mirror of https://gitee.com/openkylin/qemu.git
vhost-scsi: create a vhost-scsi-common abstraction
In order to introduce a new vhost-user-scsi host device type, it makes sense to abstract part of vhost-scsi into a common parent class. This commit does exactly that. Signed-off-by: Felipe Franciosi <felipe@nutanix.com> Message-Id: <1488479153-21203-3-git-send-email-felipe@nutanix.com>
This commit is contained in:
Felipe Franciosi
Paolo Bonzini
parent
eae0f54334
commit
95615ce5a1
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@ -10,5 +10,5 @@ obj-$(CONFIG_PSERIES) += spapr_vscsi.o
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ifeq ($(CONFIG_VIRTIO),y)
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obj-y += virtio-scsi.o virtio-scsi-dataplane.o
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obj-$(CONFIG_VHOST_SCSI) += vhost-scsi.o
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obj-$(CONFIG_VHOST_SCSI) += vhost-scsi-common.o vhost-scsi.o
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endif
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@ -0,0 +1,143 @@
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/*
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* vhost-scsi-common
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*
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* Copyright (c) 2016 Nutanix Inc. All rights reserved.
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*
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* Author:
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* Felipe Franciosi <felipe@nutanix.com>
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*
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* This work is largely based on the "vhost-scsi" implementation by:
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* Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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* Nicholas Bellinger <nab@risingtidesystems.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include <linux/vhost.h>
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#include "qapi/error.h"
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#include "qemu/error-report.h"
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#include "migration/migration.h"
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#include "hw/virtio/vhost.h"
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#include "hw/virtio/vhost-scsi-common.h"
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#include "hw/virtio/virtio-scsi.h"
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#include "hw/virtio/virtio-bus.h"
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#include "hw/virtio/virtio-access.h"
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#include "hw/fw-path-provider.h"
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int vhost_scsi_common_start(VHostSCSICommon *vsc)
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{
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int ret, i;
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VirtIODevice *vdev = VIRTIO_DEVICE(vsc);
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BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
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VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
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if (!k->set_guest_notifiers) {
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error_report("binding does not support guest notifiers");
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return -ENOSYS;
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}
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ret = vhost_dev_enable_notifiers(&vsc->dev, vdev);
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if (ret < 0) {
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return ret;
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}
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ret = k->set_guest_notifiers(qbus->parent, vsc->dev.nvqs, true);
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if (ret < 0) {
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error_report("Error binding guest notifier");
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goto err_host_notifiers;
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}
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vsc->dev.acked_features = vdev->guest_features;
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ret = vhost_dev_start(&vsc->dev, vdev);
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if (ret < 0) {
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error_report("Error start vhost dev");
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goto err_guest_notifiers;
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}
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/* guest_notifier_mask/pending not used yet, so just unmask
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* everything here. virtio-pci will do the right thing by
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* enabling/disabling irqfd.
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*/
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for (i = 0; i < vsc->dev.nvqs; i++) {
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vhost_virtqueue_mask(&vsc->dev, vdev, vsc->dev.vq_index + i, false);
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}
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return ret;
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err_guest_notifiers:
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k->set_guest_notifiers(qbus->parent, vsc->dev.nvqs, false);
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err_host_notifiers:
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vhost_dev_disable_notifiers(&vsc->dev, vdev);
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return ret;
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}
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void vhost_scsi_common_stop(VHostSCSICommon *vsc)
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{
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VirtIODevice *vdev = VIRTIO_DEVICE(vsc);
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BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
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VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
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int ret = 0;
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vhost_dev_stop(&vsc->dev, vdev);
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if (k->set_guest_notifiers) {
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ret = k->set_guest_notifiers(qbus->parent, vsc->dev.nvqs, false);
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if (ret < 0) {
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error_report("vhost guest notifier cleanup failed: %d", ret);
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}
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}
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assert(ret >= 0);
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vhost_dev_disable_notifiers(&vsc->dev, vdev);
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}
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uint64_t vhost_scsi_common_get_features(VirtIODevice *vdev, uint64_t features,
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Error **errp)
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{
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(vdev);
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return vhost_get_features(&vsc->dev, vsc->feature_bits, features);
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}
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void vhost_scsi_common_set_config(VirtIODevice *vdev, const uint8_t *config)
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{
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VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config;
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
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if ((uint32_t)virtio_ldl_p(vdev, &scsiconf->sense_size) != vs->sense_size ||
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(uint32_t)virtio_ldl_p(vdev, &scsiconf->cdb_size) != vs->cdb_size) {
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error_report("vhost-scsi does not support changing the sense data and "
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"CDB sizes");
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exit(1);
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}
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}
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/*
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* Implementation of an interface to adjust firmware path
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* for the bootindex property handling.
