fs/nfs/nfs42xdr.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
   4  */
   5 #ifndef __LINUX_FS_NFS_NFS4_2XDR_H
   6 #define __LINUX_FS_NFS_NFS4_2XDR_H
   7
   8 #include "nfs42.h"
   9
  10 #define encode_fallocate_maxsz          (encode_stateid_maxsz + \
  11                                          2 /* offset */ + \
  12                                          2 /* length */)
  13 #define NFS42_WRITE_RES_SIZE            (1 /* wr_callback_id size */ +\
  14                                          XDR_QUADLEN(NFS4_STATEID_SIZE) + \
  15                                          2 /* wr_count */ + \
  16                                          1 /* wr_committed */ + \
  17                                          XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  18 #define encode_allocate_maxsz           (op_encode_hdr_maxsz + \
  19                                          encode_fallocate_maxsz)
  20 #define decode_allocate_maxsz           (op_decode_hdr_maxsz)
  21 #define encode_copy_maxsz               (op_encode_hdr_maxsz +          \
  22                                          XDR_QUADLEN(NFS4_STATEID_SIZE) + \
  23                                          XDR_QUADLEN(NFS4_STATEID_SIZE) + \
  24                                          2 + 2 + 2 + 1 + 1 + 1)
  25 #define decode_copy_maxsz               (op_decode_hdr_maxsz + \
  26                                          NFS42_WRITE_RES_SIZE + \
  27                                          1 /* cr_consecutive */ + \
  28                                          1 /* cr_synchronous */)
  29 #define encode_offload_cancel_maxsz     (op_encode_hdr_maxsz + \
  30                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
  31 #define decode_offload_cancel_maxsz     (op_decode_hdr_maxsz)
  32 #define encode_deallocate_maxsz         (op_encode_hdr_maxsz + \
  33                                          encode_fallocate_maxsz)
  34 #define decode_deallocate_maxsz         (op_decode_hdr_maxsz)
  35 #define encode_seek_maxsz               (op_encode_hdr_maxsz + \
  36                                          encode_stateid_maxsz + \
  37                                          2 /* offset */ + \
  38                                          1 /* whence */)
  39 #define decode_seek_maxsz               (op_decode_hdr_maxsz + \
  40                                          1 /* eof */ + \
  41                                          1 /* whence */ + \
  42                                          2 /* offset */ + \
  43                                          2 /* length */)
  44 #define encode_io_info_maxsz            4
  45 #define encode_layoutstats_maxsz        (op_decode_hdr_maxsz + \
  46                                         2 /* offset */ + \
  47                                         2 /* length */ + \
  48                                         encode_stateid_maxsz + \
  49                                         encode_io_info_maxsz + \
  50                                         encode_io_info_maxsz + \
  51                                         1 /* opaque devaddr4 length */ + \
  52                                         XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))
  53 #define decode_layoutstats_maxsz        (op_decode_hdr_maxsz)
  54 #define encode_clone_maxsz              (encode_stateid_maxsz + \
  55                                         encode_stateid_maxsz + \
  56                                         2 /* src offset */ + \
  57                                         2 /* dst offset */ + \
  58                                         2 /* count */)
  59 #define decode_clone_maxsz              (op_decode_hdr_maxsz)
  60
  61 #define NFS4_enc_allocate_sz            (compound_encode_hdr_maxsz + \
  62                                          encode_sequence_maxsz + \
  63                                          encode_putfh_maxsz + \
  64                                          encode_allocate_maxsz + \
  65                                          encode_getattr_maxsz)
  66 #define NFS4_dec_allocate_sz            (compound_decode_hdr_maxsz + \
  67                                          decode_sequence_maxsz + \
