fs/nfs/nfs42xdr.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2014 Anna Schumaker <[email protected]>
   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                                          1 + /* One cnr_source_server */\
  26                                          1 + /* nl4_type */ \
  27                                          1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
  28 #define decode_copy_maxsz               (op_decode_hdr_maxsz + \
  29                                          NFS42_WRITE_RES_SIZE + \
  30                                          1 /* cr_consecutive */ + \
  31                                          1 /* cr_synchronous */)
  32 #define encode_offload_cancel_maxsz     (op_encode_hdr_maxsz + \
  33                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
  34 #define decode_offload_cancel_maxsz     (op_decode_hdr_maxsz)
  35 #define encode_copy_notify_maxsz        (op_encode_hdr_maxsz + \
  36                                          XDR_QUADLEN(NFS4_STATEID_SIZE) + \
  37                                          1 + /* nl4_type */ \
  38                                          1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
  39 #define decode_copy_notify_maxsz        (op_decode_hdr_maxsz + \
  40                                          3 + /* cnr_lease_time */\
  41                                          XDR_QUADLEN(NFS4_STATEID_SIZE) + \
  42                                          1 + /* Support 1 cnr_source_server */\
  43                                          1 + /* nl4_type */ \
  44                                          1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
  45 #define encode_deallocate_maxsz         (op_encode_hdr_maxsz + \
  46                                          encode_fallocate_maxsz)
  47 #define decode_deallocate_maxsz         (op_decode_hdr_maxsz)
  48 #define encode_seek_maxsz               (op_encode_hdr_maxsz + \
  49                                          encode_stateid_maxsz + \
  50                                          2 /* offset */ + \
  51                                          1 /* whence */)
  52 #define decode_seek_maxsz               (op_decode_hdr_maxsz + \
  53                                          1 /* eof */ + \
  54                                          1 /* whence */ + \
  55                                          2 /* offset */ + \
  56                                          2 /* length */)
  57 #define encode_io_info_maxsz            4
  58 #define encode_layoutstats_maxsz        (op_decode_hdr_maxsz + \
  59                                         2 /* offset */ + \
  60                                         2 /* length */ + \
  61                                         encode_stateid_maxsz + \
  62                                         encode_io_info_maxsz + \
  63                                         encode_io_info_maxsz + \
  64                                         1 /* opaque devaddr4 length */ + \
  65                                         XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))
  66 #define decode_layoutstats_maxsz        (op_decode_hdr_maxsz)
  67 #define encode_device_error_maxsz       (XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
  68                                         1 /* status */ + 1 /* opnum */)
  69 #define encode_layouterror_maxsz        (op_decode_hdr_maxsz + \
  70                                         2 /* offset */ + \
  71                                         2 /* length */ + \
  72                                         encode_stateid_maxsz + \
  73                                         1 /* Array size */ + \
  74                                         encode_device_error_maxsz)
  75 #define decode_layouterror_maxsz        (op_decode_hdr_maxsz)
  76 #define encode_clone_maxsz              (encode_stateid_maxsz + \
  77                                         encode_stateid_maxsz + \
  78                                         2 /* src offset */ + \
  79                                         2 /* dst offset */ + \
  80                                         2 /* count */)
  81 #define decode_clone_maxsz              (op_decode_hdr_maxsz)
  82
  83 #define NFS4_enc_allocate_sz            (compound_encode_hdr_maxsz + \
  84                                          encode_sequence_maxsz + \
  85                                          encode_putfh_maxsz + \
  86                                          encode_allocate_maxsz + \
  87                                          encode_getattr_maxsz)
  88 #define NFS4_dec_allocate_sz            (compound_decode_hdr_maxsz + \
  89                                          decode_sequence_maxsz + \
  90                                          decode_putfh_maxsz + \
  91                                          decode_allocate_maxsz + \
  92                                          decode_getattr_maxsz)
  93 #define NFS4_enc_copy_sz                (compound_encode_hdr_maxsz + \
