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2022-12-14qapi dump: Elide redundant has_FOO in generated CMarkus Armbruster
The has_FOO for pointer-valued FOO are redundant, except for arrays. They are also a nuisance to work with. Recent commit "qapi: Start to elide redundant has_FOO in generated C" provided the means to elide them step by step. This is the step for qapi/dump.json. Said commit explains the transformation in more detail. The invariant violations mentioned there do not occur here. Cc: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20221104160712.3005652-14-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2022-12-14qapi crypto: Elide redundant has_FOO in generated CMarkus Armbruster
The has_FOO for pointer-valued FOO are redundant, except for arrays. They are also a nuisance to work with. Recent commit "qapi: Start to elide redundant has_FOO in generated C" provided the means to elide them step by step. This is the step for qapi/crypto.json. Said commit explains the transformation in more detail. The invariant violations mentioned there do not occur here. Cc: Daniel P. Berrangé" <berrange@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20221104160712.3005652-13-armbru@redhat.com>
2022-12-14qapi chardev: Elide redundant has_FOO in generated CMarkus Armbruster
The has_FOO for pointer-valued FOO are redundant, except for arrays. They are also a nuisance to work with. Recent commit "qapi: Start to elide redundant has_FOO in generated C" provided the means to elide them step by step. This is the step for qapi/char.json. Said commit explains the transformation in more detail. The invariant violations mentioned there do not occur here. Cc: Marc-André Lureau <marcandre.lureau@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20221104160712.3005652-12-armbru@redhat.com>
2022-12-14qapi block: Elide redundant has_FOO in generated CMarkus Armbruster
The has_FOO for pointer-valued FOO are redundant, except for arrays. They are also a nuisance to work with. Recent commit "qapi: Start to elide redundant has_FOO in generated C" provided the means to elide them step by step. This is the step for qapi/block*.json. Said commit explains the transformation in more detail. There is one instance of the invariant violation mentioned there: qcow2_signal_corruption() passes false, "" when node_name is an empty string. Take care to pass NULL then. The previous two commits cleaned up two more. Additionally, helper bdrv_latency_histogram_stats() loses its output parameters and returns a value instead. Cc: Kevin Wolf <kwolf@redhat.com> Cc: Hanna Reitz <hreitz@redhat.com> Cc: qemu-block@nongnu.org Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20221104160712.3005652-11-armbru@redhat.com> [Fixes for #ifndef LIBRBD_SUPPORTS_ENCRYPTION and MacOS squashed in]
2022-12-13qapi audio: Elide redundant has_FOO in generated CMarkus Armbruster
The has_FOO for pointer-valued FOO are redundant, except for arrays. They are also a nuisance to work with. Recent commit "qapi: Start to elide redundant has_FOO in generated C" provided the means to elide them step by step. This is the step for qapi/audio.json. Said commit explains the transformation in more detail. The invariant violations mentioned there do not occur here. Additionally, helper get_str() loses its @has_dst parameter. Cc: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20221104160712.3005652-8-armbru@redhat.com>
2022-12-13qapi acpi: Elide redundant has_FOO in generated CMarkus Armbruster
The has_FOO for pointer-valued FOO are redundant, except for arrays. They are also a nuisance to work with. Recent commit "qapi: Start to elide redundant has_FOO in generated C" provided the means to elide them step by step. This is the step for qapi/acpi.py. Said commit explains the transformation in more detail. The invariant violations mentioned there do not occur here. Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Ani Sinha <ani@anisinha.ca> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20221104160712.3005652-7-armbru@redhat.com>
2022-12-13qapi tests: Elide redundant has_FOO in generated CMarkus Armbruster
The has_FOO for pointer-valued FOO are redundant, except for arrays. They are also a nuisance to work with. Recent commit "qapi: Start to elide redundant has_FOO in generated C" provided the means to elide them step by step. This is the step for tests/qapi-schema/qapi-schema-test.json. Said commit explains the transformation in more detail. The invariant violations mentioned there do not occur here. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20221104160712.3005652-6-armbru@redhat.com>
2022-12-13qapi: Start to elide redundant has_FOO in generated CMarkus Armbruster
In QAPI, absent optional members are distinct from any present value. We thus represent an optional schema member FOO as two C members: a FOO with the member's type, and a bool has_FOO. Likewise for function arguments. However, has_FOO is actually redundant for a pointer-valued FOO, which can be null only when has_FOO is false, i.e. has_FOO == !!FOO. Except for arrays, where we a null FOO can also be a present empty array. The redundant has_FOO are a nuisance to work with. Improve the generator to elide them. Uses of has_FOO need to be replaced as follows. Tests of has_FOO become the equivalent comparison of FOO with null. For brevity, this is commonly done by implicit conversion to bool. Assignments to has_FOO get dropped. Likewise for arguments to has_FOO parameters. Beware: code may violate the invariant has_FOO == !!FOO before the transformation, and get away with it. The above transformation can then break things. Two cases: * Absent: if code ignores FOO entirely when !has_FOO (except for freeing it if necessary), even non-null / uninitialized FOO works. Such code is known to exist. * Present: if code ignores FOO entirely when has_FOO, even null FOO works. Such code should not exist. In both cases, replacing tests of has_FOO by FOO reverts their sense. We have to fix the value of FOO then. To facilitate review of the necessary updates to handwritten code, add means to opt out of this change, and opt out for all QAPI schema modules where the change requires updates to handwritten code. The next few commits will remove these opt-outs in reviewable chunks, then drop the means to opt out. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20221104160712.3005652-5-armbru@redhat.com>
