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164 lines
5.0 KiB
164 lines
5.0 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/****************************************************************************** |
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******************************************************************************* |
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** |
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
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** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
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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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******************************************************************************/ |
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#ifndef __DLMCONSTANTS_DOT_H__ |
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#define __DLMCONSTANTS_DOT_H__ |
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/* |
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* Constants used by DLM interface. |
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*/ |
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#define DLM_LOCKSPACE_LEN 64 |
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#define DLM_RESNAME_MAXLEN 64 |
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/* |
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* Lock Modes |
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*/ |
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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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/* |
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* Flags to dlm_lock |
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* |
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* DLM_LKF_NOQUEUE |
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* |
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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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* |
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* DLM_LKF_CANCEL |
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* |
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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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* |
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* DLM_LKF_CONVERT |
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* |
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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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* |
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* DLM_LKF_VALBLK |
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* |
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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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* |
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* DLM_LKF_QUECVT |
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* |
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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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* |
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* DLM_LKF_IVVALBLK |
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* |
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* Invalidate the lock value block. |
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* |
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* DLM_LKF_CONVDEADLK |
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* |
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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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* |
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* DLM_LKF_PERSISTENT |
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* |
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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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* |
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* DLM_LKF_NODLCKWT |
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* |
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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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* |
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* DLM_LKF_NODLCKBLK |
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* |
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* net yet implemented |
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* |
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* DLM_LKF_EXPEDITE |
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* |
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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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* |
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* DLM_LKF_NOQUEUEBAST |
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* |
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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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* |
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* DLM_LKF_HEADQUE |
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* |
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* Add a lock to the head of the convert or wait queue rather than the tail. |
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* |
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* DLM_LKF_NOORDER |
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* |
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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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* |
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* DLM_LKF_ORPHAN |
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* |
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* Acquire an orphan lock. |
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* |
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* DLM_LKF_ALTPR |
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* |
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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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* |
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* DLM_LKF_ALTCW |
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* |
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* The same as ALTPR, but the alternate mode is CW. |
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* |
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* DLM_LKF_FORCEUNLOCK |
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* |
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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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* |
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*/ |
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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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/* |
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* Some return codes that are not in errno.h |
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*/ |
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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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