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 open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  88 #define lock_owner_id_maxsz     (1 + 1 + 4)
  89 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  90 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  91 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  92 #define op_encode_hdr_maxsz     (1)
  93 #define op_decode_hdr_maxsz     (2)
  94 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  95 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  96 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  97 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  98 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  99                                 (NFS4_FHSIZE >> 2))
 100 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
 101 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 102 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 103 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 104 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 105                                 ((3+NFS4_FHSIZE) >> 2))
 106 #define nfs4_fattr_bitmap_maxsz 4
 107 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 108 #define nfstime4_maxsz          (3)
 109 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 110 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 111 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 112 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 113 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 114 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 115 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 116 #else
 117 #define nfs4_label_maxsz        0
 118 #endif
 119 /* We support only one layout type per file system */
 120 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 121 /* This is based on getfattr, which uses the most attributes: */
 122 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 123                                 3*nfstime4_maxsz + \
 124                                 nfs4_owner_maxsz + \
 125                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 126                                  decode_mdsthreshold_maxsz))
 127 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 128                                 nfs4_fattr_value_maxsz)
 129 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 130 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 131                                  1 + 2 + 1 + \
 132                                 nfs4_owner_maxsz + \
 133                                 nfs4_group_maxsz + \
 134                                 nfs4_label_maxsz + \
 135                                 1 + nfstime4_maxsz + \
 136                                 1 + nfstime4_maxsz)
 137 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 138 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 139 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 140 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 141 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 142 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 143  * layout types will be returned.
 144  */
 145 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 146                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 147 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 148 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 149 #define encode_setclientid_maxsz \
 150                                 (op_encode_hdr_maxsz + \
 151                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 152                                 /* client name */ \
 153                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 154                                 1 /* sc_prog */ + \
 155                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 156                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 157                                 1) /* sc_cb_ident */
 158 #define decode_setclientid_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                 2 /* clientid */ + \
 161                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 162                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 163                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 164 #define encode_setclientid_confirm_maxsz \
 165                                 (op_encode_hdr_maxsz + \
 166                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 167 #define decode_setclientid_confirm_maxsz \
 168                                 (op_decode_hdr_maxsz)
 169 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 170 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 171 #define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 172 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 173 #define encode_share_access_maxsz \
 174                                 (2)
 175 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 176 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 177 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 178 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 179                                 2 + encode_share_access_maxsz + 2 + \
 180                                 open_owner_id_maxsz + \
 181                                 encode_opentype_maxsz + \
 182                                 encode_claim_null_maxsz)
 183 #define decode_space_limit_maxsz        (3)
 184 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 185 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 186                                 decode_space_limit_maxsz + \
 187                                 decode_ace_maxsz)
 188 #define decode_change_info_maxsz        (5)
 189 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 190                                 decode_stateid_maxsz + \
 191                                 decode_change_info_maxsz + 1 + \
 192                                 nfs4_fattr_bitmap_maxsz + \
 193                                 decode_delegation_maxsz)
 194 #define encode_open_confirm_maxsz \
 195                                 (op_encode_hdr_maxsz + \
 196                                  encode_stateid_maxsz + 1)
 197 #define decode_open_confirm_maxsz \
 198                                 (op_decode_hdr_maxsz + \
 199                                  decode_stateid_maxsz)
 200 #define encode_open_downgrade_maxsz \
 201                                 (op_encode_hdr_maxsz + \
 202                                  encode_stateid_maxsz + 1 + \
 203                                  encode_share_access_maxsz)
 204 #define decode_open_downgrade_maxsz \
 205                                 (op_decode_hdr_maxsz + \
 206                                  decode_stateid_maxsz)
 207 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 208                                  1 + encode_stateid_maxsz)
 209 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 210                                  decode_stateid_maxsz)
 211 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 212                                  encode_stateid_maxsz + \
 213                                  encode_attrs_maxsz)
 214 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 215                                  nfs4_fattr_bitmap_maxsz)
 216 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 217                                  encode_stateid_maxsz + 3)
 218 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 219 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 220                                  2 + encode_verifier_maxsz + 5 + \
 221                                 nfs4_label_maxsz)
 222 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 223                                  decode_verifier_maxsz + 1)
 224 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 225 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1 + 1)
 226 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 227                                  encode_stateid_maxsz + 4)
 228 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 229                                  2 + decode_verifier_maxsz)
 230 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 231 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 232                                  decode_verifier_maxsz)
 233 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 234                                 nfs4_name_maxsz)
 235 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 236                                  decode_change_info_maxsz)
 237 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 238                                 2 * nfs4_name_maxsz)
 239 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 240                                  decode_change_info_maxsz + \
 241                                  decode_change_info_maxsz)
 242 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 243                                 nfs4_name_maxsz)
 244 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 245 #define encode_lockowner_maxsz  (7)
 246 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 247                                  7 + \
 248                                  1 + encode_stateid_maxsz + 1 + \
 249                                  encode_lockowner_maxsz)
 250 #define decode_lock_denied_maxsz \
 251                                 (8 + decode_lockowner_maxsz)
 252 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 253                                  decode_lock_denied_maxsz)
 254 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 255                                 encode_lockowner_maxsz)
 256 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 257                                  decode_lock_denied_maxsz)
 258 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 259                                  encode_stateid_maxsz + \
 260                                  4)
 261 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 262                                  decode_stateid_maxsz)
 263 #define encode_release_lockowner_maxsz \
 264                                 (op_encode_hdr_maxsz + \
 265                                  encode_lockowner_maxsz)
 266 #define decode_release_lockowner_maxsz \
 267                                 (op_decode_hdr_maxsz)
 268 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 269 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 270 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 271                                 1 + nfs4_name_maxsz + \
 272                                 1 + \
 273                                 nfs4_fattr_maxsz)
 274 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 275 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 276                                 1 + 2 + nfs4_name_maxsz + \
 277                                 encode_attrs_maxsz)
 278 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 279                                 decode_change_info_maxsz + \
 280                                 nfs4_fattr_bitmap_maxsz)
 281 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 282 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 283 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 284 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 285 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 286 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 287                                  nfs4_fattr_bitmap_maxsz + 1 + 1)
 288 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 289                                  encode_stateid_maxsz + 3)
 290 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 291 #define encode_fs_locations_maxsz \
 292                                 (encode_getattr_maxsz)
 293 #define decode_fs_locations_maxsz \
 294                                 (1)
 295 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 296 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 297
 298 #if defined(CONFIG_NFS_V4_1)
 299 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 300 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 301                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 302
 303 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 304                                 encode_verifier_maxsz + \
 305                                 1 /* co_ownerid.len */ + \
 306                                 /* eia_clientowner */ \
 307                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 308                                 1 /* flags */ + \
 309                                 1 /* spa_how */ + \
 310                                 /* max is SP4_MACH_CRED (for now) */ + \
 311                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 1 /* implementation id array of size 1 */ + \
 314                                 1 /* nii_domain */ + \
 315                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 316                                 1 /* nii_name */ + \
 317                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 318                                 3 /* nii_date */)
 319 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 320                                 2 /* eir_clientid */ + \
 321                                 1 /* eir_sequenceid */ + \
 322                                 1 /* eir_flags */ + \
 323                                 1 /* spr_how */ + \
 324                                   /* max is SP4_MACH_CRED (for now) */ + \
 325                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 326                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 327                                 2 /* eir_server_owner.so_minor_id */ + \
 328                                 /* eir_server_owner.so_major_id<> */ \
 329                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 330                                 /* eir_server_scope<> */ \
 331                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 332                                 1 /* eir_server_impl_id array length */ + \
 333                                 1 /* nii_domain */ + \
 334                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 335                                 1 /* nii_name */ + \
 336                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 337                                 3 /* nii_date */)
 338 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 339 #define decode_channel_attrs_maxsz  (6 + \
 340                                      1 /* ca_rdma_ird.len */ + \
 341                                      1 /* ca_rdma_ird */)
 342 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 343                                      2 /* csa_clientid */ + \
 344                                      1 /* csa_sequence */ + \
 345                                      1 /* csa_flags */ + \
 346                                      encode_channel_attrs_maxsz + \
 347                                      encode_channel_attrs_maxsz + \
 348                                      1 /* csa_cb_program */ + \
 349                                      1 /* csa_sec_parms.len (1) */ + \
 350                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 351                                      1 /* stamp */ + \
 352                                      1 /* machinename.len */ + \
 353                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 354                                      1 /* uid */ + \
 355                                      1 /* gid */ + \
 356                                      1 /* gids.len (0) */)
 357 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 358                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 359                                      1 /* csr_sequence */ + \
 360                                      1 /* csr_flags */ + \
 361                                      decode_channel_attrs_maxsz + \
 362                                      decode_channel_attrs_maxsz)
 363 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 364                                      /* bctsa_sessid */ \
 365                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 366                                      1 /* bctsa_dir */ + \
 367                                      1 /* bctsa_use_conn_in_rdma_mode */)
 368 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 369                                      /* bctsr_sessid */ \
 370                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 371                                      1 /* bctsr_dir */ + \
 372                                      1 /* bctsr_use_conn_in_rdma_mode */)
 373 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 374 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 375 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 376 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 377 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 378                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 379 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 380                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 381 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 382 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 383 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 384                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 385                                 1 /* layout type */ + \
 386                                 1 /* maxcount */ + \
 387                                 1 /* bitmap size */ + \
 388                                 1 /* notification bitmap length */ + \
 389                                 1 /* notification bitmap, word 0 */)
 390 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 391                                 1 /* layout type */ + \
 392                                 1 /* opaque devaddr4 length */ + \
 393                                   /* devaddr4 payload is read into page */ \
 394                                 1 /* notification bitmap length */ + \
 395                                 1 /* notification bitmap, word 0 */ + \
 396                                 1 /* possible XDR padding */)
 397 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 398                                 encode_stateid_maxsz)
 399 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 400                                 decode_stateid_maxsz + \
 401                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + 1)
 402 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 403                                 2 /* offset */ + \
 404                                 2 /* length */ + \
 405                                 1 /* reclaim */ + \
 406                                 encode_stateid_maxsz + \
 407                                 1 /* new offset (true) */ + \
 408                                 2 /* last byte written */ + \
 409                                 1 /* nt_timechanged (false) */ + \
 410                                 1 /* layoutupdate4 layout type */ + \
 411                                 1 /* layoutupdate4 opaqueue len */)
 412                                   /* the actual content of layoutupdate4 should
 413                                      be allocated by drivers and spliced in
 414                                      using xdr_write_pages */
 415 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 416 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 417                                 encode_stateid_maxsz + \
 418                                 1 + \
 419                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 420 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 421                                 1 + decode_stateid_maxsz)
 422 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 423 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 424 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 425                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 426 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 427 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 428                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 429 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 430 #else /* CONFIG_NFS_V4_1 */
 431 #define encode_sequence_maxsz   0
 432 #define decode_sequence_maxsz   0
 433 #define encode_layoutreturn_maxsz 0
 434 #define decode_layoutreturn_maxsz 0
 435 #define encode_layoutget_maxsz  0
 436 #define decode_layoutget_maxsz  0
 437 #endif /* CONFIG_NFS_V4_1 */
 438
 439 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 440 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 441 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_read_maxsz)
 445 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 446                                 decode_sequence_maxsz + \
 447                                 decode_putfh_maxsz + \
 448                                 decode_read_maxsz)
 449 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 450                                 encode_sequence_maxsz + \
 451                                 encode_putfh_maxsz + \
 452                                 encode_readlink_maxsz)
 453 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 454                                 decode_sequence_maxsz + \
 455                                 decode_putfh_maxsz + \
 456                                 decode_readlink_maxsz)
 457 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 458                                 encode_sequence_maxsz + \
 459                                 encode_putfh_maxsz + \
 460                                 encode_readdir_maxsz)
 461 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 462                                 decode_sequence_maxsz + \
 463                                 decode_putfh_maxsz + \
 464                                 decode_readdir_maxsz)
 465 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 466                                 encode_sequence_maxsz + \
 467                                 encode_putfh_maxsz + \
 468                                 encode_write_maxsz + \
 469                                 encode_getattr_maxsz)
 470 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 471                                 decode_sequence_maxsz + \
 472                                 decode_putfh_maxsz + \
 473                                 decode_write_maxsz + \
 474                                 decode_getattr_maxsz)
 475 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 476                                 encode_sequence_maxsz + \
 477                                 encode_putfh_maxsz + \
 478                                 encode_commit_maxsz)
 479 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 480                                 decode_sequence_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_commit_maxsz)
 483 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 484                                 encode_sequence_maxsz + \
 485                                 encode_putfh_maxsz + \
 486                                 encode_open_maxsz + \
 487                                 encode_access_maxsz + \
 488                                 encode_getfh_maxsz + \
 489                                 encode_getattr_maxsz + \
 490                                 encode_layoutget_maxsz)
 491 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 492                                 decode_sequence_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_open_maxsz + \
 495                                 decode_access_maxsz + \
 496                                 decode_getfh_maxsz + \
 497                                 decode_getattr_maxsz + \
 498                                 decode_layoutget_maxsz)
 499 #define NFS4_enc_open_confirm_sz \
 500                                 (compound_encode_hdr_maxsz + \
 501                                  encode_putfh_maxsz + \
 502                                  encode_open_confirm_maxsz)
 503 #define NFS4_dec_open_confirm_sz \
 504                                 (compound_decode_hdr_maxsz + \
 505                                  decode_putfh_maxsz + \
 506                                  decode_open_confirm_maxsz)
 507 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 508                                         encode_sequence_maxsz + \
 509                                         encode_putfh_maxsz + \
 510                                         encode_open_maxsz + \
 511                                         encode_access_maxsz + \
 512                                         encode_getattr_maxsz + \
 513                                         encode_layoutget_maxsz)
 514 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 515                                         decode_sequence_maxsz + \
 516                                         decode_putfh_maxsz + \
 517                                         decode_open_maxsz + \
 518                                         decode_access_maxsz + \
 519                                         decode_getattr_maxsz + \
 520                                         decode_layoutget_maxsz)
 521 #define NFS4_enc_open_downgrade_sz \
 522                                 (compound_encode_hdr_maxsz + \
 523                                  encode_sequence_maxsz + \
 524                                  encode_putfh_maxsz + \
 525                                  encode_layoutreturn_maxsz + \
 526                                  encode_open_downgrade_maxsz)
 527 #define NFS4_dec_open_downgrade_sz \
 528                                 (compound_decode_hdr_maxsz + \
 529                                  decode_sequence_maxsz + \
 530                                  decode_putfh_maxsz + \
 531                                  decode_layoutreturn_maxsz + \
 532                                  decode_open_downgrade_maxsz)
 533 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 534                                  encode_sequence_maxsz + \
 535                                  encode_putfh_maxsz + \
 536                                  encode_layoutreturn_maxsz + \
 537                                  encode_close_maxsz + \
 538                                  encode_getattr_maxsz)
 539 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 540                                  decode_sequence_maxsz + \
 541                                  decode_putfh_maxsz + \
 542                                  decode_layoutreturn_maxsz + \
 543                                  decode_close_maxsz + \
 544                                  decode_getattr_maxsz)
 545 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 546                                  encode_sequence_maxsz + \
 547                                  encode_putfh_maxsz + \
 548                                  encode_setattr_maxsz + \
 549                                  encode_getattr_maxsz)
 550 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 551                                  decode_sequence_maxsz + \
 552                                  decode_putfh_maxsz + \
 553                                  decode_setattr_maxsz + \
 554                                  decode_getattr_maxsz)
 555 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 556                                 encode_sequence_maxsz + \
 557                                 encode_putfh_maxsz + \
 558                                 encode_fsinfo_maxsz)
 559 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 560                                 decode_sequence_maxsz + \
 561                                 decode_putfh_maxsz + \
 562                                 decode_fsinfo_maxsz)
 563 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 564                                 encode_renew_maxsz)
 565 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 566                                 decode_renew_maxsz)
 567 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 568                                 encode_setclientid_maxsz)
 569 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 570                                 decode_setclientid_maxsz)
 571 #define NFS4_enc_setclientid_confirm_sz \
 572                                 (compound_encode_hdr_maxsz + \
 573                                 encode_setclientid_confirm_maxsz)
 574 #define NFS4_dec_setclientid_confirm_sz \
 575                                 (compound_decode_hdr_maxsz + \
 576                                 decode_setclientid_confirm_maxsz)
 577 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 578                                 encode_sequence_maxsz + \
 579                                 encode_putfh_maxsz + \
 580                                 encode_lock_maxsz)
 581 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 582                                 decode_sequence_maxsz + \
 583                                 decode_putfh_maxsz + \
 584                                 decode_lock_maxsz)
 585 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 586                                 encode_sequence_maxsz + \
 587                                 encode_putfh_maxsz + \
 588                                 encode_lockt_maxsz)
 589 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 590                                  decode_sequence_maxsz + \
 591                                  decode_putfh_maxsz + \
 592                                  decode_lockt_maxsz)
 593 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 594                                 encode_sequence_maxsz + \
 595                                 encode_putfh_maxsz + \
 596                                 encode_locku_maxsz)
 597 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 598                                 decode_sequence_maxsz + \
 599                                 decode_putfh_maxsz + \
 600                                 decode_locku_maxsz)
 601 #define NFS4_enc_release_lockowner_sz \
 602                                 (compound_encode_hdr_maxsz + \
 603                                  encode_lockowner_maxsz)
 604 #define NFS4_dec_release_lockowner_sz \
 605                                 (compound_decode_hdr_maxsz + \
 606                                  decode_lockowner_maxsz)
 607 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_access_maxsz + \
 611                                 encode_getattr_maxsz)
 612 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 613                                 decode_sequence_maxsz + \
 614                                 decode_putfh_maxsz + \
 615                                 decode_access_maxsz + \
 616                                 decode_getattr_maxsz)
 617 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 618                                 encode_sequence_maxsz + \
 619                                 encode_putfh_maxsz + \
 620                                 encode_getattr_maxsz + \
 621                                 encode_renew_maxsz)
 622 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 623                                 decode_sequence_maxsz + \
 624                                 decode_putfh_maxsz + \
 625                                 decode_getattr_maxsz + \
 626                                 decode_renew_maxsz)
 627 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 628                                 encode_sequence_maxsz + \
 629                                 encode_putfh_maxsz + \
 630                                 encode_lookup_maxsz + \
 631                                 encode_getattr_maxsz + \
 632                                 encode_getfh_maxsz)
 633 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_lookup_maxsz + \
 637                                 decode_getattr_maxsz + \
 638                                 decode_getfh_maxsz)
 639 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 640                                 encode_sequence_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_lookupp_maxsz + \
 643                                 encode_getattr_maxsz + \
 644                                 encode_getfh_maxsz)
 645 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 646                                 decode_sequence_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_lookupp_maxsz + \
 649                                 decode_getattr_maxsz + \
 650                                 decode_getfh_maxsz)
 651 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 652                                 encode_sequence_maxsz + \
 653                                 encode_putrootfh_maxsz + \
 654                                 encode_getattr_maxsz + \
 655                                 encode_getfh_maxsz)
 656 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 657                                 decode_sequence_maxsz + \
 658                                 decode_putrootfh_maxsz + \
 659                                 decode_getattr_maxsz + \
 660                                 decode_getfh_maxsz)
 661 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 662                                 encode_sequence_maxsz + \
 663                                 encode_putfh_maxsz + \
 664                                 encode_remove_maxsz)
 665 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 666                                 decode_sequence_maxsz + \
 667                                 decode_putfh_maxsz + \
 668                                 decode_remove_maxsz)
 669 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 670                                 encode_sequence_maxsz + \
 671                                 encode_putfh_maxsz + \
 672                                 encode_savefh_maxsz + \
 673                                 encode_putfh_maxsz + \
 674                                 encode_rename_maxsz)
 675 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_savefh_maxsz + \
 679                                 decode_putfh_maxsz + \
 680                                 decode_rename_maxsz)
 681 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 682                                 encode_sequence_maxsz + \
 683                                 encode_putfh_maxsz + \
 684                                 encode_savefh_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_link_maxsz + \
 687                                 encode_restorefh_maxsz + \
 688                                 encode_getattr_maxsz)
 689 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_savefh_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_link_maxsz + \
 695                                 decode_restorefh_maxsz + \
 696                                 decode_getattr_maxsz)
 697 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_symlink_maxsz + \
 701                                 encode_getattr_maxsz + \
 702                                 encode_getfh_maxsz)
 703 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 704                                 decode_sequence_maxsz + \
 705                                 decode_putfh_maxsz + \
 706                                 decode_symlink_maxsz + \
 707                                 decode_getattr_maxsz + \
 708                                 decode_getfh_maxsz)
 709 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 710                                 encode_sequence_maxsz + \
 711                                 encode_putfh_maxsz + \
 712                                 encode_create_maxsz + \
 713                                 encode_getfh_maxsz + \
 714                                 encode_getattr_maxsz)
 715 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 716                                 decode_sequence_maxsz + \
 717                                 decode_putfh_maxsz + \
 718                                 decode_create_maxsz + \
 719                                 decode_getfh_maxsz + \
 720                                 decode_getattr_maxsz)
 721 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 722                                 encode_sequence_maxsz + \
 723                                 encode_putfh_maxsz + \
 724                                 encode_getattr_maxsz)
 725 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 726                                 decode_sequence_maxsz + \
 727                                 decode_putfh_maxsz + \
 728                                 decode_getattr_maxsz)
 729 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 730                                 encode_sequence_maxsz + \
 731                                 encode_putfh_maxsz + \
 732                                 encode_statfs_maxsz)
 733 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 734                                 decode_sequence_maxsz + \
 735                                 decode_putfh_maxsz + \
 736                                 decode_statfs_maxsz)
 737 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 738                                 encode_sequence_maxsz + \
 739                                 encode_putfh_maxsz + \
 740                                 encode_getattr_maxsz)
 741 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 742                                 decode_sequence_maxsz + \
 743                                 decode_putfh_maxsz + \
 744                                 decode_getattr_maxsz)
 745 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 746                                 encode_sequence_maxsz + \
 747                                 encode_putfh_maxsz + \
 748                                 encode_layoutreturn_maxsz + \
 749                                 encode_delegreturn_maxsz + \
 750                                 encode_getattr_maxsz)
 751 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 752                                 decode_sequence_maxsz + \
 753                                 decode_putfh_maxsz + \
 754                                 decode_layoutreturn_maxsz + \
 755                                 decode_delegreturn_maxsz + \
 756                                 decode_getattr_maxsz)
 757 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 758                                 encode_sequence_maxsz + \
 759                                 encode_putfh_maxsz + \
 760                                 encode_getacl_maxsz)
 761 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 762                                 decode_sequence_maxsz + \
 763                                 decode_putfh_maxsz + \
 764                                 decode_getacl_maxsz)
 765 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 766                                 encode_sequence_maxsz + \
 767                                 encode_putfh_maxsz + \
 768                                 encode_setacl_maxsz)
 769 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 770                                 decode_sequence_maxsz + \
 771                                 decode_putfh_maxsz + \
 772                                 decode_setacl_maxsz)
 773 #define NFS4_enc_fs_locations_sz \
 774                                 (compound_encode_hdr_maxsz + \
 775                                  encode_sequence_maxsz + \
 776                                  encode_putfh_maxsz + \
 777                                  encode_lookup_maxsz + \
 778                                  encode_fs_locations_maxsz + \
 779                                  encode_renew_maxsz)
 780 #define NFS4_dec_fs_locations_sz \
 781                                 (compound_decode_hdr_maxsz + \
 782                                  decode_sequence_maxsz + \
 783                                  decode_putfh_maxsz + \
 784                                  decode_lookup_maxsz + \
 785                                  decode_fs_locations_maxsz + \
 786                                  decode_renew_maxsz)
 787 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 788                                 encode_sequence_maxsz + \
 789                                 encode_putfh_maxsz + \
 790                                 encode_secinfo_maxsz)
 791 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 792                                 decode_sequence_maxsz + \
 793                                 decode_putfh_maxsz + \
 794                                 decode_secinfo_maxsz)
 795 #define NFS4_enc_fsid_present_sz \
 796                                 (compound_encode_hdr_maxsz + \
 797                                  encode_sequence_maxsz + \
 798                                  encode_putfh_maxsz + \
 799                                  encode_getfh_maxsz + \
 800                                  encode_renew_maxsz)
 801 #define NFS4_dec_fsid_present_sz \
 802                                 (compound_decode_hdr_maxsz + \
 803                                  decode_sequence_maxsz + \
 804                                  decode_putfh_maxsz + \
 805                                  decode_getfh_maxsz + \
 806                                  decode_renew_maxsz)
 807 #if defined(CONFIG_NFS_V4_1)
 808 #define NFS4_enc_bind_conn_to_session_sz \
 809                                 (compound_encode_hdr_maxsz + \
 810                                  encode_bind_conn_to_session_maxsz)
 811 #define NFS4_dec_bind_conn_to_session_sz \
 812                                 (compound_decode_hdr_maxsz + \
 813                                  decode_bind_conn_to_session_maxsz)
 814 #define NFS4_enc_exchange_id_sz \
 815                                 (compound_encode_hdr_maxsz + \
 816                                  encode_exchange_id_maxsz)
 817 #define NFS4_dec_exchange_id_sz \
 818                                 (compound_decode_hdr_maxsz + \
 819                                  decode_exchange_id_maxsz)
 820 #define NFS4_enc_create_session_sz \
 821                                 (compound_encode_hdr_maxsz + \
 822                                  encode_create_session_maxsz)
 823 #define NFS4_dec_create_session_sz \
 824                                 (compound_decode_hdr_maxsz + \
 825                                  decode_create_session_maxsz)
 826 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 827                                          encode_destroy_session_maxsz)
 828 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 829                                          decode_destroy_session_maxsz)
 830 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 831                                          encode_destroy_clientid_maxsz)
 832 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 833                                          decode_destroy_clientid_maxsz)
 834 #define NFS4_enc_sequence_sz \
 835                                 (compound_decode_hdr_maxsz + \
 836                                  encode_sequence_maxsz)
 837 #define NFS4_dec_sequence_sz \
 838                                 (compound_decode_hdr_maxsz + \
 839                                  decode_sequence_maxsz)
 840 #endif
 841 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 842                                          encode_sequence_maxsz + \
 843                                          encode_putrootfh_maxsz + \
 844                                          encode_fsinfo_maxsz)
 845 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 846                                          decode_sequence_maxsz + \
 847                                          decode_putrootfh_maxsz + \
 848                                          decode_fsinfo_maxsz)
 849 #if defined(CONFIG_NFS_V4_1)
 850 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 851                                          encode_sequence_maxsz + \
 852                                          encode_reclaim_complete_maxsz)
 853 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 854                                          decode_sequence_maxsz + \
 855                                          decode_reclaim_complete_maxsz)
 856 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 857                                 encode_sequence_maxsz +\
 858                                 encode_getdeviceinfo_maxsz)
 859 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 860                                 decode_sequence_maxsz + \
 861                                 decode_getdeviceinfo_maxsz)
 862 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 863                                 encode_sequence_maxsz + \
 864                                 encode_putfh_maxsz +        \
 865                                 encode_layoutget_maxsz)
 866 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 867                                 decode_sequence_maxsz + \
 868                                 decode_putfh_maxsz +        \
 869                                 decode_layoutget_maxsz)
 870 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 871                                 encode_sequence_maxsz +\
 872                                 encode_putfh_maxsz + \
 873                                 encode_layoutcommit_maxsz + \
 874                                 encode_getattr_maxsz)
 875 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 876                                 decode_sequence_maxsz + \
 877                                 decode_putfh_maxsz + \
 878                                 decode_layoutcommit_maxsz + \
 879                                 decode_getattr_maxsz)
 880 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 881                                 encode_sequence_maxsz + \
 882                                 encode_putfh_maxsz + \
 883                                 encode_layoutreturn_maxsz)
 884 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 885                                 decode_sequence_maxsz + \
 886                                 decode_putfh_maxsz + \
 887                                 decode_layoutreturn_maxsz)
 888 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 889                                         encode_sequence_maxsz + \
 890                                         encode_putrootfh_maxsz +\
 891                                         encode_secinfo_no_name_maxsz)
 892 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 893                                         decode_sequence_maxsz + \
 894                                         decode_putrootfh_maxsz + \
 895                                         decode_secinfo_no_name_maxsz)
 896 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 897                                          encode_sequence_maxsz + \
 898                                          encode_test_stateid_maxsz)
 899 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 900                                          decode_sequence_maxsz + \
 901                                          decode_test_stateid_maxsz)
 902 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 903                                          encode_sequence_maxsz + \
 904                                          encode_free_stateid_maxsz)
 905 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 906                                          decode_sequence_maxsz + \
 907                                          decode_free_stateid_maxsz)
 908
 909 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 910                                       compound_encode_hdr_maxsz +
 911                                       encode_sequence_maxsz +
 912                                       encode_putfh_maxsz +
 913                                       encode_getattr_maxsz) *
 914                                      XDR_UNIT);
 915
 916 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 917                                      compound_decode_hdr_maxsz +
 918                                      decode_sequence_maxsz +
 919                                      decode_putfh_maxsz) *
 920                                     XDR_UNIT);
 921
 922 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 923                                            compound_decode_hdr_maxsz +
 924                                            decode_sequence_maxsz) *
 925                                           XDR_UNIT);
 926 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 927 #endif /* CONFIG_NFS_V4_1 */
 928
 929 static const umode_t nfs_type2fmt[] = {
 930         [NF4BAD] = 0,
 931         [NF4REG] = S_IFREG,
 932         [NF4DIR] = S_IFDIR,
 933         [NF4BLK] = S_IFBLK,
 934         [NF4CHR] = S_IFCHR,
 935         [NF4LNK] = S_IFLNK,
 936         [NF4SOCK] = S_IFSOCK,
 937         [NF4FIFO] = S_IFIFO,
 938         [NF4ATTRDIR] = 0,
 939         [NF4NAMEDATTR] = 0,
 940 };
 941
 942 struct compound_hdr {
 943         int32_t         status;
 944         uint32_t        nops;
 945         __be32 *        nops_p;
 946         uint32_t        taglen;
 947         char *          tag;
 948         uint32_t        replen;         /* expected reply words */
 949         u32             minorversion;
 950 };
 951
 952 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 953 {
 954         __be32 *p = xdr_reserve_space(xdr, nbytes);
 955         BUG_ON(!p);
 956         return p;
 957 }
 958
 959 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 960 {
 961         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 962 }
 963
 964 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 965 {
 966         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 967 }
 968
 969 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 970 {
 971         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 972 }
 973
 974 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 975 {
 976         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 977 }
 978
 979 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 980                 const __u32 *bitmap, size_t len)
 981 {
 982         ssize_t ret;
 983
 984         /* Trim empty words */
 985         while (len > 0 && bitmap[len-1] == 0)
 986                 len--;
 987         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 988         if (WARN_ON_ONCE(ret < 0))
 989                 return ret;
 990         return len;
 991 }
 992
 993 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 994                 __u32 *res, size_t len)
 995 {
 996         size_t i;
 997         __u32 tmp;
 998
 999         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1000                 len--;
1001         for (i = len; i-- > 0;) {
1002                 tmp = bitmap[i] & mask[i];
1003                 res[i] = tmp;
1004         }
1005         return len;
1006 }
1007
1008 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1009                 const struct nfs_seqid *seqid)
1010 {
1011         if (seqid != NULL)
1012                 encode_uint32(xdr, seqid->sequence->counter);
1013         else
1014                 encode_uint32(xdr, 0);
1015 }
1016
1017 static void encode_compound_hdr(struct xdr_stream *xdr,
1018                                 struct rpc_rqst *req,
1019                                 struct compound_hdr *hdr)
1020 {
1021         __be32 *p;
1022
1023         /* initialize running count of expected bytes in reply.
