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Date: Fri, 13 Nov 2015 13:38:02 -0800
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: david@...morbit.com, darrick.wong@...cle.com
Cc: fstests@...r.kernel.org, xfs@....sgi.com, hch@...radead.org,
tao.peng@...marydata.com, linux-ext4@...r.kernel.org,
Anna.Schumaker@...app.com, linux-btrfs@...r.kernel.org
Subject: [PATCH 12/12] 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/175 | 99 +++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/175.out | 0
tests/generic/176 | 81 ++++++++++++++++++++++++++++++++++++++++
tests/generic/176.out | 5 ++
tests/generic/group | 2 +
5 files changed, 187 insertions(+)
create mode 100755 tests/generic/175
create mode 100644 tests/generic/175.out
create mode 100755 tests/generic/176
create mode 100644 tests/generic/176.out
diff --git a/tests/generic/175 b/tests/generic/175
new file mode 100755
index 0000000..a7da533
--- /dev/null
+++ b/tests/generic/175
@@ -0,0 +1,99 @@
+#! /bin/bash
+# FS QA Test No. 175
+#
+# 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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_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')"
+_pwrite_byte 0x61 0 $BLKSZ "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 0 $BLKSZ "$TESTDIR/file2" >> "$seqres.full"
+_cp_reflink "$TESTDIR/file1" "$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"
+ n=$(( (2 ** i) * BLKSZ))
+ _reflink_range "$TESTDIR/file1" 0 "$TESTDIR/file1" $n $n >> "$seqres.full" || break
+done
+
+nrf=$((nr - fnr))
+echo "Clone $((2 ** nrf)) files"
+seq 0 $((2 ** nrf)) | while read i; do
+ _cp-reflink "$TESTDIR/file1" "$TESTDIR/file1-$i"
+done
+
+echo "Check scratch fs"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+echo "Remove big file and recheck"
+_scratch_mount >> "$seqres.full" 2>&1
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+echo "Remove all files and recheck"
+_scratch_mount >> "$seqres.full" 2>&1
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/175.out b/tests/generic/175.out
new file mode 100644
index 0000000..e69de29
diff --git a/tests/generic/176 b/tests/generic/176
new file mode 100755
index 0000000..bf930b7
--- /dev/null
+++ b/tests/generic/176
@@ -0,0 +1,81 @@
+#! /bin/bash
+# FS QA Test No. 176
+#
+# 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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_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"
+_pwrite_byte 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$((lblk % 2))"
+ out="$(_reflink_range "$TESTDIR/bigfile" $((lblk * BLKSZ)) "$fname" $((lblk * BLKSZ)) $BLKSZ 2>&1)"
+ echo "$fname: $out" >> "$seqres.full"
+ echo "$out" | grep -q "No space left on device" && break
+done
+
+echo "Check scratch fs"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/176.out b/tests/generic/176.out
new file mode 100644
index 0000000..eec98eb
--- /dev/null
+++ b/tests/generic/176.out
@@ -0,0 +1,5 @@
+QA output created by 176
+Format and mount
+Create a big file
+Try to reflink
+Check scratch fs
diff --git a/tests/generic/group b/tests/generic/group
index 09a7828..8a40797 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -177,6 +177,8 @@
172 auto quick clone
173 auto quick clone
174 auto quick clone
+175 clone_stress
+176 clone_stress
184 metadata auto quick
192 atime auto
193 metadata auto quick
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