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Date: Mon, 29 Jun 2015 21:16:15 -0700
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: david@...morbit.com, darrick.wong@...cle.com
Cc: linux-ext4@...r.kernel.org, linux-btrfs@...r.kernel.org,
fstests@...r.kernel.org, xfs@....sgi.com
Subject: [PATCH 08/11] test reflink for accuracy in free block counts
Check that the free block counts seem to be handled correctly in
the reflink operation and subsequent attempts to rewrite reflinked
copies.
Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
tests/generic/830 | 88 +++++++++++++++++++++++++
tests/generic/830.out | 5 +
tests/generic/831 | 120 ++++++++++++++++++++++++++++++++++
tests/generic/831.out | 11 +++
tests/generic/832 | 143 +++++++++++++++++++++++++++++++++++++++++
tests/generic/832.out | 11 +++
tests/generic/833 | 142 ++++++++++++++++++++++++++++++++++++++++
tests/generic/833.out | 11 +++
tests/generic/834 | 160 ++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/834.out | 16 +++++
tests/generic/835 | 164 +++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/835.out | 16 +++++
tests/generic/836 | 172 +++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/836.out | 36 ++++++++++
tests/generic/group | 7 ++
15 files changed, 1102 insertions(+)
create mode 100755 tests/generic/830
create mode 100644 tests/generic/830.out
create mode 100755 tests/generic/831
create mode 100644 tests/generic/831.out
create mode 100755 tests/generic/832
create mode 100644 tests/generic/832.out
create mode 100755 tests/generic/833
create mode 100644 tests/generic/833.out
create mode 100755 tests/generic/834
create mode 100644 tests/generic/834.out
create mode 100755 tests/generic/835
create mode 100644 tests/generic/835.out
create mode 100755 tests/generic/836
create mode 100644 tests/generic/836.out
diff --git a/tests/generic/830 b/tests/generic/830
new file mode 100755
index 0000000..4862603
--- /dev/null
+++ b/tests/generic/830
@@ -0,0 +1,88 @@
+#! /bin/bash
+# FS QA Test No. 830
+#
+# Ensure that reflinking a file N times doesn't eat a lot of blocks
+# - Create a file and record fs block usage
+# - Create some reflink copies
+# - Compare fs block usage to before
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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.* $TESTDIR
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "fiemap"
+_require_cp_reflink
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original file blocks"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+BLKS=1000
+MARGIN=50
+SZ=$((BLKSZ * BLKS))
+NR=7
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $SZ" $TESTDIR/file1 >> $seqres.full
+sync
+FREE_BLOCKS0=$(stat -f $TESTDIR -c '%f')
+
+echo "Create the reflink copies"
+for i in `seq 2 $NR`; do
+ cp --reflink=always $TESTDIR/file1 $TESTDIR/file.$i
+done
+sync
+FREE_BLOCKS1=$(stat -f $TESTDIR -c '%f')
+
+echo "Compare free block count"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS1))
+if [ $DIFF -gt $MARGIN ]; then
+ echo "Free blocks decreased by more than $((-DIFF))."
+elif [ $DIFF -lt 0 ]; then
+ echo "Free blocks increased by $((-DIFF))?"
