kernel/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 #include "nfs42.h"
   8
   9 #define encode_fallocate_maxsz          (encode_stateid_maxsz + \
  10                                          2 /* offset */ + \
  11                                          2 /* length */)
  12 #define encode_allocate_maxsz           (op_encode_hdr_maxsz + \
  13                                          encode_fallocate_maxsz)
  14 #define decode_allocate_maxsz           (op_decode_hdr_maxsz)
  15 #define encode_deallocate_maxsz         (op_encode_hdr_maxsz + \
  16                                          encode_fallocate_maxsz)
  17 #define decode_deallocate_maxsz         (op_decode_hdr_maxsz)
  18 #define encode_seek_maxsz               (op_encode_hdr_maxsz + \
  19                                          encode_stateid_maxsz + \
  20                                          2 /* offset */ + \
  21                                          1 /* whence */)
  22 #define decode_seek_maxsz               (op_decode_hdr_maxsz + \
  23                                          1 /* eof */ + \
  24                                          1 /* whence */ + \
  25                                          2 /* offset */ + \
  26                                          2 /* length */)
  27 #define encode_io_info_maxsz            4
  28 #define encode_layoutstats_maxsz        (op_decode_hdr_maxsz + \
  29                                         2 /* offset */ + \
  30                                         2 /* length */ + \
  31                                         encode_stateid_maxsz + \
  32                                         encode_io_info_maxsz + \
  33                                         encode_io_info_maxsz + \
  34                                         1 /* opaque devaddr4 length */ + \
  35                                         XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))
  36 #define decode_layoutstats_maxsz        (op_decode_hdr_maxsz)
  37 #define encode_clone_maxsz              (encode_stateid_maxsz + \
  38                                         encode_stateid_maxsz + \
  39                                         2 /* src offset */ + \
  40                                         2 /* dst offset */ + \
  41                                         2 /* count */)
  42 #define decode_clone_maxsz              (op_decode_hdr_maxsz)
  43
  44 #define NFS4_enc_allocate_sz            (compound_encode_hdr_maxsz + \
  45                                          encode_putfh_maxsz + \
  46                                          encode_allocate_maxsz + \
  47                                          encode_getattr_maxsz)
  48 #define NFS4_dec_allocate_sz            (compound_decode_hdr_maxsz + \
  49                                          decode_putfh_maxsz + \
  50                                          decode_allocate_maxsz + \
  51                                          decode_getattr_maxsz)
  52 #define NFS4_enc_deallocate_sz          (compound_encode_hdr_maxsz + \
  53                                          encode_putfh_maxsz + \
  54                                          encode_deallocate_maxsz + \
  55                                          encode_getattr_maxsz)
  56 #define NFS4_dec_deallocate_sz          (compound_decode_hdr_maxsz + \
  57                                          decode_putfh_maxsz + \
  58                                          decode_deallocate_maxsz + \
  59                                          decode_getattr_maxsz)
  60 #define NFS4_enc_seek_sz                (compound_encode_hdr_maxsz + \
  61                                          encode_putfh_maxsz + \
  62                                          encode_seek_maxsz)
  63 #define NFS4_dec_seek_sz                (compound_decode_hdr_maxsz + \
  64                                          decode_putfh_maxsz + \
  65                                          decode_seek_maxsz)
  66 #define NFS4_enc_layoutstats_sz         (compound_encode_hdr_maxsz + \
  67                                          encode_sequence_maxsz + \
  68                                          encode_putfh_maxsz + \
  69                                          PNFS_LAYOUTSTATS_MAXDEV * encode_layoutstats_maxsz)
  70 #define NFS4_dec_layoutstats_sz         (compound_decode_hdr_maxsz + \
  71                                          decode_sequence_maxsz + \
  72                                          decode_putfh_maxsz + \
  73                                          PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
