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_TYPE
1606                 | FATTR4_WORD0_RDATTR_ERROR,
1607                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1608         };
1609         uint32_t dircount = readdir->count;
1610         uint32_t maxcount = readdir->count;
1611         __be32 *p, verf[2];
1612         uint32_t attrlen = 0;
1613         unsigned int i;
1614
1615         if (readdir->plus) {
1616                 attrs[0] |= FATTR4_WORD0_CHANGE
1617                         | FATTR4_WORD0_SIZE
1618                         | FATTR4_WORD0_FSID
1619                         | FATTR4_WORD0_FILEHANDLE
1620                         | FATTR4_WORD0_FILEID;
1621                 attrs[1] |= FATTR4_WORD1_MODE
1622                         | FATTR4_WORD1_NUMLINKS
1623                         | FATTR4_WORD1_OWNER
1624                         | FATTR4_WORD1_OWNER_GROUP
1625                         | FATTR4_WORD1_RAWDEV
1626                         | FATTR4_WORD1_SPACE_USED
1627                         | FATTR4_WORD1_TIME_ACCESS
1628                         | FATTR4_WORD1_TIME_METADATA
1629                         | FATTR4_WORD1_TIME_MODIFY;
1630                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1631         }
1632         /* Use mounted_on_fileid only if the server supports it */
1633         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1634                 attrs[0] |= FATTR4_WORD0_FILEID;
1635         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1636                 attrs[i] &= readdir->bitmask[i];
1637                 if (attrs[i] != 0)
1638                         attrlen = i+1;
1639         }
1640
1641         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1642         encode_uint64(xdr, readdir->cookie);
1643         encode_nfs4_verifier(xdr, &readdir->verifier);
1644         p = reserve_space(xdr, 12 + (attrlen << 2));
1645         *p++ = cpu_to_be32(dircount);
1646         *p++ = cpu_to_be32(maxcount);
1647         *p++ = cpu_to_be32(attrlen);
1648         for (i = 0; i < attrlen; i++)
1649                 *p++ = cpu_to_be32(attrs[i]);
1650         memcpy(verf, readdir->verifier.data, sizeof(verf));
1651
1652         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1653                         __func__,
1654                         (unsigned long long)readdir->cookie,
1655                         verf[0], verf[1],
1656                         attrs[0] & readdir->bitmask[0],
1657                         attrs[1] & readdir->bitmask[1],
1658                         attrs[2] & readdir->bitmask[2]);
1659 }
1660
1661 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1662 {
1663         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1664 }
1665
1666 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1667 {
1668         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1669         encode_string(xdr, name->len, name->name);
1670 }
1671
1672 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1673 {
1674         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1675         encode_string(xdr, oldname->len, oldname->name);
1676         encode_string(xdr, newname->len, newname->name);
1677 }
1678
1679 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1680                          struct compound_hdr *hdr)
1681 {
1682         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1683         encode_uint64(xdr, clid);
1684 }
1685
1686 static void
1687 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1688 {
1689         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1690 }
1691
1692 static void nfs4_acltype_to_bitmap(enum nfs4_acl_type type, __u32 bitmap[2])
1693 {
1694         switch (type) {
1695         default:
1696                 bitmap[0] = FATTR4_WORD0_ACL;
1697                 bitmap[1] = 0;
1698                 break;
1699         case NFS4ACL_DACL:
1700                 bitmap[0] = 0;
1701                 bitmap[1] = FATTR4_WORD1_DACL;
1702                 break;
1703         case NFS4ACL_SACL:
1704                 bitmap[0] = 0;
1705                 bitmap[1] = FATTR4_WORD1_SACL;
1706         }
1707 }
1708
1709 static void encode_setacl(struct xdr_stream *xdr,
1710                           const struct nfs_setaclargs *arg,
1711                           struct compound_hdr *hdr)
1712 {
1713         __u32 bitmap[2];
1714
1715         nfs4_acltype_to_bitmap(arg->acl_type, bitmap);
1716
1717         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1718         encode_nfs4_stateid(xdr, &zero_stateid);
1719         xdr_encode_bitmap4(xdr, bitmap, ARRAY_SIZE(bitmap));
1720         encode_uint32(xdr, arg->acl_len);
1721         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1722 }
1723
1724 static void
1725 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1726 {
1727         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1728 }
1729
1730 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1731 {
1732         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1733         encode_nfs4_stateid(xdr, &arg->stateid);
1734         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1735                         server->attr_bitmask);
1736 }
1737
1738 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1739 {
1740         __be32 *p;
1741
1742         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1743         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1744
1745         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1746                         setclientid->sc_clnt->cl_owner_id);
1747         p = reserve_space(xdr, 4);
1748         *p = cpu_to_be32(setclientid->sc_prog);
1749         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1750         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1751         p = reserve_space(xdr, 4);
1752         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1753 }
1754
1755 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1756 {
1757         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1758                         decode_setclientid_confirm_maxsz, hdr);
1759         encode_uint64(xdr, arg->clientid);
1760         encode_nfs4_verifier(xdr, &arg->confirm);
1761 }
1762
1763 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1764                          struct compound_hdr *hdr)
1765 {
1766         __be32 *p;
1767
1768         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1769         encode_nfs4_stateid(xdr, &args->stateid);
1770
1771         p = reserve_space(xdr, 16);
1772         p = xdr_encode_hyper(p, args->offset);
1773         *p++ = cpu_to_be32(args->stable);
1774         *p = cpu_to_be32(args->count);
1775
1776         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1777 }
1778
1779 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1780 {
1781         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1782         encode_nfs4_stateid(xdr, stateid);
1783 }
1784
1785 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1786 {
1787         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1788         encode_string(xdr, name->len, name->name);
1789 }
1790
1791 #if defined(CONFIG_NFS_V4_1)
1792 /* NFSv4.1 operations */
1793 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1794                                    const struct nfs41_bind_conn_to_session_args *args,
1795                                    struct compound_hdr *hdr)
1796 {
1797         __be32 *p;
1798
1799         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1800                 decode_bind_conn_to_session_maxsz, hdr);
1801         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1802         p = xdr_reserve_space(xdr, 8);
1803         *p++ = cpu_to_be32(args->dir);
1804         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1805 }
1806
1807 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1808 {
1809         unsigned int i;
1810         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1811         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1812                 encode_uint32(xdr, op_map->u.words[i]);
1813 }
1814
1815 static void encode_exchange_id(struct xdr_stream *xdr,
1816                                const struct nfs41_exchange_id_args *args,
1817                                struct compound_hdr *hdr)
1818 {
1819         __be32 *p;
1820         char impl_name[IMPL_NAME_LIMIT];
1821         int len = 0;
1822
1823         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1824         encode_nfs4_verifier(xdr, &args->verifier);
1825
1826         encode_string(xdr, strlen(args->client->cl_owner_id),
1827                         args->client->cl_owner_id);
1828
1829         encode_uint32(xdr, args->flags);
1830         encode_uint32(xdr, args->state_protect.how);
1831
1832         switch (args->state_protect.how) {
1833         case SP4_NONE:
1834                 break;
1835         case SP4_MACH_CRED:
1836                 encode_op_map(xdr, &args->state_protect.enforce);
1837                 encode_op_map(xdr, &args->state_protect.allow);
1838                 break;
1839         default:
1840                 WARN_ON_ONCE(1);
1841                 break;
1842         }
1843
1844         if (send_implementation_id &&
1845             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1846             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1847                 <= sizeof(impl_name) + 1)
1848                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1849                                utsname()->sysname, utsname()->release,
1850                                utsname()->version, utsname()->machine);
1851
1852         if (len > 0) {
1853                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1854
1855                 encode_string(xdr,
1856                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1857                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1858                 encode_string(xdr, len, impl_name);
1859                 /* just send zeros for nii_date - the date is in nii_name */
1860                 p = reserve_space(xdr, 12);
1861                 p = xdr_encode_hyper(p, 0);
1862                 *p = cpu_to_be32(0);
1863         } else
1864                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1865 }
1866
1867 static void encode_create_session(struct xdr_stream *xdr,
1868                                   const struct nfs41_create_session_args *args,
1869                                   struct compound_hdr *hdr)
1870 {
1871         __be32 *p;
1872         struct nfs_client *clp = args->client;
1873         struct rpc_clnt *clnt = clp->cl_rpcclient;
1874         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1875         u32 max_resp_sz_cached;
1876
1877         /*
1878          * Assumes OPEN is the biggest non-idempotent compound.
1879          * 2 is the verifier.
1880          */
1881         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1882                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1883
1884         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1885         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1886         p = xdr_encode_hyper(p, args->clientid);
1887         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1888         *p++ = cpu_to_be32(args->flags);                        /*flags */
1889
1890         /* Fore Channel */
1891         *p++ = cpu_to_be32(0);                          /* header padding size */
1892         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1893         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1894         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1895         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1896         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1897         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1898
1899         /* Back Channel */
1900         *p++ = cpu_to_be32(0);                          /* header padding size */
1901         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1902         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1903         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1904         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1905         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1906         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1907
1908         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1909         *p++ = cpu_to_be32(1);
1910         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1911
1912         /* authsys_parms rfc1831 */
1913         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1914         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1915         *p++ = cpu_to_be32(0);                          /* UID */
1916         *p++ = cpu_to_be32(0);                          /* GID */
1917         *p = cpu_to_be32(0);                            /* No more gids */
1918 }
1919
1920 static void encode_destroy_session(struct xdr_stream *xdr,
1921                                    const struct nfs4_session *session,
1922                                    struct compound_hdr *hdr)
1923 {
1924         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1925         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1926 }
1927
1928 static void encode_destroy_clientid(struct xdr_stream *xdr,
1929                                    uint64_t clientid,
1930                                    struct compound_hdr *hdr)
1931 {
1932         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1933         encode_uint64(xdr, clientid);
1934 }
1935
1936 static void encode_reclaim_complete(struct xdr_stream *xdr,
1937                                     const struct nfs41_reclaim_complete_args *args,
1938                                     struct compound_hdr *hdr)
1939 {
1940         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1941         encode_uint32(xdr, args->one_fs);
1942 }
1943 #endif /* CONFIG_NFS_V4_1 */
1944
1945 static void encode_sequence(struct xdr_stream *xdr,
1946                             const struct nfs4_sequence_args *args,
1947                             struct compound_hdr *hdr)
1948 {
1949 #if defined(CONFIG_NFS_V4_1)
1950         struct nfs4_session *session;
1951         struct nfs4_slot_table *tp;
1952         struct nfs4_slot *slot = args->sa_slot;
1953         __be32 *p;
1954
1955         tp = slot->table;
1956         session = tp->session;
1957         if (!session)
1958                 return;
1959
1960         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1961
1962         /*
1963          * Sessionid + seqid + slotid + max slotid + cache_this
1964          */
1965         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1966                 "max_slotid=%d cache_this=%d\n",
1967                 __func__,
1968                 ((u32 *)session->sess_id.data)[0],
1969                 ((u32 *)session->sess_id.data)[1],
1970                 ((u32 *)session->sess_id.data)[2],
1971                 ((u32 *)session->sess_id.data)[3],
1972                 slot->seq_nr, slot->slot_nr,
1973                 tp->highest_used_slotid, args->sa_cache_this);
1974         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1975         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1976         *p++ = cpu_to_be32(slot->seq_nr);
1977         *p++ = cpu_to_be32(slot->slot_nr);
1978         *p++ = cpu_to_be32(tp->highest_used_slotid);
1979         *p = cpu_to_be32(args->sa_cache_this);
1980 #endif /* CONFIG_NFS_V4_1 */
1981 }
1982
1983 #ifdef CONFIG_NFS_V4_1
1984 static void
1985 encode_getdeviceinfo(struct xdr_stream *xdr,
1986                      const struct nfs4_getdeviceinfo_args *args,
1987                      struct compound_hdr *hdr)
1988 {
1989         __be32 *p;
1990
1991         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1992         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1993         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1994                                     NFS4_DEVICEID4_SIZE);
1995         *p++ = cpu_to_be32(args->pdev->layout_type);
1996         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1997
1998         p = reserve_space(xdr, 4 + 4);
1999         *p++ = cpu_to_be32(1);                  /* bitmap length */
2000         *p++ = cpu_to_be32(args->notify_types);
2001 }
2002
2003 static void
2004 encode_layoutget(struct xdr_stream *xdr,
2005                       const struct nfs4_layoutget_args *args,
2006                       struct compound_hdr *hdr)
2007 {
2008         __be32 *p;
2009
2010         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
2011         p = reserve_space(xdr, 36);
2012         *p++ = cpu_to_be32(0);     /* Signal layout available */
2013         *p++ = cpu_to_be32(args->type);
2014         *p++ = cpu_to_be32(args->range.iomode);
2015         p = xdr_encode_hyper(p, args->range.offset);
2016         p = xdr_encode_hyper(p, args->range.length);
2017         p = xdr_encode_hyper(p, args->minlength);
2018         encode_nfs4_stateid(xdr, &args->stateid);
2019         encode_uint32(xdr, args->maxcount);
2020
2021         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
2022                 __func__,
2023                 args->type,
2024                 args->range.iomode,
2025                 (unsigned long)args->range.offset,
2026                 (unsigned long)args->range.length,
2027                 args->maxcount);
2028 }
2029
2030 static int
2031 encode_layoutcommit(struct xdr_stream *xdr,
2032                     struct inode *inode,
2033                     const struct nfs4_layoutcommit_args *args,
2034                     struct compound_hdr *hdr)
2035 {
2036         __be32 *p;
2037
2038         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2039                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2040
2041         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2042         p = reserve_space(xdr, 20);
2043         /* Only whole file layouts */
2044         p = xdr_encode_hyper(p, 0); /* offset */
2045         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2046         *p = cpu_to_be32(0); /* reclaim */
2047         encode_nfs4_stateid(xdr, &args->stateid);
2048         if (args->lastbytewritten != U64_MAX) {
2049                 p = reserve_space(xdr, 20);
2050                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2051                 p = xdr_encode_hyper(p, args->lastbytewritten);
2052         } else {
2053                 p = reserve_space(xdr, 12);
2054                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2055         }
2056         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2057         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2058
2059         encode_uint32(xdr, args->layoutupdate_len);
2060         if (args->layoutupdate_pages)
2061                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2062                                 args->layoutupdate_len);
2063
2064         return 0;
2065 }
2066
2067 static void
2068 encode_layoutreturn(struct xdr_stream *xdr,
2069                     const struct nfs4_layoutreturn_args *args,
2070                     struct compound_hdr *hdr)
2071 {
2072         __be32 *p;
2073
2074         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2075         p = reserve_space(xdr, 16);
2076         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2077         *p++ = cpu_to_be32(args->layout_type);
2078         *p++ = cpu_to_be32(args->range.iomode);
2079         *p = cpu_to_be32(RETURN_FILE);
2080         p = reserve_space(xdr, 16);
2081         p = xdr_encode_hyper(p, args->range.offset);
2082         p = xdr_encode_hyper(p, args->range.length);
2083         spin_lock(&args->inode->i_lock);
2084         encode_nfs4_stateid(xdr, &args->stateid);
2085         spin_unlock(&args->inode->i_lock);
2086         if (args->ld_private->ops && args->ld_private->ops->encode)
2087                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2088         else
2089                 encode_uint32(xdr, 0);
2090 }
2091
2092 static int
2093 encode_secinfo_no_name(struct xdr_stream *xdr,
2094                        const struct nfs41_secinfo_no_name_args *args,
2095                        struct compound_hdr *hdr)
2096 {
2097         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2098         encode_uint32(xdr, args->style);
2099         return 0;
2100 }
2101
2102 static void encode_test_stateid(struct xdr_stream *xdr,
2103                                 const struct nfs41_test_stateid_args *args,
2104                                 struct compound_hdr *hdr)
2105 {
2106         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2107         encode_uint32(xdr, 1);
2108         encode_nfs4_stateid(xdr, args->stateid);
2109 }
2110
2111 static void encode_free_stateid(struct xdr_stream *xdr,
2112                                 const struct nfs41_free_stateid_args *args,
2113                                 struct compound_hdr *hdr)
2114 {
2115         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2116         encode_nfs4_stateid(xdr, &args->stateid);
2117 }
2118 #else
2119 static inline void
2120 encode_layoutreturn(struct xdr_stream *xdr,
2121                     const struct nfs4_layoutreturn_args *args,
2122                     struct compound_hdr *hdr)
2123 {
2124 }
2125
2126 static void
2127 encode_layoutget(struct xdr_stream *xdr,
2128                       const struct nfs4_layoutget_args *args,
2129                       struct compound_hdr *hdr)
2130 {
2131 }
2132 #endif /* CONFIG_NFS_V4_1 */
2133
2134 /*
2135  * END OF "GENERIC" ENCODE ROUTINES.
2136  */
2137
2138 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2139 {
2140 #if defined(CONFIG_NFS_V4_1)
2141         struct nfs4_session *session = args->sa_slot->table->session;
2142         if (session)
2143                 return session->clp->cl_mvops->minor_version;
2144 #endif /* CONFIG_NFS_V4_1 */
2145         return 0;
2146 }
2147
2148 /*
2149  * Encode an ACCESS request
2150  */
2151 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2152                                 const void *data)
2153 {
2154         const struct nfs4_accessargs *args = data;
2155         struct compound_hdr hdr = {
2156                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157         };
2158
2159         encode_compound_hdr(xdr, req, &hdr);
2160         encode_sequence(xdr, &args->seq_args, &hdr);
2161         encode_putfh(xdr, args->fh, &hdr);
2162         encode_access(xdr, args->access, &hdr);
2163         if (args->bitmask)
2164                 encode_getfattr(xdr, args->bitmask, &hdr);
2165         encode_nops(&hdr);
2166 }
2167
2168 /*
2169  * Encode LOOKUP request
2170  */
2171 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2172                                 const void *data)
2173 {
2174         const struct nfs4_lookup_arg *args = data;
2175         struct compound_hdr hdr = {
2176                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2177         };
2178
2179         encode_compound_hdr(xdr, req, &hdr);
2180         encode_sequence(xdr, &args->seq_args, &hdr);
2181         encode_putfh(xdr, args->dir_fh, &hdr);
2182         encode_lookup(xdr, args->name, &hdr);
2183         encode_getfh(xdr, &hdr);
2184         encode_getfattr(xdr, args->bitmask, &hdr);
2185         encode_nops(&hdr);
2186 }
2187
2188 /*
2189  * Encode LOOKUPP request
2190  */
2191 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2192                 const void *data)
2193 {
2194         const struct nfs4_lookupp_arg *args = data;
2195         struct compound_hdr hdr = {
2196                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197         };
2198
2199         encode_compound_hdr(xdr, req, &hdr);
2200         encode_sequence(xdr, &args->seq_args, &hdr);
2201         encode_putfh(xdr, args->fh, &hdr);
2202         encode_lookupp(xdr, &hdr);
2203         encode_getfh(xdr, &hdr);
2204         encode_getfattr(xdr, args->bitmask, &hdr);
2205         encode_nops(&hdr);
2206 }
2207
2208 /*
2209  * Encode LOOKUP_ROOT request
2210  */
2211 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2212                                      struct xdr_stream *xdr,
2213                                      const void *data)
2214 {
2215         const struct nfs4_lookup_root_arg *args = data;
2216         struct compound_hdr hdr = {
2217                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218         };
2219
2220         encode_compound_hdr(xdr, req, &hdr);
2221         encode_sequence(xdr, &args->seq_args, &hdr);
2222         encode_putrootfh(xdr, &hdr);
2223         encode_getfh(xdr, &hdr);
2224         encode_getfattr(xdr, args->bitmask, &hdr);
2225         encode_nops(&hdr);
2226 }
2227
2228 /*
2229  * Encode REMOVE request
2230  */
2231 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2232                                 const void *data)
2233 {
2234         const struct nfs_removeargs *args = data;
2235         struct compound_hdr hdr = {
2236                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2237         };
2238
2239         encode_compound_hdr(xdr, req, &hdr);
2240         encode_sequence(xdr, &args->seq_args, &hdr);
2241         encode_putfh(xdr, args->fh, &hdr);
2242         encode_remove(xdr, &args->name, &hdr);
2243         encode_nops(&hdr);
2244 }
2245
2246 /*
2247  * Encode RENAME request
2248  */
2249 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2250                                 const void *data)
2251 {
2252         const struct nfs_renameargs *args = data;
2253         struct compound_hdr hdr = {
2254                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2255         };
2256
2257         encode_compound_hdr(xdr, req, &hdr);
2258         encode_sequence(xdr, &args->seq_args, &hdr);
2259         encode_putfh(xdr, args->old_dir, &hdr);
2260         encode_savefh(xdr, &hdr);
2261         encode_putfh(xdr, args->new_dir, &hdr);
2262         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2263         encode_nops(&hdr);
2264 }
2265
2266 /*
2267  * Encode LINK request
2268  */
2269 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2270                               const void *data)
2271 {
2272         const struct nfs4_link_arg *args = data;
2273         struct compound_hdr hdr = {
2274                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275         };
2276
2277         encode_compound_hdr(xdr, req, &hdr);
2278         encode_sequence(xdr, &args->seq_args, &hdr);
2279         encode_putfh(xdr, args->fh, &hdr);
2280         encode_savefh(xdr, &hdr);
2281         encode_putfh(xdr, args->dir_fh, &hdr);
2282         encode_link(xdr, args->name, &hdr);
2283         encode_restorefh(xdr, &hdr);
2284         encode_getfattr(xdr, args->bitmask, &hdr);
2285         encode_nops(&hdr);
2286 }
2287
2288 /*
2289  * Encode CREATE request
2290  */
2291 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2292                                 const void *data)
2293 {
2294         const struct nfs4_create_arg *args = data;
2295         struct compound_hdr hdr = {
2296                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2297         };
2298
2299         encode_compound_hdr(xdr, req, &hdr);
2300         encode_sequence(xdr, &args->seq_args, &hdr);
2301         encode_putfh(xdr, args->dir_fh, &hdr);
2302         encode_create(xdr, args, &hdr);
2303         encode_getfh(xdr, &hdr);
2304         encode_getfattr(xdr, args->bitmask, &hdr);
2305         encode_nops(&hdr);
2306 }
2307
2308 /*
2309  * Encode SYMLINK request
2310  */
2311 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2312                                  const void *data)
2313 {
2314         const struct nfs4_create_arg *args = data;
2315
2316         nfs4_xdr_enc_create(req, xdr, args);
2317 }
2318
2319 /*
2320  * Encode GETATTR request
2321  */
2322 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2323                                  const void *data)
2324 {
2325         const struct nfs4_getattr_arg *args = data;
2326         struct compound_hdr hdr = {
2327                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2328         };
2329
2330         encode_compound_hdr(xdr, req, &hdr);
2331         encode_sequence(xdr, &args->seq_args, &hdr);
2332         encode_putfh(xdr, args->fh, &hdr);
2333         encode_getfattr(xdr, args->bitmask, &hdr);
2334         encode_nops(&hdr);
2335 }
2336
2337 /*
2338  * Encode a CLOSE request
2339  */
2340 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2341                                const void *data)
2342 {
2343         const struct nfs_closeargs *args = data;
2344         struct compound_hdr hdr = {
2345                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2346         };
2347
2348         encode_compound_hdr(xdr, req, &hdr);
2349         encode_sequence(xdr, &args->seq_args, &hdr);
2350         encode_putfh(xdr, args->fh, &hdr);
2351         if (args->lr_args)
2352                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2353         if (args->bitmask != NULL)
2354                 encode_getfattr(xdr, args->bitmask, &hdr);
2355         encode_close(xdr, args, &hdr);
2356         encode_nops(&hdr);
2357 }
2358
2359 /*
2360  * Encode an OPEN request
2361  */
2362 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2363                               const void *data)
2364 {
2365         const struct nfs_openargs *args = data;
2366         struct compound_hdr hdr = {
2367                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368         };
2369
2370         encode_compound_hdr(xdr, req, &hdr);
2371         encode_sequence(xdr, &args->seq_args, &hdr);
2372         encode_putfh(xdr, args->fh, &hdr);
2373         encode_open(xdr, args, &hdr);
2374         encode_getfh(xdr, &hdr);
2375         if (args->access)
2376                 encode_access(xdr, args->access, &hdr);
2377         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2378         if (args->lg_args) {
2379                 encode_layoutget(xdr, args->lg_args, &hdr);
2380                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2381                                         args->lg_args->layout.pglen,
2382                                         hdr.replen - pagepad_maxsz);
2383         }
2384         encode_nops(&hdr);
2385 }
2386
2387 /*
2388  * Encode an OPEN_CONFIRM request
2389  */
2390 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2391                                       struct xdr_stream *xdr,
2392                                       const void *data)
2393 {
2394         const struct nfs_open_confirmargs *args = data;
2395         struct compound_hdr hdr = {
2396                 .nops   = 0,
2397         };
2398
2399         encode_compound_hdr(xdr, req, &hdr);
2400         encode_putfh(xdr, args->fh, &hdr);
2401         encode_open_confirm(xdr, args, &hdr);
2402         encode_nops(&hdr);
2403 }
2404
2405 /*
2406  * Encode an OPEN request with no attributes.
