From patchwork Fri Feb 26 17:08:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 12107003 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51C3AC433DB for ; Fri, 26 Feb 2021 17:12:53 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id ACEEB64EFA for ; Fri, 26 Feb 2021 17:12:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ACEEB64EFA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36808 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lFgfb-0007eg-Nm for qemu-devel@archiver.kernel.org; Fri, 26 Feb 2021 12:12:51 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:37480) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lFgbP-0003oq-05 for qemu-devel@nongnu.org; Fri, 26 Feb 2021 12:08:32 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:20979) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lFgbF-0001bb-BZ for qemu-devel@nongnu.org; Fri, 26 Feb 2021 12:08:30 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614359300; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=E2RgQqc4LXJmIbtacf1EgV5LUJ345hehTop/uhGhYX0=; b=PYn//A4LJi5PmtDBnZUs/+6idimAQ3bFSIrPR9PSo8vSNN7+mDL7OE4y+LoiYiCEM9UN24 0kEXoQgGgEdwtw2+Q4ZF8F4bWN1iMqrO0wTvc9QY3GZ/Crek/r5YCsYxkovVJPYv5ki/sH AtABDMT1tIJEN/pJfpQxVhOxfiHkxd0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-31-uwOkV1X7M_qZHAU950pcoQ-1; Fri, 26 Feb 2021 12:08:18 -0500 X-MC-Unique: uwOkV1X7M_qZHAU950pcoQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 25DBC80403A for ; Fri, 26 Feb 2021 17:08:17 +0000 (UTC) Received: from virtlab511.virt.lab.eng.bos.redhat.com (virtlab511.virt.lab.eng.bos.redhat.com [10.19.152.198]) by smtp.corp.redhat.com (Postfix) with ESMTP id D745760BE5; Fri, 26 Feb 2021 17:08:16 +0000 (UTC) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PATCH v2] qemu-config: add error propagation to qemu_config_parse Date: Fri, 26 Feb 2021 12:08:16 -0500 Message-Id: <20210226170816.231173-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: armbru@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This enables some simplification of vl.c via error_fatal, and improves error messages. Before: Before: $ ./qemu-system-x86_64 -readconfig . qemu-system-x86_64: error reading file qemu-system-x86_64: -readconfig .: read config .: Invalid argument $ /usr/libexec/qemu-kvm -readconfig foo qemu-kvm: -readconfig foo: read config foo: No such file or directory After: $ ./qemu-system-x86_64 -readconfig . qemu-system-x86_64: -readconfig .: error reading file: Is a directory $ ./qemu-system-x86_64 -readconfig foo qemu-system-x86_64: -readconfig foo: Cannot read config file foo: No such file or directory Signed-off-by: Paolo Bonzini Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Markus Armbruster --- block/blkdebug.c | 3 +-- include/qemu/config-file.h | 5 +++-- softmmu/vl.c | 29 +++++++++++------------------ util/qemu-config.c | 23 ++++++++++++----------- 4 files changed, 27 insertions(+), 33 deletions(-) diff --git a/block/blkdebug.c b/block/blkdebug.c index 5fe6172da9..7eaa8a28bf 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -279,9 +279,8 @@ static int read_config(BDRVBlkdebugState *s, const char *filename, return -errno; } - ret = qemu_config_parse(f, config_groups, filename); + ret = qemu_config_parse(f, config_groups, filename, errp); if (ret < 0) { - error_setg(errp, "Could not parse blkdebug config file"); goto fail; } } diff --git a/include/qemu/config-file.h b/include/qemu/config-file.h index 29226107bd..8d3e53ae4d 100644 --- a/include/qemu/config-file.h +++ b/include/qemu/config-file.h @@ -11,9 +11,10 @@ void qemu_add_drive_opts(QemuOptsList *list); int qemu_global_option(const char *str); void qemu_config_write(FILE *fp); -int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname); +int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, + Error **errp); -int qemu_read_config_file(const char *filename); +int qemu_read_config_file(const char *filename, Error **errp); /* Parse QDict options as a replacement for a config file (allowing multiple enumerated (0..