG_STATUS(
legacy2aidl_pid_t_int32_t(pid));
attributionSource.uid = VALUE_OR_RETURN_ILLEGAL_ARG_STATUS(
legacy2aidl_uid_t_int32_t(IPCThreadState::self()->getCallingUid()));
attributionSource.token = sp<BBinder>::make();
if (attributionSource.pid != mAudioClient.attributionSource.pid) {
const int32_t count = AAudioClientTracker::getInstance().getStreamCount(pid);
if (count >= MAX_STREAMS_PER_PROCESS) {
ALOGE("openStream(): exceeded max streams per process %d >= %d",
count, MAX_STREAMS_PER_PROCESS);
AIDL_RETURN(AAUDIO_ERROR_UNAVAILABLE);
}
}
if (sharingMode != AAUDIO_SHARING_MODE_EXCLUSIVE && sharingMode != AAUDIO_SHARING_MODE_SHARED) {
ALOGE("openStream(): unrecognized sharing mode = %d", sharingMode);
AIDL_RETURN(AAUDIO_ERROR_ILLEGAL_ARGUMENT);
}
if (sharingMode == AAUDIO_SHARING_MODE_EXCLUSIVE
&& AAudioClientTracker::getInstance().isExclusiveEnabled(pid)) {
// only trust audioserver for in service indication
bool inService = false;
if (isCallerInService()) {
inService = request.isInService();
}
serviceStream = new AAudioServiceStreamMMAP(*this, inService);
result = serviceStream->open(request);
if (result != AAUDIO_OK) {
// Clear it so we can possibly fall back to using a shared stream.
ALOGW("openStream(), could not open in EXCLUSIVE mode");
serviceStream.clear();
}
}
// Try SHARED if SHARED requested or if EXCLUSIVE failed.
if (sharingMode == AAUDIO_SHARING_MODE_SHARED) {
serviceStream = new AAudioServiceStreamShared(*this);
result = serviceStream->open(request);
} else if (serviceStream.get() == nullptr && !sharingModeMatchRequired) {
aaudio::AAudioStreamRequest modifiedRequest = request;
// Overwrite the original EXCLUSIVE mode with SHARED.
modifiedRequest.getConfiguration().setSharingMode(AAUDIO_SHARING_MODE_SHARED);
serviceStream = new AAudioServiceStreamShared(*this);
result = serviceStream->open(modifiedRequest);
}
if (result != AAUDIO_OK) {
serviceStream.clear();
AIDL_RETURN(result);
} else {
const aaudio_handle_t handle = mStreamTracker.addStreamForHandle(serviceStream.get());
serviceStream->setHandle(handle);
AAudioClientTracker::getInstance().registerClientStream(pid, serviceStream);
paramsOut.copyFrom(*serviceStream);
*_paramsOut = std::move(paramsOut).parcelable();
// Log open in MediaMetrics after we have the handle because we need the handle to
// create the metrics ID.
serviceStream->logOpen(handle);
ALOGV("%s(): return handle = 0x%08X", __func__, handle);
AIDL_RETURN(handle);
}
}
Status AAudioService::closeStream(int32_t streamHandle, int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
// Check permission and ownership first.
