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         __be32 *p;
3172
3173         p = xdr_inline_decode(xdr, 8);
3174         if (unlikely(!p))
3175                 return -EIO;
3176         hdr->status = be32_to_cpup(p++);
3177         hdr->taglen = be32_to_cpup(p);
3178
3179         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3180         if (unlikely(!p))
3181                 return -EIO;
3182         hdr->tag = (char *)p;
3183         p += XDR_QUADLEN(hdr->taglen);
3184         hdr->nops = be32_to_cpup(p);
3185         if (unlikely(hdr->nops < 1))
3186                 return nfs4_stat_to_errno(hdr->status);
3187         return 0;
3188 }
3189
3190 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3191                 int *nfs_retval)
3192 {
3193         __be32 *p;
3194         uint32_t opnum;
3195         int32_t nfserr;
3196
3197         p = xdr_inline_decode(xdr, 8);
3198         if (unlikely(!p))
3199                 goto out_overflow;
3200         opnum = be32_to_cpup(p++);
3201         if (unlikely(opnum != expected))
3202                 goto out_bad_operation;
3203         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3204                 goto out_status;
3205         *nfs_retval = 0;
3206         return true;
3207 out_status:
3208         nfserr = be32_to_cpup(p);
3209         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3210         *nfs_retval = nfs4_stat_to_errno(nfserr);
3211         return true;
3212 out_bad_operation:
3213         trace_nfs4_xdr_bad_operation(xdr, opnum, expected);
3214         *nfs_retval = -EREMOTEIO;
3215         return false;
3216 out_overflow:
3217         *nfs_retval = -EIO;
3218         return false;
3219 }
3220
3221 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3222 {
3223         int retval;
3224
3225         __decode_op_hdr(xdr, expected, &retval);
3226         return retval;
3227 }
3228
3229 /* Dummy routine */
3230 static int decode_ace(struct xdr_stream *xdr, void *ace)
3231 {
3232         __be32 *p;
3233         unsigned int strlen;
3234         char *str;
3235
3236         p = xdr_inline_decode(xdr, 12);
3237         if (unlikely(!p))
3238                 return -EIO;
3239         return decode_opaque_inline(xdr, &strlen, &str);
3240 }
3241
3242 static ssize_t
3243 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3244 {
3245         ssize_t ret;
3246
3247         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3248         if (likely(ret >= 0))
3249                 return ret;
3250         if (ret != -EMSGSIZE)
3251                 return -EIO;
3252         return sz;
3253 }
3254
3255 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3256 {
3257         ssize_t ret;
3258         ret = decode_bitmap4(xdr, bitmap, 3);
3259         return ret < 0 ? ret : 0;
3260 }
3261
3262 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3263 {
3264         __be32 *p;
3265
3266         p = xdr_inline_decode(xdr, 4);
3267         if (unlikely(!p))
3268                 return -EIO;
3269         *attrlen = be32_to_cpup(p);
3270         *savep = xdr_stream_pos(xdr);
3271         return 0;
3272 }
3273
3274 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3275 {
3276         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3277                 int ret;
3278                 ret = decode_attr_bitmap(xdr, bitmask);
3279                 if (unlikely(ret < 0))
3280                         return ret;
3281                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3282         } else
3283                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3284         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3285                 bitmask[0], bitmask[1], bitmask[2]);
3286         return 0;
3287 }
3288
3289 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3290 {
3291         __be32 *p;
3292         int ret = 0;
3293
3294         *type = 0;
3295         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3296                 return -EIO;
3297         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3298                 p = xdr_inline_decode(xdr, 4);
3299                 if (unlikely(!p))
3300                         return -EIO;
3301                 *type = be32_to_cpup(p);
3302                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3303                         dprintk("%s: bad type %d\n", __func__, *type);
3304                         return -EIO;
3305                 }
3306                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3307                 ret = NFS_ATTR_FATTR_TYPE;
3308         }
3309         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3310         return ret;
3311 }
3312
3313 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3314                                       uint32_t *bitmap, uint32_t *type)
3315 {
3316         __be32 *p;
3317
3318         *type = 0;
3319         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3320                 return -EIO;
3321         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3322                 p = xdr_inline_decode(xdr, 4);
3323                 if (unlikely(!p))
3324                         return -EIO;
3325                 *type = be32_to_cpup(p);
3326                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3327         }
3328         dprintk("%s: expire type=0x%x\n", __func__, *type);
3329         return 0;
3330 }
3331
3332 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3333 {
3334         __be32 *p;
3335         int ret = 0;
3336
3337         *change = 0;
3338         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3339                 return -EIO;
3340         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3341                 p = xdr_inline_decode(xdr, 8);
3342                 if (unlikely(!p))
3343                         return -EIO;
3344                 xdr_decode_hyper(p, change);
3345                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3346                 ret = NFS_ATTR_FATTR_CHANGE;
3347         }
3348         dprintk("%s: change attribute=%Lu\n", __func__,
3349                         (unsigned long long)*change);
3350         return ret;
3351 }
3352
3353 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3354 {
3355         __be32 *p;
3356         int ret = 0;
3357
3358         *size = 0;
3359         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3360                 return -EIO;
3361         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3362                 p = xdr_inline_decode(xdr, 8);
3363                 if (unlikely(!p))
3364                         return -EIO;
3365                 xdr_decode_hyper(p, size);
3366                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3367                 ret = NFS_ATTR_FATTR_SIZE;
3368         }
3369         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3370         return ret;
3371 }
3372
3373 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3374 {
3375         __be32 *p;
3376
3377         *res = 0;
3378         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3379                 return -EIO;
3380         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3381                 p = xdr_inline_decode(xdr, 4);
3382                 if (unlikely(!p))
3383                         return -EIO;
3384                 *res = be32_to_cpup(p);
3385                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3386         }
3387         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3388         return 0;
3389 }
3390
3391 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3392 {
3393         __be32 *p;
3394
3395         *res = 0;
3396         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3397                 return -EIO;
3398         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3399                 p = xdr_inline_decode(xdr, 4);
3400                 if (unlikely(!p))
3401                         return -EIO;
3402                 *res = be32_to_cpup(p);
3403                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3404         }
3405         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3406         return 0;
3407 }
3408
3409 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3410 {
3411         __be32 *p;
3412         int ret = 0;
3413
3414         fsid->major = 0;
3415         fsid->minor = 0;
3416         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3417                 return -EIO;
3418         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3419                 p = xdr_inline_decode(xdr, 16);
3420                 if (unlikely(!p))
3421                         return -EIO;
3422                 p = xdr_decode_hyper(p, &fsid->major);
3423                 xdr_decode_hyper(p, &fsid->minor);
3424                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3425                 ret = NFS_ATTR_FATTR_FSID;
3426         }
3427         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3428                         (unsigned long long)fsid->major,
3429                         (unsigned long long)fsid->minor);
3430         return ret;
3431 }
3432
3433 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3434 {
3435         __be32 *p;
3436
3437         *res = 60;
3438         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3439                 return -EIO;
3440         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3441                 p = xdr_inline_decode(xdr, 4);
3442                 if (unlikely(!p))
3443                         return -EIO;
3444                 *res = be32_to_cpup(p);
3445                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3446         }
3447         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3448         return 0;
3449 }
3450
3451 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3452 {
3453         __be32 *p;
3454
3455         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3456                 return -EIO;
3457         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3458                 p = xdr_inline_decode(xdr, 4);
3459                 if (unlikely(!p))
3460                         return -EIO;
3461                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3462                 *res = -be32_to_cpup(p);
3463         }
3464         return 0;
3465 }
3466
3467 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3468                                  uint32_t *bitmap, uint32_t *bitmask)
3469 {
3470         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3471                 int ret;
3472                 ret = decode_attr_bitmap(xdr, bitmask);
3473                 if (unlikely(ret < 0))
3474                         return ret;
3475                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3476         } else
3477                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3478         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3479                 bitmask[0], bitmask[1], bitmask[2]);
3480         return 0;
3481 }
3482
3483 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3484 {
3485         __be32 *p;
3486         u32 len;
3487
3488         if (fh != NULL)
3489                 memset(fh, 0, sizeof(*fh));
3490
3491         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3492                 return -EIO;
3493         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3494                 p = xdr_inline_decode(xdr, 4);
3495                 if (unlikely(!p))
3496                         return -EIO;
3497                 len = be32_to_cpup(p);
3498                 if (len > NFS4_FHSIZE || len == 0) {
3499                         trace_nfs4_xdr_bad_filehandle(xdr, OP_READDIR,
3500                                                       NFS4ERR_BADHANDLE);
3501                         return -EREMOTEIO;
3502                 }
3503                 p = xdr_inline_decode(xdr, len);
3504                 if (unlikely(!p))
3505                         return -EIO;
3506                 if (fh != NULL) {
3507                         memcpy(fh->data, p, len);
3508                         fh->size = len;
3509                 }
3510                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3511         }
3512         return 0;
3513 }
3514
3515 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3516 {
3517         __be32 *p;
3518
3519         *res = 0;
3520         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3521                 return -EIO;
3522         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3523                 p = xdr_inline_decode(xdr, 4);
3524                 if (unlikely(!p))
3525                         return -EIO;
3526                 *res = be32_to_cpup(p);
3527                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3528         }
3529         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3530         return 0;
3531 }
3532
3533 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3534 {
3535         __be32 *p;
3536         int ret = 0;
3537
3538         *fileid = 0;
3539         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3540                 return -EIO;
3541         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3542                 p = xdr_inline_decode(xdr, 8);
3543                 if (unlikely(!p))
3544                         return -EIO;
3545                 xdr_decode_hyper(p, fileid);
3546                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3547                 ret = NFS_ATTR_FATTR_FILEID;
3548         }
3549         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3550         return ret;
3551 }
3552
3553 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3554 {
3555         __be32 *p;
3556         int ret = 0;
3557
3558         *fileid = 0;
3559         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3560                 return -EIO;
3561         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3562                 p = xdr_inline_decode(xdr, 8);
3563                 if (unlikely(!p))
3564                         return -EIO;
3565                 xdr_decode_hyper(p, fileid);
3566                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3567                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3568         }
3569         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3570         return ret;
3571 }
3572
3573 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3574 {
3575         __be32 *p;
3576         int status = 0;
3577
3578         *res = 0;
3579         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3580                 return -EIO;
3581         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3582                 p = xdr_inline_decode(xdr, 8);
3583                 if (unlikely(!p))
3584                         return -EIO;
3585                 xdr_decode_hyper(p, res);
3586                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3587         }
3588         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3589         return status;
3590 }
3591
3592 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3593 {
3594         __be32 *p;
3595         int status = 0;
3596
3597         *res = 0;
3598         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3599                 return -EIO;
3600         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3601                 p = xdr_inline_decode(xdr, 8);
3602                 if (unlikely(!p))
3603                         return -EIO;
3604                 xdr_decode_hyper(p, res);
3605                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3606         }
3607         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3608         return status;
3609 }
3610
3611 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3612 {
3613         __be32 *p;
3614         int status = 0;
3615
3616         *res = 0;
3617         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3618                 return -EIO;
3619         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3620                 p = xdr_inline_decode(xdr, 8);
3621                 if (unlikely(!p))
3622                         return -EIO;
3623                 xdr_decode_hyper(p, res);
3624                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3625         }
3626         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3627         return status;
3628 }
3629
3630 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3631 {
