From nobody Sun Feb 8 14:52:16 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=1; a=rsa-sha256; t=1570814299; cv=none; d=zoho.com; s=zohoarc; b=RU7QA4eSxEQbI+mCbV6MwccgbaI1j3jHaa/g5/65WEZOQKwPrV6qsuRGC+cauSU5faX5PmMlcyVxcJ6yrah6Y/n2nNwkdLEAB0DNrXyOx1+n4cC6bcQB4gzSvGqjsr4YElyLxXoNC0BKRy1BywU/FA9zjd80f7C7pr6iMHl8iEw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1570814299; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=XAabjFwVnyFKAucCg6UHhmwUyE20B4zI5EYwTfAMCCU=; b=mXk/Ud68gJmeTXOnWn3cFz6iRy57OgF1wLhDjpsmH2AllG0hHI0yheaf1zv7gzGStam683LQWisEJwQQXgmdYenZogdCClqPzLIZFTm5vCfTsN6BpjBNAbvnDKNM9xsf1RT4EHlvxNFrnNd+yVrFJpywQd8L8Xg7OpKpndhaDsw= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 157081429978188.1939060050895; Fri, 11 Oct 2019 10:18:19 -0700 (PDT) Received: from localhost ([::1]:54528 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIyYU-00012B-0V for importer@patchew.org; Fri, 11 Oct 2019 13:18:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36804) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIxR7-0006ZK-Ez for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:06:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIxR4-0004ie-Bi for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:06:37 -0400 Received: from relay.sw.ru ([185.231.240.75]:48362) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIxR4-0004Pf-3f for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:06:34 -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 1iIxQs-0003XG-GX; Fri, 11 Oct 2019 19:06:22 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org Subject: [RFC v5 078/126] hostmem: introduce ERRP_AUTO_PROPAGATE Date: Fri, 11 Oct 2019 19:05:04 +0300 Message-Id: <20191011160552.22907-79-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: quoted-printable 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, Eduardo Habkost , armbru@redhat.com, Greg Kurz , Igor Mammedov Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" 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 =3D=3D &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 --- backends/hostmem-file.c | 21 ++++++++------------ backends/hostmem-memfd.c | 18 ++++++++---------- backends/hostmem.c | 41 ++++++++++++++++++---------------------- 3 files changed, 34 insertions(+), 46 deletions(-) diff --git a/backends/hostmem-file.c b/backends/hostmem-file.c index be64020746..4d03b9f33a 100644 --- a/backends/hostmem-file.c +++ b/backends/hostmem-file.c @@ -116,25 +116,22 @@ static void file_memory_backend_set_align(Object *o, = Visitor *v, const char *name, void *opaque, Error **errp) { + ERRP_AUTO_PROPAGATE(); HostMemoryBackend *backend =3D MEMORY_BACKEND(o); HostMemoryBackendFile *fb =3D MEMORY_BACKEND_FILE(o); - Error *local_err =3D NULL; uint64_t val; =20 if (host_memory_backend_mr_inited(backend)) { - error_setg(&local_err, "cannot change property '%s' of %s", + error_setg(errp, "cannot change property '%s' of %s", name, object_get_typename(o)); - goto out; + return; } =20 - visit_type_size(v, name, &val, &local_err); - if (local_err) { - goto out; + visit_type_size(v, name, &val, errp); + if (*errp) { + return; } fb->align =3D val; - - out: - error_propagate(errp, local_err); } =20 static bool file_memory_backend_get_pmem(Object *o, Error **errp) @@ -144,6 +141,7 @@ static bool file_memory_backend_get_pmem(Object *o, Err= or **errp) =20 static void file_memory_backend_set_pmem(Object *o, bool value, Error **er= rp) { + ERRP_AUTO_PROPAGATE(); HostMemoryBackend *backend =3D MEMORY_BACKEND(o); HostMemoryBackendFile *fb =3D MEMORY_BACKEND_FILE(o); =20 @@ -156,13 +154,10 @@ static void file_memory_backend_set_pmem(Object *o, b= ool value, Error **errp) =20 #ifndef CONFIG_LIBPMEM if (value) { - Error *local_err =3D NULL; - - error_setg(&local_err, + error_setg(errp, "Lack of libpmem support while setting the 'pmem=3Don'" " of %s. We can't