include/linux/dlm_device.h

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