Patchwork [RFC,7/7] qemu-iotests: add 039 qcow2 lazy refcounts test

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Submitter Stefan Hajnoczi
Date June 22, 2012, 3:08 p.m.
Message ID <1340377726-5896-8-git-send-email-stefanha@linux.vnet.ibm.com>
Download mbox | patch
Permalink /patch/166637/
State New
Headers show

Comments

Stefan Hajnoczi - June 22, 2012, 3:08 p.m.
This tests establishes the basic post-conditions of the qcow2 lazy
refcounts features:

  1. If the image was closed normally, it is marked clean.

  2. If an allocating write was performed and the image was not close
     normally, then it is marked dirty.

     a. Written data can be read back successfully.
     b. The image file can be repaired and will be marked clean again.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
---
 tests/qemu-iotests/039     |   99 ++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/039.out |   34 +++++++++++++++
 tests/qemu-iotests/group   |    1 +
 3 files changed, 134 insertions(+)
 create mode 100755 tests/qemu-iotests/039
 create mode 100644 tests/qemu-iotests/039.out
Kevin Wolf - June 25, 2012, 3:10 p.m.
Am 22.06.2012 17:08, schrieb Stefan Hajnoczi:
> This tests establishes the basic post-conditions of the qcow2 lazy
> refcounts features:
> 
>   1. If the image was closed normally, it is marked clean.
> 
>   2. If an allocating write was performed and the image was not close
>      normally, then it is marked dirty.
> 
>      a. Written data can be read back successfully.
>      b. The image file can be repaired and will be marked clean again.
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
> ---
>  tests/qemu-iotests/039     |   99 ++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/039.out |   34 +++++++++++++++
>  tests/qemu-iotests/group   |    1 +
>  3 files changed, 134 insertions(+)
>  create mode 100755 tests/qemu-iotests/039
>  create mode 100644 tests/qemu-iotests/039.out
> 
> diff --git a/tests/qemu-iotests/039 b/tests/qemu-iotests/039
> new file mode 100755
> index 0000000..f4f9347
> --- /dev/null
> +++ b/tests/qemu-iotests/039
> @@ -0,0 +1,99 @@
> +#!/bin/bash
> +#
> +# Test qcow2 lazy refcounts
> +#
> +# Copyright (C) 2012 Red Hat, Inc.
> +# Copyright IBM, Corp. 2010
> +#
> +# Based on test 038.
> +#
> +# 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; either version 2 of the License, or
> +# (at your option) any later version.
> +#
> +# This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>.
> +#
> +
> +# creator
> +owner=stefanha@linux.vnet.ibm.com
> +
> +seq=`basename $0`
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1	# failure is the default!
> +
> +_cleanup()
> +{
> +	_cleanup_test_img
> +}
> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +# get standard environment, filters and checks
> +. ./common.rc
> +. ./common.filter
> +
> +_supported_fmt qcow2
> +_supported_proto generic
> +_supported_os Linux
> +
> +size=128M
> +
> +echo
> +echo "== Checking that image is clean on shutdown =="
> +
> +IMGOPTS="compat=1.1,lazy_refcounts=on"
> +_make_test_img $size
> +
> +$QEMU_IO -c "write -P 0x5a 0 512" $TEST_IMG | _filter_qemu_io
> +
> +# The dirty bit must not be set
> +./qcow2.py $TEST_IMG dump-header | grep incompatible_features
> +_check_test_img
> +
> +echo
> +echo "== Creating a dirty image file =="
> +
> +IMGOPTS="compat=1.1,lazy_refcounts=on"
> +_make_test_img $size
> +
> +old_ulimit=$(ulimit -c)
> +ulimit -c 0 # do not produce a core dump on abort(3)
> +$QEMU_IO -c "write -P 0x5a 0 512" -c "abort" $TEST_IMG | _filter_qemu_io
> +ulimit -c "$old_ulimit"
> +
> +# The dirty bit must be set
> +./qcow2.py $TEST_IMG dump-header | grep incompatible_features
> +_check_test_img
> +
> +echo
> +echo "== Read-only access must still work =="
> +
> +$QEMU_IO -r -c "read -P 0x5a 0 512" $TEST_IMG | _filter_qemu_io

I would add a check here that the dirty bit is still set.

Maybe also add a test that the dirty flag is never set with
lazy_refcounts=off.

