4a82e468e7
For everything typed so far, type this parameter as Optional[QAPISourceInfo]. In the most generic case, QAPISchemaEntity's info field may be None to represent types that come from built-in definitions. Although some Entity types may not currently have any built-in definitions, it is not easily possible to constrain the type except on an ad-hoc basis using assertions. It's easier and simpler, then, to just say it's always an Optional type. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-16-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
339 lines
9.1 KiB
Python
339 lines
9.1 KiB
Python
"""
|
|
QAPI command marshaller generator
|
|
|
|
Copyright IBM, Corp. 2011
|
|
Copyright (C) 2014-2018 Red Hat, Inc.
|
|
|
|
Authors:
|
|
Anthony Liguori <aliguori@us.ibm.com>
|
|
Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
Markus Armbruster <armbru@redhat.com>
|
|
|
|
This work is licensed under the terms of the GNU GPL, version 2.
|
|
See the COPYING file in the top-level directory.
|
|
"""
|
|
|
|
from typing import (
|
|
Dict,
|
|
List,
|
|
Optional,
|
|
Set,
|
|
)
|
|
|
|
from .common import c_name, mcgen
|
|
from .gen import (
|
|
QAPIGenC,
|
|
QAPISchemaModularCVisitor,
|
|
build_params,
|
|
ifcontext,
|
|
)
|
|
from .schema import (
|
|
QAPISchema,
|
|
QAPISchemaFeature,
|
|
QAPISchemaObjectType,
|
|
QAPISchemaType,
|
|
)
|
|
from .source import QAPISourceInfo
|
|
|
|
|
|
def gen_command_decl(name: str,
|
|
arg_type: Optional[QAPISchemaObjectType],
|
|
boxed: bool,
|
|
ret_type: Optional[QAPISchemaType]) -> str:
|
|
return mcgen('''
|
|
%(c_type)s qmp_%(c_name)s(%(params)s);
|
|
''',
|
|
c_type=(ret_type and ret_type.c_type()) or 'void',
|
|
c_name=c_name(name),
|
|
params=build_params(arg_type, boxed, 'Error **errp'))
|
|
|
|
|
|
def gen_call(name: str,
|
|
arg_type: Optional[QAPISchemaObjectType],
|
|
boxed: bool,
|
|
ret_type: Optional[QAPISchemaType]) -> str:
|
|
ret = ''
|
|
|
|
argstr = ''
|
|
if boxed:
|
|
assert arg_type
|
|
argstr = '&arg, '
|
|
elif arg_type:
|
|
assert not arg_type.variants
|
|
for memb in arg_type.members:
|
|
if memb.optional:
|
|
argstr += 'arg.has_%s, ' % c_name(memb.name)
|
|
argstr += 'arg.%s, ' % c_name(memb.name)
|
|
|
|
lhs = ''
|
|
if ret_type:
|
|
lhs = 'retval = '
|
|
|
|
ret = mcgen('''
|
|
|
|
%(lhs)sqmp_%(c_name)s(%(args)s&err);
|
|
error_propagate(errp, err);
|
|
''',
|
|
c_name=c_name(name), args=argstr, lhs=lhs)
|
|
if ret_type:
|
|
ret += mcgen('''
|
|
if (err) {
|
|
goto out;
|
|
}
|
|
|
|
qmp_marshal_output_%(c_name)s(retval, ret, errp);
|
|
''',
|
|
c_name=ret_type.c_name())
|
|
return ret
|
|
|
|
|
|
def gen_marshal_output(ret_type: QAPISchemaType) -> str:
|
|
return mcgen('''
|
|
|
|
static void qmp_marshal_output_%(c_name)s(%(c_type)s ret_in,
|
|
QObject **ret_out, Error **errp)
|
|
{
|
|
Visitor *v;
|
|
|
|
v = qobject_output_visitor_new(ret_out);
|
|
if (visit_type_%(c_name)s(v, "unused", &ret_in, errp)) {
|
|
visit_complete(v, ret_out);
|
|
}
|
|
visit_free(v);
|
|
v = qapi_dealloc_visitor_new();
|
|
visit_type_%(c_name)s(v, "unused", &ret_in, NULL);
