/*
   * 	connector.h
   * 
   * 2004-2005 Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
   * All rights reserved.
   * 
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  #ifndef _UAPI__CONNECTOR_H
  #define _UAPI__CONNECTOR_H
  
  #include <linux/types.h>
  
  /*
   * Process Events connector unique ids -- used for message routing
   */
  #define CN_IDX_PROC			0x1
  #define CN_VAL_PROC			0x1
  #define CN_IDX_CIFS			0x2
  #define CN_VAL_CIFS                     0x1
  #define CN_W1_IDX			0x3	/* w1 communication */
  #define CN_W1_VAL			0x1
  #define CN_IDX_V86D			0x4
  #define CN_VAL_V86D_UVESAFB		0x1
  #define CN_IDX_BB			0x5	/* BlackBoard, from the TSP GPL sampling framework */
  #define CN_DST_IDX			0x6
  #define CN_DST_VAL			0x1
  #define CN_IDX_DM			0x7	/* Device Mapper */
  #define CN_VAL_DM_USERSPACE_LOG		0x1
  #define CN_IDX_DRBD			0x8
  #define CN_VAL_DRBD			0x1
  #define CN_KVP_IDX			0x9	/* HyperV KVP */
  #define CN_KVP_VAL			0x1	/* queries from the kernel */

  #define CN_VSS_IDX			0xA     /* HyperV VSS */
  #define CN_VSS_VAL			0x1     /* queries from the kernel */

  
  #define CN_NETLINK_USERS		11	/* Highest index + 1 */

  
  /*
   * Maximum connector's message size.
   */
  #define CONNECTOR_MAX_MSG_SIZE		16384
  
  /*
   * idx and val are unique identifiers which 
   * are used for message routing and 
   * must be registered in connector.h for in-kernel usage.
   */
  
  struct cb_id {
  	__u32 idx;
  	__u32 val;
  };
  
  struct cn_msg {
  	struct cb_id id;
  
  	__u32 seq;
  	__u32 ack;
  
  	__u16 len;		/* Length of the following data */
  	__u16 flags;
  	__u8 data[0];
  };
  
  #endif /* _UAPI__CONNECTOR_H */