- Removed all own class attributes to avoid name clashes with delegated
class attributes.
- Implemented the previously missing Pool.usage_details property.
- Shadowed all class attributes as instance properties. This is required
as the parent classes enforce the class attributes upon the
CallbackPool & CallbackVolume classes, but they need to be delegated to
the class of the _cb_impl object. We also cannot implement them as class
attributes in CallbackVolume & CallbackPool as they need to work for
arbitrary backend drivers and two backend drivers must not interfere with
each other. Possible alternative: One could dynamically create classes.
Unfortunately this appears to be necessary due to
various Qubes OS `assert` checks and to get `__str__()` et al
from the super class. It also means that we have to implement
all methods of the super class (in the future as well).
* devel20200705:
tests: skip gnome-terminal on xfce template flavor
tests: fix FD leak in qrexec test
tests: switch default LVM pool to qubes_dom0/vm-pool
backup: fix error handler for scrypt errors
Adjust code for possibly coroutine Volume.export() and Volume.export_end()
storage: add Volume.export_end() function
backup: add support for calling a function after backing up a file/volume
backup: call volume.export() just before actually extracting it
vm/dispvm: place all volumes in the same pool as DispVM's template
tests: extend TestPool storage driver to make create_on_disk working
storage: pass a copy of volume_config to pool.init_volume
tests: cleanup properly in wait_on_fail decorator
* origin/pr/352:
audio: set sink volume to workaround alsa save/restore issue
audio: increase timeout to match hvm loading
audio: auxiliary pauses should be harmless now, place them back just in case
audio: add silence threshold
audio: unload guest' module-vchan-sink in hvm tests
audio: fix prepare_audio_vm
audio: do not use pacat on copying audio_in.raw
Audio: rework audio tests
Similart to property-reset:xid, emit property-reset:stubdom_xid when
domain is started/stopped. This allows client side of the Admin API
(qubes-core-admin-client) to invalidate the cache when necessary.
Found by audio tests: #352
Now Volume.export() may be a coroutine and also may be accompanied by
Volume.export_end() cleaning up after it.
See previous commits for building blocks for this.
This commit adjusts usage of Volume.export() and adds matching
Volume.export_end() throughout the code base.
FixesQubesOS/qubes-issues#5935
This is a counterpart to Volume.export(). Up until now, no driver needed
any cleanup after exporting data, but it doesn't mean there won't be
any. This is especially relevant because Volume.export() is supposed to
return a path of a snapshot from before VM start - which may be a
different one than currently active one.
QubesOS/qubes-issues#5935
When Volume.export is called late and can be also a coroutine, it may
make sense to also have a cleanup function for changes made by it.
This commit only adjust backup code internals, but doesn't call
appropriate Volume function yet.
QubesOS/qubes-issues#5935
There are two reasons for this:
- call it from a coroutine, allowing export() itself be a coroutine
- avoid calling export() when only collecting preliminary backup
summary
Both needs some more changes in other parts of the codebase to be useful
(see next commits).
This will be especially useful when export() will need to make some
changes (like, create a snapshot, mount something etc).
QubesOS/qubes-issues#5935
Make all volume's pool controlled by DisposableVM Template. This
specifically makes DispVM's volatile volume to be placed directly in the
same pool as its template.
FixesQubesOS/qubes-issues#5933
Add dummy TestVolume with empty create() method. Other core code
requires also TestPool.get_volume implemented, so add that too (naive
version remembering instances returned from TestPool.init_volume).
Avoid local modification in a pool's init_volume influence
vm.volume_config. Currently every pool driver replaces
volume_config['pool'] with a pool object (instead of name) and it leads
to confusing cases where depending on start stage, it is sometimes an
object and sometimes a string.
Additionally, some pool drivers may modify volume_config in unexpected
way - for example test pool driver removes 'pool' entry entirely. Avoid
this fragile interface by giving pool driver a copy of volume_config,
instead of vm.volume_config directly.
Note one side effect is that 'vid' (and other pool-specific parameters)
is not set into vm.volume_config directly after creating a VM, but
possibly only after loading from XML. This should not be an issue in
theory (no core code should expect it), but if some place use
volume_config instead of Volume instance for getting pool-specific
options, it should be fixed.
Close transport used to wait for user input, otherwise all further tests
would fail on cleanup (FD leak detected). This in practice is only
useful when using wait_on_fail decorator without --failfast option.
