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f0b3840fb6
python2 will be end of life by the time of the next libvirt release. All our supported build targets, including CentOS7, have a python3 build available. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
495 lines
16 KiB
Python
Executable File
495 lines
16 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# hyperv_wmi_generator.py: generates most of the WMI type mapping code
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#
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# Copyright (C) 2011 Matthias Bolte <matthias.bolte@googlemail.com>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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import sys
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import os
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import os.path
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separator = "/*" + ("*" * 50) + "*\n"
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wmi_version_separator = "/"
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wmi_classes_by_name = {}
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class WmiClass:
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"""Represents WMI class and provides methods to generate C code.
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This class holds one or more instances of WmiClassVersion because with the
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Windows 2012 release, Microsoft introduced "v2" version of Msvm_* family of
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classes that need different URI for making wsman requests and also have
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some additional/changed properties (though many of the properties are the
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same as in "v1". Therefore, this class makes sure that C code is generated
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for each of them while avoiding name conflicts, identifies common members,
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and defined *_WmiInfo structs holding info about each version so the driver
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code can make the right choices based on which Hyper-V host it's connected
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to.
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"""
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def __init__(self, name, versions=None):
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self.name = name
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self.versions = versions if versions else list()
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self.common = None
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def prepare(self):
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"""Prepares the class for code generation
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Makes sure that "versioned" classes are sorted by version, identifies
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common properties and ensures that they are aligned by name and
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type in each version
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"""
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# sort versioned classes by version in case input file did not have them
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# in order
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self.versions = sorted(self.versions, key=lambda cls: cls.version or "")
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# if there's more than one version make sure first one has name suffixed
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# because we'll generate "common" member and will be the "base" name
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if len(self.versions) > 1:
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first = self.versions[0]
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if first.version is None:
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first.version = "v1"
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first.name = "%s_%s" % (first.name, first.version)
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# finally, identify common members in all versions and make sure they
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# are in the same order - to ensure C struct member alignment
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self._align_property_members()
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def generate_classes_header(self):
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"""Generate C header code and return it as string
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Declares:
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<class_name>_Data - used as one of hypervObject->data members
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<class_name>_TypeInfo - used as wsman XmlSerializerInfo
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<class_name> - "inherits" hypervObject struct
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"""
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name_upper = self.name.upper()
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header = separator
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header += " * %s\n" % self.name
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header += " */\n"
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header += "\n"
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header += "#define %s_CLASSNAME \\\n" % name_upper
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header += " \"%s\"\n" % self.name
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header += "\n"
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header += "#define %s_WQL_SELECT \\\n" % name_upper
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header += " \"SELECT * FROM %s \"\n" % self.name
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header += "\n"
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header += "extern hypervWmiClassInfoListPtr %s_WmiInfo;\n\n" % self.name
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header += self._declare_data_structs()
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header += self._declare_hypervObject_struct()
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return header
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def generate_classes_source(self):
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"""Returns a C code string defining wsman data structs
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Defines:
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<class_name>_Data structs
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<class_name>_WmiInfo - list holding metadata (e.g. request URIs) for
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each known version of WMI class.
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"""
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source = separator
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source += " * %s\n" % self.name
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source += " */\n"
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for cls in self.versions:
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source += "SER_START_ITEMS(%s_Data)\n" % cls.name
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for property in cls.properties:
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source += property.generate_classes_source(cls.name)
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source += "SER_END_ITEMS(%s_Data);\n\n" % cls.name
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# also generate typemap data while we're here
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source += "hypervCimType %s_Typemap[] = {\n" % cls.name
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for property in cls.properties:
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source += property.generate_typemap()
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source += ' { "", "", 0 },\n' # null terminated
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source += '};\n\n'
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source += self._define_WmiInfo_struct()
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source += "\n\n"
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return source
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def generate_classes_typedef(self):
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"""Returns C string for typdefs"""
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typedef = "typedef struct _%s %s;\n" % (self.name, self.name)
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if self.common is not None:
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typedef += "typedef struct _%s_Data %s_Data;\n" % (self.name, self.name)
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for cls in self.versions:
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typedef += "typedef struct _%s_Data %s_Data;\n" % (cls.name, cls.name)
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return typedef
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def _declare_data_structs(self):
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"""Returns string C code declaring data structs.