  68                                          decode_putfh_maxsz + \
  69                                          decode_allocate_maxsz + \
  70                                          decode_getattr_maxsz)
  71 #define NFS4_enc_copy_sz                (compound_encode_hdr_maxsz + \
  72                                          encode_sequence_maxsz + \
  73                                          encode_putfh_maxsz + \
  74                                          encode_savefh_maxsz + \
  75                                          encode_putfh_maxsz + \
  76                                          encode_copy_maxsz + \
  77                                          encode_commit_maxsz)
  78 #define NFS4_dec_copy_sz                (compound_decode_hdr_maxsz + \
  79                                          decode_sequence_maxsz + \
  80                                          decode_putfh_maxsz + \
  81                                          decode_savefh_maxsz + \
  82                                          decode_putfh_maxsz + \
  83                                          decode_copy_maxsz + \
  84                                          decode_commit_maxsz)
  85 #define NFS4_enc_offload_cancel_sz      (compound_encode_hdr_maxsz + \
  86                                          encode_sequence_maxsz + \
  87                                          encode_putfh_maxsz + \
  88                                          encode_offload_cancel_maxsz)
  89 #define NFS4_dec_offload_cancel_sz      (compound_decode_hdr_maxsz + \
  90                                          decode_sequence_maxsz + \
  91                                          decode_putfh_maxsz + \
  92                                          decode_offload_cancel_maxsz)
  93 #define NFS4_enc_deallocate_sz          (compound_encode_hdr_maxsz + \
  94                                          encode_sequence_maxsz + \
  95                                          encode_putfh_maxsz + \
  96                                          encode_deallocate_maxsz + \
  97                                          encode_getattr_maxsz)
  98 #define NFS4_dec_deallocate_sz          (compound_decode_hdr_maxsz + \
  99                                          decode_sequence_maxsz + \
 100                                          decode_putfh_maxsz + \
 101                                          decode_deallocate_maxsz + \
 102                                          decode_getattr_maxsz)
 103 #define NFS4_enc_seek_sz                (compound_encode_hdr_maxsz + \
 104                                          encode_sequence_maxsz + \
 105                                          encode_putfh_maxsz + \
 106                                          encode_seek_maxsz)
 107 #define NFS4_dec_seek_sz                (compound_decode_hdr_maxsz + \
 108                                          decode_sequence_maxsz + \
 109                                          decode_putfh_maxsz + \
 110                                          decode_seek_maxsz)
 111 #define NFS4_enc_layoutstats_sz         (compound_encode_hdr_maxsz + \
 112                                          encode_sequence_maxsz + \
 113                                          encode_putfh_maxsz + \
 114                                          PNFS_LAYOUTSTATS_MAXDEV * encode_layoutstats_maxsz)
 115 #define NFS4_dec_layoutstats_sz         (compound_decode_hdr_maxsz + \
 116                                          decode_sequence_maxsz + \
 117                                          decode_putfh_maxsz + \
 118                                          PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
 119 #define NFS4_enc_clone_sz               (compound_encode_hdr_maxsz + \
 120                                          encode_sequence_maxsz + \
 121                                          encode_putfh_maxsz + \
 122                                          encode_savefh_maxsz + \
 123                                          encode_putfh_maxsz + \
 124                                          encode_clone_maxsz + \
 125                                          encode_getattr_maxsz)
 126 #define NFS4_dec_clone_sz               (compound_decode_hdr_maxsz + \
