Add importBuffer to BufferHubBinderService
Now you can create a new IBufferClient using token generated by
duplicate(). The new client will be linked to the same node in the
backend.
Import an unexisting token will return PERMISSION_DENIED, while import a
gone buffer will get DEAD_OBJECT.
Test: atest buffer_hub_binder_service-test
Bug: 116681016
Change-Id: Ib07fd160dad98bcaed017b3efa648863b70aa142
diff --git a/services/vr/bufferhubd/IBufferHub.cpp b/services/vr/bufferhubd/IBufferHub.cpp
index a2c0a4a..022a9cc 100644
--- a/services/vr/bufferhubd/IBufferHub.cpp
+++ b/services/vr/bufferhubd/IBufferHub.cpp
@@ -13,6 +13,8 @@
uint32_t layer_count, uint32_t format,
uint64_t usage,
uint64_t user_metadata_size) override;
+
+ status_t importBuffer(uint64_t token, sp<IBufferClient>* outClient) override;
};
IMPLEMENT_META_INTERFACE(BufferHub, "android.dvr.IBufferHub");
@@ -20,6 +22,7 @@
// Transaction code
enum {
CREATE_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
+ IMPORT_BUFFER,
};
sp<IBufferClient> BpBufferHub::createBuffer(uint32_t width, uint32_t height,
@@ -50,6 +53,27 @@
}
}
+status_t BpBufferHub::importBuffer(uint64_t token,
+ sp<IBufferClient>* outClient) {
+ Parcel data, reply;
+ status_t ret = NO_ERROR;
+ ret |= data.writeInterfaceToken(IBufferHub::getInterfaceDescriptor());
+ ret |= data.writeUint64(token);
+ if (ret != NO_ERROR) {
+ ALOGE("BpBufferHub::importBuffer: failed to write into parcel");
+ return ret;
+ }
+
+ ret = remote()->transact(IMPORT_BUFFER, data, &reply);
+ if (ret == NO_ERROR) {
+ *outClient = interface_cast<IBufferClient>(reply.readStrongBinder());
+ return NO_ERROR;
+ } else {
+ ALOGE("BpBufferHub::importBuffer: failed to transact; errno=%d", ret);
+ return ret;
+ }
+}
+
status_t BnBufferHub::onTransact(uint32_t code, const Parcel& data,
Parcel* reply, uint32_t flags) {
switch (code) {
@@ -65,6 +89,17 @@
usage, user_metadata_size);
return reply->writeStrongBinder(IInterface::asBinder(ret));
}
+ case IMPORT_BUFFER: {
+ CHECK_INTERFACE(IBufferHub, data, reply);
+ uint64_t token = data.readUint64();
+ sp<IBufferClient> client;
+ status_t ret = importBuffer(token, &client);
+ if (ret == NO_ERROR) {
+ return reply->writeStrongBinder(IInterface::asBinder(client));
+ } else {
+ return ret;
+ }
+ }
default:
// Should not reach except binder defined transactions such as dumpsys
return BBinder::onTransact(code, data, reply, flags);