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2021-02-08Acceptance tests: clarify ssh connection failure reasonCleber Rosa2-2/+2
If the connection to the ssh server fails, it may indeed be a "sshd" issue, but it may also not be that. Let's state what we know: the establishment of the connection from the client side was not possible. Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210203172357.1422425-13-crosa@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance/virtiofs_submounts: required space between IP and portCleber Rosa1-1/+1
AFAICT, there should not be a situation where IP and port do not have at least one whitespace character separating them. This may be true for other '\s*' patterns in the same regex too. Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210203172357.1422425-10-crosa@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance/virtiofs_submounts: standardize port as integerCleber Rosa1-3/+4
Instead of having to cast it whenever it's going to be used, let's standardize it as an integer, which is the data type that will be used most often. Given that the regex will only match digits, it's safe that we'll end up getting a integer, but, it could as well be a zero. Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Beraldo Leal <bleal@redhat.com> Message-Id: <20210203172357.1422425-9-crosa@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance/virtiofs_submounts: use a virtio-net device insteadCleber Rosa1-1/+1
In a virtiofs based tests, it seems safe to assume that the guest will be capable of a virtio-net device. Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210203172357.1422425-7-crosa@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance/virtiofs_submounts: do not ask for ssh key passwordCleber Rosa1-1/+1
Tests are supposed to be non-interactive, and ssh-keygen is asking for a passphrase when creating a key. Let's set an empty passphrase to avoid the prompt. Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Beraldo Leal <bleal@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210203172357.1422425-6-crosa@redhat.com> [PMD: Reword description per Alex Bennée comment] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance/virtiofs_submounts: use workdir propertyCleber Rosa1-4/+2
For Avocado Instrumented based tests, it's a better idea to just use the property. The environment variable is a fall back for tests not written using that Python API. Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Beraldo Leal <bleal@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reference: https://avocado-framework.readthedocs.io/en/84.0/api/test/avocado.html#avocado.Test.workdir Message-Id: <20210203172357.1422425-5-crosa@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance/boot_linux: rename misleading cloudinit methodCleber Rosa1-6/+6
There's no downloading happening on that method, so let's call it "prepare" instead. While at it, and because of it, the current "prepare_boot" and "prepare_cloudinit" are also renamed. The reasoning here is that "prepare_" methods will just work on the images, while "set_up_" will make them effective to the VM that will be launched. Inspiration comes from the "virtiofs_submounts.py" tests, which this expects to converge more into. Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Beraldo Leal <bleal@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210203172357.1422425-3-crosa@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance/boot_linux: fix typo on cloudinit error messageCleber Rosa1-1/+1
Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Beraldo Leal <bleal@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210203172357.1422425-2-crosa@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance: Re-enable the microblaze testThomas Huth3-9/+36
The microblaze kernel sometimes gets stuck during boot (ca. 1 out of 200 times), so we disabled the corresponding acceptance tests some months ago. However, it's likely better to check that the kernel is still starting than to not testing it at all anymore. Move the test to a separate file, enable it again and check for an earlier console message that should always appear. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Message-Id: <20210128152815.585478-1-thuth@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08qapi: enable strict-optional checksJohn Snow1-1/+0
In the modules that we are checking so far, we can be stricter about the difference between Optional[T] and T types. Enable that check. Enabling it now will assist review on further typing and cleanup work. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-17-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi: type 'info' as Optional[QAPISourceInfo]John Snow5-6/+6
For everything typed so far, type this parameter as Optional[QAPISourceInfo]. In the most generic case, QAPISchemaEntity's info field may be None to represent types that come from built-in definitions. Although some Entity types may not currently have any built-in definitions, it is not easily possible to constrain the type except on an ad-hoc basis using assertions. It's easier and simpler, then, to just say it's always an Optional type. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-16-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi/gen: Drop support for QAPIGen without a file nameMarkus Armbruster1-2/+2
The previous commit removed the only user of QAPIGen(None). Tighten the type hint. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-15-jsnow@redhat.com>
2021-02-08qapi/commands: Simplify command registry generationMarkus Armbruster1-27/+22
QAPISchemaGenCommandVisitor.visit_command() needs to generate the marshalling function into the current module, and also generate its registration into the ./init system module. The latter is done somewhat awkwardly: .__init__() creates a QAPIGenCCode that will not be written out, each .visit_command() adds its registration to it, and .visit_end() copies its contents into the ./init module it creates. Instead provide the means to temporarily switch to another module. Create the ./init module in .visit_begin(), and generate its initial part. Add registrations to it in .visit_command(). Finish it in .visit_end(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-14-jsnow@redhat.com>
