generic: add a test for umount racing mount
authorBoris Burkov <boris@bur.io>
Mon, 20 Jul 2020 19:05:56 +0000 (12:05 -0700)
committerEryu Guan <guaneryu@gmail.com>
Sun, 26 Jul 2020 13:51:08 +0000 (21:51 +0800)
Test if dirtying many inodes (which can delay umount) then
unmounting and quickly mounting again causes the mount to fail.

A race, which breaks the test in btrfs, is fixed by kernel commit
48cfa61b58a1 ("btrfs: fix mount failure caused by race with umount")

Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
tests/generic/604 [new file with mode: 0755]
tests/generic/604.out [new file with mode: 0644]
tests/generic/group

diff --git a/tests/generic/604 b/tests/generic/604
new file mode 100755 (executable)
index 0000000..17e74f5
--- /dev/null
@@ -0,0 +1,52 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2020 Facebook  All Rights Reserved.
+#
+# FS QA Test 604
+#
+# Evicting dirty inodes can take a long time during umount.
+# Check that a new mount racing with such a delayed umount succeeds.
+#
+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
+
+# 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_scratch
+
+_scratch_mkfs > /dev/null 2>&1
+_scratch_mount
+for i in $(seq 0 500); do
+       $XFS_IO_PROG -c "pwrite 0 4K" $SCRATCH_MNT/$i >/dev/null 2>&1
+done
+_scratch_unmount &
+_scratch_mount
+wait
+
+echo "Silence is golden"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/604.out b/tests/generic/604.out
new file mode 100644 (file)
index 0000000..c06a1c7
--- /dev/null
@@ -0,0 +1,2 @@
+QA output created by 604
+Silence is golden
index 1d98ed5f29f6f4d02ff4d833592ee080375b6408..8d87c5e3c466dcfef93d5359ffea9d4fe7e9c5a0 100644 (file)
 601 auto quick quota
 602 auto quick encrypt
 603 auto quick quota
+604 auto quick mount