fs/nfs/nfs42xdr.c

   1 /*
   2  * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
   3  */
   4 #ifndef __LINUX_FS_NFS_NFS4_2XDR_H
   5 #define __LINUX_FS_NFS_NFS4_2XDR_H
   6
   7 #define encode_fallocate_maxsz          (encode_stateid_maxsz + \
   8                                          2 /* offset */ + \
   9                                          2 /* length */)
  10 #define encode_allocate_maxsz           (op_encode_hdr_maxsz + \
  11                                          encode_fallocate_maxsz)
  12 #define decode_allocate_maxsz           (op_decode_hdr_maxsz)
  13 #define encode_deallocate_maxsz         (op_encode_hdr_maxsz + \
  14                                          encode_fallocate_maxsz)
  15 #define decode_deallocate_maxsz         (op_decode_hdr_maxsz)
  16 #define encode_seek_maxsz               (op_encode_hdr_maxsz + \
  17                                          encode_stateid_maxsz + \
  18                                          2 /* offset */ + \
  19                                          1 /* whence */)
  20 #define decode_seek_maxsz               (op_decode_hdr_maxsz + \
  21                                          1 /* eof */ + \
  22                                          1 /* whence */ + \
  23                                          2 /* offset */ + \
  24                                          2 /* length */)
  25
  26 #define NFS4_enc_allocate_sz            (compound_encode_hdr_maxsz + \
  27                                          encode_putfh_maxsz + \
  28                                          encode_allocate_maxsz)
  29 #define NFS4_dec_allocate_sz            (compound_decode_hdr_maxsz + \
  30                                          decode_putfh_maxsz + \
  31                                          decode_allocate_maxsz)
  32 #define NFS4_enc_deallocate_sz          (compound_encode_hdr_maxsz + \
  33                                          encode_putfh_maxsz + \
  34                                          encode_deallocate_maxsz)
  35 #define NFS4_dec_deallocate_sz          (compound_decode_hdr_maxsz + \
  36                                          decode_putfh_maxsz + \
  37                                          decode_deallocate_maxsz)
  38 #define NFS4_enc_seek_sz                (compound_encode_hdr_maxsz + \
  39                                          encode_putfh_maxsz + \
  40                                          encode_seek_maxsz)
  41 #define NFS4_dec_seek_sz                (compound_decode_hdr_maxsz + \
  42                                          decode_putfh_maxsz + \
  43                                          decode_seek_maxsz)
  44
  45
  46 static void encode_fallocate(struct xdr_stream *xdr,
  47                              struct nfs42_falloc_args *args)
  48 {
  49         encode_nfs4_stateid(xdr, &args->falloc_stateid);
  50         encode_uint64(xdr, args->falloc_offset);
  51         encode_uint64(xdr, args->falloc_length);
  52 }
  53
  54 static void encode_allocate(struct xdr_stream *xdr,
  55                             struct nfs42_falloc_args *args,
  56                             struct compound_hdr *hdr)
  57 {
  58         encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
  59         encode_fallocate(xdr, args);
  60 }
  61
  62 static void encode_deallocate(struct xdr_stream *xdr,
  63                               struct nfs42_falloc_args *args,
  64                               struct compound_hdr *hdr)
  65 {
  66         encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr);
  67         encode_fallocate(xdr, args);
  68 }
  69
  70 static void encode_seek(struct xdr_stream *xdr,
  71                         struct nfs42_seek_args *args,
  72                         struct compound_hdr *hdr)
  73 {
  74         encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr);
  75         encode_nfs4_stateid(xdr, &args->sa_stateid);
  76         encode_uint64(xdr, args->sa_offset);
  77         encode_uint32(xdr, args->sa_what);
  78 }
  79
  80 /*
  81  * Encode ALLOCATE request
  82  */
  83 static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
  84                                   struct xdr_stream *xdr,
  85                                   struct nfs42_falloc_args *args)
  86 {
  87         struct compound_hdr hdr = {
  88                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
  89         };
  90
  91         encode_compound_hdr(xdr, req, &hdr);
  92         encode_sequence(xdr, &args->seq_args, &hdr);