+else
+ echo "Looks ok"
+fi
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/830.out b/tests/generic/830.out
new file mode 100644
index 0000000..e2802dd
--- /dev/null
+++ b/tests/generic/830.out
@@ -0,0 +1,5 @@
+QA output created by 830
+Create the original file blocks
+Create the reflink copies
+Compare free block count
+Looks ok
diff --git a/tests/generic/831 b/tests/generic/831
new file mode 100755
index 0000000..4947261
--- /dev/null
+++ b/tests/generic/831
@@ -0,0 +1,120 @@
+#! /bin/bash
+# FS QA Test No. 831
+#
+# Ensure that deleting all copies of a file reflinked N times releases the blocks
+# - Record fs block usage (0)
+# - Create a file and some reflink copies
+# - Record fs block usage (1)
+# - Delete some copies of the file
+# - Record fs block usage (2)
+# - Delete all copies of the file
+# - Compare fs block usage to (2), (1), and (0)
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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.* $TESTDIR
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "fiemap"
+_require_cp_reflink
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original file blocks"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+BLKS=1000
+MARGIN=50
+SZ=$((BLKSZ * BLKS))
+FREE_BLOCKS0=$(stat -f $TESTDIR -c '%f')
+NR=7
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $SZ" $TESTDIR/file1 >> $seqres.full
+sync
+
+echo "Create the reflink copies"
+for i in `seq 2 $NR`; do
+ cp --reflink=always $TESTDIR/file1 $TESTDIR/file.$i
+done
+cp --reflink=always $TESTDIR/file1 $TESTDIR/survivor
+sync
+FREE_BLOCKS1=$(stat -f $TESTDIR -c '%f')
+
+echo "Delete most of the files"
+rm -rf $TESTDIR/file*
+sync
+FREE_BLOCKS2=$(stat -f $TESTDIR -c '%f')
+
+echo "Delete all the files"
+rm -rf $TESTDIR/*
+sync
+FREE_BLOCKS3=$(stat -f $TESTDIR -c '%f')
+#echo $FREE_BLOCKS0 $FREE_BLOCKS1 $FREE_BLOCKS2 $FREE_BLOCKS3
+
+echo "Did we eat a ton of blocks?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS1))
+if [ $DIFF -lt $BLKS ]; then
+ echo "Reflinking only ate $DIFF blocks, expected $BLKS"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we not get anything back when we didn't delete everything?"
+DIFF=$((FREE_BLOCKS1 - FREE_BLOCKS2))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we get all the blocks back when we deleted everything?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS3))
+if [ $DIFF -gt $MARGIN ]; then
+ echo "Free blocks decreased by more than $((-DIFF))."
+elif [ $DIFF -lt 0 ]; then
+ echo "Free blocks increased by $((-DIFF))?"
+else
+ echo "Looks ok"
+fi
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/831.out b/tests/generic/831.out
new file mode 100644
index 0000000..6f48729
--- /dev/null
+++ b/tests/generic/831.out
@@ -0,0 +1,11 @@
+QA output created by 831
+Create the original file blocks
+Create the reflink copies
+Delete most of the files
+Delete all the files
+Did we eat a ton of blocks?
+Looks ok
+Did we not get anything back when we didn't delete everything?
+Looks ok
+Did we get all the blocks back when we deleted everything?
+Looks ok
diff --git a/tests/generic/832 b/tests/generic/832
new file mode 100755
index 0000000..df116c6
--- /dev/null
+++ b/tests/generic/832
@@ -0,0 +1,143 @@
+#! /bin/bash
+# FS QA Test No. 832
+#
+# Ensure that punching all copies of a file reflinked N times releases the blocks
+# - Record fs block usage (0)
+# - Create a file and some reflink copies
+# - Record fs block usage (1)
+# - Punch some blocks of the copies
+# - Record fs block usage (2)
+# - Punch all blocks of the copies
+# - Compare fs block usage to (2), (1), and (0)
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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.* $TESTDIR
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "fiemap"
+_require_xfs_io_command "fpunch"
+_require_cp_reflink
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original file blocks"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+BLKS=1000
+MARGIN=50
+SZ=$((BLKSZ * BLKS))
+FREE_BLOCKS0=$(stat -f $TESTDIR -c '%f')
+NR=4
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $SZ" $TESTDIR/file1 >> $seqres.full
+sync
+
+echo "Create the reflink copies"
+for i in `seq 2 $NR`; do
+ cp --reflink=always $TESTDIR/file1 $TESTDIR/file.$i
+done
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ || echo "Sections should match"
+FREE_BLOCKS1=$(stat -f $TESTDIR -c '%f')
+
+echo "Punch most of the blocks"
+$XFS_IO_PROG -f -c "fpunch 0 $((BLKS * BLKSZ))" $TESTDIR/file.2
+$XFS_IO_PROG -f -c "fpunch 0 $((BLKS / 2 * BLKSZ))" $TESTDIR/file.3
+$XFS_IO_PROG -f -c "fpunch $((BLKS / 2 * BLKSZ)) $((BLKS / 2 * BLKSZ))" $TESTDIR/file.4
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ && echo "Sections should not match"
+FREE_BLOCKS2=$(stat -f $TESTDIR -c '%f')
+
+echo "Punch all the files"
+for i in `seq 2 $NR`; do
+ $XFS_IO_PROG -f -c "fpunch 0 $((BLKS * BLKSZ))" $TESTDIR/file.$i
+done
+$XFS_IO_PROG -f -c "fpunch 0 $((BLKS * BLKSZ))" $TESTDIR/file1
+sync
+FREE_BLOCKS3=$(stat -f $TESTDIR -c '%f')
+#echo $FREE_BLOCKS0 $FREE_BLOCKS1 $FREE_BLOCKS2 $FREE_BLOCKS3
+
+echo "Did we eat a ton of blocks?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS1))
+if [ $DIFF -lt $BLKS ]; then
+ echo "Reflinking only ate $DIFF blocks, expected $BLKS"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we not get anything back when we didn't punch everything?"
