fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55
  56 #include "nfs4_fs.h"
  57 #include "nfs4trace.h"
  58 #include "internal.h"
  59 #include "nfs4idmap.h"
  60 #include "nfs4session.h"
  61 #include "pnfs.h"
  62 #include "netns.h"
  63
  64 #define NFSDBG_FACILITY         NFSDBG_XDR
  65
  66 /* Mapping from NFS error code to "errno" error code. */
  67 #define errno_NFSERR_IO         EIO
  68
  69 struct compound_hdr;
  70 static int nfs4_stat_to_errno(int);
  71 static void encode_layoutget(struct xdr_stream *xdr,
  72                              const struct nfs4_layoutget_args *args,
  73                              struct compound_hdr *hdr);
  74 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
  75                              struct nfs4_layoutget_res *res);
  76
  77 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  78 #ifdef DEBUG
  79 #define NFS4_MAXTAGLEN          20
  80 #else
  81 #define NFS4_MAXTAGLEN          0
  82 #endif
  83
  84 /* lock,open owner id:
  85  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  86  */
  87 #define pagepad_maxsz           (1)
  88 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  89 #define lock_owner_id_maxsz     (1 + 1 + 4)
  90 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  91 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  92 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  93 #define op_encode_hdr_maxsz     (1)
  94 #define op_decode_hdr_maxsz     (2)
  95 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  96 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  97 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  98 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  99 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
 100                                 (NFS4_FHSIZE >> 2))
 101 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
 102 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 103 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 104 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 105 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 106                                 ((3+NFS4_FHSIZE) >> 2))
 107 #define nfs4_fattr_bitmap_maxsz 4
 108 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 109 #define nfstime4_maxsz          (3)
 110 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 111 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 112 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 113 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 114 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 115 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 116 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 117 #else
 118 #define nfs4_label_maxsz        0
 119 #endif
 120 /* We support only one layout type per file system */
 121 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 122 /* This is based on getfattr, which uses the most attributes: */
 123 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 124                                 3*nfstime4_maxsz + \
 125                                 nfs4_owner_maxsz + \
 126                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 127                                  decode_mdsthreshold_maxsz))
 128 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 129                                 nfs4_fattr_value_maxsz)
 130 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 131 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 132                                  1 + 2 + 1 + \
 133                                 nfs4_owner_maxsz + \
 134                                 nfs4_group_maxsz + \
 135                                 nfs4_label_maxsz + \
 136                                 1 + nfstime4_maxsz + \
 137                                 1 + nfstime4_maxsz)
 138 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 139 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 140 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 141 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 142 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 143 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 144  * layout types will be returned.
 145  */
 146 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 147                                  nfs4_fattr_bitmap_maxsz + 1 + \
 148                                  1 /* lease time */ + \
 149                                  2 /* max filesize */ + \
 150                                  2 /* max read */ + \
 151                                  2 /* max write */ + \
 152                                  nfstime4_maxsz /* time delta */ + \
 153                                  5 /* fs layout types */ + \
 154                                  1 /* layout blksize */ + \
 155                                  1 /* clone blksize */ + \
 156                                  1 /* change attr type */ + \
 157                                  1 /* xattr support */)
 158 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 159 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 160 #define encode_setclientid_maxsz \
 161                                 (op_encode_hdr_maxsz + \
 162                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 163                                 /* client name */ \
 164                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 165                                 1 /* sc_prog */ + \
 166                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 167                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 168                                 1) /* sc_cb_ident */
 169 #define decode_setclientid_maxsz \
 170                                 (op_decode_hdr_maxsz + \
 171                                 2 /* clientid */ + \
 172                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 173                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 174                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 175 #define encode_setclientid_confirm_maxsz \
 176                                 (op_encode_hdr_maxsz + \
 177                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 178 #define decode_setclientid_confirm_maxsz \
 179                                 (op_decode_hdr_maxsz)
 180 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 181 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 182 #define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 183 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 184 #define encode_share_access_maxsz \
 185                                 (2)
 186 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 187 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 188 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 189 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 190                                 2 + encode_share_access_maxsz + 2 + \
 191                                 open_owner_id_maxsz + \
 192                                 encode_opentype_maxsz + \
 193                                 encode_claim_null_maxsz)
 194 #define decode_space_limit_maxsz        (3)
 195 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 196 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 197                                 decode_space_limit_maxsz + \
 198                                 decode_ace_maxsz)
 199 #define decode_change_info_maxsz        (5)
 200 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 201                                 decode_stateid_maxsz + \
 202                                 decode_change_info_maxsz + 1 + \
 203                                 nfs4_fattr_bitmap_maxsz + \
 204                                 decode_delegation_maxsz)
 205 #define encode_open_confirm_maxsz \
 206                                 (op_encode_hdr_maxsz + \
 207                                  encode_stateid_maxsz + 1)
 208 #define decode_open_confirm_maxsz \
 209                                 (op_decode_hdr_maxsz + \
 210                                  decode_stateid_maxsz)
 211 #define encode_open_downgrade_maxsz \
 212                                 (op_encode_hdr_maxsz + \
 213                                  encode_stateid_maxsz + 1 + \
 214                                  encode_share_access_maxsz)
 215 #define decode_open_downgrade_maxsz \
 216                                 (op_decode_hdr_maxsz + \
 217                                  decode_stateid_maxsz)
 218 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 219                                  1 + encode_stateid_maxsz)
 220 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 221                                  decode_stateid_maxsz)
 222 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 223                                  encode_stateid_maxsz + \
 224                                  encode_attrs_maxsz)
 225 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 226                                  nfs4_fattr_bitmap_maxsz)
 227 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 228                                  encode_stateid_maxsz + 3)
 229 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2 + pagepad_maxsz)
 230 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 231                                  2 + encode_verifier_maxsz + 5 + \
 232                                 nfs4_label_maxsz)
 233 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 234                                  decode_verifier_maxsz + pagepad_maxsz)
 235 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 236 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1 + pagepad_maxsz)
 237 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 238                                  encode_stateid_maxsz + 4)
 239 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 240                                  2 + decode_verifier_maxsz)
 241 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 242 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 243                                  decode_verifier_maxsz)
 244 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 245                                 nfs4_name_maxsz)
 246 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 247                                  decode_change_info_maxsz)
 248 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 249                                 2 * nfs4_name_maxsz)
 250 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 251                                  decode_change_info_maxsz + \
 252                                  decode_change_info_maxsz)
 253 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 254                                 nfs4_name_maxsz)
 255 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 256 #define encode_lockowner_maxsz  (7)
 257 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 258                                  7 + \
 259                                  1 + encode_stateid_maxsz + 1 + \
 260                                  encode_lockowner_maxsz)
 261 #define decode_lock_denied_maxsz \
 262                                 (8 + decode_lockowner_maxsz)
 263 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 264                                  decode_lock_denied_maxsz)
 265 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 266                                 encode_lockowner_maxsz)
 267 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 268                                  decode_lock_denied_maxsz)
 269 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 270                                  encode_stateid_maxsz + \
 271                                  4)
 272 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 273                                  decode_stateid_maxsz)
 274 #define encode_release_lockowner_maxsz \
 275                                 (op_encode_hdr_maxsz + \
 276                                  encode_lockowner_maxsz)
 277 #define decode_release_lockowner_maxsz \
 278                                 (op_decode_hdr_maxsz)
 279 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 280 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 281 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 282                                 1 + nfs4_name_maxsz + \
 283                                 1 + \
 284                                 nfs4_fattr_maxsz)
 285 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 286 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 287                                 1 + 2 + nfs4_name_maxsz + \
 288                                 encode_attrs_maxsz)
 289 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 290                                 decode_change_info_maxsz + \
 291                                 nfs4_fattr_bitmap_maxsz)
 292 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 293 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 294 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 295 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 296 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 297 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 298                                  nfs4_fattr_bitmap_maxsz + 1 + pagepad_maxsz)
 299 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 300                                  encode_stateid_maxsz + 3)
 301 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 302 #define encode_fs_locations_maxsz \
 303                                 (encode_getattr_maxsz)
 304 #define decode_fs_locations_maxsz \
 305                                 (pagepad_maxsz)
 306 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 307 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 308
 309 #if defined(CONFIG_NFS_V4_1)
 310 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 311 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 312                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 313
 314 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 315                                 encode_verifier_maxsz + \
 316                                 1 /* co_ownerid.len */ + \
 317                                 /* eia_clientowner */ \
 318                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 319                                 1 /* flags */ + \
 320                                 1 /* spa_how */ + \
 321                                 /* max is SP4_MACH_CRED (for now) */ + \
 322                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 323                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 324                                 1 /* implementation id array of size 1 */ + \
 325                                 1 /* nii_domain */ + \
 326                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 327                                 1 /* nii_name */ + \
 328                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 329                                 3 /* nii_date */)
 330 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 331                                 2 /* eir_clientid */ + \
 332                                 1 /* eir_sequenceid */ + \
 333                                 1 /* eir_flags */ + \
 334                                 1 /* spr_how */ + \
 335                                   /* max is SP4_MACH_CRED (for now) */ + \
 336                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 337                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 338                                 2 /* eir_server_owner.so_minor_id */ + \
 339                                 /* eir_server_owner.so_major_id<> */ \
 340                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 341                                 /* eir_server_scope<> */ \
 342                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 343                                 1 /* eir_server_impl_id array length */ + \
 344                                 1 /* nii_domain */ + \
 345                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 346                                 1 /* nii_name */ + \
 347                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 348                                 3 /* nii_date */)
 349 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 350 #define decode_channel_attrs_maxsz  (6 + \
 351                                      1 /* ca_rdma_ird.len */ + \
 352                                      1 /* ca_rdma_ird */)
 353 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 354                                      2 /* csa_clientid */ + \
 355                                      1 /* csa_sequence */ + \
 356                                      1 /* csa_flags */ + \
 357                                      encode_channel_attrs_maxsz + \
 358                                      encode_channel_attrs_maxsz + \
 359                                      1 /* csa_cb_program */ + \
 360                                      1 /* csa_sec_parms.len (1) */ + \
 361                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 362                                      1 /* stamp */ + \
 363                                      1 /* machinename.len */ + \
 364                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 365                                      1 /* uid */ + \
 366                                      1 /* gid */ + \
 367                                      1 /* gids.len (0) */)
 368 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 369                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 370                                      1 /* csr_sequence */ + \
 371                                      1 /* csr_flags */ + \
 372                                      decode_channel_attrs_maxsz + \
 373                                      decode_channel_attrs_maxsz)
 374 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 375                                      /* bctsa_sessid */ \
 376                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 377                                      1 /* bctsa_dir */ + \
 378                                      1 /* bctsa_use_conn_in_rdma_mode */)
 379 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 380                                      /* bctsr_sessid */ \
 381                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 382                                      1 /* bctsr_dir */ + \
 383                                      1 /* bctsr_use_conn_in_rdma_mode */)
 384 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 385 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 386 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 387 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 388 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 389                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 390 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 391                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 392 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 393 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 394 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 395                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 396                                 1 /* layout type */ + \
 397                                 1 /* maxcount */ + \
 398                                 1 /* bitmap size */ + \
 399                                 1 /* notification bitmap length */ + \
 400                                 1 /* notification bitmap, word 0 */)
 401 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 402                                 1 /* layout type */ + \
 403                                 1 /* opaque devaddr4 length */ + \
 404                                   /* devaddr4 payload is read into page */ \
 405                                 1 /* notification bitmap length */ + \
 406                                 1 /* notification bitmap, word 0 */ + \
 407                                 pagepad_maxsz /* possible XDR padding */)
 408 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 409                                 encode_stateid_maxsz)
 410 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 411                                 decode_stateid_maxsz + \
 412                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + \
 413                                 pagepad_maxsz)
 414 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 415                                 2 /* offset */ + \
 416                                 2 /* length */ + \
 417                                 1 /* reclaim */ + \
 418                                 encode_stateid_maxsz + \
 419                                 1 /* new offset (true) */ + \
 420                                 2 /* last byte written */ + \
 421                                 1 /* nt_timechanged (false) */ + \
 422                                 1 /* layoutupdate4 layout type */ + \
 423                                 1 /* layoutupdate4 opaqueue len */)
 424                                   /* the actual content of layoutupdate4 should
 425                                      be allocated by drivers and spliced in
 426                                      using xdr_write_pages */
 427 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 428 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 429                                 encode_stateid_maxsz + \
 430                                 1 + \
 431                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 432 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 433                                 1 + decode_stateid_maxsz)
 434 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 435 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 436 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 437                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 438 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 439 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 440                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 441 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 442 #else /* CONFIG_NFS_V4_1 */
 443 #define encode_sequence_maxsz   0
 444 #define decode_sequence_maxsz   0
 445 #define encode_layoutreturn_maxsz 0
 446 #define decode_layoutreturn_maxsz 0
 447 #define encode_layoutget_maxsz  0
 448 #define decode_layoutget_maxsz  0
 449 #endif /* CONFIG_NFS_V4_1 */
 450
 451 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 452 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 453 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 454                                 encode_sequence_maxsz + \
 455                                 encode_putfh_maxsz + \
 456                                 encode_read_maxsz)
 457 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 458                                 decode_sequence_maxsz + \
 459                                 decode_putfh_maxsz + \
 460                                 decode_read_maxsz)
 461 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 462                                 encode_sequence_maxsz + \
 463                                 encode_putfh_maxsz + \
 464                                 encode_readlink_maxsz)
 465 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 466                                 decode_sequence_maxsz + \
 467                                 decode_putfh_maxsz + \
 468                                 decode_readlink_maxsz)
 469 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 470                                 encode_sequence_maxsz + \
 471                                 encode_putfh_maxsz + \
 472                                 encode_readdir_maxsz)
 473 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 474                                 decode_sequence_maxsz + \
 475                                 decode_putfh_maxsz + \
 476                                 decode_readdir_maxsz)
 477 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 478                                 encode_sequence_maxsz + \
 479                                 encode_putfh_maxsz + \
 480                                 encode_write_maxsz + \
 481                                 encode_getattr_maxsz)
 482 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 483                                 decode_sequence_maxsz + \
 484                                 decode_putfh_maxsz + \
 485                                 decode_write_maxsz + \
 486                                 decode_getattr_maxsz)
 487 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 488                                 encode_sequence_maxsz + \
 489                                 encode_putfh_maxsz + \
 490                                 encode_commit_maxsz)
 491 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 492                                 decode_sequence_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_commit_maxsz)
 495 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 496                                 encode_sequence_maxsz + \
 497                                 encode_putfh_maxsz + \
 498                                 encode_open_maxsz + \
 499                                 encode_access_maxsz + \
 500                                 encode_getfh_maxsz + \
 501                                 encode_getattr_maxsz + \
 502                                 encode_layoutget_maxsz)
 503 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 504                                 decode_sequence_maxsz + \
 505                                 decode_putfh_maxsz + \
 506                                 decode_open_maxsz + \
 507                                 decode_access_maxsz + \
 508                                 decode_getfh_maxsz + \
 509                                 decode_getattr_maxsz + \
 510                                 decode_layoutget_maxsz)
 511 #define NFS4_enc_open_confirm_sz \
 512                                 (compound_encode_hdr_maxsz + \
 513                                  encode_putfh_maxsz + \
 514                                  encode_open_confirm_maxsz)
 515 #define NFS4_dec_open_confirm_sz \
 516                                 (compound_decode_hdr_maxsz + \
 517                                  decode_putfh_maxsz + \
 518                                  decode_open_confirm_maxsz)
 519 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 520                                         encode_sequence_maxsz + \
 521                                         encode_putfh_maxsz + \
 522                                         encode_open_maxsz + \
 523                                         encode_access_maxsz + \
 524                                         encode_getattr_maxsz + \
 525                                         encode_layoutget_maxsz)
 526 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 527                                         decode_sequence_maxsz + \
 528                                         decode_putfh_maxsz + \
 529                                         decode_open_maxsz + \
 530                                         decode_access_maxsz + \
 531                                         decode_getattr_maxsz + \
 532                                         decode_layoutget_maxsz)
 533 #define NFS4_enc_open_downgrade_sz \
 534                                 (compound_encode_hdr_maxsz + \
 535                                  encode_sequence_maxsz + \
 536                                  encode_putfh_maxsz + \
 537                                  encode_layoutreturn_maxsz + \
 538                                  encode_open_downgrade_maxsz)
 539 #define NFS4_dec_open_downgrade_sz \
 540                                 (compound_decode_hdr_maxsz + \
 541                                  decode_sequence_maxsz + \
 542                                  decode_putfh_maxsz + \
 543                                  decode_layoutreturn_maxsz + \
 544                                  decode_open_downgrade_maxsz)
 545 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 546                                  encode_sequence_maxsz + \
 547                                  encode_putfh_maxsz + \
 548                                  encode_layoutreturn_maxsz + \
 549                                  encode_close_maxsz + \
 550                                  encode_getattr_maxsz)
 551 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 552                                  decode_sequence_maxsz + \
 553                                  decode_putfh_maxsz + \
 554                                  decode_layoutreturn_maxsz + \
 555                                  decode_close_maxsz + \
 556                                  decode_getattr_maxsz)
 557 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 558                                  encode_sequence_maxsz + \
 559                                  encode_putfh_maxsz + \
 560                                  encode_setattr_maxsz + \
 561                                  encode_getattr_maxsz)
 562 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 563                                  decode_sequence_maxsz + \
 564                                  decode_putfh_maxsz + \
 565                                  decode_setattr_maxsz + \
 566                                  decode_getattr_maxsz)
 567 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_fsinfo_maxsz)
 571 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 572                                 decode_sequence_maxsz + \
 573                                 decode_putfh_maxsz + \
 574                                 decode_fsinfo_maxsz)
 575 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 576                                 encode_renew_maxsz)
 577 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 578                                 decode_renew_maxsz)
 579 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 580                                 encode_setclientid_maxsz)
 581 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 582                                 decode_setclientid_maxsz)
 583 #define NFS4_enc_setclientid_confirm_sz \
 584                                 (compound_encode_hdr_maxsz + \
 585                                 encode_setclientid_confirm_maxsz)
 586 #define NFS4_dec_setclientid_confirm_sz \
 587                                 (compound_decode_hdr_maxsz + \
 588                                 decode_setclientid_confirm_maxsz)
 589 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 590                                 encode_sequence_maxsz + \
 591                                 encode_putfh_maxsz + \
 592                                 encode_lock_maxsz)
 593 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 594                                 decode_sequence_maxsz + \
 595                                 decode_putfh_maxsz + \
 596                                 decode_lock_maxsz)
 597 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 598                                 encode_sequence_maxsz + \
 599                                 encode_putfh_maxsz + \
 600                                 encode_lockt_maxsz)
 601 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 602                                  decode_sequence_maxsz + \
 603                                  decode_putfh_maxsz + \
 604                                  decode_lockt_maxsz)
 605 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 606                                 encode_sequence_maxsz + \
 607                                 encode_putfh_maxsz + \
 608                                 encode_locku_maxsz)
 609 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 610                                 decode_sequence_maxsz + \
 611                                 decode_putfh_maxsz + \
 612                                 decode_locku_maxsz)
 613 #define NFS4_enc_release_lockowner_sz \
 614                                 (compound_encode_hdr_maxsz + \
 615                                  encode_lockowner_maxsz)
 616 #define NFS4_dec_release_lockowner_sz \
 617                                 (compound_decode_hdr_maxsz + \
 618                                  decode_lockowner_maxsz)
 619 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 620                                 encode_sequence_maxsz + \
 621                                 encode_putfh_maxsz + \
 622                                 encode_access_maxsz + \
 623                                 encode_getattr_maxsz)
 624 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putfh_maxsz + \
 627                                 decode_access_maxsz + \
 628                                 decode_getattr_maxsz)
 629 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_getattr_maxsz + \
 633                                 encode_renew_maxsz)
 634 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 635                                 decode_sequence_maxsz + \
 636                                 decode_putfh_maxsz + \
 637                                 decode_getattr_maxsz + \
 638                                 decode_renew_maxsz)
 639 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 640                                 encode_sequence_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_lookup_maxsz + \
 643                                 encode_getattr_maxsz + \
 644                                 encode_getfh_maxsz)
 645 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 646                                 decode_sequence_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_lookup_maxsz + \
 649                                 decode_getattr_maxsz + \
 650                                 decode_getfh_maxsz)
 651 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 652                                 encode_sequence_maxsz + \
 653                                 encode_putfh_maxsz + \
 654                                 encode_lookupp_maxsz + \
 655                                 encode_getattr_maxsz + \
 656                                 encode_getfh_maxsz)
 657 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 658                                 decode_sequence_maxsz + \
 659                                 decode_putfh_maxsz + \
 660                                 decode_lookupp_maxsz + \
 661                                 decode_getattr_maxsz + \
 662                                 decode_getfh_maxsz)
 663 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 664                                 encode_sequence_maxsz + \
 665                                 encode_putrootfh_maxsz + \
 666                                 encode_getattr_maxsz + \
 667                                 encode_getfh_maxsz)
 668 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 669                                 decode_sequence_maxsz + \
 670                                 decode_putrootfh_maxsz + \
 671                                 decode_getattr_maxsz + \
 672                                 decode_getfh_maxsz)
 673 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 674                                 encode_sequence_maxsz + \
 675                                 encode_putfh_maxsz + \
 676                                 encode_remove_maxsz)
 677 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 678                                 decode_sequence_maxsz + \
 679                                 decode_putfh_maxsz + \
 680                                 decode_remove_maxsz)
 681 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 682                                 encode_sequence_maxsz + \
 683                                 encode_putfh_maxsz + \
 684                                 encode_savefh_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_rename_maxsz)
 687 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 688                                 decode_sequence_maxsz + \
 689                                 decode_putfh_maxsz + \
 690                                 decode_savefh_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_rename_maxsz)
 693 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 694                                 encode_sequence_maxsz + \
 695                                 encode_putfh_maxsz + \
 696                                 encode_savefh_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_link_maxsz + \
 699                                 encode_restorefh_maxsz + \
 700                                 encode_getattr_maxsz)
 701 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_savefh_maxsz + \
 705                                 decode_putfh_maxsz + \
 706                                 decode_link_maxsz + \
 707                                 decode_restorefh_maxsz + \
 708                                 decode_getattr_maxsz)
 709 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 710                                 encode_sequence_maxsz + \
 711                                 encode_putfh_maxsz + \
 712                                 encode_symlink_maxsz + \
 713                                 encode_getattr_maxsz + \
 714                                 encode_getfh_maxsz)
 715 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 716                                 decode_sequence_maxsz + \
 717                                 decode_putfh_maxsz + \
 718                                 decode_symlink_maxsz + \
 719                                 decode_getattr_maxsz + \
 720                                 decode_getfh_maxsz)
 721 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 722                                 encode_sequence_maxsz + \
 723                                 encode_putfh_maxsz + \
 724                                 encode_create_maxsz + \
 725                                 encode_getfh_maxsz + \
 726                                 encode_getattr_maxsz)
 727 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 728                                 decode_sequence_maxsz + \
 729                                 decode_putfh_maxsz + \
 730                                 decode_create_maxsz + \
 731                                 decode_getfh_maxsz + \
 732                                 decode_getattr_maxsz)
 733 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 734                                 encode_sequence_maxsz + \
 735                                 encode_putfh_maxsz + \
 736                                 encode_getattr_maxsz)
 737 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 738                                 decode_sequence_maxsz + \
 739                                 decode_putfh_maxsz + \
 740                                 decode_getattr_maxsz)
 741 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 742                                 encode_sequence_maxsz + \
 743                                 encode_putfh_maxsz + \
 744                                 encode_statfs_maxsz)
 745 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 746                                 decode_sequence_maxsz + \
 747                                 decode_putfh_maxsz + \
 748                                 decode_statfs_maxsz)
 749 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 750                                 encode_sequence_maxsz + \
 751                                 encode_putfh_maxsz + \
 752                                 encode_getattr_maxsz)
 753 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 754                                 decode_sequence_maxsz + \
 755                                 decode_putfh_maxsz + \
 756                                 decode_getattr_maxsz)
 757 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 758                                 encode_sequence_maxsz + \
 759                                 encode_putfh_maxsz + \
 760                                 encode_layoutreturn_maxsz + \
 761                                 encode_delegreturn_maxsz + \
 762                                 encode_getattr_maxsz)
 763 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 764                                 decode_sequence_maxsz + \
 765                                 decode_putfh_maxsz + \
 766                                 decode_layoutreturn_maxsz + \
 767                                 decode_delegreturn_maxsz + \
 768                                 decode_getattr_maxsz)
 769 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 770                                 encode_sequence_maxsz + \
 771                                 encode_putfh_maxsz + \
 772                                 encode_getacl_maxsz)
 773 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 774                                 decode_sequence_maxsz + \
 775                                 decode_putfh_maxsz + \
 776                                 decode_getacl_maxsz)
 777 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 778                                 encode_sequence_maxsz + \
 779                                 encode_putfh_maxsz + \
 780                                 encode_setacl_maxsz)
 781 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 782                                 decode_sequence_maxsz + \
 783                                 decode_putfh_maxsz + \
 784                                 decode_setacl_maxsz)
 785 #define NFS4_enc_fs_locations_sz \
 786                                 (compound_encode_hdr_maxsz + \
 787                                  encode_sequence_maxsz + \
 788                                  encode_putfh_maxsz + \
 789                                  encode_lookup_maxsz + \
 790                                  encode_fs_locations_maxsz + \
 791                                  encode_renew_maxsz)
 792 #define NFS4_dec_fs_locations_sz \
 793                                 (compound_decode_hdr_maxsz + \
 794                                  decode_sequence_maxsz + \
 795                                  decode_putfh_maxsz + \
 796                                  decode_lookup_maxsz + \
 797                                  decode_fs_locations_maxsz + \
 798                                  decode_renew_maxsz)
 799 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 800                                 encode_sequence_maxsz + \
 801                                 encode_putfh_maxsz + \
 802                                 encode_secinfo_maxsz)
 803 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 804                                 decode_sequence_maxsz + \
 805                                 decode_putfh_maxsz + \
 806                                 decode_secinfo_maxsz)
 807 #define NFS4_enc_fsid_present_sz \
 808                                 (compound_encode_hdr_maxsz + \
 809                                  encode_sequence_maxsz + \
 810                                  encode_putfh_maxsz + \
 811                                  encode_getfh_maxsz + \
 812                                  encode_renew_maxsz)
 813 #define NFS4_dec_fsid_present_sz \
 814                                 (compound_decode_hdr_maxsz + \
 815                                  decode_sequence_maxsz + \
 816                                  decode_putfh_maxsz + \
 817                                  decode_getfh_maxsz + \
 818                                  decode_renew_maxsz)
 819 #if defined(CONFIG_NFS_V4_1)
 820 #define NFS4_enc_bind_conn_to_session_sz \
 821                                 (compound_encode_hdr_maxsz + \
 822                                  encode_bind_conn_to_session_maxsz)
 823 #define NFS4_dec_bind_conn_to_session_sz \
 824                                 (compound_decode_hdr_maxsz + \
 825                                  decode_bind_conn_to_session_maxsz)
 826 #define NFS4_enc_exchange_id_sz \
 827                                 (compound_encode_hdr_maxsz + \
 828                                  encode_exchange_id_maxsz)
 829 #define NFS4_dec_exchange_id_sz \
 830                                 (compound_decode_hdr_maxsz + \
 831                                  decode_exchange_id_maxsz)
 832 #define NFS4_enc_create_session_sz \
 833                                 (compound_encode_hdr_maxsz + \
 834                                  encode_create_session_maxsz)
 835 #define NFS4_dec_create_session_sz \
 836                                 (compound_decode_hdr_maxsz + \
 837                                  decode_create_session_maxsz)
 838 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 839                                          encode_destroy_session_maxsz)
 840 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 841                                          decode_destroy_session_maxsz)
 842 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 843                                          encode_destroy_clientid_maxsz)
 844 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 845                                          decode_destroy_clientid_maxsz)
 846 #define NFS4_enc_sequence_sz \
 847                                 (compound_decode_hdr_maxsz + \
 848                                  encode_sequence_maxsz)
 849 #define NFS4_dec_sequence_sz \
 850                                 (compound_decode_hdr_maxsz + \
 851                                  decode_sequence_maxsz)
 852 #endif
 853 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 854                                          encode_sequence_maxsz + \
 855                                          encode_putrootfh_maxsz + \
 856                                          encode_fsinfo_maxsz)
 857 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 858                                          decode_sequence_maxsz + \
 859                                          decode_putrootfh_maxsz + \
 860                                          decode_fsinfo_maxsz)
 861 #if defined(CONFIG_NFS_V4_1)
 862 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 863                                          encode_sequence_maxsz + \
 864                                          encode_reclaim_complete_maxsz)
 865 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 866                                          decode_sequence_maxsz + \
 867                                          decode_reclaim_complete_maxsz)
 868 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 869                                 encode_sequence_maxsz +\
 870                                 encode_getdeviceinfo_maxsz)
 871 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 872                                 decode_sequence_maxsz + \
 873                                 decode_getdeviceinfo_maxsz)
 874 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 875                                 encode_sequence_maxsz + \
 876                                 encode_putfh_maxsz +        \
 877                                 encode_layoutget_maxsz)
 878 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 879                                 decode_sequence_maxsz + \
 880                                 decode_putfh_maxsz +        \
 881                                 decode_layoutget_maxsz)
 882 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 883                                 encode_sequence_maxsz +\
 884                                 encode_putfh_maxsz + \
 885                                 encode_layoutcommit_maxsz + \
 886                                 encode_getattr_maxsz)
 887 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 888                                 decode_sequence_maxsz + \
 889                                 decode_putfh_maxsz + \
 890                                 decode_layoutcommit_maxsz + \
 891                                 decode_getattr_maxsz)
 892 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 893                                 encode_sequence_maxsz + \
 894                                 encode_putfh_maxsz + \
 895                                 encode_layoutreturn_maxsz)
 896 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 897                                 decode_sequence_maxsz + \
 898                                 decode_putfh_maxsz + \
 899                                 decode_layoutreturn_maxsz)
 900 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 901                                         encode_sequence_maxsz + \
 902                                         encode_putrootfh_maxsz +\
 903                                         encode_secinfo_no_name_maxsz)
 904 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 905                                         decode_sequence_maxsz + \
 906                                         decode_putrootfh_maxsz + \
 907                                         decode_secinfo_no_name_maxsz)
 908 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 909                                          encode_sequence_maxsz + \
 910                                          encode_test_stateid_maxsz)
 911 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 912                                          decode_sequence_maxsz + \
 913                                          decode_test_stateid_maxsz)
 914 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 915                                          encode_sequence_maxsz + \
 916                                          encode_free_stateid_maxsz)
 917 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 918                                          decode_sequence_maxsz + \
 919                                          decode_free_stateid_maxsz)
 920
 921 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 922                                       compound_encode_hdr_maxsz +
 923                                       encode_sequence_maxsz +
 924                                       encode_putfh_maxsz +
 925                                       encode_getattr_maxsz) *
 926                                      XDR_UNIT);
 927
 928 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 929                                      compound_decode_hdr_maxsz +
 930                                      decode_sequence_maxsz +
 931                                      decode_putfh_maxsz) *
 932                                     XDR_UNIT);
 933
 934 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 935                                            compound_decode_hdr_maxsz +
 936                                            decode_sequence_maxsz) *
 937                                           XDR_UNIT);
 938 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 939 #endif /* CONFIG_NFS_V4_1 */
 940
 941 static const umode_t nfs_type2fmt[] = {
 942         [NF4BAD] = 0,
 943         [NF4REG] = S_IFREG,
 944         [NF4DIR] = S_IFDIR,
 945         [NF4BLK] = S_IFBLK,
 946         [NF4CHR] = S_IFCHR,
 947         [NF4LNK] = S_IFLNK,
 948         [NF4SOCK] = S_IFSOCK,
 949         [NF4FIFO] = S_IFIFO,
 950         [NF4ATTRDIR] = 0,
 951         [NF4NAMEDATTR] = 0,
 952 };
 953
 954 struct compound_hdr {
 955         int32_t         status;
 956         uint32_t        nops;
 957         __be32 *        nops_p;
 958         uint32_t        taglen;
 959         char *          tag;
 960         uint32_t        replen;         /* expected reply words */
 961         u32             minorversion;
 962 };
 963
 964 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 965 {
 966         __be32 *p = xdr_reserve_space(xdr, nbytes);
 967         BUG_ON(!p);
 968         return p;
 969 }
 970
 971 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 972 {
 973         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 974 }
 975
 976 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 977 {
 978         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 979 }
 980
 981 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 982 {
 983         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 984 }
 985
 986 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 987 {
 988         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 989 }
 990
 991 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 992                 const __u32 *bitmap, size_t len)
 993 {
 994         ssize_t ret;
 995
 996         /* Trim empty words */
 997         while (len > 0 && bitmap[len-1] == 0)
 998                 len--;
 999         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
1000         if (WARN_ON_ONCE(ret < 0))
1001                 return ret;
1002         return len;
1003 }
1004
1005 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
1006                 __u32 *res, size_t len)
1007 {
1008         size_t i;
1009         __u32 tmp;
1010
1011         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1012                 len--;
1013         for (i = len; i-- > 0;) {
1014                 tmp = bitmap[i] & mask[i];
1015                 res[i] = tmp;
1016         }
1017         return len;
1018 }
1019
1020 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1021                 const struct nfs_seqid *seqid)
1022 {
1023         if (seqid != NULL)
1024                 encode_uint32(xdr, seqid->sequence->counter);
1025         else
1026                 encode_uint32(xdr, 0);
1027 }
1028
1029 static void encode_compound_hdr(struct xdr_stream *xdr,
1030                                 struct rpc_rqst *req,
1031                                 struct compound_hdr *hdr)
1032 {
1033         __be32 *p;
1034
1035         /* initialize running count of expected bytes in reply.
