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         uint32_t replen;
3013
3014         encode_compound_hdr(xdr, req, &hdr);
3015         encode_sequence(xdr, &args->seq_args, &hdr);
3016
3017         replen = hdr.replen + op_decode_hdr_maxsz;
3018
3019         encode_getdeviceinfo(xdr, args, &hdr);
3020
3021         /* set up reply kvec. device_addr4 opaque data is read into the
3022          * pages */
3023         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3024                                 args->pdev->pglen, replen + 2 + 1);
3025         encode_nops(&hdr);
3026 }
3027
3028 /*
3029  *  Encode LAYOUTGET request
3030  */
3031 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3032                                    struct xdr_stream *xdr,
3033                                    const void *data)
3034 {
3035         const struct nfs4_layoutget_args *args = data;
3036         struct compound_hdr hdr = {
3037                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3038         };
3039
3040         encode_compound_hdr(xdr, req, &hdr);
3041         encode_sequence(xdr, &args->seq_args, &hdr);
3042         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3043         encode_layoutget(xdr, args, &hdr);
3044
3045         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3046                                 args->layout.pglen, hdr.replen);
3047         encode_nops(&hdr);
3048 }
3049
3050 /*
3051  *  Encode LAYOUTCOMMIT request
3052  */
3053 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3054                                       struct xdr_stream *xdr,
3055                                       const void *priv)
3056 {
3057         const struct nfs4_layoutcommit_args *args = priv;
3058         struct nfs4_layoutcommit_data *data =
3059                 container_of(args, struct nfs4_layoutcommit_data, args);
3060         struct compound_hdr hdr = {
3061                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3062         };
3063
3064         encode_compound_hdr(xdr, req, &hdr);
3065         encode_sequence(xdr, &args->seq_args, &hdr);
3066         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3067         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3068         encode_getfattr(xdr, args->bitmask, &hdr);
3069         encode_nops(&hdr);
3070 }
3071
3072 /*
3073  * Encode LAYOUTRETURN request
3074  */
3075 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3076                                       struct xdr_stream *xdr,
3077                                       const void *data)
3078 {
3079         const struct nfs4_layoutreturn_args *args = data;
3080         struct compound_hdr hdr = {
3081                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3082         };
3083
3084         encode_compound_hdr(xdr, req, &hdr);
3085         encode_sequence(xdr, &args->seq_args, &hdr);
3086         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3087         encode_layoutreturn(xdr, args, &hdr);
3088         encode_nops(&hdr);
3089 }
3090
3091 /*
3092  * Encode SECINFO_NO_NAME request
3093  */
3094 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3095                                         struct xdr_stream *xdr,
3096                                         const void *data)
3097 {
3098         const struct nfs41_secinfo_no_name_args *args = data;
3099         struct compound_hdr hdr = {
3100                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3101         };
3102
3103         encode_compound_hdr(xdr, req, &hdr);
3104         encode_sequence(xdr, &args->seq_args, &hdr);
3105         encode_putrootfh(xdr, &hdr);
3106         encode_secinfo_no_name(xdr, args, &hdr);
3107         encode_nops(&hdr);
3108 }
3109
3110 /*
3111  *  Encode TEST_STATEID request
3112  */
3113 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3114                                       struct xdr_stream *xdr,
3115                                       const void *data)
3116 {
3117         const struct nfs41_test_stateid_args *args = data;
3118         struct compound_hdr hdr = {
3119                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3120         };
3121
3122         encode_compound_hdr(xdr, req, &hdr);
3123         encode_sequence(xdr, &args->seq_args, &hdr);
3124         encode_test_stateid(xdr, args, &hdr);
3125         encode_nops(&hdr);
3126 }
3127
3128 /*
3129  *  Encode FREE_STATEID request
3130  */
3131 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3132                                      struct xdr_stream *xdr,
3133                                      const void *data)
3134 {
3135         const struct nfs41_free_stateid_args *args = data;
3136         struct compound_hdr hdr = {
3137                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3138         };
3139
3140         encode_compound_hdr(xdr, req, &hdr);
3141         encode_sequence(xdr, &args->seq_args, &hdr);
3142         encode_free_stateid(xdr, args, &hdr);
3143         encode_nops(&hdr);
3144 }
3145 #endif /* CONFIG_NFS_V4_1 */
3146
3147 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3148 {
3149         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3150                         NFS4_OPAQUE_LIMIT);
3151         if (unlikely(ret < 0))
3152                 return -EIO;
3153         *len = ret;
3154         return 0;
3155 }
3156
3157 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3158 {
3159         __be32 *p;
3160
3161         p = xdr_inline_decode(xdr, 8);
3162         if (unlikely(!p))
3163                 return -EIO;
3164         hdr->status = be32_to_cpup(p++);
3165         hdr->taglen = be32_to_cpup(p);
3166
3167         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3168         if (unlikely(!p))
3169                 return -EIO;
3170         hdr->tag = (char *)p;
3171         p += XDR_QUADLEN(hdr->taglen);
3172         hdr->nops = be32_to_cpup(p);
3173         if (unlikely(hdr->nops < 1))
3174                 return nfs4_stat_to_errno(hdr->status);
3175         return 0;
3176 }
3177
3178 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3179                 int *nfs_retval)
3180 {
3181         __be32 *p;
3182         uint32_t opnum;
3183         int32_t nfserr;
3184
3185         p = xdr_inline_decode(xdr, 8);
3186         if (unlikely(!p))
3187                 goto out_overflow;
3188         opnum = be32_to_cpup(p++);
3189         if (unlikely(opnum != expected))
3190                 goto out_bad_operation;
3191         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3192                 goto out_status;
3193         *nfs_retval = 0;
3194         return true;
3195 out_status:
3196         nfserr = be32_to_cpup(p);
3197         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3198         *nfs_retval = nfs4_stat_to_errno(nfserr);
3199         return true;
3200 out_bad_operation:
3201         dprintk("nfs: Server returned operation"
3202                 " %d but we issued a request for %d\n",
3203                         opnum, expected);
3204         *nfs_retval = -EREMOTEIO;
3205         return false;
3206 out_overflow:
3207         *nfs_retval = -EIO;
3208         return false;
3209 }
3210
3211 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3212 {
3213         int retval;
3214
3215         __decode_op_hdr(xdr, expected, &retval);
3216         return retval;
3217 }
3218
3219 /* Dummy routine */
3220 static int decode_ace(struct xdr_stream *xdr, void *ace)
3221 {
3222         __be32 *p;
3223         unsigned int strlen;
3224         char *str;
3225
3226         p = xdr_inline_decode(xdr, 12);
3227         if (unlikely(!p))
3228                 return -EIO;
3229         return decode_opaque_inline(xdr, &strlen, &str);
3230 }
3231
3232 static ssize_t
3233 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3234 {
3235         ssize_t ret;
3236
3237         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3238         if (likely(ret >= 0))
3239                 return ret;
3240         if (ret != -EMSGSIZE)
3241                 return -EIO;
3242         return sz;
3243 }
3244
3245 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3246 {
3247         ssize_t ret;
3248         ret = decode_bitmap4(xdr, bitmap, 3);
3249         return ret < 0 ? ret : 0;
3250 }
3251
3252 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3253 {
3254         __be32 *p;
3255
3256         p = xdr_inline_decode(xdr, 4);
3257         if (unlikely(!p))
3258                 return -EIO;
3259         *attrlen = be32_to_cpup(p);
3260         *savep = xdr_stream_pos(xdr);
3261         return 0;
3262 }
3263
3264 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3265 {
3266         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3267                 int ret;
3268                 ret = decode_attr_bitmap(xdr, bitmask);
3269                 if (unlikely(ret < 0))
3270                         return ret;
3271                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3272         } else
3273                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3274         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3275                 bitmask[0], bitmask[1], bitmask[2]);
3276         return 0;
3277 }
3278
3279 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3280 {
3281         __be32 *p;
3282         int ret = 0;
3283
3284         *type = 0;
3285         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3286                 return -EIO;
3287         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3288                 p = xdr_inline_decode(xdr, 4);
3289                 if (unlikely(!p))
3290                         return -EIO;
3291                 *type = be32_to_cpup(p);
3292                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3293                         dprintk("%s: bad type %d\n", __func__, *type);
3294                         return -EIO;
3295                 }
3296                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3297                 ret = NFS_ATTR_FATTR_TYPE;
3298         }
3299         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3300         return ret;
3301 }
3302
3303 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3304                                       uint32_t *bitmap, uint32_t *type)
3305 {
3306         __be32 *p;
3307
3308         *type = 0;
3309         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3310                 return -EIO;
3311         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3312                 p = xdr_inline_decode(xdr, 4);
3313                 if (unlikely(!p))
3314                         return -EIO;
3315                 *type = be32_to_cpup(p);
3316                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3317         }
3318         dprintk("%s: expire type=0x%x\n", __func__, *type);
3319         return 0;
3320 }
3321
3322 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3323 {
3324         __be32 *p;
3325         int ret = 0;
3326
3327         *change = 0;
3328         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3329                 return -EIO;
3330         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3331                 p = xdr_inline_decode(xdr, 8);
3332                 if (unlikely(!p))
3333                         return -EIO;
3334                 xdr_decode_hyper(p, change);
3335                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3336                 ret = NFS_ATTR_FATTR_CHANGE;
3337         }
3338         dprintk("%s: change attribute=%Lu\n", __func__,
3339                         (unsigned long long)*change);
3340         return ret;
3341 }
3342
3343 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3344 {
3345         __be32 *p;
3346         int ret = 0;
3347
3348         *size = 0;
3349         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3350                 return -EIO;
3351         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3352                 p = xdr_inline_decode(xdr, 8);
3353                 if (unlikely(!p))
3354                         return -EIO;
3355                 xdr_decode_hyper(p, size);
3356                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3357                 ret = NFS_ATTR_FATTR_SIZE;
3358         }
3359         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3360         return ret;
3361 }
3362
3363 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3364 {
3365         __be32 *p;
3366
3367         *res = 0;
3368         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3369                 return -EIO;
3370         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3371                 p = xdr_inline_decode(xdr, 4);
3372                 if (unlikely(!p))
3373                         return -EIO;
3374                 *res = be32_to_cpup(p);
3375                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3376         }
3377         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3378         return 0;
3379 }
3380
3381 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3382 {
3383         __be32 *p;
3384
3385         *res = 0;
3386         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3387                 return -EIO;
3388         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3389                 p = xdr_inline_decode(xdr, 4);
3390                 if (unlikely(!p))
3391                         return -EIO;
3392                 *res = be32_to_cpup(p);
3393                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3394         }
3395         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3396         return 0;
3397 }
3398
3399 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3400 {
3401         __be32 *p;
3402         int ret = 0;
3403
3404         fsid->major = 0;
3405         fsid->minor = 0;
3406         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3407                 return -EIO;
3408         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3409                 p = xdr_inline_decode(xdr, 16);
3410                 if (unlikely(!p))
3411                         return -EIO;
3412                 p = xdr_decode_hyper(p, &fsid->major);
3413                 xdr_decode_hyper(p, &fsid->minor);
3414                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3415                 ret = NFS_ATTR_FATTR_FSID;
3416         }
3417         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3418                         (unsigned long long)fsid->major,
3419                         (unsigned long long)fsid->minor);
3420         return ret;
3421 }
3422
3423 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3424 {
3425         __be32 *p;
3426
3427         *res = 60;
3428         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3429                 return -EIO;
3430         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3431                 p = xdr_inline_decode(xdr, 4);
3432                 if (unlikely(!p))
3433                         return -EIO;
3434                 *res = be32_to_cpup(p);
3435                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3436         }
3437         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3438         return 0;
3439 }
3440
3441 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3442 {
3443         __be32 *p;
3444
3445         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3446                 return -EIO;
3447         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3448                 p = xdr_inline_decode(xdr, 4);
3449                 if (unlikely(!p))
3450                         return -EIO;
3451                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3452                 *res = -be32_to_cpup(p);
3453         }
3454         return 0;
3455 }
3456
3457 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3458                                  uint32_t *bitmap, uint32_t *bitmask)
3459 {
3460         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3461                 int ret;
3462                 ret = decode_attr_bitmap(xdr, bitmask);
3463                 if (unlikely(ret < 0))
3464                         return ret;
3465                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3466         } else
3467                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3468         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3469                 bitmask[0], bitmask[1], bitmask[2]);
3470         return 0;
3471 }
3472
3473 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3474 {
3475         __be32 *p;
3476         u32 len;
3477
3478         if (fh != NULL)
3479                 memset(fh, 0, sizeof(*fh));
3480
3481         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3482                 return -EIO;
3483         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3484                 p = xdr_inline_decode(xdr, 4);
3485                 if (unlikely(!p))
3486                         return -EIO;
3487                 len = be32_to_cpup(p);
3488                 if (len > NFS4_FHSIZE)
3489                         return -EIO;
3490                 p = xdr_inline_decode(xdr, len);
3491                 if (unlikely(!p))
3492                         return -EIO;
3493                 if (fh != NULL) {
3494                         memcpy(fh->data, p, len);
3495                         fh->size = len;
3496                 }
3497                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3498         }
3499         return 0;
3500 }
3501
3502 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3503 {
3504         __be32 *p;
3505
3506         *res = 0;
3507         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3508                 return -EIO;
3509         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3510                 p = xdr_inline_decode(xdr, 4);
3511                 if (unlikely(!p))
3512                         return -EIO;
3513                 *res = be32_to_cpup(p);
3514                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3515         }
3516         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3517         return 0;
3518 }
3519
3520 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3521 {
3522         __be32 *p;
3523         int ret = 0;
3524
3525         *fileid = 0;
3526         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3527                 return -EIO;
3528         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3529                 p = xdr_inline_decode(xdr, 8);
3530                 if (unlikely(!p))
3531                         return -EIO;
3532                 xdr_decode_hyper(p, fileid);
3533                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3534                 ret = NFS_ATTR_FATTR_FILEID;
3535         }
3536         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3537         return ret;
3538 }
3539
3540 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3541 {
3542         __be32 *p;
3543         int ret = 0;
3544
3545         *fileid = 0;
3546         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3547                 return -EIO;
3548         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3549                 p = xdr_inline_decode(xdr, 8);
3550                 if (unlikely(!p))
3551                         return -EIO;
3552                 xdr_decode_hyper(p, fileid);
3553                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3554                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3555         }
3556         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3557         return ret;
3558 }
3559
3560 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3561 {
3562         __be32 *p;
3563         int status = 0;
3564
3565         *res = 0;
3566         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3567                 return -EIO;
3568         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3569                 p = xdr_inline_decode(xdr, 8);
3570                 if (unlikely(!p))
3571                         return -EIO;
3572                 xdr_decode_hyper(p, res);
3573                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3574         }
3575         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3576         return status;
3577 }
3578
3579 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3580 {
3581         __be32 *p;
3582         int status = 0;
3583
3584         *res = 0;
3585         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3586                 return -EIO;
3587         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3588                 p = xdr_inline_decode(xdr, 8);
3589                 if (unlikely(!p))
3590                         return -EIO;
3591                 xdr_decode_hyper(p, res);
3592                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3593         }
3594         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3595         return status;
3596 }
3597
3598 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3599 {
3600         __be32 *p;
3601         int status = 0;
3602
3603         *res = 0;
3604         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3605                 return -EIO;
3606         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3607                 p = xdr_inline_decode(xdr, 8);
3608                 if (unlikely(!p))
3609                         return -EIO;
3610                 xdr_decode_hyper(p, res);
3611                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3612         }
3613         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3614         return status;
3615 }
3616
3617 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3618 {
3619         u32 n;
3620         __be32 *p;
3621         int status = 0;
3622
3623         p = xdr_inline_decode(xdr, 4);
3624         if (unlikely(!p))
3625                 return -EIO;
3626         n = be32_to_cpup(p);
3627         if (n == 0)
3628                 goto root_path;
3629         dprintk("pathname4: ");
3630         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3631                 dprintk("cannot parse %d components in path\n", n);
3632                 goto out_eio;
3633         }
3634         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3635                 struct nfs4_string *component = &path->components[path->ncomponents];
3636                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3637                 if (unlikely(status != 0))
3638                         goto out_eio;
3639                 ifdebug (XDR)
3640                         pr_cont("%s%.*s ",
3641                                 (path->ncomponents != n ? "/ " : ""),
3642                                 component->len, component->data);
3643         }
3644 out:
3645         return status;
3646 root_path:
3647 /* a root pathname is sent as a zero component4 */
3648         path->ncomponents = 1;
3649         path->components[0].len=0;
3650         path->components[0].data=NULL;
3651         dprintk("pathname4: /\n");
3652         goto out;
3653 out_eio:
3654         dprintk(" status %d", status);
3655         status = -EIO;
3656         goto out;
3657 }
3658
