From patchwork Thu Nov 16 20:44:38 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liu, Changpeng" X-Patchwork-Id: 10062085 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 88DCB6023A for ; Thu, 16 Nov 2017 20:43:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7A6A12AC06 for ; Thu, 16 Nov 2017 20:43:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6D3DB2AC0B; Thu, 16 Nov 2017 20:43:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 15AB92AC07 for ; Thu, 16 Nov 2017 20:43:37 +0000 (UTC) Received: from localhost ([::1]:42770 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eFR0a-0007fq-BT for patchwork-qemu-devel@patchwork.kernel.org; Thu, 16 Nov 2017 15:43:36 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39922) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eFQzG-0007bW-GQ for qemu-devel@nongnu.org; Thu, 16 Nov 2017 15:42:17 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eFQzE-0001ap-2T for qemu-devel@nongnu.org; Thu, 16 Nov 2017 15:42:14 -0500 Received: from mga01.intel.com ([192.55.52.88]:34527) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eFQzD-0001ZF-Jg for qemu-devel@nongnu.org; Thu, 16 Nov 2017 15:42:11 -0500 Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Nov 2017 12:42:10 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,405,1505804400"; d="scan'208";a="150252142" Received: from fedora.sh.intel.com ([10.67.112.210]) by orsmga004.jf.intel.com with ESMTP; 16 Nov 2017 12:42:08 -0800 From: Changpeng Liu To: changpeng.liu@intel.com, qemu-devel@nongnu.org Date: Fri, 17 Nov 2017 04:44:38 +0800 Message-Id: <1510865080-32027-3-git-send-email-changpeng.liu@intel.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1510865080-32027-1-git-send-email-changpeng.liu@intel.com> References: <1510865080-32027-1-git-send-email-changpeng.liu@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.88 Subject: [Qemu-devel] [PATCH v5 2/4] vhost-user-blk: introduce a new vhost-user-blk host device X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: james.r.harris@intel.com, mst@redhat.com, stefanha@gmail.com, pbonzini@redhat.com, felipe@nutanix.com, marcandre.lureau@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This commit introduces a new vhost-user device for block, it uses a chardev to connect with the backend, same with Qemu virito-blk device, Guest OS still uses the virtio-blk frontend driver. To use it, start Qemu with command line like this: qemu-system-x86_64 \ -chardev socket,id=char0,path=/path/vhost.socket \ -device vhost-user-blk-pci,chardev=char0,num-queues=2, \ bootindex=2... \ Users can use different parameters for `num-queues` and `bootindex`. Different with exist Qemu virtio-blk host device, it makes more easy for users to implement their own I/O processing logic, such as all user space I/O stack against hardware block device. It uses the new vhost messages(VHOST_USER_GET_CONFIG) to get block virtio config information from backend process. Signed-off-by: Changpeng Liu --- default-configs/pci.mak | 1 + hw/block/Makefile.objs | 3 + hw/block/vhost-user-blk.c | 356 +++++++++++++++++++++++++++++++++++++ hw/virtio/virtio-pci.c | 55 ++++++ hw/virtio/virtio-pci.h | 18 ++ include/hw/virtio/vhost-user-blk.h | 42 +++++ 6 files changed, 475 insertions(+) create mode 100644 hw/block/vhost-user-blk.c create mode 100644 include/hw/virtio/vhost-user-blk.h diff --git a/default-configs/pci.mak b/default-configs/pci.mak index e514bde..49a0f28 100644 --- a/default-configs/pci.mak +++ b/default-configs/pci.mak @@ -43,3 +43,4 @@ CONFIG_VGA_PCI=y CONFIG_IVSHMEM_DEVICE=$(CONFIG_IVSHMEM) CONFIG_ROCKER=y CONFIG_VHOST_USER_SCSI=$(call land,$(CONFIG_VHOST_USER),$(CONFIG_LINUX)) +CONFIG_VHOST_USER_BLK=$(call land,$(CONFIG_VHOST_USER),$(CONFIG_LINUX)) diff --git a/hw/block/Makefile.objs b/hw/block/Makefile.objs index e0ed980..4c19a58 100644 --- a/hw/block/Makefile.objs +++ b/hw/block/Makefile.objs @@ -13,3 +13,6 @@ obj-$(CONFIG_SH4) += tc58128.o obj-$(CONFIG_VIRTIO) += virtio-blk.o obj-$(CONFIG_VIRTIO) += dataplane/ +ifeq ($(CONFIG_VIRTIO),y) +obj-$(CONFIG_VHOST_USER_BLK) += vhost-user-blk.o +endif diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c new file mode 100644 index 0000000..71bd6e7 --- /dev/null +++ b/hw/block/vhost-user-blk.c @@ -0,0 +1,356 @@ +/* + * vhost-user-blk host device + * + * Copyright(C) 2017 Intel Corporation. + * + * Authors: + * Changpeng Liu + * + * Largely based on the "vhost-user-scsi.c" and "vhost-scsi.c" implemented by: + * Felipe Franciosi + * Stefan Hajnoczi + * Nicholas Bellinger + * + * 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. + * + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "qemu/typedefs.h" +#include "qemu/cutils.h" +#include "qom/object.h" +#include "hw/qdev-core.h" +#include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-user-blk.h" +#include "hw/virtio/virtio.h" +#include "hw/virtio/virtio-bus.h" +#include "hw/virtio/virtio-access.h" + +static const int user_feature_bits[] = { + VIRTIO_BLK_F_SIZE_MAX, + VIRTIO_BLK_F_SEG_MAX, + VIRTIO_BLK_F_GEOMETRY, + VIRTIO_BLK_F_BLK_SIZE, + VIRTIO_BLK_F_TOPOLOGY, + VIRTIO_BLK_F_MQ, + VIRTIO_BLK_F_RO, + VIRTIO_BLK_F_FLUSH, + VIRTIO_BLK_F_CONFIG_WCE, + VIRTIO_F_VERSION_1, + VIRTIO_RING_F_INDIRECT_DESC, + VIRTIO_RING_F_EVENT_IDX, + VIRTIO_F_NOTIFY_ON_EMPTY, + VHOST_INVALID_FEATURE_BIT +}; + +static void vhost_user_blk_update_config(VirtIODevice *vdev, uint8_t *config) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + + memcpy(config, &s->blkcfg, sizeof(struct virtio_blk_config)); +} + +static void vhost_user_blk_set_config(VirtIODevice *vdev, const uint8_t *config) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + struct virtio_blk_config *blkcfg = (struct virtio_blk_config *)config; + int ret; + + if (blkcfg->wce == s->blkcfg.wce) { + return; + } + + ret = vhost_dev_set_config(&s->dev, config, + offsetof(struct virtio_blk_config, wce), + sizeof(blkcfg->wce)); + if (ret) { + error_report("set device config space failed"); + return; + } + + s->blkcfg.wce = blkcfg->wce; +} + +static void vhost_user_blk_handle_config_change(struct vhost_dev *dev) +{ + int ret; + struct virtio_blk_config blkcfg; + VHostUserBlk *s = VHOST_USER_BLK(dev->vdev); + + ret = vhost_dev_get_config(dev, (uint8_t *)&blkcfg, + sizeof(struct virtio_blk_config)); + if (ret < 0) { + error_report("get config space failed"); + return; + } + + /* valid for resize only */ + if (blkcfg.capacity != s->blkcfg.capacity) { + s->blkcfg.capacity = blkcfg.capacity; + memcpy(dev->vdev->config, &s->blkcfg, sizeof(struct virtio_blk_config)); + virtio_notify_config(dev->vdev); + } +} + +const VhostDevConfigOps blk_ops = { + .vhost_dev_config_notifier = vhost_user_blk_handle_config_change, +}; + +static void vhost_user_blk_start(VirtIODevice *vdev) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); + int i, ret; + + if (!k->set_guest_notifiers) { + error_report("binding does not support guest notifiers"); + return; + } + + ret = vhost_dev_enable_notifiers(&s->dev, vdev); + if (ret < 0) { + error_report("Error enabling host notifiers: %d", -ret); + return; + } + + ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true); + if (ret < 0) { + error_report("Error binding guest notifier: %d", -ret); + goto err_host_notifiers; + } + + s->dev.acked_features = vdev->guest_features; + ret = vhost_dev_start(&s->dev, vdev); + if (ret < 0) { + error_report("Error starting vhost: %d", -ret); + goto err_guest_notifiers; + } + + /* guest_notifier_mask/pending not used yet, so just unmask + * everything here. virtio-pci will do the right thing by + * enabling/disabling irqfd. + */ + for (i = 0; i < s->dev.nvqs; i++) { + vhost_virtqueue_mask(&s->dev, vdev, i, false); + } + + return; + +err_guest_notifiers: + k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false); +err_host_notifiers: + vhost_dev_disable_notifiers(&s->dev, vdev); +} + +static void vhost_user_blk_stop(VirtIODevice *vdev) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); + int ret; + + if (!k->set_guest_notifiers) { + return; + } + + vhost_dev_stop(&s->dev, vdev); + + ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false); + if (ret < 0) { + error_report("vhost guest notifier cleanup failed: %d", ret); + return; + } + + vhost_dev_disable_notifiers(&s->dev, vdev); +} + +static void vhost_user_blk_set_status(VirtIODevice *vdev, uint8_t status) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + bool should_start = status & VIRTIO_CONFIG_S_DRIVER_OK; + + if (!vdev->vm_running) { + should_start = false; + } + + if (s->dev.started == should_start) { + return; + } + + if (should_start) { + vhost_user_blk_start(vdev); + } else { + vhost_user_blk_stop(vdev); + } + +} + +static uint64_t vhost_user_blk_get_features(VirtIODevice *vdev, + uint64_t features, + Error **errp) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + uint64_t get_features; + + /* Turn on pre-defined features */ + virtio_add_feature(&features, VIRTIO_BLK_F_SEG_MAX); + virtio_add_feature(&features, VIRTIO_BLK_F_GEOMETRY); + virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY); + virtio_add_feature(&features, VIRTIO_BLK_F_BLK_SIZE); + virtio_add_feature(&features, VIRTIO_BLK_F_FLUSH); + + if (s->config_wce) { + virtio_add_feature(&features, VIRTIO_BLK_F_CONFIG_WCE); + } + if (s->config_ro) { + virtio_add_feature(&features, VIRTIO_BLK_F_RO); + } + if (s->num_queues > 1) { + virtio_add_feature(&features, VIRTIO_BLK_F_MQ); + } + + get_features = vhost_get_features(&s->dev, user_feature_bits, features); + + return get_features; +} + +static void vhost_user_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) +{ + +} + +static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VHostUserBlk *s = VHOST_USER_BLK(vdev); + int i, ret; + + if (!s->chardev.chr) { + error_setg(errp, "vhost-user-blk: chardev is mandatory"); + return; + } + + if (!s->num_queues || s->num_queues > VIRTIO_QUEUE_MAX) { + error_setg(errp, "vhost-user-blk: invalid number of IO queues"); + return; + } + + if (!s->queue_size) { + error_setg(errp, "vhost-user-blk: queue size must be non-zero"); + return; + } + + virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK, + sizeof(struct virtio_blk_config)); + + for (i = 0; i < s->num_queues; i++) { + virtio_add_queue(vdev, s->queue_size, + vhost_user_blk_handle_output); + } + + s->dev.nvqs = s->num_queues; + s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs); + s->dev.vq_index = 0; + s->dev.backend_features = 0; + + ret = vhost_dev_init(&s->dev, &s->chardev, VHOST_BACKEND_TYPE_USER, 0); + if (ret < 0) { + error_setg(errp, "vhost-user-blk: vhost initialization failed: %s", + strerror(-ret)); + goto virtio_err; + } + + ret = vhost_dev_get_config(&s->dev, (uint8_t *)&s->blkcfg, + sizeof(struct virtio_blk_config)); + if (ret < 0) { + error_setg(errp, "vhost-user-blk: get block config failed"); + goto vhost_err; + } + + if (s->blkcfg.num_queues != s->num_queues) { + s->blkcfg.num_queues = s->num_queues; + } + + vhost_dev_set_config_notifier(&s->dev, &blk_ops); + + return; + +vhost_err: + vhost_dev_cleanup(&s->dev); +virtio_err: + g_free(s->dev.vqs); + virtio_cleanup(vdev); +} + +static void vhost_user_blk_device_unrealize(DeviceState *dev, Error **errp) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VHostUserBlk *s = VHOST_USER_BLK(dev); + + vhost_user_blk_set_status(vdev, 0); + vhost_dev_cleanup(&s->dev); + g_free(s->dev.vqs); + virtio_cleanup(vdev); +} + +static void vhost_user_blk_instance_init(Object *obj) +{ + VHostUserBlk *s = VHOST_USER_BLK(obj); + + device_add_bootindex_property(obj, &s->bootindex, "bootindex", + "/disk@0,0", DEVICE(obj), NULL); +} + +static const VMStateDescription vmstate_vhost_user_blk = { + .name = "vhost-user-blk", + .minimum_version_id = 1, + .version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_VIRTIO_DEVICE, + VMSTATE_END_OF_LIST() + }, +}; + +static Property vhost_user_blk_properties[] = { + DEFINE_PROP_CHR("chardev", VHostUserBlk, chardev), + DEFINE_PROP_UINT16("num-queues", VHostUserBlk, num_queues, 1), + DEFINE_PROP_UINT32("queue-size", VHostUserBlk, queue_size, 128), + DEFINE_PROP_BIT("config-wce", VHostUserBlk, config_wce, 0, true), + DEFINE_PROP_BIT("config-ro", VHostUserBlk, config_ro, 0, false), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_user_blk_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); + + dc->props = vhost_user_blk_properties; + dc->vmsd = &vmstate_vhost_user_blk; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + vdc->realize = vhost_user_blk_device_realize; + vdc->unrealize = vhost_user_blk_device_unrealize; + vdc->get_config = vhost_user_blk_update_config; + vdc->set_config = vhost_user_blk_set_config; + vdc->get_features = vhost_user_blk_get_features; + vdc->set_status = vhost_user_blk_set_status; +} + +static const TypeInfo vhost_user_blk_info = { + .name = TYPE_VHOST_USER_BLK, + .parent = TYPE_VIRTIO_DEVICE, + .instance_size = sizeof(VHostUserBlk), + .instance_init = vhost_user_blk_instance_init, + .class_init = vhost_user_blk_class_init, +}; + +static void virtio_register_types(void) +{ + type_register_static(&vhost_user_blk_info); +} + +type_init(virtio_register_types) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index