 127                                          decode_sequence_maxsz + \
 128                                          decode_putfh_maxsz + \
 129                                          decode_savefh_maxsz + \
 130                                          decode_putfh_maxsz + \
 131                                          decode_clone_maxsz + \
 132                                          decode_getattr_maxsz)
 133
 134 static void encode_fallocate(struct xdr_stream *xdr,
 135                              const struct nfs42_falloc_args *args)
 136 {
 137         encode_nfs4_stateid(xdr, &args->falloc_stateid);
 138         encode_uint64(xdr, args->falloc_offset);
 139         encode_uint64(xdr, args->falloc_length);
 140 }
 141
 142 static void encode_allocate(struct xdr_stream *xdr,
 143                             const struct nfs42_falloc_args *args,
 144                             struct compound_hdr *hdr)
 145 {
 146         encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
 147         encode_fallocate(xdr, args);
 148 }
 149
 150 static void encode_copy(struct xdr_stream *xdr,
 151                         const struct nfs42_copy_args *args,
 152                         struct compound_hdr *hdr)
 153 {
 154         encode_op_hdr(xdr, OP_COPY, decode_copy_maxsz, hdr);
 155         encode_nfs4_stateid(xdr, &args->src_stateid);
 156         encode_nfs4_stateid(xdr, &args->dst_stateid);
 157
 158         encode_uint64(xdr, args->src_pos);
 159         encode_uint64(xdr, args->dst_pos);
 160         encode_uint64(xdr, args->count);
 161
 162         encode_uint32(xdr, 1); /* consecutive = true */
 163         encode_uint32(xdr, args->sync);
 164         encode_uint32(xdr, 0); /* src server list */
 165 }
 166
 167 static void encode_offload_cancel(struct xdr_stream *xdr,
 168                                   const struct nfs42_offload_status_args *args,
 169                                   struct compound_hdr *hdr)
 170 {
 171         encode_op_hdr(xdr, OP_OFFLOAD_CANCEL, decode_offload_cancel_maxsz, hdr);
 172         encode_nfs4_stateid(xdr, &args->osa_stateid);
 173 }
 174
 175 static void encode_deallocate(struct xdr_stream *xdr,
 176                               const struct nfs42_falloc_args *args,
 177                               struct compound_hdr *hdr)
 178 {
 179         encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr);
 180         encode_fallocate(xdr, args);
 181 }
 182
 183 static void encode_seek(struct xdr_stream *xdr,
 184                         const struct nfs42_seek_args *args,
 185                         struct compound_hdr *hdr)
 186 {
 187         encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr);
 188         encode_nfs4_stateid(xdr, &args->sa_stateid);
 189         encode_uint64(xdr, args->sa_offset);
 190         encode_uint32(xdr, args->sa_what);
 191 }
 192
 193 static void encode_layoutstats(struct xdr_stream *xdr,
 194                                const struct nfs42_layoutstat_args *args,
 195                                struct nfs42_layoutstat_devinfo *devinfo,
 196                                struct compound_hdr *hdr)
 197 {
 198         __be32 *p;
 199
 200         encode_op_hdr(xdr, OP_LAYOUTSTATS, decode_layoutstats_maxsz, hdr);
 201         p = reserve_space(xdr, 8 + 8);
 202         p = xdr_encode_hyper(p, devinfo->offset);
 203         p = xdr_encode_hyper(p, devinfo->length);
 204         encode_nfs4_stateid(xdr, &args->stateid);
 205         p = reserve_space(xdr, 4*8 + NFS4_DEVICEID4_SIZE + 4);
 206         p = xdr_encode_hyper(p, devinfo->read_count);
 207         p = xdr_encode_hyper(p, devinfo->read_bytes);
 208         p = xdr_encode_hyper(p, devinfo->write_count);
 209         p = xdr_encode_hyper(p, devinfo->write_bytes);
 210         p = xdr_encode_opaque_fixed(p, devinfo->dev_id.data,
 211                         NFS4_DEVICEID4_SIZE);
 212         /* Encode layoutupdate4 */
 213         *p++ = cpu_to_be32(devinfo->layout_type);
 214         if (devinfo->ld_private.ops)
 215                 devinfo->ld_private.ops->encode(xdr, args,
 216                                 &devinfo->ld_private);
 217         else
 218                 encode_uint32(xdr, 0);