1036          * NOTE: the replied tag SHOULD be the same is the one sent,
1037          * but this is not required as a MUST for the server to do so. */
1038         hdr->replen = 3 + hdr->taglen;
1039
1040         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1041         encode_string(xdr, hdr->taglen, hdr->tag);
1042         p = reserve_space(xdr, 8);
1043         *p++ = cpu_to_be32(hdr->minorversion);
1044         hdr->nops_p = p;
1045         *p = cpu_to_be32(hdr->nops);
1046 }
1047
1048 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1049                 uint32_t replen,
1050                 struct compound_hdr *hdr)
1051 {
1052         encode_uint32(xdr, op);
1053         hdr->nops++;
1054         hdr->replen += replen;
1055 }
1056
1057 static void encode_nops(struct compound_hdr *hdr)
1058 {
1059         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1060         *hdr->nops_p = htonl(hdr->nops);
1061 }
1062
1063 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1064 {
1065         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1066 }
1067
1068 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1069 {
1070         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1071 }
1072
1073 static __be32 *
1074 xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1075 {
1076         p = xdr_encode_hyper(p, t->tv_sec);
1077         *p++ = cpu_to_be32(t->tv_nsec);
1078         return p;
1079 }
1080
1081 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1082                                 const struct nfs4_label *label,
1083                                 const umode_t *umask,
1084                                 const struct nfs_server *server,
1085                                 const uint32_t attrmask[])
1086 {
1087         char owner_name[IDMAP_NAMESZ];
1088         char owner_group[IDMAP_NAMESZ];
1089         int owner_namelen = 0;
1090         int owner_grouplen = 0;
1091         __be32 *p;
1092         uint32_t len = 0;
1093         uint32_t bmval[3] = { 0 };
1094
1095         /*
1096          * We reserve enough space to write the entire attribute buffer at once.
1097          */
1098         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1099                 bmval[0] |= FATTR4_WORD0_SIZE;
1100                 len += 8;
1101         }
1102         if (iap->ia_valid & ATTR_MODE) {
1103                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1104                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1105                         len += 8;
1106                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1107                         bmval[1] |= FATTR4_WORD1_MODE;
1108                         len += 4;
1109                 }
1110         }
1111         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1112                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1113                 if (owner_namelen < 0) {
1114                         dprintk("nfs: couldn't resolve uid %d to string\n",
1115                                         from_kuid(&init_user_ns, iap->ia_uid));
1116                         /* XXX */
1117                         strcpy(owner_name, "nobody");
1118                         owner_namelen = sizeof("nobody") - 1;
1119                         /* goto out; */
1120                 }
1121                 bmval[1] |= FATTR4_WORD1_OWNER;
1122                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1123         }
1124         if ((iap->ia_valid & ATTR_GID) &&
1125            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1126                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1127                 if (owner_grouplen < 0) {
1128                         dprintk("nfs: couldn't resolve gid %d to string\n",
1129                                         from_kgid(&init_user_ns, iap->ia_gid));
1130                         strcpy(owner_group, "nobody");
1131                         owner_grouplen = sizeof("nobody") - 1;
1132                         /* goto out; */
1133                 }
1134                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1135                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1136         }
1137         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1138                 if (iap->ia_valid & ATTR_ATIME_SET) {
1139                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1140                         len += 4 + (nfstime4_maxsz << 2);
1141                 } else if (iap->ia_valid & ATTR_ATIME) {
1142                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1143                         len += 4;
1144                 }
1145         }
1146         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1147                 if (iap->ia_valid & ATTR_MTIME_SET) {
1148                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1149                         len += 4 + (nfstime4_maxsz << 2);
1150                 } else if (iap->ia_valid & ATTR_MTIME) {
1151                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1152                         len += 4;
1153                 }
1154         }
1155
1156         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1157                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1158                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1159         }
1160
1161         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1162         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1163
1164         if (bmval[0] & FATTR4_WORD0_SIZE)
1165                 p = xdr_encode_hyper(p, iap->ia_size);
1166         if (bmval[1] & FATTR4_WORD1_MODE)
1167                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1168         if (bmval[1] & FATTR4_WORD1_OWNER)
1169                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1170         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1171                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1172         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1173                 if (iap->ia_valid & ATTR_ATIME_SET) {
1174                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1175                         p = xdr_encode_nfstime4(p, &iap->ia_atime);
1176                 } else
1177                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1178         }
1179         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1180                 if (iap->ia_valid & ATTR_MTIME_SET) {
1181                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1182                         p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1183                 } else
1184                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1185         }
1186         if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1187                 *p++ = cpu_to_be32(label->lfs);
1188                 *p++ = cpu_to_be32(label->pi);
1189                 *p++ = cpu_to_be32(label->len);
1190                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1191         }
1192         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1193                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1194                 *p++ = cpu_to_be32(*umask);
1195         }
1196
1197 /* out: */
1198 }
1199
1200 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1201 {
1202         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1203         encode_uint32(xdr, access);
1204 }
1205
1206 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1207 {
1208         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1209         encode_nfs4_seqid(xdr, arg->seqid);
1210         encode_nfs4_stateid(xdr, &arg->stateid);
1211 }
1212
1213 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216
1217         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1218         p = reserve_space(xdr, 12);
1219         p = xdr_encode_hyper(p, args->offset);
1220         *p = cpu_to_be32(args->count);
1221 }
1222
1223 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1224 {
1225         __be32 *p;
1226
1227         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1228         encode_uint32(xdr, create->ftype);
1229
1230         switch (create->ftype) {
1231         case NF4LNK:
1232                 p = reserve_space(xdr, 4);
1233                 *p = cpu_to_be32(create->u.symlink.len);
1234                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1235                                 create->u.symlink.len);
1236                 xdr->buf->flags |= XDRBUF_WRITE;
1237                 break;
1238
1239         case NF4BLK: case NF4CHR:
1240                 p = reserve_space(xdr, 8);
1241                 *p++ = cpu_to_be32(create->u.device.specdata1);
1242                 *p = cpu_to_be32(create->u.device.specdata2);
1243                 break;
1244
1245         default:
1246                 break;
1247         }
1248
1249         encode_string(xdr, create->name->len, create->name->name);
1250         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1251                         create->server, create->server->attr_bitmask);
1252 }
1253
1254 static void encode_getattr(struct xdr_stream *xdr,
1255                 const __u32 *bitmap, const __u32 *mask, size_t len,
1256                 struct compound_hdr *hdr)
1257 {
1258         __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1259
1260         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1261         if (mask) {
1262                 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1263                         len = ARRAY_SIZE(masked_bitmap);
1264                 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1265                 bitmap = masked_bitmap;
1266         }
1267         xdr_encode_bitmap4(xdr, bitmap, len);
1268 }
1269
1270 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1271 {
1272         encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1273                         ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1274 }
1275
1276 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1277                                  const u32 *open_bitmap,
1278                                  struct compound_hdr *hdr)
1279 {
1280         encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1281 }
1282
1283 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1284 {
1285         encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1286                         ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1287 }
1288
1289 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1290 {
1291         encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1292                         ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1293 }
1294
1295 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1296 {
1297         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1298 }
1299
1300 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1301 {
1302         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1303         encode_string(xdr, name->len, name->name);
1304 }
1305
1306 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1307 {
1308         if (fl->fl_type == F_RDLCK)
1309                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1310         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1311 }
1312
1313 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1314 {
1315         if (fl->fl_end == OFFSET_MAX)
1316                 return ~(uint64_t)0;
1317         return fl->fl_end - fl->fl_start + 1;
1318 }
1319
1320 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1321 {
1322         __be32 *p;
1323
1324         p = reserve_space(xdr, 32);
1325         p = xdr_encode_hyper(p, lowner->clientid);
1326         *p++ = cpu_to_be32(20);
1327         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1328         *p++ = cpu_to_be32(lowner->s_dev);
1329         xdr_encode_hyper(p, lowner->id);
1330 }
1331
1332 /*
1333  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1334  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1335  */
1336 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1337 {
1338         __be32 *p;
1339
1340         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1341         p = reserve_space(xdr, 28);
1342         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1343         *p++ = cpu_to_be32(args->reclaim);
1344         p = xdr_encode_hyper(p, args->fl->fl_start);
1345         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1346         *p = cpu_to_be32(args->new_lock_owner);
1347         if (args->new_lock_owner){
1348                 encode_nfs4_seqid(xdr, args->open_seqid);
1349                 encode_nfs4_stateid(xdr, &args->open_stateid);
1350                 encode_nfs4_seqid(xdr, args->lock_seqid);
1351                 encode_lockowner(xdr, &args->lock_owner);
1352         }
1353         else {
1354                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1355                 encode_nfs4_seqid(xdr, args->lock_seqid);
1356         }
1357 }
1358
1359 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1360 {
1361         __be32 *p;
1362
1363         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1364         p = reserve_space(xdr, 20);
1365         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1366         p = xdr_encode_hyper(p, args->fl->fl_start);
1367         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1368         encode_lockowner(xdr, &args->lock_owner);
1369 }
1370
1371 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1372 {
1373         __be32 *p;
1374
1375         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1376         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1377         encode_nfs4_seqid(xdr, args->seqid);
1378         encode_nfs4_stateid(xdr, &args->stateid);
1379         p = reserve_space(xdr, 16);
1380         p = xdr_encode_hyper(p, args->fl->fl_start);
1381         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1382 }
1383
1384 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1385 {
1386         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1387         encode_lockowner(xdr, lowner);
1388 }
1389
1390 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1391 {
1392         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1393         encode_string(xdr, name->len, name->name);
1394 }
1395
1396 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1397 {
1398         encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1399 }
1400
1401 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1402 {
1403         __be32 *p;
1404
1405         p = reserve_space(xdr, 8);
1406         *p++ = cpu_to_be32(share_access);
1407         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1408 }
1409
1410 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1411 {
1412         __be32 *p;
1413  /*
1414  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1415  * owner 4 = 32
1416  */
1417         encode_nfs4_seqid(xdr, arg->seqid);
1418         encode_share_access(xdr, arg->share_access);
1419         p = reserve_space(xdr, 36);
1420         p = xdr_encode_hyper(p, arg->clientid);
1421         *p++ = cpu_to_be32(24);
1422         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1423         *p++ = cpu_to_be32(arg->server->s_dev);
1424         *p++ = cpu_to_be32(arg->id.uniquifier);
1425         xdr_encode_hyper(p, arg->id.create_time);
1426 }
1427
1428 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1429 {
1430         __be32 *p;
1431
1432         p = reserve_space(xdr, 4);
1433         switch(arg->createmode) {
1434         case NFS4_CREATE_UNCHECKED:
1435                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1436                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1437                                 arg->server, arg->server->attr_bitmask);
1438                 break;
1439         case NFS4_CREATE_GUARDED:
1440                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1441                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1442                                 arg->server, arg->server->attr_bitmask);
1443                 break;
1444         case NFS4_CREATE_EXCLUSIVE:
1445                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1446                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1447                 break;
1448         case NFS4_CREATE_EXCLUSIVE4_1:
1449                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1450                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1451                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1452                                 arg->server, arg->server->exclcreat_bitmask);
1453         }
1454 }
1455
1456 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1457 {
1458         __be32 *p;
1459
1460         p = reserve_space(xdr, 4);
1461         switch (arg->open_flags & O_CREAT) {
1462         case 0:
1463                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1464                 break;
1465         default:
1466                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1467                 encode_createmode(xdr, arg);
1468         }
1469 }
1470
1471 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1472 {
1473         __be32 *p;
1474
1475         p = reserve_space(xdr, 4);
1476         switch (delegation_type) {
1477         case 0:
1478                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1479                 break;
1480         case FMODE_READ:
1481                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1482                 break;
1483         case FMODE_WRITE|FMODE_READ:
1484                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1485                 break;
1486         default:
1487                 BUG();
1488         }
1489 }
1490
1491 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1492 {
1493         __be32 *p;
1494
1495         p = reserve_space(xdr, 4);
1496         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1497         encode_string(xdr, name->len, name->name);
1498 }
1499
1500 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1501 {
1502         __be32 *p;
1503
1504         p = reserve_space(xdr, 4);
1505         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1506         encode_delegation_type(xdr, type);
1507 }
1508
1509 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1510 {
1511         __be32 *p;
1512
1513         p = reserve_space(xdr, 4);
1514         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1515         encode_nfs4_stateid(xdr, stateid);
1516         encode_string(xdr, name->len, name->name);
1517 }
1518
1519 static inline void encode_claim_fh(struct xdr_stream *xdr)
1520 {
1521         __be32 *p;
1522
1523         p = reserve_space(xdr, 4);
1524         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1525 }
1526
1527 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1528 {
1529         __be32 *p;
1530
1531         p = reserve_space(xdr, 4);
1532         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1533         encode_nfs4_stateid(xdr, stateid);
1534 }
1535
1536 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1537 {
1538         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1539         encode_openhdr(xdr, arg);
1540         encode_opentype(xdr, arg);
1541         switch (arg->claim) {
1542         case NFS4_OPEN_CLAIM_NULL:
1543                 encode_claim_null(xdr, arg->name);
1544                 break;
1545         case NFS4_OPEN_CLAIM_PREVIOUS:
1546                 encode_claim_previous(xdr, arg->u.delegation_type);
1547                 break;
1548         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1549                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1550                 break;
1551         case NFS4_OPEN_CLAIM_FH:
1552                 encode_claim_fh(xdr);
1553                 break;
1554         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1555                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1556                 break;
1557         default:
1558                 BUG();
1559         }
1560 }
1561
1562 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1563 {
1564         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1565         encode_nfs4_stateid(xdr, arg->stateid);
1566         encode_nfs4_seqid(xdr, arg->seqid);
1567 }
1568
1569 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1570 {
1571         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1572         encode_nfs4_stateid(xdr, &arg->stateid);
1573         encode_nfs4_seqid(xdr, arg->seqid);
1574         encode_share_access(xdr, arg->share_access);
1575 }
1576
1577 static void
1578 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1579 {
1580         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1581         encode_string(xdr, fh->size, fh->data);
1582 }
1583
1584 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1585 {
1586         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1587 }
1588
1589 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1590                         struct compound_hdr *hdr)
1591 {
1592         __be32 *p;
1593
1594         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1595         encode_nfs4_stateid(xdr, &args->stateid);
1596
1597         p = reserve_space(xdr, 12);
1598         p = xdr_encode_hyper(p, args->offset);
1599         *p = cpu_to_be32(args->count);
1600 }
1601
1602 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1603 {
1604         uint32_t attrs[3] = {
1605                 FATTR4_WORD0_RDATTR_ERROR,
1606                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1607         };
1608         uint32_t dircount = readdir->count;
1609         uint32_t maxcount = readdir->count;
1610         __be32 *p, verf[2];
1611         uint32_t attrlen = 0;
1612         unsigned int i;
1613
1614         if (readdir->plus) {
1615                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1616                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1617                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1618                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1619                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1620                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1621                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1622         }
1623         /* Use mounted_on_fileid only if the server supports it */
1624         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1625                 attrs[0] |= FATTR4_WORD0_FILEID;
1626         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1627                 attrs[i] &= readdir->bitmask[i];
1628                 if (attrs[i] != 0)
1629                         attrlen = i+1;
1630         }
1631
1632         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1633         encode_uint64(xdr, readdir->cookie);
1634         encode_nfs4_verifier(xdr, &readdir->verifier);
1635         p = reserve_space(xdr, 12 + (attrlen << 2));
1636         *p++ = cpu_to_be32(dircount);
1637         *p++ = cpu_to_be32(maxcount);
1638         *p++ = cpu_to_be32(attrlen);
1639         for (i = 0; i < attrlen; i++)
1640                 *p++ = cpu_to_be32(attrs[i]);
1641         memcpy(verf, readdir->verifier.data, sizeof(verf));
1642
1643         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1644                         __func__,
1645                         (unsigned long long)readdir->cookie,
1646                         verf[0], verf[1],
1647                         attrs[0] & readdir->bitmask[0],
1648                         attrs[1] & readdir->bitmask[1],
1649                         attrs[2] & readdir->bitmask[2]);
1650 }
1651
1652 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1653 {
1654         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1655 }
1656
1657 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1658 {
1659         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1660         encode_string(xdr, name->len, name->name);
1661 }
1662
1663 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1664 {
1665         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1666         encode_string(xdr, oldname->len, oldname->name);
1667         encode_string(xdr, newname->len, newname->name);
1668 }
1669
1670 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1671                          struct compound_hdr *hdr)
1672 {
1673         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1674         encode_uint64(xdr, clid);
1675 }
1676
1677 static void
1678 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1679 {
1680         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1681 }
1682
1683 static void nfs4_acltype_to_bitmap(enum nfs4_acl_type type, __u32 bitmap[2])
1684 {
1685         switch (type) {
1686         default:
1687                 bitmap[0] = FATTR4_WORD0_ACL;
1688                 bitmap[1] = 0;
1689                 break;
1690         case NFS4ACL_DACL:
1691                 bitmap[0] = 0;
1692                 bitmap[1] = FATTR4_WORD1_DACL;
1693                 break;
1694         case NFS4ACL_SACL:
1695                 bitmap[0] = 0;
1696                 bitmap[1] = FATTR4_WORD1_SACL;
1697         }
1698 }
1699
1700 static void encode_setacl(struct xdr_stream *xdr,
1701                           const struct nfs_setaclargs *arg,
1702                           struct compound_hdr *hdr)
1703 {
1704         __u32 bitmap[2];
1705
1706         nfs4_acltype_to_bitmap(arg->acl_type, bitmap);
1707
1708         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1709         encode_nfs4_stateid(xdr, &zero_stateid);
1710         xdr_encode_bitmap4(xdr, bitmap, ARRAY_SIZE(bitmap));
1711         encode_uint32(xdr, arg->acl_len);
1712         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1713 }
1714
1715 static void
1716 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1717 {
1718         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1719 }
1720
1721 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1722 {
1723         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1724         encode_nfs4_stateid(xdr, &arg->stateid);
1725         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1726                         server->attr_bitmask);
1727 }
1728
1729 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1730 {
1731         __be32 *p;
1732
1733         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1734         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1735
1736         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1737                         setclientid->sc_clnt->cl_owner_id);
1738         p = reserve_space(xdr, 4);
1739         *p = cpu_to_be32(setclientid->sc_prog);
1740         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1741         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1742         p = reserve_space(xdr, 4);
1743         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1744 }
1745
1746 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1747 {
1748         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1749                         decode_setclientid_confirm_maxsz, hdr);
1750         encode_uint64(xdr, arg->clientid);
1751         encode_nfs4_verifier(xdr, &arg->confirm);
1752 }
1753
1754 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1755                          struct compound_hdr *hdr)
1756 {
1757         __be32 *p;
1758
1759         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1760         encode_nfs4_stateid(xdr, &args->stateid);
1761
1762         p = reserve_space(xdr, 16);
1763         p = xdr_encode_hyper(p, args->offset);
1764         *p++ = cpu_to_be32(args->stable);
1765         *p = cpu_to_be32(args->count);
1766
1767         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1768 }
1769
1770 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1771 {
1772         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1773         encode_nfs4_stateid(xdr, stateid);
1774 }
1775
1776 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1777 {
1778         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1779         encode_string(xdr, name->len, name->name);
1780 }
1781
1782 #if defined(CONFIG_NFS_V4_1)
1783 /* NFSv4.1 operations */
1784 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1785                                    const struct nfs41_bind_conn_to_session_args *args,
1786                                    struct compound_hdr *hdr)
1787 {
1788         __be32 *p;
1789
1790         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1791                 decode_bind_conn_to_session_maxsz, hdr);
1792         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1793         p = xdr_reserve_space(xdr, 8);
1794         *p++ = cpu_to_be32(args->dir);
1795         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1796 }
1797
1798 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1799 {
1800         unsigned int i;
1801         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1802         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1803                 encode_uint32(xdr, op_map->u.words[i]);
1804 }
1805
1806 static void encode_exchange_id(struct xdr_stream *xdr,
1807                                const struct nfs41_exchange_id_args *args,
1808                                struct compound_hdr *hdr)
1809 {
1810         __be32 *p;
1811         char impl_name[IMPL_NAME_LIMIT];
1812         int len = 0;
1813
1814         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1815         encode_nfs4_verifier(xdr, &args->verifier);
1816
1817         encode_string(xdr, strlen(args->client->cl_owner_id),
1818                         args->client->cl_owner_id);
1819
1820         encode_uint32(xdr, args->flags);
1821         encode_uint32(xdr, args->state_protect.how);
1822
1823         switch (args->state_protect.how) {
1824         case SP4_NONE:
1825                 break;
1826         case SP4_MACH_CRED:
1827                 encode_op_map(xdr, &args->state_protect.enforce);
1828                 encode_op_map(xdr, &args->state_protect.allow);
1829                 break;
1830         default:
1831                 WARN_ON_ONCE(1);
1832                 break;
1833         }
1834
1835         if (send_implementation_id &&
1836             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1837             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1838                 <= sizeof(impl_name) + 1)
1839                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1840                                utsname()->sysname, utsname()->release,
1841                                utsname()->version, utsname()->machine);
1842
1843         if (len > 0) {
1844                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1845
1846                 encode_string(xdr,
1847                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1848                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1849                 encode_string(xdr, len, impl_name);
1850                 /* just send zeros for nii_date - the date is in nii_name */
1851                 p = reserve_space(xdr, 12);
1852                 p = xdr_encode_hyper(p, 0);
1853                 *p = cpu_to_be32(0);
1854         } else
1855                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1856 }
1857
1858 static void encode_create_session(struct xdr_stream *xdr,
1859                                   const struct nfs41_create_session_args *args,
1860                                   struct compound_hdr *hdr)
1861 {
1862         __be32 *p;
1863         struct nfs_client *clp = args->client;
1864         struct rpc_clnt *clnt = clp->cl_rpcclient;
1865         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1866         u32 max_resp_sz_cached;
1867
1868         /*
1869          * Assumes OPEN is the biggest non-idempotent compound.
