From nobody Mon Feb 9 23:39:25 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.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=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1630004426484752.7112027004536; Thu, 26 Aug 2021 12:00:26 -0700 (PDT) Received: from localhost ([::1]:58326 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mJKbv-0004qt-Sg for importer@patchew.org; Thu, 26 Aug 2021 15:00:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39726) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mJKZz-0002ov-IL for qemu-devel@nongnu.org; Thu, 26 Aug 2021 14:58:23 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:31660) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mJKZy-00019r-58 for qemu-devel@nongnu.org; Thu, 26 Aug 2021 14:58:23 -0400 Received: from mail-qv1-f69.google.com (mail-qv1-f69.google.com [209.85.219.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-579-fntFecaxNRKd9fOs-WBdRg-1; Thu, 26 Aug 2021 14:58:20 -0400 Received: by mail-qv1-f69.google.com with SMTP id ib9-20020a0562141c8900b003671c3a1243so1086859qvb.21 for ; Thu, 26 Aug 2021 11:58:20 -0700 (PDT) Received: from t490s.phub.net.cable.rogers.com ([2607:fea8:56a3:500::d413]) by smtp.gmail.com with ESMTPSA id t8sm2328195qtn.37.2021.08.26.11.58.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Aug 2021 11:58:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1630004301; 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=nu2lN1o02zB4SS5XpgBl+iZRy4+/xMk8bEFWb+JPULI=; b=O0gGSZMzB/Fa95AQS4DEkJ8CJ6CdFYOYXI6MvJgY1mOBOzokDxaaZf8o6jg2R/hpBmftMW 0SPN5WQAZFApmfHfTzBY6WlddXCx6Uxwpizf5NUez0ie9/Zc9yv/3Mj8YZNscNdNYOY9oj vknM3caVaHYmFmvxkjsqFeTPvSpeMfA= X-MC-Unique: fntFecaxNRKd9fOs-WBdRg-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=nu2lN1o02zB4SS5XpgBl+iZRy4+/xMk8bEFWb+JPULI=; b=mtaMrrbc1fqEOmDWNUjYSyIUsMEY+mvgp05TY6lQW0NrsH3fEfU0+OLsqLg7yXHaF0 a4+yd/YOGicpUINy05phZalSvtHBJH6stYEaXqFzFR4d1ZDkUxaWBS/Ct8Of16nwXGHO 4215k7v+0ZcoYPdb6cpfV2xCpYFpKhHeH6Ysnb/zx79l32NHzFkHEjJFqF8TE8hKUAEZ RkBfTme78qsXLv0ojJXomqvF9m8qWS3qeyxorqslsZF9vfW1ONv1UE9W33Gz24YWhMI+ 1JHUTaHC3boi0FhUIYYiG8PuMlcObjU7WEHfVe4nYkXVYy+hNF2SqVk9PFTF/xMHDJ0b FJjA== X-Gm-Message-State: AOAM531AAWr/jbnhy6GF90FHtahzcepRsKmn0BtgJlSWxTNsuEfEqrpd gZtW6aOO+oCf8iGC9K/fawvY3OYMgMgT3/oOf+7Xvv+k1xPJMdNIBl45xfC9gjp6M0qcpvXbTIb sBs+I5j0V5fm7o23uJxzX6irzoPIkZvmZEMVzvu7zFoXLWukp3205sAaX8zUJf+9e X-Received: by 2002:a05:622a:c1:: with SMTP id p1mr4774570qtw.365.1630004299705; Thu, 26 Aug 2021 11:58:19 -0700 (PDT) X-Google-Smtp-Source: ABdhPJw0eQkpR0PpH5rq2Zewl/FmICoiN2mgu43xwE4zMJT7Zp6lFl18qzH7oO+VcXt11VxlffI1IQ== X-Received: by 2002:a05:622a:c1:: with SMTP id p1mr4774544qtw.365.1630004299425; Thu, 26 Aug 2021 11:58:19 -0700 (PDT) From: Peter Xu To: qemu-devel@nongnu.org Subject: [PATCH v2 2/3] migration: Add migrate_add_blocker_internal() Date: Thu, 26 Aug 2021 14:58:12 -0400 Message-Id: <20210826185813.248441-3-peterx@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210826185813.248441-1-peterx@redhat.com> References: <20210826185813.248441-1-peterx@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=peterx@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=216.205.24.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.742, 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_H2=-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: Andrew Jones , Juan Quintela , "Dr . David Alan Gilbert" , peterx@redhat.com, Markus Armbruster , Leonardo Bras Soares Passos , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1630004427539100003 An internal version that removes -only-migratable implications. It can be = used for temporary migration blockers like dump-guest-memory. Reviewed-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Juan Quintela Signed-off-by: Peter Xu --- include/migration/blocker.h | 16 ++++++++++++++++ migration/migration.c | 21 +++++++++++++-------- 2 files changed, 29 insertions(+), 8 deletions(-) diff --git a/include/migration/blocker.h b/include/migration/blocker.h index acd27018e9..9cebe2ba06 100644 --- a/include/migration/blocker.h +++ b/include/migration/blocker.h @@ -25,6 +25,22 @@ */ int migrate_add_blocker(Error *reason, Error **errp); =20 +/** + * @migrate_add_blocker_internal - prevent migration from proceeding witho= ut + * only-migrate implications + * + * @reason - an error to be returned whenever migration is attempted + * + * @errp - [out] The reason (if any) we cannot block migration right now. + * + * @returns - 0 on success, -EBUSY on failure, with errp set. + * + * Some of the migration blockers can be temporary (e.g., for a few second= s), + * so it shouldn't need to conflict with "-only-migratable". For those ca= ses, + * we can call this function rather than @migrate_add_blocker(). + */ +int migrate_add_blocker_internal(Error *reason, Error **errp); + /** * @migrate_del_blocker - remove a blocking error from migration * diff --git a/migration/migration.c b/migration/migration.c index f476e2101e..2aaf2fd449 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -2053,15 +2053,8 @@ void migrate_init(MigrationState *s) s->threshold_size =3D 0; } =20 -int migrate_add_blocker(Error *reason, Error **errp) +int migrate_add_blocker_internal(Error *reason, Error **errp) { - if (only_migratable) { - error_propagate_prepend(errp, error_copy(reason), - "disallowing migration blocker " - "(--only-migratable) for: "); - return -EACCES; - } - /* Snapshots are similar to migrations, so check RUN_STATE_SAVE_VM too= . */ if (runstate_check(RUN_STATE_SAVE_VM) || !migration_is_idle()) { error_propagate_prepend(errp, error_copy(reason), @@ -2074,6 +2067,18 @@ int migrate_add_blocker(Error *reason, Error **errp) return 0; } =20 +int migrate_add_blocker(Error *reason, Error **errp) +{ + if (only_migratable) { + error_propagate_prepend(errp, error_copy(reason), + "disallowing migration blocker " + "(--only-migratable) for: "); + return -EACCES; + } + + return migrate_add_blocker_internal(reason, errp); +} + void migrate_del_blocker(Error *reason) { migration_blockers =3D g_slist_remove(migration_blockers, reason); --=20 2.31.1