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*/
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char *vhost_scsi_common_get_fw_dev_path(FWPathProvider *p, BusState *bus,
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DeviceState *dev)
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{
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(dev);
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/* format: /channel@channel/vhost-scsi@target,lun */
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return g_strdup_printf("/channel@%x/%s@%x,%x", vsc->channel,
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qdev_fw_name(dev), vsc->target, vsc->lun);
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}
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static const TypeInfo vhost_scsi_common_info = {
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.name = TYPE_VHOST_SCSI_COMMON,
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.parent = TYPE_VIRTIO_SCSI_COMMON,
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.instance_size = sizeof(VHostSCSICommon),
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.abstract = true,
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};
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static void virtio_register_types(void)
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{
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type_register_static(&vhost_scsi_common_info);
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}
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type_init(virtio_register_types)
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@ -42,13 +42,14 @@ static const int kernel_feature_bits[] = {
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static int vhost_scsi_set_endpoint(VHostSCSI *s)
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{
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
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const VhostOps *vhost_ops = s->dev.vhost_ops;
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
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const VhostOps *vhost_ops = vsc->dev.vhost_ops;
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struct vhost_scsi_target backend;
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int ret;
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memset(&backend, 0, sizeof(backend));
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pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
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ret = vhost_ops->vhost_scsi_set_endpoint(&s->dev, &backend);
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ret = vhost_ops->vhost_scsi_set_endpoint(&vsc->dev, &backend);
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if (ret < 0) {
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return -errno;
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}
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@ -58,130 +59,62 @@ static int vhost_scsi_set_endpoint(VHostSCSI *s)
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static void vhost_scsi_clear_endpoint(VHostSCSI *s)
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{
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
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struct vhost_scsi_target backend;
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const VhostOps *vhost_ops = s->dev.vhost_ops;
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const VhostOps *vhost_ops = vsc->dev.vhost_ops;
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memset(&backend, 0, sizeof(backend));
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pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
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vhost_ops->vhost_scsi_clear_endpoint(&s->dev, &backend);
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vhost_ops->vhost_scsi_clear_endpoint(&vsc->dev, &backend);
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}
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static int vhost_scsi_start(VHostSCSI *s)
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{
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int ret, abi_version, i;
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VirtIODevice *vdev = VIRTIO_DEVICE(s);
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BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
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VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
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const VhostOps *vhost_ops = s->dev.vhost_ops;
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int ret, abi_version;
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
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const VhostOps *vhost_ops = vsc->dev.vhost_ops;
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if (!k->set_guest_notifiers) {
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error_report("binding does not support guest notifiers");
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return -ENOSYS;
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}
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ret = vhost_ops->vhost_scsi_get_abi_version(&s->dev, &abi_version);
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ret = vhost_ops->vhost_scsi_get_abi_version(&vsc->dev, &abi_version);
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if (ret < 0) {
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return -errno;
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}
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if (abi_version > VHOST_SCSI_ABI_VERSION) {
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error_report("vhost-scsi: The running tcm_vhost kernel abi_version:"
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" %d is greater than vhost_scsi userspace supports: %d, please"
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" upgrade your version of QEMU", abi_version,
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" %d is greater than vhost_scsi userspace supports: %d,"
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" please upgrade your version of QEMU", abi_version,
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VHOST_SCSI_ABI_VERSION);
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return -ENOSYS;
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}
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ret = vhost_dev_enable_notifiers(&s->dev, vdev);
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ret = vhost_scsi_common_start(vsc);
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if (ret < 0) {
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return ret;
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}
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s->dev.acked_features = vdev->guest_features;
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ret = vhost_dev_start(&s->dev, vdev);
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if (ret < 0) {
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error_report("Error start vhost dev");
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goto err_notifiers;
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}
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ret = vhost_scsi_set_endpoint(s);
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if (ret < 0) {
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error_report("Error set vhost-scsi endpoint");
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goto err_vhost_stop;
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error_report("Error setting vhost-scsi endpoint");
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vhost_scsi_common_stop(vsc);
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}
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ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true);
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if (ret < 0) {
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error_report("Error binding guest notifier");
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goto err_endpoint;
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}
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/* guest_notifier_mask/pending not used yet, so just unmask
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* everything here. virtio-pci will do the right thing by
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* enabling/disabling irqfd.
