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Lucas ManningandgVisor bot
33510ad9a9
This new method allows checking for the existence of assigned addresses without taking an extra reference that needs to be DecRefed. DecRef takes exclusive locks. Contention on the addressState lock causes performance issues when multiple goroutines are processing IP packets simultaneously. This isn't the case today since IP processing is single threaded, but will be eventually. PiperOrigin-RevId: 623567408
105 lines
3.5 KiB
Go
105 lines
3.5 KiB
Go
// Copyright 2020 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package stack_test
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import (
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"testing"
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"gvisor.dev/gvisor/pkg/tcpip"
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"gvisor.dev/gvisor/pkg/tcpip/stack"
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)
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// TestAddressableEndpointStateCleanup tests that cleaning up an addressable
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// endpoint state removes permanent addresses and leaves groups.
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func TestAddressableEndpointStateCleanup(t *testing.T) {
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var ep fakeNetworkEndpoint
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if err := ep.Enable(); err != nil {
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t.Fatalf("ep.Enable(): %s", err)
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}
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var s stack.AddressableEndpointState
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s.Init(&ep, stack.AddressableEndpointStateOptions{HiddenWhileDisabled: false})
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addr := tcpip.AddressWithPrefix{
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Address: tcpip.AddrFromSlice([]byte("\x01\x00\x00\x00")),
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PrefixLen: 32,
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}
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{
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properties := stack.AddressProperties{PEB: stack.NeverPrimaryEndpoint}
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ep, err := s.AddAndAcquirePermanentAddress(addr, properties)
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if err != nil {
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t.Fatalf("s.AddAndAcquirePermanentAddress(%s, %+v): %s", addr, properties, err)
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}
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// We don't need the address endpoint.
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ep.DecRef()
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}
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{
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ep := s.AcquireAssignedAddress(addr.Address, false /* allowTemp */, stack.NeverPrimaryEndpoint, true /* readOnly */)
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if ep == nil {
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t.Fatalf("got s.AcquireAssignedAddress(%s, false, NeverPrimaryEndpoint) = nil, want = non-nil", addr.Address)
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}
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}
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s.Cleanup()
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if ep := s.AcquireAssignedAddress(addr.Address, false /* allowTemp */, stack.NeverPrimaryEndpoint, true /* readOnly */); ep != nil {
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t.Fatalf("got s.AcquireAssignedAddress(%s, false, NeverPrimaryEndpoint) = %s, want = nil", addr.Address, ep.AddressWithPrefix())
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}
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}
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func TestAddressDispatcherExpiredToAssigned(t *testing.T) {
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var networkEp fakeNetworkEndpoint
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if err := networkEp.Enable(); err != nil {
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t.Fatalf("ep.Enable(): %s", err)
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}
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var s stack.AddressableEndpointState
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s.Init(&networkEp, stack.AddressableEndpointStateOptions{HiddenWhileDisabled: false})
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addr := tcpip.AddressWithPrefix{
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Address: tcpip.AddrFromSlice([]byte("\x01\x00\x00\x00")),
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PrefixLen: 32,
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}
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ep, err := s.AddAndAcquirePermanentAddress(addr, stack.AddressProperties{})
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if err != nil {
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t.Fatalf("s.AddAndAcquirePermanentAddress(%s, {}): %s", addr, err)
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}
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defer ep.DecRef()
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if !ep.TryIncRef() {
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t.Fatalf("failed to increase ref count of address endpoint")
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}
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if err := s.RemovePermanentEndpoint(ep, stack.AddressRemovalManualAction); err != nil {
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ep.DecRef()
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t.Fatalf("s.RemovePermanentEndpoint(ep, stack.AddressRemovalManualAction): %s", err)
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}
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addrDisp := &addressDispatcher{
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changedCh: make(chan addressChangedEvent, 1),
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removedCh: make(chan stack.AddressRemovalReason, 1),
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addr: addr,
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}
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properties := stack.AddressProperties{Disp: addrDisp}
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readdedEp, err := s.AddAndAcquirePermanentAddress(addr, properties)
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if err != nil {
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t.Fatalf("s.AddAndAcquirePermanentAddress(%s, %+v): %s", addr, properties, err)
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}
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defer readdedEp.DecRef()
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if err := addrDisp.expectChanged(stack.AddressLifetimes{}, stack.AddressAssigned); err != nil {
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t.Fatalf("expect to observe address added: %s", err)
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}
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}
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