1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux <<
2 /********************************************* 1 /******************************************************************************
3 ********************************************** 2 *******************************************************************************
4 ** 3 **
5 ** Copyright (C) Sistina Software, Inc. 1997 4 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
6 ** Copyright (C) 2004-2011 Red Hat, Inc. All 5 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
7 ** 6 **
8 ** This copyrighted material is made availabl 7 ** This copyrighted material is made available to anyone wishing to use,
9 ** modify, copy, or redistribute it subject t 8 ** modify, copy, or redistribute it subject to the terms and conditions
10 ** of the GNU General Public License v.2. 9 ** of the GNU General Public License v.2.
11 ** 10 **
12 ********************************************** 11 *******************************************************************************
13 ********************************************** 12 ******************************************************************************/
14 13
15 #ifndef _UAPI__DLM_DOT_H__ 14 #ifndef _UAPI__DLM_DOT_H__
16 #define _UAPI__DLM_DOT_H__ 15 #define _UAPI__DLM_DOT_H__
17 16
18 /* 17 /*
19 * Interface to Distributed Lock Manager (DLM) 18 * Interface to Distributed Lock Manager (DLM)
20 * routines and structures to use DLM lockspac 19 * routines and structures to use DLM lockspaces
21 */ 20 */
22 21
23 /* Lock levels and flags are here */ 22 /* Lock levels and flags are here */
24 #include <linux/dlmconstants.h> 23 #include <linux/dlmconstants.h>
25 #include <linux/types.h> 24 #include <linux/types.h>
26 25
27 typedef void dlm_lockspace_t; 26 typedef void dlm_lockspace_t;
28 27
29 /* 28 /*
30 * Lock status block 29 * Lock status block
31 * 30 *
32 * Use this structure to specify the contents 31 * Use this structure to specify the contents of the lock value block. For a
33 * conversion request, this structure is used 32 * conversion request, this structure is used to specify the lock ID of the
34 * lock. DLM writes the status of the lock re 33 * lock. DLM writes the status of the lock request and the lock ID assigned
35 * to the request in the lock status block. 34 * to the request in the lock status block.
36 * 35 *
37 * sb_lkid: the returned lock ID. It is set o 36 * sb_lkid: the returned lock ID. It is set on new (non-conversion) requests.
38 * It is available when dlm_lock returns. 37 * It is available when dlm_lock returns.
39 * 38 *
40 * sb_lvbptr: saves or returns the contents of 39 * sb_lvbptr: saves or returns the contents of the lock's LVB according to rules
41 * shown for the DLM_LKF_VALBLK flag. 40 * shown for the DLM_LKF_VALBLK flag.
42 * 41 *
43 * sb_flags: DLM_SBF_DEMOTED is returned if in 42 * sb_flags: DLM_SBF_DEMOTED is returned if in the process of promoting a lock,
44 * it was first demoted to NL to avoid convers 43 * it was first demoted to NL to avoid conversion deadlock.
45 * DLM_SBF_VALNOTVALID is returned if the reso 44 * DLM_SBF_VALNOTVALID is returned if the resource's LVB is marked invalid.
46 * 45 *
47 * sb_status: the returned status of the lock 46 * sb_status: the returned status of the lock request set prior to AST
48 * execution. Possible return values: 47 * execution. Possible return values:
49 * 48 *
50 * 0 if lock request was successful 49 * 0 if lock request was successful
51 * -EAGAIN if request would block and is flagg 50 * -EAGAIN if request would block and is flagged DLM_LKF_NOQUEUE
52 * -DLM_EUNLOCK if unlock request was successf 51 * -DLM_EUNLOCK if unlock request was successful
53 * -DLM_ECANCEL if a cancel completed successf 52 * -DLM_ECANCEL if a cancel completed successfully
54 * -EDEADLK if a deadlock was detected 53 * -EDEADLK if a deadlock was detected
55 * -ETIMEDOUT if the lock request was canceled 54 * -ETIMEDOUT if the lock request was canceled due to a timeout
56 */ 55 */
57 56
58 #define DLM_SBF_DEMOTED 0x01 57 #define DLM_SBF_DEMOTED 0x01
59 #define DLM_SBF_VALNOTVALID 0x02 58 #define DLM_SBF_VALNOTVALID 0x02
60 #define DLM_SBF_ALTMODE 0x04 59 #define DLM_SBF_ALTMODE 0x04
61 60
62 struct dlm_lksb { 61 struct dlm_lksb {
63 int sb_status; 62 int sb_status;
64 __u32 sb_lkid; 63 __u32 sb_lkid;
65 char sb_flags; 64 char sb_flags;
66 char * sb_lvbptr; 65 char * sb_lvbptr;
67 }; 66 };
68 67
69 /* dlm_new_lockspace() flags */ 68 /* dlm_new_lockspace() flags */
70 69
71 /* DLM_LSFL_TIMEWARN is deprecated and reserve <<
72 #define DLM_LSFL_TIMEWARN 0x00000002 70 #define DLM_LSFL_TIMEWARN 0x00000002
>> 71 #define DLM_LSFL_FS 0x00000004
73 #define DLM_LSFL_NEWEXCL 0x00000008 72 #define DLM_LSFL_NEWEXCL 0x00000008
74 /* currently reserved due in-kernel use */ <<
75 #define __DLM_LSFL_RESERVED0 0x00000010 <<
76 73
77 74
78 #endif /* _UAPI__DLM_DOT_H__ */ 75 #endif /* _UAPI__DLM_DOT_H__ */
79 76
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