/*****************************************************************************************************************************************************************  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.**  Copyright (C) 2004-2011 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 _UAPI__DLM_DOT_H__#define _UAPI__DLM_DOT_H__ /* * Interface to Distributed Lock Manager (DLM) * routines and structures to use DLM lockspaces */ /* Lock levels and flags are here */#include <linux/dlmconstants.h>#include <linux/types.h> typedef void dlm_lockspace_t; /* * Lock status block * * Use this structure to specify the contents of the lock value block.  For a * conversion request, this structure is used to specify the lock ID of the * lock.  DLM writes the status of the lock request and the lock ID assigned * to the request in the lock status block. * * sb_lkid: the returned lock ID.  It is set on new (non-conversion) requests. * It is available when dlm_lock returns. * * sb_lvbptr: saves or returns the contents of the lock's LVB according to rules * shown for the DLM_LKF_VALBLK flag. * * sb_flags: DLM_SBF_DEMOTED is returned if in the process of promoting a lock, * it was first demoted to NL to avoid conversion deadlock. * DLM_SBF_VALNOTVALID is returned if the resource's LVB is marked invalid. * * sb_status: the returned status of the lock request set prior to AST * execution.  Possible return values: * * 0 if lock request was successful * -EAGAIN if request would block and is flagged DLM_LKF_NOQUEUE * -DLM_EUNLOCK if unlock request was successful * -DLM_ECANCEL if a cancel completed successfully * -EDEADLK if a deadlock was detected * -ETIMEDOUT if the lock request was canceled due to a timeout */ #define DLM_SBF_DEMOTED		0x01#define DLM_SBF_VALNOTVALID	0x02#define DLM_SBF_ALTMODE		0x04 struct dlm_lksb {	int 	 sb_status;	__u32	 sb_lkid;	char 	 sb_flags;	char *	 sb_lvbptr;}; /* dlm_new_lockspace() flags */ #define DLM_LSFL_TIMEWARN	0x00000002#define DLM_LSFL_FS     	0x00000004#define DLM_LSFL_NEWEXCL     	0x00000008  #endif /* _UAPI__DLM_DOT_H__ */