overlay: create workdir if it doesn't exist

Otherwise a container created before we needed workdir will fail to start after a kernel+lxc update. Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com> Acked-by: KATOH Yasufumi <karma@jazz.email.ne.jp>

overlay: create workdir if it doesn't exist
72453c4c · Serge Hallyn · Stéphane Graber · 485227ee · 72453c4c
Commit 72453c4c authored May 01, 2015 by Serge Hallyn Committed by Stéphane Graber Jul 01, 2015
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bdev.c src/lxc/bdev.c +5 -0

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--- a/src/lxc/bdev.c
+++ b/src/lxc/bdev.c
@@ -2210,6 +2210,11 @@ static int overlayfs_mount(struct bdev *bdev)
 		return -22;
 	}

+	if (mkdir_p(work, 0755) < 0 && errno != EEXIST) {
+		free(mntdata);
+		return -22;
+	}
+
 	// TODO We should check whether bdev->src is a blockdev, and if so
 	// but for now, only support overlays of a basic directory