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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2/******************************************************************************3*******************************************************************************4**5** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.6** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.7**8** This copyrighted material is made available to anyone wishing to use,9** modify, copy, or redistribute it subject to the terms and conditions10** of the GNU General Public License v.2.11**12*******************************************************************************13******************************************************************************/14 15#ifndef _UAPI__DLM_DOT_H__16#define _UAPI__DLM_DOT_H__17 18/*19 * Interface to Distributed Lock Manager (DLM)20 * routines and structures to use DLM lockspaces21 */22 23/* Lock levels and flags are here */24#include <linux/dlmconstants.h>25#include <linux/types.h>26 27typedef void dlm_lockspace_t;28 29/*30 * Lock status block31 *32 * Use this structure to specify the contents of the lock value block. For a33 * conversion request, this structure is used to specify the lock ID of the34 * lock. DLM writes the status of the lock request and the lock ID assigned35 * to the request in the lock status block.36 *37 * sb_lkid: the returned lock ID. It is set on new (non-conversion) requests.38 * It is available when dlm_lock returns.39 *40 * sb_lvbptr: saves or returns the contents of the lock's LVB according to rules41 * shown for the DLM_LKF_VALBLK flag.42 *43 * sb_flags: DLM_SBF_DEMOTED is returned if in the process of promoting a lock,44 * it was first demoted to NL to avoid conversion deadlock.45 * DLM_SBF_VALNOTVALID is returned if the resource's LVB is marked invalid.46 *47 * sb_status: the returned status of the lock request set prior to AST48 * execution. Possible return values:49 *50 * 0 if lock request was successful51 * -EAGAIN if request would block and is flagged DLM_LKF_NOQUEUE52 * -DLM_EUNLOCK if unlock request was successful53 * -DLM_ECANCEL if a cancel completed successfully54 * -EDEADLK if a deadlock was detected55 * -ETIMEDOUT if the lock request was canceled due to a timeout56 */57 58#define DLM_SBF_DEMOTED 0x0159#define DLM_SBF_VALNOTVALID 0x0260#define DLM_SBF_ALTMODE 0x0461 62struct dlm_lksb {63 int sb_status;64 __u32 sb_lkid;65 char sb_flags;66 char * sb_lvbptr;67};68 69/* dlm_new_lockspace() flags */70 71/* DLM_LSFL_TIMEWARN is deprecated and reserved. DO NOT USE! */72#define DLM_LSFL_TIMEWARN 0x0000000273#define DLM_LSFL_NEWEXCL 0x0000000874/* currently reserved due in-kernel use */75#define __DLM_LSFL_RESERVED0 0x0000001076 77 78#endif /* _UAPI__DLM_DOT_H__ */79