fstests: Verify dir permissions when creating a stub subvolume

btrfs supports creating nesting subvolumes however snapshots are not
recurive. When a snapshot is taken of a volume which contains a subvolume
the subvolume is replaced with a stub subvolume which has the same name and
uses inode number 2. This test validates that the stub volume copies
permissions of the original volume.

Signed-off-by: Lee Trager <lee@trager.us>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/common/rc b/common/rc
index 66d270ac..7005f4bf 100644
--- a/common/rc
+++ b/common/rc
@@ -5224,6 +5224,11 @@ _soak_loop_running() {
 	return 0
 }
 
+_require_unshare() {
+	unshare -f -r -m -p -U $@ true &>/dev/null || \
+		_notrun "unshare: command not found, should be in util-linux"
+}
+
 init_rc
 
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