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Kevin Wolf e4603fe139 qcow2: Fix header update with overridden backing file 
In recent qemu versions, it is possible to override the backing file
name and format that is stored in the image file with values given at
runtime. In such cases, the temporary override could end up in the
image header if the qcow2 header was updated, while obviously correct
behaviour would be to leave the on-disk backing file path/format
unchanged.

Fix this and add a test case for it.

Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1428411796-2852-1-git-send-email-kwolf@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-04-08 10:29:20 +01:00
..
sample_images
qemu-iotests: Test writing non-raw image headers to raw image
2014-12-10 10:31:13 +01:00
.gitignore
gitignore: Track common.env in iotests gitignore
2015-03-10 08:15:34 +03:00
001
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001.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
002
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002.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
003
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003.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
004
iotests: Drop vpc from 004's and 104's format list
2015-03-10 14:02:24 +01:00
004.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
005
…
005.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
007
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
007.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
008
…
008.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
009
…
009.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
010
…
010.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
011
…
011.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
012
…
012.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
013
…
013.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
014
…
014.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
015
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
015.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
017
…
017.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
018
…
018.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
019
…
019.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
020
…
020.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
021
…
021.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
022
…
022.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
023
…
023.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
024
…
024.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
025
qemu-iotests: Run 025 for Archipelago block driver
2014-09-10 10:41:29 +02:00
025.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
026
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
026.out
blkdebug: fix "once" rule
2015-03-10 14:02:21 +01:00
026.out.nocache
…
027
…
027.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
028
…
028.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
029
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
029.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
030
qemu-iotests: Add qemu-io format option in Python tests
2014-12-10 10:31:12 +01:00
030.out
…
031
…
031.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
032
…
032.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
033
qemu-iotests: Test unaligned 4k zero write
2015-03-27 10:01:12 +00:00
033.out
qemu-iotests: Test unaligned 4k zero write
2015-03-27 10:01:12 +00:00
034
…
034.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
035
…
035.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
036
…
036.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
037
…
037.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
038
…
038.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
039
iotests: Fix test 039
2014-12-12 15:48:26 +00:00
039.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
040
qemu-iotests: Add qemu-io format option in Python tests
2014-12-10 10:31:12 +01:00
040.out
…
041
iotests: Omit length/offset test in 040 and 041
2014-11-03 11:41:48 +00:00
041.out
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042
…
042.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
043
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043.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
044
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044.out
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045
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045.out
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046
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046.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
047
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047.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
048
qemu-iotests: Use qemu-io -f $IMGFMT
2014-12-10 10:31:12 +01:00
048.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
049
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049.out
block: Deprecate QCOW/QCOW2 encryption
2015-03-16 17:07:25 +01:00
050
…
050.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
051
Add testcase for scsi-hd devices without drive property
2015-03-10 14:02:24 +01:00