 219 }
 220
 221 static void encode_clone(struct xdr_stream *xdr,
 222                          const struct nfs42_clone_args *args,
 223                          struct compound_hdr *hdr)
 224 {
 225         __be32 *p;
 226
 227         encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
 228         encode_nfs4_stateid(xdr, &args->src_stateid);
 229         encode_nfs4_stateid(xdr, &args->dst_stateid);
 230         p = reserve_space(xdr, 3*8);
 231         p = xdr_encode_hyper(p, args->src_offset);
 232         p = xdr_encode_hyper(p, args->dst_offset);
 233         xdr_encode_hyper(p, args->count);
 234 }
 235
 236 /*
 237  * Encode ALLOCATE request
 238  */
 239 static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
 240                                   struct xdr_stream *xdr,
 241                                   const void *data)
 242 {
 243         const struct nfs42_falloc_args *args = data;
 244         struct compound_hdr hdr = {
 245                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 246         };
 247
 248         encode_compound_hdr(xdr, req, &hdr);
 249         encode_sequence(xdr, &args->seq_args, &hdr);
 250         encode_putfh(xdr, args->falloc_fh, &hdr);
 251         encode_allocate(xdr, args, &hdr);
 252         encode_getfattr(xdr, args->falloc_bitmask, &hdr);
 253         encode_nops(&hdr);
 254 }
 255
 256 static void encode_copy_commit(struct xdr_stream *xdr,
 257                           const struct nfs42_copy_args *args,
 258                           struct compound_hdr *hdr)
 259 {
 260         __be32 *p;
 261
 262         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
 263         p = reserve_space(xdr, 12);
 264         p = xdr_encode_hyper(p, args->dst_pos);
 265         *p = cpu_to_be32(args->count);
 266 }
 267
 268 /*
 269  * Encode COPY request
 270  */
 271 static void nfs4_xdr_enc_copy(struct rpc_rqst *req,
 272                               struct xdr_stream *xdr,
 273                               const void *data)
 274 {
 275         const struct nfs42_copy_args *args = data;
 276         struct compound_hdr hdr = {
 277                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 278         };
 279
 280         encode_compound_hdr(xdr, req, &hdr);
 281         encode_sequence(xdr, &args->seq_args, &hdr);
 282         encode_putfh(xdr, args->src_fh, &hdr);
 283         encode_savefh(xdr, &hdr);
 284         encode_putfh(xdr, args->dst_fh, &hdr);
 285         encode_copy(xdr, args, &hdr);
 286         if (args->sync)
 287                 encode_copy_commit(xdr, args, &hdr);
 288         encode_nops(&hdr);
 289 }
 290
 291 /*
 292  * Encode OFFLOAD_CANEL request
 293  */
 294 static void nfs4_xdr_enc_offload_cancel(struct rpc_rqst *req,
 295                                         struct xdr_stream *xdr,
 296                                         const void *data)
 297 {
 298         const struct nfs42_offload_status_args *args = data;
 299         struct compound_hdr hdr = {
 300                 .minorversion = nfs4_xdr_minorversion(&args->osa_seq_args),
 301         };
 302
 303         encode_compound_hdr(xdr, req, &hdr);
 304         encode_sequence(xdr, &args->osa_seq_args, &hdr);
 305         encode_putfh(xdr, args->osa_src_fh, &hdr);
 306         encode_offload_cancel(xdr, args, &hdr);
 307         encode_nops(&hdr);
 308 }
 309
 310 /*
 311  * Encode DEALLOCATE request
 312  */
 313 static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
 314                                     struct xdr_stream *xdr,
 315                                     const void *data)
 316 {
 317         const struct nfs42_falloc_args *args = data;
 318         struct compound_hdr hdr = {
 319                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 320         };
 321
 322         encode_compound_hdr(xdr, req, &hdr);
 323         encode_sequence(xdr, &args->seq_args, &hdr);
 324         encode_putfh(xdr, args->falloc_fh, &hdr);
 325         encode_deallocate(xdr, args, &hdr);
 326         encode_getfattr(xdr, args->falloc_bitmask, &hdr);
 327         encode_nops(&hdr);
 328 }
 329
 330 /*
 331  * Encode SEEK request
 332  */