+DIFF=$((FREE_BLOCKS1 - FREE_BLOCKS2))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we get all the blocks back when we punch everything?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS3))
+if [ $DIFF -gt $MARGIN ]; then
+ echo "Free blocks decreased by more than $((-DIFF))."
+elif [ $DIFF -lt 0 ]; then
+ echo "Free blocks increased by $((-DIFF))?"
+else
+ echo "Looks ok"
+fi
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/832.out b/tests/generic/832.out
new file mode 100644
index 0000000..d0c1d82
--- /dev/null
+++ b/tests/generic/832.out
@@ -0,0 +1,11 @@
+QA output created by 832
+Create the original file blocks
+Create the reflink copies
+Punch most of the blocks
+Punch all the files
+Did we eat a ton of blocks?
+Looks ok
+Did we not get anything back when we didn't punch everything?
+Looks ok
+Did we get all the blocks back when we punch everything?
+Looks ok
diff --git a/tests/generic/833 b/tests/generic/833
new file mode 100755
index 0000000..e37bf41
--- /dev/null
+++ b/tests/generic/833
@@ -0,0 +1,142 @@
+#! /bin/bash
+# FS QA Test No. 833
+#
+# Ensure that collapse-range on all copies of a file reflinked N times releases the blocks
+# - Record fs block usage (0)
+# - Create a file and some reflink copies
+# - Record fs block usage (1)
+# - Collapse-range some blocks of the copies
+# - Record fs block usage (2)
+# - Truncate all blocks of the copies
+# - Compare fs block usage to (2), (1), and (0)
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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.* $TESTDIR
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "fiemap"
+_require_xfs_io_command "fcollapse"
+_require_cp_reflink
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original file blocks"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+BLKS=1000
+MARGIN=50
+SZ=$((BLKSZ * BLKS))
+FREE_BLOCKS0=$(stat -f $TESTDIR -c '%f')
+NR=4
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $SZ" $TESTDIR/file1 >> $seqres.full
+sync
+
+echo "Create the reflink copies"
+for i in `seq 2 $NR`; do
+ cp --reflink=always $TESTDIR/file1 $TESTDIR/file.$i
+done
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ || echo "Sections should match"
+FREE_BLOCKS1=$(stat -f $TESTDIR -c '%f')
+
+echo "Collapse most of the blocks"
+$XFS_IO_PROG -f -c "fcollapse 0 $(((BLKS - 1) * BLKSZ))" $TESTDIR/file.2
+$XFS_IO_PROG -f -c "fcollapse 0 $((BLKS / 2 * BLKSZ))" $TESTDIR/file.3
+$XFS_IO_PROG -f -c "fcollapse $((BLKS / 2 * BLKSZ)) $(( ((BLKS / 2) - 1) * BLKSZ))" $TESTDIR/file.4
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ && echo "Sections should not match"
+FREE_BLOCKS2=$(stat -f $TESTDIR -c '%f')
+
+echo "Collpase range nearly all the files"
+$XFS_IO_PROG -f -c "fcollapse 0 $(( ((BLKS / 2) - 1) * BLKSZ))" $TESTDIR/file.3
+$XFS_IO_PROG -f -c "fcollapse 0 $(( (BLKS / 2) * BLKSZ))" $TESTDIR/file.4
+$XFS_IO_PROG -f -c "fcollapse 0 $(( (BLKS - 1) * BLKSZ))" $TESTDIR/file1
+sync
+FREE_BLOCKS3=$(stat -f $TESTDIR -c '%f')
+#echo $FREE_BLOCKS0 $FREE_BLOCKS1 $FREE_BLOCKS2 $FREE_BLOCKS3
+
+echo "Did we eat a ton of blocks?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS1))
+if [ $DIFF -lt $BLKS ]; then
+ echo "Reflinking only ate $DIFF blocks, expected $BLKS"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we not get anything back when we didn't collapse everything?"