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*/
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for (i = 0; i < s->dev.nvqs; i++) {
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vhost_virtqueue_mask(&s->dev, vdev, s->dev.vq_index + i, false);
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}
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return ret;
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err_endpoint:
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vhost_scsi_clear_endpoint(s);
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err_vhost_stop:
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vhost_dev_stop(&s->dev, vdev);
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err_notifiers:
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vhost_dev_disable_notifiers(&s->dev, vdev);
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return ret;
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}
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static void vhost_scsi_stop(VHostSCSI *s)
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{
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VirtIODevice *vdev = VIRTIO_DEVICE(s);
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BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
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VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
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int ret = 0;
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if (k->set_guest_notifiers) {
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ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false);
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if (ret < 0) {
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error_report("vhost guest notifier cleanup failed: %d", ret);
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}
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}
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assert(ret >= 0);
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
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vhost_scsi_clear_endpoint(s);
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vhost_dev_stop(&s->dev, vdev);
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vhost_dev_disable_notifiers(&s->dev, vdev);
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}
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static uint64_t vhost_scsi_get_features(VirtIODevice *vdev,
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uint64_t features,
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Error **errp)
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{
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VHostSCSI *s = VHOST_SCSI(vdev);
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return vhost_get_features(&s->dev, kernel_feature_bits, features);
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}
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static void vhost_scsi_set_config(VirtIODevice *vdev,
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const uint8_t *config)
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{
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VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config;
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
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if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) != vs->sense_size ||
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(uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) != vs->cdb_size) {
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error_report("vhost-scsi does not support changing the sense data and CDB sizes");
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exit(1);
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}
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vhost_scsi_common_stop(vsc);
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}
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static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val)
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{
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VHostSCSI *s = (VHostSCSI *)vdev;
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VHostSCSI *s = VHOST_SCSI(vdev);
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
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bool start = (val & VIRTIO_CONFIG_S_DRIVER_OK);
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if (s->dev.started == start) {
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if (vsc->dev.started == start) {
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return;
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}
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@ -190,10 +123,7 @@ static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val)
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ret = vhost_scsi_start(s);
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if (ret < 0) {
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error_report("virtio-scsi: unable to start vhost: %s",
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strerror(-ret));
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/* There is no userspace virtio-scsi fallback so exit */
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error_report("unable to start vhost-scsi: %s", strerror(-ret));
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exit(1);
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}
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} else {
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@ -208,7 +138,7 @@ static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
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static void vhost_scsi_realize(DeviceState *dev, Error **errp)
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{
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
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VHostSCSI *s = VHOST_SCSI(dev);
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(dev);
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Error *err = NULL;
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int vhostfd = -1;
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int ret;
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@ -243,21 +173,21 @@ static void vhost_scsi_realize(DeviceState *dev, Error **errp)
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goto close_fd;
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}
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error_setg(&s->migration_blocker,
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error_setg(&vsc->migration_blocker,
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"vhost-scsi does not support migration");
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migrate_add_blocker(s->migration_blocker, &err);
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migrate_add_blocker(vsc->migration_blocker, &err);
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if (err) {
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error_propagate(errp, err);
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error_free(s->migration_blocker);