2022-12-13qapi: Tidy up whitespace in generated codeMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20221104160712.3005652-3-armbru@redhat.com>
2022-07-13qapi: Avoid generating C identifier 'linux'zhenwei pi
'linux' is not usable as identifier, because C compilers targeting Linux predefine it as a macro expanding to 1. Add it to @polluted_words. 'unix' is already there. Suggested-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com> Message-Id: <20220707005602.696557-2-pizhenwei@bytedance.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
2022-05-16qapi/expr: Enforce feature naming rules againMarkus Armbruster
Commit e42648dccd "qapi/expr.py: Remove single-letter variable" accidentally removed the check for "only lower case letters and hyphens". Restore it. Fixes: e42648dccdd1defe8f35f247966cd7283f865cd6 Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20220510061645.3209195-2-armbru@redhat.com>
2022-04-21qapi-schema: support alternates with array typePaolo Bonzini
Detect array types as alternate branches, and turn the JSON list into a QAPISchemaArrayType. Array types in an alternate are represented with QTYPE_QLIST in the type field. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20220321164243.200569-2-pbonzini@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2022-02-28scripts/qapi: minor delintingJohn Snow
Get isort and pylint tools passing again. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20220211183650.2946895-1-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Comment explaining good-names-rgxs tweaked] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2022-01-27qapi: generate trace events by defaultVladimir Sementsov-Ogievskiy
We don't generate trace events for tests/ and qga/ because that it is not simple and not necessary. We have corresponding comments in both tests/meson.build and qga/meson.build. Still to not miss possible future qapi code generation call, and not to forget to enable trace events generation, let's enable it by default. So, turn option --gen-trace into opposite --no-trace-events and use new option only in tests/ and qga/ where we already have good comments why we don't generate trace events code. Note that this commit enables trace-events generation for qapi-gen.py call from tests/qapi-schema/meson.build and storage-daemon/meson.build. Still, both are kind of noop: tests/qapi-schema/ doesn't seem to generate any QMP command code and no .trace-events files anyway, storage-daemon/ uses common QMP command implementations and just generate empty .trace-events Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20220126161130.3240892-8-vsementsov@virtuozzo.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2022-01-27qapi/commands: Optionally generate trace for QMP commandsVladimir Sementsov-Ogievskiy
Add trace generation disabled by default and new option --gen-trace to enable it. The next commit will enable it for qapi/, but not for qga/ and tests/. Making it work for the latter two would involve some Meson hackery to ensure we generate the trace-events files before trace-tool uses them. Since we don't actually support tracing there, we'll bypass that problem. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20220126161130.3240892-4-vsementsov@virtuozzo.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Superfluous #include dropped] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2022-01-27qapi/commands: refactor error handling codeVladimir Sementsov-Ogievskiy
Move error_propagate() to if (err) and make "if (err)" block mandatory. This is to simplify further commit, which will bring trace events generation for QMP commands. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20220126161130.3240892-3-vsementsov@virtuozzo.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2022-01-27qapi/gen: Add FOO.trace-events output moduleVladimir Sementsov-Ogievskiy
We are going to generate trace events for QMP commands. We should generate both trace_*() function calls and trace-events files listing events for trace generator. So, add an output module FOO.trace-events for each FOO schema module. Since we're going to add trace events only to command marshallers, make the trace-events output optional, so we don't generate so many useless empty files. Currently nobody set add_trace_events to True, so new functionality is disabled. It will be enabled for QAPISchemaGenCommandVisitor in a further commit. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20220126161130.3240892-2-vsementsov@virtuozzo.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-29qapi: Extend -compat to set policy for unstable interfacesMarkus Armbruster
