generic: add direct-io CoW test for mixed&source extents
authorShiyang Ruan <ruansy.fnst@fujitsu.com>
Tue, 14 Dec 2021 08:19:10 +0000 (16:19 +0800)
committerEryu Guan <guaneryu@gmail.com>
Sat, 25 Dec 2021 13:27:42 +0000 (21:27 +0800)
Ensuring that copy on write in direct-io mode works when the CoW
range originally covers multiple extents, mixed with reflinked,
unwritten, hole, regular and delalloc blocks.

Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
tests/generic/668 [new file with mode: 0755]
tests/generic/668.out [new file with mode: 0644]

diff --git a/tests/generic/668 b/tests/generic/668
new file mode 100755 (executable)
index 0000000..b703713
--- /dev/null
@@ -0,0 +1,66 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# FS QA Test No. 668
+#
+# Ensuring that copy on write in direct-io mode works when the CoW
+# range originally covers multiple extents, mixed with reflinked, unwritten,
+# hole, regular and delalloc blocks.
+#   - Create a file with the following repeating sequence of blocks:
+#     1. reflinked
+#     2. unwritten
+#     3. hole
+#     4. regular block
+#     5. delalloc
+#   - directio CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+. ./common/preamble
+_begin_fstest auto quick clone punch
+
+# Import common functions.
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_require_scratch_reflink
+_require_scratch_delalloc
+_require_xfs_io_command "falloc"
+_require_xfs_io_command "fpunch"
+_require_odirect
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_scratch_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+echo "Create the original files"
+blksz=65536
+nr=64
+filesize=$((blksz * nr))
+_sweave_reflink_rainbow $blksz $nr $testdir/file1 $testdir/file3 >> $seqres.full
+_scratch_cycle_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file3 | _filter_scratch
+md5sum $testdir/file1.chk | _filter_scratch
+
+echo "directio CoW across the transition"
+cowoff=$((filesize / 4))
+cowsz=$((filesize / 2))
+_sweave_reflink_rainbow_delalloc $blksz $nr $testdir/file1 >> $seqres.full
+# now cow
+$XFS_IO_PROG -d -f -c "pwrite -S 0x63 -b $cowsz $cowoff $cowsz" $testdir/file1 >> $seqres.full
+_pwrite_byte 0x63 $cowoff $cowsz $testdir/file1.chk >> $seqres.full
+_scratch_cycle_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file3 | _filter_scratch
+md5sum $testdir/file1.chk | _filter_scratch
+
+# success, all done
+status=0
diff --git a/tests/generic/668.out b/tests/generic/668.out
new file mode 100644 (file)
index 0000000..8171d75
--- /dev/null
@@ -0,0 +1,12 @@
+QA output created by 668
+Format and mount
+Create the original files
+Compare files
+6366fd359371414186688a0ef6988893  SCRATCH_MNT/test-668/file1
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-668/file3
+6366fd359371414186688a0ef6988893  SCRATCH_MNT/test-668/file1.chk
+directio CoW across the transition
+Compare files
+26aa3a0749b867ec58363c8539ee5471  SCRATCH_MNT/test-668/file1
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-668/file3
+26aa3a0749b867ec58363c8539ee5471  SCRATCH_MNT/test-668/file1.chk