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 struct vhost_dev dev; 38 struct vhost_inflight *inflight; 39 VhostUserState vhost_user; 40 struct vhost_virtqueue *vhost_vqs; 41 VirtQueue **virtqs; 42 43 /* 44 * There are at least two steps of initialization of the 45 * vhost-user device. The first is a "connect" step and 46 * second is a "start" step. Make a separation between 47 * those initialization phases by using two fields. 48 */ 49 /* vhost_user_blk_connect/vhost_user_blk_disconnect */ 50 bool connected; 51 /* vhost_user_blk_start/vhost_user_blk_stop */ 52 bool started_vu; 53 }; 54 55 #endif 56