  94                                          encode_sequence_maxsz + \
  95                                          encode_putfh_maxsz + \
  96                                          encode_savefh_maxsz + \
  97                                          encode_putfh_maxsz + \
  98                                          encode_copy_maxsz + \
  99                                          encode_commit_maxsz)
 100 #define NFS4_dec_copy_sz                (compound_decode_hdr_maxsz + \
 101                                          decode_sequence_maxsz + \
 102                                          decode_putfh_maxsz + \
 103                                          decode_savefh_maxsz + \
 104                                          decode_putfh_maxsz + \
 105                                          decode_copy_maxsz + \
 106                                          decode_commit_maxsz)
 107 #define NFS4_enc_offload_cancel_sz      (compound_encode_hdr_maxsz + \
 108                                          encode_sequence_maxsz + \
 109                                          encode_putfh_maxsz + \
 110                                          encode_offload_cancel_maxsz)
 111 #define NFS4_dec_offload_cancel_sz      (compound_decode_hdr_maxsz + \
 112                                          decode_sequence_maxsz + \
 113                                          decode_putfh_maxsz + \
 114                                          decode_offload_cancel_maxsz)
 115 #define NFS4_enc_copy_notify_sz         (compound_encode_hdr_maxsz + \
 116                                          encode_putfh_maxsz + \
 117                                          encode_copy_notify_maxsz)
 118 #define NFS4_dec_copy_notify_sz         (compound_decode_hdr_maxsz + \
 119                                          decode_putfh_maxsz + \
 120                                          decode_copy_notify_maxsz)
 121 #define NFS4_enc_deallocate_sz          (compound_encode_hdr_maxsz + \
 122                                          encode_sequence_maxsz + \
 123                                          encode_putfh_maxsz + \
 124                                          encode_deallocate_maxsz + \
 125                                          encode_getattr_maxsz)
 126 #define NFS4_dec_deallocate_sz          (compound_decode_hdr_maxsz + \
 127                                          decode_sequence_maxsz + \
 128                                          decode_putfh_maxsz + \
 129                                          decode_deallocate_maxsz + \
 130                                          decode_getattr_maxsz)
 131 #define NFS4_enc_seek_sz                (compound_encode_hdr_maxsz + \
 132                                          encode_sequence_maxsz + \
 133                                          encode_putfh_maxsz + \
 134                                          encode_seek_maxsz)
 135 #define NFS4_dec_seek_sz                (compound_decode_hdr_maxsz + \
 136                                          decode_sequence_maxsz + \
 137                                          decode_putfh_maxsz + \
 138                                          decode_seek_maxsz)
 139 #define NFS4_enc_layoutstats_sz         (compound_encode_hdr_maxsz + \
 140                                          encode_sequence_maxsz + \
 141                                          encode_putfh_maxsz + \
 142                                          PNFS_LAYOUTSTATS_MAXDEV * encode_layoutstats_maxsz)
 143 #define NFS4_dec_layoutstats_sz         (compound_decode_hdr_maxsz + \
 144                                          decode_sequence_maxsz + \
 145                                          decode_putfh_maxsz + \
 146                                          PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
 147 #define NFS4_enc_layouterror_sz         (compound_encode_hdr_maxsz + \
 148                                          encode_sequence_maxsz + \
 149                                          encode_putfh_maxsz + \
 150                                          NFS42_LAYOUTERROR_MAX * \
 151                                          encode_layouterror_maxsz)
 152 #define NFS4_dec_layouterror_sz         (compound_decode_hdr_maxsz + \
 153                                          decode_sequence_maxsz + \
 154                                          decode_putfh_maxsz + \
 155                                          NFS42_LAYOUTERROR_MAX * \
 156                                          decode_layouterror_maxsz)
 157 #define NFS4_enc_clone_sz               (compound_encode_hdr_maxsz + \
 158                                          encode_sequence_maxsz + \
 159                                          encode_putfh_maxsz + \
 160                                          encode_savefh_maxsz + \
 161                                          encode_putfh_maxsz + \
 162                                          encode_clone_maxsz + \