1024          * NOTE: the replied tag SHOULD be the same is the one sent,
1025          * but this is not required as a MUST for the server to do so. */
1026         hdr->replen = 3 + hdr->taglen;
1027
1028         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1029         encode_string(xdr, hdr->taglen, hdr->tag);
1030         p = reserve_space(xdr, 8);
1031         *p++ = cpu_to_be32(hdr->minorversion);
1032         hdr->nops_p = p;
1033         *p = cpu_to_be32(hdr->nops);
1034 }
1035
1036 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1037                 uint32_t replen,
1038                 struct compound_hdr *hdr)
1039 {
1040         encode_uint32(xdr, op);
1041         hdr->nops++;
1042         hdr->replen += replen;
1043 }
1044
1045 static void encode_nops(struct compound_hdr *hdr)
1046 {
1047         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1048         *hdr->nops_p = htonl(hdr->nops);
1049 }
1050
1051 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1052 {
1053         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1054 }
1055
1056 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1057 {
1058         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1059 }
1060
1061 static __be32 *
1062 xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1063 {
1064         p = xdr_encode_hyper(p, t->tv_sec);
1065         *p++ = cpu_to_be32(t->tv_nsec);
1066         return p;
1067 }
1068
1069 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1070                                 const struct nfs4_label *label,
1071                                 const umode_t *umask,
1072                                 const struct nfs_server *server,
1073                                 const uint32_t attrmask[])
1074 {
1075         char owner_name[IDMAP_NAMESZ];
1076         char owner_group[IDMAP_NAMESZ];
1077         int owner_namelen = 0;
1078         int owner_grouplen = 0;
1079         __be32 *p;
1080         uint32_t len = 0;
1081         uint32_t bmval[3] = { 0 };
1082
1083         /*
1084          * We reserve enough space to write the entire attribute buffer at once.
1085          */
1086         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1087                 bmval[0] |= FATTR4_WORD0_SIZE;
1088                 len += 8;
1089         }
1090         if (iap->ia_valid & ATTR_MODE) {
1091                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1092                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1093                         len += 8;
1094                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1095                         bmval[1] |= FATTR4_WORD1_MODE;
1096                         len += 4;
1097                 }
1098         }
1099         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1100                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1101                 if (owner_namelen < 0) {
1102                         dprintk("nfs: couldn't resolve uid %d to string\n",
1103                                         from_kuid(&init_user_ns, iap->ia_uid));
1104                         /* XXX */
1105                         strcpy(owner_name, "nobody");
1106                         owner_namelen = sizeof("nobody") - 1;
1107                         /* goto out; */
1108                 }
1109                 bmval[1] |= FATTR4_WORD1_OWNER;
1110                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1111         }
1112         if ((iap->ia_valid & ATTR_GID) &&
1113            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1114                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1115                 if (owner_grouplen < 0) {
1116                         dprintk("nfs: couldn't resolve gid %d to string\n",
1117                                         from_kgid(&init_user_ns, iap->ia_gid));
1118                         strcpy(owner_group, "nobody");
1119                         owner_grouplen = sizeof("nobody") - 1;
1120                         /* goto out; */
1121                 }
1122                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1123                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1124         }
1125         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1126                 if (iap->ia_valid & ATTR_ATIME_SET) {
1127                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1128                         len += 4 + (nfstime4_maxsz << 2);
1129                 } else if (iap->ia_valid & ATTR_ATIME) {
1130                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1131                         len += 4;
1132                 }
1133         }
1134         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1135                 if (iap->ia_valid & ATTR_MTIME_SET) {
1136                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1137                         len += 4 + (nfstime4_maxsz << 2);
1138                 } else if (iap->ia_valid & ATTR_MTIME) {
1139                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1140                         len += 4;
1141                 }
1142         }
1143
1144         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1145                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1146                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1147         }
1148
1149         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1150         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1151
1152         if (bmval[0] & FATTR4_WORD0_SIZE)
1153                 p = xdr_encode_hyper(p, iap->ia_size);
1154         if (bmval[1] & FATTR4_WORD1_MODE)
1155                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1156         if (bmval[1] & FATTR4_WORD1_OWNER)
1157                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1158         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1159                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1160         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1161                 if (iap->ia_valid & ATTR_ATIME_SET) {
1162                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1163                         p = xdr_encode_nfstime4(p, &iap->ia_atime);
1164                 } else
1165                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1166         }
1167         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1168                 if (iap->ia_valid & ATTR_MTIME_SET) {
1169                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1170                         p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1171                 } else
1172                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1173         }
1174         if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1175                 *p++ = cpu_to_be32(label->lfs);
1176                 *p++ = cpu_to_be32(label->pi);
1177                 *p++ = cpu_to_be32(label->len);
1178                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1179         }
1180         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1181                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1182                 *p++ = cpu_to_be32(*umask);
1183         }
1184
1185 /* out: */
1186 }
1187
1188 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1189 {
1190         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1191         encode_uint32(xdr, access);
1192 }
1193
1194 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1195 {
1196         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1197         encode_nfs4_seqid(xdr, arg->seqid);
1198         encode_nfs4_stateid(xdr, &arg->stateid);
1199 }
1200
1201 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1202 {
1203         __be32 *p;
1204
1205         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1206         p = reserve_space(xdr, 12);
1207         p = xdr_encode_hyper(p, args->offset);
1208         *p = cpu_to_be32(args->count);
1209 }
1210
1211 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1212 {
1213         __be32 *p;
1214
1215         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1216         encode_uint32(xdr, create->ftype);
1217
1218         switch (create->ftype) {
1219         case NF4LNK:
1220                 p = reserve_space(xdr, 4);
1221                 *p = cpu_to_be32(create->u.symlink.len);
1222                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1223                                 create->u.symlink.len);
1224                 xdr->buf->flags |= XDRBUF_WRITE;
1225                 break;
1226
1227         case NF4BLK: case NF4CHR:
1228                 p = reserve_space(xdr, 8);
1229                 *p++ = cpu_to_be32(create->u.device.specdata1);
1230                 *p = cpu_to_be32(create->u.device.specdata2);
1231                 break;
1232
1233         default:
1234                 break;
1235         }
1236
1237         encode_string(xdr, create->name->len, create->name->name);
1238         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1239                         create->server, create->server->attr_bitmask);
1240 }
1241
1242 static void encode_getattr(struct xdr_stream *xdr,
1243                 const __u32 *bitmap, const __u32 *mask, size_t len,
1244                 struct compound_hdr *hdr)
1245 {
1246         __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1247
1248         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1249         if (mask) {
1250                 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1251                         len = ARRAY_SIZE(masked_bitmap);
1252                 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1253                 bitmap = masked_bitmap;
1254         }
1255         xdr_encode_bitmap4(xdr, bitmap, len);
1256 }
1257
1258 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1259 {
1260         encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1261                         ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1262 }
1263
1264 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1265                                  const u32 *open_bitmap,
1266                                  struct compound_hdr *hdr)
1267 {
1268         encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1269 }
1270
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273         encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1274                         ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1275 }
1276
1277 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1278 {
1279         encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1280                         ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1281 }
1282
1283 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1284 {
1285         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1286 }
1287
1288 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1289 {
1290         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1291         encode_string(xdr, name->len, name->name);
1292 }
1293
1294 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1295 {
1296         if (fl->fl_type == F_RDLCK)
1297                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1298         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1299 }
1300
1301 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1302 {
1303         if (fl->fl_end == OFFSET_MAX)
1304                 return ~(uint64_t)0;
1305         return fl->fl_end - fl->fl_start + 1;
1306 }
1307
1308 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1309 {
1310         __be32 *p;
1311
1312         p = reserve_space(xdr, 32);
1313         p = xdr_encode_hyper(p, lowner->clientid);
1314         *p++ = cpu_to_be32(20);
1315         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1316         *p++ = cpu_to_be32(lowner->s_dev);
1317         xdr_encode_hyper(p, lowner->id);
1318 }
1319
1320 /*
1321  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1322  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1323  */
1324 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1325 {
1326         __be32 *p;
1327
1328         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1329         p = reserve_space(xdr, 28);
1330         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1331         *p++ = cpu_to_be32(args->reclaim);
1332         p = xdr_encode_hyper(p, args->fl->fl_start);
1333         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1334         *p = cpu_to_be32(args->new_lock_owner);
1335         if (args->new_lock_owner){
1336                 encode_nfs4_seqid(xdr, args->open_seqid);
1337                 encode_nfs4_stateid(xdr, &args->open_stateid);
1338                 encode_nfs4_seqid(xdr, args->lock_seqid);
1339                 encode_lockowner(xdr, &args->lock_owner);
1340         }
1341         else {
1342                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1343                 encode_nfs4_seqid(xdr, args->lock_seqid);
1344         }
1345 }
1346
1347 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1348 {
1349         __be32 *p;
1350
1351         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1352         p = reserve_space(xdr, 20);
1353         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1354         p = xdr_encode_hyper(p, args->fl->fl_start);
1355         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1356         encode_lockowner(xdr, &args->lock_owner);
1357 }
1358
1359 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1360 {
1361         __be32 *p;
1362
1363         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1364         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1365         encode_nfs4_seqid(xdr, args->seqid);
1366         encode_nfs4_stateid(xdr, &args->stateid);
1367         p = reserve_space(xdr, 16);
1368         p = xdr_encode_hyper(p, args->fl->fl_start);
1369         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1370 }
1371
1372 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1373 {
1374         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1375         encode_lockowner(xdr, lowner);
1376 }
1377
1378 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1379 {
1380         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1381         encode_string(xdr, name->len, name->name);
1382 }
1383
1384 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1385 {
1386         encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1387 }
1388
1389 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1390 {
1391         __be32 *p;
1392
1393         p = reserve_space(xdr, 8);
1394         *p++ = cpu_to_be32(share_access);
1395         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1396 }
1397
1398 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400         __be32 *p;
1401  /*
1402  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1403  * owner 4 = 32
1404  */
1405         encode_nfs4_seqid(xdr, arg->seqid);
1406         encode_share_access(xdr, arg->share_access);
1407         p = reserve_space(xdr, 36);
1408         p = xdr_encode_hyper(p, arg->clientid);
1409         *p++ = cpu_to_be32(24);
1410         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1411         *p++ = cpu_to_be32(arg->server->s_dev);
1412         *p++ = cpu_to_be32(arg->id.uniquifier);
1413         xdr_encode_hyper(p, arg->id.create_time);
1414 }
1415
1416 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1417 {
1418         __be32 *p;
1419
1420         p = reserve_space(xdr, 4);
1421         switch(arg->createmode) {
1422         case NFS4_CREATE_UNCHECKED:
1423                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1424                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1425                                 arg->server, arg->server->attr_bitmask);
1426                 break;
1427         case NFS4_CREATE_GUARDED:
1428                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1429                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1430                                 arg->server, arg->server->attr_bitmask);
1431                 break;
1432         case NFS4_CREATE_EXCLUSIVE:
1433                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1434                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1435                 break;
1436         case NFS4_CREATE_EXCLUSIVE4_1:
1437                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1438                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1439                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1440                                 arg->server, arg->server->exclcreat_bitmask);
1441         }
1442 }
1443
1444 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1445 {
1446         __be32 *p;
1447
1448         p = reserve_space(xdr, 4);
1449         switch (arg->open_flags & O_CREAT) {
1450         case 0:
1451                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1452                 break;
1453         default:
1454                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1455                 encode_createmode(xdr, arg);
1456         }
1457 }
1458
1459 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1460 {
1461         __be32 *p;
1462
1463         p = reserve_space(xdr, 4);
1464         switch (delegation_type) {
1465         case 0:
1466                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1467                 break;
1468         case FMODE_READ:
1469                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1470                 break;
1471         case FMODE_WRITE|FMODE_READ:
1472                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1473                 break;
1474         default:
1475                 BUG();
1476         }
1477 }
1478
1479 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4);
1484         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1485         encode_string(xdr, name->len, name->name);
1486 }
1487
1488 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1489 {
1490         __be32 *p;
1491
1492         p = reserve_space(xdr, 4);
1493         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1494         encode_delegation_type(xdr, type);
1495 }
1496
1497 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1498 {
1499         __be32 *p;
1500
1501         p = reserve_space(xdr, 4);
1502         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1503         encode_nfs4_stateid(xdr, stateid);
1504         encode_string(xdr, name->len, name->name);
1505 }
1506
1507 static inline void encode_claim_fh(struct xdr_stream *xdr)
1508 {
1509         __be32 *p;
1510
1511         p = reserve_space(xdr, 4);
1512         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1513 }
1514
1515 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1516 {
1517         __be32 *p;
1518
1519         p = reserve_space(xdr, 4);
1520         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1521         encode_nfs4_stateid(xdr, stateid);
1522 }
1523
1524 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1525 {
1526         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1527         encode_openhdr(xdr, arg);
1528         encode_opentype(xdr, arg);
1529         switch (arg->claim) {
1530         case NFS4_OPEN_CLAIM_NULL:
1531                 encode_claim_null(xdr, arg->name);
1532                 break;
1533         case NFS4_OPEN_CLAIM_PREVIOUS:
1534                 encode_claim_previous(xdr, arg->u.delegation_type);
1535                 break;
1536         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1537                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1538                 break;
1539         case NFS4_OPEN_CLAIM_FH:
1540                 encode_claim_fh(xdr);
1541                 break;
1542         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1543                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1544                 break;
1545         default:
1546                 BUG();
1547         }
1548 }
1549
1550 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1551 {
1552         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1553         encode_nfs4_stateid(xdr, arg->stateid);
1554         encode_nfs4_seqid(xdr, arg->seqid);
1555 }
1556
1557 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1558 {
1559         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1560         encode_nfs4_stateid(xdr, &arg->stateid);
1561         encode_nfs4_seqid(xdr, arg->seqid);
1562         encode_share_access(xdr, arg->share_access);
1563 }
1564
1565 static void
1566 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1567 {
1568         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1569         encode_string(xdr, fh->size, fh->data);
1570 }
1571
1572 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1573 {
1574         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1575 }
1576
1577 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1578                         struct compound_hdr *hdr)
1579 {
1580         __be32 *p;
1581
1582         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1583         encode_nfs4_stateid(xdr, &args->stateid);
1584
1585         p = reserve_space(xdr, 12);
1586         p = xdr_encode_hyper(p, args->offset);
1587         *p = cpu_to_be32(args->count);
1588 }
1589
1590 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592         uint32_t attrs[3] = {
1593                 FATTR4_WORD0_RDATTR_ERROR,
1594                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1595         };
1596         uint32_t dircount = readdir->count >> 1;
1597         __be32 *p, verf[2];
1598         uint32_t attrlen = 0;
1599         unsigned int i;
1600
1601         if (readdir->plus) {
1602                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1603                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1604                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1605                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1606                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1607                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1608                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1609                 dircount >>= 1;
1610         }
1611         /* Use mounted_on_fileid only if the server supports it */
1612         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1613                 attrs[0] |= FATTR4_WORD0_FILEID;
1614         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1615                 attrs[i] &= readdir->bitmask[i];
1616                 if (attrs[i] != 0)
1617                         attrlen = i+1;
1618         }
1619
1620         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1621         encode_uint64(xdr, readdir->cookie);
1622         encode_nfs4_verifier(xdr, &readdir->verifier);
1623         p = reserve_space(xdr, 12 + (attrlen << 2));
1624         *p++ = cpu_to_be32(dircount);
1625         *p++ = cpu_to_be32(readdir->count);
1626         *p++ = cpu_to_be32(attrlen);
1627         for (i = 0; i < attrlen; i++)
1628                 *p++ = cpu_to_be32(attrs[i]);
1629         memcpy(verf, readdir->verifier.data, sizeof(verf));
1630
1631         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1632                         __func__,
1633                         (unsigned long long)readdir->cookie,
1634                         verf[0], verf[1],
1635                         attrs[0] & readdir->bitmask[0],
1636                         attrs[1] & readdir->bitmask[1],
1637                         attrs[2] & readdir->bitmask[2]);
1638 }
1639
1640 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1641 {
1642         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1643 }
1644
1645 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1646 {
1647         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1648         encode_string(xdr, name->len, name->name);
1649 }
1650
1651 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1652 {
1653         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1654         encode_string(xdr, oldname->len, oldname->name);
1655         encode_string(xdr, newname->len, newname->name);
1656 }
1657
1658 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1659                          struct compound_hdr *hdr)
1660 {
1661         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1662         encode_uint64(xdr, clid);
1663 }
1664
1665 static void
1666 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667 {
1668         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1669 }
1670
1671 static void
1672 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1673                 struct compound_hdr *hdr)
1674 {
1675         __be32 *p;
1676
1677         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1678         encode_nfs4_stateid(xdr, &zero_stateid);
1679         p = reserve_space(xdr, 2*4);
1680         *p++ = cpu_to_be32(1);
1681         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1682         p = reserve_space(xdr, 4);
1683         *p = cpu_to_be32(arg->acl_len);
1684         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1685 }
1686
1687 static void
1688 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1689 {
1690         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1691 }
1692
1693 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1694 {
1695         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1696         encode_nfs4_stateid(xdr, &arg->stateid);
1697         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1698                         server->attr_bitmask);
1699 }
1700
1701 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1702 {
1703         __be32 *p;
1704
1705         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1706         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1707
1708         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1709                         setclientid->sc_clnt->cl_owner_id);
1710         p = reserve_space(xdr, 4);
1711         *p = cpu_to_be32(setclientid->sc_prog);
1712         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1713         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1714         p = reserve_space(xdr, 4);
1715         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1716 }
1717
1718 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1719 {
1720         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1721                         decode_setclientid_confirm_maxsz, hdr);
1722         encode_uint64(xdr, arg->clientid);
1723         encode_nfs4_verifier(xdr, &arg->confirm);
1724 }
1725
1726 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1727                          struct compound_hdr *hdr)
1728 {
1729         __be32 *p;
1730
1731         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1732         encode_nfs4_stateid(xdr, &args->stateid);
1733
1734         p = reserve_space(xdr, 16);
1735         p = xdr_encode_hyper(p, args->offset);
1736         *p++ = cpu_to_be32(args->stable);
1737         *p = cpu_to_be32(args->count);
1738
1739         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1740 }
1741
1742 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1743 {
1744         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1745         encode_nfs4_stateid(xdr, stateid);
1746 }
1747
1748 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1749 {
1750         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1751         encode_string(xdr, name->len, name->name);
1752 }
1753
1754 #if defined(CONFIG_NFS_V4_1)
1755 /* NFSv4.1 operations */
1756 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1757                                    const struct nfs41_bind_conn_to_session_args *args,
1758                                    struct compound_hdr *hdr)
1759 {
1760         __be32 *p;
1761
1762         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1763                 decode_bind_conn_to_session_maxsz, hdr);
1764         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1765         p = xdr_reserve_space(xdr, 8);
1766         *p++ = cpu_to_be32(args->dir);
1767         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1768 }
1769
1770 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1771 {
1772         unsigned int i;
1773         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1774         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1775                 encode_uint32(xdr, op_map->u.words[i]);
1776 }
1777
1778 static void encode_exchange_id(struct xdr_stream *xdr,
1779                                const struct nfs41_exchange_id_args *args,
1780                                struct compound_hdr *hdr)
1781 {
1782         __be32 *p;
1783         char impl_name[IMPL_NAME_LIMIT];
1784         int len = 0;
1785
1786         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1787         encode_nfs4_verifier(xdr, &args->verifier);
1788
1789         encode_string(xdr, strlen(args->client->cl_owner_id),
1790                         args->client->cl_owner_id);
1791
1792         encode_uint32(xdr, args->flags);
1793         encode_uint32(xdr, args->state_protect.how);
1794
1795         switch (args->state_protect.how) {
1796         case SP4_NONE:
1797                 break;
1798         case SP4_MACH_CRED:
1799                 encode_op_map(xdr, &args->state_protect.enforce);
1800                 encode_op_map(xdr, &args->state_protect.allow);
1801                 break;
1802         default:
1803                 WARN_ON_ONCE(1);
1804                 break;
1805         }
1806
1807         if (send_implementation_id &&
1808             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1809             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1810                 <= sizeof(impl_name) + 1)
1811                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1812                                utsname()->sysname, utsname()->release,
1813                                utsname()->version, utsname()->machine);
1814
1815         if (len > 0) {
1816                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1817
1818                 encode_string(xdr,
1819                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1820                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1821                 encode_string(xdr, len, impl_name);
1822                 /* just send zeros for nii_date - the date is in nii_name */
1823                 p = reserve_space(xdr, 12);
1824                 p = xdr_encode_hyper(p, 0);
1825                 *p = cpu_to_be32(0);
1826         } else
1827                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1828 }
1829
1830 static void encode_create_session(struct xdr_stream *xdr,
1831                                   const struct nfs41_create_session_args *args,
1832                                   struct compound_hdr *hdr)
1833 {
1834         __be32 *p;
1835         struct nfs_client *clp = args->client;
1836         struct rpc_clnt *clnt = clp->cl_rpcclient;
1837         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1838         u32 max_resp_sz_cached;
1839
1840         /*
1841          * Assumes OPEN is the biggest non-idempotent compound.
1842          * 2 is the verifier.
