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"
  26 OBJECT_DECLARE_SIMPLE_TYPE(VHostUserBlk, VHOST_USER_BLK)
  27
  28 #define VHOST_USER_BLK_AUTO_NUM_QUEUES UINT16_MAX
  29
  30 struct 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