The C and C++ Include Header Files

/usr/include/linux/dlm_device.h


$ cat -n /usr/include/linux/dlm_device.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	/******************************************************************************
     3	*******************************************************************************
     4	**
     5	**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
     6	**  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
     7	**
     8	**  This copyrighted material is made available to anyone wishing to use,
     9	**  modify, copy, or redistribute it subject to the terms and conditions
    10	**  of the GNU General Public License v.2.
    11	**
    12	*******************************************************************************
    13	******************************************************************************/
    14	
    15	#ifndef _LINUX_DLM_DEVICE_H
    16	#define _LINUX_DLM_DEVICE_H
    17	
    18	/* This is the device interface for dlm, most users will use a library
    19	 * interface.
    20	 */
    21	
    22	#include <linux/dlm.h>
    23	#include <linux/types.h>
    24	
    25	#define DLM_USER_LVB_LEN	32
    26	
    27	/* Version of the device interface */
    28	#define DLM_DEVICE_VERSION_MAJOR 6
    29	#define DLM_DEVICE_VERSION_MINOR 0
    30	#define DLM_DEVICE_VERSION_PATCH 2
    31	
    32	/* struct passed to the lock write */
    33	struct dlm_lock_params {
    34		__u8 mode;
    35		__u8 namelen;
    36		__u16 unused;
    37		__u32 flags;
    38		__u32 lkid;
    39		__u32 parent;
    40		__u64 xid;
    41		__u64 timeout;
    42		void *castparam;
    43		void *castaddr;
    44		void *bastparam;
    45		void *bastaddr;
    46		struct dlm_lksb *lksb;
    47		char lvb[DLM_USER_LVB_LEN];
    48		char name[];
    49	};
    50	
    51	struct dlm_lspace_params {
    52		__u32 flags;
    53		__u32 minor;
    54		char name[];
    55	};
    56	
    57	struct dlm_purge_params {
    58		__u32 nodeid;
    59		__u32 pid;
    60	};
    61	
    62	struct dlm_write_request {
    63		__u32 version[3];
    64		__u8 cmd;
    65		__u8 is64bit;
    66		__u8 unused[2];
    67	
    68		union  {
    69			struct dlm_lock_params   lock;
    70			struct dlm_lspace_params lspace;
    71			struct dlm_purge_params  purge;
    72		} i;
    73	};
    74	
    75	struct dlm_device_version {
    76		__u32 version[3];
    77	};
    78	
    79	/* struct read from the "device" fd,
    80	   consists mainly of userspace pointers for the library to use */
    81	
    82	struct dlm_lock_result {
    83		__u32 version[3];
    84		__u32 length;
    85		void * user_astaddr;
    86		void * user_astparam;
    87		struct dlm_lksb * user_lksb;
    88		struct dlm_lksb lksb;
    89		__u8 bast_mode;
    90		__u8 unused[3];
    91		/* Offsets may be zero if no data is present */
    92		__u32 lvb_offset;
    93	};
    94	
    95	/* Commands passed to the device */
    96	#define DLM_USER_LOCK         1
    97	#define DLM_USER_UNLOCK       2
    98	#define DLM_USER_QUERY        3
    99	#define DLM_USER_CREATE_LOCKSPACE  4
   100	#define DLM_USER_REMOVE_LOCKSPACE  5
   101	#define DLM_USER_PURGE        6
   102	#define DLM_USER_DEADLOCK     7
   103	
   104	/* Lockspace flags */
   105	#define DLM_USER_LSFLG_AUTOFREE   1
   106	#define DLM_USER_LSFLG_FORCEFREE  2
   107	
   108	#endif
   109