From patchwork Fri Jan 29 13:48:59 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 8163501 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5E949BEEE5 for ; Fri, 29 Jan 2016 14:00:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3CF74201B9 for ; Fri, 29 Jan 2016 14:00:31 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D76C2200D9 for ; Fri, 29 Jan 2016 14:00:29 +0000 (UTC) Received: from localhost ([::1]:34334 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aP9bB-0007gx-BK for patchwork-qemu-devel@patchwork.kernel.org; Fri, 29 Jan 2016 09:00:29 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41558) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aP9QR-0003tY-K5 for qemu-devel@nongnu.org; Fri, 29 Jan 2016 08:49:25 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aP9QP-0001Mc-D1 for qemu-devel@nongnu.org; Fri, 29 Jan 2016 08:49:23 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47436) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aP9QP-0001MQ-5h; Fri, 29 Jan 2016 08:49:21 -0500 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id 9D90449DB7; Fri, 29 Jan 2016 13:49:20 +0000 (UTC) Received: from red.redhat.com (ovpn-113-130.phx2.redhat.com [10.3.113.130]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u0TDn5FX019157; Fri, 29 Jan 2016 08:49:20 -0500 From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 29 Jan 2016 06:48:59 -0700 Message-Id: <1454075341-13658-24-git-send-email-eblake@redhat.com> In-Reply-To: <1454075341-13658-1-git-send-email-eblake@redhat.com> References: <1454075341-13658-1-git-send-email-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: armbru@redhat.com, Michael Roth , Alexander Graf , "open list:sPAPR" , marcandre.lureau@redhat.com, David Gibson Subject: [Qemu-devel] [PATCH v10 23/25] qapi: Drop unused error argument for list and implicit struct X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP No backend was setting an error when ending an implicit struct, or when iterating a list. Make the callers a bit easier to follow by making this a part of the contract, and removing the errp argument - callers can then unconditionally end an object as part of cleanup without having to think about whether a second error is dominated by a first, because there is no second error. A later patch will then tackle the larger task of splitting visit_end_struct(), which can indeed set an error (and that cleanup will also have the side-effect of removing the use of error_abort added here). Signed-off-by: Eric Blake --- v10: split out qmp input changes, also fix visit_next_list(), drop R-b v9: enhance commit message v8: no change v7: place earlier in series, rebase to earlier changes v6: new patch, split from RFC on v5 7/46 --- include/qapi/visitor.h | 8 +++++--- include/qapi/visitor-impl.h | 9 ++++++--- scripts/qapi-visit.py | 12 ++++-------- qapi/qapi-visit-core.c | 12 ++++++------ hw/ppc/spapr_drc.c | 6 +----- qapi/opts-visitor.c | 6 +++--- qapi/qapi-dealloc-visitor.c | 8 ++++---- qapi/qmp-input-visitor.c | 11 +++-------- qapi/qmp-output-visitor.c | 6 +++--- qapi/string-input-visitor.c | 8 +++----- qapi/string-output-visitor.c | 8 +++----- 11 files changed, 41 insertions(+), 53 deletions(-) diff --git a/include/qapi/visitor.h b/include/qapi/visitor.h index 997555d..5e581dc 100644 --- a/include/qapi/visitor.h +++ b/include/qapi/visitor.h @@ -1,6 +1,7 @@ /* * Core Definitions for QAPI Visitor Classes * + * Copyright (C) 2012-2016 Red Hat, Inc. * Copyright IBM, Corp. 2011 * * Authors: @@ -32,10 +33,11 @@ void visit_start_struct(Visitor *v, const char *name, void **obj, void visit_end_struct(Visitor *v, Error **errp); void visit_start_implicit_struct(Visitor *v, void **obj, size_t size, Error **errp); -void visit_end_implicit_struct(Visitor *v, Error **errp); +void visit_end_implicit_struct(Visitor *v); + void visit_start_list(Visitor *v, const char *name, Error **errp); -GenericList *visit_next_list(Visitor *v, GenericList **list, Error **errp); -void visit_end_list(Visitor *v, Error **errp); +GenericList *visit_next_list(Visitor *v, GenericList **list); +void visit_end_list(Visitor *v); /** * Check if an optional member @name of an object needs visiting. diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h index 337f999..ea252f8 100644 --- a/include/qapi/visitor-impl.h +++ b/include/qapi/visitor-impl.h @@ -24,11 +24,14 @@ struct Visitor void (*start_implicit_struct)(Visitor *v, void **obj, size_t size, Error **errp); - void (*end_implicit_struct)(Visitor *v, Error **errp); + /* May be NULL */ + void (*end_implicit_struct)(Visitor *v); void (*start_list)(Visitor *v, const char *name, Error **errp); - GenericList *(*next_list)(Visitor *v, GenericList **list, Error **errp); - void (*end_list)(Visitor *v, Error **errp); + /* Must be set */ + GenericList *(*next_list)(Visitor *v, GenericList **list); + /* Must be set */ + void (*end_list)(Visitor *v); void (*type_enum)(Visitor *v, const char *name, int *obj, const char *const strings[], Error **errp); diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py index 308000f..0fdcebc 100644 --- a/scripts/qapi-visit.py +++ b/scripts/qapi-visit.py @@ -62,7 +62,7 @@ static void visit_type_implicit_%(c_type)s(Visitor *v, %(c_type)s **obj, Error * visit_start_implicit_struct(v, (void **)obj, sizeof(%(c_type)s), &err); if (!err) { visit_type_%(c_type)s_fields(v, obj, errp); - visit_end_implicit_struct(v, &err); + visit_end_implicit_struct(v); } error_propagate(errp, err); } @@ -161,15 +161,13 @@ void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error } for (prev = (GenericList **)obj; - !err && (i = visit_next_list(v, prev, &err)) != NULL; + !err && (i = visit_next_list(v, prev)) != NULL; prev = &i) { %(c_name)s *native_i = (%(c_name)s *)i; visit_type_%(c_elt_type)s(v, NULL, &native_i->value, &err); } - error_propagate(errp, err); - err = NULL; - visit_end_list(v, &err); + visit_end_list(v); out: error_propagate(errp, err); } @@ -230,9 +228,7 @@ void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error "%(name)s"); } out_obj: - error_propagate(errp, err); - err = NULL; - visit_end_implicit_struct(v, &err); + visit_end_implicit_struct(v); out: error_propagate(errp, err); } diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c index 2999995..89599e8 100644 --- a/qapi/qapi-visit-core.c +++ b/qapi/qapi-visit-core.c @@ -38,10 +38,10 @@ void visit_start_implicit_struct(Visitor *v, void **obj, size_t size, } } -void visit_end_implicit_struct(Visitor *v, Error **errp) +void visit_end_implicit_struct(Visitor *v) { if (v->end_implicit_struct) { - v->end_implicit_struct(v, errp); + v->end_implicit_struct(v); } } @@ -50,14 +50,14 @@ void visit_start_list(Visitor *v, const char *name, Error **errp) v->start_list(v, name, errp); } -GenericList *visit_next_list(Visitor *v, GenericList **list, Error **errp) +GenericList *visit_next_list(Visitor *v, GenericList **list) { - return v->next_list(v, list, errp); + return v->next_list(v, list); } -void visit_end_list(Visitor *v, Error **errp) +void visit_end_list(Visitor *v) { - v->end_list(v, errp); + v->end_list(v); } bool visit_start_union(Visitor *v, bool data_present, Error **errp) diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c index 78d71e2..ffc2cd9 100644 --- a/hw/ppc/spapr_drc.c +++ b/hw/ppc/spapr_drc.c @@ -314,11 +314,7 @@ static void prop_get_fdt(Object *obj, Visitor *v, const char *name, return; } } - visit_end_list(v, &err); - if (err) { - error_propagate(errp, err); - return; - } + visit_end_list(v); break; } default: diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c index 6d4a91e..41d2d60 100644 --- a/qapi/opts-visitor.c +++ b/qapi/opts-visitor.c @@ -1,7 +1,7 @@ /* * Options Visitor * - * Copyright Red Hat, Inc. 2012, 2013 + * Copyright Red Hat, Inc. 2012-2016 * * Author: Laszlo Ersek * @@ -220,7 +220,7 @@ opts_start_list(Visitor *v, const char *name, Error **errp) static GenericList * -opts_next_list(Visitor *v, GenericList **list, Error **errp) +opts_next_list(Visitor *v, GenericList **list) { OptsVisitor *ov = to_ov(v); GenericList **link; @@ -269,7 +269,7 @@ opts_next_list(Visitor *v, GenericList **list, Error **errp) static void -opts_end_list(Visitor *v, Error **errp) +opts_end_list(Visitor *v) { OptsVisitor *ov = to_ov(v); diff --git a/qapi/qapi-dealloc-visitor.c b/qapi/qapi-dealloc-visitor.c index 49e7cf0..ec95066 100644 --- a/qapi/qapi-dealloc-visitor.c +++ b/qapi/qapi-dealloc-visitor.c @@ -1,6 +1,7 @@ /* * Dealloc Visitor * + * Copyright (C) 2012-2016 Red Hat, Inc. * Copyright IBM, Corp. 2011 * * Authors: @@ -83,7 +84,7 @@ static void qapi_dealloc_start_implicit_struct(Visitor *v, qapi_dealloc_push(qov, obj); } -static void qapi_dealloc_end_implicit_struct(Visitor *v, Error **errp) +static void qapi_dealloc_end_implicit_struct(Visitor *v) { QapiDeallocVisitor *qov = to_qov(v); void **obj = qapi_dealloc_pop(qov); @@ -98,8 +99,7 @@ static void qapi_dealloc_start_list(Visitor *v, const char *name, Error **errp) qapi_dealloc_push(qov, NULL); } -static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **listp, - Error **errp) +static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **listp) { GenericList *list = *listp; QapiDeallocVisitor *qov = to_qov(v); @@ -119,7 +119,7 @@ static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **listp, return NULL; } -static void qapi_dealloc_end_list(Visitor *v, Error **errp) +static void qapi_dealloc_end_list(Visitor *v) { QapiDeallocVisitor *qov = to_qov(v); void *obj = qapi_dealloc_pop(qov); diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c index ce3c0d6..a58695e 100644 --- a/qapi/qmp-input-visitor.c +++ b/qapi/qmp-input-visitor.c @@ -1,6 +1,7 @@ /* * Input Visitor * + * Copyright (C) 2012-2016 Red Hat, Inc. * Copyright IBM, Corp. 2011 * * Authors: @@ -153,10 +154,6 @@ static void qmp_input_start_implicit_struct(Visitor *v, void **obj, } } -static void qmp_input_end_implicit_struct(Visitor *v, Error **errp) -{ -} - static void qmp_input_start_list(Visitor *v, const char *name, Error **errp) { QmpInputVisitor *qiv = to_qiv(v); @@ -171,8 +168,7 @@ static void qmp_input_start_list(Visitor *v, const char *name, Error **errp) qmp_input_push(qiv, qobj, errp); } -static GenericList *qmp_input_next_list(Visitor *v, GenericList **list, - Error **errp) +static