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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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/******************************************************************************

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*******************************************************************************

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** This copyrighted material is made available to anyone wishing to use,

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** modify, copy, or redistribute it subject to the terms and conditions

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** of the GNU General Public License v.2.

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*******************************************************************************

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******************************************************************************/

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#ifndef __DLMCONSTANTS_DOT_H__

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#define __DLMCONSTANTS_DOT_H__

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* Constants used by DLM interface.

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#define DLM_LOCKSPACE_LEN 64

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#define DLM_RESNAME_MAXLEN 64

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* Lock Modes

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#define DLM_LOCK_IV (-1) /* invalid */

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#define DLM_LOCK_NL 0 /* null */

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#define DLM_LOCK_CR 1 /* concurrent read */

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#define DLM_LOCK_CW 2 /* concurrent write */

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#define DLM_LOCK_PR 3 /* protected read */

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#define DLM_LOCK_PW 4 /* protected write */

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#define DLM_LOCK_EX 5 /* exclusive */

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* Flags to dlm_lock

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* DLM_LKF_NOQUEUE

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* Do not queue the lock request on the wait queue if it cannot be granted

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* immediately. If the lock cannot be granted because of this flag, DLM will

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* either return -EAGAIN from the dlm_lock call or will return 0 from

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* dlm_lock and -EAGAIN in the lock status block when the AST is executed.

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* DLM_LKF_CANCEL

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* Used to cancel a pending lock request or conversion. A converting lock is

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* returned to its previously granted mode.

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* DLM_LKF_CONVERT

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* Indicates a lock conversion request. For conversions the name and namelen

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* are ignored and the lock ID in the LKSB is used to identify the lock.

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* DLM_LKF_VALBLK

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* Requests DLM to return the current contents of the lock value block in the

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* lock status block. When this flag is set in a lock conversion from PW or EX

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* modes, DLM assigns the value specified in the lock status block to the lock

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* value block of the lock resource. The LVB is a DLM_LVB_LEN size array

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* containing application-specific information.

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* DLM_LKF_QUECVT

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* Force a conversion request to be queued, even if it is compatible with

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* the granted modes of other locks on the same resource.

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* DLM_LKF_IVVALBLK

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* Invalidate the lock value block.

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* DLM_LKF_CONVDEADLK

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* Allows the dlm to resolve conversion deadlocks internally by demoting the

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* granted mode of a converting lock to NL. The DLM_SBF_DEMOTED flag is

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* returned for a conversion that's been effected by this.

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* DLM_LKF_PERSISTENT

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* Only relevant to locks originating in userspace. A persistent lock will not

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* be removed if the process holding the lock exits.

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* DLM_LKF_NODLCKWT

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* Do not cancel the lock if it gets into conversion deadlock.

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* Exclude this lock from being monitored due to DLM_LSFL_TIMEWARN.

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* DLM_LKF_NODLCKBLK

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* net yet implemented

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* DLM_LKF_EXPEDITE

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* Used only with new requests for NL mode locks. Tells the lock manager

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* to grant the lock, ignoring other locks in convert and wait queues.

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* DLM_LKF_NOQUEUEBAST

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* Send blocking AST's before returning -EAGAIN to the caller. It is only

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* used along with the NOQUEUE flag. Blocking AST's are not sent for failed

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* NOQUEUE requests otherwise.

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* DLM_LKF_HEADQUE

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* Add a lock to the head of the convert or wait queue rather than the tail.

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* DLM_LKF_NOORDER

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* Disregard the standard grant order rules and grant a lock as soon as it

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* is compatible with other granted locks.

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* DLM_LKF_ORPHAN

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* Acquire an orphan lock.

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* DLM_LKF_ALTPR

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* If the requested mode cannot be granted immediately, try to grant the lock

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* in PR mode instead. If this alternate mode is granted instead of the

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* requested mode, DLM_SBF_ALTMODE is returned in the lksb.

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* DLM_LKF_ALTCW

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* The same as ALTPR, but the alternate mode is CW.

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* DLM_LKF_FORCEUNLOCK

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* Unlock the lock even if it is converting or waiting or has sublocks.

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* Only really for use by the userland device.c code.

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#define DLM_LKF_NOQUEUE 0x00000001

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#define DLM_LKF_CANCEL 0x00000002

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#define DLM_LKF_CONVERT 0x00000004

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#define DLM_LKF_VALBLK 0x00000008

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#define DLM_LKF_QUECVT 0x00000010

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#define DLM_LKF_IVVALBLK 0x00000020

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#define DLM_LKF_CONVDEADLK 0x00000040

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#define DLM_LKF_PERSISTENT 0x00000080

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#define DLM_LKF_NODLCKWT 0x00000100

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#define DLM_LKF_NODLCKBLK 0x00000200

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#define DLM_LKF_EXPEDITE 0x00000400

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#define DLM_LKF_NOQUEUEBAST 0x00000800

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#define DLM_LKF_HEADQUE 0x00001000

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#define DLM_LKF_NOORDER 0x00002000

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#define DLM_LKF_ORPHAN 0x00004000

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#define DLM_LKF_ALTPR 0x00008000

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#define DLM_LKF_ALTCW 0x00010000

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#define DLM_LKF_FORCEUNLOCK 0x00020000

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#define DLM_LKF_TIMEOUT 0x00040000

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* Some return codes that are not in errno.h

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#define DLM_ECANCEL 0x10001

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#define DLM_EUNLOCK 0x10002

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#endif /* __DLMCONSTANTS_DOT_H__ */

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