3632         u32 n;
3633         __be32 *p;
3634         int status = 0;
3635
3636         p = xdr_inline_decode(xdr, 4);
3637         if (unlikely(!p))
3638                 return -EIO;
3639         n = be32_to_cpup(p);
3640         if (n == 0)
3641                 goto root_path;
3642         dprintk("pathname4: ");
3643         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3644                 dprintk("cannot parse %d components in path\n", n);
3645                 goto out_eio;
3646         }
3647         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3648                 struct nfs4_string *component = &path->components[path->ncomponents];
3649                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3650                 if (unlikely(status != 0))
3651                         goto out_eio;
3652                 ifdebug (XDR)
3653                         pr_cont("%s%.*s ",
3654                                 (path->ncomponents != n ? "/ " : ""),
3655                                 component->len, component->data);
3656         }
3657 out:
3658         return status;
3659 root_path:
3660 /* a root pathname is sent as a zero component4 */
3661         path->ncomponents = 1;
3662         path->components[0].len=0;
3663         path->components[0].data=NULL;
3664         dprintk("pathname4: /\n");
3665         goto out;
3666 out_eio:
3667         dprintk(" status %d", status);
3668         status = -EIO;
3669         goto out;
3670 }
3671
3672 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3673 {
3674         int n;
3675         __be32 *p;
3676         int status = -EIO;
3677
3678         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3679                 goto out;
3680         status = 0;
3681         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3682                 goto out;
3683         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3684         status = -EIO;
3685         /* Ignore borken servers that return unrequested attrs */
3686         if (unlikely(res == NULL))
3687                 goto out;
3688         dprintk("%s: fsroot:\n", __func__);
3689         status = decode_pathname(xdr, &res->fs_path);
3690         if (unlikely(status != 0))
3691                 goto out;
3692         p = xdr_inline_decode(xdr, 4);
3693         if (unlikely(!p))
3694                 goto out_eio;
3695         n = be32_to_cpup(p);
3696         if (n <= 0)
3697                 goto out_eio;
3698         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3699                 u32 m;
3700                 struct nfs4_fs_location *loc;
3701
3702                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3703                         break;
3704                 loc = &res->locations[res->nlocations];
3705                 p = xdr_inline_decode(xdr, 4);
3706                 if (unlikely(!p))
3707                         goto out_eio;
3708                 m = be32_to_cpup(p);
3709
3710                 dprintk("%s: servers:\n", __func__);
3711                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3712                         struct nfs4_string *server;
3713
3714                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3715                                 unsigned int i;
3716                                 dprintk("%s: using first %u of %u servers "
3717                                         "returned for location %u\n",
3718                                                 __func__,
3719                                                 NFS4_FS_LOCATION_MAXSERVERS,
3720                                                 m, res->nlocations);
3721                                 for (i = loc->nservers; i < m; i++) {
3722                                         unsigned int len;
3723                                         char *data;
3724                                         status = decode_opaque_inline(xdr, &len, &data);
3725                                         if (unlikely(status != 0))
3726                                                 goto out_eio;
3727                                 }
3728                                 break;
3729                         }
3730                         server = &loc->servers[loc->nservers];
3731                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3732                         if (unlikely(status != 0))
3733                                 goto out_eio;
3734                         dprintk("%s ", server->data);
3735                 }
3736                 status = decode_pathname(xdr, &loc->rootpath);
3737                 if (unlikely(status != 0))
3738                         goto out_eio;
3739         }
3740         if (res->nlocations != 0)
3741                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3742 out:
3743         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3744         return status;
3745 out_eio:
3746         status = -EIO;
3747         goto out;
3748 }
3749
3750 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3751 {
3752         __be32 *p;
3753         int status = 0;
3754
3755         *res = 0;
3756         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3757                 return -EIO;
3758         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3759                 p = xdr_inline_decode(xdr, 8);
3760                 if (unlikely(!p))
3761                         return -EIO;
3762                 xdr_decode_hyper(p, res);
3763                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3764         }
3765         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3766         return status;
3767 }
3768
3769 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3770 {
3771         __be32 *p;
3772         int status = 0;
3773
3774         *maxlink = 1;
3775         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3776                 return -EIO;
3777         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3778                 p = xdr_inline_decode(xdr, 4);
3779                 if (unlikely(!p))
3780                         return -EIO;
3781                 *maxlink = be32_to_cpup(p);
3782                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3783         }
3784         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3785         return status;
3786 }
3787
3788 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3789 {
3790         __be32 *p;
3791         int status = 0;
3792
3793         *maxname = 1024;
3794         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3795                 return -EIO;
3796         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3797                 p = xdr_inline_decode(xdr, 4);
3798                 if (unlikely(!p))
3799                         return -EIO;
3800                 *maxname = be32_to_cpup(p);
3801                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3802         }
3803         dprintk("%s: maxname=%u\n", __func__, *maxname);
3804         return status;
3805 }
3806
3807 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3808 {
3809         __be32 *p;
3810         int status = 0;
3811
3812         *res = 1024;
3813         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3814                 return -EIO;
3815         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3816                 uint64_t maxread;
3817                 p = xdr_inline_decode(xdr, 8);
3818                 if (unlikely(!p))
3819                         return -EIO;
3820                 xdr_decode_hyper(p, &maxread);
3821                 if (maxread > 0x7FFFFFFF)
3822                         maxread = 0x7FFFFFFF;
3823                 *res = (uint32_t)maxread;
3824                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3825         }
3826         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3827         return status;
3828 }
3829
3830 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3831 {
3832         __be32 *p;
3833         int status = 0;
3834
3835         *res = 1024;
3836         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3837                 return -EIO;
3838         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3839                 uint64_t maxwrite;
3840                 p = xdr_inline_decode(xdr, 8);
3841                 if (unlikely(!p))
3842                         return -EIO;
3843                 xdr_decode_hyper(p, &maxwrite);
3844                 if (maxwrite > 0x7FFFFFFF)
3845                         maxwrite = 0x7FFFFFFF;
3846                 *res = (uint32_t)maxwrite;
3847                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3848         }
3849         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3850         return status;
3851 }
3852
3853 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3854 {
3855         uint32_t tmp;
3856         __be32 *p;
3857         int ret = 0;
3858
3859         *mode = 0;
3860         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3861                 return -EIO;
3862         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3863                 p = xdr_inline_decode(xdr, 4);
3864                 if (unlikely(!p))
3865                         return -EIO;
3866                 tmp = be32_to_cpup(p);
3867                 *mode = tmp & ~S_IFMT;
3868                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3869                 ret = NFS_ATTR_FATTR_MODE;
3870         }
3871         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3872         return ret;
3873 }
3874
3875 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3876 {
3877         __be32 *p;
3878         int ret = 0;
3879
3880         *nlink = 1;
3881         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3882                 return -EIO;
3883         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3884                 p = xdr_inline_decode(xdr, 4);
3885                 if (unlikely(!p))
3886                         return -EIO;
3887                 *nlink = be32_to_cpup(p);
3888                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3889                 ret = NFS_ATTR_FATTR_NLINK;
3890         }
3891         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3892         return ret;
3893 }
3894
3895 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3896                 struct nfs4_string *name, gfp_t gfp_flags)
3897 {
3898         ssize_t ret;
3899
3900         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3901                         XDR_MAX_NETOBJ, gfp_flags);
3902         name->len = 0;
3903         if (ret > 0)
3904                 name->len = ret;
3905         return ret;
3906 }
3907
3908 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3909                 const struct nfs_server *server, kuid_t *uid,
3910                 struct nfs4_string *owner_name)
3911 {
3912         ssize_t len;
3913         char *p;
3914
3915         *uid = make_kuid(&init_user_ns, -2);
3916         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3917                 return -EIO;
3918         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3919                 return 0;
3920         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3921
3922         if (owner_name != NULL) {
3923                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3924                 if (len <= 0)
3925                         goto out;
3926                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3927                 return NFS_ATTR_FATTR_OWNER_NAME;
3928         } else {
3929                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3930                                 XDR_MAX_NETOBJ);
3931                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3932                         goto out;
3933                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3934                 return NFS_ATTR_FATTR_OWNER;
3935         }
3936 out:
3937         if (len == -EBADMSG)
3938                 return -EIO;
3939         return 0;
3940 }
3941
3942 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3943                 const struct nfs_server *server, kgid_t *gid,
3944                 struct nfs4_string *group_name)
3945 {
3946         ssize_t len;
3947         char *p;
3948
3949         *gid = make_kgid(&init_user_ns, -2);
3950         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3951                 return -EIO;
3952         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3953                 return 0;
3954         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3955
3956         if (group_name != NULL) {
3957                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3958                 if (len <= 0)
3959                         goto out;
3960                 dprintk("%s: name=%s\n", __func__, group_name->data);
3961                 return NFS_ATTR_FATTR_GROUP_NAME;
3962         } else {
3963                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3964                                 XDR_MAX_NETOBJ);
3965                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3966                         goto out;
3967                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3968                 return NFS_ATTR_FATTR_GROUP;
3969         }
3970 out:
3971         if (len == -EBADMSG)
3972                 return -EIO;
3973         return 0;
3974 }
3975
3976 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3977 {
3978         uint32_t major = 0, minor = 0;
3979         __be32 *p;
3980         int ret = 0;
3981
3982         *rdev = MKDEV(0,0);
3983         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3984                 return -EIO;
3985         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3986                 dev_t tmp;
3987
3988                 p = xdr_inline_decode(xdr, 8);
3989                 if (unlikely(!p))
3990                         return -EIO;
3991                 major = be32_to_cpup(p++);
3992                 minor = be32_to_cpup(p);
3993                 tmp = MKDEV(major, minor);
3994                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3995                         *rdev = tmp;
3996                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3997                 ret = NFS_ATTR_FATTR_RDEV;
3998         }
3999         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4000         return ret;
4001 }
4002
4003 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4004 {
4005         __be32 *p;
4006         int status = 0;
4007
4008         *res = 0;
4009         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4010                 return -EIO;
4011         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4012                 p = xdr_inline_decode(xdr, 8);
4013                 if (unlikely(!p))
4014                         return -EIO;
4015                 xdr_decode_hyper(p, res);
4016                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4017         }
4018         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4019         return status;
4020 }
4021
4022 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4023 {
4024         __be32 *p;
4025         int status = 0;
4026
4027         *res = 0;
4028         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4029                 return -EIO;
4030         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4031                 p = xdr_inline_decode(xdr, 8);
4032                 if (unlikely(!p))
4033                         return -EIO;
4034                 xdr_decode_hyper(p, res);
4035                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4036         }
4037         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4038         return status;
4039 }
4040
4041 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4042 {
4043         __be32 *p;
4044         int status = 0;
4045
4046         *res = 0;
4047         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4048                 return -EIO;
4049         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4050                 p = xdr_inline_decode(xdr, 8);
4051                 if (unlikely(!p))
4052                         return -EIO;
4053                 xdr_decode_hyper(p, res);
4054                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4055         }
4056         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4057         return status;
