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
76/*
77 * Generic lockd result
78 */
79struct nlm_res {
80 struct nlm_cookie cookie;
81 __be32 status;
82 struct nlm_lock lock;
83};
84
85/*
86 * statd callback when client has rebooted
87 */
88struct nlm_reboot {
89 char *mon;
90 unsigned int len;
91 u32 state;
92 struct nsm_private priv;
93};
94
95/*
96 * Contents of statd callback when monitored host rebooted
97 */
98#define NLMSVC_XDRSIZE sizeof(struct nlm_args)
99
100bool nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
101bool nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
102bool nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
103bool nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
104bool nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
105bool nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
106bool nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr);
107bool nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
108bool nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr);
109
110bool nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
111bool nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
112bool nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
113bool nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
114
115#endif /* LOCKD_XDR_H */
116