[PATCH 3/7] btrfs: add fstest for writing to a file at an offset with RST

[Johannes Thumshirn <johannes.thumshirn@wdc.com>]

Add a fstest writing 4k at offset 64k to a file with one RAID tripe
already pre-filled for a raid-stripe-tree formatted file system.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 tests/btrfs/304     | 57 ++++++++++++++++++++++++++++++++++++++++
 tests/btrfs/304.out | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 132 insertions(+)

diff --git a/tests/btrfs/304 b/tests/btrfs/304
new file mode 100755
index 000000000000..5ef7b2382f7c
--- /dev/null
+++ b/tests/btrfs/304
@@ -0,0 +1,57 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2023 Western Digital Cooperation.  All Rights Reserved.
+#
+# FS QA Test 304
+#
+# Test on-disk layout of RAID Stripe Tree Metadata
+#
+. ./common/preamble
+_begin_fstest auto quick raid remount volume raid-stripe-tree 
+
+. ./common/filter
+. ./common/filter.btrfs
+
+_supported_fs btrfs
+_require_test
+_require_btrfs_command inspect-internal dump-tree
+_require_btrfs_mkfs_feature "raid-stripe-tree"
+_require_scratch_dev_pool 4
+_require_xfs_io_command "pwrite"
+_require_xfs_io_command "fsync"
+_require_btrfs_fs_feature "raid_stripe_tree"
+
+test_4k_write_64koff()
+{
+	profile=$1
+	ndevs=$2
+
+	_scratch_dev_pool_get $ndevs
+
+	echo "==== Testing $profile ===="
+	_scratch_pool_mkfs -d $profile -m $profile
+	_scratch_mount
+
+	# precondition one stripe
+	$XFS_IO_PROG -fc "pwrite 0 64k" "$SCRATCH_MNT/bar" | _filter_xfs_io
+
+	$XFS_IO_PROG -fc "pwrite 64k 4k" "$SCRATCH_MNT/foo" | _filter_xfs_io
+
+	_scratch_cycle_mount
+	md5sum "$SCRATCH_MNT/foo" | _filter_scratch
+
+	_scratch_unmount
+
+	$BTRFS_UTIL_PROG inspect-internal dump-tree -t raid_stripe $SCRATCH_DEV_POOL |\
+		_filter_btrfs_version | _filter_stripe_tree
+
+	_scratch_dev_pool_put
+}
+echo "= Test 4k write to an empty file at offset 64k with one stripe prefilled ="
+test_4k_write_64koff raid0 2
+test_4k_write_64koff raid1 2
+test_4k_write_64koff raid10 4
+
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/304.out b/tests/btrfs/304.out
new file mode 100644
index 000000000000..e94deec1ab21
--- /dev/null
+++ b/tests/btrfs/304.out
@@ -0,0 +1,75 @@
+QA output created by 304
+= Test 4k write to an empty file at offset 64k with one stripe prefilled =
+==== Testing raid0 ====
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+381b0e7d72cb4f75286fe2b445e8d92a  SCRATCH_MNT/foo
+
+raid stripe tree key (RAID_STRIPE_TREE ROOT_ITEM 0) 
+leaf XXXXXXXXX items X free space XXXXX generation X owner RAID_STRIPE_TREE
+leaf XXXXXXXXX flags 0x1(WRITTEN) backref revision 1
+checksum stored <CHECKSUM>
+checksum calced <CHECKSUM>
+fs uuid <UUID>
+chunk uuid <UUID>
+	item 0 key (XXXXXX RAID_STRIPE 65536) itemoff XXXXX itemsize 24
+			encoding: RAID0
+			stripe 0 devid 1 physical XXXXXXXXX
+	item 1 key (XXXXXX RAID_STRIPE 4096) itemoff XXXXX itemsize 24
+			encoding: RAID0
+			stripe 0 devid 2 physical XXXXXXXXX
+total bytes XXXXXXXX
+bytes used XXXXXX
+uuid <UUID>
+==== Testing raid1 ====
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+381b0e7d72cb4f75286fe2b445e8d92a  SCRATCH_MNT/foo
+
+raid stripe tree key (RAID_STRIPE_TREE ROOT_ITEM 0) 
+leaf XXXXXXXXX items X free space XXXXX generation X owner RAID_STRIPE_TREE
+leaf XXXXXXXXX flags 0x1(WRITTEN) backref revision 1
+checksum stored <CHECKSUM>
+checksum calced <CHECKSUM>
+fs uuid <UUID>
+chunk uuid <UUID>
+	item 0 key (XXXXXX RAID_STRIPE 65536) itemoff XXXXX itemsize 40
+			encoding: RAID1
+			stripe 0 devid 1 physical XXXXXXXXX
+			stripe 1 devid 2 physical XXXXXXXXX
+	item 1 key (XXXXXX RAID_STRIPE 4096) itemoff XXXXX itemsize 40
+			encoding: RAID1
+			stripe 0 devid 1 physical XXXXXXXXX
+			stripe 1 devid 2 physical XXXXXXXXX
+total bytes XXXXXXXX
+bytes used XXXXXX
+uuid <UUID>
+==== Testing raid10 ====
+wrote 65536/65536 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 4096/4096 bytes at offset 65536
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+381b0e7d72cb4f75286fe2b445e8d92a  SCRATCH_MNT/foo
+
+raid stripe tree key (RAID_STRIPE_TREE ROOT_ITEM 0) 
+leaf XXXXXXXXX items X free space XXXXX generation X owner RAID_STRIPE_TREE
+leaf XXXXXXXXX flags 0x1(WRITTEN) backref revision 1
+checksum stored <CHECKSUM>
+checksum calced <CHECKSUM>
+fs uuid <UUID>
+chunk uuid <UUID>
+	item 0 key (XXXXXX RAID_STRIPE 65536) itemoff XXXXX itemsize 40
+			encoding: RAID10
+			stripe 0 devid 1 physical XXXXXXXXX
+			stripe 1 devid 2 physical XXXXXXXXX
+	item 1 key (XXXXXX RAID_STRIPE 4096) itemoff XXXXX itemsize 40
+			encoding: RAID10
+			stripe 0 devid 3 physical XXXXXXXXX
+			stripe 1 devid 4 physical XXXXXXXXX
+total bytes XXXXXXXX
+bytes used XXXXXX
+uuid <UUID>

-- 
2.43.0