Unfortunately, old guest OSes do not align partitions to page size by
default. This is true for Windows 2003 and Windows XP.
"Padding" is a value which should be added to guest LBA to obtain
sector number inside the image. This results in a shifted images.
0123 offset inside image (in 512 byte sectors)
+-------
+.012 guest data (512 byte sectors)
+-------
The information about this is available in DiskDescriptor.xml ONLY. There
is no such data in the image header.
This patch contains very simple image with padding and corresponding
XML disk descriptor created in authentic way.
Signed-off-by: Denis V. Lunev <d...@openvz.org>
Acked-by: Roman Kagan <rka...@parallels.com>
Reviewed-by: Jeff Cody <jc...@redhat.com>
CC: Kevin Wolf <kw...@redhat.com>
CC: Stefan Hajnoczi <stefa...@redhat.com>
---
tests/qemu-iotests/076 | 6 ++++++
tests/qemu-iotests/076.out | 4 ++++
tests/qemu-iotests/sample_images/parallels-padded.xml.bz2 | Bin 0 -> 377 bytes
tests/qemu-iotests/sample_images/parallels-v2-padded.bz2 | Bin 0 -> 139 bytes
4 files changed, 10 insertions(+)
create mode 100644 tests/qemu-iotests/sample_images/parallels-padded.xml.bz2
create mode 100644 tests/qemu-iotests/sample_images/parallels-v2-padded.bz2
diff --git a/tests/qemu-iotests/076 b/tests/qemu-iotests/076
index 636fc58..766b359 100755
--- a/tests/qemu-iotests/076
+++ b/tests/qemu-iotests/076
@@ -81,6 +81,12 @@ _use_sample_img parallels-v2.bz2
_use_sample_img parallels-simple.xml.bz2
{ $QEMU_IO -c "read -P 0x11 0 64k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io |
_filter_testdir
+echo
+echo "== Read from a valid v2 image opened through xml with padding =="
+_use_sample_img parallels-v2-padded.bz2
+_use_sample_img parallels-padded.xml.bz2
+{ $QEMU_IO -c "read -P 0x11 0 64k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io |
_filter_testdir
+
# success, all done
echo "*** done"
rm -f $seq.full
diff --git a/tests/qemu-iotests/076.out b/tests/qemu-iotests/076.out
index 628d9bf..46680d8 100644
--- a/tests/qemu-iotests/076.out
+++ b/tests/qemu-iotests/076.out
@@ -23,4 +23,8 @@ read 65536/65536 bytes at offset 0
== Read from a valid v2 image opened through xml ==
read 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+== Read from a valid v2 image opened through xml with padding ==
+read 65536/65536 bytes at offset 0
+64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
*** done
diff --git a/tests/qemu-iotests/sample_images/parallels-padded.xml.bz2
b/tests/qemu-iotests/sample_images/parallels-padded.xml.bz2
new file mode 100644
index
0000000000000000000000000000000000000000..90e481b88e1f4d65256d0511a8509114c6358052
GIT binary patch
literal 377
zcmV-<0fzoUT4*^jL0KkKS+JP`&Hw<KUw~9lPy_$xpWsdazwh08FaddH8X6Fz^phqa
z0kr@C000`P{z){A0000Upa9SS5-9{U$c>4nhyVtdfq>MRN`P%Vs7e5mydg1cvP<`s
zYo%7Ss&>_C5i%-bDqP)#HmEBiP+TU)8WyoiurHMw!l_ZF1>8_3m3N^^QwEd8=8hkN
zLO3;VtVoT0C3B518KN#oIV4@)7DfOSbkchYBQVO$9`K;#(G?m(FfikRxR&q(!eB`z
zPfQaAWzYbTAj%3PZH#S=y<l!A7-v`x<>0Cm|7Ih97TD6vNg%Klm)F8;i7;OxS)eka
zB8A?w-Lb<P2oQ=RX}Frn6(&gA)fHtcO2o1qAWlwhDKQig<sdQwI23XvR~T0E)#6G<
zUDR|Oi30I4$}VPcTnCQ(CKJjW0g+;mFwDaQlohzp(E|mg47s2j;G&NR^b?hm3@s%x
XY}H|5IAssg=l(9_ig2MJVKN1r8+(|=
literal 0
HcmV?d00001
diff --git a/tests/qemu-iotests/sample_images/parallels-v2-padded.bz2
b/tests/qemu-iotests/sample_images/parallels-v2-padded.bz2
new file mode 100644
index
0000000000000000000000000000000000000000..80948ce689e2c5c2335d6e6b36965fe0b2305613
GIT binary patch
literal 139
zcmV;60CfLCT4*^jL0KkKSt&WeumB1p|H%DFU;t162mk{B2!JYJ)<8f2AOHXuAOMPl
zQl^8-X^;SIHmDUv6HN?Ehp1#2<6B`Us=32n6t4O~g)zWI0C`4`x5NN3Kna)uT+{)Q
t08GFDLI4D2paA;U<m>wRX=_?<Gd@%RJirP-3P26T+>uTcBnnP&Yyj78F)siB
literal 0
HcmV?d00001
--
1.9.1