1843          */
1844         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1845                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1846
1847         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1848         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1849         p = xdr_encode_hyper(p, args->clientid);
1850         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1851         *p++ = cpu_to_be32(args->flags);                        /*flags */
1852
1853         /* Fore Channel */
1854         *p++ = cpu_to_be32(0);                          /* header padding size */
1855         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1856         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1857         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1858         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1859         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1860         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1861
1862         /* Back Channel */
1863         *p++ = cpu_to_be32(0);                          /* header padding size */
1864         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1865         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1866         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1867         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1868         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1869         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1870
1871         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1872         *p++ = cpu_to_be32(1);
1873         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1874
1875         /* authsys_parms rfc1831 */
1876         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1877         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1878         *p++ = cpu_to_be32(0);                          /* UID */
1879         *p++ = cpu_to_be32(0);                          /* GID */
1880         *p = cpu_to_be32(0);                            /* No more gids */
1881 }
1882
1883 static void encode_destroy_session(struct xdr_stream *xdr,
1884                                    const struct nfs4_session *session,
1885                                    struct compound_hdr *hdr)
1886 {
1887         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1888         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1889 }
1890
1891 static void encode_destroy_clientid(struct xdr_stream *xdr,
1892                                    uint64_t clientid,
1893                                    struct compound_hdr *hdr)
1894 {
1895         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1896         encode_uint64(xdr, clientid);
1897 }
1898
1899 static void encode_reclaim_complete(struct xdr_stream *xdr,
1900                                     const struct nfs41_reclaim_complete_args *args,
1901                                     struct compound_hdr *hdr)
1902 {
1903         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1904         encode_uint32(xdr, args->one_fs);
1905 }
1906 #endif /* CONFIG_NFS_V4_1 */
1907
1908 static void encode_sequence(struct xdr_stream *xdr,
1909                             const struct nfs4_sequence_args *args,
1910                             struct compound_hdr *hdr)
1911 {
1912 #if defined(CONFIG_NFS_V4_1)
1913         struct nfs4_session *session;
1914         struct nfs4_slot_table *tp;
1915         struct nfs4_slot *slot = args->sa_slot;
1916         __be32 *p;
1917
1918         tp = slot->table;
1919         session = tp->session;
1920         if (!session)
1921                 return;
1922
1923         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1924
1925         /*
1926          * Sessionid + seqid + slotid + max slotid + cache_this
1927          */
1928         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1929                 "max_slotid=%d cache_this=%d\n",
1930                 __func__,
1931                 ((u32 *)session->sess_id.data)[0],
1932                 ((u32 *)session->sess_id.data)[1],
1933                 ((u32 *)session->sess_id.data)[2],
1934                 ((u32 *)session->sess_id.data)[3],
1935                 slot->seq_nr, slot->slot_nr,
1936                 tp->highest_used_slotid, args->sa_cache_this);
1937         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1938         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1939         *p++ = cpu_to_be32(slot->seq_nr);
1940         *p++ = cpu_to_be32(slot->slot_nr);
1941         *p++ = cpu_to_be32(tp->highest_used_slotid);
1942         *p = cpu_to_be32(args->sa_cache_this);
1943 #endif /* CONFIG_NFS_V4_1 */
1944 }
1945
1946 #ifdef CONFIG_NFS_V4_1
1947 static void
1948 encode_getdeviceinfo(struct xdr_stream *xdr,
1949                      const struct nfs4_getdeviceinfo_args *args,
1950                      struct compound_hdr *hdr)
1951 {
1952         __be32 *p;
1953
1954         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1955         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1956         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1957                                     NFS4_DEVICEID4_SIZE);
1958         *p++ = cpu_to_be32(args->pdev->layout_type);
1959         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1960
1961         p = reserve_space(xdr, 4 + 4);
1962         *p++ = cpu_to_be32(1);                  /* bitmap length */
1963         *p++ = cpu_to_be32(args->notify_types);
1964 }
1965
1966 static void
1967 encode_layoutget(struct xdr_stream *xdr,
1968                       const struct nfs4_layoutget_args *args,
1969                       struct compound_hdr *hdr)
1970 {
1971         __be32 *p;
1972
1973         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1974         p = reserve_space(xdr, 36);
1975         *p++ = cpu_to_be32(0);     /* Signal layout available */
1976         *p++ = cpu_to_be32(args->type);
1977         *p++ = cpu_to_be32(args->range.iomode);
1978         p = xdr_encode_hyper(p, args->range.offset);
1979         p = xdr_encode_hyper(p, args->range.length);
1980         p = xdr_encode_hyper(p, args->minlength);
1981         encode_nfs4_stateid(xdr, &args->stateid);
1982         encode_uint32(xdr, args->maxcount);
1983
1984         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1985                 __func__,
1986                 args->type,
1987                 args->range.iomode,
1988                 (unsigned long)args->range.offset,
1989                 (unsigned long)args->range.length,
1990                 args->maxcount);
1991 }
1992
1993 static int
1994 encode_layoutcommit(struct xdr_stream *xdr,
1995                     struct inode *inode,
1996                     const struct nfs4_layoutcommit_args *args,
1997                     struct compound_hdr *hdr)
1998 {
1999         __be32 *p;
2000
2001         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2002                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2003
2004         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2005         p = reserve_space(xdr, 20);
2006         /* Only whole file layouts */
2007         p = xdr_encode_hyper(p, 0); /* offset */
2008         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2009         *p = cpu_to_be32(0); /* reclaim */
2010         encode_nfs4_stateid(xdr, &args->stateid);
2011         if (args->lastbytewritten != U64_MAX) {
2012                 p = reserve_space(xdr, 20);
2013                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2014                 p = xdr_encode_hyper(p, args->lastbytewritten);
2015         } else {
2016                 p = reserve_space(xdr, 12);
2017                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2018         }
2019         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2020         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2021
2022         encode_uint32(xdr, args->layoutupdate_len);
2023         if (args->layoutupdate_pages)
2024                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025                                 args->layoutupdate_len);
2026
2027         return 0;
2028 }
2029
2030 static void
2031 encode_layoutreturn(struct xdr_stream *xdr,
2032                     const struct nfs4_layoutreturn_args *args,
2033                     struct compound_hdr *hdr)
2034 {
2035         __be32 *p;
2036
2037         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2038         p = reserve_space(xdr, 16);
2039         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2040         *p++ = cpu_to_be32(args->layout_type);
2041         *p++ = cpu_to_be32(args->range.iomode);
2042         *p = cpu_to_be32(RETURN_FILE);
2043         p = reserve_space(xdr, 16);
2044         p = xdr_encode_hyper(p, args->range.offset);
2045         p = xdr_encode_hyper(p, args->range.length);
2046         spin_lock(&args->inode->i_lock);
2047         encode_nfs4_stateid(xdr, &args->stateid);
2048         spin_unlock(&args->inode->i_lock);
2049         if (args->ld_private->ops && args->ld_private->ops->encode)
2050                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2051         else
2052                 encode_uint32(xdr, 0);
2053 }
2054
2055 static int
2056 encode_secinfo_no_name(struct xdr_stream *xdr,
2057                        const struct nfs41_secinfo_no_name_args *args,
2058                        struct compound_hdr *hdr)
2059 {
2060         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2061         encode_uint32(xdr, args->style);
2062         return 0;
2063 }
2064
2065 static void encode_test_stateid(struct xdr_stream *xdr,
2066                                 const struct nfs41_test_stateid_args *args,
2067                                 struct compound_hdr *hdr)
2068 {
2069         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2070         encode_uint32(xdr, 1);
2071         encode_nfs4_stateid(xdr, args->stateid);
2072 }
2073
2074 static void encode_free_stateid(struct xdr_stream *xdr,
2075                                 const struct nfs41_free_stateid_args *args,
2076                                 struct compound_hdr *hdr)
2077 {
2078         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2079         encode_nfs4_stateid(xdr, &args->stateid);
2080 }
2081 #else
2082 static inline void
2083 encode_layoutreturn(struct xdr_stream *xdr,
2084                     const struct nfs4_layoutreturn_args *args,
2085                     struct compound_hdr *hdr)
2086 {
2087 }
2088
2089 static void
2090 encode_layoutget(struct xdr_stream *xdr,
2091                       const struct nfs4_layoutget_args *args,
2092                       struct compound_hdr *hdr)
2093 {
2094 }
2095 #endif /* CONFIG_NFS_V4_1 */
2096
2097 /*
2098  * END OF "GENERIC" ENCODE ROUTINES.
2099  */
2100
2101 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2102 {
2103 #if defined(CONFIG_NFS_V4_1)
2104         struct nfs4_session *session = args->sa_slot->table->session;
2105         if (session)
2106                 return session->clp->cl_mvops->minor_version;
2107 #endif /* CONFIG_NFS_V4_1 */
2108         return 0;
2109 }
2110
2111 /*
2112  * Encode an ACCESS request
2113  */
2114 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2115                                 const void *data)
2116 {
2117         const struct nfs4_accessargs *args = data;
2118         struct compound_hdr hdr = {
2119                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2120         };
2121
2122         encode_compound_hdr(xdr, req, &hdr);
2123         encode_sequence(xdr, &args->seq_args, &hdr);
2124         encode_putfh(xdr, args->fh, &hdr);
2125         encode_access(xdr, args->access, &hdr);
2126         if (args->bitmask)
2127                 encode_getfattr(xdr, args->bitmask, &hdr);
2128         encode_nops(&hdr);
2129 }
2130
2131 /*
2132  * Encode LOOKUP request
2133  */
2134 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2135                                 const void *data)
2136 {
2137         const struct nfs4_lookup_arg *args = data;
2138         struct compound_hdr hdr = {
2139                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140         };
2141
2142         encode_compound_hdr(xdr, req, &hdr);
2143         encode_sequence(xdr, &args->seq_args, &hdr);
2144         encode_putfh(xdr, args->dir_fh, &hdr);
2145         encode_lookup(xdr, args->name, &hdr);
2146         encode_getfh(xdr, &hdr);
2147         encode_getfattr(xdr, args->bitmask, &hdr);
2148         encode_nops(&hdr);
2149 }
2150
2151 /*
2152  * Encode LOOKUPP request
2153  */
2154 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2155                 const void *data)
2156 {
2157         const struct nfs4_lookupp_arg *args = data;
2158         struct compound_hdr hdr = {
2159                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2160         };
2161
2162         encode_compound_hdr(xdr, req, &hdr);
2163         encode_sequence(xdr, &args->seq_args, &hdr);
2164         encode_putfh(xdr, args->fh, &hdr);
2165         encode_lookupp(xdr, &hdr);
2166         encode_getfh(xdr, &hdr);
2167         encode_getfattr(xdr, args->bitmask, &hdr);
2168         encode_nops(&hdr);
2169 }
2170
2171 /*
2172  * Encode LOOKUP_ROOT request
2173  */
2174 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2175                                      struct xdr_stream *xdr,
2176                                      const void *data)
2177 {
2178         const struct nfs4_lookup_root_arg *args = data;
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         encode_compound_hdr(xdr, req, &hdr);
2184         encode_sequence(xdr, &args->seq_args, &hdr);
2185         encode_putrootfh(xdr, &hdr);
2186         encode_getfh(xdr, &hdr);
2187         encode_getfattr(xdr, args->bitmask, &hdr);
2188         encode_nops(&hdr);
2189 }
2190
2191 /*
2192  * Encode REMOVE request
2193  */
2194 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2195                                 const void *data)
2196 {
2197         const struct nfs_removeargs *args = data;
2198         struct compound_hdr hdr = {
2199                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2200         };
2201
2202         encode_compound_hdr(xdr, req, &hdr);
2203         encode_sequence(xdr, &args->seq_args, &hdr);
2204         encode_putfh(xdr, args->fh, &hdr);
2205         encode_remove(xdr, &args->name, &hdr);
2206         encode_nops(&hdr);
2207 }
2208
2209 /*
2210  * Encode RENAME request
2211  */
2212 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2213                                 const void *data)
2214 {
2215         const struct nfs_renameargs *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_putfh(xdr, args->old_dir, &hdr);
2223         encode_savefh(xdr, &hdr);
2224         encode_putfh(xdr, args->new_dir, &hdr);
2225         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2226         encode_nops(&hdr);
2227 }
2228
2229 /*
2230  * Encode LINK request
2231  */
2232 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2233                               const void *data)
2234 {
2235         const struct nfs4_link_arg *args = data;
2236         struct compound_hdr hdr = {
2237                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238         };
2239
2240         encode_compound_hdr(xdr, req, &hdr);
2241         encode_sequence(xdr, &args->seq_args, &hdr);
2242         encode_putfh(xdr, args->fh, &hdr);
2243         encode_savefh(xdr, &hdr);
2244         encode_putfh(xdr, args->dir_fh, &hdr);
2245         encode_link(xdr, args->name, &hdr);
2246         encode_restorefh(xdr, &hdr);
2247         encode_getfattr(xdr, args->bitmask, &hdr);
2248         encode_nops(&hdr);
2249 }
2250
2251 /*
2252  * Encode CREATE request
2253  */
2254 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2255                                 const void *data)
2256 {
2257         const struct nfs4_create_arg *args = data;
2258         struct compound_hdr hdr = {
2259                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260         };
2261
2262         encode_compound_hdr(xdr, req, &hdr);
2263         encode_sequence(xdr, &args->seq_args, &hdr);
2264         encode_putfh(xdr, args->dir_fh, &hdr);
2265         encode_create(xdr, args, &hdr);
2266         encode_getfh(xdr, &hdr);
2267         encode_getfattr(xdr, args->bitmask, &hdr);
2268         encode_nops(&hdr);
2269 }
2270
2271 /*
2272  * Encode SYMLINK request
2273  */
2274 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2275                                  const void *data)
2276 {
2277         const struct nfs4_create_arg *args = data;
2278
2279         nfs4_xdr_enc_create(req, xdr, args);
2280 }
2281
2282 /*
2283  * Encode GETATTR request
2284  */
2285 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2286                                  const void *data)
2287 {
2288         const struct nfs4_getattr_arg *args = data;
2289         struct compound_hdr hdr = {
2290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291         };
2292
2293         encode_compound_hdr(xdr, req, &hdr);
2294         encode_sequence(xdr, &args->seq_args, &hdr);
2295         encode_putfh(xdr, args->fh, &hdr);
2296         encode_getfattr(xdr, args->bitmask, &hdr);
2297         encode_nops(&hdr);
2298 }
2299
2300 /*
2301  * Encode a CLOSE request
2302  */
2303 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2304                                const void *data)
2305 {
2306         const struct nfs_closeargs *args = data;
2307         struct compound_hdr hdr = {
2308                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309         };
2310
2311         encode_compound_hdr(xdr, req, &hdr);
2312         encode_sequence(xdr, &args->seq_args, &hdr);
2313         encode_putfh(xdr, args->fh, &hdr);
2314         if (args->lr_args)
2315                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2316         if (args->bitmask != NULL)
2317                 encode_getfattr(xdr, args->bitmask, &hdr);
2318         encode_close(xdr, args, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode an OPEN request
2324  */
2325 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2326                               const void *data)
2327 {
2328         const struct nfs_openargs *args = data;
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         encode_compound_hdr(xdr, req, &hdr);
2334         encode_sequence(xdr, &args->seq_args, &hdr);
2335         encode_putfh(xdr, args->fh, &hdr);
2336         encode_open(xdr, args, &hdr);
2337         encode_getfh(xdr, &hdr);
2338         if (args->access)
2339                 encode_access(xdr, args->access, &hdr);
2340         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2341         if (args->lg_args) {
2342                 encode_layoutget(xdr, args->lg_args, &hdr);
2343                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2344                                         args->lg_args->layout.pglen,
2345                                         hdr.replen);
2346         }
2347         encode_nops(&hdr);
2348 }
2349
2350 /*
2351  * Encode an OPEN_CONFIRM request
2352  */
2353 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2354                                       struct xdr_stream *xdr,
2355                                       const void *data)
2356 {
2357         const struct nfs_open_confirmargs *args = data;
2358         struct compound_hdr hdr = {
2359                 .nops   = 0,
2360         };
2361
2362         encode_compound_hdr(xdr, req, &hdr);
2363         encode_putfh(xdr, args->fh, &hdr);
2364         encode_open_confirm(xdr, args, &hdr);
2365         encode_nops(&hdr);
2366 }
2367
2368 /*
2369  * Encode an OPEN request with no attributes.
2370  */
2371 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2372                                      struct xdr_stream *xdr,
2373                                      const void *data)
2374 {
2375         const struct nfs_openargs *args = data;
2376         struct compound_hdr hdr = {
2377                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2378         };
2379
2380         encode_compound_hdr(xdr, req, &hdr);
2381         encode_sequence(xdr, &args->seq_args, &hdr);
2382         encode_putfh(xdr, args->fh, &hdr);
2383         encode_open(xdr, args, &hdr);
2384         if (args->access)
2385                 encode_access(xdr, args->access, &hdr);
2386         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2387         if (args->lg_args) {
2388                 encode_layoutget(xdr, args->lg_args, &hdr);
2389                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2390                                         args->lg_args->layout.pglen,
2391                                         hdr.replen);
2392         }
2393         encode_nops(&hdr);
2394 }
2395
2396 /*
2397  * Encode an OPEN_DOWNGRADE request
2398  */
2399 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2400                                         struct xdr_stream *xdr,
2401                                         const void *data)
2402 {
2403         const struct nfs_closeargs *args = data;
2404         struct compound_hdr hdr = {
2405                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2406         };
2407
2408         encode_compound_hdr(xdr, req, &hdr);
2409         encode_sequence(xdr, &args->seq_args, &hdr);
2410         encode_putfh(xdr, args->fh, &hdr);
2411         if (args->lr_args)
2412                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2413         encode_open_downgrade(xdr, args, &hdr);
2414         encode_nops(&hdr);
2415 }
2416
2417 /*
2418  * Encode a LOCK request
2419  */
2420 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2421                               const void *data)
2422 {
2423         const struct nfs_lock_args *args = data;
2424         struct compound_hdr hdr = {
2425                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2426         };
2427
2428         encode_compound_hdr(xdr, req, &hdr);
2429         encode_sequence(xdr, &args->seq_args, &hdr);
2430         encode_putfh(xdr, args->fh, &hdr);
2431         encode_lock(xdr, args, &hdr);
2432         encode_nops(&hdr);
2433 }
2434
2435 /*
2436  * Encode a LOCKT request
2437  */
2438 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2439                                const void *data)
2440 {
2441         const struct nfs_lockt_args *args = data;
2442         struct compound_hdr hdr = {
2443                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444         };
2445
2446         encode_compound_hdr(xdr, req, &hdr);
2447         encode_sequence(xdr, &args->seq_args, &hdr);
2448         encode_putfh(xdr, args->fh, &hdr);
2449         encode_lockt(xdr, args, &hdr);
2450         encode_nops(&hdr);
2451 }
2452
2453 /*
2454  * Encode a LOCKU request
2455  */
2456 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2457                                const void *data)
2458 {
2459         const struct nfs_locku_args *args = data;
2460         struct compound_hdr hdr = {
2461                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462         };
2463
2464         encode_compound_hdr(xdr, req, &hdr);
2465         encode_sequence(xdr, &args->seq_args, &hdr);
2466         encode_putfh(xdr, args->fh, &hdr);
2467         encode_locku(xdr, args, &hdr);
2468         encode_nops(&hdr);
2469 }
2470
2471 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2472                                            struct xdr_stream *xdr,
2473                                            const void *data)
2474 {
2475         const struct nfs_release_lockowner_args *args = data;
2476         struct compound_hdr hdr = {
2477                 .minorversion = 0,
2478         };
2479
2480         encode_compound_hdr(xdr, req, &hdr);
2481         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2482         encode_nops(&hdr);
2483 }
2484
2485 /*
2486  * Encode a READLINK request
2487  */
2488 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2489                                   const void *data)
2490 {
2491         const struct nfs4_readlink *args = data;
2492         struct compound_hdr hdr = {
2493                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2494         };
2495
2496         encode_compound_hdr(xdr, req, &hdr);
2497         encode_sequence(xdr, &args->seq_args, &hdr);
2498         encode_putfh(xdr, args->fh, &hdr);
2499         encode_readlink(xdr, args, req, &hdr);
2500
2501         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2502                                 args->pglen, hdr.replen);
2503         encode_nops(&hdr);
2504 }
2505
2506 /*
2507  * Encode a READDIR request
2508  */
2509 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2510                                  const void *data)
2511 {
2512         const struct nfs4_readdir_arg *args = data;
2513         struct compound_hdr hdr = {
2514                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2515         };
2516
2517         encode_compound_hdr(xdr, req, &hdr);
2518         encode_sequence(xdr, &args->seq_args, &hdr);
2519         encode_putfh(xdr, args->fh, &hdr);
2520         encode_readdir(xdr, args, req, &hdr);
2521
2522         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2523                                 args->count, hdr.replen);
2524         encode_nops(&hdr);
2525 }
2526
2527 /*
2528  * Encode a READ request
2529  */
2530 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2531                               const void *data)
2532 {
2533         const struct nfs_pgio_args *args = data;
2534         struct compound_hdr hdr = {
2535                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2536         };
2537
2538         encode_compound_hdr(xdr, req, &hdr);
2539         encode_sequence(xdr, &args->seq_args, &hdr);
2540         encode_putfh(xdr, args->fh, &hdr);
2541         encode_read(xdr, args, &hdr);
2542
2543         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2544                                 args->count, hdr.replen);
2545         req->rq_rcv_buf.flags |= XDRBUF_READ;
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  * Encode an SETATTR request
2551  */
2552 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2553                                  const void *data)
2554 {
2555         const struct nfs_setattrargs *args = data;
2556         struct compound_hdr hdr = {
2557                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558         };
2559
2560         encode_compound_hdr(xdr, req, &hdr);
2561         encode_sequence(xdr, &args->seq_args, &hdr);
2562         encode_putfh(xdr, args->fh, &hdr);
2563         encode_setattr(xdr, args, args->server, &hdr);
2564         encode_getfattr(xdr, args->bitmask, &hdr);
2565         encode_nops(&hdr);
2566 }
2567
2568 /*
2569  * Encode a GETACL request
2570  */
2571 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2572                                 const void *data)
2573 {
2574         const struct nfs_getaclargs *args = data;
2575         struct compound_hdr hdr = {
2576                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577         };
2578         const __u32 nfs4_acl_bitmap[1] = {
2579                 [0] = FATTR4_WORD0_ACL,
2580         };
2581         uint32_t replen;
2582
2583         encode_compound_hdr(xdr, req, &hdr);
2584         encode_sequence(xdr, &args->seq_args, &hdr);
2585         encode_putfh(xdr, args->fh, &hdr);
2586         replen = hdr.replen + op_decode_hdr_maxsz;
2587         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2588                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2589
2590         rpc_prepare_reply_pages(req, args->acl_pages, 0,
2591                                 args->acl_len, replen + 1);
2592         encode_nops(&hdr);
2593 }
2594
2595 /*
2596  * Encode a WRITE request
2597  */
2598 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2599                                const void *data)
2600 {
2601         const struct nfs_pgio_args *args = data;
2602         struct compound_hdr hdr = {
2603                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2604         };
2605
2606         encode_compound_hdr(xdr, req, &hdr);
2607         encode_sequence(xdr, &args->seq_args, &hdr);
2608         encode_putfh(xdr, args->fh, &hdr);
2609         encode_write(xdr, args, &hdr);
2610         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2611         if (args->bitmask)
2612                 encode_getfattr(xdr, args->bitmask, &hdr);
2613         encode_nops(&hdr);
2614 }
2615
2616 /*
2617  *  a COMMIT request
2618  */
2619 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2620                                 const void *data)
2621 {
2622         const struct nfs_commitargs *args = data;
2623         struct compound_hdr hdr = {
2624                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2625         };
2626
2627         encode_compound_hdr(xdr, req, &hdr);
2628         encode_sequence(xdr, &args->seq_args, &hdr);
2629         encode_putfh(xdr, args->fh, &hdr);
2630         encode_commit(xdr, args, &hdr);
2631         encode_nops(&hdr);
2632 }
2633
2634 /*
2635  * FSINFO request
2636  */
2637 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2638                                 const void *data)
2639 {
2640         const struct nfs4_fsinfo_arg *args = data;
2641         struct compound_hdr hdr = {
2642                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643         };
2644
2645         encode_compound_hdr(xdr, req, &hdr);
2646         encode_sequence(xdr, &args->seq_args, &hdr);
2647         encode_putfh(xdr, args->fh, &hdr);
2648         encode_fsinfo(xdr, args->bitmask, &hdr);
2649         encode_nops(&hdr);
2650 }
2651
2652 /*
2653  * a PATHCONF request
2654  */
2655 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2656                                   const void *data)
2657 {
2658         const struct nfs4_pathconf_arg *args = data;
2659         struct compound_hdr hdr = {
2660                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661         };
2662
2663         encode_compound_hdr(xdr, req, &hdr);
2664         encode_sequence(xdr, &args->seq_args, &hdr);
2665         encode_putfh(xdr, args->fh, &hdr);
2666         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2667                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2668         encode_nops(&hdr);
2669 }
2670
2671 /*
2672  * a STATFS request
2673  */
2674 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2675                                 const void *data)
2676 {
2677         const struct nfs4_statfs_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_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2686                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2687         encode_nops(&hdr);
2688 }
2689
2690 /*
2691  * GETATTR_BITMAP request
2692  */
2693 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2694                                      struct xdr_stream *xdr,
2695                                      const void *data)
2696 {
2697         const struct nfs4_server_caps_arg *args = data;
2698         const u32 *bitmask = args->bitmask;
2699         struct compound_hdr hdr = {
2700                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701         };
2702
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_sequence(xdr, &args->seq_args, &hdr);
2705         encode_putfh(xdr, args->fhandle, &hdr);
2706         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2707         encode_nops(&hdr);
2708 }
2709
2710 /*
2711  * a RENEW request
2712  */
2713 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2714                                const void *data)
2715
2716 {
2717         const struct nfs_client *clp = data;
2718         struct compound_hdr hdr = {
2719                 .nops   = 0,
2720         };
2721
2722         encode_compound_hdr(xdr, req, &hdr);
2723         encode_renew(xdr, clp->cl_clientid, &hdr);
2724         encode_nops(&hdr);
2725 }
2726
2727 /*
2728  * a SETCLIENTID request
2729  */
2730 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2731                                      struct xdr_stream *xdr,
2732                                      const void *data)
2733 {
2734         const struct nfs4_setclientid *sc = data;
2735         struct compound_hdr hdr = {
2736                 .nops   = 0,
2737         };
2738
2739         encode_compound_hdr(xdr, req, &hdr);
2740         encode_setclientid(xdr, sc, &hdr);
2741         encode_nops(&hdr);
2742 }
2743
2744 /*
2745  * a SETCLIENTID_CONFIRM request
2746  */
2747 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2748                                              struct xdr_stream *xdr,
2749                                              const void *data)
2750 {
2751         const struct nfs4_setclientid_res *arg = data;
2752         struct compound_hdr hdr = {
2753                 .nops   = 0,
2754         };
2755
2756         encode_compound_hdr(xdr, req, &hdr);
2757         encode_setclientid_confirm(xdr, arg, &hdr);
2758         encode_nops(&hdr);
2759 }
2760
2761 /*
2762  * DELEGRETURN request
2763  */
2764 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2765                                      struct xdr_stream *xdr,
2766                                      const void *data)
2767 {
2768         const struct nfs4_delegreturnargs *args = data;
2769         struct compound_hdr hdr = {
2770                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2771         };
2772
2773         encode_compound_hdr(xdr, req, &hdr);
2774         encode_sequence(xdr, &args->seq_args, &hdr);
2775         encode_putfh(xdr, args->fhandle, &hdr);
2776         if (args->lr_args)
2777                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2778         if (args->bitmask)
2779                 encode_getfattr(xdr, args->bitmask, &hdr);
2780         encode_delegreturn(xdr, args->stateid, &hdr);
2781         encode_nops(&hdr);
2782 }
2783
2784 /*
2785  * Encode FS_LOCATIONS request
2786  */
2787 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2788                                       struct xdr_stream *xdr,
2789                                       const void *data)
2790 {
2791         const struct nfs4_fs_locations_arg *args = data;
2792         struct compound_hdr hdr = {
2793                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2794         };
2795         uint32_t replen;
2796
2797         encode_compound_hdr(xdr, req, &hdr);
2798         encode_sequence(xdr, &args->seq_args, &hdr);
2799         if (args->migration) {
2800                 encode_putfh(xdr, args->fh, &hdr);
2801                 replen = hdr.replen;
2802                 encode_fs_locations(xdr, args->bitmask, &hdr);
2803                 if (args->renew)
2804                         encode_renew(xdr, args->clientid, &hdr);
2805         } else {
2806                 encode_putfh(xdr, args->dir_fh, &hdr);
2807                 encode_lookup(xdr, args->name, &hdr);
2808                 replen = hdr.replen;
2809                 encode_fs_locations(xdr, args->bitmask, &hdr);
2810         }
2811
2812         rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2813                                 PAGE_SIZE, replen + 1);
2814         encode_nops(&hdr);
2815 }
2816
2817 /*
2818  * Encode SECINFO request
2819  */
2820 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2821                                 struct xdr_stream *xdr,
2822                                 const void *data)
2823 {
2824         const struct nfs4_secinfo_arg *args = data;
2825         struct compound_hdr hdr = {
2826                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2827         };
2828
2829         encode_compound_hdr(xdr, req, &hdr);
