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 65 struct cb_id { 66 __u32 idx; 67 __u32 val; 68 }; 69 70 struct 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