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[99.254.114.190]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-46132292c97sm48481691cf.49.2024.10.29.14.16.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Oct 2024 14:16:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1730236587; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=S1CHVDDrF1k42GawPCowe3EhPn3LYquuM+4EuRYWzKA=; b=AFPt7hWogpKGOOi0YJFkIS17CkMWgZshE2L424Dakde0xyaqyyxaUMfsE+n+2XPBvNgs/Q UKh9PDhKE8DswPpA//RVuDBYhoLspQWziY0+LuRc+IQgYn9/yvPYWrgySn/BivEjluOIlt WuISAcb9AkgMDbZO/ElO9so5M8O7Xqk= X-MC-Unique: WVpFe935PlWoiG7csGjArg-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730236585; x=1730841385; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=S1CHVDDrF1k42GawPCowe3EhPn3LYquuM+4EuRYWzKA=; b=PKp66erBZh3lONwZnh9NKBkhztfQL08WKieGZfvZdV9y91IsAztCBItPbXOMJmKGSC Pd6sDu/ZP13g9cx08MqSYEiwrUkEutsjLUSW8UbafzYgYon1/A2NXIqH0tI08XSM9MMI ltOuj75U0pOKJxNMvp5QozduTGK4uj0+1VGp3d7vJUAyOcyFhn4/VqNqQW/aPREqPHVo NiOPsNNdO8D8ma9VLoIgdOBj70cDWAAU33NQ8TtbKV9/nTgoYof/An2/Qvq6bVJ1POqz VlrzPKuHymrbf6d2ZlXn0qXZ4GF6OGFv0xT2S38ibOs5VMUSFdgaM12ru4gfgp1gXxmM XUIA== X-Gm-Message-State: AOJu0YwUpSoQY1UDC+cbvwP7+4oPlj063lAt03v67Ygi9jWmuuQ1oEJg eWX+s3ejhGIOU6vVlA2gy6gDnlGtpa/j5jhwf6ioS2mFyH0KLDlZbqxZ17Tof8LmbtI6LcpfAvG 0P3eJTMwtvwtwtbuI3khu79gThNEvGF0CxSEjlycyoP5EOixeRYIQZuiPc4qHlYAjbReViDneIU GdC95gYtjPA5oIjRBtCmCV5HwROA2cXSq8Zw== X-Received: by 2002:a05:6902:2e0d:b0:e2b:c7b1:eab8 with SMTP id 3f1490d57ef6-e3087a5f2bbmr13742788276.21.1730236585013; Tue, 29 Oct 2024 14:16:25 -0700 (PDT) X-Google-Smtp-Source: AGHT+IG39Zo/f66f4fcqAxZX1cGZ5rwPvnu65EqXydG/X2GLh5J+HCuu3eFX2ObUm4PgdtLeet2FGQ== X-Received: by 2002:a05:6902:2e0d:b0:e2b:c7b1:eab8 with SMTP id 3f1490d57ef6-e3087a5f2bbmr13742753276.21.1730236584645; Tue, 29 Oct 2024 14:16:24 -0700 (PDT) From: Peter Xu To: qemu-devel@nongnu.org Cc: Markus Armbruster , Peter Maydell , Eduardo Habkost , Paolo Bonzini , Mark Cave-Ayland , Igor Mammedov , "Michael S . Tsirkin" , Alex Williamson , "Dr . David Alan Gilbert" , peterx@redhat.com, =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Fabiano Rosas , Juraj Marcin Subject: [PATCH RFC v2 6/7] migration: Make migration object a singleton object Date: Tue, 29 Oct 2024 17:16:06 -0400 Message-ID: <20241029211607.2114845-7-peterx@redhat.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20241029211607.2114845-1-peterx@redhat.com> References: <20241029211607.2114845-1-peterx@redhat.com> MIME-Version: 1.0 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=170.10.129.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.302, 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_H2=-0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1730236687929116600 Content-Type: text/plain; charset="utf-8" This makes the migration object a singleton unit. After this, we can do something slightly tricky later on with the guarantee that nobody will be able to create the object twice. Signed-off-by: Peter Xu --- migration/migration.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/migration/migration.c b/migration/migration.c index 021faee2f3..f4456f7142 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -45,6 +45,7 @@ #include "qapi/qmp/qerror.h" #include "qapi/qmp/qnull.h" #include "qemu/rcu.h" +#include "qom/object_interfaces.h" #include "postcopy-ram.h" #include "qemu/thread.h" #include "trace.h" @@ -3833,11 +3834,19 @@ fail: migrate_fd_cleanup(s); } =20 +static Object *migration_get_instance(void) +{ + return object_ref(OBJECT(current_migration)); +} + static void migration_class_init(ObjectClass *klass, void *data) { DeviceClass *dc =3D DEVICE_CLASS(klass); + SingletonClass *singleton =3D SINGLETON_CLASS(klass); =20 dc->user_creatable =3D false; + singleton->get_instance =3D migration_get_instance; + device_class_set_props(dc, migration_properties); } =20 @@ -3910,6 +3919,10 @@ static const TypeInfo migration_type =3D { .instance_size =3D sizeof(MigrationState), .instance_init =3D migration_instance_init, .instance_finalize =3D migration_instance_finalize, + .interfaces =3D (InterfaceInfo[]) { + { TYPE_SINGLETON }, + { } + } }; =20 static void register_migration_types(void) --=20 2.45.0