2830         encode_sequence(xdr, &args->seq_args, &hdr);
2831         encode_putfh(xdr, args->dir_fh, &hdr);
2832         encode_secinfo(xdr, args->name, &hdr);
2833         encode_nops(&hdr);
2834 }
2835
2836 /*
2837  * Encode FSID_PRESENT request
2838  */
2839 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2840                                       struct xdr_stream *xdr,
2841                                       const void *data)
2842 {
2843         const struct nfs4_fsid_present_arg *args = data;
2844         struct compound_hdr hdr = {
2845                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2846         };
2847
2848         encode_compound_hdr(xdr, req, &hdr);
2849         encode_sequence(xdr, &args->seq_args, &hdr);
2850         encode_putfh(xdr, args->fh, &hdr);
2851         encode_getfh(xdr, &hdr);
2852         if (args->renew)
2853                 encode_renew(xdr, args->clientid, &hdr);
2854         encode_nops(&hdr);
2855 }
2856
2857 #if defined(CONFIG_NFS_V4_1)
2858 /*
2859  * BIND_CONN_TO_SESSION request
2860  */
2861 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2862                                 struct xdr_stream *xdr,
2863                                 const void *data)
2864 {
2865         const struct nfs41_bind_conn_to_session_args *args = data;
2866         struct compound_hdr hdr = {
2867                 .minorversion = args->client->cl_mvops->minor_version,
2868         };
2869
2870         encode_compound_hdr(xdr, req, &hdr);
2871         encode_bind_conn_to_session(xdr, args, &hdr);
2872         encode_nops(&hdr);
2873 }
2874
2875 /*
2876  * EXCHANGE_ID request
2877  */
2878 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2879                                      struct xdr_stream *xdr,
2880                                      const void *data)
2881 {
2882         const struct nfs41_exchange_id_args *args = data;
2883         struct compound_hdr hdr = {
2884                 .minorversion = args->client->cl_mvops->minor_version,
2885         };
2886
2887         encode_compound_hdr(xdr, req, &hdr);
2888         encode_exchange_id(xdr, args, &hdr);
2889         encode_nops(&hdr);
2890 }
2891
2892 /*
2893  * a CREATE_SESSION request
2894  */
2895 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2896                                         struct xdr_stream *xdr,
2897                                         const void *data)
2898 {
2899         const struct nfs41_create_session_args *args = data;
2900         struct compound_hdr hdr = {
2901                 .minorversion = args->client->cl_mvops->minor_version,
2902         };
2903
2904         encode_compound_hdr(xdr, req, &hdr);
2905         encode_create_session(xdr, args, &hdr);
2906         encode_nops(&hdr);
2907 }
2908
2909 /*
2910  * a DESTROY_SESSION request
2911  */
2912 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2913                                          struct xdr_stream *xdr,
2914                                          const void *data)
2915 {
2916         const struct nfs4_session *session = data;
2917         struct compound_hdr hdr = {
2918                 .minorversion = session->clp->cl_mvops->minor_version,
2919         };
2920
2921         encode_compound_hdr(xdr, req, &hdr);
2922         encode_destroy_session(xdr, session, &hdr);
2923         encode_nops(&hdr);
2924 }
2925
2926 /*
2927  * a DESTROY_CLIENTID request
2928  */
2929 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2930                                          struct xdr_stream *xdr,
2931                                          const void *data)
2932 {
2933         const struct nfs_client *clp = data;
2934         struct compound_hdr hdr = {
2935                 .minorversion = clp->cl_mvops->minor_version,
2936         };
2937
2938         encode_compound_hdr(xdr, req, &hdr);
2939         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2940         encode_nops(&hdr);
2941 }
2942
2943 /*
2944  * a SEQUENCE request
2945  */
2946 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2947                                   const void *data)
2948 {
2949         const struct nfs4_sequence_args *args = data;
2950         struct compound_hdr hdr = {
2951                 .minorversion = nfs4_xdr_minorversion(args),
2952         };
2953
2954         encode_compound_hdr(xdr, req, &hdr);
2955         encode_sequence(xdr, args, &hdr);
2956         encode_nops(&hdr);
2957 }
2958
2959 #endif
2960
2961 /*
2962  * a GET_LEASE_TIME request
2963  */
2964 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2965                                         struct xdr_stream *xdr,
2966                                         const void *data)
2967 {
2968         const struct nfs4_get_lease_time_args *args = data;
2969         struct compound_hdr hdr = {
2970                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2971         };
2972         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2973
2974         encode_compound_hdr(xdr, req, &hdr);
2975         encode_sequence(xdr, &args->la_seq_args, &hdr);
2976         encode_putrootfh(xdr, &hdr);
2977         encode_fsinfo(xdr, lease_bitmap, &hdr);
2978         encode_nops(&hdr);
2979 }
2980
2981 #ifdef CONFIG_NFS_V4_1
2982
2983 /*
2984  * a RECLAIM_COMPLETE request
2985  */
2986 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2987                                           struct xdr_stream *xdr,
2988                                           const void *data)
2989 {
2990         const struct nfs41_reclaim_complete_args *args = data;
2991         struct compound_hdr hdr = {
2992                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2993         };
2994
2995         encode_compound_hdr(xdr, req, &hdr);
2996         encode_sequence(xdr, &args->seq_args, &hdr);
2997         encode_reclaim_complete(xdr, args, &hdr);
2998         encode_nops(&hdr);
2999 }
3000
3001 /*
3002  * Encode GETDEVICEINFO request
3003  */
3004 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3005                                        struct xdr_stream *xdr,
3006                                        const void *data)
3007 {
3008         const struct nfs4_getdeviceinfo_args *args = data;
3009         struct compound_hdr hdr = {
3010                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3011         };
3012
3013         encode_compound_hdr(xdr, req, &hdr);
3014         encode_sequence(xdr, &args->seq_args, &hdr);
3015         encode_getdeviceinfo(xdr, args, &hdr);
3016
3017         /* set up reply kvec. Subtract notification bitmap max size (2)
3018          * so that notification bitmap is put in xdr_buf tail */
3019         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3020                                 args->pdev->pglen, hdr.replen - 2);
3021         encode_nops(&hdr);
3022 }
3023
3024 /*
3025  *  Encode LAYOUTGET request
3026  */
3027 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3028                                    struct xdr_stream *xdr,
3029                                    const void *data)
3030 {
3031         const struct nfs4_layoutget_args *args = data;
3032         struct compound_hdr hdr = {
3033                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3034         };
3035
3036         encode_compound_hdr(xdr, req, &hdr);
3037         encode_sequence(xdr, &args->seq_args, &hdr);
3038         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3039         encode_layoutget(xdr, args, &hdr);
3040
3041         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3042                                 args->layout.pglen, hdr.replen);
3043         encode_nops(&hdr);
3044 }
3045
3046 /*
3047  *  Encode LAYOUTCOMMIT request
3048  */
3049 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3050                                       struct xdr_stream *xdr,
3051                                       const void *priv)
3052 {
3053         const struct nfs4_layoutcommit_args *args = priv;
3054         struct nfs4_layoutcommit_data *data =
3055                 container_of(args, struct nfs4_layoutcommit_data, args);
3056         struct compound_hdr hdr = {
3057                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3058         };
3059
3060         encode_compound_hdr(xdr, req, &hdr);
3061         encode_sequence(xdr, &args->seq_args, &hdr);
3062         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3063         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3064         encode_getfattr(xdr, args->bitmask, &hdr);
3065         encode_nops(&hdr);
3066 }
3067
3068 /*
3069  * Encode LAYOUTRETURN request
3070  */
3071 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3072                                       struct xdr_stream *xdr,
3073                                       const void *data)
3074 {
3075         const struct nfs4_layoutreturn_args *args = data;
3076         struct compound_hdr hdr = {
3077                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3078         };
3079
3080         encode_compound_hdr(xdr, req, &hdr);
3081         encode_sequence(xdr, &args->seq_args, &hdr);
3082         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3083         encode_layoutreturn(xdr, args, &hdr);
3084         encode_nops(&hdr);
3085 }
3086
3087 /*
3088  * Encode SECINFO_NO_NAME request
3089  */
3090 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3091                                         struct xdr_stream *xdr,
3092                                         const void *data)
3093 {
3094         const struct nfs41_secinfo_no_name_args *args = data;
3095         struct compound_hdr hdr = {
3096                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3097         };
3098
3099         encode_compound_hdr(xdr, req, &hdr);
3100         encode_sequence(xdr, &args->seq_args, &hdr);
3101         encode_putrootfh(xdr, &hdr);
3102         encode_secinfo_no_name(xdr, args, &hdr);
3103         encode_nops(&hdr);
3104 }
3105
3106 /*
3107  *  Encode TEST_STATEID request
3108  */
3109 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3110                                       struct xdr_stream *xdr,
3111                                       const void *data)
3112 {
3113         const struct nfs41_test_stateid_args *args = data;
3114         struct compound_hdr hdr = {
3115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3116         };
3117
3118         encode_compound_hdr(xdr, req, &hdr);
3119         encode_sequence(xdr, &args->seq_args, &hdr);
3120         encode_test_stateid(xdr, args, &hdr);
3121         encode_nops(&hdr);
3122 }
3123
3124 /*
3125  *  Encode FREE_STATEID request
3126  */
3127 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3128                                      struct xdr_stream *xdr,
3129                                      const void *data)
3130 {
3131         const struct nfs41_free_stateid_args *args = data;
3132         struct compound_hdr hdr = {
3133                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3134         };
3135
3136         encode_compound_hdr(xdr, req, &hdr);
3137         encode_sequence(xdr, &args->seq_args, &hdr);
3138         encode_free_stateid(xdr, args, &hdr);
3139         encode_nops(&hdr);
3140 }
3141 #endif /* CONFIG_NFS_V4_1 */
3142
3143 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3144 {
3145         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3146                         NFS4_OPAQUE_LIMIT);
3147         if (unlikely(ret < 0))
3148                 return -EIO;
3149         *len = ret;
3150         return 0;
3151 }
3152
3153 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3154 {
3155         __be32 *p;
3156
3157         p = xdr_inline_decode(xdr, 8);
3158         if (unlikely(!p))
3159                 return -EIO;
3160         hdr->status = be32_to_cpup(p++);
3161         hdr->taglen = be32_to_cpup(p);
3162
3163         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3164         if (unlikely(!p))
3165                 return -EIO;
3166         hdr->tag = (char *)p;
3167         p += XDR_QUADLEN(hdr->taglen);
3168         hdr->nops = be32_to_cpup(p);
3169         if (unlikely(hdr->nops < 1))
3170                 return nfs4_stat_to_errno(hdr->status);
3171         return 0;
3172 }
3173
3174 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3175                 int *nfs_retval)
3176 {
3177         __be32 *p;
3178         uint32_t opnum;
3179         int32_t nfserr;
3180
3181         p = xdr_inline_decode(xdr, 8);
3182         if (unlikely(!p))
3183                 goto out_overflow;
3184         opnum = be32_to_cpup(p++);
3185         if (unlikely(opnum != expected))
3186                 goto out_bad_operation;
3187         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3188                 goto out_status;
3189         *nfs_retval = 0;
3190         return true;
3191 out_status:
3192         nfserr = be32_to_cpup(p);
3193         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3194         *nfs_retval = nfs4_stat_to_errno(nfserr);
3195         return true;
3196 out_bad_operation:
3197         dprintk("nfs: Server returned operation"
3198                 " %d but we issued a request for %d\n",
3199                         opnum, expected);
3200         *nfs_retval = -EREMOTEIO;
3201         return false;
3202 out_overflow:
3203         *nfs_retval = -EIO;
3204         return false;
3205 }
3206
3207 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3208 {
3209         int retval;
3210
3211         __decode_op_hdr(xdr, expected, &retval);
3212         return retval;
3213 }
3214
3215 /* Dummy routine */
3216 static int decode_ace(struct xdr_stream *xdr, void *ace)
3217 {
3218         __be32 *p;
3219         unsigned int strlen;
3220         char *str;
3221
3222         p = xdr_inline_decode(xdr, 12);
3223         if (unlikely(!p))
3224                 return -EIO;
3225         return decode_opaque_inline(xdr, &strlen, &str);
3226 }
3227
3228 static ssize_t
3229 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3230 {
3231         ssize_t ret;
3232
3233         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3234         if (likely(ret >= 0))
3235                 return ret;
3236         if (ret != -EMSGSIZE)
3237                 return -EIO;
3238         return sz;
3239 }
3240
3241 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3242 {
3243         ssize_t ret;
3244         ret = decode_bitmap4(xdr, bitmap, 3);
3245         return ret < 0 ? ret : 0;
3246 }
3247
3248 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3249 {
3250         __be32 *p;
3251
3252         p = xdr_inline_decode(xdr, 4);
3253         if (unlikely(!p))
3254                 return -EIO;
3255         *attrlen = be32_to_cpup(p);
3256         *savep = xdr_stream_pos(xdr);
3257         return 0;
3258 }
3259
3260 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3261 {
3262         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3263                 int ret;
3264                 ret = decode_attr_bitmap(xdr, bitmask);
3265                 if (unlikely(ret < 0))
3266                         return ret;
3267                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3268         } else
3269                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3270         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3271                 bitmask[0], bitmask[1], bitmask[2]);
3272         return 0;
3273 }
3274
3275 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3276 {
3277         __be32 *p;
3278         int ret = 0;
3279
3280         *type = 0;
3281         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3282                 return -EIO;
3283         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3284                 p = xdr_inline_decode(xdr, 4);
3285                 if (unlikely(!p))
3286                         return -EIO;
3287                 *type = be32_to_cpup(p);
3288                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3289                         dprintk("%s: bad type %d\n", __func__, *type);
3290                         return -EIO;
3291                 }
3292                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3293                 ret = NFS_ATTR_FATTR_TYPE;
3294         }
3295         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3296         return ret;
3297 }
3298
3299 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3300                                       uint32_t *bitmap, uint32_t *type)
3301 {
3302         __be32 *p;
3303
3304         *type = 0;
3305         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3306                 return -EIO;
3307         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3308                 p = xdr_inline_decode(xdr, 4);
3309                 if (unlikely(!p))
3310                         return -EIO;
3311                 *type = be32_to_cpup(p);
3312                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3313         }
3314         dprintk("%s: expire type=0x%x\n", __func__, *type);
3315         return 0;
3316 }
3317
3318 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3319 {
3320         __be32 *p;
3321         int ret = 0;
3322
3323         *change = 0;
3324         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3325                 return -EIO;
3326         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3327                 p = xdr_inline_decode(xdr, 8);
3328                 if (unlikely(!p))
3329                         return -EIO;
3330                 xdr_decode_hyper(p, change);
3331                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3332                 ret = NFS_ATTR_FATTR_CHANGE;
3333         }
3334         dprintk("%s: change attribute=%Lu\n", __func__,
3335                         (unsigned long long)*change);
3336         return ret;
3337 }
3338
3339 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3340 {
3341         __be32 *p;
3342         int ret = 0;
3343
3344         *size = 0;
3345         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3346                 return -EIO;
3347         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3348                 p = xdr_inline_decode(xdr, 8);
3349                 if (unlikely(!p))
3350                         return -EIO;
3351                 xdr_decode_hyper(p, size);
3352                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3353                 ret = NFS_ATTR_FATTR_SIZE;
3354         }
3355         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3356         return ret;
3357 }
3358
3359 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3360 {
3361         __be32 *p;
3362
3363         *res = 0;
3364         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3365                 return -EIO;
3366         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3367                 p = xdr_inline_decode(xdr, 4);
3368                 if (unlikely(!p))
3369                         return -EIO;
3370                 *res = be32_to_cpup(p);
3371                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3372         }
3373         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3374         return 0;
3375 }
3376
3377 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3378 {
3379         __be32 *p;
3380
3381         *res = 0;
3382         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3383                 return -EIO;
3384         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3385                 p = xdr_inline_decode(xdr, 4);
3386                 if (unlikely(!p))
3387                         return -EIO;
3388                 *res = be32_to_cpup(p);
3389                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3390         }
3391         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3392         return 0;
3393 }
3394
3395 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3396 {
3397         __be32 *p;
3398         int ret = 0;
3399
3400         fsid->major = 0;
3401         fsid->minor = 0;
3402         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3403                 return -EIO;
3404         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3405                 p = xdr_inline_decode(xdr, 16);
3406                 if (unlikely(!p))
3407                         return -EIO;
3408                 p = xdr_decode_hyper(p, &fsid->major);
3409                 xdr_decode_hyper(p, &fsid->minor);
3410                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3411                 ret = NFS_ATTR_FATTR_FSID;
3412         }
3413         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3414                         (unsigned long long)fsid->major,
3415                         (unsigned long long)fsid->minor);
3416         return ret;
3417 }
3418
3419 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3420 {
3421         __be32 *p;
3422
3423         *res = 60;
3424         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3425                 return -EIO;
3426         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
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_LEASE_TIME;
3432         }
3433         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3434         return 0;
3435 }
3436
3437 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3438 {
3439         __be32 *p;
3440
3441         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3442                 return -EIO;
3443         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3444                 p = xdr_inline_decode(xdr, 4);
3445                 if (unlikely(!p))
3446                         return -EIO;
3447                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3448                 *res = -be32_to_cpup(p);
3449         }
3450         return 0;
3451 }
3452
3453 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3454                                  uint32_t *bitmap, uint32_t *bitmask)
3455 {
3456         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3457                 int ret;
3458                 ret = decode_attr_bitmap(xdr, bitmask);
3459                 if (unlikely(ret < 0))
3460                         return ret;
3461                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3462         } else
3463                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3464         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3465                 bitmask[0], bitmask[1], bitmask[2]);
3466         return 0;
3467 }
3468
3469 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3470 {
3471         __be32 *p;
3472         u32 len;
3473
3474         if (fh != NULL)
3475                 memset(fh, 0, sizeof(*fh));
3476
3477         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3478                 return -EIO;
3479         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3480                 p = xdr_inline_decode(xdr, 4);
3481                 if (unlikely(!p))
3482                         return -EIO;
3483                 len = be32_to_cpup(p);
3484                 if (len > NFS4_FHSIZE)
3485                         return -EIO;
3486                 p = xdr_inline_decode(xdr, len);
3487                 if (unlikely(!p))
3488                         return -EIO;
3489                 if (fh != NULL) {
3490                         memcpy(fh->data, p, len);
3491                         fh->size = len;
3492                 }
3493                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3494         }
3495         return 0;
3496 }
3497
3498 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3499 {
3500         __be32 *p;
3501
3502         *res = 0;
3503         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3504                 return -EIO;
3505         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3506                 p = xdr_inline_decode(xdr, 4);
3507                 if (unlikely(!p))
3508                         return -EIO;
3509                 *res = be32_to_cpup(p);
3510                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3511         }
3512         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3513         return 0;
3514 }
3515
3516 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3517 {
3518         __be32 *p;
3519         int ret = 0;
3520
3521         *fileid = 0;
3522         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3523                 return -EIO;
3524         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3525                 p = xdr_inline_decode(xdr, 8);
3526                 if (unlikely(!p))
3527                         return -EIO;
3528                 xdr_decode_hyper(p, fileid);
3529                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3530                 ret = NFS_ATTR_FATTR_FILEID;
3531         }
3532         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3533         return ret;
3534 }
3535
3536 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3537 {
3538         __be32 *p;
3539         int ret = 0;
3540
3541         *fileid = 0;
3542         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3543                 return -EIO;
3544         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3545                 p = xdr_inline_decode(xdr, 8);
3546                 if (unlikely(!p))
3547                         return -EIO;
3548                 xdr_decode_hyper(p, fileid);
3549                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3550                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3551         }
3552         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3553         return ret;
3554 }
3555
3556 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3557 {
3558         __be32 *p;
3559         int status = 0;
3560
3561         *res = 0;
3562         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3563                 return -EIO;
3564         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3565                 p = xdr_inline_decode(xdr, 8);
3566                 if (unlikely(!p))
3567                         return -EIO;
3568                 xdr_decode_hyper(p, res);
3569                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3570         }
3571         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3572         return status;
3573 }
3574
3575 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3576 {
3577         __be32 *p;
3578         int status = 0;
3579
3580         *res = 0;
3581         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3582                 return -EIO;
3583         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3584                 p = xdr_inline_decode(xdr, 8);
3585                 if (unlikely(!p))
3586                         return -EIO;
3587                 xdr_decode_hyper(p, res);
3588                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3589         }
3590         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3591         return status;
3592 }
3593
3594 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3595 {
3596         __be32 *p;
3597         int status = 0;
3598
3599         *res = 0;
3600         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3601                 return -EIO;
3602         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3603                 p = xdr_inline_decode(xdr, 8);
3604                 if (unlikely(!p))
3605                         return -EIO;
3606                 xdr_decode_hyper(p, res);
3607                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3608         }
3609         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3610         return status;
3611 }
3612
3613 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3614 {
3615         u32 n;
3616         __be32 *p;
3617         int status = 0;
3618
3619         p = xdr_inline_decode(xdr, 4);
3620         if (unlikely(!p))
3621                 return -EIO;
3622         n = be32_to_cpup(p);
3623         if (n == 0)
3624                 goto root_path;
3625         dprintk("pathname4: ");
3626         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3627                 dprintk("cannot parse %d components in path\n", n);
3628                 goto out_eio;
3629         }
3630         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3631                 struct nfs4_string *component = &path->components[path->ncomponents];
3632                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3633                 if (unlikely(status != 0))
3634                         goto out_eio;
3635                 ifdebug (XDR)
3636                         pr_cont("%s%.*s ",
3637                                 (path->ncomponents != n ? "/ " : ""),
3638                                 component->len, component->data);
3639         }
3640 out:
3641         return status;
3642 root_path:
3643 /* a root pathname is sent as a zero component4 */
3644         path->ncomponents = 1;
3645         path->components[0].len=0;
3646         path->components[0].data=NULL;
3647         dprintk("pathname4: /\n");
3648         goto out;
3649 out_eio:
3650         dprintk(" status %d", status);
3651         status = -EIO;
3652         goto out;
3653 }
3654
3655 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3656 {
3657         int n;
3658         __be32 *p;
3659         int status = -EIO;
3660
3661         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3662                 goto out;
3663         status = 0;
3664         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3665                 goto out;
3666         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3667         status = -EIO;
3668         /* Ignore borken servers that return unrequested attrs */
3669         if (unlikely(res == NULL))
3670                 goto out;
3671         dprintk("%s: fsroot:\n", __func__);
3672         status = decode_pathname(xdr, &res->fs_path);
3673         if (unlikely(status != 0))
3674                 goto out;
3675         p = xdr_inline_decode(xdr, 4);
3676         if (unlikely(!p))
3677                 goto out_eio;
3678         n = be32_to_cpup(p);
3679         if (n <= 0)
3680                 goto out_eio;
3681         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3682                 u32 m;
3683                 struct nfs4_fs_location *loc;
3684
3685                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3686                         break;
3687                 loc = &res->locations[res->nlocations];
3688                 p = xdr_inline_decode(xdr, 4);
3689                 if (unlikely(!p))
3690                         goto out_eio;
3691                 m = be32_to_cpup(p);
3692
3693                 dprintk("%s: servers:\n", __func__);
3694                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3695                         struct nfs4_string *server;
3696
3697                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3698                                 unsigned int i;
3699                                 dprintk("%s: using first %u of %u servers "
3700                                         "returned for location %u\n",
3701                                                 __func__,
3702                                                 NFS4_FS_LOCATION_MAXSERVERS,
3703                                                 m, res->nlocations);
3704                                 for (i = loc->nservers; i < m; i++) {
3705                                         unsigned int len;
3706                                         char *data;
3707                                         status = decode_opaque_inline(xdr, &len, &data);
3708                                         if (unlikely(status != 0))
3709                                                 goto out_eio;
3710                                 }
3711                                 break;
3712                         }
3713                         server = &loc->servers[loc->nservers];
3714                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3715                         if (unlikely(status != 0))
3716                                 goto out_eio;
3717                         dprintk("%s ", server->data);
3718                 }
3719                 status = decode_pathname(xdr, &loc->rootpath);
3720                 if (unlikely(status != 0))
3721                         goto out_eio;
3722         }
3723         if (res->nlocations != 0)
3724                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3725 out:
3726         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3727         return status;
3728 out_eio:
3729         status = -EIO;
3730         goto out;
3731 }
3732
3733 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3734 {
3735         __be32 *p;
3736         int status = 0;
3737
3738         *res = 0;
3739         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3740                 return -EIO;
3741         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3742                 p = xdr_inline_decode(xdr, 8);
3743                 if (unlikely(!p))
3744                         return -EIO;
3745                 xdr_decode_hyper(p, res);
3746                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3747         }
3748         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3749         return status;
3750 }
3751
3752 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3753 {
3754         __be32 *p;
3755         int status = 0;
3756
3757         *maxlink = 1;
3758         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3759                 return -EIO;
3760         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3761                 p = xdr_inline_decode(xdr, 4);
3762                 if (unlikely(!p))
3763                         return -EIO;
3764                 *maxlink = be32_to_cpup(p);
3765                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3766         }
3767         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3768         return status;
3769 }
3770
3771 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3772 {
3773         __be32 *p;
3774         int status = 0;
3775
3776         *maxname = 1024;
3777         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3778                 return -EIO;
3779         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3780                 p = xdr_inline_decode(xdr, 4);
3781                 if (unlikely(!p))
3782                         return -EIO;
3783                 *maxname = be32_to_cpup(p);
3784                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3785         }
3786         dprintk("%s: maxname=%u\n", __func__, *maxname);
3787         return status;
3788 }
3789
3790 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3791 {
3792         __be32 *p;
3793         int status = 0;
3794
3795         *res = 1024;
3796         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3797                 return -EIO;
3798         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3799                 uint64_t maxread;
3800                 p = xdr_inline_decode(xdr, 8);
3801                 if (unlikely(!p))
3802                         return -EIO;
3803                 xdr_decode_hyper(p, &maxread);
3804                 if (maxread > 0x7FFFFFFF)
3805                         maxread = 0x7FFFFFFF;
3806                 *res = (uint32_t)maxread;
3807                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3808         }
3809         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3810         return status;
3811 }
3812
3813 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3814 {
3815         __be32 *p;
3816         int status = 0;
3817
3818         *res = 1024;
3819         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3820                 return -EIO;
