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 11AD6C47404 for ; Fri, 11 Oct 2019 18:36:47 +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 DA898206CD for ; Fri, 11 Oct 2019 18:36:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DA898206CD 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]:55622 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIzmP-0002fZ-Pn for qemu-devel@archiver.kernel.org; Fri, 11 Oct 2019 14:36:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41401) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIxlX-0006wp-BR for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:27:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIxlV-0002ag-JA for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:27:43 -0400 Received: from relay.sw.ru ([185.231.240.75]:49804) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIxlV-0002aU-Bu; Fri, 11 Oct 2019 12:27:41 -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 1iIxR8-0003XG-Au; Fri, 11 Oct 2019 19:06:38 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org Subject: [RFC v5 117/126] Replication: introduce ERRP_AUTO_PROPAGATE Date: Fri, 11 Oct 2019 19:05:43 +0300 Message-Id: <20191011160552.22907-118-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, qemu-block@nongnu.org, Wen Congyang , Xie Changlong , armbru@redhat.com, Greg Kurz , Max Reitz 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 --- block/replication.c | 40 ++++++++++++++++++---------------------- replication.c | 28 ++++++++++++---------------- 2 files changed, 30 insertions(+), 38 deletions(-) diff --git a/block/replication.c b/block/replication.c index 936b2f8b5a..f5e7c5a8ec 100644 --- a/block/replication.c +++ b/block/replication.c @@ -83,9 +83,9 @@ static ReplicationOps replication_ops = { static int replication_open(BlockDriverState *bs, QDict *options, int flags, Error **errp) { + ERRP_AUTO_PROPAGATE(); int ret; BDRVReplicationState *s = bs->opaque; - Error *local_err = NULL; QemuOpts *opts = NULL; const char *mode; const char *top_id; @@ -98,14 +98,14 @@ static int replication_open(BlockDriverState *bs, QDict *options, ret = -EINVAL; opts = qemu_opts_create(&replication_runtime_opts, NULL, 0, &error_abort); - qemu_opts_absorb_qdict(opts, options, &local_err); - if (local_err) { + qemu_opts_absorb_qdict(opts, options, errp); + if (*errp) { goto fail; } mode = qemu_opt_get(opts, REPLICATION_MODE); if (!mode) { - error_setg(&local_err, "Missing the option mode"); + error_setg(errp, "Missing the option mode"); goto fail; } @@ -113,7 +113,8 @@ static int replication_open(BlockDriverState *bs, QDict *options, s->mode = REPLICATION_MODE_PRIMARY; top_id = qemu_opt_get(opts, REPLICATION_TOP_ID); if (top_id) { - error_setg(&local_err, "The primary side does not support option top-id"); + error_setg(errp, + "The primary side does not support option top-id"); goto fail; } } else if (!strcmp(mode, "secondary")) { @@ -121,11 +122,11 @@ static int replication_open(BlockDriverState *bs, QDict *options, top_id = qemu_opt_get(opts, REPLICATION_TOP_ID); s->top_id = g_strdup(top_id); if (!s->top_id) { - error_setg(&local_err, "Missing the option top-id"); + error_setg(errp, "Missing the option top-id"); goto fail; } } else { - error_setg(&local_err, + error_setg(errp, "The option mode's value should be primary or secondary"); goto fail; } @@ -136,7 +137,6 @@ static int replication_open(BlockDriverState *bs, QDict *options, fail: qemu_opts_del(opts); - error_propagate(errp, local_err); return ret; } @@ -314,7 +314,7 @@ static bool replication_recurse_is_first_non_filter(BlockDriverState *bs, static void secondary_do_checkpoint(BDRVReplicationState *s, Error **errp) { - Error *local_err = NULL; + ERRP_AUTO_PROPAGATE(); int ret; if (!s->backup_job) { @@ -322,9 +322,8 @@ static void secondary_do_checkpoint(BDRVReplicationState *s, Error **errp) return; } - backup_do_checkpoint(s->backup_job, &local_err); - if (local_err) { - error_propagate(errp, local_err); + backup_do_checkpoint(s->backup_job, errp); + if (*errp) { return; } @@ -361,9 +360,9 @@ static void secondary_do_checkpoint(BDRVReplicationState *s, Error **errp) static void reopen_backing_file(BlockDriverState *bs, bool writable, Error **errp) { + ERRP_AUTO_PROPAGATE(); BDRVReplicationState *s = bs->opaque; BlockReopenQueue *reopen_queue = NULL; - Error *local_err = NULL; if (writable) { s->orig_hidden_read_only = bdrv_is_read_only(s->hidden_disk->bs); @@ -388,8 +387,7 @@ static void reopen_backing_file(BlockDriverState *bs, bool writable, } if (reopen_queue) { - bdrv_reopen_multiple(reopen_queue, &local_err); - error_propagate(errp, local_err); + bdrv_reopen_multiple(reopen_queue, errp); } bdrv_subtree_drained_end(s->hidden_disk->bs); @@ -445,12 +443,12 @@ static bool check_top_bs(BlockDriverState *top_bs, BlockDriverState *bs) static void replication_start(ReplicationState *rs, ReplicationMode mode, Error **errp) { + ERRP_AUTO_PROPAGATE(); BlockDriverState *bs = rs->opaque; BDRVReplicationState *s; BlockDriverState *top_bs; int64_t active_length, hidden_length, disk_length; AioContext *aio_context; - Error *local_err = NULL; aio_context = bdrv_get_aio_context(bs); aio_context_acquire(aio_context); @@ -519,9 +517,8 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode, } /* reopen the backing file in r/w mode */ - reopen_backing_file(bs, true, &local_err); - if (local_err) { - error_propagate(errp, local_err); + reopen_backing_file(bs, true, errp); + if (*errp) { aio_context_release(aio_context); return; } @@ -546,9 +543,8 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode, 0, MIRROR_SYNC_MODE_NONE, NULL, 0, false, BLOCKDEV_ON_ERROR_REPORT, BLOCKDEV_ON_ERROR_REPORT, JOB_INTERNAL, - backup_job_completed, bs, NULL, &local_err); - if (local_err) { - error_propagate(errp, local_err); + backup_job_completed, bs, NULL, errp); + if (*errp) { backup_job_cleanup(bs); aio_context_release(aio_context); return; diff --git a/replication.c b/replication.c index be3a42f9c9..2e5ea7f537 100644 --- a/replication.c +++ b/replication.c @@ -44,15 +44,14 @@ void replication_remove(ReplicationState *rs) */ void replication_start_all(ReplicationMode mode, Error **errp) { + ERRP_AUTO_PROPAGATE(); ReplicationState *rs, *next; - Error *local_err = NULL; QLIST_FOREACH_SAFE(rs, &replication_states, node, next) { if (rs->ops && rs->ops->start) { - rs->ops->start(rs, mode, &local_err); + rs->ops->start(rs, mode, errp); } - if (local_err) { - error_propagate(errp, local_err); + if (*errp) { return; } } @@ -60,15 +59,14 @@ void replication_start_all(ReplicationMode mode, Error **errp) void replication_do_checkpoint_all(Error **errp) { + ERRP_AUTO_PROPAGATE(); ReplicationState *rs, *next; - Error *local_err = NULL; QLIST_FOREACH_SAFE(rs, &replication_states, node, next) { if (rs->ops && rs->ops->checkpoint) { - rs->ops->checkpoint(rs, &local_err); + rs->ops->checkpoint(rs, errp); } - if (local_err) { - error_propagate(errp, local_err); + if (*errp) { return; } } @@ -76,15 +74,14 @@ void replication_do_checkpoint_all(Error **errp) void replication_get_error_all(Error **errp) { + ERRP_AUTO_PROPAGATE(); ReplicationState *rs, *next; - Error *local_err = NULL; QLIST_FOREACH_SAFE(rs, &replication_states, node, next) { if (rs->ops && rs->ops->get_error) { - rs->ops->get_error(rs, &local_err); + rs->ops->get_error(rs, errp); } - if (local_err) { - error_propagate(errp, local_err); + if (*errp) { return; } } @@ -92,15 +89,14 @@ void replication_get_error_all(Error **errp) void replication_stop_all(bool failover, Error **errp) { + ERRP_AUTO_PROPAGATE(); ReplicationState *rs, *next; - Error *local_err = NULL; QLIST_FOREACH_SAFE(rs, &replication_states, node, next) { if (rs->ops && rs->ops->stop) { - rs->ops->stop(rs, failover, &local_err); + rs->ops->stop(rs, failover, errp); } - if (local_err) { - error_propagate(errp, local_err); + if (*errp) { return; } } -- 2.21.0