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGE("closeStream(0x%0x), illegal stream handle", streamHandle);
AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
}
AIDL_RETURN(closeStream(serviceStream));
}
Status AAudioService::getStreamDescription(int32_t streamHandle, Endpoint* endpoint,
int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGE("getStreamDescription(), illegal stream handle = 0x%0x", streamHandle);
AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
}
AudioEndpointParcelable endpointParcelable;
const aaudio_result_t result = serviceStream->getDescription(endpointParcelable);
if (result == AAUDIO_OK) {
*endpoint = std::move(endpointParcelable).parcelable();
}
AIDL_RETURN(result);
}
Status AAudioService::startStream(int32_t streamHandle, int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
}
AIDL_RETURN(serviceStream->start());
}
Status AAudioService::pauseStream(int32_t streamHandle, int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
}
AIDL_RETURN(serviceStream->pause());
}
Status AAudioService::stopStream(int32_t streamHandle, int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
}
AIDL_RETURN(serviceStream->stop());
}
Status AAudioService::flushStream(int32_t streamHandle, int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
}
AIDL_RETURN(serviceStream->flush());
}
Status AAudioService::registerAudioThread(int32_t streamHandle, int32_t clientThreadId,
int64_t /*periodNanoseconds*/, int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
}
const int32_t priority = isCallerInService()
? kRealTimeAudioPriorityService : kRealTimeAudioPriorityClient;
AIDL_RETURN(serviceStream->registerAudioThread(clientThreadId, priority));
}
Status AAudioService::unregisterAudioThread(int32_t streamHandle, int32_t clientThreadId,
int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
}
AIDL_RETURN(serviceStream->unregisterAudioThread(clientThreadId));
}
Status AAudioService::exitStandby(int32_t streamHandle, Endpoint* endpoint, int32_t *_aidl_return) {
static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGE("getStreamDescription(), illegal stream handle = 0x%0x", streamHandle);
AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
}
AudioEndpointParcelable endpointParcelable;
const aaudio_result_t result = serviceStream->exitStandby(&endpointParcelable);
if (result == AAUDIO_OK) {
*endpoint = std::move(endpointParcelable).parcelable();
}
AIDL_RETURN(result);
}
bool AAudioService::isCallerInService() {
const pid_t clientPid = VALUE_OR_FATAL(
aidl2legacy_int32_t_pid_t(mAudioClient.attributionSource.pid));
const uid_t clientUid = VALUE_OR_FATAL(
aidl2legacy_int32_t_uid_t(mAudioClient.attributionSource.uid));
return clientPid == IPCThreadState::self()->getCallingPid() &&
clientUid == IPCThreadState::self()->getCallingUid();
}
aaudio_result_t AAudioService::closeStream(const sp<AAudioServiceStreamBase>& serviceStream) {
// This is protected by a lock in AAudioClientTracker.
// It is safe to unregister the same stream twice.
const pid_t pid = serviceStream->getOwnerProcessId();
AAudioClientTracker::getInstance().unregisterClientStream(pid, serviceStream);
// This is protected by a lock in mStreamTracker.
// It is safe to remove the same stream twice.
mStreamTracker.removeStreamByHandle(serviceStream->getHandle());
return serviceStream->close();
}
sp<AAudioServiceStreamBase> AAudioService::convertHandleToServiceStream(
aaudio_handle_t streamHandle) {
sp<AAudioServiceStreamBase> serviceStream = mStreamTracker.getStreamByHandle(
streamHandle);
if (serviceStream.get() != nullptr) {
// Only allow owner or the aaudio service to access the stream.
const uid_t callingUserId = IPCThreadState::self()->getCallingUid();
const uid_t ownerUserId = serviceStream->getOwnerUserId();
const uid_t clientUid = VALUE_OR_FATAL(
aidl2legacy_int32_t_uid_t(mAudioClient.attributionSource.uid));
const bool callerOwnsIt = callingUserId == ownerUserId;
const bool serverCalling = callingUserId == clientUid;
const bool serverOwnsIt = ownerUserId == clientUid;
const bool allowed = callerOwnsIt || serverCalling || serverOwnsIt;
if (!allowed) {
ALOGE("AAudioService: calling uid %d cannot access stream 0x%08X owned by %d",
callingUserId, streamHandle, ownerUserId);
serviceStream.clear();
}
}
return serviceStream;
}
aaudio_result_t AAudioService::startClient(aaudio_handle_t streamHandle,
const android::AudioClient& client,
const audio_attributes_t *attr,
audio_port_handle_t *clientHandle) {
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
return AAUDIO_ERROR_INVALID_HANDLE;
}
return serviceStream->startClient(client, attr, clientHandle);
}
aaudio_result_t AAudioService::stopClient(aaudio_handle_t streamHandle,
audio_port_handle_t portHandle) {
const sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
if (serviceStream.get() == nullptr) {
ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
return AAUDIO_ERROR_INVALID_HANDLE;
}
return serviceStream->stopClient(portHandle);
}
// This is only called internally when AudioFlinger wants to tear down a stream.
// So we do not have to check permissions.
aaudio_result_t AAudioService::disconnectStreamByPortHandle(audio_port_handle_t portHandle) {
ALOGD("%s(%d) called", __func__, portHandle);
const sp<AAudioServiceStreamBase> serviceStream =
mStreamTracker.findStreamByPortHandle(portHandle);
if (serviceStream.get() == nullptr) {
ALOGE("%s(), could not find stream with portHandle = %d", __func__, portHandle);
return AAUDIO_ERROR_INVALID_HANDLE;
}
// This is protected by a lock and will just return if already stopped.
const aaudio_result_t result = serviceStream->stop();
serviceStream->disconnect();
return result;
}