4058 }
4059
4060 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4061 {
4062         __be32 *p;
4063         int ret = 0;
4064
4065         *used = 0;
4066         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4067                 return -EIO;
4068         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4069                 p = xdr_inline_decode(xdr, 8);
4070                 if (unlikely(!p))
4071                         return -EIO;
4072                 xdr_decode_hyper(p, used);
4073                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4074                 ret = NFS_ATTR_FATTR_SPACE_USED;
4075         }
4076         dprintk("%s: space used=%Lu\n", __func__,
4077                         (unsigned long long)*used);
4078         return ret;
4079 }
4080
4081 static __be32 *
4082 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4083 {
4084         __u64 sec;
4085
4086         p = xdr_decode_hyper(p, &sec);
4087         t-> tv_sec = sec;
4088         t->tv_nsec = be32_to_cpup(p++);
4089         return p;
4090 }
4091
4092 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4093 {
4094         __be32 *p;
4095
4096         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4097         if (unlikely(!p))
4098                 return -EIO;
4099         xdr_decode_nfstime4(p, time);
4100         return 0;
4101 }
4102
4103 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4104 {
4105         int status = 0;
4106
4107         time->tv_sec = 0;
4108         time->tv_nsec = 0;
4109         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4110                 return -EIO;
4111         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4112                 status = decode_attr_time(xdr, time);
4113                 if (status == 0)
4114                         status = NFS_ATTR_FATTR_ATIME;
4115                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4116         }
4117         dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4118         return status;
4119 }
4120
4121 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4122 {
4123         int status = 0;
4124
4125         time->tv_sec = 0;
4126         time->tv_nsec = 0;
4127         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4128                 return -EIO;
4129         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4130                 status = decode_attr_time(xdr, time);
4131                 if (status == 0)
4132                         status = NFS_ATTR_FATTR_CTIME;
4133                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4134         }
4135         dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4136         return status;
4137 }
4138
4139 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4140                                   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_DELTA - 1U)))
4147                 return -EIO;
4148         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4149                 status = decode_attr_time(xdr, time);
4150                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4151         }
4152         dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4153                 time->tv_nsec);
4154         return status;
4155 }
4156
4157 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4158                                         struct nfs4_label *label)
4159 {
4160         uint32_t pi = 0;
4161         uint32_t lfs = 0;
4162         __u32 len;
4163         __be32 *p;
4164         int status = 0;
4165
4166         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4167                 return -EIO;
4168         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4169                 p = xdr_inline_decode(xdr, 4);
4170                 if (unlikely(!p))
4171                         return -EIO;
4172                 lfs = be32_to_cpup(p++);
4173                 p = xdr_inline_decode(xdr, 4);
4174                 if (unlikely(!p))
4175                         return -EIO;
4176                 pi = be32_to_cpup(p++);
4177                 p = xdr_inline_decode(xdr, 4);
4178                 if (unlikely(!p))
4179                         return -EIO;
4180                 len = be32_to_cpup(p++);
4181                 p = xdr_inline_decode(xdr, len);
4182                 if (unlikely(!p))
4183                         return -EIO;
4184                 if (len < NFS4_MAXLABELLEN) {
4185                         if (label) {
4186                                 if (label->len) {
4187                                         if (label->len < len)
4188                                                 return -ERANGE;
4189                                         memcpy(label->label, p, len);
4190                                 }
4191                                 label->len = len;
4192                                 label->pi = pi;
4193                                 label->lfs = lfs;
4194                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4195                         }
4196                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4197                 } else
4198                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4199                                         __func__, len);
4200         }
4201         if (label && label->label)
4202                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4203                         (char *)label->label, label->len, label->pi, label->lfs);
4204         return status;
4205 }
4206
4207 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4208 {
4209         int status = 0;
4210
4211         time->tv_sec = 0;
4212         time->tv_nsec = 0;
4213         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4214                 return -EIO;
4215         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4216                 status = decode_attr_time(xdr, time);
4217                 if (status == 0)
4218                         status = NFS_ATTR_FATTR_MTIME;
4219                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4220         }
4221         dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4222         return status;
4223 }
4224
4225 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4226                                     uint32_t *res)
4227 {
4228         __be32 *p;
4229
4230         *res = 0;
4231         if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4232                 return -EIO;
4233         if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4234                 p = xdr_inline_decode(xdr, 4);
4235                 if (unlikely(!p))
4236                         return -EIO;
4237                 *res = be32_to_cpup(p);
4238                 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4239         }
4240         dprintk("%s: XATTR support=%s\n", __func__,
4241                 *res == 0 ? "false" : "true");
4242         return 0;
4243 }
4244
4245 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4246 {
4247         unsigned int attrwords = XDR_QUADLEN(attrlen);
4248         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4249
4250         if (unlikely(attrwords != nwords)) {
4251                 dprintk("%s: server returned incorrect attribute length: "
4252                         "%u %c %u\n",
4253                                 __func__,
4254                                 attrwords << 2,
4255                                 (attrwords < nwords) ? '<' : '>',
4256                                 nwords << 2);
4257                 return -EIO;
4258         }
4259         return 0;
4260 }
4261
4262 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4263 {
4264         __be32 *p;
4265
4266         p = xdr_inline_decode(xdr, 20);
4267         if (unlikely(!p))
4268                 return -EIO;
4269         cinfo->atomic = be32_to_cpup(p++);
4270         p = xdr_decode_hyper(p, &cinfo->before);
4271         xdr_decode_hyper(p, &cinfo->after);
4272         return 0;
4273 }
4274
4275 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4276 {
4277         __be32 *p;
4278         uint32_t supp, acc;
4279         int status;
4280
4281         status = decode_op_hdr(xdr, OP_ACCESS);
4282         if (status)
4283                 return status;
4284         p = xdr_inline_decode(xdr, 8);
4285         if (unlikely(!p))
4286                 return -EIO;
4287         supp = be32_to_cpup(p++);
4288         acc = be32_to_cpup(p);
4289         *supported = supp;
4290         *access = acc;
4291         return 0;
4292 }
4293
4294 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4295 {
4296         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4297         if (unlikely(ret < 0))
4298                 return -EIO;
4299         return 0;
4300 }
4301
4302 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4303 {
4304         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4305 }
4306
4307 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4308 {
4309         stateid->type = NFS4_OPEN_STATEID_TYPE;
4310         return decode_stateid(xdr, stateid);
4311 }
4312
4313 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4314 {
4315         stateid->type = NFS4_LOCK_STATEID_TYPE;
4316         return decode_stateid(xdr, stateid);
4317 }
4318
4319 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4320 {
4321         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4322         return decode_stateid(xdr, stateid);
4323 }
4324
4325 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4326 {
4327         nfs4_stateid dummy;
4328
4329         nfs4_stateid_copy(stateid, &invalid_stateid);
4330         return decode_stateid(xdr, &dummy);
4331 }
4332
4333 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4334 {
4335         int status;
4336
4337         status = decode_op_hdr(xdr, OP_CLOSE);
4338         if (status != -EIO)
4339                 nfs_increment_open_seqid(status, res->seqid);
4340         if (!status)
4341                 status = decode_invalid_stateid(xdr, &res->stateid);
4342         return status;
4343 }
4344
4345 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4346 {
4347         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4348 }
4349
4350 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4351 {
4352         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4353 }
4354
4355 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4356 {
4357         struct nfs_writeverf *verf = res->verf;
4358         int status;
4359
4360         status = decode_op_hdr(xdr, OP_COMMIT);
4361         if (!status)
4362                 status = decode_write_verifier(xdr, &verf->verifier);
4363         if (!status)
4364                 verf->committed = NFS_FILE_SYNC;
4365         return status;
4366 }
4367
4368 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4369 {
4370         __be32 *p;
4371         uint32_t bmlen;
4372         int status;
4373
4374         status = decode_op_hdr(xdr, OP_CREATE);
4375         if (status)
4376                 return status;
4377         if ((status = decode_change_info(xdr, cinfo)))
4378                 return status;
4379         p = xdr_inline_decode(xdr, 4);
4380         if (unlikely(!p))
4381                 return -EIO;
4382         bmlen = be32_to_cpup(p);
4383         p = xdr_inline_decode(xdr, bmlen << 2);
4384         if (likely(p))
4385                 return 0;
4386         return -EIO;
4387 }
4388
4389 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4390 {
4391         unsigned int savep;
4392         uint32_t attrlen, bitmap[3] = {0};
4393         int status;
4394
4395         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4396                 goto xdr_error;
4397         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4398                 goto xdr_error;
4399         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4400                 goto xdr_error;
4401         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4402                 goto xdr_error;
4403         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4404                                                  &res->fh_expire_type)) != 0)
4405                 goto xdr_error;
4406         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4407                 goto xdr_error;
4408         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4409                 goto xdr_error;
4410         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4411                 goto xdr_error;
4412         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4413                                 res->exclcreat_bitmask)) != 0)
4414                 goto xdr_error;
4415         status = verify_attr_len(xdr, savep, attrlen);
4416 xdr_error:
4417         dprintk("%s: xdr returned %d!\n", __func__, -status);
4418         return status;
4419 }
4420
4421 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4422 {
4423         unsigned int savep;
4424         uint32_t attrlen, bitmap[3] = {0};
4425         int status;
4426
4427         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4428                 goto xdr_error;
4429         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4430                 goto xdr_error;
4431         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4432                 goto xdr_error;
4433
4434         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4435                 goto xdr_error;
4436         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4437                 goto xdr_error;
4438         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4439                 goto xdr_error;
4440
4441         status = -EIO;
4442         if (unlikely(bitmap[0]))
4443                 goto xdr_error;
4444
4445         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4446                 goto xdr_error;
4447         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4448                 goto xdr_error;
4449         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4450                 goto xdr_error;
4451
4452         status = verify_attr_len(xdr, savep, attrlen);
4453 xdr_error:
4454         dprintk("%s: xdr returned %d!\n", __func__, -status);
4455         return status;
4456 }
4457
4458 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4459 {
4460         unsigned int savep;
4461         uint32_t attrlen, bitmap[3] = {0};
4462         int status;
4463
4464         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4465                 goto xdr_error;
4466         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4467                 goto xdr_error;
4468         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4469                 goto xdr_error;
4470
4471         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4472                 goto xdr_error;
4473         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4474                 goto xdr_error;
4475
4476         status = verify_attr_len(xdr, savep, attrlen);
4477 xdr_error:
4478         dprintk("%s: xdr returned %d!\n", __func__, -status);
4479         return status;
4480 }
4481
4482 static int decode_threshold_hint(struct xdr_stream *xdr,
4483                                   uint32_t *bitmap,
4484                                   uint64_t *res,
4485                                   uint32_t hint_bit)
4486 {
4487         __be32 *p;
4488
4489         *res = 0;
4490         if (likely(bitmap[0] & hint_bit)) {
4491                 p = xdr_inline_decode(xdr, 8);
4492                 if (unlikely(!p))
4493                         return -EIO;
4494                 xdr_decode_hyper(p, res);
4495         }
4496         return 0;
4497 }
4498
4499 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4500                                         struct nfs4_threshold *res)
4501 {
4502         __be32 *p;
4503         unsigned int savep;
4504         uint32_t bitmap[3] = {0,}, attrlen;
4505         int status;
4506
4507         /* layout type */
4508         p = xdr_inline_decode(xdr, 4);
4509         if (unlikely(!p))
4510                 return -EIO;
4511         res->l_type = be32_to_cpup(p);
4512
4513         /* thi_hintset bitmap */
4514         status = decode_attr_bitmap(xdr, bitmap);
4515         if (status < 0)
4516                 goto xdr_error;
4517
4518         /* thi_hintlist length */
4519         status = decode_attr_length(xdr, &attrlen, &savep);
4520         if (status < 0)
4521                 goto xdr_error;
