connector.h

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/*
 *  connector.h
 * 
 * 2004-2005 Copyright (c) Evgeniy Polyakov <[email protected]>
 * 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_NETLINK_USERS        10  /* 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 */