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Date: Tue, 06 Oct 2015 22:14:18 -0700
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: david@...morbit.com, darrick.wong@...cle.com
Cc: Anna.Schumaker@...app.com, linux-ext4@...r.kernel.org,
linux-btrfs@...r.kernel.org, fstests@...r.kernel.org,
xfs@....sgi.com
Subject: [PATCH 11/12] reflink: test what happens when we hit resource limits
Add a few horrible opt-in stress tests to see what happens if we try
to reflink the same block billions of times, and what happens if we
run out of space while reflinking a file.
Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
tests/generic/840 | 106 +++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/840.out | 0
tests/generic/841 | 85 +++++++++++++++++++++++++++++++++++++++
tests/generic/841.out | 5 ++
tests/generic/group | 2 +
5 files changed, 198 insertions(+)
create mode 100755 tests/generic/840
create mode 100644 tests/generic/840.out
create mode 100755 tests/generic/841
create mode 100644 tests/generic/841.out
diff --git a/tests/generic/840 b/tests/generic/840
new file mode 100755
index 0000000..50ccae9
--- /dev/null
+++ b/tests/generic/840
@@ -0,0 +1,106 @@
+#! /bin/bash
+# FS QA Test No. 840
+#
+# Try to hit the maximum reference count (eek!)
+#
+# This test runs extremely slowly, so it's not automatically run anywhere.
+#
+#-----------------------------------------------------------------------
+# 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.* $TESTDIR1
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+
+# real QA test starts here
+_require_test
+_require_scratch
+_require_scratch_reflink
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "reflink"
+_require_cp_reflink
+
+rm -f $seqres.full
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_scratch_mount >> $seqres.full 2>&1
+
+TESTDIR=$SCRATCH_MNT/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+# Well let's hope the maximum reflink count is (less than (ha!)) 2^32...
+
+echo "Create a one block file"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $BLKSZ" $TESTDIR/file1 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x62 0 $BLKSZ" $TESTDIR/file2 >> $seqres.full
+
+$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 0 0 $BLKSZ" $TESTDIR/file2 >> $seqres.full
+
+nr=32
+fnr=32
+for i in $(seq 0 $fnr); do
+ echo " ++ Reflink size $i, $(( (2 ** i) * BLKSZ)) bytes" | tee -a $seqres.full
+ $XFS_IO_PROG -f -c "reflink $TESTDIR/file1 0 $(( (2 ** i) * BLKSZ)) $(( (2 ** i) * BLKSZ ))" $TESTDIR/file1 >> $seqres.full || break
+done
+
+nrf=$((nr - fnr))
+echo "Clone $((2 ** nrf)) files"
+for i in $(seq 0 $((2 ** nrf)) ); do
+ cp --reflink=always $TESTDIR/file1 $TESTDIR/file1-$i
+done
+
+echo "Check scratch fs"
+umount $SCRATCH_MNT
+$XFS_DB_PROG -c 'agf 0' -c 'addr rlroot' -c p $SCRATCH_DEV
+_check_scratch_fs
+
+echo "Remove big file and recheck"
+_scratch_mount >> $seqres.full 2>&1
+#rm -rf $TESTDIR/file1
+umount $SCRATCH_MNT
+_check_scratch_fs
+
+echo "Remove all files and recheck"
+_scratch_mount >> $seqres.full 2>&1
+#rm -rf $TESTDIR/file2
+umount $SCRATCH_MNT
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/840.out b/tests/generic/840.out
new file mode 100644
index 0000000..e69de29
diff --git a/tests/generic/841 b/tests/generic/841
new file mode 100755
index 0000000..5cc534e
--- /dev/null
+++ b/tests/generic/841
@@ -0,0 +1,85 @@
+#! /bin/bash
+# FS QA Test No. 841
+#
+# Try to run out of space while cloning?
+#
+#-----------------------------------------------------------------------
+# 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.* $TESTDIR1
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+
+# real QA test starts here
+_require_scratch
+_require_scratch_reflink
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "reflink"
+_require_cp_reflink
+
+rm -f $seqres.full
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_scratch_mount >> $seqres.full 2>&1
+
+TESTDIR=$SCRATCH_MNT/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+NR_FREE="$(stat -f -c '%f' $TESTDIR)"
+echo "Create a big file"
+touch $TESTDIR/file0 $TESTDIR/file1
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $((BLKSZ * NR_FREE))" $TESTDIR/bigfile >> $seqres.full 2>&1
+_scratch_remount
+sz="$(stat -c '%s' $TESTDIR/bigfile)"
+
+blks="$((sz / BLKSZ))"
+echo "Try to reflink"
+seq 0 $blks | while read lblk; do
+ fname="$TESTDIR/file$((lblk % 2))"
+ out="$($XFS_IO_PROG -f -c "reflink $TESTDIR/bigfile $((lblk * BLKSZ)) $((lblk * BLKSZ)) $BLKSZ" $fname 2>&1)"
+ echo "$out" >> $seqres.full
+ test "$out" = "reflink: No space left on device" && break
+done
+
+echo "Check scratch fs"
+umount $SCRATCH_MNT
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/841.out b/tests/generic/841.out
new file mode 100644
index 0000000..33c46fd
--- /dev/null
+++ b/tests/generic/841.out
@@ -0,0 +1,5 @@
+QA output created by 841
+Format and mount
+Create a big file
+Try to reflink
+Check scratch fs
diff --git a/tests/generic/group b/tests/generic/group
index daaf23a..d4f05a9 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -246,3 +246,5 @@
837 auto quick clone
838 auto quick clone
839 auto quick clone
+840 clone_stress
+841 clone_stress
--
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