[PATCH 23/23] reflink: test reflink+cow+enospc all at the same time

Darrick J. Wong
2016-02-09T01:14:21Z

Set up an impossibly small filesystem and try to reflink and rewrite a
file on it to see what happens when we ENOSPC. Basically
generic/16[67] but with a constrained fs size.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
tests/generic/166 | 6 ++-
tests/generic/167 | 6 ++-
tests/generic/333 | 104 +++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/333.out | 6 +++
tests/generic/334 | 104 +++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/334.out | 6 +++
tests/generic/group | 2 +
7 files changed, 232 insertions(+), 2 deletions(-)
create mode 100755 tests/generic/333
create mode 100644 tests/generic/333.out
create mode 100755 tests/generic/334
create mode 100644 tests/generic/334.out

diff --git a/tests/generic/166 b/tests/generic/166
index 2c2ff4e..30d76a0 100755
--- a/tests/generic/166
+++ b/tests/generic/166
@@ -69,7 +69,11 @@ _scratch_remount
snappy() {
n=0
while [ ! -e "$testdir/finished" ]; do
- _cp_reflink "$testdir/file1" "$testdir/snap_$n" || break
+ out="$(_cp_reflink "$testdir/file1" "$testdir/snap_$n" 2>&1)"
+ res=$?
+ echo "$out" | grep -q "No space left" && break
+ test -n "$out" && echo "$out"
+ test $res -ne 0 && break
n=$((n + 1))
done
}
diff --git a/tests/generic/167 b/tests/generic/167
index b80b481..5198a81 100755
--- a/tests/generic/167
+++ b/tests/generic/167
@@ -69,7 +69,11 @@ _scratch_remount
snappy() {
n=0
while [ ! -e "$testdir/finished" ]; do
- _cp_reflink "$testdir/file1" "$testdir/snap_$n" || break
+ out="$(_cp_reflink "$testdir/file1" "$testdir/snap_$n" 2>&1)"
+ res=$?
+ echo "$out" | grep -q "No space left" && break
+ test -n "$out" && echo "$out"
+ test $res -ne 0 && break
n=$((n + 1))
done
}
diff --git a/tests/generic/333 b/tests/generic/333
new file mode 100755
index 0000000..4ca7803
--- /dev/null
+++ b/tests/generic/333
@@ -0,0 +1,104 @@
+#! /bin/bash
+# FS QA Test No. 333
+#
+# Test for races or FS corruption when trying to hit ENOSPC while DIO writing
+# to a file that's also the source of a reflink operation.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016 Oracle, Inc. 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 7 15
+
+_cleanup()
+{
+ cd /
+ rm -rf "$tmp".*
+ wait
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+
+echo "Format and mount"
+_scratch_mkfs_sized $((400 * 1048576)) > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+testdir="$SCRATCH_MNT/test-$seq"
+rm -rf "$testdir"
+mkdir "$testdir"
+
+loops=1024
+nr_loops=$((loops - 1))
+blksz=65536
+
+echo "Initialize file"
+echo > "$seqres.full"
+_pwrite_byte 0x61 0 $((loops * blksz)) "$testdir/file1" >> "$seqres.full"
+_scratch_remount
+
+# Snapshot creator...
+snappy() {
+ n=0
+ while [ ! -e "$testdir/finished" ]; do
+ out="$(_cp_reflink "$testdir/file1" "$testdir/snap_$n" 2>&1)"
+ res=$?
+ echo "$out" | grep -q "No space left" && break
+ test -n "$out" && echo "$out"
+ test $res -ne 0 && break
+ n=$((n + 1))
+ done
+ touch "$testdir/abort"
+}
+
+echo "Snapshot a file undergoing directio rewrite"
+snappy &
+seq 1 1000 | while read i; do
+ seq $nr_loops -1 0 | while read i; do
+ out="$(_pwrite_byte 0x63 $((i * blksz)) $blksz -d "$testdir/file1" 2>&1)"
+ echo "$out" >> "$seqres.full"
+ echo "$out" | grep -q "No space left" && touch "$testdir/abort"
+ echo "$out" | grep -qi "error" && touch "$testdir/abort"
+ test -e "$testdir/abort" && break
+ done
+ test -e "$testdir/abort" && break
+done
+touch "$testdir/finished"
+wait
+
+echo "Check for damage"
+_scratch_unmount
+
+echo "Done"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/333.out b/tests/generic/333.out
new file mode 100644
index 0000000..501f2d6
--- /dev/null
+++ b/tests/generic/333.out
@@ -0,0 +1,6 @@
+QA output created by 333
+Format and mount
+Initialize file
+Snapshot a file undergoing directio rewrite
+Check for damage
+Done
diff --git a/tests/generic/334 b/tests/generic/334
new file mode 100755
index 0000000..a246711
--- /dev/null
+++ b/tests/generic/334
@@ -0,0 +1,104 @@
+#! /bin/bash
+# FS QA Test No. 334
+#
+# Test for races or FS corruption when trying to hit ENOSPC while DIO writing
+# to a file that's also the source of a reflink operation.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016 Oracle, Inc. 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 7 15
+
+_cleanup()
+{
+ cd /
+ rm -rf "$tmp".*
+ wait
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+
+echo "Format and mount"
+_scratch_mkfs_sized $((400 * 1048576)) > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+testdir="$SCRATCH_MNT/test-$seq"
+rm -rf "$testdir"
+mkdir "$testdir"
+
+loops=1024
+nr_loops=$((loops - 1))
+blksz=65536
+
+echo "Initialize file"
+echo > "$seqres.full"
+_pwrite_byte 0x61 0 $((loops * blksz)) "$testdir/file1" >> "$seqres.full"
+_scratch_remount
+
+# Snapshot creator...
+snappy() {
+ n=0
+ while [ ! -e "$testdir/finished" ]; do
+ out="$(_cp_reflink "$testdir/file1" "$testdir/snap_$n" 2>&1)"
+ res=$?
+ echo "$out" | grep -q "No space left" && break
+ test -n "$out" && echo "$out"
+ test $res -ne 0 && break
+ n=$((n + 1))
+ done
+ touch "$testdir/abort"
+}
+
+echo "Snapshot a file undergoing buffered rewrite"
+snappy &
+seq 1 1000 | while read i; do
+ seq $nr_loops -1 0 | while read i; do
+ out="$(_pwrite_byte 0x63 $((i * blksz)) $blksz "$testdir/file1" 2>&1)"
+ echo "$out" >> "$seqres.full"
+ echo "$out" | grep -q "No space left" && touch "$testdir/abort"
+ echo "$out" | grep -qi "error" && touch "$testdir/abort"
+ test -e "$testdir/abort" && break
+ done
+ test -e "$testdir/abort" && break
+done
+touch "$testdir/finished"
+wait
+
+echo "Check for damage"
+_scratch_unmount
+
+echo "Done"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/334.out b/tests/generic/334.out
new file mode 100644
index 0000000..c196ff1
--- /dev/null
+++ b/tests/generic/334.out
@@ -0,0 +1,6 @@
+QA output created by 334
+Format and mount
+Initialize file
+Snapshot a file undergoing buffered rewrite
+Check for damage
+Done
diff --git a/tests/generic/group b/tests/generic/group
index b5ae5ad..a23ffc9 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -335,3 +335,5 @@
330 auto quick clone
331 auto quick clone
332 auto quick clone
+333 auto quick clone
+334 auto quick clone