 163                                          encode_getattr_maxsz)
 164 #define NFS4_dec_clone_sz               (compound_decode_hdr_maxsz + \
 165                                          decode_sequence_maxsz + \
 166                                          decode_putfh_maxsz + \
 167                                          decode_savefh_maxsz + \
 168                                          decode_putfh_maxsz + \
 169                                          decode_clone_maxsz + \
 170                                          decode_getattr_maxsz)
 171
 172 static void encode_fallocate(struct xdr_stream *xdr,
 173                              const struct nfs42_falloc_args *args)
 174 {
 175         encode_nfs4_stateid(xdr, &args->falloc_stateid);
 176         encode_uint64(xdr, args->falloc_offset);
 177         encode_uint64(xdr, args->falloc_length);
 178 }
 179
 180 static void encode_allocate(struct xdr_stream *xdr,
 181                             const struct nfs42_falloc_args *args,
 182                             struct compound_hdr *hdr)
 183 {
 184         encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
 185         encode_fallocate(xdr, args);
 186 }
 187
 188 static void encode_nl4_server(struct xdr_stream *xdr,
 189                               const struct nl4_server *ns)
 190 {
 191         encode_uint32(xdr, ns->nl4_type);
 192         switch (ns->nl4_type) {
 193         case NL4_NAME:
 194         case NL4_URL:
 195                 encode_string(xdr, ns->u.nl4_str_sz, ns->u.nl4_str);
 196                 break;
 197         case NL4_NETADDR:
 198                 encode_string(xdr, ns->u.nl4_addr.netid_len,
 199                               ns->u.nl4_addr.netid);
 200                 encode_string(xdr, ns->u.nl4_addr.addr_len,
 201                               ns->u.nl4_addr.addr);
 202                 break;
 203         default:
 204                 WARN_ON_ONCE(1);
 205         }
 206 }
 207
 208 static void encode_copy(struct xdr_stream *xdr,
 209                         const struct nfs42_copy_args *args,
 210                         struct compound_hdr *hdr)
 211 {
 212         encode_op_hdr(xdr, OP_COPY, decode_copy_maxsz, hdr);
 213         encode_nfs4_stateid(xdr, &args->src_stateid);
 214         encode_nfs4_stateid(xdr, &args->dst_stateid);
 215
 216         encode_uint64(xdr, args->src_pos);
 217         encode_uint64(xdr, args->dst_pos);
 218         encode_uint64(xdr, args->count);
 219
 220         encode_uint32(xdr, 1); /* consecutive = true */
 221         encode_uint32(xdr, args->sync);
 222         if (args->cp_src == NULL) { /* intra-ssc */
 223                 encode_uint32(xdr, 0); /* no src server list */
 224                 return;
 225         }
 226         encode_uint32(xdr, 1); /* supporting 1 server */
 227         encode_nl4_server(xdr, args->cp_src);
 228 }
 229
 230 static void encode_offload_cancel(struct xdr_stream *xdr,
 231                                   const struct nfs42_offload_status_args *args,
 232                                   struct compound_hdr *hdr)
 233 {
 234         encode_op_hdr(xdr, OP_OFFLOAD_CANCEL, decode_offload_cancel_maxsz, hdr);
 235         encode_nfs4_stateid(xdr, &args->osa_stateid);
 236 }
 237
 238 static void encode_copy_notify(struct xdr_stream *xdr,
 239                                const struct nfs42_copy_notify_args *args,
 240                                struct compound_hdr *hdr)
 241 {
 242         encode_op_hdr(xdr, OP_COPY_NOTIFY, decode_copy_notify_maxsz, hdr);
 243         encode_nfs4_stateid(xdr, &args->cna_src_stateid);
 244         encode_nl4_server(xdr, &args->cna_dst);
 245 }
 246
 247 static void encode_deallocate(struct xdr_stream *xdr,
 248                               const struct nfs42_falloc_args *args,
 249                               struct compound_hdr *hdr)
 250 {
 251         encode_op_hdr(xdr, OP_DEALLOCATE, decode_deallocate_maxsz, hdr);
 252         encode_fallocate(xdr, args);
 253 }
 254
 255 static void encode_seek(struct xdr_stream *xdr,
 256                         const struct nfs42_seek_args *args,
 257                         struct compound_hdr *hdr)
 258 {
 259         encode_op_hdr(xdr, OP_SEEK, decode_seek_maxsz, hdr);
 260         encode_nfs4_stateid(xdr, &args->sa_stateid);
 261         encode_uint64(xdr, args->sa_offset);
 262         encode_uint32(xdr, args->sa_what);
 263 }
 264
 265 static void encode_layoutstats(struct xdr_stream *xdr,
 266                                const struct nfs42_layoutstat_args *args,
 267                                struct nfs42_layoutstat_devinfo *devinfo,
 268                                struct compound_hdr *hdr)
 269 {
 270         __be32 *p;
 271
 272         encode_op_hdr(xdr, OP_LAYOUTSTATS, decode_layoutstats_maxsz, hdr);
 273         p = reserve_space(xdr, 8 + 8);
 274         p = xdr_encode_hyper(p, devinfo->offset);
 275         p = xdr_encode_hyper(p, devinfo->length);
 276         encode_nfs4_stateid(xdr, &args->stateid);