2407  */
2408 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2409                                      struct xdr_stream *xdr,
2410                                      const void *data)
2411 {
2412         const struct nfs_openargs *args = data;
2413         struct compound_hdr hdr = {
2414                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2415         };
2416
2417         encode_compound_hdr(xdr, req, &hdr);
2418         encode_sequence(xdr, &args->seq_args, &hdr);
2419         encode_putfh(xdr, args->fh, &hdr);
2420         encode_open(xdr, args, &hdr);
2421         if (args->access)
2422                 encode_access(xdr, args->access, &hdr);
2423         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2424         if (args->lg_args) {
2425                 encode_layoutget(xdr, args->lg_args, &hdr);
2426                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2427                                         args->lg_args->layout.pglen,
2428                                         hdr.replen - pagepad_maxsz);
2429         }
2430         encode_nops(&hdr);
2431 }
2432
2433 /*
2434  * Encode an OPEN_DOWNGRADE request
2435  */
2436 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2437                                         struct xdr_stream *xdr,
2438                                         const void *data)
2439 {
2440         const struct nfs_closeargs *args = data;
2441         struct compound_hdr hdr = {
2442                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2443         };
2444
2445         encode_compound_hdr(xdr, req, &hdr);
2446         encode_sequence(xdr, &args->seq_args, &hdr);
2447         encode_putfh(xdr, args->fh, &hdr);
2448         if (args->lr_args)
2449                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2450         encode_open_downgrade(xdr, args, &hdr);
2451         encode_nops(&hdr);
2452 }
2453
2454 /*
2455  * Encode a LOCK request
2456  */
2457 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2458                               const void *data)
2459 {
2460         const struct nfs_lock_args *args = data;
2461         struct compound_hdr hdr = {
2462                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2463         };
2464
2465         encode_compound_hdr(xdr, req, &hdr);
2466         encode_sequence(xdr, &args->seq_args, &hdr);
2467         encode_putfh(xdr, args->fh, &hdr);
2468         encode_lock(xdr, args, &hdr);
2469         encode_nops(&hdr);
2470 }
2471
2472 /*
2473  * Encode a LOCKT request
2474  */
2475 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2476                                const void *data)
2477 {
2478         const struct nfs_lockt_args *args = data;
2479         struct compound_hdr hdr = {
2480                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2481         };
2482
2483         encode_compound_hdr(xdr, req, &hdr);
2484         encode_sequence(xdr, &args->seq_args, &hdr);
2485         encode_putfh(xdr, args->fh, &hdr);
2486         encode_lockt(xdr, args, &hdr);
2487         encode_nops(&hdr);
2488 }
2489
2490 /*
2491  * Encode a LOCKU request
2492  */
2493 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2494                                const void *data)
2495 {
2496         const struct nfs_locku_args *args = data;
2497         struct compound_hdr hdr = {
2498                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2499         };
2500
2501         encode_compound_hdr(xdr, req, &hdr);
2502         encode_sequence(xdr, &args->seq_args, &hdr);
2503         encode_putfh(xdr, args->fh, &hdr);
2504         encode_locku(xdr, args, &hdr);
2505         encode_nops(&hdr);
2506 }
2507
2508 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2509                                            struct xdr_stream *xdr,
2510                                            const void *data)
2511 {
2512         const struct nfs_release_lockowner_args *args = data;
2513         struct compound_hdr hdr = {
2514                 .minorversion = 0,
2515         };
2516
2517         encode_compound_hdr(xdr, req, &hdr);
2518         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2519         encode_nops(&hdr);
2520 }
2521
2522 /*
2523  * Encode a READLINK request
2524  */
2525 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2526                                   const void *data)
2527 {
2528         const struct nfs4_readlink *args = data;
2529         struct compound_hdr hdr = {
2530                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2531         };
2532
2533         encode_compound_hdr(xdr, req, &hdr);
2534         encode_sequence(xdr, &args->seq_args, &hdr);
2535         encode_putfh(xdr, args->fh, &hdr);
2536         encode_readlink(xdr, args, req, &hdr);
2537
2538         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2539                                 args->pglen, hdr.replen - pagepad_maxsz);
2540         encode_nops(&hdr);
2541 }
2542
2543 /*
2544  * Encode a READDIR request
2545  */
2546 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2547                                  const void *data)
2548 {
2549         const struct nfs4_readdir_arg *args = data;
2550         struct compound_hdr hdr = {
2551                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2552         };
2553
2554         encode_compound_hdr(xdr, req, &hdr);
2555         encode_sequence(xdr, &args->seq_args, &hdr);
2556         encode_putfh(xdr, args->fh, &hdr);
2557         encode_readdir(xdr, args, req, &hdr);
2558
2559         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2560                                 args->count, hdr.replen - pagepad_maxsz);
2561         encode_nops(&hdr);
2562 }
2563
2564 /*
2565  * Encode a READ request
2566  */
2567 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2568                               const void *data)
2569 {
2570         const struct nfs_pgio_args *args = data;
2571         struct compound_hdr hdr = {
2572                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2573         };
2574
2575         encode_compound_hdr(xdr, req, &hdr);
2576         encode_sequence(xdr, &args->seq_args, &hdr);
2577         encode_putfh(xdr, args->fh, &hdr);
2578         encode_read(xdr, args, &hdr);
2579
2580         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2581                                 args->count, hdr.replen - pagepad_maxsz);
2582         req->rq_rcv_buf.flags |= XDRBUF_READ;
2583         encode_nops(&hdr);
2584 }
2585
2586 /*
2587  * Encode an SETATTR request
2588  */
2589 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2590                                  const void *data)
2591 {
2592         const struct nfs_setattrargs *args = data;
2593         struct compound_hdr hdr = {
2594                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2595         };
2596
2597         encode_compound_hdr(xdr, req, &hdr);
2598         encode_sequence(xdr, &args->seq_args, &hdr);
2599         encode_putfh(xdr, args->fh, &hdr);
2600         encode_setattr(xdr, args, args->server, &hdr);
2601         encode_getfattr(xdr, args->bitmask, &hdr);
2602         encode_nops(&hdr);
2603 }
2604
2605 /*
2606  * Encode a GETACL request
2607  */
2608 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2609                                 const void *data)
2610 {
2611         const struct nfs_getaclargs *args = data;
2612         struct compound_hdr hdr = {
2613                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2614         };
2615         __u32 nfs4_acl_bitmap[2];
2616         uint32_t replen;
2617
2618         nfs4_acltype_to_bitmap(args->acl_type, nfs4_acl_bitmap);
2619
2620         encode_compound_hdr(xdr, req, &hdr);
2621         encode_sequence(xdr, &args->seq_args, &hdr);
2622         encode_putfh(xdr, args->fh, &hdr);
2623         replen = hdr.replen + op_decode_hdr_maxsz;
2624         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2625                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2626
2627         rpc_prepare_reply_pages(req, args->acl_pages, 0,
2628                                 args->acl_len, replen);
2629         encode_nops(&hdr);
2630 }
2631
2632 /*
2633  * Encode a WRITE request
2634  */
2635 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2636                                const void *data)
2637 {
2638         const struct nfs_pgio_args *args = data;
2639         struct compound_hdr hdr = {
2640                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2641         };
2642
2643         encode_compound_hdr(xdr, req, &hdr);
2644         encode_sequence(xdr, &args->seq_args, &hdr);
2645         encode_putfh(xdr, args->fh, &hdr);
2646         encode_write(xdr, args, &hdr);
2647         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2648         if (args->bitmask)
2649                 encode_getfattr(xdr, args->bitmask, &hdr);
2650         encode_nops(&hdr);
2651 }
2652
2653 /*
2654  *  a COMMIT request
2655  */
2656 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2657                                 const void *data)
2658 {
2659         const struct nfs_commitargs *args = data;
2660         struct compound_hdr hdr = {
2661                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2662         };
2663
2664         encode_compound_hdr(xdr, req, &hdr);
2665         encode_sequence(xdr, &args->seq_args, &hdr);
2666         encode_putfh(xdr, args->fh, &hdr);
2667         encode_commit(xdr, args, &hdr);
2668         encode_nops(&hdr);
2669 }
2670
2671 /*
2672  * FSINFO request
2673  */
2674 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2675                                 const void *data)
2676 {
2677         const struct nfs4_fsinfo_arg *args = data;
2678         struct compound_hdr hdr = {
2679                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2680         };
2681
2682         encode_compound_hdr(xdr, req, &hdr);
2683         encode_sequence(xdr, &args->seq_args, &hdr);
2684         encode_putfh(xdr, args->fh, &hdr);
2685         encode_fsinfo(xdr, args->bitmask, &hdr);
2686         encode_nops(&hdr);
2687 }
2688
2689 /*
2690  * a PATHCONF request
2691  */
2692 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2693                                   const void *data)
2694 {
2695         const struct nfs4_pathconf_arg *args = data;
2696         struct compound_hdr hdr = {
2697                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2698         };
2699
2700         encode_compound_hdr(xdr, req, &hdr);
2701         encode_sequence(xdr, &args->seq_args, &hdr);
2702         encode_putfh(xdr, args->fh, &hdr);
2703         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2704                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2705         encode_nops(&hdr);
2706 }
2707
2708 /*
2709  * a STATFS request
2710  */
2711 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2712                                 const void *data)
2713 {
2714         const struct nfs4_statfs_arg *args = data;
2715         struct compound_hdr hdr = {
2716                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2717         };
2718
2719         encode_compound_hdr(xdr, req, &hdr);
2720         encode_sequence(xdr, &args->seq_args, &hdr);
2721         encode_putfh(xdr, args->fh, &hdr);
2722         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2723                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2724         encode_nops(&hdr);
2725 }
2726
2727 /*
2728  * GETATTR_BITMAP request
2729  */
2730 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2731                                      struct xdr_stream *xdr,
2732                                      const void *data)
2733 {
2734         const struct nfs4_server_caps_arg *args = data;
2735         const u32 *bitmask = args->bitmask;
2736         struct compound_hdr hdr = {
2737                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2738         };
2739
2740         encode_compound_hdr(xdr, req, &hdr);
2741         encode_sequence(xdr, &args->seq_args, &hdr);
2742         encode_putfh(xdr, args->fhandle, &hdr);
2743         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2744         encode_nops(&hdr);
2745 }
2746
2747 /*
2748  * a RENEW request
2749  */
2750 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2751                                const void *data)
2752
2753 {
2754         const struct nfs_client *clp = data;
2755         struct compound_hdr hdr = {
2756                 .nops   = 0,
2757         };
2758
2759         encode_compound_hdr(xdr, req, &hdr);
2760         encode_renew(xdr, clp->cl_clientid, &hdr);
2761         encode_nops(&hdr);
2762 }
2763
2764 /*
2765  * a SETCLIENTID request
2766  */
2767 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2768                                      struct xdr_stream *xdr,
2769                                      const void *data)
2770 {
2771         const struct nfs4_setclientid *sc = data;
2772         struct compound_hdr hdr = {
2773                 .nops   = 0,
2774         };
2775
2776         encode_compound_hdr(xdr, req, &hdr);
2777         encode_setclientid(xdr, sc, &hdr);
2778         encode_nops(&hdr);
2779 }
2780
2781 /*
2782  * a SETCLIENTID_CONFIRM request
2783  */
2784 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2785                                              struct xdr_stream *xdr,
2786                                              const void *data)
2787 {
2788         const struct nfs4_setclientid_res *arg = data;
2789         struct compound_hdr hdr = {
2790                 .nops   = 0,
2791         };
2792
2793         encode_compound_hdr(xdr, req, &hdr);
2794         encode_setclientid_confirm(xdr, arg, &hdr);
2795         encode_nops(&hdr);
2796 }
2797
2798 /*
2799  * DELEGRETURN request
2800  */
2801 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2802                                      struct xdr_stream *xdr,
2803                                      const void *data)
2804 {
2805         const struct nfs4_delegreturnargs *args = data;
2806         struct compound_hdr hdr = {
2807                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2808         };
2809
2810         encode_compound_hdr(xdr, req, &hdr);
2811         encode_sequence(xdr, &args->seq_args, &hdr);
2812         encode_putfh(xdr, args->fhandle, &hdr);
2813         if (args->lr_args)
2814                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2815         if (args->bitmask)
2816                 encode_getfattr(xdr, args->bitmask, &hdr);
2817         encode_delegreturn(xdr, args->stateid, &hdr);
2818         encode_nops(&hdr);
2819 }
2820
2821 /*
2822  * Encode FS_LOCATIONS request
2823  */
2824 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2825                                       struct xdr_stream *xdr,
2826                                       const void *data)
2827 {
2828         const struct nfs4_fs_locations_arg *args = data;
2829         struct compound_hdr hdr = {
2830                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2831         };
2832         uint32_t replen;
2833
2834         encode_compound_hdr(xdr, req, &hdr);
2835         encode_sequence(xdr, &args->seq_args, &hdr);
2836         if (args->migration) {
2837                 encode_putfh(xdr, args->fh, &hdr);
2838                 replen = hdr.replen;
2839                 encode_fs_locations(xdr, args->bitmask, &hdr);
2840                 if (args->renew)
2841                         encode_renew(xdr, args->clientid, &hdr);
2842         } else {
2843                 encode_putfh(xdr, args->dir_fh, &hdr);
2844                 encode_lookup(xdr, args->name, &hdr);
2845                 replen = hdr.replen;
2846                 encode_fs_locations(xdr, args->bitmask, &hdr);
2847         }
2848
2849         rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2850                                 PAGE_SIZE, replen);
2851         encode_nops(&hdr);
2852 }
2853
2854 /*
2855  * Encode SECINFO request
2856  */
2857 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2858                                 struct xdr_stream *xdr,
2859                                 const void *data)
2860 {
2861         const struct nfs4_secinfo_arg *args = data;
2862         struct compound_hdr hdr = {
2863                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2864         };
2865
2866         encode_compound_hdr(xdr, req, &hdr);
2867         encode_sequence(xdr, &args->seq_args, &hdr);
2868         encode_putfh(xdr, args->dir_fh, &hdr);
2869         encode_secinfo(xdr, args->name, &hdr);
2870         encode_nops(&hdr);
2871 }
2872
2873 /*
2874  * Encode FSID_PRESENT request
2875  */
2876 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2877                                       struct xdr_stream *xdr,
2878                                       const void *data)
2879 {
2880         const struct nfs4_fsid_present_arg *args = data;
2881         struct compound_hdr hdr = {
2882                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2883         };
2884
2885         encode_compound_hdr(xdr, req, &hdr);
2886         encode_sequence(xdr, &args->seq_args, &hdr);
2887         encode_putfh(xdr, args->fh, &hdr);
2888         encode_getfh(xdr, &hdr);
2889         if (args->renew)
2890                 encode_renew(xdr, args->clientid, &hdr);
2891         encode_nops(&hdr);
2892 }
2893
2894 #if defined(CONFIG_NFS_V4_1)
2895 /*
2896  * BIND_CONN_TO_SESSION request
2897  */
2898 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2899                                 struct xdr_stream *xdr,
2900                                 const void *data)
2901 {
2902         const struct nfs41_bind_conn_to_session_args *args = data;
2903         struct compound_hdr hdr = {
2904                 .minorversion = args->client->cl_mvops->minor_version,
2905         };
2906
2907         encode_compound_hdr(xdr, req, &hdr);
2908         encode_bind_conn_to_session(xdr, args, &hdr);
2909         encode_nops(&hdr);
2910 }
2911
2912 /*
2913  * EXCHANGE_ID request
2914  */
2915 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2916                                      struct xdr_stream *xdr,
2917                                      const void *data)
2918 {
2919         const struct nfs41_exchange_id_args *args = data;
2920         struct compound_hdr hdr = {
2921                 .minorversion = args->client->cl_mvops->minor_version,
2922         };
2923
2924         encode_compound_hdr(xdr, req, &hdr);
2925         encode_exchange_id(xdr, args, &hdr);
2926         encode_nops(&hdr);
2927 }
2928
2929 /*
2930  * a CREATE_SESSION request
2931  */
2932 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2933                                         struct xdr_stream *xdr,
2934                                         const void *data)
2935 {
2936         const struct nfs41_create_session_args *args = data;
2937         struct compound_hdr hdr = {
2938                 .minorversion = args->client->cl_mvops->minor_version,
2939         };
2940
2941         encode_compound_hdr(xdr, req, &hdr);
2942         encode_create_session(xdr, args, &hdr);
2943         encode_nops(&hdr);
2944 }
2945
2946 /*
2947  * a DESTROY_SESSION request
2948  */
2949 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2950                                          struct xdr_stream *xdr,
2951                                          const void *data)
2952 {
2953         const struct nfs4_session *session = data;
2954         struct compound_hdr hdr = {
2955                 .minorversion = session->clp->cl_mvops->minor_version,
2956         };
2957
2958         encode_compound_hdr(xdr, req, &hdr);
2959         encode_destroy_session(xdr, session, &hdr);
2960         encode_nops(&hdr);
2961 }
2962
2963 /*
2964  * a DESTROY_CLIENTID request
2965  */
2966 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2967                                          struct xdr_stream *xdr,
2968                                          const void *data)
2969 {
2970         const struct nfs_client *clp = data;
2971         struct compound_hdr hdr = {
2972                 .minorversion = clp->cl_mvops->minor_version,
2973         };
2974
2975         encode_compound_hdr(xdr, req, &hdr);
2976         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2977         encode_nops(&hdr);
2978 }
2979
2980 /*
2981  * a SEQUENCE request
2982  */
2983 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2984                                   const void *data)
2985 {
2986         const struct nfs4_sequence_args *args = data;
2987         struct compound_hdr hdr = {
2988                 .minorversion = nfs4_xdr_minorversion(args),
2989         };
2990
2991         encode_compound_hdr(xdr, req, &hdr);
2992         encode_sequence(xdr, args, &hdr);
2993         encode_nops(&hdr);
2994 }
2995
2996 #endif
2997
2998 /*
2999  * a GET_LEASE_TIME request
3000  */
3001 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
3002                                         struct xdr_stream *xdr,
3003                                         const void *data)
3004 {
3005         const struct nfs4_get_lease_time_args *args = data;
3006         struct compound_hdr hdr = {
3007                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
3008         };
3009         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
3010
3011         encode_compound_hdr(xdr, req, &hdr);
3012         encode_sequence(xdr, &args->la_seq_args, &hdr);
3013         encode_putrootfh(xdr, &hdr);
3014         encode_fsinfo(xdr, lease_bitmap, &hdr);
3015         encode_nops(&hdr);
3016 }
3017
3018 #ifdef CONFIG_NFS_V4_1
3019
3020 /*
3021  * a RECLAIM_COMPLETE request
3022  */
3023 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
3024                                           struct xdr_stream *xdr,
3025                                           const void *data)
3026 {
3027         const struct nfs41_reclaim_complete_args *args = data;
3028         struct compound_hdr hdr = {
3029                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
3030         };
3031
3032         encode_compound_hdr(xdr, req, &hdr);
3033         encode_sequence(xdr, &args->seq_args, &hdr);
3034         encode_reclaim_complete(xdr, args, &hdr);
3035         encode_nops(&hdr);
3036 }
3037
3038 /*
3039  * Encode GETDEVICEINFO request
3040  */
3041 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3042                                        struct xdr_stream *xdr,
3043                                        const void *data)
3044 {
3045         const struct nfs4_getdeviceinfo_args *args = data;
3046         struct compound_hdr hdr = {
3047                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3048         };
3049         uint32_t replen;
3050
3051         encode_compound_hdr(xdr, req, &hdr);
3052         encode_sequence(xdr, &args->seq_args, &hdr);
3053
3054         replen = hdr.replen + op_decode_hdr_maxsz + 2;
3055
3056         encode_getdeviceinfo(xdr, args, &hdr);
3057
3058         /* set up reply kvec. device_addr4 opaque data is read into the
3059          * pages */
3060         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3061                                 args->pdev->pglen, replen);
3062         encode_nops(&hdr);
3063 }
3064
3065 /*
3066  *  Encode LAYOUTGET request
3067  */
3068 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3069                                    struct xdr_stream *xdr,
3070                                    const void *data)
3071 {
3072         const struct nfs4_layoutget_args *args = data;
3073         struct compound_hdr hdr = {
3074                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3075         };
3076
3077         encode_compound_hdr(xdr, req, &hdr);
3078         encode_sequence(xdr, &args->seq_args, &hdr);
3079         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3080         encode_layoutget(xdr, args, &hdr);
3081
3082         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3083                                 args->layout.pglen, hdr.replen - pagepad_maxsz);
3084         encode_nops(&hdr);
3085 }
3086
3087 /*
3088  *  Encode LAYOUTCOMMIT request
3089  */
3090 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3091                                       struct xdr_stream *xdr,
3092                                       const void *priv)
3093 {
3094         const struct nfs4_layoutcommit_args *args = priv;
3095         struct nfs4_layoutcommit_data *data =
3096                 container_of(args, struct nfs4_layoutcommit_data, args);
3097         struct compound_hdr hdr = {
3098                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3099         };
3100
3101         encode_compound_hdr(xdr, req, &hdr);
3102         encode_sequence(xdr, &args->seq_args, &hdr);
3103         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3104         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3105         encode_getfattr(xdr, args->bitmask, &hdr);
3106         encode_nops(&hdr);
3107 }
3108
3109 /*
3110  * Encode LAYOUTRETURN request
3111  */
3112 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3113                                       struct xdr_stream *xdr,
3114                                       const void *data)
3115 {
3116         const struct nfs4_layoutreturn_args *args = data;
3117         struct compound_hdr hdr = {
3118                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3119         };
3120
3121         encode_compound_hdr(xdr, req, &hdr);
3122         encode_sequence(xdr, &args->seq_args, &hdr);
3123         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3124         encode_layoutreturn(xdr, args, &hdr);
3125         encode_nops(&hdr);
3126 }
3127
3128 /*
3129  * Encode SECINFO_NO_NAME request
3130  */
3131 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3132                                         struct xdr_stream *xdr,
3133                                         const void *data)
3134 {
3135         const struct nfs41_secinfo_no_name_args *args = data;
3136         struct compound_hdr hdr = {
3137                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3138         };
3139
3140         encode_compound_hdr(xdr, req, &hdr);
3141         encode_sequence(xdr, &args->seq_args, &hdr);
3142         encode_putrootfh(xdr, &hdr);
3143         encode_secinfo_no_name(xdr, args, &hdr);
3144         encode_nops(&hdr);
3145 }
3146
3147 /*
3148  *  Encode TEST_STATEID request
3149  */
3150 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3151                                       struct xdr_stream *xdr,
3152                                       const void *data)
3153 {
3154         const struct nfs41_test_stateid_args *args = data;
3155         struct compound_hdr hdr = {
3156                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3157         };
3158
3159         encode_compound_hdr(xdr, req, &hdr);
3160         encode_sequence(xdr, &args->seq_args, &hdr);
3161         encode_test_stateid(xdr, args, &hdr);
3162         encode_nops(&hdr);
3163 }
3164
3165 /*
3166  *  Encode FREE_STATEID request
3167  */
3168 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3169                                      struct xdr_stream *xdr,
3170                                      const void *data)
3171 {
3172         const struct nfs41_free_stateid_args *args = data;
3173         struct compound_hdr hdr = {
3174                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3175         };
3176
3177         encode_compound_hdr(xdr, req, &hdr);
3178         encode_sequence(xdr, &args->seq_args, &hdr);
3179         encode_free_stateid(xdr, args, &hdr);
3180         encode_nops(&hdr);
3181 }
3182 #endif /* CONFIG_NFS_V4_1 */
3183
3184 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3185 {
3186         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3187                         NFS4_OPAQUE_LIMIT);
3188         if (unlikely(ret < 0))
3189                 return -EIO;
3190         *len = ret;
3191         return 0;
3192 }
3193
3194 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3195 {
3196         ssize_t ret;
3197         void *ptr;
3198         u32 tmp;
3199
3200         if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3201                 return -EIO;
3202         hdr->status = tmp;
3203
3204         ret = xdr_stream_decode_opaque_inline(xdr, &ptr, NFS4_OPAQUE_LIMIT);
3205         if (ret < 0)
3206                 return -EIO;
3207         hdr->taglen = ret;
3208         hdr->tag = ptr;
3209
3210         if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3211                 return -EIO;
3212         hdr->nops = tmp;
3213         if (unlikely(hdr->nops < 1))
3214                 return nfs4_stat_to_errno(hdr->status);
3215         return 0;
3216 }
3217
3218 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3219                 int *nfs_retval)
3220 {
3221         __be32 *p;
3222         uint32_t opnum;
3223         int32_t nfserr;
3224
3225         p = xdr_inline_decode(xdr, 8);