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error_free(vsc->migration_blocker);
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goto close_fd;
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}
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s->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.num_queues;
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s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs);
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s->dev.vq_index = 0;
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s->dev.backend_features = 0;
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vsc->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.num_queues;
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vsc->dev.vqs = g_new(struct vhost_virtqueue, vsc->dev.nvqs);
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vsc->dev.vq_index = 0;
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vsc->dev.backend_features = 0;
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ret = vhost_dev_init(&s->dev, (void *)(uintptr_t)vhostfd,
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ret = vhost_dev_init(&vsc->dev, (void *)(uintptr_t)vhostfd,
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VHOST_BACKEND_TYPE_KERNEL, 0);
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if (ret < 0) {
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error_setg(errp, "vhost-scsi: vhost initialization failed: %s",
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@ -266,16 +196,16 @@ static void vhost_scsi_realize(DeviceState *dev, Error **errp)
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}
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/* At present, channel and lun both are 0 for bootable vhost-scsi disk */
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s->channel = 0;
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s->lun = 0;
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vsc->channel = 0;
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vsc->lun = 0;
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/* Note: we can also get the minimum tpgt from kernel */
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s->target = vs->conf.boot_tpgt;
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vsc->target = vs->conf.boot_tpgt;
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return;
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free_vqs:
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migrate_del_blocker(s->migration_blocker);
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g_free(s->dev.vqs);
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migrate_del_blocker(vsc->migration_blocker);
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g_free(vsc->dev.vqs);
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close_fd:
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close(vhostfd);
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return;
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|
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@ -284,42 +214,28 @@ static void vhost_scsi_realize(DeviceState *dev, Error **errp)
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static void vhost_scsi_unrealize(DeviceState *dev, Error **errp)
|
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{
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VirtIODevice *vdev = VIRTIO_DEVICE(dev);
|
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VHostSCSI *s = VHOST_SCSI(dev);
|
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(dev);
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|
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migrate_del_blocker(s->migration_blocker);
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error_free(s->migration_blocker);
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migrate_del_blocker(vsc->migration_blocker);
|
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error_free(vsc->migration_blocker);
|
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|
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/* This will stop vhost backend. */
|
||||
vhost_scsi_set_status(vdev, 0);
|
||||
|
||||
vhost_dev_cleanup(&s->dev);
|
||||
g_free(s->dev.vqs);
|
||||
vhost_dev_cleanup(&vsc->dev);
|
||||
g_free(vsc->dev.vqs);
|
||||
|
||||
virtio_scsi_common_unrealize(dev, errp);
|
||||
}
|
||||
|
||||
/*
|
||||
* Implementation of an interface to adjust firmware path
|
||||
* for the bootindex property handling.
|
||||
*/
|
||||
static char *vhost_scsi_get_fw_dev_path(FWPathProvider *p, BusState *bus,
|
||||
DeviceState *dev)
|
||||
{
|
||||
VHostSCSI *s = VHOST_SCSI(dev);
|
||||
/* format: channel@channel/vhost-scsi@target,lun */
|
||||
return g_strdup_printf("/channel@%x/%s@%x,%x", s->channel,
|
||||
qdev_fw_name(dev), s->target, s->lun);
|
||||
}
|
||||
|
||||
static Property vhost_scsi_properties[] = {
|
||||
DEFINE_PROP_STRING("vhostfd", VHostSCSI, parent_obj.conf.vhostfd),
|
||||
DEFINE_PROP_STRING("wwpn", VHostSCSI, parent_obj.conf.wwpn),
|
||||
DEFINE_PROP_UINT32("boot_tpgt", VHostSCSI, parent_obj.conf.boot_tpgt, 0),
|
||||
DEFINE_PROP_UINT32("num_queues", VHostSCSI, parent_obj.conf.num_queues, 1),
|
||||
DEFINE_PROP_UINT32("max_sectors", VHostSCSI, parent_obj.conf.max_sectors,
|
||||
DEFINE_PROP_STRING("vhostfd", VirtIOSCSICommon, conf.vhostfd),
|
||||
DEFINE_PROP_STRING("wwpn", VirtIOSCSICommon, conf.wwpn),
|
||||
DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0),
|
||||
DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1),
|
||||
DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors,
|
||||
0xFFFF),
|
||||
DEFINE_PROP_UINT32("cmd_per_lun", VHostSCSI, parent_obj.conf.cmd_per_lun,
|
||||
128),
|
||||
DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, 128),
|
||||
DEFINE_PROP_END_OF_LIST(),
|
||||
};
|
||||
|
||||
|
|
@ -333,23 +249,25 @@ static void vhost_scsi_class_init(ObjectClass *klass, void *data)
|
|||
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
|
||||
vdc->realize = vhost_scsi_realize;
|
||||
vdc->unrealize = vhost_scsi_unrealize;
|
||||
vdc->get_features = vhost_scsi_get_features;
|
||||
vdc->set_config = vhost_scsi_set_config;
|
||||
vdc->get_features = vhost_scsi_common_get_features;
|
||||
vdc->set_config = vhost_scsi_common_set_config;
|
||||
vdc->set_status = vhost_scsi_set_status;
|
||||
fwc->get_dev_path = vhost_scsi_get_fw_dev_path;
|
||||
fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
|
||||
}
|
||||
|
||||
static void vhost_scsi_instance_init(Object *obj)
|
||||
{
|
||||
VHostSCSI *dev = VHOST_SCSI(obj);
|
||||
VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
|
||||
|
||||
device_add_bootindex_property(obj, &dev->bootindex, "bootindex", NULL,
|
||||
DEVICE(dev), NULL);
|
||||
vsc->feature_bits = kernel_feature_bits;
|
||||
|
||||
device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
|
||||
DEVICE(vsc), NULL);
|
||||
}
|
||||
|
||||
static const TypeInfo vhost_scsi_info = {
|
||||
.name = TYPE_VHOST_SCSI,
|
||||
.parent = TYPE_VIRTIO_SCSI_COMMON,
|
||||
.parent = TYPE_VHOST_SCSI_COMMON,
|
||||
.instance_size = sizeof(VHostSCSI),
|
||||
.class_init = vhost_scsi_class_init,
|
||||
.instance_init = vhost_scsi_instance_init,
|
||||
|
|
|
|||
|
|
@ -0,0 +1,48 @@
|
|||
/*
|
||||
* vhost_scsi host device
|
||||
*
|
||||
* Copyright (c) 2016 Nutanix Inc. All rights reserved.