New option parameters unstable-input and unstable-output set policy for unstable interfaces just like deprecated-input and deprecated-output set policy for deprecated interfaces (see commit 6dd75472d5 "qemu-options: New -compat to set policy for deprecated interfaces"). This is intended for testing users of the management interfaces. It is experimental. For now, this covers only syntactic aspects of QMP, i.e. stuff tagged with feature 'unstable'. We may want to extend it to cover semantic aspects, or the command line. Note that there is no good way for management application to detect presence of these new option parameters: they are not visible output of query-qmp-schema or query-command-line-options. Tolerable, because it's meant for testing. If running with -compat fails, skip the test. Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: John Snow <jsnow@redhat.com> Message-Id: <20211028102520.747396-10-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> [Doc comments fixed up]
2021-10-29qapi: Generalize enum member policy checkingMarkus Armbruster
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>
2021-10-29qapi: Generalize command policy checkingMarkus Armbruster
The code to check command policy can see special feature flag 'deprecated' as command flag QCO_DEPRECATED. I want to make feature flag 'unstable' visible there as well, so I can add policy for it. To let me make it visible, add member @special_features (a bitset of QapiSpecialFeature) to QmpCommand, and adjust the generator to pass it through qmp_register_command(). Then replace "QCO_DEPRECATED in @flags" by QAPI_DEPRECATED in @special_features", and drop QCO_DEPRECATED. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: John Snow <jsnow@redhat.com> Message-Id: <20211028102520.747396-7-armbru@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2021-10-29qapi: Generalize struct member policy checkingMarkus Armbruster
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> Message-Id: <20211028102520.747396-6-armbru@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> [Unbreak forward visitor]
2021-10-29qapi: Tools for sets of special feature flags in generated codeMarkus Armbruster
New enum QapiSpecialFeature enumerates the special feature flags. New helper gen_special_features() returns code to represent a collection of special feature flags as a bitset. The next few commits will put them to use. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-Id: <20211028102520.747396-5-armbru@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-10-29qapi: Eliminate QCO_NO_OPTIONS for a slight simplificationMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-Id: <20211028102520.747396-4-armbru@redhat.com>
2021-10-27qapi: Implement deprecated-input={reject,crash} for enum valuesMarkus Armbruster
This copies the code implementing the policy from qapi/qmp-dispatch.c to qapi/qobject-input-visitor.c. Tolerable, but if we acquire more copies, we should look into factoring them out. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Tested-by: Peter Krempa <pkrempa@redhat.com> Acked-by: Peter Krempa <pkrempa@redhat.com> Message-Id: <20211025042405.3762351-5-armbru@redhat.com>
2021-10-27qapi: Add feature flags to enum membersMarkus Armbruster
This is quite similar to commit 84ab008687 "qapi: Add feature flags to struct members", only for enums instead of structs. Special feature flag 'deprecated' is silently ignored there. This is okay only because it will be implemented shortly. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20211025042405.3762351-3-armbru@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
2021-10-27qapi: Enable enum member introspection to show more than nameMarkus Armbruster
The next commit will add feature flags to enum members. There's a problem, though: query-qmp-schema shows an enum type's members as an array of member names (SchemaInfoEnum member @values). If it showed an array of objects with a name member, we could simply add more members to these objects. Since it's just strings, we can't. I can see three ways to correct this design mistake: 1. Do it the way we should have done it, plus compatibility goo. We want a ['SchemaInfoEnumMember'] member in SchemaInfoEnum. Since changing @values would be a compatibility break, add a new member @members instead. @values is now redundant. In my testing, output of qemu-system-x86_64's query-qmp-schema grows by 11% (18.5KiB). We can deprecate @values now and drop it later. This will break outmoded clients. Well-behaved clients such as libvirt are expected to break cleanly. 2. Like 1, but omit "boring" elements of @member, and empty @member. @values does not become redundant. @members augments it. Somewhat cumbersome, but output of query-qmp-schema grows only as we make enum members non-boring. There is nothing to deprecate here. 3. Versioned query-qmp-schema. query-qmp-schema provides either @values or @members. The QMP client can select which version it wants. There is no redundant output. We can deprecate old versions and eventually drop them. This will break outmoded clients. Breaking cleanly is easier than for 1. While 1 and 2 operate within the common rules for compatible evolution apply (section "Compatibility considerations" in docs/devel/qapi-code-gen.rst), 3 bypasses them. Attractive when operating within the rules is just too awkward. Not the case here. This commit implements 1. Libvirt developers prefer it. Deprecate @values in favour of @members. Since query-qmp-schema compatibility is pretty fundamental for management applications, an extended grace period is advised. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Tested-by: Peter Krempa <pkrempa@redhat.com> Acked-by: Peter Krempa <pkrempa@redhat.com> Message-Id: <20211025042405.3762351-2-armbru@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
2021-10-02qapi/parser: enable pylint checksJohn Snow
Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-14-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/parser: Silence too-few-public-methods warningJohn Snow
Eh. Not worth the fuss today. There are bigger fish to fry. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-13-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/parser: enable mypy checksJohn Snow
Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-12-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/parser: Add FIXME for consolidating JSON-related typesJohn Snow
The fix for this comment is forthcoming in a future commit, but this will keep me honest. The linting configuration in ./python/setup.cfg prohibits 'FIXME' comments. A goal of this long-running series is to move ./scripts/qapi to ./python/qemu/qapi so that the QAPI generator is regularly type-checked by GitLab CI. This comment is a time-bomb to force me to address this issue prior to that step. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-11-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/parser: add type hint annotations (QAPIDoc)John Snow
Annotations do not change runtime behavior. This commit consists of only annotations. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-10-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/parser: add import cycle workaroundJohn Snow
Adding static types causes a cycle in the QAPI generator: [schema -> expr -> parser -> schema]. It exists because the QAPIDoc class needs the names of types defined by the schema module, but the schema module needs to import both expr.py/parser.py to do its actual parsing. Ultimately, the layering violation is that parser.py should not have any knowledge of specifics of the Schema. QAPIDoc performs double-duty here both as a parser *and* as a finalized object that is part of the schema. In this patch, add the offending type hints alongside the workaround to avoid the cycle becoming a problem at runtime. See https://mypy.readthedocs.io/en/latest/runtime_troubles.html#import-cycles for more information on this workaround technique. I see three ultimate resolutions here: (1) Just keep this patch and use the TYPE_CHECKING trick to eliminate the cycle which is only present during static analysis. (2) Don't bother to annotate connect_member() et al, give them 'object' or 'Any'. I don't particularly like this, because it diminishes the usefulness of type hints for documentation purposes. Still, it's an extremely quick fix. (3) Reimplement doc <--> definition correlation directly in schema.py, integrating doc fields directly into QAPISchemaMember and relieving the QAPIDoc class of the responsibility. Users of the information would instead visit the members first and retrieve their documentation instead of the inverse operation -- visiting the documentation and retrieving their members. My preference is (3), but in the short-term (1) is the easiest way to have my cake (strong type hints) and eat it too (Not have import cycles). Do (1) for now, but plan for (3). Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-9-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/parser: Introduce NullSectionJohn Snow
Here's the weird bit. QAPIDoc generally expects -- virtually everywhere -- that it will always have a current section. The sole exception to this is in the case that end_comment() is called, which leaves us with *no* section. However, in this case, we also don't expect to actually ever mutate the comment contents ever again. NullSection is just a Null-object that allows us to maintain the invariant that we *always* have a current section, enforced by static typing -- allowing us to type that field as QAPIDoc.Section instead of the more ambiguous Optional[QAPIDoc.Section]. end_section is renamed to switch_section and now accepts as an argument the new section to activate, clarifying that no callers ever just unilaterally end a section; they only do so when starting a new section. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-8-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/parser: clarify _end_section() logicJohn Snow
The "if self._section" clause in end_section is mysterious: In which circumstances might we end a section when we don't have one? QAPIDoc always expects there to be a "current section", only except after a call to end_comment(). This actually *shouldn't* ever be 'None', so let's remove that logic so I don't wonder why it's like this again in three months. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-7-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/parser: remove FIXME comment from _append_body_lineJohn Snow
True, we do not check the validity of this symbol -- but we don't check the validity of definition names during parse, either -- that happens later, during the expr check. I don't want to introduce a dependency on expr.py:check_name_str here and introduce a cycle. Instead, rest assured that a documentation block is required for each definition. This requirement uses the names of each section to ensure that we fulfilled this requirement. e.g., let's say that block-core.json has a comment block for "Snapshot!Info" by accident. We'll see this error message: In file included from ../../qapi/block.json:8: ../../qapi/block-core.json: In struct 'SnapshotInfo': ../../qapi/block-core.json:38: documentation comment is for 'Snapshot!Info' That's a pretty decent error message. Now, let's say that we actually mangle it twice, identically: ../../qapi/block-core.json: In struct 'Snapshot!Info': ../../qapi/block-core.json:38: struct has an invalid name That's also pretty decent. If we forget to fix it in both places, we'll just be back to the first error. Therefore, let's just drop this FIXME and adjust the error message to not imply a more thorough check than is actually performed. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-6-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/parser: fix unused check_args_section argumentsJohn Snow