3226         if (unlikely(!p))
3227                 goto out_overflow;
3228         opnum = be32_to_cpup(p++);
3229         if (unlikely(opnum != expected))
3230                 goto out_bad_operation;
3231         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3232                 goto out_status;
3233         *nfs_retval = 0;
3234         return true;
3235 out_status:
3236         nfserr = be32_to_cpup(p);
3237         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3238         *nfs_retval = nfs4_stat_to_errno(nfserr);
3239         return true;
3240 out_bad_operation:
3241         trace_nfs4_xdr_bad_operation(xdr, opnum, expected);
3242         *nfs_retval = -EREMOTEIO;
3243         return false;
3244 out_overflow:
3245         *nfs_retval = -EIO;
3246         return false;
3247 }
3248
3249 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3250 {
3251         int retval;
3252
3253         __decode_op_hdr(xdr, expected, &retval);
3254         return retval;
3255 }
3256
3257 /* Dummy routine */
3258 static int decode_ace(struct xdr_stream *xdr, void *ace)
3259 {
3260         __be32 *p;
3261         unsigned int strlen;
3262         char *str;
3263
3264         p = xdr_inline_decode(xdr, 12);
3265         if (unlikely(!p))
3266                 return -EIO;
3267         return decode_opaque_inline(xdr, &strlen, &str);
3268 }
3269
3270 static ssize_t
3271 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3272 {
3273         ssize_t ret;
3274
3275         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3276         if (likely(ret >= 0))
3277                 return ret;
3278         if (ret != -EMSGSIZE)
3279                 return -EIO;
3280         return sz;
3281 }
3282
3283 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3284 {
3285         ssize_t ret;
3286         ret = decode_bitmap4(xdr, bitmap, 3);
3287         return ret < 0 ? ret : 0;
3288 }
3289
3290 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3291 {
3292         __be32 *p;
3293
3294         p = xdr_inline_decode(xdr, 4);
3295         if (unlikely(!p))
3296                 return -EIO;
3297         *attrlen = be32_to_cpup(p);
3298         *savep = xdr_stream_pos(xdr);
3299         return 0;
3300 }
3301
3302 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3303 {
3304         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3305                 int ret;
3306                 ret = decode_attr_bitmap(xdr, bitmask);
3307                 if (unlikely(ret < 0))
3308                         return ret;
3309                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3310         } else
3311                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3312         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3313                 bitmask[0], bitmask[1], bitmask[2]);
3314         return 0;
3315 }
3316
3317 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3318 {
3319         __be32 *p;
3320         int ret = 0;
3321
3322         *type = 0;
3323         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3324                 return -EIO;
3325         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3326                 p = xdr_inline_decode(xdr, 4);
3327                 if (unlikely(!p))
3328                         return -EIO;
3329                 *type = be32_to_cpup(p);
3330                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3331                         dprintk("%s: bad type %d\n", __func__, *type);
3332                         return -EIO;
3333                 }
3334                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3335                 ret = NFS_ATTR_FATTR_TYPE;
3336         }
3337         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3338         return ret;
3339 }
3340
3341 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3342                                       uint32_t *bitmap, uint32_t *type)
3343 {
3344         __be32 *p;
3345
3346         *type = 0;
3347         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3348                 return -EIO;
3349         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3350                 p = xdr_inline_decode(xdr, 4);
3351                 if (unlikely(!p))
3352                         return -EIO;
3353                 *type = be32_to_cpup(p);
3354                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3355         }
3356         dprintk("%s: expire type=0x%x\n", __func__, *type);
3357         return 0;
3358 }
3359
3360 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3361 {
3362         __be32 *p;
3363         int ret = 0;
3364
3365         *change = 0;
3366         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3367                 return -EIO;
3368         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3369                 p = xdr_inline_decode(xdr, 8);
3370                 if (unlikely(!p))
3371                         return -EIO;
3372                 xdr_decode_hyper(p, change);
3373                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3374                 ret = NFS_ATTR_FATTR_CHANGE;
3375         }
3376         dprintk("%s: change attribute=%Lu\n", __func__,
3377                         (unsigned long long)*change);
3378         return ret;
3379 }
3380
3381 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3382 {
3383         __be32 *p;
3384         int ret = 0;
3385
3386         *size = 0;
3387         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3388                 return -EIO;
3389         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3390                 p = xdr_inline_decode(xdr, 8);
3391                 if (unlikely(!p))
3392                         return -EIO;
3393                 xdr_decode_hyper(p, size);
3394                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3395                 ret = NFS_ATTR_FATTR_SIZE;
3396         }
3397         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3398         return ret;
3399 }
3400
3401 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3402 {
3403         __be32 *p;
3404
3405         *res = 0;
3406         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3407                 return -EIO;
3408         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3409                 p = xdr_inline_decode(xdr, 4);
3410                 if (unlikely(!p))
3411                         return -EIO;
3412                 *res = be32_to_cpup(p);
3413                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3414         }
3415         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3416         return 0;
3417 }
3418
3419 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3420 {
3421         __be32 *p;
3422
3423         *res = 0;
3424         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3425                 return -EIO;
3426         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3427                 p = xdr_inline_decode(xdr, 4);
3428                 if (unlikely(!p))
3429                         return -EIO;
3430                 *res = be32_to_cpup(p);
3431                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3432         }
3433         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3434         return 0;
3435 }
3436
3437 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3438 {
3439         __be32 *p;
3440         int ret = 0;
3441
3442         fsid->major = 0;
3443         fsid->minor = 0;
3444         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3445                 return -EIO;
3446         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3447                 p = xdr_inline_decode(xdr, 16);
3448                 if (unlikely(!p))
3449                         return -EIO;
3450                 p = xdr_decode_hyper(p, &fsid->major);
3451                 xdr_decode_hyper(p, &fsid->minor);
3452                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3453                 ret = NFS_ATTR_FATTR_FSID;
3454         }
3455         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3456                         (unsigned long long)fsid->major,
3457                         (unsigned long long)fsid->minor);
3458         return ret;
3459 }
3460
3461 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3462 {
3463         __be32 *p;
3464
3465         *res = 60;
3466         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3467                 return -EIO;
3468         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3469                 p = xdr_inline_decode(xdr, 4);
3470                 if (unlikely(!p))
3471                         return -EIO;
3472                 *res = be32_to_cpup(p);
3473                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3474         }
3475         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3476         return 0;
3477 }
3478
3479 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3480 {
3481         __be32 *p;
3482
3483         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3484                 return -EIO;
3485         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3486                 p = xdr_inline_decode(xdr, 4);
3487                 if (unlikely(!p))
3488                         return -EIO;
3489                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3490                 *res = -be32_to_cpup(p);
3491         }
3492         return 0;
3493 }
3494
3495 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3496                                  uint32_t *bitmap, uint32_t *bitmask)
3497 {
3498         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3499                 int ret;
3500                 ret = decode_attr_bitmap(xdr, bitmask);
3501                 if (unlikely(ret < 0))
3502                         return ret;
3503                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3504         } else
3505                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3506         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3507                 bitmask[0], bitmask[1], bitmask[2]);
3508         return 0;
3509 }
3510
3511 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3512 {
3513         __be32 *p;
3514         u32 len;
3515
3516         if (fh != NULL)
3517                 memset(fh, 0, sizeof(*fh));
3518
3519         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3520                 return -EIO;
3521         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3522                 p = xdr_inline_decode(xdr, 4);
3523                 if (unlikely(!p))
3524                         return -EIO;
3525                 len = be32_to_cpup(p);
3526                 if (len > NFS4_FHSIZE || len == 0) {
3527                         trace_nfs4_xdr_bad_filehandle(xdr, OP_READDIR,
3528                                                       NFS4ERR_BADHANDLE);
3529                         return -EREMOTEIO;
3530                 }
3531                 p = xdr_inline_decode(xdr, len);
3532                 if (unlikely(!p))
3533                         return -EIO;
3534                 if (fh != NULL) {
3535                         memcpy(fh->data, p, len);
3536                         fh->size = len;
3537                 }
3538                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3539         }
3540         return 0;
3541 }
3542
3543 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3544 {
3545         __be32 *p;
3546
3547         *res = 0;
3548         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3549                 return -EIO;
3550         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3551                 p = xdr_inline_decode(xdr, 4);
3552                 if (unlikely(!p))
3553                         return -EIO;
3554                 *res = be32_to_cpup(p);
3555                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3556         }
3557         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3558         return 0;
3559 }
3560
3561 static int decode_attr_case_insensitive(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3562 {
3563         __be32 *p;
3564
3565         *res = 0;
3566         if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_INSENSITIVE - 1U)))
3567                 return -EIO;
3568         if (likely(bitmap[0] & FATTR4_WORD0_CASE_INSENSITIVE)) {
3569                 p = xdr_inline_decode(xdr, 4);
3570                 if (unlikely(!p))
3571                         return -EIO;
3572                 *res = be32_to_cpup(p);
3573                 bitmap[0] &= ~FATTR4_WORD0_CASE_INSENSITIVE;
3574         }
3575         dprintk("%s: case_insensitive=%s\n", __func__, *res == 0 ? "false" : "true");
3576         return 0;
3577 }
3578
3579 static int decode_attr_case_preserving(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3580 {
3581         __be32 *p;
3582
3583         *res = 0;
3584         if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_PRESERVING - 1U)))
3585                 return -EIO;
3586         if (likely(bitmap[0] & FATTR4_WORD0_CASE_PRESERVING)) {
3587                 p = xdr_inline_decode(xdr, 4);
3588                 if (unlikely(!p))
3589                         return -EIO;
3590                 *res = be32_to_cpup(p);
3591                 bitmap[0] &= ~FATTR4_WORD0_CASE_PRESERVING;
3592         }
3593         dprintk("%s: case_preserving=%s\n", __func__, *res == 0 ? "false" : "true");
3594         return 0;
3595 }
3596
3597 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3598 {
3599         __be32 *p;
3600         int ret = 0;
3601
3602         *fileid = 0;
3603         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3604                 return -EIO;
3605         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3606                 p = xdr_inline_decode(xdr, 8);
3607                 if (unlikely(!p))
3608                         return -EIO;
3609                 xdr_decode_hyper(p, fileid);
3610                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3611                 ret = NFS_ATTR_FATTR_FILEID;
3612         }
3613         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3614         return ret;
3615 }
3616
3617 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3618 {
3619         __be32 *p;
3620         int ret = 0;
3621
3622         *fileid = 0;
3623         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3624                 return -EIO;
3625         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3626                 p = xdr_inline_decode(xdr, 8);
3627                 if (unlikely(!p))
3628                         return -EIO;
3629                 xdr_decode_hyper(p, fileid);
3630                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3631                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3632         }
3633         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3634         return ret;
3635 }
3636
3637 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3638 {
3639         __be32 *p;
3640         int status = 0;
3641
3642         *res = 0;
3643         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3644                 return -EIO;
3645         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3646                 p = xdr_inline_decode(xdr, 8);
3647                 if (unlikely(!p))
3648                         return -EIO;
3649                 xdr_decode_hyper(p, res);
3650                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3651         }
3652         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3653         return status;
3654 }
3655
3656 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3657 {
3658         __be32 *p;
3659         int status = 0;
3660
3661         *res = 0;
3662         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3663                 return -EIO;
3664         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3665                 p = xdr_inline_decode(xdr, 8);
3666                 if (unlikely(!p))
3667                         return -EIO;
3668                 xdr_decode_hyper(p, res);
3669                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3670         }
3671         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3672         return status;
3673 }
3674
3675 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3676 {
3677         __be32 *p;
3678         int status = 0;
3679
3680         *res = 0;
3681         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3682                 return -EIO;
3683         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3684                 p = xdr_inline_decode(xdr, 8);
3685                 if (unlikely(!p))
3686                         return -EIO;
3687                 xdr_decode_hyper(p, res);
3688                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3689         }
3690         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3691         return status;
3692 }
3693
3694 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3695 {
3696         u32 n;
3697         __be32 *p;
3698         int status = 0;
3699
3700         p = xdr_inline_decode(xdr, 4);
3701         if (unlikely(!p))
3702                 return -EIO;
3703         n = be32_to_cpup(p);
3704         if (n == 0)
3705                 goto root_path;
3706         dprintk("pathname4: ");
3707         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3708                 dprintk("cannot parse %d components in path\n", n);
3709                 goto out_eio;
3710         }
3711         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3712                 struct nfs4_string *component = &path->components[path->ncomponents];
3713                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3714                 if (unlikely(status != 0))
3715                         goto out_eio;
3716                 ifdebug (XDR)
3717                         pr_cont("%s%.*s ",
3718                                 (path->ncomponents != n ? "/ " : ""),
3719                                 component->len, component->data);
3720         }
3721 out:
3722         return status;
3723 root_path:
3724 /* a root pathname is sent as a zero component4 */
3725         path->ncomponents = 1;
3726         path->components[0].len=0;
3727         path->components[0].data=NULL;
3728         dprintk("pathname4: /\n");
3729         goto out;
3730 out_eio:
3731         dprintk(" status %d", status);
3732         status = -EIO;
3733         goto out;
3734 }
3735
3736 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3737 {
3738         int n;
3739         __be32 *p;
3740         int status = -EIO;
3741
3742         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3743                 goto out;
3744         status = 0;
3745         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3746                 goto out;
3747         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3748         status = -EIO;
3749         /* Ignore borken servers that return unrequested attrs */
3750         if (unlikely(res == NULL))
3751                 goto out;
3752         dprintk("%s: fsroot:\n", __func__);
3753         status = decode_pathname(xdr, &res->fs_path);
3754         if (unlikely(status != 0))
3755                 goto out;
3756         p = xdr_inline_decode(xdr, 4);
3757         if (unlikely(!p))
3758                 goto out_eio;
3759         n = be32_to_cpup(p);
3760         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3761                 u32 m;
3762                 struct nfs4_fs_location *loc;
3763
3764                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3765                         break;
3766                 loc = &res->locations[res->nlocations];
3767                 p = xdr_inline_decode(xdr, 4);
3768                 if (unlikely(!p))
3769                         goto out_eio;
3770                 m = be32_to_cpup(p);
3771
3772                 dprintk("%s: servers:\n", __func__);
3773                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3774                         struct nfs4_string *server;
3775
3776                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3777                                 unsigned int i;
3778                                 dprintk("%s: using first %u of %u servers "
3779                                         "returned for location %u\n",
3780                                                 __func__,
3781                                                 NFS4_FS_LOCATION_MAXSERVERS,
3782                                                 m, res->nlocations);
3783                                 for (i = loc->nservers; i < m; i++) {
3784                                         unsigned int len;
3785                                         char *data;
3786                                         status = decode_opaque_inline(xdr, &len, &data);
3787                                         if (unlikely(status != 0))
3788                                                 goto out_eio;
3789                                 }
3790                                 break;
3791                         }
3792                         server = &loc->servers[loc->nservers];
3793                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3794                         if (unlikely(status != 0))
3795                                 goto out_eio;
3796                         dprintk("%s ", server->data);
3797                 }
3798                 status = decode_pathname(xdr, &loc->rootpath);
3799                 if (unlikely(status != 0))
3800                         goto out_eio;
3801         }
3802         if (res->nlocations != 0)
3803                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3804 out:
3805         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3806         return status;
3807 out_eio:
3808         status = -EIO;
3809         goto out;
3810 }
3811
3812 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3813 {
3814         __be32 *p;
3815         int status = 0;
3816
3817         *res = 0;
3818         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3819                 return -EIO;
3820         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3821                 p = xdr_inline_decode(xdr, 8);
3822                 if (unlikely(!p))
3823                         return -EIO;
3824                 xdr_decode_hyper(p, res);
3825                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3826         }
3827         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3828         return status;
3829 }
3830
3831 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3832 {
3833         __be32 *p;
3834         int status = 0;
3835
3836         *maxlink = 1;
3837         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3838                 return -EIO;
3839         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3840                 p = xdr_inline_decode(xdr, 4);
3841                 if (unlikely(!p))
3842                         return -EIO;
3843                 *maxlink = be32_to_cpup(p);
3844                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3845         }
3846         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3847         return status;
3848 }
3849
3850 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3851 {
3852         __be32 *p;
3853         int status = 0;
3854
3855         *maxname = 1024;
3856         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3857                 return -EIO;
3858         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3859                 p = xdr_inline_decode(xdr, 4);
3860                 if (unlikely(!p))
3861                         return -EIO;
3862                 *maxname = be32_to_cpup(p);
3863                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3864         }
3865         dprintk("%s: maxname=%u\n", __func__, *maxname);
3866         return status;
3867 }
3868
3869 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3870 {
3871         __be32 *p;
3872         int status = 0;
3873
3874         *res = 1024;
3875         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3876                 return -EIO;
3877         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3878                 uint64_t maxread;
3879                 p = xdr_inline_decode(xdr, 8);
3880                 if (unlikely(!p))
3881                         return -EIO;
3882                 xdr_decode_hyper(p, &maxread);
3883                 if (maxread > 0x7FFFFFFF)
3884                         maxread = 0x7FFFFFFF;
3885                 *res = (uint32_t)maxread;
3886                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3887         }
3888         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3889         return status;
3890 }
3891
3892 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3893 {
3894         __be32 *p;
3895         int status = 0;
3896
3897         *res = 1024;
3898         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3899                 return -EIO;
3900         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3901                 uint64_t maxwrite;
3902                 p = xdr_inline_decode(xdr, 8);
3903                 if (unlikely(!p))
3904                         return -EIO;
3905                 xdr_decode_hyper(p, &maxwrite);
3906                 if (maxwrite > 0x7FFFFFFF)
3907                         maxwrite = 0x7FFFFFFF;
3908                 *res = (uint32_t)maxwrite;
3909                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3910         }
3911         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3912         return status;
3913 }
3914
3915 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3916 {
3917         uint32_t tmp;
3918         __be32 *p;
3919         int ret = 0;
3920
3921         *mode = 0;
3922         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3923                 return -EIO;
3924         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3925                 p = xdr_inline_decode(xdr, 4);
3926                 if (unlikely(!p))
3927                         return -EIO;
3928                 tmp = be32_to_cpup(p);
3929                 *mode = tmp & ~S_IFMT;
3930                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3931                 ret = NFS_ATTR_FATTR_MODE;
3932         }
3933         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3934         return ret;
3935 }
3936
3937 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3938 {
3939         __be32 *p;
3940         int ret = 0;
3941
3942         *nlink = 1;
3943         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3944                 return -EIO;
3945         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3946                 p = xdr_inline_decode(xdr, 4);
3947                 if (unlikely(!p))
3948                         return -EIO;
3949                 *nlink = be32_to_cpup(p);
3950                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3951                 ret = NFS_ATTR_FATTR_NLINK;
3952         }
3953         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3954         return ret;
3955 }
3956
3957 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3958                 struct nfs4_string *name, gfp_t gfp_flags)
3959 {
3960         ssize_t ret;
3961
3962         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3963                         XDR_MAX_NETOBJ, gfp_flags);
3964         name->len = 0;
3965         if (ret > 0)
3966                 name->len = ret;
3967         return ret;
3968 }
3969
3970 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3971                 const struct nfs_server *server, kuid_t *uid,
3972                 struct nfs4_string *owner_name)
3973 {
3974         ssize_t len;
3975         char *p;
3976
3977         *uid = make_kuid(&init_user_ns, -2);
3978         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3979                 return -EIO;
3980         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3981                 return 0;
3982         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3983
3984         if (owner_name != NULL) {
3985                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3986                 if (len <= 0)
3987                         goto out;
3988                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3989                 return NFS_ATTR_FATTR_OWNER_NAME;
3990         } else {
3991                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3992                                 XDR_MAX_NETOBJ);
3993                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3994                         goto out;
3995                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3996                 return NFS_ATTR_FATTR_OWNER;
3997         }
3998 out:
3999         if (len == -EBADMSG)
4000                 return -EIO;
4001         return 0;
4002 }
4003
4004 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4005                 const struct nfs_server *server, kgid_t *gid,