3659 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3660 {
3661         int n;
3662         __be32 *p;
3663         int status = -EIO;
3664
3665         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3666                 goto out;
3667         status = 0;
3668         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3669                 goto out;
3670         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3671         status = -EIO;
3672         /* Ignore borken servers that return unrequested attrs */
3673         if (unlikely(res == NULL))
3674                 goto out;
3675         dprintk("%s: fsroot:\n", __func__);
3676         status = decode_pathname(xdr, &res->fs_path);
3677         if (unlikely(status != 0))
3678                 goto out;
3679         p = xdr_inline_decode(xdr, 4);
3680         if (unlikely(!p))
3681                 goto out_eio;
3682         n = be32_to_cpup(p);
3683         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3684                 u32 m;
3685                 struct nfs4_fs_location *loc;
3686
3687                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3688                         break;
3689                 loc = &res->locations[res->nlocations];
3690                 p = xdr_inline_decode(xdr, 4);
3691                 if (unlikely(!p))
3692                         goto out_eio;
3693                 m = be32_to_cpup(p);
3694
3695                 dprintk("%s: servers:\n", __func__);
3696                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3697                         struct nfs4_string *server;
3698
3699                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3700                                 unsigned int i;
3701                                 dprintk("%s: using first %u of %u servers "
3702                                         "returned for location %u\n",
3703                                                 __func__,
3704                                                 NFS4_FS_LOCATION_MAXSERVERS,
3705                                                 m, res->nlocations);
3706                                 for (i = loc->nservers; i < m; i++) {
3707                                         unsigned int len;
3708                                         char *data;
3709                                         status = decode_opaque_inline(xdr, &len, &data);
3710                                         if (unlikely(status != 0))
3711                                                 goto out_eio;
3712                                 }
3713                                 break;
3714                         }
3715                         server = &loc->servers[loc->nservers];
3716                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3717                         if (unlikely(status != 0))
3718                                 goto out_eio;
3719                         dprintk("%s ", server->data);
3720                 }
3721                 status = decode_pathname(xdr, &loc->rootpath);
3722                 if (unlikely(status != 0))
3723                         goto out_eio;
3724         }
3725         if (res->nlocations != 0)
3726                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3727 out:
3728         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3729         return status;
3730 out_eio:
3731         status = -EIO;
3732         goto out;
3733 }
3734
3735 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3736 {
3737         __be32 *p;
3738         int status = 0;
3739
3740         *res = 0;
3741         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3742                 return -EIO;
3743         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3744                 p = xdr_inline_decode(xdr, 8);
3745                 if (unlikely(!p))
3746                         return -EIO;
3747                 xdr_decode_hyper(p, res);
3748                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3749         }
3750         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3751         return status;
3752 }
3753
3754 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3755 {
3756         __be32 *p;
3757         int status = 0;
3758
3759         *maxlink = 1;
3760         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3761                 return -EIO;
3762         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3763                 p = xdr_inline_decode(xdr, 4);
3764                 if (unlikely(!p))
3765                         return -EIO;
3766                 *maxlink = be32_to_cpup(p);
3767                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3768         }
3769         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3770         return status;
3771 }
3772
3773 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3774 {
3775         __be32 *p;
3776         int status = 0;
3777
3778         *maxname = 1024;
3779         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3780                 return -EIO;
3781         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3782                 p = xdr_inline_decode(xdr, 4);
3783                 if (unlikely(!p))
3784                         return -EIO;
3785                 *maxname = be32_to_cpup(p);
3786                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3787         }
3788         dprintk("%s: maxname=%u\n", __func__, *maxname);
3789         return status;
3790 }
3791
3792 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3793 {
3794         __be32 *p;
3795         int status = 0;
3796
3797         *res = 1024;
3798         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3799                 return -EIO;
3800         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3801                 uint64_t maxread;
3802                 p = xdr_inline_decode(xdr, 8);
3803                 if (unlikely(!p))
3804                         return -EIO;
3805                 xdr_decode_hyper(p, &maxread);
3806                 if (maxread > 0x7FFFFFFF)
3807                         maxread = 0x7FFFFFFF;
3808                 *res = (uint32_t)maxread;
3809                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3810         }
3811         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3812         return status;
3813 }
3814
3815 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3816 {
3817         __be32 *p;
3818         int status = 0;
3819
3820         *res = 1024;
3821         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3822                 return -EIO;
3823         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3824                 uint64_t maxwrite;
3825                 p = xdr_inline_decode(xdr, 8);
3826                 if (unlikely(!p))
3827                         return -EIO;
3828                 xdr_decode_hyper(p, &maxwrite);
3829                 if (maxwrite > 0x7FFFFFFF)
3830                         maxwrite = 0x7FFFFFFF;
3831                 *res = (uint32_t)maxwrite;
3832                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3833         }
3834         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3835         return status;
3836 }
3837
3838 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3839 {
3840         uint32_t tmp;
3841         __be32 *p;
3842         int ret = 0;
3843
3844         *mode = 0;
3845         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3846                 return -EIO;
3847         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3848                 p = xdr_inline_decode(xdr, 4);
3849                 if (unlikely(!p))
3850                         return -EIO;
3851                 tmp = be32_to_cpup(p);
3852                 *mode = tmp & ~S_IFMT;
3853                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3854                 ret = NFS_ATTR_FATTR_MODE;
3855         }
3856         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3857         return ret;
3858 }
3859
3860 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3861 {
3862         __be32 *p;
3863         int ret = 0;
3864
3865         *nlink = 1;
3866         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3867                 return -EIO;
3868         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3869                 p = xdr_inline_decode(xdr, 4);
3870                 if (unlikely(!p))
3871                         return -EIO;
3872                 *nlink = be32_to_cpup(p);
3873                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3874                 ret = NFS_ATTR_FATTR_NLINK;
3875         }
3876         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3877         return ret;
3878 }
3879
3880 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3881                 struct nfs4_string *name, gfp_t gfp_flags)
3882 {
3883         ssize_t ret;
3884
3885         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3886                         XDR_MAX_NETOBJ, gfp_flags);
3887         name->len = 0;
3888         if (ret > 0)
3889                 name->len = ret;
3890         return ret;
3891 }
3892
3893 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3894                 const struct nfs_server *server, kuid_t *uid,
3895                 struct nfs4_string *owner_name)
3896 {
3897         ssize_t len;
3898         char *p;
3899
3900         *uid = make_kuid(&init_user_ns, -2);
3901         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3902                 return -EIO;
3903         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3904                 return 0;
3905         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3906
3907         if (owner_name != NULL) {
3908                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3909                 if (len <= 0)
3910                         goto out;
3911                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3912                 return NFS_ATTR_FATTR_OWNER_NAME;
3913         } else {
3914                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3915                                 XDR_MAX_NETOBJ);
3916                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3917                         goto out;
3918                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3919                 return NFS_ATTR_FATTR_OWNER;
3920         }
3921 out:
3922         if (len == -EBADMSG)
3923                 return -EIO;
3924         return 0;
3925 }
3926
3927 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3928                 const struct nfs_server *server, kgid_t *gid,
3929                 struct nfs4_string *group_name)
3930 {
3931         ssize_t len;
3932         char *p;
3933
3934         *gid = make_kgid(&init_user_ns, -2);
3935         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3936                 return -EIO;
3937         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3938                 return 0;
3939         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3940
3941         if (group_name != NULL) {
3942                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3943                 if (len <= 0)
3944                         goto out;
3945                 dprintk("%s: name=%s\n", __func__, group_name->data);
3946                 return NFS_ATTR_FATTR_GROUP_NAME;
3947         } else {
3948                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3949                                 XDR_MAX_NETOBJ);
3950                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3951                         goto out;
3952                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3953                 return NFS_ATTR_FATTR_GROUP;
3954         }
3955 out:
3956         if (len == -EBADMSG)
3957                 return -EIO;
3958         return 0;
3959 }
3960
3961 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3962 {
3963         uint32_t major = 0, minor = 0;
3964         __be32 *p;
3965         int ret = 0;
3966
3967         *rdev = MKDEV(0,0);
3968         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3969                 return -EIO;
3970         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3971                 dev_t tmp;
3972
3973                 p = xdr_inline_decode(xdr, 8);
3974                 if (unlikely(!p))
3975                         return -EIO;
3976                 major = be32_to_cpup(p++);
3977                 minor = be32_to_cpup(p);
3978                 tmp = MKDEV(major, minor);
3979                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3980                         *rdev = tmp;
3981                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3982                 ret = NFS_ATTR_FATTR_RDEV;
3983         }
3984         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3985         return ret;
3986 }
3987
3988 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3989 {
3990         __be32 *p;
3991         int status = 0;
3992
3993         *res = 0;
3994         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3995                 return -EIO;
3996         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3997                 p = xdr_inline_decode(xdr, 8);
3998                 if (unlikely(!p))
3999                         return -EIO;
4000                 xdr_decode_hyper(p, res);
4001                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4002         }
4003         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4004         return status;
4005 }
4006
4007 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4008 {
4009         __be32 *p;
4010         int status = 0;
4011
4012         *res = 0;
4013         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4014                 return -EIO;
4015         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4016                 p = xdr_inline_decode(xdr, 8);
4017                 if (unlikely(!p))
4018                         return -EIO;
4019                 xdr_decode_hyper(p, res);
4020                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4021         }
4022         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4023         return status;
4024 }
4025
4026 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4027 {
4028         __be32 *p;
4029         int status = 0;
4030
4031         *res = 0;
4032         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4033                 return -EIO;
4034         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4035                 p = xdr_inline_decode(xdr, 8);
4036                 if (unlikely(!p))
4037                         return -EIO;
4038                 xdr_decode_hyper(p, res);
4039                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4040         }
4041         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4042         return status;
4043 }
4044
4045 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4046 {
4047         __be32 *p;
4048         int ret = 0;
4049
4050         *used = 0;
4051         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4052                 return -EIO;
4053         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4054                 p = xdr_inline_decode(xdr, 8);
4055                 if (unlikely(!p))
4056                         return -EIO;
4057                 xdr_decode_hyper(p, used);
4058                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4059                 ret = NFS_ATTR_FATTR_SPACE_USED;
4060         }
4061         dprintk("%s: space used=%Lu\n", __func__,
4062                         (unsigned long long)*used);
4063         return ret;
4064 }
4065
4066 static __be32 *
4067 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4068 {
4069         __u64 sec;
4070
4071         p = xdr_decode_hyper(p, &sec);
4072         t-> tv_sec = sec;
4073         t->tv_nsec = be32_to_cpup(p++);
4074         return p;
4075 }
4076
4077 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4078 {
4079         __be32 *p;
4080
4081         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4082         if (unlikely(!p))
4083                 return -EIO;
4084         xdr_decode_nfstime4(p, time);
4085         return 0;
4086 }
4087
4088 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4089 {
4090         int status = 0;
4091
4092         time->tv_sec = 0;
4093         time->tv_nsec = 0;
4094         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4095                 return -EIO;
4096         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4097                 status = decode_attr_time(xdr, time);
4098                 if (status == 0)
4099                         status = NFS_ATTR_FATTR_ATIME;
4100                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4101         }
4102         dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4103         return status;
4104 }
4105
4106 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4107 {
4108         int status = 0;
4109
4110         time->tv_sec = 0;
4111         time->tv_nsec = 0;
4112         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4113                 return -EIO;
4114         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4115                 status = decode_attr_time(xdr, time);
4116                 if (status == 0)
4117                         status = NFS_ATTR_FATTR_CTIME;
4118                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4119         }
4120         dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4121         return status;
4122 }
4123
4124 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4125                                   struct timespec64 *time)
4126 {
4127         int status = 0;
4128
4129         time->tv_sec = 0;
4130         time->tv_nsec = 0;
4131         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4132                 return -EIO;
4133         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4134                 status = decode_attr_time(xdr, time);
4135                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4136         }
4137         dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4138                 time->tv_nsec);
4139         return status;
4140 }
4141
4142 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4143                                         struct nfs4_label *label)
4144 {
4145         uint32_t pi = 0;
4146         uint32_t lfs = 0;
4147         __u32 len;
4148         __be32 *p;
4149         int status = 0;
4150
4151         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4152                 return -EIO;
4153         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4154                 p = xdr_inline_decode(xdr, 4);
4155                 if (unlikely(!p))
4156                         return -EIO;
4157                 lfs = be32_to_cpup(p++);
4158                 p = xdr_inline_decode(xdr, 4);
4159                 if (unlikely(!p))
4160                         return -EIO;
4161                 pi = be32_to_cpup(p++);
4162                 p = xdr_inline_decode(xdr, 4);
4163                 if (unlikely(!p))
4164                         return -EIO;
4165                 len = be32_to_cpup(p++);
4166                 p = xdr_inline_decode(xdr, len);
4167                 if (unlikely(!p))
4168                         return -EIO;
4169                 if (len < NFS4_MAXLABELLEN) {
4170                         if (label) {
4171                                 if (label->len) {
4172                                         if (label->len < len)
4173                                                 return -ERANGE;
4174                                         memcpy(label->label, p, len);
4175                                 }
4176                                 label->len = len;
4177                                 label->pi = pi;
4178                                 label->lfs = lfs;
4179                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4180                         }
4181                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4182                 } else
4183                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4184                                         __func__, len);
4185                 if (label && label->label)
4186                         dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n",
4187                                 __func__, label->len, (char *)label->label,
4188                                 label->len, label->pi, label->lfs);
4189         }
4190         return status;
4191 }
4192
4193 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4194 {
4195         int status = 0;
4196
4197         time->tv_sec = 0;
4198         time->tv_nsec = 0;
4199         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4200                 return -EIO;
4201         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4202                 status = decode_attr_time(xdr, time);
4203                 if (status == 0)
4204                         status = NFS_ATTR_FATTR_MTIME;
4205                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4206         }
4207         dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4208         return status;
4209 }
4210
4211 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4212                                     uint32_t *res)
4213 {
4214         __be32 *p;
4215
4216         *res = 0;
4217         if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4218                 return -EIO;
4219         if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4220                 p = xdr_inline_decode(xdr, 4);
4221                 if (unlikely(!p))
4222                         return -EIO;
4223                 *res = be32_to_cpup(p);
4224                 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4225         }
4226         dprintk("%s: XATTR support=%s\n", __func__,
4227                 *res == 0 ? "false" : "true");
4228         return 0;
4229 }
4230
4231 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4232 {
4233         unsigned int attrwords = XDR_QUADLEN(attrlen);
4234         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4235
4236         if (unlikely(attrwords != nwords)) {
4237                 dprintk("%s: server returned incorrect attribute length: "
4238                         "%u %c %u\n",
4239                                 __func__,
4240                                 attrwords << 2,
4241                                 (attrwords < nwords) ? '<' : '>',
4242                                 nwords << 2);
4243                 return -EIO;
4244         }
4245         return 0;
4246 }
4247
4248 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4249 {
4250         __be32 *p;
4251
4252         p = xdr_inline_decode(xdr, 20);
4253         if (unlikely(!p))
4254                 return -EIO;
4255         cinfo->atomic = be32_to_cpup(p++);
4256         p = xdr_decode_hyper(p, &cinfo->before);
4257         xdr_decode_hyper(p, &cinfo->after);
4258         return 0;
4259 }
4260
4261 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4262 {
4263         __be32 *p;
4264         uint32_t supp, acc;
4265         int status;
4266
4267         status = decode_op_hdr(xdr, OP_ACCESS);