ensure data persistence.", object_get_typename(o)); - error_propagate(errp, local_err); return; } #endif diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c index 26070b425e..1f0677e5b4 100644 --- a/backends/hostmem-memfd.c +++ b/backends/hostmem-memfd.c @@ -77,27 +77,25 @@ static void memfd_backend_set_hugetlbsize(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { + ERRP_AUTO_PROPAGATE(); HostMemoryBackendMemfd *m =3D MEMORY_BACKEND_MEMFD(obj); - Error *local_err =3D NULL; uint64_t value; =20 if (host_memory_backend_mr_inited(MEMORY_BACKEND(obj))) { - error_setg(&local_err, "cannot change property value"); - goto out; + error_setg(errp, "cannot change property value"); + return; } =20 - visit_type_size(v, name, &value, &local_err); - if (local_err) { - goto out; + visit_type_size(v, name, &value, errp); + if (*errp) { + return; } if (!value) { - error_setg(&local_err, "Property '%s.%s' doesn't take value '%" + error_setg(errp, "Property '%s.%s' doesn't take value '%" PRIu64 "'", object_get_typename(obj), name, value); - goto out; + return; } m->hugetlbsize =3D value; -out: - error_propagate(errp, local_err); } =20 static void diff --git a/backends/hostmem.c b/backends/hostmem.c index 6d333dc23c..7a3dd9d69b 100644 --- a/backends/hostmem.c +++ b/backends/hostmem.c @@ -53,29 +53,27 @@ static void host_memory_backend_set_size(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { + ERRP_AUTO_PROPAGATE(); HostMemoryBackend *backend =3D MEMORY_BACKEND(obj); - Error *local_err =3D NULL; uint64_t value; =20 if (host_memory_backend_mr_inited(backend)) { - error_setg(&local_err, "cannot change property %s of %s ", + error_setg(errp, "cannot change property %s of %s ", name, object_get_typename(obj)); - goto out; + return; } =20 - visit_type_size(v, name, &value, &local_err); - if (local_err) { - goto out; + visit_type_size(v, name, &value, errp); + if (*errp) { + return; } if (!value) { - error_setg(&local_err, + error_setg(errp, "property '%s' of %s doesn't take value '%" PRIu64 "'", name, object_get_typename(obj), value); - goto out; + return; } backend->size =3D value; -out: - error_propagate(errp, local_err); } =20 static void @@ -221,7 +219,7 @@ static bool host_memory_backend_get_prealloc(Object *ob= j, Error **errp) static void host_memory_backend_set_prealloc(Object *obj, bool value, Error **errp) { - Error *local_err =3D NULL; + ERRP_AUTO_PROPAGATE(); HostMemoryBackend *backend =3D MEMORY_BACKEND(obj); MachineState *ms =3D MACHINE(qdev_get_machine()); =20 @@ -243,9 +241,8 @@ static void host_memory_backend_set_prealloc(Object *ob= j, bool value, void *ptr =3D memory_region_get_ram_ptr(&backend->mr); uint64_t sz =3D memory_region_size(&backend->mr); =20 - os_mem_prealloc(fd, ptr, sz, ms->smp.cpus, &local_err); - if (local_err) { - error_propagate(errp, local_err); + os_mem_prealloc(fd, ptr, sz, ms->smp.cpus, errp); + if (*errp) { return; } backend->prealloc =3D true; @@ -311,17 +308,17 @@ size_t host_memory_backend_pagesize(HostMemoryBackend= *memdev) static void host_memory_backend_memory_complete(UserCreatable *uc, Error **errp) { + ERRP_AUTO_PROPAGATE(); HostMemoryBackend *backend =3D MEMORY_BACKEND(uc); HostMemoryBackendClass *bc =3D MEMORY_BACKEND_GET_CLASS(uc); MachineState *ms =3D MACHINE(qdev_get_machine()); - Error *local_err =3D NULL; void *ptr; uint64_t sz; =20 if (bc->alloc) { - bc->alloc(backend, &local_err); - if (local_err) { - goto out; + bc->alloc(backend, errp); + if (*errp) { + return; } =20 ptr =3D memory_region_get_ram_ptr(&backend->mr); @@ -378,14 +375,12 @@ host_memory_backend_memory_complete(UserCreatable *uc= , Error **errp) */ if (backend->prealloc) { os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz, - ms->smp.cpus, &local_err); - if (local_err) { - goto out; + ms->smp.cpus, errp); + if (*errp) { + return; } } } -out: - error_propagate(errp, local_err); } =20 static bool --=20 2.21.0