 277         p = reserve_space(xdr, 4*8 + NFS4_DEVICEID4_SIZE + 4);
 278         p = xdr_encode_hyper(p, devinfo->read_count);
 279         p = xdr_encode_hyper(p, devinfo->read_bytes);
 280         p = xdr_encode_hyper(p, devinfo->write_count);
 281         p = xdr_encode_hyper(p, devinfo->write_bytes);
 282         p = xdr_encode_opaque_fixed(p, devinfo->dev_id.data,
 283                         NFS4_DEVICEID4_SIZE);
 284         /* Encode layoutupdate4 */
 285         *p++ = cpu_to_be32(devinfo->layout_type);
 286         if (devinfo->ld_private.ops)
 287                 devinfo->ld_private.ops->encode(xdr, args,
 288                                 &devinfo->ld_private);
 289         else
 290                 encode_uint32(xdr, 0);
 291 }
 292
 293 static void encode_clone(struct xdr_stream *xdr,
 294                          const struct nfs42_clone_args *args,
 295                          struct compound_hdr *hdr)
 296 {
 297         __be32 *p;
 298
 299         encode_op_hdr(xdr, OP_CLONE, decode_clone_maxsz, hdr);
 300         encode_nfs4_stateid(xdr, &args->src_stateid);
 301         encode_nfs4_stateid(xdr, &args->dst_stateid);
 302         p = reserve_space(xdr, 3*8);
 303         p = xdr_encode_hyper(p, args->src_offset);
 304         p = xdr_encode_hyper(p, args->dst_offset);
 305         xdr_encode_hyper(p, args->count);
 306 }
 307
 308 static void encode_device_error(struct xdr_stream *xdr,
 309                                 const struct nfs42_device_error *error)
 310 {
 311         __be32 *p;
 312
 313         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 2*4);
 314         p = xdr_encode_opaque_fixed(p, error->dev_id.data,
 315                         NFS4_DEVICEID4_SIZE);
 316         *p++ = cpu_to_be32(error->status);
 317         *p = cpu_to_be32(error->opnum);
 318 }
 319
 320 static void encode_layouterror(struct xdr_stream *xdr,
 321                                const struct nfs42_layout_error *args,
 322                                struct compound_hdr *hdr)
 323 {
 324         __be32 *p;
 325
 326         encode_op_hdr(xdr, OP_LAYOUTERROR, decode_layouterror_maxsz, hdr);
 327         p = reserve_space(xdr, 8 + 8);
 328         p = xdr_encode_hyper(p, args->offset);
 329         p = xdr_encode_hyper(p, args->length);
 330         encode_nfs4_stateid(xdr, &args->stateid);
 331         p = reserve_space(xdr, 4);
 332         *p = cpu_to_be32(1);
 333         encode_device_error(xdr, &args->errors[0]);
 334 }
 335
 336 /*
 337  * Encode ALLOCATE request
 338  */
 339 static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
 340                                   struct xdr_stream *xdr,
 341                                   const void *data)
 342 {
 343         const struct nfs42_falloc_args *args = data;
 344         struct compound_hdr hdr = {
 345                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 346         };
 347
 348         encode_compound_hdr(xdr, req, &hdr);
 349         encode_sequence(xdr, &args->seq_args, &hdr);
 350         encode_putfh(xdr, args->falloc_fh, &hdr);
 351         encode_allocate(xdr, args, &hdr);
 352         encode_getfattr(xdr, args->falloc_bitmask, &hdr);
 353         encode_nops(&hdr);
 354 }
 355
 356 static void encode_copy_commit(struct xdr_stream *xdr,
 357                           const struct nfs42_copy_args *args,
 358                           struct compound_hdr *hdr)
 359 {
 360         __be32 *p;
 361
 362         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
 363         p = reserve_space(xdr, 12);
 364         p = xdr_encode_hyper(p, args->dst_pos);
 365         *p = cpu_to_be32(args->count);
 366 }
 367
 368 /*
 369  * Encode COPY request
 370  */
 371 static void nfs4_xdr_enc_copy(struct rpc_rqst *req,
 372                               struct xdr_stream *xdr,
 373                               const void *data)
 374 {
 375         const struct nfs42_copy_args *args = data;
 376         struct compound_hdr hdr = {
 377                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 378         };
 379
 380         encode_compound_hdr(xdr, req, &hdr);
 381         encode_sequence(xdr, &args->seq_args, &hdr);
 382         encode_putfh(xdr, args->src_fh, &hdr);
 383         encode_savefh(xdr, &hdr);
 384         encode_putfh(xdr, args->dst_fh, &hdr);
 385         encode_copy(xdr, args, &hdr);
 386         if (args->sync)
 387                 encode_copy_commit(xdr, args, &hdr);
 388         encode_nops(&hdr);
 389 }
 390
 391 /*
 392  * Encode OFFLOAD_CANEL request
 393  */
 394 static void nfs4_xdr_enc_offload_cancel(struct rpc_rqst *req,
 395                                         struct xdr_stream *xdr,
 396                                         const void *data)
 397 {
 398         const struct nfs42_offload_status_args *args = data;
 399         struct compound_hdr hdr = {
 400                 .minorversion = nfs4_xdr_minorversion(&args->osa_seq_args),
 401         };
 402
