From c1ce1e00ee9306aa508b537b490b236a21f52152 Mon Sep 17 00:00:00 2001
From: Dan Winship <danwinship@redhat.com>
Date: Mon, 18 Dec 2023 20:12:51 -0500
Subject: [PATCH] Properly build-tag the Linux kube-proxy backend code

This had to be able to build on OS X before to make verify-typecheck
pass, but now that that's fixed we can tag the code properly as being
linux-only.
---
 .../app/{init_others.go => init_linux.go}     |  4 +-
 .../app/{server_others.go => server_linux.go} |  4 +-
 ...er_others_test.go => server_linux_test.go} |  4 +-
 pkg/proxy/conntrack/cleanup.go                |  3 +
 pkg/proxy/conntrack/conntrack.go              |  3 +
 pkg/proxy/conntrack/conntrack_test.go         |  3 +
 .../iptables/number_generated_rules_test.go   |  3 +
 pkg/proxy/iptables/proxier.go                 |  3 +
 pkg/proxy/iptables/proxier_test.go            |  3 +
 pkg/proxy/ipvs/graceful_termination.go        |  3 +
 pkg/proxy/ipvs/graceful_termination_test.go   |  4 +-
 pkg/proxy/ipvs/ipset.go                       |  3 +
 pkg/proxy/ipvs/ipset/ipset.go                 |  3 +
 pkg/proxy/ipvs/ipset/ipset_test.go            |  3 +
 pkg/proxy/ipvs/ipset/testing/fake.go          |  3 +
 pkg/proxy/ipvs/ipset/testing/fake_test.go     |  3 +
 pkg/proxy/ipvs/ipset/types.go                 |  3 +
 pkg/proxy/ipvs/ipset_test.go                  |  4 +-
 pkg/proxy/ipvs/netlink_unsupported.go         | 82 -------------------
 pkg/proxy/ipvs/proxier.go                     |  3 +
 pkg/proxy/ipvs/proxier_test.go                |  4 +-
 pkg/proxy/ipvs/testing/fake.go                |  3 +
 pkg/proxy/ipvs/testing/fake_test.go           |  3 +
 pkg/proxy/ipvs/testing/util.go                |  3 +
 pkg/proxy/ipvs/util/ipvs.go                   |  3 +
 pkg/proxy/ipvs/util/ipvs_test.go              |  3 +
 pkg/proxy/ipvs/util/ipvs_unsupported.go       | 79 ------------------
 pkg/proxy/ipvs/util/testing/fake.go           |  3 +
 pkg/proxy/ipvs/util/testing/fake_test.go      |  3 +
 pkg/proxy/nftables/helpers_test.go            |  3 +
 pkg/proxy/nftables/proxier.go                 |  3 +
 pkg/proxy/nftables/proxier_test.go            |  3 +
 pkg/util/iptables/iptables.go                 |  3 +
 pkg/util/iptables/iptables_unsupported.go     | 33 --------
 pkg/util/iptables/save_restore.go             |  3 +
 pkg/util/iptables/save_restore_test.go        |  3 +
 pkg/util/iptables/testing/fake.go             |  3 +
 pkg/util/iptables/testing/fake_test.go        |  3 +
 pkg/util/iptables/testing/parse.go            |  3 +
 pkg/util/iptables/testing/parse_test.go       |  3 +
 40 files changed, 105 insertions(+), 206 deletions(-)
 rename cmd/kube-proxy/app/{init_others.go => init_linux.go} (94%)
 rename cmd/kube-proxy/app/{server_others.go => server_linux.go} (99%)
 rename cmd/kube-proxy/app/{server_others_test.go => server_linux_test.go} (99%)
 delete mode 100644 pkg/proxy/ipvs/netlink_unsupported.go
 delete mode 100644 pkg/proxy/ipvs/util/ipvs_unsupported.go
 delete mode 100644 pkg/util/iptables/iptables_unsupported.go

diff --git a/cmd/kube-proxy/app/init_others.go b/cmd/kube-proxy/app/init_linux.go
similarity index 94%
rename from cmd/kube-proxy/app/init_others.go
rename to cmd/kube-proxy/app/init_linux.go
index cee69f1a0eb..7e0ff787fe1 100644
--- a/cmd/kube-proxy/app/init_others.go
+++ b/cmd/kube-proxy/app/init_linux.go
@@ -1,5 +1,5 @@
-//go:build !windows
-// +build !windows
+//go:build linux
+// +build linux
 