3821         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3822                 uint64_t maxwrite;
3823                 p = xdr_inline_decode(xdr, 8);
3824                 if (unlikely(!p))
3825                         return -EIO;
3826                 xdr_decode_hyper(p, &maxwrite);
3827                 if (maxwrite > 0x7FFFFFFF)
3828                         maxwrite = 0x7FFFFFFF;
3829                 *res = (uint32_t)maxwrite;
3830                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3831         }
3832         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3833         return status;
3834 }
3835
3836 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3837 {
3838         uint32_t tmp;
3839         __be32 *p;
3840         int ret = 0;
3841
3842         *mode = 0;
3843         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3844                 return -EIO;
3845         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3846                 p = xdr_inline_decode(xdr, 4);
3847                 if (unlikely(!p))
3848                         return -EIO;
3849                 tmp = be32_to_cpup(p);
3850                 *mode = tmp & ~S_IFMT;
3851                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3852                 ret = NFS_ATTR_FATTR_MODE;
3853         }
3854         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3855         return ret;
3856 }
3857
3858 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3859 {
3860         __be32 *p;
3861         int ret = 0;
3862
3863         *nlink = 1;
3864         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3865                 return -EIO;
3866         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3867                 p = xdr_inline_decode(xdr, 4);
3868                 if (unlikely(!p))
3869                         return -EIO;
3870                 *nlink = be32_to_cpup(p);
3871                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3872                 ret = NFS_ATTR_FATTR_NLINK;
3873         }
3874         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3875         return ret;
3876 }
3877
3878 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3879                 struct nfs4_string *name, gfp_t gfp_flags)
3880 {
3881         ssize_t ret;
3882
3883         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3884                         XDR_MAX_NETOBJ, gfp_flags);
3885         name->len = 0;
3886         if (ret > 0)
3887                 name->len = ret;
3888         return ret;
3889 }
3890
3891 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3892                 const struct nfs_server *server, kuid_t *uid,
3893                 struct nfs4_string *owner_name)
3894 {
3895         ssize_t len;
3896         char *p;
3897
3898         *uid = make_kuid(&init_user_ns, -2);
3899         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3900                 return -EIO;
3901         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3902                 return 0;
3903         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3904
3905         if (owner_name != NULL) {
3906                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3907                 if (len <= 0)
3908                         goto out;
3909                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3910                 return NFS_ATTR_FATTR_OWNER_NAME;
3911         } else {
3912                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3913                                 XDR_MAX_NETOBJ);
3914                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3915                         goto out;
3916                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3917                 return NFS_ATTR_FATTR_OWNER;
3918         }
3919 out:
3920         if (len == -EBADMSG)
3921                 return -EIO;
3922         return 0;
3923 }
3924
3925 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3926                 const struct nfs_server *server, kgid_t *gid,
3927                 struct nfs4_string *group_name)
3928 {
3929         ssize_t len;
3930         char *p;
3931
3932         *gid = make_kgid(&init_user_ns, -2);
3933         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3934                 return -EIO;
3935         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3936                 return 0;
3937         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3938
3939         if (group_name != NULL) {
3940                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3941                 if (len <= 0)
3942                         goto out;
3943                 dprintk("%s: name=%s\n", __func__, group_name->data);
3944                 return NFS_ATTR_FATTR_GROUP_NAME;
3945         } else {
3946                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3947                                 XDR_MAX_NETOBJ);
3948                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3949                         goto out;
3950                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3951                 return NFS_ATTR_FATTR_GROUP;
3952         }
3953 out:
3954         if (len == -EBADMSG)
3955                 return -EIO;
3956         return 0;
3957 }
3958
3959 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3960 {
3961         uint32_t major = 0, minor = 0;
3962         __be32 *p;
3963         int ret = 0;
3964
3965         *rdev = MKDEV(0,0);
3966         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3967                 return -EIO;
3968         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3969                 dev_t tmp;
3970
3971                 p = xdr_inline_decode(xdr, 8);
3972                 if (unlikely(!p))
3973                         return -EIO;
3974                 major = be32_to_cpup(p++);
3975                 minor = be32_to_cpup(p);
3976                 tmp = MKDEV(major, minor);
3977                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3978                         *rdev = tmp;
3979                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3980                 ret = NFS_ATTR_FATTR_RDEV;
3981         }
3982         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3983         return ret;
3984 }
3985
3986 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3987 {
3988         __be32 *p;
3989         int status = 0;
3990
3991         *res = 0;
3992         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3993                 return -EIO;
3994         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3995                 p = xdr_inline_decode(xdr, 8);
3996                 if (unlikely(!p))
3997                         return -EIO;
3998                 xdr_decode_hyper(p, res);
3999                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4000         }
4001         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4002         return status;
4003 }
4004
4005 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4006 {
4007         __be32 *p;
4008         int status = 0;
4009
4010         *res = 0;
4011         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4012                 return -EIO;
4013         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4014                 p = xdr_inline_decode(xdr, 8);
4015                 if (unlikely(!p))
4016                         return -EIO;
4017                 xdr_decode_hyper(p, res);
4018                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4019         }
4020         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4021         return status;
4022 }
4023
4024 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4025 {
4026         __be32 *p;
4027         int status = 0;
4028
4029         *res = 0;
4030         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4031                 return -EIO;
4032         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4033                 p = xdr_inline_decode(xdr, 8);
4034                 if (unlikely(!p))
4035                         return -EIO;
4036                 xdr_decode_hyper(p, res);
4037                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4038         }
4039         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4040         return status;
4041 }
4042
4043 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4044 {
4045         __be32 *p;
4046         int ret = 0;
4047
4048         *used = 0;
4049         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4050                 return -EIO;
4051         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4052                 p = xdr_inline_decode(xdr, 8);
4053                 if (unlikely(!p))
4054                         return -EIO;
4055                 xdr_decode_hyper(p, used);
4056                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4057                 ret = NFS_ATTR_FATTR_SPACE_USED;
4058         }
4059         dprintk("%s: space used=%Lu\n", __func__,
4060                         (unsigned long long)*used);
4061         return ret;
4062 }
4063
4064 static __be32 *
4065 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4066 {
4067         __u64 sec;
4068
4069         p = xdr_decode_hyper(p, &sec);
4070         t-> tv_sec = sec;
4071         t->tv_nsec = be32_to_cpup(p++);
4072         return p;
4073 }
4074
4075 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4076 {
4077         __be32 *p;
4078
4079         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4080         if (unlikely(!p))
4081                 return -EIO;
4082         xdr_decode_nfstime4(p, time);
4083         return 0;
4084 }
4085
4086 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4087 {
4088         int status = 0;
4089
4090         time->tv_sec = 0;
4091         time->tv_nsec = 0;
4092         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4093                 return -EIO;
4094         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4095                 status = decode_attr_time(xdr, time);
4096                 if (status == 0)
4097                         status = NFS_ATTR_FATTR_ATIME;
4098                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4099         }
4100         dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4101         return status;
4102 }
4103
4104 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4105 {
4106         int status = 0;
4107
4108         time->tv_sec = 0;
4109         time->tv_nsec = 0;
4110         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4111                 return -EIO;
4112         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4113                 status = decode_attr_time(xdr, time);
4114                 if (status == 0)
4115                         status = NFS_ATTR_FATTR_CTIME;
4116                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4117         }
4118         dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4119         return status;
4120 }
4121
4122 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4123                                   struct timespec64 *time)
4124 {
4125         int status = 0;
4126
4127         time->tv_sec = 0;
4128         time->tv_nsec = 0;
4129         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4130                 return -EIO;
4131         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4132                 status = decode_attr_time(xdr, time);
4133                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4134         }
4135         dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4136                 time->tv_nsec);
4137         return status;
4138 }
4139
4140 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4141                                         struct nfs4_label *label)
4142 {
4143         uint32_t pi = 0;
4144         uint32_t lfs = 0;
4145         __u32 len;
4146         __be32 *p;
4147         int status = 0;
4148
4149         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4150                 return -EIO;
4151         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4152                 p = xdr_inline_decode(xdr, 4);
4153                 if (unlikely(!p))
4154                         return -EIO;
4155                 lfs = be32_to_cpup(p++);
4156                 p = xdr_inline_decode(xdr, 4);
4157                 if (unlikely(!p))
4158                         return -EIO;
4159                 pi = be32_to_cpup(p++);
4160                 p = xdr_inline_decode(xdr, 4);
4161                 if (unlikely(!p))
4162                         return -EIO;
4163                 len = be32_to_cpup(p++);
4164                 p = xdr_inline_decode(xdr, len);
4165                 if (unlikely(!p))
4166                         return -EIO;
4167                 if (len < NFS4_MAXLABELLEN) {
4168                         if (label) {
4169                                 if (label->len) {
4170                                         if (label->len < len)
4171                                                 return -ERANGE;
4172                                         memcpy(label->label, p, len);
4173                                 }
4174                                 label->len = len;
4175                                 label->pi = pi;
4176                                 label->lfs = lfs;
4177                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4178                         }
4179                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4180                 } else
4181                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4182                                         __func__, len);
4183         }
4184         if (label && label->label)
4185                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4186                         (char *)label->label, label->len, label->pi, label->lfs);
4187         return status;
4188 }
4189
4190 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4191 {
4192         int status = 0;
4193
4194         time->tv_sec = 0;
4195         time->tv_nsec = 0;
4196         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4197                 return -EIO;
4198         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4199                 status = decode_attr_time(xdr, time);
4200                 if (status == 0)
4201                         status = NFS_ATTR_FATTR_MTIME;
4202                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4203         }
4204         dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4205         return status;
4206 }
4207
4208 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4209                                     uint32_t *res)
4210 {
4211         __be32 *p;
4212
4213         *res = 0;
4214         if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4215                 return -EIO;
4216         if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4217                 p = xdr_inline_decode(xdr, 4);
4218                 if (unlikely(!p))
4219                         return -EIO;
4220                 *res = be32_to_cpup(p);
4221                 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4222         }
4223         dprintk("%s: XATTR support=%s\n", __func__,
4224                 *res == 0 ? "false" : "true");
4225         return 0;
4226 }
4227
4228 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4229 {
4230         unsigned int attrwords = XDR_QUADLEN(attrlen);
4231         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4232
4233         if (unlikely(attrwords != nwords)) {
4234                 dprintk("%s: server returned incorrect attribute length: "
4235                         "%u %c %u\n",
4236                                 __func__,
4237                                 attrwords << 2,
4238                                 (attrwords < nwords) ? '<' : '>',
4239                                 nwords << 2);
4240                 return -EIO;
4241         }
4242         return 0;
4243 }
4244
4245 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4246 {
4247         __be32 *p;
4248
4249         p = xdr_inline_decode(xdr, 20);
4250         if (unlikely(!p))
4251                 return -EIO;
4252         cinfo->atomic = be32_to_cpup(p++);
4253         p = xdr_decode_hyper(p, &cinfo->before);
4254         xdr_decode_hyper(p, &cinfo->after);
4255         return 0;
4256 }
4257
4258 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4259 {
4260         __be32 *p;
4261         uint32_t supp, acc;
4262         int status;
4263
4264         status = decode_op_hdr(xdr, OP_ACCESS);
4265         if (status)
4266                 return status;
4267         p = xdr_inline_decode(xdr, 8);
4268         if (unlikely(!p))
4269                 return -EIO;
4270         supp = be32_to_cpup(p++);
4271         acc = be32_to_cpup(p);
4272         *supported = supp;
4273         *access = acc;
4274         return 0;
4275 }
4276
4277 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4278 {
4279         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4280         if (unlikely(ret < 0))
4281                 return -EIO;
4282         return 0;
4283 }
4284
4285 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4286 {
4287         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4288 }
4289
4290 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4291 {
4292         stateid->type = NFS4_OPEN_STATEID_TYPE;
4293         return decode_stateid(xdr, stateid);
4294 }
4295
4296 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4297 {
4298         stateid->type = NFS4_LOCK_STATEID_TYPE;
4299         return decode_stateid(xdr, stateid);
4300 }
4301
4302 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4303 {
4304         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4305         return decode_stateid(xdr, stateid);
4306 }
4307
4308 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4309 {
4310         nfs4_stateid dummy;
4311
4312         nfs4_stateid_copy(stateid, &invalid_stateid);
4313         return decode_stateid(xdr, &dummy);
4314 }
4315
4316 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4317 {
4318         int status;
4319
4320         status = decode_op_hdr(xdr, OP_CLOSE);
4321         if (status != -EIO)
4322                 nfs_increment_open_seqid(status, res->seqid);
4323         if (!status)
4324                 status = decode_invalid_stateid(xdr, &res->stateid);
4325         return status;
4326 }
4327
4328 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4329 {
4330         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4331 }
4332
4333 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4334 {
4335         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4336 }
4337
4338 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4339 {
4340         struct nfs_writeverf *verf = res->verf;
4341         int status;
4342
4343         status = decode_op_hdr(xdr, OP_COMMIT);
4344         if (!status)
4345                 status = decode_write_verifier(xdr, &verf->verifier);
4346         if (!status)
4347                 verf->committed = NFS_FILE_SYNC;
4348         return status;
4349 }
4350
4351 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4352 {
4353         __be32 *p;
4354         uint32_t bmlen;
4355         int status;
4356
4357         status = decode_op_hdr(xdr, OP_CREATE);
4358         if (status)
4359                 return status;
4360         if ((status = decode_change_info(xdr, cinfo)))
4361                 return status;
4362         p = xdr_inline_decode(xdr, 4);
4363         if (unlikely(!p))
4364                 return -EIO;
4365         bmlen = be32_to_cpup(p);
4366         p = xdr_inline_decode(xdr, bmlen << 2);
4367         if (likely(p))
4368                 return 0;
4369         return -EIO;
4370 }
4371
4372 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4373 {
4374         unsigned int savep;
4375         uint32_t attrlen, bitmap[3] = {0};
4376         int status;
4377
4378         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4379                 goto xdr_error;
4380         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4381                 goto xdr_error;
4382         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4383                 goto xdr_error;
4384         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4385                 goto xdr_error;
4386         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4387                                                  &res->fh_expire_type)) != 0)
4388                 goto xdr_error;
4389         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4390                 goto xdr_error;
4391         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4392                 goto xdr_error;
4393         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4394                 goto xdr_error;
4395         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4396                                 res->exclcreat_bitmask)) != 0)
4397                 goto xdr_error;
4398         status = verify_attr_len(xdr, savep, attrlen);
4399 xdr_error:
4400         dprintk("%s: xdr returned %d!\n", __func__, -status);
4401         return status;
4402 }
4403
4404 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4405 {
4406         unsigned int savep;
4407         uint32_t attrlen, bitmap[3] = {0};
4408         int status;
4409
4410         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4411                 goto xdr_error;
4412         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4413                 goto xdr_error;
4414         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4415                 goto xdr_error;
4416
4417         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4418                 goto xdr_error;
4419         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4420                 goto xdr_error;
4421         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4422                 goto xdr_error;
4423
4424         status = -EIO;
4425         if (unlikely(bitmap[0]))
4426                 goto xdr_error;
4427
4428         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4429                 goto xdr_error;
4430         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4431                 goto xdr_error;
4432         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4433                 goto xdr_error;
4434
4435         status = verify_attr_len(xdr, savep, attrlen);
4436 xdr_error:
4437         dprintk("%s: xdr returned %d!\n", __func__, -status);
4438         return status;
4439 }
4440
4441 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4442 {
4443         unsigned int savep;
4444         uint32_t attrlen, bitmap[3] = {0};
4445         int status;
4446
4447         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4448                 goto xdr_error;
4449         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4450                 goto xdr_error;
4451         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4452                 goto xdr_error;
4453
4454         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4455                 goto xdr_error;
4456         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4457                 goto xdr_error;
4458
4459         status = verify_attr_len(xdr, savep, attrlen);
4460 xdr_error:
4461         dprintk("%s: xdr returned %d!\n", __func__, -status);
4462         return status;
4463 }
4464
4465 static int decode_threshold_hint(struct xdr_stream *xdr,
4466                                   uint32_t *bitmap,
4467                                   uint64_t *res,
4468                                   uint32_t hint_bit)
4469 {
4470         __be32 *p;
4471
4472         *res = 0;
4473         if (likely(bitmap[0] & hint_bit)) {
4474                 p = xdr_inline_decode(xdr, 8);
4475                 if (unlikely(!p))
4476                         return -EIO;
4477                 xdr_decode_hyper(p, res);
4478         }
4479         return 0;
4480 }
4481
4482 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4483                                         struct nfs4_threshold *res)
4484 {
4485         __be32 *p;
4486         unsigned int savep;
4487         uint32_t bitmap[3] = {0,}, attrlen;
4488         int status;
4489
4490         /* layout type */
4491         p = xdr_inline_decode(xdr, 4);
4492         if (unlikely(!p))
4493                 return -EIO;
4494         res->l_type = be32_to_cpup(p);
4495
4496         /* thi_hintset bitmap */
4497         status = decode_attr_bitmap(xdr, bitmap);
4498         if (status < 0)
4499                 goto xdr_error;
4500
4501         /* thi_hintlist length */
4502         status = decode_attr_length(xdr, &attrlen, &savep);
4503         if (status < 0)
4504                 goto xdr_error;
4505         /* thi_hintlist */
4506         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4507         if (status < 0)
4508                 goto xdr_error;
4509         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4510         if (status < 0)
4511                 goto xdr_error;
4512         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4513                                        THRESHOLD_RD_IO);
4514         if (status < 0)
4515                 goto xdr_error;
4516         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4517                                        THRESHOLD_WR_IO);
4518         if (status < 0)
4519                 goto xdr_error;
4520
4521         status = verify_attr_len(xdr, savep, attrlen);
4522         res->bm = bitmap[0];
4523
4524         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4525                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4526                 res->wr_io_sz);
4527 xdr_error:
4528         dprintk("%s ret=%d!\n", __func__, status);
4529         return status;
4530 }
4531
4532 /*
4533  * Thresholds on pNFS direct I/O vrs MDS I/O
4534  */
4535 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4536                                     uint32_t *bitmap,
4537                                     struct nfs4_threshold *res)
4538 {
4539         __be32 *p;
4540         int status = 0;
4541         uint32_t num;
4542
4543         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4544                 return -EIO;
4545         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4546                 /* Did the server return an unrequested attribute? */
4547                 if (unlikely(res == NULL))
4548                         return -EREMOTEIO;
4549                 p = xdr_inline_decode(xdr, 4);
4550                 if (unlikely(!p))
4551                         return -EIO;
4552                 num = be32_to_cpup(p);
4553                 if (num == 0)
4554                         return 0;
4555                 if (num > 1)
4556                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4557                                 "drivers per filesystem not supported\n",
4558                                 __func__);
4559
4560                 status = decode_first_threshold_item4(xdr, res);
4561                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4562         }
4563         return status;
4564 }
4565
4566 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4567                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4568                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4569                 const struct nfs_server *server)
4570 {
4571         int status;
4572         umode_t fmode = 0;
4573         uint32_t type;
4574         int32_t err;
4575
4576         status = decode_attr_type(xdr, bitmap, &type);
4577         if (status < 0)
4578                 goto xdr_error;
4579         fattr->mode = 0;
4580         if (status != 0) {
4581                 fattr->mode |= nfs_type2fmt[type];
4582                 fattr->valid |= status;
4583         }
4584
4585         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4586         if (status < 0)
4587                 goto xdr_error;
4588         fattr->valid |= status;
4589
4590         status = decode_attr_size(xdr, bitmap, &fattr->size);
4591         if (status < 0)
4592                 goto xdr_error;
4593         fattr->valid |= status;
4594
4595         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4596         if (status < 0)
4597                 goto xdr_error;
4598         fattr->valid |= status;
4599
4600         err = 0;
4601         status = decode_attr_error(xdr, bitmap, &err);
4602         if (status < 0)
4603                 goto xdr_error;
4604
4605         status = decode_attr_filehandle(xdr, bitmap, fh);
4606         if (status < 0)
4607                 goto xdr_error;
4608
4609         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4610         if (status < 0)
4611                 goto xdr_error;
4612         fattr->valid |= status;
4613
4614         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4615         if (status < 0)
4616                 goto xdr_error;
4617         fattr->valid |= status;
4618
4619         status = -EIO;
4620         if (unlikely(bitmap[0]))
4621                 goto xdr_error;
4622
4623         status = decode_attr_mode(xdr, bitmap, &fmode);
4624         if (status < 0)
4625                 goto xdr_error;
4626         if (status != 0) {
4627                 fattr->mode |= fmode;
4628                 fattr->valid |= status;
4629         }
4630
4631         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4632         if (status < 0)
4633                 goto xdr_error;
4634         fattr->valid |= status;
4635
4636         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4637         if (status < 0)
4638                 goto xdr_error;
4639         fattr->valid |= status;
4640
4641         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4642         if (status < 0)
4643                 goto xdr_error;
4644         fattr->valid |= status;
4645
4646         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4647         if (status < 0)
4648                 goto xdr_error;
4649         fattr->valid |= status;
4650
4651         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4652         if (status < 0)
4653                 goto xdr_error;
4654         fattr->valid |= status;
4655
4656         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4657         if (status < 0)
4658                 goto xdr_error;
4659         fattr->valid |= status;
4660
4661         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4662         if (status < 0)
4663                 goto xdr_error;
4664         fattr->valid |= status;
4665
4666         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4667         if (status < 0)
4668                 goto xdr_error;
4669         fattr->valid |= status;
4670
4671         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4672         if (status < 0)
4673                 goto xdr_error;
4674         fattr->valid |= status;
4675
4676         status = -EIO;
4677         if (unlikely(bitmap[1]))
4678                 goto xdr_error;
4679
4680         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4681         if (status < 0)
4682                 goto xdr_error;
4683
4684         if (label) {
4685                 status = decode_attr_security_label(xdr, bitmap, label);
4686                 if (status < 0)
4687                         goto xdr_error;
4688                 fattr->valid |= status;
4689         }
4690
4691 xdr_error:
4692         dprintk("%s: xdr returned %d\n", __func__, -status);
4693         return status;
4694 }
4695
4696 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4697                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4698                 struct nfs4_label *label, const struct nfs_server *server)
4699 {
4700         unsigned int savep;
4701         uint32_t attrlen,
4702                  bitmap[3] = {0};
4703         int status;
4704
4705         status = decode_op_hdr(xdr, OP_GETATTR);
4706         if (status < 0)
4707                 goto xdr_error;
4708
4709         status = decode_attr_bitmap(xdr, bitmap);
4710         if (status < 0)
4711                 goto xdr_error;
4712
4713         status = decode_attr_length(xdr, &attrlen, &savep);
4714         if (status < 0)
4715                 goto xdr_error;
4716
4717         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4718                                         label, server);
4719         if (status < 0)
4720                 goto xdr_error;
4721
4722         status = verify_attr_len(xdr, savep, attrlen);
4723 xdr_error:
4724         dprintk("%s: xdr returned %d\n", __func__, -status);
4725         return status;
4726 }
4727
4728 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4729                 struct nfs4_label *label, const struct nfs_server *server)
4730 {
4731         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4732 }
4733
4734 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4735                 const struct nfs_server *server)
4736 {
4737         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4738 }
4739
4740 /*
4741  * Decode potentially multiple layout types.
4742  */
4743 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4744                                     struct nfs_fsinfo *fsinfo)
4745 {
4746         __be32 *p;
4747         uint32_t i;
4748
4749         p = xdr_inline_decode(xdr, 4);
4750         if (unlikely(!p))
4751                 return -EIO;
4752         fsinfo->nlayouttypes = be32_to_cpup(p);
4753
4754         /* pNFS is not supported by the underlying file system */
4755         if (fsinfo->nlayouttypes == 0)
4756                 return 0;
4757
4758         /* Decode and set first layout type, move xdr->p past unused types */
4759         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4760         if (unlikely(!p))
4761                 return -EIO;
4762
4763         /* If we get too many, then just cap it at the max */
4764         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4765                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4766                         __func__, fsinfo->nlayouttypes);
4767                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4768         }
4769
4770         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4771                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4772         return 0;
4773 }
4774
4775 /*
4776  * The type of file system exported.
4777  * Note we must ensure that layouttype is set in any non-error case.
4778  */
4779 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4780                                 struct nfs_fsinfo *fsinfo)
4781 {
4782         int status = 0;
4783
4784         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4785         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4786                 return -EIO;
4787         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4788                 status = decode_pnfs_layout_types(xdr, fsinfo);
4789                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4790         }
4791         return status;
4792 }
4793
4794 /*
4795  * The prefered block size for layout directed io
4796  */
4797 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4798                                       uint32_t *res)
4799 {
4800         __be32 *p;
4801
4802         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4803         *res = 0;
4804         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4805                 p = xdr_inline_decode(xdr, 4);
4806                 if (unlikely(!p))
4807                         return -EIO;
4808                 *res = be32_to_cpup(p);
4809                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4810         }
4811         return 0;
4812 }
4813
4814 /*
4815  * The granularity of a CLONE operation.
