Update to new cadvisor v0.48.1

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

vendor/github.com/google/cadvisor/fs/fs.go

@@ -21,7 +21,6 @@ package fs
 import (
 	"bufio"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path"
@@ -146,7 +145,7 @@ func getFsUUIDToDeviceNameMap() (map[string]string, error) {
 		return make(map[string]string), nil
 	}
 
-	files, err := ioutil.ReadDir(dir)
+	files, err := os.ReadDir(dir)
 	if err != nil {
 		return nil, err
 	}
@@ -387,6 +386,7 @@ func (i *RealFsInfo) GetFsInfoForPath(mountSet map[string]struct{}) ([]Fs, error
 	if err != nil {
 		return nil, err
 	}
+	nfsInfo := make(map[string]Fs, 0)
 	for device, partition := range i.partitions {
 		_, hasMount := mountSet[partition.mountpoint]
 		_, hasDevice := deviceSet[device]
@@ -395,7 +395,11 @@ func (i *RealFsInfo) GetFsInfoForPath(mountSet map[string]struct{}) ([]Fs, error
 				err error
 				fs  Fs
 			)
-			switch partition.fsType {
+			fsType := partition.fsType
+			if strings.HasPrefix(partition.fsType, "nfs") {
+				fsType = "nfs"
+			}
+			switch fsType {
 			case DeviceMapper.String():
 				fs.Capacity, fs.Free, fs.Available, err = getDMStats(device, partition.blockSize)
 				klog.V(5).Infof("got devicemapper fs capacity stats: capacity: %v free: %v available: %v:", fs.Capacity, fs.Free, fs.Available)
@@ -408,6 +412,22 @@ func (i *RealFsInfo) GetFsInfoForPath(mountSet map[string]struct{}) ([]Fs, error
 				}
 				// if /dev/zfs is not present default to VFS
 				fallthrough
+			case NFS.String():
+				devId := fmt.Sprintf("%d:%d", partition.major, partition.minor)
+				if v, ok := nfsInfo[devId]; ok {
+					fs = v
+					break
+				}
+				var inodes, inodesFree uint64
+				fs.Capacity, fs.Free, fs.Available, inodes, inodesFree, err = getVfsStats(partition.mountpoint)
+				if err != nil {
+					klog.V(4).Infof("the file system type is %s, partition mountpoint does not exist: %v, error: %v", partition.fsType, partition.mountpoint, err)
+					break
+				}
+				fs.Inodes = &inodes
+				fs.InodesFree = &inodesFree
+				fs.Type = VFS
+				nfsInfo[devId] = fs
 			default:
 				var inodes, inodesFree uint64
 				if utils.FileExists(partition.mountpoint) {
@@ -616,7 +636,7 @@ func GetDirUsage(dir string) (UsageInfo, error) {
 
 	rootStat, ok := rootInfo.Sys().(*syscall.Stat_t)
 	if !ok {
-		return usage, fmt.Errorf("unsuported fileinfo for getting inode usage of %q", dir)
+		return usage, fmt.Errorf("unsupported fileinfo for getting inode usage of %q", dir)
 	}
 
 	rootDevID := rootStat.Dev