 333 static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
 334                               struct xdr_stream *xdr,
 335                               const void *data)
 336 {
 337         const struct nfs42_seek_args *args = data;
 338         struct compound_hdr hdr = {
 339                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 340         };
 341
 342         encode_compound_hdr(xdr, req, &hdr);
 343         encode_sequence(xdr, &args->seq_args, &hdr);
 344         encode_putfh(xdr, args->sa_fh, &hdr);
 345         encode_seek(xdr, args, &hdr);
 346         encode_nops(&hdr);
 347 }
 348
 349 /*
 350  * Encode LAYOUTSTATS request
 351  */
 352 static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,
 353                                      struct xdr_stream *xdr,
 354                                      const void *data)
 355 {
 356         const struct nfs42_layoutstat_args *args = data;
 357         int i;
 358
 359         struct compound_hdr hdr = {
 360                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 361         };
 362
 363         encode_compound_hdr(xdr, req, &hdr);
 364         encode_sequence(xdr, &args->seq_args, &hdr);
 365         encode_putfh(xdr, args->fh, &hdr);
 366         WARN_ON(args->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
 367         for (i = 0; i < args->num_dev; i++)
 368                 encode_layoutstats(xdr, args, &args->devinfo[i], &hdr);
 369         encode_nops(&hdr);
 370 }
 371
 372 /*
 373  * Encode CLONE request
 374  */
 375 static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
 376                                struct xdr_stream *xdr,
 377                                const void *data)
 378 {
 379         const struct nfs42_clone_args *args = data;
 380         struct compound_hdr hdr = {
 381                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 382         };
 383
 384         encode_compound_hdr(xdr, req, &hdr);
 385         encode_sequence(xdr, &args->seq_args, &hdr);
 386         encode_putfh(xdr, args->src_fh, &hdr);
 387         encode_savefh(xdr, &hdr);
 388         encode_putfh(xdr, args->dst_fh, &hdr);
 389         encode_clone(xdr, args, &hdr);
 390         encode_getfattr(xdr, args->dst_bitmask, &hdr);
 391         encode_nops(&hdr);
 392 }
 393
 394 static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 395 {
 396         return decode_op_hdr(xdr, OP_ALLOCATE);
 397 }
 398
 399 static int decode_write_response(struct xdr_stream *xdr,
 400                                  struct nfs42_write_res *res)
 401 {
 402         __be32 *p;
 403         int status, count;
 404
 405         p = xdr_inline_decode(xdr, 4);
 406         if (unlikely(!p))
 407                 goto out_overflow;
 408         count = be32_to_cpup(p);
 409         if (count > 1)
 410                 return -EREMOTEIO;
 411         else if (count == 1) {
 412                 status = decode_opaque_fixed(xdr, &res->stateid,
 413                                 NFS4_STATEID_SIZE);
 414                 if (unlikely(status))
 415                         goto out_overflow;
 416         }
 417         p = xdr_inline_decode(xdr, 8 + 4);
 418         if (unlikely(!p))
 419                 goto out_overflow;
 420         p = xdr_decode_hyper(p, &res->count);
 421         res->verifier.committed = be32_to_cpup(p);
 422         return decode_verifier(xdr, &res->verifier.verifier);
 423
 424 out_overflow:
 425         print_overflow_msg(__func__, xdr);
 426         return -EIO;
 427 }
 428
 429 static int decode_copy_requirements(struct xdr_stream *xdr,
 430                                     struct nfs42_copy_res *res) {
 431         __be32 *p;
 432
 433         p = xdr_inline_decode(xdr, 4 + 4);
 434         if (unlikely(!p))
 435                 goto out_overflow;
 436
 437         res->consecutive = be32_to_cpup(p++);
 438         res->synchronous = be32_to_cpup(p++);
 439         return 0;
 440 out_overflow:
 441         print_overflow_msg(__func__, xdr);
 442         return -EIO;
 443 }
 444
 445 static int decode_copy(struct xdr_stream *xdr, struct nfs42_copy_res *res)
 446 {
 447         int status;
 448
 449         status = decode_op_hdr(xdr, OP_COPY);