4816  */
4817 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4818                                      uint32_t *res)
4819 {
4820         __be32 *p;
4821
4822         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4823         *res = 0;
4824         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4825                 p = xdr_inline_decode(xdr, 4);
4826                 if (unlikely(!p))
4827                         return -EIO;
4828                 *res = be32_to_cpup(p);
4829                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4830         }
4831         return 0;
4832 }
4833
4834 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4835 {
4836         unsigned int savep;
4837         uint32_t attrlen, bitmap[3];
4838         int status;
4839
4840         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4841                 goto xdr_error;
4842         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4843                 goto xdr_error;
4844         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4845                 goto xdr_error;
4846
4847         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4848
4849         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4850                 goto xdr_error;
4851         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4852                 goto xdr_error;
4853         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4854                 goto xdr_error;
4855         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4856         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4857                 goto xdr_error;
4858         fsinfo->wtpref = fsinfo->wtmax;
4859
4860         status = -EIO;
4861         if (unlikely(bitmap[0]))
4862                 goto xdr_error;
4863
4864         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4865         if (status != 0)
4866                 goto xdr_error;
4867         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4868         if (status != 0)
4869                 goto xdr_error;
4870
4871         status = -EIO;
4872         if (unlikely(bitmap[1]))
4873                 goto xdr_error;
4874
4875         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4876         if (status)
4877                 goto xdr_error;
4878         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4879         if (status)
4880                 goto xdr_error;
4881
4882         status = decode_attr_xattrsupport(xdr, bitmap,
4883                                           &fsinfo->xattr_support);
4884         if (status)
4885                 goto xdr_error;
4886
4887         status = verify_attr_len(xdr, savep, attrlen);
4888 xdr_error:
4889         dprintk("%s: xdr returned %d!\n", __func__, -status);
4890         return status;
4891 }
4892
4893 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4894 {
4895         __be32 *p;
4896         uint32_t len;
4897         int status;
4898
4899         /* Zero handle first to allow comparisons */
4900         memset(fh, 0, sizeof(*fh));
4901
4902         status = decode_op_hdr(xdr, OP_GETFH);
4903         if (status)
4904                 return status;
4905
4906         p = xdr_inline_decode(xdr, 4);
4907         if (unlikely(!p))
4908                 return -EIO;
4909         len = be32_to_cpup(p);
4910         if (len > NFS4_FHSIZE)
4911                 return -EIO;
4912         fh->size = len;
4913         p = xdr_inline_decode(xdr, len);
4914         if (unlikely(!p))
4915                 return -EIO;
4916         memcpy(fh->data, p, len);
4917         return 0;
4918 }
4919
4920 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4921 {
4922         int status;
4923
4924         status = decode_op_hdr(xdr, OP_LINK);
4925         if (status)
4926                 return status;
4927         return decode_change_info(xdr, cinfo);
4928 }
4929
4930 /*
4931  * We create the owner, so we know a proper owner.id length is 4.
4932  */
4933 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4934 {
4935         uint64_t offset, length, clientid;
4936         __be32 *p;
4937         uint32_t namelen, type;
4938
4939         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4940         if (unlikely(!p))
4941                 return -EIO;
4942         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4943         p = xdr_decode_hyper(p, &length);
4944         type = be32_to_cpup(p++); /* 4 byte read */
4945         if (fl != NULL) { /* manipulate file lock */
4946                 fl->fl_start = (loff_t)offset;
4947                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4948                 if (length == ~(uint64_t)0)
4949                         fl->fl_end = OFFSET_MAX;
4950                 fl->fl_type = F_WRLCK;
4951                 if (type & 1)
4952                         fl->fl_type = F_RDLCK;
4953                 fl->fl_pid = 0;
4954         }
4955         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4956         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4957         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4958         if (likely(!p))
4959                 return -EIO;
4960         return -NFS4ERR_DENIED;
4961 }
4962
4963 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4964 {
4965         int status;
4966
4967         status = decode_op_hdr(xdr, OP_LOCK);
4968         if (status == -EIO)
4969                 goto out;
4970         if (status == 0) {
4971                 status = decode_lock_stateid(xdr, &res->stateid);
4972                 if (unlikely(status))
4973                         goto out;
4974         } else if (status == -NFS4ERR_DENIED)
4975                 status = decode_lock_denied(xdr, NULL);
4976         if (res->open_seqid != NULL)
4977                 nfs_increment_open_seqid(status, res->open_seqid);
4978         nfs_increment_lock_seqid(status, res->lock_seqid);
4979 out:
4980         return status;
4981 }
4982
4983 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4984 {
4985         int status;
4986         status = decode_op_hdr(xdr, OP_LOCKT);
4987         if (status == -NFS4ERR_DENIED)
4988                 return decode_lock_denied(xdr, res->denied);
4989         return status;
4990 }
4991
4992 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4993 {
4994         int status;
4995
4996         status = decode_op_hdr(xdr, OP_LOCKU);
4997         if (status != -EIO)
4998                 nfs_increment_lock_seqid(status, res->seqid);
4999         if (status == 0)
5000                 status = decode_lock_stateid(xdr, &res->stateid);
5001         return status;
5002 }
5003
5004 static int decode_release_lockowner(struct xdr_stream *xdr)
5005 {
5006         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5007 }
5008
5009 static int decode_lookup(struct xdr_stream *xdr)
5010 {
5011         return decode_op_hdr(xdr, OP_LOOKUP);
5012 }
5013
5014 static int decode_lookupp(struct xdr_stream *xdr)
5015 {
5016         return decode_op_hdr(xdr, OP_LOOKUPP);
5017 }
5018
5019 /* This is too sick! */
5020 static int decode_space_limit(struct xdr_stream *xdr,
5021                 unsigned long *pagemod_limit)
5022 {
5023         __be32 *p;
5024         uint32_t limit_type, nblocks, blocksize;
5025         u64 maxsize = 0;
5026
5027         p = xdr_inline_decode(xdr, 12);
5028         if (unlikely(!p))
5029                 return -EIO;
5030         limit_type = be32_to_cpup(p++);
5031         switch (limit_type) {
5032         case NFS4_LIMIT_SIZE:
5033                 xdr_decode_hyper(p, &maxsize);
5034                 break;
5035         case NFS4_LIMIT_BLOCKS:
5036                 nblocks = be32_to_cpup(p++);
5037                 blocksize = be32_to_cpup(p);
5038                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5039         }
5040         maxsize >>= PAGE_SHIFT;
5041         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5042         return 0;
5043 }
5044
5045 static int decode_rw_delegation(struct xdr_stream *xdr,
5046                 uint32_t delegation_type,
5047                 struct nfs_openres *res)
5048 {
5049         __be32 *p;
5050         int status;
5051
5052         status = decode_delegation_stateid(xdr, &res->delegation);
5053         if (unlikely(status))
5054                 return status;
5055         p = xdr_inline_decode(xdr, 4);
5056         if (unlikely(!p))
5057                 return -EIO;
5058         res->do_recall = be32_to_cpup(p);
5059
5060         switch (delegation_type) {
5061         case NFS4_OPEN_DELEGATE_READ:
5062                 res->delegation_type = FMODE_READ;
5063                 break;
5064         case NFS4_OPEN_DELEGATE_WRITE:
5065                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5066                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5067                                 return -EIO;
5068         }
5069         return decode_ace(xdr, NULL);
5070 }
5071
5072 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5073 {
5074         __be32 *p;
5075         uint32_t why_no_delegation;
5076
5077         p = xdr_inline_decode(xdr, 4);
5078         if (unlikely(!p))
5079                 return -EIO;
5080         why_no_delegation = be32_to_cpup(p);
5081         switch (why_no_delegation) {
5082                 case WND4_CONTENTION:
5083                 case WND4_RESOURCE:
5084                         xdr_inline_decode(xdr, 4);
5085                         /* Ignore for now */
5086         }
5087         return 0;
5088 }
5089
5090 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5091 {
5092         __be32 *p;
5093         uint32_t delegation_type;
5094
5095         p = xdr_inline_decode(xdr, 4);
5096         if (unlikely(!p))
5097                 return -EIO;
5098         delegation_type = be32_to_cpup(p);
5099         res->delegation_type = 0;
5100         switch (delegation_type) {
5101         case NFS4_OPEN_DELEGATE_NONE:
5102                 return 0;
5103         case NFS4_OPEN_DELEGATE_READ:
5104         case NFS4_OPEN_DELEGATE_WRITE:
5105                 return decode_rw_delegation(xdr, delegation_type, res);
5106         case NFS4_OPEN_DELEGATE_NONE_EXT:
5107                 return decode_no_delegation(xdr, res);
5108         }
5109         return -EIO;
5110 }
5111
5112 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5113 {
5114         __be32 *p;
5115         uint32_t savewords, bmlen, i;
5116         int status;
5117
5118         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5119                 return status;
5120         nfs_increment_open_seqid(status, res->seqid);
5121         if (status)
5122                 return status;
5123         status = decode_open_stateid(xdr, &res->stateid);
5124         if (unlikely(status))
5125                 return status;
5126
5127         decode_change_info(xdr, &res->cinfo);
5128
5129         p = xdr_inline_decode(xdr, 8);
5130         if (unlikely(!p))
5131                 return -EIO;
5132         res->rflags = be32_to_cpup(p++);
5133         bmlen = be32_to_cpup(p);
5134         if (bmlen > 10)
5135                 goto xdr_error;
5136
5137         p = xdr_inline_decode(xdr, bmlen << 2);
5138         if (unlikely(!p))
5139                 return -EIO;
5140         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5141         for (i = 0; i < savewords; ++i)
5142                 res->attrset[i] = be32_to_cpup(p++);
5143         for (; i < NFS4_BITMAP_SIZE; i++)
5144                 res->attrset[i] = 0;
5145
5146         return decode_delegation(xdr, res);
5147 xdr_error:
5148         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5149         return -EIO;
5150 }
5151
5152 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5153 {
5154         int status;
5155
5156         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5157         if (status != -EIO)
5158                 nfs_increment_open_seqid(status, res->seqid);
5159         if (!status)
5160                 status = decode_open_stateid(xdr, &res->stateid);
5161         return status;
5162 }
5163
5164 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5165 {
5166         int status;
5167
5168         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5169         if (status != -EIO)
5170                 nfs_increment_open_seqid(status, res->seqid);
5171         if (!status)
5172                 status = decode_open_stateid(xdr, &res->stateid);
5173         return status;
5174 }
5175
5176 static int decode_putfh(struct xdr_stream *xdr)
5177 {
5178         return decode_op_hdr(xdr, OP_PUTFH);
5179 }
5180
5181 static int decode_putrootfh(struct xdr_stream *xdr)
5182 {
5183         return decode_op_hdr(xdr, OP_PUTROOTFH);
5184 }
5185
5186 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5187                        struct nfs_pgio_res *res)
5188 {
5189         __be32 *p;
5190         uint32_t count, eof, recvd;
5191         int status;
5192
5193         status = decode_op_hdr(xdr, OP_READ);
5194         if (status)
5195                 return status;
5196         p = xdr_inline_decode(xdr, 8);
5197         if (unlikely(!p))
5198                 return -EIO;
5199         eof = be32_to_cpup(p++);
5200         count = be32_to_cpup(p);
5201         recvd = xdr_read_pages(xdr, count);
5202         if (count > recvd) {
5203                 dprintk("NFS: server cheating in read reply: "
5204                                 "count %u > recvd %u\n", count, recvd);
5205                 count = recvd;
5206                 eof = 0;
5207         }
5208         res->eof = eof;
5209         res->count = count;
5210         return 0;
5211 }
5212
5213 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5214 {
5215         int             status;
5216         __be32          verf[2];
5217
5218         status = decode_op_hdr(xdr, OP_READDIR);
5219         if (!status)
5220                 status = decode_verifier(xdr, readdir->verifier.data);
5221         if (unlikely(status))
5222                 return status;
5223         memcpy(verf, readdir->verifier.data, sizeof(verf));
5224         dprintk("%s: verifier = %08x:%08x\n",
5225                         __func__, verf[0], verf[1]);
5226         return xdr_read_pages(xdr, xdr->buf->page_len);
5227 }
5228
5229 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5230 {
5231         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5232         u32 len, recvd;
5233         __be32 *p;
5234         int status;
5235
5236         status = decode_op_hdr(xdr, OP_READLINK);
5237         if (status)
5238                 return status;
5239
5240         /* Convert length of symlink */
5241         p = xdr_inline_decode(xdr, 4);
5242         if (unlikely(!p))
5243                 return -EIO;
5244         len = be32_to_cpup(p);
5245         if (len >= rcvbuf->page_len || len <= 0) {
5246                 dprintk("nfs: server returned giant symlink!\n");
5247                 return -ENAMETOOLONG;
5248         }
5249         recvd = xdr_read_pages(xdr, len);
5250         if (recvd < len) {
5251                 dprintk("NFS: server cheating in readlink reply: "
5252                                 "count %u > recvd %u\n", len, recvd);
5253                 return -EIO;
5254         }
5255         /*
5256          * The XDR encode routine has set things up so that
5257          * the link text will be copied directly into the
5258          * buffer.  We just have to do overflow-checking,
5259          * and null-terminate the text (the VFS expects
5260          * null-termination).
5261          */
5262         xdr_terminate_string(rcvbuf, len);
5263         return 0;
5264 }
5265
5266 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5267 {
5268         int status;
5269
5270         status = decode_op_hdr(xdr, OP_REMOVE);
5271         if (status)
5272                 goto out;
5273         status = decode_change_info(xdr, cinfo);
5274 out:
5275         return status;
5276 }
5277
5278 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5279               struct nfs4_change_info *new_cinfo)
5280 {
5281         int status;
5282
5283         status = decode_op_hdr(xdr, OP_RENAME);
5284         if (status)
5285                 goto out;
5286         if ((status = decode_change_info(xdr, old_cinfo)))
5287                 goto out;
5288         status = decode_change_info(xdr, new_cinfo);
5289 out:
5290         return status;
5291 }
5292
5293 static int decode_renew(struct xdr_stream *xdr)
5294 {
5295         return decode_op_hdr(xdr, OP_RENEW);
5296 }
5297
5298 static int
5299 decode_restorefh(struct xdr_stream *xdr)
5300 {
5301         return decode_op_hdr(xdr, OP_RESTOREFH);
5302 }
5303
5304 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5305                          struct nfs_getaclres *res)
5306 {
5307         unsigned int savep;
5308         uint32_t attrlen,
5309                  bitmap[3] = {0};
5310         int status;
5311         unsigned int pg_offset;
5312
5313         res->acl_len = 0;
5314         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5315                 goto out;
5316
5317         xdr_enter_page(xdr, xdr->buf->page_len);
5318
5319         /* Calculate the offset of the page data */
5320         pg_offset = xdr->buf->head[0].iov_len;
5321
5322         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5323                 goto out;
5324         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5325                 goto out;
5326
5327         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5328                 return -EIO;
5329         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5330
5331                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5332                  * are stored with the acl data to handle the problem of
5333                  * variable length bitmaps.*/
5334                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5335                 res->acl_len = attrlen;
5336
5337                 /* Check for receive buffer overflow */
5338                 if (res->acl_len > (xdr->nwords << 2) ||
5339                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5340                         res->acl_flags |= NFS4_ACL_TRUNC;
5341                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5342                                         attrlen, xdr->nwords << 2);
5343                 }
5344         } else
5345                 status = -EOPNOTSUPP;
5346
5347 out:
5348         return status;
5349 }
5350
5351 static int
5352 decode_savefh(struct xdr_stream *xdr)
5353 {
5354         return decode_op_hdr(xdr, OP_SAVEFH);
5355 }
5356
5357 static int decode_setattr(struct xdr_stream *xdr)
5358 {
5359         int status;
5360
5361         status = decode_op_hdr(xdr, OP_SETATTR);
5362         if (status)
5363                 return status;
5364         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5365                 return 0;
5366         return -EIO;
5367 }
5368
5369 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5370 {
5371         __be32 *p;
5372         uint32_t opnum;
5373         int32_t nfserr;
5374
5375         p = xdr_inline_decode(xdr, 8);
5376         if (unlikely(!p))
5377                 return -EIO;
5378         opnum = be32_to_cpup(p++);
5379         if (opnum != OP_SETCLIENTID) {
5380                 dprintk("nfs: decode_setclientid: Server returned operation"
5381                         " %d\n", opnum);
5382                 return -EIO;
5383         }
5384         nfserr = be32_to_cpup(p);
5385         if (nfserr == NFS_OK) {
5386                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5387                 if (unlikely(!p))
5388                         return -EIO;
5389                 p = xdr_decode_hyper(p, &res->clientid);
5390                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5391         } else if (nfserr == NFSERR_CLID_INUSE) {
5392                 uint32_t len;
5393
5394                 /* skip netid string */
5395                 p = xdr_inline_decode(xdr, 4);
5396                 if (unlikely(!p))
5397                         return -EIO;
5398                 len = be32_to_cpup(p);
5399                 p = xdr_inline_decode(xdr, len);
5400                 if (unlikely(!p))
5401                         return -EIO;
5402
5403                 /* skip uaddr string */
5404                 p = xdr_inline_decode(xdr, 4);
5405                 if (unlikely(!p))
5406                         return -EIO;
5407                 len = be32_to_cpup(p);
5408                 p = xdr_inline_decode(xdr, len);
5409                 if (unlikely(!p))
5410                         return -EIO;
5411                 return -NFSERR_CLID_INUSE;
5412         } else
5413                 return nfs4_stat_to_errno(nfserr);
5414
5415         return 0;
5416 }
5417
5418 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5419 {
5420         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5421 }
5422
5423 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5424 {
5425         __be32 *p;
5426         int status;
5427
5428         status = decode_op_hdr(xdr, OP_WRITE);
5429         if (status)
5430                 return status;
5431
5432         p = xdr_inline_decode(xdr, 8);
5433         if (unlikely(!p))
5434                 return -EIO;
5435         res->count = be32_to_cpup(p++);
5436         res->verf->committed = be32_to_cpup(p++);
5437         return decode_write_verifier(xdr, &res->verf->verifier);
5438 }
5439
5440 static int decode_delegreturn(struct xdr_stream *xdr)
5441 {
5442         return decode_op_hdr(xdr, OP_DELEGRETURN);
5443 }
5444
5445 static int decode_secinfo_gss(struct xdr_stream *xdr,
5446                               struct nfs4_secinfo4 *flavor)
5447 {
5448         u32 oid_len;
5449         __be32 *p;
5450
5451         p = xdr_inline_decode(xdr, 4);
5452         if (unlikely(!p))
5453                 return -EIO;
5454         oid_len = be32_to_cpup(p);
5455         if (oid_len > GSS_OID_MAX_LEN)
5456                 return -EINVAL;
5457
5458         p = xdr_inline_decode(xdr, oid_len);
5459         if (unlikely(!p))
5460                 return -EIO;
5461         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5462         flavor->flavor_info.oid.len = oid_len;
5463
5464         p = xdr_inline_decode(xdr, 8);
5465         if (unlikely(!p))
5466                 return -EIO;
5467         flavor->flavor_info.qop = be32_to_cpup(p++);
5468         flavor->flavor_info.service = be32_to_cpup(p);
5469
5470         return 0;
5471 }
5472
5473 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5474 {
5475         struct nfs4_secinfo4 *sec_flavor;
5476         unsigned int i, num_flavors;
5477         int status;
5478         __be32 *p;
5479
5480         p = xdr_inline_decode(xdr, 4);
5481         if (unlikely(!p))
5482                 return -EIO;
5483
5484         res->flavors->num_flavors = 0;
5485         num_flavors = be32_to_cpup(p);
5486
5487         for (i = 0; i < num_flavors; i++) {
5488                 sec_flavor = &res->flavors->flavors[i];
5489                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5490                         break;
5491
5492                 p = xdr_inline_decode(xdr, 4);
5493                 if (unlikely(!p))
5494                         return -EIO;
5495                 sec_flavor->flavor = be32_to_cpup(p);
5496
5497                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5498                         status = decode_secinfo_gss(xdr, sec_flavor);
5499                         if (status)
5500                                 goto out;
5501                 }
5502                 res->flavors->num_flavors++;
5503         }
5504
5505         status = 0;
5506 out:
5507         return status;
5508 }
5509
5510 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5511 {
5512         int status = decode_op_hdr(xdr, OP_SECINFO);
5513         if (status)
5514                 return status;
5515         return decode_secinfo_common(xdr, res);
5516 }
5517
5518 #if defined(CONFIG_NFS_V4_1)
5519 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5520 {
5521         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5522         if (status)
5523                 return status;
5524         return decode_secinfo_common(xdr, res);
5525 }
5526
5527 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5528 {
5529         __be32 *p;
5530         uint32_t bitmap_words;
5531         unsigned int i;
5532
5533         p = xdr_inline_decode(xdr, 4);
5534         if (!p)
5535                 return -EIO;
5536         bitmap_words = be32_to_cpup(p++);
5537         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5538                 return -EIO;
5539         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5540         for (i = 0; i < bitmap_words; i++)
5541                 op_map->u.words[i] = be32_to_cpup(p++);
5542
5543         return 0;
5544 }
5545
5546 static int decode_exchange_id(struct xdr_stream *xdr,
5547                               struct nfs41_exchange_id_res *res)
5548 {
5549         __be32 *p;
5550         uint32_t dummy;
5551         char *dummy_str;
5552         int status;
5553         uint32_t impl_id_count;
5554
5555         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5556         if (status)
5557                 return status;
5558
5559         p = xdr_inline_decode(xdr, 8);
5560         if (unlikely(!p))
5561                 return -EIO;
5562         xdr_decode_hyper(p, &res->clientid);
5563         p = xdr_inline_decode(xdr, 12);
5564         if (unlikely(!p))
5565                 return -EIO;
5566         res->seqid = be32_to_cpup(p++);
5567         res->flags = be32_to_cpup(p++);
5568
5569         res->state_protect.how = be32_to_cpup(p);
5570         switch (res->state_protect.how) {
5571         case SP4_NONE:
5572                 break;
5573         case SP4_MACH_CRED:
5574                 status = decode_op_map(xdr, &res->state_protect.enforce);
5575                 if (status)
5576                         return status;
5577                 status = decode_op_map(xdr, &res->state_protect.allow);
5578                 if (status)
5579                         return status;
5580                 break;
5581         default:
5582                 WARN_ON_ONCE(1);
5583                 return -EIO;
5584         }
5585
5586         /* server_owner4.so_minor_id */
5587         p = xdr_inline_decode(xdr, 8);
5588         if (unlikely(!p))
5589                 return -EIO;
5590         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5591
5592         /* server_owner4.so_major_id */
5593         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5594         if (unlikely(status))
5595                 return status;
5596         memcpy(res->server_owner->major_id, dummy_str, dummy);
5597         res->server_owner->major_id_sz = dummy;
5598
5599         /* server_scope4 */
5600         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5601         if (unlikely(status))
5602                 return status;
5603         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5604         res->server_scope->server_scope_sz = dummy;
5605
5606         /* Implementation Id */
5607         p = xdr_inline_decode(xdr, 4);
5608         if (unlikely(!p))
5609                 return -EIO;
5610         impl_id_count = be32_to_cpup(p++);
5611
5612         if (impl_id_count) {
5613                 /* nii_domain */
5614                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5615                 if (unlikely(status))
5616                         return status;
5617                 memcpy(res->impl_id->domain, dummy_str, dummy);
5618
5619                 /* nii_name */
5620                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5621                 if (unlikely(status))
5622                         return status;
5623                 memcpy(res->impl_id->name, dummy_str, dummy);
5624
5625                 /* nii_date */
5626                 p = xdr_inline_decode(xdr, 12);
5627                 if (unlikely(!p))
5628                         return -EIO;
5629                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5630                 res->impl_id->date.nseconds = be32_to_cpup(p);
5631
5632                 /* if there's more than one entry, ignore the rest */
5633         }
5634         return 0;
5635 }
5636
5637 static int decode_chan_attrs(struct xdr_stream *xdr,
5638                              struct nfs4_channel_attrs *attrs)
5639 {
5640         __be32 *p;
5641         u32 nr_attrs, val;
5642
5643         p = xdr_inline_decode(xdr, 28);
5644         if (unlikely(!p))
5645                 return -EIO;
5646         val = be32_to_cpup(p++);        /* headerpadsz */
5647         if (val)
5648                 return -EINVAL;         /* no support for header padding yet */
5649         attrs->max_rqst_sz = be32_to_cpup(p++);
5650         attrs->max_resp_sz = be32_to_cpup(p++);
5651         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5652         attrs->max_ops = be32_to_cpup(p++);
5653         attrs->max_reqs = be32_to_cpup(p++);
5654         nr_attrs = be32_to_cpup(p);
5655         if (unlikely(nr_attrs > 1)) {
5656                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5657                         "count %u\n", __func__, nr_attrs);
5658                 return -EINVAL;
5659         }
5660         if (nr_attrs == 1) {
5661                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5662                 if (unlikely(!p))
5663                         return -EIO;
5664         }
5665         return 0;
5666 }
5667
5668 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5669 {
5670         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5671 }
5672
5673 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5674                                 struct nfs41_bind_conn_to_session_res *res)
5675 {
5676         __be32 *p;
5677         int status;
5678
5679         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5680         if (!status)
5681                 status = decode_sessionid(xdr, &res->sessionid);
5682         if (unlikely(status))
5683                 return status;
5684
5685         /* dir flags, rdma mode bool */
5686         p = xdr_inline_decode(xdr, 8);
5687         if (unlikely(!p))
5688                 return -EIO;
5689
5690         res->dir = be32_to_cpup(p++);
5691         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5692                 return -EIO;
5693         if (be32_to_cpup(p) == 0)
5694                 res->use_conn_in_rdma_mode = false;
5695         else
5696                 res->use_conn_in_rdma_mode = true;
5697
5698         return 0;
5699 }
5700
5701 static int decode_create_session(struct xdr_stream *xdr,
5702                                  struct nfs41_create_session_res *res)
5703 {
5704         __be32 *p;
5705         int status;
5706
5707         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5708         if (!status)
5709                 status = decode_sessionid(xdr, &res->sessionid);
5710         if (unlikely(status))
5711                 return status;
5712
5713         /* seqid, flags */
5714         p = xdr_inline_decode(xdr, 8);
5715         if (unlikely(!p))
5716                 return -EIO;
5717         res->seqid = be32_to_cpup(p++);
5718         res->flags = be32_to_cpup(p);
5719
5720         /* Channel attributes */
5721         status = decode_chan_attrs(xdr, &res->fc_attrs);
5722         if (!status)
5723                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5724         return status;
5725 }
5726
5727 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5728 {
5729         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5730 }
5731
5732 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5733 {
5734         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5735 }
5736
5737 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5738 {
5739         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5740 }
5741 #endif /* CONFIG_NFS_V4_1 */
5742
5743 static int decode_sequence(struct xdr_stream *xdr,
5744                            struct nfs4_sequence_res *res,
5745                            struct rpc_rqst *rqstp)
5746 {
5747 #if defined(CONFIG_NFS_V4_1)
5748         struct nfs4_session *session;
5749         struct nfs4_sessionid id;
5750         u32 dummy;
5751         int status;
5752         __be32 *p;
5753
5754         if (res->sr_slot == NULL)
5755                 return 0;
5756         if (!res->sr_slot->table->session)
5757                 return 0;
5758
5759         status = decode_op_hdr(xdr, OP_SEQUENCE);
5760         if (!status)
5761                 status = decode_sessionid(xdr, &id);
5762         if (unlikely(status))
5763                 goto out_err;
5764
5765         /*
5766          * If the server returns different values for sessionID, slotID or
5767          * sequence number, the server is looney tunes.