1870          * 2 is the verifier.
1871          */
1872         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1873                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1874
1875         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1876         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1877         p = xdr_encode_hyper(p, args->clientid);
1878         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1879         *p++ = cpu_to_be32(args->flags);                        /*flags */
1880
1881         /* Fore Channel */
1882         *p++ = cpu_to_be32(0);                          /* header padding size */
1883         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1884         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1885         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1886         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1887         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1888         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1889
1890         /* Back Channel */
1891         *p++ = cpu_to_be32(0);                          /* header padding size */
1892         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1893         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1894         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1895         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1896         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1897         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1898
1899         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1900         *p++ = cpu_to_be32(1);
1901         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1902
1903         /* authsys_parms rfc1831 */
1904         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1905         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1906         *p++ = cpu_to_be32(0);                          /* UID */
1907         *p++ = cpu_to_be32(0);                          /* GID */
1908         *p = cpu_to_be32(0);                            /* No more gids */
1909 }
1910
1911 static void encode_destroy_session(struct xdr_stream *xdr,
1912                                    const struct nfs4_session *session,
1913                                    struct compound_hdr *hdr)
1914 {
1915         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1916         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1917 }
1918
1919 static void encode_destroy_clientid(struct xdr_stream *xdr,
1920                                    uint64_t clientid,
1921                                    struct compound_hdr *hdr)
1922 {
1923         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1924         encode_uint64(xdr, clientid);
1925 }
1926
1927 static void encode_reclaim_complete(struct xdr_stream *xdr,
1928                                     const struct nfs41_reclaim_complete_args *args,
1929                                     struct compound_hdr *hdr)
1930 {
1931         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1932         encode_uint32(xdr, args->one_fs);
1933 }
1934 #endif /* CONFIG_NFS_V4_1 */
1935
1936 static void encode_sequence(struct xdr_stream *xdr,
1937                             const struct nfs4_sequence_args *args,
1938                             struct compound_hdr *hdr)
1939 {
1940 #if defined(CONFIG_NFS_V4_1)
1941         struct nfs4_session *session;
1942         struct nfs4_slot_table *tp;
1943         struct nfs4_slot *slot = args->sa_slot;
1944         __be32 *p;
1945
1946         tp = slot->table;
1947         session = tp->session;
1948         if (!session)
1949                 return;
1950
1951         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1952
1953         /*
1954          * Sessionid + seqid + slotid + max slotid + cache_this
1955          */
1956         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1957                 "max_slotid=%d cache_this=%d\n",
1958                 __func__,
1959                 ((u32 *)session->sess_id.data)[0],
1960                 ((u32 *)session->sess_id.data)[1],
1961                 ((u32 *)session->sess_id.data)[2],
1962                 ((u32 *)session->sess_id.data)[3],
1963                 slot->seq_nr, slot->slot_nr,
1964                 tp->highest_used_slotid, args->sa_cache_this);
1965         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1966         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1967         *p++ = cpu_to_be32(slot->seq_nr);
1968         *p++ = cpu_to_be32(slot->slot_nr);
1969         *p++ = cpu_to_be32(tp->highest_used_slotid);
1970         *p = cpu_to_be32(args->sa_cache_this);
1971 #endif /* CONFIG_NFS_V4_1 */
1972 }
1973
1974 #ifdef CONFIG_NFS_V4_1
1975 static void
1976 encode_getdeviceinfo(struct xdr_stream *xdr,
1977                      const struct nfs4_getdeviceinfo_args *args,
1978                      struct compound_hdr *hdr)
1979 {
1980         __be32 *p;
1981
1982         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1983         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1984         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1985                                     NFS4_DEVICEID4_SIZE);
1986         *p++ = cpu_to_be32(args->pdev->layout_type);
1987         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1988
1989         p = reserve_space(xdr, 4 + 4);
1990         *p++ = cpu_to_be32(1);                  /* bitmap length */
1991         *p++ = cpu_to_be32(args->notify_types);
1992 }
1993
1994 static void
1995 encode_layoutget(struct xdr_stream *xdr,
1996                       const struct nfs4_layoutget_args *args,
1997                       struct compound_hdr *hdr)
1998 {
1999         __be32 *p;
2000
2001         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
2002         p = reserve_space(xdr, 36);
2003         *p++ = cpu_to_be32(0);     /* Signal layout available */
2004         *p++ = cpu_to_be32(args->type);
2005         *p++ = cpu_to_be32(args->range.iomode);
2006         p = xdr_encode_hyper(p, args->range.offset);
2007         p = xdr_encode_hyper(p, args->range.length);
2008         p = xdr_encode_hyper(p, args->minlength);
2009         encode_nfs4_stateid(xdr, &args->stateid);
2010         encode_uint32(xdr, args->maxcount);
2011
2012         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
2013                 __func__,
2014                 args->type,
2015                 args->range.iomode,
2016                 (unsigned long)args->range.offset,
2017                 (unsigned long)args->range.length,
2018                 args->maxcount);
2019 }
2020
2021 static int
2022 encode_layoutcommit(struct xdr_stream *xdr,
2023                     struct inode *inode,
2024                     const struct nfs4_layoutcommit_args *args,
2025                     struct compound_hdr *hdr)
2026 {
2027         __be32 *p;
2028
2029         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2030                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2031
2032         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2033         p = reserve_space(xdr, 20);
2034         /* Only whole file layouts */
2035         p = xdr_encode_hyper(p, 0); /* offset */
2036         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2037         *p = cpu_to_be32(0); /* reclaim */
2038         encode_nfs4_stateid(xdr, &args->stateid);
2039         if (args->lastbytewritten != U64_MAX) {
2040                 p = reserve_space(xdr, 20);
2041                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2042                 p = xdr_encode_hyper(p, args->lastbytewritten);
2043         } else {
2044                 p = reserve_space(xdr, 12);
2045                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2046         }
2047         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2048         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2049
2050         encode_uint32(xdr, args->layoutupdate_len);
2051         if (args->layoutupdate_pages)
2052                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2053                                 args->layoutupdate_len);
2054
2055         return 0;
2056 }
2057
2058 static void
2059 encode_layoutreturn(struct xdr_stream *xdr,
2060                     const struct nfs4_layoutreturn_args *args,
2061                     struct compound_hdr *hdr)
2062 {
2063         __be32 *p;
2064
2065         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2066         p = reserve_space(xdr, 16);
2067         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2068         *p++ = cpu_to_be32(args->layout_type);
2069         *p++ = cpu_to_be32(args->range.iomode);
2070         *p = cpu_to_be32(RETURN_FILE);
2071         p = reserve_space(xdr, 16);
2072         p = xdr_encode_hyper(p, args->range.offset);
2073         p = xdr_encode_hyper(p, args->range.length);
2074         spin_lock(&args->inode->i_lock);
2075         encode_nfs4_stateid(xdr, &args->stateid);
2076         spin_unlock(&args->inode->i_lock);
2077         if (args->ld_private->ops && args->ld_private->ops->encode)
2078                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2079         else
2080                 encode_uint32(xdr, 0);
2081 }
2082
2083 static int
2084 encode_secinfo_no_name(struct xdr_stream *xdr,
2085                        const struct nfs41_secinfo_no_name_args *args,
2086                        struct compound_hdr *hdr)
2087 {
2088         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2089         encode_uint32(xdr, args->style);
2090         return 0;
2091 }
2092
2093 static void encode_test_stateid(struct xdr_stream *xdr,
2094                                 const struct nfs41_test_stateid_args *args,
2095                                 struct compound_hdr *hdr)
2096 {
2097         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2098         encode_uint32(xdr, 1);
2099         encode_nfs4_stateid(xdr, args->stateid);
2100 }
2101
2102 static void encode_free_stateid(struct xdr_stream *xdr,
2103                                 const struct nfs41_free_stateid_args *args,
2104                                 struct compound_hdr *hdr)
2105 {
2106         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2107         encode_nfs4_stateid(xdr, &args->stateid);
2108 }
2109 #else
2110 static inline void
2111 encode_layoutreturn(struct xdr_stream *xdr,
2112                     const struct nfs4_layoutreturn_args *args,
2113                     struct compound_hdr *hdr)
2114 {
2115 }
2116
2117 static void
2118 encode_layoutget(struct xdr_stream *xdr,
2119                       const struct nfs4_layoutget_args *args,
2120                       struct compound_hdr *hdr)
2121 {
2122 }
2123 #endif /* CONFIG_NFS_V4_1 */
2124
2125 /*
2126  * END OF "GENERIC" ENCODE ROUTINES.
2127  */
2128
2129 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2130 {
2131 #if defined(CONFIG_NFS_V4_1)
2132         struct nfs4_session *session = args->sa_slot->table->session;
2133         if (session)
2134                 return session->clp->cl_mvops->minor_version;
2135 #endif /* CONFIG_NFS_V4_1 */
2136         return 0;
2137 }
2138
2139 /*
2140  * Encode an ACCESS request
2141  */
2142 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2143                                 const void *data)
2144 {
2145         const struct nfs4_accessargs *args = data;
2146         struct compound_hdr hdr = {
2147                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2148         };
2149
2150         encode_compound_hdr(xdr, req, &hdr);
2151         encode_sequence(xdr, &args->seq_args, &hdr);
2152         encode_putfh(xdr, args->fh, &hdr);
2153         encode_access(xdr, args->access, &hdr);
2154         if (args->bitmask)
2155                 encode_getfattr(xdr, args->bitmask, &hdr);
2156         encode_nops(&hdr);
2157 }
2158
2159 /*
2160  * Encode LOOKUP request
2161  */
2162 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2163                                 const void *data)
2164 {
2165         const struct nfs4_lookup_arg *args = data;
2166         struct compound_hdr hdr = {
2167                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2168         };
2169
2170         encode_compound_hdr(xdr, req, &hdr);
2171         encode_sequence(xdr, &args->seq_args, &hdr);
2172         encode_putfh(xdr, args->dir_fh, &hdr);
2173         encode_lookup(xdr, args->name, &hdr);
2174         encode_getfh(xdr, &hdr);
2175         encode_getfattr(xdr, args->bitmask, &hdr);
2176         encode_nops(&hdr);
2177 }
2178
2179 /*
2180  * Encode LOOKUPP request
2181  */
2182 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2183                 const void *data)
2184 {
2185         const struct nfs4_lookupp_arg *args = data;
2186         struct compound_hdr hdr = {
2187                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2188         };
2189
2190         encode_compound_hdr(xdr, req, &hdr);
2191         encode_sequence(xdr, &args->seq_args, &hdr);
2192         encode_putfh(xdr, args->fh, &hdr);
2193         encode_lookupp(xdr, &hdr);
2194         encode_getfh(xdr, &hdr);
2195         encode_getfattr(xdr, args->bitmask, &hdr);
2196         encode_nops(&hdr);
2197 }
2198
2199 /*
2200  * Encode LOOKUP_ROOT request
2201  */
2202 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2203                                      struct xdr_stream *xdr,
2204                                      const void *data)
2205 {
2206         const struct nfs4_lookup_root_arg *args = data;
2207         struct compound_hdr hdr = {
2208                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209         };
2210
2211         encode_compound_hdr(xdr, req, &hdr);
2212         encode_sequence(xdr, &args->seq_args, &hdr);
2213         encode_putrootfh(xdr, &hdr);
2214         encode_getfh(xdr, &hdr);
2215         encode_getfattr(xdr, args->bitmask, &hdr);
2216         encode_nops(&hdr);
2217 }
2218
2219 /*
2220  * Encode REMOVE request
2221  */
2222 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2223                                 const void *data)
2224 {
2225         const struct nfs_removeargs *args = data;
2226         struct compound_hdr hdr = {
2227                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2228         };
2229
2230         encode_compound_hdr(xdr, req, &hdr);
2231         encode_sequence(xdr, &args->seq_args, &hdr);
2232         encode_putfh(xdr, args->fh, &hdr);
2233         encode_remove(xdr, &args->name, &hdr);
2234         encode_nops(&hdr);
2235 }
2236
2237 /*
2238  * Encode RENAME request
2239  */
2240 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2241                                 const void *data)
2242 {
2243         const struct nfs_renameargs *args = data;
2244         struct compound_hdr hdr = {
2245                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2246         };
2247
2248         encode_compound_hdr(xdr, req, &hdr);
2249         encode_sequence(xdr, &args->seq_args, &hdr);
2250         encode_putfh(xdr, args->old_dir, &hdr);
2251         encode_savefh(xdr, &hdr);
2252         encode_putfh(xdr, args->new_dir, &hdr);
2253         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2254         encode_nops(&hdr);
2255 }
2256
2257 /*
2258  * Encode LINK request
2259  */
2260 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2261                               const void *data)
2262 {
2263         const struct nfs4_link_arg *args = data;
2264         struct compound_hdr hdr = {
2265                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2266         };
2267
2268         encode_compound_hdr(xdr, req, &hdr);
2269         encode_sequence(xdr, &args->seq_args, &hdr);
2270         encode_putfh(xdr, args->fh, &hdr);
2271         encode_savefh(xdr, &hdr);
2272         encode_putfh(xdr, args->dir_fh, &hdr);
2273         encode_link(xdr, args->name, &hdr);
2274         encode_restorefh(xdr, &hdr);
2275         encode_getfattr(xdr, args->bitmask, &hdr);
2276         encode_nops(&hdr);
2277 }
2278
2279 /*
2280  * Encode CREATE request
2281  */
2282 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2283                                 const void *data)
2284 {
2285         const struct nfs4_create_arg *args = data;
2286         struct compound_hdr hdr = {
2287                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2288         };
2289
2290         encode_compound_hdr(xdr, req, &hdr);
2291         encode_sequence(xdr, &args->seq_args, &hdr);
2292         encode_putfh(xdr, args->dir_fh, &hdr);
2293         encode_create(xdr, args, &hdr);
2294         encode_getfh(xdr, &hdr);
2295         encode_getfattr(xdr, args->bitmask, &hdr);
2296         encode_nops(&hdr);
2297 }
2298
2299 /*
2300  * Encode SYMLINK request
2301  */
2302 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2303                                  const void *data)
2304 {
2305         const struct nfs4_create_arg *args = data;
2306
2307         nfs4_xdr_enc_create(req, xdr, args);
2308 }
2309
2310 /*
2311  * Encode GETATTR request
2312  */
2313 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2314                                  const void *data)
2315 {
2316         const struct nfs4_getattr_arg *args = data;
2317         struct compound_hdr hdr = {
2318                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2319         };
2320
2321         encode_compound_hdr(xdr, req, &hdr);
2322         encode_sequence(xdr, &args->seq_args, &hdr);
2323         encode_putfh(xdr, args->fh, &hdr);
2324         encode_getfattr(xdr, args->bitmask, &hdr);
2325         encode_nops(&hdr);
2326 }
2327
2328 /*
2329  * Encode a CLOSE request
2330  */
2331 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2332                                const void *data)
2333 {
2334         const struct nfs_closeargs *args = data;
2335         struct compound_hdr hdr = {
2336                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2337         };
2338
2339         encode_compound_hdr(xdr, req, &hdr);
2340         encode_sequence(xdr, &args->seq_args, &hdr);
2341         encode_putfh(xdr, args->fh, &hdr);
2342         if (args->lr_args)
2343                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2344         if (args->bitmask != NULL)
2345                 encode_getfattr(xdr, args->bitmask, &hdr);
2346         encode_close(xdr, args, &hdr);
2347         encode_nops(&hdr);
2348 }
2349
2350 /*
2351  * Encode an OPEN request
2352  */
2353 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2354                               const void *data)
2355 {
2356         const struct nfs_openargs *args = data;
2357         struct compound_hdr hdr = {
2358                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2359         };
2360
2361         encode_compound_hdr(xdr, req, &hdr);
2362         encode_sequence(xdr, &args->seq_args, &hdr);
2363         encode_putfh(xdr, args->fh, &hdr);
2364         encode_open(xdr, args, &hdr);
2365         encode_getfh(xdr, &hdr);
2366         if (args->access)
2367                 encode_access(xdr, args->access, &hdr);
2368         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2369         if (args->lg_args) {
2370                 encode_layoutget(xdr, args->lg_args, &hdr);
2371                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2372                                         args->lg_args->layout.pglen,
2373                                         hdr.replen - pagepad_maxsz);
2374         }
2375         encode_nops(&hdr);
2376 }
2377
2378 /*
2379  * Encode an OPEN_CONFIRM request
2380  */
2381 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2382                                       struct xdr_stream *xdr,
2383                                       const void *data)
2384 {
2385         const struct nfs_open_confirmargs *args = data;
2386         struct compound_hdr hdr = {
2387                 .nops   = 0,
2388         };
2389
2390         encode_compound_hdr(xdr, req, &hdr);
2391         encode_putfh(xdr, args->fh, &hdr);
2392         encode_open_confirm(xdr, args, &hdr);
2393         encode_nops(&hdr);
2394 }
2395
2396 /*
2397  * Encode an OPEN request with no attributes.
2398  */
2399 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2400                                      struct xdr_stream *xdr,
2401                                      const void *data)
2402 {
2403         const struct nfs_openargs *args = data;
2404         struct compound_hdr hdr = {
2405                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2406         };
2407
2408         encode_compound_hdr(xdr, req, &hdr);
2409         encode_sequence(xdr, &args->seq_args, &hdr);
2410         encode_putfh(xdr, args->fh, &hdr);
2411         encode_open(xdr, args, &hdr);
2412         if (args->access)
2413                 encode_access(xdr, args->access, &hdr);
2414         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2415         if (args->lg_args) {
2416                 encode_layoutget(xdr, args->lg_args, &hdr);
2417                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2418                                         args->lg_args->layout.pglen,
2419                                         hdr.replen - pagepad_maxsz);
2420         }
2421         encode_nops(&hdr);
2422 }
2423
2424 /*
2425  * Encode an OPEN_DOWNGRADE request
2426  */
2427 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2428                                         struct xdr_stream *xdr,
2429                                         const void *data)
2430 {
2431         const struct nfs_closeargs *args = data;
2432         struct compound_hdr hdr = {
2433                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2434         };
2435
2436         encode_compound_hdr(xdr, req, &hdr);
2437         encode_sequence(xdr, &args->seq_args, &hdr);
2438         encode_putfh(xdr, args->fh, &hdr);
2439         if (args->lr_args)
2440                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2441         encode_open_downgrade(xdr, args, &hdr);
2442         encode_nops(&hdr);
2443 }
2444
2445 /*
2446  * Encode a LOCK request
2447  */
2448 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2449                               const void *data)
2450 {
2451         const struct nfs_lock_args *args = data;
2452         struct compound_hdr hdr = {
2453                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2454         };
2455
2456         encode_compound_hdr(xdr, req, &hdr);
2457         encode_sequence(xdr, &args->seq_args, &hdr);
2458         encode_putfh(xdr, args->fh, &hdr);
2459         encode_lock(xdr, args, &hdr);
2460         encode_nops(&hdr);
2461 }
2462
2463 /*
2464  * Encode a LOCKT request
2465  */
2466 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2467                                const void *data)
2468 {
2469         const struct nfs_lockt_args *args = data;
2470         struct compound_hdr hdr = {
2471                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2472         };
2473
2474         encode_compound_hdr(xdr, req, &hdr);
2475         encode_sequence(xdr, &args->seq_args, &hdr);
2476         encode_putfh(xdr, args->fh, &hdr);
2477         encode_lockt(xdr, args, &hdr);
2478         encode_nops(&hdr);
2479 }
2480
2481 /*
2482  * Encode a LOCKU request
2483  */
2484 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2485                                const void *data)
2486 {
2487         const struct nfs_locku_args *args = data;
2488         struct compound_hdr hdr = {
2489                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2490         };
2491
2492         encode_compound_hdr(xdr, req, &hdr);
2493         encode_sequence(xdr, &args->seq_args, &hdr);
2494         encode_putfh(xdr, args->fh, &hdr);
2495         encode_locku(xdr, args, &hdr);
2496         encode_nops(&hdr);
2497 }
2498
2499 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2500                                            struct xdr_stream *xdr,
2501                                            const void *data)
2502 {
2503         const struct nfs_release_lockowner_args *args = data;
2504         struct compound_hdr hdr = {
2505                 .minorversion = 0,
2506         };
2507
2508         encode_compound_hdr(xdr, req, &hdr);
2509         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2510         encode_nops(&hdr);
2511 }
2512
2513 /*
2514  * Encode a READLINK request
2515  */
2516 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                   const void *data)
2518 {
2519         const struct nfs4_readlink *args = data;
2520         struct compound_hdr hdr = {
2521                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2522         };
2523
2524         encode_compound_hdr(xdr, req, &hdr);
2525         encode_sequence(xdr, &args->seq_args, &hdr);
2526         encode_putfh(xdr, args->fh, &hdr);
2527         encode_readlink(xdr, args, req, &hdr);
2528
2529         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2530                                 args->pglen, hdr.replen - pagepad_maxsz);
2531         encode_nops(&hdr);
2532 }
2533
2534 /*
2535  * Encode a READDIR request
2536  */
2537 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2538                                  const void *data)
2539 {
2540         const struct nfs4_readdir_arg *args = data;
2541         struct compound_hdr hdr = {
2542                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2543         };
2544
2545         encode_compound_hdr(xdr, req, &hdr);
2546         encode_sequence(xdr, &args->seq_args, &hdr);
2547         encode_putfh(xdr, args->fh, &hdr);
2548         encode_readdir(xdr, args, req, &hdr);
2549
2550         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2551                                 args->count, hdr.replen - pagepad_maxsz);
2552         encode_nops(&hdr);
2553 }
2554
2555 /*
2556  * Encode a READ request
2557  */
2558 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2559                               const void *data)
2560 {
2561         const struct nfs_pgio_args *args = data;
2562         struct compound_hdr hdr = {
2563                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2564         };
2565
2566         encode_compound_hdr(xdr, req, &hdr);
2567         encode_sequence(xdr, &args->seq_args, &hdr);
2568         encode_putfh(xdr, args->fh, &hdr);
2569         encode_read(xdr, args, &hdr);
2570
2571         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2572                                 args->count, hdr.replen - pagepad_maxsz);
2573         req->rq_rcv_buf.flags |= XDRBUF_READ;
2574         encode_nops(&hdr);
2575 }
2576
2577 /*
2578  * Encode an SETATTR request
2579  */
2580 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2581                                  const void *data)
2582 {
2583         const struct nfs_setattrargs *args = data;
2584         struct compound_hdr hdr = {
2585                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2586         };
2587
2588         encode_compound_hdr(xdr, req, &hdr);
2589         encode_sequence(xdr, &args->seq_args, &hdr);
2590         encode_putfh(xdr, args->fh, &hdr);
2591         encode_setattr(xdr, args, args->server, &hdr);
2592         encode_getfattr(xdr, args->bitmask, &hdr);
2593         encode_nops(&hdr);
2594 }
2595
2596 /*
2597  * Encode a GETACL request
2598  */
2599 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2600                                 const void *data)
2601 {
2602         const struct nfs_getaclargs *args = data;
2603         struct compound_hdr hdr = {
2604                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2605         };
2606         __u32 nfs4_acl_bitmap[2];
2607         uint32_t replen;
2608
2609         nfs4_acltype_to_bitmap(args->acl_type, nfs4_acl_bitmap);
2610
2611         encode_compound_hdr(xdr, req, &hdr);
2612         encode_sequence(xdr, &args->seq_args, &hdr);
2613         encode_putfh(xdr, args->fh, &hdr);
2614         replen = hdr.replen + op_decode_hdr_maxsz;
2615         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2616                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2617
2618         rpc_prepare_reply_pages(req, args->acl_pages, 0,
2619                                 args->acl_len, replen);
2620         encode_nops(&hdr);
2621 }
2622
2623 /*
2624  * Encode a WRITE request
2625  */
2626 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2627                                const void *data)
2628 {
2629         const struct nfs_pgio_args *args = data;
2630         struct compound_hdr hdr = {
2631                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2632         };
2633
2634         encode_compound_hdr(xdr, req, &hdr);
2635         encode_sequence(xdr, &args->seq_args, &hdr);
2636         encode_putfh(xdr, args->fh, &hdr);
2637         encode_write(xdr, args, &hdr);
2638         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2639         if (args->bitmask)
2640                 encode_getfattr(xdr, args->bitmask, &hdr);
2641         encode_nops(&hdr);
2642 }
2643
2644 /*
2645  *  a COMMIT request
2646  */
2647 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2648                                 const void *data)
2649 {
2650         const struct nfs_commitargs *args = data;
2651         struct compound_hdr hdr = {
2652                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2653         };
2654
2655         encode_compound_hdr(xdr, req, &hdr);
2656         encode_sequence(xdr, &args->seq_args, &hdr);
2657         encode_putfh(xdr, args->fh, &hdr);
2658         encode_commit(xdr, args, &hdr);
2659         encode_nops(&hdr);
2660 }
2661
2662 /*
2663  * FSINFO request
2664  */
2665 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2666                                 const void *data)
2667 {
2668         const struct nfs4_fsinfo_arg *args = data;
2669         struct compound_hdr hdr = {
2670                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2671         };
2672
2673         encode_compound_hdr(xdr, req, &hdr);
2674         encode_sequence(xdr, &args->seq_args, &hdr);
2675         encode_putfh(xdr, args->fh, &hdr);
2676         encode_fsinfo(xdr, args->bitmask, &hdr);
2677         encode_nops(&hdr);
2678 }
2679
2680 /*
2681  * a PATHCONF request
2682  */
2683 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2684                                   const void *data)
2685 {
2686         const struct nfs4_pathconf_arg *args = data;
2687         struct compound_hdr hdr = {
2688                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2689         };
2690
2691         encode_compound_hdr(xdr, req, &hdr);
2692         encode_sequence(xdr, &args->seq_args, &hdr);
2693         encode_putfh(xdr, args->fh, &hdr);
2694         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2695                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2696         encode_nops(&hdr);
2697 }
2698
2699 /*
2700  * a STATFS request
2701  */
2702 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2703                                 const void *data)
2704 {
2705         const struct nfs4_statfs_arg *args = data;
2706         struct compound_hdr hdr = {
2707                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2708         };
2709
2710         encode_compound_hdr(xdr, req, &hdr);
2711         encode_sequence(xdr, &args->seq_args, &hdr);
2712         encode_putfh(xdr, args->fh, &hdr);
2713         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2714                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2715         encode_nops(&hdr);
2716 }
2717
2718 /*
2719  * GETATTR_BITMAP request
2720  */
2721 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2722                                      struct xdr_stream *xdr,
2723                                      const void *data)
2724 {
2725         const struct nfs4_server_caps_arg *args = data;
2726         const u32 *bitmask = args->bitmask;
2727         struct compound_hdr hdr = {
2728                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2729         };
2730
2731         encode_compound_hdr(xdr, req, &hdr);
2732         encode_sequence(xdr, &args->seq_args, &hdr);
2733         encode_putfh(xdr, args->fhandle, &hdr);
2734         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2735         encode_nops(&hdr);
2736 }
2737
2738 /*
2739  * a RENEW request
2740  */
2741 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2742                                const void *data)
2743
2744 {
2745         const struct nfs_client *clp = data;
2746         struct compound_hdr hdr = {
2747                 .nops   = 0,
2748         };
2749
2750         encode_compound_hdr(xdr, req, &hdr);
2751         encode_renew(xdr, clp->cl_clientid, &hdr);
2752         encode_nops(&hdr);
2753 }
2754
2755 /*
2756  * a SETCLIENTID request
2757  */
2758 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2759                                      struct xdr_stream *xdr,
2760                                      const void *data)
2761 {
2762         const struct nfs4_setclientid *sc = data;
2763         struct compound_hdr hdr = {
2764                 .nops   = 0,
2765         };
2766
2767         encode_compound_hdr(xdr, req, &hdr);
2768         encode_setclientid(xdr, sc, &hdr);
2769         encode_nops(&hdr);
2770 }
2771
2772 /*
2773  * a SETCLIENTID_CONFIRM request
2774  */
2775 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2776                                              struct xdr_stream *xdr,
2777                                              const void *data)
2778 {
2779         const struct nfs4_setclientid_res *arg = data;
2780         struct compound_hdr hdr = {
2781                 .nops   = 0,
2782         };
2783
2784         encode_compound_hdr(xdr, req, &hdr);
2785         encode_setclientid_confirm(xdr, arg, &hdr);
2786         encode_nops(&hdr);
2787 }
2788
2789 /*
2790  * DELEGRETURN request
2791  */
2792 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2793                                      struct xdr_stream *xdr,
2794                                      const void *data)
2795 {
2796         const struct nfs4_delegreturnargs *args = data;
2797         struct compound_hdr hdr = {
2798                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2799         };
2800
2801         encode_compound_hdr(xdr, req, &hdr);
2802         encode_sequence(xdr, &args->seq_args, &hdr);
2803         encode_putfh(xdr, args->fhandle, &hdr);
2804         if (args->lr_args)
2805                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2806         if (args->bitmask)
2807                 encode_getfattr(xdr, args->bitmask, &hdr);
2808         encode_delegreturn(xdr, args->stateid, &hdr);
2809         encode_nops(&hdr);
2810 }
2811
2812 /*
2813  * Encode FS_LOCATIONS request
2814  */
2815 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2816                                       struct xdr_stream *xdr,
2817                                       const void *data)
2818 {
2819         const struct nfs4_fs_locations_arg *args = data;
2820         struct compound_hdr hdr = {
2821                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2822         };
2823         uint32_t replen;
2824
2825         encode_compound_hdr(xdr, req, &hdr);
2826         encode_sequence(xdr, &args->seq_args, &hdr);
2827         if (args->migration) {
2828                 encode_putfh(xdr, args->fh, &hdr);
2829                 replen = hdr.replen;
2830                 encode_fs_locations(xdr, args->bitmask, &hdr);
2831                 if (args->renew)
2832                         encode_renew(xdr, args->clientid, &hdr);
2833         } else {
2834                 encode_putfh(xdr, args->dir_fh, &hdr);
2835                 encode_lookup(xdr, args->name, &hdr);
2836                 replen = hdr.replen;
2837                 encode_fs_locations(xdr, args->bitmask, &hdr);
2838         }
2839
2840         rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2841                                 PAGE_SIZE, replen);
2842         encode_nops(&hdr);
2843 }
2844
2845 /*
2846  * Encode SECINFO request
2847  */
