bump CSI spec to next version

and fix the build failure

go.mod

@@ -3,7 +3,7 @@ module github.com/kubernetes-csi/csi-driver-host-path
 go 1.21
 
 require (
-	github.com/container-storage-interface/spec v1.9.0
+	github.com/container-storage-interface/spec v1.9.1-0.20240314114506-2696773158b9
 	github.com/golang/glog v1.2.1
 	github.com/golang/protobuf v1.5.4
 	github.com/kubernetes-csi/csi-lib-utils v0.17.0

go.sum

@@ -4,8 +4,8 @@ github.com/blang/semver/v4 v4.0.0 h1:1PFHFE6yCCTv8C1TeyNNarDzntLi7wMI5i/pzqYIsAM
 github.com/blang/semver/v4 v4.0.0/go.mod h1:IbckMUScFkM3pff0VJDNKRiT6TG/YpiHIM2yvyW5YoQ=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/container-storage-interface/spec v1.9.0 h1:zKtX4STsq31Knz3gciCYCi1SXtO2HJDecIjDVboYavY=
-github.com/container-storage-interface/spec v1.9.0/go.mod h1:ZfDu+3ZRyeVqxZM0Ds19MVLkN2d1XJ5MAfi1L3VjlT0=
+github.com/container-storage-interface/spec v1.9.1-0.20240314114506-2696773158b9 h1:5UgaRsvTkHbRDuDjMIC48samtUi8eHil0fzTutNLXLo=
+github.com/container-storage-interface/spec v1.9.1-0.20240314114506-2696773158b9/go.mod h1:BoqFHNGrbQQUw8a2TOr2IFMWlfGStBwfh6RU1dqS6k8=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

pkg/hostpath/hostpath.go

@@ -25,6 +25,7 @@ import (
 	"path/filepath"
 	"sync"
 
+	"github.com/container-storage-interface/spec/lib/go/csi"
 	"github.com/golang/glog"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -49,6 +50,10 @@ const (
 )
 
 type hostPath struct {
+	csi.UnimplementedIdentityServer
+	csi.UnimplementedControllerServer
+	csi.UnimplementedNodeServer
+	csi.UnimplementedGroupControllerServer
 	config Config
 
 	// gRPC calls involving any of the fields below must be serialized