5768          */
5769         status = -EREMOTEIO;
5770         session = res->sr_slot->table->session;
5771
5772         if (memcmp(id.data, session->sess_id.data,
5773                    NFS4_MAX_SESSIONID_LEN)) {
5774                 dprintk("%s Invalid session id\n", __func__);
5775                 goto out_err;
5776         }
5777
5778         p = xdr_inline_decode(xdr, 20);
5779         if (unlikely(!p))
5780                 goto out_overflow;
5781
5782         /* seqid */
5783         dummy = be32_to_cpup(p++);
5784         if (dummy != res->sr_slot->seq_nr) {
5785                 dprintk("%s Invalid sequence number\n", __func__);
5786                 goto out_err;
5787         }
5788         /* slot id */
5789         dummy = be32_to_cpup(p++);
5790         if (dummy != res->sr_slot->slot_nr) {
5791                 dprintk("%s Invalid slot id\n", __func__);
5792                 goto out_err;
5793         }
5794         /* highest slot id */
5795         res->sr_highest_slotid = be32_to_cpup(p++);
5796         /* target highest slot id */
5797         res->sr_target_highest_slotid = be32_to_cpup(p++);
5798         /* result flags */
5799         res->sr_status_flags = be32_to_cpup(p);
5800         status = 0;
5801 out_err:
5802         res->sr_status = status;
5803         return status;
5804 out_overflow:
5805         status = -EIO;
5806         goto out_err;
5807 #else  /* CONFIG_NFS_V4_1 */
5808         return 0;
5809 #endif /* CONFIG_NFS_V4_1 */
5810 }
5811
5812 #if defined(CONFIG_NFS_V4_1)
5813 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5814 {
5815         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5816         return decode_stateid(xdr, stateid);
5817 }
5818
5819 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5820                                 struct nfs4_getdeviceinfo_res *res)
5821 {
5822         struct pnfs_device *pdev = res->pdev;
5823         __be32 *p;
5824         uint32_t len, type;
5825         int status;
5826
5827         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5828         if (status) {
5829                 if (status == -ETOOSMALL) {
5830                         p = xdr_inline_decode(xdr, 4);
5831                         if (unlikely(!p))
5832                                 return -EIO;
5833                         pdev->mincount = be32_to_cpup(p);
5834                         dprintk("%s: Min count too small. mincnt = %u\n",
5835                                 __func__, pdev->mincount);
5836                 }
5837                 return status;
5838         }
5839
5840         p = xdr_inline_decode(xdr, 8);
5841         if (unlikely(!p))
5842                 return -EIO;
5843         type = be32_to_cpup(p++);
5844         if (type != pdev->layout_type) {
5845                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5846                         __func__, pdev->layout_type, type);
5847                 return -EINVAL;
5848         }
5849         /*
5850          * Get the length of the opaque device_addr4. xdr_read_pages places
5851          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5852          * and places the remaining xdr data in xdr_buf->tail
5853          */
5854         pdev->mincount = be32_to_cpup(p);
5855         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5856                 return -EIO;
5857
5858         /* Parse notification bitmap, verifying that it is zero. */
5859         p = xdr_inline_decode(xdr, 4);
5860         if (unlikely(!p))
5861                 return -EIO;
5862         len = be32_to_cpup(p);
5863         if (len) {
5864                 uint32_t i;
5865
5866                 p = xdr_inline_decode(xdr, 4 * len);
5867                 if (unlikely(!p))
5868                         return -EIO;
5869
5870                 res->notification = be32_to_cpup(p++);
5871                 for (i = 1; i < len; i++) {
5872                         if (be32_to_cpup(p++)) {
5873                                 dprintk("%s: unsupported notification\n",
5874                                         __func__);
5875                                 return -EIO;
5876                         }
5877                 }
5878         }
5879         return 0;
5880 }
5881
5882 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5883                             struct nfs4_layoutget_res *res)
5884 {
5885         __be32 *p;
5886         int status;
5887         u32 layout_count;
5888         u32 recvd;
5889
5890         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5891         if (status)
5892                 goto out;
5893         p = xdr_inline_decode(xdr, 4);
5894         if (unlikely(!p))
5895                 goto out_overflow;
5896         res->return_on_close = be32_to_cpup(p);
5897         decode_layout_stateid(xdr, &res->stateid);
5898         p = xdr_inline_decode(xdr, 4);
5899         if (unlikely(!p))
5900                 goto out_overflow;
5901         layout_count = be32_to_cpup(p);
5902         if (!layout_count) {
5903                 dprintk("%s: server responded with empty layout array\n",
5904                         __func__);
5905                 status = -EINVAL;
5906                 goto out;
5907         }
5908
5909         p = xdr_inline_decode(xdr, 28);
5910         if (unlikely(!p))
5911                 goto out_overflow;
5912         p = xdr_decode_hyper(p, &res->range.offset);
5913         p = xdr_decode_hyper(p, &res->range.length);
5914         res->range.iomode = be32_to_cpup(p++);
5915         res->type = be32_to_cpup(p++);
5916         res->layoutp->len = be32_to_cpup(p);
5917
5918         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5919                 __func__,
5920                 (unsigned long)res->range.offset,
5921                 (unsigned long)res->range.length,
5922                 res->range.iomode,
5923                 res->type,
5924                 res->layoutp->len);
5925
5926         recvd = xdr_read_pages(xdr, res->layoutp->len);
5927         if (res->layoutp->len > recvd) {
5928                 dprintk("NFS: server cheating in layoutget reply: "
5929                                 "layout len %u > recvd %u\n",
5930                                 res->layoutp->len, recvd);
5931                 status = -EINVAL;
5932                 goto out;
5933         }
5934
5935         if (layout_count > 1) {
5936                 /* We only handle a length one array at the moment.  Any
5937                  * further entries are just ignored.  Note that this means
5938                  * the client may see a response that is less than the
5939                  * minimum it requested.
5940                  */
5941                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5942                         __func__, layout_count);
5943         }
5944
5945 out:
5946         res->status = status;
5947         return status;
5948 out_overflow:
5949         status = -EIO;
5950         goto out;
5951 }
5952
5953 static int decode_layoutreturn(struct xdr_stream *xdr,
5954                                struct nfs4_layoutreturn_res *res)
5955 {
5956         __be32 *p;
5957         int status;
5958
5959         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5960         if (status)
5961                 return status;
5962         p = xdr_inline_decode(xdr, 4);
5963         if (unlikely(!p))
5964                 return -EIO;
5965         res->lrs_present = be32_to_cpup(p);
5966         if (res->lrs_present)
5967                 status = decode_layout_stateid(xdr, &res->stateid);
5968         else
5969                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5970         return status;
5971 }
5972
5973 static int decode_layoutcommit(struct xdr_stream *xdr,
5974                                struct rpc_rqst *req,
5975                                struct nfs4_layoutcommit_res *res)
5976 {
5977         __be32 *p;
5978         __u32 sizechanged;
5979         int status;
5980
5981         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5982         res->status = status;
5983         if (status)
5984                 return status;
5985
5986         p = xdr_inline_decode(xdr, 4);
5987         if (unlikely(!p))
5988                 return -EIO;
5989         sizechanged = be32_to_cpup(p);
5990
5991         if (sizechanged) {
5992                 /* throw away new size */
5993                 p = xdr_inline_decode(xdr, 8);
5994                 if (unlikely(!p))
5995                         return -EIO;
5996         }
5997         return 0;
5998 }
5999
6000 static int decode_test_stateid(struct xdr_stream *xdr,
6001                                struct nfs41_test_stateid_res *res)
6002 {
6003         __be32 *p;
6004         int status;
6005         int num_res;
6006
6007         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6008         if (status)
6009                 return status;
6010
6011         p = xdr_inline_decode(xdr, 4);
6012         if (unlikely(!p))
6013                 return -EIO;
6014         num_res = be32_to_cpup(p++);
6015         if (num_res != 1)
6016                 return -EIO;
6017
6018         p = xdr_inline_decode(xdr, 4);
6019         if (unlikely(!p))
6020                 return -EIO;
6021         res->status = be32_to_cpup(p++);
6022
6023         return status;
6024 }
6025
6026 static int decode_free_stateid(struct xdr_stream *xdr,
6027                                struct nfs41_free_stateid_res *res)
6028 {
6029         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6030         return res->status;
6031 }
6032 #else
6033 static inline
6034 int decode_layoutreturn(struct xdr_stream *xdr,
6035                                struct nfs4_layoutreturn_res *res)
6036 {
6037         return 0;
6038 }
6039
6040 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6041                             struct nfs4_layoutget_res *res)
6042 {
6043         return 0;
6044 }
6045
6046 #endif /* CONFIG_NFS_V4_1 */
6047
6048 /*
6049  * END OF "GENERIC" DECODE ROUTINES.
6050  */
6051
6052 /*
6053  * Decode OPEN_DOWNGRADE response
6054  */
6055 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6056                                        struct xdr_stream *xdr,
6057                                        void *data)
6058 {
6059         struct nfs_closeres *res = data;
6060         struct compound_hdr hdr;
6061         int status;
6062
6063         status = decode_compound_hdr(xdr, &hdr);
6064         if (status)
6065                 goto out;
6066         status = decode_sequence(xdr, &res->seq_res, rqstp);
6067         if (status)
6068                 goto out;
6069         status = decode_putfh(xdr);
6070         if (status)
6071                 goto out;
6072         if (res->lr_res) {
6073                 status = decode_layoutreturn(xdr, res->lr_res);
6074                 res->lr_ret = status;
6075                 if (status)
6076                         goto out;
6077         }
6078         status = decode_open_downgrade(xdr, res);
6079 out:
6080         return status;
6081 }
6082
6083 /*
6084  * Decode ACCESS response
6085  */
6086 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6087                                void *data)
6088 {
6089         struct nfs4_accessres *res = data;
6090         struct compound_hdr hdr;
6091         int status;
6092
6093         status = decode_compound_hdr(xdr, &hdr);
6094         if (status)
6095                 goto out;
6096         status = decode_sequence(xdr, &res->seq_res, rqstp);
6097         if (status)
6098                 goto out;
6099         status = decode_putfh(xdr);
6100         if (status != 0)
6101                 goto out;
6102         status = decode_access(xdr, &res->supported, &res->access);
6103         if (status != 0)
6104                 goto out;
6105         if (res->fattr)
6106                 decode_getfattr(xdr, res->fattr, res->server);
6107 out:
6108         return status;
6109 }
6110
6111 /*
6112  * Decode LOOKUP response
6113  */
6114 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6115                                void *data)
6116 {
6117         struct nfs4_lookup_res *res = data;
6118         struct compound_hdr hdr;
6119         int status;
6120
6121         status = decode_compound_hdr(xdr, &hdr);
6122         if (status)
6123                 goto out;
6124         status = decode_sequence(xdr, &res->seq_res, rqstp);
6125         if (status)
6126                 goto out;
6127         status = decode_putfh(xdr);
6128         if (status)
6129                 goto out;
6130         status = decode_lookup(xdr);
6131         if (status)
6132                 goto out;
6133         status = decode_getfh(xdr, res->fh);
6134         if (status)
6135                 goto out;
6136         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6137 out:
6138         return status;
6139 }
6140
6141 /*
6142  * Decode LOOKUPP response
6143  */
6144 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6145                 void *data)
6146 {
6147         struct nfs4_lookupp_res *res = data;
6148         struct compound_hdr hdr;
6149         int status;
6150
6151         status = decode_compound_hdr(xdr, &hdr);
6152         if (status)
6153                 goto out;
6154         status = decode_sequence(xdr, &res->seq_res, rqstp);
6155         if (status)
6156                 goto out;
6157         status = decode_putfh(xdr);
6158         if (status)
6159                 goto out;
6160         status = decode_lookupp(xdr);
6161         if (status)
6162                 goto out;
6163         status = decode_getfh(xdr, res->fh);
6164         if (status)
6165                 goto out;
6166         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6167 out:
6168         return status;
6169 }
6170
6171 /*
6172  * Decode LOOKUP_ROOT response
6173  */
6174 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6175                                     struct xdr_stream *xdr,
6176                                     void *data)
6177 {
6178         struct nfs4_lookup_res *res = data;
6179         struct compound_hdr hdr;
6180         int status;
6181
6182         status = decode_compound_hdr(xdr, &hdr);
6183         if (status)
6184                 goto out;
6185         status = decode_sequence(xdr, &res->seq_res, rqstp);
6186         if (status)
6187                 goto out;
6188         status = decode_putrootfh(xdr);
6189         if (status)
6190                 goto out;
6191         status = decode_getfh(xdr, res->fh);
6192         if (status == 0)
6193                 status = decode_getfattr_label(xdr, res->fattr,
6194                                                 res->label, res->server);
6195 out:
6196         return status;
6197 }
6198
6199 /*
6200  * Decode REMOVE response
6201  */
6202 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203                                void *data)
6204 {
6205         struct nfs_removeres *res = data;
6206         struct compound_hdr hdr;
6207         int status;
6208
6209         status = decode_compound_hdr(xdr, &hdr);
6210         if (status)
6211                 goto out;
6212         status = decode_sequence(xdr, &res->seq_res, rqstp);
6213         if (status)
6214                 goto out;
6215         status = decode_putfh(xdr);
6216         if (status)
6217                 goto out;
6218         status = decode_remove(xdr, &res->cinfo);
6219 out:
6220         return status;
6221 }
6222
6223 /*
6224  * Decode RENAME response
6225  */
6226 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6227                                void *data)
6228 {
6229         struct nfs_renameres *res = data;
6230         struct compound_hdr hdr;
6231         int status;
6232
6233         status = decode_compound_hdr(xdr, &hdr);
6234         if (status)
6235                 goto out;
6236         status = decode_sequence(xdr, &res->seq_res, rqstp);
6237         if (status)
6238                 goto out;
6239         status = decode_putfh(xdr);
6240         if (status)
6241                 goto out;
6242         status = decode_savefh(xdr);
6243         if (status)
6244                 goto out;
6245         status = decode_putfh(xdr);
6246         if (status)
6247                 goto out;
6248         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6249 out:
6250         return status;
6251 }
6252
6253 /*
6254  * Decode LINK response
6255  */
6256 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6257                              void *data)
6258 {
6259         struct nfs4_link_res *res = data;
6260         struct compound_hdr hdr;
6261         int status;
6262
6263         status = decode_compound_hdr(xdr, &hdr);
6264         if (status)
6265                 goto out;
6266         status = decode_sequence(xdr, &res->seq_res, rqstp);
6267         if (status)
6268                 goto out;
6269         status = decode_putfh(xdr);
6270         if (status)
6271                 goto out;
6272         status = decode_savefh(xdr);
6273         if (status)
6274                 goto out;
6275         status = decode_putfh(xdr);
6276         if (status)
6277                 goto out;
6278         status = decode_link(xdr, &res->cinfo);
6279         if (status)
6280                 goto out;
6281         /*
6282          * Note order: OP_LINK leaves the directory as the current
6283          *             filehandle.
6284          */
6285         status = decode_restorefh(xdr);
6286         if (status)
6287                 goto out;
6288         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6289 out:
6290         return status;
6291 }
6292
6293 /*
6294  * Decode CREATE response
6295  */
6296 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6297                                void *data)
6298 {
6299         struct nfs4_create_res *res = data;
6300         struct compound_hdr hdr;
6301         int status;
6302
6303         status = decode_compound_hdr(xdr, &hdr);
6304         if (status)
6305                 goto out;
6306         status = decode_sequence(xdr, &res->seq_res, rqstp);
6307         if (status)
6308                 goto out;
6309         status = decode_putfh(xdr);
6310         if (status)
6311                 goto out;
6312         status = decode_create(xdr, &res->dir_cinfo);
6313         if (status)
6314                 goto out;
6315         status = decode_getfh(xdr, res->fh);
6316         if (status)
6317                 goto out;
6318         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6319 out:
6320         return status;
6321 }
6322
6323 /*
6324  * Decode SYMLINK response
6325  */
6326 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6327                                 void *res)
6328 {
6329         return nfs4_xdr_dec_create(rqstp, xdr, res);
6330 }
6331
6332 /*
6333  * Decode GETATTR response
6334  */
6335 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6336                                 void *data)
6337 {
6338         struct nfs4_getattr_res *res = data;
6339         struct compound_hdr hdr;
6340         int status;
6341
6342         status = decode_compound_hdr(xdr, &hdr);
6343         if (status)
6344                 goto out;
6345         status = decode_sequence(xdr, &res->seq_res, rqstp);
6346         if (status)
6347                 goto out;
6348         status = decode_putfh(xdr);
6349         if (status)
6350                 goto out;
6351         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6352 out:
6353         return status;
6354 }
6355
6356 /*
6357  * Encode an SETACL request
6358  */
6359 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6360                                 const void *data)
6361 {
6362         const struct nfs_setaclargs *args = data;
6363         struct compound_hdr hdr = {
6364                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6365         };
6366
6367         encode_compound_hdr(xdr, req, &hdr);
6368         encode_sequence(xdr, &args->seq_args, &hdr);
6369         encode_putfh(xdr, args->fh, &hdr);
6370         encode_setacl(xdr, args, &hdr);
6371         encode_nops(&hdr);
6372 }
6373
6374 /*
6375  * Decode SETACL response
6376  */
6377 static int
6378 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6379                     void *data)
6380 {
6381         struct nfs_setaclres *res = data;
6382         struct compound_hdr hdr;
6383         int status;
6384
6385         status = decode_compound_hdr(xdr, &hdr);
6386         if (status)
6387                 goto out;
6388         status = decode_sequence(xdr, &res->seq_res, rqstp);
6389         if (status)
6390                 goto out;
6391         status = decode_putfh(xdr);
6392         if (status)
6393                 goto out;
6394         status = decode_setattr(xdr);
6395 out:
6396         return status;
6397 }
6398
6399 /*
6400  * Decode GETACL response
6401  */
6402 static int
6403 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404                     void *data)
6405 {
6406         struct nfs_getaclres *res = data;
6407         struct compound_hdr hdr;
6408         int status;
6409
6410         if (res->acl_scratch != NULL) {
6411                 void *p = page_address(res->acl_scratch);
6412                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6413         }
6414         status = decode_compound_hdr(xdr, &hdr);
6415         if (status)
6416                 goto out;
6417         status = decode_sequence(xdr, &res->seq_res, rqstp);
6418         if (status)
6419                 goto out;
6420         status = decode_putfh(xdr);
6421         if (status)
6422                 goto out;
6423         status = decode_getacl(xdr, rqstp, res);
6424
6425 out:
6426         return status;
6427 }
6428
6429 /*
6430  * Decode CLOSE response
6431  */
6432 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6433                               void *data)
6434 {
6435         struct nfs_closeres *res = data;
6436         struct compound_hdr hdr;
6437         int status;
6438
6439         status = decode_compound_hdr(xdr, &hdr);
6440         if (status)
6441                 goto out;
6442         status = decode_sequence(xdr, &res->seq_res, rqstp);
6443         if (status)
6444                 goto out;
6445         status = decode_putfh(xdr);
6446         if (status)
6447                 goto out;
6448         if (res->lr_res) {
6449                 status = decode_layoutreturn(xdr, res->lr_res);
6450                 res->lr_ret = status;
6451                 if (status)
6452                         goto out;
6453         }
6454         if (res->fattr != NULL) {
6455                 status = decode_getfattr(xdr, res->fattr, res->server);
6456                 if (status != 0)
6457                         goto out;
6458         }
6459         status = decode_close(xdr, res);
6460 out:
6461         return status;
6462 }
6463
6464 /*
6465  * Decode OPEN response
6466  */
6467 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6468                              void *data)
6469 {
6470         struct nfs_openres *res = data;
6471         struct compound_hdr hdr;
6472         int status;
6473
6474         status = decode_compound_hdr(xdr, &hdr);
6475         if (status)
6476                 goto out;
6477         status = decode_sequence(xdr, &res->seq_res, rqstp);
6478         if (status)
6479                 goto out;
6480         status = decode_putfh(xdr);
6481         if (status)
6482                 goto out;
6483         status = decode_open(xdr, res);
6484         if (status)
6485                 goto out;
6486         status = decode_getfh(xdr, &res->fh);
6487         if (status)
6488                 goto out;
6489         if (res->access_request)
6490                 decode_access(xdr, &res->access_supported, &res->access_result);
6491         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6492         if (res->lg_res)
6493                 decode_layoutget(xdr, rqstp, res->lg_res);
6494 out:
6495         return status;
6496 }
6497
6498 /*
6499  * Decode OPEN_CONFIRM response
6500  */
6501 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6502                                      struct xdr_stream *xdr,
6503                                      void *data)
6504 {
6505         struct nfs_open_confirmres *res = data;
6506         struct compound_hdr hdr;
6507         int status;
6508
6509         status = decode_compound_hdr(xdr, &hdr);
6510         if (status)
6511                 goto out;
6512         status = decode_putfh(xdr);
6513         if (status)
6514                 goto out;
6515         status = decode_open_confirm(xdr, res);
6516 out:
6517         return status;
6518 }
6519
6520 /*
6521  * Decode OPEN response
6522  */
6523 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6524                                     struct xdr_stream *xdr,
6525                                     void *data)
6526 {
6527         struct nfs_openres *res = data;
6528         struct compound_hdr hdr;
6529         int status;
6530
6531         status = decode_compound_hdr(xdr, &hdr);
6532         if (status)
6533                 goto out;
6534         status = decode_sequence(xdr, &res->seq_res, rqstp);
6535         if (status)
6536                 goto out;
6537         status = decode_putfh(xdr);
6538         if (status)
6539                 goto out;
6540         status = decode_open(xdr, res);
6541         if (status)
6542                 goto out;
6543         if (res->access_request)
6544                 decode_access(xdr, &res->access_supported, &res->access_result);
6545         decode_getfattr(xdr, res->f_attr, res->server);
6546         if (res->lg_res)
6547                 decode_layoutget(xdr, rqstp, res->lg_res);
6548 out:
6549         return status;
6550 }
6551
6552 /*
6553  * Decode SETATTR response
6554  */
6555 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6556                                 struct xdr_stream *xdr,
6557                                 void *data)
6558 {
6559         struct nfs_setattrres *res = data;
6560         struct compound_hdr hdr;
6561         int status;
6562
6563         status = decode_compound_hdr(xdr, &hdr);
6564         if (status)
6565                 goto out;
6566         status = decode_sequence(xdr, &res->seq_res, rqstp);
6567         if (status)
6568                 goto out;
6569         status = decode_putfh(xdr);
6570         if (status)
6571                 goto out;
6572         status = decode_setattr(xdr);
6573         if (status)
6574                 goto out;
6575         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6576 out:
6577         return status;
6578 }
6579
6580 /*
6581  * Decode LOCK response
6582  */
6583 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584                              void *data)
6585 {
6586         struct nfs_lock_res *res = data;
6587         struct compound_hdr hdr;
6588         int status;
6589
6590         status = decode_compound_hdr(xdr, &hdr);
6591         if (status)
6592                 goto out;
6593         status = decode_sequence(xdr, &res->seq_res, rqstp);
6594         if (status)
6595                 goto out;
6596         status = decode_putfh(xdr);
6597         if (status)
6598                 goto out;
6599         status = decode_lock(xdr, res);
6600 out:
6601         return status;
6602 }
6603
6604 /*
6605  * Decode LOCKT response
6606  */
6607 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6608                               void *data)
6609 {
6610         struct nfs_lockt_res *res = data;
6611         struct compound_hdr hdr;
6612         int status;
6613
6614         status = decode_compound_hdr(xdr, &hdr);
6615         if (status)
6616                 goto out;
6617         status = decode_sequence(xdr, &res->seq_res, rqstp);
6618         if (status)
6619                 goto out;
6620         status = decode_putfh(xdr);
6621         if (status)
6622                 goto out;
6623         status = decode_lockt(xdr, res);
6624 out:
6625         return status;
6626 }
6627
6628 /*
6629  * Decode LOCKU response
6630  */
6631 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6632                               void *data)
6633 {
6634         struct nfs_locku_res *res = data;
6635         struct compound_hdr hdr;
6636         int status;
6637
6638         status = decode_compound_hdr(xdr, &hdr);
6639         if (status)
6640                 goto out;
6641         status = decode_sequence(xdr, &res->seq_res, rqstp);
6642         if (status)
6643                 goto out;
6644         status = decode_putfh(xdr);
6645         if (status)
6646                 goto out;
6647         status = decode_locku(xdr, res);
6648 out:
6649         return status;
6650 }
6651
6652 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6653                                           struct xdr_stream *xdr, void *dummy)
6654 {
6655         struct compound_hdr hdr;
6656         int status;
6657
6658         status = decode_compound_hdr(xdr, &hdr);
6659         if (!status)
6660                 status = decode_release_lockowner(xdr);
6661         return status;
6662 }
6663
6664 /*
6665  * Decode READLINK response
6666  */
6667 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6668                                  struct xdr_stream *xdr,
6669                                  void *data)
6670 {
6671         struct nfs4_readlink_res *res = data;
6672         struct compound_hdr hdr;
6673         int status;
6674
6675         status = decode_compound_hdr(xdr, &hdr);
6676         if (status)
6677                 goto out;
6678         status = decode_sequence(xdr, &res->seq_res, rqstp);
6679         if (status)
6680                 goto out;
6681         status = decode_putfh(xdr);
6682         if (status)
6683                 goto out;
6684         status = decode_readlink(xdr, rqstp);
6685 out:
6686         return status;
6687 }
6688
6689 /*
6690  * Decode READDIR response
6691  */
6692 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6693                                 void *data)
6694 {
6695         struct nfs4_readdir_res *res = data;
6696         struct compound_hdr hdr;
6697         int status;
6698
6699         status = decode_compound_hdr(xdr, &hdr);
6700         if (status)
6701                 goto out;
6702         status = decode_sequence(xdr, &res->seq_res, rqstp);
6703         if (status)
6704                 goto out;
6705         status = decode_putfh(xdr);
6706         if (status)
6707                 goto out;
6708         status = decode_readdir(xdr, rqstp, res);
6709 out:
6710         return status;
6711 }
6712
6713 /*
6714  * Decode Read response
6715  */
6716 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6717                              void *data)
6718 {
6719         struct nfs_pgio_res *res = data;
6720         struct compound_hdr hdr;
6721         int status;
6722
6723         status = decode_compound_hdr(xdr, &hdr);
6724         res->op_status = hdr.status;
6725         if (status)
6726                 goto out;
6727         status = decode_sequence(xdr, &res->seq_res, rqstp);
6728         if (status)
6729                 goto out;
6730         status = decode_putfh(xdr);
6731         if (status)
6732                 goto out;
6733         status = decode_read(xdr, rqstp, res);
6734         if (!status)
6735                 status = res->count;
6736 out:
6737         return status;
6738 }
6739
6740 /*
6741  * Decode WRITE response
6742  */
6743 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6744                               void *data)
6745 {
6746         struct nfs_pgio_res *res = data;
6747         struct compound_hdr hdr;
6748         int status;
6749
6750         status = decode_compound_hdr(xdr, &hdr);
6751         res->op_status = hdr.status;
6752         if (status)
6753                 goto out;
6754         status = decode_sequence(xdr, &res->seq_res, rqstp);
6755         if (status)
6756                 goto out;