4522         /* thi_hintlist */
4523         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4524         if (status < 0)
4525                 goto xdr_error;
4526         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4527         if (status < 0)
4528                 goto xdr_error;
4529         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4530                                        THRESHOLD_RD_IO);
4531         if (status < 0)
4532                 goto xdr_error;
4533         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4534                                        THRESHOLD_WR_IO);
4535         if (status < 0)
4536                 goto xdr_error;
4537
4538         status = verify_attr_len(xdr, savep, attrlen);
4539         res->bm = bitmap[0];
4540
4541         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4542                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4543                 res->wr_io_sz);
4544 xdr_error:
4545         dprintk("%s ret=%d!\n", __func__, status);
4546         return status;
4547 }
4548
4549 /*
4550  * Thresholds on pNFS direct I/O vrs MDS I/O
4551  */
4552 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4553                                     uint32_t *bitmap,
4554                                     struct nfs4_threshold *res)
4555 {
4556         __be32 *p;
4557         int status = 0;
4558         uint32_t num;
4559
4560         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4561                 return -EIO;
4562         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4563                 /* Did the server return an unrequested attribute? */
4564                 if (unlikely(res == NULL))
4565                         return -EREMOTEIO;
4566                 p = xdr_inline_decode(xdr, 4);
4567                 if (unlikely(!p))
4568                         return -EIO;
4569                 num = be32_to_cpup(p);
4570                 if (num == 0)
4571                         return 0;
4572                 if (num > 1)
4573                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4574                                 "drivers per filesystem not supported\n",
4575                                 __func__);
4576
4577                 status = decode_first_threshold_item4(xdr, res);
4578                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4579         }
4580         return status;
4581 }
4582
4583 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4584                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4585                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4586                 const struct nfs_server *server)
4587 {
4588         int status;
4589         umode_t fmode = 0;
4590         uint32_t type;
4591         int32_t err;
4592
4593         status = decode_attr_type(xdr, bitmap, &type);
4594         if (status < 0)
4595                 goto xdr_error;
4596         fattr->mode = 0;
4597         if (status != 0) {
4598                 fattr->mode |= nfs_type2fmt[type];
4599                 fattr->valid |= status;
4600         }
4601
4602         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4603         if (status < 0)
4604                 goto xdr_error;
4605         fattr->valid |= status;
4606
4607         status = decode_attr_size(xdr, bitmap, &fattr->size);
4608         if (status < 0)
4609                 goto xdr_error;
4610         fattr->valid |= status;
4611
4612         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4613         if (status < 0)
4614                 goto xdr_error;
4615         fattr->valid |= status;
4616
4617         err = 0;
4618         status = decode_attr_error(xdr, bitmap, &err);
4619         if (status < 0)
4620                 goto xdr_error;
4621
4622         status = decode_attr_filehandle(xdr, bitmap, fh);
4623         if (status < 0)
4624                 goto xdr_error;
4625
4626         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4627         if (status < 0)
4628                 goto xdr_error;
4629         fattr->valid |= status;
4630
4631         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4632         if (status < 0)
4633                 goto xdr_error;
4634         fattr->valid |= status;
4635
4636         status = -EIO;
4637         if (unlikely(bitmap[0]))
4638                 goto xdr_error;
4639
4640         status = decode_attr_mode(xdr, bitmap, &fmode);
4641         if (status < 0)
4642                 goto xdr_error;
4643         if (status != 0) {
4644                 fattr->mode |= fmode;
4645                 fattr->valid |= status;
4646         }
4647
4648         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4649         if (status < 0)
4650                 goto xdr_error;
4651         fattr->valid |= status;
4652
4653         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4654         if (status < 0)
4655                 goto xdr_error;
4656         fattr->valid |= status;
4657
4658         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4659         if (status < 0)
4660                 goto xdr_error;
4661         fattr->valid |= status;
4662
4663         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4664         if (status < 0)
4665                 goto xdr_error;
4666         fattr->valid |= status;
4667
4668         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4669         if (status < 0)
4670                 goto xdr_error;
4671         fattr->valid |= status;
4672
4673         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4674         if (status < 0)
4675                 goto xdr_error;
4676         fattr->valid |= status;
4677
4678         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4679         if (status < 0)
4680                 goto xdr_error;
4681         fattr->valid |= status;
4682
4683         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4684         if (status < 0)
4685                 goto xdr_error;
4686         fattr->valid |= status;
4687
4688         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4689         if (status < 0)
4690                 goto xdr_error;
4691         fattr->valid |= status;
4692
4693         status = -EIO;
4694         if (unlikely(bitmap[1]))
4695                 goto xdr_error;
4696
4697         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4698         if (status < 0)
4699                 goto xdr_error;
4700
4701         if (label) {
4702                 status = decode_attr_security_label(xdr, bitmap, label);
4703                 if (status < 0)
4704                         goto xdr_error;
4705                 fattr->valid |= status;
4706         }
4707
4708 xdr_error:
4709         dprintk("%s: xdr returned %d\n", __func__, -status);
4710         return status;
4711 }
4712
4713 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4714                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4715                 struct nfs4_label *label, const struct nfs_server *server)
4716 {
4717         unsigned int savep;
4718         uint32_t attrlen,
4719                  bitmap[3] = {0};
4720         int status;
4721
4722         status = decode_op_hdr(xdr, OP_GETATTR);
4723         if (status < 0)
4724                 goto xdr_error;
4725
4726         status = decode_attr_bitmap(xdr, bitmap);
4727         if (status < 0)
4728                 goto xdr_error;
4729
4730         status = decode_attr_length(xdr, &attrlen, &savep);
4731         if (status < 0)
4732                 goto xdr_error;
4733
4734         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4735                                         label, server);
4736         if (status < 0)
4737                 goto xdr_error;
4738
4739         status = verify_attr_len(xdr, savep, attrlen);
4740 xdr_error:
4741         dprintk("%s: xdr returned %d\n", __func__, -status);
4742         return status;
4743 }
4744
4745 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4746                 struct nfs4_label *label, const struct nfs_server *server)
4747 {
4748         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4749 }
4750
4751 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4752                 const struct nfs_server *server)
4753 {
4754         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4755 }
4756
4757 /*
4758  * Decode potentially multiple layout types.
4759  */
4760 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4761                                     struct nfs_fsinfo *fsinfo)
4762 {
4763         __be32 *p;
4764         uint32_t i;
4765
4766         p = xdr_inline_decode(xdr, 4);
4767         if (unlikely(!p))
4768                 return -EIO;
4769         fsinfo->nlayouttypes = be32_to_cpup(p);
4770
4771         /* pNFS is not supported by the underlying file system */
4772         if (fsinfo->nlayouttypes == 0)
4773                 return 0;
4774
4775         /* Decode and set first layout type, move xdr->p past unused types */
4776         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4777         if (unlikely(!p))
4778                 return -EIO;
4779
4780         /* If we get too many, then just cap it at the max */
4781         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4782                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4783                         __func__, fsinfo->nlayouttypes);
4784                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4785         }
4786
4787         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4788                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4789         return 0;
4790 }
4791
4792 /*
4793  * The type of file system exported.
4794  * Note we must ensure that layouttype is set in any non-error case.
4795  */
4796 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4797                                 struct nfs_fsinfo *fsinfo)
4798 {
4799         int status = 0;
4800
4801         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4802         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4803                 return -EIO;
4804         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4805                 status = decode_pnfs_layout_types(xdr, fsinfo);
4806                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4807         }
4808         return status;
4809 }
4810
4811 /*
4812  * The prefered block size for layout directed io
4813  */
4814 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4815                                       uint32_t *res)
4816 {
4817         __be32 *p;
4818
4819         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4820         *res = 0;
4821         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4822                 p = xdr_inline_decode(xdr, 4);
4823                 if (unlikely(!p))
4824                         return -EIO;
4825                 *res = be32_to_cpup(p);
4826                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4827         }
4828         return 0;
4829 }
4830
4831 /*
4832  * The granularity of a CLONE operation.
4833  */
4834 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4835                                      uint32_t *res)
4836 {
4837         __be32 *p;
4838
4839         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4840         *res = 0;
4841         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4842                 p = xdr_inline_decode(xdr, 4);
4843                 if (unlikely(!p))
4844                         return -EIO;
4845                 *res = be32_to_cpup(p);
4846                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4847         }
4848         return 0;
4849 }
4850
4851 static int decode_attr_change_attr_type(struct xdr_stream *xdr,
4852                                         uint32_t *bitmap,
4853                                         enum nfs4_change_attr_type *res)
4854 {
4855         u32 tmp = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4856
4857         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4858         if (bitmap[2] & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
4859                 if (xdr_stream_decode_u32(xdr, &tmp))
4860                         return -EIO;
4861                 bitmap[2] &= ~FATTR4_WORD2_CHANGE_ATTR_TYPE;
4862         }
4863
4864         switch(tmp) {
4865         case NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR:
4866         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER:
4867         case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS:
4868         case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
4869                 *res = tmp;
4870                 break;
4871         default:
4872                 *res = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4873         }
4874         return 0;
4875 }
4876
4877 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4878 {
4879         unsigned int savep;
4880         uint32_t attrlen, bitmap[3];
4881         int status;
4882
4883         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4884                 goto xdr_error;
4885         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4886                 goto xdr_error;
4887         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4888                 goto xdr_error;
4889
4890         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4891
4892         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4893                 goto xdr_error;
4894         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4895                 goto xdr_error;
4896         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4897                 goto xdr_error;
4898         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4899         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4900                 goto xdr_error;
4901         fsinfo->wtpref = fsinfo->wtmax;
4902
4903         status = -EIO;
4904         if (unlikely(bitmap[0]))
4905                 goto xdr_error;
4906
4907         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4908         if (status != 0)
4909                 goto xdr_error;
4910         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4911         if (status != 0)
4912                 goto xdr_error;
4913
4914         status = -EIO;
4915         if (unlikely(bitmap[1]))
4916                 goto xdr_error;
4917
4918         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4919         if (status)
4920                 goto xdr_error;
4921         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4922         if (status)
4923                 goto xdr_error;
4924
4925         status = decode_attr_change_attr_type(xdr, bitmap,
4926                                               &fsinfo->change_attr_type);
4927         if (status)
4928                 goto xdr_error;
4929
4930         status = decode_attr_xattrsupport(xdr, bitmap,
4931                                           &fsinfo->xattr_support);
4932         if (status)
4933                 goto xdr_error;
4934
4935         status = verify_attr_len(xdr, savep, attrlen);
4936 xdr_error:
4937         dprintk("%s: xdr returned %d!\n", __func__, -status);
4938         return status;
4939 }
4940
4941 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4942 {
4943         __be32 *p;
4944         uint32_t len;
4945         int status;
4946
4947         /* Zero handle first to allow comparisons */
4948         memset(fh, 0, sizeof(*fh));
4949
4950         status = decode_op_hdr(xdr, OP_GETFH);
4951         if (status)
4952                 return status;
4953
4954         p = xdr_inline_decode(xdr, 4);
4955         if (unlikely(!p))
4956                 return -EIO;
4957         len = be32_to_cpup(p);
4958         if (len > NFS4_FHSIZE || len == 0) {
4959                 trace_nfs4_xdr_bad_filehandle(xdr, OP_GETFH, NFS4ERR_BADHANDLE);
4960                 return -EREMOTEIO;
4961         }
4962         fh->size = len;
4963         p = xdr_inline_decode(xdr, len);
4964         if (unlikely(!p))
4965                 return -EIO;
4966         memcpy(fh->data, p, len);
4967         return 0;
4968 }
4969
4970 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4971 {
4972         int status;
4973
4974         status = decode_op_hdr(xdr, OP_LINK);
4975         if (status)
4976                 return status;
4977         return decode_change_info(xdr, cinfo);
4978 }
4979
4980 /*
4981  * We create the owner, so we know a proper owner.id length is 4.
