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