2021-02-08qapi/gen: Support switching to another module temporarilyMarkus Armbruster1-0/+7
Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-13-jsnow@redhat.com> [Commit message tweaked]
2021-02-08qapi/gen: write _genc/_genh access shimsJohn Snow1-5/+13
Many places assume they can access these fields without checking them first to ensure they are defined. Eliminating the _genc and _genh fields and replacing them with functional properties that check for correct state can ease the typing overhead by eliminating the Optional[T] return type. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-12-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi: centralize the built-in module name definitionJohn Snow1-5/+8
Use a constant to make it obvious we're referring to a very specific thing. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-11-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi/gen: Combine ._add_[user|system]_moduleMarkus Armbruster3-14/+7
With callers to _add_system_module now explicitly using the './' prefix to indicate a system module, there is no longer any reason to have separate interfaces for adding system vs user modules; use a unified interface that differentiates based on the name. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-10-jsnow@redhat.com>
2021-02-08qapi: use './builtin' as the built-in module nameJohn Snow10-27/+27
Use './builtin' as the built-in module name instead of None. Clarify the typing that this is now always a string. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-9-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi: use explicitly internal module namesJohn Snow3-3/+4
QAPISchemaModularCVisitor._add_system_module() prefixes './' to its name argument to make it a module name. Pass the module name instead. This will allow us to coalesce the methods to add modules later on. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-8-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Commit message reworded] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi/gen: Replace ._begin_system_module()Markus Armbruster3-6/+7
QAPISchemaModularCVisitor._begin_system_module() is actually just for the builtin module. Rename it to ._begin_builtin_module() and drop its useless @name parameter. Clarify conditionals in visit_module to make this clear. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-7-jsnow@redhat.com>
2021-02-08qapi: centralize is_[user|system|builtin]_module methodsJohn Snow2-16/+40
Define what a module is and define what kind of a module it is once and for all, in one place. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-6-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi/gen: inline _wrap_ifcond into end_if()John Snow1-5/+2
We assert _start_if is not None in end_if, but that's opaque to mypy. By inlining _wrap_ifcond, that constraint becomes provable to mypy. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-5-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi/main: handle theoretical None-return from re.match()John Snow1-0/+2
Mypy cannot understand that this match can never be None, so help it along. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-4-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi/events: fix visit_event typingJohn Snow1-5/+7
Actually, the arg_type can indeed be Optional. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-3-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08qapi/commands: assert arg_type is not NoneJohn Snow1-3/+6
When boxed is True, expr.py asserts that we must have arguments. Ultimately, this should mean that if boxed is True that arg_type should be defined. Mypy cannot infer this, and does not support 'stateful' type inference, e.g.: ``` if x: assert y is not None ... if x: y.etc() ``` does not work, because mypy does not statefully remember the conditional assertion in the second block. Help mypy out by creating a new local that it can track more easily. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-2-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-02-08tests/acceptance: Add a test for the virtex-ml507 ppc machineThomas Huth1-0/+18
The "And a hippo new year" image from the QEMU advent calendar 2020 can be used to test the virtex-ml507 ppc machine. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Willian Rampazzo <willianr@redhat.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Message-Id: <20210112164045.98565-4-thuth@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance: Test the mpc8544ds machineThomas Huth1-0/+17
We can use the "Stupid creek" image to test the mpc8544ds ppc machine. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Willian Rampazzo <willianr@redhat.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Message-Id: <20210112164045.98565-3-thuth@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance: Move the pseries test to a separate fileThomas Huth3-19/+35
Let's gather the POWER-related tests in a separate file. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Willian Rampazzo <willianr@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Message-Id: <20210112164045.98565-2-thuth@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance: Test U-Boot/Linux from Armbian 20.08 on Orange Pi PCPhilippe Mathieu-Daudé1-0/+25
Test U-Boot and Linux on the recent Armbian release 20.08. Suggested-by: Cleber Rosa <crosa@redhat.com> Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com> Tested-by: Bin Meng <bin.meng@windriver.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20201023131808.3198005-5-f4bug@amsat.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance: Extract do_test_arm_orangepi_armbian_uboot() methodPhilippe Mathieu-Daudé1-21/+24
