[PATCH 17/32] xfs: more reflink tests

Darrick J. Wong
2016-02-11T23:41:17Z

Create a couple of XFS-specific tests -- one to check that growing
and shrinking the refcount btree works and a second one to check
what happens when we hit maximum refcount.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
tests/xfs/169 | 86 +++++++++++++++++++++++++++++++++++++++
tests/xfs/169.out | 7 +++
tests/xfs/179 | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/xfs/179.out | 10 ++++
tests/xfs/group | 4 +-
5 files changed, 224 insertions(+), 1 deletion(-)
create mode 100755 tests/xfs/169
create mode 100644 tests/xfs/169.out
create mode 100755 tests/xfs/179
create mode 100644 tests/xfs/179.out

diff --git a/tests/xfs/169 b/tests/xfs/169
new file mode 100755
index 0000000..996500e
--- /dev/null
+++ b/tests/xfs/169
@@ -0,0 +1,86 @@
+#! /bin/bash
+# FS QA Test No. 169
+#
+# Ensure that we can create enough distinct reflink entries to force creation
+# of a multi-level refcount btree. Delete and recreate a few times to
+# exercise the refcount btree grow/shrink functions.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#-----------------------------------------------------------------------
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ cd /
+ umount $SCRATCH_MNT > /dev/null 2>&1
+ rm -rf $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_reflink
+
+rm -f $seqres.full
+
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+echo "Create the original file blocks"
+blksz="$(stat -f $testdir -c '%S')"
+nr_blks=$((8 * blksz / 12))
+
+for i in 1 2 x; do
+ _pwrite_byte 0x61 0 $((blksz * nr_blks)) $testdir/file1 >> $seqres.full
+
+ echo "$i: Reflink every other block"
+ seq 1 2 $((nr_blks - 1)) | while read nr; do
+ _reflink_range $testdir/file1 $((nr * blksz)) \
+ $testdir/file2 $((nr * blksz)) $blksz >> $seqres.full
+ done
+ umount $SCRATCH_MNT
+ _check_scratch_fs
+ _scratch_mount
+
+ test $i = "x" && break
+
+ echo "$i: Delete both files"
+ rm -rf $testdir/file1 $testdir/file2
+ umount $SCRATCH_MNT
+ _check_scratch_fs
+ _scratch_mount
+done
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/169.out b/tests/xfs/169.out
new file mode 100644
index 0000000..1159e30
--- /dev/null
+++ b/tests/xfs/169.out
@@ -0,0 +1,7 @@
+QA output created by 169
+Create the original file blocks
+1: Reflink every other block
+1: Delete both files
+2: Reflink every other block
+2: Delete both files
+x: Reflink every other block
diff --git a/tests/xfs/179 b/tests/xfs/179
new file mode 100755
index 0000000..e0b0af8
--- /dev/null
+++ b/tests/xfs/179
@@ -0,0 +1,118 @@
+#! /bin/bash
+# FS QA Test No. 179
+#
+# See how well reflink handles overflowing reflink counts.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#-----------------------------------------------------------------------
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ cd /
+ rm -rf $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_reflink
+_require_scratch_nocheck
+_require_cp_reflink
+_require_test_program "punch-alternating"
+
+rm -f $seqres.full
+
+echo "Format and mount"
+_scratch_mkfs -d agcount=1 > $seqres.full 2>&1
+_scratch_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+
+echo "Create original files"
+_pwrite_byte 0x61 0 $blksz $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+
+echo "Change reference count"
+umount $SCRATCH_MNT
+echo "set refcount to -4" >> $seqres.full
+$XFS_DB_PROG -x -c 'agf 0' -c 'addr refcntroot' -c 'write recs[1].refcount 4294967292' $SCRATCH_DEV >> $seqres.full
+echo "check refcount after setting to -4" >> $seqres.full
+$XFS_DB_PROG -c 'agf 0' -c 'addr refcntroot' -c 'p recs[1]' $SCRATCH_DEV >> $seqres.full
+_scratch_mount >> $seqres.full
+
+echo "Reflink the overlinked file"
+_cp_reflink $testdir/file1 $testdir/file3 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file4 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file5 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file6 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file7 >> $seqres.full
+
+echo "Check scratch fs"
+umount $SCRATCH_MNT
+echo "check refcount after reflinking 5 more times" >> $seqres.full
+$XFS_DB_PROG -c 'agf 0' -c 'addr refcntroot' -c 'p recs[1]' $SCRATCH_DEV >> $seqres.full
+_scratch_mount >> $seqres.full
+
+echo "CoW a couple files"
+_pwrite_byte 0x62 0 $blksz $testdir/file3 >> $seqres.full
+_pwrite_byte 0x62 0 $blksz $testdir/file5 >> $seqres.full
+_pwrite_byte 0x62 0 $blksz $testdir/file7 >> $seqres.full
+
+echo "Check scratch fs"
+umount $SCRATCH_MNT
+echo "check refcount after cowing 3 files" >> $seqres.full
+$XFS_DB_PROG -c 'agf 0' -c 'addr refcntroot' -c 'p recs[1]' $SCRATCH_DEV >> $seqres.full
+_scratch_mount >> $seqres.full
+
+echo "Remove reflinked files"
+rm -rf $testdir/file*
+
+echo "Check scratch fs"
+umount $SCRATCH_MNT
+echo "check refcount after removing all files" >> $seqres.full
+$XFS_DB_PROG -c 'agf 0' -c 'addr refcntroot' -c 'p recs[1]' $SCRATCH_DEV >> $seqres.full
+$XFS_REPAIR_PROG -o force_geometry -n $SCRATCH_DEV >> $seqres.full 2>&1
+res=$?
+if [ $res -eq 0 ]; then
+ # If repair succeeds then format the device so that the post-test
+ # check doesn't fail due to the single AG.
+ _scratch_mkfs >> $seqres.full 2>&1
+else
+ _fail "xfs_repair fails"
+fi
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/179.out b/tests/xfs/179.out
new file mode 100644
index 0000000..4d3e605
--- /dev/null
+++ b/tests/xfs/179.out
@@ -0,0 +1,10 @@
+QA output created by 179
+Format and mount
+Create original files
+Change reference count
+Reflink the overlinked file
+Check scratch fs
+CoW a couple files
+Check scratch fs
+Remove reflinked files
+Check scratch fs
diff --git a/tests/xfs/group b/tests/xfs/group
index 2db3520..f0c1c2b 100644
--- a/tests/xfs/group
+++ b/tests/xfs/group
@@ -127,7 +127,7 @@
127 auto quick clone
128 auto quick clone
129 auto quick clone
-130 fuzzers
+130 fuzzers clone
131 auto quick clone
132 auto quick clone
133 auto quick quota
@@ -166,6 +166,7 @@
166 rw metadata auto quick
167 rw metadata auto stress
168 dmapi
+169 auto quick clone
170 rw filestreams auto quick
171 rw filestreams
172 rw filestreams
@@ -175,6 +176,7 @@
176 dmapi
177 dmapi
178 mkfs other auto
+179 auto quick clone
181 log auto quick
183 rw other auto quick
185 dmapi