From patchwork Tue Jul 24 22:34:05 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nicholas A. Bellinger" X-Patchwork-Id: 173072 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 8FD162C0081 for ; Wed, 25 Jul 2012 08:38:32 +1000 (EST) Received: from localhost ([::1]:41036 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1StnkM-00072S-Ic for incoming@patchwork.ozlabs.org; Tue, 24 Jul 2012 18:38:30 -0400 Received: from eggs.gnu.org ([208.118.235.92]:60620) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Stnja-0005hx-En for qemu-devel@nongnu.org; Tue, 24 Jul 2012 18:37:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1StnjZ-0003dL-FU for qemu-devel@nongnu.org; Tue, 24 Jul 2012 18:37:42 -0400 Received: from mail.linux-iscsi.org ([67.23.28.174]:51173 helo=linux-iscsi.org) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1StnjZ-0003dF-A6 for qemu-devel@nongnu.org; Tue, 24 Jul 2012 18:37:41 -0400 Received: from linux-iscsi.org (localhost [127.0.0.1]) by linux-iscsi.org (Postfix) with ESMTP id 78C0122D9DD; Tue, 24 Jul 2012 22:34:39 +0000 (UTC) From: "Nicholas A. Bellinger" To: target-devel Date: Tue, 24 Jul 2012 22:34:05 +0000 Message-Id: <1343169246-17636-9-git-send-email-nab@linux-iscsi.org> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1343169246-17636-1-git-send-email-nab@linux-iscsi.org> References: <1343169246-17636-1-git-send-email-nab@linux-iscsi.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 1) X-Received-From: 67.23.28.174 Cc: Jens Axboe , Stefan Hajnoczi , kvm-devel , "Michael S. Tsirkin" , qemu-devel , Nicholas Bellinger , Zhi Yong Wu , Anthony Liguori , Zhi Yong Wu , Hannes Reinecke , Paolo Bonzini , lf-virt , Christoph Hellwig Subject: [Qemu-devel] [RFC 8/9] virtio-scsi: Set max_target=0 during vhost-scsi operation X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Nicholas Bellinger This QEMU patch sets VirtIOSCSIConfig->max_target=0 for vhost-scsi operation to restrict virtio-scsi LLD guest scanning to max_id=0 (a single target ID instance) when connected to individual tcm_vhost endpoints. This ensures that virtio-scsi LLD only attempts to scan target IDs up to VIRTIO_SCSI_MAX_TARGET when connected via virtio-scsi-raw. Cc: Stefan Hajnoczi Cc: Zhi Yong Wu Cc: Paolo Bonzini Signed-off-by: Nicholas Bellinger --- hw/virtio-scsi.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/hw/virtio-scsi.c b/hw/virtio-scsi.c index b0adfde..d854998 100644 --- a/hw/virtio-scsi.c +++ b/hw/virtio-scsi.c @@ -534,7 +534,11 @@ static void virtio_scsi_get_config(VirtIODevice *vdev, stl_raw(&scsiconf->sense_size, s->sense_size); stl_raw(&scsiconf->cdb_size, s->cdb_size); stl_raw(&scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL); - stl_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET); + if (s->vhost_scsi) { + stl_raw(&scsiconf->max_target, 0); + } else { + stl_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET); + } stl_raw(&scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN); }