LXR linux/include/uapi/linux/connector.h

   1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2/*
   3 *      connector.h
   4 * 
   5 * 2004-2005 Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
   6 * All rights reserved.
   7 * 
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or
  11 * (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21 */
  22
  23#ifndef _UAPI__CONNECTOR_H
  24#define _UAPI__CONNECTOR_H
  25
  26#include <linux/types.h>
  27
  28/*
  29 * Process Events connector unique ids -- used for message routing
  30 */
  31#define CN_IDX_PROC                     0x1
  32#define CN_VAL_PROC                     0x1
  33#define CN_IDX_CIFS                     0x2
  34#define CN_VAL_CIFS                     0x1
  35#define CN_W1_IDX                       0x3     /* w1 communication */
  36#define CN_W1_VAL                       0x1
  37#define CN_IDX_V86D                     0x4
  38#define CN_VAL_V86D_UVESAFB             0x1
  39#define CN_IDX_BB                       0x5     /* BlackBoard, from the TSP GPL sampling framework */
  40#define CN_DST_IDX                      0x6
  41#define CN_DST_VAL                      0x1
  42#define CN_IDX_DM                       0x7     /* Device Mapper */
  43#define CN_VAL_DM_USERSPACE_LOG         0x1
  44#define CN_IDX_DRBD                     0x8
  45#define CN_VAL_DRBD                     0x1
  46#define CN_KVP_IDX                      0x9     /* HyperV KVP */
  47#define CN_KVP_VAL                      0x1     /* queries from the kernel */
  48#define CN_VSS_IDX                      0xA     /* HyperV VSS */
  49#define CN_VSS_VAL                      0x1     /* queries from the kernel */
  50
  51
  52#define CN_NETLINK_USERS                11      /* Highest index + 1 */
  53
  54/*
  55 * Maximum connector's message size.
  56 */
  57#define CONNECTOR_MAX_MSG_SIZE          16384
  58
  59/*
  60 * idx and val are unique identifiers which 
  61 * are used for message routing and 
  62 * must be registered in connector.h for in-kernel usage.
  63 */
  64
  65struct cb_id {
  66        __u32 idx;
  67        __u32 val;
  68};
  69
  70struct cn_msg {
  71        struct cb_id id;
  72
  73        __u32 seq;
  74        __u32 ack;
  75
  76        __u16 len;              /* Length of the following data */
  77        __u16 flags;
  78        __u8 data[0];
  79};
  80
  81#endif /* _UAPI__CONNECTOR_H */
  82