As we want to reuse the same U-Boot test for multiple Armbian releases, extract the common part as do_test_arm_orangepi_armbian_uboot(). Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Bin Meng <bin.meng@windriver.com> Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com> Message-Id: <20201023131808.3198005-4-f4bug@amsat.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance: Introduce tesseract_ocr() helperPhilippe Mathieu-Daudé2-16/+23
We are going to reuse the tesseract OCR code. Create a new tesseract_ocr() helper and use it. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20201021105035.2477784-5-f4bug@amsat.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08tests/acceptance: Extract tesseract_available() helper in new namespacePhilippe Mathieu-Daudé2-22/+31
We are going to reuse tesseract_available(). Extract it to a new 'tesseract_utils' namespace. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20201021105035.2477784-4-f4bug@amsat.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-02-08migration: only check page size match if RAM postcopy is enabledStefan Reiter1-1/+1
Postcopy may also be advised for dirty-bitmap migration only, in which case the remote page size will not be available and we'll instead read bogus data, blocking migration with a mismatch error if the VM uses hugepages. Fixes: 58110f0acb ("migration: split common postcopy out of ram postcopy") Signed-off-by: Stefan Reiter <s.reiter@proxmox.com> Message-Id: <20210204163522.13291-1-s.reiter@proxmox.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: introduce snapshot-{save, load, delete} QMP commandsDaniel P. Berrangé3-1/+365
savevm, loadvm and delvm are some of the few HMP commands that have never been converted to use QMP. The reasons for the lack of conversion are that they blocked execution of the event thread, and the semantics around choice of disks were ill-defined. Despite this downside, however, libvirt and applications using libvirt have used these commands for as long as QMP has existed, via the "human-monitor-command" passthrough command. IOW, while it is clearly desirable to be able to fix the problems, they are not a blocker to all real world usage. Meanwhile there is a need for other features which involve adding new parameters to the commands. This is possible with HMP passthrough, but it provides no reliable way for apps to introspect features, so using QAPI modelling is highly desirable. This patch thus introduces new snapshot-{load,save,delete} commands to QMP that are intended to replace the old HMP counterparts. The new commands are given different names, because they will be using the new QEMU job framework and thus will have diverging behaviour from the HMP originals. It would thus be misleading to keep the same name. While this design uses the generic job framework, the current impl is still blocking. The intention that the blocking problem is fixed later. None the less applications using these new commands should assume that they are asynchronous and thus wait for the job status change event to indicate completion. In addition to using the job framework, the new commands require the caller to be explicit about all the block device nodes used in the snapshot operations, with no built-in default heuristics in use. Note that the existing "query-named-block-nodes" can be used to query what snapshots currently exist for block nodes. Acked-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-13-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> dgilbert: removed tests for now, the output ordering isn't deterministic
2021-02-08iotests: fix loading of common.config from tests/ subdirDaniel P. Berrangé1-2/+8
common.rc assumes it is being sourced from the same directory and so also tries to source common.config from the current working directory. With the ability to now have named tests in the tests/ subdir we need to check two locations for common.config. Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-12-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08iotests: add support for capturing and matching QMP eventsDaniel P. Berrangé1-1/+105
When using the _launch_qemu and _send_qemu_cmd functions from common.qemu, any QMP events get mixed in with the output from the commands and responses. This makes it difficult to write a test case as the ordering of events in the output is not stable. This introduces a variable 'capture_events' which can be set to a list of event names. Any events listed in this variable will not be printed, instead collected in the $QEMU_EVENTS environment variable. A new '_wait_event' function can be invoked to collect events at a fixed point in time. The function will first pull events cached in $QEMU_EVENTS variable, and if none are found, will then read more from QMP. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-11-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: introduce a delete_snapshot wrapperDaniel P. Berrangé3-1/+28
Make snapshot deletion consistent with the snapshot save and load commands by using a wrapper around the blockdev layer. The main difference is that we get upfront validation of the passed in device list (if any). Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-10-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: wire up support for snapshot device selectionDaniel P. Berrangé6-21/+43
Modify load_snapshot/save_snapshot to accept the device list and vmstate node name parameters previously added to the block layer. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-9-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: control whether snapshots are ovewrittenDaniel P. Berrangé5-7/+21
The traditional HMP "savevm" command will overwrite an existing snapshot if it already exists with the requested name. This new flag allows this to be controlled allowing for safer behaviour with a future QMP command. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-8-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08block: rename and alter bdrv_all_find_snapshot semanticsDaniel P. Berrangé5-13/+27
