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qapi: Generalize enum member policy checking 

The code to check enumeration value policy can see special feature
flag 'deprecated' in QEnumLookup member flags[value].  I want to make
feature flag 'unstable' visible there as well, so I can add policy for
it.

Instead of extending flags[], replace it by @special_features (a
bitset of QapiSpecialFeature), because that's how special features get
passed around elsewhere.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: John Snow <jsnow@redhat.com>
Message-Id: <20211028102520.747396-8-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
This commit is contained in:
Markus Armbruster 2021-10-28 12:25:18 +02:00
parent 6604e4757a
commit c868876043
3 changed files with 15 additions and 15 deletions
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5
include/qapi/util.h
View File

@ -15,12 +15,9 @@ typedef enum {
QAPI_DEPRECATED,
} QapiSpecialFeature;
/* QEnumLookup flags */
#define QAPI_ENUM_DEPRECATED 1
typedef struct QEnumLookup {
const char *const *array;
const unsigned char *const flags;
const unsigned char *const special_features;
const int size;
} QEnumLookup;

3
qapi/qapi-visit-core.c
View File

@ -408,7 +408,8 @@ static bool input_type_enum(Visitor *v, const char *name, int *obj,
return false;
}
if (lookup->flags && (lookup->flags[value] & QAPI_ENUM_DEPRECATED)) {
if (lookup->special_features
&& (lookup->special_features[value] & QAPI_DEPRECATED)) {
switch (v->compat_policy.deprecated_input) {
case COMPAT_POLICY_INPUT_ACCEPT:
break;

22
scripts/qapi/types.py
View File

@ -16,7 +16,7 @@ This work is licensed under the terms of the GNU GPL, version 2.
from typing import List, Optional
from .common import c_enum_const, c_name, mcgen
from .gen import QAPISchemaModularCVisitor, ifcontext
from .gen import QAPISchemaModularCVisitor, gen_special_features, ifcontext
from .schema import (
QAPISchema,
QAPISchemaEnumMember,
@ -39,7 +39,7 @@ def gen_enum_lookup(name: str,
members: List[QAPISchemaEnumMember],
prefix: Optional[str] = None) -> str:
max_index = c_enum_const(name, '_MAX', prefix)
flags = ''
feats = ''
ret = mcgen('''
const QEnumLookup %(c_name)s_lookup = {
@ -54,19 +54,21 @@ const QEnumLookup %(c_name)s_lookup = {
''',
index=index, name=memb.name)
ret += memb.ifcond.gen_endif()
if 'deprecated' in (f.name for f in memb.features):
flags += mcgen('''
[%(index)s] = QAPI_ENUM_DEPRECATED,
''',
index=index)
if flags:
special_features = gen_special_features(memb.features)
if special_features != '0':
feats += mcgen('''
[%(index)s] = %(special_features)s,
''',
index=index, special_features=special_features)
if feats:
ret += mcgen('''
},
.flags = (const unsigned char[%(max_index)s]) {
.special_features = (const unsigned char[%(max_index)s]) {
''',
max_index=max_index)
ret += flags
ret += feats
ret += mcgen('''
},