|
|
visit_free(v);
|
|
}
|
|
''',
|
|
c_type=ret_type.c_type(), c_name=ret_type.c_name())
|
|
|
|
|
|
def build_marshal_proto(name: str) -> str:
|
|
return ('void qmp_marshal_%s(QDict *args, QObject **ret, Error **errp)'
|
|
% c_name(name))
|
|
|
|
|
|
def gen_marshal_decl(name: str) -> str:
|
|
return mcgen('''
|
|
%(proto)s;
|
|
''',
|
|
proto=build_marshal_proto(name))
|
|
|
|
|
|
def gen_marshal(name: str,
|
|
arg_type: Optional[QAPISchemaObjectType],
|
|
boxed: bool,
|
|
ret_type: Optional[QAPISchemaType]) -> str:
|
|
have_args = boxed or (arg_type and not arg_type.is_empty())
|
|
if have_args:
|
|
assert arg_type is not None
|
|
arg_type_c_name = arg_type.c_name()
|
|
|
|
ret = mcgen('''
|
|
|
|
%(proto)s
|
|
{
|
|
Error *err = NULL;
|
|
bool ok = false;
|
|
Visitor *v;
|
|
''',
|
|
proto=build_marshal_proto(name))
|
|
|
|
if ret_type:
|
|
ret += mcgen('''
|
|
%(c_type)s retval;
|
|
''',
|
|
c_type=ret_type.c_type())
|
|
|
|
if have_args:
|
|
ret += mcgen('''
|
|
%(c_name)s arg = {0};
|
|
''',
|
|
c_name=arg_type_c_name)
|
|
|
|
ret += mcgen('''
|
|
|
|
v = qobject_input_visitor_new(QOBJECT(args));
|
|
if (!visit_start_struct(v, NULL, NULL, 0, errp)) {
|
|
goto out;
|
|
}
|
|
''')
|
|
|
|
if have_args:
|
|
ret += mcgen('''
|
|
if (visit_type_%(c_arg_type)s_members(v, &arg, errp)) {
|
|
ok = visit_check_struct(v, errp);
|
|
}
|
|
''',
|
|
c_arg_type=arg_type_c_name)
|
|
else:
|
|
ret += mcgen('''
|
|
ok = visit_check_struct(v, errp);
|
|
''')
|
|
|
|
ret += mcgen('''
|
|
visit_end_struct(v, NULL);
|
|
if (!ok) {
|
|
goto out;
|
|
}
|
|
''')
|
|
|
|
ret += gen_call(name, arg_type, boxed, ret_type)
|
|
|
|
ret += mcgen('''
|
|
|
|
out:
|
|
visit_free(v);
|
|
''')
|
|
|
|
ret += mcgen('''
|
|
v = qapi_dealloc_visitor_new();
|
|
visit_start_struct(v, NULL, NULL, 0, NULL);
|
|
''')
|
|
|
|
if have_args:
|
|
ret += mcgen('''
|
|
visit_type_%(c_arg_type)s_members(v, &arg, NULL);
|
|
''',
|
|
c_arg_type=arg_type_c_name)
|
|
|
|
ret += mcgen('''
|
|
visit_end_struct(v, NULL);
|
|
visit_free(v);
|
|
''')
|
|
|
|
ret += mcgen('''
|
|
}
|
|
''')
|
|
return ret
|
|
|
|
|
|
def gen_register_command(name: str,
|
|
success_response: bool,
|
|
allow_oob: bool,
|
|
allow_preconfig: bool,
|
|
coroutine: bool) -> str:
|
|
options = []
|
|
|
|
if not success_response:
|
|
options += ['QCO_NO_SUCCESS_RESP']
|
|
if allow_oob:
|
|
options += ['QCO_ALLOW_OOB']
|
|
if allow_preconfig:
|
|
options += ['QCO_ALLOW_PRECONFIG']
|
|
if coroutine:
|
|
options += ['QCO_COROUTINE']
|
|
|
|
if not options:
|
|
options = ['QCO_NO_OPTIONS']
|
|
|
|
ret = mcgen('''
|
|
qmp_register_command(cmds, "%(name)s",
|
|
qmp_marshal_%(c_name)s, %(opts)s);
|
|
''',
|
|
name=name, c_name=c_name(name),
|
|
opts=" | ".join(options))
|
|
return ret
|
|
|
|
|
|
class QAPISchemaGenCommandVisitor(QAPISchemaModularCVisitor):
|
|
def __init__(self, prefix: str):
|
|
super().__init__(
|
|
prefix, 'qapi-commands',
|
|
' * Schema-defined QAPI/QMP commands', None, __doc__)
|
|
self._visited_ret_types: Dict[QAPIGenC, Set[QAPISchemaType]] = {}
|
|
|
|
