xfs: test zone stream separation for two buffered writers

Check that two parallel buffered sequential writers are separated into
different zones when writeback happens before closing the files.

Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/tests/xfs/4208 b/tests/xfs/4208
new file mode 100755 (executable)
index 0000000..b851057
--- /dev/null
+++ b/tests/xfs/4208
@@ -0,0 +1,79 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2024 Christoph Hellwig.
+#
+# FS QA Test No. 4208
+#
+# Test that multiple buffered I/O write streams are directed to separate zones
+# when written back with the file still open.
+#
+. ./common/preamble
+_begin_fstest quick auto rw zone
+
+_cleanup()
+{
+       cd /
+       _scratch_unmount >/dev/null 2>&1
+}
+
+# Import common functions.
+. ./common/filter
+
+_require_scratch
+
+_filter_rgno()
+{
+       # the rg number is in column 4 of xfs_bmap output
+       perl -ne '
+               $rg = (split /\s+/)[4] ;
+               if ($rg =~ /\d+/) {print "$rg "} ;
+       '
+}
+
+_scratch_mkfs_xfs >>$seqres.full 2>&1
+_scratch_mount
+_require_xfs_scratch_zoned 3
+
+fio_config=$tmp.fio
+fio_out=$tmp.fio.out
+fio_err=$tmp.fio.err
+
+cat >$fio_config <<EOF
+[global]
+bs=64k
+iodepth=16
+iodepth_batch=8
+size=1m
+directory=$SCRATCH_MNT
+rw=write
+fsync_on_close=1
+
+[file1]
+filename=file1
+size=128m
+
+[file2]
+filename=file2
+size=128m
+EOF
+
+_require_fio $fio_config
+
+$FIO_PROG $fio_config --output=$fio_out
+cat $fio_out >> $seqres.full
+
+# Check the files only have a single extent each and are in separate zones
+extents1=$(_count_extents $SCRATCH_MNT/file1)
+extents2=$(_count_extents $SCRATCH_MNT/file2)
+
+echo "number of file 1 extents: $extents1"
+echo "number of file 2 extents: $extents2"
+
+rg1=`xfs_bmap -v $SCRATCH_MNT/file1 | _filter_rgno`
+rg2=`xfs_bmap -v $SCRATCH_MNT/file2 | _filter_rgno`
+if [ "${rg1}" == "${rg2}" ]; then
+       echo "same RG used for both files"
+fi
+
+status=0
+exit

diff --git a/tests/xfs/4208.out b/tests/xfs/4208.out
new file mode 100644 (file)
index 0000000..1aaea30
--- /dev/null
+++ b/tests/xfs/4208.out
@@ -0,0 +1,3 @@
+QA output created by 4208
+number of file 1 extents: 1
+number of file 2 extents: 1