4982  */
4983 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4984 {
4985         uint64_t offset, length, clientid;
4986         __be32 *p;
4987         uint32_t namelen, type;
4988
4989         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4990         if (unlikely(!p))
4991                 return -EIO;
4992         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4993         p = xdr_decode_hyper(p, &length);
4994         type = be32_to_cpup(p++); /* 4 byte read */
4995         if (fl != NULL) { /* manipulate file lock */
4996                 fl->fl_start = (loff_t)offset;
4997                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4998                 if (length == ~(uint64_t)0)
4999                         fl->fl_end = OFFSET_MAX;
5000                 fl->fl_type = F_WRLCK;
5001                 if (type & 1)
5002                         fl->fl_type = F_RDLCK;
5003                 fl->fl_pid = 0;
5004         }
5005         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5006         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5007         p = xdr_inline_decode(xdr, namelen); /* variable size field */
5008         if (likely(!p))
5009                 return -EIO;
5010         return -NFS4ERR_DENIED;
5011 }
5012
5013 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5014 {
5015         int status;
5016
5017         status = decode_op_hdr(xdr, OP_LOCK);
5018         if (status == -EIO)
5019                 goto out;
5020         if (status == 0) {
5021                 status = decode_lock_stateid(xdr, &res->stateid);
5022                 if (unlikely(status))
5023                         goto out;
5024         } else if (status == -NFS4ERR_DENIED)
5025                 status = decode_lock_denied(xdr, NULL);
5026         if (res->open_seqid != NULL)
5027                 nfs_increment_open_seqid(status, res->open_seqid);
5028         nfs_increment_lock_seqid(status, res->lock_seqid);
5029 out:
5030         return status;
5031 }
5032
5033 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5034 {
5035         int status;
5036         status = decode_op_hdr(xdr, OP_LOCKT);
5037         if (status == -NFS4ERR_DENIED)
5038                 return decode_lock_denied(xdr, res->denied);
5039         return status;
5040 }
5041
5042 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5043 {
5044         int status;
5045
5046         status = decode_op_hdr(xdr, OP_LOCKU);
5047         if (status != -EIO)
5048                 nfs_increment_lock_seqid(status, res->seqid);
5049         if (status == 0)
5050                 status = decode_lock_stateid(xdr, &res->stateid);
5051         return status;
5052 }
5053
5054 static int decode_release_lockowner(struct xdr_stream *xdr)
5055 {
5056         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5057 }
5058
5059 static int decode_lookup(struct xdr_stream *xdr)
5060 {
5061         return decode_op_hdr(xdr, OP_LOOKUP);
5062 }
5063
5064 static int decode_lookupp(struct xdr_stream *xdr)
5065 {
5066         return decode_op_hdr(xdr, OP_LOOKUPP);
5067 }
5068
5069 /* This is too sick! */
5070 static int decode_space_limit(struct xdr_stream *xdr,
5071                 unsigned long *pagemod_limit)
5072 {
5073         __be32 *p;
5074         uint32_t limit_type, nblocks, blocksize;
5075         u64 maxsize = 0;
5076
5077         p = xdr_inline_decode(xdr, 12);
5078         if (unlikely(!p))
5079                 return -EIO;
5080         limit_type = be32_to_cpup(p++);
5081         switch (limit_type) {
5082         case NFS4_LIMIT_SIZE:
5083                 xdr_decode_hyper(p, &maxsize);
5084                 break;
5085         case NFS4_LIMIT_BLOCKS:
5086                 nblocks = be32_to_cpup(p++);
5087                 blocksize = be32_to_cpup(p);
5088                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5089         }
5090         maxsize >>= PAGE_SHIFT;
5091         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5092         return 0;
5093 }
5094
5095 static int decode_rw_delegation(struct xdr_stream *xdr,
5096                 uint32_t delegation_type,
5097                 struct nfs_openres *res)
5098 {
5099         __be32 *p;
5100         int status;
5101
5102         status = decode_delegation_stateid(xdr, &res->delegation);
5103         if (unlikely(status))
5104                 return status;
5105         p = xdr_inline_decode(xdr, 4);
5106         if (unlikely(!p))
5107                 return -EIO;
5108         res->do_recall = be32_to_cpup(p);
5109
5110         switch (delegation_type) {
5111         case NFS4_OPEN_DELEGATE_READ:
5112                 res->delegation_type = FMODE_READ;
5113                 break;
5114         case NFS4_OPEN_DELEGATE_WRITE:
5115                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5116                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5117                                 return -EIO;
5118         }
5119         return decode_ace(xdr, NULL);
5120 }
5121
5122 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5123 {
5124         __be32 *p;
5125         uint32_t why_no_delegation;
5126
5127         p = xdr_inline_decode(xdr, 4);
5128         if (unlikely(!p))
5129                 return -EIO;
5130         why_no_delegation = be32_to_cpup(p);
5131         switch (why_no_delegation) {
5132                 case WND4_CONTENTION:
5133                 case WND4_RESOURCE:
5134                         xdr_inline_decode(xdr, 4);
5135                         /* Ignore for now */
5136         }
5137         return 0;
5138 }
5139
5140 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5141 {
5142         __be32 *p;
5143         uint32_t delegation_type;
5144
5145         p = xdr_inline_decode(xdr, 4);
5146         if (unlikely(!p))
5147                 return -EIO;
5148         delegation_type = be32_to_cpup(p);
5149         res->delegation_type = 0;
5150         switch (delegation_type) {
5151         case NFS4_OPEN_DELEGATE_NONE:
5152                 return 0;
5153         case NFS4_OPEN_DELEGATE_READ:
5154         case NFS4_OPEN_DELEGATE_WRITE:
5155                 return decode_rw_delegation(xdr, delegation_type, res);
5156         case NFS4_OPEN_DELEGATE_NONE_EXT:
5157                 return decode_no_delegation(xdr, res);
5158         }
5159         return -EIO;
5160 }
5161
5162 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5163 {
5164         __be32 *p;
5165         uint32_t savewords, bmlen, i;
5166         int status;
5167
5168         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5169                 return status;
5170         nfs_increment_open_seqid(status, res->seqid);
5171         if (status)
5172                 return status;
5173         status = decode_open_stateid(xdr, &res->stateid);
5174         if (unlikely(status))
5175                 return status;
5176
5177         decode_change_info(xdr, &res->cinfo);
5178
5179         p = xdr_inline_decode(xdr, 8);
5180         if (unlikely(!p))
5181                 return -EIO;
5182         res->rflags = be32_to_cpup(p++);
5183         bmlen = be32_to_cpup(p);
5184         if (bmlen > 10)
5185                 goto xdr_error;
5186
5187         p = xdr_inline_decode(xdr, bmlen << 2);
5188         if (unlikely(!p))
5189                 return -EIO;
5190         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5191         for (i = 0; i < savewords; ++i)
5192                 res->attrset[i] = be32_to_cpup(p++);
5193         for (; i < NFS4_BITMAP_SIZE; i++)
5194                 res->attrset[i] = 0;
5195
5196         return decode_delegation(xdr, res);
5197 xdr_error:
5198         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5199         return -EIO;
5200 }
5201
5202 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5203 {
5204         int status;
5205
5206         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5207         if (status != -EIO)
5208                 nfs_increment_open_seqid(status, res->seqid);
5209         if (!status)
5210                 status = decode_open_stateid(xdr, &res->stateid);
5211         return status;
5212 }
5213
5214 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5215 {
5216         int status;
5217
5218         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5219         if (status != -EIO)
5220                 nfs_increment_open_seqid(status, res->seqid);
5221         if (!status)
5222                 status = decode_open_stateid(xdr, &res->stateid);
5223         return status;
5224 }
5225
5226 static int decode_putfh(struct xdr_stream *xdr)
5227 {
5228         return decode_op_hdr(xdr, OP_PUTFH);
5229 }
5230
5231 static int decode_putrootfh(struct xdr_stream *xdr)
5232 {
5233         return decode_op_hdr(xdr, OP_PUTROOTFH);
5234 }
5235
5236 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5237                        struct nfs_pgio_res *res)
5238 {
5239         __be32 *p;
5240         uint32_t count, eof, recvd;
5241         int status;
5242
5243         status = decode_op_hdr(xdr, OP_READ);
5244         if (status)
5245                 return status;
5246         p = xdr_inline_decode(xdr, 8);
5247         if (unlikely(!p))
5248                 return -EIO;
5249         eof = be32_to_cpup(p++);
5250         count = be32_to_cpup(p);
5251         recvd = xdr_read_pages(xdr, count);
5252         if (count > recvd) {
5253                 dprintk("NFS: server cheating in read reply: "
5254                                 "count %u > recvd %u\n", count, recvd);
5255                 count = recvd;
5256                 eof = 0;
5257         }
5258         res->eof = eof;
5259         res->count = count;
5260         return 0;
5261 }
5262
5263 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5264 {
5265         int             status;
5266         __be32          verf[2];
5267
5268         status = decode_op_hdr(xdr, OP_READDIR);
5269         if (!status)
5270                 status = decode_verifier(xdr, readdir->verifier.data);
5271         if (unlikely(status))
5272                 return status;
5273         memcpy(verf, readdir->verifier.data, sizeof(verf));
5274         dprintk("%s: verifier = %08x:%08x\n",
5275                         __func__, verf[0], verf[1]);
5276         return xdr_read_pages(xdr, xdr->buf->page_len);
5277 }
5278
5279 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5280 {
5281         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5282         u32 len, recvd;
5283         __be32 *p;
5284         int status;
5285
5286         status = decode_op_hdr(xdr, OP_READLINK);
5287         if (status)
5288                 return status;
5289
5290         /* Convert length of symlink */
5291         p = xdr_inline_decode(xdr, 4);
5292         if (unlikely(!p))
5293                 return -EIO;
5294         len = be32_to_cpup(p);
5295         if (len >= rcvbuf->page_len || len <= 0) {
5296                 dprintk("nfs: server returned giant symlink!\n");
5297                 return -ENAMETOOLONG;
5298         }
5299         recvd = xdr_read_pages(xdr, len);
5300         if (recvd < len) {
5301                 dprintk("NFS: server cheating in readlink reply: "
5302                                 "count %u > recvd %u\n", len, recvd);
5303                 return -EIO;
5304         }
5305         /*
5306          * The XDR encode routine has set things up so that
5307          * the link text will be copied directly into the
5308          * buffer.  We just have to do overflow-checking,
5309          * and null-terminate the text (the VFS expects
5310          * null-termination).