2848 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2849                                 struct xdr_stream *xdr,
2850                                 const void *data)
2851 {
2852         const struct nfs4_secinfo_arg *args = data;
2853         struct compound_hdr hdr = {
2854                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2855         };
2856
2857         encode_compound_hdr(xdr, req, &hdr);
2858         encode_sequence(xdr, &args->seq_args, &hdr);
2859         encode_putfh(xdr, args->dir_fh, &hdr);
2860         encode_secinfo(xdr, args->name, &hdr);
2861         encode_nops(&hdr);
2862 }
2863
2864 /*
2865  * Encode FSID_PRESENT request
2866  */
2867 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2868                                       struct xdr_stream *xdr,
2869                                       const void *data)
2870 {
2871         const struct nfs4_fsid_present_arg *args = data;
2872         struct compound_hdr hdr = {
2873                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2874         };
2875
2876         encode_compound_hdr(xdr, req, &hdr);
2877         encode_sequence(xdr, &args->seq_args, &hdr);
2878         encode_putfh(xdr, args->fh, &hdr);
2879         encode_getfh(xdr, &hdr);
2880         if (args->renew)
2881                 encode_renew(xdr, args->clientid, &hdr);
2882         encode_nops(&hdr);
2883 }
2884
2885 #if defined(CONFIG_NFS_V4_1)
2886 /*
2887  * BIND_CONN_TO_SESSION request
2888  */
2889 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2890                                 struct xdr_stream *xdr,
2891                                 const void *data)
2892 {
2893         const struct nfs41_bind_conn_to_session_args *args = data;
2894         struct compound_hdr hdr = {
2895                 .minorversion = args->client->cl_mvops->minor_version,
2896         };
2897
2898         encode_compound_hdr(xdr, req, &hdr);
2899         encode_bind_conn_to_session(xdr, args, &hdr);
2900         encode_nops(&hdr);
2901 }
2902
2903 /*
2904  * EXCHANGE_ID request
2905  */
2906 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2907                                      struct xdr_stream *xdr,
2908                                      const void *data)
2909 {
2910         const struct nfs41_exchange_id_args *args = data;
2911         struct compound_hdr hdr = {
2912                 .minorversion = args->client->cl_mvops->minor_version,
2913         };
2914
2915         encode_compound_hdr(xdr, req, &hdr);
2916         encode_exchange_id(xdr, args, &hdr);
2917         encode_nops(&hdr);
2918 }
2919
2920 /*
2921  * a CREATE_SESSION request
2922  */
2923 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2924                                         struct xdr_stream *xdr,
2925                                         const void *data)
2926 {
2927         const struct nfs41_create_session_args *args = data;
2928         struct compound_hdr hdr = {
2929                 .minorversion = args->client->cl_mvops->minor_version,
2930         };
2931
2932         encode_compound_hdr(xdr, req, &hdr);
2933         encode_create_session(xdr, args, &hdr);
2934         encode_nops(&hdr);
2935 }
2936
2937 /*
2938  * a DESTROY_SESSION request
2939  */
2940 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2941                                          struct xdr_stream *xdr,
2942                                          const void *data)
2943 {
2944         const struct nfs4_session *session = data;
2945         struct compound_hdr hdr = {
2946                 .minorversion = session->clp->cl_mvops->minor_version,
2947         };
2948
2949         encode_compound_hdr(xdr, req, &hdr);
2950         encode_destroy_session(xdr, session, &hdr);
2951         encode_nops(&hdr);
2952 }
2953
2954 /*
2955  * a DESTROY_CLIENTID request
2956  */
2957 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2958                                          struct xdr_stream *xdr,
2959                                          const void *data)
2960 {
2961         const struct nfs_client *clp = data;
2962         struct compound_hdr hdr = {
2963                 .minorversion = clp->cl_mvops->minor_version,
2964         };
2965
2966         encode_compound_hdr(xdr, req, &hdr);
2967         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2968         encode_nops(&hdr);
2969 }
2970
2971 /*
2972  * a SEQUENCE request
2973  */
2974 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2975                                   const void *data)
2976 {
2977         const struct nfs4_sequence_args *args = data;
2978         struct compound_hdr hdr = {
2979                 .minorversion = nfs4_xdr_minorversion(args),
2980         };
2981
2982         encode_compound_hdr(xdr, req, &hdr);
2983         encode_sequence(xdr, args, &hdr);
2984         encode_nops(&hdr);
2985 }
2986
2987 #endif
2988
2989 /*
2990  * a GET_LEASE_TIME request
2991  */
2992 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2993                                         struct xdr_stream *xdr,
2994                                         const void *data)
2995 {
2996         const struct nfs4_get_lease_time_args *args = data;
2997         struct compound_hdr hdr = {
2998                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2999         };
3000         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
3001
3002         encode_compound_hdr(xdr, req, &hdr);
3003         encode_sequence(xdr, &args->la_seq_args, &hdr);
3004         encode_putrootfh(xdr, &hdr);
3005         encode_fsinfo(xdr, lease_bitmap, &hdr);
3006         encode_nops(&hdr);
3007 }
3008
3009 #ifdef CONFIG_NFS_V4_1
3010
3011 /*
3012  * a RECLAIM_COMPLETE request
3013  */
3014 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
3015                                           struct xdr_stream *xdr,
3016                                           const void *data)
3017 {
3018         const struct nfs41_reclaim_complete_args *args = data;
3019         struct compound_hdr hdr = {
3020                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
3021         };
3022
3023         encode_compound_hdr(xdr, req, &hdr);
3024         encode_sequence(xdr, &args->seq_args, &hdr);
3025         encode_reclaim_complete(xdr, args, &hdr);
3026         encode_nops(&hdr);
3027 }
3028
3029 /*
3030  * Encode GETDEVICEINFO request
3031  */
3032 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3033                                        struct xdr_stream *xdr,
3034                                        const void *data)
3035 {
3036         const struct nfs4_getdeviceinfo_args *args = data;
3037         struct compound_hdr hdr = {
3038                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3039         };
3040         uint32_t replen;
3041
3042         encode_compound_hdr(xdr, req, &hdr);
3043         encode_sequence(xdr, &args->seq_args, &hdr);
3044
3045         replen = hdr.replen + op_decode_hdr_maxsz + 2;
3046
3047         encode_getdeviceinfo(xdr, args, &hdr);
3048
3049         /* set up reply kvec. device_addr4 opaque data is read into the
3050          * pages */
3051         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3052                                 args->pdev->pglen, replen);
3053         encode_nops(&hdr);
3054 }
3055
3056 /*
3057  *  Encode LAYOUTGET request
3058  */
3059 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3060                                    struct xdr_stream *xdr,
3061                                    const void *data)
3062 {
3063         const struct nfs4_layoutget_args *args = data;
3064         struct compound_hdr hdr = {
3065                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3066         };
3067
3068         encode_compound_hdr(xdr, req, &hdr);
3069         encode_sequence(xdr, &args->seq_args, &hdr);
3070         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3071         encode_layoutget(xdr, args, &hdr);
3072
3073         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3074                                 args->layout.pglen, hdr.replen - pagepad_maxsz);
3075         encode_nops(&hdr);
3076 }
3077
3078 /*
3079  *  Encode LAYOUTCOMMIT request
3080  */
3081 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3082                                       struct xdr_stream *xdr,
3083                                       const void *priv)
3084 {
3085         const struct nfs4_layoutcommit_args *args = priv;
3086         struct nfs4_layoutcommit_data *data =
3087                 container_of(args, struct nfs4_layoutcommit_data, args);
3088         struct compound_hdr hdr = {
3089                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3090         };
3091
3092         encode_compound_hdr(xdr, req, &hdr);
3093         encode_sequence(xdr, &args->seq_args, &hdr);
3094         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3095         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3096         encode_getfattr(xdr, args->bitmask, &hdr);
3097         encode_nops(&hdr);
3098 }
3099
3100 /*
3101  * Encode LAYOUTRETURN request
3102  */
3103 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3104                                       struct xdr_stream *xdr,
3105                                       const void *data)
3106 {
3107         const struct nfs4_layoutreturn_args *args = data;
3108         struct compound_hdr hdr = {
3109                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3110         };
3111
3112         encode_compound_hdr(xdr, req, &hdr);
3113         encode_sequence(xdr, &args->seq_args, &hdr);
3114         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3115         encode_layoutreturn(xdr, args, &hdr);
3116         encode_nops(&hdr);
3117 }
3118
3119 /*
3120  * Encode SECINFO_NO_NAME request
3121  */
3122 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3123                                         struct xdr_stream *xdr,
3124                                         const void *data)
3125 {
3126         const struct nfs41_secinfo_no_name_args *args = data;
3127         struct compound_hdr hdr = {
3128                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3129         };
3130
3131         encode_compound_hdr(xdr, req, &hdr);
3132         encode_sequence(xdr, &args->seq_args, &hdr);
3133         encode_putrootfh(xdr, &hdr);
3134         encode_secinfo_no_name(xdr, args, &hdr);
3135         encode_nops(&hdr);
3136 }
3137
3138 /*
3139  *  Encode TEST_STATEID request
3140  */
3141 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3142                                       struct xdr_stream *xdr,
3143                                       const void *data)
3144 {
3145         const struct nfs41_test_stateid_args *args = data;
3146         struct compound_hdr hdr = {
3147                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3148         };
3149
3150         encode_compound_hdr(xdr, req, &hdr);
3151         encode_sequence(xdr, &args->seq_args, &hdr);
3152         encode_test_stateid(xdr, args, &hdr);
3153         encode_nops(&hdr);
3154 }
3155
3156 /*
3157  *  Encode FREE_STATEID request
3158  */
3159 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3160                                      struct xdr_stream *xdr,
3161                                      const void *data)
3162 {
3163         const struct nfs41_free_stateid_args *args = data;
3164         struct compound_hdr hdr = {
3165                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3166         };
3167
3168         encode_compound_hdr(xdr, req, &hdr);
3169         encode_sequence(xdr, &args->seq_args, &hdr);
3170         encode_free_stateid(xdr, args, &hdr);
3171         encode_nops(&hdr);
3172 }
3173 #endif /* CONFIG_NFS_V4_1 */
3174
3175 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3176 {
3177         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3178                         NFS4_OPAQUE_LIMIT);
3179         if (unlikely(ret < 0))
3180                 return -EIO;
3181         *len = ret;
3182         return 0;
3183 }
3184
3185 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3186 {
3187         ssize_t ret;
3188         void *ptr;
3189         u32 tmp;
3190
3191         if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3192                 return -EIO;
3193         hdr->status = tmp;
3194
3195         ret = xdr_stream_decode_opaque_inline(xdr, &ptr, NFS4_OPAQUE_LIMIT);
3196         if (ret < 0)
3197                 return -EIO;
3198         hdr->taglen = ret;
3199         hdr->tag = ptr;
3200
3201         if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3202                 return -EIO;
3203         hdr->nops = tmp;
3204         if (unlikely(hdr->nops < 1))
3205                 return nfs4_stat_to_errno(hdr->status);
3206         return 0;
3207 }
3208
3209 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3210                 int *nfs_retval)
3211 {
3212         __be32 *p;
3213         uint32_t opnum;
3214         int32_t nfserr;
3215
3216         p = xdr_inline_decode(xdr, 8);
3217         if (unlikely(!p))
3218                 goto out_overflow;
3219         opnum = be32_to_cpup(p++);
3220         if (unlikely(opnum != expected))
3221                 goto out_bad_operation;
3222         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3223                 goto out_status;
3224         *nfs_retval = 0;
3225         return true;
3226 out_status:
3227         nfserr = be32_to_cpup(p);
3228         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3229         *nfs_retval = nfs4_stat_to_errno(nfserr);
3230         return true;
3231 out_bad_operation:
3232         trace_nfs4_xdr_bad_operation(xdr, opnum, expected);
3233         *nfs_retval = -EREMOTEIO;
3234         return false;
3235 out_overflow:
3236         *nfs_retval = -EIO;
3237         return false;
3238 }
3239
3240 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3241 {
3242         int retval;
3243
3244         __decode_op_hdr(xdr, expected, &retval);
3245         return retval;
3246 }
3247
3248 /* Dummy routine */
3249 static int decode_ace(struct xdr_stream *xdr, void *ace)
3250 {
3251         __be32 *p;
3252         unsigned int strlen;
3253         char *str;
3254
3255         p = xdr_inline_decode(xdr, 12);
3256         if (unlikely(!p))
3257                 return -EIO;
3258         return decode_opaque_inline(xdr, &strlen, &str);
3259 }
3260
3261 static ssize_t
3262 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3263 {
3264         ssize_t ret;
3265
3266         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3267         if (likely(ret >= 0))
3268                 return ret;
3269         if (ret != -EMSGSIZE)
3270                 return -EIO;
3271         return sz;
3272 }
3273
3274 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3275 {
3276         ssize_t ret;
3277         ret = decode_bitmap4(xdr, bitmap, 3);
3278         return ret < 0 ? ret : 0;
3279 }
3280
3281 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3282 {
3283         __be32 *p;
3284
3285         p = xdr_inline_decode(xdr, 4);
3286         if (unlikely(!p))
3287                 return -EIO;
3288         *attrlen = be32_to_cpup(p);
3289         *savep = xdr_stream_pos(xdr);
3290         return 0;
3291 }
3292
3293 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3294 {
3295         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3296                 int ret;
3297                 ret = decode_attr_bitmap(xdr, bitmask);
3298                 if (unlikely(ret < 0))
3299                         return ret;
3300                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3301         } else
3302                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3303         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3304                 bitmask[0], bitmask[1], bitmask[2]);
3305         return 0;
3306 }
3307
3308 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3309 {
3310         __be32 *p;
3311         int ret = 0;
3312
3313         *type = 0;
3314         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3315                 return -EIO;
3316         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3317                 p = xdr_inline_decode(xdr, 4);
3318                 if (unlikely(!p))
3319                         return -EIO;
3320                 *type = be32_to_cpup(p);
3321                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3322                         dprintk("%s: bad type %d\n", __func__, *type);
3323                         return -EIO;
3324                 }
3325                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3326                 ret = NFS_ATTR_FATTR_TYPE;
3327         }
3328         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3329         return ret;
3330 }
3331
3332 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3333                                       uint32_t *bitmap, uint32_t *type)
3334 {
3335         __be32 *p;
3336
3337         *type = 0;
3338         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3339                 return -EIO;
3340         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3341                 p = xdr_inline_decode(xdr, 4);
3342                 if (unlikely(!p))
3343                         return -EIO;
3344                 *type = be32_to_cpup(p);
3345                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3346         }
3347         dprintk("%s: expire type=0x%x\n", __func__, *type);
3348         return 0;
3349 }
3350
3351 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3352 {
3353         __be32 *p;
3354         int ret = 0;
3355
3356         *change = 0;
3357         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3358                 return -EIO;
3359         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3360                 p = xdr_inline_decode(xdr, 8);
3361                 if (unlikely(!p))
3362                         return -EIO;
3363                 xdr_decode_hyper(p, change);
3364                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3365                 ret = NFS_ATTR_FATTR_CHANGE;
3366         }
3367         dprintk("%s: change attribute=%Lu\n", __func__,
3368                         (unsigned long long)*change);
3369         return ret;
3370 }
3371
3372 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3373 {
3374         __be32 *p;
3375         int ret = 0;
3376
3377         *size = 0;
3378         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3379                 return -EIO;
3380         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3381                 p = xdr_inline_decode(xdr, 8);
3382                 if (unlikely(!p))
3383                         return -EIO;
3384                 xdr_decode_hyper(p, size);
3385                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3386                 ret = NFS_ATTR_FATTR_SIZE;
3387         }
3388         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3389         return ret;
3390 }
3391
3392 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3393 {
3394         __be32 *p;
3395
3396         *res = 0;
3397         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3398                 return -EIO;
3399         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3400                 p = xdr_inline_decode(xdr, 4);
3401                 if (unlikely(!p))
3402                         return -EIO;
3403                 *res = be32_to_cpup(p);
3404                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3405         }
3406         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3407         return 0;
3408 }
3409
3410 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3411 {
3412         __be32 *p;
3413
3414         *res = 0;
3415         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3416                 return -EIO;
3417         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3418                 p = xdr_inline_decode(xdr, 4);
3419                 if (unlikely(!p))
3420                         return -EIO;
3421                 *res = be32_to_cpup(p);
3422                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3423         }
3424         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3425         return 0;
3426 }
3427
3428 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3429 {
3430         __be32 *p;
3431         int ret = 0;
3432
3433         fsid->major = 0;
3434         fsid->minor = 0;
3435         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3436                 return -EIO;
3437         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3438                 p = xdr_inline_decode(xdr, 16);
3439                 if (unlikely(!p))
3440                         return -EIO;
3441                 p = xdr_decode_hyper(p, &fsid->major);
3442                 xdr_decode_hyper(p, &fsid->minor);
3443                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3444                 ret = NFS_ATTR_FATTR_FSID;
3445         }
3446         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3447                         (unsigned long long)fsid->major,
3448                         (unsigned long long)fsid->minor);
3449         return ret;
3450 }
3451
3452 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3453 {
3454         __be32 *p;
3455
3456         *res = 60;
3457         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3458                 return -EIO;
3459         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3460                 p = xdr_inline_decode(xdr, 4);
3461                 if (unlikely(!p))
3462                         return -EIO;
3463                 *res = be32_to_cpup(p);
3464                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3465         }
3466         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3467         return 0;
3468 }
3469
3470 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3471 {
3472         __be32 *p;
3473
3474         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3475                 return -EIO;
3476         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3477                 p = xdr_inline_decode(xdr, 4);
3478                 if (unlikely(!p))
3479                         return -EIO;
3480                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3481                 *res = -be32_to_cpup(p);
3482         }
3483         return 0;
3484 }
3485
3486 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3487                                  uint32_t *bitmap, uint32_t *bitmask)
3488 {
3489         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3490                 int ret;
3491                 ret = decode_attr_bitmap(xdr, bitmask);
3492                 if (unlikely(ret < 0))
3493                         return ret;
3494                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3495         } else
3496                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3497         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3498                 bitmask[0], bitmask[1], bitmask[2]);
3499         return 0;
3500 }
3501
3502 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3503 {
3504         __be32 *p;
3505         u32 len;
3506
3507         if (fh != NULL)
3508                 memset(fh, 0, sizeof(*fh));
3509
3510         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3511                 return -EIO;
3512         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3513                 p = xdr_inline_decode(xdr, 4);
3514                 if (unlikely(!p))
3515                         return -EIO;
3516                 len = be32_to_cpup(p);
3517                 if (len > NFS4_FHSIZE || len == 0) {
3518                         trace_nfs4_xdr_bad_filehandle(xdr, OP_READDIR,
3519                                                       NFS4ERR_BADHANDLE);
3520                         return -EREMOTEIO;
3521                 }
3522                 p = xdr_inline_decode(xdr, len);
3523                 if (unlikely(!p))
3524                         return -EIO;
3525                 if (fh != NULL) {
3526                         memcpy(fh->data, p, len);
3527                         fh->size = len;
3528                 }
3529                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3530         }
3531         return 0;
3532 }
3533
3534 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3535 {
3536         __be32 *p;
3537
3538         *res = 0;
3539         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3540                 return -EIO;
3541         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3542                 p = xdr_inline_decode(xdr, 4);
3543                 if (unlikely(!p))
3544                         return -EIO;
3545                 *res = be32_to_cpup(p);
3546                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3547         }
3548         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3549         return 0;
3550 }
3551
3552 static int decode_attr_case_insensitive(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3553 {
3554         __be32 *p;
3555
3556         *res = 0;
3557         if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_INSENSITIVE - 1U)))
3558                 return -EIO;
3559         if (likely(bitmap[0] & FATTR4_WORD0_CASE_INSENSITIVE)) {
3560                 p = xdr_inline_decode(xdr, 4);
3561                 if (unlikely(!p))
3562                         return -EIO;
3563                 *res = be32_to_cpup(p);
3564                 bitmap[0] &= ~FATTR4_WORD0_CASE_INSENSITIVE;
3565         }
3566         dprintk("%s: case_insensitive=%s\n", __func__, *res == 0 ? "false" : "true");
3567         return 0;
3568 }
3569
3570 static int decode_attr_case_preserving(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3571 {
3572         __be32 *p;
3573
3574         *res = 0;
3575         if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_PRESERVING - 1U)))
3576                 return -EIO;
3577         if (likely(bitmap[0] & FATTR4_WORD0_CASE_PRESERVING)) {
3578                 p = xdr_inline_decode(xdr, 4);
3579                 if (unlikely(!p))
3580                         return -EIO;
3581                 *res = be32_to_cpup(p);
3582                 bitmap[0] &= ~FATTR4_WORD0_CASE_PRESERVING;
3583         }
3584         dprintk("%s: case_preserving=%s\n", __func__, *res == 0 ? "false" : "true");
3585         return 0;
3586 }
3587
3588 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3589 {
3590         __be32 *p;
3591         int ret = 0;
3592
3593         *fileid = 0;
3594         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3595                 return -EIO;
3596         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3597                 p = xdr_inline_decode(xdr, 8);
3598                 if (unlikely(!p))
3599                         return -EIO;
3600                 xdr_decode_hyper(p, fileid);
3601                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3602                 ret = NFS_ATTR_FATTR_FILEID;
3603         }
3604         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3605         return ret;
3606 }
3607
3608 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3609 {
3610         __be32 *p;
3611         int ret = 0;
3612
3613         *fileid = 0;
3614         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3615                 return -EIO;
3616         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3617                 p = xdr_inline_decode(xdr, 8);
3618                 if (unlikely(!p))
3619                         return -EIO;
3620                 xdr_decode_hyper(p, fileid);
3621                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3622                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3623         }
3624         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3625         return ret;
3626 }
3627
3628 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3629 {
3630         __be32 *p;
3631         int status = 0;
3632
3633         *res = 0;
3634         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3635                 return -EIO;
3636         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3637                 p = xdr_inline_decode(xdr, 8);
3638                 if (unlikely(!p))
3639                         return -EIO;
3640                 xdr_decode_hyper(p, res);
3641                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3642         }
3643         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3644         return status;
3645 }
3646
3647 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3648 {
3649         __be32 *p;
3650         int status = 0;
3651
3652         *res = 0;
3653         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3654                 return -EIO;
3655         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3656                 p = xdr_inline_decode(xdr, 8);
3657                 if (unlikely(!p))
3658                         return -EIO;
3659                 xdr_decode_hyper(p, res);
3660                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3661         }
3662         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3663         return status;
3664 }
3665
3666 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3667 {
3668         __be32 *p;
3669         int status = 0;
3670
3671         *res = 0;
3672         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3673                 return -EIO;
3674         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3675                 p = xdr_inline_decode(xdr, 8);
3676                 if (unlikely(!p))
3677                         return -EIO;
3678                 xdr_decode_hyper(p, res);
3679                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3680         }
3681         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3682         return status;
3683 }
3684
3685 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3686 {
3687         u32 n;
3688         __be32 *p;
3689         int status = 0;
3690
3691         p = xdr_inline_decode(xdr, 4);
3692         if (unlikely(!p))
3693                 return -EIO;
3694         n = be32_to_cpup(p);
3695         if (n == 0)
3696                 goto root_path;
3697         dprintk("pathname4: ");
3698         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3699                 dprintk("cannot parse %d components in path\n", n);
3700                 goto out_eio;
3701         }
3702         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3703                 struct nfs4_string *component = &path->components[path->ncomponents];
3704                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3705                 if (unlikely(status != 0))
3706                         goto out_eio;
3707                 ifdebug (XDR)
3708                         pr_cont("%s%.*s ",
3709                                 (path->ncomponents != n ? "/ " : ""),
3710                                 component->len, component->data);
3711         }
3712 out:
3713         return status;
3714 root_path:
3715 /* a root pathname is sent as a zero component4 */
3716         path->ncomponents = 1;
3717         path->components[0].len=0;
3718         path->components[0].data=NULL;
3719         dprintk("pathname4: /\n");
3720         goto out;
3721 out_eio:
3722         dprintk(" status %d", status);
3723         status = -EIO;
3724         goto out;
3725 }
3726
3727 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3728 {
3729         int n;
3730         __be32 *p;
3731         int status = -EIO;
3732
3733         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3734                 goto out;
3735         status = 0;
3736         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3737                 goto out;
3738         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3739         status = -EIO;
3740         /* Ignore borken servers that return unrequested attrs */
3741         if (unlikely(res == NULL))
3742                 goto out;
3743         dprintk("%s: fsroot:\n", __func__);
3744         status = decode_pathname(xdr, &res->fs_path);
3745         if (unlikely(status != 0))
3746                 goto out;
3747         p = xdr_inline_decode(xdr, 4);
3748         if (unlikely(!p))
3749                 goto out_eio;
3750         n = be32_to_cpup(p);
3751         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3752                 u32 m;
3753                 struct nfs4_fs_location *loc;
3754
3755                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3756                         break;
3757                 loc = &res->locations[res->nlocations];
3758                 p = xdr_inline_decode(xdr, 4);
3759                 if (unlikely(!p))
3760                         goto out_eio;
3761                 m = be32_to_cpup(p);
3762
3763                 dprintk("%s: servers:\n", __func__);
3764                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3765                         struct nfs4_string *server;
3766
3767                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3768                                 unsigned int i;
3769                                 dprintk("%s: using first %u of %u servers "
3770                                         "returned for location %u\n",
3771                                                 __func__,
3772                                                 NFS4_FS_LOCATION_MAXSERVERS,
3773                                                 m, res->nlocations);
3774                                 for (i = loc->nservers; i < m; i++) {
3775                                         unsigned int len;
3776                                         char *data;
3777                                         status = decode_opaque_inline(xdr, &len, &data);
3778                                         if (unlikely(status != 0))
3779                                                 goto out_eio;
3780                                 }
3781                                 break;
3782                         }
3783                         server = &loc->servers[loc->nservers];
3784                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3785                         if (unlikely(status != 0))
3786                                 goto out_eio;
3787                         dprintk("%s ", server->data);
3788                 }
3789                 status = decode_pathname(xdr, &loc->rootpath);
3790                 if (unlikely(status != 0))
3791                         goto out_eio;
3792         }
3793         if (res->nlocations != 0)
3794                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3795 out:
3796         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3797         return status;
3798 out_eio:
3799         status = -EIO;
3800         goto out;
3801 }
3802
3803 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3804 {
3805         __be32 *p;
3806         int status = 0;
3807
3808         *res = 0;
3809         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3810                 return -EIO;
3811         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3812                 p = xdr_inline_decode(xdr, 8);
3813                 if (unlikely(!p))
3814                         return -EIO;
3815                 xdr_decode_hyper(p, res);
3816                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3817         }
3818         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3819         return status;
3820 }
3821
3822 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3823 {
3824         __be32 *p;
3825         int status = 0;
3826
3827         *maxlink = 1;
3828         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3829                 return -EIO;
3830         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3831                 p = xdr_inline_decode(xdr, 4);
3832                 if (unlikely(!p))
3833                         return -EIO;
3834                 *maxlink = be32_to_cpup(p);
3835                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3836         }
3837         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3838         return status;
3839 }
3840
3841 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3842 {
