[PATCH 3/4] generic: test I/O on devices with T10 protection information

[Christoph Hellwig <hch@lst.de>]

Add a test that runs fsx in buffered and direct I/O mode on T10 PI
type 1, 2, 3 with and without strip/insert using scsi_debug.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 tests/generic/2301     | 90 ++++++++++++++++++++++++++++++++++++++++++
 tests/generic/2301.out | 73 ++++++++++++++++++++++++++++++++++
 2 files changed, 163 insertions(+)
 create mode 100755 tests/generic/2301
 create mode 100644 tests/generic/2301.out

diff --git a/tests/generic/2301 b/tests/generic/2301
new file mode 100755
index 000000000000..db984051430d
--- /dev/null
+++ b/tests/generic/2301
@@ -0,0 +1,90 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2026 Christoph Hellwig
+#
+# FS QA Test No. 2301
+#
+# Basix FSX sanity check when using T10 protection information
+#
+. ./common/preamble
+_begin_fstest auto rw
+
+_cleanup()
+{
+	cd /
+	rm -r -f $tmp.*
+	[ -d "$SCSI_DEBUG_MNT" ] && _unmount $SCSI_DEBUG_MNT 2>/dev/null
+	_put_scsi_debug_dev
+}
+
+. ./common/scsi_debug
+
+_require_scsi_debug
+# If TEST_DEV is block device, make sure current fs is a localfs which can be
+# written on scsi_debug device
+_require_test
+_require_block_device $TEST_DEV
+
+size=$(_small_fs_size_mb 256)
+
+# like run_fsx(), but using a custom path
+fsx_run()
+{
+	_run_fsx_on_file $SCSI_DEBUG_MNT/junk $@ || _exit 1
+}
+
+test_dif()
+{
+	local pi_type=$1
+	local pi_enable="$2"
+
+	scsi_debug_pi_opts="write_same_length=0 dif=${pi_type} dix=1"
+	SCSI_DEBUG_DEV=`_get_scsi_debug_dev 512 512 0 $size $scsi_debug_pi_opts`
+
+	SCSI_DEBUG_MNT="$TEST_DIR/scsi_debug_$seq"
+	rm -rf $SCSI_DEBUG_MNT
+	mkdir $SCSI_DEBUG_MNT
+
+	_mkfs_dev $SCSI_DEBUG_DEV || \
+		_fail "Can't make $FSTYP on DIF-enabled scsi_debug device"
+	run_check _mount $SCSI_DEBUG_DEV $SCSI_DEBUG_MNT
+	bsize=$($here/src/min_dio_alignment $SCSI_DEBUG_MNT $SCSI_DEBUG_DEV)
+
+	local integrity_path="$(_sysfs_block_integrity_path $SCSI_DEBUG_DEV)"
+	echo $pi_enable > $integrity_path/read_verify
+	echo $pi_enable > $integrity_path/write_generate
+
+	# fsx load similar to generic/091
+	echo "Testing direct I/O for DIF type $pi_type (enabled: $pi_enable)"
+	local dio_opts="-r PSIZE -t BSIZE -w BSIZE"
+	fsx_run -N 10000            -l 500000 -r BSIZE -w BSIZE -Z -R -W
+	fsx_run -N 10000  -o 8192   -l 500000 -r BSIZE -w BSIZE -Z -R -W
+	fsx_run -N 10000  -o 32768  -l 500000 -r BSIZE -w BSIZE -Z -R -W
+	fsx_run -N 10000  -o 8192   -l 500000 -r BSIZE -w BSIZE -Z -R -W
+	fsx_run -N 10000  -o 32768  -l 500000 -r BSIZE -w BSIZE -Z -R -W
+	fsx_run -N 10000  -o 128000 -l 500000 -r BSIZE -w BSIZE -Z -W
+
+	# fsx load similar to generic/091 but using buffered I/O
+	echo "Testing buffered I/O for DIF type $pi_type (enabled: $pi_enable)"
+	fsx_run -N 10000            -l 500000
+	fsx_run -N 10000  -o 8192   -l 500000
+	fsx_run -N 10000  -o 32768  -l 500000
+	fsx_run -N 10000  -o 128000 -l 500000
+
+	[ -d "$SCSI_DEBUG_MNT" ] && _unmount $SCSI_DEBUG_MNT 2>/dev/null
+	_put_scsi_debug_dev
+}
+
+# Test with PI fully enabled
+test_dif 1 1
+test_dif 2 1
+test_dif 3 1
+
+# Test with strip / insert in the HBA
+test_dif 1 0
+test_dif 2 0
+test_dif 3 0
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/2301.out b/tests/generic/2301.out
new file mode 100644
index 000000000000..dda88676a219
--- /dev/null
+++ b/tests/generic/2301.out
@@ -0,0 +1,73 @@
+QA output created by 2301
+Testing direct I/O for DIF type 1 (enabled: 1)
+fsx -N 10000 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 128000 -l 500000 -r BSIZE -w BSIZE -Z -W
+Testing buffered I/O for DIF type 1 (enabled: 1)
+fsx -N 10000 -l 500000
+fsx -N 10000 -o 8192 -l 500000
+fsx -N 10000 -o 32768 -l 500000
+fsx -N 10000 -o 128000 -l 500000
+Testing direct I/O for DIF type 2 (enabled: 1)
+fsx -N 10000 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 128000 -l 500000 -r BSIZE -w BSIZE -Z -W
+Testing buffered I/O for DIF type 2 (enabled: 1)
+fsx -N 10000 -l 500000
+fsx -N 10000 -o 8192 -l 500000
+fsx -N 10000 -o 32768 -l 500000
+fsx -N 10000 -o 128000 -l 500000
+Testing direct I/O for DIF type 3 (enabled: 1)
+fsx -N 10000 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 128000 -l 500000 -r BSIZE -w BSIZE -Z -W
+Testing buffered I/O for DIF type 3 (enabled: 1)
+fsx -N 10000 -l 500000
+fsx -N 10000 -o 8192 -l 500000
+fsx -N 10000 -o 32768 -l 500000
+fsx -N 10000 -o 128000 -l 500000
+Testing direct I/O for DIF type 1 (enabled: 0)
+fsx -N 10000 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 128000 -l 500000 -r BSIZE -w BSIZE -Z -W
+Testing buffered I/O for DIF type 1 (enabled: 0)
+fsx -N 10000 -l 500000
+fsx -N 10000 -o 8192 -l 500000
+fsx -N 10000 -o 32768 -l 500000
+fsx -N 10000 -o 128000 -l 500000
+Testing direct I/O for DIF type 2 (enabled: 0)
+fsx -N 10000 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 128000 -l 500000 -r BSIZE -w BSIZE -Z -W
+Testing buffered I/O for DIF type 2 (enabled: 0)
+fsx -N 10000 -l 500000
+fsx -N 10000 -o 8192 -l 500000
+fsx -N 10000 -o 32768 -l 500000
+fsx -N 10000 -o 128000 -l 500000
+Testing direct I/O for DIF type 3 (enabled: 0)
+fsx -N 10000 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 8192 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 32768 -l 500000 -r BSIZE -w BSIZE -Z -R -W
+fsx -N 10000 -o 128000 -l 500000 -r BSIZE -w BSIZE -Z -W
+Testing buffered I/O for DIF type 3 (enabled: 0)
+fsx -N 10000 -l 500000
+fsx -N 10000 -o 8192 -l 500000
+fsx -N 10000 -o 32768 -l 500000
+fsx -N 10000 -o 128000 -l 500000
-- 
2.53.0