def _begin_user_module(self, name: str) -> None:
|
|
self._visited_ret_types[self._genc] = set()
|
|
commands = self._module_basename('qapi-commands', name)
|
|
types = self._module_basename('qapi-types', name)
|
|
visit = self._module_basename('qapi-visit', name)
|
|
self._genc.add(mcgen('''
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/visitor.h"
|
|
#include "qapi/qmp/qdict.h"
|
|
#include "qapi/qobject-output-visitor.h"
|
|
#include "qapi/qobject-input-visitor.h"
|
|
#include "qapi/dealloc-visitor.h"
|
|
#include "qapi/error.h"
|
|
#include "%(visit)s.h"
|
|
#include "%(commands)s.h"
|
|
|
|
''',
|
|
commands=commands, visit=visit))
|
|
self._genh.add(mcgen('''
|
|
#include "%(types)s.h"
|
|
|
|
''',
|
|
types=types))
|
|
|
|
def visit_begin(self, schema: QAPISchema) -> None:
|
|
self._add_module('./init', ' * QAPI Commands initialization')
|
|
self._genh.add(mcgen('''
|
|
#include "qapi/qmp/dispatch.h"
|
|
|
|
void %(c_prefix)sqmp_init_marshal(QmpCommandList *cmds);
|
|
''',
|
|
c_prefix=c_name(self._prefix, protect=False)))
|
|
self._genc.add(mcgen('''
|
|
#include "qemu/osdep.h"
|
|
#include "%(prefix)sqapi-commands.h"
|
|
#include "%(prefix)sqapi-init-commands.h"
|
|
|
|
void %(c_prefix)sqmp_init_marshal(QmpCommandList *cmds)
|
|
{
|
|
QTAILQ_INIT(cmds);
|
|
|
|
''',
|
|
prefix=self._prefix,
|
|
c_prefix=c_name(self._prefix, protect=False)))
|
|
|
|
def visit_end(self) -> None:
|
|
with self._temp_module('./init'):
|
|
self._genc.add(mcgen('''
|
|
}
|
|
'''))
|
|
|
|
def visit_command(self,
|
|
name: str,
|
|
info: Optional[QAPISourceInfo],
|
|
ifcond: List[str],
|
|
features: List[QAPISchemaFeature],
|
|
arg_type: Optional[QAPISchemaObjectType],
|
|
ret_type: Optional[QAPISchemaType],
|
|
gen: bool,
|
|
success_response: bool,
|
|
boxed: bool,
|
|
allow_oob: bool,
|
|
allow_preconfig: bool,
|
|
coroutine: bool) -> None:
|
|
if not gen:
|
|
return
|
|
# FIXME: If T is a user-defined type, the user is responsible
|
|
# for making this work, i.e. to make T's condition the
|
|
# conjunction of the T-returning commands' conditions. If T
|
|
# is a built-in type, this isn't possible: the
|
|
# qmp_marshal_output_T() will be generated unconditionally.
|
|
if ret_type and ret_type not in self._visited_ret_types[self._genc]:
|
|
self._visited_ret_types[self._genc].add(ret_type)
|
|
with ifcontext(ret_type.ifcond,
|
|
self._genh, self._genc):
|
|
self._genc.add(gen_marshal_output(ret_type))
|
|
with ifcontext(ifcond, self._genh, self._genc):
|
|
self._genh.add(gen_command_decl(name, arg_type, boxed, ret_type))
|
|
self._genh.add(gen_marshal_decl(name))
|
|
self._genc.add(gen_marshal(name, arg_type, boxed, ret_type))
|
|
with self._temp_module('./init'):
|
|
with ifcontext(ifcond, self._genh, self._genc):
|
|
self._genc.add(gen_register_command(name, success_response,
|
|
allow_oob, allow_preconfig,
|
|
coroutine))
|
|
|
|
|
|
def gen_commands(schema: QAPISchema,
|
|
output_dir: str,
|
|
prefix: str) -> None:
|
|
vis = QAPISchemaGenCommandVisitor(prefix)
|
|
schema.visit(vis)
|
|
vis.write(output_dir)
|