From 0232fc320a6fb18b57911a428a2e1b51f03e2973 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.com>
Date: Tue, 2 Jul 2019 15:17:47 +0200
Subject: [PATCH] btrfs-progs: test: add simple test for 'fi du' recursion
 depth

The documentation lacks clarity about depth to which recursive
'fi du' goes, and was pointed out by a user.

Add test that creates another mount inside a filesystem and verifies
that 'fi du' does not go there.

Issue: #185
Signed-off-by: David Sterba <dsterba@suse.com>
---
 tests/cli-tests/012-defrag-recursion/test.sh | 46 ++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100755 tests/cli-tests/012-defrag-recursion/test.sh

diff --git a/tests/cli-tests/012-defrag-recursion/test.sh b/tests/cli-tests/012-defrag-recursion/test.sh
new file mode 100755
index 00000000..d7f6b80c
--- /dev/null
+++ b/tests/cli-tests/012-defrag-recursion/test.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+# check how deep does recursive 'fi du' go, currently it has to stop at
+# mountpoint and can continue to subvolumes
+
+source "$TEST_TOP/common"
+
+check_prereq mkfs.btrfs
+check_prereq btrfs
+
+setup_root_helper
+prepare_test_dev
+
+run_check_mkfs_test_dev
+run_check_mount_test_dev
+
+run_check truncate -s 0 img2
+run_check truncate -s 1G img2
+chmod a+w img2
+
+# create second mount with btrfs, create a file in the target mount path, the
+# mount must hide that
+run_check $SUDO_HELPER mkdir -p "$TEST_MNT"/mnt2
+run_check $SUDO_HELPER dd if=/dev/zero bs=1M count=10 of="$TEST_MNT"/mnt2/hiddenfile
+
+run_check $SUDO_HELPER "$TOP"/mkfs.btrfs -f img2
+run_check $SUDO_HELPER mount -o loop img2 "$TEST_MNT"/mnt2
+run_check $SUDO_HELPER dd if=/dev/zero bs=1M count=10 of="$TEST_MNT"/mnt2/file21
+run_check $SUDO_HELPER dd if=/dev/zero bs=1M count=10 of="$TEST_MNT"/mnt2/file22
+
+run_check $SUDO_HELPER dd if=/dev/zero bs=1M count=10 of="$TEST_MNT"/file1
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT"/subv1
+run_check $SUDO_HELPER dd if=/dev/zero bs=1M count=10 of="$TEST_MNT"/subv1/file2
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume snapshot "$TEST_MNT"/subv1 "$TEST_MNT"/snap1
+run_check $SUDO_HELPER dd if=/dev/zero bs=1M count=10 of="$TEST_MNT"/snap1/file3
+
+run_check $SUDO_HELPER find "$TEST_MNT"
+run_check_stdout $SUDO_HELPER "$TOP/btrfs" filesystem du "$TEST_MNT" |
+	grep -q 'mnt2' && _fail "recursive du went to another filesystem"
+
+run_check_stdout $SUDO_HELPER "$TOP/btrfs" filesystem du "$TEST_MNT"/mnt2 |
+	grep -q 'hiddenfile' && _fail "du sees beneath mount point"
+
+run_check $SUDO_HELPER umount "$TEST_MNT"/mnt2
+run_check_umount_test_dev
+
+rm -- img2