5311          */
5312         xdr_terminate_string(rcvbuf, len);
5313         return 0;
5314 }
5315
5316 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5317 {
5318         int status;
5319
5320         status = decode_op_hdr(xdr, OP_REMOVE);
5321         if (status)
5322                 goto out;
5323         status = decode_change_info(xdr, cinfo);
5324 out:
5325         return status;
5326 }
5327
5328 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5329               struct nfs4_change_info *new_cinfo)
5330 {
5331         int status;
5332
5333         status = decode_op_hdr(xdr, OP_RENAME);
5334         if (status)
5335                 goto out;
5336         if ((status = decode_change_info(xdr, old_cinfo)))
5337                 goto out;
5338         status = decode_change_info(xdr, new_cinfo);
5339 out:
5340         return status;
5341 }
5342
5343 static int decode_renew(struct xdr_stream *xdr)
5344 {
5345         return decode_op_hdr(xdr, OP_RENEW);
5346 }
5347
5348 static int
5349 decode_restorefh(struct xdr_stream *xdr)
5350 {
5351         return decode_op_hdr(xdr, OP_RESTOREFH);
5352 }
5353
5354 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5355                          struct nfs_getaclres *res)
5356 {
5357         unsigned int savep;
5358         uint32_t attrlen,
5359                  bitmap[3] = {0};
5360         int status;
5361
5362         res->acl_len = 0;
5363         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5364                 goto out;
5365
5366         xdr_enter_page(xdr, xdr->buf->page_len);
5367
5368         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5369                 goto out;
5370         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5371                 goto out;
5372
5373         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5374                 return -EIO;
5375         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5376
5377                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5378                  * are stored with the acl data to handle the problem of
5379                  * variable length bitmaps.*/
5380                 res->acl_data_offset = xdr_page_pos(xdr);
5381                 res->acl_len = attrlen;
5382
5383                 /* Check for receive buffer overflow */
5384                 if (res->acl_len > xdr_stream_remaining(xdr) ||
5385                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5386                         res->acl_flags |= NFS4_ACL_TRUNC;
5387                         dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5388                                 attrlen, xdr_stream_remaining(xdr));
5389                 }
5390         } else
5391                 status = -EOPNOTSUPP;
5392
5393 out:
5394         return status;
5395 }
5396
5397 static int
5398 decode_savefh(struct xdr_stream *xdr)
5399 {
5400         return decode_op_hdr(xdr, OP_SAVEFH);
5401 }
5402
5403 static int decode_setattr(struct xdr_stream *xdr)
5404 {
5405         int status;
5406
5407         status = decode_op_hdr(xdr, OP_SETATTR);
5408         if (status)
5409                 return status;
5410         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5411                 return 0;
5412         return -EIO;
5413 }
5414
5415 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5416 {
5417         __be32 *p;
5418         uint32_t opnum;
5419         int32_t nfserr;
5420
5421         p = xdr_inline_decode(xdr, 8);
5422         if (unlikely(!p))
5423                 return -EIO;
5424         opnum = be32_to_cpup(p++);
5425         if (opnum != OP_SETCLIENTID) {
5426                 dprintk("nfs: decode_setclientid: Server returned operation"
5427                         " %d\n", opnum);
5428                 return -EIO;
5429         }
5430         nfserr = be32_to_cpup(p);
5431         if (nfserr == NFS_OK) {
5432                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5433                 if (unlikely(!p))
5434                         return -EIO;
5435                 p = xdr_decode_hyper(p, &res->clientid);
5436                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5437         } else if (nfserr == NFSERR_CLID_INUSE) {
5438                 uint32_t len;
5439
5440                 /* skip netid string */
5441                 p = xdr_inline_decode(xdr, 4);
5442                 if (unlikely(!p))
5443                         return -EIO;
5444                 len = be32_to_cpup(p);
5445                 p = xdr_inline_decode(xdr, len);
5446                 if (unlikely(!p))
5447                         return -EIO;
5448
5449                 /* skip uaddr string */
5450                 p = xdr_inline_decode(xdr, 4);
5451                 if (unlikely(!p))
5452                         return -EIO;
5453                 len = be32_to_cpup(p);
5454                 p = xdr_inline_decode(xdr, len);
5455                 if (unlikely(!p))
5456                         return -EIO;
5457                 return -NFSERR_CLID_INUSE;
5458         } else
5459                 return nfs4_stat_to_errno(nfserr);
5460
5461         return 0;
5462 }
5463
5464 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5465 {
5466         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5467 }
5468
5469 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5470 {
5471         __be32 *p;
5472         int status;
5473
5474         status = decode_op_hdr(xdr, OP_WRITE);
5475         if (status)
5476                 return status;
5477
5478         p = xdr_inline_decode(xdr, 8);
5479         if (unlikely(!p))
5480                 return -EIO;
5481         res->count = be32_to_cpup(p++);
5482         res->verf->committed = be32_to_cpup(p++);
5483         return decode_write_verifier(xdr, &res->verf->verifier);
5484 }
5485
5486 static int decode_delegreturn(struct xdr_stream *xdr)
5487 {
5488         return decode_op_hdr(xdr, OP_DELEGRETURN);
5489 }
5490
5491 static int decode_secinfo_gss(struct xdr_stream *xdr,
5492                               struct nfs4_secinfo4 *flavor)
5493 {
5494         u32 oid_len;
5495         __be32 *p;
5496
5497         p = xdr_inline_decode(xdr, 4);
5498         if (unlikely(!p))
5499                 return -EIO;
5500         oid_len = be32_to_cpup(p);
5501         if (oid_len > GSS_OID_MAX_LEN)
5502                 return -EINVAL;
5503
5504         p = xdr_inline_decode(xdr, oid_len);
5505         if (unlikely(!p))
5506                 return -EIO;
5507         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5508         flavor->flavor_info.oid.len = oid_len;
5509
5510         p = xdr_inline_decode(xdr, 8);
5511         if (unlikely(!p))
5512                 return -EIO;
5513         flavor->flavor_info.qop = be32_to_cpup(p++);
5514         flavor->flavor_info.service = be32_to_cpup(p);
5515
5516         return 0;
5517 }
5518
5519 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5520 {
5521         struct nfs4_secinfo4 *sec_flavor;
5522         unsigned int i, num_flavors;
5523         int status;
5524         __be32 *p;
5525
5526         p = xdr_inline_decode(xdr, 4);
5527         if (unlikely(!p))
5528                 return -EIO;
5529
5530         res->flavors->num_flavors = 0;
5531         num_flavors = be32_to_cpup(p);
5532
5533         for (i = 0; i < num_flavors; i++) {
5534                 sec_flavor = &res->flavors->flavors[i];
5535                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5536                         break;
5537
5538                 p = xdr_inline_decode(xdr, 4);
5539                 if (unlikely(!p))
5540                         return -EIO;
5541                 sec_flavor->flavor = be32_to_cpup(p);
5542
5543                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5544                         status = decode_secinfo_gss(xdr, sec_flavor);
5545                         if (status)
5546                                 goto out;
5547                 }
5548                 res->flavors->num_flavors++;
5549         }
5550
5551         status = 0;
5552 out:
5553         return status;
5554 }
5555
5556 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5557 {
5558         int status = decode_op_hdr(xdr, OP_SECINFO);
5559         if (status)
5560                 return status;
5561         return decode_secinfo_common(xdr, res);
5562 }
5563
5564 #if defined(CONFIG_NFS_V4_1)
5565 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5566 {
5567         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5568         if (status)
5569                 return status;
5570         return decode_secinfo_common(xdr, res);
5571 }
5572
5573 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5574 {
5575         __be32 *p;
5576         uint32_t bitmap_words;
5577         unsigned int i;
5578
5579         p = xdr_inline_decode(xdr, 4);
5580         if (!p)
5581                 return -EIO;
5582         bitmap_words = be32_to_cpup(p++);
5583         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5584                 return -EIO;
5585         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5586         for (i = 0; i < bitmap_words; i++)
5587                 op_map->u.words[i] = be32_to_cpup(p++);
5588
5589         return 0;
5590 }
5591
5592 static int decode_exchange_id(struct xdr_stream *xdr,
5593                               struct nfs41_exchange_id_res *res)
5594 {
5595         __be32 *p;
5596         uint32_t dummy;
5597         char *dummy_str;
5598         int status;
5599         uint32_t impl_id_count;
5600
5601         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5602         if (status)
5603                 return status;
5604
5605         p = xdr_inline_decode(xdr, 8);
5606         if (unlikely(!p))
5607                 return -EIO;
5608         xdr_decode_hyper(p, &res->clientid);
5609         p = xdr_inline_decode(xdr, 12);
5610         if (unlikely(!p))
5611                 return -EIO;
5612         res->seqid = be32_to_cpup(p++);
5613         res->flags = be32_to_cpup(p++);
5614
5615         res->state_protect.how = be32_to_cpup(p);
5616         switch (res->state_protect.how) {
5617         case SP4_NONE:
5618                 break;
5619         case SP4_MACH_CRED:
5620                 status = decode_op_map(xdr, &res->state_protect.enforce);
5621                 if (status)
5622                         return status;
5623                 status = decode_op_map(xdr, &res->state_protect.allow);
5624                 if (status)
5625                         return status;
5626                 break;
5627         default:
5628                 WARN_ON_ONCE(1);
5629                 return -EIO;
5630         }
5631
5632         /* server_owner4.so_minor_id */
5633         p = xdr_inline_decode(xdr, 8);
5634         if (unlikely(!p))
5635                 return -EIO;
5636         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5637
5638         /* server_owner4.so_major_id */
5639         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5640         if (unlikely(status))
5641                 return status;
5642         memcpy(res->server_owner->major_id, dummy_str, dummy);
5643         res->server_owner->major_id_sz = dummy;
5644
5645         /* server_scope4 */
5646         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5647         if (unlikely(status))
5648                 return status;
5649         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5650         res->server_scope->server_scope_sz = dummy;
5651
5652         /* Implementation Id */
5653         p = xdr_inline_decode(xdr, 4);
5654         if (unlikely(!p))
5655                 return -EIO;
5656         impl_id_count = be32_to_cpup(p++);
5657
5658         if (impl_id_count) {
5659                 /* nii_domain */
5660                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5661                 if (unlikely(status))
5662                         return status;
5663                 memcpy(res->impl_id->domain, dummy_str, dummy);
