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/filelock.h>
15#include <linux/nfs.h>
16#include <linux/sunrpc/xdr.h>
17
18#define SM_MAXSTRLEN		1024
19#define SM_PRIV_SIZE		16
20
21struct nsm_private {
22	unsigned char		data[SM_PRIV_SIZE];
23};
24
25struct svc_rqst;
26
27#define NLM_MAXCOOKIELEN    	32
28#define NLM_MAXSTRLEN		1024
29
30#define	nlm_granted		cpu_to_be32(NLM_LCK_GRANTED)
31#define	nlm_lck_denied		cpu_to_be32(NLM_LCK_DENIED)
32#define	nlm_lck_denied_nolocks	cpu_to_be32(NLM_LCK_DENIED_NOLOCKS)
33#define	nlm_lck_blocked		cpu_to_be32(NLM_LCK_BLOCKED)
34#define	nlm_lck_denied_grace_period	cpu_to_be32(NLM_LCK_DENIED_GRACE_PERIOD)
35
36#define nlm_drop_reply		cpu_to_be32(30000)
37
38/* Lock info passed via NLM */
39struct nlm_lock {
40	char *			caller;
41	unsigned int		len; 	/* length of "caller" */
42	struct nfs_fh		fh;
43	struct xdr_netobj	oh;
44	u32			svid;
45	u64			lock_start;
46	u64			lock_len;
47	struct file_lock	fl;
48};
49
50/*
51 *	NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes.
52 *	FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to
53 *	32 bytes.
54 */
55
56struct nlm_cookie
57{
58	unsigned char data[NLM_MAXCOOKIELEN];
59	unsigned int len;
60};
61
62/*
63 * Generic lockd arguments for all but sm_notify
64 */
65struct nlm_args {
66	struct nlm_cookie	cookie;
67	struct nlm_lock		lock;
68	u32			block;
69	u32			reclaim;
70	u32			state;
71	u32			monitor;
72	u32			fsm_access;
73	u32			fsm_mode;
74};
75
76typedef struct nlm_args nlm_args;
77
78/*
79 * Generic lockd result
80 */
81struct nlm_res {
82	struct nlm_cookie	cookie;
83	__be32			status;
84	struct nlm_lock		lock;
85};
86
87/*
88 * statd callback when client has rebooted
89 */
90struct nlm_reboot {
91	char			*mon;
92	unsigned int		len;
93	u32			state;
94	struct nsm_private	priv;
95};
96
97/*
98 * Contents of statd callback when monitored host rebooted
99 */
100#define NLMSVC_XDRSIZE		sizeof(struct nlm_args)
101
102bool	nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
103bool	nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
104bool	nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
105bool	nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
106bool	nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
107bool	nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
108bool	nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr);
109bool	nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
110bool	nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr);
111
112bool	nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
113bool	nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
114bool	nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
115bool	nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
116
117#endif /* LOCKD_XDR_H */
118