1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * linux/include/linux/lockd/xdr.h
4  *
5  * XDR types for the NLM protocol
6  *
7  * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de>
8  */
9 
10 #ifndef LOCKD_XDR_H
11 #define LOCKD_XDR_H
12 
13 #include <linux/fs.h>
14 #include <linux/nfs.h>
15 #include <linux/sunrpc/xdr.h>
16 
17 #define SM_MAXSTRLEN		1024
18 #define SM_PRIV_SIZE		16
19 
20 struct nsm_private {
21 	unsigned char		data[SM_PRIV_SIZE];
22 };
23 
24 struct svc_rqst;
25 
26 #define NLM_MAXCOOKIELEN    	32
27 #define NLM_MAXSTRLEN		1024
28 
29 #define	nlm_granted		cpu_to_be32(NLM_LCK_GRANTED)
30 #define	nlm_lck_denied		cpu_to_be32(NLM_LCK_DENIED)
31 #define	nlm_lck_denied_nolocks	cpu_to_be32(NLM_LCK_DENIED_NOLOCKS)
32 #define	nlm_lck_blocked		cpu_to_be32(NLM_LCK_BLOCKED)
33 #define	nlm_lck_denied_grace_period	cpu_to_be32(NLM_LCK_DENIED_GRACE_PERIOD)
34 
35 #define nlm_drop_reply		cpu_to_be32(30000)
36 
37 /* Lock info passed via NLM */
38 struct nlm_lock {
39 	char *			caller;
40 	unsigned int		len; 	/* length of "caller" */
41 	struct nfs_fh		fh;
42 	struct xdr_netobj	oh;
43 	u32			svid;
44 	struct file_lock	fl;
45 };
46 
47 /*
48  *	NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes.
49  *	FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to
50  *	32 bytes.
51  */
52 
53 struct nlm_cookie
54 {
55 	unsigned char data[NLM_MAXCOOKIELEN];
56 	unsigned int len;
57 };
58 
59 /*
60  * Generic lockd arguments for all but sm_notify
61  */
62 struct nlm_args {
63 	struct nlm_cookie	cookie;
64 	struct nlm_lock		lock;
65 	u32			block;
66 	u32			reclaim;
67 	u32			state;
68 	u32			monitor;
69 	u32			fsm_access;
70 	u32			fsm_mode;
71 };
72 
73 typedef struct nlm_args nlm_args;
74 
75 /*
76  * Generic lockd result
77  */
78 struct nlm_res {
79 	struct nlm_cookie	cookie;
80 	__be32			status;
81 	struct nlm_lock		lock;
82 };
83 
84 /*
85  * statd callback when client has rebooted
86  */
87 struct nlm_reboot {
88 	char			*mon;
89 	unsigned int		len;
90 	u32			state;
91 	struct nsm_private	priv;
92 };
93 
94 /*
95  * Contents of statd callback when monitored host rebooted
96  */
97 #define NLMSVC_XDRSIZE		sizeof(struct nlm_args)
98 
99 int	nlmsvc_decode_testargs(struct svc_rqst *, __be32 *);
100 int	nlmsvc_encode_testres(struct svc_rqst *, __be32 *);
101 int	nlmsvc_decode_lockargs(struct svc_rqst *, __be32 *);
102 int	nlmsvc_decode_cancargs(struct svc_rqst *, __be32 *);
103 int	nlmsvc_decode_unlockargs(struct svc_rqst *, __be32 *);
104 int	nlmsvc_encode_res(struct svc_rqst *, __be32 *);
105 int	nlmsvc_decode_res(struct svc_rqst *, __be32 *);
106 int	nlmsvc_encode_void(struct svc_rqst *, __be32 *);
107 int	nlmsvc_decode_void(struct svc_rqst *, __be32 *);
108 int	nlmsvc_decode_shareargs(struct svc_rqst *, __be32 *);
109 int	nlmsvc_encode_shareres(struct svc_rqst *, __be32 *);
110 int	nlmsvc_decode_notify(struct svc_rqst *, __be32 *);
111 int	nlmsvc_decode_reboot(struct svc_rqst *, __be32 *);
112 /*
113 int	nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
114 int	nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
115 int	nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
116 int	nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
117  */
118 
119 #endif /* LOCKD_XDR_H */
120