(n-1)) configuration "sections") */ diff --git a/softmmu/vl.c b/softmmu/vl.c index e67f91dd37..e80859c40d 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -2062,17 +2062,19 @@ static int global_init_func(void *opaque, QemuOpts *opts, Error **errp) return 0; } -static int qemu_read_default_config_file(void) +static void qemu_read_default_config_file(Error **errp) { + ERRP_GUARD(); int ret; g_autofree char *file = get_relocated_path(CONFIG_QEMU_CONFDIR "/qemu.conf"); - ret = qemu_read_config_file(file); - if (ret < 0 && ret != -ENOENT) { - return ret; + ret = qemu_read_config_file(file, errp); + if (ret < 0) { + if (ret == -ENOENT) { + error_free(*errp); + *errp = NULL; + } } - - return 0; } static int qemu_set_option(const char *str) @@ -2640,9 +2642,7 @@ void qemu_init(int argc, char **argv, char **envp) } if (userconfig) { - if (qemu_read_default_config_file() < 0) { - exit(1); - } + qemu_read_default_config_file(&error_fatal); } /* second pass of option parsing */ @@ -3330,15 +3330,8 @@ void qemu_init(int argc, char **argv, char **envp) qemu_plugin_opt_parse(optarg, &plugin_list); break; case QEMU_OPTION_readconfig: - { - int ret = qemu_read_config_file(optarg); - if (ret < 0) { - error_report("read config %s: %s", optarg, - strerror(-ret)); - exit(1); - } - break; - } + qemu_read_config_file(optarg, &error_fatal); + break; case QEMU_OPTION_spice: olist = qemu_find_opts_err("spice", NULL); if (!olist) { diff --git a/util/qemu-config.c b/util/qemu-config.c index e2a700b284..af89df109d 100644 --- a/util/qemu-config.c +++ b/util/qemu-config.c @@ -350,7 +350,7 @@ void qemu_config_write(FILE *fp) } /* Returns number of config groups on success, -errno on error */ -int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname) +int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error **errp) { char line[1024], group[64], id[64], arg[64], value[1024]; Location loc; @@ -375,7 +375,7 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname) /* group with id */ list = find_list(lists, group, &local_err); if (local_err) { - error_report_err(local_err); + error_propagate(errp, local_err); goto out; } opts = qemu_opts_create(list, id, 1, NULL); @@ -386,7 +386,7 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname) /* group without id */ list = find_list(lists, group, &local_err); if (local_err) { - error_report_err(local_err); + error_propagate(errp, local_err); goto out; } opts = qemu_opts_create(list, NULL, 0, &error_abort); @@ -398,21 +398,21 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname) sscanf(line, " %63s = \"\"", arg) == 1) { /* arg = value */ if (opts == NULL) { - error_report("no group defined"); + error_setg(errp, "no group defined"); goto out; } - if (!qemu_opt_set(opts, arg, value, &local_err)) { - error_report_err(local_err); + if (!qemu_opt_set(opts, arg, value, errp)) { goto out; } continue; } - error_report("parse error"); + error_setg(errp, "parse error"); goto out; } if (ferror(fp)) { - error_report("error reading file"); - goto out; + loc_pop(&loc); + error_setg_errno(errp, errno, "error reading file"); + return res; } res = count; out: @@ -420,16 +420,17 @@ out: return res; } -int qemu_read_config_file(const char *filename) +int qemu_read_config_file(const char *filename, Error **errp) { FILE *f = fopen(filename, "r"); int ret; if (f == NULL) { + error_setg_errno(errp, errno, "Cannot read config file %s", filename); return -errno; } - ret = qemu_config_parse(f, vm_config_groups, filename); + ret = qemu_config_parse(f, vm_config_groups, filename, errp); fclose(f); return ret; }