  74 #define NFS4_enc_clone_sz               (compound_encode_hdr_maxsz + \
  75                                          encode_sequence_maxsz + \
  76                                          encode_putfh_maxsz + \
  77                                          encode_savefh_maxsz + \
  78                                          encode_putfh_maxsz + \
  79                                          encode_clone_maxsz + \
  80                                          encode_getattr_maxsz)
  81 #define NFS4_dec_clone_sz               (compound_decode_hdr_maxsz + \
  82                                          decode_sequence_maxsz + \
  83                                          decode_putfh_maxsz + \
  84                                          decode_savefh_maxsz + \
  85                                          decode_putfh_maxsz + \
  86                                          decode_clone_maxsz + \
  87                                          decode_getattr_maxsz)
  88
  89 static void encode_fallocate(struct xdr_stream *xdr,
  90                              struct nfs42_falloc_args *args)
  91 {
  92         encode_nfs4_stateid(xdr, &args->falloc_stateid);
  93         encode_uint64(xdr, args->falloc_offset);
  94         encode_uint64(xdr, args->falloc_length);
  95 }
  96
  97 static void encode_allocate(struct xdr_stream *xdr,
  98                             struct nfs42_falloc_args *args,
  99                             struct compound_hdr *hdr)
 100 {
 101         encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
 102         encode_fallocate(xdr, args);
 103 }
 104
 105 static void encode_deallocate(struct xdr_stream *xdr,
 106                               struct nfs42_falloc_args *args,
 107                               struct compound_hdr *hdr)
 108 {
 109         encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr);
 110         encode_fallocate(xdr, args);
 111 }
 112
 113 static void encode_seek(struct xdr_stream *xdr,
 114                         struct nfs42_seek_args *args,
 115                         struct compound_hdr *hdr)
 116 {
 117         encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr);
 118         encode_nfs4_stateid(xdr, &args->sa_stateid);
 119         encode_uint64(xdr, args->sa_offset);
 120         encode_uint32(xdr, args->sa_what);
 121 }
 122
 123 static void encode_layoutstats(struct xdr_stream *xdr,
 124                                struct nfs42_layoutstat_args *args,
 125                                struct nfs42_layoutstat_devinfo *devinfo,
 126                                struct compound_hdr *hdr)
 127 {
 128         __be32 *p;
 129
 130         encode_op_hdr(xdr, OP_LAYOUTSTATS, decode_layoutstats_maxsz, hdr);
 131         p = reserve_space(xdr, 8 + 8);
 132         p = xdr_encode_hyper(p, devinfo->offset);
 133         p = xdr_encode_hyper(p, devinfo->length);
 134         encode_nfs4_stateid(xdr, &args->stateid);
 135         p = reserve_space(xdr, 4*8 + NFS4_DEVICEID4_SIZE + 4);
 136         p = xdr_encode_hyper(p, devinfo->read_count);
 137         p = xdr_encode_hyper(p, devinfo->read_bytes);
 138         p = xdr_encode_hyper(p, devinfo->write_count);
 139         p = xdr_encode_hyper(p, devinfo->write_bytes);
 140         p = xdr_encode_opaque_fixed(p, devinfo->dev_id.data,
 141                         NFS4_DEVICEID4_SIZE);
 142         /* Encode layoutupdate4 */
 143         *p++ = cpu_to_be32(devinfo->layout_type);
 144         if (devinfo->layoutstats_encode != NULL)
 145                 devinfo->layoutstats_encode(xdr, args, devinfo);
 146         else
 147                 encode_uint32(xdr, 0);
 148 }
 149
 150 static void encode_clone(struct xdr_stream *xdr,
 151                          struct nfs42_clone_args *args,
 152                          struct compound_hdr *hdr)
 153 {
 154         __be32 *p;
 155
 156         encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
 157         encode_nfs4_stateid(xdr, &args->src_stateid);
 158         encode_nfs4_stateid(xdr, &args->dst_stateid);
 159         p = reserve_space(xdr, 3*8);
 160         p = xdr_encode_hyper(p, args->src_offset);
 161         p = xdr_encode_hyper(p, args->dst_offset);
 162         xdr_encode_hyper(p, args->count);
 163 }
 164
 165 /*
 166  * Encode ALLOCATE request
 167  */
 168 static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
 169                                   struct xdr_stream *xdr,
 170                                   struct nfs42_falloc_args *args)
 171 {
 172         struct compound_hdr hdr = {
