ceph/src/seastar/dpdk/drivers/net/tap/tap_netlink.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright 2017 6WIND S.A.
   5  *   Copyright 2017 Mellanox.
   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 6WIND S.A. 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 #ifndef _TAP_NETLINK_H_
  35 #define _TAP_NETLINK_H_
  36
  37 #include <ctype.h>
  38 #include <inttypes.h>
  39 #include <linux/rtnetlink.h>
  40 #include <linux/netlink.h>
  41 #include <stdio.h>
  42
  43 #include <rte_log.h>
  44
  45 #define NLMSG_BUF 512
  46
  47 struct nlmsg {
  48         struct nlmsghdr nh;
  49         struct tcmsg t;
  50         char buf[NLMSG_BUF];
  51         struct nested_tail *nested_tails;
  52 };
  53
  54 #define NLMSG_TAIL(nlh) (void *)((char *)(nlh) + NLMSG_ALIGN((nlh)->nlmsg_len))
  55
  56 int nl_init(uint32_t nl_groups);
  57 int nl_final(int nlsk_fd);
  58 int nl_send(int nlsk_fd, struct nlmsghdr *nh);
  59 int nl_recv(int nlsk_fd, int (*callback)(struct nlmsghdr *, void *), void *arg);
  60 int nl_recv_ack(int nlsk_fd);
  61 void nlattr_add(struct nlmsghdr *nh, unsigned short type,
  62                 unsigned int data_len, const void *data);
  63 void nlattr_add8(struct nlmsghdr *nh, unsigned short type, uint8_t data);
  64 void nlattr_add16(struct nlmsghdr *nh, unsigned short type, uint16_t data);
  65 void nlattr_add32(struct nlmsghdr *nh, unsigned short type, uint32_t data);
  66 int nlattr_nested_start(struct nlmsg *msg, uint16_t type);
  67 void nlattr_nested_finish(struct nlmsg *msg);
  68
  69 #endif /* _TAP_NETLINK_H_ */