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The *_Data structs are members of hypervObject data union. Each one has
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corresponding *_TypeInfo that is used for wsman unserialization of
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response XML into the *_Data structs. If there's a "common" member, it
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won't have corresponding *_TypeInfo because this is a special case only
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used to provide a common "view" of v1, v2 etc members
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"""
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header = ""
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if self.common is not None:
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header += "struct _%s_Data {\n" % self.name
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for property in self.common:
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header += property.generate_classes_header()
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header += "};\n\n"
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# Declare actual data struct for each versions
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for cls in self.versions:
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header += "#define %s_RESOURCE_URI \\\n" % cls.name.upper()
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header += " \"%s\"\n" % cls.uri_info.resourceUri
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header += "\n"
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header += "struct _%s_Data {\n" % cls.name
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for property in cls.properties:
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header += property.generate_classes_header()
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header += "};\n\n"
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header += "SER_DECLARE_TYPE(%s_Data);\n" % cls.name
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return header
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def _declare_hypervObject_struct(self):
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"""Return string for C code declaring hypervObject instance"""
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header = "\n/* must match hypervObject */\n"
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header += "struct _%s {\n" % self.name
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header += " union {\n"
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# if there's common use it as "common" else first and only version is
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# the "common" member
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if self.common is not None:
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header += " %s_Data *common;\n" % self.name
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else:
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header += " %s_Data *common;\n" % self.versions[0].name
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for cls in self.versions:
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header += " %s_Data *%s;\n" % (cls.name, cls.version)
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header += " } data;\n"
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header += " hypervWmiClassInfoPtr info;\n"
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header += " %s *next;\n" % self.name
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header += "};\n"
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header += "\n\n\n"
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return header
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def _define_WmiInfo_struct(self):
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"""Return string for C code defining *_WmiInfo struct
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Those structs hold info with meta-data needed to make wsman requests for
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each version of WMI class
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"""
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source = "hypervWmiClassInfoListPtr %s_WmiInfo = &(hypervWmiClassInfoList) {\n" % self.name
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source += " .count = %d,\n" % len(self.versions)
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source += " .objs = (hypervWmiClassInfoPtr []) {\n"
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for cls in self.versions:
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source += " &(hypervWmiClassInfo) {\n"
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source += " .name = %s_CLASSNAME,\n" % self.name.upper()
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if cls.version is not None:
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source += " .version = \"%s\",\n" % cls.version
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else:
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source += " .version = NULL,\n"
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source += " .rootUri = %s,\n" % cls.uri_info.rootUri
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source += " .resourceUri = %s_RESOURCE_URI,\n" % cls.name.upper()
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source += " .serializerInfo = %s_Data_TypeInfo,\n" % cls.name
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source += " .propertyInfo = %s_Typemap\n" % cls.name
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source += " },\n"
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source += " }\n"
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source += "};\n"
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return source
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def _align_property_members(self):
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"""Identifies common properties in all class versions.
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Makes sure that properties in all versions are ordered with common
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members first and that they are in the same order. This makes the
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generated C structs memory aligned and safe to access via the "common"
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struct that "shares" members with v1, v2 etc.
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"""
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num_classes = len(self.versions)
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common = {}
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property_info = {}
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if num_classes < 2:
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return
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# count property occurrences in all class versions
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for cls in self.versions:
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for prop in cls.properties:
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# consdered same if matches by name AND type
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key = "%s_%s_%s" % (prop.name, prop.type, prop.is_array)
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if key in property_info:
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property_info[key][1] += 1
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else:
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property_info[key] = [prop, 1]
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# isolate those that are common for all and keep track of their positions
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pos = 0
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for key in sorted(property_info):
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info = property_info[key]
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# exists in all class versions
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if info[1] == num_classes:
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common[info[0].name] = [info[0], pos]
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pos += 1
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# alter each version's property list so that common members are first
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# and in the same order as in the common dictionary
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for cls in self.versions:
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index = 0
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count = len(cls.properties)
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while index < count:
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prop = cls.properties[index]
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# it's a "common" property
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if prop.name in common:
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pos = common[prop.name][1]
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# move to the same position as in "common" dictionary
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if index != pos:
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tmp = cls.properties[pos]
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cls.properties[pos] = prop
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cls.properties[index] = tmp
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else:
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index += 1
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else:
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index += 1
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# finally, get common properties as list sorted by position in dictionary
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tmp = sorted(common.values(), key=lambda x: x[1])
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self.common = []
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for x in tmp:
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self.common.append(x[0])
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class ClassUriInfo:
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"""Prepares URI information needed for wsman requests."""
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def __init__(self, wmi_name, version):
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self.rootUri = "ROOT_CIMV2"
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self.resourceUri = None
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baseUri = "http://schemas.microsoft.com/wbem/wsman/1/wmi/root/cimv2"
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if wmi_name.startswith("Msvm_"):
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baseUri = "http://schemas.microsoft.com/wbem/wsman/1/wmi/root/virtualization"
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self.rootUri = "ROOT_VIRTUALIZATION"
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if version == "v2":
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baseUri += "/v2"
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self.rootUri = "ROOT_VIRTUALIZATION_V2"
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self.resourceUri = "%s/%s" % (baseUri, wmi_name)
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class WmiClassVersion:
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"""Represents specific version of WMI class."""
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def __init__(self, name, version, properties, uri_info):
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self.name = name
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self.version = version
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self.properties = properties
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self.uri_info = uri_info
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class Property:
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typemap = {
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"boolean": "BOOL",
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"string": "STR",
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"datetime": "STR",
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"int8": "INT8",
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"sint8": "INT8",
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"int16": "INT16",
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"sint16": "INT16",
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"int32": "INT32",
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"sint32": "INT32",
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"int64": "INT64",
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"sint64": "INT64",
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"uint8": "UINT8",
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"uint16": "UINT16",
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"uint32": "UINT32",
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"uint64": "UINT64"
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}
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def __init__(self, type, name, is_array):
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if type not in Property.typemap:
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report_error("unhandled property type %s" % type)
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self.type = type
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self.name = name
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self.is_array = is_array
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def generate_classes_header(self):
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if self.is_array:
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return " XML_TYPE_DYN_ARRAY %s;\n" % self.name
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else:
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return " XML_TYPE_%s %s;\n" \
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% (Property.typemap[self.type], self.name)
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def generate_classes_source(self, class_name):
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if self.is_array:
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return " SER_NS_DYN_ARRAY(%s_RESOURCE_URI, \"%s\", 0, 0, %s),\n" \
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% (class_name.upper(), self.name, self.type)
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else:
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return " SER_NS_%s(%s_RESOURCE_URI, \"%s\", 1),\n" \
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% (Property.typemap[self.type], class_name.upper(), self.name)
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def generate_typemap(self):
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return ' { "%s", "%s", %s },\n' % (self.name, self.type.lower(), str(self.is_array).lower())
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def open_and_print(filename):
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if filename.startswith("./"):
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print(" GEN " + filename[2:])
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else:
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print(" GEN " + filename)
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return open(filename, "wt")
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def report_error(message):
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print("error: " + message)
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sys.exit(1)
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def parse_class(block, number):
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# expected format: class <name>
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header_items = block[0][1].split()
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if len(header_items) != 2:
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report_error("line %d: invalid block header" % (number))
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assert header_items[0] == "class"
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name = header_items[1]
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properties = []
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version = None
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wmi_name = name
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ns_separator = name.find(wmi_version_separator)
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if ns_separator != -1:
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version = name[:ns_separator]
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wmi_name = name[ns_separator + 1:]
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name = "%s_%s" % (wmi_name, version)
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for line in block[1:]:
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# expected format: <type> <name>
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items = line[1].split()
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if len(items) != 2:
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report_error("line %d: invalid property" % line[0])
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if items[1].endswith("[]"):
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items[1] = items[1][:-2]
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is_array = True
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else:
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is_array = False
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properties.append(Property(type=items[0], name=items[1],
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is_array=is_array))
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cls = WmiClassVersion(name=name, version=version, properties=properties,
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uri_info=ClassUriInfo(wmi_name, version))
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if wmi_name in wmi_classes_by_name:
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wmi_classes_by_name[wmi_name].versions.append(cls)
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else:
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wmi_classes_by_name[wmi_name] = WmiClass(wmi_name, [cls])
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def main():
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if len(sys.argv) != 3:
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report_error("usage: %s srcdir builddir" % sys.argv[0])
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input_filename = os.path.join(sys.argv[1], "hyperv", "hyperv_wmi_generator.input")
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output_dirname = os.path.join(sys.argv[2], "hyperv")
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classes_typedef = open_and_print(os.path.join(output_dirname, "hyperv_wmi_classes.generated.typedef"))
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classes_header = open_and_print(os.path.join(output_dirname, "hyperv_wmi_classes.generated.h"))
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classes_source = open_and_print(os.path.join(output_dirname, "hyperv_wmi_classes.generated.c"))
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# parse input file
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number = 0
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block = None
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for line in open(input_filename, "rt").readlines():
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number += 1
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if "#" in line:
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line = line[:line.index("#")]
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line = line.lstrip().rstrip()
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if len(line) < 1:
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continue
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if line.startswith("class"):
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if block is not None:
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report_error("line %d: nested block found" % (number))
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else:
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block = []
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if block is not None:
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if line == "end":
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if block[0][1].startswith("class"):
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parse_class(block, number)
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block = None
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else:
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block.append((number, line))
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# write output files
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notice = "/* Generated by hyperv_wmi_generator.py */\n\n\n\n"
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classes_typedef.write(notice)
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classes_header.write(notice)
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classes_source.write(notice)
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names = sorted(wmi_classes_by_name.keys())
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for name in names:
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cls = wmi_classes_by_name[name]
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cls.prepare()
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classes_typedef.write(cls.generate_classes_typedef())
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classes_header.write(cls.generate_classes_header())
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classes_source.write(cls.generate_classes_source())
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if __name__ == "__main__":
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main()
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