[linux.git] / include / linux / dlm_device.h

/******************************************************************************
*******************************************************************************
**
**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
**  Copyright (C) 2004-2005 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 5
#define DLM_DEVICE_VERSION_MINOR 1
#define DLM_DEVICE_VERSION_PATCH 0

/* struct passed to the lock write */
struct dlm_lock_params {
	__u8 mode;
	__u8 namelen;
	__u16 flags;
	__u32 lkid;
	__u32 parent;
        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 read from the "device" fd,
   consists mainly of userspace pointers for the library to use */
struct dlm_lock_result {
	__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

/* 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.
	5	** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
	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 */
22da645f	21	#define DLM_DEVICE_VERSION_MAJOR 5
72c2be77	22	#define DLM_DEVICE_VERSION_MINOR 1
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;
e7fd4179 DT	29	__u16 flags;
	30	__u32 lkid;
	31	__u32 parent;
e7fd4179 DT	32	void __user *castparam;
	33	void __user *castaddr;
	34	void __user *bastparam;
	35	void __user *bastaddr;
	36	struct dlm_lksb __user *lksb;
	37	char lvb[DLM_USER_LVB_LEN];
22da645f	38	char name[0];
e7fd4179 DT	39	};
	40
	41	struct dlm_lspace_params {
	42	__u32 flags;
	43	__u32 minor;
22da645f	44	char name[0];
e7fd4179 DT	45	};
e7fd4179 DT	46
72c2be77 DT	47	struct dlm_purge_params {
	48	__u32 nodeid;
	49	__u32 pid;
	50	};
	51
e7fd4179 DT	52	struct dlm_write_request {
	53	__u32 version[3];
	54	__u8 cmd;
22da645f PC	55	__u8 is64bit;
22da645f PC	56	__u8 unused[2];
e7fd4179 DT	57
	58	union {
	59	struct dlm_lock_params lock;
	60	struct dlm_lspace_params lspace;
72c2be77	61	struct dlm_purge_params purge;
e7fd4179 DT	62	} i;
	63	};
	64
	65	/* struct read from the "device" fd,
	66	consists mainly of userspace pointers for the library to use */
	67	struct dlm_lock_result {
	68	__u32 length;
	69	void __user * user_astaddr;
	70	void __user * user_astparam;
	71	struct dlm_lksb __user * user_lksb;
	72	struct dlm_lksb lksb;
	73	__u8 bast_mode;
22da645f	74	__u8 unused[3];
e7fd4179 DT	75	/* Offsets may be zero if no data is present */
	76	__u32 lvb_offset;
	77	};
	78
	79	/* Commands passed to the device */
	80	#define DLM_USER_LOCK 1
	81	#define DLM_USER_UNLOCK 2
	82	#define DLM_USER_QUERY 3
	83	#define DLM_USER_CREATE_LOCKSPACE 4
	84	#define DLM_USER_REMOVE_LOCKSPACE 5
72c2be77	85	#define DLM_USER_PURGE 6
e7fd4179 DT	86
	87	/* Arbitrary length restriction */
	88	#define MAX_LS_NAME_LEN 64
	89
	90	/* Lockspace flags */
	91	#define DLM_USER_LSFLG_AUTOFREE 1
	92	#define DLM_USER_LSFLG_FORCEFREE 2
	93