4268         if (status)
4269                 return status;
4270         p = xdr_inline_decode(xdr, 8);
4271         if (unlikely(!p))
4272                 return -EIO;
4273         supp = be32_to_cpup(p++);
4274         acc = be32_to_cpup(p);
4275         *supported = supp;
4276         *access = acc;
4277         return 0;
4278 }
4279
4280 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4281 {
4282         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4283         if (unlikely(ret < 0))
4284                 return -EIO;
4285         return 0;
4286 }
4287
4288 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4289 {
4290         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4291 }
4292
4293 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4294 {
4295         stateid->type = NFS4_OPEN_STATEID_TYPE;
4296         return decode_stateid(xdr, stateid);
4297 }
4298
4299 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4300 {
4301         stateid->type = NFS4_LOCK_STATEID_TYPE;
4302         return decode_stateid(xdr, stateid);
4303 }
4304
4305 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4306 {
4307         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4308         return decode_stateid(xdr, stateid);
4309 }
4310
4311 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4312 {
4313         nfs4_stateid dummy;
4314
4315         nfs4_stateid_copy(stateid, &invalid_stateid);
4316         return decode_stateid(xdr, &dummy);
4317 }
4318
4319 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4320 {
4321         int status;
4322
4323         status = decode_op_hdr(xdr, OP_CLOSE);
4324         if (status != -EIO)
4325                 nfs_increment_open_seqid(status, res->seqid);
4326         if (!status)
4327                 status = decode_invalid_stateid(xdr, &res->stateid);
4328         return status;
4329 }
4330
4331 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4332 {
4333         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4334 }
4335
4336 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4337 {
4338         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4339 }
4340
4341 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4342 {
4343         struct nfs_writeverf *verf = res->verf;
4344         int status;
4345
4346         status = decode_op_hdr(xdr, OP_COMMIT);
4347         if (!status)
4348                 status = decode_write_verifier(xdr, &verf->verifier);
4349         if (!status)
4350                 verf->committed = NFS_FILE_SYNC;
4351         return status;
4352 }
4353
4354 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4355 {
4356         __be32 *p;
4357         uint32_t bmlen;
4358         int status;
4359
4360         status = decode_op_hdr(xdr, OP_CREATE);
4361         if (status)
4362                 return status;
4363         if ((status = decode_change_info(xdr, cinfo)))
4364                 return status;
4365         p = xdr_inline_decode(xdr, 4);
4366         if (unlikely(!p))
4367                 return -EIO;
4368         bmlen = be32_to_cpup(p);
4369         p = xdr_inline_decode(xdr, bmlen << 2);
4370         if (likely(p))
4371                 return 0;
4372         return -EIO;
4373 }
4374
4375 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4376 {
4377         unsigned int savep;
4378         uint32_t attrlen, bitmap[3] = {0};
4379         int status;
4380
4381         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4382                 goto xdr_error;
4383         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4384                 goto xdr_error;
4385         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4386                 goto xdr_error;
4387         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4388                 goto xdr_error;
4389         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4390                                                  &res->fh_expire_type)) != 0)
4391                 goto xdr_error;
4392         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4393                 goto xdr_error;
4394         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4395                 goto xdr_error;
4396         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4397                 goto xdr_error;
4398         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4399                                 res->exclcreat_bitmask)) != 0)
4400                 goto xdr_error;
4401         status = verify_attr_len(xdr, savep, attrlen);
4402 xdr_error:
4403         dprintk("%s: xdr returned %d!\n", __func__, -status);
4404         return status;
4405 }
4406
4407 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4408 {
4409         unsigned int savep;
4410         uint32_t attrlen, bitmap[3] = {0};
4411         int status;
4412
4413         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4414                 goto xdr_error;
4415         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4416                 goto xdr_error;
4417         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4418                 goto xdr_error;
4419
4420         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4421                 goto xdr_error;
4422         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4423                 goto xdr_error;
4424         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4425                 goto xdr_error;
4426
4427         status = -EIO;
4428         if (unlikely(bitmap[0]))
4429                 goto xdr_error;
4430
4431         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4432                 goto xdr_error;
4433         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4434                 goto xdr_error;
4435         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4436                 goto xdr_error;
4437
4438         status = verify_attr_len(xdr, savep, attrlen);
4439 xdr_error:
4440         dprintk("%s: xdr returned %d!\n", __func__, -status);
4441         return status;
4442 }
4443
4444 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4445 {
4446         unsigned int savep;
4447         uint32_t attrlen, bitmap[3] = {0};
4448         int status;
4449
4450         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4451                 goto xdr_error;
4452         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4453                 goto xdr_error;
4454         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4455                 goto xdr_error;
4456
4457         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4458                 goto xdr_error;
4459         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4460                 goto xdr_error;
4461
4462         status = verify_attr_len(xdr, savep, attrlen);
4463 xdr_error:
4464         dprintk("%s: xdr returned %d!\n", __func__, -status);
4465         return status;
4466 }
4467
4468 static int decode_threshold_hint(struct xdr_stream *xdr,
4469                                   uint32_t *bitmap,
4470                                   uint64_t *res,
4471                                   uint32_t hint_bit)
4472 {
4473         __be32 *p;
4474
4475         *res = 0;
4476         if (likely(bitmap[0] & hint_bit)) {
4477                 p = xdr_inline_decode(xdr, 8);
4478                 if (unlikely(!p))
4479                         return -EIO;
4480                 xdr_decode_hyper(p, res);
4481         }
4482         return 0;
4483 }
4484
4485 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4486                                         struct nfs4_threshold *res)
4487 {
4488         __be32 *p;
4489         unsigned int savep;
4490         uint32_t bitmap[3] = {0,}, attrlen;
4491         int status;
4492
4493         /* layout type */
4494         p = xdr_inline_decode(xdr, 4);
4495         if (unlikely(!p))
4496                 return -EIO;
4497         res->l_type = be32_to_cpup(p);
4498
4499         /* thi_hintset bitmap */
4500         status = decode_attr_bitmap(xdr, bitmap);
4501         if (status < 0)
4502                 goto xdr_error;
4503
4504         /* thi_hintlist length */
4505         status = decode_attr_length(xdr, &attrlen, &savep);
4506         if (status < 0)
4507                 goto xdr_error;
4508         /* thi_hintlist */
4509         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4510         if (status < 0)
4511                 goto xdr_error;
4512         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4513         if (status < 0)
4514                 goto xdr_error;
4515         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4516                                        THRESHOLD_RD_IO);
4517         if (status < 0)
4518                 goto xdr_error;
4519         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4520                                        THRESHOLD_WR_IO);
4521         if (status < 0)
4522                 goto xdr_error;
4523
4524         status = verify_attr_len(xdr, savep, attrlen);
4525         res->bm = bitmap[0];
4526
4527         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4528                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4529                 res->wr_io_sz);
4530 xdr_error:
4531         dprintk("%s ret=%d!\n", __func__, status);
4532         return status;
4533 }
4534
4535 /*
4536  * Thresholds on pNFS direct I/O vrs MDS I/O
4537  */
4538 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4539                                     uint32_t *bitmap,
4540                                     struct nfs4_threshold *res)
4541 {
4542         __be32 *p;
4543         int status = 0;
4544         uint32_t num;
4545
4546         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4547                 return -EIO;
4548         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4549                 /* Did the server return an unrequested attribute? */
4550                 if (unlikely(res == NULL))
4551                         return -EREMOTEIO;
4552                 p = xdr_inline_decode(xdr, 4);
4553                 if (unlikely(!p))
4554                         return -EIO;
4555                 num = be32_to_cpup(p);
4556                 if (num == 0)
4557                         return 0;
4558                 if (num > 1)
4559                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4560                                 "drivers per filesystem not supported\n",
4561                                 __func__);
4562
4563                 status = decode_first_threshold_item4(xdr, res);
4564                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4565         }
4566         return status;
4567 }
4568
4569 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4570                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4571                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4572                 const struct nfs_server *server)
4573 {
4574         int status;
4575         umode_t fmode = 0;
4576         uint32_t type;
4577         int32_t err;
4578
4579         status = decode_attr_type(xdr, bitmap, &type);
4580         if (status < 0)
4581                 goto xdr_error;
4582         fattr->mode = 0;
4583         if (status != 0) {
4584                 fattr->mode |= nfs_type2fmt[type];
4585                 fattr->valid |= status;
4586         }
4587
4588         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4589         if (status < 0)
4590                 goto xdr_error;
4591         fattr->valid |= status;
4592
4593         status = decode_attr_size(xdr, bitmap, &fattr->size);
4594         if (status < 0)
4595                 goto xdr_error;
4596         fattr->valid |= status;
4597
4598         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4599         if (status < 0)
4600                 goto xdr_error;
4601         fattr->valid |= status;
4602
4603         err = 0;
4604         status = decode_attr_error(xdr, bitmap, &err);
4605         if (status < 0)
4606                 goto xdr_error;
4607
4608         status = decode_attr_filehandle(xdr, bitmap, fh);
4609         if (status < 0)
4610                 goto xdr_error;
4611
4612         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4613         if (status < 0)
4614                 goto xdr_error;
4615         fattr->valid |= status;
4616
4617         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4618         if (status < 0)
4619                 goto xdr_error;
4620         fattr->valid |= status;
4621
4622         status = -EIO;
4623         if (unlikely(bitmap[0]))
4624                 goto xdr_error;
4625
4626         status = decode_attr_mode(xdr, bitmap, &fmode);
4627         if (status < 0)
4628                 goto xdr_error;
4629         if (status != 0) {
4630                 fattr->mode |= fmode;
4631                 fattr->valid |= status;
4632         }
4633
4634         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4635         if (status < 0)
4636                 goto xdr_error;
4637         fattr->valid |= status;
4638
4639         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4640         if (status < 0)
4641                 goto xdr_error;
4642         fattr->valid |= status;
4643
4644         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4645         if (status < 0)
4646                 goto xdr_error;
4647         fattr->valid |= status;
4648
4649         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4650         if (status < 0)
4651                 goto xdr_error;
4652         fattr->valid |= status;
4653
4654         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4655         if (status < 0)
4656                 goto xdr_error;
4657         fattr->valid |= status;
4658
4659         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4660         if (status < 0)
4661                 goto xdr_error;
4662         fattr->valid |= status;
4663
4664         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4665         if (status < 0)
4666                 goto xdr_error;
4667         fattr->valid |= status;
4668
4669         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4670         if (status < 0)
4671                 goto xdr_error;
4672         fattr->valid |= status;
4673
4674         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4675         if (status < 0)
4676                 goto xdr_error;
4677         fattr->valid |= status;
4678
4679         status = -EIO;
4680         if (unlikely(bitmap[1]))
4681                 goto xdr_error;
4682
4683         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4684         if (status < 0)
4685                 goto xdr_error;
4686
4687         if (label) {
4688                 status = decode_attr_security_label(xdr, bitmap, label);
4689                 if (status < 0)
4690                         goto xdr_error;
4691                 fattr->valid |= status;
4692         }
4693
4694 xdr_error:
4695         dprintk("%s: xdr returned %d\n", __func__, -status);
4696         return status;
4697 }
4698
4699 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4700                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4701                 struct nfs4_label *label, const struct nfs_server *server)
4702 {
4703         unsigned int savep;
4704         uint32_t attrlen,
4705                  bitmap[3] = {0};
4706         int status;
4707
4708         status = decode_op_hdr(xdr, OP_GETATTR);
4709         if (status < 0)
4710                 goto xdr_error;
4711
4712         status = decode_attr_bitmap(xdr, bitmap);
4713         if (status < 0)
4714                 goto xdr_error;
4715
4716         status = decode_attr_length(xdr, &attrlen, &savep);
4717         if (status < 0)
4718                 goto xdr_error;
4719
4720         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4721                                         label, server);
4722         if (status < 0)
4723                 goto xdr_error;
4724
4725         status = verify_attr_len(xdr, savep, attrlen);
4726 xdr_error:
4727         dprintk("%s: xdr returned %d\n", __func__, -status);
4728         return status;
4729 }
4730
4731 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4732                 struct nfs4_label *label, const struct nfs_server *server)
4733 {
4734         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4735 }
4736
4737 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4738                 const struct nfs_server *server)
4739 {
4740         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4741 }
4742
4743 /*
4744  * Decode potentially multiple layout types.
4745  */
4746 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4747                                     struct nfs_fsinfo *fsinfo)
4748 {
4749         __be32 *p;
4750         uint32_t i;
4751
4752         p = xdr_inline_decode(xdr, 4);
4753         if (unlikely(!p))
4754                 return -EIO;
4755         fsinfo->nlayouttypes = be32_to_cpup(p);
4756
4757         /* pNFS is not supported by the underlying file system */
4758         if (fsinfo->nlayouttypes == 0)
4759                 return 0;
4760
4761         /* Decode and set first layout type, move xdr->p past unused types */
4762         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4763         if (unlikely(!p))
4764                 return -EIO;
4765
4766         /* If we get too many, then just cap it at the max */
4767         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4768                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4769                         __func__, fsinfo->nlayouttypes);
4770                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4771         }
4772
4773         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4774                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4775         return 0;
4776 }
4777
4778 /*
4779  * The type of file system exported.
4780  * Note we must ensure that layouttype is set in any non-error case.
4781  */
4782 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4783                                 struct nfs_fsinfo *fsinfo)
4784 {
4785         int status = 0;
4786
4787         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4788         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4789                 return -EIO;
4790         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4791                 status = decode_pnfs_layout_types(xdr, fsinfo);
4792                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4793         }
4794         return status;
4795 }
4796
4797 /*
4798  * The prefered block size for layout directed io
4799  */
4800 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4801                                       uint32_t *res)
4802 {
4803         __be32 *p;
4804
4805         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4806         *res = 0;
4807         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4808                 p = xdr_inline_decode(xdr, 4);
4809                 if (unlikely(!p))
4810                         return -EIO;
4811                 *res = be32_to_cpup(p);
4812                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4813         }
4814         return 0;
4815 }
4816
4817 /*
4818  * The granularity of a CLONE operation.
4819  */
4820 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4821                                      uint32_t *res)
4822 {
4823         __be32 *p;
4824
4825         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4826         *res = 0;
4827         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4828                 p = xdr_inline_decode(xdr, 4);
4829                 if (unlikely(!p))
4830                         return -EIO;
4831                 *res = be32_to_cpup(p);
4832                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4833         }
4834         return 0;
4835 }
4836
4837 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4838 {
4839         unsigned int savep;
4840         uint32_t attrlen, bitmap[3];
4841         int status;
4842
4843         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4844                 goto xdr_error;
4845         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4846                 goto xdr_error;
4847         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4848                 goto xdr_error;
4849
4850         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4851
4852         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4853                 goto xdr_error;
4854         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4855                 goto xdr_error;
4856         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4857                 goto xdr_error;
4858         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4859         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4860                 goto xdr_error;
4861         fsinfo->wtpref = fsinfo->wtmax;
4862
4863         status = -EIO;
4864         if (unlikely(bitmap[0]))
4865                 goto xdr_error;
4866
4867         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4868         if (status != 0)
4869                 goto xdr_error;
4870         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4871         if (status != 0)
4872                 goto xdr_error;
4873
4874         status = -EIO;
4875         if (unlikely(bitmap[1]))
4876                 goto xdr_error;
4877
4878         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4879         if (status)
4880                 goto xdr_error;
4881         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4882         if (status)
4883                 goto xdr_error;
4884
4885         status = decode_attr_xattrsupport(xdr, bitmap,
4886                                           &fsinfo->xattr_support);
4887         if (status)
4888                 goto xdr_error;
4889
4890         status = verify_attr_len(xdr, savep, attrlen);
4891 xdr_error:
4892         dprintk("%s: xdr returned %d!\n", __func__, -status);
4893         return status;
4894 }
4895
4896 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4897 {
4898         __be32 *p;
4899         uint32_t len;
4900         int status;
4901
4902         /* Zero handle first to allow comparisons */
4903         memset(fh, 0, sizeof(*fh));
4904
4905         status = decode_op_hdr(xdr, OP_GETFH);
4906         if (status)
4907                 return status;
4908
4909         p = xdr_inline_decode(xdr, 4);
4910         if (unlikely(!p))
4911                 return -EIO;
4912         len = be32_to_cpup(p);
4913         if (len > NFS4_FHSIZE)
4914                 return -EIO;
4915         fh->size = len;
4916         p = xdr_inline_decode(xdr, len);
4917         if (unlikely(!p))
4918                 return -EIO;
4919         memcpy(fh->data, p, len);
4920         return 0;
4921 }
4922
4923 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4924 {
4925         int status;
4926
4927         status = decode_op_hdr(xdr, OP_LINK);
4928         if (status)
4929                 return status;
4930         return decode_change_info(xdr, cinfo);
4931 }
4932
4933 /*
4934  * We create the owner, so we know a proper owner.id length is 4.
