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
11struct nfsd_fhandle {
12	struct svc_fh		fh;
13};
14
15struct nfsd_sattrargs {
16	struct svc_fh		fh;
17	struct iattr		attrs;
18};
19
20struct nfsd_diropargs {
21	struct svc_fh		fh;
22	char *			name;
23	unsigned int		len;
24};
25
26struct nfsd_readargs {
27	struct svc_fh		fh;
28	__u32			offset;
29	__u32			count;
30};
31
32struct nfsd_writeargs {
33	svc_fh			fh;
34	__u32			offset;
35	__u32			len;
36	struct xdr_buf		payload;
37};
38
39struct nfsd_createargs {
40	struct svc_fh		fh;
41	char *			name;
42	unsigned int		len;
43	struct iattr		attrs;
44};
45
46struct 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
55struct nfsd_linkargs {
56	struct svc_fh		ffh;
57	struct svc_fh		tfh;
58	char *			tname;
59	unsigned int		tlen;
60};
61
62struct 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
72struct nfsd_readdirargs {
73	struct svc_fh		fh;
74	__u32			cookie;
75	__u32			count;
76};
77
78struct nfsd_stat {
79	__be32			status;
80};
81
82struct nfsd_attrstat {
83	__be32			status;
84	struct svc_fh		fh;
85	struct kstat		stat;
86};
87
88struct nfsd_diropres  {
89	__be32			status;
90	struct svc_fh		fh;
91	struct kstat		stat;
92};
93
94struct nfsd_readlinkres {
95	__be32			status;
96	int			len;
97	struct page		*page;
98};
99
100struct nfsd_readres {
101	__be32			status;
102	struct svc_fh		fh;
103	unsigned long		count;
104	struct kstat		stat;
105	struct page		**pages;
106};
107
108struct 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
121struct nfsd_statfsres {
122	__be32			status;
123	struct kstatfs		stats;
124};
125
126/*
127 * Storage requirements for XDR arguments and results.
128 */
129union 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
144bool nfssvc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
145bool nfssvc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
146bool nfssvc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
147bool nfssvc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
148bool nfssvc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
149bool nfssvc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
150bool nfssvc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
151bool nfssvc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
152bool nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
153bool nfssvc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
154
155bool nfssvc_encode_statres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
156bool nfssvc_encode_attrstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
157bool nfssvc_encode_diropres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
158bool nfssvc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
159bool nfssvc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
160bool nfssvc_encode_statfsres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
161bool nfssvc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
162
163void nfssvc_encode_nfscookie(struct nfsd_readdirres *resp, u32 offset);
164int nfssvc_encode_entry(void *data, const char *name, int namlen,
165			loff_t offset, u64 ino, unsigned int d_type);
166
167void nfssvc_release_attrstat(struct svc_rqst *rqstp);
168void nfssvc_release_diropres(struct svc_rqst *rqstp);
169void nfssvc_release_readres(struct svc_rqst *rqstp);
170
171/* Helper functions for NFSv2 ACL code */
172bool svcxdr_decode_fhandle(struct xdr_stream *xdr, struct svc_fh *fhp);
173bool svcxdr_encode_stat(struct xdr_stream *xdr, __be32 status);
174bool 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