 450         if (status == NFS4ERR_OFFLOAD_NO_REQS) {
 451                 status = decode_copy_requirements(xdr, res);
 452                 if (status)
 453                         return status;
 454                 return NFS4ERR_OFFLOAD_NO_REQS;
 455         } else if (status)
 456                 return status;
 457
 458         status = decode_write_response(xdr, &res->write_res);
 459         if (status)
 460                 return status;
 461
 462         return decode_copy_requirements(xdr, res);
 463 }
 464
 465 static int decode_offload_cancel(struct xdr_stream *xdr,
 466                                  struct nfs42_offload_status_res *res)
 467 {
 468         return decode_op_hdr(xdr, OP_OFFLOAD_CANCEL);
 469 }
 470
 471 static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 472 {
 473         return decode_op_hdr(xdr, OP_DEALLOCATE);
 474 }
 475
 476 static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res)
 477 {
 478         int status;
 479         __be32 *p;
 480
 481         status = decode_op_hdr(xdr, OP_SEEK);
 482         if (status)
 483                 return status;
 484
 485         p = xdr_inline_decode(xdr, 4 + 8);
 486         if (unlikely(!p))
 487                 goto out_overflow;
 488
 489         res->sr_eof = be32_to_cpup(p++);
 490         p = xdr_decode_hyper(p, &res->sr_offset);
 491         return 0;
 492
 493 out_overflow:
 494         print_overflow_msg(__func__, xdr);
 495         return -EIO;
 496 }
 497
 498 static int decode_layoutstats(struct xdr_stream *xdr)
 499 {
 500         return decode_op_hdr(xdr, OP_LAYOUTSTATS);
 501 }
 502
 503 static int decode_clone(struct xdr_stream *xdr)
 504 {
 505         return decode_op_hdr(xdr, OP_CLONE);
 506 }
 507
 508 /*
 509  * Decode ALLOCATE request
 510  */
 511 static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
 512                                  struct xdr_stream *xdr,
 513                                  void *data)
 514 {
 515         struct nfs42_falloc_res *res = data;
 516         struct compound_hdr hdr;
 517         int status;
 518
 519         status = decode_compound_hdr(xdr, &hdr);
 520         if (status)
 521                 goto out;
 522         status = decode_sequence(xdr, &res->seq_res, rqstp);
 523         if (status)
 524                 goto out;
 525         status = decode_putfh(xdr);
 526         if (status)
 527                 goto out;
 528         status = decode_allocate(xdr, res);
 529         if (status)
 530                 goto out;
 531         decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
 532 out:
 533         return status;
 534 }
 535
 536 /*
 537  * Decode COPY response
 538  */
 539 static int nfs4_xdr_dec_copy(struct rpc_rqst *rqstp,
 540                              struct xdr_stream *xdr,
 541                              void *data)
 542 {
 543         struct nfs42_copy_res *res = data;
 544         struct compound_hdr hdr;
 545         int status;
 546
 547         status = decode_compound_hdr(xdr, &hdr);
 548         if (status)
 549                 goto out;
 550         status = decode_sequence(xdr, &res->seq_res, rqstp);
 551         if (status)
 552                 goto out;
 553         status = decode_putfh(xdr);
 554         if (status)
 555                 goto out;
 556         status = decode_savefh(xdr);
 557         if (status)
 558                 goto out;
 559         status = decode_putfh(xdr);
 560         if (status)
 561                 goto out;
 562         status = decode_copy(xdr, res);
 563         if (status)
 564                 goto out;
 565         if (res->commit_res.verf)
 566                 status = decode_commit(xdr, &res->commit_res);
 567 out:
 568         return status;
 569 }
 570
 571 /*
 572  * Decode OFFLOAD_CANCEL response
 573  */
 574 static int nfs4_xdr_dec_offload_cancel(struct rpc_rqst *rqstp,
 575                                        struct xdr_stream *xdr,
 576                                        void *data)
 577 {
 578         struct nfs42_offload_status_res *res = data;
 579         struct compound_hdr hdr;
 580         int status;
 581
 582         status = decode_compound_hdr(xdr, &hdr);
 583         if (status)
 584                 goto out;