4935  */
4936 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4937 {
4938         uint64_t offset, length, clientid;
4939         __be32 *p;
4940         uint32_t namelen, type;
4941
4942         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4943         if (unlikely(!p))
4944                 return -EIO;
4945         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4946         p = xdr_decode_hyper(p, &length);
4947         type = be32_to_cpup(p++); /* 4 byte read */
4948         if (fl != NULL) { /* manipulate file lock */
4949                 fl->fl_start = (loff_t)offset;
4950                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4951                 if (length == ~(uint64_t)0)
4952                         fl->fl_end = OFFSET_MAX;
4953                 fl->fl_type = F_WRLCK;
4954                 if (type & 1)
4955                         fl->fl_type = F_RDLCK;
4956                 fl->fl_pid = 0;
4957         }
4958         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4959         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4960         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4961         if (likely(!p))
4962                 return -EIO;
4963         return -NFS4ERR_DENIED;
4964 }
4965
4966 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4967 {
4968         int status;
4969
4970         status = decode_op_hdr(xdr, OP_LOCK);
4971         if (status == -EIO)
4972                 goto out;
4973         if (status == 0) {
4974                 status = decode_lock_stateid(xdr, &res->stateid);
4975                 if (unlikely(status))
4976                         goto out;
4977         } else if (status == -NFS4ERR_DENIED)
4978                 status = decode_lock_denied(xdr, NULL);
4979         if (res->open_seqid != NULL)
4980                 nfs_increment_open_seqid(status, res->open_seqid);
4981         nfs_increment_lock_seqid(status, res->lock_seqid);
4982 out:
4983         return status;
4984 }
4985
4986 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4987 {
4988         int status;
4989         status = decode_op_hdr(xdr, OP_LOCKT);
4990         if (status == -NFS4ERR_DENIED)
4991                 return decode_lock_denied(xdr, res->denied);
4992         return status;
4993 }
4994
4995 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4996 {
4997         int status;
4998
4999         status = decode_op_hdr(xdr, OP_LOCKU);
5000         if (status != -EIO)
5001                 nfs_increment_lock_seqid(status, res->seqid);
5002         if (status == 0)
5003                 status = decode_lock_stateid(xdr, &res->stateid);
5004         return status;
5005 }
5006
5007 static int decode_release_lockowner(struct xdr_stream *xdr)
5008 {
5009         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5010 }
5011
5012 static int decode_lookup(struct xdr_stream *xdr)
5013 {
5014         return decode_op_hdr(xdr, OP_LOOKUP);
5015 }
5016
5017 static int decode_lookupp(struct xdr_stream *xdr)
5018 {
5019         return decode_op_hdr(xdr, OP_LOOKUPP);
5020 }
5021
5022 /* This is too sick! */
5023 static int decode_space_limit(struct xdr_stream *xdr,
5024                 unsigned long *pagemod_limit)
5025 {
5026         __be32 *p;
5027         uint32_t limit_type, nblocks, blocksize;
5028         u64 maxsize = 0;
5029
5030         p = xdr_inline_decode(xdr, 12);
5031         if (unlikely(!p))
5032                 return -EIO;
5033         limit_type = be32_to_cpup(p++);
5034         switch (limit_type) {
5035         case NFS4_LIMIT_SIZE:
5036                 xdr_decode_hyper(p, &maxsize);
5037                 break;
5038         case NFS4_LIMIT_BLOCKS:
5039                 nblocks = be32_to_cpup(p++);
5040                 blocksize = be32_to_cpup(p);
5041                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5042         }
5043         maxsize >>= PAGE_SHIFT;
5044         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5045         return 0;
5046 }
5047
5048 static int decode_rw_delegation(struct xdr_stream *xdr,
5049                 uint32_t delegation_type,
5050                 struct nfs_openres *res)
5051 {
5052         __be32 *p;
5053         int status;
5054
5055         status = decode_delegation_stateid(xdr, &res->delegation);
5056         if (unlikely(status))
5057                 return status;
5058         p = xdr_inline_decode(xdr, 4);
5059         if (unlikely(!p))
5060                 return -EIO;
5061         res->do_recall = be32_to_cpup(p);
5062
5063         switch (delegation_type) {
5064         case NFS4_OPEN_DELEGATE_READ:
5065                 res->delegation_type = FMODE_READ;
5066                 break;
5067         case NFS4_OPEN_DELEGATE_WRITE:
5068                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5069                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5070                                 return -EIO;
5071         }
5072         return decode_ace(xdr, NULL);
5073 }
5074
5075 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5076 {
5077         __be32 *p;
5078         uint32_t why_no_delegation;
5079
5080         p = xdr_inline_decode(xdr, 4);
5081         if (unlikely(!p))
5082                 return -EIO;
5083         why_no_delegation = be32_to_cpup(p);
5084         switch (why_no_delegation) {
5085                 case WND4_CONTENTION:
5086                 case WND4_RESOURCE:
5087                         xdr_inline_decode(xdr, 4);
5088                         /* Ignore for now */
5089         }
5090         return 0;
5091 }
5092
5093 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5094 {
5095         __be32 *p;
5096         uint32_t delegation_type;
5097
5098         p = xdr_inline_decode(xdr, 4);
5099         if (unlikely(!p))
5100                 return -EIO;
5101         delegation_type = be32_to_cpup(p);
5102         res->delegation_type = 0;
5103         switch (delegation_type) {
5104         case NFS4_OPEN_DELEGATE_NONE:
5105                 return 0;
5106         case NFS4_OPEN_DELEGATE_READ:
5107         case NFS4_OPEN_DELEGATE_WRITE:
5108                 return decode_rw_delegation(xdr, delegation_type, res);
5109         case NFS4_OPEN_DELEGATE_NONE_EXT:
5110                 return decode_no_delegation(xdr, res);
5111         }
5112         return -EIO;
5113 }
5114
5115 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5116 {
5117         __be32 *p;
5118         uint32_t savewords, bmlen, i;
5119         int status;
5120
5121         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5122                 return status;
5123         nfs_increment_open_seqid(status, res->seqid);
5124         if (status)
5125                 return status;
5126         status = decode_open_stateid(xdr, &res->stateid);
5127         if (unlikely(status))
5128                 return status;
5129
5130         decode_change_info(xdr, &res->cinfo);
5131
5132         p = xdr_inline_decode(xdr, 8);
5133         if (unlikely(!p))
5134                 return -EIO;
5135         res->rflags = be32_to_cpup(p++);
5136         bmlen = be32_to_cpup(p);
5137         if (bmlen > 10)
5138                 goto xdr_error;
5139
5140         p = xdr_inline_decode(xdr, bmlen << 2);
5141         if (unlikely(!p))
5142                 return -EIO;
5143         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5144         for (i = 0; i < savewords; ++i)
5145                 res->attrset[i] = be32_to_cpup(p++);
5146         for (; i < NFS4_BITMAP_SIZE; i++)
5147                 res->attrset[i] = 0;
5148
5149         return decode_delegation(xdr, res);
5150 xdr_error:
5151         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5152         return -EIO;
5153 }
5154
5155 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5156 {
5157         int status;
5158
5159         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5160         if (status != -EIO)
5161                 nfs_increment_open_seqid(status, res->seqid);
5162         if (!status)
5163                 status = decode_open_stateid(xdr, &res->stateid);
5164         return status;
5165 }
5166
5167 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5168 {
5169         int status;
5170
5171         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5172         if (status != -EIO)
5173                 nfs_increment_open_seqid(status, res->seqid);
5174         if (!status)
5175                 status = decode_open_stateid(xdr, &res->stateid);
5176         return status;
5177 }
5178
5179 static int decode_putfh(struct xdr_stream *xdr)
5180 {
5181         return decode_op_hdr(xdr, OP_PUTFH);
5182 }
5183
5184 static int decode_putrootfh(struct xdr_stream *xdr)
5185 {
5186         return decode_op_hdr(xdr, OP_PUTROOTFH);
5187 }
5188
5189 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5190                        struct nfs_pgio_res *res)
5191 {
5192         __be32 *p;
5193         uint32_t count, eof, recvd;
5194         int status;
5195
5196         status = decode_op_hdr(xdr, OP_READ);
5197         if (status)
5198                 return status;
5199         p = xdr_inline_decode(xdr, 8);
5200         if (unlikely(!p))
5201                 return -EIO;
5202         eof = be32_to_cpup(p++);
5203         count = be32_to_cpup(p);
5204         recvd = xdr_read_pages(xdr, count);
5205         if (count > recvd) {
5206                 dprintk("NFS: server cheating in read reply: "
5207                                 "count %u > recvd %u\n", count, recvd);
5208                 count = recvd;
5209                 eof = 0;
5210         }
5211         res->eof = eof;
5212         res->count = count;
5213         return 0;
5214 }
5215
5216 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5217 {
5218         int             status;
5219         __be32          verf[2];
5220
5221         status = decode_op_hdr(xdr, OP_READDIR);
5222         if (!status)
5223                 status = decode_verifier(xdr, readdir->verifier.data);
5224         if (unlikely(status))
5225                 return status;
5226         memcpy(verf, readdir->verifier.data, sizeof(verf));
5227         dprintk("%s: verifier = %08x:%08x\n",
5228                         __func__, verf[0], verf[1]);
5229         return xdr_read_pages(xdr, xdr->buf->page_len);
5230 }
5231
5232 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5233 {
5234         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5235         u32 len, recvd;
5236         __be32 *p;
5237         int status;
5238
5239         status = decode_op_hdr(xdr, OP_READLINK);
5240         if (status)
5241                 return status;
5242
5243         /* Convert length of symlink */
5244         p = xdr_inline_decode(xdr, 4);
5245         if (unlikely(!p))
5246                 return -EIO;
5247         len = be32_to_cpup(p);
5248         if (len >= rcvbuf->page_len || len <= 0) {
5249                 dprintk("nfs: server returned giant symlink!\n");
5250                 return -ENAMETOOLONG;
5251         }
5252         recvd = xdr_read_pages(xdr, len);
5253         if (recvd < len) {
5254                 dprintk("NFS: server cheating in readlink reply: "
5255                                 "count %u > recvd %u\n", len, recvd);
5256                 return -EIO;
5257         }
5258         /*
5259          * The XDR encode routine has set things up so that
5260          * the link text will be copied directly into the
5261          * buffer.  We just have to do overflow-checking,
5262          * and null-terminate the text (the VFS expects
5263          * null-termination).
