1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * linux/include/linux/lockd/nlm.h
4  *
5  * Declarations for the Network Lock Manager protocol.
6  *
7  * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
8  */
9 
10 #ifndef LINUX_LOCKD_NLM_H
11 #define LINUX_LOCKD_NLM_H
12 
13 
14 /* Maximum file offset in file_lock.fl_end */
15 # define NLM_OFFSET_MAX		((s32) 0x7fffffff)
16 # define NLM4_OFFSET_MAX	((s64) ((~(u64)0) >> 1))
17 
18 /* Return states for NLM */
19 enum {
20 	NLM_LCK_GRANTED			= 0,
21 	NLM_LCK_DENIED			= 1,
22 	NLM_LCK_DENIED_NOLOCKS		= 2,
23 	NLM_LCK_BLOCKED			= 3,
24 	NLM_LCK_DENIED_GRACE_PERIOD	= 4,
25 #ifdef CONFIG_LOCKD_V4
26 	NLM_DEADLCK			= 5,
27 	NLM_ROFS			= 6,
28 	NLM_STALE_FH			= 7,
29 	NLM_FBIG			= 8,
30 	NLM_FAILED			= 9,
31 #endif
32 };
33 
34 #define NLM_PROGRAM		100021
35 
36 #define NLMPROC_NULL		0
37 #define NLMPROC_TEST		1
38 #define NLMPROC_LOCK		2
39 #define NLMPROC_CANCEL		3
40 #define NLMPROC_UNLOCK		4
41 #define NLMPROC_GRANTED		5
42 #define NLMPROC_TEST_MSG	6
43 #define NLMPROC_LOCK_MSG	7
44 #define NLMPROC_CANCEL_MSG	8
45 #define NLMPROC_UNLOCK_MSG	9
46 #define NLMPROC_GRANTED_MSG	10
47 #define NLMPROC_TEST_RES	11
48 #define NLMPROC_LOCK_RES	12
49 #define NLMPROC_CANCEL_RES	13
50 #define NLMPROC_UNLOCK_RES	14
51 #define NLMPROC_GRANTED_RES	15
52 #define NLMPROC_NSM_NOTIFY	16		/* statd callback */
53 #define NLMPROC_SHARE		20
54 #define NLMPROC_UNSHARE		21
55 #define NLMPROC_NM_LOCK		22
56 #define NLMPROC_FREE_ALL	23
57 
58 #endif /* LINUX_LOCKD_NLM_H */
59