Ensuring that copy on write in mmap mode works when the CoW range originally
covers multiple extents, mixed with reflinked, unwritten, hole, regular and
delalloc blocks.
(MMAP version of generic/200,199)
Also, add a check to make sure the delalloc block is accutally exist.
Signed-off-by: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx>
---
common/reflink | 3 ++
tests/generic/905 | 68 +++++++++++++++++++++++++++++++++++++++++++
tests/generic/905.out | 12 ++++++++
3 files changed, 83 insertions(+)
create mode 100755 tests/generic/905
create mode 100644 tests/generic/905.out
diff --git a/common/reflink b/common/reflink
index 38210673..84173d59 100644
--- a/common/reflink
+++ b/common/reflink
@@ -362,6 +362,9 @@ _weave_reflink_rainbow_delalloc() {
_pwrite_byte 0x62 $((blksz * i)) $blksz $dfile
_pwrite_byte 0x62 $((blksz * i)) $blksz $dfile.chk
done
+ # make sure we actually got delalloc block
+ $FILEFRAG_PROG -v $dfile 2>&1 | grep -q delalloc || \
+ _notrun "test requires delayed allocation writes"
}
# Make the source file have interleaved regular blocks and reflinked blocks
diff --git a/tests/generic/905 b/tests/generic/905
new file mode 100755
index 00000000..56cdcd27
--- /dev/null
+++ b/tests/generic/905
@@ -0,0 +1,68 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# FS QA Test No. 905
+#
+# Ensuring that copy on write in mmap mode works when the CoW
+# range originally covers multiple extents, mixed with reflinked, unwritten,
+# hole, regular and delalloc blocks.
+# (MMAP version of generic/200,199)
+# - Create a file with the following repeating sequence of blocks:
+# 1. reflinked
+# 2. unwritten
+# 3. hole
+# 4. regular block
+# 5. delalloc
+# - mmap 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_xfs_io_command "falloc"
+_require_xfs_io_command "fpunch"
+_require_cp_reflink
+_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))
+_weave_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 $testdir/file3.chk | _filter_scratch
+
+echo "mmap CoW across the transition"
+cowoff=$((filesize / 4))
+cowsz=$((filesize / 2))
+_weave_reflink_rainbow_delalloc $blksz $nr $testdir/file3 >> $seqres.full
+# now cow
+mmapsz=$((cowoff + cowsz))
+_mwrite_byte 0x63 $cowoff $cowsz $mmapsz $testdir/file3 >> $seqres.full
+_mwrite_byte 0x63 $cowoff $cowsz $mmapsz $testdir/file3.chk >> $seqres.full
+_scratch_cycle_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file3 | _filter_scratch
+md5sum $testdir/file3.chk | _filter_scratch
+
+# success, all done
+status=0
diff --git a/tests/generic/905.out b/tests/generic/905.out
new file mode 100644
index 00000000..6fb0be5f
--- /dev/null
+++ b/tests/generic/905.out
@@ -0,0 +1,12 @@
+QA output created by 905
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-905/file1
+6366fd359371414186688a0ef6988893 SCRATCH_MNT/test-905/file3
+6366fd359371414186688a0ef6988893 SCRATCH_MNT/test-905/file3.chk
+mmap CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-905/file1
+26aa3a0749b867ec58363c8539ee5471 SCRATCH_MNT/test-905/file3
+26aa3a0749b867ec58363c8539ee5471 SCRATCH_MNT/test-905/file3.chk
--
2.34.0
