You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
165 lines
5.0 KiB
C
165 lines
5.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
/******************************************************************************
|
|
*******************************************************************************
|
|
**
|
|
** 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.
|
|
**
|
|
*******************************************************************************
|
|
******************************************************************************/
|
|
|
|
#ifndef __DLMCONSTANTS_DOT_H__
|
|
#define __DLMCONSTANTS_DOT_H__
|
|
|
|
/*
|
|
* Constants used by DLM interface.
|
|
*/
|
|
|
|
#define DLM_LOCKSPACE_LEN 64
|
|
#define DLM_RESNAME_MAXLEN 64
|
|
|
|
|
|
/*
|
|
* Lock Modes
|
|
*/
|
|
|
|
#define DLM_LOCK_IV (-1) /* invalid */
|
|
#define DLM_LOCK_NL 0 /* null */
|
|
#define DLM_LOCK_CR 1 /* concurrent read */
|
|
#define DLM_LOCK_CW 2 /* concurrent write */
|
|
#define DLM_LOCK_PR 3 /* protected read */
|
|
#define DLM_LOCK_PW 4 /* protected write */
|
|
#define DLM_LOCK_EX 5 /* exclusive */
|
|
|
|
|
|
/*
|
|
* Flags to dlm_lock
|
|
*
|
|
* DLM_LKF_NOQUEUE
|
|
*
|
|
* Do not queue the lock request on the wait queue if it cannot be granted
|
|
* immediately. If the lock cannot be granted because of this flag, DLM will
|
|
* either return -EAGAIN from the dlm_lock call or will return 0 from
|
|
* dlm_lock and -EAGAIN in the lock status block when the AST is executed.
|
|
*
|
|
* DLM_LKF_CANCEL
|
|
*
|
|
* Used to cancel a pending lock request or conversion. A converting lock is
|
|
* returned to its previously granted mode.
|
|
*
|
|
* DLM_LKF_CONVERT
|
|
*
|
|
* Indicates a lock conversion request. For conversions the name and namelen
|
|
* are ignored and the lock ID in the LKSB is used to identify the lock.
|
|
*
|
|
* DLM_LKF_VALBLK
|
|
*
|
|
* Requests DLM to return the current contents of the lock value block in the
|
|
* lock status block. When this flag is set in a lock conversion from PW or EX
|
|
* modes, DLM assigns the value specified in the lock status block to the lock
|
|
* value block of the lock resource. The LVB is a DLM_LVB_LEN size array
|
|
* containing application-specific information.
|
|
*
|
|
* DLM_LKF_QUECVT
|
|
*
|
|
* Force a conversion request to be queued, even if it is compatible with
|
|
* the granted modes of other locks on the same resource.
|
|
*
|
|
* DLM_LKF_IVVALBLK
|
|
*
|
|
* Invalidate the lock value block.
|
|
*
|
|
* DLM_LKF_CONVDEADLK
|
|
*
|
|
* Allows the dlm to resolve conversion deadlocks internally by demoting the
|
|
* granted mode of a converting lock to NL. The DLM_SBF_DEMOTED flag is
|
|
* returned for a conversion that's been effected by this.
|
|
*
|
|
* DLM_LKF_PERSISTENT
|
|
*
|
|
* Only relevant to locks originating in userspace. A persistent lock will not
|
|
* be removed if the process holding the lock exits.
|
|
*
|
|
* DLM_LKF_NODLCKWT
|
|
*
|
|
* Do not cancel the lock if it gets into conversion deadlock.
|
|
* Exclude this lock from being monitored due to DLM_LSFL_TIMEWARN.
|
|
*
|
|
* DLM_LKF_NODLCKBLK
|
|
*
|
|
* net yet implemented
|
|
*
|
|
* DLM_LKF_EXPEDITE
|
|
*
|
|
* Used only with new requests for NL mode locks. Tells the lock manager
|
|
* to grant the lock, ignoring other locks in convert and wait queues.
|
|
*
|
|
* DLM_LKF_NOQUEUEBAST
|
|
*
|
|
* Send blocking AST's before returning -EAGAIN to the caller. It is only
|
|
* used along with the NOQUEUE flag. Blocking AST's are not sent for failed
|
|
* NOQUEUE requests otherwise.
|
|
*
|
|
* DLM_LKF_HEADQUE
|
|
*
|
|
* Add a lock to the head of the convert or wait queue rather than the tail.
|
|
*
|
|
* DLM_LKF_NOORDER
|
|
*
|
|
* Disregard the standard grant order rules and grant a lock as soon as it
|
|
* is compatible with other granted locks.
|
|
*
|
|
* DLM_LKF_ORPHAN
|
|
*
|
|
* Acquire an orphan lock.
|
|
*
|
|
* DLM_LKF_ALTPR
|
|
*
|
|
* If the requested mode cannot be granted immediately, try to grant the lock
|
|
* in PR mode instead. If this alternate mode is granted instead of the
|
|
* requested mode, DLM_SBF_ALTMODE is returned in the lksb.
|
|
*
|
|
* DLM_LKF_ALTCW
|
|
*
|
|
* The same as ALTPR, but the alternate mode is CW.
|
|
*
|
|
* DLM_LKF_FORCEUNLOCK
|
|
*
|
|
* Unlock the lock even if it is converting or waiting or has sublocks.
|
|
* Only really for use by the userland device.c code.
|
|
*
|
|
*/
|
|
|
|
#define DLM_LKF_NOQUEUE 0x00000001
|
|
#define DLM_LKF_CANCEL 0x00000002
|
|
#define DLM_LKF_CONVERT 0x00000004
|
|
#define DLM_LKF_VALBLK 0x00000008
|
|
#define DLM_LKF_QUECVT 0x00000010
|
|
#define DLM_LKF_IVVALBLK 0x00000020
|
|
#define DLM_LKF_CONVDEADLK 0x00000040
|
|
#define DLM_LKF_PERSISTENT 0x00000080
|
|
#define DLM_LKF_NODLCKWT 0x00000100
|
|
#define DLM_LKF_NODLCKBLK 0x00000200
|
|
#define DLM_LKF_EXPEDITE 0x00000400
|
|
#define DLM_LKF_NOQUEUEBAST 0x00000800
|
|
#define DLM_LKF_HEADQUE 0x00001000
|
|
#define DLM_LKF_NOORDER 0x00002000
|
|
#define DLM_LKF_ORPHAN 0x00004000
|
|
#define DLM_LKF_ALTPR 0x00008000
|
|
#define DLM_LKF_ALTCW 0x00010000
|
|
#define DLM_LKF_FORCEUNLOCK 0x00020000
|
|
#define DLM_LKF_TIMEOUT 0x00040000
|
|
|
|
/*
|
|
* Some return codes that are not in errno.h
|
|
*/
|
|
|
|
#define DLM_ECANCEL 0x10001
|
|
#define DLM_EUNLOCK 0x10002
|
|
|
|
#endif /* __DLMCONSTANTS_DOT_H__ */
|