5264          */
5265         xdr_terminate_string(rcvbuf, len);
5266         return 0;
5267 }
5268
5269 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5270 {
5271         int status;
5272
5273         status = decode_op_hdr(xdr, OP_REMOVE);
5274         if (status)
5275                 goto out;
5276         status = decode_change_info(xdr, cinfo);
5277 out:
5278         return status;
5279 }
5280
5281 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5282               struct nfs4_change_info *new_cinfo)
5283 {
5284         int status;
5285
5286         status = decode_op_hdr(xdr, OP_RENAME);
5287         if (status)
5288                 goto out;
5289         if ((status = decode_change_info(xdr, old_cinfo)))
5290                 goto out;
5291         status = decode_change_info(xdr, new_cinfo);
5292 out:
5293         return status;
5294 }
5295
5296 static int decode_renew(struct xdr_stream *xdr)
5297 {
5298         return decode_op_hdr(xdr, OP_RENEW);
5299 }
5300
5301 static int
5302 decode_restorefh(struct xdr_stream *xdr)
5303 {
5304         return decode_op_hdr(xdr, OP_RESTOREFH);
5305 }
5306
5307 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5308                          struct nfs_getaclres *res)
5309 {
5310         unsigned int savep;
5311         uint32_t attrlen,
5312                  bitmap[3] = {0};
5313         int status;
5314
5315         res->acl_len = 0;
5316         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5317                 goto out;
5318
5319         xdr_enter_page(xdr, xdr->buf->page_len);
5320
5321         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5322                 goto out;
5323         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5324                 goto out;
5325
5326         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5327                 return -EIO;
5328         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5329
5330                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5331                  * are stored with the acl data to handle the problem of
5332                  * variable length bitmaps.*/
5333                 res->acl_data_offset = xdr_page_pos(xdr);
5334                 res->acl_len = attrlen;
5335
5336                 /* Check for receive buffer overflow */
5337                 if (res->acl_len > (xdr->nwords << 2) ||
5338                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5339                         res->acl_flags |= NFS4_ACL_TRUNC;
5340                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5341                                         attrlen, xdr->nwords << 2);
5342                 }
5343         } else
5344                 status = -EOPNOTSUPP;
5345
5346 out:
5347         return status;
5348 }
5349
5350 static int
5351 decode_savefh(struct xdr_stream *xdr)
5352 {
5353         return decode_op_hdr(xdr, OP_SAVEFH);
5354 }
5355
5356 static int decode_setattr(struct xdr_stream *xdr)
5357 {
5358         int status;
5359
5360         status = decode_op_hdr(xdr, OP_SETATTR);
5361         if (status)
5362                 return status;
5363         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5364                 return 0;
5365         return -EIO;
5366 }
5367
5368 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5369 {
5370         __be32 *p;
5371         uint32_t opnum;
5372         int32_t nfserr;
5373
5374         p = xdr_inline_decode(xdr, 8);
5375         if (unlikely(!p))
5376                 return -EIO;
5377         opnum = be32_to_cpup(p++);
5378         if (opnum != OP_SETCLIENTID) {
5379                 dprintk("nfs: decode_setclientid: Server returned operation"
5380                         " %d\n", opnum);
5381                 return -EIO;
5382         }
5383         nfserr = be32_to_cpup(p);
5384         if (nfserr == NFS_OK) {
5385                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5386                 if (unlikely(!p))
5387                         return -EIO;
5388                 p = xdr_decode_hyper(p, &res->clientid);
5389                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5390         } else if (nfserr == NFSERR_CLID_INUSE) {
5391                 uint32_t len;
5392
5393                 /* skip netid string */
5394                 p = xdr_inline_decode(xdr, 4);
5395                 if (unlikely(!p))
5396                         return -EIO;
5397                 len = be32_to_cpup(p);
5398                 p = xdr_inline_decode(xdr, len);
5399                 if (unlikely(!p))
5400                         return -EIO;
5401
5402                 /* skip uaddr string */
5403                 p = xdr_inline_decode(xdr, 4);
5404                 if (unlikely(!p))
5405                         return -EIO;
5406                 len = be32_to_cpup(p);
5407                 p = xdr_inline_decode(xdr, len);
5408                 if (unlikely(!p))
5409                         return -EIO;
5410                 return -NFSERR_CLID_INUSE;
5411         } else
5412                 return nfs4_stat_to_errno(nfserr);
5413
5414         return 0;
5415 }
5416
5417 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5418 {
5419         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5420 }
5421
5422 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5423 {
5424         __be32 *p;
5425         int status;
5426
5427         status = decode_op_hdr(xdr, OP_WRITE);
5428         if (status)
5429                 return status;
5430
5431         p = xdr_inline_decode(xdr, 8);
5432         if (unlikely(!p))
5433                 return -EIO;
5434         res->count = be32_to_cpup(p++);
5435         res->verf->committed = be32_to_cpup(p++);
5436         return decode_write_verifier(xdr, &res->verf->verifier);
5437 }
5438
5439 static int decode_delegreturn(struct xdr_stream *xdr)
5440 {
5441         return decode_op_hdr(xdr, OP_DELEGRETURN);
5442 }
5443
5444 static int decode_secinfo_gss(struct xdr_stream *xdr,
5445                               struct nfs4_secinfo4 *flavor)
5446 {
5447         u32 oid_len;
5448         __be32 *p;
5449
5450         p = xdr_inline_decode(xdr, 4);
5451         if (unlikely(!p))
5452                 return -EIO;
5453         oid_len = be32_to_cpup(p);
5454         if (oid_len > GSS_OID_MAX_LEN)
5455                 return -EINVAL;
5456
5457         p = xdr_inline_decode(xdr, oid_len);
5458         if (unlikely(!p))
5459                 return -EIO;
5460         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5461         flavor->flavor_info.oid.len = oid_len;
5462
5463         p = xdr_inline_decode(xdr, 8);
5464         if (unlikely(!p))
5465                 return -EIO;
5466         flavor->flavor_info.qop = be32_to_cpup(p++);
5467         flavor->flavor_info.service = be32_to_cpup(p);
5468
5469         return 0;
5470 }
5471
5472 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5473 {
5474         struct nfs4_secinfo4 *sec_flavor;
5475         unsigned int i, num_flavors;
5476         int status;
5477         __be32 *p;
5478
5479         p = xdr_inline_decode(xdr, 4);
5480         if (unlikely(!p))
5481                 return -EIO;
5482
5483         res->flavors->num_flavors = 0;
5484         num_flavors = be32_to_cpup(p);
5485
5486         for (i = 0; i < num_flavors; i++) {
5487                 sec_flavor = &res->flavors->flavors[i];
5488                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5489                         break;
5490
5491                 p = xdr_inline_decode(xdr, 4);
5492                 if (unlikely(!p))
5493                         return -EIO;
5494                 sec_flavor->flavor = be32_to_cpup(p);
5495
5496                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5497                         status = decode_secinfo_gss(xdr, sec_flavor);
5498                         if (status)
5499                                 goto out;
5500                 }
5501                 res->flavors->num_flavors++;
5502         }
5503
5504         status = 0;
5505 out:
5506         return status;
5507 }
5508
5509 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5510 {
5511         int status = decode_op_hdr(xdr, OP_SECINFO);
5512         if (status)
5513                 return status;
5514         return decode_secinfo_common(xdr, res);
5515 }
5516
5517 #if defined(CONFIG_NFS_V4_1)
5518 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5519 {
5520         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5521         if (status)
5522                 return status;
5523         return decode_secinfo_common(xdr, res);
5524 }
5525
5526 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5527 {
5528         __be32 *p;
5529         uint32_t bitmap_words;
5530         unsigned int i;
5531
5532         p = xdr_inline_decode(xdr, 4);
5533         if (!p)
5534                 return -EIO;
5535         bitmap_words = be32_to_cpup(p++);
5536         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5537                 return -EIO;
5538         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5539         for (i = 0; i < bitmap_words; i++)
5540                 op_map->u.words[i] = be32_to_cpup(p++);
5541
5542         return 0;
5543 }
5544
5545 static int decode_exchange_id(struct xdr_stream *xdr,
5546                               struct nfs41_exchange_id_res *res)
5547 {
5548         __be32 *p;
5549         uint32_t dummy;
5550         char *dummy_str;
5551         int status;
5552         uint32_t impl_id_count;
5553
5554         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5555         if (status)
5556                 return status;
5557
5558         p = xdr_inline_decode(xdr, 8);
5559         if (unlikely(!p))
5560                 return -EIO;
5561         xdr_decode_hyper(p, &res->clientid);
5562         p = xdr_inline_decode(xdr, 12);
5563         if (unlikely(!p))
5564                 return -EIO;
5565         res->seqid = be32_to_cpup(p++);
5566         res->flags = be32_to_cpup(p++);
5567
5568         res->state_protect.how = be32_to_cpup(p);
5569         switch (res->state_protect.how) {
5570         case SP4_NONE:
5571                 break;
5572         case SP4_MACH_CRED:
5573                 status = decode_op_map(xdr, &res->state_protect.enforce);
5574                 if (status)
5575                         return status;
5576                 status = decode_op_map(xdr, &res->state_protect.allow);
5577                 if (status)
5578                         return status;
5579                 break;
5580         default:
5581                 WARN_ON_ONCE(1);
5582                 return -EIO;
5583         }
5584
5585         /* server_owner4.so_minor_id */
5586         p = xdr_inline_decode(xdr, 8);
5587         if (unlikely(!p))
5588                 return -EIO;
5589         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5590
5591         /* server_owner4.so_major_id */
5592         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5593         if (unlikely(status))
5594                 return status;
5595         memcpy(res->server_owner->major_id, dummy_str, dummy);
5596         res->server_owner->major_id_sz = dummy;
5597
5598         /* server_scope4 */
5599         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5600         if (unlikely(status))
5601                 return status;
5602         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5603         res->server_scope->server_scope_sz = dummy;
5604
5605         /* Implementation Id */
5606         p = xdr_inline_decode(xdr, 4);
5607         if (unlikely(!p))
5608                 return -EIO;
5609         impl_id_count = be32_to_cpup(p++);
5610
5611         if (impl_id_count) {
5612                 /* nii_domain */
5613                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5614                 if (unlikely(status))
5615                         return status;
5616                 memcpy(res->impl_id->domain, dummy_str, dummy);
5617
5618                 /* nii_name */
5619                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5620                 if (unlikely(status))
5621                         return status;
5622                 memcpy(res->impl_id->name, dummy_str, dummy);
5623
5624                 /* nii_date */
5625                 p = xdr_inline_decode(xdr, 12);
5626                 if (unlikely(!p))
5627                         return -EIO;
5628                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5629                 res->impl_id->date.nseconds = be32_to_cpup(p);
5630
5631                 /* if there's more than one entry, ignore the rest */
5632         }
5633         return 0;
5634 }
5635
5636 static int decode_chan_attrs(struct xdr_stream *xdr,
5637                              struct nfs4_channel_attrs *attrs)
5638 {
5639         __be32 *p;
5640         u32 nr_attrs, val;
5641
5642         p = xdr_inline_decode(xdr, 28);
5643         if (unlikely(!p))
5644                 return -EIO;
5645         val = be32_to_cpup(p++);        /* headerpadsz */
5646         if (val)
5647                 return -EINVAL;         /* no support for header padding yet */
5648         attrs->max_rqst_sz = be32_to_cpup(p++);
5649         attrs->max_resp_sz = be32_to_cpup(p++);
5650         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5651         attrs->max_ops = be32_to_cpup(p++);
5652         attrs->max_reqs = be32_to_cpup(p++);
5653         nr_attrs = be32_to_cpup(p);
5654         if (unlikely(nr_attrs > 1)) {
5655                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5656                         "count %u\n", __func__, nr_attrs);
5657                 return -EINVAL;
5658         }
5659         if (nr_attrs == 1) {
5660                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5661                 if (unlikely(!p))
5662                         return -EIO;
5663         }
5664         return 0;
5665 }
5666
5667 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5668 {
5669         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5670 }
5671
5672 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5673                                 struct nfs41_bind_conn_to_session_res *res)
5674 {
5675         __be32 *p;
5676         int status;
5677
5678         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5679         if (!status)
5680                 status = decode_sessionid(xdr, &res->sessionid);
5681         if (unlikely(status))
5682                 return status;
5683
5684         /* dir flags, rdma mode bool */
5685         p = xdr_inline_decode(xdr, 8);
5686         if (unlikely(!p))
5687                 return -EIO;
5688
5689         res->dir = be32_to_cpup(p++);
5690         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5691                 return -EIO;
5692         if (be32_to_cpup(p) == 0)
5693                 res->use_conn_in_rdma_mode = false;
5694         else
5695                 res->use_conn_in_rdma_mode = true;
5696
5697         return 0;
5698 }
5699
5700 static int decode_create_session(struct xdr_stream *xdr,
5701                                  struct nfs41_create_session_res *res)
5702 {
5703         __be32 *p;
5704         int status;
5705
5706         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5707         if (!status)
5708                 status = decode_sessionid(xdr, &res->sessionid);
5709         if (unlikely(status))
5710                 return status;
5711
5712         /* seqid, flags */
5713         p = xdr_inline_decode(xdr, 8);
5714         if (unlikely(!p))
5715                 return -EIO;
5716         res->seqid = be32_to_cpup(p++);
5717         res->flags = be32_to_cpup(p);
5718
5719         /* Channel attributes */
5720         status = decode_chan_attrs(xdr, &res->fc_attrs);
5721         if (!status)
5722                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5723         return status;
5724 }
5725
5726 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5727 {
5728         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5729 }
5730
5731 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5732 {
5733         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5734 }
5735
5736 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5737 {
5738         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5739 }
5740 #endif /* CONFIG_NFS_V4_1 */
5741
5742 static int decode_sequence(struct xdr_stream *xdr,
5743                            struct nfs4_sequence_res *res,
5744                            struct rpc_rqst *rqstp)
5745 {
5746 #if defined(CONFIG_NFS_V4_1)
5747         struct nfs4_session *session;
5748         struct nfs4_sessionid id;
5749         u32 dummy;
5750         int status;
5751         __be32 *p;
5752
5753         if (res->sr_slot == NULL)
5754                 return 0;
5755         if (!res->sr_slot->table->session)
5756                 return 0;
5757
5758         status = decode_op_hdr(xdr, OP_SEQUENCE);
5759         if (!status)
5760                 status = decode_sessionid(xdr, &id);
5761         if (unlikely(status))
5762                 goto out_err;
5763
5764         /*
5765          * If the server returns different values for sessionID, slotID or
5766          * sequence number, the server is looney tunes.
5767          */
5768         status = -EREMOTEIO;
5769         session = res->sr_slot->table->session;
5770
5771         if (memcmp(id.data, session->sess_id.data,
5772                    NFS4_MAX_SESSIONID_LEN)) {
5773                 dprintk("%s Invalid session id\n", __func__);
5774                 goto out_err;
5775         }
5776
5777         p = xdr_inline_decode(xdr, 20);
5778         if (unlikely(!p))
5779                 goto out_overflow;
5780
5781         /* seqid */
5782         dummy = be32_to_cpup(p++);
5783         if (dummy != res->sr_slot->seq_nr) {
5784                 dprintk("%s Invalid sequence number\n", __func__);
5785                 goto out_err;
5786         }
5787         /* slot id */
5788         dummy = be32_to_cpup(p++);
5789         if (dummy != res->sr_slot->slot_nr) {
5790                 dprintk("%s Invalid slot id\n", __func__);
5791                 goto out_err;
5792         }
5793         /* highest slot id */
5794         res->sr_highest_slotid = be32_to_cpup(p++);
5795         /* target highest slot id */
5796         res->sr_target_highest_slotid = be32_to_cpup(p++);
5797         /* result flags */
5798         res->sr_status_flags = be32_to_cpup(p);
5799         status = 0;
5800 out_err:
5801         res->sr_status = status;
5802         return status;
5803 out_overflow:
5804         status = -EIO;
5805         goto out_err;
5806 #else  /* CONFIG_NFS_V4_1 */
5807         return 0;
5808 #endif /* CONFIG_NFS_V4_1 */
5809 }
5810
5811 #if defined(CONFIG_NFS_V4_1)
5812 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5813 {
5814         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5815         return decode_stateid(xdr, stateid);
5816 }
5817
5818 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5819                                 struct nfs4_getdeviceinfo_res *res)
5820 {
5821         struct pnfs_device *pdev = res->pdev;
5822         __be32 *p;
5823         uint32_t len, type;
5824         int status;
5825
5826         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5827         if (status) {
5828                 if (status == -ETOOSMALL) {
5829                         p = xdr_inline_decode(xdr, 4);
5830                         if (unlikely(!p))
5831                                 return -EIO;
5832                         pdev->mincount = be32_to_cpup(p);
5833                         dprintk("%s: Min count too small. mincnt = %u\n",
5834                                 __func__, pdev->mincount);
5835                 }
5836                 return status;
5837         }
5838
5839         p = xdr_inline_decode(xdr, 8);
5840         if (unlikely(!p))
5841                 return -EIO;
5842         type = be32_to_cpup(p++);
5843         if (type != pdev->layout_type) {
5844                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5845                         __func__, pdev->layout_type, type);
5846                 return -EINVAL;
5847         }
5848         /*
5849          * Get the length of the opaque device_addr4. xdr_read_pages places
5850          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5851          * and places the remaining xdr data in xdr_buf->tail
5852          */
5853         pdev->mincount = be32_to_cpup(p);
5854         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5855                 return -EIO;
5856
5857         /* Parse notification bitmap, verifying that it is zero. */
5858         p = xdr_inline_decode(xdr, 4);
5859         if (unlikely(!p))
5860                 return -EIO;
5861         len = be32_to_cpup(p);
5862         if (len) {
5863                 uint32_t i;
5864
5865                 p = xdr_inline_decode(xdr, 4 * len);
5866                 if (unlikely(!p))
5867                         return -EIO;
5868
5869                 res->notification = be32_to_cpup(p++);
5870                 for (i = 1; i < len; i++) {
5871                         if (be32_to_cpup(p++)) {
5872                                 dprintk("%s: unsupported notification\n",
5873                                         __func__);
5874                                 return -EIO;
5875                         }
5876                 }
5877         }
5878         return 0;
5879 }
5880
5881 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5882                             struct nfs4_layoutget_res *res)
5883 {
5884         __be32 *p;
5885         int status;
5886         u32 layout_count;
5887         u32 recvd;
5888
5889         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5890         if (status)
5891                 goto out;
5892         p = xdr_inline_decode(xdr, 4);
5893         if (unlikely(!p))
5894                 goto out_overflow;
5895         res->return_on_close = be32_to_cpup(p);
5896         decode_layout_stateid(xdr, &res->stateid);
5897         p = xdr_inline_decode(xdr, 4);
5898         if (unlikely(!p))
5899                 goto out_overflow;
5900         layout_count = be32_to_cpup(p);
5901         if (!layout_count) {
5902                 dprintk("%s: server responded with empty layout array\n",
5903                         __func__);
5904                 status = -EINVAL;
5905                 goto out;
5906         }
5907
5908         p = xdr_inline_decode(xdr, 28);
5909         if (unlikely(!p))
5910                 goto out_overflow;
5911         p = xdr_decode_hyper(p, &res->range.offset);
5912         p = xdr_decode_hyper(p, &res->range.length);
5913         res->range.iomode = be32_to_cpup(p++);
5914         res->type = be32_to_cpup(p++);
5915         res->layoutp->len = be32_to_cpup(p);
5916
5917         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5918                 __func__,
5919                 (unsigned long)res->range.offset,
5920                 (unsigned long)res->range.length,
5921                 res->range.iomode,
5922                 res->type,
5923                 res->layoutp->len);
5924
5925         recvd = xdr_read_pages(xdr, res->layoutp->len);
5926         if (res->layoutp->len > recvd) {
5927                 dprintk("NFS: server cheating in layoutget reply: "
5928                                 "layout len %u > recvd %u\n",
5929                                 res->layoutp->len, recvd);
5930                 status = -EINVAL;
5931                 goto out;
5932         }
5933
5934         if (layout_count > 1) {
5935                 /* We only handle a length one array at the moment.  Any
5936                  * further entries are just ignored.  Note that this means
5937                  * the client may see a response that is less than the
5938                  * minimum it requested.