 173                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 174         };
 175
 176         encode_compound_hdr(xdr, req, &hdr);
 177         encode_sequence(xdr, &args->seq_args, &hdr);
 178         encode_putfh(xdr, args->falloc_fh, &hdr);
 179         encode_allocate(xdr, args, &hdr);
 180         encode_getfattr(xdr, args->falloc_bitmask, &hdr);
 181         encode_nops(&hdr);
 182 }
 183
 184 /*
 185  * Encode DEALLOCATE request
 186  */
 187 static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
 188                                     struct xdr_stream *xdr,
 189                                     struct nfs42_falloc_args *args)
 190 {
 191         struct compound_hdr hdr = {
 192                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 193         };
 194
 195         encode_compound_hdr(xdr, req, &hdr);
 196         encode_sequence(xdr, &args->seq_args, &hdr);
 197         encode_putfh(xdr, args->falloc_fh, &hdr);
 198         encode_deallocate(xdr, args, &hdr);
 199         encode_getfattr(xdr, args->falloc_bitmask, &hdr);
 200         encode_nops(&hdr);
 201 }
 202
 203 /*
 204  * Encode SEEK request
 205  */
 206 static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
 207                               struct xdr_stream *xdr,
 208                               struct nfs42_seek_args *args)
 209 {
 210         struct compound_hdr hdr = {
 211                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 212         };
 213
 214         encode_compound_hdr(xdr, req, &hdr);
 215         encode_sequence(xdr, &args->seq_args, &hdr);
 216         encode_putfh(xdr, args->sa_fh, &hdr);
 217         encode_seek(xdr, args, &hdr);
 218         encode_nops(&hdr);
 219 }
 220
 221 /*
 222  * Encode LAYOUTSTATS request
 223  */
 224 static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,
 225                                      struct xdr_stream *xdr,
 226                                      struct nfs42_layoutstat_args *args)
 227 {
 228         int i;
 229
 230         struct compound_hdr hdr = {
 231                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 232         };
 233
 234         encode_compound_hdr(xdr, req, &hdr);
 235         encode_sequence(xdr, &args->seq_args, &hdr);
 236         encode_putfh(xdr, args->fh, &hdr);
 237         WARN_ON(args->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
 238         for (i = 0; i < args->num_dev; i++)
 239                 encode_layoutstats(xdr, args, &args->devinfo[i], &hdr);
 240         encode_nops(&hdr);
 241 }
 242
 243 /*
 244  * Encode CLONE request
 245  */
 246 static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
 247                                struct xdr_stream *xdr,
 248                                struct nfs42_clone_args *args)
 249 {
 250         struct compound_hdr hdr = {
 251                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 252         };
 253
 254         encode_compound_hdr(xdr, req, &hdr);
 255         encode_sequence(xdr, &args->seq_args, &hdr);
 256         encode_putfh(xdr, args->src_fh, &hdr);
 257         encode_savefh(xdr, &hdr);
 258         encode_putfh(xdr, args->dst_fh, &hdr);
 259         encode_clone(xdr, args, &hdr);
 260         encode_getfattr(xdr, args->dst_bitmask, &hdr);
 261         encode_nops(&hdr);
 262 }
 263
 264 static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 265 {
 266         return decode_op_hdr(xdr, OP_ALLOCATE);
 267 }
 268
 269 static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 270 {
 271         return decode_op_hdr(xdr, OP_DEALLOCATE);
 272 }
 273
 274 static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res)
 275 {
 276         int status;
 277         __be32 *p;
 278
 279         status = decode_op_hdr(xdr, OP_SEEK);
 280         if (status)
 281                 return status;
 282
 283         p = xdr_inline_decode(xdr, 4 + 8);
 284         if (unlikely(!p))
 285                 goto out_overflow;
 286
 287         res->sr_eof = be32_to_cpup(p++);
 288         p = xdr_decode_hyper(p, &res->sr_offset);
 289         return 0;
 290
 291 out_overflow:
 292         print_overflow_msg(__func__, xdr);
 293         return -EIO;
 294 }
 295
 296 static int decode_layoutstats(struct xdr_stream *xdr)
 297 {
 298         return decode_op_hdr(xdr, OP_LAYOUTSTATS);
 299 }
 300
 301 static int decode_clone(struct xdr_stream *xdr)
 302 {
 303         return decode_op_hdr(xdr, OP_CLONE);
 304 }
 305
 306 /*
 307  * Decode ALLOCATE request
 308  */
