ceph/src/seastar/dpdk/drivers/net/virtio/virtio_user/vhost_kernel_tap.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 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
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  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 #include <sys/ioctl.h>
  35
  36 /* TUN ioctls */
  37 #define TUNSETIFF     _IOW('T', 202, int)
  38 #define TUNGETFEATURES _IOR('T', 207, unsigned int)
  39 #define TUNSETOFFLOAD  _IOW('T', 208, unsigned int)
  40 #define TUNGETIFF      _IOR('T', 210, unsigned int)
  41 #define TUNSETSNDBUF   _IOW('T', 212, int)
  42 #define TUNGETVNETHDRSZ _IOR('T', 215, int)
  43 #define TUNSETVNETHDRSZ _IOW('T', 216, int)
  44 #define TUNSETQUEUE  _IOW('T', 217, int)
  45 #define TUNSETVNETLE _IOW('T', 220, int)
  46 #define TUNSETVNETBE _IOW('T', 222, int)
  47
  48 /* TUNSETIFF ifr flags */
  49 #define IFF_TAP          0x0002
  50 #define IFF_NO_PI        0x1000
  51 #define IFF_ONE_QUEUE    0x2000
  52 #define IFF_VNET_HDR     0x4000
  53 #define IFF_MULTI_QUEUE  0x0100
  54 #define IFF_ATTACH_QUEUE 0x0200
  55 #define IFF_DETACH_QUEUE 0x0400
  56
  57 /* Features for GSO (TUNSETOFFLOAD). */
  58 #define TUN_F_CSUM      0x01    /* You can hand me unchecksummed packets. */
  59 #define TUN_F_TSO4      0x02    /* I can handle TSO for IPv4 packets */
  60 #define TUN_F_TSO6      0x04    /* I can handle TSO for IPv6 packets */
  61 #define TUN_F_TSO_ECN   0x08    /* I can handle TSO with ECN bits. */
  62 #define TUN_F_UFO       0x10    /* I can handle UFO packets */
  63
  64 /* Constants */
  65 #define PATH_NET_TUN    "/dev/net/tun"
  66
  67 int vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq);