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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 specic language governing permissions and
* limitations under the License.
*/
#include "libappfuse/FuseBridgeLoop.h"
#include <sys/socket.h>
#include <sstream>
#include <thread>
#include <android-base/logging.h>
#include <android-base/unique_fd.h>
#include <gtest/gtest.h>
namespace android {
namespace fuse {
namespace {
class Callback : public FuseBridgeLoopCallback {
public:
bool mounted;
bool closed;
Callback() : mounted(false), closed(false) {}
void OnMount(int /*mount_id*/) override { mounted = true; }
void OnClosed(int /* mount_id */) override { closed = true; }
};
class FuseBridgeLoopTest : public ::testing::Test {
protected:
base::unique_fd dev_sockets_[2];
base::unique_fd proxy_sockets_[2];
Callback callback_;
std::thread thread_;
FuseRequest request_;
FuseResponse response_;
void SetUp() override {
base::SetMinimumLogSeverity(base::VERBOSE);
ASSERT_TRUE(SetupMessageSockets(&dev_sockets_));
ASSERT_TRUE(SetupMessageSockets(&proxy_sockets_));
thread_ = std::thread([this] {
FuseBridgeLoop loop;
loop.AddBridge(1, std::move(dev_sockets_[1]), std::move(proxy_sockets_[0]));
loop.Start(&callback_);
});
}
void CheckNotImpl(uint32_t opcode) {
SCOPED_TRACE((std::ostringstream() << "opcode: " << opcode).str());
memset(&request_, 0, sizeof(FuseRequest));
request_.header.opcode = opcode;
request_.header.len = sizeof(fuse_in_header);
request_.header.unique = 1;
ASSERT_TRUE(request_.Write(dev_sockets_[0]));
memset(&response_, 0, sizeof(FuseResponse));
ASSERT_TRUE(response_.Read(dev_sockets_[0]));
EXPECT_EQ(-ENOSYS, response_.header.error);
}
void CheckProxy(uint32_t opcode) {
SCOPED_TRACE((std::ostringstream() << "opcode: " << opcode).str());
memset(&request_, 0, sizeof(FuseRequest));
request_.header.opcode = opcode;
request_.header.unique = opcode; // Use opcode as unique.
request_.header.len = sizeof(fuse_in_header);
ASSERT_TRUE(request_.Write(dev_sockets_[0]));
memset(&request_, 0, sizeof(FuseRequest));
ASSERT_TRUE(request_.Read(proxy_sockets_[1]));
EXPECT_EQ(opcode, request_.header.opcode);
EXPECT_EQ(opcode, request_.header.unique);
memset(&response_, 0, sizeof(FuseResponse));
response_.header.len = sizeof(fuse_out_header);
response_.header.unique = opcode; // Use opcode as unique.
response_.header.error = kFuseSuccess;
ASSERT_TRUE(response_.Write(proxy_sockets_[1]));
memset(&response_, 0, sizeof(FuseResponse));
ASSERT_TRUE(response_.Read(dev_sockets_[0]));
EXPECT_EQ(opcode, response_.header.unique);
EXPECT_EQ(kFuseSuccess, response_.header.error);
}
void SendInitRequest(uint64_t unique) {
memset(&request_, 0, sizeof(FuseRequest));
request_.header.opcode = FUSE_INIT;
request_.header.unique = unique;
request_.header.len = sizeof(fuse_in_header) + sizeof(fuse_init_in);
request_.init_in.major = FUSE_KERNEL_VERSION;
request_.init_in.minor = FUSE_KERNEL_MINOR_VERSION;
ASSERT_TRUE(request_.Write(dev_sockets_[0]));
}
void Close() {
dev_sockets_[0].reset();
dev_sockets_[1].reset();
proxy_sockets_[0].reset();
proxy_sockets_[1].reset();
if (thread_.joinable()) {
thread_.join();
}
ASSERT_TRUE(callback_.closed);
}
void TearDown() override {
Close();
}
};
} // namespace
TEST_F(FuseBridgeLoopTest, FuseInit) {
SendInitRequest(1u);
memset(&response_, 0, sizeof(FuseResponse));
ASSERT_TRUE(response_.Read(dev_sockets_[0]));
EXPECT_EQ(kFuseSuccess, response_.header.error);
EXPECT_EQ(1u, response_.header.unique);
// Unmount.
Close();
EXPECT_TRUE(callback_.mounted);
}
TEST_F(FuseBridgeLoopTest, FuseForget) {
memset(&request_, 0, sizeof(FuseRequest));
request_.header.opcode = FUSE_FORGET;
request_.header.unique = 1u;
request_.header.len = sizeof(fuse_in_header) + sizeof(fuse_forget_in);
ASSERT_TRUE(request_.Write(dev_sockets_[0]));
SendInitRequest(2u);
memset(&response_, 0, sizeof(FuseResponse));
ASSERT_TRUE(response_.Read(dev_sockets_[0]));
EXPECT_EQ(2u, response_.header.unique) <<
"The loop must not respond to FUSE_FORGET";
}
TEST_F(FuseBridgeLoopTest, FuseNotImpl) {
CheckNotImpl(FUSE_SETATTR);
CheckNotImpl(FUSE_READLINK);
CheckNotImpl(FUSE_SYMLINK);
CheckNotImpl(FUSE_MKNOD);
CheckNotImpl(FUSE_MKDIR);
CheckNotImpl(FUSE_UNLINK);
CheckNotImpl(FUSE_RMDIR);
CheckNotImpl(FUSE_RENAME);
CheckNotImpl(FUSE_LINK);
CheckNotImpl(FUSE_STATFS);
CheckNotImpl(FUSE_SETXATTR);
CheckNotImpl(FUSE_GETXATTR);
CheckNotImpl(FUSE_LISTXATTR);
CheckNotImpl(FUSE_REMOVEXATTR);
CheckNotImpl(FUSE_FLUSH);
CheckNotImpl(FUSE_OPENDIR);
CheckNotImpl(FUSE_READDIR);
CheckNotImpl(FUSE_RELEASEDIR);
CheckNotImpl(FUSE_FSYNCDIR);
CheckNotImpl(FUSE_GETLK);
CheckNotImpl(FUSE_SETLK);
CheckNotImpl(FUSE_SETLKW);
CheckNotImpl(FUSE_ACCESS);
CheckNotImpl(FUSE_CREATE);
CheckNotImpl(FUSE_INTERRUPT);
CheckNotImpl(FUSE_BMAP);
CheckNotImpl(FUSE_DESTROY);
CheckNotImpl(FUSE_IOCTL);
CheckNotImpl(FUSE_POLL);
CheckNotImpl(FUSE_NOTIFY_REPLY);
CheckNotImpl(FUSE_BATCH_FORGET);
CheckNotImpl(FUSE_FALLOCATE);
CheckNotImpl(FUSE_READDIRPLUS);
CheckNotImpl(FUSE_RENAME2);
CheckNotImpl(FUSE_LSEEK);
}
TEST_F(FuseBridgeLoopTest, Proxy) {
CheckProxy(FUSE_LOOKUP);
CheckProxy(FUSE_GETATTR);
CheckProxy(FUSE_READ);
CheckProxy(FUSE_WRITE);
CheckProxy(FUSE_FSYNC);
// Invoke FUSE_OPEN and FUSE_RELEASE at last as the loop will exit when all files are closed.
CheckProxy(FUSE_OPEN);
CheckProxy(FUSE_RELEASE);
// Ensure the loop exits.
Close();
}
} // namespace fuse
} // namespace android
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