qemu-e2k/tests/qemu-iotests/085.out

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QA output created by 085
Formatting 'TEST_DIR/t.IMGFMT.1', fmt=IMGFMT size=134217728
Formatting 'TEST_DIR/t.IMGFMT.2', fmt=IMGFMT size=134217728
=== Running QEMU ===
=== Sending capabilities ===
{ 'execute': 'qmp_capabilities' }
{"return": {}}
=== Create a single snapshot on virtio0 ===
{ 'execute': 'blockdev-snapshot-sync',
'arguments': { 'device': 'virtio0',
'snapshot-file':'TEST_DIR/1-snapshot-v0.IMGFMT',
'format': 'IMGFMT' } }
Formatting 'TEST_DIR/1-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/t.qcow2.1 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
=== Invalid command - missing device and nodename ===
{ 'execute': 'blockdev-snapshot-sync',
'arguments': { 'snapshot-file':'TEST_DIR/1-snapshot-v0.IMGFMT',
'format': 'IMGFMT' } }
{"error": {"class": "GenericError", "desc": "Cannot find device='' nor node-name=''"}}
=== Invalid command - missing snapshot-file ===
{ 'execute': 'blockdev-snapshot-sync',
'arguments': { 'device': 'virtio0',
'format': 'IMGFMT' } }
{"error": {"class": "GenericError", "desc": "Parameter 'snapshot-file' is missing"}}
=== Create several transactional group snapshots ===
{ 'execute': 'transaction', 'arguments':
{'actions': [
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio0',
'snapshot-file': 'TEST_DIR/2-snapshot-v0.IMGFMT' } },
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio1',
'snapshot-file': 'TEST_DIR/2-snapshot-v1.IMGFMT' } } ]
} }
Formatting 'TEST_DIR/2-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/1-snapshot-v0.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Formatting 'TEST_DIR/2-snapshot-v1.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/t.qcow2.2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
{ 'execute': 'transaction', 'arguments':
{'actions': [
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio0',
'snapshot-file': 'TEST_DIR/3-snapshot-v0.IMGFMT' } },
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio1',
'snapshot-file': 'TEST_DIR/3-snapshot-v1.IMGFMT' } } ]
} }
Formatting 'TEST_DIR/3-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/2-snapshot-v0.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Formatting 'TEST_DIR/3-snapshot-v1.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/2-snapshot-v1.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
{ 'execute': 'transaction', 'arguments':
{'actions': [
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio0',
'snapshot-file': 'TEST_DIR/4-snapshot-v0.IMGFMT' } },
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio1',
'snapshot-file': 'TEST_DIR/4-snapshot-v1.IMGFMT' } } ]
} }
Formatting 'TEST_DIR/4-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/3-snapshot-v0.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Formatting 'TEST_DIR/4-snapshot-v1.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/3-snapshot-v1.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
{ 'execute': 'transaction', 'arguments':
{'actions': [
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio0',
'snapshot-file': 'TEST_DIR/5-snapshot-v0.IMGFMT' } },
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio1',
'snapshot-file': 'TEST_DIR/5-snapshot-v1.IMGFMT' } } ]
} }
Formatting 'TEST_DIR/5-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/4-snapshot-v0.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Formatting 'TEST_DIR/5-snapshot-v1.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/4-snapshot-v1.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
{ 'execute': 'transaction', 'arguments':
{'actions': [
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio0',
'snapshot-file': 'TEST_DIR/6-snapshot-v0.IMGFMT' } },
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio1',
'snapshot-file': 'TEST_DIR/6-snapshot-v1.IMGFMT' } } ]
} }
Formatting 'TEST_DIR/6-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/5-snapshot-v0.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Formatting 'TEST_DIR/6-snapshot-v1.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/5-snapshot-v1.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
{ 'execute': 'transaction', 'arguments':
{'actions': [
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio0',
'snapshot-file': 'TEST_DIR/7-snapshot-v0.IMGFMT' } },
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio1',
'snapshot-file': 'TEST_DIR/7-snapshot-v1.IMGFMT' } } ]
} }
Formatting 'TEST_DIR/7-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/6-snapshot-v0.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Formatting 'TEST_DIR/7-snapshot-v1.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/6-snapshot-v1.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
{ 'execute': 'transaction', 'arguments':
{'actions': [