 403         encode_compound_hdr(xdr, req, &hdr);
 404         encode_sequence(xdr, &args->osa_seq_args, &hdr);
 405         encode_putfh(xdr, args->osa_src_fh, &hdr);
 406         encode_offload_cancel(xdr, args, &hdr);
 407         encode_nops(&hdr);
 408 }
 409
 410 /*
 411  * Encode COPY_NOTIFY request
 412  */
 413 static void nfs4_xdr_enc_copy_notify(struct rpc_rqst *req,
 414                                      struct xdr_stream *xdr,
 415                                      const void *data)
 416 {
 417         const struct nfs42_copy_notify_args *args = data;
 418         struct compound_hdr hdr = {
 419                 .minorversion = nfs4_xdr_minorversion(&args->cna_seq_args),
 420         };
 421
 422         encode_compound_hdr(xdr, req, &hdr);
 423         encode_sequence(xdr, &args->cna_seq_args, &hdr);
 424         encode_putfh(xdr, args->cna_src_fh, &hdr);
 425         encode_copy_notify(xdr, args, &hdr);
 426         encode_nops(&hdr);
 427 }
 428
 429 /*
 430  * Encode DEALLOCATE request
 431  */
 432 static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
 433                                     struct xdr_stream *xdr,
 434                                     const void *data)
 435 {
 436         const struct nfs42_falloc_args *args = data;
 437         struct compound_hdr hdr = {
 438                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 439         };
 440
 441         encode_compound_hdr(xdr, req, &hdr);
 442         encode_sequence(xdr, &args->seq_args, &hdr);
 443         encode_putfh(xdr, args->falloc_fh, &hdr);
 444         encode_deallocate(xdr, args, &hdr);
 445         encode_getfattr(xdr, args->falloc_bitmask, &hdr);
 446         encode_nops(&hdr);
 447 }
 448
 449 /*
 450  * Encode SEEK request
 451  */
 452 static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
 453                               struct xdr_stream *xdr,
 454                               const void *data)
 455 {
 456         const struct nfs42_seek_args *args = data;
 457         struct compound_hdr hdr = {
 458                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 459         };
 460
 461         encode_compound_hdr(xdr, req, &hdr);
 462         encode_sequence(xdr, &args->seq_args, &hdr);
 463         encode_putfh(xdr, args->sa_fh, &hdr);
 464         encode_seek(xdr, args, &hdr);
 465         encode_nops(&hdr);
 466 }
 467
 468 /*
 469  * Encode LAYOUTSTATS request
 470  */
 471 static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,
 472                                      struct xdr_stream *xdr,
 473                                      const void *data)
 474 {
 475         const struct nfs42_layoutstat_args *args = data;
 476         int i;
 477
 478         struct compound_hdr hdr = {
 479                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 480         };
 481
 482         encode_compound_hdr(xdr, req, &hdr);
 483         encode_sequence(xdr, &args->seq_args, &hdr);
 484         encode_putfh(xdr, args->fh, &hdr);
 485         WARN_ON(args->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
 486         for (i = 0; i < args->num_dev; i++)
 487                 encode_layoutstats(xdr, args, &args->devinfo[i], &hdr);
 488         encode_nops(&hdr);
 489 }
 490
 491 /*
 492  * Encode CLONE request
 493  */
 494 static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
 495                                struct xdr_stream *xdr,
 496                                const void *data)
 497 {
 498         const struct nfs42_clone_args *args = data;
 499         struct compound_hdr hdr = {
 500                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 501         };
 502
 503         encode_compound_hdr(xdr, req, &hdr);
 504         encode_sequence(xdr, &args->seq_args, &hdr);
 505         encode_putfh(xdr, args->src_fh, &hdr);
 506         encode_savefh(xdr, &hdr);
 507         encode_putfh(xdr, args->dst_fh, &hdr);
 508         encode_clone(xdr, args, &hdr);
 509         encode_getfattr(xdr, args->dst_bitmask, &hdr);
 510         encode_nops(&hdr);
 511 }
 512
 513 /*
 514  * Encode LAYOUTERROR request
 515  */
 516 static void nfs4_xdr_enc_layouterror(struct rpc_rqst *req,
 517                                      struct xdr_stream *xdr,
 518                                      const void *data)
 519 {
 520         const struct nfs42_layouterror_args *args = data;
 521         struct compound_hdr hdr = {
 522                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
 523         };
 524         int i;
 525
 526         encode_compound_hdr(xdr, req, &hdr);
 527         encode_sequence(xdr, &args->seq_args, &hdr);
 528         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
 529         for (i = 0; i < args->num_errors; i++)
 530                 encode_layouterror(xdr, &args->errors[i], &hdr);
 531         encode_nops(&hdr);
 532 }
 533
 534 static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 535 {
 536         return decode_op_hdr(xdr, OP_ALLOCATE);
