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 };
31
32 struct nfsd_writeargs {
33 svc_fh fh;
34 __u32 offset;
35 __u32 len;
36 struct xdr_buf payload;
37 };
38
39 struct nfsd_createargs {
40 struct svc_fh fh;
41 char * name;
42 unsigned int len;
43 struct iattr attrs;
44 };
45
46 struct nfsd_renameargs {
47 struct svc_fh ffh;
48 char * fname;
49 unsigned int flen;
50 struct svc_fh tfh;
51 char * tname;
52 unsigned int tlen;
53 };
54
55 struct nfsd_linkargs {
56 struct svc_fh ffh;
57 struct svc_fh tfh;
58 char * tname;
59 unsigned int tlen;
60 };
61
62 struct nfsd_symlinkargs {
63 struct svc_fh ffh;
64 char * fname;
65 unsigned int flen;
66 char * tname;
67 unsigned int tlen;
68 struct iattr attrs;
69 struct kvec first;
70 };
71
72 struct nfsd_readdirargs {
73 struct svc_fh fh;
74 __u32 cookie;
75 __u32 count;
76 };
77
78 struct nfsd_stat {
79 __be32 status;
80 };
81
82 struct nfsd_attrstat {
83 __be32 status;
84 struct svc_fh fh;
85 struct kstat stat;
86 };
87
88 struct nfsd_diropres {
89 __be32 status;
90 struct svc_fh fh;
91 struct kstat stat;
92 };
93
94 struct nfsd_readlinkres {
95 __be32 status;
96 int len;
97 struct page *page;
98 };
99
100 struct nfsd_readres {
101 __be32 status;
102 struct svc_fh fh;
103 unsigned long count;
104 struct kstat stat;
105 struct page **pages;
106 };
107
108 struct nfsd_readdirres {
109 /* Components of the reply */
110 __be32 status;
111
112 int count;
113
114 /* Used to encode the reply's entry list */
115 struct xdr_stream xdr;
116 struct xdr_buf dirlist;
117 struct readdir_cd common;
118 unsigned int cookie_offset;
119 };
120
121 struct nfsd_statfsres {
122 __be32 status;
123 struct kstatfs stats;
124 };
125
126 /*
127 * Storage requirements for XDR arguments and results.
128 */
129 union nfsd_xdrstore {
130 struct nfsd_sattrargs sattr;
131 struct nfsd_diropargs dirop;
132 struct nfsd_readargs read;
133 struct nfsd_writeargs write;
134 struct nfsd_createargs create;
135 struct nfsd_renameargs rename;
136 struct nfsd_linkargs link;
137 struct nfsd_symlinkargs symlink;
138 struct nfsd_readdirargs readdir;
139 };
140
141 #define NFS2_SVC_XDRSIZE sizeof(union nfsd_xdrstore)
142
143
144 bool nfssvc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
145 bool nfssvc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
146 bool nfssvc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
147 bool nfssvc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
148 bool nfssvc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
149 bool nfssvc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
150 bool nfssvc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
151 bool nfssvc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
152 bool nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
153 bool nfssvc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
154
155 bool nfssvc_encode_statres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
156 bool nfssvc_encode_attrstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
157 bool nfssvc_encode_diropres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
158 bool nfssvc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
159 bool nfssvc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
160 bool nfssvc_encode_statfsres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
161 bool nfssvc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
162
163 void nfssvc_encode_nfscookie(struct nfsd_readdirres *resp, u32 offset);
164 int nfssvc_encode_entry(void *data, const char *name, int namlen,
165 loff_t offset, u64 ino, unsigned int d_type);
166
167 void nfssvc_release_attrstat(struct svc_rqst *rqstp);
168 void nfssvc_release_diropres(struct svc_rqst *rqstp);
169 void nfssvc_release_readres(struct svc_rqst *rqstp);
170
171 /* Helper functions for NFSv2 ACL code */
172 bool svcxdr_decode_fhandle(struct xdr_stream *xdr, struct svc_fh *fhp);
173 bool svcxdr_encode_stat(struct xdr_stream *xdr, __be32 status);
174 bool svcxdr_encode_fattr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
175 const struct svc_fh *fhp, const struct kstat *stat);
176
177 #endif /* LINUX_NFSD_H */
178
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