From f12c1ebddf79c965d4fdca752c6b316c889c7675 Mon Sep 17 00:00:00 2001 From: Felipe Franciosi Date: Thu, 2 Mar 2017 10:25:52 -0800 Subject: vhost-user-scsi: Introduce vhost-user-scsi host device This commit introduces a vhost-user device for SCSI. This is based on the existing vhost-scsi implementation, but done over vhost-user instead. It also uses a chardev to connect to the backend. Unlike vhost-scsi (today), VMs using vhost-user-scsi can be live migrated. To use it, start Qemu with a command line equivalent to: qemu-system-x86_64 \ -chardev socket,id=vus0,path=/tmp/vus.sock \ -device vhost-user-scsi-pci,chardev=vus0,bus=pci.0,addr=... A separate commit presents a sample application linked with libiscsi to provide a backend for vhost-user-scsi. Signed-off-by: Felipe Franciosi Message-Id: <1488479153-21203-4-git-send-email-felipe@nutanix.com> Signed-off-by: Paolo Bonzini --- include/hw/virtio/vhost-user-scsi.h | 35 +++++++++++++++++++++++++++++++++++ include/hw/virtio/virtio-scsi.h | 2 ++ 2 files changed, 37 insertions(+) create mode 100644 include/hw/virtio/vhost-user-scsi.h (limited to 'include') diff --git a/include/hw/virtio/vhost-user-scsi.h b/include/hw/virtio/vhost-user-scsi.h new file mode 100644 index 0000000..01861f7 --- /dev/null +++ b/include/hw/virtio/vhost-user-scsi.h @@ -0,0 +1,35 @@ +/* + * vhost-user-scsi host device + * + * Copyright (c) 2016 Nutanix Inc. All rights reserved. + * + * Author: + * Felipe Franciosi + * + * This file is largely based on "vhost-scsi.h" by: + * Stefan Hajnoczi + * + * This work is licensed under the terms of the GNU LGPL, version 2 or later. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#ifndef VHOST_USER_SCSI_H +#define VHOST_USER_SCSI_H + +#include "qemu-common.h" +#include "hw/qdev.h" +#include "hw/virtio/virtio-scsi.h" +#include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-scsi-common.h" + +#define TYPE_VHOST_USER_SCSI "vhost-user-scsi" +#define VHOST_USER_SCSI(obj) \ + OBJECT_CHECK(VHostUserSCSI, (obj), TYPE_VHOST_USER_SCSI) + +typedef struct VHostUserSCSI { + VHostSCSICommon parent_obj; + uint64_t host_features; +} VHostUserSCSI; + +#endif /* VHOST_USER_SCSI_H */ diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h index eac2013..de6ae5a 100644 --- a/include/hw/virtio/virtio-scsi.h +++ b/include/hw/virtio/virtio-scsi.h @@ -21,6 +21,7 @@ #include "hw/virtio/virtio.h" #include "hw/pci/pci.h" #include "hw/scsi/scsi.h" +#include "chardev/char-fe.h" #include "sysemu/iothread.h" #define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common" @@ -53,6 +54,7 @@ struct VirtIOSCSIConf { char *vhostfd; char *wwpn; #endif + CharBackend chardev; uint32_t boot_tpgt; IOThread *iothread; }; -- cgit v1.1