051.out
iotests: Update 051's reference output
2015-03-16 17:07:25 +01:00
052
qemu-iotests: Fix supported cache modes for 052
2014-10-03 10:30:33 +01:00
052.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
053
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053.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
054
…
054.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
055
block: Fix blockdev-backup not to use funky error class
2015-03-19 16:02:59 +01:00
055.out
qemu-iotests: Test blockdev-backup in 055
2015-01-13 11:47:56 +00:00
056
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056.out
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057
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057.out
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058
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
058.out
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059
iotests: Add test for vmdk JSON file names
2014-12-12 13:14:10 +00:00
059.out
iotests: Add test for vmdk JSON file names
2014-12-12 13:14:10 +00:00
060
iotests: Add tests for more corruption cases
2015-01-23 18:17:05 +01:00
060.out
qcow2: Add refcount_bits to format-specific info
2015-03-10 14:02:20 +01:00
061
iotests: Expand test 061
2014-11-03 11:41:49 +00:00
061.out
qemu-img: Fix convert, amend error messages for unknown options
2015-03-16 17:07:25 +01:00
062
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062.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
063
…
063.out
…
064
iotests: Lower 064's memory usage
2015-01-23 12:41:32 -05:00
064.out
iotests: Lower 064's memory usage
2015-01-23 12:41:32 -05:00
065
qcow2: Add refcount_bits to format-specific info
2015-03-10 14:02:20 +01:00
065.out
…
066
…
066.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
067
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
067.out
qcow2: Add refcount_bits to format-specific info
2015-03-10 14:02:20 +01:00
068
…
068.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
069
block: delete cow block driver
2014-09-22 11:39:45 +01:00
069.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
070
iotests: Use _img_info
2014-10-04 19:18:17 +01:00
070.out
iotests: Use _img_info
2014-10-04 19:18:17 +01:00
071
iotests: Filter out "I/O thread spun..." warning
2015-01-13 11:47:56 +00:00
071.out
iotests: Filter out "I/O thread spun..." warning
2015-01-13 11:47:56 +00:00
072
block: delete cow block driver
2014-09-22 11:39:45 +01:00
072.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
073
…
073.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
074
…
074.out
…
075
block: qemu-iotests change _supported_proto to file once more.
2014-10-23 15:34:01 +02:00
075.out
…
076
iotests: add v2 parallels sample image and simple test for it
2014-11-03 09:48:41 +00:00
076.out
iotests: add v2 parallels sample image and simple test for it
2014-11-03 09:48:41 +00:00
077
qemu-iotests: Use qemu-io -f $IMGFMT
2014-12-10 10:31:12 +01:00
077.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
078
block: qemu-iotests change _supported_proto to file once more.
2014-10-23 15:34:01 +02:00
078.out
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079
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
079.out
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
080
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
080.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
081
iotests: Filter out "I/O thread spun..." warning
2015-01-13 11:47:56 +00:00
081.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
082
qemu-iotests: 082: Filter the real disk size
2014-12-10 10:31:16 +01:00
082.out
qcow2: Allow creation with refcount order != 4
2015-03-10 14:02:21 +01:00
083
nbd: Improve error messages
2015-02-06 17:24:22 +01:00
083.out
nbd: Improve error messages
2015-02-06 17:24:22 +01:00
084
block/vdi: Limit maximum size even futher
2014-11-09 23:39:50 +01:00
084.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
085
…
085.out
qcow2: Allow creation with refcount order != 4
2015-03-10 14:02:21 +01:00
086
block: qemu-iotests change _supported_proto to file once more.
2014-10-23 15:34:01 +02:00
086.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
087
iotests: Filter out "I/O thread spun..." warning
2015-01-13 11:47:56 +00:00
087.out
block: Deprecate QCOW/QCOW2 encryption
2015-03-16 17:07:25 +01:00
088
block: qemu-iotests change _supported_proto to file once more.
2014-10-23 15:34:01 +02:00
088.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
089
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
089.out
qcow2: Add refcount_bits to format-specific info
2015-03-10 14:02:20 +01:00
090
block: qemu-iotests change _supported_proto to file once more.
2014-10-23 15:34:01 +02:00
090.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
091
…
091.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
092
block: qemu-iotests change _supported_proto to file once more.
2014-10-23 15:34:01 +02:00
092.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
093
qemu-iotests: Add 093 for IO throttling
2015-02-16 15:07:18 +00:00
093.out
qemu-iotests: Add 093 for IO throttling
2015-02-16 15:07:18 +00:00
094
iotests: Add test for drive-mirror with NBD target
2015-02-16 14:36:03 +00:00
094.out