4006                 struct nfs4_string *group_name)
4007 {
4008         ssize_t len;
4009         char *p;
4010
4011         *gid = make_kgid(&init_user_ns, -2);
4012         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4013                 return -EIO;
4014         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4015                 return 0;
4016         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4017
4018         if (group_name != NULL) {
4019                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4020                 if (len <= 0)
4021                         goto out;
4022                 dprintk("%s: name=%s\n", __func__, group_name->data);
4023                 return NFS_ATTR_FATTR_GROUP_NAME;
4024         } else {
4025                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4026                                 XDR_MAX_NETOBJ);
4027                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4028                         goto out;
4029                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4030                 return NFS_ATTR_FATTR_GROUP;
4031         }
4032 out:
4033         if (len == -EBADMSG)
4034                 return -EIO;
4035         return 0;
4036 }
4037
4038 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4039 {
4040         uint32_t major = 0, minor = 0;
4041         __be32 *p;
4042         int ret = 0;
4043
4044         *rdev = MKDEV(0,0);
4045         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4046                 return -EIO;
4047         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4048                 dev_t tmp;
4049
4050                 p = xdr_inline_decode(xdr, 8);
4051                 if (unlikely(!p))
4052                         return -EIO;
4053                 major = be32_to_cpup(p++);
4054                 minor = be32_to_cpup(p);
4055                 tmp = MKDEV(major, minor);
4056                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4057                         *rdev = tmp;
4058                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4059                 ret = NFS_ATTR_FATTR_RDEV;
4060         }
4061         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4062         return ret;
4063 }
4064
4065 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4066 {
4067         __be32 *p;
4068         int status = 0;
4069
4070         *res = 0;
4071         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4072                 return -EIO;
4073         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4074                 p = xdr_inline_decode(xdr, 8);
4075                 if (unlikely(!p))
4076                         return -EIO;
4077                 xdr_decode_hyper(p, res);
4078                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4079         }
4080         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4081         return status;
4082 }
4083
4084 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4085 {
4086         __be32 *p;
4087         int status = 0;
4088
4089         *res = 0;
4090         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4091                 return -EIO;
4092         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4093                 p = xdr_inline_decode(xdr, 8);
4094                 if (unlikely(!p))
4095                         return -EIO;
4096                 xdr_decode_hyper(p, res);
4097                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4098         }
4099         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4100         return status;
4101 }
4102
4103 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4104 {
4105         __be32 *p;
4106         int status = 0;
4107
4108         *res = 0;
4109         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4110                 return -EIO;
4111         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4112                 p = xdr_inline_decode(xdr, 8);
4113                 if (unlikely(!p))
4114                         return -EIO;
4115                 xdr_decode_hyper(p, res);
4116                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4117         }
4118         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4119         return status;
4120 }
4121
4122 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4123 {
4124         __be32 *p;
4125         int ret = 0;
4126
4127         *used = 0;
4128         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4129                 return -EIO;
4130         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4131                 p = xdr_inline_decode(xdr, 8);
4132                 if (unlikely(!p))
4133                         return -EIO;
4134                 xdr_decode_hyper(p, used);
4135                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4136                 ret = NFS_ATTR_FATTR_SPACE_USED;
4137         }
4138         dprintk("%s: space used=%Lu\n", __func__,
4139                         (unsigned long long)*used);
4140         return ret;
4141 }
4142
4143 static __be32 *
4144 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4145 {
4146         __u64 sec;
4147
4148         p = xdr_decode_hyper(p, &sec);
4149         t-> tv_sec = sec;
4150         t->tv_nsec = be32_to_cpup(p++);
4151         return p;
4152 }
4153
4154 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4155 {
4156         __be32 *p;
4157
4158         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4159         if (unlikely(!p))
4160                 return -EIO;
4161         xdr_decode_nfstime4(p, time);
4162         return 0;
4163 }
4164
4165 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4166 {
4167         int status = 0;
4168
4169         time->tv_sec = 0;
4170         time->tv_nsec = 0;
4171         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4172                 return -EIO;
4173         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4174                 status = decode_attr_time(xdr, time);
4175                 if (status == 0)
4176                         status = NFS_ATTR_FATTR_ATIME;
4177                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4178         }
4179         dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4180         return status;
4181 }
4182
4183 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4184 {
4185         int status = 0;
4186
4187         time->tv_sec = 0;
4188         time->tv_nsec = 0;
4189         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4190                 return -EIO;
4191         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4192                 status = decode_attr_time(xdr, time);
4193                 if (status == 0)
4194                         status = NFS_ATTR_FATTR_CTIME;
4195                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4196         }
4197         dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4198         return status;
4199 }
4200
4201 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4202                                   struct timespec64 *time)
4203 {
4204         int status = 0;
4205
4206         time->tv_sec = 0;
4207         time->tv_nsec = 0;
4208         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4209                 return -EIO;
4210         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4211                 status = decode_attr_time(xdr, time);
4212                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4213         }
4214         dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4215                 time->tv_nsec);
4216         return status;
4217 }
4218
4219 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4220                                         struct nfs4_label *label)
4221 {
4222         uint32_t pi = 0;
4223         uint32_t lfs = 0;
4224         __u32 len;
4225         __be32 *p;
4226         int status = 0;
4227
4228         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4229                 return -EIO;
4230         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4231                 p = xdr_inline_decode(xdr, 4);
4232                 if (unlikely(!p))
4233                         return -EIO;
4234                 lfs = be32_to_cpup(p++);
4235                 p = xdr_inline_decode(xdr, 4);
4236                 if (unlikely(!p))
4237                         return -EIO;
4238                 pi = be32_to_cpup(p++);
4239                 p = xdr_inline_decode(xdr, 4);
4240                 if (unlikely(!p))
4241                         return -EIO;
4242                 len = be32_to_cpup(p++);
4243                 p = xdr_inline_decode(xdr, len);
4244                 if (unlikely(!p))
4245                         return -EIO;
4246                 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4247                 if (len < NFS4_MAXLABELLEN) {
4248                         if (label && label->len) {
4249                                 if (label->len < len)
4250                                         return -ERANGE;
4251                                 memcpy(label->label, p, len);
4252                                 label->len = len;
4253                                 label->pi = pi;
4254                                 label->lfs = lfs;
4255                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4256                         }
4257                 } else
4258                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4259                                         __func__, len);
4260                 if (label && label->label)
4261                         dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n",
4262                                 __func__, label->len, (char *)label->label,
4263                                 label->len, label->pi, label->lfs);
4264         }
4265         return status;
4266 }
4267
4268 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4269 {
4270         int status = 0;
4271
4272         time->tv_sec = 0;
4273         time->tv_nsec = 0;
4274         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4275                 return -EIO;
4276         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4277                 status = decode_attr_time(xdr, time);
4278                 if (status == 0)
4279                         status = NFS_ATTR_FATTR_MTIME;
4280                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4281         }
4282         dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4283         return status;
4284 }
4285
4286 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4287                                     uint32_t *res)
4288 {
4289         __be32 *p;
4290
4291         *res = 0;
4292         if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4293                 return -EIO;
4294         if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4295                 p = xdr_inline_decode(xdr, 4);
4296                 if (unlikely(!p))
4297                         return -EIO;
4298                 *res = be32_to_cpup(p);
4299                 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4300         }
4301         dprintk("%s: XATTR support=%s\n", __func__,
4302                 *res == 0 ? "false" : "true");
4303         return 0;
4304 }
4305
4306 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4307 {
4308         unsigned int attrwords = XDR_QUADLEN(attrlen);
4309         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4310
4311         if (unlikely(attrwords != nwords)) {
4312                 dprintk("%s: server returned incorrect attribute length: "
4313                         "%u %c %u\n",
4314                                 __func__,
4315                                 attrwords << 2,
4316                                 (attrwords < nwords) ? '<' : '>',
4317                                 nwords << 2);
4318                 return -EIO;
4319         }
4320         return 0;
4321 }
4322
4323 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4324 {
4325         __be32 *p;
4326
4327         p = xdr_inline_decode(xdr, 20);
4328         if (unlikely(!p))
4329                 return -EIO;
4330         cinfo->atomic = be32_to_cpup(p++);
4331         p = xdr_decode_hyper(p, &cinfo->before);
4332         xdr_decode_hyper(p, &cinfo->after);
4333         return 0;
4334 }
4335
4336 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4337 {
4338         __be32 *p;
4339         uint32_t supp, acc;
4340         int status;
4341
4342         status = decode_op_hdr(xdr, OP_ACCESS);
4343         if (status)
4344                 return status;
4345         p = xdr_inline_decode(xdr, 8);
4346         if (unlikely(!p))
4347                 return -EIO;
4348         supp = be32_to_cpup(p++);
4349         acc = be32_to_cpup(p);
4350         *supported = supp;
4351         *access = acc;
4352         return 0;
4353 }
4354
4355 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4356 {
4357         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4358         if (unlikely(ret < 0))
4359                 return -EIO;
4360         return 0;
4361 }
4362
4363 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4364 {
4365         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4366 }
4367
4368 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4369 {
4370         stateid->type = NFS4_OPEN_STATEID_TYPE;
4371         return decode_stateid(xdr, stateid);
4372 }
4373
4374 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4375 {
4376         stateid->type = NFS4_LOCK_STATEID_TYPE;
4377         return decode_stateid(xdr, stateid);
4378 }
4379
4380 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4381 {
4382         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4383         return decode_stateid(xdr, stateid);
4384 }
4385
4386 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4387 {
4388         nfs4_stateid dummy;
4389
4390         nfs4_stateid_copy(stateid, &invalid_stateid);
4391         return decode_stateid(xdr, &dummy);
4392 }
4393
4394 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4395 {
4396         int status;
4397
4398         status = decode_op_hdr(xdr, OP_CLOSE);
4399         if (status != -EIO)
4400                 nfs_increment_open_seqid(status, res->seqid);
4401         if (!status)
4402                 status = decode_invalid_stateid(xdr, &res->stateid);
4403         return status;
4404 }
4405
4406 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4407 {
4408         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4409 }
4410
4411 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4412 {
4413         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4414 }
4415
4416 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4417 {
4418         struct nfs_writeverf *verf = res->verf;
4419         int status;
4420
4421         status = decode_op_hdr(xdr, OP_COMMIT);
4422         if (!status)
4423                 status = decode_write_verifier(xdr, &verf->verifier);
4424         if (!status)
4425                 verf->committed = NFS_FILE_SYNC;
4426         return status;
4427 }
4428
4429 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4430 {
4431         __be32 *p;
4432         uint32_t bmlen;
4433         int status;
4434
4435         status = decode_op_hdr(xdr, OP_CREATE);
4436         if (status)
4437                 return status;
4438         if ((status = decode_change_info(xdr, cinfo)))
4439                 return status;
4440         p = xdr_inline_decode(xdr, 4);
4441         if (unlikely(!p))
4442                 return -EIO;
4443         bmlen = be32_to_cpup(p);
4444         p = xdr_inline_decode(xdr, bmlen << 2);
4445         if (likely(p))
4446                 return 0;
4447         return -EIO;
4448 }
4449
4450 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4451 {
4452         unsigned int savep;
4453         uint32_t attrlen, bitmap[3] = {0};
4454         int status;
4455
4456         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4457                 goto xdr_error;
4458         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4459                 goto xdr_error;
4460         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4461                 goto xdr_error;
4462         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4463                 goto xdr_error;
4464         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4465                                                  &res->fh_expire_type)) != 0)
4466                 goto xdr_error;
4467         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4468                 goto xdr_error;
4469         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4470                 goto xdr_error;
4471         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4472                 goto xdr_error;
4473         if ((status = decode_attr_case_insensitive(xdr, bitmap, &res->case_insensitive)) != 0)
4474                 goto xdr_error;
4475         if ((status = decode_attr_case_preserving(xdr, bitmap, &res->case_preserving)) != 0)
4476                 goto xdr_error;
4477         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4478                                 res->exclcreat_bitmask)) != 0)
4479                 goto xdr_error;
4480         status = verify_attr_len(xdr, savep, attrlen);
4481 xdr_error:
4482         dprintk("%s: xdr returned %d!\n", __func__, -status);
4483         return status;
4484 }
4485
4486 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4487 {
4488         unsigned int savep;
4489         uint32_t attrlen, bitmap[3] = {0};
4490         int status;
4491
4492         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4493                 goto xdr_error;
4494         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4495                 goto xdr_error;
4496         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4497                 goto xdr_error;
4498
4499         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4500                 goto xdr_error;
4501         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4502                 goto xdr_error;
4503         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4504                 goto xdr_error;
4505
4506         status = -EIO;
4507         if (unlikely(bitmap[0]))
4508                 goto xdr_error;
4509
4510         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4511                 goto xdr_error;
4512         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4513                 goto xdr_error;
4514         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4515                 goto xdr_error;
4516
4517         status = verify_attr_len(xdr, savep, attrlen);
4518 xdr_error:
4519         dprintk("%s: xdr returned %d!\n", __func__, -status);
4520         return status;
4521 }
4522
4523 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4524 {
4525         unsigned int savep;
4526         uint32_t attrlen, bitmap[3] = {0};
4527         int status;
4528
4529         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4530                 goto xdr_error;
4531         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4532                 goto xdr_error;
4533         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4534                 goto xdr_error;
4535
4536         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4537                 goto xdr_error;
4538         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4539                 goto xdr_error;
4540
4541         status = verify_attr_len(xdr, savep, attrlen);
4542 xdr_error:
4543         dprintk("%s: xdr returned %d!\n", __func__, -status);
4544         return status;
4545 }
4546
4547 static int decode_threshold_hint(struct xdr_stream *xdr,
4548                                   uint32_t *bitmap,
4549                                   uint64_t *res,
4550                                   uint32_t hint_bit)
4551 {
4552         __be32 *p;
4553
4554         *res = 0;
4555         if (likely(bitmap[0] & hint_bit)) {
4556                 p = xdr_inline_decode(xdr, 8);
4557                 if (unlikely(!p))
4558                         return -EIO;
4559                 xdr_decode_hyper(p, res);
4560         }
4561         return 0;
4562 }
4563
4564 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4565                                         struct nfs4_threshold *res)
4566 {
4567         __be32 *p;
4568         unsigned int savep;
4569         uint32_t bitmap[3] = {0,}, attrlen;
4570         int status;
4571
4572         /* layout type */
4573         p = xdr_inline_decode(xdr, 4);
4574         if (unlikely(!p))
4575                 return -EIO;
4576         res->l_type = be32_to_cpup(p);
4577
4578         /* thi_hintset bitmap */
4579         status = decode_attr_bitmap(xdr, bitmap);
4580         if (status < 0)
4581                 goto xdr_error;
4582
4583         /* thi_hintlist length */
4584         status = decode_attr_length(xdr, &attrlen, &savep);
4585         if (status < 0)
4586                 goto xdr_error;
4587         /* thi_hintlist */
4588         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4589         if (status < 0)
4590                 goto xdr_error;
4591         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4592         if (status < 0)
4593                 goto xdr_error;
4594         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4595                                        THRESHOLD_RD_IO);
4596         if (status < 0)
4597                 goto xdr_error;
4598         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4599                                        THRESHOLD_WR_IO);
4600         if (status < 0)
4601                 goto xdr_error;
4602
4603         status = verify_attr_len(xdr, savep, attrlen);
4604         res->bm = bitmap[0];
4605
4606         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4607                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4608                 res->wr_io_sz);
4609 xdr_error:
4610         dprintk("%s ret=%d!\n", __func__, status);
4611         return status;
4612 }
4613
4614 /*
4615  * Thresholds on pNFS direct I/O vrs MDS I/O
4616  */
4617 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4618                                     uint32_t *bitmap,
4619                                     struct nfs4_threshold *res)
4620 {
4621         __be32 *p;
4622         int status = 0;
4623         uint32_t num;
4624
4625         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4626                 return -EIO;
4627         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4628                 /* Did the server return an unrequested attribute? */
4629                 if (unlikely(res == NULL))
4630                         return -EREMOTEIO;
4631                 p = xdr_inline_decode(xdr, 4);
4632                 if (unlikely(!p))
4633                         return -EIO;
4634                 num = be32_to_cpup(p);
4635                 if (num == 0)
4636                         return 0;
4637                 if (num > 1)
4638                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4639                                 "drivers per filesystem not supported\n",
4640                                 __func__);
4641
4642                 status = decode_first_threshold_item4(xdr, res);
4643                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4644         }
4645         return status;
4646 }
4647
4648 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4649                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4650                 struct nfs4_fs_locations *fs_loc, const struct nfs_server *server)
4651 {
4652         int status;
4653         umode_t fmode = 0;
4654         uint32_t type;
4655         int32_t err;
4656
4657         status = decode_attr_type(xdr, bitmap, &type);
4658         if (status < 0)
4659                 goto xdr_error;
4660         fattr->mode = 0;
4661         if (status != 0) {
4662                 fattr->mode |= nfs_type2fmt[type];
4663                 fattr->valid |= status;
4664         }
4665
4666         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4667         if (status < 0)
4668                 goto xdr_error;
4669         fattr->valid |= status;
4670
4671         status = decode_attr_size(xdr, bitmap, &fattr->size);
4672         if (status < 0)
4673                 goto xdr_error;
4674         fattr->valid |= status;
4675
4676         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4677         if (status < 0)
4678                 goto xdr_error;
4679         fattr->valid |= status;
4680
4681         err = 0;
4682         status = decode_attr_error(xdr, bitmap, &err);
4683         if (status < 0)
4684                 goto xdr_error;
4685
4686         status = decode_attr_filehandle(xdr, bitmap, fh);
4687         if (status < 0)
4688                 goto xdr_error;
4689
4690         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4691         if (status < 0)
4692                 goto xdr_error;
4693         fattr->valid |= status;
4694
4695         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4696         if (status < 0)
4697                 goto xdr_error;
4698         fattr->valid |= status;
4699
4700         status = -EIO;
4701         if (unlikely(bitmap[0]))
4702                 goto xdr_error;
4703
4704         status = decode_attr_mode(xdr, bitmap, &fmode);
4705         if (status < 0)
4706                 goto xdr_error;
4707         if (status != 0) {
4708                 fattr->mode |= fmode;
4709                 fattr->valid |= status;
4710         }
4711
4712         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4713         if (status < 0)
4714                 goto xdr_error;
4715         fattr->valid |= status;
4716
4717         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4718         if (status < 0)
4719                 goto xdr_error;
4720         fattr->valid |= status;
4721
4722         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4723         if (status < 0)
4724                 goto xdr_error;
4725         fattr->valid |= status;
4726
4727         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4728         if (status < 0)
4729                 goto xdr_error;
4730         fattr->valid |= status;
4731
4732         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4733         if (status < 0)
4734                 goto xdr_error;
4735         fattr->valid |= status;
4736
4737         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4738         if (status < 0)
4739                 goto xdr_error;
4740         fattr->valid |= status;
4741
4742         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4743         if (status < 0)
4744                 goto xdr_error;
4745         fattr->valid |= status;
4746
4747         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4748         if (status < 0)
4749                 goto xdr_error;
4750         fattr->valid |= status;
4751
4752         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4753         if (status < 0)
4754                 goto xdr_error;
4755         fattr->valid |= status;
4756
4757         status = -EIO;
4758         if (unlikely(bitmap[1]))
4759                 goto xdr_error;
4760
4761         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4762         if (status < 0)
4763                 goto xdr_error;
4764
4765         status = decode_attr_security_label(xdr, bitmap, fattr->label);
4766         if (status < 0)
4767                 goto xdr_error;
4768         fattr->valid |= status;
4769
4770 xdr_error:
4771         dprintk("%s: xdr returned %d\n", __func__, -status);
4772         return status;
4773 }
4774
4775 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4776                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4777                 const struct nfs_server *server)
4778 {
4779         unsigned int savep;
4780         uint32_t attrlen,
4781                  bitmap[3] = {0};
4782         int status;
4783
4784         status = decode_op_hdr(xdr, OP_GETATTR);
4785         if (status < 0)
4786                 goto xdr_error;
4787
4788         status = decode_attr_bitmap(xdr, bitmap);
4789         if (status < 0)
4790                 goto xdr_error;
4791
4792         status = decode_attr_length(xdr, &attrlen, &savep);
4793         if (status < 0)
4794                 goto xdr_error;
4795
4796         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4797         if (status < 0)
4798                 goto xdr_error;
4799
4800         status = verify_attr_len(xdr, savep, attrlen);
4801 xdr_error:
4802         dprintk("%s: xdr returned %d\n", __func__, -status);
4803         return status;
4804 }
4805
4806 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4807                 const struct nfs_server *server)
4808 {
4809         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4810 }
4811
4812 /*
4813  * Decode potentially multiple layout types.
