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
57