ceph/src/spdk/lib/virtio/virtio_user/vhost.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef _VHOST_NET_USER_H
  35 #define _VHOST_NET_USER_H
  36
  37 #include "spdk/stdinc.h"
  38
  39 #include "spdk_internal/log.h"
  40 #include "spdk_internal/virtio.h"
  41 #include "spdk_internal/vhost_user.h"
  42
  43 struct virtio_user_backend_ops;
  44
  45 struct virtio_user_dev {
  46         int             vhostfd;
  47
  48         int             callfds[SPDK_VIRTIO_MAX_VIRTQUEUES];
  49         int             kickfds[SPDK_VIRTIO_MAX_VIRTQUEUES];
  50         uint32_t        queue_size;
  51
  52         uint8_t         status;
  53         char            path[PATH_MAX];
  54         uint64_t        protocol_features;
  55         struct vring    vrings[SPDK_VIRTIO_MAX_VIRTQUEUES];
  56         struct virtio_user_backend_ops *ops;
  57         struct spdk_mem_map *mem_map;
  58 };
  59
  60 struct virtio_user_backend_ops {
  61         int (*setup)(struct virtio_user_dev *dev);
  62         int (*send_request)(struct virtio_user_dev *dev,
  63                             enum vhost_user_request req,
  64                             void *arg);
  65 };
  66
  67 extern struct virtio_user_backend_ops ops_user;
  68
  69 #endif