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// Copyright 2018 The gVisor Authors.
//
// 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.
package p9
import (
"syscall"
"testing"
"gvisor.dev/gvisor/pkg/unet"
)
// TestVersion tests the version negotiation.
func TestVersion(t *testing.T) {
// First, create a new server and connection.
serverSocket, clientSocket, err := unet.SocketPair(false)
if err != nil {
t.Fatalf("socketpair got err %v expected nil", err)
}
defer clientSocket.Close()
// Create a new server and client.
s := NewServer(nil)
go s.Handle(serverSocket)
// NewClient does a Tversion exchange, so this is our test for success.
c, err := NewClient(clientSocket, DefaultMessageSize, HighestVersionString())
if err != nil {
t.Fatalf("got %v, expected nil", err)
}
// Check a bogus version string.
if err := c.sendRecv(&Tversion{Version: "notokay", MSize: DefaultMessageSize}, &Rversion{}); err != syscall.EINVAL {
t.Errorf("got %v expected %v", err, syscall.EINVAL)
}
// Check a bogus version number.
if err := c.sendRecv(&Tversion{Version: "9P1000.L", MSize: DefaultMessageSize}, &Rversion{}); err != syscall.EINVAL {
t.Errorf("got %v expected %v", err, syscall.EINVAL)
}
// Check a too high version number.
if err := c.sendRecv(&Tversion{Version: versionString(highestSupportedVersion + 1), MSize: DefaultMessageSize}, &Rversion{}); err != syscall.EAGAIN {
t.Errorf("got %v expected %v", err, syscall.EAGAIN)
}
// Check an invalid MSize.
if err := c.sendRecv(&Tversion{Version: versionString(highestSupportedVersion), MSize: 0}, &Rversion{}); err != syscall.EINVAL {
t.Errorf("got %v expected %v", err, syscall.EINVAL)
}
}
func benchmarkSendRecv(b *testing.B, fn func(c *Client) func(message, message) error) {
// See above.
serverSocket, clientSocket, err := unet.SocketPair(false)
if err != nil {
b.Fatalf("socketpair got err %v expected nil", err)
}
defer clientSocket.Close()
// See above.
s := NewServer(nil)
go s.Handle(serverSocket)
// See above.
c, err := NewClient(clientSocket, DefaultMessageSize, HighestVersionString())
if err != nil {
b.Fatalf("got %v, expected nil", err)
}
// Initialize messages.
sendRecv := fn(c)
tversion := &Tversion{
Version: versionString(highestSupportedVersion),
MSize: DefaultMessageSize,
}
rversion := new(Rversion)
// Run in a loop.
for i := 0; i < b.N; i++ {
if err := sendRecv(tversion, rversion); err != nil {
b.Fatalf("got unexpected err: %v", err)
}
}
}
func BenchmarkSendRecvLegacy(b *testing.B) {
benchmarkSendRecv(b, func(c *Client) func(message, message) error { return c.sendRecvLegacy })
}
func BenchmarkSendRecvChannel(b *testing.B) {
benchmarkSendRecv(b, func(c *Client) func(message, message) error { return c.sendRecvChannel })
}
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