From patchwork Wed Jan 15 13:50:43 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 13940481 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 6E78FC02180 for ; Wed, 15 Jan 2025 13:51:12 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tY3nU-0006hn-JU; Wed, 15 Jan 2025 08:51:08 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tY3nL-0006Ze-6y for qemu-devel@nongnu.org; Wed, 15 Jan 2025 08:50:55 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tY3nJ-0007uZ-5s for qemu-devel@nongnu.org; Wed, 15 Jan 2025 08:50:54 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1736949052; 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=xsKepFBipeuwCEkbj9TToSPlSSF2s/jUgoEpM16fklg=; b=VXpptz3zCVdqb3+jdgC1lEyOmLHWAgeWBLDj1mgkuIISYUkxA8h1aEYANNCOoa6eBuYxGS PaFkcjmU0n9itkBrxbgM+WoH9+ysaWJzGAAbf2ThDY6pMJ82vu58n4iT61/H8ORggwl7T9 1OML7kQTatCw0VES3fLEp7Z3uOcV1mI= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-363-GpbBqshOOX-0kccjMcRxBA-1; Wed, 15 Jan 2025 08:50:50 -0500 X-MC-Unique: GpbBqshOOX-0kccjMcRxBA-1 X-Mimecast-MFC-AGG-ID: GpbBqshOOX-0kccjMcRxBA Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 28215197700A for ; Wed, 15 Jan 2025 13:50:50 +0000 (UTC) Received: from lenovo-t14s.redhat.com (unknown [10.39.192.232]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 7D5AB19560A3; Wed, 15 Jan 2025 13:50:48 +0000 (UTC) From: Laurent Vivier To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Hanna Czenczek , Jason Wang Subject: [PATCH v2 1/2] vhost: Add stubs for the migration state transfer interface Date: Wed, 15 Jan 2025 14:50:43 +0100 Message-ID: <20250115135044.799698-2-lvivier@redhat.com> In-Reply-To: <20250115135044.799698-1-lvivier@redhat.com> References: <20250115135044.799698-1-lvivier@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass client-ip=170.10.129.124; envelope-from=lvivier@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.141, 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_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Migration state transfer interface is only used by vhost-user-fs, so the interface needs to be defined only when vhost is built. But I need to use this interface with virtio-net and vhost is not always enabled, and to avoid undefined reference error during build, define stub functions for vhost_supports_device_state(), vhost_save_backend_state() and vhost_load_backend_state(). Cc: Hanna Czenczek Signed-off-by: Laurent Vivier --- include/hw/virtio/vhost.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 461c168c3739..a9469d50bca1 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -365,7 +365,14 @@ static inline int vhost_reset_device(struct vhost_dev *hdev) * Returns true if the device supports these commands, and false if it * does not. */ +#ifdef CONFIG_VHOST bool vhost_supports_device_state(struct vhost_dev *dev); +#else +static inline bool vhost_supports_device_state(struct vhost_dev *dev) +{ + return false; +} +#endif /** * vhost_set_device_state_fd(): Begin transfer of internal state from/to @@ -448,7 +455,15 @@ int vhost_check_device_state(struct vhost_dev *dev, Error **errp); * * Returns 0 on success, and -errno otherwise. */ +#ifdef CONFIG_VHOST int vhost_save_backend_state(struct vhost_dev *dev, QEMUFile *f, Error **errp); +#else +static inline int vhost_save_backend_state(struct vhost_dev *dev, QEMUFile *f, + Error **errp) +{ + return -ENOSYS; +} +#endif /** * vhost_load_backend_state(): High-level function to load a vhost @@ -465,6 +480,14 @@ int vhost_save_backend_state(struct vhost_dev *dev, QEMUFile *f, Error **errp); * * Returns 0 on success, and -errno otherwise. */ +#ifdef CONFIG_VHOST int vhost_load_backend_state(struct vhost_dev *dev, QEMUFile *f, Error **errp); +#else +static inline int vhost_load_backend_state(struct vhost_dev *dev, QEMUFile *f, + Error **errp) +{ + return -ENOSYS; +} +#endif #endif