/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /****************************************************************************** ******************************************************************************* ** ** 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> 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 … #define DLM_SBF_VALNOTVALID … #define DLM_SBF_ALTMODE … struct dlm_lksb { … }; /* dlm_new_lockspace() flags */ /* DLM_LSFL_TIMEWARN is deprecated and reserved. DO NOT USE! */ #define DLM_LSFL_TIMEWARN … #define DLM_LSFL_NEWEXCL … /* currently reserved due in-kernel use */ #define __DLM_LSFL_RESERVED0 … #endif /* _UAPI__DLM_DOT_H__ */
Codebase Browser
linux