5939                  */
5940                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5941                         __func__, layout_count);
5942         }
5943
5944 out:
5945         res->status = status;
5946         return status;
5947 out_overflow:
5948         status = -EIO;
5949         goto out;
5950 }
5951
5952 static int decode_layoutreturn(struct xdr_stream *xdr,
5953                                struct nfs4_layoutreturn_res *res)
5954 {
5955         __be32 *p;
5956         int status;
5957
5958         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5959         if (status)
5960                 return status;
5961         p = xdr_inline_decode(xdr, 4);
5962         if (unlikely(!p))
5963                 return -EIO;
5964         res->lrs_present = be32_to_cpup(p);
5965         if (res->lrs_present)
5966                 status = decode_layout_stateid(xdr, &res->stateid);
5967         else
5968                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5969         return status;
5970 }
5971
5972 static int decode_layoutcommit(struct xdr_stream *xdr,
5973                                struct rpc_rqst *req,
5974                                struct nfs4_layoutcommit_res *res)
5975 {
5976         __be32 *p;
5977         __u32 sizechanged;
5978         int status;
5979
5980         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5981         res->status = status;
5982         if (status)
5983                 return status;
5984
5985         p = xdr_inline_decode(xdr, 4);
5986         if (unlikely(!p))
5987                 return -EIO;
5988         sizechanged = be32_to_cpup(p);
5989
5990         if (sizechanged) {
5991                 /* throw away new size */
5992                 p = xdr_inline_decode(xdr, 8);
5993                 if (unlikely(!p))
5994                         return -EIO;
5995         }
5996         return 0;
5997 }
5998
5999 static int decode_test_stateid(struct xdr_stream *xdr,
6000                                struct nfs41_test_stateid_res *res)
6001 {
6002         __be32 *p;
6003         int status;
6004         int num_res;
6005
6006         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6007         if (status)
6008                 return status;
6009
6010         p = xdr_inline_decode(xdr, 4);
6011         if (unlikely(!p))
6012                 return -EIO;
6013         num_res = be32_to_cpup(p++);
6014         if (num_res != 1)
6015                 return -EIO;
6016
6017         p = xdr_inline_decode(xdr, 4);
6018         if (unlikely(!p))
6019                 return -EIO;
6020         res->status = be32_to_cpup(p++);
6021
6022         return status;
6023 }
6024
6025 static int decode_free_stateid(struct xdr_stream *xdr,
6026                                struct nfs41_free_stateid_res *res)
6027 {
6028         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6029         return res->status;
6030 }
6031 #else
6032 static inline
6033 int decode_layoutreturn(struct xdr_stream *xdr,
6034                                struct nfs4_layoutreturn_res *res)
6035 {
6036         return 0;
6037 }
6038
6039 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6040                             struct nfs4_layoutget_res *res)
6041 {
6042         return 0;
6043 }
6044
6045 #endif /* CONFIG_NFS_V4_1 */
6046
6047 /*
6048  * END OF "GENERIC" DECODE ROUTINES.
6049  */
6050
6051 /*
6052  * Decode OPEN_DOWNGRADE response
6053  */
6054 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6055                                        struct xdr_stream *xdr,
6056                                        void *data)
6057 {
6058         struct nfs_closeres *res = data;
6059         struct compound_hdr hdr;
6060         int status;
6061
6062         status = decode_compound_hdr(xdr, &hdr);
6063         if (status)
6064                 goto out;
6065         status = decode_sequence(xdr, &res->seq_res, rqstp);
6066         if (status)
6067                 goto out;
6068         status = decode_putfh(xdr);
6069         if (status)
6070                 goto out;
6071         if (res->lr_res) {
6072                 status = decode_layoutreturn(xdr, res->lr_res);
6073                 res->lr_ret = status;
6074                 if (status)
6075                         goto out;
6076         }
6077         status = decode_open_downgrade(xdr, res);
6078 out:
6079         return status;
6080 }
6081
6082 /*
6083  * Decode ACCESS response
6084  */
6085 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6086                                void *data)
6087 {
6088         struct nfs4_accessres *res = data;
6089         struct compound_hdr hdr;
6090         int status;
6091
6092         status = decode_compound_hdr(xdr, &hdr);
6093         if (status)
6094                 goto out;
6095         status = decode_sequence(xdr, &res->seq_res, rqstp);
6096         if (status)
6097                 goto out;
6098         status = decode_putfh(xdr);
6099         if (status != 0)
6100                 goto out;
6101         status = decode_access(xdr, &res->supported, &res->access);
6102         if (status != 0)
6103                 goto out;
6104         if (res->fattr)
6105                 decode_getfattr(xdr, res->fattr, res->server);
6106 out:
6107         return status;
6108 }
6109
6110 /*
6111  * Decode LOOKUP response
6112  */
6113 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6114                                void *data)
6115 {
6116         struct nfs4_lookup_res *res = data;
6117         struct compound_hdr hdr;
6118         int status;
6119
6120         status = decode_compound_hdr(xdr, &hdr);
6121         if (status)
6122                 goto out;
6123         status = decode_sequence(xdr, &res->seq_res, rqstp);
6124         if (status)
6125                 goto out;
6126         status = decode_putfh(xdr);
6127         if (status)
6128                 goto out;
6129         status = decode_lookup(xdr);
6130         if (status)
6131                 goto out;
6132         status = decode_getfh(xdr, res->fh);
6133         if (status)
6134                 goto out;
6135         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6136 out:
6137         return status;
6138 }
6139
6140 /*
6141  * Decode LOOKUPP response
6142  */
6143 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6144                 void *data)
6145 {
6146         struct nfs4_lookupp_res *res = data;
6147         struct compound_hdr hdr;
6148         int status;
6149
6150         status = decode_compound_hdr(xdr, &hdr);
6151         if (status)
6152                 goto out;
6153         status = decode_sequence(xdr, &res->seq_res, rqstp);
6154         if (status)
6155                 goto out;
6156         status = decode_putfh(xdr);
6157         if (status)
6158                 goto out;
6159         status = decode_lookupp(xdr);
6160         if (status)
6161                 goto out;
6162         status = decode_getfh(xdr, res->fh);
6163         if (status)
6164                 goto out;
6165         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6166 out:
6167         return status;
6168 }
6169
6170 /*
6171  * Decode LOOKUP_ROOT response
6172  */
6173 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6174                                     struct xdr_stream *xdr,
6175                                     void *data)
6176 {
6177         struct nfs4_lookup_res *res = data;
6178         struct compound_hdr hdr;
6179         int status;
6180
6181         status = decode_compound_hdr(xdr, &hdr);
6182         if (status)
6183                 goto out;
6184         status = decode_sequence(xdr, &res->seq_res, rqstp);
6185         if (status)
6186                 goto out;
6187         status = decode_putrootfh(xdr);
6188         if (status)
6189                 goto out;
6190         status = decode_getfh(xdr, res->fh);
6191         if (status == 0)
6192                 status = decode_getfattr_label(xdr, res->fattr,
6193                                                 res->label, res->server);
6194 out:
6195         return status;
6196 }
6197
6198 /*
6199  * Decode REMOVE response
6200  */
6201 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6202                                void *data)
6203 {
6204         struct nfs_removeres *res = data;
6205         struct compound_hdr hdr;
6206         int status;
6207
6208         status = decode_compound_hdr(xdr, &hdr);
6209         if (status)
6210                 goto out;
6211         status = decode_sequence(xdr, &res->seq_res, rqstp);
6212         if (status)
6213                 goto out;
6214         status = decode_putfh(xdr);
6215         if (status)
6216                 goto out;
6217         status = decode_remove(xdr, &res->cinfo);
6218 out:
6219         return status;
6220 }
6221
6222 /*
6223  * Decode RENAME response
6224  */
6225 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6226                                void *data)
6227 {
6228         struct nfs_renameres *res = data;
6229         struct compound_hdr hdr;
6230         int status;
6231
6232         status = decode_compound_hdr(xdr, &hdr);
6233         if (status)
6234                 goto out;
6235         status = decode_sequence(xdr, &res->seq_res, rqstp);
6236         if (status)
6237                 goto out;
6238         status = decode_putfh(xdr);
6239         if (status)
6240                 goto out;
6241         status = decode_savefh(xdr);
6242         if (status)
6243                 goto out;
6244         status = decode_putfh(xdr);
6245         if (status)
6246                 goto out;
6247         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6248 out:
6249         return status;
6250 }
6251
6252 /*
6253  * Decode LINK response
6254  */
6255 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6256                              void *data)
6257 {
6258         struct nfs4_link_res *res = data;
6259         struct compound_hdr hdr;
6260         int status;
6261
6262         status = decode_compound_hdr(xdr, &hdr);
6263         if (status)
6264                 goto out;
6265         status = decode_sequence(xdr, &res->seq_res, rqstp);
6266         if (status)
6267                 goto out;
6268         status = decode_putfh(xdr);
6269         if (status)
6270                 goto out;
6271         status = decode_savefh(xdr);
6272         if (status)
6273                 goto out;
6274         status = decode_putfh(xdr);
6275         if (status)
6276                 goto out;
6277         status = decode_link(xdr, &res->cinfo);
6278         if (status)
6279                 goto out;
6280         /*
6281          * Note order: OP_LINK leaves the directory as the current
6282          *             filehandle.
6283          */
6284         status = decode_restorefh(xdr);
6285         if (status)
6286                 goto out;
6287         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6288 out:
6289         return status;
6290 }
6291
6292 /*
6293  * Decode CREATE response
6294  */
6295 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6296                                void *data)
6297 {
6298         struct nfs4_create_res *res = data;
6299         struct compound_hdr hdr;
6300         int status;
6301
6302         status = decode_compound_hdr(xdr, &hdr);
6303         if (status)
6304                 goto out;
6305         status = decode_sequence(xdr, &res->seq_res, rqstp);
6306         if (status)
6307                 goto out;
6308         status = decode_putfh(xdr);
6309         if (status)
6310                 goto out;
6311         status = decode_create(xdr, &res->dir_cinfo);
6312         if (status)
6313                 goto out;
6314         status = decode_getfh(xdr, res->fh);
6315         if (status)
6316                 goto out;
6317         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6318 out:
6319         return status;
6320 }
6321
6322 /*
6323  * Decode SYMLINK response
6324  */
6325 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6326                                 void *res)
6327 {
6328         return nfs4_xdr_dec_create(rqstp, xdr, res);
6329 }
6330
6331 /*
6332  * Decode GETATTR response
6333  */
6334 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6335                                 void *data)
6336 {
6337         struct nfs4_getattr_res *res = data;
6338         struct compound_hdr hdr;
6339         int status;
6340
6341         status = decode_compound_hdr(xdr, &hdr);
6342         if (status)
6343                 goto out;
6344         status = decode_sequence(xdr, &res->seq_res, rqstp);
6345         if (status)
6346                 goto out;
6347         status = decode_putfh(xdr);
6348         if (status)
6349                 goto out;
6350         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6351 out:
6352         return status;
6353 }
6354
6355 /*
6356  * Encode an SETACL request
6357  */
6358 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6359                                 const void *data)
6360 {
6361         const struct nfs_setaclargs *args = data;
6362         struct compound_hdr hdr = {
6363                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6364         };
6365
6366         encode_compound_hdr(xdr, req, &hdr);
6367         encode_sequence(xdr, &args->seq_args, &hdr);
6368         encode_putfh(xdr, args->fh, &hdr);
6369         encode_setacl(xdr, args, &hdr);
6370         encode_nops(&hdr);
6371 }
6372
6373 /*
6374  * Decode SETACL response
6375  */
6376 static int
6377 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6378                     void *data)
6379 {
6380         struct nfs_setaclres *res = data;
6381         struct compound_hdr hdr;
6382         int status;
6383
6384         status = decode_compound_hdr(xdr, &hdr);
6385         if (status)
6386                 goto out;
6387         status = decode_sequence(xdr, &res->seq_res, rqstp);
6388         if (status)
6389                 goto out;
6390         status = decode_putfh(xdr);
6391         if (status)
6392                 goto out;
6393         status = decode_setattr(xdr);
6394 out:
6395         return status;
6396 }
6397
6398 /*
6399  * Decode GETACL response
6400  */
6401 static int
6402 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6403                     void *data)
6404 {
6405         struct nfs_getaclres *res = data;
6406         struct compound_hdr hdr;
6407         int status;
6408
6409         if (res->acl_scratch != NULL) {
6410                 void *p = page_address(res->acl_scratch);
6411                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6412         }
6413         status = decode_compound_hdr(xdr, &hdr);
6414         if (status)
6415                 goto out;
6416         status = decode_sequence(xdr, &res->seq_res, rqstp);
6417         if (status)
6418                 goto out;
6419         status = decode_putfh(xdr);
6420         if (status)
6421                 goto out;
6422         status = decode_getacl(xdr, rqstp, res);
6423
6424 out:
6425         return status;
6426 }
6427
6428 /*
6429  * Decode CLOSE response
6430  */
6431 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6432                               void *data)
6433 {
6434         struct nfs_closeres *res = data;
6435         struct compound_hdr hdr;
6436         int status;
6437
6438         status = decode_compound_hdr(xdr, &hdr);
6439         if (status)
6440                 goto out;
6441         status = decode_sequence(xdr, &res->seq_res, rqstp);
6442         if (status)
6443                 goto out;
6444         status = decode_putfh(xdr);
6445         if (status)
6446                 goto out;
6447         if (res->lr_res) {
6448                 status = decode_layoutreturn(xdr, res->lr_res);
6449                 res->lr_ret = status;
6450                 if (status)
6451                         goto out;
6452         }
6453         if (res->fattr != NULL) {
6454                 status = decode_getfattr(xdr, res->fattr, res->server);
6455                 if (status != 0)
6456                         goto out;
6457         }
6458         status = decode_close(xdr, res);
6459 out:
6460         return status;
6461 }
6462
6463 /*
6464  * Decode OPEN response
6465  */
6466 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6467                              void *data)
6468 {
6469         struct nfs_openres *res = data;
6470         struct compound_hdr hdr;
6471         int status;
6472
6473         status = decode_compound_hdr(xdr, &hdr);
6474         if (status)
6475                 goto out;
6476         status = decode_sequence(xdr, &res->seq_res, rqstp);
6477         if (status)
6478                 goto out;
6479         status = decode_putfh(xdr);
6480         if (status)
6481                 goto out;
6482         status = decode_open(xdr, res);
6483         if (status)
6484                 goto out;
6485         status = decode_getfh(xdr, &res->fh);
6486         if (status)
6487                 goto out;
6488         if (res->access_request)
6489                 decode_access(xdr, &res->access_supported, &res->access_result);
6490         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6491         if (res->lg_res)
6492                 decode_layoutget(xdr, rqstp, res->lg_res);
6493 out:
6494         return status;
6495 }
6496
6497 /*
6498  * Decode OPEN_CONFIRM response
6499  */
6500 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6501                                      struct xdr_stream *xdr,
6502                                      void *data)
6503 {
6504         struct nfs_open_confirmres *res = data;
6505         struct compound_hdr hdr;
6506         int status;
6507
6508         status = decode_compound_hdr(xdr, &hdr);
6509         if (status)
6510                 goto out;
6511         status = decode_putfh(xdr);
6512         if (status)
6513                 goto out;
6514         status = decode_open_confirm(xdr, res);
6515 out:
6516         return status;
6517 }
6518
6519 /*
6520  * Decode OPEN response
6521  */
6522 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6523                                     struct xdr_stream *xdr,
6524                                     void *data)
6525 {
6526         struct nfs_openres *res = data;
6527         struct compound_hdr hdr;
6528         int status;
6529
6530         status = decode_compound_hdr(xdr, &hdr);
6531         if (status)
6532                 goto out;
6533         status = decode_sequence(xdr, &res->seq_res, rqstp);
6534         if (status)
6535                 goto out;
6536         status = decode_putfh(xdr);
6537         if (status)
6538                 goto out;
6539         status = decode_open(xdr, res);
6540         if (status)
6541                 goto out;
6542         if (res->access_request)
6543                 decode_access(xdr, &res->access_supported, &res->access_result);
6544         decode_getfattr(xdr, res->f_attr, res->server);
6545         if (res->lg_res)
6546                 decode_layoutget(xdr, rqstp, res->lg_res);
6547 out:
