btrfs-progs: misc tests: add 009-subvolume-sync-must-wait

Test to verify that subovolume sync waits until the subvolume is
cleaned.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/tests/misc-tests/009-subvolume-sync-must-wait/test.sh b/tests/misc-tests/009-subvolume-sync-must-wait/test.sh
new file mode 100755 (executable)
index 0000000..66d38ea
--- /dev/null
+++ b/tests/misc-tests/009-subvolume-sync-must-wait/test.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+#
+# Verify that subovolume sync waits until the subvolume is cleaned
+
+source $TOP/tests/common
+
+check_prereq mkfs.btrfs
+setup_root_helper
+
+run_check truncate -s 2G $IMAGE
+run_check $TOP/mkfs.btrfs -f $IMAGE
+run_check $SUDO_HELPER mount $IMAGE $TEST_MNT
+run_check $SUDO_HELPER chmod a+rw $TEST_MNT
+
+cd $TEST_MNT
+
+for i in `seq 5`; do
+       run_check dd if=/dev/zero of=file$i bs=1M count=10
+done
+
+for sn in `seq 4`;do
+       run_check $SUDO_HELPER $TOP/btrfs subvolume snapshot . snap$sn
+       for i in `seq 10`; do
+               run_check dd if=/dev/zero of=snap$sn/file$i bs=1M count=10
+       done
+done
+
+run_check $SUDO_HELPER $TOP/btrfs subvolume list .
+run_check $SUDO_HELPER $TOP/btrfs subvolume list -d .
+
+idtodel=`run_check_stdout $SUDO_HELPER $TOP/btrfs inspect-internal rootid snap3`
+
+# delete, sync after some time
+run_check $SUDO_HELPER $TOP/btrfs subvolume delete -c snap3
+{ sleep 5; run_check $TOP/btrfs filesystem sync $TEST_MNT; } &
+
+run_check $SUDO_HELPER $TOP/btrfs subvolume sync . $idtodel
+
+if run_check_stdout $SUDO_HELPER $TOP/btrfs subvolume list -d . |
+               grep -q "ID $idtodel.*DELETED"; then
+       _fail "sync did not wait for the subvolume cleanup"
+fi
+
+run_check $TOP/btrfs filesystem sync $TEST_MNT
+run_check $SUDO_HELPER $TOP/btrfs subvolume list -d .
+
+wait
+cd ..
+
+run_check $SUDO_HELPER umount $TEST_MNT