From: "Ritesh Harjani (IBM)" <ritesh.list@xxxxxxxxx>
We brute force all possible blocksize & clustersize combinations on
a bigalloc filesystem for stressing atomic write using fio data crc
verifier. We run nproc * $LOAD_FACTOR threads in parallel writing to
a single $SCRATCH_MNT/test-file. With atomic writes this test ensures
that we never see the mix of data contents from different threads on
a given bsrange.
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx>
Signed-off-by: Ojaswin Mujoo <ojaswin@xxxxxxxxxxxxx>
---
tests/ext4/061 | 107 +++++++++++++++++++++++++++++++++++++++++++++
tests/ext4/061.out | 2 +
2 files changed, 109 insertions(+)
create mode 100755 tests/ext4/061
create mode 100644 tests/ext4/061.out
diff --git a/tests/ext4/061 b/tests/ext4/061
new file mode 100755
index 00000000..9d656613
--- /dev/null
+++ b/tests/ext4/061
@@ -0,0 +1,107 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2025 IBM Corporation. All Rights Reserved.
+#
+# FS QA Test 061
+#
+# Brute force all possible blocksize clustersize combination on a bigalloc
+# filesystem for stressing atomic write using fio data crc verifier. We run
+# nproc * 2 * $LOAD_FACTOR threads in parallel writing to a single
+# $SCRATCH_MNT/test-file. With fio aio-dio atomic write this test ensures that
+# we should never see the mix of data contents from different threads for any
+# given fio blocksize.
+#
+
+. ./common/preamble
+. ./common/atomicwrites
+
+_begin_fstest auto rw stress atomicwrites
+
+_require_scratch_write_atomic
+
+function max()
+{
+ if (( $1 > $2 )); then
+ echo "$1"
+ else
+ echo "$2"
+ fi
+}
+
+function min()
+{
+ if (( $1 < $2 )); then
+ echo "$1"
+ else
+ echo "$2"
+ fi
+}
+
+FS_MAX_CLUSTER_SIZE=$((128*1024))
+FIO_LOAD=$(($(nproc) * 2 * LOAD_FACTOR))
+SIZE=$((100*1024*1024))
+fiobsize=4096
+
+# Calculate fsblocksize and FS_MAX_CLUSTER_SIZE as per bdev atomic write units.
+bdev_awu_min=$(_get_atomic_write_unit_min $SCRATCH_DEV)
+bdev_awu_max=$(_get_atomic_write_unit_max $SCRATCH_DEV)
+fsblocksize=$(max 4096 "$bdev_awu_min")
+FS_MAX_CLUSTER_SIZE=$(min "$FS_MAX_CLUSTER_SIZE" "$bdev_awu_max")
+
+function create_fio_config()
+{
+cat >$fio_config <<EOF
+ [aio-dio-aw-verify]
+ direct=1
+ ioengine=libaio
+ rw=randwrite
+ bs=$fiobsize
+ fallocate=native
+ filename=$SCRATCH_MNT/test-file
+ size=$SIZE
+ iodepth=$FIO_LOAD
+ numjobs=$FIO_LOAD
+ group_reporting=1
+ verify_state_save=0
+ verify=crc32c
+ verify_fatal=1
+ verify_dump=0
+ verify_backlog=1024
+ verify_async=4
+ verify_write_sequence=0
+ atomic=1
+EOF
+}
+
+# Let's create a sample fio config to check whether fio supports all options.
+fio_config=$tmp.fio
+create_fio_config
+_require_fio $fio_config
+
+for ((fsblocksize=$fsblocksize; fsblocksize <= $(_get_page_size); fsblocksize = $fsblocksize << 1)); do
+ for ((fsclustersize=$fsblocksize; fsclustersize <= $FS_MAX_CLUSTER_SIZE; fsclustersize = $fsclustersize << 1)); do
+ for ((fiobsize = $fsblocksize; fiobsize <= $fsclustersize; fiobsize = $fiobsize << 1)); do
+ MKFS_OPTIONS="-O bigalloc -b $fsblocksize -C $fsclustersize"
+ _scratch_mkfs_ext4 "$MKFS_OPTIONS" >> $seqres.full 2>&1 || continue
+ if _try_scratch_mount >> $seqres.full 2>&1; then
+ touch $SCRATCH_MNT/f1
+ echo "== FIO test for fsblocksize=$fsblocksize fsclustersize=$fsclustersize fiobsize=$fiobsize ==" >> $seqres.full
+ fio_config=$tmp.fio
+ fio_out=$tmp.fio.out
+ create_fio_config
+ _require_fio $fio_config
+ cat $fio_config >> $seqres.full
+ $FIO_PROG $fio_config --output=$fio_out
+ ret=$?
+ cat $fio_out >> $seqres.full
+ _scratch_unmount
+ [[ $ret -eq 0 ]] || break;
+ fi
+ done
+ done
+done
+
+# success, all done
+echo Silence is golden
+status=0
+exit
diff --git a/tests/ext4/061.out b/tests/ext4/061.out
new file mode 100644
index 00000000..273be9e0
--- /dev/null
+++ b/tests/ext4/061.out
@@ -0,0 +1,2 @@
+QA output created by 061
+Silence is golden
--
2.49.0
