fs/nfsd/xdr.h

   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 */