3843         __be32 *p;
3844         int status = 0;
3845
3846         *maxname = 1024;
3847         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3848                 return -EIO;
3849         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3850                 p = xdr_inline_decode(xdr, 4);
3851                 if (unlikely(!p))
3852                         return -EIO;
3853                 *maxname = be32_to_cpup(p);
3854                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3855         }
3856         dprintk("%s: maxname=%u\n", __func__, *maxname);
3857         return status;
3858 }
3859
3860 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3861 {
3862         __be32 *p;
3863         int status = 0;
3864
3865         *res = 1024;
3866         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3867                 return -EIO;
3868         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3869                 uint64_t maxread;
3870                 p = xdr_inline_decode(xdr, 8);
3871                 if (unlikely(!p))
3872                         return -EIO;
3873                 xdr_decode_hyper(p, &maxread);
3874                 if (maxread > 0x7FFFFFFF)
3875                         maxread = 0x7FFFFFFF;
3876                 *res = (uint32_t)maxread;
3877                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3878         }
3879         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3880         return status;
3881 }
3882
3883 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3884 {
3885         __be32 *p;
3886         int status = 0;
3887
3888         *res = 1024;
3889         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3890                 return -EIO;
3891         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3892                 uint64_t maxwrite;
3893                 p = xdr_inline_decode(xdr, 8);
3894                 if (unlikely(!p))
3895                         return -EIO;
3896                 xdr_decode_hyper(p, &maxwrite);
3897                 if (maxwrite > 0x7FFFFFFF)
3898                         maxwrite = 0x7FFFFFFF;
3899                 *res = (uint32_t)maxwrite;
3900                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3901         }
3902         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3903         return status;
3904 }
3905
3906 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3907 {
3908         uint32_t tmp;
3909         __be32 *p;
3910         int ret = 0;
3911
3912         *mode = 0;
3913         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3914                 return -EIO;
3915         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3916                 p = xdr_inline_decode(xdr, 4);
3917                 if (unlikely(!p))
3918                         return -EIO;
3919                 tmp = be32_to_cpup(p);
3920                 *mode = tmp & ~S_IFMT;
3921                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3922                 ret = NFS_ATTR_FATTR_MODE;
3923         }
3924         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3925         return ret;
3926 }
3927
3928 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3929 {
3930         __be32 *p;
3931         int ret = 0;
3932
3933         *nlink = 1;
3934         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3935                 return -EIO;
3936         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3937                 p = xdr_inline_decode(xdr, 4);
3938                 if (unlikely(!p))
3939                         return -EIO;
3940                 *nlink = be32_to_cpup(p);
3941                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3942                 ret = NFS_ATTR_FATTR_NLINK;
3943         }
3944         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3945         return ret;
3946 }
3947
3948 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3949                 struct nfs4_string *name, gfp_t gfp_flags)
3950 {
3951         ssize_t ret;
3952
3953         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3954                         XDR_MAX_NETOBJ, gfp_flags);
3955         name->len = 0;
3956         if (ret > 0)
3957                 name->len = ret;
3958         return ret;
3959 }
3960
3961 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3962                 const struct nfs_server *server, kuid_t *uid,
3963                 struct nfs4_string *owner_name)
3964 {
3965         ssize_t len;
3966         char *p;
3967
3968         *uid = make_kuid(&init_user_ns, -2);
3969         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3970                 return -EIO;
3971         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3972                 return 0;
3973         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3974
3975         if (owner_name != NULL) {
3976                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3977                 if (len <= 0)
3978                         goto out;
3979                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3980                 return NFS_ATTR_FATTR_OWNER_NAME;
3981         } else {
3982                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3983                                 XDR_MAX_NETOBJ);
3984                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3985                         goto out;
3986                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3987                 return NFS_ATTR_FATTR_OWNER;
3988         }
3989 out:
3990         if (len == -EBADMSG)
3991                 return -EIO;
3992         return 0;
3993 }
3994
3995 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3996                 const struct nfs_server *server, kgid_t *gid,
3997                 struct nfs4_string *group_name)
3998 {
3999         ssize_t len;
4000         char *p;
4001
4002         *gid = make_kgid(&init_user_ns, -2);
4003         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4004                 return -EIO;
4005         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4006                 return 0;
4007         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4008
4009         if (group_name != NULL) {
4010                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4011                 if (len <= 0)
4012                         goto out;
4013                 dprintk("%s: name=%s\n", __func__, group_name->data);
4014                 return NFS_ATTR_FATTR_GROUP_NAME;
4015         } else {
4016                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4017                                 XDR_MAX_NETOBJ);
4018                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4019                         goto out;
4020                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4021                 return NFS_ATTR_FATTR_GROUP;
4022         }
4023 out:
4024         if (len == -EBADMSG)
4025                 return -EIO;
4026         return 0;
4027 }
4028
4029 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4030 {
4031         uint32_t major = 0, minor = 0;
4032         __be32 *p;
4033         int ret = 0;
4034
4035         *rdev = MKDEV(0,0);
4036         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4037                 return -EIO;
4038         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4039                 dev_t tmp;
4040
4041                 p = xdr_inline_decode(xdr, 8);
4042                 if (unlikely(!p))
4043                         return -EIO;
4044                 major = be32_to_cpup(p++);
4045                 minor = be32_to_cpup(p);
4046                 tmp = MKDEV(major, minor);
4047                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4048                         *rdev = tmp;
4049                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4050                 ret = NFS_ATTR_FATTR_RDEV;
4051         }
4052         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4053         return ret;
4054 }
4055
4056 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4057 {
4058         __be32 *p;
4059         int status = 0;
4060
4061         *res = 0;
4062         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4063                 return -EIO;
4064         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4065                 p = xdr_inline_decode(xdr, 8);
4066                 if (unlikely(!p))
4067                         return -EIO;
4068                 xdr_decode_hyper(p, res);
4069                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4070         }
4071         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4072         return status;
4073 }
4074
4075 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4076 {
4077         __be32 *p;
4078         int status = 0;
4079
4080         *res = 0;
4081         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4082                 return -EIO;
4083         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4084                 p = xdr_inline_decode(xdr, 8);
4085                 if (unlikely(!p))
4086                         return -EIO;
4087                 xdr_decode_hyper(p, res);
4088                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4089         }
4090         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4091         return status;
4092 }
4093
4094 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4095 {
4096         __be32 *p;
4097         int status = 0;
4098
4099         *res = 0;
4100         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4101                 return -EIO;
4102         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4103                 p = xdr_inline_decode(xdr, 8);
4104                 if (unlikely(!p))
4105                         return -EIO;
4106                 xdr_decode_hyper(p, res);
4107                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4108         }
4109         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4110         return status;
4111 }
4112
4113 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4114 {
4115         __be32 *p;
4116         int ret = 0;
4117
4118         *used = 0;
4119         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4120                 return -EIO;
4121         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4122                 p = xdr_inline_decode(xdr, 8);
4123                 if (unlikely(!p))
4124                         return -EIO;
4125                 xdr_decode_hyper(p, used);
4126                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4127                 ret = NFS_ATTR_FATTR_SPACE_USED;
4128         }
4129         dprintk("%s: space used=%Lu\n", __func__,
4130                         (unsigned long long)*used);
4131         return ret;
4132 }
4133
4134 static __be32 *
4135 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4136 {
4137         __u64 sec;
4138
4139         p = xdr_decode_hyper(p, &sec);
4140         t-> tv_sec = sec;
4141         t->tv_nsec = be32_to_cpup(p++);
4142         return p;
4143 }
4144
4145 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4146 {
4147         __be32 *p;
4148
4149         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4150         if (unlikely(!p))
4151                 return -EIO;
4152         xdr_decode_nfstime4(p, time);
4153         return 0;
4154 }
4155
4156 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4157 {
4158         int status = 0;
4159
4160         time->tv_sec = 0;
4161         time->tv_nsec = 0;
4162         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4163                 return -EIO;
4164         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4165                 status = decode_attr_time(xdr, time);
4166                 if (status == 0)
4167                         status = NFS_ATTR_FATTR_ATIME;
4168                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4169         }
4170         dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4171         return status;
4172 }
4173
4174 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4175 {
4176         int status = 0;
4177
4178         time->tv_sec = 0;
4179         time->tv_nsec = 0;
4180         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4181                 return -EIO;
4182         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4183                 status = decode_attr_time(xdr, time);
4184                 if (status == 0)
4185                         status = NFS_ATTR_FATTR_CTIME;
4186                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4187         }
4188         dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4189         return status;
4190 }
4191
4192 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4193                                   struct timespec64 *time)
4194 {
4195         int status = 0;
4196
4197         time->tv_sec = 0;
4198         time->tv_nsec = 0;
4199         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4200                 return -EIO;
4201         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4202                 status = decode_attr_time(xdr, time);
4203                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4204         }
4205         dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4206                 time->tv_nsec);
4207         return status;
4208 }
4209
4210 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4211                                         struct nfs4_label *label)
4212 {
4213         uint32_t pi = 0;
4214         uint32_t lfs = 0;
4215         __u32 len;
4216         __be32 *p;
4217         int status = 0;
4218
4219         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4220                 return -EIO;
4221         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4222                 p = xdr_inline_decode(xdr, 4);
4223                 if (unlikely(!p))
4224                         return -EIO;
4225                 lfs = be32_to_cpup(p++);
4226                 p = xdr_inline_decode(xdr, 4);
4227                 if (unlikely(!p))
4228                         return -EIO;
4229                 pi = be32_to_cpup(p++);
4230                 p = xdr_inline_decode(xdr, 4);
4231                 if (unlikely(!p))
4232                         return -EIO;
4233                 len = be32_to_cpup(p++);
4234                 p = xdr_inline_decode(xdr, len);
4235                 if (unlikely(!p))
4236                         return -EIO;
4237                 if (len < NFS4_MAXLABELLEN) {
4238                         if (label) {
4239                                 if (label->len) {
4240                                         if (label->len < len)
4241                                                 return -ERANGE;
4242                                         memcpy(label->label, p, len);
4243                                 }
4244                                 label->len = len;
4245                                 label->pi = pi;
4246                                 label->lfs = lfs;
4247                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4248                         }
4249                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4250                 } else
4251                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4252                                         __func__, len);
4253                 if (label && label->label)
4254                         dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n",
4255                                 __func__, label->len, (char *)label->label,
4256                                 label->len, label->pi, label->lfs);
4257         }
4258         return status;
4259 }
4260
4261 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4262 {
4263         int status = 0;
4264
4265         time->tv_sec = 0;
4266         time->tv_nsec = 0;
4267         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4268                 return -EIO;
4269         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4270                 status = decode_attr_time(xdr, time);
4271                 if (status == 0)
4272                         status = NFS_ATTR_FATTR_MTIME;
4273                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4274         }
4275         dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4276         return status;
4277 }
4278
4279 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4280                                     uint32_t *res)
4281 {
4282         __be32 *p;
4283
4284         *res = 0;
4285         if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4286                 return -EIO;
4287         if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4288                 p = xdr_inline_decode(xdr, 4);
4289                 if (unlikely(!p))
4290                         return -EIO;
4291                 *res = be32_to_cpup(p);
4292                 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4293         }
4294         dprintk("%s: XATTR support=%s\n", __func__,
4295                 *res == 0 ? "false" : "true");
4296         return 0;
4297 }
4298
4299 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4300 {
4301         unsigned int attrwords = XDR_QUADLEN(attrlen);
4302         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4303
4304         if (unlikely(attrwords != nwords)) {
4305                 dprintk("%s: server returned incorrect attribute length: "
4306                         "%u %c %u\n",
4307                                 __func__,
4308                                 attrwords << 2,
4309                                 (attrwords < nwords) ? '<' : '>',
4310                                 nwords << 2);
4311                 return -EIO;
4312         }
4313         return 0;
4314 }
4315
4316 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4317 {
4318         __be32 *p;
4319
4320         p = xdr_inline_decode(xdr, 20);
4321         if (unlikely(!p))
4322                 return -EIO;
4323         cinfo->atomic = be32_to_cpup(p++);
4324         p = xdr_decode_hyper(p, &cinfo->before);
4325         xdr_decode_hyper(p, &cinfo->after);
4326         return 0;
4327 }
4328
4329 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4330 {
4331         __be32 *p;
4332         uint32_t supp, acc;
4333         int status;
4334
4335         status = decode_op_hdr(xdr, OP_ACCESS);
4336         if (status)
4337                 return status;
4338         p = xdr_inline_decode(xdr, 8);
4339         if (unlikely(!p))
4340                 return -EIO;
4341         supp = be32_to_cpup(p++);
4342         acc = be32_to_cpup(p);
4343         *supported = supp;
4344         *access = acc;
4345         return 0;
4346 }
4347
4348 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4349 {
4350         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4351         if (unlikely(ret < 0))
4352                 return -EIO;
4353         return 0;
4354 }
4355
4356 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4357 {
4358         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4359 }
4360
4361 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4362 {
4363         stateid->type = NFS4_OPEN_STATEID_TYPE;
4364         return decode_stateid(xdr, stateid);
4365 }
4366
4367 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4368 {
4369         stateid->type = NFS4_LOCK_STATEID_TYPE;
4370         return decode_stateid(xdr, stateid);
4371 }
4372
4373 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4374 {
4375         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4376         return decode_stateid(xdr, stateid);
4377 }
4378
4379 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4380 {
4381         nfs4_stateid dummy;
4382
4383         nfs4_stateid_copy(stateid, &invalid_stateid);
4384         return decode_stateid(xdr, &dummy);
4385 }
4386
4387 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4388 {
4389         int status;
4390
4391         status = decode_op_hdr(xdr, OP_CLOSE);
4392         if (status != -EIO)
4393                 nfs_increment_open_seqid(status, res->seqid);
4394         if (!status)
4395                 status = decode_invalid_stateid(xdr, &res->stateid);
4396         return status;
4397 }
4398
4399 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4400 {
4401         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4402 }
4403
4404 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4405 {
4406         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4407 }
4408
4409 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4410 {
4411         struct nfs_writeverf *verf = res->verf;
4412         int status;
4413
4414         status = decode_op_hdr(xdr, OP_COMMIT);
4415         if (!status)
4416                 status = decode_write_verifier(xdr, &verf->verifier);
4417         if (!status)
4418                 verf->committed = NFS_FILE_SYNC;
4419         return status;
4420 }
4421
4422 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4423 {
4424         __be32 *p;
4425         uint32_t bmlen;
4426         int status;
4427
4428         status = decode_op_hdr(xdr, OP_CREATE);
4429         if (status)
4430                 return status;
4431         if ((status = decode_change_info(xdr, cinfo)))
4432                 return status;
4433         p = xdr_inline_decode(xdr, 4);
4434         if (unlikely(!p))
4435                 return -EIO;
4436         bmlen = be32_to_cpup(p);
4437         p = xdr_inline_decode(xdr, bmlen << 2);
4438         if (likely(p))
4439                 return 0;
4440         return -EIO;
4441 }
4442
4443 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4444 {
4445         unsigned int savep;
4446         uint32_t attrlen, bitmap[3] = {0};
4447         int status;
4448
4449         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4450                 goto xdr_error;
4451         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4452                 goto xdr_error;
4453         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4454                 goto xdr_error;
4455         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4456                 goto xdr_error;
4457         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4458                                                  &res->fh_expire_type)) != 0)
4459                 goto xdr_error;
4460         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4461                 goto xdr_error;
4462         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4463                 goto xdr_error;
4464         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4465                 goto xdr_error;
4466         if ((status = decode_attr_case_insensitive(xdr, bitmap, &res->case_insensitive)) != 0)
4467                 goto xdr_error;
4468         if ((status = decode_attr_case_preserving(xdr, bitmap, &res->case_preserving)) != 0)
4469                 goto xdr_error;
4470         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4471                                 res->exclcreat_bitmask)) != 0)
4472                 goto xdr_error;
4473         status = verify_attr_len(xdr, savep, attrlen);
4474 xdr_error:
4475         dprintk("%s: xdr returned %d!\n", __func__, -status);
4476         return status;
4477 }
4478
4479 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4480 {
4481         unsigned int savep;
4482         uint32_t attrlen, bitmap[3] = {0};
4483         int status;
4484
4485         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4486                 goto xdr_error;
4487         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4488                 goto xdr_error;
4489         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4490                 goto xdr_error;
4491
4492         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4493                 goto xdr_error;
4494         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4495                 goto xdr_error;
4496         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4497                 goto xdr_error;
4498
4499         status = -EIO;
4500         if (unlikely(bitmap[0]))
4501                 goto xdr_error;
4502
4503         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4504                 goto xdr_error;
4505         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4506                 goto xdr_error;
4507         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4508                 goto xdr_error;
4509
4510         status = verify_attr_len(xdr, savep, attrlen);
4511 xdr_error:
4512         dprintk("%s: xdr returned %d!\n", __func__, -status);
4513         return status;
4514 }
4515
4516 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4517 {
4518         unsigned int savep;
4519         uint32_t attrlen, bitmap[3] = {0};
4520         int status;
4521
4522         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4523                 goto xdr_error;
4524         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4525                 goto xdr_error;
4526         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4527                 goto xdr_error;
4528
4529         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4530                 goto xdr_error;
4531         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4532                 goto xdr_error;
4533
4534         status = verify_attr_len(xdr, savep, attrlen);
4535 xdr_error:
4536         dprintk("%s: xdr returned %d!\n", __func__, -status);
4537         return status;
4538 }
4539
4540 static int decode_threshold_hint(struct xdr_stream *xdr,
4541                                   uint32_t *bitmap,
4542                                   uint64_t *res,
4543                                   uint32_t hint_bit)
4544 {
4545         __be32 *p;
4546
4547         *res = 0;
4548         if (likely(bitmap[0] & hint_bit)) {
4549                 p = xdr_inline_decode(xdr, 8);
4550                 if (unlikely(!p))
4551                         return -EIO;
4552                 xdr_decode_hyper(p, res);
4553         }
4554         return 0;
4555 }
4556
4557 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4558                                         struct nfs4_threshold *res)
4559 {
4560         __be32 *p;
4561         unsigned int savep;
4562         uint32_t bitmap[3] = {0,}, attrlen;
4563         int status;
4564
4565         /* layout type */
4566         p = xdr_inline_decode(xdr, 4);
4567         if (unlikely(!p))
4568                 return -EIO;
4569         res->l_type = be32_to_cpup(p);
4570
4571         /* thi_hintset bitmap */
4572         status = decode_attr_bitmap(xdr, bitmap);
4573         if (status < 0)
4574                 goto xdr_error;
4575
4576         /* thi_hintlist length */
4577         status = decode_attr_length(xdr, &attrlen, &savep);
4578         if (status < 0)
4579                 goto xdr_error;
4580         /* thi_hintlist */
4581         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4582         if (status < 0)
4583                 goto xdr_error;
4584         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4585         if (status < 0)
4586                 goto xdr_error;
4587         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4588                                        THRESHOLD_RD_IO);
4589         if (status < 0)
4590                 goto xdr_error;
4591         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4592                                        THRESHOLD_WR_IO);
4593         if (status < 0)
4594                 goto xdr_error;
4595
4596         status = verify_attr_len(xdr, savep, attrlen);
4597         res->bm = bitmap[0];
4598
4599         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4600                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4601                 res->wr_io_sz);
4602 xdr_error:
4603         dprintk("%s ret=%d!\n", __func__, status);
4604         return status;
4605 }
4606
4607 /*
4608  * Thresholds on pNFS direct I/O vrs MDS I/O
4609  */
4610 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4611                                     uint32_t *bitmap,
4612                                     struct nfs4_threshold *res)
4613 {
4614         __be32 *p;
4615         int status = 0;
4616         uint32_t num;
4617
4618         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4619                 return -EIO;
4620         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4621                 /* Did the server return an unrequested attribute? */
4622                 if (unlikely(res == NULL))
4623                         return -EREMOTEIO;
4624                 p = xdr_inline_decode(xdr, 4);
4625                 if (unlikely(!p))
4626                         return -EIO;
4627                 num = be32_to_cpup(p);
4628                 if (num == 0)
4629                         return 0;
4630                 if (num > 1)
4631                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4632                                 "drivers per filesystem not supported\n",
4633                                 __func__);
4634
4635                 status = decode_first_threshold_item4(xdr, res);
4636                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4637         }
4638         return status;
4639 }
4640
4641 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4642                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4643                 struct nfs4_fs_locations *fs_loc, const struct nfs_server *server)
4644 {
4645         int status;
4646         umode_t fmode = 0;
4647         uint32_t type;
4648         int32_t err;
4649
4650         status = decode_attr_type(xdr, bitmap, &type);
4651         if (status < 0)
4652                 goto xdr_error;
4653         fattr->mode = 0;
4654         if (status != 0) {
4655                 fattr->mode |= nfs_type2fmt[type];
4656                 fattr->valid |= status;
4657         }
4658
4659         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4660         if (status < 0)
4661                 goto xdr_error;
4662         fattr->valid |= status;
4663
4664         status = decode_attr_size(xdr, bitmap, &fattr->size);
4665         if (status < 0)
4666                 goto xdr_error;
4667         fattr->valid |= status;
4668
4669         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4670         if (status < 0)
4671                 goto xdr_error;
4672         fattr->valid |= status;
4673
4674         err = 0;
4675         status = decode_attr_error(xdr, bitmap, &err);
4676         if (status < 0)
4677                 goto xdr_error;
4678
4679         status = decode_attr_filehandle(xdr, bitmap, fh);
4680         if (status < 0)
4681                 goto xdr_error;
4682
4683         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4684         if (status < 0)
4685                 goto xdr_error;
4686         fattr->valid |= status;
4687
4688         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4689         if (status < 0)
4690                 goto xdr_error;
4691         fattr->valid |= status;
4692
4693         status = -EIO;
4694         if (unlikely(bitmap[0]))
4695                 goto xdr_error;
4696
4697         status = decode_attr_mode(xdr, bitmap, &fmode);
4698         if (status < 0)
4699                 goto xdr_error;
4700         if (status != 0) {
4701                 fattr->mode |= fmode;
4702                 fattr->valid |= status;
4703         }
4704
4705         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4706         if (status < 0)
4707                 goto xdr_error;
4708         fattr->valid |= status;
4709
4710         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4711         if (status < 0)
4712                 goto xdr_error;
4713         fattr->valid |= status;
4714
4715         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4716         if (status < 0)
4717                 goto xdr_error;
4718         fattr->valid |= status;
4719
4720         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4721         if (status < 0)
4722                 goto xdr_error;
4723         fattr->valid |= status;
4724
4725         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4726         if (status < 0)
4727                 goto xdr_error;
4728         fattr->valid |= status;
4729
4730         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4731         if (status < 0)
4732                 goto xdr_error;
4733         fattr->valid |= status;
4734
4735         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4736         if (status < 0)
4737                 goto xdr_error;
4738         fattr->valid |= status;
4739
4740         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4741         if (status < 0)
4742                 goto xdr_error;
4743         fattr->valid |= status;
4744
4745         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4746         if (status < 0)
4747                 goto xdr_error;
4748         fattr->valid |= status;
4749
4750         status = -EIO;
4751         if (unlikely(bitmap[1]))
4752                 goto xdr_error;
4753
4754         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4755         if (status < 0)
4756                 goto xdr_error;
4757
4758         if (fattr->label) {
4759                 status = decode_attr_security_label(xdr, bitmap, fattr->label);
4760                 if (status < 0)
4761                         goto xdr_error;
4762                 fattr->valid |= status;
4763         }
4764
4765 xdr_error:
4766         dprintk("%s: xdr returned %d\n", __func__, -status);
4767         return status;
4768 }
4769
4770 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4771                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4772                 const struct nfs_server *server)
4773 {
4774         unsigned int savep;
4775         uint32_t attrlen,
4776                  bitmap[3] = {0};
4777         int status;
4778
4779         status = decode_op_hdr(xdr, OP_GETATTR);
4780         if (status < 0)
4781                 goto xdr_error;
4782
4783         status = decode_attr_bitmap(xdr, bitmap);
4784         if (status < 0)
4785                 goto xdr_error;
4786
4787         status = decode_attr_length(xdr, &attrlen, &savep);
4788         if (status < 0)
4789                 goto xdr_error;
4790
4791         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4792         if (status < 0)
4793                 goto xdr_error;
4794
4795         status = verify_attr_len(xdr, savep, attrlen);
4796 xdr_error:
4797         dprintk("%s: xdr returned %d\n", __func__, -status);
4798         return status;
4799 }
4800
4801 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4802                 const struct nfs_server *server)
4803 {
4804         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4805 }
4806
4807 /*
4808  * Decode potentially multiple layout types.
4809  */
4810 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4811                                     struct nfs_fsinfo *fsinfo)
4812 {
4813         __be32 *p;
4814         uint32_t i;
4815
4816         p = xdr_inline_decode(xdr, 4);
4817         if (unlikely(!p))
4818                 return -EIO;
4819         fsinfo->nlayouttypes = be32_to_cpup(p);
4820
4821         /* pNFS is not supported by the underlying file system */
4822         if (fsinfo->nlayouttypes == 0)
4823                 return 0;
4824
4825         /* Decode and set first layout type, move xdr->p past unused types */
4826         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4827         if (unlikely(!p))
4828                 return -EIO;
4829
4830         /* If we get too many, then just cap it at the max */
4831         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4832                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4833                         __func__, fsinfo->nlayouttypes);
4834                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4835         }
4836
4837         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4838                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4839         return 0;
4840 }
4841
4842 /*
4843  * The type of file system exported.