5664
5665                 /* nii_name */
5666                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5667                 if (unlikely(status))
5668                         return status;
5669                 memcpy(res->impl_id->name, dummy_str, dummy);
5670
5671                 /* nii_date */
5672                 p = xdr_inline_decode(xdr, 12);
5673                 if (unlikely(!p))
5674                         return -EIO;
5675                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5676                 res->impl_id->date.nseconds = be32_to_cpup(p);
5677
5678                 /* if there's more than one entry, ignore the rest */
5679         }
5680         return 0;
5681 }
5682
5683 static int decode_chan_attrs(struct xdr_stream *xdr,
5684                              struct nfs4_channel_attrs *attrs)
5685 {
5686         __be32 *p;
5687         u32 nr_attrs, val;
5688
5689         p = xdr_inline_decode(xdr, 28);
5690         if (unlikely(!p))
5691                 return -EIO;
5692         val = be32_to_cpup(p++);        /* headerpadsz */
5693         if (val)
5694                 return -EINVAL;         /* no support for header padding yet */
5695         attrs->max_rqst_sz = be32_to_cpup(p++);
5696         attrs->max_resp_sz = be32_to_cpup(p++);
5697         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5698         attrs->max_ops = be32_to_cpup(p++);
5699         attrs->max_reqs = be32_to_cpup(p++);
5700         nr_attrs = be32_to_cpup(p);
5701         if (unlikely(nr_attrs > 1)) {
5702                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5703                         "count %u\n", __func__, nr_attrs);
5704                 return -EINVAL;
5705         }
5706         if (nr_attrs == 1) {
5707                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5708                 if (unlikely(!p))
5709                         return -EIO;
5710         }
5711         return 0;
5712 }
5713
5714 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5715 {
5716         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5717 }
5718
5719 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5720                                 struct nfs41_bind_conn_to_session_res *res)
5721 {
5722         __be32 *p;
5723         int status;
5724
5725         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5726         if (!status)
5727                 status = decode_sessionid(xdr, &res->sessionid);
5728         if (unlikely(status))
5729                 return status;
5730
5731         /* dir flags, rdma mode bool */
5732         p = xdr_inline_decode(xdr, 8);
5733         if (unlikely(!p))
5734                 return -EIO;
5735
5736         res->dir = be32_to_cpup(p++);
5737         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5738                 return -EIO;
5739         if (be32_to_cpup(p) == 0)
5740                 res->use_conn_in_rdma_mode = false;
5741         else
5742                 res->use_conn_in_rdma_mode = true;
5743
5744         return 0;
5745 }
5746
5747 static int decode_create_session(struct xdr_stream *xdr,
5748                                  struct nfs41_create_session_res *res)
5749 {
5750         __be32 *p;
5751         int status;
5752
5753         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5754         if (!status)
5755                 status = decode_sessionid(xdr, &res->sessionid);
5756         if (unlikely(status))
5757                 return status;
5758
5759         /* seqid, flags */
5760         p = xdr_inline_decode(xdr, 8);
5761         if (unlikely(!p))
5762                 return -EIO;
5763         res->seqid = be32_to_cpup(p++);
5764         res->flags = be32_to_cpup(p);
5765
5766         /* Channel attributes */
5767         status = decode_chan_attrs(xdr, &res->fc_attrs);
5768         if (!status)
5769                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5770         return status;
5771 }
5772
5773 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5774 {
5775         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5776 }
5777
5778 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5779 {
5780         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5781 }
5782
5783 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5784 {
5785         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5786 }
5787 #endif /* CONFIG_NFS_V4_1 */
5788
5789 static int decode_sequence(struct xdr_stream *xdr,
5790                            struct nfs4_sequence_res *res,
5791                            struct rpc_rqst *rqstp)
5792 {
5793 #if defined(CONFIG_NFS_V4_1)
5794         struct nfs4_session *session;
5795         struct nfs4_sessionid id;
5796         u32 dummy;
5797         int status;
5798         __be32 *p;
5799
5800         if (res->sr_slot == NULL)
5801                 return 0;
5802         if (!res->sr_slot->table->session)
5803                 return 0;
5804
5805         status = decode_op_hdr(xdr, OP_SEQUENCE);
5806         if (!status)
5807                 status = decode_sessionid(xdr, &id);
5808         if (unlikely(status))
5809                 goto out_err;
5810
5811         /*
5812          * If the server returns different values for sessionID, slotID or
5813          * sequence number, the server is looney tunes.
5814          */
5815         status = -EREMOTEIO;
5816         session = res->sr_slot->table->session;
5817
5818         if (memcmp(id.data, session->sess_id.data,
5819                    NFS4_MAX_SESSIONID_LEN)) {
5820                 dprintk("%s Invalid session id\n", __func__);
5821                 goto out_err;
5822         }
5823
5824         p = xdr_inline_decode(xdr, 20);
5825         if (unlikely(!p))
5826                 goto out_overflow;
5827
5828         /* seqid */
5829         dummy = be32_to_cpup(p++);
5830         if (dummy != res->sr_slot->seq_nr) {
5831                 dprintk("%s Invalid sequence number\n", __func__);
5832                 goto out_err;
5833         }
5834         /* slot id */
5835         dummy = be32_to_cpup(p++);
5836         if (dummy != res->sr_slot->slot_nr) {
5837                 dprintk("%s Invalid slot id\n", __func__);
5838                 goto out_err;
5839         }
5840         /* highest slot id */
5841         res->sr_highest_slotid = be32_to_cpup(p++);
5842         /* target highest slot id */
5843         res->sr_target_highest_slotid = be32_to_cpup(p++);
5844         /* result flags */
5845         res->sr_status_flags = be32_to_cpup(p);
5846         status = 0;
5847 out_err:
5848         res->sr_status = status;
5849         return status;
5850 out_overflow:
5851         status = -EIO;
5852         goto out_err;
5853 #else  /* CONFIG_NFS_V4_1 */
5854         return 0;
5855 #endif /* CONFIG_NFS_V4_1 */
5856 }
5857
5858 #if defined(CONFIG_NFS_V4_1)
5859 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5860 {
5861         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5862         return decode_stateid(xdr, stateid);
5863 }
5864
5865 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5866                                 struct nfs4_getdeviceinfo_res *res)
5867 {
5868         struct pnfs_device *pdev = res->pdev;
5869         __be32 *p;
5870         uint32_t len, type;
5871         int status;
5872
5873         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5874         if (status) {
5875                 if (status == -ETOOSMALL) {
5876                         p = xdr_inline_decode(xdr, 4);
5877                         if (unlikely(!p))
5878                                 return -EIO;
5879                         pdev->mincount = be32_to_cpup(p);
5880                         dprintk("%s: Min count too small. mincnt = %u\n",
5881                                 __func__, pdev->mincount);
5882                 }
5883                 return status;
5884         }
5885
5886         p = xdr_inline_decode(xdr, 8);
5887         if (unlikely(!p))
5888                 return -EIO;
5889         type = be32_to_cpup(p++);
5890         if (type != pdev->layout_type) {
5891                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5892                         __func__, pdev->layout_type, type);
5893                 return -EINVAL;
5894         }
5895         /*
5896          * Get the length of the opaque device_addr4. xdr_read_pages places
5897          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5898          * and places the remaining xdr data in xdr_buf->tail
5899          */
5900         pdev->mincount = be32_to_cpup(p);
5901         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5902                 return -EIO;
5903
5904         /* Parse notification bitmap, verifying that it is zero. */
5905         p = xdr_inline_decode(xdr, 4);
5906         if (unlikely(!p))
5907                 return -EIO;
5908         len = be32_to_cpup(p);
5909         if (len) {
5910                 uint32_t i;
5911
5912                 p = xdr_inline_decode(xdr, 4 * len);
5913                 if (unlikely(!p))
5914                         return -EIO;
5915
5916                 res->notification = be32_to_cpup(p++);
5917                 for (i = 1; i < len; i++) {
5918                         if (be32_to_cpup(p++)) {
5919                                 dprintk("%s: unsupported notification\n",
5920                                         __func__);
5921                                 return -EIO;
5922                         }
5923                 }
5924         }
5925         return 0;
5926 }
5927
5928 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5929                             struct nfs4_layoutget_res *res)
5930 {
5931         __be32 *p;
5932         int status;
5933         u32 layout_count;
5934         u32 recvd;
5935
5936         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5937         if (status)
5938                 goto out;
5939         p = xdr_inline_decode(xdr, 4);
5940         if (unlikely(!p))
5941                 goto out_overflow;
5942         res->return_on_close = be32_to_cpup(p);
5943         decode_layout_stateid(xdr, &res->stateid);
5944         p = xdr_inline_decode(xdr, 4);
5945         if (unlikely(!p))
5946                 goto out_overflow;
5947         layout_count = be32_to_cpup(p);
5948         if (!layout_count) {
5949                 dprintk("%s: server responded with empty layout array\n",
5950                         __func__);
5951                 status = -EINVAL;
5952                 goto out;
5953         }
5954
5955         p = xdr_inline_decode(xdr, 28);
5956         if (unlikely(!p))
5957                 goto out_overflow;
5958         p = xdr_decode_hyper(p, &res->range.offset);
5959         p = xdr_decode_hyper(p, &res->range.length);
5960         res->range.iomode = be32_to_cpup(p++);
5961         res->type = be32_to_cpup(p++);
5962         res->layoutp->len = be32_to_cpup(p);
5963
5964         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5965                 __func__,
5966                 (unsigned long)res->range.offset,
5967                 (unsigned long)res->range.length,
5968                 res->range.iomode,
5969                 res->type,
5970                 res->layoutp->len);
5971
5972         recvd = xdr_read_pages(xdr, res->layoutp->len);
5973         if (res->layoutp->len > recvd) {
5974                 dprintk("NFS: server cheating in layoutget reply: "
5975                                 "layout len %u > recvd %u\n",
5976                                 res->layoutp->len, recvd);
5977                 status = -EINVAL;
5978                 goto out;
5979         }
5980
5981         if (layout_count > 1) {
5982                 /* We only handle a length one array at the moment.  Any
5983                  * further entries are just ignored.  Note that this means
5984                  * the client may see a response that is less than the
5985                  * minimum it requested.
