Healing process should not heal root disk (#7089)

pkg/disk/root-disk-unix.go

@@ -0,0 +1,31 @@
+// +build !windows
+
+package disk
+
+import (
+	"os"
+	"syscall"
+)
+
+// IsRootDisk returns if diskPath belongs to root-disk, i.e the disk mounted at "/"
+func IsRootDisk(diskPath string) (bool, error) {
+	rootDisk := false
+	diskInfo, err := os.Stat(diskPath)
+	if err != nil {
+		return false, err
+	}
+	rootInfo, err := os.Stat("/")
+	if err != nil {
+		return false, err
+	}
+	diskStat, diskStatOK := diskInfo.Sys().(*syscall.Stat_t)
+	rootStat, rootStatOK := rootInfo.Sys().(*syscall.Stat_t)
+	if diskStatOK && rootStatOK {
+		if diskStat.Dev == rootStat.Dev {
+			// Indicate if the disk path is on root disk. This is used to indicate the healing
+			// process not to format the drive and end up healing it.
+			rootDisk = true
+		}
+	}
+	return rootDisk, nil
+}

pkg/disk/root-disk-windows.go

@@ -0,0 +1,9 @@
+// +build windows
+
+package disk
+
+// IsRootDisk returns if diskPath belongs to root-disk, i.e the disk mounted at "/"
+func IsRootDisk(diskPath string) (bool, error) {
+	// On windows a disk can never be mounted on a subpath.
+	return false, nil
+}