From patchwork Sun Jul 14 07:48:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akihiko Odaki X-Patchwork-Id: 13732582 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4F453C3DA4B for ; Sun, 14 Jul 2024 07:49:58 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sStyp-00056I-22; Sun, 14 Jul 2024 03:49:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sStyl-00050P-Vr for qemu-devel@nongnu.org; Sun, 14 Jul 2024 03:49:09 -0400 Received: from mail-io1-xd35.google.com ([2607:f8b0:4864:20::d35]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sStyk-0007ep-EL for qemu-devel@nongnu.org; Sun, 14 Jul 2024 03:49:07 -0400 Received: by mail-io1-xd35.google.com with SMTP id ca18e2360f4ac-7f684af6af1so182689539f.2 for ; Sun, 14 Jul 2024 00:49:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20230601.gappssmtp.com; s=20230601; t=1720943345; x=1721548145; darn=nongnu.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=jiaYdGJdtPWsnfbPGe8XqhPOhb333O5wAJMSGqRo6p4=; b=T5UKe5fBpg9TLgDv9On6XoxnDE7/2W1YlEugvrnrI0/+5XklS5flkLkIzzhwayrqDT cXMpzQFboC9IFq+IDA+qJw3uN7rjNsKMsSnOXo7IRDjGlcJQ8TTcSNvRivvE25gssQV9 vXaRbQEPAi//ZwHzyNh37wjnMS18bxQv/Aqt9Xq+badvtZDA+HAihz5dLNwhlCOaQI2X 3aJaRCcAjxpZ+HDslk7GohSdP2kf9yj5Q6MqLzEyPKNcpuVPqDITp34Cgy1GtalYwj42 iYqiZ13sgDKRd9O8IhSjuT0OwIc8YYYkyF+NU1x4hpumMw2DtVLG/gKEWgifsXbPgv1o BpPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720943345; x=1721548145; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jiaYdGJdtPWsnfbPGe8XqhPOhb333O5wAJMSGqRo6p4=; b=PF7zwmwDysFcyjUUwVYwy0SybkVPTy4UTkmJ1SKjYAm5hs1t8PNnXiyw9aVcWndnua 59XFJv0AN85aaG2XMQQJOqQXy2yJzOgbWz53CQBlh37TaGZvFbPi5lSKaaiKp+APgGbh R9/skShB3nPfU6jIwERYNKaJNwGPgLHZanuyDWz5DfKuV+r34109xWqO+RNaxAte3p57 f2BDucF1QxQ5gBkrlp4wL10pW9dwcXWrjzZY4oMEDYxpSoG10e+jK9k9bGXCgh4JhrBr 5WedaYAFkboMHJR6apTwmnCHETq/xzFnYXyNy9PnsGUkAyOMXrfZw1a8yc/1EaoDCKCR vjeA== X-Gm-Message-State: AOJu0YxMT5QgV1NYtViF5KUrKHoZkfwbBP1E2R9HQupY49dGGb3Yi+6t Iy7y/YMSu+6zsfMmS86xH6mwVckNQGP3ms1kBF6X4tFW3+0N7col+CvBNEG1BQY= X-Google-Smtp-Source: AGHT+IGeyT9Io5WCPCLinwvALS4/z429E0AdR3OuBJQgaQ8pTSd42NePCPmMkJmKNnJowZIOUw0IaQ== X-Received: by 2002:a05:6e02:b49:b0:383:284:113 with SMTP id e9e14a558f8ab-38a57214449mr215364005ab.4.1720943345127; Sun, 14 Jul 2024 00:49:05 -0700 (PDT) Received: from localhost ([157.82.204.135]) by smtp.gmail.com with UTF8SMTPSA id d9443c01a7336-1fc0bb73f45sm19877665ad.13.2024.07.14.00.49.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 14 Jul 2024 00:49:04 -0700 (PDT) From: Akihiko Odaki Date: Sun, 14 Jul 2024 16:48:32 +0900 Subject: [PATCH v2 2/4] qapi: Do not consume a value when visit_type_enum() fails MIME-Version: 1.0 Message-Id: <20240714-rombar-v2-2-af1504ef55de@daynix.com> References: <20240714-rombar-v2-0-af1504ef55de@daynix.com> In-Reply-To: <20240714-rombar-v2-0-af1504ef55de@daynix.com> To: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , "Michael S. Tsirkin" , Marcel Apfelbaum , Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_Goa?= =?utf-8?q?ter?= , Paolo Bonzini , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Eduardo Habkost , Sriram Yagnaraman , Jason Wang , Keith Busch , Klaus Jensen , Markus Armbruster Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org, Akihiko Odaki X-Mailer: b4 0.14-dev-fd6e3 Received-SPF: none client-ip=2607:f8b0:4864:20::d35; envelope-from=akihiko.odaki@daynix.com; helo=mail-io1-xd35.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Consuming a value when visit_type_enum() fails makes it impossible to reinterpret the value with a different type. Signed-off-by: Akihiko Odaki --- include/qapi/visitor.h | 5 ----- qapi/opts-visitor.c | 5 ----- qapi/qapi-visit-core.c | 4 +++- 3 files changed, 3 insertions(+), 11 deletions(-) diff --git a/include/qapi/visitor.h b/include/qapi/visitor.h index b3ae3188edfb..8e841b26428b 100644 --- a/include/qapi/visitor.h +++ b/include/qapi/visitor.h @@ -513,11 +513,6 @@ void visit_set_policy(Visitor *v, CompatPolicy *policy); * is an input visitor. * * Return true on success, false on failure. - * - * May call visit_type_str() under the hood, and the enum visit may - * fail even if the corresponding string visit succeeded; this implies - * that an input visitor's visit_type_str() must have no unwelcome - * side effects. */ bool visit_type_enum(Visitor *v, const char *name, int *obj, const QEnumLookup *lookup, Error **errp); diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c index e9fad756e189..d83434b95a56 100644 --- a/qapi/opts-visitor.c +++ b/qapi/opts-visitor.c @@ -359,11 +359,6 @@ opts_type_str(Visitor *v, const char *name, char **obj, bool consume, return false; } *obj = g_strdup(opt->str ? opt->str : ""); - /* Note that we consume a string even if this is called as part of - * an enum visit that later fails because the string is not a - * valid enum value; this is harmless because tracking what gets - * consumed only matters to visit_end_struct() as the final error - * check if there were no other failures during the visit. */ if (consume) { processed(ov, name); } diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c index 89b52fc99202..1137d472290b 100644 --- a/qapi/qapi-visit-core.c +++ b/qapi/qapi-visit-core.c @@ -411,7 +411,7 @@ static bool input_type_enum(Visitor *v, const char *name, int *obj, int64_t value; g_autofree char *enum_str = NULL; - if (!visit_type_str(v, name, &enum_str, errp)) { + if (!visit_type_str_preserving(v, name, &enum_str, errp)) { return false; } @@ -430,6 +430,8 @@ static bool input_type_enum(Visitor *v, const char *name, int *obj, return false; } + enum_str = NULL; + visit_type_str(v, name, &enum_str, &error_abort); *obj = value; return true; }