LXR qemu/include/hw/virtio/vhost-user-blk.h

   1/*
   2 * vhost-user-blk host device
   3 * Copyright(C) 2017 Intel Corporation.
   4 *
   5 * Authors:
   6 *  Changpeng Liu <changpeng.liu@intel.com>
   7 *
   8 * Based on vhost-scsi.h, Copyright IBM, Corp. 2011
   9 *
  10 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  11 * See the COPYING.LIB file in the top-level directory.
  12 *
  13 */
  14
  15#ifndef VHOST_USER_BLK_H
  16#define VHOST_USER_BLK_H
  17
  18#include "standard-headers/linux/virtio_blk.h"
  19#include "hw/block/block.h"
  20#include "chardev/char-fe.h"
  21#include "hw/virtio/vhost.h"
  22#include "hw/virtio/vhost-user.h"
  23#include "qom/object.h"
  24
  25#define TYPE_VHOST_USER_BLK "vhost-user-blk"
  26OBJECT_DECLARE_SIMPLE_TYPE(VHostUserBlk, VHOST_USER_BLK)
  27
  28#define VHOST_USER_BLK_AUTO_NUM_QUEUES UINT16_MAX
  29
  30struct VHostUserBlk {
  31    VirtIODevice parent_obj;
  32    CharBackend chardev;
  33    int32_t bootindex;
  34    struct virtio_blk_config blkcfg;
  35    uint16_t num_queues;
  36    uint32_t queue_size;
  37    uint32_t config_wce;
  38    struct vhost_dev dev;
  39    struct vhost_inflight *inflight;
  40    VhostUserState vhost_user;
  41    struct vhost_virtqueue *vhost_vqs;
  42    VirtQueue **virtqs;
  43
  44    /*
  45     * There are at least two steps of initialization of the
  46     * vhost-user device. The first is a "connect" step and
  47     * second is a "start" step. Make a separation between
  48     * those initialization phases by using two fields.
  49     */
  50    /* vhost_user_blk_connect/vhost_user_blk_disconnect */
  51    bool connected;
  52    /* vhost_user_blk_start/vhost_user_blk_stop */
  53    bool started_vu;
  54};
  55
  56#endif
  57