lib/fs: Use gopsutils for disk usage (#5905)

go.mod

@@ -5,7 +5,6 @@ require (
 	github.com/AudriusButkevicius/pfilter v0.0.0-20190627213056-c55ef6137fc6
 	github.com/AudriusButkevicius/recli v0.0.5
 	github.com/bkaradzic/go-lz4 v0.0.0-20160924222819-7224d8d8f27e
-	github.com/calmh/du v1.0.1
 	github.com/calmh/xdr v1.1.0
 	github.com/ccding/go-stun v0.0.0-20180726100737-be486d185f3d
 	github.com/certifi/gocertifi v0.0.0-20190506164543-d2eda7129713 // indirect

go.sum

@@ -13,8 +13,6 @@ github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/bkaradzic/go-lz4 v0.0.0-20160924222819-7224d8d8f27e h1:2augTYh6E+XoNrrivZJBadpThP/dsvYKj0nzqfQ8tM4=
 github.com/bkaradzic/go-lz4 v0.0.0-20160924222819-7224d8d8f27e/go.mod h1:0YdlkowM3VswSROI7qDxhRvJ3sLhlFrRRwjwegp5jy4=
-github.com/calmh/du v1.0.1 h1:uDCrDbXVVPrzxSNRkpj6nqSfwrl5uRWH3zvrJgl7RRo=
-github.com/calmh/du v1.0.1/go.mod h1:pHNccp4cXQeyDaiV3S7t5GN+eGOgynF0VSLxJjk9tLU=
 github.com/calmh/xdr v1.1.0 h1:U/Dd4CXNLoo8EiQ4ulJUXkgO1/EyQLgDKLgpY1SOoJE=
 github.com/calmh/xdr v1.1.0/go.mod h1:E8sz2ByAdXC8MbANf1LCRYzedSnnc+/sXXJs/PVqoeg=
 github.com/ccding/go-stun v0.0.0-20180726100737-be486d185f3d h1:As4937T5NVbJ/DmZT9z33pyLEprMd6CUSfhbmMY57Io=

lib/fs/basicfs.go

@@ -15,7 +15,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/calmh/du"
+	"github.com/shirou/gopsutil/disk"
 )
 
 var (
@@ -266,11 +266,14 @@ func (f *BasicFilesystem) Usage(name string) (Usage, error) {
 	if err != nil {
 		return Usage{}, err
 	}
-	u, err := du.Get(name)
+	u, err := disk.Usage(name)
+	if err != nil {
+		return Usage{}, err
+	}
 	return Usage{
-		Free:  u.FreeBytes,
-		Total: u.TotalBytes,
-	}, err
+		Free:  int64(u.Free),
+		Total: int64(u.Total),
+	}, nil
 }
 
 func (f *BasicFilesystem) Type() FilesystemType {