+DIFF=$((FREE_BLOCKS1 - FREE_BLOCKS2))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we get all the blocks back when we collapse everything?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS3))
+if [ $DIFF -gt $MARGIN ]; then
+ echo "Free blocks decreased by more than $((-DIFF))."
+elif [ $DIFF -lt 0 ]; then
+ echo "Free blocks increased by $((-DIFF))?"
+else
+ echo "Looks ok"
+fi
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/833.out b/tests/generic/833.out
new file mode 100644
index 0000000..5c72303
--- /dev/null
+++ b/tests/generic/833.out
@@ -0,0 +1,11 @@
+QA output created by 833
+Create the original file blocks
+Create the reflink copies
+Collapse most of the blocks
+Collpase range nearly all the files
+Did we eat a ton of blocks?
+Looks ok
+Did we not get anything back when we didn't collapse everything?
+Looks ok
+Did we get all the blocks back when we collapse everything?
+Looks ok
diff --git a/tests/generic/834 b/tests/generic/834
new file mode 100755
index 0000000..8e8fafd
--- /dev/null
+++ b/tests/generic/834
@@ -0,0 +1,160 @@
+#! /bin/bash
+# FS QA Test No. 834
+#
+# Ensure that CoW on all copies of a file reflinked N times increases block count
+# - Record fs block usage (0)
+# - Create a file and some reflink copies
+# - Record fs block usage (1)
+# - CoW some blocks of the copies
+# - Record fs block usage (2)
+# - CoW all the rest of the blocks of the copies
+# - Compare fs block usage to (2), (1), and (0)
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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.* $TESTDIR
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "fiemap"
+_require_cp_reflink
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original file blocks"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+BLKS=1000
+MARGIN=50
+SZ=$((BLKSZ * BLKS))
+FREE_BLOCKS0=$(stat -f $TESTDIR -c '%f')
+NR=4
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $SZ" $TESTDIR/file1 >> $seqres.full
+sync
+
+echo "Create the reflink copies"
+for i in `seq 2 $NR`; do
+ cp --reflink=always $TESTDIR/file1 $TESTDIR/file.$i
+done
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ || echo "Sections should match"
+FREE_BLOCKS1=$(stat -f $TESTDIR -c '%f')
+
+echo "Rewrite some of the blocks"
+$XFS_IO_PROG -f -c "pwrite -S 0x62 0 $((BLKS * BLKSZ))" $TESTDIR/file.2 > /dev/null
+$XFS_IO_PROG -f -c "pwrite -S 0x63 0 $((BLKS / 2 * BLKSZ))" $TESTDIR/file.3 > /dev/null
+$XFS_IO_PROG -f -c "pwrite -S 0x64 $((BLKS / 2 * BLKSZ)) $((BLKS / 2 * BLKSZ))" $TESTDIR/file.4 > /dev/null
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ && echo "Sections should not match"
+FREE_BLOCKS2=$(stat -f $TESTDIR -c '%f')
+
+echo "Rewrite all the files"
+$XFS_IO_PROG -f -c "pwrite -S 0x62 0 $((BLKS * BLKSZ))" $TESTDIR/file.2 > /dev/null
+$XFS_IO_PROG -f -c "pwrite -S 0x63 0 $((BLKS * BLKSZ))" $TESTDIR/file.3 > /dev/null
+$XFS_IO_PROG -f -c "pwrite -S 0x64 0 $((BLKS * BLKSZ))" $TESTDIR/file.4 > /dev/null
+sync
+FREE_BLOCKS3=$(stat -f $TESTDIR -c '%f')
+
+echo "Rewrite the original file"
+$XFS_IO_PROG -f -c "pwrite -S 0x65 0 $((BLKS * BLKSZ))" $TESTDIR/file1 > /dev/null
+sync
+FREE_BLOCKS4=$(stat -f $TESTDIR -c '%f')
+#echo $FREE_BLOCKS0 $FREE_BLOCKS1 $FREE_BLOCKS2 $FREE_BLOCKS3 $FREE_BLOCKS4
+
+echo "Did we eat a ton of blocks?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS1))
+if [ $DIFF -lt $BLKS ]; then
+ echo "Reflinking only ate $DIFF blocks, expected $BLKS"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we eat the same number of blocks we partially CoWd?"