6757         status = decode_putfh(xdr);
6758         if (status)
6759                 goto out;
6760         status = decode_write(xdr, res);
6761         if (status)
6762                 goto out;
6763         if (res->fattr)
6764                 decode_getfattr(xdr, res->fattr, res->server);
6765         if (!status)
6766                 status = res->count;
6767 out:
6768         return status;
6769 }
6770
6771 /*
6772  * Decode COMMIT response
6773  */
6774 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6775                                void *data)
6776 {
6777         struct nfs_commitres *res = data;
6778         struct compound_hdr hdr;
6779         int status;
6780
6781         status = decode_compound_hdr(xdr, &hdr);
6782         res->op_status = hdr.status;
6783         if (status)
6784                 goto out;
6785         status = decode_sequence(xdr, &res->seq_res, rqstp);
6786         if (status)
6787                 goto out;
6788         status = decode_putfh(xdr);
6789         if (status)
6790                 goto out;
6791         status = decode_commit(xdr, res);
6792 out:
6793         return status;
6794 }
6795
6796 /*
6797  * Decode FSINFO response
6798  */
6799 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6800                                void *data)
6801 {
6802         struct nfs4_fsinfo_res *res = data;
6803         struct compound_hdr hdr;
6804         int status;
6805
6806         status = decode_compound_hdr(xdr, &hdr);
6807         if (!status)
6808                 status = decode_sequence(xdr, &res->seq_res, req);
6809         if (!status)
6810                 status = decode_putfh(xdr);
6811         if (!status)
6812                 status = decode_fsinfo(xdr, res->fsinfo);
6813         return status;
6814 }
6815
6816 /*
6817  * Decode PATHCONF response
6818  */
6819 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6820                                  void *data)
6821 {
6822         struct nfs4_pathconf_res *res = data;
6823         struct compound_hdr hdr;
6824         int status;
6825
6826         status = decode_compound_hdr(xdr, &hdr);
6827         if (!status)
6828                 status = decode_sequence(xdr, &res->seq_res, req);
6829         if (!status)
6830                 status = decode_putfh(xdr);
6831         if (!status)
6832                 status = decode_pathconf(xdr, res->pathconf);
6833         return status;
6834 }
6835
6836 /*
6837  * Decode STATFS response
6838  */
6839 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6840                                void *data)
6841 {
6842         struct nfs4_statfs_res *res = data;
6843         struct compound_hdr hdr;
6844         int status;
6845
6846         status = decode_compound_hdr(xdr, &hdr);
6847         if (!status)
6848                 status = decode_sequence(xdr, &res->seq_res, req);
6849         if (!status)
6850                 status = decode_putfh(xdr);
6851         if (!status)
6852                 status = decode_statfs(xdr, res->fsstat);
6853         return status;
6854 }
6855
6856 /*
6857  * Decode GETATTR_BITMAP response
6858  */
6859 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6860                                     struct xdr_stream *xdr,
6861                                     void *data)
6862 {
6863         struct nfs4_server_caps_res *res = data;
6864         struct compound_hdr hdr;
6865         int status;
6866
6867         status = decode_compound_hdr(xdr, &hdr);
6868         if (status)
6869                 goto out;
6870         status = decode_sequence(xdr, &res->seq_res, req);
6871         if (status)
6872                 goto out;
6873         status = decode_putfh(xdr);
6874         if (status)
6875                 goto out;
6876         status = decode_server_caps(xdr, res);
6877 out:
6878         return status;
6879 }
6880
6881 /*
6882  * Decode RENEW response
6883  */
6884 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6885                               void *__unused)
6886 {
6887         struct compound_hdr hdr;
6888         int status;
6889
6890         status = decode_compound_hdr(xdr, &hdr);
6891         if (!status)
6892                 status = decode_renew(xdr);
6893         return status;
6894 }
6895
6896 /*
6897  * Decode SETCLIENTID response
6898  */
6899 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6900                                     struct xdr_stream *xdr,
6901                                     void *data)
6902 {
6903         struct nfs4_setclientid_res *res = data;
6904         struct compound_hdr hdr;
6905         int status;
6906
6907         status = decode_compound_hdr(xdr, &hdr);
6908         if (!status)
6909                 status = decode_setclientid(xdr, res);
6910         return status;
6911 }
6912
6913 /*
6914  * Decode SETCLIENTID_CONFIRM response
6915  */
6916 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6917                                             struct xdr_stream *xdr,
6918                                             void *data)
6919 {
6920         struct compound_hdr hdr;
6921         int status;
6922
6923         status = decode_compound_hdr(xdr, &hdr);
6924         if (!status)
6925                 status = decode_setclientid_confirm(xdr);
6926         return status;
6927 }
6928
6929 /*
6930  * Decode DELEGRETURN response
6931  */
6932 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6933                                     struct xdr_stream *xdr,
6934                                     void *data)
6935 {
6936         struct nfs4_delegreturnres *res = data;
6937         struct compound_hdr hdr;
6938         int status;
6939
6940         status = decode_compound_hdr(xdr, &hdr);
6941         if (status)
6942                 goto out;
6943         status = decode_sequence(xdr, &res->seq_res, rqstp);
6944         if (status)
6945                 goto out;
6946         status = decode_putfh(xdr);
6947         if (status != 0)
6948                 goto out;
6949         if (res->lr_res) {
6950                 status = decode_layoutreturn(xdr, res->lr_res);
6951                 res->lr_ret = status;
6952                 if (status)
6953                         goto out;
6954         }
6955         if (res->fattr) {
6956                 status = decode_getfattr(xdr, res->fattr, res->server);
6957                 if (status != 0)
6958                         goto out;
6959         }
6960         status = decode_delegreturn(xdr);
6961 out:
6962         return status;
6963 }
6964
6965 /*
6966  * Decode FS_LOCATIONS response
6967  */
6968 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6969                                      struct xdr_stream *xdr,
6970                                      void *data)
6971 {
6972         struct nfs4_fs_locations_res *res = data;
6973         struct compound_hdr hdr;
6974         int status;
6975
6976         status = decode_compound_hdr(xdr, &hdr);
6977         if (status)
6978                 goto out;
6979         status = decode_sequence(xdr, &res->seq_res, req);
6980         if (status)
6981                 goto out;
6982         status = decode_putfh(xdr);
6983         if (status)
6984                 goto out;
6985         if (res->migration) {
6986                 xdr_enter_page(xdr, PAGE_SIZE);
6987                 status = decode_getfattr_generic(xdr,
6988                                         &res->fs_locations->fattr,
6989                                          NULL, res->fs_locations,
6990                                          NULL, res->fs_locations->server);
6991                 if (status)
6992                         goto out;
6993                 if (res->renew)
6994                         status = decode_renew(xdr);
6995         } else {
6996                 status = decode_lookup(xdr);
6997                 if (status)
6998                         goto out;
6999                 xdr_enter_page(xdr, PAGE_SIZE);
7000                 status = decode_getfattr_generic(xdr,
7001                                         &res->fs_locations->fattr,
7002                                          NULL, res->fs_locations,
7003                                          NULL, res->fs_locations->server);
7004         }
7005 out:
7006         return status;
7007 }
7008
7009 /*
7010  * Decode SECINFO response
7011  */
7012 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7013                                 struct xdr_stream *xdr,
7014                                 void *data)
7015 {
7016         struct nfs4_secinfo_res *res = data;
7017         struct compound_hdr hdr;
7018         int status;
7019
7020         status = decode_compound_hdr(xdr, &hdr);
7021         if (status)
7022                 goto out;
7023         status = decode_sequence(xdr, &res->seq_res, rqstp);
7024         if (status)
7025                 goto out;
7026         status = decode_putfh(xdr);
7027         if (status)
7028                 goto out;
7029         status = decode_secinfo(xdr, res);
7030 out:
7031         return status;
7032 }
7033
7034 /*
7035  * Decode FSID_PRESENT response
7036  */
7037 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7038                                      struct xdr_stream *xdr,
7039                                      void *data)
7040 {
7041         struct nfs4_fsid_present_res *res = data;
7042         struct compound_hdr hdr;
7043         int status;
7044
7045         status = decode_compound_hdr(xdr, &hdr);
7046         if (status)
7047                 goto out;
7048         status = decode_sequence(xdr, &res->seq_res, rqstp);
7049         if (status)
7050                 goto out;
7051         status = decode_putfh(xdr);
7052         if (status)
7053                 goto out;
7054         status = decode_getfh(xdr, res->fh);
7055         if (status)
7056                 goto out;
7057         if (res->renew)
7058                 status = decode_renew(xdr);
7059 out:
7060         return status;
7061 }
7062
7063 #if defined(CONFIG_NFS_V4_1)
7064 /*
7065  * Decode BIND_CONN_TO_SESSION response
7066  */
7067 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7068                                         struct xdr_stream *xdr,
7069                                         void *res)
7070 {
7071         struct compound_hdr hdr;
7072         int status;
7073
7074         status = decode_compound_hdr(xdr, &hdr);
7075         if (!status)
7076                 status = decode_bind_conn_to_session(xdr, res);
7077         return status;
7078 }
7079
7080 /*
7081  * Decode EXCHANGE_ID response
7082  */
7083 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7084                                     struct xdr_stream *xdr,
7085                                     void *res)
7086 {
7087         struct compound_hdr hdr;
7088         int status;
7089
7090         status = decode_compound_hdr(xdr, &hdr);
7091         if (!status)
7092                 status = decode_exchange_id(xdr, res);
7093         return status;
7094 }
7095
7096 /*
7097  * Decode CREATE_SESSION response
7098  */
7099 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7100                                        struct xdr_stream *xdr,
7101                                        void *res)
7102 {
7103         struct compound_hdr hdr;
7104         int status;
7105
7106         status = decode_compound_hdr(xdr, &hdr);
7107         if (!status)
7108                 status = decode_create_session(xdr, res);
7109         return status;
7110 }
7111
7112 /*
7113  * Decode DESTROY_SESSION response
7114  */
7115 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7116                                         struct xdr_stream *xdr,
7117                                         void *res)
7118 {
7119         struct compound_hdr hdr;
7120         int status;
7121
7122         status = decode_compound_hdr(xdr, &hdr);
7123         if (!status)
7124                 status = decode_destroy_session(xdr, res);
7125         return status;
7126 }
7127
7128 /*
7129  * Decode DESTROY_CLIENTID response
7130  */
7131 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7132                                         struct xdr_stream *xdr,
7133                                         void *res)
7134 {
7135         struct compound_hdr hdr;
7136         int status;
7137
7138         status = decode_compound_hdr(xdr, &hdr);
7139         if (!status)
7140                 status = decode_destroy_clientid(xdr, res);
7141         return status;
7142 }
7143
7144 /*
7145  * Decode SEQUENCE response
7146  */
7147 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7148                                  struct xdr_stream *xdr,
7149                                  void *res)
7150 {
7151         struct compound_hdr hdr;
7152         int status;
7153
7154         status = decode_compound_hdr(xdr, &hdr);
7155         if (!status)
7156                 status = decode_sequence(xdr, res, rqstp);
7157         return status;
7158 }
7159
7160 #endif
7161
7162 /*
7163  * Decode GET_LEASE_TIME response
7164  */
7165 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7166                                        struct xdr_stream *xdr,
7167                                        void *data)
7168 {
7169         struct nfs4_get_lease_time_res *res = data;
7170         struct compound_hdr hdr;
7171         int status;
7172
7173         status = decode_compound_hdr(xdr, &hdr);
7174         if (!status)
7175                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7176         if (!status)
7177                 status = decode_putrootfh(xdr);
7178         if (!status)
7179                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7180         return status;
7181 }
7182
7183 #ifdef CONFIG_NFS_V4_1
7184
7185 /*
7186  * Decode RECLAIM_COMPLETE response
7187  */
7188 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7189                                          struct xdr_stream *xdr,
7190                                          void *data)
7191 {
7192         struct nfs41_reclaim_complete_res *res = data;
7193         struct compound_hdr hdr;
7194         int status;
7195
7196         status = decode_compound_hdr(xdr, &hdr);
7197         if (!status)
7198                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7199         if (!status)
7200                 status = decode_reclaim_complete(xdr, NULL);
7201         return status;
7202 }
7203
7204 /*
7205  * Decode GETDEVINFO response
7206  */
7207 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7208                                       struct xdr_stream *xdr,
7209                                       void *data)
7210 {
7211         struct nfs4_getdeviceinfo_res *res = data;
7212         struct compound_hdr hdr;
7213         int status;
7214
7215         status = decode_compound_hdr(xdr, &hdr);
7216         if (status != 0)
7217                 goto out;
7218         status = decode_sequence(xdr, &res->seq_res, rqstp);
7219         if (status != 0)
7220                 goto out;
7221         status = decode_getdeviceinfo(xdr, res);
7222 out:
7223         return status;
7224 }
7225
7226 /*
7227  * Decode LAYOUTGET response
7228  */
7229 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7230                                   struct xdr_stream *xdr,
7231                                   void *data)
7232 {
7233         struct nfs4_layoutget_res *res = data;
7234         struct compound_hdr hdr;
7235         int status;
7236
7237         status = decode_compound_hdr(xdr, &hdr);
7238         if (status)
7239                 goto out;
7240         status = decode_sequence(xdr, &res->seq_res, rqstp);
7241         if (status)
7242                 goto out;
7243         status = decode_putfh(xdr);
7244         if (status)
7245                 goto out;
7246         status = decode_layoutget(xdr, rqstp, res);
7247 out:
7248         return status;
7249 }
7250
7251 /*
7252  * Decode LAYOUTRETURN response
7253  */
7254 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7255                                      struct xdr_stream *xdr,
7256                                      void *data)
7257 {
7258         struct nfs4_layoutreturn_res *res = data;
7259         struct compound_hdr hdr;
7260         int status;
7261
7262         status = decode_compound_hdr(xdr, &hdr);
7263         if (status)
7264                 goto out;
7265         status = decode_sequence(xdr, &res->seq_res, rqstp);
7266         if (status)
7267                 goto out;
7268         status = decode_putfh(xdr);
7269         if (status)
7270                 goto out;
7271         status = decode_layoutreturn(xdr, res);
7272 out:
7273         return status;
7274 }
7275
7276 /*
7277  * Decode LAYOUTCOMMIT response
7278  */
7279 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7280                                      struct xdr_stream *xdr,
7281                                      void *data)
7282 {
7283         struct nfs4_layoutcommit_res *res = data;
7284         struct compound_hdr hdr;
7285         int status;
7286
7287         status = decode_compound_hdr(xdr, &hdr);
7288         if (status)
7289                 goto out;
7290         status = decode_sequence(xdr, &res->seq_res, rqstp);
7291         if (status)
7292                 goto out;
7293         status = decode_putfh(xdr);
7294         if (status)
7295                 goto out;
7296         status = decode_layoutcommit(xdr, rqstp, res);
7297         if (status)
7298                 goto out;
7299         decode_getfattr(xdr, res->fattr, res->server);
7300 out:
7301         return status;
7302 }
7303
7304 /*
7305  * Decode SECINFO_NO_NAME response
7306  */
7307 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7308                                         struct xdr_stream *xdr,
7309                                         void *data)
7310 {
7311         struct nfs4_secinfo_res *res = data;
7312         struct compound_hdr hdr;
7313         int status;
7314
7315         status = decode_compound_hdr(xdr, &hdr);
7316         if (status)
7317                 goto out;
7318         status = decode_sequence(xdr, &res->seq_res, rqstp);
7319         if (status)
7320                 goto out;
7321         status = decode_putrootfh(xdr);
7322         if (status)
7323                 goto out;
7324         status = decode_secinfo_no_name(xdr, res);
7325 out:
7326         return status;
7327 }
7328
7329 /*
7330  * Decode TEST_STATEID response
7331  */
7332 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7333                                      struct xdr_stream *xdr,
7334                                      void *data)
7335 {
7336         struct nfs41_test_stateid_res *res = data;
7337         struct compound_hdr hdr;
7338         int status;
7339
7340         status = decode_compound_hdr(xdr, &hdr);
7341         if (status)
7342                 goto out;
7343         status = decode_sequence(xdr, &res->seq_res, rqstp);
7344         if (status)
7345                 goto out;
7346         status = decode_test_stateid(xdr, res);
7347 out:
7348         return status;
7349 }
7350
7351 /*
7352  * Decode FREE_STATEID response
7353  */
7354 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7355                                      struct xdr_stream *xdr,
7356                                      void *data)
7357 {
7358         struct nfs41_free_stateid_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_free_stateid(xdr, res);
7369 out:
7370         return status;
7371 }
7372 #endif /* CONFIG_NFS_V4_1 */
7373
7374 /**
7375  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7376  *                      the local page cache.
7377  * @xdr: XDR stream where entry resides
7378  * @entry: buffer to fill in with entry data
7379  * @plus: boolean indicating whether this should be a readdirplus entry
7380  *
7381  * Returns zero if successful, otherwise a negative errno value is
7382  * returned.
7383  *
7384  * This function is not invoked during READDIR reply decoding, but
7385  * rather whenever an application invokes the getdents(2) system call
7386  * on a directory already in our cache.
7387  */
7388 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7389                        bool plus)
7390 {
7391         unsigned int savep;
7392         uint32_t bitmap[3] = {0};
7393         uint32_t len;
7394         uint64_t new_cookie;
7395         __be32 *p = xdr_inline_decode(xdr, 4);
7396         if (unlikely(!p))
7397                 return -EAGAIN;
7398         if (*p == xdr_zero) {
7399                 p = xdr_inline_decode(xdr, 4);
7400                 if (unlikely(!p))
7401                         return -EAGAIN;
7402                 if (*p == xdr_zero)
7403                         return -EAGAIN;
7404                 entry->eof = 1;
7405                 return -EBADCOOKIE;
7406         }
7407
7408         p = xdr_inline_decode(xdr, 12);
7409         if (unlikely(!p))
7410                 return -EAGAIN;
7411         p = xdr_decode_hyper(p, &new_cookie);
7412         entry->len = be32_to_cpup(p);
7413
7414         p = xdr_inline_decode(xdr, entry->len);
7415         if (unlikely(!p))
7416                 return -EAGAIN;
7417         entry->name = (const char *) p;
7418
7419         /*
7420          * In case the server doesn't return an inode number,
7421          * we fake one here.  (We don't use inode number 0,
7422          * since glibc seems to choke on it...)
7423          */
7424         entry->ino = 1;
7425         entry->fattr->valid = 0;
7426
7427         if (decode_attr_bitmap(xdr, bitmap) < 0)
7428                 return -EAGAIN;
7429
7430         if (decode_attr_length(xdr, &len, &savep) < 0)
7431                 return -EAGAIN;
7432
7433         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7434                         NULL, entry->label, entry->server) < 0)
7435                 return -EAGAIN;
7436         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7437                 entry->ino = entry->fattr->mounted_on_fileid;
7438         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7439                 entry->ino = entry->fattr->fileid;
7440
7441         entry->d_type = DT_UNKNOWN;
7442         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7443                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7444
7445         entry->prev_cookie = entry->cookie;
7446         entry->cookie = new_cookie;
7447
7448         return 0;
7449 }
7450
7451 /*
7452  * We need to translate between nfs status return values and
7453  * the local errno values which may not be the same.
7454  */
7455 static struct {
7456         int stat;
7457         int errno;
7458 } nfs_errtbl[] = {
7459         { NFS4_OK,              0               },
7460         { NFS4ERR_PERM,         -EPERM          },
7461         { NFS4ERR_NOENT,        -ENOENT         },
7462         { NFS4ERR_IO,           -errno_NFSERR_IO},
7463         { NFS4ERR_NXIO,         -ENXIO          },
7464         { NFS4ERR_ACCESS,       -EACCES         },
7465         { NFS4ERR_EXIST,        -EEXIST         },
7466         { NFS4ERR_XDEV,         -EXDEV          },
7467         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7468         { NFS4ERR_ISDIR,        -EISDIR         },
7469         { NFS4ERR_INVAL,        -EINVAL         },
7470         { NFS4ERR_FBIG,         -EFBIG          },
7471         { NFS4ERR_NOSPC,        -ENOSPC         },
7472         { NFS4ERR_ROFS,         -EROFS          },
7473         { NFS4ERR_MLINK,        -EMLINK         },
7474         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7475         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7476         { NFS4ERR_DQUOT,        -EDQUOT         },
7477         { NFS4ERR_STALE,        -ESTALE         },
7478         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7479         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7480         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7481         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7482         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7483         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7484         { NFS4ERR_LOCKED,       -EAGAIN         },
7485         { NFS4ERR_SYMLINK,      -ELOOP          },
7486         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7487         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7488         { NFS4ERR_NOXATTR,      -ENODATA        },
7489         { NFS4ERR_XATTR2BIG,    -E2BIG          },
7490         { -1,                   -EIO            }
7491 };
7492
7493 /*
7494  * Convert an NFS error code to a local one.
7495  * This one is used jointly by NFSv2 and NFSv3.
7496  */
7497 static int
7498 nfs4_stat_to_errno(int stat)
7499 {
7500         int i;
7501         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7502                 if (nfs_errtbl[i].stat == stat)
7503                         return nfs_errtbl[i].errno;
7504         }
7505         if (stat <= 10000 || stat > 10100) {
7506                 /* The server is looney tunes. */
7507                 return -EREMOTEIO;
7508         }
7509         /* If we cannot translate the error, the recovery routines should
7510          * handle it.
7511          * Note: remaining NFSv4 error codes have values > 10000, so should
7512          * not conflict with native Linux error codes.
7513          */
7514         return -stat;
7515 }
7516
7517 #ifdef CONFIG_NFS_V4_2
7518 #include "nfs42xdr.c"
7519 #endif /* CONFIG_NFS_V4_2 */
7520
7521 #define PROC(proc, argtype, restype)                            \
7522 [NFSPROC4_CLNT_##proc] = {                                      \
7523         .p_proc   = NFSPROC4_COMPOUND,                          \
7524         .p_encode = nfs4_xdr_##argtype,                         \
7525         .p_decode = nfs4_xdr_##restype,                         \
7526         .p_arglen = NFS4_##argtype##_sz,                        \
7527         .p_replen = NFS4_##restype##_sz,                        \
7528         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7529         .p_name   = #proc,                                      \
7530 }
7531
7532 #define STUB(proc)              \
7533 [NFSPROC4_CLNT_##proc] = {      \
7534         .p_name = #proc,        \
7535 }
7536
7537 #if defined(CONFIG_NFS_V4_1)
7538 #define PROC41(proc, argtype, restype)                          \
7539         PROC(proc, argtype, restype)
7540 #else
7541 #define PROC41(proc, argtype, restype)                          \
7542         STUB(proc)
7543 #endif
7544
7545 #if defined(CONFIG_NFS_V4_2)
7546 #define PROC42(proc, argtype, restype)                          \
7547         PROC(proc, argtype, restype)
7548 #else
7549 #define PROC42(proc, argtype, restype)                          \
7550         STUB(proc)
7551 #endif
7552
7553 const struct rpc_procinfo nfs4_procedures[] = {
7554         PROC(READ,              enc_read,               dec_read),
7555         PROC(WRITE,             enc_write,              dec_write),
7556         PROC(COMMIT,            enc_commit,             dec_commit),
7557         PROC(OPEN,              enc_open,               dec_open),
7558         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7559         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7560         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7561         PROC(CLOSE,             enc_close,              dec_close),
7562         PROC(SETATTR,           enc_setattr,            dec_setattr),
7563         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7564         PROC(RENEW,             enc_renew,              dec_renew),
7565         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7566         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7567         PROC(LOCK,              enc_lock,               dec_lock),
7568         PROC(LOCKT,             enc_lockt,              dec_lockt),
7569         PROC(LOCKU,             enc_locku,              dec_locku),
7570         PROC(ACCESS,            enc_access,             dec_access),
7571         PROC(GETATTR,           enc_getattr,            dec_getattr),
7572         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7573         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7574         PROC(REMOVE,            enc_remove,             dec_remove),
7575         PROC(RENAME,            enc_rename,             dec_rename),
7576         PROC(LINK,              enc_link,               dec_link),
7577         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7578         PROC(CREATE,            enc_create,             dec_create),
7579         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7580         PROC(STATFS,            enc_statfs,             dec_statfs),
7581         PROC(READLINK,          enc_readlink,           dec_readlink),
7582         PROC(READDIR,           enc_readdir,            dec_readdir),
7583         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7584         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7585         PROC(GETACL,            enc_getacl,             dec_getacl),
7586         PROC(SETACL,            enc_setacl,             dec_setacl),
7587         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7588         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7589         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7590         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7591         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7592         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7593         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7594         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7595         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7596         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7597         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7598         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7599         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7600         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7601         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7602         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7603         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7604         STUB(GETDEVICELIST),
7605         PROC41(BIND_CONN_TO_SESSION,
7606                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7607         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7608         PROC42(SEEK,            enc_seek,               dec_seek),
7609         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7610         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7611         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7612         PROC42(CLONE,           enc_clone,              dec_clone),
7613         PROC42(COPY,            enc_copy,               dec_copy),
7614         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7615         PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7616         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7617         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7618         PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7619         PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7620         PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7621         PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7622 };
7623
7624 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7625 const struct rpc_version nfs_version4 = {
7626         .number                 = 4,
7627         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7628         .procs                  = nfs4_procedures,
7629         .counts                 = nfs_version4_counts,
7630 };
7631
7632 /*
7633  * Local variables:
7634  *  c-basic-offset: 8
7635  * End:
7636  */