tests: fix mount move test to work with shared mount

If parent mount for test directory is mounted with shared flag,
move mount test fails because kernel rejects mount move operation.

Use another directory level and explicitly make parent mount private.

(All "modern" systems using system have mounts shared for some reason.)

Signed-off-by: Milan Broz <mbroz@redhat.com>

diff --git a/tests/ts/mount/move b/tests/ts/mount/move
index 3862f462c81293922dc1abd13389b27d89a3158b..ea376856a5eaef58b5b62a426b252dc3a1d7707c 100755 (executable)
--- a/tests/ts/mount/move
+++ b/tests/ts/mount/move
@@ -22,9 +22,19 @@ TS_DESC="move"
 ts_init "$*"
 ts_skip_nonroot
 
-DIR_SRC="$TS_OUTDIR/mnt-move-src"
-DIR_A="$TS_OUTDIR/mnt-move-A"
-DIR_B="$TS_OUTDIR/mnt-move-B"
+DIR_PRIVATE2="$TS_OUTDIR/mnt-move-private2"
+DIR_PRIVATE="$TS_OUTDIR/mnt-move-private"
+
+DIR_SRC="$DIR_PRIVATE/mnt-move-src"
+DIR_A="$DIR_PRIVATE/mnt-move-A"
+DIR_B="$DIR_PRIVATE/mnt-move-B"
+
+# create bind mount and make it private to be sure
+# (kernel cannot move mount with shared parent)
+[ -d $DIR_PRIVATE2 ] || mkdir $DIR_PRIVATE2
+[ -d $DIR_PRIVATE ] || mkdir $DIR_PRIVATE
+$TS_CMD_MOUNT --bind $DIR_PRIVATE2 $DIR_PRIVATE
+$TS_CMD_MOUNT --make-private $DIR_PRIVATE
 
 [ -d $DIR_SRC ] || mkdir $DIR_SRC
 [ -d $DIR_A ] || mkdir $DIR_A
@@ -48,6 +58,9 @@ $TS_CMD_FINDMNT --kernel --target "$DIR_B" &> /dev/null
 $TS_CMD_UMOUNT $DIR_B
 rmdir $DIR_SRC $DIR_A $DIR_B
 
+$TS_CMD_UMOUNT $DIR_PRIVATE
+rmdir $DIR_PRIVATE $DIR_PRIVATE2
+
 ts_log "Success"
 ts_finalize