Pylint informs us we're not using these arguments. Oops, it's right. Correct the error message and remove the remaining unused parameter. Fix test output now that the error message is improved. Fixes: e151941d1b Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-4-jsnow@redhat.com> [Commit message formatting tweaked] Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/gen: use dict.items() to iterate over _modulesJohn Snow
New pylint warning. I could silence it, but this is the only occurrence in the entire tree, including everything in iotests/ and python/. Easier to just change this one instance. (The warning is emitted in cases where you are fetching the values anyway, so you may as well just take advantage of the iterator to avoid redundant lookups.) Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-3-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-10-02qapi/pylintrc: ignore 'consider-using-f-string' warningJohn Snow
Pylint 2.11.x adds this warning. We're not yet ready to pursue that conversion, so silence it for now. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210930205716.1148693-2-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2021-09-27qapi: Drop simple unionsMarkus Armbruster
Simple unions predate flat unions. Having both complicates the QAPI schema language and the QAPI generator. We haven't been using simple unions in new code for a long time, because they are less flexible and somewhat awkward on the wire. The previous commits eliminated simple union from the tree. Now drop them from the QAPI schema language entirely, and update mentions of "flat union" to just "union". Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20210917143134.412106-22-armbru@redhat.com>
2021-09-25qapi: Stop enforcing "type name should not end in 'Kind'Markus Armbruster
I'm about to convert simple unions to flat unions, then drop simple union support. The conversion involves making the implict enum types explicit. To reduce churn, I'd like to name them exactly like the implicit types they replace. However, these names are reserved for the generator's use. They won't be once simple unions are gone. Stop enforcing this naming rule now rather than then. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20210917143134.412106-3-armbru@redhat.com>
2021-09-08qapi: Fix bogus error for 'if': { 'not': '' }Markus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210908045428.2689093-6-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> [check_infix()'s type hint fixed]
2021-09-08qapi: Bury some unused code in class IndentationMarkus Armbruster
.__int__() has never been used. Drop it. .decrease() raises ArithmeticError when asked to decrease indentation level below zero. Nothing catches it. It's a programming error. Dumb down to assert. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210908045428.2689093-4-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2021-09-08qapi: Drop Indentation.__bool__()Markus Armbruster
Intentation.__bool__() is not worth its keep: it has just one user, which can just as well check .__str__() instead. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210908045428.2689093-3-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2021-09-08qapi: Fix a botched type annotationMarkus Armbruster
Mypy is unhappy: $ mypy --config-file=scripts/qapi/mypy.ini `git-ls-files scripts/qapi/\*py` scripts/qapi/common.py:208: error: Function is missing a return type annotation scripts/qapi/common.py:227: error: Returning Any from function declared to return "str" Messed up in commit ccea6a8637 "qapi: Factor common recursion out of cgen_ifcond(), docgen_ifcond()". Tidy up. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210908045428.2689093-2-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2021-09-03qapi: Tweak error messages for unknown / conflicting 'if' keysMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210831123809.1107782-13-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2021-09-03qapi: Tweak error messages for missing / conflicting meta-typeMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210831123809.1107782-12-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2021-09-03qapi: Use re.fullmatch() where appropriateMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210831123809.1107782-10-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2021-09-03qapi: Use "not COND" instead of "!COND" for generated documentationMarkus Armbruster
Generated documentation uses operators "and", "or", and "!". Change the latter to "not". Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210831123809.1107782-9-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2021-09-03qapi: Avoid redundant parens in code generated for conditionalsMarkus Armbruster
Commit 6cc2e4817f "qapi: introduce QAPISchemaIfCond.cgen()" caused a minor regression: redundant parenthesis. Subsequent commits eliminated of many of them, but not all. Get rid of the rest now. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210831123809.1107782-8-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2021-09-03qapi: Factor common recursion out of cgen_ifcond(), docgen_ifcond()Markus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210831123809.1107782-7-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>