+DIFF=$((FREE_BLOCKS1 - FREE_BLOCKS2 - (BLKS * 2) ))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we eat the same number of blocks when we overwrote all the copies?"
+DIFF=$((FREE_BLOCKS2 - FREE_BLOCKS3 - BLKS ))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did overwriting the original file consume no blocks?"
+DIFF=$((FREE_BLOCKS3 - FREE_BLOCKS4))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we use as many blocks overall as we figured on?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS4 - (4 * BLKS) ))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/834.out b/tests/generic/834.out
new file mode 100644
index 0000000..1758c71
--- /dev/null
+++ b/tests/generic/834.out
@@ -0,0 +1,16 @@
+QA output created by 834
+Create the original file blocks
+Create the reflink copies
+Rewrite some of the blocks
+Rewrite all the files
+Rewrite the original file
+Did we eat a ton of blocks?
+Looks ok
+Did we eat the same number of blocks we partially CoWd?
+Looks ok
+Did we eat the same number of blocks when we overwrote all the copies?
+Looks ok
+Did overwriting the original file consume no blocks?
+Looks ok
+Did we use as many blocks overall as we figured on?
+Looks ok
diff --git a/tests/generic/835 b/tests/generic/835
new file mode 100755
index 0000000..ce07c7d
--- /dev/null
+++ b/tests/generic/835
@@ -0,0 +1,164 @@
+#! /bin/bash
+# FS QA Test No. 835
+#
+# Ensure that CoW on all copies of a file reflinked N times increases block count
+# - Record fs block usage (0)
+# - Create a file and some reflink copies
+# - Record fs block usage (1)
+# - CoW some blocks of the copies
+# - Record fs block usage (2)
+# - CoW all the rest of the blocks of the copies
+# - Compare fs block usage to (2), (1), and (0)
+#
+# The main difference from 834 is that we use zero range, directio, and
+# mmap to mix things up a bit.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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.* $TESTDIR
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "fiemap"
+_require_xfs_io_command "fzero"
+_require_cp_reflink
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original file blocks"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+BLKS=1000
+MARGIN=50
+SZ=$((BLKSZ * BLKS))
+FREE_BLOCKS0=$(stat -f $TESTDIR -c '%f')
+NR=4
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $SZ" $TESTDIR/file1 >> $seqres.full
+sync
+
+echo "Create the reflink copies"
+for i in `seq 2 $NR`; do
+ cp --reflink=always $TESTDIR/file1 $TESTDIR/file.$i
+done
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ || echo "Sections should match"
+FREE_BLOCKS1=$(stat -f $TESTDIR -c '%f')
+
+echo "Rewrite some of the blocks"
+$XFS_IO_PROG -f -c "fzero 0 $((BLKS * BLKSZ))" $TESTDIR/file.2 > /dev/null
+$XFS_IO_PROG -d -f -c "pwrite -S 0x63 0 $((BLKS / 2 * BLKSZ))" $TESTDIR/file.3 > /dev/null
+$XFS_IO_PROG -f -c "mmap -rw 0 $((BLKS * BLKSZ))" -c "mwrite -S 0x64 $((BLKS / 2 * BLKSZ)) $((BLKS / 2 * BLKSZ))" $TESTDIR/file.4 > /dev/null
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ && echo "Sections should not match"
+FREE_BLOCKS2=$(stat -f $TESTDIR -c '%f')
+
+echo "Rewrite all the files"
+$XFS_IO_PROG -d -f -c "pwrite -S 0x62 0 $((BLKS * BLKSZ))" $TESTDIR/file.2 > /dev/null
+$XFS_IO_PROG -f -c "mmap -rw 0 $((BLKS * BLKSZ))" -c "mwrite -S 0x63 0 $((BLKS * BLKSZ))" $TESTDIR/file.3 > /dev/null
+$XFS_IO_PROG -f -c "fzero 0 $((BLKS * BLKSZ))" $TESTDIR/file.4 > /dev/null
+sync
+FREE_BLOCKS3=$(stat -f $TESTDIR -c '%f')
+
+echo "Rewrite the original file"
+$XFS_IO_PROG -f -c "pwrite -S 0x65 0 $((BLKS * BLKSZ))" $TESTDIR/file1 > /dev/null
+sync
+FREE_BLOCKS4=$(stat -f $TESTDIR -c '%f')
+#echo $FREE_BLOCKS0 $FREE_BLOCKS1 $FREE_BLOCKS2 $FREE_BLOCKS3 $FREE_BLOCKS4
+
+echo "Did we eat a ton of blocks?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS1))
+if [ $DIFF -lt $BLKS ]; then
+ echo "Reflinking only ate $DIFF blocks, expected $BLKS"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we eat the same number of blocks we partially CoWd?"
