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Tue, 09 Feb 2021 14:02:57 -0500 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-502-OQrZAUutMTmZNaklyrXwEQ-1; Tue, 09 Feb 2021 14:02:53 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 73931107ACE3 for ; Tue, 9 Feb 2021 19:02:52 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-112-66.ams2.redhat.com [10.36.112.66]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0D96E60C04; Tue, 9 Feb 2021 19:02:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612897375; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QNlair57xLZNrH0eP3P8pdNTju7RHayYUY0OubI3yAo=; b=GUTB+DJYZ/MelbHPh6HG/IYfus+H4a8m2FlN1+MVtU/IEkTMwaDhfQCuQCSU2FoG1lN6k/ jnh2Rc2fn/CbM8IxO63s79d/bsY9t6ek/+bKxgbirmtfWvMOSpxjEnmI/R+/R3I+1nOElt dPPm2PhjoeX0GrbbICkJPdcx6V9FN8c= X-MC-Unique: OQrZAUutMTmZNaklyrXwEQ-1 From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, vgoyal@redhat.com, stefanha@redhat.com, virtio-fs@redhat.com, marcandre.lureau@redhat.com, mst@redhat.com Subject: [PATCH 02/24] DAX: libvhost-user: Route slave message payload Date: Tue, 9 Feb 2021 19:02:02 +0000 Message-Id: <20210209190224.62827-3-dgilbert@redhat.com> In-Reply-To: <20210209190224.62827-1-dgilbert@redhat.com> References: <20210209190224.62827-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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=63.128.21.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.57, 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_H4=0.001, RCVD_IN_MSPIKE_WL=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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" From: "Dr. David Alan Gilbert" Route the uint64 payload from message replies on the slave back up through vu_process_message_reply and to the callers. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Stefan Hajnoczi --- subprojects/libvhost-user/libvhost-user.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvho= st-user/libvhost-user.c index fab7ca17ee..937f64480d 100644 --- a/subprojects/libvhost-user/libvhost-user.c +++ b/subprojects/libvhost-user/libvhost-user.c @@ -403,9 +403,11 @@ vu_send_reply(VuDev *dev, int conn_fd, VhostUserMsg *v= msg) * Processes a reply on the slave channel. * Entered with slave_mutex held and releases it before exit. * Returns true on success. + * *payload is written on success */ static bool -vu_process_message_reply(VuDev *dev, const VhostUserMsg *vmsg) +vu_process_message_reply(VuDev *dev, const VhostUserMsg *vmsg, + uint64_t *payload) { VhostUserMsg msg_reply; bool result =3D false; @@ -425,7 +427,8 @@ vu_process_message_reply(VuDev *dev, const VhostUserMsg= *vmsg) goto out; } =20 - result =3D msg_reply.payload.u64 =3D=3D 0; + *payload =3D msg_reply.payload.u64; + result =3D true; =20 out: pthread_mutex_unlock(&dev->slave_mutex); @@ -1312,6 +1315,8 @@ bool vu_set_queue_host_notifier(VuDev *dev, VuVirtq *= vq, int fd, { int qidx =3D vq - dev->vq; int fd_num =3D 0; + bool res; + uint64_t payload =3D 0; VhostUserMsg vmsg =3D { .request =3D VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG, .flags =3D VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK, @@ -1342,7 +1347,10 @@ bool vu_set_queue_host_notifier(VuDev *dev, VuVirtq = *vq, int fd, } =20 /* Also unlocks the slave_mutex */ - return vu_process_message_reply(dev, &vmsg); + res =3D vu_process_message_reply(dev, &vmsg, &payload); + res =3D res && (payload =3D=3D 0); + + return res; } =20 static bool --=20 2.29.2