Currently bdrv_all_find_snapshot() will return 0 if it finds a snapshot, -1 if an error occurs, or if it fails to find a snapshot. New callers to be added want to distinguish between the error scenario and failing to find a snapshot. Rename it to bdrv_all_has_snapshot and make it return -1 on error, 0 if no snapshot is found and 1 if snapshot is found. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-7-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08block: allow specifying name of block device for vmstate storageDaniel P. Berrangé6-14/+35
Currently the vmstate will be stored in the first block device that supports snapshots. Historically this would have usually been the root device, but with UEFI it might be the variable store. There needs to be a way to override the choice of block device to store the state in. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-6-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08block: add ability to specify list of blockdevs during snapshotDaniel P. Berrangé6-63/+159
When running snapshot operations, there are various rules for which blockdevs are included/excluded. While this provides reasonable default behaviour, there are scenarios that are not well handled by the default logic. Some of the conditions do not have a single correct answer. Thus there needs to be a way for the mgmt app to provide an explicit list of blockdevs to perform snapshots across. This can be achieved by passing a list of node names that should be used. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-5-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: stop returning errno from load_snapshot()Daniel P. Berrangé5-14/+21
None of the callers care about the errno value since there is a full Error object populated. This gives consistency with save_snapshot() which already just returns a boolean value. Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> [PMD: Return false/true instead of -1/0, document function] Acked-by: Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210204124834.774401-4-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: Make save_snapshot() return bool, not 0/-1Philippe Mathieu-Daudé4-11/+18
Just for consistency, following the example documented since commit e3fe3988d7 ("error: Document Error API usage rules"), return a boolean value indicating an error is set or not. Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Acked-by: Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210204124834.774401-3-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08block: push error reporting into bdrv_all_*_snapshot functionsDaniel P. Berrangé7-90/+68
The bdrv_all_*_snapshot functions return a BlockDriverState pointer for the invalid backend, which the callers then use to report an error message. In some cases multiple callers are reporting the same error message, but with slightly different text. In the future there will be more error scenarios for some of these methods, which will benefit from fine grained error message reporting. So it is helpful to push error reporting down a level. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> [PMD: Initialize variables] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210204124834.774401-2-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: Display the migration blockersDr. David Alan Gilbert1-0/+9
Update 'info migrate' to display migration blocking information. If the outbound migration is not blocked, there is no change, however if it is blocked a message is displayed with a list of reasons why, e.g. qemu-system-x86_64 -nographic -smp 4 -m 4G -M pc,usb=on \ -chardev null,id=n -device usb-serial,chardev=n \ -virtfs local,path=/home,mount_tag=fs,security_model=none \ -drive if=virtio,file=myimage.qcow2 (qemu) info migrate globals: store-global-state: on only-migratable: off send-configuration: on send-section-footer: on decompress-error-check: on clear-bitmap-shift: 18 Outgoing migration blocked: Migration is disabled when VirtFS export path '/home' is mounted in the guest using mount_tag 'fs' non-migratable device: 0000:00:01.2/1/usb-serial Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20210202135522.127380-3-dgilbert@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: Add blocker informationDr. David Alan Gilbert4-2/+43
Modify query-migrate so that it has a flag indicating if outbound migration is blocked, and if it is a list of reasons. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20210202135522.127380-2-dgilbert@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: Fix a few absurdly defective error messagesMarkus Armbruster1-12/+11
migrate_params_check() has a number of error messages of the form Parameter 'NAME' expects is invalid, it should be ... Fix them to something like Parameter 'NAME' expects a ... Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20210202141734.2488076-5-armbru@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: Fix cache_init()'s "Failed to allocate" error messagesMarkus Armbruster1-4/+2
cache_init() attempts to handle allocation failure. The two error messages are garbage, as untested error messages commonly are: Parameter 'cache size' expects Failed to allocate cache Parameter 'cache size' expects Failed to allocate page cache Fix them to just Failed to allocate cache Failed to allocate page cache Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20210202141734.2488076-4-armbru@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-02-08migration: Clean up signed vs. unsigned XBZRLE cache-sizeMarkus Armbruster7-9/+9
73af8dd8d7 "migration: Make xbzrle_cache_size a migration parameter" (v2.11.0) made the new parameter unsigned (QAPI type 'size', uint64_t in C). It neglected to update existing code, which continues to use int64_t. migrate_xbzrle_cache_size() returns the new parameter. Adjust its return type. QMP query-migrate-cache-size returns migrate_xbzrle_cache_size(). Adjust its return type. migrate-set-parameters passes the new parameter to xbzrle_cache_resize(). Adjust its parameter type. xbzrle_cache_resize() passes it on to cache_init(). Adjust its parameter type. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20210202141734.2488076-3-armbru@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>