 585         status = decode_sequence(xdr, &res->osr_seq_res, rqstp);
 586         if (status)
 587                 goto out;
 588         status = decode_putfh(xdr);
 589         if (status)
 590                 goto out;
 591         status = decode_offload_cancel(xdr, res);
 592
 593 out:
 594         return status;
 595 }
 596
 597 /*
 598  * Decode DEALLOCATE request
 599  */
 600 static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
 601                                    struct xdr_stream *xdr,
 602                                    void *data)
 603 {
 604         struct nfs42_falloc_res *res = data;
 605         struct compound_hdr hdr;
 606         int status;
 607
 608         status = decode_compound_hdr(xdr, &hdr);
 609         if (status)
 610                 goto out;
 611         status = decode_sequence(xdr, &res->seq_res, rqstp);
 612         if (status)
 613                 goto out;
 614         status = decode_putfh(xdr);
 615         if (status)
 616                 goto out;
 617         status = decode_deallocate(xdr, res);
 618         if (status)
 619                 goto out;
 620         decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
 621 out:
 622         return status;
 623 }
 624
 625 /*
 626  * Decode SEEK request
 627  */
 628 static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp,
 629                              struct xdr_stream *xdr,
 630                              void *data)
 631 {
 632         struct nfs42_seek_res *res = data;
 633         struct compound_hdr hdr;
 634         int status;
 635
 636         status = decode_compound_hdr(xdr, &hdr);
 637         if (status)
 638                 goto out;
 639         status = decode_sequence(xdr, &res->seq_res, rqstp);
 640         if (status)
 641                 goto out;
 642         status = decode_putfh(xdr);
 643         if (status)
 644                 goto out;
 645         status = decode_seek(xdr, res);
 646 out:
 647         return status;
 648 }
 649
 650 /*
 651  * Decode LAYOUTSTATS request
 652  */
 653 static int nfs4_xdr_dec_layoutstats(struct rpc_rqst *rqstp,
 654                                     struct xdr_stream *xdr,
 655                                     void *data)
 656 {
 657         struct nfs42_layoutstat_res *res = data;
 658         struct compound_hdr hdr;
 659         int status, i;
 660
 661         status = decode_compound_hdr(xdr, &hdr);
 662         if (status)
 663                 goto out;
 664         status = decode_sequence(xdr, &res->seq_res, rqstp);
 665         if (status)
 666                 goto out;
 667         status = decode_putfh(xdr);
 668         if (status)
 669                 goto out;
 670         WARN_ON(res->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
 671         for (i = 0; i < res->num_dev; i++) {
 672                 status = decode_layoutstats(xdr);
 673                 if (status)
 674                         goto out;
 675         }
 676 out:
 677         res->rpc_status = status;
 678         return status;
 679 }
 680
 681 /*
 682  * Decode CLONE request
 683  */
 684 static int nfs4_xdr_dec_clone(struct rpc_rqst *rqstp,
 685                               struct xdr_stream *xdr,
 686                               void *data)
 687 {
 688         struct nfs42_clone_res *res = data;
 689         struct compound_hdr hdr;
 690         int status;
 691
 692         status = decode_compound_hdr(xdr, &hdr);
 693         if (status)
 694                 goto out;
 695         status = decode_sequence(xdr, &res->seq_res, rqstp);
 696         if (status)
 697                 goto out;
 698         status = decode_putfh(xdr);
 699         if (status)
 700                 goto out;
 701         status = decode_savefh(xdr);
 702         if (status)
 703                 goto out;
 704         status = decode_putfh(xdr);
 705         if (status)
 706                 goto out;
 707         status = decode_clone(xdr);
 708         if (status)
 709                 goto out;
 710         decode_getfattr(xdr, res->dst_fattr, res->server);
 711 out:
 712         res->rpc_status = status;
 713         return status;
 714 }
 715
 716 #endif /* __LINUX_FS_NFS_NFS4_2XDR_H */