1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* XDR types for nfsd. This is mainly a typing exercise. */
3 
4 #ifndef LINUX_NFSD_H
5 #define LINUX_NFSD_H
6 
7 #include <linux/vfs.h>
8 #include "nfsd.h"
9 #include "nfsfh.h"
10 
11 struct nfsd_fhandle {
12 	struct svc_fh		fh;
13 };
14 
15 struct nfsd_sattrargs {
16 	struct svc_fh		fh;
17 	struct iattr		attrs;
18 };
19 
20 struct nfsd_diropargs {
21 	struct svc_fh		fh;
22 	char *			name;
23 	unsigned int		len;
24 };
25 
26 struct nfsd_readargs {
27 	struct svc_fh		fh;
28 	__u32			offset;
29 	__u32			count;
30 	int			vlen;
31 };
32 
33 struct nfsd_writeargs {
34 	svc_fh			fh;
35 	__u32			offset;
36 	__u32			len;
37 	struct kvec		first;
38 };
39 
40 struct nfsd_createargs {
41 	struct svc_fh		fh;
42 	char *			name;
43 	unsigned int		len;
44 	struct iattr		attrs;
45 };
46 
47 struct nfsd_renameargs {
48 	struct svc_fh		ffh;
49 	char *			fname;
50 	unsigned int		flen;
51 	struct svc_fh		tfh;
52 	char *			tname;
53 	unsigned int		tlen;
54 };
55 
56 struct nfsd_readlinkargs {
57 	struct svc_fh		fh;
58 	char *			buffer;
59 };
60 
61 struct nfsd_linkargs {
62 	struct svc_fh		ffh;
63 	struct svc_fh		tfh;
64 	char *			tname;
65 	unsigned int		tlen;
66 };
67 
68 struct nfsd_symlinkargs {
69 	struct svc_fh		ffh;
70 	char *			fname;
71 	unsigned int		flen;
72 	char *			tname;
73 	unsigned int		tlen;
74 	struct iattr		attrs;
75 	struct kvec		first;
76 };
77 
78 struct nfsd_readdirargs {
79 	struct svc_fh		fh;
80 	__u32			cookie;
81 	__u32			count;
82 	__be32 *		buffer;
83 };
84 
85 struct nfsd_attrstat {
86 	struct svc_fh		fh;
87 	struct kstat		stat;
88 };
89 
90 struct nfsd_diropres  {
91 	struct svc_fh		fh;
92 	struct kstat		stat;
93 };
94 
95 struct nfsd_readlinkres {
96 	int			len;
97 };
98 
99 struct nfsd_readres {
100 	struct svc_fh		fh;
101 	unsigned long		count;
102 	struct kstat		stat;
103 };
104 
105 struct nfsd_readdirres {
106 	int			count;
107 
108 	struct readdir_cd	common;
109 	__be32 *		buffer;
110 	int			buflen;
111 	__be32 *		offset;
112 };
113 
114 struct nfsd_statfsres {
115 	struct kstatfs		stats;
116 };
117 
118 /*
119  * Storage requirements for XDR arguments and results.
120  */
121 union nfsd_xdrstore {
122 	struct nfsd_sattrargs	sattr;
123 	struct nfsd_diropargs	dirop;
124 	struct nfsd_readargs	read;
125 	struct nfsd_writeargs	write;
126 	struct nfsd_createargs	create;
127 	struct nfsd_renameargs	rename;
128 	struct nfsd_linkargs	link;
129 	struct nfsd_symlinkargs	symlink;
130 	struct nfsd_readdirargs	readdir;
131 };
132 
133 #define NFS2_SVC_XDRSIZE	sizeof(union nfsd_xdrstore)
134 
135 
136 int nfssvc_decode_void(struct svc_rqst *, __be32 *);
137 int nfssvc_decode_fhandle(struct svc_rqst *, __be32 *);
138 int nfssvc_decode_sattrargs(struct svc_rqst *, __be32 *);
139 int nfssvc_decode_diropargs(struct svc_rqst *, __be32 *);
140 int nfssvc_decode_readargs(struct svc_rqst *, __be32 *);
141 int nfssvc_decode_writeargs(struct svc_rqst *, __be32 *);
142 int nfssvc_decode_createargs(struct svc_rqst *, __be32 *);
143 int nfssvc_decode_renameargs(struct svc_rqst *, __be32 *);
144 int nfssvc_decode_readlinkargs(struct svc_rqst *, __be32 *);
145 int nfssvc_decode_linkargs(struct svc_rqst *, __be32 *);
146 int nfssvc_decode_symlinkargs(struct svc_rqst *, __be32 *);
147 int nfssvc_decode_readdirargs(struct svc_rqst *, __be32 *);
148 int nfssvc_encode_void(struct svc_rqst *, __be32 *);
149 int nfssvc_encode_attrstat(struct svc_rqst *, __be32 *);
150 int nfssvc_encode_diropres(struct svc_rqst *, __be32 *);
151 int nfssvc_encode_readlinkres(struct svc_rqst *, __be32 *);
152 int nfssvc_encode_readres(struct svc_rqst *, __be32 *);
153 int nfssvc_encode_statfsres(struct svc_rqst *, __be32 *);
154 int nfssvc_encode_readdirres(struct svc_rqst *, __be32 *);
155 
156 int nfssvc_encode_entry(void *, const char *name,
157 			int namlen, loff_t offset, u64 ino, unsigned int);
158 
159 void nfssvc_release_fhandle(struct svc_rqst *);
160 
161 /* Helper functions for NFSv2 ACL code */
162 __be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, struct kstat *stat);
163 __be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp);
164 
165 #endif /* LINUX_NFSD_H */
166