Viewing file:  dlm_device.h (2.37 KB) -rw-r--r--
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/******************************************************************************
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
** of the GNU General Public License v.2.
**
*******************************************************************************
******************************************************************************/
/* This is the device interface for dlm, most users will use a library
* interface.
*/
#define DLM_USER_LVB_LEN 32
/* Version of the device interface */
#define DLM_DEVICE_VERSION_MAJOR 6
#define DLM_DEVICE_VERSION_MINOR 0
#define DLM_DEVICE_VERSION_PATCH 0
/* struct passed to the lock write */
struct dlm_lock_params {
__u8 mode;
__u8 namelen;
__u16 unused;
__u32 flags;
__u32 lkid;
__u32 parent;
__u64 xid;
__u64 timeout;
void *castparam;
void *castaddr;
void *bastparam;
void *bastaddr;
struct dlm_lksb *lksb;
char lvb[DLM_USER_LVB_LEN];
char name[0];
};
struct dlm_lspace_params {
__u32 flags;
__u32 minor;
char name[0];
};
struct dlm_purge_params {
__u32 nodeid;
__u32 pid;
};
struct dlm_write_request {
__u32 version[3];
__u8 cmd;
__u8 is64bit;
__u8 unused[2];
union {
struct dlm_lock_params lock;
struct dlm_lspace_params lspace;
struct dlm_purge_params purge;
} i;
};
struct dlm_device_version {
__u32 version[3];
};
/* struct read from the "device" fd,
consists mainly of userspace pointers for the library to use */
struct dlm_lock_result {
__u32 version[3];
__u32 length;
void * user_astaddr;
void * user_astparam;
struct dlm_lksb * user_lksb;
struct dlm_lksb lksb;
__u8 bast_mode;
__u8 unused[3];
/* Offsets may be zero if no data is present */
__u32 lvb_offset;
};
/* Commands passed to the device */
#define DLM_USER_LOCK 1
#define DLM_USER_UNLOCK 2
#define DLM_USER_QUERY 3
#define DLM_USER_CREATE_LOCKSPACE 4
#define DLM_USER_REMOVE_LOCKSPACE 5
#define DLM_USER_PURGE 6
#define DLM_USER_DEADLOCK 7
/* Arbitrary length restriction */
#define MAX_LS_NAME_LEN 64
/* Lockspace flags */
#define DLM_USER_LSFLG_AUTOFREE 1
#define DLM_USER_LSFLG_FORCEFREE 2
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