linux-stable/include/linux/dlm_device.h
Patrick Caulfield 22da645fd6 [DLM] compat patch
Here's a patch which add 32/64 bit compat to the DLM IOs and tidies the
structures for alignment.

As it causes an ABI change I had few qualms about adding the extra flag for
"is64bit" as it simply uses a byte that would have been padding.

Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-06-09 16:14:20 -04:00

86 lines
2.2 KiB
C

/******************************************************************************
*******************************************************************************
**
** 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 0
#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_write_request {
__u32 version[3];
__u8 cmd;
__u8 is64bit;
__u8 unused[2];
union {
struct dlm_lock_params lock;
struct dlm_lspace_params lspace;
} 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
/* Arbitrary length restriction */
#define MAX_LS_NAME_LEN 64
/* Lockspace flags */
#define DLM_USER_LSFLG_AUTOFREE 1
#define DLM_USER_LSFLG_FORCEFREE 2