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio0',
'snapshot-file': 'TEST_DIR/8-snapshot-v0.IMGFMT' } },
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio1',
'snapshot-file': 'TEST_DIR/8-snapshot-v1.IMGFMT' } } ]
} }
Formatting 'TEST_DIR/8-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/7-snapshot-v0.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Formatting 'TEST_DIR/8-snapshot-v1.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/7-snapshot-v1.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
{ 'execute': 'transaction', 'arguments':
{'actions': [
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio0',
'snapshot-file': 'TEST_DIR/9-snapshot-v0.IMGFMT' } },
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio1',
'snapshot-file': 'TEST_DIR/9-snapshot-v1.IMGFMT' } } ]
} }
Formatting 'TEST_DIR/9-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/8-snapshot-v0.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Formatting 'TEST_DIR/9-snapshot-v1.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/8-snapshot-v1.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
{ 'execute': 'transaction', 'arguments':
{'actions': [
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio0',
'snapshot-file': 'TEST_DIR/10-snapshot-v0.IMGFMT' } },
{ 'type': 'blockdev-snapshot-sync', 'data' :
{ 'device': 'virtio1',
'snapshot-file': 'TEST_DIR/10-snapshot-v1.IMGFMT' } } ]
} }
Formatting 'TEST_DIR/10-snapshot-v0.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/9-snapshot-v0.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Formatting 'TEST_DIR/10-snapshot-v1.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=134217728 backing_file=TEST_DIR/9-snapshot-v1.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
{"return": {}}
=== Create a couple of snapshots using blockdev-snapshot ===
iotests: Specify explicit backing format where sensible There are many existing qcow2 images that specify a backing file but no format. This has been the source of CVEs in the past, but has become more prominent of a problem now that libvirt has switched to -blockdev. With older -drive, at least the probing was always done by qemu (so the only risk of a changed format between successive boots of a guest was if qemu was upgraded and probed differently). But with newer -blockdev, libvirt must specify a format; if libvirt guesses raw where the image was formatted, this results in data corruption visible to the guest; conversely, if libvirt guesses qcow2 where qemu was using raw, this can result in potential security holes, so modern libvirt instead refuses to use images without explicit backing format. The change in libvirt to reject images without explicit backing format has pointed out that a number of tools have been far too reliant on probing in the past. It's time to set a better example in our own iotests of properly setting this parameter. iotest calls to create, rebase, and convert are all impacted to some degree. It's a bit annoying that we are inconsistent on command line - while all of those accept -o backing_file=...,backing_fmt=..., the shortcuts are different: create and rebase have -b and -F, while convert has -B but no -F. (amend has no shortcuts, but the previous patch just deprecated the use of amend to change backing chains). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-9-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-07-06 22:39:52 +02:00
Formatting 'TEST_DIR/11-snapshot-v0.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/10-snapshot-v0.IMGFMT backing_fmt=IMGFMT
{ 'execute': 'blockdev-add', 'arguments':
{ 'driver': 'IMGFMT', 'node-name': 'snap_11', 'backing': null,
'file':
{ 'driver': 'file', 'filename': 'TEST_DIR/11-snapshot-v0.IMGFMT',
'node-name': 'file_11' } } }
{"return": {}}
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node': 'virtio0',
'overlay':'snap_11' } }
{"return": {}}
iotests: Specify explicit backing format where sensible There are many existing qcow2 images that specify a backing file but no format. This has been the source of CVEs in the past, but has become more prominent of a problem now that libvirt has switched to -blockdev. With older -drive, at least the probing was always done by qemu (so the only risk of a changed format between successive boots of a guest was if qemu was upgraded and probed differently). But with newer -blockdev, libvirt must specify a format; if libvirt guesses raw where the image was formatted, this results in data corruption visible to the guest; conversely, if libvirt guesses qcow2 where qemu was using raw, this can result in potential security holes, so modern libvirt instead refuses to use images without explicit backing format. The change in libvirt to reject images without explicit backing format has pointed out that a number of tools have been far too reliant on probing in the past. It's time to set a better example in our own iotests of properly setting this parameter. iotest calls to create, rebase, and convert are all impacted to some degree. It's a bit annoying that we are inconsistent on command line - while all of those accept -o backing_file=...,backing_fmt=..., the shortcuts are different: create and rebase have -b and -F, while convert has -B but no -F. (amend has no shortcuts, but the previous patch just deprecated the use of amend to change backing chains). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-9-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-07-06 22:39:52 +02:00
