[PATCH 11/13] xfs/2306: test mkfs input validation for RT data csum options

[Christoph Hellwig <hch@lst.de>]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 tests/xfs/2306     | 50 ++++++++++++++++++++++++++++++++++++++++++++++
 tests/xfs/2306.out | 20 +++++++++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100755 tests/xfs/2306
 create mode 100644 tests/xfs/2306.out

diff --git a/tests/xfs/2306 b/tests/xfs/2306
new file mode 100755
index 000000000000..76dac5bb2a69
--- /dev/null
+++ b/tests/xfs/2306
@@ -0,0 +1,50 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (c) 2026 Christoph Hellwig.
+#
+# FS QA Test No. 2306
+#
+# Test mkfs input checking for the csum and csumbsize options.
+#
+. ./common/preamble
+_begin_fstest auto quick mkfs zone datacsum
+
+. ./common/filter
+
+_require_scratch_nocheck
+
+expect_fail()
+{
+	opts=$1
+	msg=$2
+
+	echo "Testing $msg (expect failure)"
+	$MKFS_XFS_PROG -f $opts $SCRATCH_DEV 2>&1 | head -n1
+}
+
+expect_fail "-r csum=crc32c" "csum option without zoned"
+expect_fail "-r csumbsize=32k" "csumbsize option without zoned"
+expect_fail "-r zoned,csum=crc16" "invalid csum value"
+expect_fail "-r zoned,csum=crc32c,csumbsize=1k" "too small csumbsize"
+expect_fail "-r zoned,csum=crc32c,csumbsize=48k" "non-pow2 csumbsize"
+expect_fail "-r zoned,csum=crc32c,csumbsize=128k" "too large csumbsize"
+expect_fail "-b size=64k -r zoned,csum=crc32c,csumbsize=32k" "csumbsize < bsize"
+
+expect_pass()
+{
+	opts=$1
+	msg=$2
+
+	echo "Testing $msg (expect pass)"
+	$MKFS_XFS_PROG -f $opts $SCRATCH_DEV >> $seqres.full 2>&1 || \
+		_fail "could not mkfs for $opts"
+}
+
+expect_pass "-r zoned,csum=none" "csum=none"
+expect_pass "-r zoned,csum=crc32c" "csum=crc32c"
+expect_pass "-r zoned,csum=crc64" "csum=crc64"
+expect_pass "-r zoned,csum=crc64,csumbsize=32k" "csum=crc64,csumbsize=32k"
+expect_pass "-r zoned,csum=crc64,csumbsize=64k" "csum=crc64,csumbsize=64k"
+
+status=0
+exit
diff --git a/tests/xfs/2306.out b/tests/xfs/2306.out
new file mode 100644
index 000000000000..5e79103212ad
--- /dev/null
+++ b/tests/xfs/2306.out
@@ -0,0 +1,20 @@
+QA output created by 2306
+Testing csum option without zoned (expect failure)
+data checksums not supported without zoned mode
+Testing csumbsize option without zoned (expect failure)
+RT data csum block size options requires RT data csum type.
+Testing invalid csum value (expect failure)
+unknown option -r crc16
+Testing too small csumbsize (expect failure)
+Invalid value 1k for -r csumbsize option. Value is too small.
+Testing non-pow2 csumbsize (expect failure)
+RT data csum block size of 49152 bytes is not a power of 2
+Testing too large csumbsize (expect failure)
+Invalid value 128k for -r csumbsize option. Value is too large.
+Testing csumbsize < bsize (expect failure)
+RT data csum block size of 32768 bytes is smaller than fsblock size 65536.
+Testing csum=none (expect pass)
+Testing csum=crc32c (expect pass)
+Testing csum=crc64 (expect pass)
+Testing csum=crc64,csumbsize=32k (expect pass)
+Testing csum=crc64,csumbsize=64k (expect pass)
-- 
2.53.0