[PATCH v6 08/12] generic: Stress fsx with atomic writes enabled

[Ojaswin Mujoo <ojaswin@linux.ibm.com>]

Stress file with atomic writes to ensure we exercise codepaths
where we are mixing different FS operations with atomic writes

Suggested-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
---
 tests/generic/1229     | 68 ++++++++++++++++++++++++++++++++++++++++++
 tests/generic/1229.out |  2 ++
 2 files changed, 70 insertions(+)
 create mode 100755 tests/generic/1229
 create mode 100644 tests/generic/1229.out

diff --git a/tests/generic/1229 b/tests/generic/1229
new file mode 100755
index 00000000..6d4dcfed
--- /dev/null
+++ b/tests/generic/1229
@@ -0,0 +1,68 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2025 IBM Corporation. All Rights Reserved.
+#
+# FS QA Test 1229
+#
+# fuzz fsx with atomic writes
+#
+. ./common/preamble
+. ./common/atomicwrites
+_begin_fstest rw auto quick atomicwrites
+
+_require_odirect
+_require_scratch_write_atomic
+
+_scratch_mkfs >> $seqres.full 2>&1
+_scratch_mount  >> $seqres.full 2>&1
+
+testfile=$SCRATCH_MNT/testfile
+touch $testfile
+
+awu_max=$(_get_atomic_write_unit_max $testfile)
+blksz=$(_get_block_size $SCRATCH_MNT)
+bsize=`$here/src/min_dio_alignment $SCRATCH_MNT $SCRATCH_DEV`
+
+set_fsx_avoid() {
+	local file=$1
+
+	case "$FSTYP" in
+	"ext4")
+		local dev=$(findmnt -n -o SOURCE --target $testfile)
+
+		# fsx insert/collapse range support for ext4+bigalloc is
+		# currently broken, so disable it. Also disable in case we
+		# can't detect bigalloc to be on safer side.
+		if [ -z "$DUMPE2FS_PROG" ]; then
+			echo "dumpe2fs not found, disabling insert/collapse range" >> $seqres.full
+			FSX_AVOID+=" -I -C"
+			return
+		fi
+
+		$DUMPE2FS_PROG -h $dev 2>&1 | grep -q bigalloc && {
+			echo "fsx insert/collapse range not supported with bigalloc. Disabling.." >> $seqres.full
+			FSX_AVOID+=" -I -C"
+		}
+		;;
+	*)
+		;;
+	esac
+}
+
+# fsx usage:
+#
+# -N numops: total # operations to do
+# -l flen: the upper bound on file size
+# -o oplen: the upper bound on operation size (64k default)
+# -Z: O_DIRECT ()
+
+set_fsx_avoid
+_run_fsx_on_file $testfile -N 10000 -o $awu_max -A -l 500000 -r $bsize -w $bsize -Z $FSX_AVOID  >> $seqres.full
+if [[ "$?" != "0" ]]
+then
+	_fail "fsx returned error: $?"
+fi
+
+echo "Silence is golden"
+status=0
+exit
diff --git a/tests/generic/1229.out b/tests/generic/1229.out
new file mode 100644
index 00000000..737d61c6
--- /dev/null
+++ b/tests/generic/1229.out
@@ -0,0 +1,2 @@
+QA output created by 1229
+Silence is golden
-- 
2.49.0