 /*
 Copyright 2018 The Kubernetes Authors.
diff --git a/cmd/kube-proxy/app/server_others.go b/cmd/kube-proxy/app/server_linux.go
similarity index 99%
rename from cmd/kube-proxy/app/server_others.go
rename to cmd/kube-proxy/app/server_linux.go
index 9d90ca92fa5..b91adaf5154 100644
--- a/cmd/kube-proxy/app/server_others.go
+++ b/cmd/kube-proxy/app/server_linux.go
@@ -1,5 +1,5 @@
-//go:build !windows
-// +build !windows
+//go:build linux
+// +build linux
 
 /*
 Copyright 2014 The Kubernetes Authors.
diff --git a/cmd/kube-proxy/app/server_others_test.go b/cmd/kube-proxy/app/server_linux_test.go
similarity index 99%
rename from cmd/kube-proxy/app/server_others_test.go
rename to cmd/kube-proxy/app/server_linux_test.go
index 959e2972b01..ec47c5d6c48 100644
--- a/cmd/kube-proxy/app/server_others_test.go
+++ b/cmd/kube-proxy/app/server_linux_test.go
@@ -1,5 +1,5 @@
-//go:build !windows
-// +build !windows
+//go:build linux
+// +build linux
 
 /*
 Copyright 2018 The Kubernetes Authors.
diff --git a/pkg/proxy/conntrack/cleanup.go b/pkg/proxy/conntrack/cleanup.go
index 4d25ff2f861..f99ab89770a 100644
--- a/pkg/proxy/conntrack/cleanup.go
+++ b/pkg/proxy/conntrack/cleanup.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2023 The Kubernetes Authors.
 
diff --git a/pkg/proxy/conntrack/conntrack.go b/pkg/proxy/conntrack/conntrack.go
index 450ca1dda3a..3a1925b8675 100644
--- a/pkg/proxy/conntrack/conntrack.go
+++ b/pkg/proxy/conntrack/conntrack.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2016 The Kubernetes Authors.
 
diff --git a/pkg/proxy/conntrack/conntrack_test.go b/pkg/proxy/conntrack/conntrack_test.go
index 18a7aab4e7b..a4b17ca5b07 100644
--- a/pkg/proxy/conntrack/conntrack_test.go
+++ b/pkg/proxy/conntrack/conntrack_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2015 The Kubernetes Authors.
 
diff --git a/pkg/proxy/iptables/number_generated_rules_test.go b/pkg/proxy/iptables/number_generated_rules_test.go
index e160d5407f1..959b3f165cb 100644
--- a/pkg/proxy/iptables/number_generated_rules_test.go
+++ b/pkg/proxy/iptables/number_generated_rules_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2022 The Kubernetes Authors.
 
diff --git a/pkg/proxy/iptables/proxier.go b/pkg/proxy/iptables/proxier.go
index 1109e096324..d673519b859 100644
--- a/pkg/proxy/iptables/proxier.go
+++ b/pkg/proxy/iptables/proxier.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2015 The Kubernetes Authors.
 
diff --git a/pkg/proxy/iptables/proxier_test.go b/pkg/proxy/iptables/proxier_test.go
index e0d5e236fcf..32ab725fd4d 100644
--- a/pkg/proxy/iptables/proxier_test.go
+++ b/pkg/proxy/iptables/proxier_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2015 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/graceful_termination.go b/pkg/proxy/ipvs/graceful_termination.go
index 5c873af5230..45eaebb5158 100644
--- a/pkg/proxy/ipvs/graceful_termination.go
+++ b/pkg/proxy/ipvs/graceful_termination.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2015 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/graceful_termination_test.go b/pkg/proxy/ipvs/graceful_termination_test.go
index f3b5ba971c1..9d04894731f 100644
--- a/pkg/proxy/ipvs/graceful_termination_test.go
+++ b/pkg/proxy/ipvs/graceful_termination_test.go
@@ -1,5 +1,5 @@
-//go:build !windows
-// +build !windows
+//go:build linux
+// +build linux
 