4814  */
4815 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4816                                     struct nfs_fsinfo *fsinfo)
4817 {
4818         __be32 *p;
4819         uint32_t i;
4820
4821         p = xdr_inline_decode(xdr, 4);
4822         if (unlikely(!p))
4823                 return -EIO;
4824         fsinfo->nlayouttypes = be32_to_cpup(p);
4825
4826         /* pNFS is not supported by the underlying file system */
4827         if (fsinfo->nlayouttypes == 0)
4828                 return 0;
4829
4830         /* Decode and set first layout type, move xdr->p past unused types */
4831         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4832         if (unlikely(!p))
4833                 return -EIO;
4834
4835         /* If we get too many, then just cap it at the max */
4836         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4837                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4838                         __func__, fsinfo->nlayouttypes);
4839                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4840         }
4841
4842         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4843                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4844         return 0;
4845 }
4846
4847 /*
4848  * The type of file system exported.
4849  * Note we must ensure that layouttype is set in any non-error case.
4850  */
4851 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4852                                 struct nfs_fsinfo *fsinfo)
4853 {
4854         int status = 0;
4855
4856         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4857         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4858                 return -EIO;
4859         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4860                 status = decode_pnfs_layout_types(xdr, fsinfo);
4861                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4862         }
4863         return status;
4864 }
4865
4866 /*
4867  * The prefered block size for layout directed io
4868  */
4869 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4870                                       uint32_t *res)
4871 {
4872         __be32 *p;
4873
4874         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4875         *res = 0;
4876         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4877                 p = xdr_inline_decode(xdr, 4);
4878                 if (unlikely(!p))
4879                         return -EIO;
4880                 *res = be32_to_cpup(p);
4881                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4882         }
4883         return 0;
4884 }
4885
4886 /*
4887  * The granularity of a CLONE operation.
4888  */
4889 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4890                                      uint32_t *res)
4891 {
4892         __be32 *p;
4893
4894         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4895         *res = 0;
4896         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4897                 p = xdr_inline_decode(xdr, 4);
4898                 if (unlikely(!p))
4899                         return -EIO;
4900                 *res = be32_to_cpup(p);
4901                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4902         }
4903         return 0;
4904 }
4905
4906 static int decode_attr_change_attr_type(struct xdr_stream *xdr,
4907                                         uint32_t *bitmap,
4908                                         enum nfs4_change_attr_type *res)
4909 {
4910         u32 tmp = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4911
4912         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4913         if (bitmap[2] & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
4914                 if (xdr_stream_decode_u32(xdr, &tmp))
4915                         return -EIO;
4916                 bitmap[2] &= ~FATTR4_WORD2_CHANGE_ATTR_TYPE;
4917         }
4918
4919         switch(tmp) {
4920         case NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR:
4921         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER:
4922         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS:
4923         case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
4924                 *res = tmp;
4925                 break;
4926         default:
4927                 *res = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4928         }
4929         return 0;
4930 }
4931
4932 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4933 {
4934         unsigned int savep;
4935         uint32_t attrlen, bitmap[3];
4936         int status;
4937
4938         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4939                 goto xdr_error;
4940         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4941                 goto xdr_error;
4942         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4943                 goto xdr_error;
4944
4945         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4946
4947         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4948                 goto xdr_error;
4949         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4950                 goto xdr_error;
4951         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4952                 goto xdr_error;
4953         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4954         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4955                 goto xdr_error;
4956         fsinfo->wtpref = fsinfo->wtmax;
4957
4958         status = -EIO;
4959         if (unlikely(bitmap[0]))
4960                 goto xdr_error;
4961
4962         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4963         if (status != 0)
4964                 goto xdr_error;
4965         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4966         if (status != 0)
4967                 goto xdr_error;
4968
4969         status = -EIO;
4970         if (unlikely(bitmap[1]))
4971                 goto xdr_error;
4972
4973         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4974         if (status)
4975                 goto xdr_error;
4976         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4977         if (status)
4978                 goto xdr_error;
4979
4980         status = decode_attr_change_attr_type(xdr, bitmap,
4981                                               &fsinfo->change_attr_type);
4982         if (status)
4983                 goto xdr_error;
4984
4985         status = decode_attr_xattrsupport(xdr, bitmap,
4986                                           &fsinfo->xattr_support);
4987         if (status)
4988                 goto xdr_error;
4989
4990         status = verify_attr_len(xdr, savep, attrlen);
4991 xdr_error:
4992         dprintk("%s: xdr returned %d!\n", __func__, -status);
4993         return status;
4994 }
4995
4996 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4997 {
4998         __be32 *p;
4999         uint32_t len;
5000         int status;
5001
5002         /* Zero handle first to allow comparisons */
5003         memset(fh, 0, sizeof(*fh));
5004
5005         status = decode_op_hdr(xdr, OP_GETFH);
5006         if (status)
5007                 return status;
5008
5009         p = xdr_inline_decode(xdr, 4);
5010         if (unlikely(!p))
5011                 return -EIO;
5012         len = be32_to_cpup(p);
5013         if (len > NFS4_FHSIZE || len == 0) {
5014                 trace_nfs4_xdr_bad_filehandle(xdr, OP_GETFH, NFS4ERR_BADHANDLE);
5015                 return -EREMOTEIO;
5016         }
5017         fh->size = len;
5018         p = xdr_inline_decode(xdr, len);
5019         if (unlikely(!p))
5020                 return -EIO;
5021         memcpy(fh->data, p, len);
5022         return 0;
5023 }
5024
5025 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5026 {
5027         int status;
5028
5029         status = decode_op_hdr(xdr, OP_LINK);
5030         if (status)
5031                 return status;
5032         return decode_change_info(xdr, cinfo);
5033 }
5034
5035 /*
5036  * We create the owner, so we know a proper owner.id length is 4.
5037  */
5038 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5039 {
5040         uint64_t offset, length, clientid;
5041         __be32 *p;
5042         uint32_t namelen, type;
5043
5044         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5045         if (unlikely(!p))
5046                 return -EIO;
5047         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5048         p = xdr_decode_hyper(p, &length);
5049         type = be32_to_cpup(p++); /* 4 byte read */
5050         if (fl != NULL) { /* manipulate file lock */
5051                 fl->fl_start = (loff_t)offset;
5052                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5053                 if (length == ~(uint64_t)0)
5054                         fl->fl_end = OFFSET_MAX;
5055                 fl->fl_type = F_WRLCK;
5056                 if (type & 1)
5057                         fl->fl_type = F_RDLCK;
5058                 fl->fl_pid = 0;
5059         }
5060         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5061         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5062         p = xdr_inline_decode(xdr, namelen); /* variable size field */
5063         if (likely(!p))
5064                 return -EIO;
5065         return -NFS4ERR_DENIED;
5066 }
5067
5068 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5069 {
5070         int status;
5071
5072         status = decode_op_hdr(xdr, OP_LOCK);
5073         if (status == -EIO)
5074                 goto out;
5075         if (status == 0) {
5076                 status = decode_lock_stateid(xdr, &res->stateid);
5077                 if (unlikely(status))
5078                         goto out;
5079         } else if (status == -NFS4ERR_DENIED)
5080                 status = decode_lock_denied(xdr, NULL);
5081         if (res->open_seqid != NULL)
5082                 nfs_increment_open_seqid(status, res->open_seqid);
5083         nfs_increment_lock_seqid(status, res->lock_seqid);
5084 out:
5085         return status;
5086 }
5087
5088 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5089 {
5090         int status;
5091         status = decode_op_hdr(xdr, OP_LOCKT);
5092         if (status == -NFS4ERR_DENIED)
5093                 return decode_lock_denied(xdr, res->denied);
5094         return status;
5095 }
5096
5097 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5098 {
5099         int status;
5100
5101         status = decode_op_hdr(xdr, OP_LOCKU);
5102         if (status != -EIO)
5103                 nfs_increment_lock_seqid(status, res->seqid);
5104         if (status == 0)
5105                 status = decode_lock_stateid(xdr, &res->stateid);
5106         return status;
5107 }
5108
5109 static int decode_release_lockowner(struct xdr_stream *xdr)
5110 {
5111         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5112 }
5113
5114 static int decode_lookup(struct xdr_stream *xdr)
5115 {
5116         return decode_op_hdr(xdr, OP_LOOKUP);
5117 }
5118
5119 static int decode_lookupp(struct xdr_stream *xdr)
5120 {
5121         return decode_op_hdr(xdr, OP_LOOKUPP);
5122 }
5123
5124 /* This is too sick! */
5125 static int decode_space_limit(struct xdr_stream *xdr,
5126                 unsigned long *pagemod_limit)
5127 {
5128         __be32 *p;
5129         uint32_t limit_type, nblocks, blocksize;
5130         u64 maxsize = 0;
5131
5132         p = xdr_inline_decode(xdr, 12);
5133         if (unlikely(!p))
5134                 return -EIO;
5135         limit_type = be32_to_cpup(p++);
5136         switch (limit_type) {
5137         case NFS4_LIMIT_SIZE:
5138                 xdr_decode_hyper(p, &maxsize);
5139                 break;
5140         case NFS4_LIMIT_BLOCKS:
5141                 nblocks = be32_to_cpup(p++);
5142                 blocksize = be32_to_cpup(p);
5143                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5144         }
5145         maxsize >>= PAGE_SHIFT;
5146         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5147         return 0;
5148 }
5149
5150 static int decode_rw_delegation(struct xdr_stream *xdr,
5151                 uint32_t delegation_type,
5152                 struct nfs_openres *res)
5153 {
5154         __be32 *p;
5155         int status;
5156
5157         status = decode_delegation_stateid(xdr, &res->delegation);
5158         if (unlikely(status))
5159                 return status;
5160         p = xdr_inline_decode(xdr, 4);
5161         if (unlikely(!p))
5162                 return -EIO;
5163         res->do_recall = be32_to_cpup(p);
5164
5165         switch (delegation_type) {
5166         case NFS4_OPEN_DELEGATE_READ:
5167                 res->delegation_type = FMODE_READ;
5168                 break;
5169         case NFS4_OPEN_DELEGATE_WRITE:
5170                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5171                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5172                                 return -EIO;
5173         }
5174         return decode_ace(xdr, NULL);
5175 }
5176
5177 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5178 {
5179         __be32 *p;
5180         uint32_t why_no_delegation;
5181
5182         p = xdr_inline_decode(xdr, 4);
5183         if (unlikely(!p))
5184                 return -EIO;
5185         why_no_delegation = be32_to_cpup(p);
5186         switch (why_no_delegation) {
5187                 case WND4_CONTENTION:
5188                 case WND4_RESOURCE:
5189                         xdr_inline_decode(xdr, 4);
5190                         /* Ignore for now */
5191         }
5192         return 0;
5193 }
5194
5195 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5196 {
5197         __be32 *p;
5198         uint32_t delegation_type;
5199
5200         p = xdr_inline_decode(xdr, 4);
5201         if (unlikely(!p))
5202                 return -EIO;
5203         delegation_type = be32_to_cpup(p);
5204         res->delegation_type = 0;
5205         switch (delegation_type) {
5206         case NFS4_OPEN_DELEGATE_NONE:
5207                 return 0;
5208         case NFS4_OPEN_DELEGATE_READ:
5209         case NFS4_OPEN_DELEGATE_WRITE:
5210                 return decode_rw_delegation(xdr, delegation_type, res);
5211         case NFS4_OPEN_DELEGATE_NONE_EXT:
5212                 return decode_no_delegation(xdr, res);
5213         }
5214         return -EIO;
5215 }
5216
5217 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5218 {
5219         __be32 *p;
5220         uint32_t savewords, bmlen, i;
5221         int status;
5222
5223         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5224                 return status;
5225         nfs_increment_open_seqid(status, res->seqid);
5226         if (status)
5227                 return status;
5228         status = decode_open_stateid(xdr, &res->stateid);
5229         if (unlikely(status))
5230                 return status;
5231
5232         decode_change_info(xdr, &res->cinfo);
5233
5234         p = xdr_inline_decode(xdr, 8);
5235         if (unlikely(!p))
5236                 return -EIO;
5237         res->rflags = be32_to_cpup(p++);
5238         bmlen = be32_to_cpup(p);
5239         if (bmlen > 10)
5240                 goto xdr_error;
5241
5242         p = xdr_inline_decode(xdr, bmlen << 2);
5243         if (unlikely(!p))
5244                 return -EIO;
5245         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5246         for (i = 0; i < savewords; ++i)
5247                 res->attrset[i] = be32_to_cpup(p++);
5248         for (; i < NFS4_BITMAP_SIZE; i++)
5249                 res->attrset[i] = 0;
5250
5251         return decode_delegation(xdr, res);
5252 xdr_error:
5253         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5254         return -EIO;
5255 }
5256
5257 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5258 {
5259         int status;
5260
5261         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5262         if (status != -EIO)
5263                 nfs_increment_open_seqid(status, res->seqid);
5264         if (!status)
5265                 status = decode_open_stateid(xdr, &res->stateid);
5266         return status;
5267 }
5268
5269 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5270 {
5271         int status;
5272
5273         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5274         if (status != -EIO)
5275                 nfs_increment_open_seqid(status, res->seqid);
5276         if (!status)
5277                 status = decode_open_stateid(xdr, &res->stateid);
5278         return status;
5279 }
5280
5281 static int decode_putfh(struct xdr_stream *xdr)
5282 {
5283         return decode_op_hdr(xdr, OP_PUTFH);
5284 }
5285
5286 static int decode_putrootfh(struct xdr_stream *xdr)
5287 {
5288         return decode_op_hdr(xdr, OP_PUTROOTFH);
5289 }
5290
5291 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5292                        struct nfs_pgio_res *res)
5293 {
5294         __be32 *p;
5295         uint32_t count, eof, recvd;
5296         int status;
5297
5298         status = decode_op_hdr(xdr, OP_READ);
5299         if (status)
5300                 return status;
5301         p = xdr_inline_decode(xdr, 8);
5302         if (unlikely(!p))
5303                 return -EIO;
5304         eof = be32_to_cpup(p++);
5305         count = be32_to_cpup(p);
5306         recvd = xdr_read_pages(xdr, count);
5307         if (count > recvd) {
5308                 dprintk("NFS: server cheating in read reply: "
5309                                 "count %u > recvd %u\n", count, recvd);
5310                 count = recvd;
5311                 eof = 0;
5312         }
5313         res->eof = eof;
5314         res->count = count;
5315         return 0;
5316 }
5317
5318 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5319 {
5320         int             status;
5321         __be32          verf[2];
5322
5323         status = decode_op_hdr(xdr, OP_READDIR);
5324         if (!status)
5325                 status = decode_verifier(xdr, readdir->verifier.data);
5326         if (unlikely(status))
5327                 return status;
5328         memcpy(verf, readdir->verifier.data, sizeof(verf));
5329         dprintk("%s: verifier = %08x:%08x\n",
5330                         __func__, verf[0], verf[1]);
5331         return xdr_read_pages(xdr, xdr->buf->page_len);
5332 }
5333
5334 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5335 {
5336         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5337         u32 len, recvd;
5338         __be32 *p;
5339         int status;
5340
5341         status = decode_op_hdr(xdr, OP_READLINK);
5342         if (status)
5343                 return status;
5344
5345         /* Convert length of symlink */
5346         p = xdr_inline_decode(xdr, 4);
5347         if (unlikely(!p))
5348                 return -EIO;
5349         len = be32_to_cpup(p);
5350         if (len >= rcvbuf->page_len || len <= 0) {
5351                 dprintk("nfs: server returned giant symlink!\n");
5352                 return -ENAMETOOLONG;
5353         }
5354         recvd = xdr_read_pages(xdr, len);
5355         if (recvd < len) {
5356                 dprintk("NFS: server cheating in readlink reply: "
5357                                 "count %u > recvd %u\n", len, recvd);
5358                 return -EIO;
5359         }
5360         /*
5361          * The XDR encode routine has set things up so that
5362          * the link text will be copied directly into the
5363          * buffer.  We just have to do overflow-checking,
5364          * and null-terminate the text (the VFS expects
5365          * null-termination).