4844  * Note we must ensure that layouttype is set in any non-error case.
4845  */
4846 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4847                                 struct nfs_fsinfo *fsinfo)
4848 {
4849         int status = 0;
4850
4851         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4852         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4853                 return -EIO;
4854         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4855                 status = decode_pnfs_layout_types(xdr, fsinfo);
4856                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4857         }
4858         return status;
4859 }
4860
4861 /*
4862  * The prefered block size for layout directed io
4863  */
4864 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4865                                       uint32_t *res)
4866 {
4867         __be32 *p;
4868
4869         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4870         *res = 0;
4871         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4872                 p = xdr_inline_decode(xdr, 4);
4873                 if (unlikely(!p))
4874                         return -EIO;
4875                 *res = be32_to_cpup(p);
4876                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4877         }
4878         return 0;
4879 }
4880
4881 /*
4882  * The granularity of a CLONE operation.
4883  */
4884 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4885                                      uint32_t *res)
4886 {
4887         __be32 *p;
4888
4889         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4890         *res = 0;
4891         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4892                 p = xdr_inline_decode(xdr, 4);
4893                 if (unlikely(!p))
4894                         return -EIO;
4895                 *res = be32_to_cpup(p);
4896                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4897         }
4898         return 0;
4899 }
4900
4901 static int decode_attr_change_attr_type(struct xdr_stream *xdr,
4902                                         uint32_t *bitmap,
4903                                         enum nfs4_change_attr_type *res)
4904 {
4905         u32 tmp = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4906
4907         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4908         if (bitmap[2] & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
4909                 if (xdr_stream_decode_u32(xdr, &tmp))
4910                         return -EIO;
4911                 bitmap[2] &= ~FATTR4_WORD2_CHANGE_ATTR_TYPE;
4912         }
4913
4914         switch(tmp) {
4915         case NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR:
4916         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER:
4917         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS:
4918         case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
4919                 *res = tmp;
4920                 break;
4921         default:
4922                 *res = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4923         }
4924         return 0;
4925 }
4926
4927 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4928 {
4929         unsigned int savep;
4930         uint32_t attrlen, bitmap[3];
4931         int status;
4932
4933         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4934                 goto xdr_error;
4935         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4936                 goto xdr_error;
4937         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4938                 goto xdr_error;
4939
4940         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4941
4942         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4943                 goto xdr_error;
4944         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4945                 goto xdr_error;
4946         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4947                 goto xdr_error;
4948         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4949         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4950                 goto xdr_error;
4951         fsinfo->wtpref = fsinfo->wtmax;
4952
4953         status = -EIO;
4954         if (unlikely(bitmap[0]))
4955                 goto xdr_error;
4956
4957         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4958         if (status != 0)
4959                 goto xdr_error;
4960         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4961         if (status != 0)
4962                 goto xdr_error;
4963
4964         status = -EIO;
4965         if (unlikely(bitmap[1]))
4966                 goto xdr_error;
4967
4968         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4969         if (status)
4970                 goto xdr_error;
4971         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4972         if (status)
4973                 goto xdr_error;
4974
4975         status = decode_attr_change_attr_type(xdr, bitmap,
4976                                               &fsinfo->change_attr_type);
4977         if (status)
4978                 goto xdr_error;
4979
4980         status = decode_attr_xattrsupport(xdr, bitmap,
4981                                           &fsinfo->xattr_support);
4982         if (status)
4983                 goto xdr_error;
4984
4985         status = verify_attr_len(xdr, savep, attrlen);
4986 xdr_error:
4987         dprintk("%s: xdr returned %d!\n", __func__, -status);
4988         return status;
4989 }
4990
4991 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4992 {
4993         __be32 *p;
4994         uint32_t len;
4995         int status;
4996
4997         /* Zero handle first to allow comparisons */
4998         memset(fh, 0, sizeof(*fh));
4999
5000         status = decode_op_hdr(xdr, OP_GETFH);
5001         if (status)
5002                 return status;
5003
5004         p = xdr_inline_decode(xdr, 4);
5005         if (unlikely(!p))
5006                 return -EIO;
5007         len = be32_to_cpup(p);
5008         if (len > NFS4_FHSIZE || len == 0) {
5009                 trace_nfs4_xdr_bad_filehandle(xdr, OP_GETFH, NFS4ERR_BADHANDLE);
5010                 return -EREMOTEIO;
5011         }
5012         fh->size = len;
5013         p = xdr_inline_decode(xdr, len);
5014         if (unlikely(!p))
5015                 return -EIO;
5016         memcpy(fh->data, p, len);
5017         return 0;
5018 }
5019
5020 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5021 {
5022         int status;
5023
5024         status = decode_op_hdr(xdr, OP_LINK);
5025         if (status)
5026                 return status;
5027         return decode_change_info(xdr, cinfo);
5028 }
5029
5030 /*
5031  * We create the owner, so we know a proper owner.id length is 4.
5032  */
5033 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5034 {
5035         uint64_t offset, length, clientid;
5036         __be32 *p;
5037         uint32_t namelen, type;
5038
5039         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5040         if (unlikely(!p))
5041                 return -EIO;
5042         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5043         p = xdr_decode_hyper(p, &length);
5044         type = be32_to_cpup(p++); /* 4 byte read */
5045         if (fl != NULL) { /* manipulate file lock */
5046                 fl->fl_start = (loff_t)offset;
5047                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5048                 if (length == ~(uint64_t)0)
5049                         fl->fl_end = OFFSET_MAX;
5050                 fl->fl_type = F_WRLCK;
5051                 if (type & 1)
5052                         fl->fl_type = F_RDLCK;
5053                 fl->fl_pid = 0;
5054         }
5055         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5056         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5057         p = xdr_inline_decode(xdr, namelen); /* variable size field */
5058         if (likely(!p))
5059                 return -EIO;
5060         return -NFS4ERR_DENIED;
5061 }
5062
5063 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5064 {
5065         int status;
5066
5067         status = decode_op_hdr(xdr, OP_LOCK);
5068         if (status == -EIO)
5069                 goto out;
5070         if (status == 0) {
5071                 status = decode_lock_stateid(xdr, &res->stateid);
5072                 if (unlikely(status))
5073                         goto out;
5074         } else if (status == -NFS4ERR_DENIED)
5075                 status = decode_lock_denied(xdr, NULL);
5076         if (res->open_seqid != NULL)
5077                 nfs_increment_open_seqid(status, res->open_seqid);
5078         nfs_increment_lock_seqid(status, res->lock_seqid);
5079 out:
5080         return status;
5081 }
5082
5083 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5084 {
5085         int status;
5086         status = decode_op_hdr(xdr, OP_LOCKT);
5087         if (status == -NFS4ERR_DENIED)
5088                 return decode_lock_denied(xdr, res->denied);
5089         return status;
5090 }
5091
5092 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5093 {
5094         int status;
5095
5096         status = decode_op_hdr(xdr, OP_LOCKU);
5097         if (status != -EIO)
5098                 nfs_increment_lock_seqid(status, res->seqid);
5099         if (status == 0)
5100                 status = decode_lock_stateid(xdr, &res->stateid);
5101         return status;
5102 }
5103
5104 static int decode_release_lockowner(struct xdr_stream *xdr)
5105 {
5106         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5107 }
5108
5109 static int decode_lookup(struct xdr_stream *xdr)
5110 {
5111         return decode_op_hdr(xdr, OP_LOOKUP);
5112 }
5113
5114 static int decode_lookupp(struct xdr_stream *xdr)
5115 {
5116         return decode_op_hdr(xdr, OP_LOOKUPP);
5117 }
5118
5119 /* This is too sick! */
5120 static int decode_space_limit(struct xdr_stream *xdr,
5121                 unsigned long *pagemod_limit)
5122 {
5123         __be32 *p;
5124         uint32_t limit_type, nblocks, blocksize;
5125         u64 maxsize = 0;
5126
5127         p = xdr_inline_decode(xdr, 12);
5128         if (unlikely(!p))
5129                 return -EIO;
5130         limit_type = be32_to_cpup(p++);
5131         switch (limit_type) {
5132         case NFS4_LIMIT_SIZE:
5133                 xdr_decode_hyper(p, &maxsize);
5134                 break;
5135         case NFS4_LIMIT_BLOCKS:
5136                 nblocks = be32_to_cpup(p++);
5137                 blocksize = be32_to_cpup(p);
5138                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5139         }
5140         maxsize >>= PAGE_SHIFT;
5141         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5142         return 0;
5143 }
5144
5145 static int decode_rw_delegation(struct xdr_stream *xdr,
5146                 uint32_t delegation_type,
5147                 struct nfs_openres *res)
5148 {
5149         __be32 *p;
5150         int status;
5151
5152         status = decode_delegation_stateid(xdr, &res->delegation);
5153         if (unlikely(status))
5154                 return status;
5155         p = xdr_inline_decode(xdr, 4);
5156         if (unlikely(!p))
5157                 return -EIO;
5158         res->do_recall = be32_to_cpup(p);
5159
5160         switch (delegation_type) {
5161         case NFS4_OPEN_DELEGATE_READ:
5162                 res->delegation_type = FMODE_READ;
5163                 break;
5164         case NFS4_OPEN_DELEGATE_WRITE:
5165                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5166                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5167                                 return -EIO;
5168         }
5169         return decode_ace(xdr, NULL);
5170 }
5171
5172 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5173 {
5174         __be32 *p;
5175         uint32_t why_no_delegation;
5176
5177         p = xdr_inline_decode(xdr, 4);
5178         if (unlikely(!p))
5179                 return -EIO;
5180         why_no_delegation = be32_to_cpup(p);
5181         switch (why_no_delegation) {
5182                 case WND4_CONTENTION:
5183                 case WND4_RESOURCE:
5184                         xdr_inline_decode(xdr, 4);
5185                         /* Ignore for now */
5186         }
5187         return 0;
5188 }
5189
5190 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5191 {
5192         __be32 *p;
5193         uint32_t delegation_type;
5194
5195         p = xdr_inline_decode(xdr, 4);
5196         if (unlikely(!p))
5197                 return -EIO;
5198         delegation_type = be32_to_cpup(p);
5199         res->delegation_type = 0;
5200         switch (delegation_type) {
5201         case NFS4_OPEN_DELEGATE_NONE:
5202                 return 0;
5203         case NFS4_OPEN_DELEGATE_READ:
5204         case NFS4_OPEN_DELEGATE_WRITE:
5205                 return decode_rw_delegation(xdr, delegation_type, res);
5206         case NFS4_OPEN_DELEGATE_NONE_EXT:
5207                 return decode_no_delegation(xdr, res);
5208         }
5209         return -EIO;
5210 }
5211
5212 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5213 {
5214         __be32 *p;
5215         uint32_t savewords, bmlen, i;
5216         int status;
5217
5218         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5219                 return status;
5220         nfs_increment_open_seqid(status, res->seqid);
5221         if (status)
5222                 return status;
5223         status = decode_open_stateid(xdr, &res->stateid);
5224         if (unlikely(status))
5225                 return status;
5226
5227         decode_change_info(xdr, &res->cinfo);
5228
5229         p = xdr_inline_decode(xdr, 8);
5230         if (unlikely(!p))
5231                 return -EIO;
5232         res->rflags = be32_to_cpup(p++);
5233         bmlen = be32_to_cpup(p);
5234         if (bmlen > 10)
5235                 goto xdr_error;
5236
5237         p = xdr_inline_decode(xdr, bmlen << 2);
5238         if (unlikely(!p))
5239                 return -EIO;
5240         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5241         for (i = 0; i < savewords; ++i)
5242                 res->attrset[i] = be32_to_cpup(p++);
5243         for (; i < NFS4_BITMAP_SIZE; i++)
5244                 res->attrset[i] = 0;
5245
5246         return decode_delegation(xdr, res);
5247 xdr_error:
5248         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5249         return -EIO;
5250 }
5251
5252 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5253 {
5254         int status;
5255
5256         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5257         if (status != -EIO)
5258                 nfs_increment_open_seqid(status, res->seqid);
5259         if (!status)
5260                 status = decode_open_stateid(xdr, &res->stateid);
5261         return status;
5262 }
5263
5264 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5265 {
5266         int status;
5267
5268         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5269         if (status != -EIO)
5270                 nfs_increment_open_seqid(status, res->seqid);
5271         if (!status)
5272                 status = decode_open_stateid(xdr, &res->stateid);
5273         return status;
5274 }
5275
5276 static int decode_putfh(struct xdr_stream *xdr)
5277 {
5278         return decode_op_hdr(xdr, OP_PUTFH);
5279 }
5280
5281 static int decode_putrootfh(struct xdr_stream *xdr)
5282 {
5283         return decode_op_hdr(xdr, OP_PUTROOTFH);
5284 }
5285
5286 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5287                        struct nfs_pgio_res *res)
5288 {
5289         __be32 *p;
5290         uint32_t count, eof, recvd;
5291         int status;
5292
5293         status = decode_op_hdr(xdr, OP_READ);
5294         if (status)
5295                 return status;
5296         p = xdr_inline_decode(xdr, 8);
5297         if (unlikely(!p))
5298                 return -EIO;
5299         eof = be32_to_cpup(p++);
5300         count = be32_to_cpup(p);
5301         recvd = xdr_read_pages(xdr, count);
5302         if (count > recvd) {
5303                 dprintk("NFS: server cheating in read reply: "
5304                                 "count %u > recvd %u\n", count, recvd);
5305                 count = recvd;
5306                 eof = 0;
5307         }
5308         res->eof = eof;
5309         res->count = count;
5310         return 0;
5311 }
5312
5313 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5314 {
5315         int             status;
5316         __be32          verf[2];
5317
5318         status = decode_op_hdr(xdr, OP_READDIR);
5319         if (!status)
5320                 status = decode_verifier(xdr, readdir->verifier.data);
5321         if (unlikely(status))
5322                 return status;
5323         memcpy(verf, readdir->verifier.data, sizeof(verf));
5324         dprintk("%s: verifier = %08x:%08x\n",
5325                         __func__, verf[0], verf[1]);
5326         return xdr_read_pages(xdr, xdr->buf->page_len);
5327 }
5328
5329 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5330 {
5331         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5332         u32 len, recvd;
5333         __be32 *p;
5334         int status;
5335
5336         status = decode_op_hdr(xdr, OP_READLINK);
5337         if (status)
5338                 return status;
5339
5340         /* Convert length of symlink */
5341         p = xdr_inline_decode(xdr, 4);
5342         if (unlikely(!p))
5343                 return -EIO;
5344         len = be32_to_cpup(p);
5345         if (len >= rcvbuf->page_len || len <= 0) {
5346                 dprintk("nfs: server returned giant symlink!\n");
5347                 return -ENAMETOOLONG;
5348         }
5349         recvd = xdr_read_pages(xdr, len);
5350         if (recvd < len) {
5351                 dprintk("NFS: server cheating in readlink reply: "
5352                                 "count %u > recvd %u\n", len, recvd);
5353                 return -EIO;
5354         }
5355         /*
5356          * The XDR encode routine has set things up so that
5357          * the link text will be copied directly into the
5358          * buffer.  We just have to do overflow-checking,
5359          * and null-terminate the text (the VFS expects
5360          * null-termination).
5361          */
5362         xdr_terminate_string(rcvbuf, len);
5363         return 0;
5364 }
5365
5366 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5367 {
5368         int status;
5369
5370         status = decode_op_hdr(xdr, OP_REMOVE);
5371         if (status)
5372                 goto out;
5373         status = decode_change_info(xdr, cinfo);
5374 out:
5375         return status;
5376 }
5377
5378 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5379               struct nfs4_change_info *new_cinfo)
5380 {
5381         int status;
5382
5383         status = decode_op_hdr(xdr, OP_RENAME);
5384         if (status)
5385                 goto out;
5386         if ((status = decode_change_info(xdr, old_cinfo)))
5387                 goto out;
5388         status = decode_change_info(xdr, new_cinfo);
5389 out:
5390         return status;
5391 }
5392
5393 static int decode_renew(struct xdr_stream *xdr)
5394 {
5395         return decode_op_hdr(xdr, OP_RENEW);
5396 }
5397
5398 static int
5399 decode_restorefh(struct xdr_stream *xdr)
5400 {
5401         return decode_op_hdr(xdr, OP_RESTOREFH);
5402 }
5403
5404 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5405                          struct nfs_getaclres *res, enum nfs4_acl_type type)
5406 {
5407         unsigned int savep;
5408         uint32_t attrlen,
5409                  bitmap[3] = {0};
5410         int status;
5411
5412         res->acl_len = 0;
5413         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5414                 goto out;
5415
5416         xdr_enter_page(xdr, xdr->buf->page_len);
5417
5418         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5419                 goto out;
5420         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5421                 goto out;
5422
5423         switch (type) {
5424         default:
5425                 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5426                         return -EIO;
5427                 if (!(bitmap[0] & FATTR4_WORD0_ACL))
5428                         return -EOPNOTSUPP;
5429                 break;
5430         case NFS4ACL_DACL:
5431                 if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_DACL - 1U)))
5432                         return -EIO;
5433                 if (!(bitmap[1] & FATTR4_WORD1_DACL))
5434                         return -EOPNOTSUPP;
5435                 break;
5436         case NFS4ACL_SACL:
5437                 if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_SACL - 1U)))
5438                         return -EIO;
5439                 if (!(bitmap[1] & FATTR4_WORD1_SACL))
5440                         return -EOPNOTSUPP;
5441         }
5442
5443         /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5444          * are stored with the acl data to handle the problem of
5445          * variable length bitmaps.*/
5446         res->acl_data_offset = xdr_page_pos(xdr);
5447         res->acl_len = attrlen;
5448
5449         /* Check for receive buffer overflow */
5450         if (res->acl_len > xdr_stream_remaining(xdr) ||
5451             res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5452                 res->acl_flags |= NFS4_ACL_TRUNC;
5453                 dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5454                         attrlen, xdr_stream_remaining(xdr));
5455         }
5456 out:
5457         return status;
5458 }
5459
5460 static int
5461 decode_savefh(struct xdr_stream *xdr)
5462 {
5463         return decode_op_hdr(xdr, OP_SAVEFH);
5464 }
5465
5466 static int decode_setattr(struct xdr_stream *xdr)
5467 {
5468         int status;
5469
5470         status = decode_op_hdr(xdr, OP_SETATTR);
5471         if (status)
5472                 return status;
5473         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5474                 return 0;
5475         return -EIO;
5476 }
5477
5478 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5479 {
5480         __be32 *p;
5481         uint32_t opnum;
5482         int32_t nfserr;
5483
5484         p = xdr_inline_decode(xdr, 8);
5485         if (unlikely(!p))
5486                 return -EIO;
5487         opnum = be32_to_cpup(p++);
5488         if (opnum != OP_SETCLIENTID) {
5489                 dprintk("nfs: decode_setclientid: Server returned operation"
5490                         " %d\n", opnum);
5491                 return -EIO;
5492         }
5493         nfserr = be32_to_cpup(p);
5494         if (nfserr == NFS_OK) {
5495                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5496                 if (unlikely(!p))
5497                         return -EIO;
5498                 p = xdr_decode_hyper(p, &res->clientid);
5499                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5500         } else if (nfserr == NFSERR_CLID_INUSE) {
5501                 uint32_t len;
5502
5503                 /* skip netid string */
5504                 p = xdr_inline_decode(xdr, 4);
5505                 if (unlikely(!p))
5506                         return -EIO;
5507                 len = be32_to_cpup(p);
5508                 p = xdr_inline_decode(xdr, len);
5509                 if (unlikely(!p))
5510                         return -EIO;
5511
5512                 /* skip uaddr string */
5513                 p = xdr_inline_decode(xdr, 4);
5514                 if (unlikely(!p))
5515                         return -EIO;
5516                 len = be32_to_cpup(p);
5517                 p = xdr_inline_decode(xdr, len);
5518                 if (unlikely(!p))
5519                         return -EIO;
5520                 return -NFSERR_CLID_INUSE;
5521         } else
5522                 return nfs4_stat_to_errno(nfserr);
5523
5524         return 0;
5525 }
5526
5527 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5528 {
5529         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5530 }
5531
5532 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5533 {
5534         __be32 *p;
5535         int status;
5536
5537         status = decode_op_hdr(xdr, OP_WRITE);
5538         if (status)
5539                 return status;
5540
5541         p = xdr_inline_decode(xdr, 8);
5542         if (unlikely(!p))
5543                 return -EIO;
5544         res->count = be32_to_cpup(p++);
5545         res->verf->committed = be32_to_cpup(p++);
5546         return decode_write_verifier(xdr, &res->verf->verifier);
5547 }
5548
5549 static int decode_delegreturn(struct xdr_stream *xdr)
5550 {
5551         return decode_op_hdr(xdr, OP_DELEGRETURN);
5552 }
5553
5554 static int decode_secinfo_gss(struct xdr_stream *xdr,
5555                               struct nfs4_secinfo4 *flavor)
5556 {
5557         u32 oid_len;
5558         __be32 *p;
5559
5560         p = xdr_inline_decode(xdr, 4);
5561         if (unlikely(!p))
5562                 return -EIO;
5563         oid_len = be32_to_cpup(p);
5564         if (oid_len > GSS_OID_MAX_LEN)
5565                 return -EINVAL;
5566
5567         p = xdr_inline_decode(xdr, oid_len);
5568         if (unlikely(!p))
5569                 return -EIO;
5570         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5571         flavor->flavor_info.oid.len = oid_len;
5572
5573         p = xdr_inline_decode(xdr, 8);
5574         if (unlikely(!p))
5575                 return -EIO;
5576         flavor->flavor_info.qop = be32_to_cpup(p++);
5577         flavor->flavor_info.service = be32_to_cpup(p);
5578
5579         return 0;
5580 }
5581
5582 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5583 {
5584         struct nfs4_secinfo4 *sec_flavor;
5585         unsigned int i, num_flavors;
5586         int status;
5587         __be32 *p;
5588
5589         p = xdr_inline_decode(xdr, 4);
5590         if (unlikely(!p))
5591                 return -EIO;
5592
5593         res->flavors->num_flavors = 0;
5594         num_flavors = be32_to_cpup(p);
5595
5596         for (i = 0; i < num_flavors; i++) {
5597                 sec_flavor = &res->flavors->flavors[i];
5598                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5599                         break;
5600
5601                 p = xdr_inline_decode(xdr, 4);
5602                 if (unlikely(!p))
5603                         return -EIO;
5604                 sec_flavor->flavor = be32_to_cpup(p);
5605
5606                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5607                         status = decode_secinfo_gss(xdr, sec_flavor);
5608                         if (status)
5609                                 goto out;
5610                 }
5611                 res->flavors->num_flavors++;
5612         }
5613
5614         status = 0;
5615 out:
5616         return status;
5617 }
5618
5619 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5620 {
5621         int status = decode_op_hdr(xdr, OP_SECINFO);
5622         if (status)
5623                 return status;
5624         return decode_secinfo_common(xdr, res);
5625 }
5626
5627 #if defined(CONFIG_NFS_V4_1)
5628 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5629 {
5630         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5631         if (status)
5632                 return status;
5633         return decode_secinfo_common(xdr, res);
5634 }
5635
5636 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5637 {
5638         if (xdr_stream_decode_uint32_array(xdr, op_map->u.words,
5639                                            ARRAY_SIZE(op_map->u.words)) < 0)
5640                 return -EIO;
5641         return 0;
5642 }
5643
5644 static int decode_exchange_id(struct xdr_stream *xdr,
5645                               struct nfs41_exchange_id_res *res)
5646 {
5647         __be32 *p;
5648         uint32_t dummy;
5649         char *dummy_str;
5650         int status;
5651         uint32_t impl_id_count;
5652
5653         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5654         if (status)
5655                 return status;
5656
5657         p = xdr_inline_decode(xdr, 8);
5658         if (unlikely(!p))
5659                 return -EIO;
5660         xdr_decode_hyper(p, &res->clientid);
5661         p = xdr_inline_decode(xdr, 12);
5662         if (unlikely(!p))
5663                 return -EIO;
5664         res->seqid = be32_to_cpup(p++);
5665         res->flags = be32_to_cpup(p++);
5666
5667         res->state_protect.how = be32_to_cpup(p);
5668         switch (res->state_protect.how) {
5669         case SP4_NONE:
5670                 break;
5671         case SP4_MACH_CRED:
5672                 status = decode_op_map(xdr, &res->state_protect.enforce);
5673                 if (status)
5674                         return status;
5675                 status = decode_op_map(xdr, &res->state_protect.allow);
5676                 if (status)
5677                         return status;
5678                 break;
5679         default:
5680                 WARN_ON_ONCE(1);
5681                 return -EIO;
5682         }
5683
5684         /* server_owner4.so_minor_id */
5685         p = xdr_inline_decode(xdr, 8);
5686         if (unlikely(!p))
5687                 return -EIO;
5688         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5689
5690         /* server_owner4.so_major_id */
5691         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5692         if (unlikely(status))
5693                 return status;
5694         memcpy(res->server_owner->major_id, dummy_str, dummy);
5695         res->server_owner->major_id_sz = dummy;
5696
5697         /* server_scope4 */
5698         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5699         if (unlikely(status))
5700                 return status;
5701         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5702         res->server_scope->server_scope_sz = dummy;
5703
5704         /* Implementation Id */
5705         p = xdr_inline_decode(xdr, 4);
5706         if (unlikely(!p))
5707                 return -EIO;
5708         impl_id_count = be32_to_cpup(p++);
5709
5710         if (impl_id_count) {
5711                 /* nii_domain */
5712                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5713                 if (unlikely(status))
5714                         return status;
5715                 memcpy(res->impl_id->domain, dummy_str, dummy);
5716
5717                 /* nii_name */
5718                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5719                 if (unlikely(status))
5720                         return status;
5721                 memcpy(res->impl_id->name, dummy_str, dummy);
5722
5723                 /* nii_date */
5724                 p = xdr_inline_decode(xdr, 12);
5725                 if (unlikely(!p))
5726                         return -EIO;
5727                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5728                 res->impl_id->date.nseconds = be32_to_cpup(p);
5729
5730                 /* if there's more than one entry, ignore the rest */
5731         }
5732         return 0;
5733 }
5734
5735 static int decode_chan_attrs(struct xdr_stream *xdr,
5736                              struct nfs4_channel_attrs *attrs)
5737 {
5738         __be32 *p;
5739         u32 nr_attrs, val;
5740
5741         p = xdr_inline_decode(xdr, 28);
5742         if (unlikely(!p))
5743                 return -EIO;
5744         val = be32_to_cpup(p++);        /* headerpadsz */
5745         if (val)
5746                 return -EINVAL;         /* no support for header padding yet */
5747         attrs->max_rqst_sz = be32_to_cpup(p++);
5748         attrs->max_resp_sz = be32_to_cpup(p++);
5749         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5750         attrs->max_ops = be32_to_cpup(p++);
5751         attrs->max_reqs = be32_to_cpup(p++);
5752         nr_attrs = be32_to_cpup(p);
5753         if (unlikely(nr_attrs > 1)) {
5754                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5755                         "count %u\n", __func__, nr_attrs);
5756                 return -EINVAL;
5757         }
5758         if (nr_attrs == 1) {
5759                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5760                 if (unlikely(!p))
5761                         return -EIO;
5762         }
5763         return 0;
5764 }
5765
5766 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5767 {
5768         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5769 }
5770
5771 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5772                                 struct nfs41_bind_conn_to_session_res *res)
5773 {
5774         __be32 *p;
5775         int status;
5776
5777         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5778         if (!status)
5779                 status = decode_sessionid(xdr, &res->sessionid);
5780         if (unlikely(status))
5781                 return status;
5782
5783         /* dir flags, rdma mode bool */
5784         p = xdr_inline_decode(xdr, 8);
5785         if (unlikely(!p))
5786                 return -EIO;
5787
5788         res->dir = be32_to_cpup(p++);
5789         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5790                 return -EIO;
5791         if (be32_to_cpup(p) == 0)
5792                 res->use_conn_in_rdma_mode = false;
5793         else
5794                 res->use_conn_in_rdma_mode = true;
5795
5796         return 0;
5797 }
5798
5799 static int decode_create_session(struct xdr_stream *xdr,
5800                                  struct nfs41_create_session_res *res)
5801 {
5802         __be32 *p;
5803         int status;
5804
5805         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5806         if (!status)
5807                 status = decode_sessionid(xdr, &res->sessionid);
5808         if (unlikely(status))
5809                 return status;
5810
5811         /* seqid, flags */
5812         p = xdr_inline_decode(xdr, 8);
5813         if (unlikely(!p))
5814                 return -EIO;
5815         res->seqid = be32_to_cpup(p++);
5816         res->flags = be32_to_cpup(p);
5817
5818         /* Channel attributes */
5819         status = decode_chan_attrs(xdr, &res->fc_attrs);
5820         if (!status)
5821                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5822         return status;
5823 }
5824
5825 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5826 {
5827         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5828 }
5829
5830 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5831 {
5832         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5833 }
5834
5835 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5836 {
5837         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5838 }
5839 #endif /* CONFIG_NFS_V4_1 */
5840
5841 static int decode_sequence(struct xdr_stream *xdr,
5842                            struct nfs4_sequence_res *res,
5843                            struct rpc_rqst *rqstp)
5844 {
5845 #if defined(CONFIG_NFS_V4_1)
5846         struct nfs4_session *session;
5847         struct nfs4_sessionid id;
5848         u32 dummy;
5849         int status;
5850         __be32 *p;
5851
5852         if (res->sr_slot == NULL)
5853                 return 0;
5854         if (!res->sr_slot->table->session)
5855                 return 0;
5856
5857         status = decode_op_hdr(xdr, OP_SEQUENCE);
5858         if (!status)
5859                 status = decode_sessionid(xdr, &id);
5860         if (unlikely(status))
5861                 goto out_err;
5862
5863         /*
5864          * If the server returns different values for sessionID, slotID or
5865          * sequence number, the server is looney tunes.
