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.
Don't update _size in the getter, so it can be unlocked (which is
helpful for QubesOS/qubes-issues#5935).
!!! If cherry-picking for release4.0, also adjust import_data() to !!!
!!! use self.size (no underscore) instead of self._get_size() !!!
Fix load error reporting - make sure 'err' variable is transferred into
'runTest' function scope.
Then, relax test loading requirements - use 'resolve' instead of 'load',
to bypass dependencies check (defined in setup.py of the package). The
required dependencies should be handled by RPM already, and in some
cases may not match those in python package. An example is PDF
converter, where dependencies at python level are set for the actual
converter, which is irrelevant for running tests from dom0 (tests will
interact with PDF converter inside a VM).
XSA-320 / CVE-2020-0543 affects Ivy Bridge and later platforms, but a
fix (microcode update) won't be available for Ivy Bridge. Disable
affected instruction (do not announce it in CPUID - complying software
should not use it then).
The revisions_to_keep should be inherited from the pool by default (or
whatever else logic is in the storage pool driver). When creating VM in
a specific pool, volumes config is re-initialized to include right
defaults. But the config cleaning logic in `_clean_volume_config()`
failed to remove revisions_to_keep property initialized by the default
pool driver. This prevented new pool driver to apply its own default
logic.
An extreme result was inability to create a VM in 'file' pool at all,
because it refuses any revisions_to_keep > 1, and the default LVM
pool has revisions_to_keep = 2.
Keep it at original files, to still load it using compat rules.
This way the update should not break user's policies.
Note the unchanged policy files are still going to be removed - meaning
those calls will use the new policy.
QubesOS/qubes-issues#4370
* origin/pr/344:
travis: pip -> pip3
Update .travis.yml
Drop initial root thin pool definition
Prevent double hyphens in thin_pool parsing
Rename default root thin pool from 'lvm' to 'root'
* rename-property-del-reset:
Fire property-reset event when default value might change
Convert handler to use property-reset instead of property-del
Remove leftovers of default_fw_netvm
Deprecate property-del:name events and introduce property-reset:name instead
Those are only some cases, the most obvious ones:
- defaults inherited from a template
- xid and start_time on domain start/stop
- IP related properties
- icon
QubesOS/qubes-issues#5834
There was also one case of triggering property-{del => reset}
synthetically on default value change. Adjust it too and drop -pre-
event call in that case.
QubesOS/qubes-issues#5834
And the same for -pre- events.
The property-del name is really confusing (it makes sense only for those
with deep knowledge of the implementation), because the property isn't
really deleted - it is only reverted to the "default" state (which most
properties have). So, name the event property-reset, intentionally
similar to property-set, as it is also kind of a value change.
Additionally the property-reset event is meant to be called when the
(dynamic) default value changes. Due to the current implementation, it
is a manual process so it can't be guaranteed to be called in all those
cases, but lets try to cover as much as possible.
FixesQubesOS/qubes-issues#5834
...when verifying old backup restored. It wasn't present in the backup,
but its presence is expected in some cases. Properly setting 'servicevm'
feature is tested elsewhere.