 309 static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
 310                                  struct xdr_stream *xdr,
 311                                  struct nfs42_falloc_res *res)
 312 {
 313         struct compound_hdr hdr;
 314         int status;
 315
 316         status = decode_compound_hdr(xdr, &hdr);
 317         if (status)
 318                 goto out;
 319         status = decode_sequence(xdr, &res->seq_res, rqstp);
 320         if (status)
 321                 goto out;
 322         status = decode_putfh(xdr);
 323         if (status)
 324                 goto out;
 325         status = decode_allocate(xdr, res);
 326         if (status)
 327                 goto out;
 328         decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
 329 out:
 330         return status;
 331 }
 332
 333 /*
 334  * Decode DEALLOCATE request
 335  */
 336 static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
 337                                    struct xdr_stream *xdr,
 338                                    struct nfs42_falloc_res *res)
 339 {
 340         struct compound_hdr hdr;
 341         int status;
 342
 343         status = decode_compound_hdr(xdr, &hdr);
 344         if (status)
 345                 goto out;
 346         status = decode_sequence(xdr, &res->seq_res, rqstp);
 347         if (status)
 348                 goto out;
 349         status = decode_putfh(xdr);
 350         if (status)
 351                 goto out;
 352         status = decode_deallocate(xdr, res);
 353         if (status)
 354                 goto out;
 355         decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
 356 out:
 357         return status;
 358 }
 359
 360 /*
 361  * Decode SEEK request
 362  */
 363 static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp,
 364                              struct xdr_stream *xdr,
 365                              struct nfs42_seek_res *res)
 366 {
 367         struct compound_hdr hdr;
 368         int status;
 369
 370         status = decode_compound_hdr(xdr, &hdr);
 371         if (status)
 372                 goto out;
 373         status = decode_sequence(xdr, &res->seq_res, rqstp);
 374         if (status)
 375                 goto out;
 376         status = decode_putfh(xdr);
 377         if (status)
 378                 goto out;
 379         status = decode_seek(xdr, res);
 380 out:
 381         return status;
 382 }
 383
 384 /*
 385  * Decode LAYOUTSTATS request
 386  */
 387 static int nfs4_xdr_dec_layoutstats(struct rpc_rqst *rqstp,
 388                                     struct xdr_stream *xdr,
 389                                     struct nfs42_layoutstat_res *res)
 390 {
 391         struct compound_hdr hdr;
 392         int status, i;
 393
 394         status = decode_compound_hdr(xdr, &hdr);
 395         if (status)
 396                 goto out;
 397         status = decode_sequence(xdr, &res->seq_res, rqstp);
 398         if (status)
 399                 goto out;
 400         status = decode_putfh(xdr);
 401         if (status)
 402                 goto out;
 403         WARN_ON(res->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
 404         for (i = 0; i < res->num_dev; i++) {
 405                 status = decode_layoutstats(xdr);
 406                 if (status)
 407                         goto out;
 408         }
 409 out:
 410         res->rpc_status = status;
 411         return status;
 412 }
 413
 414 /*
 415  * Decode CLONE request
 416  */
 417 static int nfs4_xdr_dec_clone(struct rpc_rqst *rqstp,
 418                               struct xdr_stream *xdr,
 419                               struct nfs42_clone_res *res)
 420 {
 421         struct compound_hdr hdr;
 422         int status;
 423
 424         status = decode_compound_hdr(xdr, &hdr);
 425         if (status)
 426                 goto out;
 427         status = decode_sequence(xdr, &res->seq_res, rqstp);
 428         if (status)
 429                 goto out;
 430         status = decode_putfh(xdr);
 431         if (status)
 432                 goto out;
 433         status = decode_savefh(xdr);
 434         if (status)
 435                 goto out;
 436         status = decode_putfh(xdr);
 437         if (status)
 438                 goto out;
 439         status = decode_clone(xdr);
 440         if (status)
 441                 goto out;
 442         status = decode_getfattr(xdr, res->dst_fattr, res->server);
 443
 444 out:
 445         res->rpc_status = status;
 446         return status;
 447 }
 448
 449 #endif /* __LINUX_FS_NFS_NFS4_2XDR_H */