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2019-11-05image-fuzzer: Use OSerror.strerror instead of tuple subscriptEduardo Habkost
OSError can't be used like a tuple on Python 3, so change the code to use `e.sterror` instead of `e[1]`. Reported-by: John Snow <jsnow@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 20191021214117.18091-1-ehabkost@redhat.com Message-Id: <20191021214117.18091-1-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Use errors parameter of subprocess.Popen()Eduardo Habkost
Instead of manually encoding stderr and stdout output, use `errors` parameter of subprocess.Popen(). This will make process.communicate() return unicode strings instead of bytes objects. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-11-ehabkost@redhat.com Message-Id: <20191016192430.25098-11-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Run using python3Eduardo Habkost
image-fuzzer is now supposed to be ready to run using Python 3. Remove the __future__ imports and change the interpreter line to "#!/usr/bin/env python3". Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-10-ehabkost@redhat.com Message-Id: <20191016192430.25098-10-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Encode file name and file format to bytesEduardo Habkost
Callers of create_image() will pass strings as arguments, but the Image class will expect bytes objects to be provided. Encode them inside create_image(). Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-9-ehabkost@redhat.com Message-Id: <20191016192430.25098-9-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Use bytes constant for field valuesEduardo Habkost
Field values are supposed to be bytes objects, not unicode strings. Change two constants that were declared as strings. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-8-ehabkost@redhat.com Message-Id: <20191016192430.25098-8-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Return bytes objects on string fuzzing functionsEduardo Habkost
No caller of fuzzer functions is interested in unicode string values, so replace them with bytes sequences. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-7-ehabkost@redhat.com Message-Id: <20191016192430.25098-7-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Use %r for all fiels at Field.__repr__()Eduardo Habkost
This makes the formatting code simpler, and safer if we change the type of self.value from str to bytes. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-6-ehabkost@redhat.com Message-Id: <20191016192430.25098-6-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Use io.StringIOEduardo Habkost
StringIO.StringIO is not available on Python 3, but io.StringIO is available on both Python 2 and 3. io.StringIO is slightly different from the Python 2 StringIO module, though, so we need bytes coming from subprocess.Popen() to be explicitly decoded. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-5-ehabkost@redhat.com Message-Id: <20191016192430.25098-5-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Explicitly use integer division operatorEduardo Habkost
Most of the division expressions in image-fuzzer assume integer division. Use the // operator to keep the same behavior when we move to Python 3. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-4-ehabkost@redhat.com Message-Id: <20191016192430.25098-4-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Write bytes instead of string to image fileEduardo Habkost
This is necessary for Python 3 compatibility. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-3-ehabkost@redhat.com Message-Id: <20191016192430.25098-3-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-11-05image-fuzzer: Open image files in binary modeEduardo Habkost
This probably never caused problems because on Linux there's no actual newline conversion happening, but on Python 3 the binary/text distinction is stronger and we must explicitly open the image file in binary mode. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-2-ehabkost@redhat.com Message-Id: <20191016192430.25098-2-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2018-06-08python: futurize -f lib2to3.fixes.fix_renamesEduardo Habkost
Change sys.maxint to sys.maxsize. This is necessary for Python 3 compatibility. Done using: $ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \ sort -u | grep -v README.sh4) $ futurize -w -f lib2to3.fixes.fix_renames $py Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20180608122952.2009-9-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-08python: futurize -f lib2to3.fixes.fix_reduceEduardo Habkost
Handle the move of reduce() to functools.reduce(). This is necessary for Python 3 compatibility. Done using: $ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \ sort -u | grep -v README.sh4) $ futurize -w -f lib2to3.fixes.fix_reduce $py Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20180608122952.2009-7-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-08python: futurize -f libfuturize.fixes.fix_next_callEduardo Habkost
Change obj.next() calls to next(obj). This is necessary for Python 3 compatibility. Done using: $ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \ sort -u | grep -v README.sh4) $ futurize -w -f libfuturize.fixes.fix_next_call $py Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20180608122952.2009-4-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-08python: futurize -f libfuturize.fixes.fix_absolute_importEduardo Habkost
Make implicit relative imports explicit and add "from __future__ import absolute_import" at the top of each relevant module. This is necessary for Python 3 compatibility. Done using: $ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \ sort -u | grep -v README.sh4) $ futurize -w -f libfuturize.fixes.fix_absolute_import $py Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20180608122952.2009-3-ehabkost@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-08python: futurize -f libfuturize.fixes.fix_print_with_importEduardo Habkost
Change all Python code to use print as a function. This is necessary for Python 3 compatibility. Done using: $ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \ sort -u | grep -v README.sh4) $ futurize -w -f libfuturize.fixes.fix_print_with_import $py Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Fam Zheng <famz@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20180608122952.2009-2-ehabkost@redhat.com> [ehabkost: fixup tests/docker/docker.py] Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2016-02-08tests: Use Python 2.6 "except E as ..." syntaxMarkus Armbruster