6548         return status;
6549 }
6550
6551 /*
6552  * Decode SETATTR response
6553  */
6554 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6555                                 struct xdr_stream *xdr,
6556                                 void *data)
6557 {
6558         struct nfs_setattrres *res = data;
6559         struct compound_hdr hdr;
6560         int status;
6561
6562         status = decode_compound_hdr(xdr, &hdr);
6563         if (status)
6564                 goto out;
6565         status = decode_sequence(xdr, &res->seq_res, rqstp);
6566         if (status)
6567                 goto out;
6568         status = decode_putfh(xdr);
6569         if (status)
6570                 goto out;
6571         status = decode_setattr(xdr);
6572         if (status)
6573                 goto out;
6574         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6575 out:
6576         return status;
6577 }
6578
6579 /*
6580  * Decode LOCK response
6581  */
6582 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6583                              void *data)
6584 {
6585         struct nfs_lock_res *res = data;
6586         struct compound_hdr hdr;
6587         int status;
6588
6589         status = decode_compound_hdr(xdr, &hdr);
6590         if (status)
6591                 goto out;
6592         status = decode_sequence(xdr, &res->seq_res, rqstp);
6593         if (status)
6594                 goto out;
6595         status = decode_putfh(xdr);
6596         if (status)
6597                 goto out;
6598         status = decode_lock(xdr, res);
6599 out:
6600         return status;
6601 }
6602
6603 /*
6604  * Decode LOCKT response
6605  */
6606 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6607                               void *data)
6608 {
6609         struct nfs_lockt_res *res = data;
6610         struct compound_hdr hdr;
6611         int status;
6612
6613         status = decode_compound_hdr(xdr, &hdr);
6614         if (status)
6615                 goto out;
6616         status = decode_sequence(xdr, &res->seq_res, rqstp);
6617         if (status)
6618                 goto out;
6619         status = decode_putfh(xdr);
6620         if (status)
6621                 goto out;
6622         status = decode_lockt(xdr, res);
6623 out:
6624         return status;
6625 }
6626
6627 /*
6628  * Decode LOCKU response
6629  */
6630 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6631                               void *data)
6632 {
6633         struct nfs_locku_res *res = data;
6634         struct compound_hdr hdr;
6635         int status;
6636
6637         status = decode_compound_hdr(xdr, &hdr);
6638         if (status)
6639                 goto out;
6640         status = decode_sequence(xdr, &res->seq_res, rqstp);
6641         if (status)
6642                 goto out;
6643         status = decode_putfh(xdr);
6644         if (status)
6645                 goto out;
6646         status = decode_locku(xdr, res);
6647 out:
6648         return status;
6649 }
6650
6651 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6652                                           struct xdr_stream *xdr, void *dummy)
6653 {
6654         struct compound_hdr hdr;
6655         int status;
6656
6657         status = decode_compound_hdr(xdr, &hdr);
6658         if (!status)
6659                 status = decode_release_lockowner(xdr);
6660         return status;
6661 }
6662
6663 /*
6664  * Decode READLINK response
6665  */
6666 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6667                                  struct xdr_stream *xdr,
6668                                  void *data)
6669 {
6670         struct nfs4_readlink_res *res = data;
6671         struct compound_hdr hdr;
6672         int status;
6673
6674         status = decode_compound_hdr(xdr, &hdr);
6675         if (status)
6676                 goto out;
6677         status = decode_sequence(xdr, &res->seq_res, rqstp);
6678         if (status)
6679                 goto out;
6680         status = decode_putfh(xdr);
6681         if (status)
6682                 goto out;
6683         status = decode_readlink(xdr, rqstp);
6684 out:
6685         return status;
6686 }
6687
6688 /*
6689  * Decode READDIR response
6690  */
6691 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6692                                 void *data)
6693 {
6694         struct nfs4_readdir_res *res = data;
6695         struct compound_hdr hdr;
6696         int status;
6697
6698         status = decode_compound_hdr(xdr, &hdr);
6699         if (status)
6700                 goto out;
6701         status = decode_sequence(xdr, &res->seq_res, rqstp);
6702         if (status)
6703                 goto out;
6704         status = decode_putfh(xdr);
6705         if (status)
6706                 goto out;
6707         status = decode_readdir(xdr, rqstp, res);
6708 out:
6709         return status;
6710 }
6711
6712 /*
6713  * Decode Read response
6714  */
6715 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6716                              void *data)
6717 {
6718         struct nfs_pgio_res *res = data;
6719         struct compound_hdr hdr;
6720         int status;
6721
6722         status = decode_compound_hdr(xdr, &hdr);
6723         res->op_status = hdr.status;
6724         if (status)
6725                 goto out;
6726         status = decode_sequence(xdr, &res->seq_res, rqstp);
6727         if (status)
6728                 goto out;
6729         status = decode_putfh(xdr);
6730         if (status)
6731                 goto out;
6732         status = decode_read(xdr, rqstp, res);
6733         if (!status)
6734                 status = res->count;
6735 out:
6736         return status;
6737 }
6738
6739 /*
6740  * Decode WRITE response
6741  */
6742 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6743                               void *data)
6744 {
6745         struct nfs_pgio_res *res = data;
6746         struct compound_hdr hdr;
6747         int status;
6748
6749         status = decode_compound_hdr(xdr, &hdr);
6750         res->op_status = hdr.status;
6751         if (status)
6752                 goto out;
6753         status = decode_sequence(xdr, &res->seq_res, rqstp);
6754         if (status)
6755                 goto out;
6756         status = decode_putfh(xdr);
6757         if (status)
6758                 goto out;
6759         status = decode_write(xdr, res);
6760         if (status)
6761                 goto out;
6762         if (res->fattr)
6763                 decode_getfattr(xdr, res->fattr, res->server);
6764         if (!status)
6765                 status = res->count;
6766 out:
6767         return status;
6768 }
6769
6770 /*
6771  * Decode COMMIT response
6772  */
6773 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6774                                void *data)
6775 {
6776         struct nfs_commitres *res = data;
6777         struct compound_hdr hdr;
6778         int status;
6779
6780         status = decode_compound_hdr(xdr, &hdr);
6781         res->op_status = hdr.status;
6782         if (status)
6783                 goto out;
6784         status = decode_sequence(xdr, &res->seq_res, rqstp);
6785         if (status)
6786                 goto out;
6787         status = decode_putfh(xdr);
6788         if (status)
6789                 goto out;
6790         status = decode_commit(xdr, res);
6791 out:
6792         return status;
6793 }
6794
6795 /*
6796  * Decode FSINFO response
6797  */
6798 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6799                                void *data)
6800 {
6801         struct nfs4_fsinfo_res *res = data;
6802         struct compound_hdr hdr;
6803         int status;
6804
6805         status = decode_compound_hdr(xdr, &hdr);
6806         if (!status)
6807                 status = decode_sequence(xdr, &res->seq_res, req);
6808         if (!status)
6809                 status = decode_putfh(xdr);
6810         if (!status)
6811                 status = decode_fsinfo(xdr, res->fsinfo);
6812         return status;
6813 }
6814
6815 /*
6816  * Decode PATHCONF response
6817  */
6818 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6819                                  void *data)
6820 {
6821         struct nfs4_pathconf_res *res = data;
6822         struct compound_hdr hdr;
6823         int status;
6824
6825         status = decode_compound_hdr(xdr, &hdr);
6826         if (!status)
6827                 status = decode_sequence(xdr, &res->seq_res, req);
6828         if (!status)
6829                 status = decode_putfh(xdr);
6830         if (!status)
6831                 status = decode_pathconf(xdr, res->pathconf);
6832         return status;
6833 }
6834
6835 /*
6836  * Decode STATFS response
6837  */
6838 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6839                                void *data)
6840 {
6841         struct nfs4_statfs_res *res = data;
6842         struct compound_hdr hdr;
6843         int status;
6844
6845         status = decode_compound_hdr(xdr, &hdr);
6846         if (!status)
6847                 status = decode_sequence(xdr, &res->seq_res, req);
6848         if (!status)
6849                 status = decode_putfh(xdr);
6850         if (!status)
6851                 status = decode_statfs(xdr, res->fsstat);
6852         return status;
6853 }
6854
6855 /*
6856  * Decode GETATTR_BITMAP response
6857  */
6858 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6859                                     struct xdr_stream *xdr,
6860                                     void *data)
6861 {
6862         struct nfs4_server_caps_res *res = data;
6863         struct compound_hdr hdr;
6864         int status;
6865
6866         status = decode_compound_hdr(xdr, &hdr);
6867         if (status)
6868                 goto out;
6869         status = decode_sequence(xdr, &res->seq_res, req);
6870         if (status)
6871                 goto out;
6872         status = decode_putfh(xdr);
6873         if (status)
6874                 goto out;
6875         status = decode_server_caps(xdr, res);
6876 out:
6877         return status;
6878 }
6879
6880 /*
6881  * Decode RENEW response
6882  */
6883 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6884                               void *__unused)
6885 {
6886         struct compound_hdr hdr;
6887         int status;
6888
6889         status = decode_compound_hdr(xdr, &hdr);
6890         if (!status)
6891                 status = decode_renew(xdr);
6892         return status;
6893 }
6894
6895 /*
6896  * Decode SETCLIENTID response
6897  */
6898 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6899                                     struct xdr_stream *xdr,
6900                                     void *data)
6901 {
6902         struct nfs4_setclientid_res *res = data;
6903         struct compound_hdr hdr;
6904         int status;
6905
6906         status = decode_compound_hdr(xdr, &hdr);
6907         if (!status)
6908                 status = decode_setclientid(xdr, res);
6909         return status;
6910 }
6911
6912 /*
6913  * Decode SETCLIENTID_CONFIRM response
6914  */
6915 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6916                                             struct xdr_stream *xdr,
6917                                             void *data)
6918 {
6919         struct compound_hdr hdr;
6920         int status;
6921
6922         status = decode_compound_hdr(xdr, &hdr);
6923         if (!status)
6924                 status = decode_setclientid_confirm(xdr);
6925         return status;
6926 }
6927
6928 /*
6929  * Decode DELEGRETURN response
6930  */
6931 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6932                                     struct xdr_stream *xdr,
6933                                     void *data)
6934 {
6935         struct nfs4_delegreturnres *res = data;
6936         struct compound_hdr hdr;
6937         int status;
6938
6939         status = decode_compound_hdr(xdr, &hdr);
6940         if (status)
6941                 goto out;
6942         status = decode_sequence(xdr, &res->seq_res, rqstp);
6943         if (status)
6944                 goto out;
6945         status = decode_putfh(xdr);
6946         if (status != 0)
6947                 goto out;
6948         if (res->lr_res) {
6949                 status = decode_layoutreturn(xdr, res->lr_res);
6950                 res->lr_ret = status;
6951                 if (status)
6952                         goto out;
6953         }
6954         if (res->fattr) {
6955                 status = decode_getfattr(xdr, res->fattr, res->server);
6956                 if (status != 0)
6957                         goto out;
6958         }
6959         status = decode_delegreturn(xdr);
6960 out:
6961         return status;
6962 }
6963
6964 /*
6965  * Decode FS_LOCATIONS response
6966  */
6967 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6968                                      struct xdr_stream *xdr,
6969                                      void *data)
6970 {
6971         struct nfs4_fs_locations_res *res = data;
6972         struct compound_hdr hdr;
6973         int status;
6974
6975         status = decode_compound_hdr(xdr, &hdr);
6976         if (status)
6977                 goto out;
6978         status = decode_sequence(xdr, &res->seq_res, req);
6979         if (status)
6980                 goto out;
6981         status = decode_putfh(xdr);
6982         if (status)
6983                 goto out;
6984         if (res->migration) {
6985                 xdr_enter_page(xdr, PAGE_SIZE);
6986                 status = decode_getfattr_generic(xdr,
6987                                         &res->fs_locations->fattr,
6988                                          NULL, res->fs_locations,
6989                                          NULL, res->fs_locations->server);
6990                 if (status)
6991                         goto out;
6992                 if (res->renew)
6993                         status = decode_renew(xdr);
6994         } else {
6995                 status = decode_lookup(xdr);
6996                 if (status)
6997                         goto out;
6998                 xdr_enter_page(xdr, PAGE_SIZE);
6999                 status = decode_getfattr_generic(xdr,
7000                                         &res->fs_locations->fattr,
7001                                          NULL, res->fs_locations,
7002                                          NULL, res->fs_locations->server);
7003         }
7004 out:
7005         return status;
7006 }
7007
7008 /*
7009  * Decode SECINFO response
7010  */
7011 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7012                                 struct xdr_stream *xdr,
7013                                 void *data)
7014 {
7015         struct nfs4_secinfo_res *res = data;
7016         struct compound_hdr hdr;
7017         int status;
7018
7019         status = decode_compound_hdr(xdr, &hdr);
7020         if (status)
7021                 goto out;
7022         status = decode_sequence(xdr, &res->seq_res, rqstp);
7023         if (status)
7024                 goto out;
7025         status = decode_putfh(xdr);
7026         if (status)
7027                 goto out;
7028         status = decode_secinfo(xdr, res);
7029 out:
7030         return status;
7031 }
7032
7033 /*
7034  * Decode FSID_PRESENT response
7035  */
7036 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7037                                      struct xdr_stream *xdr,
7038                                      void *data)
7039 {
7040         struct nfs4_fsid_present_res *res = data;
7041         struct compound_hdr hdr;
7042         int status;
7043
7044         status = decode_compound_hdr(xdr, &hdr);
7045         if (status)
7046                 goto out;
7047         status = decode_sequence(xdr, &res->seq_res, rqstp);
7048         if (status)
7049                 goto out;
7050         status = decode_putfh(xdr);
7051         if (status)
7052                 goto out;
7053         status = decode_getfh(xdr, res->fh);
7054         if (status)
7055                 goto out;
7056         if (res->renew)
7057                 status = decode_renew(xdr);
7058 out:
7059         return status;
7060 }
7061
7062 #if defined(CONFIG_NFS_V4_1)
7063 /*
7064  * Decode BIND_CONN_TO_SESSION response
7065  */
7066 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7067                                         struct xdr_stream *xdr,
7068                                         void *res)
7069 {
7070         struct compound_hdr hdr;
7071         int status;
7072
7073         status = decode_compound_hdr(xdr, &hdr);
7074         if (!status)
7075                 status = decode_bind_conn_to_session(xdr, res);
7076         return status;
7077 }
7078
7079 /*
7080  * Decode EXCHANGE_ID response
7081  */
7082 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7083                                     struct xdr_stream *xdr,
7084                                     void *res)
7085 {
7086         struct compound_hdr hdr;
7087         int status;
7088
7089         status = decode_compound_hdr(xdr, &hdr);
7090         if (!status)
7091                 status = decode_exchange_id(xdr, res);
7092         return status;
7093 }
7094
7095 /*
7096  * Decode CREATE_SESSION response
7097  */
7098 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7099                                        struct xdr_stream *xdr,
7100                                        void *res)
7101 {
7102         struct compound_hdr hdr;
7103         int status;
7104
7105         status = decode_compound_hdr(xdr, &hdr);
7106         if (!status)
7107                 status = decode_create_session(xdr, res);
7108         return status;
7109 }
7110
7111 /*
7112  * Decode DESTROY_SESSION response
7113  */
7114 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7115                                         struct xdr_stream *xdr,
7116                                         void *res)
7117 {
7118         struct compound_hdr hdr;
7119         int status;
7120
7121         status = decode_compound_hdr(xdr, &hdr);
7122         if (!status)
7123                 status = decode_destroy_session(xdr, res);
7124         return status;
7125 }
7126
7127 /*
7128  * Decode DESTROY_CLIENTID response
7129  */
7130 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7131                                         struct xdr_stream *xdr,
7132                                         void *res)
7133 {
7134         struct compound_hdr hdr;
7135         int status;
7136
7137         status = decode_compound_hdr(xdr, &hdr);
7138         if (!status)
7139                 status = decode_destroy_clientid(xdr, res);
7140         return status;
7141 }
7142
7143 /*
7144  * Decode SEQUENCE response
7145  */
7146 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7147                                  struct xdr_stream *xdr,
7148                                  void *res)
7149 {
7150         struct compound_hdr hdr;
7151         int status;
7152
7153         status = decode_compound_hdr(xdr, &hdr);
7154         if (!status)
