Merge "Add FuseBridgeLoop to libappfuse." (de21fbb3) · Commits · e / os / android_system_core

libappfuse/Android.bp

+2 −2

Original line number	Diff line number	Diff line
		@@ -15,12 +15,12 @@ cc_library_shared {
		name: "libappfuse",
		defaults: ["libappfuse_defaults"],
		export_include_dirs: ["include"],
		srcs: ["AppFuse.cc"]
		srcs: ["FuseBuffer.cc", "FuseBridgeLoop.cc"]
		}

		cc_test {
		name: "libappfuse_test",
		defaults: ["libappfuse_defaults"],
		shared_libs: ["libappfuse"],
		srcs: ["tests/AppFuseTest.cc"]
		srcs: ["tests/FuseBridgeLoopTest.cc", "tests/FuseBufferTest.cc"]
		}

libappfuse/FuseBridgeLoop.cc

0 → 100644

+79 −0

Original line number	Diff line number	Diff line
		/*
		* 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 specic language governing permissions and
		* limitations under the License.
		*/

		#include "libappfuse/FuseBridgeLoop.h"

		#include <android-base/logging.h>
		#include <android-base/unique_fd.h>

		namespace android {

		bool FuseBridgeLoop::Start(
		int raw_dev_fd, int raw_proxy_fd, FuseBridgeLoop::Callback* callback) {
		base::unique_fd dev_fd(raw_dev_fd);
		base::unique_fd proxy_fd(raw_proxy_fd);

		LOG(DEBUG) << "Start fuse loop.";
		while (true) {
		if (!buffer_.request.Read(dev_fd)) {
		return false;
		}

		const uint32_t opcode = buffer_.request.header.opcode;
		LOG(VERBOSE) << "Read a fuse packet, opcode=" << opcode;
		switch (opcode) {
		case FUSE_FORGET:
		// Do not reply to FUSE_FORGET.
		continue;

		case FUSE_LOOKUP:
		case FUSE_GETATTR:
		case FUSE_OPEN:
		case FUSE_READ:
		case FUSE_WRITE:
		case FUSE_RELEASE:
		case FUSE_FLUSH:
		if (!buffer_.request.Write(proxy_fd)) {
		LOG(ERROR) << "Failed to write a request to the proxy.";
		return false;
		}
		if (!buffer_.response.Read(proxy_fd)) {
		LOG(ERROR) << "Failed to read a response from the proxy.";
		return false;
		}
		break;

		case FUSE_INIT:
		buffer_.HandleInit();
		break;

		default:
		buffer_.HandleNotImpl();
		break;
		}

		if (!buffer_.response.Write(dev_fd)) {
		LOG(ERROR) << "Failed to write a response to the device.";
		return false;
		}

		if (opcode == FUSE_INIT) {
		callback->OnMount();
		}
		}
		}

		} // namespace android

libappfuse/AppFuse.cc→libappfuse/FuseBuffer.cc

+1 −1

Original line number	Diff line number	Diff line
		@@ -14,7 +14,7 @@
		* limitations under the License.
		*/

		#include "libappfuse/AppFuse.h"
		#include "libappfuse/FuseBuffer.h"

		#include <inttypes.h>
		#include <string.h>

libappfuse/include/libappfuse/FuseBridgeLoop.h

0 → 100644

+40 −0

Original line number	Diff line number	Diff line
		/*
		* 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 specic language governing permissions and
		* limitations under the License.
		*/

		#ifndef ANDROID_LIBAPPFUSE_FUSEBRIDGELOOP_H_
		#define ANDROID_LIBAPPFUSE_FUSEBRIDGELOOP_H_

		#include "libappfuse/FuseBuffer.h"

		namespace android {

		class FuseBridgeLoop {
		public:
		class Callback {
		public:
		virtual void OnMount() = 0;
		virtual ~Callback() = default;
		};

		bool Start(int dev_fd, int proxy_fd, Callback* callback);

		private:
		FuseBuffer buffer_;
		};

		} // namespace android

		#endif // ANDROID_LIBAPPFUSE_FUSEBRIDGELOOP_H_

libappfuse/include/libappfuse/AppFuse.h→libappfuse/include/libappfuse/FuseBuffer.h

+17 −4

Original line number	Diff line number	Diff line
		@@ -14,8 +14,8 @@
		* limitations under the License.
		*/

		#ifndef ANDROID_LIBAPPFUSE_APPFUSE_H_
		#define ANDROID_LIBAPPFUSE_APPFUSE_H_
		#ifndef ANDROID_LIBAPPFUSE_FUSEBUFFER_H_
		#define ANDROID_LIBAPPFUSE_FUSEBUFFER_H_

		#include <linux/fuse.h>

		@@ -46,7 +46,7 @@ struct FuseRequest : public FuseMessage<FuseRequest, fuse_in_header> {
		fuse_open_in open_in;
		fuse_init_in init_in;
		fuse_read_in read_in;
		char lookup_name[];
		char lookup_name[0];
		};
		};

		@@ -71,6 +71,19 @@ union FuseBuffer {
		void HandleNotImpl();
		};

		class FuseProxyLoop {
		class IFuseProxyLoopCallback {
		public:
		virtual void OnMount() = 0;
		virtual ~IFuseProxyLoopCallback() = default;
		};

		bool Start(int dev_fd, int proxy_fd, IFuseProxyLoopCallback* callback);

		private:
		FuseBuffer buffer_;
		};

		} // namespace android

		#endif // ANDROID_LIBAPPFUSE_APPFUSE_H_
		#endif // ANDROID_LIBAPPFUSE_FUSEBUFFER_H_