5366          */
5367         xdr_terminate_string(rcvbuf, len);
5368         return 0;
5369 }
5370
5371 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5372 {
5373         int status;
5374
5375         status = decode_op_hdr(xdr, OP_REMOVE);
5376         if (status)
5377                 goto out;
5378         status = decode_change_info(xdr, cinfo);
5379 out:
5380         return status;
5381 }
5382
5383 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5384               struct nfs4_change_info *new_cinfo)
5385 {
5386         int status;
5387
5388         status = decode_op_hdr(xdr, OP_RENAME);
5389         if (status)
5390                 goto out;
5391         if ((status = decode_change_info(xdr, old_cinfo)))
5392                 goto out;
5393         status = decode_change_info(xdr, new_cinfo);
5394 out:
5395         return status;
5396 }
5397
5398 static int decode_renew(struct xdr_stream *xdr)
5399 {
5400         return decode_op_hdr(xdr, OP_RENEW);
5401 }
5402
5403 static int
5404 decode_restorefh(struct xdr_stream *xdr)
5405 {
5406         return decode_op_hdr(xdr, OP_RESTOREFH);
5407 }
5408
5409 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5410                          struct nfs_getaclres *res, enum nfs4_acl_type type)
5411 {
5412         unsigned int savep;
5413         uint32_t attrlen,
5414                  bitmap[3] = {0};
5415         int status;
5416
5417         res->acl_len = 0;
5418         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5419                 goto out;
5420
5421         xdr_enter_page(xdr, xdr->buf->page_len);
5422
5423         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5424                 goto out;
5425         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5426                 goto out;
5427
5428         switch (type) {
5429         default:
5430                 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5431                         return -EIO;
5432                 if (!(bitmap[0] & FATTR4_WORD0_ACL))
5433                         return -EOPNOTSUPP;
5434                 break;
5435         case NFS4ACL_DACL:
5436                 if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_DACL - 1U)))
5437                         return -EIO;
5438                 if (!(bitmap[1] & FATTR4_WORD1_DACL))
5439                         return -EOPNOTSUPP;
5440                 break;
5441         case NFS4ACL_SACL:
5442                 if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_SACL - 1U)))
5443                         return -EIO;
5444                 if (!(bitmap[1] & FATTR4_WORD1_SACL))
5445                         return -EOPNOTSUPP;
5446         }
5447
5448         /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5449          * are stored with the acl data to handle the problem of
5450          * variable length bitmaps.*/
5451         res->acl_data_offset = xdr_page_pos(xdr);
5452         res->acl_len = attrlen;
5453
5454         /* Check for receive buffer overflow */
5455         if (res->acl_len > xdr_stream_remaining(xdr) ||
5456             res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5457                 res->acl_flags |= NFS4_ACL_TRUNC;
5458                 dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5459                         attrlen, xdr_stream_remaining(xdr));
5460         }
5461 out:
5462         return status;
5463 }
5464
5465 static int
5466 decode_savefh(struct xdr_stream *xdr)
5467 {
5468         return decode_op_hdr(xdr, OP_SAVEFH);
5469 }
5470
5471 static int decode_setattr(struct xdr_stream *xdr)
5472 {
5473         int status;
5474
5475         status = decode_op_hdr(xdr, OP_SETATTR);
5476         if (status)
5477                 return status;
5478         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5479                 return 0;
5480         return -EIO;
5481 }
5482
5483 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5484 {
5485         __be32 *p;
5486         uint32_t opnum;
5487         int32_t nfserr;
5488
5489         p = xdr_inline_decode(xdr, 8);
5490         if (unlikely(!p))
5491                 return -EIO;
5492         opnum = be32_to_cpup(p++);
5493         if (opnum != OP_SETCLIENTID) {
5494                 dprintk("nfs: decode_setclientid: Server returned operation"
5495                         " %d\n", opnum);
5496                 return -EIO;
5497         }
5498         nfserr = be32_to_cpup(p);
5499         if (nfserr == NFS_OK) {
5500                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5501                 if (unlikely(!p))
5502                         return -EIO;
5503                 p = xdr_decode_hyper(p, &res->clientid);
5504                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5505         } else if (nfserr == NFSERR_CLID_INUSE) {
5506                 uint32_t len;
5507
5508                 /* skip netid string */
5509                 p = xdr_inline_decode(xdr, 4);
5510                 if (unlikely(!p))
5511                         return -EIO;
5512                 len = be32_to_cpup(p);
5513                 p = xdr_inline_decode(xdr, len);
5514                 if (unlikely(!p))
5515                         return -EIO;
5516
5517                 /* skip uaddr string */
5518                 p = xdr_inline_decode(xdr, 4);
5519                 if (unlikely(!p))
5520                         return -EIO;
5521                 len = be32_to_cpup(p);
5522                 p = xdr_inline_decode(xdr, len);
5523                 if (unlikely(!p))
5524                         return -EIO;
5525                 return -NFSERR_CLID_INUSE;
5526         } else
5527                 return nfs4_stat_to_errno(nfserr);
5528
5529         return 0;
5530 }
5531
5532 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5533 {
5534         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5535 }
5536
5537 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5538 {
5539         __be32 *p;
5540         int status;
5541
5542         status = decode_op_hdr(xdr, OP_WRITE);
5543         if (status)
5544                 return status;
5545
5546         p = xdr_inline_decode(xdr, 8);
5547         if (unlikely(!p))
5548                 return -EIO;
5549         res->count = be32_to_cpup(p++);
5550         res->verf->committed = be32_to_cpup(p++);
5551         return decode_write_verifier(xdr, &res->verf->verifier);
5552 }
5553
5554 static int decode_delegreturn(struct xdr_stream *xdr)
5555 {
5556         return decode_op_hdr(xdr, OP_DELEGRETURN);
5557 }
5558
5559 static int decode_secinfo_gss(struct xdr_stream *xdr,
5560                               struct nfs4_secinfo4 *flavor)
5561 {
5562         u32 oid_len;
5563         __be32 *p;
5564
5565         p = xdr_inline_decode(xdr, 4);
5566         if (unlikely(!p))
5567                 return -EIO;
5568         oid_len = be32_to_cpup(p);
5569         if (oid_len > GSS_OID_MAX_LEN)
5570                 return -EINVAL;
5571
5572         p = xdr_inline_decode(xdr, oid_len);
5573         if (unlikely(!p))
5574                 return -EIO;
5575         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5576         flavor->flavor_info.oid.len = oid_len;
5577
5578         p = xdr_inline_decode(xdr, 8);
5579         if (unlikely(!p))
5580                 return -EIO;
5581         flavor->flavor_info.qop = be32_to_cpup(p++);
5582         flavor->flavor_info.service = be32_to_cpup(p);
5583
5584         return 0;
5585 }
5586
5587 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5588 {
5589         struct nfs4_secinfo4 *sec_flavor;
5590         unsigned int i, num_flavors;
5591         int status;
5592         __be32 *p;
5593
5594         p = xdr_inline_decode(xdr, 4);
5595         if (unlikely(!p))
5596                 return -EIO;
5597
5598         res->flavors->num_flavors = 0;
5599         num_flavors = be32_to_cpup(p);
5600
5601         for (i = 0; i < num_flavors; i++) {
5602                 sec_flavor = &res->flavors->flavors[i];
5603                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5604                         break;
5605
5606                 p = xdr_inline_decode(xdr, 4);
5607                 if (unlikely(!p))
5608                         return -EIO;
5609                 sec_flavor->flavor = be32_to_cpup(p);
5610
5611                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5612                         status = decode_secinfo_gss(xdr, sec_flavor);
5613                         if (status)
5614                                 goto out;
5615                 }
5616                 res->flavors->num_flavors++;
5617         }
5618
5619         status = 0;
5620 out:
5621         return status;
5622 }
5623
5624 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5625 {
5626         int status = decode_op_hdr(xdr, OP_SECINFO);
5627         if (status)
5628                 return status;
5629         return decode_secinfo_common(xdr, res);
5630 }
5631
5632 #if defined(CONFIG_NFS_V4_1)
5633 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5634 {
5635         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5636         if (status)
5637                 return status;
5638         return decode_secinfo_common(xdr, res);
5639 }
5640
5641 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5642 {
5643         if (xdr_stream_decode_uint32_array(xdr, op_map->u.words,
5644                                            ARRAY_SIZE(op_map->u.words)) < 0)
5645                 return -EIO;
5646         return 0;
5647 }
5648
5649 static int decode_exchange_id(struct xdr_stream *xdr,
5650                               struct nfs41_exchange_id_res *res)
5651 {
5652         __be32 *p;
5653         uint32_t dummy;
5654         char *dummy_str;
5655         int status;
5656         uint32_t impl_id_count;
5657
5658         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5659         if (status)
5660                 return status;
5661
5662         p = xdr_inline_decode(xdr, 8);
5663         if (unlikely(!p))
5664                 return -EIO;
5665         xdr_decode_hyper(p, &res->clientid);
5666         p = xdr_inline_decode(xdr, 12);
5667         if (unlikely(!p))
5668                 return -EIO;
5669         res->seqid = be32_to_cpup(p++);
5670         res->flags = be32_to_cpup(p++);
5671
5672         res->state_protect.how = be32_to_cpup(p);
5673         switch (res->state_protect.how) {
5674         case SP4_NONE:
5675                 break;
5676         case SP4_MACH_CRED:
5677                 status = decode_op_map(xdr, &res->state_protect.enforce);
5678                 if (status)
5679                         return status;
5680                 status = decode_op_map(xdr, &res->state_protect.allow);
5681                 if (status)
5682                         return status;
5683                 break;
5684         default:
5685                 WARN_ON_ONCE(1);
5686                 return -EIO;
5687         }
5688
5689         /* server_owner4.so_minor_id */
5690         p = xdr_inline_decode(xdr, 8);
5691         if (unlikely(!p))
5692                 return -EIO;
5693         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5694
5695         /* server_owner4.so_major_id */
5696         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5697         if (unlikely(status))
5698                 return status;
5699         memcpy(res->server_owner->major_id, dummy_str, dummy);
5700         res->server_owner->major_id_sz = dummy;
5701
5702         /* server_scope4 */
5703         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5704         if (unlikely(status))
5705                 return status;
5706         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5707         res->server_scope->server_scope_sz = dummy;
5708
5709         /* Implementation Id */
5710         p = xdr_inline_decode(xdr, 4);
5711         if (unlikely(!p))
5712                 return -EIO;
5713         impl_id_count = be32_to_cpup(p++);
5714
5715         if (impl_id_count) {
5716                 /* nii_domain */
5717                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5718                 if (unlikely(status))
5719                         return status;
5720                 memcpy(res->impl_id->domain, dummy_str, dummy);
5721
5722                 /* nii_name */
5723                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5724                 if (unlikely(status))
5725                         return status;
5726                 memcpy(res->impl_id->name, dummy_str, dummy);
5727
5728                 /* nii_date */
5729                 p = xdr_inline_decode(xdr, 12);
5730                 if (unlikely(!p))
5731                         return -EIO;
5732                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5733                 res->impl_id->date.nseconds = be32_to_cpup(p);
5734
5735                 /* if there's more than one entry, ignore the rest */
5736         }
5737         return 0;
5738 }
5739
5740 static int decode_chan_attrs(struct xdr_stream *xdr,
5741                              struct nfs4_channel_attrs *attrs)
5742 {
5743         __be32 *p;
5744         u32 nr_attrs, val;
5745
5746         p = xdr_inline_decode(xdr, 28);
5747         if (unlikely(!p))
5748                 return -EIO;
5749         val = be32_to_cpup(p++);        /* headerpadsz */
5750         if (val)
5751                 return -EINVAL;         /* no support for header padding yet */
5752         attrs->max_rqst_sz = be32_to_cpup(p++);
5753         attrs->max_resp_sz = be32_to_cpup(p++);
5754         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5755         attrs->max_ops = be32_to_cpup(p++);
5756         attrs->max_reqs = be32_to_cpup(p++);
5757         nr_attrs = be32_to_cpup(p);
5758         if (unlikely(nr_attrs > 1)) {
5759                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5760                         "count %u\n", __func__, nr_attrs);
5761                 return -EINVAL;
5762         }
5763         if (nr_attrs == 1) {
5764                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5765                 if (unlikely(!p))
5766                         return -EIO;
5767         }
5768         return 0;
5769 }
5770
5771 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5772 {
5773         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5774 }
5775
5776 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5777                                 struct nfs41_bind_conn_to_session_res *res)
5778 {
5779         __be32 *p;
5780         int status;
5781
5782         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5783         if (!status)
5784                 status = decode_sessionid(xdr, &res->sessionid);
5785         if (unlikely(status))
5786                 return status;
5787
5788         /* dir flags, rdma mode bool */
5789         p = xdr_inline_decode(xdr, 8);
5790         if (unlikely(!p))
5791                 return -EIO;
5792
5793         res->dir = be32_to_cpup(p++);
5794         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5795                 return -EIO;
5796         if (be32_to_cpup(p) == 0)
5797                 res->use_conn_in_rdma_mode = false;
5798         else
5799                 res->use_conn_in_rdma_mode = true;
5800
5801         return 0;
5802 }
5803
5804 static int decode_create_session(struct xdr_stream *xdr,
5805                                  struct nfs41_create_session_res *res)
5806 {
5807         __be32 *p;
5808         int status;
5809
5810         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5811         if (!status)
5812                 status = decode_sessionid(xdr, &res->sessionid);
5813         if (unlikely(status))
5814                 return status;
5815
5816         /* seqid, flags */
5817         p = xdr_inline_decode(xdr, 8);
5818         if (unlikely(!p))
5819                 return -EIO;
5820         res->seqid = be32_to_cpup(p++);
5821         res->flags = be32_to_cpup(p);
5822
5823         /* Channel attributes */
5824         status = decode_chan_attrs(xdr, &res->fc_attrs);
5825         if (!status)
5826                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5827         return status;
5828 }
5829
5830 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5831 {
5832         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5833 }
5834
5835 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5836 {
5837         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5838 }
5839
5840 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5841 {
5842         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5843 }
5844 #endif /* CONFIG_NFS_V4_1 */
5845
5846 static int decode_sequence(struct xdr_stream *xdr,
5847                            struct nfs4_sequence_res *res,
5848                            struct rpc_rqst *rqstp)
5849 {
5850 #if defined(CONFIG_NFS_V4_1)
5851         struct nfs4_session *session;
5852         struct nfs4_sessionid id;
5853         u32 dummy;
5854         int status;
5855         __be32 *p;
5856
5857         if (res->sr_slot == NULL)
5858                 return 0;
5859         if (!res->sr_slot->table->session)
5860                 return 0;
5861
5862         status = decode_op_hdr(xdr, OP_SEQUENCE);
5863         if (!status)
5864                 status = decode_sessionid(xdr, &id);
5865         if (unlikely(status))
5866                 goto out_err;
5867
5868         /*
5869          * If the server returns different values for sessionID, slotID or
5870          * sequence number, the server is looney tunes.
5871          */
5872         status = -EREMOTEIO;
5873         session = res->sr_slot->table->session;
5874
5875         if (memcmp(id.data, session->sess_id.data,
5876                    NFS4_MAX_SESSIONID_LEN)) {
5877                 dprintk("%s Invalid session id\n", __func__);
5878                 goto out_err;
5879         }
5880
5881         p = xdr_inline_decode(xdr, 20);
5882         if (unlikely(!p))
5883                 goto out_overflow;
5884
5885         /* seqid */
5886         dummy = be32_to_cpup(p++);
5887         if (dummy != res->sr_slot->seq_nr) {
5888                 dprintk("%s Invalid sequence number\n", __func__);
5889                 goto out_err;
5890         }
5891         /* slot id */
5892         dummy = be32_to_cpup(p++);
5893         if (dummy != res->sr_slot->slot_nr) {
5894                 dprintk("%s Invalid slot id\n", __func__);
5895                 goto out_err;
5896         }
5897         /* highest slot id */
5898         res->sr_highest_slotid = be32_to_cpup(p++);
5899         /* target highest slot id */
5900         res->sr_target_highest_slotid = be32_to_cpup(p++);
5901         /* result flags */
5902         res->sr_status_flags = be32_to_cpup(p);
5903         status = 0;
5904 out_err:
5905         res->sr_status = status;
5906         return status;
5907 out_overflow:
5908         status = -EIO;
5909         goto out_err;
5910 #else  /* CONFIG_NFS_V4_1 */
5911         return 0;
5912 #endif /* CONFIG_NFS_V4_1 */
5913 }
5914
5915 #if defined(CONFIG_NFS_V4_1)
5916 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5917 {
5918         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5919         return decode_stateid(xdr, stateid);
5920 }
5921
5922 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5923                                 struct nfs4_getdeviceinfo_res *res)
5924 {
5925         struct pnfs_device *pdev = res->pdev;
5926         __be32 *p;
5927         uint32_t len, type;
5928         int status;
5929
5930         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5931         if (status) {
5932                 if (status == -ETOOSMALL) {
5933                         p = xdr_inline_decode(xdr, 4);
5934                         if (unlikely(!p))
5935                                 return -EIO;
5936                         pdev->mincount = be32_to_cpup(p);
5937                         dprintk("%s: Min count too small. mincnt = %u\n",
5938                                 __func__, pdev->mincount);
5939                 }
5940                 return status;
5941         }
5942
5943         p = xdr_inline_decode(xdr, 8);
5944         if (unlikely(!p))
5945                 return -EIO;
5946         type = be32_to_cpup(p++);
5947         if (type != pdev->layout_type) {
5948                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5949                         __func__, pdev->layout_type, type);
5950                 return -EINVAL;
5951         }
5952         /*
5953          * Get the length of the opaque device_addr4. xdr_read_pages places
5954          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5955          * and places the remaining xdr data in xdr_buf->tail
5956          */
5957         pdev->mincount = be32_to_cpup(p);
5958         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5959                 return -EIO;
5960
5961         /* Parse notification bitmap, verifying that it is zero. */
5962         p = xdr_inline_decode(xdr, 4);
5963         if (unlikely(!p))
5964                 return -EIO;
5965         len = be32_to_cpup(p);
5966         if (len) {
5967                 uint32_t i;
5968
5969                 p = xdr_inline_decode(xdr, 4 * len);
5970                 if (unlikely(!p))
5971                         return -EIO;
5972
5973                 res->notification = be32_to_cpup(p++);
5974                 for (i = 1; i < len; i++) {
5975                         if (be32_to_cpup(p++)) {
5976                                 dprintk("%s: unsupported notification\n",
5977                                         __func__);
5978                                 return -EIO;
5979                         }
5980                 }
5981         }
5982         return 0;
5983 }
5984
5985 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5986                             struct nfs4_layoutget_res *res)
5987 {
5988         __be32 *p;
5989         int status;
5990         u32 layout_count;
5991         u32 recvd;
5992
5993         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5994         if (status)
5995                 goto out;
5996         p = xdr_inline_decode(xdr, 4);
5997         if (unlikely(!p))
5998                 goto out_overflow;
5999         res->return_on_close = be32_to_cpup(p);
6000         decode_layout_stateid(xdr, &res->stateid);
6001         p = xdr_inline_decode(xdr, 4);
6002         if (unlikely(!p))
6003                 goto out_overflow;
6004         layout_count = be32_to_cpup(p);
6005         if (!layout_count) {
6006                 dprintk("%s: server responded with empty layout array\n",
6007                         __func__);
6008                 status = -EINVAL;
6009                 goto out;
6010         }
6011
6012         p = xdr_inline_decode(xdr, 28);
6013         if (unlikely(!p))
6014                 goto out_overflow;
6015         p = xdr_decode_hyper(p, &res->range.offset);
6016         p = xdr_decode_hyper(p, &res->range.length);
6017         res->range.iomode = be32_to_cpup(p++);
6018         res->type = be32_to_cpup(p++);
6019         res->layoutp->len = be32_to_cpup(p);
6020
6021         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6022                 __func__,
6023                 (unsigned long)res->range.offset,
6024                 (unsigned long)res->range.length,
6025                 res->range.iomode,
6026                 res->type,
6027                 res->layoutp->len);
6028
6029         recvd = xdr_read_pages(xdr, res->layoutp->len);
6030         if (res->layoutp->len > recvd) {
6031                 dprintk("NFS: server cheating in layoutget reply: "
6032                                 "layout len %u > recvd %u\n",
6033                                 res->layoutp->len, recvd);
6034                 status = -EINVAL;
6035                 goto out;
6036         }
6037
6038         if (layout_count > 1) {
6039                 /* We only handle a length one array at the moment.  Any
6040                  * further entries are just ignored.  Note that this means
6041                  * the client may see a response that is less than the
6042                  * minimum it requested.
6043                  */
6044                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6045                         __func__, layout_count);
6046         }
6047
6048 out:
6049         res->status = status;
6050         return status;
6051 out_overflow:
6052         status = -EIO;
6053         goto out;
6054 }
6055
6056 static int decode_layoutreturn(struct xdr_stream *xdr,
6057                                struct nfs4_layoutreturn_res *res)
6058 {
6059         __be32 *p;
6060         int status;
6061
6062         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6063         if (status)
6064                 return status;
6065         p = xdr_inline_decode(xdr, 4);
6066         if (unlikely(!p))
6067                 return -EIO;
6068         res->lrs_present = be32_to_cpup(p);
6069         if (res->lrs_present)
6070                 status = decode_layout_stateid(xdr, &res->stateid);
6071         else
6072                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6073         return status;
6074 }
6075
6076 static int decode_layoutcommit(struct xdr_stream *xdr,
6077                                struct rpc_rqst *req,
6078                                struct nfs4_layoutcommit_res *res)
6079 {
6080         __be32 *p;
6081         __u32 sizechanged;
6082         int status;
6083
6084         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6085         res->status = status;
6086         if (status)
6087                 return status;
6088
6089         p = xdr_inline_decode(xdr, 4);
6090         if (unlikely(!p))
6091                 return -EIO;
6092         sizechanged = be32_to_cpup(p);
6093
6094         if (sizechanged) {
6095                 /* throw away new size */
6096                 p = xdr_inline_decode(xdr, 8);
6097                 if (unlikely(!p))
6098                         return -EIO;
6099         }
6100         return 0;
6101 }
6102
6103 static int decode_test_stateid(struct xdr_stream *xdr,
6104                                struct nfs41_test_stateid_res *res)
6105 {
6106         __be32 *p;
6107         int status;
6108         int num_res;
6109
6110         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6111         if (status)
6112                 return status;
6113
6114         p = xdr_inline_decode(xdr, 4);
6115         if (unlikely(!p))
6116                 return -EIO;
6117         num_res = be32_to_cpup(p++);
6118         if (num_res != 1)
6119                 return -EIO;
6120
6121         p = xdr_inline_decode(xdr, 4);
6122         if (unlikely(!p))
6123                 return -EIO;
6124         res->status = be32_to_cpup(p++);
6125
6126         return status;
6127 }
6128
6129 static int decode_free_stateid(struct xdr_stream *xdr,
6130                                struct nfs41_free_stateid_res *res)
6131 {
6132         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6133         return res->status;
6134 }
6135 #else
6136 static inline
6137 int decode_layoutreturn(struct xdr_stream *xdr,
6138                                struct nfs4_layoutreturn_res *res)
6139 {
6140         return 0;
6141 }
6142
6143 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6144                             struct nfs4_layoutget_res *res)
6145 {
6146         return 0;
6147 }
6148
6149 #endif /* CONFIG_NFS_V4_1 */
6150
6151 /*
6152  * END OF "GENERIC" DECODE ROUTINES.