+DIFF=$((FREE_BLOCKS1 - FREE_BLOCKS2 - (BLKS * 2) ))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we eat the same number of blocks when we overwrote all the copies?"
+DIFF=$((FREE_BLOCKS2 - FREE_BLOCKS3 - BLKS ))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did overwriting the original file consume no blocks?"
+DIFF=$((FREE_BLOCKS3 - FREE_BLOCKS4))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we use as many blocks overall as we figured on?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS4 - (4 * BLKS) ))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/835.out b/tests/generic/835.out
new file mode 100644
index 0000000..d280e67
--- /dev/null
+++ b/tests/generic/835.out
@@ -0,0 +1,16 @@
+QA output created by 835
+Create the original file blocks
+Create the reflink copies
+Rewrite some of the blocks
+Rewrite all the files
+Rewrite the original file
+Did we eat a ton of blocks?
+Looks ok
+Did we eat the same number of blocks we partially CoWd?
+Looks ok
+Did we eat the same number of blocks when we overwrote all the copies?
+Looks ok
+Did overwriting the original file consume no blocks?
+Looks ok
+Did we use as many blocks overall as we figured on?
+Looks ok
diff --git a/tests/generic/836 b/tests/generic/836
new file mode 100755
index 0000000..2c27f37
--- /dev/null
+++ b/tests/generic/836
@@ -0,0 +1,172 @@
+#! /bin/bash
+# FS QA Test No. 836
+#
+# Ensure that chattr +C on reflinked files actually CoWs the files and
+# removes the inode flag.
+# - Record fs block usage (0)
+# - Create a file and some reflink copies
+# - Record fs block usage (1)
+# - chattr +C the copies
+# - Compare fs block usage to (2), (1), and (0)
+# - Compare the extent lists of the copies
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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.* $TESTDIR
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+
+if [ $FSTYP = "btrfs" ]; then
+ _notrun "btrfs doesn't handle chattr +C on non-empty files"
+fi
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "fiemap"
+_require_cp_reflink
+_require_test
+_require_attrs
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original file blocks"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+BLKS=1000
+MARGIN=50
+SZ=$((BLKSZ * BLKS))
+FREE_BLOCKS0=$(stat -f $TESTDIR -c '%f')
+NR=4
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $SZ" $TESTDIR/file1 >> $seqres.full
+sync
+
+echo "Create the reflink copies"
+for i in `seq 2 $NR`; do
+ cp --reflink=always $TESTDIR/file1 $TESTDIR/file.$i
+done
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ || echo "Sections should match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ || echo "Sections should match"
+FREE_BLOCKS1=$(stat -f $TESTDIR -c '%f')
+lsattr -l $TESTDIR/ | _filter_test_dir
+
+echo "chattr +C some of the copies"
+chattr +C $TESTDIR/file.2
+chattr +C $TESTDIR/file.3
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.2 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.3 | tail -n +2) \
+ && echo "Sections should not match"
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ || echo "Sections should match"
+FREE_BLOCKS2=$(stat -f $TESTDIR -c '%f')
+lsattr -l $TESTDIR/ | _filter_test_dir
+
+echo "chattr +C the rest of the files"
+chattr +C $TESTDIR/file.4
+chattr +C $TESTDIR/file1
+sync
+cmp -s <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file1 | tail -n +2) \
+ <($XFS_IO_PROG -f -c "fiemap -v" $TESTDIR/file.4 | tail -n +2) \
+ && echo "Sections should not match"
+FREE_BLOCKS3=$(stat -f $TESTDIR -c '%f')
+lsattr -l $TESTDIR/ | _filter_test_dir
+
+echo "Rewrite the original file"
+$XFS_IO_PROG -f -c "pwrite -S 0x65 0 $((BLKS * BLKSZ))" $TESTDIR/file1 > /dev/null
+sync
+FREE_BLOCKS4=$(stat -f $TESTDIR -c '%f')
+lsattr -l $TESTDIR/ | _filter_test_dir
+#echo $FREE_BLOCKS0 $FREE_BLOCKS1 $FREE_BLOCKS2 $FREE_BLOCKS3 $FREE_BLOCKS4
+
+echo "Did we eat a ton of blocks?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS1))
+if [ $DIFF -lt $BLKS ]; then
+ echo "Reflinking only ate $DIFF blocks, expected $BLKS"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we eat the same number of blocks we partially CoWd?"
