From patchwork Wed Oct 21 16:26:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= X-Patchwork-Id: 302374 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=-9.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 C24C4C388F9 for ; Wed, 21 Oct 2020 16:29:57 +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 201342177B for ; Wed, 21 Oct 2020 16:29:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZefjoM4k" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 201342177B 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]:34620 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kVGzr-0004Dm-SC for qemu-devel@archiver.kernel.org; Wed, 21 Oct 2020 12:29:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59258) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kVGxT-00021J-1S for qemu-devel@nongnu.org; Wed, 21 Oct 2020 12:27:27 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:37239) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kVGxR-0004s2-5E for qemu-devel@nongnu.org; Wed, 21 Oct 2020 12:27:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1603297644; 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: in-reply-to:in-reply-to:references:references; bh=Ppg8Ps61W4ZcMSWhIJFSno26RYS3TbBmLV65BCav0PQ=; b=ZefjoM4kKqeFNw2DrU+ytBcAP0loBlwfV2BP+n+ZSQUaCPL6AuAfCaaiU8LoKNE2XYEeEc Ga0qpPkh30TCurjS0ign6Ny1mh3KU+Q+PgPZ8jJ6DyU775yHzCsMHrMoIzUuH3/XYg2CAy EvfL4hKqY9MvCpzTs2wro9M59LNrnaA= 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-260-2AVnsg0nM-SVa5rXxEG--A-1; Wed, 21 Oct 2020 12:27:19 -0400 X-MC-Unique: 2AVnsg0nM-SVa5rXxEG--A-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AA11018829D5; Wed, 21 Oct 2020 16:27:18 +0000 (UTC) Received: from localhost.localdomain.com (unknown [10.36.110.19]) by smtp.corp.redhat.com (Postfix) with ESMTP id E577910013C1; Wed, 21 Oct 2020 16:27:14 +0000 (UTC) From: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v7 02/11] migration: Make save_snapshot() return bool, not 0/-1 Date: Wed, 21 Oct 2020 17:26:55 +0100 Message-Id: <20201021162704.3652555-3-berrange@redhat.com> In-Reply-To: <20201021162704.3652555-1-berrange@redhat.com> References: <20201021162704.3652555-1-berrange@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/20 22:12:28 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: Kevin Wolf , Peter Krempa , Pavel Dovgalyuk , "Denis V. Lunev" , qemu-block@nongnu.org, Juan Quintela , John Snow , =?utf-8?q?Philip?= =?utf-8?q?pe_Mathieu-Daud=C3=A9?= , "Dr. David Alan Gilbert" , Max Reitz , Pavel Dovgalyuk , Paolo Bonzini , Markus Armbruster Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Philippe Mathieu-Daudé Just for consistency, following the example documented since commit e3fe3988d7 ("error: Document Error API usage rules"), return a boolean value indicating an error is set or not. Acked-by: Pavel Dovgalyuk Signed-off-by: Philippe Mathieu-Daudé --- include/migration/snapshot.h | 9 ++++++++- migration/savevm.c | 16 ++++++++-------- replay/replay-debugging.c | 2 +- replay/replay-snapshot.c | 2 +- 4 files changed, 18 insertions(+), 11 deletions(-) diff --git a/include/migration/snapshot.h b/include/migration/snapshot.h index c85b6ec75b..0eaf1ba0b1 100644 --- a/include/migration/snapshot.h +++ b/include/migration/snapshot.h @@ -15,7 +15,14 @@ #ifndef QEMU_MIGRATION_SNAPSHOT_H #define QEMU_MIGRATION_SNAPSHOT_H -int save_snapshot(const char *name, Error **errp); +/** + * save_snapshot: Save an internal snapshot. + * @name: name of internal snapshot + * @errp: pointer to error object + * On success, return %true. + * On failure, store an error through @errp and return %false. + */ +bool save_snapshot(const char *name, Error **errp); int load_snapshot(const char *name, Error **errp); #endif diff --git a/migration/savevm.c b/migration/savevm.c index a52da440f4..fd2e5e8b66 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -2658,7 +2658,7 @@ int qemu_load_device_state(QEMUFile *f) return 0; } -int save_snapshot(const char *name, Error **errp) +bool save_snapshot(const char *name, Error **errp) { BlockDriverState *bs; QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; @@ -2671,29 +2671,29 @@ int save_snapshot(const char *name, Error **errp) AioContext *aio_context; if (migration_is_blocked(errp)) { - return ret; + return false; } if (!replay_can_snapshot()) { error_setg(errp, "Record/replay does not allow making snapshot " "right now. Try once more later."); - return ret; + return false; } if (!bdrv_all_can_snapshot(errp)) { - return ret; + return false; } /* Delete old snapshots of the same name */ if (name) { if (bdrv_all_delete_snapshot(name, errp) < 0) { - return ret; + return false; } } bs = bdrv_all_find_vmstate_bs(errp); if (bs == NULL) { - return ret; + return false; } aio_context = bdrv_get_aio_context(bs); @@ -2702,7 +2702,7 @@ int save_snapshot(const char *name, Error **errp) ret = global_state_store(); if (ret) { error_setg(errp, "Error saving global state"); - return ret; + return false; } vm_stop(RUN_STATE_SAVE_VM); @@ -2779,7 +2779,7 @@ int save_snapshot(const char *name, Error **errp) if (saved_vm_running) { vm_start(); } - return ret; + return ret == 0; } void qmp_xen_save_devices_state(const char *filename, bool has_live, bool live, diff --git a/replay/replay-debugging.c b/replay/replay-debugging.c index 8785489c02..5458a73fce 100644 --- a/replay/replay-debugging.c +++ b/replay/replay-debugging.c @@ -327,7 +327,7 @@ void replay_gdb_attached(void) */ if (replay_mode == REPLAY_MODE_PLAY && !replay_snapshot) { - if (save_snapshot("start_debugging", NULL) != 0) { + if (!save_snapshot("start_debugging", NULL)) { /* Can't create the snapshot. Continue conventional debugging. */ } } diff --git a/replay/replay-snapshot.c b/replay/replay-snapshot.c index e26fa4c892..4f2560d156 100644 --- a/replay/replay-snapshot.c +++ b/replay/replay-snapshot.c @@ -77,7 +77,7 @@ void replay_vmstate_init(void) if (replay_snapshot) { if (replay_mode == REPLAY_MODE_RECORD) { - if (save_snapshot(replay_snapshot, &err) != 0) { + if (!save_snapshot(replay_snapshot, &err)) { error_report_err(err); error_report("Could not create snapshot for icount record"); exit(1);