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Re: [PATCH v2 5/9] qapi: Generalize struct member policy checking
From: |
Markus Armbruster |
Subject: |
Re: [PATCH v2 5/9] qapi: Generalize struct member policy checking |
Date: |
Fri, 29 Oct 2021 16:01:41 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) |
Philippe Mathieu-Daudé <philmd@redhat.com> writes:
> On 10/28/21 12:25, Markus Armbruster wrote:
>> The generated visitor functions call visit_deprecated_accept() and
>> visit_deprecated() when visiting a struct member with special feature
>> flag 'deprecated'. This makes the feature flag visible to the actual
>> visitors. I want to make feature flag 'unstable' visible there as
>> well, so I can add policy for it.
>>
>> To let me make it visible, replace these functions by
>> visit_policy_reject() and visit_policy_skip(), which take the member's
>> special features as an argument. Note that the new functions have the
>> opposite sense, i.e. the return value flips.
>>
>> Signed-off-by: Markus Armbruster <armbru@redhat.com>
>> ---
>> include/qapi/visitor-impl.h | 6 ++++--
>> include/qapi/visitor.h | 17 +++++++++++++----
>> qapi/qapi-forward-visitor.c | 16 +++++++++-------
>> qapi/qapi-visit-core.c | 22 ++++++++++++----------
>> qapi/qobject-input-visitor.c | 15 ++++++++++-----
>> qapi/qobject-output-visitor.c | 9 ++++++---
>> qapi/trace-events | 4 ++--
>> scripts/qapi/visit.py | 14 +++++++-------
>> 8 files changed, 63 insertions(+), 40 deletions(-)
>
>> -static bool qobject_input_deprecated_accept(Visitor *v, const char *name,
>> - Error **errp)
>> +static bool qobject_input_policy_reject(Visitor *v, const char *name,
>> + unsigned special_features,
>> + Error **errp)
>> {
>> + if (!(special_features & 1u << QAPI_DEPRECATED)) {
>> + return false;
>> + }
>> +
>> switch (v->compat_policy.deprecated_input) {
>> case COMPAT_POLICY_INPUT_ACCEPT:
>> - return true;
>> + return false;
>> case COMPAT_POLICY_INPUT_REJECT:
>> error_setg(errp, "Deprecated parameter '%s' disabled by policy",
>> name);
>> - return false;
>> + return true;
>> case COMPAT_POLICY_INPUT_CRASH:
>
> Clearer as:
>
> abort();
> default:
> g_assert_not_reached();
Maybe, but making it so has nothing to do with this patch. It could
perhaps be done in PATCH 8, or in a followup patch.
> Otherwise,
> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Okay to tack your R-by to the unmodified patch?
Thanks!
>
>> default:
>> abort();
- [PATCH v2 4/9] qapi: Tools for sets of special feature flags in generated code, (continued)
- [PATCH v2 4/9] qapi: Tools for sets of special feature flags in generated code, Markus Armbruster, 2021/10/28
- [PATCH v2 3/9] qapi: Eliminate QCO_NO_OPTIONS for a slight simplification, Markus Armbruster, 2021/10/28
- [PATCH v2 7/9] qapi: Generalize enum member policy checking, Markus Armbruster, 2021/10/28
- [PATCH v2 5/9] qapi: Generalize struct member policy checking, Markus Armbruster, 2021/10/28
- Re: [PATCH v2 5/9] qapi: Generalize struct member policy checking, Eric Blake, 2021/10/29
[PATCH v2 1/9] qapi: New special feature flag "unstable", Markus Armbruster, 2021/10/28
[PATCH v2 2/9] qapi: Mark unstable QMP parts with feature 'unstable', Markus Armbruster, 2021/10/28
[PATCH v2 6/9] qapi: Generalize command policy checking, Markus Armbruster, 2021/10/28