From 66c41fe008b1256688ab31d9ea32cde636d2d1a8 Mon Sep 17 00:00:00 2001
From: Aaron Prindle <aprindle@google.com>
Date: Mon, 17 Jul 2017 10:00:41 -0700
Subject: [PATCH] Added msize and 9p-version flags to mount.  Also changed
 their defaults to be more usable

---
 cmd/minikube/cmd/mount.go           |  8 ++++++--
 pkg/minikube/cluster/cluster.go     |  4 ++--
 pkg/minikube/cluster/commands.go    | 28 ++++++++++++++++------------
 pkg/minikube/constants/constants.go |  2 ++
 4 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/cmd/minikube/cmd/mount.go b/cmd/minikube/cmd/mount.go
index 3054023b8e3b..146d52c3010d 100644
--- a/cmd/minikube/cmd/mount.go
+++ b/cmd/minikube/cmd/mount.go
@@ -29,14 +29,17 @@ import (
 	cmdUtil "k8s.io/minikube/cmd/util"
 	"k8s.io/minikube/pkg/minikube/cluster"
 	"k8s.io/minikube/pkg/minikube/config"
+	"k8s.io/minikube/pkg/minikube/constants"
 	"k8s.io/minikube/pkg/minikube/machine"
 	"k8s.io/minikube/third_party/go9p/ufs"
 )
 
 var mountIP string
+var mountVersion string
 var isKill bool
 var uid int
 var gid int
+var msize int
 
 // mountCmd represents the mount command
 var mountCmd = &cobra.Command{
@@ -130,7 +133,7 @@ var mountCmd = &cobra.Command{
 			ufs.StartServer(net.JoinHostPort(ip.String(), port), debugVal, hostPath)
 			wg.Done()
 		}()
-		err = cluster.MountHost(api, vmPath, ip, port, uid, gid)
+		err = cluster.MountHost(api, ip, vmPath, port, mountVersion, uid, gid, msize)
 		if err != nil {
 			fmt.Println(err.Error())
 			os.Exit(1)
@@ -141,8 +144,9 @@ var mountCmd = &cobra.Command{
 
 func init() {
 	mountCmd.Flags().StringVar(&mountIP, "ip", "", "Specify the ip that the mount should be setup on")
+	mountCmd.Flags().StringVar(&mountVersion, "9p-version", constants.DefaultMountVersion, "Specify the 9p version that the mount should use")
 	mountCmd.Flags().BoolVar(&isKill, "kill", false, "Kill the mount process spawned by minikube start")
 	mountCmd.Flags().IntVar(&uid, "uid", 1001, "Default user id used for the mount")
 	mountCmd.Flags().IntVar(&gid, "gid", 1001, "Default group id used for the mount")
-	RootCmd.AddCommand(mountCmd)
+	mountCmd.Flags().IntVar(&msize, "msize", constants.DefaultMsize, "The number of bytes to use for 9p packet payload"
 }
diff --git a/pkg/minikube/cluster/cluster.go b/pkg/minikube/cluster/cluster.go
index 1bc5dd4efe3f..85bab4096faf 100644
--- a/pkg/minikube/cluster/cluster.go
+++ b/pkg/minikube/cluster/cluster.go
@@ -449,7 +449,7 @@ func GetHostLogs(api libmachine.API, follow bool) (string, error) {
 }
 
 // MountHost runs the mount command from the 9p client on the VM to the 9p server on the host
-func MountHost(api libmachine.API, path string, ip net.IP, port string, uid, gid int) error {
+func MountHost(api libmachine.API, ip net.IP, path, mountVersion, port string, uid, gid, msize int) error {
 	host, err := CheckIfApiExistsAndLoad(api)
 	if err != nil {
 		return errors.Wrap(err, "Error checking that api exists and loading it")
@@ -461,7 +461,7 @@ func MountHost(api libmachine.API, path string, ip net.IP, port string, uid, gid
 		}
 	}
 	host.RunSSHCommand(GetMountCleanupCommand(path))
-	mountCmd, err := GetMountCommand(ip, path, port, uid, gid)
+	mountCmd, err := GetMountCommand(ip, path, port, mountVersion, uid, gid, msize)
 	if err != nil {
 		return errors.Wrap(err, "Error getting mount command")
 	}
diff --git a/pkg/minikube/cluster/commands.go b/pkg/minikube/cluster/commands.go
index 838f9ed1305c..3eb6b4cf534b 100644
--- a/pkg/minikube/cluster/commands.go
+++ b/pkg/minikube/cluster/commands.go
@@ -233,24 +233,28 @@ func GetMountCleanupCommand(path string) string {
 
 var mountTemplate = `
 sudo mkdir -p {{.Path}} || true;
-sudo mount -t 9p -o trans=tcp -o port={{.Port}} -o dfltuid={{.UID}} -o dfltgid={{.GID}} {{.IP}} {{.Path}};
+sudo mount -t 9p -o trans=tcp,port={{.Port}},dfltuid={{.UID}},dfltgid={{.GID}},version={{.Version}},msize={{.Msize}} {{.IP}} {{.Path}};
 sudo chmod 775 {{.Path}};`
 
-func GetMountCommand(ip net.IP, path, port string, uid, gid int) (string, error) {
+func GetMountCommand(ip net.IP, path, port, mountVersion string, uid, gid, msize int) (string, error) {
 	t := template.Must(template.New("mountCommand").Parse(mountTemplate))
 	buf := bytes.Buffer{}
 	data := struct {
-		IP   string
-		Path string
-		Port string
-		UID  int
-		GID  int
+		IP      string
+		Path    string
+		Port    string
+		Version string
+		UID     int
+		GID     int
+		Msize   int
 	}{
-		IP:   ip.String(),
-		Path: path,
-		Port: port,
-		UID:  uid,
-		GID:  gid,
+		IP:      ip.String(),
+		Path:    path,
+		Port:    port,
+		Version: mountVersion,
+		UID:     uid,
+		GID:     gid,
+		Msize:   msize,
 	}
 	if err := t.Execute(&buf, data); err != nil {
 		return "", err
diff --git a/pkg/minikube/constants/constants.go b/pkg/minikube/constants/constants.go
index d1d9b0399c13..9c414df299f0 100644
--- a/pkg/minikube/constants/constants.go
+++ b/pkg/minikube/constants/constants.go
@@ -133,6 +133,8 @@ const (
 	DefaultUfsPort       = "5640"
 	DefaultUfsDebugLvl   = 0
 	DefaultMountEndpoint = "/minikube-host"
+	DefaultMsize         = 262144
+	DefaultMountVersion  = "9p2000.u"
 )
 
 const IsMinikubeChildProcess = "IS_MINIKUBE_CHILD_PROCESS"