7155                 status = decode_sequence(xdr, res, rqstp);
7156         return status;
7157 }
7158
7159 #endif
7160
7161 /*
7162  * Decode GET_LEASE_TIME response
7163  */
7164 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7165                                        struct xdr_stream *xdr,
7166                                        void *data)
7167 {
7168         struct nfs4_get_lease_time_res *res = data;
7169         struct compound_hdr hdr;
7170         int status;
7171
7172         status = decode_compound_hdr(xdr, &hdr);
7173         if (!status)
7174                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7175         if (!status)
7176                 status = decode_putrootfh(xdr);
7177         if (!status)
7178                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7179         return status;
7180 }
7181
7182 #ifdef CONFIG_NFS_V4_1
7183
7184 /*
7185  * Decode RECLAIM_COMPLETE response
7186  */
7187 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7188                                          struct xdr_stream *xdr,
7189                                          void *data)
7190 {
7191         struct nfs41_reclaim_complete_res *res = data;
7192         struct compound_hdr hdr;
7193         int status;
7194
7195         status = decode_compound_hdr(xdr, &hdr);
7196         if (!status)
7197                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7198         if (!status)
7199                 status = decode_reclaim_complete(xdr, NULL);
7200         return status;
7201 }
7202
7203 /*
7204  * Decode GETDEVINFO response
7205  */
7206 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7207                                       struct xdr_stream *xdr,
7208                                       void *data)
7209 {
7210         struct nfs4_getdeviceinfo_res *res = data;
7211         struct compound_hdr hdr;
7212         int status;
7213
7214         status = decode_compound_hdr(xdr, &hdr);
7215         if (status != 0)
7216                 goto out;
7217         status = decode_sequence(xdr, &res->seq_res, rqstp);
7218         if (status != 0)
7219                 goto out;
7220         status = decode_getdeviceinfo(xdr, res);
7221 out:
7222         return status;
7223 }
7224
7225 /*
7226  * Decode LAYOUTGET response
7227  */
7228 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7229                                   struct xdr_stream *xdr,
7230                                   void *data)
7231 {
7232         struct nfs4_layoutget_res *res = data;
7233         struct compound_hdr hdr;
7234         int status;
7235
7236         status = decode_compound_hdr(xdr, &hdr);
7237         if (status)
7238                 goto out;
7239         status = decode_sequence(xdr, &res->seq_res, rqstp);
7240         if (status)
7241                 goto out;
7242         status = decode_putfh(xdr);
7243         if (status)
7244                 goto out;
7245         status = decode_layoutget(xdr, rqstp, res);
7246 out:
7247         return status;
7248 }
7249
7250 /*
7251  * Decode LAYOUTRETURN response
7252  */
7253 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7254                                      struct xdr_stream *xdr,
7255                                      void *data)
7256 {
7257         struct nfs4_layoutreturn_res *res = data;
7258         struct compound_hdr hdr;
7259         int status;
7260
7261         status = decode_compound_hdr(xdr, &hdr);
7262         if (status)
7263                 goto out;
7264         status = decode_sequence(xdr, &res->seq_res, rqstp);
7265         if (status)
7266                 goto out;
7267         status = decode_putfh(xdr);
7268         if (status)
7269                 goto out;
7270         status = decode_layoutreturn(xdr, res);
7271 out:
7272         return status;
7273 }
7274
7275 /*
7276  * Decode LAYOUTCOMMIT response
7277  */
7278 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7279                                      struct xdr_stream *xdr,
7280                                      void *data)
7281 {
7282         struct nfs4_layoutcommit_res *res = data;
7283         struct compound_hdr hdr;
7284         int status;
7285
7286         status = decode_compound_hdr(xdr, &hdr);
7287         if (status)
7288                 goto out;
7289         status = decode_sequence(xdr, &res->seq_res, rqstp);
7290         if (status)
7291                 goto out;
7292         status = decode_putfh(xdr);
7293         if (status)
7294                 goto out;
7295         status = decode_layoutcommit(xdr, rqstp, res);
7296         if (status)
7297                 goto out;
7298         decode_getfattr(xdr, res->fattr, res->server);
7299 out:
7300         return status;
7301 }
7302
7303 /*
7304  * Decode SECINFO_NO_NAME response
7305  */
7306 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7307                                         struct xdr_stream *xdr,
7308                                         void *data)
7309 {
7310         struct nfs4_secinfo_res *res = data;
7311         struct compound_hdr hdr;
7312         int status;
7313
7314         status = decode_compound_hdr(xdr, &hdr);
7315         if (status)
7316                 goto out;
7317         status = decode_sequence(xdr, &res->seq_res, rqstp);
7318         if (status)
7319                 goto out;
7320         status = decode_putrootfh(xdr);
7321         if (status)
7322                 goto out;
7323         status = decode_secinfo_no_name(xdr, res);
7324 out:
7325         return status;
7326 }
7327
7328 /*
7329  * Decode TEST_STATEID response
7330  */
7331 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7332                                      struct xdr_stream *xdr,
7333                                      void *data)
7334 {
7335         struct nfs41_test_stateid_res *res = data;
7336         struct compound_hdr hdr;
7337         int status;
7338
7339         status = decode_compound_hdr(xdr, &hdr);
7340         if (status)
7341                 goto out;
7342         status = decode_sequence(xdr, &res->seq_res, rqstp);
7343         if (status)
7344                 goto out;
7345         status = decode_test_stateid(xdr, res);
7346 out:
7347         return status;
7348 }
7349
7350 /*
7351  * Decode FREE_STATEID response
7352  */
7353 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7354                                      struct xdr_stream *xdr,
7355                                      void *data)
7356 {
7357         struct nfs41_free_stateid_res *res = data;
7358         struct compound_hdr hdr;
7359         int status;
7360
7361         status = decode_compound_hdr(xdr, &hdr);
7362         if (status)
7363                 goto out;
7364         status = decode_sequence(xdr, &res->seq_res, rqstp);
7365         if (status)
7366                 goto out;
7367         status = decode_free_stateid(xdr, res);
7368 out:
7369         return status;
7370 }
7371 #endif /* CONFIG_NFS_V4_1 */
7372
7373 /**
7374  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7375  *                      the local page cache.
7376  * @xdr: XDR stream where entry resides
7377  * @entry: buffer to fill in with entry data
7378  * @plus: boolean indicating whether this should be a readdirplus entry
7379  *
7380  * Returns zero if successful, otherwise a negative errno value is
7381  * returned.
7382  *
7383  * This function is not invoked during READDIR reply decoding, but
7384  * rather whenever an application invokes the getdents(2) system call
7385  * on a directory already in our cache.
7386  */
7387 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7388                        bool plus)
7389 {
7390         unsigned int savep;
7391         uint32_t bitmap[3] = {0};
7392         uint32_t len;
7393         uint64_t new_cookie;
7394         __be32 *p = xdr_inline_decode(xdr, 4);
7395         if (unlikely(!p))
7396                 return -EAGAIN;
7397         if (*p == xdr_zero) {
7398                 p = xdr_inline_decode(xdr, 4);
7399                 if (unlikely(!p))
7400                         return -EAGAIN;
7401                 if (*p == xdr_zero)
7402                         return -EAGAIN;
7403                 entry->eof = 1;
7404                 return -EBADCOOKIE;
7405         }
7406
7407         p = xdr_inline_decode(xdr, 12);
7408         if (unlikely(!p))
7409                 return -EAGAIN;
7410         p = xdr_decode_hyper(p, &new_cookie);
7411         entry->len = be32_to_cpup(p);
7412
7413         p = xdr_inline_decode(xdr, entry->len);
7414         if (unlikely(!p))
7415                 return -EAGAIN;
7416         entry->name = (const char *) p;
7417
7418         /*
7419          * In case the server doesn't return an inode number,
7420          * we fake one here.  (We don't use inode number 0,
7421          * since glibc seems to choke on it...)
7422          */
7423         entry->ino = 1;
7424         entry->fattr->valid = 0;
7425
7426         if (decode_attr_bitmap(xdr, bitmap) < 0)
7427                 return -EAGAIN;
7428
7429         if (decode_attr_length(xdr, &len, &savep) < 0)
7430                 return -EAGAIN;
7431
7432         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7433                         NULL, entry->label, entry->server) < 0)
7434                 return -EAGAIN;
7435         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7436                 entry->ino = entry->fattr->mounted_on_fileid;
7437         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7438                 entry->ino = entry->fattr->fileid;
7439
7440         entry->d_type = DT_UNKNOWN;
7441         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7442                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7443
7444         entry->prev_cookie = entry->cookie;
7445         entry->cookie = new_cookie;
7446
7447         return 0;
7448 }
7449
7450 /*
7451  * We need to translate between nfs status return values and
7452  * the local errno values which may not be the same.
7453  */
7454 static struct {
7455         int stat;
7456         int errno;
7457 } nfs_errtbl[] = {
7458         { NFS4_OK,              0               },
7459         { NFS4ERR_PERM,         -EPERM          },
7460         { NFS4ERR_NOENT,        -ENOENT         },
7461         { NFS4ERR_IO,           -errno_NFSERR_IO},
7462         { NFS4ERR_NXIO,         -ENXIO          },
7463         { NFS4ERR_ACCESS,       -EACCES         },
7464         { NFS4ERR_EXIST,        -EEXIST         },
7465         { NFS4ERR_XDEV,         -EXDEV          },
7466         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7467         { NFS4ERR_ISDIR,        -EISDIR         },
7468         { NFS4ERR_INVAL,        -EINVAL         },
7469         { NFS4ERR_FBIG,         -EFBIG          },
7470         { NFS4ERR_NOSPC,        -ENOSPC         },
7471         { NFS4ERR_ROFS,         -EROFS          },
7472         { NFS4ERR_MLINK,        -EMLINK         },
7473         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7474         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7475         { NFS4ERR_DQUOT,        -EDQUOT         },
7476         { NFS4ERR_STALE,        -ESTALE         },
7477         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7478         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7479         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7480         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7481         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7482         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7483         { NFS4ERR_LOCKED,       -EAGAIN         },
7484         { NFS4ERR_SYMLINK,      -ELOOP          },
7485         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7486         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7487         { NFS4ERR_NOXATTR,      -ENODATA        },
7488         { NFS4ERR_XATTR2BIG,    -E2BIG          },
7489         { -1,                   -EIO            }
7490 };
7491
7492 /*
7493  * Convert an NFS error code to a local one.
7494  * This one is used jointly by NFSv2 and NFSv3.
7495  */
7496 static int
7497 nfs4_stat_to_errno(int stat)
7498 {
7499         int i;
7500         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7501                 if (nfs_errtbl[i].stat == stat)
7502                         return nfs_errtbl[i].errno;
7503         }
7504         if (stat <= 10000 || stat > 10100) {
7505                 /* The server is looney tunes. */
7506                 return -EREMOTEIO;
7507         }
7508         /* If we cannot translate the error, the recovery routines should
7509          * handle it.
7510          * Note: remaining NFSv4 error codes have values > 10000, so should
7511          * not conflict with native Linux error codes.
7512          */
7513         return -stat;
7514 }
7515
7516 #ifdef CONFIG_NFS_V4_2
7517 #include "nfs42xdr.c"
7518 #endif /* CONFIG_NFS_V4_2 */
7519
7520 #define PROC(proc, argtype, restype)                            \
7521 [NFSPROC4_CLNT_##proc] = {                                      \
7522         .p_proc   = NFSPROC4_COMPOUND,                          \
7523         .p_encode = nfs4_xdr_##argtype,                         \
7524         .p_decode = nfs4_xdr_##restype,                         \
7525         .p_arglen = NFS4_##argtype##_sz,                        \
7526         .p_replen = NFS4_##restype##_sz,                        \
7527         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7528         .p_name   = #proc,                                      \
7529 }
7530
7531 #define STUB(proc)              \
7532 [NFSPROC4_CLNT_##proc] = {      \
7533         .p_name = #proc,        \
7534 }
7535
7536 #if defined(CONFIG_NFS_V4_1)
7537 #define PROC41(proc, argtype, restype)                          \
7538         PROC(proc, argtype, restype)
7539 #else
7540 #define PROC41(proc, argtype, restype)                          \
7541         STUB(proc)
7542 #endif
7543
7544 #if defined(CONFIG_NFS_V4_2)
7545 #define PROC42(proc, argtype, restype)                          \
7546         PROC(proc, argtype, restype)
7547 #else
7548 #define PROC42(proc, argtype, restype)                          \
7549         STUB(proc)
7550 #endif
7551
7552 const struct rpc_procinfo nfs4_procedures[] = {
7553         PROC(READ,              enc_read,               dec_read),
7554         PROC(WRITE,             enc_write,              dec_write),
7555         PROC(COMMIT,            enc_commit,             dec_commit),
7556         PROC(OPEN,              enc_open,               dec_open),
7557         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7558         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7559         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7560         PROC(CLOSE,             enc_close,              dec_close),
7561         PROC(SETATTR,           enc_setattr,            dec_setattr),
7562         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7563         PROC(RENEW,             enc_renew,              dec_renew),
7564         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7565         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7566         PROC(LOCK,              enc_lock,               dec_lock),
7567         PROC(LOCKT,             enc_lockt,              dec_lockt),
7568         PROC(LOCKU,             enc_locku,              dec_locku),
7569         PROC(ACCESS,            enc_access,             dec_access),
7570         PROC(GETATTR,           enc_getattr,            dec_getattr),
7571         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7572         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7573         PROC(REMOVE,            enc_remove,             dec_remove),
7574         PROC(RENAME,            enc_rename,             dec_rename),
7575         PROC(LINK,              enc_link,               dec_link),
7576         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7577         PROC(CREATE,            enc_create,             dec_create),
7578         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7579         PROC(STATFS,            enc_statfs,             dec_statfs),
7580         PROC(READLINK,          enc_readlink,           dec_readlink),
7581         PROC(READDIR,           enc_readdir,            dec_readdir),
7582         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7583         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7584         PROC(GETACL,            enc_getacl,             dec_getacl),
7585         PROC(SETACL,            enc_setacl,             dec_setacl),
7586         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7587         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7588         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7589         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7590         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7591         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7592         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7593         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7594         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7595         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7596         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7597         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7598         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7599         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7600         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7601         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7602         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7603         STUB(GETDEVICELIST),
7604         PROC41(BIND_CONN_TO_SESSION,
7605                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7606         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7607         PROC42(SEEK,            enc_seek,               dec_seek),
7608         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7609         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7610         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7611         PROC42(CLONE,           enc_clone,              dec_clone),
7612         PROC42(COPY,            enc_copy,               dec_copy),
7613         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7614         PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7615         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7616         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7617         PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7618         PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7619         PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7620         PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7621         PROC42(READ_PLUS,       enc_read_plus,          dec_read_plus),
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  */