[PATCH v2 05/10] btrfs: check if cloned device mounts with tempfsid

Anand Jain
2024-02-19T19:49:41Z

If another device with the same fsid and uuid would mount then verify if
it mounts with a temporary fsid.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
v2:
Bring create_cloned_devices() into the testcase.
Just use _cp_reflink output to match with golden output.

tests/btrfs/312 | 85 +++++++++++++++++++++++++++++++++++++++++++++
tests/btrfs/312.out | 19 ++++++++++
2 files changed, 104 insertions(+)
create mode 100755 tests/btrfs/312
create mode 100644 tests/btrfs/312.out

diff --git a/tests/btrfs/312 b/tests/btrfs/312
new file mode 100755
index 000000000000..6dd5811ddaa5
--- /dev/null
+++ b/tests/btrfs/312
@@ -0,0 +1,85 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2024 Oracle. All Rights Reserved.
+#
+# FS QA Test 312
+#
+# On a clone a device check to see if tempfsid is activated.
+#
+. ./common/preamble
+_begin_fstest auto quick tempfsid
+
+_cleanup()
+{
+ cd /
+ umount $mnt1 > /dev/null 2>&1
+ rm -r -f $tmp.*
+ rm -r -f $mnt1
+}
+
+. ./common/filter.btrfs
+. ./common/reflink
+
+_supported_fs btrfs
+_require_btrfs_sysfs_fsid
+_require_btrfs_fs_feature temp_fsid
+_require_btrfs_command inspect-internal dump-super
+_require_scratch_dev_pool 2
+_scratch_dev_pool_get 2
+
+mnt1=$TEST_DIR/$seq/mnt1
+mkdir -p $mnt1
+
+create_cloned_devices()
+{
+ local dev1=$1
+ local dev2=$2
+
+ [[ -z $dev1 || -z $dev2 ]] && \
+ _fail "create_cloned_devices() requires two devices as arguments"
+
+ echo -n Creating cloned device...
+ _mkfs_dev -fq -b $((1024 * 1024 * 300)) $dev1
+
+ _mount $dev1 $SCRATCH_MNT
+
+ $XFS_IO_PROG -fc 'pwrite -S 0x61 0 9000' $SCRATCH_MNT/foo | \
+ _filter_xfs_io
+ $UMOUNT_PROG $SCRATCH_MNT
+ # device dump of $dev1 to $dev2
+ dd if=$dev1 of=$dev2 bs=300M count=1 conv=fsync status=none || \
+ _fail "dd failed: $?"
+ echo done
+}
+
+mount_cloned_device()
+{
+ local ret
+
+ echo ---- $FUNCNAME ----
+ create_cloned_devices ${SCRATCH_DEV_NAME[0]} ${SCRATCH_DEV_NAME[1]}
+
+ echo Mounting original device
+ _mount ${SCRATCH_DEV_NAME[0]} $SCRATCH_MNT
+ $XFS_IO_PROG -fc 'pwrite -S 0x61 0 9000' $SCRATCH_MNT/foo | \
+ _filter_xfs_io
+ check_fsid ${SCRATCH_DEV_NAME[0]}
+
+ echo Mounting cloned device
+ _mount ${SCRATCH_DEV_NAME[1]} $mnt1 || \
+ _fail "mount failed, tempfsid didn't work"
+
+ echo cp reflink must fail
+ _cp_reflink $SCRATCH_MNT/foo $mnt1/bar 2>&1 | \
+ _filter_testdir_and_scratch
+
+ check_fsid ${SCRATCH_DEV_NAME[1]}
+}
+
+mount_cloned_device
+
+_scratch_dev_pool_put
+
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/312.out b/tests/btrfs/312.out
new file mode 100644
index 000000000000..b7de6ce3cc6e
--- /dev/null
+++ b/tests/btrfs/312.out
@@ -0,0 +1,19 @@
+QA output created by 312
+---- mount_cloned_device ----
+Creating cloned device...wrote 9000/9000 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+done
+Mounting original device
+wrote 9000/9000 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+On disk fsid: FSID
+Metadata uuid: FSID
+Temp fsid: FSID
+Tempfsid status: 0
+Mounting cloned device
+cp reflink must fail
+cp: failed to clone 'TEST_DIR/312/mnt1/bar' from 'SCRATCH_MNT/foo': Invalid cross-device link
+On disk fsid: FSID
+Metadata uuid: FSID
+Temp fsid: TEMPFSID
+Tempfsid status: 1
--
2.39.3