Kevin
Stefan Hajnoczi - June 25, 2012, 3:55 p.m.
On Mon, Jun 25, 2012 at 4:10 PM, Kevin Wolf <kwolf@redhat.com> wrote:
> Am 22.06.2012 17:08, schrieb Stefan Hajnoczi:
>> +echo
>> +echo "== Read-only access must still work =="
>> +
>> +$QEMU_IO -r -c "read -P 0x5a 0 512" $TEST_IMG | _filter_qemu_io
>
> I would add a check here that the dirty bit is still set.
>
> Maybe also add a test that the dirty flag is never set with
> lazy_refcounts=off.

Okay, will add.

Stefan

Patch

diff --git a/tests/qemu-iotests/039 b/tests/qemu-iotests/039
new file mode 100755
index 0000000..f4f9347
--- /dev/null
+++ b/tests/qemu-iotests/039
@@ -0,0 +1,99 @@ 
+#!/bin/bash
+#
+# Test qcow2 lazy refcounts
+#
+# Copyright (C) 2012 Red Hat, Inc.
+# Copyright IBM, Corp. 2010
+#
+# Based on test 038.
+#
+# 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; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=stefanha@linux.vnet.ibm.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+
+_cleanup()
+{
+	_cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+_supported_fmt qcow2
+_supported_proto generic
+_supported_os Linux
+
+size=128M
+
+echo
+echo "== Checking that image is clean on shutdown =="
+
+IMGOPTS="compat=1.1,lazy_refcounts=on"
+_make_test_img $size
+
+$QEMU_IO -c "write -P 0x5a 0 512" $TEST_IMG | _filter_qemu_io
+
+# The dirty bit must not be set
+./qcow2.py $TEST_IMG dump-header | grep incompatible_features
+_check_test_img
+
+echo
+echo "== Creating a dirty image file =="
+
+IMGOPTS="compat=1.1,lazy_refcounts=on"
+_make_test_img $size
+
+old_ulimit=$(ulimit -c)
+ulimit -c 0 # do not produce a core dump on abort(3)
+$QEMU_IO -c "write -P 0x5a 0 512" -c "abort" $TEST_IMG | _filter_qemu_io
+ulimit -c "$old_ulimit"
+
+# The dirty bit must be set
+./qcow2.py $TEST_IMG dump-header | grep incompatible_features
+_check_test_img
+
+echo
+echo "== Read-only access must still work =="
+
+$QEMU_IO -r -c "read -P 0x5a 0 512" $TEST_IMG | _filter_qemu_io
+
+echo
+echo "== Repairing the image file must succeed =="
+
+$QEMU_IMG check -r all $TEST_IMG
+
+# The dirty bit must not be set
+./qcow2.py $TEST_IMG dump-header | grep incompatible_features
+
+echo
+echo "== Data should still be accessible after repair =="
+
+$QEMU_IO -c "read -P 0x5a 0 512" $TEST_IMG | _filter_qemu_io
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
+
diff --git a/tests/qemu-iotests/039.out b/tests/qemu-iotests/039.out
new file mode 100644
index 0000000..9a23181
--- /dev/null
+++ b/tests/qemu-iotests/039.out
@@ -0,0 +1,34 @@ 
+QA output created by 039
+
+== Checking that image is clean on shutdown ==
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 lazy_refcounts=on 
+wrote 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+incompatible_features     0x0
+No errors were found on the image.
+
+== Creating a dirty image file ==
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 lazy_refcounts=on 
+wrote 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+incompatible_features     0x1
+ERROR OFLAG_COPIED: offset=8000000000050000 refcount=0
+ERROR cluster 5 refcount=0 reference=1
+
+2 errors were found on the image.
+Data may be corrupted, or further writes to the image may corrupt it.
+
+== Read-only access must still work ==
+read 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+== Repairing the image file must succeed ==
+ERROR OFLAG_COPIED: offset=8000000000050000 refcount=0
+Repairing cluster 5 refcount=0 reference=1
+No errors were found on the image.
+incompatible_features     0x0
+
+== Data should still be accessible after repair ==
+read 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+*** done
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index 7a2c92b..ebb5ca4 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -45,3 +45,4 @@ 
 036 rw auto quick
 037 rw auto backing
 038 rw auto backing
+039 rw auto