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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
20struct nsm_private {
21 unsigned char data[SM_PRIV_SIZE];
22};
23
24struct 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 */
38struct 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 u64 lock_start;
45 u64 lock_len;
46 struct file_lock fl;
47};
48
49/*
50 * NLM cookies. Technically they can be 1K, but Linux only uses 8 bytes.
51 * FreeBSD uses 16, Apple Mac OS X 10.3 uses 20. Therefore we set it to
52 * 32 bytes.
53 */
54
55struct nlm_cookie
56{
57 unsigned char data[NLM_MAXCOOKIELEN];
58 unsigned int len;
59};
60
61/*
62 * Generic lockd arguments for all but sm_notify
63 */
64struct nlm_args {
65 struct nlm_cookie cookie;
66 struct nlm_lock lock;
67 u32 block;
68 u32 reclaim;
69 u32 state;
70 u32 monitor;
71 u32 fsm_access;
72 u32 fsm_mode;
73};
74
75typedef struct nlm_args nlm_args;
76
77/*
78 * Generic lockd result
79 */
80struct nlm_res {
81 struct nlm_cookie cookie;
82 __be32 status;
83 struct nlm_lock lock;
84};
85
86/*
87 * statd callback when client has rebooted
88 */
89struct nlm_reboot {
90 char *mon;
91 unsigned int len;
92 u32 state;
93 struct nsm_private priv;
94};
95
96/*
97 * Contents of statd callback when monitored host rebooted
98 */
99#define NLMSVC_XDRSIZE sizeof(struct nlm_args)
100
101bool nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
102bool nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
103bool nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
104bool nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
105bool nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
106bool nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
107bool nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr);
108bool nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
109bool nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr);
110
111bool nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
112bool nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
113bool nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
114bool nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
115
116#endif /* LOCKD_XDR_H */