CWA customer change #3.2: Fix lvm disk dimension Part 2: add source f…

…ield in PartitionStat of Linux disk

patches/gopsutil/v3/disk/disk.go

@@ -3,7 +3,6 @@ package disk
 import (
 	"context"
 	"encoding/json"
-	"modernc.org/cc/v3"
 
 	"github.com/shirou/gopsutil/v3/internal/common"
 )
@@ -25,6 +24,7 @@ type UsageStat struct {
 
 type PartitionStat struct {
 	Device     string   `json:"device"`
+	Source	   string   `json:"source,omitempty"`
 	Mountpoint string   `json:"mountpoint"`
 	Fstype     string   `json:"fstype"`
 	Opts       []string `json:"opts"`

patches/gopsutil/v3/disk/disk_linux.go

@@ -330,6 +330,7 @@ func PartitionsWithContext(ctx context.Context, all bool) ([]PartitionStat, erro
 			if strings.HasPrefix(d.Device, "/dev/mapper/") {
 				devpath, err := filepath.EvalSymlinks(common.HostDev(strings.Replace(d.Device, "/dev", "", -1)))
 				if err == nil {
+					d.Source = d.Device
 					d.Device = devpath
 				}
 			}

patches/gopsutil/v3/disk/disk_test.go

@@ -114,6 +114,17 @@ func TestDiskPartitionStat_String(t *testing.T) {
 	if e != fmt.Sprintf("%v", v) {
 		t.Errorf("DiskUsageStat string is invalid: %v", v)
 	}
+	v = PartitionStat{
+		Device:     "dm-1",
+		Source:     "vg0--lv0",
+		Mountpoint: "/",
+		Fstype:     "ext4",
+		Opts:       []string{"ro"},
+	}
+	e = `{"device":"dm-1","source":"vg0--lv0","mountpoint":"/","fstype":"ext4","opts":"ro"}`
+	if e != fmt.Sprintf("%v", v) {
+		t.Errorf("DiskUsageStat string is invalid: %v", v)
+	}
 }
 
 func TestDiskIOCountersStat_String(t *testing.T) {