5866          */
5867         status = -EREMOTEIO;
5868         session = res->sr_slot->table->session;
5869
5870         if (memcmp(id.data, session->sess_id.data,
5871                    NFS4_MAX_SESSIONID_LEN)) {
5872                 dprintk("%s Invalid session id\n", __func__);
5873                 goto out_err;
5874         }
5875
5876         p = xdr_inline_decode(xdr, 20);
5877         if (unlikely(!p))
5878                 goto out_overflow;
5879
5880         /* seqid */
5881         dummy = be32_to_cpup(p++);
5882         if (dummy != res->sr_slot->seq_nr) {
5883                 dprintk("%s Invalid sequence number\n", __func__);
5884                 goto out_err;
5885         }
5886         /* slot id */
5887         dummy = be32_to_cpup(p++);
5888         if (dummy != res->sr_slot->slot_nr) {
5889                 dprintk("%s Invalid slot id\n", __func__);
5890                 goto out_err;
5891         }
5892         /* highest slot id */
5893         res->sr_highest_slotid = be32_to_cpup(p++);
5894         /* target highest slot id */
5895         res->sr_target_highest_slotid = be32_to_cpup(p++);
5896         /* result flags */
5897         res->sr_status_flags = be32_to_cpup(p);
5898         status = 0;
5899 out_err:
5900         res->sr_status = status;
5901         return status;
5902 out_overflow:
5903         status = -EIO;
5904         goto out_err;
5905 #else  /* CONFIG_NFS_V4_1 */
5906         return 0;
5907 #endif /* CONFIG_NFS_V4_1 */
5908 }
5909
5910 #if defined(CONFIG_NFS_V4_1)
5911 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5912 {
5913         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5914         return decode_stateid(xdr, stateid);
5915 }
5916
5917 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5918                                 struct nfs4_getdeviceinfo_res *res)
5919 {
5920         struct pnfs_device *pdev = res->pdev;
5921         __be32 *p;
5922         uint32_t len, type;
5923         int status;
5924
5925         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5926         if (status) {
5927                 if (status == -ETOOSMALL) {
5928                         p = xdr_inline_decode(xdr, 4);
5929                         if (unlikely(!p))
5930                                 return -EIO;
5931                         pdev->mincount = be32_to_cpup(p);
5932                         dprintk("%s: Min count too small. mincnt = %u\n",
5933                                 __func__, pdev->mincount);
5934                 }
5935                 return status;
5936         }
5937
5938         p = xdr_inline_decode(xdr, 8);
5939         if (unlikely(!p))
5940                 return -EIO;
5941         type = be32_to_cpup(p++);
5942         if (type != pdev->layout_type) {
5943                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5944                         __func__, pdev->layout_type, type);
5945                 return -EINVAL;
5946         }
5947         /*
5948          * Get the length of the opaque device_addr4. xdr_read_pages places
5949          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5950          * and places the remaining xdr data in xdr_buf->tail
5951          */
5952         pdev->mincount = be32_to_cpup(p);
5953         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5954                 return -EIO;
5955
5956         /* Parse notification bitmap, verifying that it is zero. */
5957         p = xdr_inline_decode(xdr, 4);
5958         if (unlikely(!p))
5959                 return -EIO;
5960         len = be32_to_cpup(p);
5961         if (len) {
5962                 uint32_t i;
5963
5964                 p = xdr_inline_decode(xdr, 4 * len);
5965                 if (unlikely(!p))
5966                         return -EIO;
5967
5968                 res->notification = be32_to_cpup(p++);
5969                 for (i = 1; i < len; i++) {
5970                         if (be32_to_cpup(p++)) {
5971                                 dprintk("%s: unsupported notification\n",
5972                                         __func__);
5973                                 return -EIO;
5974                         }
5975                 }
5976         }
5977         return 0;
5978 }
5979
5980 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5981                             struct nfs4_layoutget_res *res)
5982 {
5983         __be32 *p;
5984         int status;
5985         u32 layout_count;
5986         u32 recvd;
5987
5988         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5989         if (status)
5990                 goto out;
5991         p = xdr_inline_decode(xdr, 4);
5992         if (unlikely(!p))
5993                 goto out_overflow;
5994         res->return_on_close = be32_to_cpup(p);
5995         decode_layout_stateid(xdr, &res->stateid);
5996         p = xdr_inline_decode(xdr, 4);
5997         if (unlikely(!p))
5998                 goto out_overflow;
5999         layout_count = be32_to_cpup(p);
6000         if (!layout_count) {
6001                 dprintk("%s: server responded with empty layout array\n",
6002                         __func__);
6003                 status = -EINVAL;
6004                 goto out;
6005         }
6006
6007         p = xdr_inline_decode(xdr, 28);
6008         if (unlikely(!p))
6009                 goto out_overflow;
6010         p = xdr_decode_hyper(p, &res->range.offset);
6011         p = xdr_decode_hyper(p, &res->range.length);
6012         res->range.iomode = be32_to_cpup(p++);
6013         res->type = be32_to_cpup(p++);
6014         res->layoutp->len = be32_to_cpup(p);
6015
6016         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6017                 __func__,
6018                 (unsigned long)res->range.offset,
6019                 (unsigned long)res->range.length,
6020                 res->range.iomode,
6021                 res->type,
6022                 res->layoutp->len);
6023
6024         recvd = xdr_read_pages(xdr, res->layoutp->len);
6025         if (res->layoutp->len > recvd) {
6026                 dprintk("NFS: server cheating in layoutget reply: "
6027                                 "layout len %u > recvd %u\n",
6028                                 res->layoutp->len, recvd);
6029                 status = -EINVAL;
6030                 goto out;
6031         }
6032
6033         if (layout_count > 1) {
6034                 /* We only handle a length one array at the moment.  Any
6035                  * further entries are just ignored.  Note that this means
6036                  * the client may see a response that is less than the
6037                  * minimum it requested.
6038                  */
6039                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6040                         __func__, layout_count);
6041         }
6042
6043 out:
6044         res->status = status;
6045         return status;
6046 out_overflow:
6047         status = -EIO;
6048         goto out;
6049 }
6050
6051 static int decode_layoutreturn(struct xdr_stream *xdr,
6052                                struct nfs4_layoutreturn_res *res)
6053 {
6054         __be32 *p;
6055         int status;
6056
6057         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6058         if (status)
6059                 return status;
6060         p = xdr_inline_decode(xdr, 4);
6061         if (unlikely(!p))
6062                 return -EIO;
6063         res->lrs_present = be32_to_cpup(p);
6064         if (res->lrs_present)
6065                 status = decode_layout_stateid(xdr, &res->stateid);
6066         else
6067                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6068         return status;
6069 }
6070
6071 static int decode_layoutcommit(struct xdr_stream *xdr,
6072                                struct rpc_rqst *req,
6073                                struct nfs4_layoutcommit_res *res)
6074 {
6075         __be32 *p;
6076         __u32 sizechanged;
6077         int status;
6078
6079         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6080         res->status = status;
6081         if (status)
6082                 return status;
6083
6084         p = xdr_inline_decode(xdr, 4);
6085         if (unlikely(!p))
6086                 return -EIO;
6087         sizechanged = be32_to_cpup(p);
6088
6089         if (sizechanged) {
6090                 /* throw away new size */
6091                 p = xdr_inline_decode(xdr, 8);
6092                 if (unlikely(!p))
6093                         return -EIO;
6094         }
6095         return 0;
6096 }
6097
6098 static int decode_test_stateid(struct xdr_stream *xdr,
6099                                struct nfs41_test_stateid_res *res)
6100 {
6101         __be32 *p;
6102         int status;
6103         int num_res;
6104
6105         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6106         if (status)
6107                 return status;
6108
6109         p = xdr_inline_decode(xdr, 4);
6110         if (unlikely(!p))
6111                 return -EIO;
6112         num_res = be32_to_cpup(p++);
6113         if (num_res != 1)
6114                 return -EIO;
6115
6116         p = xdr_inline_decode(xdr, 4);
6117         if (unlikely(!p))
6118                 return -EIO;
6119         res->status = be32_to_cpup(p++);
6120
6121         return status;
6122 }
6123
6124 static int decode_free_stateid(struct xdr_stream *xdr,
6125                                struct nfs41_free_stateid_res *res)
6126 {
6127         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6128         return res->status;
6129 }
6130 #else
6131 static inline
6132 int decode_layoutreturn(struct xdr_stream *xdr,
6133                                struct nfs4_layoutreturn_res *res)
6134 {
6135         return 0;
6136 }
6137
6138 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6139                             struct nfs4_layoutget_res *res)
6140 {
6141         return 0;
6142 }
6143
6144 #endif /* CONFIG_NFS_V4_1 */
6145
6146 /*
6147  * END OF "GENERIC" DECODE ROUTINES.
6148  */
6149
6150 /*
6151  * Decode OPEN_DOWNGRADE response
6152  */
6153 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6154                                        struct xdr_stream *xdr,
6155                                        void *data)
6156 {
6157         struct nfs_closeres *res = data;
6158         struct compound_hdr hdr;
6159         int status;
6160
6161         status = decode_compound_hdr(xdr, &hdr);
6162         if (status)
6163                 goto out;
6164         status = decode_sequence(xdr, &res->seq_res, rqstp);
6165         if (status)
6166                 goto out;
6167         status = decode_putfh(xdr);
6168         if (status)
6169                 goto out;
6170         if (res->lr_res) {
6171                 status = decode_layoutreturn(xdr, res->lr_res);
6172                 res->lr_ret = status;
6173                 if (status)
6174                         goto out;
6175         }
6176         status = decode_open_downgrade(xdr, res);
6177 out:
6178         return status;
6179 }
6180
6181 /*
6182  * Decode ACCESS response
6183  */
6184 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6185                                void *data)
6186 {
6187         struct nfs4_accessres *res = data;
6188         struct compound_hdr hdr;
6189         int status;
6190
6191         status = decode_compound_hdr(xdr, &hdr);
6192         if (status)
6193                 goto out;
6194         status = decode_sequence(xdr, &res->seq_res, rqstp);
6195         if (status)
6196                 goto out;
6197         status = decode_putfh(xdr);
6198         if (status != 0)
6199                 goto out;
6200         status = decode_access(xdr, &res->supported, &res->access);
6201         if (status != 0)
6202                 goto out;
6203         if (res->fattr)
6204                 decode_getfattr(xdr, res->fattr, res->server);
6205 out:
6206         return status;
6207 }
6208
6209 /*
6210  * Decode LOOKUP response
6211  */
6212 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6213                                void *data)
6214 {
6215         struct nfs4_lookup_res *res = data;
6216         struct compound_hdr hdr;
6217         int status;
6218
6219         status = decode_compound_hdr(xdr, &hdr);
6220         if (status)
6221                 goto out;
6222         status = decode_sequence(xdr, &res->seq_res, rqstp);
6223         if (status)
6224                 goto out;
6225         status = decode_putfh(xdr);
6226         if (status)
6227                 goto out;
6228         status = decode_lookup(xdr);
6229         if (status)
6230                 goto out;
6231         status = decode_getfh(xdr, res->fh);
6232         if (status)
6233                 goto out;
6234         status = decode_getfattr(xdr, res->fattr, res->server);
6235 out:
6236         return status;
6237 }
6238
6239 /*
6240  * Decode LOOKUPP response
6241  */
6242 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6243                 void *data)
6244 {
6245         struct nfs4_lookupp_res *res = data;
6246         struct compound_hdr hdr;
6247         int status;
6248
6249         status = decode_compound_hdr(xdr, &hdr);
6250         if (status)
6251                 goto out;
6252         status = decode_sequence(xdr, &res->seq_res, rqstp);
6253         if (status)
6254                 goto out;
6255         status = decode_putfh(xdr);
6256         if (status)
6257                 goto out;
6258         status = decode_lookupp(xdr);
6259         if (status)
6260                 goto out;
6261         status = decode_getfh(xdr, res->fh);
6262         if (status)
6263                 goto out;
6264         status = decode_getfattr(xdr, res->fattr, res->server);
6265 out:
6266         return status;
6267 }
6268
6269 /*
6270  * Decode LOOKUP_ROOT response
6271  */
6272 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6273                                     struct xdr_stream *xdr,
6274                                     void *data)
6275 {
6276         struct nfs4_lookup_res *res = data;
6277         struct compound_hdr hdr;
6278         int status;
6279
6280         status = decode_compound_hdr(xdr, &hdr);
6281         if (status)
6282                 goto out;
6283         status = decode_sequence(xdr, &res->seq_res, rqstp);
6284         if (status)
6285                 goto out;
6286         status = decode_putrootfh(xdr);
6287         if (status)
6288                 goto out;
6289         status = decode_getfh(xdr, res->fh);
6290         if (status == 0)
6291                 status = decode_getfattr(xdr, res->fattr, res->server);
6292 out:
6293         return status;
6294 }
6295
6296 /*
6297  * Decode REMOVE response
6298  */
6299 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6300                                void *data)
6301 {
6302         struct nfs_removeres *res = data;
6303         struct compound_hdr hdr;
6304         int status;
6305
6306         status = decode_compound_hdr(xdr, &hdr);
6307         if (status)
6308                 goto out;
6309         status = decode_sequence(xdr, &res->seq_res, rqstp);
6310         if (status)
6311                 goto out;
6312         status = decode_putfh(xdr);
6313         if (status)
6314                 goto out;
6315         status = decode_remove(xdr, &res->cinfo);
6316 out:
6317         return status;
6318 }
6319
6320 /*
6321  * Decode RENAME response
6322  */
6323 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6324                                void *data)
6325 {
6326         struct nfs_renameres *res = data;
6327         struct compound_hdr hdr;
6328         int status;
6329
6330         status = decode_compound_hdr(xdr, &hdr);
6331         if (status)
6332                 goto out;
6333         status = decode_sequence(xdr, &res->seq_res, rqstp);
6334         if (status)
6335                 goto out;
6336         status = decode_putfh(xdr);
6337         if (status)
6338                 goto out;
6339         status = decode_savefh(xdr);
6340         if (status)
6341                 goto out;
6342         status = decode_putfh(xdr);
6343         if (status)
6344                 goto out;
6345         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6346 out:
6347         return status;
6348 }
6349
6350 /*
6351  * Decode LINK response
6352  */
6353 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6354                              void *data)
6355 {
6356         struct nfs4_link_res *res = data;
6357         struct compound_hdr hdr;
6358         int status;
6359
6360         status = decode_compound_hdr(xdr, &hdr);
6361         if (status)
6362                 goto out;
6363         status = decode_sequence(xdr, &res->seq_res, rqstp);
6364         if (status)
6365                 goto out;
6366         status = decode_putfh(xdr);
6367         if (status)
6368                 goto out;
6369         status = decode_savefh(xdr);
6370         if (status)
6371                 goto out;
6372         status = decode_putfh(xdr);
6373         if (status)
6374                 goto out;
6375         status = decode_link(xdr, &res->cinfo);
6376         if (status)
6377                 goto out;
6378         /*
6379          * Note order: OP_LINK leaves the directory as the current
6380          *             filehandle.
6381          */
6382         status = decode_restorefh(xdr);
6383         if (status)
6384                 goto out;
6385         decode_getfattr(xdr, res->fattr, res->server);
6386 out:
6387         return status;
6388 }
6389
6390 /*
6391  * Decode CREATE response
6392  */
6393 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6394                                void *data)
6395 {
6396         struct nfs4_create_res *res = data;
6397         struct compound_hdr hdr;
6398         int status;
6399
6400         status = decode_compound_hdr(xdr, &hdr);
6401         if (status)
6402                 goto out;
6403         status = decode_sequence(xdr, &res->seq_res, rqstp);
6404         if (status)
6405                 goto out;
6406         status = decode_putfh(xdr);
6407         if (status)
6408                 goto out;
6409         status = decode_create(xdr, &res->dir_cinfo);
6410         if (status)
6411                 goto out;
6412         status = decode_getfh(xdr, res->fh);
6413         if (status)
6414                 goto out;
6415         decode_getfattr(xdr, res->fattr, res->server);
6416 out:
6417         return status;
6418 }
6419
6420 /*
6421  * Decode SYMLINK response
6422  */
6423 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6424                                 void *res)
6425 {
6426         return nfs4_xdr_dec_create(rqstp, xdr, res);
6427 }
6428
6429 /*
6430  * Decode GETATTR response
6431  */
6432 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6433                                 void *data)
6434 {
6435         struct nfs4_getattr_res *res = data;
6436         struct compound_hdr hdr;
6437         int status;
6438
6439         status = decode_compound_hdr(xdr, &hdr);
6440         if (status)
6441                 goto out;
6442         status = decode_sequence(xdr, &res->seq_res, rqstp);
6443         if (status)
6444                 goto out;
6445         status = decode_putfh(xdr);
6446         if (status)
6447                 goto out;
6448         status = decode_getfattr(xdr, res->fattr, res->server);
6449 out:
6450         return status;
6451 }
6452
6453 /*
6454  * Encode an SETACL request
6455  */
6456 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6457                                 const void *data)
6458 {
6459         const struct nfs_setaclargs *args = data;
6460         struct compound_hdr hdr = {
6461                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6462         };
6463
6464         encode_compound_hdr(xdr, req, &hdr);
6465         encode_sequence(xdr, &args->seq_args, &hdr);
6466         encode_putfh(xdr, args->fh, &hdr);
6467         encode_setacl(xdr, args, &hdr);
6468         encode_nops(&hdr);
6469 }
6470
6471 /*
6472  * Decode SETACL response
6473  */
6474 static int
6475 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6476                     void *data)
6477 {
6478         struct nfs_setaclres *res = data;
6479         struct compound_hdr hdr;
6480         int status;
6481
6482         status = decode_compound_hdr(xdr, &hdr);
6483         if (status)
6484                 goto out;
6485         status = decode_sequence(xdr, &res->seq_res, rqstp);
6486         if (status)
6487                 goto out;
6488         status = decode_putfh(xdr);
6489         if (status)
6490                 goto out;
6491         status = decode_setattr(xdr);
6492 out:
6493         return status;
6494 }
6495
6496 /*
6497  * Decode GETACL response
6498  */
6499 static int
6500 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6501                     void *data)
6502 {
6503         struct nfs_getaclres *res = data;
6504         struct compound_hdr hdr;
6505         int status;
6506
6507         if (res->acl_scratch != NULL)
6508                 xdr_set_scratch_page(xdr, res->acl_scratch);
6509         status = decode_compound_hdr(xdr, &hdr);
6510         if (status)
6511                 goto out;
6512         status = decode_sequence(xdr, &res->seq_res, rqstp);
6513         if (status)
6514                 goto out;
6515         status = decode_putfh(xdr);
6516         if (status)
6517                 goto out;
6518         status = decode_getacl(xdr, rqstp, res, res->acl_type);
6519
6520 out:
6521         return status;
6522 }
6523
6524 /*
6525  * Decode CLOSE response
6526  */
6527 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6528                               void *data)
6529 {
6530         struct nfs_closeres *res = data;
6531         struct compound_hdr hdr;
6532         int status;
6533
6534         status = decode_compound_hdr(xdr, &hdr);
6535         if (status)
6536                 goto out;
6537         status = decode_sequence(xdr, &res->seq_res, rqstp);
6538         if (status)
6539                 goto out;
6540         status = decode_putfh(xdr);
6541         if (status)
6542                 goto out;
6543         if (res->lr_res) {
6544                 status = decode_layoutreturn(xdr, res->lr_res);
6545                 res->lr_ret = status;
6546                 if (status)
6547                         goto out;
6548         }
6549         if (res->fattr != NULL) {
6550                 status = decode_getfattr(xdr, res->fattr, res->server);
6551                 if (status != 0)
6552                         goto out;
6553         }
6554         status = decode_close(xdr, res);
6555 out:
6556         return status;
6557 }
6558
6559 /*
6560  * Decode OPEN response
6561  */
6562 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6563                              void *data)
6564 {
6565         struct nfs_openres *res = data;
6566         struct compound_hdr hdr;
6567         int status;
6568
6569         status = decode_compound_hdr(xdr, &hdr);
6570         if (status)
6571                 goto out;
6572         status = decode_sequence(xdr, &res->seq_res, rqstp);
6573         if (status)
6574                 goto out;
6575         status = decode_putfh(xdr);
6576         if (status)
6577                 goto out;
6578         status = decode_open(xdr, res);
6579         if (status)
6580                 goto out;
6581         status = decode_getfh(xdr, &res->fh);
6582         if (status)
6583                 goto out;
6584         if (res->access_request)
6585                 decode_access(xdr, &res->access_supported, &res->access_result);
6586         decode_getfattr(xdr, res->f_attr, res->server);
6587         if (res->lg_res)
6588                 decode_layoutget(xdr, rqstp, res->lg_res);
6589 out:
6590         return status;
6591 }
6592
6593 /*
6594  * Decode OPEN_CONFIRM response
6595  */
6596 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6597                                      struct xdr_stream *xdr,
6598                                      void *data)
6599 {
6600         struct nfs_open_confirmres *res = data;
6601         struct compound_hdr hdr;
6602         int status;
6603
6604         status = decode_compound_hdr(xdr, &hdr);
6605         if (status)
6606                 goto out;
6607         status = decode_putfh(xdr);
6608         if (status)
6609                 goto out;
6610         status = decode_open_confirm(xdr, res);
6611 out:
6612         return status;
6613 }
6614
6615 /*
6616  * Decode OPEN response
6617  */
6618 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6619                                     struct xdr_stream *xdr,
6620                                     void *data)
6621 {
6622         struct nfs_openres *res = data;
6623         struct compound_hdr hdr;
6624         int status;
6625
6626         status = decode_compound_hdr(xdr, &hdr);
6627         if (status)
6628                 goto out;
6629         status = decode_sequence(xdr, &res->seq_res, rqstp);
6630         if (status)
6631                 goto out;
6632         status = decode_putfh(xdr);
6633         if (status)
6634                 goto out;
6635         status = decode_open(xdr, res);
6636         if (status)
6637                 goto out;
6638         if (res->access_request)
6639                 decode_access(xdr, &res->access_supported, &res->access_result);
6640         decode_getfattr(xdr, res->f_attr, res->server);
6641         if (res->lg_res)
6642                 decode_layoutget(xdr, rqstp, res->lg_res);
6643 out:
6644         return status;
6645 }
6646
6647 /*
6648  * Decode SETATTR response
6649  */
6650 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6651                                 struct xdr_stream *xdr,
6652                                 void *data)
6653 {
6654         struct nfs_setattrres *res = data;
6655         struct compound_hdr hdr;
6656         int status;
6657
6658         status = decode_compound_hdr(xdr, &hdr);
6659         if (status)
6660                 goto out;
6661         status = decode_sequence(xdr, &res->seq_res, rqstp);
6662         if (status)
6663                 goto out;
6664         status = decode_putfh(xdr);
6665         if (status)
6666                 goto out;
6667         status = decode_setattr(xdr);
6668         if (status)
6669                 goto out;
6670         decode_getfattr(xdr, res->fattr, res->server);
6671 out:
6672         return status;
6673 }
6674
6675 /*
6676  * Decode LOCK response
6677  */
6678 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6679                              void *data)
6680 {
6681         struct nfs_lock_res *res = data;
6682         struct compound_hdr hdr;
6683         int status;
6684
6685         status = decode_compound_hdr(xdr, &hdr);
6686         if (status)
6687                 goto out;
6688         status = decode_sequence(xdr, &res->seq_res, rqstp);
6689         if (status)
6690                 goto out;
6691         status = decode_putfh(xdr);
6692         if (status)
6693                 goto out;
6694         status = decode_lock(xdr, res);
6695 out:
6696         return status;
6697 }
6698
6699 /*
6700  * Decode LOCKT response
6701  */
6702 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6703                               void *data)
6704 {
6705         struct nfs_lockt_res *res = data;
6706         struct compound_hdr hdr;
6707         int status;
6708
6709         status = decode_compound_hdr(xdr, &hdr);
6710         if (status)
6711                 goto out;
6712         status = decode_sequence(xdr, &res->seq_res, rqstp);
6713         if (status)
6714                 goto out;
6715         status = decode_putfh(xdr);
6716         if (status)
6717                 goto out;
6718         status = decode_lockt(xdr, res);
6719 out:
6720         return status;
6721 }
6722
6723 /*
6724  * Decode LOCKU response
6725  */
6726 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6727                               void *data)
6728 {
6729         struct nfs_locku_res *res = data;
6730         struct compound_hdr hdr;
6731         int status;
6732
6733         status = decode_compound_hdr(xdr, &hdr);
6734         if (status)
6735                 goto out;
6736         status = decode_sequence(xdr, &res->seq_res, rqstp);
6737         if (status)
6738                 goto out;
6739         status = decode_putfh(xdr);
6740         if (status)
6741                 goto out;
6742         status = decode_locku(xdr, res);
6743 out:
6744         return status;
6745 }
6746
6747 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6748                                           struct xdr_stream *xdr, void *dummy)
6749 {
6750         struct compound_hdr hdr;
6751         int status;
6752
6753         status = decode_compound_hdr(xdr, &hdr);
6754         if (!status)
6755                 status = decode_release_lockowner(xdr);
6756         return status;
6757 }
6758
6759 /*
6760  * Decode READLINK response
6761  */
6762 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6763                                  struct xdr_stream *xdr,
6764                                  void *data)
6765 {
6766         struct nfs4_readlink_res *res = data;
6767         struct compound_hdr hdr;
6768         int status;
6769
6770         status = decode_compound_hdr(xdr, &hdr);
6771         if (status)
6772                 goto out;
6773         status = decode_sequence(xdr, &res->seq_res, rqstp);
6774         if (status)
6775                 goto out;
6776         status = decode_putfh(xdr);
6777         if (status)
6778                 goto out;
6779         status = decode_readlink(xdr, rqstp);
6780 out:
6781         return status;
6782 }
6783
6784 /*
6785  * Decode READDIR response
6786  */
6787 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6788                                 void *data)
6789 {
6790         struct nfs4_readdir_res *res = data;
6791         struct compound_hdr hdr;
6792         int status;
6793
6794         status = decode_compound_hdr(xdr, &hdr);
6795         if (status)
6796                 goto out;
6797         status = decode_sequence(xdr, &res->seq_res, rqstp);
6798         if (status)
6799                 goto out;
6800         status = decode_putfh(xdr);
6801         if (status)
6802                 goto out;
6803         status = decode_readdir(xdr, rqstp, res);
6804 out:
6805         return status;
6806 }
6807
6808 /*
6809  * Decode Read response
6810  */
6811 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6812                              void *data)
6813 {
6814         struct nfs_pgio_res *res = data;
6815         struct compound_hdr hdr;
6816         int status;
6817
6818         status = decode_compound_hdr(xdr, &hdr);
6819         res->op_status = hdr.status;
6820         if (status)
6821                 goto out;
6822         status = decode_sequence(xdr, &res->seq_res, rqstp);
6823         if (status)
6824                 goto out;
6825         status = decode_putfh(xdr);
6826         if (status)
6827                 goto out;
6828         status = decode_read(xdr, rqstp, res);
6829         if (!status)
6830                 status = res->count;
6831 out:
6832         return status;
6833 }
6834
6835 /*
6836  * Decode WRITE response
6837  */
6838 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6839                               void *data)
6840 {
6841         struct nfs_pgio_res *res = data;
6842         struct compound_hdr hdr;
6843         int status;
6844
6845         status = decode_compound_hdr(xdr, &hdr);
6846         res->op_status = hdr.status;
6847         if (status)
6848                 goto out;
6849         status = decode_sequence(xdr, &res->seq_res, rqstp);
6850         if (status)
6851                 goto out;
6852         status = decode_putfh(xdr);
6853         if (status)
6854                 goto out;
6855         status = decode_write(xdr, res);
6856         if (status)