GenericList *qmp_input_next_list(Visitor *v, GenericList **list) { QmpInputVisitor *qiv = to_qiv(v); GenericList *entry; @@ -201,7 +197,7 @@ static GenericList *qmp_input_next_list(Visitor *v, GenericList **list, return entry; } -static void qmp_input_end_list(Visitor *v, Error **errp) +static void qmp_input_end_list(Visitor *v) { QmpInputVisitor *qiv = to_qiv(v); @@ -352,7 +348,6 @@ QmpInputVisitor *qmp_input_visitor_new(QObject *obj) v->visitor.start_struct = qmp_input_start_struct; v->visitor.end_struct = qmp_input_end_struct; v->visitor.start_implicit_struct = qmp_input_start_implicit_struct; - v->visitor.end_implicit_struct = qmp_input_end_implicit_struct; v->visitor.start_list = qmp_input_start_list; v->visitor.next_list = qmp_input_next_list; v->visitor.end_list = qmp_input_end_list; diff --git a/qapi/qmp-output-visitor.c b/qapi/qmp-output-visitor.c index db5e618..6ab2e04 100644 --- a/qapi/qmp-output-visitor.c +++ b/qapi/qmp-output-visitor.c @@ -1,6 +1,7 @@ /* * Core Definitions for QAPI/QMP Command Registry * + * Copyright (C) 2012-2016 Red Hat, Inc. * Copyright IBM, Corp. 2011 * * Authors: @@ -135,8 +136,7 @@ static void qmp_output_start_list(Visitor *v, const char *name, Error **errp) qmp_output_push(qov, list); } -static GenericList *qmp_output_next_list(Visitor *v, GenericList **listp, - Error **errp) +static GenericList *qmp_output_next_list(Visitor *v, GenericList **listp) { GenericList *list = *listp; QmpOutputVisitor *qov = to_qov(v); @@ -151,7 +151,7 @@ static GenericList *qmp_output_next_list(Visitor *v, GenericList **listp, return list ? list->next : NULL; } -static void qmp_output_end_list(Visitor *v, Error **errp) +static void qmp_output_end_list(Visitor *v) { QmpOutputVisitor *qov = to_qov(v); qmp_output_pop(qov); diff --git a/qapi/string-input-visitor.c b/qapi/string-input-visitor.c index 5347b61..dd15383 100644 --- a/qapi/string-input-visitor.c +++ b/qapi/string-input-visitor.c @@ -1,7 +1,7 @@ /* * String parsing visitor * - * Copyright Red Hat, Inc. 2012 + * Copyright Red Hat, Inc. 2012-2016 * * Author: Paolo Bonzini * @@ -138,8 +138,7 @@ start_list(Visitor *v, const char *name, Error **errp) } } -static GenericList * -next_list(Visitor *v, GenericList **list, Error **errp) +static GenericList *next_list(Visitor *v, GenericList **list) { StringInputVisitor *siv = to_siv(v); GenericList **link; @@ -177,8 +176,7 @@ next_list(Visitor *v, GenericList **list, Error **errp) return *link; } -static void -end_list(Visitor *v, Error **errp) +static void end_list(Visitor *v) { StringInputVisitor *siv = to_siv(v); siv->head = true; diff --git a/qapi/string-output-visitor.c b/qapi/string-output-visitor.c index 74de6b6..8ae7783 100644 --- a/qapi/string-output-visitor.c +++ b/qapi/string-output-visitor.c @@ -1,7 +1,7 @@ /* * String printing Visitor * - * Copyright Red Hat, Inc. 2012 + * Copyright Red Hat, Inc. 2012-2016 * * Author: Paolo Bonzini * @@ -275,8 +275,7 @@ start_list(Visitor *v, const char *name, Error **errp) sov->head = true; } -static GenericList * -next_list(Visitor *v, GenericList **list, Error **errp) +static GenericList *next_list(Visitor *v, GenericList **list) { StringOutputVisitor *sov = to_sov(v); GenericList *ret = NULL; @@ -302,8 +301,7 @@ next_list(Visitor *v, GenericList **list, Error **errp) return ret; } -static void -end_list(Visitor *v, Error **errp) +static void end_list(Visitor *v) { StringOutputVisitor *sov = to_sov(v);