6153  */
6154
6155 /*
6156  * Decode OPEN_DOWNGRADE response
6157  */
6158 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6159                                        struct xdr_stream *xdr,
6160                                        void *data)
6161 {
6162         struct nfs_closeres *res = data;
6163         struct compound_hdr hdr;
6164         int status;
6165
6166         status = decode_compound_hdr(xdr, &hdr);
6167         if (status)
6168                 goto out;
6169         status = decode_sequence(xdr, &res->seq_res, rqstp);
6170         if (status)
6171                 goto out;
6172         status = decode_putfh(xdr);
6173         if (status)
6174                 goto out;
6175         if (res->lr_res) {
6176                 status = decode_layoutreturn(xdr, res->lr_res);
6177                 res->lr_ret = status;
6178                 if (status)
6179                         goto out;
6180         }
6181         status = decode_open_downgrade(xdr, res);
6182 out:
6183         return status;
6184 }
6185
6186 /*
6187  * Decode ACCESS response
6188  */
6189 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6190                                void *data)
6191 {
6192         struct nfs4_accessres *res = data;
6193         struct compound_hdr hdr;
6194         int status;
6195
6196         status = decode_compound_hdr(xdr, &hdr);
6197         if (status)
6198                 goto out;
6199         status = decode_sequence(xdr, &res->seq_res, rqstp);
6200         if (status)
6201                 goto out;
6202         status = decode_putfh(xdr);
6203         if (status != 0)
6204                 goto out;
6205         status = decode_access(xdr, &res->supported, &res->access);
6206         if (status != 0)
6207                 goto out;
6208         if (res->fattr)
6209                 decode_getfattr(xdr, res->fattr, res->server);
6210 out:
6211         return status;
6212 }
6213
6214 /*
6215  * Decode LOOKUP response
6216  */
6217 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6218                                void *data)
6219 {
6220         struct nfs4_lookup_res *res = data;
6221         struct compound_hdr hdr;
6222         int status;
6223
6224         status = decode_compound_hdr(xdr, &hdr);
6225         if (status)
6226                 goto out;
6227         status = decode_sequence(xdr, &res->seq_res, rqstp);
6228         if (status)
6229                 goto out;
6230         status = decode_putfh(xdr);
6231         if (status)
6232                 goto out;
6233         status = decode_lookup(xdr);
6234         if (status)
6235                 goto out;
6236         status = decode_getfh(xdr, res->fh);
6237         if (status)
6238                 goto out;
6239         status = decode_getfattr(xdr, res->fattr, res->server);
6240 out:
6241         return status;
6242 }
6243
6244 /*
6245  * Decode LOOKUPP response
6246  */
6247 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6248                 void *data)
6249 {
6250         struct nfs4_lookupp_res *res = data;
6251         struct compound_hdr hdr;
6252         int status;
6253
6254         status = decode_compound_hdr(xdr, &hdr);
6255         if (status)
6256                 goto out;
6257         status = decode_sequence(xdr, &res->seq_res, rqstp);
6258         if (status)
6259                 goto out;
6260         status = decode_putfh(xdr);
6261         if (status)
6262                 goto out;
6263         status = decode_lookupp(xdr);
6264         if (status)
6265                 goto out;
6266         status = decode_getfh(xdr, res->fh);
6267         if (status)
6268                 goto out;
6269         status = decode_getfattr(xdr, res->fattr, res->server);
6270 out:
6271         return status;
6272 }
6273
6274 /*
6275  * Decode LOOKUP_ROOT response
6276  */
6277 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6278                                     struct xdr_stream *xdr,
6279                                     void *data)
6280 {
6281         struct nfs4_lookup_res *res = data;
6282         struct compound_hdr hdr;
6283         int status;
6284
6285         status = decode_compound_hdr(xdr, &hdr);
6286         if (status)
6287                 goto out;
6288         status = decode_sequence(xdr, &res->seq_res, rqstp);
6289         if (status)
6290                 goto out;
6291         status = decode_putrootfh(xdr);
6292         if (status)
6293                 goto out;
6294         status = decode_getfh(xdr, res->fh);
6295         if (status == 0)
6296                 status = decode_getfattr(xdr, res->fattr, res->server);
6297 out:
6298         return status;
6299 }
6300
6301 /*
6302  * Decode REMOVE response
6303  */
6304 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6305                                void *data)
6306 {
6307         struct nfs_removeres *res = data;
6308         struct compound_hdr hdr;
6309         int status;
6310
6311         status = decode_compound_hdr(xdr, &hdr);
6312         if (status)
6313                 goto out;
6314         status = decode_sequence(xdr, &res->seq_res, rqstp);
6315         if (status)
6316                 goto out;
6317         status = decode_putfh(xdr);
6318         if (status)
6319                 goto out;
6320         status = decode_remove(xdr, &res->cinfo);
6321 out:
6322         return status;
6323 }
6324
6325 /*
6326  * Decode RENAME response
6327  */
6328 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6329                                void *data)
6330 {
6331         struct nfs_renameres *res = data;
6332         struct compound_hdr hdr;
6333         int status;
6334
6335         status = decode_compound_hdr(xdr, &hdr);
6336         if (status)
6337                 goto out;
6338         status = decode_sequence(xdr, &res->seq_res, rqstp);
6339         if (status)
6340                 goto out;
6341         status = decode_putfh(xdr);
6342         if (status)
6343                 goto out;
6344         status = decode_savefh(xdr);
6345         if (status)
6346                 goto out;
6347         status = decode_putfh(xdr);
6348         if (status)
6349                 goto out;
6350         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6351 out:
6352         return status;
6353 }
6354
6355 /*
6356  * Decode LINK response
6357  */
6358 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6359                              void *data)
6360 {
6361         struct nfs4_link_res *res = data;
6362         struct compound_hdr hdr;
6363         int status;
6364
6365         status = decode_compound_hdr(xdr, &hdr);
6366         if (status)
6367                 goto out;
6368         status = decode_sequence(xdr, &res->seq_res, rqstp);
6369         if (status)
6370                 goto out;
6371         status = decode_putfh(xdr);
6372         if (status)
6373                 goto out;
6374         status = decode_savefh(xdr);
6375         if (status)
6376                 goto out;
6377         status = decode_putfh(xdr);
6378         if (status)
6379                 goto out;
6380         status = decode_link(xdr, &res->cinfo);
6381         if (status)
6382                 goto out;
6383         /*
6384          * Note order: OP_LINK leaves the directory as the current
6385          *             filehandle.
6386          */
6387         status = decode_restorefh(xdr);
6388         if (status)
6389                 goto out;
6390         decode_getfattr(xdr, res->fattr, res->server);
6391 out:
6392         return status;
6393 }
6394
6395 /*
6396  * Decode CREATE response
6397  */
6398 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6399                                void *data)
6400 {
6401         struct nfs4_create_res *res = data;
6402         struct compound_hdr hdr;
6403         int status;
6404
6405         status = decode_compound_hdr(xdr, &hdr);
6406         if (status)
6407                 goto out;
6408         status = decode_sequence(xdr, &res->seq_res, rqstp);
6409         if (status)
6410                 goto out;
6411         status = decode_putfh(xdr);
6412         if (status)
6413                 goto out;
6414         status = decode_create(xdr, &res->dir_cinfo);
6415         if (status)
6416                 goto out;
6417         status = decode_getfh(xdr, res->fh);
6418         if (status)
6419                 goto out;
6420         decode_getfattr(xdr, res->fattr, res->server);
6421 out:
6422         return status;
6423 }
6424
6425 /*
6426  * Decode SYMLINK response
6427  */
6428 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6429                                 void *res)
6430 {
6431         return nfs4_xdr_dec_create(rqstp, xdr, res);
6432 }
6433
6434 /*
6435  * Decode GETATTR response
6436  */
6437 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6438                                 void *data)
6439 {
6440         struct nfs4_getattr_res *res = data;
6441         struct compound_hdr hdr;
6442         int status;
6443
6444         status = decode_compound_hdr(xdr, &hdr);
6445         if (status)
6446                 goto out;
6447         status = decode_sequence(xdr, &res->seq_res, rqstp);
6448         if (status)
6449                 goto out;
6450         status = decode_putfh(xdr);
6451         if (status)
6452                 goto out;
6453         status = decode_getfattr(xdr, res->fattr, res->server);
6454 out:
6455         return status;
6456 }
6457
6458 /*
6459  * Encode an SETACL request
6460  */
6461 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6462                                 const void *data)
6463 {
6464         const struct nfs_setaclargs *args = data;
6465         struct compound_hdr hdr = {
6466                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6467         };
6468
6469         encode_compound_hdr(xdr, req, &hdr);
6470         encode_sequence(xdr, &args->seq_args, &hdr);
6471         encode_putfh(xdr, args->fh, &hdr);
6472         encode_setacl(xdr, args, &hdr);
6473         encode_nops(&hdr);
6474 }
6475
6476 /*
6477  * Decode SETACL response
6478  */
6479 static int
6480 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6481                     void *data)
6482 {
6483         struct nfs_setaclres *res = data;
6484         struct compound_hdr hdr;
6485         int status;
6486
6487         status = decode_compound_hdr(xdr, &hdr);
6488         if (status)
6489                 goto out;
6490         status = decode_sequence(xdr, &res->seq_res, rqstp);
6491         if (status)
6492                 goto out;
6493         status = decode_putfh(xdr);
6494         if (status)
6495                 goto out;
6496         status = decode_setattr(xdr);
6497 out:
6498         return status;
6499 }
6500
6501 /*
6502  * Decode GETACL response
6503  */
6504 static int
6505 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6506                     void *data)
6507 {
6508         struct nfs_getaclres *res = data;
6509         struct compound_hdr hdr;
6510         int status;
6511
6512         if (res->acl_scratch != NULL)
6513                 xdr_set_scratch_page(xdr, res->acl_scratch);
6514         status = decode_compound_hdr(xdr, &hdr);
6515         if (status)
6516                 goto out;
6517         status = decode_sequence(xdr, &res->seq_res, rqstp);
6518         if (status)
6519                 goto out;
6520         status = decode_putfh(xdr);
6521         if (status)
6522                 goto out;
6523         status = decode_getacl(xdr, rqstp, res, res->acl_type);
6524
6525 out:
6526         return status;
6527 }
6528
6529 /*
6530  * Decode CLOSE response
6531  */
6532 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6533                               void *data)
6534 {
6535         struct nfs_closeres *res = data;
6536         struct compound_hdr hdr;
6537         int status;
6538
6539         status = decode_compound_hdr(xdr, &hdr);
6540         if (status)
6541                 goto out;
6542         status = decode_sequence(xdr, &res->seq_res, rqstp);
6543         if (status)
6544                 goto out;
6545         status = decode_putfh(xdr);
6546         if (status)
6547                 goto out;
6548         if (res->lr_res) {
6549                 status = decode_layoutreturn(xdr, res->lr_res);
6550                 res->lr_ret = status;
6551                 if (status)
6552                         goto out;
6553         }
6554         if (res->fattr != NULL) {
6555                 status = decode_getfattr(xdr, res->fattr, res->server);
6556                 if (status != 0)
6557                         goto out;
6558         }
6559         status = decode_close(xdr, res);
6560 out:
6561         return status;
6562 }
6563
6564 /*
6565  * Decode OPEN response
6566  */
6567 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6568                              void *data)
6569 {
6570         struct nfs_openres *res = data;
6571         struct compound_hdr hdr;
6572         int status;
6573
6574         status = decode_compound_hdr(xdr, &hdr);
6575         if (status)
6576                 goto out;
6577         status = decode_sequence(xdr, &res->seq_res, rqstp);
6578         if (status)
6579                 goto out;
6580         status = decode_putfh(xdr);
6581         if (status)
6582                 goto out;
6583         status = decode_open(xdr, res);
6584         if (status)
6585                 goto out;
6586         status = decode_getfh(xdr, &res->fh);
6587         if (status)
6588                 goto out;
6589         if (res->access_request)
6590                 decode_access(xdr, &res->access_supported, &res->access_result);
6591         decode_getfattr(xdr, res->f_attr, res->server);
6592         if (res->lg_res)
6593                 decode_layoutget(xdr, rqstp, res->lg_res);
6594 out:
6595         return status;
6596 }
6597
6598 /*
6599  * Decode OPEN_CONFIRM response
6600  */
6601 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6602                                      struct xdr_stream *xdr,
6603                                      void *data)
6604 {
6605         struct nfs_open_confirmres *res = data;
6606         struct compound_hdr hdr;
6607         int status;
6608
6609         status = decode_compound_hdr(xdr, &hdr);
6610         if (status)
6611                 goto out;
6612         status = decode_putfh(xdr);
6613         if (status)
6614                 goto out;
6615         status = decode_open_confirm(xdr, res);
6616 out:
6617         return status;
6618 }
6619
6620 /*
6621  * Decode OPEN response
6622  */
6623 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6624                                     struct xdr_stream *xdr,
6625                                     void *data)
6626 {
6627         struct nfs_openres *res = data;
6628         struct compound_hdr hdr;
6629         int status;
6630
6631         status = decode_compound_hdr(xdr, &hdr);
6632         if (status)
6633                 goto out;
6634         status = decode_sequence(xdr, &res->seq_res, rqstp);
6635         if (status)
6636                 goto out;
6637         status = decode_putfh(xdr);
6638         if (status)
6639                 goto out;
6640         status = decode_open(xdr, res);
6641         if (status)
6642                 goto out;
6643         if (res->access_request)
6644                 decode_access(xdr, &res->access_supported, &res->access_result);
6645         decode_getfattr(xdr, res->f_attr, res->server);
6646         if (res->lg_res)
6647                 decode_layoutget(xdr, rqstp, res->lg_res);
6648 out:
6649         return status;
6650 }
6651
6652 /*
6653  * Decode SETATTR response
6654  */
6655 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6656                                 struct xdr_stream *xdr,
6657                                 void *data)
6658 {
6659         struct nfs_setattrres *res = data;
6660         struct compound_hdr hdr;
6661         int status;
6662
6663         status = decode_compound_hdr(xdr, &hdr);
6664         if (status)
6665                 goto out;
6666         status = decode_sequence(xdr, &res->seq_res, rqstp);
6667         if (status)
6668                 goto out;
6669         status = decode_putfh(xdr);
6670         if (status)
6671                 goto out;
6672         status = decode_setattr(xdr);
6673         if (status)
6674                 goto out;
6675         decode_getfattr(xdr, res->fattr, res->server);
6676 out:
6677         return status;
6678 }
6679
6680 /*
6681  * Decode LOCK response
6682  */
6683 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6684                              void *data)
6685 {
6686         struct nfs_lock_res *res = data;
6687         struct compound_hdr hdr;
6688         int status;
6689
6690         status = decode_compound_hdr(xdr, &hdr);
6691         if (status)
6692                 goto out;
6693         status = decode_sequence(xdr, &res->seq_res, rqstp);
6694         if (status)
6695                 goto out;
6696         status = decode_putfh(xdr);
6697         if (status)
6698                 goto out;
6699         status = decode_lock(xdr, res);
6700 out:
6701         return status;
6702 }
6703
6704 /*
6705  * Decode LOCKT response
6706  */
6707 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6708                               void *data)
6709 {
6710         struct nfs_lockt_res *res = data;
6711         struct compound_hdr hdr;
6712         int status;
6713
6714         status = decode_compound_hdr(xdr, &hdr);
6715         if (status)
6716                 goto out;
6717         status = decode_sequence(xdr, &res->seq_res, rqstp);
6718         if (status)
6719                 goto out;
6720         status = decode_putfh(xdr);
6721         if (status)
6722                 goto out;
6723         status = decode_lockt(xdr, res);
6724 out:
6725         return status;
6726 }
6727
6728 /*
6729  * Decode LOCKU response
6730  */
6731 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6732                               void *data)
6733 {
6734         struct nfs_locku_res *res = data;
6735         struct compound_hdr hdr;
6736         int status;
6737
6738         status = decode_compound_hdr(xdr, &hdr);
6739         if (status)
6740                 goto out;
6741         status = decode_sequence(xdr, &res->seq_res, rqstp);
6742         if (status)
6743                 goto out;
6744         status = decode_putfh(xdr);
6745         if (status)
6746                 goto out;
6747         status = decode_locku(xdr, res);
6748 out:
6749         return status;
6750 }
6751
6752 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6753                                           struct xdr_stream *xdr, void *dummy)
6754 {
6755         struct compound_hdr hdr;
6756         int status;
6757
6758         status = decode_compound_hdr(xdr, &hdr);
6759         if (!status)
6760                 status = decode_release_lockowner(xdr);
6761         return status;
6762 }
6763
6764 /*
6765  * Decode READLINK response
6766  */
6767 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6768                                  struct xdr_stream *xdr,
6769                                  void *data)
6770 {
6771         struct nfs4_readlink_res *res = data;
6772         struct compound_hdr hdr;
6773         int status;
6774
6775         status = decode_compound_hdr(xdr, &hdr);
6776         if (status)
6777                 goto out;
6778         status = decode_sequence(xdr, &res->seq_res, rqstp);
6779         if (status)
6780                 goto out;
6781         status = decode_putfh(xdr);
6782         if (status)
6783                 goto out;
6784         status = decode_readlink(xdr, rqstp);
6785 out:
6786         return status;
6787 }
6788
6789 /*
6790  * Decode READDIR response
6791  */
6792 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6793                                 void *data)
6794 {
6795         struct nfs4_readdir_res *res = data;
6796         struct compound_hdr hdr;
6797         int status;
6798
6799         status = decode_compound_hdr(xdr, &hdr);
6800         if (status)
6801                 goto out;
6802         status = decode_sequence(xdr, &res->seq_res, rqstp);
6803         if (status)
6804                 goto out;
6805         status = decode_putfh(xdr);
6806         if (status)
6807                 goto out;
6808         status = decode_readdir(xdr, rqstp, res);
6809 out:
6810         return status;
6811 }
6812
6813 /*
6814  * Decode Read response
6815  */
6816 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6817                              void *data)
6818 {
6819         struct nfs_pgio_res *res = data;
6820         struct compound_hdr hdr;
6821         int status;
6822
6823         status = decode_compound_hdr(xdr, &hdr);
6824         res->op_status = hdr.status;
6825         if (status)
6826                 goto out;
6827         status = decode_sequence(xdr, &res->seq_res, rqstp);
6828         if (status)
6829                 goto out;
6830         status = decode_putfh(xdr);
6831         if (status)
6832                 goto out;
6833         status = decode_read(xdr, rqstp, res);
6834         if (!status)
6835                 status = res->count;
6836 out:
6837         return status;
6838 }
6839
6840 /*
6841  * Decode WRITE response
6842  */
6843 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6844                               void *data)
6845 {
6846         struct nfs_pgio_res *res = data;
6847         struct compound_hdr hdr;
6848         int status;
6849
6850         status = decode_compound_hdr(xdr, &hdr);
6851         res->op_status = hdr.status;
6852         if (status)
6853                 goto out;
6854         status = decode_sequence(xdr, &res->seq_res, rqstp);
6855         if (status)
6856                 goto out;
6857         status = decode_putfh(xdr);
6858         if (status)
6859                 goto out;
6860         status = decode_write(xdr, res);
6861         if (status)
6862                 goto out;
6863         if (res->fattr)
6864                 decode_getfattr(xdr, res->fattr, res->server);
6865         if (!status)
6866                 status = res->count;
6867 out:
6868         return status;
6869 }
6870
6871 /*
6872  * Decode COMMIT response
6873  */
6874 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6875                                void *data)
6876 {
6877         struct nfs_commitres *res = data;
6878         struct compound_hdr hdr;
6879         int status;
6880
6881         status = decode_compound_hdr(xdr, &hdr);
6882         res->op_status = hdr.status;
6883         if (status)
6884                 goto out;
6885         status = decode_sequence(xdr, &res->seq_res, rqstp);
6886         if (status)
6887                 goto out;
6888         status = decode_putfh(xdr);
6889         if (status)
6890                 goto out;
6891         status = decode_commit(xdr, res);
6892 out:
6893         return status;
6894 }
6895
6896 /*
6897  * Decode FSINFO response
6898  */
6899 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6900                                void *data)
6901 {
6902         struct nfs4_fsinfo_res *res = data;
6903         struct compound_hdr hdr;
6904         int status;
6905
6906         status = decode_compound_hdr(xdr, &hdr);
6907         if (!status)
6908                 status = decode_sequence(xdr, &res->seq_res, req);
6909         if (!status)
6910                 status = decode_putfh(xdr);
6911         if (!status)
6912                 status = decode_fsinfo(xdr, res->fsinfo);
6913         return status;
6914 }
6915
6916 /*
6917  * Decode PATHCONF response
6918  */
6919 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6920                                  void *data)
6921 {
6922         struct nfs4_pathconf_res *res = data;
6923         struct compound_hdr hdr;
6924         int status;
6925
6926         status = decode_compound_hdr(xdr, &hdr);
6927         if (!status)
6928                 status = decode_sequence(xdr, &res->seq_res, req);
6929         if (!status)
6930                 status = decode_putfh(xdr);
6931         if (!status)
6932                 status = decode_pathconf(xdr, res->pathconf);
6933         return status;
6934 }
6935
6936 /*
6937  * Decode STATFS response
6938  */
6939 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6940                                void *data)
6941 {
6942         struct nfs4_statfs_res *res = data;
6943         struct compound_hdr hdr;
6944         int status;
6945
6946         status = decode_compound_hdr(xdr, &hdr);
6947         if (!status)
6948                 status = decode_sequence(xdr, &res->seq_res, req);
6949         if (!status)
6950                 status = decode_putfh(xdr);
6951         if (!status)
6952                 status = decode_statfs(xdr, res->fsstat);
6953         return status;
6954 }
6955
6956 /*
6957  * Decode GETATTR_BITMAP response
6958  */
6959 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6960                                     struct xdr_stream *xdr,
6961                                     void *data)
6962 {
6963         struct nfs4_server_caps_res *res = data;
6964         struct compound_hdr hdr;
6965         int status;
6966
6967         status = decode_compound_hdr(xdr, &hdr);
6968         if (status)
6969                 goto out;
6970         status = decode_sequence(xdr, &res->seq_res, req);
6971         if (status)
6972                 goto out;
6973         status = decode_putfh(xdr);
6974         if (status)
6975                 goto out;
6976         status = decode_server_caps(xdr, res);
6977 out:
6978         return status;
6979 }
6980
6981 /*
6982  * Decode RENEW response
6983  */
6984 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6985                               void *__unused)
6986 {
6987         struct compound_hdr hdr;
6988         int status;
6989
6990         status = decode_compound_hdr(xdr, &hdr);
6991         if (!status)
6992                 status = decode_renew(xdr);
6993         return status;
6994 }
6995
6996 /*
6997  * Decode SETCLIENTID response
6998  */
6999 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7000                                     struct xdr_stream *xdr,
7001                                     void *data)
7002 {
7003         struct nfs4_setclientid_res *res = data;
7004         struct compound_hdr hdr;
7005         int status;
7006
7007         status = decode_compound_hdr(xdr, &hdr);
7008         if (!status)
7009                 status = decode_setclientid(xdr, res);
7010         return status;
7011 }
7012
7013 /*
7014  * Decode SETCLIENTID_CONFIRM response
7015  */
7016 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7017                                             struct xdr_stream *xdr,
7018                                             void *data)
7019 {
7020         struct compound_hdr hdr;
7021         int status;
7022
7023         status = decode_compound_hdr(xdr, &hdr);