PEP 8 calls for it, because it's forward compatible with Python 3. Supported since Python 2.6, which we require (commit fec2103). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <1450425164-24969-5-git-send-email-armbru@redhat.com>
2015-09-11typofixes - v4Veres Lajos
Signed-off-by: Veres Lajos <vlajos@gmail.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-22block: delete cow block driverStefan Hajnoczi
This patch removes support for the cow file format. Normally we do not break backwards compatibility but in this case there is no impact and it is the most logical option. Extraordinary claims require extraordinary evidence so I will show why removing the cow block driver is the right thing to do. The cow file format is the disk image format for Usermode Linux, a way of running a Linux system in userspace. The performance of UML was never great and it was hacky, but it enjoyed some popularity before hardware virtualization support became mainstream. QEMU's block/cow.c is supposed to read this image file format. Unfortunately the file format was underspecified: 1. Earlier Linux versions used the MAXPATHLEN constant for the backing filename field. The value of MAXPATHLEN can change, so Linux switched to a 4096 literal but QEMU has a 1024 literal. 2. Padding was not used on the header struct (both in the Linux kernel and in QEMU) so the struct layout varied across architectures. In particular, i386 and x86_64 were different due to int64_t alignment differences. Linux now uses __attribute__((packed)), QEMU does not. Therefore: 1. QEMU cow images do not conform to the Linux cow image file format. 2. cow images cannot be shared between different host architectures. This means QEMU cow images are useless and QEMU has not had bug reports from users actually hitting these issues. Let's get rid of this thing, it serves no purpose and no one will be affected. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-id: 1410877464-20481-1-git-send-email-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-22layout: Add generators for refcount table and blocksMaria Kustova
Refcount structures are placed in clusters randomly selected from all unallocated host clusters. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Maria Kustova <maria.k@catit.be> Reviewed-by: Fam Zheng <famz@redhat.com> Message-id: 7e2f38608db6fba2da53997390b19400d445c45d.1408450493.git.maria.k@catit.be Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-22fuzz: Add fuzzing functions for entries of refcount table and blocksMaria Kustova
Reviewed-by: Fam Zheng <famz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Maria Kustova <maria.k@catit.be> Message-id: c9f4027b6f401c67e9d18f94aed29be445e81d48.1408450493.git.maria.k@catit.be Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-22image-fuzzer: Trivial readability and formatting improvementsMaria Kustova
Signed-off-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-20runner: Kill a program under test by time-outMaria Kustova
If a program under test get frozen, the test should finish and report about its failure. In such cases the runner waits for 10 minutes until the program ends its execution. After this time-out the program will be terminated and the test will be marked as failed. For current limitation of test image size to 10 MB as a maximum an execution of each command takes about several seconds in general, so 10 minutes is enough to discriminate freeze, but not drastically increase an overall test duration. Signed-off-by: Maria Kustova <maria.k@catit.be> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-08-20runner: Add an argument for test durationMaria Kustova
After the specified duration the runner stops executing new tests, but it doesn't interrupt running ones. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Maria Kustova <maria.k@catit.be> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-08-15image-fuzzer: Reduce number of generator functions in __init__Maria Kustova
Some issues can be found only when a fuzzed image has a partial structure, e.g. has L1/L2 tables but no refcount ones. Generation of an entirely defined image limits these cases. Now the Image constructor creates only a header and a backing file name (if any), other image elements are generated in the 'create_image' API. Signed-off-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-15image-fuzzer: Add generators of L1/L2 tablesMaria Kustova
Entries in L1/L2 entries are based on a portion of random guest clusters. L2 entries contain offsets to host image clusters filled with random data. Clusters for L1/L2 tables and guest data are selected randomly. Signed-off-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-15image-fuzzer: Add fuzzing functions for L1/L2 table entriesMaria Kustova
Signed-off-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-15image-fuzzer: Public API for image-fuzzer/runner/runner.pyMaria Kustova
__init__.py provides the public API required by the test runner Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-15image-fuzzer: Generator of fuzzed qcow2 imagesMaria Kustova
The layout submodule of the qcow2 package creates a random valid image, randomly selects some amount of its fields, fuzzes them and write the fuzzed image to the file. Fuzzing process can be controlled by an external configuration. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-15image-fuzzer: Fuzzing functions for qcow2 imagesMaria Kustova
The fuzz submodule of the qcow2 image generator contains fuzzing functions for image fields. Each fuzzing function contains a list of constraints and a call of a helper function that randomly selects a fuzzed value satisfied to one of constraints. For now constraints include only known as invalid or potentially dangerous values. But after investigation of code coverage by fuzz tests they will be expanded by heuristic values based on inner checks and flows of a program under test. Now fuzzing of a header, header extensions and a backing file name is supported. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-15image-fuzzer: Tool for fuzz tests executionMaria Kustova
The purpose of the test runner is to prepare the test environment (e.g. create a work directory, a test image, etc), execute a program under test with parameters, indicate a test failure if the program was killed during the test execution and collect core dumps, logs and other test artifacts. The test runner doesn't depend on an image format, so it can be used with any external image generator. [Fixed path to qcow2 format module "qcow2" instead of "../qcow2" since runner.py is no longer in a sub-directory. --Stefan] Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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