This was lazily copied from UML but really made no sense in the context
of QEMU. First QEMU needs the virtfs option to define the mount tag and
in addition a 9p mount should be used rather than 'hostfs'.
The glob match was completely broken for --verbose because globs
are actually path matches, not generally for strings. Instead
match based on regular expressions.
First the verbose option was fixed to store it as an array as well
as write any list arguments into the kernel command line properly
(str() would include []). This has worked up until now because the
'in' keyword in python will work on strings just as well
as lists, for example:
>>> 'test' in 'this,is,a,test'
True
Then, the glob match was replaced with a regex match. Any exceptions
are caught and somewhat ignored (printed, but only seen with --debug).
This only guards against fatal exceptions from a user passing an
invalid expression.
If the user specifies the same parent directory for several outfiles
skip mounting since it already exists. For example:
--monitor /outfiles/monitor.txt --result /outfiles/result.txt
Inside the virtual environments /tmp is mounted as its own FS and not
taken from the host. This poses issues if any output files are directly
under /tmp since test-runner tries to mount the parent directory (/tmp).
The can be fixed by ensuring these output files are either not under
/tmp or at least one folder down the tree (e.g. /tmp/outputs/outfile.txt).
Now this requirement is enforced and test-runner will not start if any
output files parent directory is /tmp.
Usually the test home directory is a git repo somewhere e.g. under
/home. But if the home directory is located under /tmp this poses
a problem since UML remounts /tmp. To handle both cases mount
the home directory explicity.
Certain aspects of QEMU like mounting host directories may still require
root access but for UML this is not the case. To handle both cases first
check if SUDO_UID/GID are set and use those to obtain the actual users
ID's. Otherwise if running as non-root use the UID/GID of the user
directly.
This only posed a problem oddly if the kernel binary was in the same
directory as test-runner. Resolving the absolute path with the
argument parser resolves the issue.
The TIOCSTTY ioctl was not shared between UML and QEMU which prevented
any console input from making it into UML. This fixes that, and now
ctrl-c can be used to stop UML test execution.
The MountInfo tuple was changed to explicitly take a source string. This
is redundant for UML and system mounts since the fstype/source are the same,
but it allows QEMU to specify the '9p' fstype and use MountInfo rather than
calling mount() explicitly.
This also moves logging cleanup into _prepare_mounts so both UML and QEMU
can use it.
This commonizes some mounting code between QEMU and UML to allow exporting
of files to the host environment. UML does this with a hostfs mount while
QEMU still uses 9p.
The common code sanitizing the inputs has been put into _prepare_outfiles
and _prepare_mounts was modified to take an 'extra' arugment containing
additional mount points.
The results and monitor parent directories are now passed into the environment
via arguments, and these are hidden from the help text (in addition to testhome)
If --help or unknown options were supplied to test-runner python
would thrown a maximum recusion depth exception. This was due to
the way ArgumentParser was subclassed.
To fix this call ArgumentParser.__init__() rather than using the
super() method. And do this also for the RunnerCoreArgParse
subclass as well. In addition the namespace argument was removed
from parse_args since its not used, and instead supplied directly
to the parents parse_args method.
This allows test-runner to run inside a UML binary which has some
advantages, specifically time-travel/infinite CPU speed. This should
fix any scheduler related failures we have on slower systems.
Currently this runner does not suppor the same features as the Qemu
runner, specifically:
- No hardware passthrough
- No logging/monitor (UML -> host mounting isn't implemented yet)
This (as well as subsequent commits) will separate test-runner into two
parts:
1. Environment setup
2. Running tests
Spurred by interest in adding UML/host support, test-runner was in need
of a refactor to separate out the environment setup and actually running
the tests.
The environment (currently only Qemu) requires quite a bit of special
handling (ctypes mounting/reboot, 9p mounts, tons of kernel options etc)
which nobody writing tests should need to see or care about. This has all
been moved into 'runner.py'.
Running the tests (inside test-runner) won't change much.
The new 'runner.py' module adds an abstraction class which allows different
Runner's to be implemented, and setup their own environment as they see
fit. This is in preparation for UML and Host runners.
James Prestwood