generic: add a test for device removal without dirty data

Test the removal of the underlying device when the file system still
does not have dirty data.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>

diff --git a/tests/generic/731 b/tests/generic/731
new file mode 100755 (executable)
index 0000000..e1400d0
--- /dev/null
+++ b/tests/generic/731
@@ -0,0 +1,58 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2015 Red Hat Inc. All Rights Reserved.
+# Copyright (c) 2023 Christoph Hellwig
+#
+# Test proper file system shut down when the block device is removed underneath
+# and it has no dirty data.
+#
+#
+. ./common/preamble
+_begin_fstest auto quick
+
+_cleanup()
+{
+       cd /
+       $UMOUNT_PROG $SCSI_DEBUG_MNT >>$seqres.full 2>&1
+       _put_scsi_debug_dev
+       rm -f $tmp.*
+}
+
+. ./common/filter
+. ./common/scsi_debug
+
+# We don't actually use the test device, but we need a block based fs
+_require_test
+_require_block_device $TEST_DEV
+_supported_fs generic
+_require_scsi_debug
+
+SCSI_DEBUG_DEV=`_get_scsi_debug_dev 512 512 0 256`
+test -b "$SCSI_DEBUG_DEV" || _notrun "Failed to initialize scsi debug device"
+echo "SCSI debug device $SCSI_DEBUG_DEV" >>$seqres.full
+
+run_check _mkfs_dev $SCSI_DEBUG_DEV
+
+SCSI_DEBUG_MNT="$TEST_DIR/scsi_debug_$seq"
+rm -rf $SCSI_DEBUG_MNT
+mkdir $SCSI_DEBUG_MNT
+run_check _mount $SCSI_DEBUG_DEV $SCSI_DEBUG_MNT
+
+# create a test file
+$XFS_IO_PROG -f -c "pwrite 0 1M" -c "fsync" $SCSI_DEBUG_MNT/testfile >>$seqres.full
+
+# open a file descriptor for reading the file
+exec 3< $SCSI_DEBUG_MNT/testfile
+
+# drop all caches and delete the scsi debug device
+echo 3 > /proc/sys/vm/drop_caches
+echo 1 > /sys/block/`_short_dev $SCSI_DEBUG_DEV`/device/delete
+
+# try to read from the file, which should give us -EIO
+cat <&3 > /dev/null
+
+# close the file descriptor to not block unmount
+exec 3<&-
+
+status=0
+exit

diff --git a/tests/generic/731.out b/tests/generic/731.out
new file mode 100644 (file)
index 0000000..102c052
--- /dev/null
+++ b/tests/generic/731.out
@@ -0,0 +1,2 @@
+QA output created by 731
+cat: -: Input/output error