[PATCH v2 4/7] btrfs: add fstest for 8k write spanning two stripes on raid-stripe-tree

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

Add a test-case writing 8k to a raid-stripe-tree formatted filesystem with
one stripe pre-filled to 60k so the 8k are split into a 4k write finishing
stripe 1 and a 4k write starting the next stripe.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 tests/btrfs/303     | 58 +++++++++++++++++++++++++++++++++++++
 tests/btrfs/303.out | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 140 insertions(+)

diff --git a/tests/btrfs/303 b/tests/btrfs/303
new file mode 100755
index 000000000000..9f3a5df16423
--- /dev/null
+++ b/tests/btrfs/303
@@ -0,0 +1,58 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2023 Western Digital Cooperation.  All Rights Reserved.
+#
+# FS QA Test 303
+#
+# Test on-disk layout of RAID Stripe Tree Metadata by writing 8k to a new file
+# with a filesystem prepropulated, so that 4k of the write are written to the
+# 1st stripe and 4k start a new stripe.
+#
+. ./common/preamble
+_begin_fstest auto quick raid remount volume raid-stripe-tree
+
+. ./common/filter
+. ./common/filter.btrfs
+
+_supported_fs btrfs
+_require_btrfs_command inspect-internal dump-tree
+_require_btrfs_mkfs_feature "raid-stripe-tree"
+_require_scratch_dev_pool 4
+_require_btrfs_fs_feature "raid_stripe_tree"
+
+test_8k_new_stripe()
+{
+	local profile=$1
+	local ndevs=$2
+
+	_scratch_dev_pool_get $ndevs
+
+	echo "==== Testing $profile ===="
+	_scratch_pool_mkfs -d $profile -m $profile
+	_scratch_mount
+
+	# Fill the first stripe up to 64k - 4k
+	$XFS_IO_PROG -fc "pwrite 0 60k" -c fsync "$SCRATCH_MNT/bar" | _filter_xfs_io
+
+	# The actual 8k write
+	$XFS_IO_PROG -fc "pwrite 0 8k" "$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 8k write to a new file so that 4k start a new stripe ="
+test_8k_new_stripe raid0 2
+test_8k_new_stripe raid1 2
+test_8k_new_stripe raid10 4
+
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/303.out b/tests/btrfs/303.out
new file mode 100644
index 000000000000..1259d0f4a587
--- /dev/null
+++ b/tests/btrfs/303.out
@@ -0,0 +1,82 @@
+QA output created by 303
+= Test 8k write to a new file so that 4k start a new stripe =
+==== Testing raid0 ====
+wrote 61440/61440 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+9d3940adb41dd525e008a847e01b15f4  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 61440) 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 1 physical XXXXXXXXX
+	item 2 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 61440/61440 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+9d3940adb41dd525e008a847e01b15f4  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 61440) itemoff XXXXX itemsize 40
+			encoding: RAID1
+			stripe 0 devid 1 physical XXXXXXXXX
+			stripe 1 devid 2 physical XXXXXXXXX
+	item 1 key (XXXXXX RAID_STRIPE 8192) 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 61440/61440 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 8192/8192 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+9d3940adb41dd525e008a847e01b15f4  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 61440) 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 1 physical XXXXXXXXX
+			stripe 1 devid 2 physical XXXXXXXXX
+	item 2 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