Switch all calls to filepath.Walk to filepath.WalkDir

WalkDir should be faster the Walk, since we often do
not need to stat files.

[NO NEW TESTS NEEDED] Existing tests should find errors.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

1 files changed, 2 insertions, 9 deletions

diff --git a/libpod/container_internal.go b/libpod/container_internal.go
index b7362e7fb..0db59f2fe 100644
--- a/libpod/container_internal.go
+++ b/libpod/container_internal.go
@@ -99,15 +99,8 @@ func (c *Container) rootFsSize() (int64, error) {
 // rwSize gets the size of the mutable top layer of the container.
 func (c *Container) rwSize() (int64, error) {
 	if c.config.Rootfs != "" {
-		var size int64
-		err := filepath.Walk(c.config.Rootfs, func(path string, info os.FileInfo, err error) error {
-			if err != nil {
-				return err
-			}
-			size += info.Size()
-			return nil
-		})
-		return size, err
+		size, err := util.SizeOfPath(c.config.Rootfs)
+		return int64(size), err
 	}
 
 	container, err := c.runtime.store.Container(c.ID())