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
21 struct nsm_private {
22 unsigned char data[SM_PRIV_SIZE];
23 };
24
25 struct 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 */
39 struct 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
56 struct 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 */
65 struct 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 typedef struct nlm_args nlm_args;
77
78 /*
79 * Generic lockd result
80 */
81 struct 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 */
90 struct 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
102 bool nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
103 bool nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
104 bool nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
105 bool nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
106 bool nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
107 bool nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
108 bool nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr);
109 bool nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
110 bool nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr);
111
112 bool nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
113 bool nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
114 bool nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
115 bool nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
116
117 #endif /* LOCKD_XDR_H */
118
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