 537 }
 538
 539 static int decode_write_response(struct xdr_stream *xdr,
 540                                  struct nfs42_write_res *res)
 541 {
 542         __be32 *p;
 543         int status, count;
 544
 545         p = xdr_inline_decode(xdr, 4);
 546         if (unlikely(!p))
 547                 return -EIO;
 548         count = be32_to_cpup(p);
 549         if (count > 1)
 550                 return -EREMOTEIO;
 551         else if (count == 1) {
 552                 status = decode_opaque_fixed(xdr, &res->stateid,
 553                                 NFS4_STATEID_SIZE);
 554                 if (unlikely(status))
 555                         return -EIO;
 556         }
 557         p = xdr_inline_decode(xdr, 8 + 4);
 558         if (unlikely(!p))
 559                 return -EIO;
 560         p = xdr_decode_hyper(p, &res->count);
 561         res->verifier.committed = be32_to_cpup(p);
 562         return decode_verifier(xdr, &res->verifier.verifier);
 563 }
 564
 565 static int decode_nl4_server(struct xdr_stream *xdr, struct nl4_server *ns)
 566 {
 567         struct nfs42_netaddr *naddr;
 568         uint32_t dummy;
 569         char *dummy_str;
 570         __be32 *p;
 571         int status;
 572
 573         /* nl_type */
 574         p = xdr_inline_decode(xdr, 4);
 575         if (unlikely(!p))
 576                 return -EIO;
 577         ns->nl4_type = be32_to_cpup(p);
 578         switch (ns->nl4_type) {
 579         case NL4_NAME:
 580         case NL4_URL:
 581                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
 582                 if (unlikely(status))
 583                         return status;
 584                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
 585                         return -EIO;
 586                 memcpy(&ns->u.nl4_str, dummy_str, dummy);
 587                 ns->u.nl4_str_sz = dummy;
 588                 break;
 589         case NL4_NETADDR:
 590                 naddr = &ns->u.nl4_addr;
 591
 592                 /* netid string */
 593                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
 594                 if (unlikely(status))
 595                         return status;
 596                 if (unlikely(dummy > RPCBIND_MAXNETIDLEN))
 597                         return -EIO;
 598                 naddr->netid_len = dummy;
 599                 memcpy(naddr->netid, dummy_str, naddr->netid_len);
 600
 601                 /* uaddr string */
 602                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
 603                 if (unlikely(status))
 604                         return status;
 605                 if (unlikely(dummy > RPCBIND_MAXUADDRLEN))
 606                         return -EIO;
 607                 naddr->addr_len = dummy;
 608                 memcpy(naddr->addr, dummy_str, naddr->addr_len);
 609                 break;
 610         default:
 611                 WARN_ON_ONCE(1);
 612                 return -EIO;
 613         }
 614         return 0;
 615 }
 616
 617 static int decode_copy_requirements(struct xdr_stream *xdr,
 618                                     struct nfs42_copy_res *res) {
 619         __be32 *p;
 620
 621         p = xdr_inline_decode(xdr, 4 + 4);
 622         if (unlikely(!p))
 623                 return -EIO;
 624
 625         res->consecutive = be32_to_cpup(p++);
 626         res->synchronous = be32_to_cpup(p++);
 627         return 0;
 628 }
 629
 630 static int decode_copy(struct xdr_stream *xdr, struct nfs42_copy_res *res)
 631 {
 632         int status;
 633
 634         status = decode_op_hdr(xdr, OP_COPY);
 635         if (status == NFS4ERR_OFFLOAD_NO_REQS) {
 636                 status = decode_copy_requirements(xdr, res);
 637                 if (status)
 638                         return status;
 639                 return NFS4ERR_OFFLOAD_NO_REQS;
 640         } else if (status)
 641                 return status;
 642
 643         status = decode_write_response(xdr, &res->write_res);
 644         if (status)
 645                 return status;
 646
 647         return decode_copy_requirements(xdr, res);
 648 }
 649
 650 static int decode_offload_cancel(struct xdr_stream *xdr,
 651                                  struct nfs42_offload_status_res *res)
 652 {
 653         return decode_op_hdr(xdr, OP_OFFLOAD_CANCEL);
 654 }
 655
 656 static int decode_copy_notify(struct xdr_stream *xdr,
 657                               struct nfs42_copy_notify_res *res)
 658 {
 659         __be32 *p;
 660         int status, count;
 661
 662         status = decode_op_hdr(xdr, OP_COPY_NOTIFY);
 663         if (status)
 664                 return status;
 665         /* cnr_lease_time */
 666         p = xdr_inline_decode(xdr, 12);
 667         if (unlikely(!p))
 668                 return -EIO;
 669         p = xdr_decode_hyper(p, &res->cnr_lease_time.seconds);
 670         res->cnr_lease_time.nseconds = be32_to_cpup(p);
 671
 672         status = decode_opaque_fixed(xdr, &res->cnr_stateid, NFS4_STATEID_SIZE);
