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76 lines
2.5 KiB
76 lines
2.5 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) 2004-2011 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 _UAPI__DLM_DOT_H__ |
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#define _UAPI__DLM_DOT_H__ |
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/* |
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* Interface to Distributed Lock Manager (DLM) |
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* routines and structures to use DLM lockspaces |
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*/ |
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/* Lock levels and flags are here */ |
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#include <linux/dlmconstants.h> |
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#include <linux/types.h> |
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typedef void dlm_lockspace_t; |
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/* |
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* Lock status block |
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* |
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* Use this structure to specify the contents of the lock value block. For a |
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* conversion request, this structure is used to specify the lock ID of the |
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* lock. DLM writes the status of the lock request and the lock ID assigned |
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* to the request in the lock status block. |
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* |
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* sb_lkid: the returned lock ID. It is set on new (non-conversion) requests. |
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* It is available when dlm_lock returns. |
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* |
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* sb_lvbptr: saves or returns the contents of the lock's LVB according to rules |
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* shown for the DLM_LKF_VALBLK flag. |
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* |
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* sb_flags: DLM_SBF_DEMOTED is returned if in the process of promoting a lock, |
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* it was first demoted to NL to avoid conversion deadlock. |
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* DLM_SBF_VALNOTVALID is returned if the resource's LVB is marked invalid. |
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* |
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* sb_status: the returned status of the lock request set prior to AST |
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* execution. Possible return values: |
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* |
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* 0 if lock request was successful |
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* -EAGAIN if request would block and is flagged DLM_LKF_NOQUEUE |
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* -DLM_EUNLOCK if unlock request was successful |
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* -DLM_ECANCEL if a cancel completed successfully |
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* -EDEADLK if a deadlock was detected |
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* -ETIMEDOUT if the lock request was canceled due to a timeout |
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*/ |
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#define DLM_SBF_DEMOTED 0x01 |
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#define DLM_SBF_VALNOTVALID 0x02 |
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#define DLM_SBF_ALTMODE 0x04 |
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struct dlm_lksb { |
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int sb_status; |
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__u32 sb_lkid; |
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char sb_flags; |
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char * sb_lvbptr; |
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}; |
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/* dlm_new_lockspace() flags */ |
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#define DLM_LSFL_TIMEWARN 0x00000002 |
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#define DLM_LSFL_FS 0x00000004 |
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#define DLM_LSFL_NEWEXCL 0x00000008 |
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#endif /* _UAPI__DLM_DOT_H__ */
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