This tests ensures that renames/exchanges across subvolumes work only
for other subvolumes and are otherwise forbidden and fail.
Signed-off-by: Nikolay Borisov <nborisov@xxxxxxxx>
---
Changes in V2:
* Added cross-subvol rename tests
* Added cross-subvol subvolume rename test
* Added ordinary volume rename test
* Removed explicit sync
tests/btrfs/246 | 43 +++++++++++++++++++++++++++++++++++++++++++
tests/btrfs/246.out | 27 +++++++++++++++++++++++++++
2 files changed, 70 insertions(+)
create mode 100755 tests/btrfs/246
create mode 100644 tests/btrfs/246.out
diff --git a/tests/btrfs/246 b/tests/btrfs/246
new file mode 100755
index 000000000000..eeb12bb457a8
--- /dev/null
+++ b/tests/btrfs/246
@@ -0,0 +1,43 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2021 SUSE Linux Products GmbH. All Rights Reserved.
+#
+# FS QA Test 246
+#
+# Tests rename exchange behavior when subvolumes are involved. This is also a
+# regression test for 3f79f6f6247c ("btrfs: prevent rename2 from exchanging a
+# subvol with a directory from different parents").
+#
+. ./common/preamble
+_begin_fstest auto quick rename subvol
+
+# Import common functions.
+ . ./common/renameat2
+
+# real QA test starts here
+
+# Modify as appropriate.
+_supported_fs btrfs
+_require_renameat2 exchange
+_require_scratch
+
+_scratch_mkfs >> $seqres.full 2>&1
+_scratch_mount
+
+# Create 2 subvols to use as parents for the rename ops
+$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol1 1>/dev/null
+$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol2 1>/dev/null
+
+# Ensure cross subvol ops are forbidden
+_rename_tests_source_dest $SCRATCH_MNT/subvol1/src $SCRATCH_MNT/subvol2/dst "cross-subvol" "-x"
+
+# Prepare a subvolume and a directory whose parents are different subvolumes
+$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol1/sub-subvol 1>/dev/null
+mkdir $SCRATCH_MNT/subvol2/dir
+
+# Ensure exchanging a subvol with a dir when both parents are different fails
+$here/src/renameat2 -x $SCRATCH_MNT/subvol1/sub-subvol $SCRATCH_MNT/subvol2/dir
+
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/246.out b/tests/btrfs/246.out
new file mode 100644
index 000000000000..d50dc28b1b40
--- /dev/null
+++ b/tests/btrfs/246.out
@@ -0,0 +1,27 @@
+QA output created by 246
+cross-subvol none/none -> No such file or directory
+cross-subvol none/regu -> No such file or directory
+cross-subvol none/symb -> No such file or directory
+cross-subvol none/dire -> No such file or directory
+cross-subvol none/tree -> No such file or directory
+cross-subvol regu/none -> No such file or directory
+cross-subvol regu/regu -> Invalid cross-device link
+cross-subvol regu/symb -> Invalid cross-device link
+cross-subvol regu/dire -> Invalid cross-device link
+cross-subvol regu/tree -> Invalid cross-device link
+cross-subvol symb/none -> No such file or directory
+cross-subvol symb/regu -> Invalid cross-device link
+cross-subvol symb/symb -> Invalid cross-device link
+cross-subvol symb/dire -> Invalid cross-device link
+cross-subvol symb/tree -> Invalid cross-device link
+cross-subvol dire/none -> No such file or directory
+cross-subvol dire/regu -> Invalid cross-device link
+cross-subvol dire/symb -> Invalid cross-device link
+cross-subvol dire/dire -> Invalid cross-device link
+cross-subvol dire/tree -> Invalid cross-device link
+cross-subvol tree/none -> No such file or directory
+cross-subvol tree/regu -> Invalid cross-device link
+cross-subvol tree/symb -> Invalid cross-device link
+cross-subvol tree/dire -> Invalid cross-device link
+cross-subvol tree/tree -> Invalid cross-device link
+Invalid cross-device link
--
2.17.1