|
||||
*
|
||||
* Author:
|
||||
* Felipe Franciosi <felipe@nutanix.com>
|
||||
*
|
||||
* 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_SCSI_COMMON_H
|
||||
#define VHOST_SCSI_COMMON_H
|
||||
|
||||
#include "qemu-common.h"
|
||||
#include "hw/qdev.h"
|
||||
#include "hw/virtio/virtio-scsi.h"
|
||||
#include "hw/virtio/vhost.h"
|
||||
#include "hw/fw-path-provider.h"
|
||||
|
||||
#define TYPE_VHOST_SCSI_COMMON "vhost-scsi-common"
|
||||
#define VHOST_SCSI_COMMON(obj) \
|
||||
OBJECT_CHECK(VHostSCSICommon, (obj), TYPE_VHOST_SCSI_COMMON)
|
||||
|
||||
typedef struct VHostSCSICommon {
|
||||
VirtIOSCSICommon parent_obj;
|
||||
|
||||
Error *migration_blocker;
|
||||
|
||||
struct vhost_dev dev;
|
||||
const int *feature_bits;
|
||||
int32_t bootindex;
|
||||
int channel;
|
||||
int target;
|
||||
int lun;
|
||||
} VHostSCSICommon;
|
||||
|
||||
int vhost_scsi_common_start(VHostSCSICommon *vsc);
|
||||
void vhost_scsi_common_stop(VHostSCSICommon *vsc);
|
||||
char *vhost_scsi_common_get_fw_dev_path(FWPathProvider *p, BusState *bus,
|
||||
DeviceState *dev);
|
||||
void vhost_scsi_common_set_config(VirtIODevice *vdev, const uint8_t *config);
|
||||
uint64_t vhost_scsi_common_get_features(VirtIODevice *vdev, uint64_t features,
|
||||
Error **errp);
|
||||
|
||||
#endif /* VHOST_SCSI_COMMON_H */
|
||||
|
|
@ -18,6 +18,7 @@
|
|||
#include "hw/qdev.h"
|
||||
#include "hw/virtio/virtio-scsi.h"
|
||||
#include "hw/virtio/vhost.h"
|
||||
#include "hw/virtio/vhost-scsi-common.h"
|
||||
|
||||
enum vhost_scsi_vq_list {
|
||||
VHOST_SCSI_VQ_CONTROL = 0,
|
||||
|
|
@ -30,15 +31,7 @@ enum vhost_scsi_vq_list {
|
|||
OBJECT_CHECK(VHostSCSI, (obj), TYPE_VHOST_SCSI)
|
||||
|
||||
typedef struct VHostSCSI {
|
||||
VirtIOSCSICommon parent_obj;
|
||||
|
||||
Error *migration_blocker;
|
||||
|
||||
struct vhost_dev dev;
|
||||
int32_t bootindex;
|
||||
int channel;
|
||||
int target;
|
||||
int lun;
|
||||
VHostSCSICommon parent_obj;
|
||||
} VHostSCSI;
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -49,8 +49,10 @@ struct VirtIOSCSIConf {
|
|||
uint32_t num_queues;
|
||||
uint32_t max_sectors;
|
||||
uint32_t cmd_per_lun;
|
||||
#ifdef CONFIG_VHOST_SCSI
|
||||
char *vhostfd;
|
||||
char *wwpn;
|
||||
#endif
|
||||
uint32_t boot_tpgt;
|
||||
IOThread *iothread;
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in New Issue