iotests: Add test for drive-mirror with NBD target
2015-02-16 14:36:03 +00:00
095
iotests: Use _img_info
2014-10-04 19:18:17 +01:00
095.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
097
iotests: Add test for backing-chain commits
2014-11-03 11:41:48 +00:00
097.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
098
iotests: Add test for qcow2's bdrv_make_empty
2014-11-03 11:41:48 +00:00
098.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
099
iotests: Filter out "I/O thread spun..." warning
2015-01-13 11:47:56 +00:00
099.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
100
iotests: Fix 100 for nbd
2015-02-06 17:24:22 +01:00
100.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
101
…
101.out
…
102
iotests: Add test for external image truncation
2014-11-03 11:41:47 +00:00
102.out
iotests: Add test for external image truncation
2014-11-03 11:41:47 +00:00
103
block: qemu-iotests change _supported_proto to file once more.
2014-10-23 15:34:01 +02:00
103.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
104
iotests: Drop vpc from 004's and 104's format list
2015-03-10 14:02:24 +01:00
104.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
105
vmdk: Fix integer overflow in offset calculation
2014-10-03 10:30:33 +01:00
105.out
vmdk: Fix integer overflow in offset calculation
2014-10-03 10:30:33 +01:00
107
block: qemu-iotest 107 supports NFS
2014-11-03 11:41:48 +00:00
107.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
108
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
108.out
qemu-iotests: Remove traling whitespaces in *.out
2014-12-12 16:52:33 +00:00
109
qemu-iotests: Test writing non-raw image headers to raw image
2014-12-10 10:31:13 +01:00
109.out
qemu-iotests: Test writing non-raw image headers to raw image
2014-12-10 10:31:13 +01:00
110
iotests: Add test for relative backing file names
2015-01-13 11:47:56 +00:00
110.out
iotests: Add test for relative backing file names
2015-01-13 11:47:56 +00:00
111
iotests: Add test for non-existing backing file
2014-11-06 12:45:47 +01:00
111.out
iotests: Add test for non-existing backing file
2014-11-06 12:45:47 +01:00
112
iotests: Add test for different refcount widths
2015-03-10 14:02:21 +01:00
112.out
iotests: Add test for different refcount widths
2015-03-10 14:02:21 +01:00
113
iotests: Add test for unsupported image creation
2014-12-10 10:31:20 +01:00
113.out
iotests: Add test for unsupported image creation
2014-12-10 10:31:20 +01:00
114
block: Don't probe for unknown backing file format
2014-12-10 10:31:13 +01:00
114.out
block: Don't probe for unknown backing file format
2014-12-10 10:31:13 +01:00
115
iotests: Test non-self-referential qcow2 refblocks
2015-03-16 12:10:30 -04:00
115.out
iotests: Test non-self-referential qcow2 refblocks
2015-03-16 12:10:30 -04:00
116
qemu-iotests: add 116 invalid QED input file tests
2015-02-06 17:24:21 +01:00
116.out
qemu-iotests: add 116 invalid QED input file tests
2015-02-06 17:24:21 +01:00
121
iotests: Add tests for refcount table growth
2015-03-16 12:10:30 -04:00
121.out
iotests: Add tests for refcount table growth
2015-03-16 12:10:30 -04:00
123
iotests: Add test for qemu-img convert to NBD
2015-02-16 15:07:18 +00:00
123.out
iotests: Add test for qemu-img convert to NBD
2015-02-16 15:07:18 +00:00
128
iotests: add O_DIRECT alignment probing test
2015-03-10 14:02:24 +01:00
128.out
iotests: add O_DIRECT alignment probing test
2015-03-10 14:02:24 +01:00
130
qcow2: Fix header update with overridden backing file
2015-04-08 10:29:20 +01:00
130.out
qcow2: Fix header update with overridden backing file
2015-04-08 10:29:20 +01:00
check
qemu-iotests: Speed up make check-block
2015-01-13 11:47:55 +00:00
common
qemu-iotests: Use qemu-io -f $IMGFMT
2014-12-10 10:31:12 +01:00
common.config
qemu-iotests: Replace "/bin/true" with "true"
2015-01-13 13:43:28 +00:00
common.filter
iotests: Prepare for refcount_bits option
2015-03-10 14:02:21 +01:00
common.pattern
…
common.qemu
iotests: Add "wait" functionality to _cleanup_qemu
2015-02-16 14:36:03 +00:00
common.rc
iotests: Specify format for qemu-nbd
2015-02-06 17:24:21 +01:00
COPYING
…
group
qcow2: Fix header update with overridden backing file
2015-04-08 10:29:20 +01:00
iotests.py
qemu-iotests: Allow caller to disable underscore convertion for qmp
2015-02-16 15:07:18 +00:00
Makefile
…
nbd-fault-injector.py
…
qcow2.py
qcow2.py: Add required padding for header extensions
2014-12-10 10:31:13 +01:00
qed.py
…
README
…
socket_scm_helper.c
iotests: Send the correct fd in socket_scm_helper
2014-09-12 10:27:54 +02:00

README 

=== This is the QEMU I/O test suite ===

* Intro

This package contains a simple test suite for the I/O layer of qemu.
It does not require a guest, but only the qemu, qemu-img and qemu-io
binaries.  This does limit it to exercise the low-level I/O path only
but no actual block drivers like ide, scsi or virtio.

* Usage

Just run ./check to run all tests for the raw image format, or ./check
-qcow2 to test the qcow2 image format.  The output of ./check -h explains
additional options to test further image formats or I/O methods.

* Feedback and patches

Please send improvements to the test suite, general feedback or just
reports of failing tests cases to qemu-devel@savannah.nongnu.org.