[net-next-2.6.git] / include / linux / dlm_device.h

/******************************************************************************
*******************************************************************************
**
**  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 __user *castparam;
	void __user *castaddr;
	void __user *bastparam;
	void __user *bastaddr;
	struct dlm_lksb __user *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 * user_astaddr;
	void __user * user_astparam;
	struct dlm_lksb __user * 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
Commit	Line	Data
e7fd4179 DT	1	/******************************************************************************
	2	*******************************************************************************
	3	**
	4	** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
d7db923e	5	** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
e7fd4179 DT	6	**
	7	** This copyrighted material is made available to anyone wishing to use,
	8	** modify, copy, or redistribute it subject to the terms and conditions
	9	** of the GNU General Public License v.2.
	10	**
	11	*******************************************************************************
	12	******************************************************************************/
	13
	14	/* This is the device interface for dlm, most users will use a library
	15	* interface.
	16	*/
	17
	18	#define DLM_USER_LVB_LEN 32
	19
	20	/* Version of the device interface */
d7db923e DT	21	#define DLM_DEVICE_VERSION_MAJOR 6
d7db923e DT	22	#define DLM_DEVICE_VERSION_MINOR 0
e7fd4179 DT	23	#define DLM_DEVICE_VERSION_PATCH 0
	24
	25	/* struct passed to the lock write */
	26	struct dlm_lock_params {
	27	__u8 mode;
22da645f	28	__u8 namelen;
d7db923e DT	29	__u16 unused;
d7db923e DT	30	__u32 flags;
e7fd4179 DT	31	__u32 lkid;
e7fd4179 DT	32	__u32 parent;
d7db923e DT	33	__u64 xid;
	34	__u64 timeout;
	35	void __user *castparam;
e7fd4179 DT	36	void __user *castaddr;
e7fd4179 DT	37	void __user *bastparam;
d7db923e	38	void __user *bastaddr;
e7fd4179 DT	39	struct dlm_lksb __user *lksb;
e7fd4179 DT	40	char lvb[DLM_USER_LVB_LEN];
22da645f	41	char name[0];
e7fd4179 DT	42	};
	43
	44	struct dlm_lspace_params {
	45	__u32 flags;
	46	__u32 minor;
22da645f	47	char name[0];
e7fd4179 DT	48	};
e7fd4179 DT	49
72c2be77 DT	50	struct dlm_purge_params {
	51	__u32 nodeid;
	52	__u32 pid;
	53	};
	54
e7fd4179 DT	55	struct dlm_write_request {
	56	__u32 version[3];
	57	__u8 cmd;
22da645f PC	58	__u8 is64bit;
22da645f PC	59	__u8 unused[2];
e7fd4179 DT	60
	61	union {
	62	struct dlm_lock_params lock;
	63	struct dlm_lspace_params lspace;
72c2be77	64	struct dlm_purge_params purge;
e7fd4179 DT	65	} i;
	66	};
	67
d7db923e DT	68	struct dlm_device_version {
	69	__u32 version[3];
	70	};
	71
e7fd4179 DT	72	/* struct read from the "device" fd,
e7fd4179 DT	73	consists mainly of userspace pointers for the library to use */
d7db923e	74
e7fd4179	75	struct dlm_lock_result {
d7db923e	76	__u32 version[3];
e7fd4179 DT	77	__u32 length;
	78	void __user * user_astaddr;
	79	void __user * user_astparam;
	80	struct dlm_lksb __user * user_lksb;
	81	struct dlm_lksb lksb;
	82	__u8 bast_mode;
22da645f	83	__u8 unused[3];
e7fd4179 DT	84	/* Offsets may be zero if no data is present */
	85	__u32 lvb_offset;
	86	};
	87
	88	/* Commands passed to the device */
	89	#define DLM_USER_LOCK 1
	90	#define DLM_USER_UNLOCK 2
	91	#define DLM_USER_QUERY 3
	92	#define DLM_USER_CREATE_LOCKSPACE 4
	93	#define DLM_USER_REMOVE_LOCKSPACE 5
72c2be77	94	#define DLM_USER_PURGE 6
8b4021fa	95	#define DLM_USER_DEADLOCK 7
e7fd4179 DT	96
	97	/* Arbitrary length restriction */
	98	#define MAX_LS_NAME_LEN 64
	99
	100	/* Lockspace flags */
	101	#define DLM_USER_LSFLG_AUTOFREE 1
	102	#define DLM_USER_LSFLG_FORCEFREE 2
	103