xref: /openbmc/linux/fs/nfsd/xdr.h (revision 184416d4)
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