+DIFF=$((FREE_BLOCKS1 - FREE_BLOCKS2 - (BLKS * 2) ))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we eat the same number of blocks when we overwrote all the copies?"
+DIFF=$((FREE_BLOCKS2 - FREE_BLOCKS3 - BLKS ))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did overwriting the original file consume no blocks?"
+DIFF=$((FREE_BLOCKS3 - FREE_BLOCKS4))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+
+echo "Did we use as many blocks overall as we figured on?"
+DIFF=$((FREE_BLOCKS0 - FREE_BLOCKS4 - (4 * BLKS) ))
+if [ $DIFF -gt $MARGIN ] || [ $DIFF -lt -$MARGIN ]; then
+ echo "Free blocks changed by $((-DIFF))"
+else
+ echo "Looks ok"
+fi
+lsattr -l $TESTDIR/ | _filter_test_dir
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/836.out b/tests/generic/836.out
new file mode 100644
index 0000000..eeeb498
--- /dev/null
+++ b/tests/generic/836.out
@@ -0,0 +1,36 @@
+QA output created by 836
+Create the original file blocks
+Create the reflink copies
+TEST_DIR/test-836/file1 ---
+TEST_DIR/test-836/file.2 ---
+TEST_DIR/test-836/file.3 ---
+TEST_DIR/test-836/file.4 ---
+chattr +C some of the copies
+TEST_DIR/test-836/file1 ---
+TEST_DIR/test-836/file.2 No_COW
+TEST_DIR/test-836/file.3 No_COW
+TEST_DIR/test-836/file.4 ---
+chattr +C the rest of the files
+TEST_DIR/test-836/file1 No_COW
+TEST_DIR/test-836/file.2 No_COW
+TEST_DIR/test-836/file.3 No_COW
+TEST_DIR/test-836/file.4 No_COW
+Rewrite the original file
+TEST_DIR/test-836/file1 No_COW
+TEST_DIR/test-836/file.2 No_COW
+TEST_DIR/test-836/file.3 No_COW
+TEST_DIR/test-836/file.4 No_COW
+Did we eat a ton of blocks?
+Looks ok
+Did we eat the same number of blocks we partially CoWd?
+Looks ok
+Did we eat the same number of blocks when we overwrote all the copies?
+Looks ok
+Did overwriting the original file consume no blocks?
+Looks ok
+Did we use as many blocks overall as we figured on?
+Looks ok
+TEST_DIR/test-836/file1 No_COW
+TEST_DIR/test-836/file.2 No_COW
+TEST_DIR/test-836/file.3 No_COW
+TEST_DIR/test-836/file.4 No_COW
diff --git a/tests/generic/group b/tests/generic/group
index a599fb2..c0a508d 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -224,5 +224,12 @@
827 auto quick clone
828 auto quick clone
829 auto quick clone
+830 auto quick clone
+831 auto quick clone
+832 auto quick clone
+833 auto quick clone
+834 auto quick clone
+835 auto quick clone
+836 auto quick clone
837 auto quick clone
838 auto quick clone
--
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