 673         if (unlikely(status))
 674                 return -EIO;
 675
 676         /* number of source addresses */
 677         p = xdr_inline_decode(xdr, 4);
 678         if (unlikely(!p))
 679                 return -EIO;
 680
 681         count = be32_to_cpup(p);
 682         if (count > 1)
 683                 pr_warn("NFS: %s: nsvr %d > Supported. Use first servers\n",
 684                          __func__, count);
 685
 686         status = decode_nl4_server(xdr, &res->cnr_src);
 687         if (unlikely(status))
 688                 return -EIO;
 689         return 0;
 690 }
 691
 692 static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 693 {
 694         return decode_op_hdr(xdr, OP_DEALLOCATE);
 695 }
 696
 697 static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res)
 698 {
 699         int status;
 700         __be32 *p;
 701
 702         status = decode_op_hdr(xdr, OP_SEEK);
 703         if (status)
 704                 return status;
 705
 706         p = xdr_inline_decode(xdr, 4 + 8);
 707         if (unlikely(!p))
 708                 return -EIO;
 709
 710         res->sr_eof = be32_to_cpup(p++);
 711         p = xdr_decode_hyper(p, &res->sr_offset);
 712         return 0;
 713 }
 714
 715 static int decode_layoutstats(struct xdr_stream *xdr)
 716 {
 717         return decode_op_hdr(xdr, OP_LAYOUTSTATS);
 718 }
 719
 720 static int decode_clone(struct xdr_stream *xdr)
 721 {
 722         return decode_op_hdr(xdr, OP_CLONE);
 723 }
 724
 725 static int decode_layouterror(struct xdr_stream *xdr)
 726 {
 727         return decode_op_hdr(xdr, OP_LAYOUTERROR);
 728 }
 729
 730 /*
 731  * Decode ALLOCATE request
 732  */
 733 static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
 734                                  struct xdr_stream *xdr,
 735                                  void *data)
 736 {
 737         struct nfs42_falloc_res *res = data;
 738         struct compound_hdr hdr;
 739         int status;
 740
 741         status = decode_compound_hdr(xdr, &hdr);
 742         if (status)
 743                 goto out;
 744         status = decode_sequence(xdr, &res->seq_res, rqstp);
 745         if (status)
 746                 goto out;
 747         status = decode_putfh(xdr);
 748         if (status)
 749                 goto out;
 750         status = decode_allocate(xdr, res);
 751         if (status)
 752                 goto out;
 753         decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
 754 out:
 755         return status;
 756 }
 757
 758 /*
 759  * Decode COPY response
 760  */
 761 static int nfs4_xdr_dec_copy(struct rpc_rqst *rqstp,
 762                              struct xdr_stream *xdr,
 763                              void *data)
 764 {
 765         struct nfs42_copy_res *res = data;
 766         struct compound_hdr hdr;
 767         int status;
 768
 769         status = decode_compound_hdr(xdr, &hdr);
 770         if (status)
 771                 goto out;
 772         status = decode_sequence(xdr, &res->seq_res, rqstp);
 773         if (status)
 774                 goto out;
 775         status = decode_putfh(xdr);
 776         if (status)
 777                 goto out;
 778         status = decode_savefh(xdr);
 779         if (status)
 780                 goto out;
 781         status = decode_putfh(xdr);
 782         if (status)
 783                 goto out;
 784         status = decode_copy(xdr, res);
 785         if (status)
 786                 goto out;
 787         if (res->commit_res.verf)
 788                 status = decode_commit(xdr, &res->commit_res);
 789 out:
 790         return status;
 791 }
 792
 793 /*
 794  * Decode OFFLOAD_CANCEL response
 795  */
 796 static int nfs4_xdr_dec_offload_cancel(struct rpc_rqst *rqstp,
 797                                        struct xdr_stream *xdr,
 798                                        void *data)
 799 {
 800         struct nfs42_offload_status_res *res = data;
 801         struct compound_hdr hdr;
 802         int status;
 803
 804         status = decode_compound_hdr(xdr, &hdr);
 805         if (status)
 806                 goto out;
 807         status = decode_sequence(xdr, &res->osr_seq_res, rqstp);
 808         if (status)
 809                 goto out;
 810         status = decode_putfh(xdr);
 811         if (status)
 812                 goto out;
 813         status = decode_offload_cancel(xdr, res);
 814
 815 out:
 816         return status;
 817 }
 818
 819 /*
 820  * Decode COPY_NOTIFY response
 821  */
 822 static int nfs4_xdr_dec_copy_notify(struct rpc_rqst *rqstp,
 823                                     struct xdr_stream *xdr,
 824                                     void *data)
 825 {
 826         struct nfs42_copy_notify_res *res = data;
 827         struct compound_hdr hdr;
 828         int status;
 829
 830         status = decode_compound_hdr(xdr, &hdr);
 831         if (status)
 832                 goto out;
 833         status = decode_sequence(xdr, &res->cnr_seq_res, rqstp);
