applied using ./scripts/clean-includes Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Ben Warren <ben@skyportsystems.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
207 lines
6.3 KiB
C
207 lines
6.3 KiB
C
/*
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* vhost-user-scsi host device
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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 "qapi/error.h"
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#include "qemu/error-report.h"
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#include "qom/object.h"
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#include "hw/fw-path-provider.h"
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#include "hw/qdev-core.h"
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#include "hw/virtio/vhost.h"
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#include "hw/virtio/vhost-backend.h"
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#include "hw/virtio/vhost-user-scsi.h"
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#include "hw/virtio/virtio.h"
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#include "hw/virtio/virtio-access.h"
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#include "chardev/char-fe.h"
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/* Features supported by the host application */
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static const int user_feature_bits[] = {
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VIRTIO_F_NOTIFY_ON_EMPTY,
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VIRTIO_RING_F_INDIRECT_DESC,
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VIRTIO_RING_F_EVENT_IDX,
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VIRTIO_SCSI_F_HOTPLUG,
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VHOST_INVALID_FEATURE_BIT
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};
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static void vhost_user_scsi_set_status(VirtIODevice *vdev, uint8_t status)
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{
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VHostUserSCSI *s = (VHostUserSCSI *)vdev;
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
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bool start = (status & VIRTIO_CONFIG_S_DRIVER_OK) && vdev->vm_running;
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if (vsc->dev.started == start) {
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return;
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}
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if (start) {
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int ret;
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ret = vhost_scsi_common_start(vsc);
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if (ret < 0) {
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error_report("unable to start vhost-user-scsi: %s", strerror(-ret));
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exit(1);
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}
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} else {
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vhost_scsi_common_stop(vsc);
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}
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}
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static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
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{
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}
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static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
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{
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
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VHostUserSCSI *s = VHOST_USER_SCSI(dev);
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
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Error *err = NULL;
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int ret;
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if (!vs->conf.chardev.chr) {
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error_setg(errp, "vhost-user-scsi: missing chardev");
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return;
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}
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virtio_scsi_common_realize(dev, vhost_dummy_handle_output,
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vhost_dummy_handle_output,
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vhost_dummy_handle_output, &err);
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if (err != NULL) {
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error_propagate(errp, err);
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return;
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}
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vsc->dev.nvqs = 2 + 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(&vsc->dev, (void *)&vs->conf.chardev,
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VHOST_BACKEND_TYPE_USER, 0);
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if (ret < 0) {
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error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s",
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strerror(-ret));
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return;
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}
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/* Channel and lun both are 0 for bootable vhost-user-scsi disk */
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vsc->channel = 0;
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vsc->lun = 0;
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vsc->target = vs->conf.boot_tpgt;
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}
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static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
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{
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VirtIODevice *vdev = VIRTIO_DEVICE(dev);
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VHostUserSCSI *s = VHOST_USER_SCSI(dev);
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
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/* This will stop the vhost backend. */
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vhost_user_scsi_set_status(vdev, 0);
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vhost_dev_cleanup(&vsc->dev);
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g_free(vsc->dev.vqs);
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virtio_scsi_common_unrealize(dev, errp);
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}
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static uint64_t vhost_user_scsi_get_features(VirtIODevice *vdev,
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uint64_t features, Error **errp)
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{
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VHostUserSCSI *s = VHOST_USER_SCSI(vdev);
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/* Turn on predefined features supported by this device */
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features |= s->host_features;
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return vhost_scsi_common_get_features(vdev, features, errp);
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}
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static Property vhost_user_scsi_properties[] = {
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DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev),
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DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0),
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DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1),
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DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size,
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128),
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DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors,
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0xFFFF),
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DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, 128),
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DEFINE_PROP_BIT64("hotplug", VHostUserSCSI, host_features,
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VIRTIO_SCSI_F_HOTPLUG,
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true),
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DEFINE_PROP_BIT64("param_change", VHostUserSCSI, host_features,
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VIRTIO_SCSI_F_CHANGE,
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true),
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DEFINE_PROP_END_OF_LIST(),
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};
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static const VMStateDescription vmstate_vhost_scsi = {
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.name = "virtio-scsi",
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.minimum_version_id = 1,
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.version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_VIRTIO_DEVICE,
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VMSTATE_END_OF_LIST()
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},
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};
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static void vhost_user_scsi_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
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FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
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dc->props = vhost_user_scsi_properties;
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dc->vmsd = &vmstate_vhost_scsi;
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set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
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vdc->realize = vhost_user_scsi_realize;
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vdc->unrealize = vhost_user_scsi_unrealize;
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vdc->get_features = vhost_user_scsi_get_features;
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vdc->set_config = vhost_scsi_common_set_config;
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vdc->set_status = vhost_user_scsi_set_status;
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fwc->get_dev_path = vhost_scsi_common_get_fw_dev_path;
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}
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static void vhost_user_scsi_instance_init(Object *obj)
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{
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VHostSCSICommon *vsc = VHOST_SCSI_COMMON(obj);
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vsc->feature_bits = user_feature_bits;
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/* Add the bootindex property for this object */
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device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL,
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DEVICE(vsc), NULL);
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}
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static const TypeInfo vhost_user_scsi_info = {
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.name = TYPE_VHOST_USER_SCSI,
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.parent = TYPE_VHOST_SCSI_COMMON,
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.instance_size = sizeof(VHostUserSCSI),
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.class_init = vhost_user_scsi_class_init,
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.instance_init = vhost_user_scsi_instance_init,
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.interfaces = (InterfaceInfo[]) {
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{ TYPE_FW_PATH_PROVIDER },
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{ }
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},
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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_user_scsi_info);
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}
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type_init(virtio_register_types)
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