From patchwork Fri Jan 29 13:48:51 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 8163411 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 3734C9F440 for ; Fri, 29 Jan 2016 13:55:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5819A201C8 for ; Fri, 29 Jan 2016 13:55:04 +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 68DC9201ED for ; Fri, 29 Jan 2016 13:55:02 +0000 (UTC) Received: from localhost ([::1]:34267 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aP9Vt-0005q6-S4 for patchwork-qemu-devel@patchwork.kernel.org; Fri, 29 Jan 2016 08:55:01 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41451) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aP9QI-0003bF-VC for qemu-devel@nongnu.org; Fri, 29 Jan 2016 08:49:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aP9QH-0001KJ-Ga for qemu-devel@nongnu.org; Fri, 29 Jan 2016 08:49:14 -0500 Received: from mx1.redhat.com ([209.132.183.28]:52230) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aP9QH-0001KA-7l for qemu-devel@nongnu.org; Fri, 29 Jan 2016 08:49:13 -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 CE79BC1C7B84; Fri, 29 Jan 2016 13:49:12 +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 u0TDn5FP019157; Fri, 29 Jan 2016 08:49:12 -0500 From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 29 Jan 2016 06:48:51 -0700 Message-Id: <1454075341-13658-16-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> MIME-Version: 1.0 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: marcandre.lureau@redhat.com, armbru@redhat.com, Michael Roth Subject: [Qemu-devel] [PATCH v10 15/25] qapi: Consolidate visitor small integer callbacks 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 Commit 4e27e819 introduced optional visitor callbacks for all sorts of int types, but no visitor has supplied any of the callbacks for sizes less than 64 bits. In other words, the generic implementation based on using type_[u]int64() followed by bounds-checking works just fine. In the interest of simplicity, it's easier to make the visitor callback interface not have to worry about the other sizes. Adding some helper functions minimizes the boilerplate required to correct FIXMEs added earlier with regards to questionable reuse of errp, particularly now that we can guarantee from a single file audit that value is unchanged if an error is set. Signed-off-by: Eric Blake Reviewed-by: Marc-André Lureau --- v10: tweak copyright line, rebase to earlier changes v9: hoist some of visitor-impl.h changes into 9/35 and 10/35 v8: no change v7: further factor out helper functions that eliminate the questionable errp reuse v6: split off from v5 23/46 original version also appeared in v6-v9 of subset D --- include/qapi/visitor-impl.h | 8 +-- qapi/qapi-visit-core.c | 158 +++++++++++++++++--------------------------- 2 files changed, 60 insertions(+), 106 deletions(-) diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h index 92c4bcb..29e2c08 100644 --- a/include/qapi/visitor-impl.h +++ b/include/qapi/visitor-impl.h @@ -1,7 +1,7 @@ /* * Core Definitions for QAPI Visitor implementations * - * Copyright (C) 2012 Red Hat, Inc. + * Copyright (C) 2012-2016 Red Hat, Inc. * * Author: Paolo Bonizni * @@ -56,12 +56,6 @@ struct Visitor /* May be NULL; most useful for input visitors. */ void (*optional)(Visitor *v, bool *present, const char *name); - void (*type_uint8)(Visitor *v, uint8_t *obj, const char *name, Error **errp); - void (*type_uint16)(Visitor *v, uint16_t *obj, const char *name, Error **errp); - void (*type_uint32)(Visitor *v, uint32_t *obj, const char *name, Error **errp); - void (*type_int8)(Visitor *v, int8_t *obj, const char *name, Error **errp); - void (*type_int16)(Visitor *v, int16_t *obj, const char *name, Error **errp); - void (*type_int32)(Visitor *v, int32_t *obj, const char *name, Error **errp); bool (*start_union)(Visitor *v, bool data_present, Error **errp); }; diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c index ac5a861..d65521f 100644 --- a/qapi/qapi-visit-core.c +++ b/qapi/qapi-visit-core.c @@ -94,129 +94,89 @@ void visit_type_int(Visitor *v, int64_t *obj, const char *name, Error **errp) v->type_int64(v, obj, name, errp); } +static void visit_type_uintN(Visitor *v, uint64_t *obj, const char *name, + uint64_t max, const char *type, Error **errp) +{ + Error *err = NULL; + uint64_t value = *obj; + + v->type_uint64(v, &value, name, &err); + if (err) { + error_propagate(errp, err); + } else if (value > max) { + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, + name ? name : "null", type); + } else { + *obj = value; + } +} + void visit_type_uint8(Visitor *v, uint8_t *obj, const char *name, Error **errp) { - uint64_t value; - - if (v->type_uint8) { - v->type_uint8(v, obj, name, errp); - } else { - value = *obj; - v->type_uint64(v, &value, name, errp); - if (value > UINT8_MAX) { - /* FIXME questionable reuse of errp if callback changed - value on error */ - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, - name ? name : "null", "uint8_t"); - return; - } - *obj = value; - } + uint64_t value = *obj; + visit_type_uintN(v, &value, name, UINT8_MAX, "uint8_t", errp); + *obj = value; } -void visit_type_uint16(Visitor *v, uint16_t *obj, const char *name, Error **errp) +void visit_type_uint16(Visitor *v, uint16_t *obj, const char *name, + Error **errp) { - uint64_t value; - - if (v->type_uint16) { - v->type_uint16(v, obj, name, errp); - } else { - value = *obj; - v->type_uint64(v, &value, name, errp); - if (value > UINT16_MAX) { - /* FIXME questionable reuse of errp if callback changed - value on error */ - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, - name ? name : "null", "uint16_t"); - return; - } - *obj = value; - } + uint64_t value = *obj; + visit_type_uintN(v, &value, name, UINT16_MAX, "uint16_t", errp); + *obj = value; } -void visit_type_uint32(Visitor *v, uint32_t *obj, const char *name, Error **errp) +void visit_type_uint32(Visitor *v, uint32_t *obj, const char *name, + Error **errp) { - uint64_t value; - - if (v->type_uint32) { - v->type_uint32(v, obj, name, errp); - } else { - value = *obj; - v->type_uint64(v, &value, name, errp); - if (value > UINT32_MAX) { - /* FIXME questionable reuse of errp if callback changed - value on error */ - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, - name ? name : "null", "uint32_t"); - return; - } - *obj = value; - } + uint64_t value = *obj; + visit_type_uintN(v, &value, name, UINT32_MAX, "uint32_t", errp); + *obj = value; } -void visit_type_uint64(Visitor *v, uint64_t *obj, const char *name, Error **errp) +void visit_type_uint64(Visitor *v, uint64_t *obj, const char *name, + Error **errp) { v->type_uint64(v, obj, name, errp); } +static void visit_type_intN(Visitor *v, int64_t *obj, const char *name, + int64_t min, int64_t max, const char *type, + Error **errp) +{ + Error *err = NULL; + int64_t value = *obj; + + v->type_int64(v, &value, name, &err); + if (err) { + error_propagate(errp, err); + } else if (value < min || value > max) { + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, + name ? name : "null", type); + } else { + *obj = value; + } +} + void visit_type_int8(Visitor *v, int8_t *obj, const char *name, Error **errp) { - int64_t value; - - if (v->type_int8) { - v->type_int8(v, obj, name, errp); - } else { - value = *obj; - v->type_int64(v, &value, name, errp); - if (value < INT8_MIN || value > INT8_MAX) { - /* FIXME questionable reuse of errp if callback changed - value on error */ - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, - name ? name : "null", "int8_t"); - return; - } - *obj = value; - } + int64_t value = *obj; + visit_type_intN(v, &value, name, INT8_MIN, INT8_MAX, "int8_t", errp); + *obj = value; } void visit_type_int16(Visitor *v, int16_t *obj, const char *name, Error **errp) { - int64_t value; - - if (v->type_int16) { - v->type_int16(v, obj, name, errp); - } else { - value = *obj; - v->type_int64(v, &value, name, errp); - if (value < INT16_MIN || value > INT16_MAX) { - /* FIXME questionable reuse of errp if callback changed - value on error */ - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, - name ? name : "null", "int16_t"); - return; - } - *obj = value; - } + int64_t value = *obj; + visit_type_intN(v, &value, name, INT16_MIN, INT16_MAX, "int16_t", errp); + *obj = value; } void visit_type_int32(Visitor *v, int32_t *obj, const char *name, Error **errp) { - int64_t value; - - if (v->type_int32) { - v->type_int32(v, obj, name, errp); - } else { - value = *obj; - v->type_int64(v, &value, name, errp); - if (value < INT32_MIN || value > INT32_MAX) { - /* FIXME questionable reuse of errp if callback changed - value on error */ - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, - name ? name : "null", "int32_t"); - return; - } - *obj = value; - } + int64_t value = *obj; + visit_type_intN(v, &value, name, INT32_MIN, INT32_MAX, "int32_t", errp); + *obj = value; } void visit_type_int64(Visitor *v, int64_t *obj, const char *name, Error **errp)