Re: [PATCH 2/2] fstest: btrfs/197: test for alien devices

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On 10/18/19 5:13 PM, Eryu Guan wrote:
On Mon, Oct 07, 2019 at 05:41:01PM +0800, Anand Jain wrote:
Test if btrfs.ko sucessfully identifies and reports the missing device,
if the missed device contians no btrfs magic string.

Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
---
  tests/btrfs/197     | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++
  tests/btrfs/197.out | 25 +++++++++++++++++
  tests/btrfs/group   |  1 +
  3 files changed, 105 insertions(+)
  create mode 100755 tests/btrfs/197
  create mode 100644 tests/btrfs/197.out

diff --git a/tests/btrfs/197 b/tests/btrfs/197
new file mode 100755
index 000000000000..82e1a299ca43
--- /dev/null
+++ b/tests/btrfs/197
@@ -0,0 +1,79 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2019 Oracle.  All Rights Reserved.
+#
+# FS QA Test 197
+#
+# Test stale and alien device in the fs devices list.
+# Similar to the testcase btrfs/196 except that here the alien device no more
+# contains the btrfs superblock.
+#
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/filter.btrfs
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+
+# Modify as appropriate.
+_supported_fs generic
+_supported_os Linux
+_require_command "$WIPEFS_PROG" wipefs
+_require_scratch
+_require_scratch_dev_pool 4
+
+workout()
+{
+	raid=$1
+	device_nr=$2
+
+	echo $raid
+	_scratch_dev_pool_get $device_nr
+
+	_scratch_pool_mkfs "-d$raid -m$raid" >> $seqres.full 2>&1 || \
+							_fail "mkfs failed"
+
+	# Make device_1 an alien btrfs device for the raid created above by
+	# adding it to the $TEST_DIR

Stale comments above.

 updated in v2.

Otherwise looks fine to me.

+
+	# don't test with the first device as auto fs check (_check_scratch_fs)
+	# picks the first device
+	device_1=$(echo $SCRATCH_DEV_POOL | awk '{print $2}')
+	$WIPEFS_PROG -a $device_1 >> $seqres.full 2>&1

If creating a new btrfs works for btrfs/196, I wonder if we could merge
the two tests into one test, firstly create a new fs & degraded mount,
then wipefs & degraded mount.

 Its better if they are separate. The workout is already looping for
 different raids. Per experiences from btrfs/011 it gets harder to
 debug with testing different cases in one test case. Can I keep them
 separate?

 V2 is being sent out in a while.

Thanks, Anand

Thanks,
Eryu

+
+	device_2=$(echo $SCRATCH_DEV_POOL | awk '{print $1}')
+	_mount -o degraded $device_2 $SCRATCH_MNT
+	# Check if missing device is reported as in the 196.out
+	$BTRFS_UTIL_PROG filesystem show -m $SCRATCH_MNT | \
+						_filter_btrfs_filesystem_show
+
+	_scratch_unmount
+	_scratch_dev_pool_put
+}
+
+workout "raid1" "2"
+workout "raid5" "3"
+workout "raid6" "4"
+workout "raid10" "4"
+
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/197.out b/tests/btrfs/197.out
new file mode 100644
index 000000000000..79237b854b5a
--- /dev/null
+++ b/tests/btrfs/197.out
@@ -0,0 +1,25 @@
+QA output created by 197
+raid1
+Label: none  uuid: <UUID>
+	Total devices <NUM> FS bytes used <SIZE>
+	devid <DEVID> size <SIZE> used <SIZE> path SCRATCH_DEV
+	*** Some devices missing
+
+raid5
+Label: none  uuid: <UUID>
+	Total devices <NUM> FS bytes used <SIZE>
+	devid <DEVID> size <SIZE> used <SIZE> path SCRATCH_DEV
+	*** Some devices missing
+
+raid6
+Label: none  uuid: <UUID>
+	Total devices <NUM> FS bytes used <SIZE>
+	devid <DEVID> size <SIZE> used <SIZE> path SCRATCH_DEV
+	*** Some devices missing
+
+raid10
+Label: none  uuid: <UUID>
+	Total devices <NUM> FS bytes used <SIZE>
+	devid <DEVID> size <SIZE> used <SIZE> path SCRATCH_DEV
+	*** Some devices missing
+
diff --git a/tests/btrfs/group b/tests/btrfs/group
index c86ea2516397..f2eac5c20712 100644
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -199,3 +199,4 @@
  194 auto volume
  195 auto volume
  196 auto quick volume
+197 auto quick volume
--
1.8.3.1




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