Formatting 'TEST_DIR/12-snapshot-v0.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/11-snapshot-v0.IMGFMT backing_fmt=IMGFMT
{ 'execute': 'blockdev-add', 'arguments':
{ 'driver': 'IMGFMT', 'node-name': 'snap_12', 'backing': null,
'file':
{ 'driver': 'file', 'filename': 'TEST_DIR/12-snapshot-v0.IMGFMT',
'node-name': 'file_12' } } }
{"return": {}}
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node': 'virtio0',
'overlay':'snap_12' } }
{"return": {}}
=== Invalid command - cannot create a snapshot using a file BDS ===
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node':'virtio0',
'overlay':'file_12' }
}
block: Relax restrictions for blockdev-snapshot blockdev-snapshot returned an error if the overlay was already in use, which it defined as having any BlockBackend parent. This is in fact both too strict (some parents can tolerate the change of visible data caused by attaching a backing file) and too loose (some non-BlockBackend parents may not be happy with it). One important use case that is prevented by the too strict check is live storage migration with blockdev-mirror. Here, the target node is usually opened without a backing file so that the active layer is mirrored while its backing chain can be copied in the background. The backing chain should be attached to the mirror target node when finalising the job, just before switching the users of the source node to the new copy (at which point the mirror job still has a reference to the node). drive-mirror did this automatically, but with blockdev-mirror this is the job of the QMP client, so it needs a way to do this. blockdev-snapshot is the obvious way, so this patch makes it work in this scenario. The new condition is that no parent uses CONSISTENT_READ permissions. This will ensure that the operation will still be blocked when the node is attached to the guest device, so blockdev-snapshot remains safe. (For the sake of completeness, x-blockdev-reopen can be used to achieve the same, however it is a big hammer, performs the graph change completely unchecked and is still experimental. So even with the option of using x-blockdev-reopen, there are reasons why blockdev-snapshot should be able to perform this operation.) Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200310113831.27293-3-kwolf@redhat.com> Reviewed-by: Peter Krempa <pkrempa@redhat.com> Tested-by: Peter Krempa <pkrempa@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-03-10 12:38:26 +01:00
{"error": {"class": "GenericError", "desc": "The overlay is already in use"}}
=== Invalid command - snapshot node used as active layer ===
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node': 'virtio0',
'overlay':'snap_12' } }
{"error": {"class": "GenericError", "desc": "The overlay is already in use"}}
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node':'virtio0',
'overlay':'virtio0' }
}
{"error": {"class": "GenericError", "desc": "The overlay is already in use"}}
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node':'virtio0',
'overlay':'virtio1' }
}
{"error": {"class": "GenericError", "desc": "The overlay is already in use"}}
=== Invalid command - snapshot node used as backing hd ===
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node': 'virtio0',
'overlay':'snap_11' } }
block: Relax restrictions for blockdev-snapshot blockdev-snapshot returned an error if the overlay was already in use, which it defined as having any BlockBackend parent. This is in fact both too strict (some parents can tolerate the change of visible data caused by attaching a backing file) and too loose (some non-BlockBackend parents may not be happy with it). One important use case that is prevented by the too strict check is live storage migration with blockdev-mirror. Here, the target node is usually opened without a backing file so that the active layer is mirrored while its backing chain can be copied in the background. The backing chain should be attached to the mirror target node when finalising the job, just before switching the users of the source node to the new copy (at which point the mirror job still has a reference to the node). drive-mirror did this automatically, but with blockdev-mirror this is the job of the QMP client, so it needs a way to do this. blockdev-snapshot is the obvious way, so this patch makes it work in this scenario. The new condition is that no parent uses CONSISTENT_READ permissions. This will ensure that the operation will still be blocked when the node is attached to the guest device, so blockdev-snapshot remains safe. (For the sake of completeness, x-blockdev-reopen can be used to achieve the same, however it is a big hammer, performs the graph change completely unchecked and is still experimental. So even with the option of using x-blockdev-reopen, there are reasons why blockdev-snapshot should be able to perform this operation.) Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200310113831.27293-3-kwolf@redhat.com> Reviewed-by: Peter Krempa <pkrempa@redhat.com> Tested-by: Peter Krempa <pkrempa@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-03-10 12:38:26 +01:00
{"error": {"class": "GenericError", "desc": "The overlay is already in use"}}
=== Invalid command - snapshot node has a backing image ===
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
iotests: Specify explicit backing format where sensible There are many existing qcow2 images that specify a backing file but no format. This has been the source of CVEs in the past, but has become more prominent of a problem now that libvirt has switched to -blockdev. With older -drive, at least the probing was always done by qemu (so the only risk of a changed format between successive boots of a guest was if qemu was upgraded and probed differently). But with newer -blockdev, libvirt must specify a format; if libvirt guesses raw where the image was formatted, this results in data corruption visible to the guest; conversely, if libvirt guesses qcow2 where qemu was using raw, this can result in potential security holes, so modern libvirt instead refuses to use images without explicit backing format. The change in libvirt to reject images without explicit backing format has pointed out that a number of tools have been far too reliant on probing in the past. It's time to set a better example in our own iotests of properly setting this parameter. iotest calls to create, rebase, and convert are all impacted to some degree. It's a bit annoying that we are inconsistent on command line - while all of those accept -o backing_file=...,backing_fmt=..., the shortcuts are different: create and rebase have -b and -F, while convert has -B but no -F. (amend has no shortcuts, but the previous patch just deprecated the use of amend to change backing chains). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200706203954.341758-9-eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-07-06 22:39:52 +02:00
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
{ 'execute': 'blockdev-add', 'arguments':
{ 'driver': 'IMGFMT', 'node-name': 'snap_13',
'file':
{ 'driver': 'file', 'filename': 'TEST_DIR/t.IMGFMT',
'node-name': 'file_13' } } }
{"return": {}}
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node': 'virtio0',
'overlay':'snap_13' } }
{"error": {"class": "GenericError", "desc": "The overlay already has a backing image"}}
=== Invalid command - creating loops ===
Formatting 'TEST_DIR/14-snapshot-v0.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/13-snapshot-v0.IMGFMT backing_fmt=IMGFMT
{ 'execute': 'blockdev-add', 'arguments':
{ 'driver': 'IMGFMT', 'node-name': 'snap_14', 'backing': null,
'file':
{ 'driver': 'file', 'filename': 'TEST_DIR/14-snapshot-v0.IMGFMT',
'node-name': 'file_14' } } }
{"return": {}}
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node':'snap_14',
'overlay':'snap_14' }
}
{"error": {"class": "GenericError", "desc": "Making 'snap_14' a backing child of 'snap_14' would create a cycle"}}
Formatting 'TEST_DIR/15-snapshot-v0.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/14-snapshot-v0.IMGFMT backing_fmt=IMGFMT
{ 'execute': 'blockdev-add', 'arguments':
{ 'driver': 'IMGFMT', 'node-name': 'snap_15', 'backing': 'snap_14',
'file':
{ 'driver': 'file', 'filename': 'TEST_DIR/15-snapshot-v0.IMGFMT',
'node-name': 'file_15' } } }
{"return": {}}
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node':'snap_15',
'overlay':'snap_14' }
}
{"error": {"class": "GenericError", "desc": "Making 'snap_15' a backing child of 'snap_14' would create a cycle"}}
=== Invalid command - The node does not exist ===
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node': 'virtio0',
'overlay':'snap_16' } }
{"error": {"class": "GenericError", "desc": "Cannot find device='snap_16' nor node-name='snap_16'"}}
{ 'execute': 'blockdev-snapshot',
'arguments': { 'node':'nodevice',
'overlay':'snap_15' }
}
{"error": {"class": "GenericError", "desc": "Cannot find device='nodevice' nor node-name='nodevice'"}}
*** done