7024         if (!status)
7025                 status = decode_setclientid_confirm(xdr);
7026         return status;
7027 }
7028
7029 /*
7030  * Decode DELEGRETURN response
7031  */
7032 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7033                                     struct xdr_stream *xdr,
7034                                     void *data)
7035 {
7036         struct nfs4_delegreturnres *res = data;
7037         struct compound_hdr hdr;
7038         int status;
7039
7040         status = decode_compound_hdr(xdr, &hdr);
7041         if (status)
7042                 goto out;
7043         status = decode_sequence(xdr, &res->seq_res, rqstp);
7044         if (status)
7045                 goto out;
7046         status = decode_putfh(xdr);
7047         if (status != 0)
7048                 goto out;
7049         if (res->lr_res) {
7050                 status = decode_layoutreturn(xdr, res->lr_res);
7051                 res->lr_ret = status;
7052                 if (status)
7053                         goto out;
7054         }
7055         if (res->fattr) {
7056                 status = decode_getfattr(xdr, res->fattr, res->server);
7057                 if (status != 0)
7058                         goto out;
7059         }
7060         status = decode_delegreturn(xdr);
7061 out:
7062         return status;
7063 }
7064
7065 /*
7066  * Decode FS_LOCATIONS response
7067  */
7068 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7069                                      struct xdr_stream *xdr,
7070                                      void *data)
7071 {
7072         struct nfs4_fs_locations_res *res = data;
7073         struct compound_hdr hdr;
7074         int status;
7075
7076         status = decode_compound_hdr(xdr, &hdr);
7077         if (status)
7078                 goto out;
7079         status = decode_sequence(xdr, &res->seq_res, req);
7080         if (status)
7081                 goto out;
7082         status = decode_putfh(xdr);
7083         if (status)
7084                 goto out;
7085         if (res->migration) {
7086                 xdr_enter_page(xdr, PAGE_SIZE);
7087                 status = decode_getfattr_generic(xdr,
7088                                         res->fs_locations->fattr,
7089                                          NULL, res->fs_locations,
7090                                          res->fs_locations->server);
7091                 if (status)
7092                         goto out;
7093                 if (res->renew)
7094                         status = decode_renew(xdr);
7095         } else {
7096                 status = decode_lookup(xdr);
7097                 if (status)
7098                         goto out;
7099                 xdr_enter_page(xdr, PAGE_SIZE);
7100                 status = decode_getfattr_generic(xdr,
7101                                         res->fs_locations->fattr,
7102                                          NULL, res->fs_locations,
7103                                          res->fs_locations->server);
7104         }
7105 out:
7106         return status;
7107 }
7108
7109 /*
7110  * Decode SECINFO response
7111  */
7112 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7113                                 struct xdr_stream *xdr,
7114                                 void *data)
7115 {
7116         struct nfs4_secinfo_res *res = data;
7117         struct compound_hdr hdr;
7118         int status;
7119
7120         status = decode_compound_hdr(xdr, &hdr);
7121         if (status)
7122                 goto out;
7123         status = decode_sequence(xdr, &res->seq_res, rqstp);
7124         if (status)
7125                 goto out;
7126         status = decode_putfh(xdr);
7127         if (status)
7128                 goto out;
7129         status = decode_secinfo(xdr, res);
7130 out:
7131         return status;
7132 }
7133
7134 /*
7135  * Decode FSID_PRESENT response
7136  */
7137 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7138                                      struct xdr_stream *xdr,
7139                                      void *data)
7140 {
7141         struct nfs4_fsid_present_res *res = data;
7142         struct compound_hdr hdr;
7143         int status;
7144
7145         status = decode_compound_hdr(xdr, &hdr);
7146         if (status)
7147                 goto out;
7148         status = decode_sequence(xdr, &res->seq_res, rqstp);
7149         if (status)
7150                 goto out;
7151         status = decode_putfh(xdr);
7152         if (status)
7153                 goto out;
7154         status = decode_getfh(xdr, res->fh);
7155         if (status)
7156                 goto out;
7157         if (res->renew)
7158                 status = decode_renew(xdr);
7159 out:
7160         return status;
7161 }
7162
7163 #if defined(CONFIG_NFS_V4_1)
7164 /*
7165  * Decode BIND_CONN_TO_SESSION response
7166  */
7167 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7168                                         struct xdr_stream *xdr,
7169                                         void *res)
7170 {
7171         struct compound_hdr hdr;
7172         int status;
7173
7174         status = decode_compound_hdr(xdr, &hdr);
7175         if (!status)
7176                 status = decode_bind_conn_to_session(xdr, res);
7177         return status;
7178 }
7179
7180 /*
7181  * Decode EXCHANGE_ID response
7182  */
7183 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7184                                     struct xdr_stream *xdr,
7185                                     void *res)
7186 {
7187         struct compound_hdr hdr;
7188         int status;
7189
7190         status = decode_compound_hdr(xdr, &hdr);
7191         if (!status)
7192                 status = decode_exchange_id(xdr, res);
7193         return status;
7194 }
7195
7196 /*
7197  * Decode CREATE_SESSION response
7198  */
7199 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7200                                        struct xdr_stream *xdr,
7201                                        void *res)
7202 {
7203         struct compound_hdr hdr;
7204         int status;
7205
7206         status = decode_compound_hdr(xdr, &hdr);
7207         if (!status)
7208                 status = decode_create_session(xdr, res);
7209         return status;
7210 }
7211
7212 /*
7213  * Decode DESTROY_SESSION response
7214  */
7215 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7216                                         struct xdr_stream *xdr,
7217                                         void *res)
7218 {
7219         struct compound_hdr hdr;
7220         int status;
7221
7222         status = decode_compound_hdr(xdr, &hdr);
7223         if (!status)
7224                 status = decode_destroy_session(xdr, res);
7225         return status;
7226 }
7227
7228 /*
7229  * Decode DESTROY_CLIENTID response
7230  */
7231 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7232                                         struct xdr_stream *xdr,
7233                                         void *res)
7234 {
7235         struct compound_hdr hdr;
7236         int status;
7237
7238         status = decode_compound_hdr(xdr, &hdr);
7239         if (!status)
7240                 status = decode_destroy_clientid(xdr, res);
7241         return status;
7242 }
7243
7244 /*
7245  * Decode SEQUENCE response
7246  */
7247 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7248                                  struct xdr_stream *xdr,
7249                                  void *res)
7250 {
7251         struct compound_hdr hdr;
7252         int status;
7253
7254         status = decode_compound_hdr(xdr, &hdr);
7255         if (!status)
7256                 status = decode_sequence(xdr, res, rqstp);
7257         return status;
7258 }
7259
7260 #endif
7261
7262 /*
7263  * Decode GET_LEASE_TIME response
7264  */
7265 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7266                                        struct xdr_stream *xdr,
7267                                        void *data)
7268 {
7269         struct nfs4_get_lease_time_res *res = data;
7270         struct compound_hdr hdr;
7271         int status;
7272
7273         status = decode_compound_hdr(xdr, &hdr);
7274         if (!status)
7275                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7276         if (!status)
7277                 status = decode_putrootfh(xdr);
7278         if (!status)
7279                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7280         return status;
7281 }
7282
7283 #ifdef CONFIG_NFS_V4_1
7284
7285 /*
7286  * Decode RECLAIM_COMPLETE response
7287  */
7288 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7289                                          struct xdr_stream *xdr,
7290                                          void *data)
7291 {
7292         struct nfs41_reclaim_complete_res *res = data;
7293         struct compound_hdr hdr;
7294         int status;
7295
7296         status = decode_compound_hdr(xdr, &hdr);
7297         if (!status)
7298                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7299         if (!status)
7300                 status = decode_reclaim_complete(xdr, NULL);
7301         return status;
7302 }
7303
7304 /*
7305  * Decode GETDEVINFO response
7306  */
7307 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7308                                       struct xdr_stream *xdr,
7309                                       void *data)
7310 {
7311         struct nfs4_getdeviceinfo_res *res = data;
7312         struct compound_hdr hdr;
7313         int status;
7314
7315         status = decode_compound_hdr(xdr, &hdr);
7316         if (status != 0)
7317                 goto out;
7318         status = decode_sequence(xdr, &res->seq_res, rqstp);
7319         if (status != 0)
7320                 goto out;
7321         status = decode_getdeviceinfo(xdr, res);
7322 out:
7323         return status;
7324 }
7325
7326 /*
7327  * Decode LAYOUTGET response
7328  */
7329 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7330                                   struct xdr_stream *xdr,
7331                                   void *data)
7332 {
7333         struct nfs4_layoutget_res *res = data;
7334         struct compound_hdr hdr;
7335         int status;
7336
7337         status = decode_compound_hdr(xdr, &hdr);
7338         if (status)
7339                 goto out;
7340         status = decode_sequence(xdr, &res->seq_res, rqstp);
7341         if (status)
7342                 goto out;
7343         status = decode_putfh(xdr);
7344         if (status)
7345                 goto out;
7346         status = decode_layoutget(xdr, rqstp, res);
7347 out:
7348         return status;
7349 }
7350
7351 /*
7352  * Decode LAYOUTRETURN response
7353  */
7354 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7355                                      struct xdr_stream *xdr,
7356                                      void *data)
7357 {
7358         struct nfs4_layoutreturn_res *res = data;
7359         struct compound_hdr hdr;
7360         int status;
7361
7362         status = decode_compound_hdr(xdr, &hdr);
7363         if (status)
7364                 goto out;
7365         status = decode_sequence(xdr, &res->seq_res, rqstp);
7366         if (status)
7367                 goto out;
7368         status = decode_putfh(xdr);
7369         if (status)
7370                 goto out;
7371         status = decode_layoutreturn(xdr, res);
7372 out:
7373         return status;
7374 }
7375
7376 /*
7377  * Decode LAYOUTCOMMIT response
7378  */
7379 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7380                                      struct xdr_stream *xdr,
7381                                      void *data)
7382 {
7383         struct nfs4_layoutcommit_res *res = data;
7384         struct compound_hdr hdr;
7385         int status;
7386
7387         status = decode_compound_hdr(xdr, &hdr);
7388         if (status)
7389                 goto out;
7390         status = decode_sequence(xdr, &res->seq_res, rqstp);
7391         if (status)
7392                 goto out;
7393         status = decode_putfh(xdr);
7394         if (status)
7395                 goto out;
7396         status = decode_layoutcommit(xdr, rqstp, res);
7397         if (status)
7398                 goto out;
7399         decode_getfattr(xdr, res->fattr, res->server);
7400 out:
7401         return status;
7402 }
7403
7404 /*
7405  * Decode SECINFO_NO_NAME response
7406  */
7407 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7408                                         struct xdr_stream *xdr,
7409                                         void *data)
7410 {
7411         struct nfs4_secinfo_res *res = data;
7412         struct compound_hdr hdr;
7413         int status;
7414
7415         status = decode_compound_hdr(xdr, &hdr);
7416         if (status)
7417                 goto out;
7418         status = decode_sequence(xdr, &res->seq_res, rqstp);
7419         if (status)
7420                 goto out;
7421         status = decode_putrootfh(xdr);
7422         if (status)
7423                 goto out;
7424         status = decode_secinfo_no_name(xdr, res);
7425 out:
7426         return status;
7427 }
7428
7429 /*
7430  * Decode TEST_STATEID response
7431  */
7432 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7433                                      struct xdr_stream *xdr,
7434                                      void *data)
7435 {
7436         struct nfs41_test_stateid_res *res = data;
7437         struct compound_hdr hdr;
7438         int status;
7439
7440         status = decode_compound_hdr(xdr, &hdr);
7441         if (status)
7442                 goto out;
7443         status = decode_sequence(xdr, &res->seq_res, rqstp);
7444         if (status)
7445                 goto out;
7446         status = decode_test_stateid(xdr, res);
7447 out:
7448         return status;
7449 }
7450
7451 /*
7452  * Decode FREE_STATEID response
7453  */
7454 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7455                                      struct xdr_stream *xdr,
7456                                      void *data)
7457 {
7458         struct nfs41_free_stateid_res *res = data;
7459         struct compound_hdr hdr;
7460         int status;
7461
7462         status = decode_compound_hdr(xdr, &hdr);
7463         if (status)
7464                 goto out;
7465         status = decode_sequence(xdr, &res->seq_res, rqstp);
7466         if (status)
7467                 goto out;
7468         status = decode_free_stateid(xdr, res);
7469 out:
7470         return status;
7471 }
7472 #endif /* CONFIG_NFS_V4_1 */
7473
7474 /**
7475  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7476  *                      the local page cache.
7477  * @xdr: XDR stream where entry resides
7478  * @entry: buffer to fill in with entry data
7479  * @plus: boolean indicating whether this should be a readdirplus entry
7480  *
7481  * Returns zero if successful, otherwise a negative errno value is
7482  * returned.
7483  *
7484  * This function is not invoked during READDIR reply decoding, but
7485  * rather whenever an application invokes the getdents(2) system call
7486  * on a directory already in our cache.
7487  */
7488 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7489                        bool plus)
7490 {
7491         unsigned int savep;
7492         uint32_t bitmap[3] = {0};
7493         uint32_t len;
7494         uint64_t new_cookie;
7495         __be32 *p = xdr_inline_decode(xdr, 4);
7496         if (unlikely(!p))
7497                 return -EAGAIN;
7498         if (*p == xdr_zero) {
7499                 p = xdr_inline_decode(xdr, 4);
7500                 if (unlikely(!p))
7501                         return -EAGAIN;
7502                 if (*p == xdr_zero)
7503                         return -EAGAIN;
7504                 entry->eof = 1;
7505                 return -EBADCOOKIE;
7506         }
7507
7508         p = xdr_inline_decode(xdr, 12);
7509         if (unlikely(!p))
7510                 return -EAGAIN;
7511         p = xdr_decode_hyper(p, &new_cookie);
7512         entry->len = be32_to_cpup(p);
7513
7514         p = xdr_inline_decode(xdr, entry->len);
7515         if (unlikely(!p))
7516                 return -EAGAIN;
7517         entry->name = (const char *) p;
7518
7519         /*
7520          * In case the server doesn't return an inode number,
7521          * we fake one here.  (We don't use inode number 0,
7522          * since glibc seems to choke on it...)
7523          */
7524         entry->ino = 1;
7525         entry->fattr->valid = 0;
7526
7527         if (decode_attr_bitmap(xdr, bitmap) < 0)
7528                 return -EAGAIN;
7529
7530         if (decode_attr_length(xdr, &len, &savep) < 0)
7531                 return -EAGAIN;
7532
7533         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7534                         NULL, entry->server) < 0)
7535                 return -EAGAIN;
7536         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7537                 entry->ino = entry->fattr->mounted_on_fileid;
7538         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7539                 entry->ino = entry->fattr->fileid;
7540
7541         entry->d_type = DT_UNKNOWN;
7542         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7543                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7544
7545         entry->cookie = new_cookie;
7546
7547         return 0;
7548 }
7549
7550 /*
7551  * We need to translate between nfs status return values and
7552  * the local errno values which may not be the same.
7553  */
7554 static struct {
7555         int stat;
7556         int errno;
7557 } nfs_errtbl[] = {
7558         { NFS4_OK,              0               },
7559         { NFS4ERR_PERM,         -EPERM          },
7560         { NFS4ERR_NOENT,        -ENOENT         },
7561         { NFS4ERR_IO,           -errno_NFSERR_IO},
7562         { NFS4ERR_NXIO,         -ENXIO          },
7563         { NFS4ERR_ACCESS,       -EACCES         },
7564         { NFS4ERR_EXIST,        -EEXIST         },
7565         { NFS4ERR_XDEV,         -EXDEV          },
7566         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7567         { NFS4ERR_ISDIR,        -EISDIR         },
7568         { NFS4ERR_INVAL,        -EINVAL         },
7569         { NFS4ERR_FBIG,         -EFBIG          },
7570         { NFS4ERR_NOSPC,        -ENOSPC         },
7571         { NFS4ERR_ROFS,         -EROFS          },
7572         { NFS4ERR_MLINK,        -EMLINK         },
7573         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7574         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7575         { NFS4ERR_DQUOT,        -EDQUOT         },
7576         { NFS4ERR_STALE,        -ESTALE         },
7577         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7578         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7579         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7580         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7581         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7582         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7583         { NFS4ERR_LOCKED,       -EAGAIN         },
7584         { NFS4ERR_SYMLINK,      -ELOOP          },
7585         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7586         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7587         { NFS4ERR_NOXATTR,      -ENODATA        },
7588         { NFS4ERR_XATTR2BIG,    -E2BIG          },
7589         { -1,                   -EIO            }
7590 };
7591
7592 /*
7593  * Convert an NFS error code to a local one.
7594  * This one is used jointly by NFSv2 and NFSv3.
7595  */
7596 static int
7597 nfs4_stat_to_errno(int stat)
7598 {
7599         int i;
7600         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7601                 if (nfs_errtbl[i].stat == stat)
7602                         return nfs_errtbl[i].errno;
7603         }
7604         if (stat <= 10000 || stat > 10100) {
7605                 /* The server is looney tunes. */
7606                 return -EREMOTEIO;
7607         }
7608         /* If we cannot translate the error, the recovery routines should
7609          * handle it.
7610          * Note: remaining NFSv4 error codes have values > 10000, so should
7611          * not conflict with native Linux error codes.
7612          */
7613         return -stat;
7614 }
7615
7616 #ifdef CONFIG_NFS_V4_2
7617 #include "nfs42xdr.c"
7618 #endif /* CONFIG_NFS_V4_2 */
7619
7620 #define PROC(proc, argtype, restype)                            \
7621 [NFSPROC4_CLNT_##proc] = {                                      \
7622         .p_proc   = NFSPROC4_COMPOUND,                          \
7623         .p_encode = nfs4_xdr_##argtype,                         \
7624         .p_decode = nfs4_xdr_##restype,                         \
7625         .p_arglen = NFS4_##argtype##_sz,                        \
7626         .p_replen = NFS4_##restype##_sz,                        \
7627         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7628         .p_name   = #proc,                                      \
7629 }
7630
7631 #define STUB(proc)              \
7632 [NFSPROC4_CLNT_##proc] = {      \
7633         .p_name = #proc,        \
7634 }
7635
7636 #if defined(CONFIG_NFS_V4_1)
7637 #define PROC41(proc, argtype, restype)                          \
7638         PROC(proc, argtype, restype)
7639 #else
7640 #define PROC41(proc, argtype, restype)                          \
7641         STUB(proc)
7642 #endif
7643
7644 #if defined(CONFIG_NFS_V4_2)
7645 #define PROC42(proc, argtype, restype)                          \
7646         PROC(proc, argtype, restype)
7647 #else
7648 #define PROC42(proc, argtype, restype)                          \
7649         STUB(proc)
7650 #endif
7651
7652 const struct rpc_procinfo nfs4_procedures[] = {
7653         PROC(READ,              enc_read,               dec_read),
7654         PROC(WRITE,             enc_write,              dec_write),
7655         PROC(COMMIT,            enc_commit,             dec_commit),
7656         PROC(OPEN,              enc_open,               dec_open),
7657         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7658         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7659         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7660         PROC(CLOSE,             enc_close,              dec_close),
7661         PROC(SETATTR,           enc_setattr,            dec_setattr),
7662         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7663         PROC(RENEW,             enc_renew,              dec_renew),
7664         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7665         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7666         PROC(LOCK,              enc_lock,               dec_lock),
7667         PROC(LOCKT,             enc_lockt,              dec_lockt),
7668         PROC(LOCKU,             enc_locku,              dec_locku),
7669         PROC(ACCESS,            enc_access,             dec_access),
7670         PROC(GETATTR,           enc_getattr,            dec_getattr),
7671         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7672         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7673         PROC(REMOVE,            enc_remove,             dec_remove),
7674         PROC(RENAME,            enc_rename,             dec_rename),
7675         PROC(LINK,              enc_link,               dec_link),
7676         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7677         PROC(CREATE,            enc_create,             dec_create),
7678         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7679         PROC(STATFS,            enc_statfs,             dec_statfs),
7680         PROC(READLINK,          enc_readlink,           dec_readlink),
7681         PROC(READDIR,           enc_readdir,            dec_readdir),
7682         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7683         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7684         PROC(GETACL,            enc_getacl,             dec_getacl),
7685         PROC(SETACL,            enc_setacl,             dec_setacl),
7686         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7687         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7688         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7689         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7690         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7691         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7692         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7693         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7694         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7695         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7696         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7697         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7698         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7699         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7700         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7701         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7702         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7703         STUB(GETDEVICELIST),
7704         PROC41(BIND_CONN_TO_SESSION,
7705                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7706         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7707         PROC42(SEEK,            enc_seek,               dec_seek),
7708         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7709         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7710         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7711         PROC42(CLONE,           enc_clone,              dec_clone),
7712         PROC42(COPY,            enc_copy,               dec_copy),
7713         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7714         PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7715         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7716         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7717         PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7718         PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7719         PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7720         PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7721         PROC42(READ_PLUS,       enc_read_plus,          dec_read_plus),
7722 };
7723
7724 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7725 const struct rpc_version nfs_version4 = {
7726         .number                 = 4,
7727         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7728         .procs                  = nfs4_procedures,
7729         .counts                 = nfs_version4_counts,
7730 };