fs/nfs/nfs4xdr.c

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