e92837c..b5e05d9 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1976,6 +1976,58 @@ static const TypeInfo virtio_blk_pci_info = { .class_init = virtio_blk_pci_class_init, }; +#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) +/* vhost-user-blk */ + +static Property vhost_user_blk_pci_properties[] = { + DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) +{ + VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + + qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", errp); +} + +static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); + PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); + + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + dc->props = vhost_user_blk_pci_properties; + k->realize = vhost_user_blk_pci_realize; + pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; + pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; + pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; + pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; +} + +static void vhost_user_blk_pci_instance_init(Object *obj) +{ + VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VHOST_USER_BLK); + object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), + "bootindex", &error_abort); +} + +static const TypeInfo vhost_user_blk_pci_info = { + .name = TYPE_VHOST_USER_BLK_PCI, + .parent = TYPE_VIRTIO_PCI, + .instance_size = sizeof(VHostUserBlkPCI), + .instance_init = vhost_user_blk_pci_instance_init, + .class_init = vhost_user_blk_pci_class_init, +}; +#endif + /* virtio-scsi-pci */ static Property virtio_scsi_pci_properties[] = { @@ -2622,6 +2674,9 @@ static void virtio_pci_register_types(void) type_register_static(&virtio_9p_pci_info); #endif type_register_static(&virtio_blk_pci_info); +#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) + type_register_static(&vhost_user_blk_pci_info); +#endif type_register_static(&virtio_scsi_pci_info); type_register_static(&virtio_balloon_pci_info); type_register_static(&virtio_serial_pci_info); diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index 12d3a90..813082b 100644 --- a/hw/virtio/virtio-pci.h +++ b/hw/virtio/virtio-pci.h @@ -27,6 +27,9 @@ #include "hw/virtio/virtio-gpu.h" #include "hw/virtio/virtio-crypto.h" #include "hw/virtio/vhost-user-scsi.h" +#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) +#include "hw/virtio/vhost-user-blk.h" +#endif #ifdef CONFIG_VIRTFS #include "hw/9pfs/virtio-9p.h" @@ -46,6 +49,7 @@ typedef struct VirtIOSerialPCI VirtIOSerialPCI; typedef struct VirtIONetPCI VirtIONetPCI; typedef struct VHostSCSIPCI VHostSCSIPCI; typedef struct VHostUserSCSIPCI VHostUserSCSIPCI; +typedef struct VHostUserBlkPCI VHostUserBlkPCI; typedef struct VirtIORngPCI VirtIORngPCI; typedef struct VirtIOInputPCI VirtIOInputPCI; typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI; @@ -244,6 +248,20 @@ struct VHostUserSCSIPCI { VHostUserSCSI vdev; }; +#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) +/* + * vhost-user-blk-pci: This extends VirtioPCIProxy. + */ +#define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci" +#define VHOST_USER_BLK_PCI(obj) \ + OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI) + +struct VHostUserBlkPCI { + VirtIOPCIProxy parent_obj; + VHostUserBlk vdev; +}; +#endif + /* * virtio-blk-pci: This extends VirtioPCIProxy. */ diff --git a/include/hw/virtio/vhost-user-blk.h b/include/hw/virtio/vhost-user-blk.h new file mode 100644 index 0000000..a120b06 --- /dev/null +++ b/include/hw/virtio/vhost-user-blk.h @@ -0,0 +1,42 @@ +/* + * vhost-user-blk host device + * Copyright(C) 2017 Intel Corporation. + * + * Authors: + * Changpeng Liu + * + * Based on "vhost-scsi.h" implemention 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_BLK_H +#define VHOST_USER_BLK_H + +#include "standard-headers/linux/virtio_blk.h" +#include "qemu-common.h" +#include "hw/qdev.h" +#include "hw/block/block.h" +#include "chardev/char-fe.h" +#include "hw/virtio/vhost.h" + +#define TYPE_VHOST_USER_BLK "vhost-user-blk" +#define VHOST_USER_BLK(obj) \ + OBJECT_CHECK(VHostUserBlk, (obj), TYPE_VHOST_USER_BLK) + +typedef struct VHostUserBlk { + VirtIODevice parent_obj; + CharBackend chardev; + int32_t bootindex; + struct virtio_blk_config blkcfg; + uint16_t num_queues; + uint32_t queue_size; + uint32_t config_wce; + uint32_t config_ro; + struct vhost_dev dev; +} VHostUserBlk; + +#endif