  93         encode_putfh(xdr, args->falloc_fh, &hdr);
  94         encode_allocate(xdr, args, &hdr);
  95         encode_nops(&hdr);
  96 }
  97
  98 /*
  99  * Encode DEALLOCATE request
 100  */
 101 static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
 102                                     struct xdr_stream *xdr,
 103                                     struct nfs42_falloc_args *args)
 104 {
 105         struct compound_hdr hdr = {
 106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 107         };
 108
 109         encode_compound_hdr(xdr, req, &hdr);
 110         encode_sequence(xdr, &args->seq_args, &hdr);
 111         encode_putfh(xdr, args->falloc_fh, &hdr);
 112         encode_deallocate(xdr, args, &hdr);
 113         encode_nops(&hdr);
 114 }
 115
 116 /*
 117  * Encode SEEK request
 118  */
 119 static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
 120                               struct xdr_stream *xdr,
 121                               struct nfs42_seek_args *args)
 122 {
 123         struct compound_hdr hdr = {
 124                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 125         };
 126
 127         encode_compound_hdr(xdr, req, &hdr);
 128         encode_sequence(xdr, &args->seq_args, &hdr);
 129         encode_putfh(xdr, args->sa_fh, &hdr);
 130         encode_seek(xdr, args, &hdr);
 131         encode_nops(&hdr);
 132 }
 133
 134 static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 135 {
 136         return decode_op_hdr(xdr, OP_ALLOCATE);
 137 }
 138
 139 static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 140 {
 141         return decode_op_hdr(xdr, OP_DEALLOCATE);
 142 }
 143
 144 static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res)
 145 {
 146         int status;
 147         __be32 *p;
 148
 149         status = decode_op_hdr(xdr, OP_SEEK);
 150         if (status)
 151                 return status;
 152
 153         p = xdr_inline_decode(xdr, 4 + 8);
 154         if (unlikely(!p))
 155                 goto out_overflow;
 156
 157         res->sr_eof = be32_to_cpup(p++);
 158         p = xdr_decode_hyper(p, &res->sr_offset);
 159         return 0;
 160
 161 out_overflow:
 162         print_overflow_msg(__func__, xdr);
 163         return -EIO;
 164 }
 165
 166 /*
 167  * Decode ALLOCATE request
 168  */
 169 static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
 170                                  struct xdr_stream *xdr,
 171                                  struct nfs42_falloc_res *res)
 172 {
 173         struct compound_hdr hdr;
 174         int status;
 175
 176         status = decode_compound_hdr(xdr, &hdr);
 177         if (status)
 178                 goto out;
 179         status = decode_sequence(xdr, &res->seq_res, rqstp);
 180         if (status)
 181                 goto out;
 182         status = decode_putfh(xdr);
 183         if (status)
 184                 goto out;
 185         status = decode_allocate(xdr, res);
 186 out:
 187         return status;
 188 }
 189
 190 /*
 191  * Decode DEALLOCATE request
 192  */
 193 static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
 194                                    struct xdr_stream *xdr,
 195                                    struct nfs42_falloc_res *res)
 196 {
 197         struct compound_hdr hdr;
 198         int status;
 199
 200         status = decode_compound_hdr(xdr, &hdr);
 201         if (status)
 202                 goto out;
 203         status = decode_sequence(xdr, &res->seq_res, rqstp);
 204         if (status)
 205                 goto out;
 206         status = decode_putfh(xdr);
 207         if (status)
 208                 goto out;
 209         status = decode_deallocate(xdr, res);
 210 out:
 211         return status;
 212 }
 213
 214 /*
 215  * Decode SEEK request
 216  */
 217 static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp,
 218                              struct xdr_stream *xdr,
 219                              struct nfs42_seek_res *res)
 220 {
 221         struct compound_hdr hdr;
 222         int status;
 223
 224         status = decode_compound_hdr(xdr, &hdr);
 225         if (status)
 226                 goto out;
 227         status = decode_sequence(xdr, &res->seq_res, rqstp);
 228         if (status)
 229                 goto out;
 230         status = decode_putfh(xdr);
 231         if (status)
 232                 goto out;
 233         status = decode_seek(xdr, res);
 234 out:
 235         return status;
 236 }
 237 #endif /* __LINUX_FS_NFS_NFS4_2XDR_H */