6857                 goto out;
6858         if (res->fattr)
6859                 decode_getfattr(xdr, res->fattr, res->server);
6860         if (!status)
6861                 status = res->count;
6862 out:
6863         return status;
6864 }
6865
6866 /*
6867  * Decode COMMIT response
6868  */
6869 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6870                                void *data)
6871 {
6872         struct nfs_commitres *res = data;
6873         struct compound_hdr hdr;
6874         int status;
6875
6876         status = decode_compound_hdr(xdr, &hdr);
6877         res->op_status = hdr.status;
6878         if (status)
6879                 goto out;
6880         status = decode_sequence(xdr, &res->seq_res, rqstp);
6881         if (status)
6882                 goto out;
6883         status = decode_putfh(xdr);
6884         if (status)
6885                 goto out;
6886         status = decode_commit(xdr, res);
6887 out:
6888         return status;
6889 }
6890
6891 /*
6892  * Decode FSINFO response
6893  */
6894 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6895                                void *data)
6896 {
6897         struct nfs4_fsinfo_res *res = data;
6898         struct compound_hdr hdr;
6899         int status;
6900
6901         status = decode_compound_hdr(xdr, &hdr);
6902         if (!status)
6903                 status = decode_sequence(xdr, &res->seq_res, req);
6904         if (!status)
6905                 status = decode_putfh(xdr);
6906         if (!status)
6907                 status = decode_fsinfo(xdr, res->fsinfo);
6908         return status;
6909 }
6910
6911 /*
6912  * Decode PATHCONF response
6913  */
6914 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6915                                  void *data)
6916 {
6917         struct nfs4_pathconf_res *res = data;
6918         struct compound_hdr hdr;
6919         int status;
6920
6921         status = decode_compound_hdr(xdr, &hdr);
6922         if (!status)
6923                 status = decode_sequence(xdr, &res->seq_res, req);
6924         if (!status)
6925                 status = decode_putfh(xdr);
6926         if (!status)
6927                 status = decode_pathconf(xdr, res->pathconf);
6928         return status;
6929 }
6930
6931 /*
6932  * Decode STATFS response
6933  */
6934 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6935                                void *data)
6936 {
6937         struct nfs4_statfs_res *res = data;
6938         struct compound_hdr hdr;
6939         int status;
6940
6941         status = decode_compound_hdr(xdr, &hdr);
6942         if (!status)
6943                 status = decode_sequence(xdr, &res->seq_res, req);
6944         if (!status)
6945                 status = decode_putfh(xdr);
6946         if (!status)
6947                 status = decode_statfs(xdr, res->fsstat);
6948         return status;
6949 }
6950
6951 /*
6952  * Decode GETATTR_BITMAP response
6953  */
6954 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6955                                     struct xdr_stream *xdr,
6956                                     void *data)
6957 {
6958         struct nfs4_server_caps_res *res = data;
6959         struct compound_hdr hdr;
6960         int status;
6961
6962         status = decode_compound_hdr(xdr, &hdr);
6963         if (status)
6964                 goto out;
6965         status = decode_sequence(xdr, &res->seq_res, req);
6966         if (status)
6967                 goto out;
6968         status = decode_putfh(xdr);
6969         if (status)
6970                 goto out;
6971         status = decode_server_caps(xdr, res);
6972 out:
6973         return status;
6974 }
6975
6976 /*
6977  * Decode RENEW response
6978  */
6979 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6980                               void *__unused)
6981 {
6982         struct compound_hdr hdr;
6983         int status;
6984
6985         status = decode_compound_hdr(xdr, &hdr);
6986         if (!status)
6987                 status = decode_renew(xdr);
6988         return status;
6989 }
6990
6991 /*
6992  * Decode SETCLIENTID response
6993  */
6994 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6995                                     struct xdr_stream *xdr,
6996                                     void *data)
6997 {
6998         struct nfs4_setclientid_res *res = data;
6999         struct compound_hdr hdr;
7000         int status;
7001
7002         status = decode_compound_hdr(xdr, &hdr);
7003         if (!status)
7004                 status = decode_setclientid(xdr, res);
7005         return status;
7006 }
7007
7008 /*
7009  * Decode SETCLIENTID_CONFIRM response
7010  */
7011 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7012                                             struct xdr_stream *xdr,
7013                                             void *data)
7014 {
7015         struct compound_hdr hdr;
7016         int status;
7017
7018         status = decode_compound_hdr(xdr, &hdr);
7019         if (!status)
7020                 status = decode_setclientid_confirm(xdr);
7021         return status;
7022 }
7023
7024 /*
7025  * Decode DELEGRETURN response
7026  */
7027 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7028                                     struct xdr_stream *xdr,
7029                                     void *data)
7030 {
7031         struct nfs4_delegreturnres *res = data;
7032         struct compound_hdr hdr;
7033         int status;
7034
7035         status = decode_compound_hdr(xdr, &hdr);
7036         if (status)
7037                 goto out;
7038         status = decode_sequence(xdr, &res->seq_res, rqstp);
7039         if (status)
7040                 goto out;
7041         status = decode_putfh(xdr);
7042         if (status != 0)
7043                 goto out;
7044         if (res->lr_res) {
7045                 status = decode_layoutreturn(xdr, res->lr_res);
7046                 res->lr_ret = status;
7047                 if (status)
7048                         goto out;
7049         }
7050         if (res->fattr) {
7051                 status = decode_getfattr(xdr, res->fattr, res->server);
7052                 if (status != 0)
7053                         goto out;
7054         }
7055         status = decode_delegreturn(xdr);
7056 out:
7057         return status;
7058 }
7059
7060 /*
7061  * Decode FS_LOCATIONS response
7062  */
7063 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7064                                      struct xdr_stream *xdr,
7065                                      void *data)
7066 {
7067         struct nfs4_fs_locations_res *res = data;
7068         struct compound_hdr hdr;
7069         int status;
7070
7071         status = decode_compound_hdr(xdr, &hdr);
7072         if (status)
7073                 goto out;
7074         status = decode_sequence(xdr, &res->seq_res, req);
7075         if (status)
7076                 goto out;
7077         status = decode_putfh(xdr);
7078         if (status)
7079                 goto out;
7080         if (res->migration) {
7081                 xdr_enter_page(xdr, PAGE_SIZE);
7082                 status = decode_getfattr_generic(xdr,
7083                                         res->fs_locations->fattr,
7084                                          NULL, res->fs_locations,
7085                                          res->fs_locations->server);
7086                 if (status)
7087                         goto out;
7088                 if (res->renew)
7089                         status = decode_renew(xdr);
7090         } else {
7091                 status = decode_lookup(xdr);
7092                 if (status)
7093                         goto out;
7094                 xdr_enter_page(xdr, PAGE_SIZE);
7095                 status = decode_getfattr_generic(xdr,
7096                                         res->fs_locations->fattr,
7097                                          NULL, res->fs_locations,
7098                                          res->fs_locations->server);
7099         }
7100 out:
7101         return status;
7102 }
7103
7104 /*
7105  * Decode SECINFO response
7106  */
7107 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7108                                 struct xdr_stream *xdr,
7109                                 void *data)
7110 {
7111         struct nfs4_secinfo_res *res = data;
7112         struct compound_hdr hdr;
7113         int status;
7114
7115         status = decode_compound_hdr(xdr, &hdr);
7116         if (status)
7117                 goto out;
7118         status = decode_sequence(xdr, &res->seq_res, rqstp);
7119         if (status)
7120                 goto out;
7121         status = decode_putfh(xdr);
7122         if (status)
7123                 goto out;
7124         status = decode_secinfo(xdr, res);
7125 out:
7126         return status;
7127 }
7128
7129 /*
7130  * Decode FSID_PRESENT response
7131  */
7132 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7133                                      struct xdr_stream *xdr,
7134                                      void *data)
7135 {
7136         struct nfs4_fsid_present_res *res = data;
7137         struct compound_hdr hdr;
7138         int status;
7139
7140         status = decode_compound_hdr(xdr, &hdr);
7141         if (status)
7142                 goto out;
7143         status = decode_sequence(xdr, &res->seq_res, rqstp);
7144         if (status)
7145                 goto out;
7146         status = decode_putfh(xdr);
7147         if (status)
7148                 goto out;
7149         status = decode_getfh(xdr, res->fh);
7150         if (status)
7151                 goto out;
7152         if (res->renew)
7153                 status = decode_renew(xdr);
7154 out:
7155         return status;
7156 }
7157
7158 #if defined(CONFIG_NFS_V4_1)
7159 /*
7160  * Decode BIND_CONN_TO_SESSION response
7161  */
7162 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7163                                         struct xdr_stream *xdr,
7164                                         void *res)
7165 {
7166         struct compound_hdr hdr;
7167         int status;
7168
7169         status = decode_compound_hdr(xdr, &hdr);
7170         if (!status)
7171                 status = decode_bind_conn_to_session(xdr, res);
7172         return status;
7173 }
7174
7175 /*
7176  * Decode EXCHANGE_ID response
7177  */
7178 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7179                                     struct xdr_stream *xdr,
7180                                     void *res)
7181 {
7182         struct compound_hdr hdr;
7183         int status;
7184
7185         status = decode_compound_hdr(xdr, &hdr);
7186         if (!status)
7187                 status = decode_exchange_id(xdr, res);
7188         return status;
7189 }
7190
7191 /*
7192  * Decode CREATE_SESSION response
7193  */
7194 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7195                                        struct xdr_stream *xdr,
7196                                        void *res)
7197 {
7198         struct compound_hdr hdr;
7199         int status;
7200
7201         status = decode_compound_hdr(xdr, &hdr);
7202         if (!status)
7203                 status = decode_create_session(xdr, res);
7204         return status;
7205 }
7206
7207 /*
7208  * Decode DESTROY_SESSION response
7209  */
7210 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7211                                         struct xdr_stream *xdr,
7212                                         void *res)
7213 {
7214         struct compound_hdr hdr;
7215         int status;
7216
7217         status = decode_compound_hdr(xdr, &hdr);
7218         if (!status)
7219                 status = decode_destroy_session(xdr, res);
7220         return status;
7221 }
7222
7223 /*
7224  * Decode DESTROY_CLIENTID response
7225  */
7226 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7227                                         struct xdr_stream *xdr,
7228                                         void *res)
7229 {
7230         struct compound_hdr hdr;
7231         int status;
7232
7233         status = decode_compound_hdr(xdr, &hdr);
7234         if (!status)
7235                 status = decode_destroy_clientid(xdr, res);
7236         return status;
7237 }
7238
7239 /*
7240  * Decode SEQUENCE response
7241  */
7242 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7243                                  struct xdr_stream *xdr,
7244                                  void *res)
7245 {
7246         struct compound_hdr hdr;
7247         int status;
7248
7249         status = decode_compound_hdr(xdr, &hdr);
7250         if (!status)
7251                 status = decode_sequence(xdr, res, rqstp);
7252         return status;
7253 }
7254
7255 #endif
7256
7257 /*
7258  * Decode GET_LEASE_TIME response
7259  */
7260 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7261                                        struct xdr_stream *xdr,
7262                                        void *data)
7263 {
7264         struct nfs4_get_lease_time_res *res = data;
7265         struct compound_hdr hdr;
7266         int status;
7267
7268         status = decode_compound_hdr(xdr, &hdr);
7269         if (!status)
7270                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7271         if (!status)
7272                 status = decode_putrootfh(xdr);
7273         if (!status)
7274                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7275         return status;
7276 }
7277
7278 #ifdef CONFIG_NFS_V4_1
7279
7280 /*
7281  * Decode RECLAIM_COMPLETE response
7282  */
7283 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7284                                          struct xdr_stream *xdr,
7285                                          void *data)
7286 {
7287         struct nfs41_reclaim_complete_res *res = data;
7288         struct compound_hdr hdr;
7289         int status;
7290
7291         status = decode_compound_hdr(xdr, &hdr);
7292         if (!status)
7293                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7294         if (!status)
7295                 status = decode_reclaim_complete(xdr, NULL);
7296         return status;
7297 }
7298
7299 /*
7300  * Decode GETDEVINFO response
7301  */
7302 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7303                                       struct xdr_stream *xdr,
7304                                       void *data)
7305 {
7306         struct nfs4_getdeviceinfo_res *res = data;
7307         struct compound_hdr hdr;
7308         int status;
7309
7310         status = decode_compound_hdr(xdr, &hdr);
7311         if (status != 0)
7312                 goto out;
7313         status = decode_sequence(xdr, &res->seq_res, rqstp);
7314         if (status != 0)
7315                 goto out;
7316         status = decode_getdeviceinfo(xdr, res);
7317 out:
7318         return status;
7319 }
7320
7321 /*
7322  * Decode LAYOUTGET response
7323  */
7324 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7325                                   struct xdr_stream *xdr,
7326                                   void *data)
7327 {
7328         struct nfs4_layoutget_res *res = data;
7329         struct compound_hdr hdr;
7330         int status;
7331
7332         status = decode_compound_hdr(xdr, &hdr);
7333         if (status)
7334                 goto out;
7335         status = decode_sequence(xdr, &res->seq_res, rqstp);
7336         if (status)
7337                 goto out;
7338         status = decode_putfh(xdr);
7339         if (status)
7340                 goto out;
7341         status = decode_layoutget(xdr, rqstp, res);
7342 out:
7343         return status;
7344 }
7345
7346 /*
7347  * Decode LAYOUTRETURN response
7348  */
7349 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7350                                      struct xdr_stream *xdr,
7351                                      void *data)
7352 {
7353         struct nfs4_layoutreturn_res *res = data;
7354         struct compound_hdr hdr;
7355         int status;
7356
7357         status = decode_compound_hdr(xdr, &hdr);
7358         if (status)
7359                 goto out;
7360         status = decode_sequence(xdr, &res->seq_res, rqstp);
7361         if (status)
7362                 goto out;
7363         status = decode_putfh(xdr);
7364         if (status)
7365                 goto out;
7366         status = decode_layoutreturn(xdr, res);
7367 out:
7368         return status;
7369 }
7370
7371 /*
7372  * Decode LAYOUTCOMMIT response
7373  */
7374 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7375                                      struct xdr_stream *xdr,
7376                                      void *data)
7377 {
7378         struct nfs4_layoutcommit_res *res = data;
7379         struct compound_hdr hdr;
7380         int status;
7381
7382         status = decode_compound_hdr(xdr, &hdr);
7383         if (status)
7384                 goto out;
7385         status = decode_sequence(xdr, &res->seq_res, rqstp);
7386         if (status)
7387                 goto out;
7388         status = decode_putfh(xdr);
7389         if (status)
7390                 goto out;
7391         status = decode_layoutcommit(xdr, rqstp, res);
7392         if (status)
7393                 goto out;
7394         decode_getfattr(xdr, res->fattr, res->server);
7395 out:
7396         return status;
7397 }
7398
7399 /*
7400  * Decode SECINFO_NO_NAME response
7401  */
7402 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7403                                         struct xdr_stream *xdr,
7404                                         void *data)
7405 {
7406         struct nfs4_secinfo_res *res = data;
7407         struct compound_hdr hdr;
7408         int status;
7409
7410         status = decode_compound_hdr(xdr, &hdr);
7411         if (status)
7412                 goto out;
7413         status = decode_sequence(xdr, &res->seq_res, rqstp);
7414         if (status)
7415                 goto out;
7416         status = decode_putrootfh(xdr);
7417         if (status)
7418                 goto out;
7419         status = decode_secinfo_no_name(xdr, res);
7420 out:
7421         return status;
7422 }
7423
7424 /*
7425  * Decode TEST_STATEID response
7426  */
7427 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7428                                      struct xdr_stream *xdr,
7429                                      void *data)
7430 {
7431         struct nfs41_test_stateid_res *res = data;
7432         struct compound_hdr hdr;
7433         int status;
7434
7435         status = decode_compound_hdr(xdr, &hdr);
7436         if (status)
7437                 goto out;
7438         status = decode_sequence(xdr, &res->seq_res, rqstp);
7439         if (status)
7440                 goto out;
7441         status = decode_test_stateid(xdr, res);
7442 out:
7443         return status;
7444 }
7445
7446 /*
7447  * Decode FREE_STATEID response
7448  */
7449 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7450                                      struct xdr_stream *xdr,
7451                                      void *data)
7452 {
7453         struct nfs41_free_stateid_res *res = data;
7454         struct compound_hdr hdr;
7455         int status;
7456
7457         status = decode_compound_hdr(xdr, &hdr);
7458         if (status)
7459                 goto out;
7460         status = decode_sequence(xdr, &res->seq_res, rqstp);
7461         if (status)
7462                 goto out;
7463         status = decode_free_stateid(xdr, res);
7464 out:
7465         return status;
7466 }
7467 #endif /* CONFIG_NFS_V4_1 */
7468
7469 /**
7470  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7471  *                      the local page cache.
7472  * @xdr: XDR stream where entry resides
7473  * @entry: buffer to fill in with entry data
7474  * @plus: boolean indicating whether this should be a readdirplus entry
7475  *
7476  * Returns zero if successful, otherwise a negative errno value is
7477  * returned.
7478  *
7479  * This function is not invoked during READDIR reply decoding, but
7480  * rather whenever an application invokes the getdents(2) system call
7481  * on a directory already in our cache.
7482  */
7483 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7484                        bool plus)
7485 {
7486         unsigned int savep;
7487         uint32_t bitmap[3] = {0};
7488         uint32_t len;
7489         uint64_t new_cookie;
7490         __be32 *p = xdr_inline_decode(xdr, 4);
7491         if (unlikely(!p))
7492                 return -EAGAIN;
7493         if (*p == xdr_zero) {
7494                 p = xdr_inline_decode(xdr, 4);
7495                 if (unlikely(!p))
7496                         return -EAGAIN;
7497                 if (*p == xdr_zero)
7498                         return -EAGAIN;
7499                 entry->eof = 1;
7500                 return -EBADCOOKIE;
7501         }
7502
7503         p = xdr_inline_decode(xdr, 12);
7504         if (unlikely(!p))
7505                 return -EAGAIN;
7506         p = xdr_decode_hyper(p, &new_cookie);
7507         entry->len = be32_to_cpup(p);
7508
7509         p = xdr_inline_decode(xdr, entry->len);
7510         if (unlikely(!p))
7511                 return -EAGAIN;
7512         entry->name = (const char *) p;
7513
7514         /*
7515          * In case the server doesn't return an inode number,
7516          * we fake one here.  (We don't use inode number 0,
7517          * since glibc seems to choke on it...)
7518          */
7519         entry->ino = 1;
7520         entry->fattr->valid = 0;
7521
7522         if (decode_attr_bitmap(xdr, bitmap) < 0)
7523                 return -EAGAIN;
7524
7525         if (decode_attr_length(xdr, &len, &savep) < 0)
7526                 return -EAGAIN;
7527
7528         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7529                         NULL, entry->server) < 0)
7530                 return -EAGAIN;
7531         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7532                 entry->ino = entry->fattr->mounted_on_fileid;
7533         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7534                 entry->ino = entry->fattr->fileid;
7535
7536         entry->d_type = DT_UNKNOWN;
7537         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7538                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7539
7540         entry->cookie = new_cookie;
7541
7542         return 0;
7543 }
7544
7545 /*
7546  * We need to translate between nfs status return values and
7547  * the local errno values which may not be the same.
7548  */
7549 static struct {
7550         int stat;
7551         int errno;
7552 } nfs_errtbl[] = {
7553         { NFS4_OK,              0               },
7554         { NFS4ERR_PERM,         -EPERM          },
7555         { NFS4ERR_NOENT,        -ENOENT         },
7556         { NFS4ERR_IO,           -errno_NFSERR_IO},
7557         { NFS4ERR_NXIO,         -ENXIO          },
7558         { NFS4ERR_ACCESS,       -EACCES         },
7559         { NFS4ERR_EXIST,        -EEXIST         },
7560         { NFS4ERR_XDEV,         -EXDEV          },
7561         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7562         { NFS4ERR_ISDIR,        -EISDIR         },
7563         { NFS4ERR_INVAL,        -EINVAL         },
7564         { NFS4ERR_FBIG,         -EFBIG          },
7565         { NFS4ERR_NOSPC,        -ENOSPC         },
7566         { NFS4ERR_ROFS,         -EROFS          },
7567         { NFS4ERR_MLINK,        -EMLINK         },
7568         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7569         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7570         { NFS4ERR_DQUOT,        -EDQUOT         },
7571         { NFS4ERR_STALE,        -ESTALE         },
7572         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7573         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7574         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7575         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7576         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7577         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7578         { NFS4ERR_LOCKED,       -EAGAIN         },
7579         { NFS4ERR_SYMLINK,      -ELOOP          },
7580         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7581         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7582         { NFS4ERR_NOXATTR,      -ENODATA        },
7583         { NFS4ERR_XATTR2BIG,    -E2BIG          },
7584         { -1,                   -EIO            }
7585 };
7586
7587 /*
7588  * Convert an NFS error code to a local one.
7589  * This one is used jointly by NFSv2 and NFSv3.
7590  */
7591 static int
7592 nfs4_stat_to_errno(int stat)
7593 {
7594         int i;
7595         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7596                 if (nfs_errtbl[i].stat == stat)
7597                         return nfs_errtbl[i].errno;
7598         }
7599         if (stat <= 10000 || stat > 10100) {
7600                 /* The server is looney tunes. */
7601                 return -EREMOTEIO;
7602         }
7603         /* If we cannot translate the error, the recovery routines should
7604          * handle it.
7605          * Note: remaining NFSv4 error codes have values > 10000, so should
7606          * not conflict with native Linux error codes.
7607          */
7608         return -stat;
7609 }
7610
7611 #ifdef CONFIG_NFS_V4_2
7612 #include "nfs42xdr.c"
7613 #endif /* CONFIG_NFS_V4_2 */
7614
7615 #define PROC(proc, argtype, restype)                            \
7616 [NFSPROC4_CLNT_##proc] = {                                      \
7617         .p_proc   = NFSPROC4_COMPOUND,                          \
7618         .p_encode = nfs4_xdr_##argtype,                         \
7619         .p_decode = nfs4_xdr_##restype,                         \
7620         .p_arglen = NFS4_##argtype##_sz,                        \
7621         .p_replen = NFS4_##restype##_sz,                        \
7622         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7623         .p_name   = #proc,                                      \
7624 }
7625
7626 #define STUB(proc)              \
7627 [NFSPROC4_CLNT_##proc] = {      \
7628         .p_name = #proc,        \
7629 }
7630
7631 #if defined(CONFIG_NFS_V4_1)
7632 #define PROC41(proc, argtype, restype)                          \
7633         PROC(proc, argtype, restype)
7634 #else
7635 #define PROC41(proc, argtype, restype)                          \
7636         STUB(proc)
7637 #endif
7638
7639 #if defined(CONFIG_NFS_V4_2)
7640 #define PROC42(proc, argtype, restype)                          \
7641         PROC(proc, argtype, restype)
7642 #else
7643 #define PROC42(proc, argtype, restype)                          \
7644         STUB(proc)
7645 #endif
7646
7647 const struct rpc_procinfo nfs4_procedures[] = {
7648         PROC(READ,              enc_read,               dec_read),
7649         PROC(WRITE,             enc_write,              dec_write),
7650         PROC(COMMIT,            enc_commit,             dec_commit),
7651         PROC(OPEN,              enc_open,               dec_open),
7652         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7653         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7654         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7655         PROC(CLOSE,             enc_close,              dec_close),
7656         PROC(SETATTR,           enc_setattr,            dec_setattr),
7657         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7658         PROC(RENEW,             enc_renew,              dec_renew),
7659         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7660         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7661         PROC(LOCK,              enc_lock,               dec_lock),
7662         PROC(LOCKT,             enc_lockt,              dec_lockt),
7663         PROC(LOCKU,             enc_locku,              dec_locku),
7664         PROC(ACCESS,            enc_access,             dec_access),
7665         PROC(GETATTR,           enc_getattr,            dec_getattr),
7666         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7667         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7668         PROC(REMOVE,            enc_remove,             dec_remove),
7669         PROC(RENAME,            enc_rename,             dec_rename),
7670         PROC(LINK,              enc_link,               dec_link),
7671         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7672         PROC(CREATE,            enc_create,             dec_create),
7673         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7674         PROC(STATFS,            enc_statfs,             dec_statfs),
7675         PROC(READLINK,          enc_readlink,           dec_readlink),
7676         PROC(READDIR,           enc_readdir,            dec_readdir),
7677         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7678         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7679         PROC(GETACL,            enc_getacl,             dec_getacl),
7680         PROC(SETACL,            enc_setacl,             dec_setacl),
7681         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7682         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7683         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7684         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7685         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7686         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7687         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7688         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7689         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7690         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7691         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7692         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7693         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7694         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7695         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7696         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7697         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7698         STUB(GETDEVICELIST),
7699         PROC41(BIND_CONN_TO_SESSION,
7700                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7701         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7702         PROC42(SEEK,            enc_seek,               dec_seek),
7703         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7704         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7705         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7706         PROC42(CLONE,           enc_clone,              dec_clone),
7707         PROC42(COPY,            enc_copy,               dec_copy),
7708         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7709         PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7710         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7711         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7712         PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7713         PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7714         PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7715         PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7716         PROC42(READ_PLUS,       enc_read_plus,          dec_read_plus),
7717 };
7718
7719 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7720 const struct rpc_version nfs_version4 = {
7721         .number                 = 4,
7722         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7723         .procs                  = nfs4_procedures,
7724         .counts                 = nfs_version4_counts,
7725 };