 /*
 Copyright 2019 The Kubernetes Authors.
diff --git a/pkg/proxy/ipvs/ipset.go b/pkg/proxy/ipvs/ipset.go
index 5147c112c4f..056f80ca03d 100644
--- a/pkg/proxy/ipvs/ipset.go
+++ b/pkg/proxy/ipvs/ipset.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/ipset/ipset.go b/pkg/proxy/ipvs/ipset/ipset.go
index f6532dc090e..2957340d937 100644
--- a/pkg/proxy/ipvs/ipset/ipset.go
+++ b/pkg/proxy/ipvs/ipset/ipset.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/ipset/ipset_test.go b/pkg/proxy/ipvs/ipset/ipset_test.go
index 8f45227abf2..130bc4ca876 100644
--- a/pkg/proxy/ipvs/ipset/ipset_test.go
+++ b/pkg/proxy/ipvs/ipset/ipset_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/ipset/testing/fake.go b/pkg/proxy/ipvs/ipset/testing/fake.go
index a94c709de79..84377a832ee 100644
--- a/pkg/proxy/ipvs/ipset/testing/fake.go
+++ b/pkg/proxy/ipvs/ipset/testing/fake.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/ipset/testing/fake_test.go b/pkg/proxy/ipvs/ipset/testing/fake_test.go
index 0d07dfa9e0f..a77215ae6a7 100644
--- a/pkg/proxy/ipvs/ipset/testing/fake_test.go
+++ b/pkg/proxy/ipvs/ipset/testing/fake_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/ipset/types.go b/pkg/proxy/ipvs/ipset/types.go
index 11f98d712c4..45632d27894 100644
--- a/pkg/proxy/ipvs/ipset/types.go
+++ b/pkg/proxy/ipvs/ipset/types.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/ipset_test.go b/pkg/proxy/ipvs/ipset_test.go
index dafde0b4808..6f5842f2e96 100644
--- a/pkg/proxy/ipvs/ipset_test.go
+++ b/pkg/proxy/ipvs/ipset_test.go
@@ -1,5 +1,5 @@
-//go:build !windows
-// +build !windows
+//go:build linux
+// +build linux
 
 /*
 Copyright 2017 The Kubernetes Authors.
diff --git a/pkg/proxy/ipvs/netlink_unsupported.go b/pkg/proxy/ipvs/netlink_unsupported.go
deleted file mode 100644
index 1cb38d3fb8f..00000000000
--- a/pkg/proxy/ipvs/netlink_unsupported.go
+++ /dev/null
@@ -1,82 +0,0 @@
-//go:build !linux
-// +build !linux
-
-/*
-Copyright 2017 The Kubernetes 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 ipvs
-
-import (
-	"fmt"
-	"net"
-
-	"k8s.io/apimachinery/pkg/util/sets"
-)
-
-// The type must match the one in proxier_test.go
-type netlinkHandle struct {
-	isIPv6 bool
-}
-
-// NewNetLinkHandle will create an EmptyHandle
-func NewNetLinkHandle(ipv6 bool) NetLinkHandle {
-	return &netlinkHandle{}
-}
-
-// EnsureAddressBind checks if address is bound to the interface and, if not, binds it. If the address is already bound, return true.
-func (h *netlinkHandle) EnsureAddressBind(address, devName string) (exist bool, err error) {
-	return false, fmt.Errorf("netlink not supported for this platform")
-}
-
-// UnbindAddress unbind address from the interface
-func (h *netlinkHandle) UnbindAddress(address, devName string) error {
-	return fmt.Errorf("netlink not supported for this platform")
-}
-
-// EnsureDummyDevice is part of interface
-func (h *netlinkHandle) EnsureDummyDevice(devName string) (bool, error) {
-	return false, fmt.Errorf("netlink is not supported in this platform")
-}
-
-// DeleteDummyDevice is part of interface.
-func (h *netlinkHandle) DeleteDummyDevice(devName string) error {
-	return fmt.Errorf("netlink is not supported in this platform")
-}
-
-// ListBindAddress is part of interface.
-func (h *netlinkHandle) ListBindAddress(devName string) ([]string, error) {
-	return nil, fmt.Errorf("netlink is not supported in this platform")
-}
-
-// GetAllLocalAddresses is part of interface.
-func (h *netlinkHandle) GetAllLocalAddresses() (sets.Set[string], error) {
-	return nil, fmt.Errorf("netlink is not supported in this platform")
-}
-
-// GetLocalAddresses is part of interface.
-func (h *netlinkHandle) GetLocalAddresses(dev string) (sets.Set[string], error) {
-	return nil, fmt.Errorf("netlink is not supported in this platform")
-}
-
-// GetAllLocalAddressesExcept is part of interface.
-func (h *netlinkHandle) GetAllLocalAddressesExcept(dev string) (sets.Set[string], error) {
-	return nil, fmt.Errorf("netlink is not supported in this platform")
-}
-
-// Must match the one in proxier_test.go
-func (h *netlinkHandle) isValidForSet(ip net.IP) bool {
-	return false
-}
diff --git a/pkg/proxy/ipvs/proxier.go b/pkg/proxy/ipvs/proxier.go
index 05afd762045..f3f5f8813fa 100644
--- a/pkg/proxy/ipvs/proxier.go
+++ b/pkg/proxy/ipvs/proxier.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/proxier_test.go b/pkg/proxy/ipvs/proxier_test.go
index eebd10256ea..360fc051782 100644
--- a/pkg/proxy/ipvs/proxier_test.go
+++ b/pkg/proxy/ipvs/proxier_test.go
@@ -1,5 +1,5 @@
-//go:build !windows
-// +build !windows
+//go:build linux
+// +build linux
 