 834         if (status)
 835                 goto out;
 836         status = decode_putfh(xdr);
 837         if (status)
 838                 goto out;
 839         status = decode_copy_notify(xdr, res);
 840
 841 out:
 842         return status;
 843 }
 844
 845 /*
 846  * Decode DEALLOCATE request
 847  */
 848 static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
 849                                    struct xdr_stream *xdr,
 850                                    void *data)
 851 {
 852         struct nfs42_falloc_res *res = data;
 853         struct compound_hdr hdr;
 854         int status;
 855
 856         status = decode_compound_hdr(xdr, &hdr);
 857         if (status)
 858                 goto out;
 859         status = decode_sequence(xdr, &res->seq_res, rqstp);
 860         if (status)
 861                 goto out;
 862         status = decode_putfh(xdr);
 863         if (status)
 864                 goto out;
 865         status = decode_deallocate(xdr, res);
 866         if (status)
 867                 goto out;
 868         decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
 869 out:
 870         return status;
 871 }
 872
 873 /*
 874  * Decode SEEK request
 875  */
 876 static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp,
 877                              struct xdr_stream *xdr,
 878                              void *data)
 879 {
 880         struct nfs42_seek_res *res = data;
 881         struct compound_hdr hdr;
 882         int status;
 883
 884         status = decode_compound_hdr(xdr, &hdr);
 885         if (status)
 886                 goto out;
 887         status = decode_sequence(xdr, &res->seq_res, rqstp);
 888         if (status)
 889                 goto out;
 890         status = decode_putfh(xdr);
 891         if (status)
 892                 goto out;
 893         status = decode_seek(xdr, res);
 894 out:
 895         return status;
 896 }
 897
 898 /*
 899  * Decode LAYOUTSTATS request
 900  */
 901 static int nfs4_xdr_dec_layoutstats(struct rpc_rqst *rqstp,
 902                                     struct xdr_stream *xdr,
 903                                     void *data)
 904 {
 905         struct nfs42_layoutstat_res *res = data;
 906         struct compound_hdr hdr;
 907         int status, i;
 908
 909         status = decode_compound_hdr(xdr, &hdr);
 910         if (status)
 911                 goto out;
 912         status = decode_sequence(xdr, &res->seq_res, rqstp);
 913         if (status)
 914                 goto out;
 915         status = decode_putfh(xdr);
 916         if (status)
 917                 goto out;
 918         WARN_ON(res->num_dev > PNFS_LAYOUTSTATS_MAXDEV);
 919         for (i = 0; i < res->num_dev; i++) {
 920                 status = decode_layoutstats(xdr);
 921                 if (status)
 922                         goto out;
 923         }
 924 out:
 925         res->rpc_status = status;
 926         return status;
 927 }
 928
 929 /*
 930  * Decode CLONE request
 931  */
 932 static int nfs4_xdr_dec_clone(struct rpc_rqst *rqstp,
 933                               struct xdr_stream *xdr,
 934                               void *data)
 935 {
 936         struct nfs42_clone_res *res = data;
 937         struct compound_hdr hdr;
 938         int status;
 939
 940         status = decode_compound_hdr(xdr, &hdr);
 941         if (status)
 942                 goto out;
 943         status = decode_sequence(xdr, &res->seq_res, rqstp);
 944         if (status)
 945                 goto out;
 946         status = decode_putfh(xdr);
 947         if (status)
 948                 goto out;
 949         status = decode_savefh(xdr);
 950         if (status)
 951                 goto out;
 952         status = decode_putfh(xdr);
 953         if (status)
 954                 goto out;
 955         status = decode_clone(xdr);
 956         if (status)
 957                 goto out;
 958         status = decode_getfattr(xdr, res->dst_fattr, res->server);
 959
 960 out:
 961         res->rpc_status = status;
 962         return status;
 963 }
 964
 965 /*
 966  * Decode LAYOUTERROR request
 967  */
 968 static int nfs4_xdr_dec_layouterror(struct rpc_rqst *rqstp,
 969                                     struct xdr_stream *xdr,
 970                                     void *data)
 971 {
 972         struct nfs42_layouterror_res *res = data;
 973         struct compound_hdr hdr;
 974         int status, i;
 975
 976         status = decode_compound_hdr(xdr, &hdr);
 977         if (status)
 978                 goto out;
 979         status = decode_sequence(xdr, &res->seq_res, rqstp);
 980         if (status)
 981                 goto out;
 982         status = decode_putfh(xdr);
 983
 984         for (i = 0; i < res->num_errors && status == 0; i++)
 985                 status = decode_layouterror(xdr);
 986 out:
 987         res->rpc_status = status;
 988         return status;
 989 }
 990
 991 #endif /* __LINUX_FS_NFS_NFS4_2XDR_H */