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/*
* 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.
*/
#include "ProcessPipe.h"
#include "renderControl_enc.h"
#include "qemu_pipe.h"
#if PLATFORM_SDK_VERSION < 26
#include <cutils/log.h>
#else
#include <log/log.h>
#endif
#include <pthread.h>
#include <errno.h>
#ifdef __Fuchsia__
#include <fuchsia/hardware/goldfish/cpp/fidl.h>
#include <lib/zx/vmo.h>
#include "services/service_connector.h"
static QEMU_PIPE_HANDLE sProcDevice = 0;
#else // __Fuchsia__
#include "VirtioGpuPipeStream.h"
static VirtioGpuPipeStream* sVirtioGpuPipeStream = 0;
#endif // !__Fuchsia__
static QEMU_PIPE_HANDLE sProcPipe = 0;
static pthread_once_t sProcPipeOnce = PTHREAD_ONCE_INIT;
// sProcUID is a unique ID per process assigned by the host.
// It is different from getpid().
static uint64_t sProcUID = 0;
static volatile HostConnectionType sConnType = HOST_CONNECTION_VIRTIO_GPU_PIPE;
// processPipeInitOnce is used to generate a process unique ID (puid).
// processPipeInitOnce will only be called at most once per process.
// Use it with pthread_once for thread safety.
// The host associates resources with process unique ID (puid) for memory cleanup.
// It will fallback to the default path if the host does not support it.
// Processes are identified by acquiring a per-process 64bit unique ID from the
// host.
#ifdef __Fuchsia__
static void processPipeInitOnce() {
zx::channel channel(GetConnectToServiceFunction()(QEMU_PIPE_PATH));
if (!channel) {
ALOGE("%s: failed to open " QEMU_PIPE_PATH,
__FUNCTION__);
return;
}
fuchsia::hardware::goldfish::PipeDeviceSyncPtr device;
device.Bind(std::move(channel));
fuchsia::hardware::goldfish::PipeSyncPtr pipe;
device->OpenPipe(pipe.NewRequest());
zx_status_t status, status2 = ZX_OK;
zx::vmo vmo;
status = pipe->GetBuffer(&status2, &vmo);
if (status != ZX_OK || status2 != ZX_OK) {
ALOGE("%s: failed to get buffer: %d:%d", __FUNCTION__, status, status2);
return;
}
size_t len = strlen("pipe:GLProcessPipe");
status = vmo.write("pipe:GLProcessPipe", 0, len + 1);
if (status != ZX_OK) {
ALOGE("%s: failed write pipe name", __FUNCTION__);
return;
}
uint64_t actual;
status = pipe->Write(len + 1, 0, &status2, &actual);
if (status != ZX_OK || status2 != ZX_OK) {
ALOGD("%s: connecting to pipe service failed: %d:%d", __FUNCTION__,
status, status2);
return;
}
// Send a confirmation int to the host and get per-process unique ID back
int32_t confirmInt = 100;
status = vmo.write(&confirmInt, 0, sizeof(confirmInt));
if (status != ZX_OK) {
ALOGE("%s: failed write confirm int", __FUNCTION__);
return;
}
status = pipe->Call(sizeof(confirmInt), 0, sizeof(sProcUID), 0, &status2, &actual);
if (status != ZX_OK || status2 != ZX_OK) {
ALOGD("%s: failed to get per-process ID: %d:%d", __FUNCTION__,
status, status2);
return;
}
status = vmo.read(&sProcUID, 0, sizeof(sProcUID));
if (status != ZX_OK) {
ALOGE("%s: failed read per-process ID: %d", __FUNCTION__, status);
return;
}
sProcDevice = device.Unbind().TakeChannel().release();
sProcPipe = pipe.Unbind().TakeChannel().release();
}
#else // __Fuchsia__
static void sQemuPipeInit() {
sProcPipe = qemu_pipe_open("GLProcessPipe");
if (!qemu_pipe_valid(sProcPipe)) {
sProcPipe = 0;
ALOGW("Process pipe failed");
return;
}
// Send a confirmation int to the host
int32_t confirmInt = 100;
ssize_t stat = 0;
do {
stat =
qemu_pipe_write(sProcPipe, (const char*)&confirmInt,
sizeof(confirmInt));
} while (stat < 0 && errno == EINTR);
if (stat != sizeof(confirmInt)) { // failed
qemu_pipe_close(sProcPipe);
sProcPipe = 0;
ALOGW("Process pipe failed");
return;
}
// Ask the host for per-process unique ID
do {
stat =
qemu_pipe_read(sProcPipe, (char*)&sProcUID,
sizeof(sProcUID));
} while (stat < 0 && (errno == EINTR || errno == EAGAIN));
if (stat != sizeof(sProcUID)) {
qemu_pipe_close(sProcPipe);
sProcPipe = 0;
sProcUID = 0;
ALOGW("Process pipe failed");
return;
}
}
static void processPipeInitOnce() {
#if defined(HOST_BUILD) || !defined(GOLDFISH_VULKAN)
sQemuPipeInit();
#else // HOST_BUILD
switch (sConnType) {
// TODO: Move those over too
case HOST_CONNECTION_QEMU_PIPE:
case HOST_CONNECTION_ADDRESS_SPACE:
case HOST_CONNECTION_TCP:
case HOST_CONNECTION_VIRTIO_GPU:
sQemuPipeInit();
break;
case HOST_CONNECTION_VIRTIO_GPU_PIPE: {
sVirtioGpuPipeStream = new VirtioGpuPipeStream(4096);
sProcUID = sVirtioGpuPipeStream->initProcessPipe();
break;
}
}
#endif // !HOST_BUILD
}
#endif // !__Fuchsia__
bool processPipeInit(HostConnectionType connType, renderControl_encoder_context_t *rcEnc) {
sConnType = connType;
pthread_once(&sProcPipeOnce, processPipeInitOnce);
bool pipeHandleInvalid = !sProcPipe;
#ifndef __Fuchsia__
pipeHandleInvalid = pipeHandleInvalid && !sVirtioGpuPipeStream;
#endif // !__Fuchsia__
if (pipeHandleInvalid) return false;
rcEnc->rcSetPuid(rcEnc, sProcUID);
return true;
}
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