From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 8FB0EC47404 for ; Fri, 11 Oct 2019 16:50:18 +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 632D2206CD for ; Fri, 11 Oct 2019 16:50:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 632D2206CD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:54158 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIy7M-0006DB-Td for qemu-devel@archiver.kernel.org; Fri, 11 Oct 2019 12:50:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36880) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIxR9-0006dN-Kc for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:06:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIxR6-0004m2-PZ for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:06:39 -0400 Received: from relay.sw.ru ([185.231.240.75]:48422) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIxR6-0004TB-GT for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:06:36 -0400 Received: from [10.94.3.0] (helo=kvm.qa.sw.ru) by relay.sw.ru with esmtp (Exim 4.92.2) (envelope-from ) id 1iIxQu-0003XG-IJ; Fri, 11 Oct 2019 19:06:24 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org Subject: [RFC v5 084/126] SLIRP: introduce ERRP_AUTO_PROPAGATE Date: Fri, 11 Oct 2019 19:05:10 +0300 Message-Id: <20191011160552.22907-85-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191011160552.22907-1-vsementsov@virtuozzo.com> References: <20191011160552.22907-1-vsementsov@virtuozzo.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 185.231.240.75 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: Kevin Wolf , vsementsov@virtuozzo.com, Jan Kiszka , Jason Wang , armbru@redhat.com, Greg Kurz , Samuel Thibault Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" If we want to add some info to errp (by error_prepend() or error_append_hint()), we must use the ERRP_AUTO_PROPAGATE macro. Otherwise, this info will not be added when errp == &fatal_err (the program will exit prior to the error_append_hint() or error_prepend() call). Fix such cases. If we want to check error after errp-function call, we need to introduce local_err and than propagate it to errp. Instead, use ERRP_AUTO_PROPAGATE macro, benefits are: 1. No need of explicit error_propagate call 2. No need of explicit local_err variable: use errp directly 3. ERRP_AUTO_PROPAGATE leaves errp as is if it's not NULL or &error_fatel, this means that we don't break error_abort (we'll abort on error_set, not on error_propagate) This commit (together with its neighbors) was generated by for f in $(git grep -l errp \*.[ch]); do \ spatch --sp-file scripts/coccinelle/auto-propagated-errp.cocci \ --macro-file scripts/cocci-macro-file.h --in-place --no-show-diff $f; \ done; then fix a bit of compilation problems: coccinelle for some reason leaves several f() { ... goto out; ... out: } patterns, with "out:" at function end. then ./python/commit-per-subsystem.py MAINTAINERS "$(< auto-msg)" (auto-msg was a file with this commit message) Still, for backporting it may be more comfortable to use only the first command and then do one huge commit. Reported-by: Kevin Wolf Reported-by: Greg Kurz Signed-off-by: Vladimir Sementsov-Ogievskiy --- net/slirp.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/net/slirp.c b/net/slirp.c index c4334ee876..cbde9ba2a9 100644 --- a/net/slirp.c +++ b/net/slirp.c @@ -941,6 +941,7 @@ static ssize_t guestfwd_write(const void *buf, size_t len, void *chr) static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) { + ERRP_AUTO_PROPAGATE(); /* TODO: IPv6 */ struct in_addr server = { .s_addr = 0 }; struct GuestFwd *fwd; @@ -979,7 +980,6 @@ static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) return -1; } } else { - Error *err = NULL; /* * FIXME: sure we want to support implicit * muxed monitors here? @@ -993,9 +993,8 @@ static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) } fwd = g_new(struct GuestFwd, 1); - qemu_chr_fe_init(&fwd->hd, chr, &err); - if (err) { - error_propagate(errp, err); + qemu_chr_fe_init(&fwd->hd, chr, errp); + if (*errp) { object_unparent(OBJECT(chr)); g_free(fwd); return -1; -- 2.21.0