 /*
 Copyright 2017 The Kubernetes Authors.
diff --git a/pkg/proxy/ipvs/testing/fake.go b/pkg/proxy/ipvs/testing/fake.go
index b0cdce8abd1..cd5958ccd53 100644
--- a/pkg/proxy/ipvs/testing/fake.go
+++ b/pkg/proxy/ipvs/testing/fake.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/testing/fake_test.go b/pkg/proxy/ipvs/testing/fake_test.go
index bba5503f386..227facceb0c 100644
--- a/pkg/proxy/ipvs/testing/fake_test.go
+++ b/pkg/proxy/ipvs/testing/fake_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/testing/util.go b/pkg/proxy/ipvs/testing/util.go
index cd3bb7ebf0f..599532e1d89 100644
--- a/pkg/proxy/ipvs/testing/util.go
+++ b/pkg/proxy/ipvs/testing/util.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/util/ipvs.go b/pkg/proxy/ipvs/util/ipvs.go
index c9b2ff4b332..ac8853c4406 100644
--- a/pkg/proxy/ipvs/util/ipvs.go
+++ b/pkg/proxy/ipvs/util/ipvs.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/util/ipvs_test.go b/pkg/proxy/ipvs/util/ipvs_test.go
index 8aaedb1afd0..7cf3b25d615 100644
--- a/pkg/proxy/ipvs/util/ipvs_test.go
+++ b/pkg/proxy/ipvs/util/ipvs_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/util/ipvs_unsupported.go b/pkg/proxy/ipvs/util/ipvs_unsupported.go
deleted file mode 100644
index 74d821561d9..00000000000
--- a/pkg/proxy/ipvs/util/ipvs_unsupported.go
+++ /dev/null
@@ -1,79 +0,0 @@
-//go:build !linux
-// +build !linux
-
-/*
-Copyright 2017 The Kubernetes 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 ipvs
-
-import (
-	"fmt"
-	"time"
-)
-
-// New returns a dummy Interface for unsupported platform.
-func New() Interface {
-	return &runner{}
-}
-
-type runner struct {
-}
-
-func (runner *runner) Flush() error {
-	return fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) AddVirtualServer(*VirtualServer) error {
-	return fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) UpdateVirtualServer(*VirtualServer) error {
-	return fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) DeleteVirtualServer(*VirtualServer) error {
-	return fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) GetVirtualServer(*VirtualServer) (*VirtualServer, error) {
-	return nil, fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) GetVirtualServers() ([]*VirtualServer, error) {
-	return nil, fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) AddRealServer(*VirtualServer, *RealServer) error {
-	return fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) GetRealServers(*VirtualServer) ([]*RealServer, error) {
-	return nil, fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) DeleteRealServer(*VirtualServer, *RealServer) error {
-	return fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) UpdateRealServer(*VirtualServer, *RealServer) error {
-	return fmt.Errorf("IPVS not supported for this platform")
-}
-
-func (runner *runner) ConfigureTimeouts(time.Duration, time.Duration, time.Duration) error {
-	return fmt.Errorf("IPVS not supported for this platform")
-}
-
-var _ = Interface(&runner{})
diff --git a/pkg/proxy/ipvs/util/testing/fake.go b/pkg/proxy/ipvs/util/testing/fake.go
index dc80cf38eec..2d946517d04 100644
--- a/pkg/proxy/ipvs/util/testing/fake.go
+++ b/pkg/proxy/ipvs/util/testing/fake.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/ipvs/util/testing/fake_test.go b/pkg/proxy/ipvs/util/testing/fake_test.go
index ec48e17784b..69aac3b1c85 100644
--- a/pkg/proxy/ipvs/util/testing/fake_test.go
+++ b/pkg/proxy/ipvs/util/testing/fake_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2017 The Kubernetes Authors.
 
