1e2be04c7SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2607ca46eSDavid Howells /****************************************************************************** 3607ca46eSDavid Howells ******************************************************************************* 4607ca46eSDavid Howells ** 5607ca46eSDavid Howells ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 6607ca46eSDavid Howells ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 7607ca46eSDavid Howells ** 8607ca46eSDavid Howells ** This copyrighted material is made available to anyone wishing to use, 9607ca46eSDavid Howells ** modify, copy, or redistribute it subject to the terms and conditions 10607ca46eSDavid Howells ** of the GNU General Public License v.2. 11607ca46eSDavid Howells ** 12607ca46eSDavid Howells ******************************************************************************* 13607ca46eSDavid Howells ******************************************************************************/ 14607ca46eSDavid Howells 15607ca46eSDavid Howells #ifndef _UAPI__DLM_DOT_H__ 16607ca46eSDavid Howells #define _UAPI__DLM_DOT_H__ 17607ca46eSDavid Howells 18607ca46eSDavid Howells /* 19607ca46eSDavid Howells * Interface to Distributed Lock Manager (DLM) 20607ca46eSDavid Howells * routines and structures to use DLM lockspaces 21607ca46eSDavid Howells */ 22607ca46eSDavid Howells 23607ca46eSDavid Howells /* Lock levels and flags are here */ 24607ca46eSDavid Howells #include <linux/dlmconstants.h> 25607ca46eSDavid Howells #include <linux/types.h> 26607ca46eSDavid Howells 27607ca46eSDavid Howells typedef void dlm_lockspace_t; 28607ca46eSDavid Howells 29607ca46eSDavid Howells /* 30607ca46eSDavid Howells * Lock status block 31607ca46eSDavid Howells * 32607ca46eSDavid Howells * Use this structure to specify the contents of the lock value block. For a 33607ca46eSDavid Howells * conversion request, this structure is used to specify the lock ID of the 34607ca46eSDavid Howells * lock. DLM writes the status of the lock request and the lock ID assigned 35607ca46eSDavid Howells * to the request in the lock status block. 36607ca46eSDavid Howells * 37607ca46eSDavid Howells * sb_lkid: the returned lock ID. It is set on new (non-conversion) requests. 38607ca46eSDavid Howells * It is available when dlm_lock returns. 39607ca46eSDavid Howells * 40607ca46eSDavid Howells * sb_lvbptr: saves or returns the contents of the lock's LVB according to rules 41607ca46eSDavid Howells * shown for the DLM_LKF_VALBLK flag. 42607ca46eSDavid Howells * 43607ca46eSDavid Howells * sb_flags: DLM_SBF_DEMOTED is returned if in the process of promoting a lock, 44607ca46eSDavid Howells * it was first demoted to NL to avoid conversion deadlock. 45607ca46eSDavid Howells * DLM_SBF_VALNOTVALID is returned if the resource's LVB is marked invalid. 46607ca46eSDavid Howells * 47607ca46eSDavid Howells * sb_status: the returned status of the lock request set prior to AST 48607ca46eSDavid Howells * execution. Possible return values: 49607ca46eSDavid Howells * 50607ca46eSDavid Howells * 0 if lock request was successful 51607ca46eSDavid Howells * -EAGAIN if request would block and is flagged DLM_LKF_NOQUEUE 52607ca46eSDavid Howells * -DLM_EUNLOCK if unlock request was successful 53607ca46eSDavid Howells * -DLM_ECANCEL if a cancel completed successfully 54607ca46eSDavid Howells * -EDEADLK if a deadlock was detected 55607ca46eSDavid Howells * -ETIMEDOUT if the lock request was canceled due to a timeout 56607ca46eSDavid Howells */ 57607ca46eSDavid Howells 58607ca46eSDavid Howells #define DLM_SBF_DEMOTED 0x01 59607ca46eSDavid Howells #define DLM_SBF_VALNOTVALID 0x02 60607ca46eSDavid Howells #define DLM_SBF_ALTMODE 0x04 61607ca46eSDavid Howells 62607ca46eSDavid Howells struct dlm_lksb { 63607ca46eSDavid Howells int sb_status; 64607ca46eSDavid Howells __u32 sb_lkid; 65607ca46eSDavid Howells char sb_flags; 66607ca46eSDavid Howells char * sb_lvbptr; 67607ca46eSDavid Howells }; 68607ca46eSDavid Howells 69607ca46eSDavid Howells /* dlm_new_lockspace() flags */ 70607ca46eSDavid Howells 71*01c7a597SAlexander Aring /* DLM_LSFL_TIMEWARN is deprecated and reserved. DO NOT USE! */ 72607ca46eSDavid Howells #define DLM_LSFL_TIMEWARN 0x00000002 73607ca46eSDavid Howells #define DLM_LSFL_NEWEXCL 0x00000008 74607ca46eSDavid Howells 75607ca46eSDavid Howells 76607ca46eSDavid Howells #endif /* _UAPI__DLM_DOT_H__ */ 77