diff --git a/pkg/proxy/nftables/helpers_test.go b/pkg/proxy/nftables/helpers_test.go
index b5286b952a3..05c51caa822 100644
--- a/pkg/proxy/nftables/helpers_test.go
+++ b/pkg/proxy/nftables/helpers_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2015 The Kubernetes Authors.
 
diff --git a/pkg/proxy/nftables/proxier.go b/pkg/proxy/nftables/proxier.go
index 57374f5ce20..1ebba166724 100644
--- a/pkg/proxy/nftables/proxier.go
+++ b/pkg/proxy/nftables/proxier.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2015 The Kubernetes Authors.
 
diff --git a/pkg/proxy/nftables/proxier_test.go b/pkg/proxy/nftables/proxier_test.go
index c5ea7db8760..10f8c11f9e0 100644
--- a/pkg/proxy/nftables/proxier_test.go
+++ b/pkg/proxy/nftables/proxier_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2015 The Kubernetes Authors.
 
diff --git a/pkg/util/iptables/iptables.go b/pkg/util/iptables/iptables.go
index 8533a1ca624..c6c64e45f73 100644
--- a/pkg/util/iptables/iptables.go
+++ b/pkg/util/iptables/iptables.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2014 The Kubernetes Authors.
 
diff --git a/pkg/util/iptables/iptables_unsupported.go b/pkg/util/iptables/iptables_unsupported.go
deleted file mode 100644
index 0c7c5ee3e65..00000000000
--- a/pkg/util/iptables/iptables_unsupported.go
+++ /dev/null
@@ -1,33 +0,0 @@
-//go:build !linux
-// +build !linux
-
-/*
-Copyright 2017 The Kubernetes 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 iptables
-
-import (
-	"fmt"
-	"os"
-)
-
-func grabIptablesLocks(lock14filePath, lock16filePath string) (iptablesLocker, error) {
-	return nil, fmt.Errorf("iptables unsupported on this platform")
-}
-
-func grabIptablesFileLock(f *os.File) error {
-	return fmt.Errorf("iptables unsupported on this platform")
-}
diff --git a/pkg/util/iptables/save_restore.go b/pkg/util/iptables/save_restore.go
index d61de34c16a..d507adde737 100644
--- a/pkg/util/iptables/save_restore.go
+++ b/pkg/util/iptables/save_restore.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2014 The Kubernetes Authors.
 
diff --git a/pkg/util/iptables/save_restore_test.go b/pkg/util/iptables/save_restore_test.go
index 1030f6194c5..26da4bb3e1c 100644
--- a/pkg/util/iptables/save_restore_test.go
+++ b/pkg/util/iptables/save_restore_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2018 The Kubernetes Authors.
 
diff --git a/pkg/util/iptables/testing/fake.go b/pkg/util/iptables/testing/fake.go
index 10c91b3021e..6152113dd15 100644
--- a/pkg/util/iptables/testing/fake.go
+++ b/pkg/util/iptables/testing/fake.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2015 The Kubernetes Authors.
 
diff --git a/pkg/util/iptables/testing/fake_test.go b/pkg/util/iptables/testing/fake_test.go
index a20917c036d..b2edaa59549 100644
--- a/pkg/util/iptables/testing/fake_test.go
+++ b/pkg/util/iptables/testing/fake_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2022 The Kubernetes Authors.
 
diff --git a/pkg/util/iptables/testing/parse.go b/pkg/util/iptables/testing/parse.go
index c46adfafac0..d7957e8c760 100644
--- a/pkg/util/iptables/testing/parse.go
+++ b/pkg/util/iptables/testing/parse.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2022 The Kubernetes Authors.
 
diff --git a/pkg/util/iptables/testing/parse_test.go b/pkg/util/iptables/testing/parse_test.go
index c439ef61fcd..848b27e4021 100644
--- a/pkg/util/iptables/testing/parse_test.go
+++ b/pkg/util/iptables/testing/parse_test.go
@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 /*
 Copyright 2022 The Kubernetes Authors.