5986                  */
5987                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5988                         __func__, layout_count);
5989         }
5990
5991 out:
5992         res->status = status;
5993         return status;
5994 out_overflow:
5995         status = -EIO;
5996         goto out;
5997 }
5998
5999 static int decode_layoutreturn(struct xdr_stream *xdr,
6000                                struct nfs4_layoutreturn_res *res)
6001 {
6002         __be32 *p;
6003         int status;
6004
6005         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6006         if (status)
6007                 return status;
6008         p = xdr_inline_decode(xdr, 4);
6009         if (unlikely(!p))
6010                 return -EIO;
6011         res->lrs_present = be32_to_cpup(p);
6012         if (res->lrs_present)
6013                 status = decode_layout_stateid(xdr, &res->stateid);
6014         else
6015                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6016         return status;
6017 }
6018
6019 static int decode_layoutcommit(struct xdr_stream *xdr,
6020                                struct rpc_rqst *req,
6021                                struct nfs4_layoutcommit_res *res)
6022 {
6023         __be32 *p;
6024         __u32 sizechanged;
6025         int status;
6026
6027         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6028         res->status = status;
6029         if (status)
6030                 return status;
6031
6032         p = xdr_inline_decode(xdr, 4);
6033         if (unlikely(!p))
6034                 return -EIO;
6035         sizechanged = be32_to_cpup(p);
6036
6037         if (sizechanged) {
6038                 /* throw away new size */
6039                 p = xdr_inline_decode(xdr, 8);
6040                 if (unlikely(!p))
6041                         return -EIO;
6042         }
6043         return 0;
6044 }
6045
6046 static int decode_test_stateid(struct xdr_stream *xdr,
6047                                struct nfs41_test_stateid_res *res)
6048 {
6049         __be32 *p;
6050         int status;
6051         int num_res;
6052
6053         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6054         if (status)
6055                 return status;
6056
6057         p = xdr_inline_decode(xdr, 4);
6058         if (unlikely(!p))
6059                 return -EIO;
6060         num_res = be32_to_cpup(p++);
6061         if (num_res != 1)
6062                 return -EIO;
6063
6064         p = xdr_inline_decode(xdr, 4);
6065         if (unlikely(!p))
6066                 return -EIO;
6067         res->status = be32_to_cpup(p++);
6068
6069         return status;
6070 }
6071
6072 static int decode_free_stateid(struct xdr_stream *xdr,
6073                                struct nfs41_free_stateid_res *res)
6074 {
6075         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6076         return res->status;
6077 }
6078 #else
6079 static inline
6080 int decode_layoutreturn(struct xdr_stream *xdr,
6081                                struct nfs4_layoutreturn_res *res)
6082 {
6083         return 0;
6084 }
6085
6086 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6087                             struct nfs4_layoutget_res *res)
6088 {
6089         return 0;
6090 }
6091
6092 #endif /* CONFIG_NFS_V4_1 */
6093
6094 /*
6095  * END OF "GENERIC" DECODE ROUTINES.
6096  */
6097
6098 /*
6099  * Decode OPEN_DOWNGRADE response
6100  */
6101 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6102                                        struct xdr_stream *xdr,
6103                                        void *data)
6104 {
6105         struct nfs_closeres *res = data;
6106         struct compound_hdr hdr;
6107         int status;
6108
6109         status = decode_compound_hdr(xdr, &hdr);
6110         if (status)
6111                 goto out;
6112         status = decode_sequence(xdr, &res->seq_res, rqstp);
6113         if (status)
6114                 goto out;
6115         status = decode_putfh(xdr);
6116         if (status)
6117                 goto out;
6118         if (res->lr_res) {
6119                 status = decode_layoutreturn(xdr, res->lr_res);
6120                 res->lr_ret = status;
6121                 if (status)
6122                         goto out;
6123         }
6124         status = decode_open_downgrade(xdr, res);
6125 out:
6126         return status;
6127 }
6128
6129 /*
6130  * Decode ACCESS response
6131  */
6132 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6133                                void *data)
6134 {
6135         struct nfs4_accessres *res = data;
6136         struct compound_hdr hdr;
6137         int status;
6138
6139         status = decode_compound_hdr(xdr, &hdr);
6140         if (status)
6141                 goto out;
6142         status = decode_sequence(xdr, &res->seq_res, rqstp);
6143         if (status)
6144                 goto out;
6145         status = decode_putfh(xdr);
6146         if (status != 0)
6147                 goto out;
6148         status = decode_access(xdr, &res->supported, &res->access);
6149         if (status != 0)
6150                 goto out;
6151         if (res->fattr)
6152                 decode_getfattr(xdr, res->fattr, res->server);
6153 out:
6154         return status;
6155 }
6156
6157 /*
6158  * Decode LOOKUP response
6159  */
6160 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6161                                void *data)
6162 {
6163         struct nfs4_lookup_res *res = data;
6164         struct compound_hdr hdr;
6165         int status;
6166
6167         status = decode_compound_hdr(xdr, &hdr);
6168         if (status)
6169                 goto out;
6170         status = decode_sequence(xdr, &res->seq_res, rqstp);
6171         if (status)
6172                 goto out;
6173         status = decode_putfh(xdr);
6174         if (status)
6175                 goto out;
6176         status = decode_lookup(xdr);
6177         if (status)
6178                 goto out;
6179         status = decode_getfh(xdr, res->fh);
6180         if (status)
6181                 goto out;
6182         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6183 out:
6184         return status;
6185 }
6186
6187 /*
6188  * Decode LOOKUPP response
6189  */
6190 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6191                 void *data)
6192 {
6193         struct nfs4_lookupp_res *res = data;
6194         struct compound_hdr hdr;
6195         int status;
6196
6197         status = decode_compound_hdr(xdr, &hdr);
6198         if (status)
6199                 goto out;
6200         status = decode_sequence(xdr, &res->seq_res, rqstp);
6201         if (status)
6202                 goto out;
6203         status = decode_putfh(xdr);
6204         if (status)
6205                 goto out;
6206         status = decode_lookupp(xdr);
6207         if (status)
6208                 goto out;
6209         status = decode_getfh(xdr, res->fh);
6210         if (status)
6211                 goto out;
6212         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6213 out:
6214         return status;
6215 }
6216
6217 /*
6218  * Decode LOOKUP_ROOT response
6219  */
6220 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6221                                     struct xdr_stream *xdr,
6222                                     void *data)
6223 {
6224         struct nfs4_lookup_res *res = data;
6225         struct compound_hdr hdr;
6226         int status;
6227
6228         status = decode_compound_hdr(xdr, &hdr);
6229         if (status)
6230                 goto out;
6231         status = decode_sequence(xdr, &res->seq_res, rqstp);
6232         if (status)
6233                 goto out;
6234         status = decode_putrootfh(xdr);
6235         if (status)
6236                 goto out;
6237         status = decode_getfh(xdr, res->fh);
6238         if (status == 0)
6239                 status = decode_getfattr_label(xdr, res->fattr,
6240                                                 res->label, res->server);
6241 out:
6242         return status;
6243 }
6244
6245 /*
6246  * Decode REMOVE response
6247  */
6248 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6249                                void *data)
6250 {
6251         struct nfs_removeres *res = data;
6252         struct compound_hdr hdr;
6253         int status;
6254
6255         status = decode_compound_hdr(xdr, &hdr);
6256         if (status)
6257                 goto out;
6258         status = decode_sequence(xdr, &res->seq_res, rqstp);
6259         if (status)
6260                 goto out;
6261         status = decode_putfh(xdr);
6262         if (status)
6263                 goto out;
6264         status = decode_remove(xdr, &res->cinfo);
6265 out:
6266         return status;
6267 }
6268
6269 /*
6270  * Decode RENAME response
6271  */
6272 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6273                                void *data)
6274 {
6275         struct nfs_renameres *res = data;
6276         struct compound_hdr hdr;
6277         int status;
6278
6279         status = decode_compound_hdr(xdr, &hdr);
6280         if (status)
6281                 goto out;
6282         status = decode_sequence(xdr, &res->seq_res, rqstp);
6283         if (status)
6284                 goto out;
6285         status = decode_putfh(xdr);
6286         if (status)
6287                 goto out;
6288         status = decode_savefh(xdr);
6289         if (status)
6290                 goto out;
6291         status = decode_putfh(xdr);
6292         if (status)
6293                 goto out;
6294         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6295 out:
6296         return status;
6297 }
6298
6299 /*
6300  * Decode LINK response
6301  */
6302 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6303                              void *data)
6304 {
6305         struct nfs4_link_res *res = data;
6306         struct compound_hdr hdr;
6307         int status;
6308
6309         status = decode_compound_hdr(xdr, &hdr);
6310         if (status)
6311                 goto out;
6312         status = decode_sequence(xdr, &res->seq_res, rqstp);
6313         if (status)
6314                 goto out;
6315         status = decode_putfh(xdr);
6316         if (status)
6317                 goto out;
6318         status = decode_savefh(xdr);
6319         if (status)
6320                 goto out;
6321         status = decode_putfh(xdr);
6322         if (status)
6323                 goto out;
6324         status = decode_link(xdr, &res->cinfo);
6325         if (status)
6326                 goto out;
6327         /*
6328          * Note order: OP_LINK leaves the directory as the current
6329          *             filehandle.
6330          */
6331         status = decode_restorefh(xdr);
6332         if (status)
6333                 goto out;
6334         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6335 out:
6336         return status;
6337 }
6338
6339 /*
6340  * Decode CREATE response
6341  */
6342 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6343                                void *data)
6344 {
6345         struct nfs4_create_res *res = data;
6346         struct compound_hdr hdr;
6347         int status;
6348
6349         status = decode_compound_hdr(xdr, &hdr);
6350         if (status)
6351                 goto out;
6352         status = decode_sequence(xdr, &res->seq_res, rqstp);
6353         if (status)
6354                 goto out;
6355         status = decode_putfh(xdr);
6356         if (status)
6357                 goto out;
6358         status = decode_create(xdr, &res->dir_cinfo);
6359         if (status)
6360                 goto out;
6361         status = decode_getfh(xdr, res->fh);
6362         if (status)
6363                 goto out;
6364         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6365 out:
6366         return status;
6367 }
6368
6369 /*
6370  * Decode SYMLINK response
6371  */
6372 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6373                                 void *res)
6374 {
6375         return nfs4_xdr_dec_create(rqstp, xdr, res);
6376 }
6377
6378 /*
6379  * Decode GETATTR response
6380  */
6381 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6382                                 void *data)
6383 {
6384         struct nfs4_getattr_res *res = data;
6385         struct compound_hdr hdr;
6386         int status;
6387
6388         status = decode_compound_hdr(xdr, &hdr);
6389         if (status)
6390                 goto out;
6391         status = decode_sequence(xdr, &res->seq_res, rqstp);
6392         if (status)
6393                 goto out;
6394         status = decode_putfh(xdr);
6395         if (status)
6396                 goto out;
6397         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6398 out:
6399         return status;
6400 }
6401
6402 /*
6403  * Encode an SETACL request
6404  */
6405 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6406                                 const void *data)
6407 {
6408         const struct nfs_setaclargs *args = data;
6409         struct compound_hdr hdr = {
6410                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6411         };
6412
6413         encode_compound_hdr(xdr, req, &hdr);
6414         encode_sequence(xdr, &args->seq_args, &hdr);
6415         encode_putfh(xdr, args->fh, &hdr);
6416         encode_setacl(xdr, args, &hdr);
6417         encode_nops(&hdr);
6418 }
6419
6420 /*
6421  * Decode SETACL response
6422  */
6423 static int
6424 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6425                     void *data)
6426 {
6427         struct nfs_setaclres *res = data;
6428         struct compound_hdr hdr;
6429         int status;
6430
6431         status = decode_compound_hdr(xdr, &hdr);
6432         if (status)
6433                 goto out;
6434         status = decode_sequence(xdr, &res->seq_res, rqstp);
6435         if (status)
6436                 goto out;
6437         status = decode_putfh(xdr);
6438         if (status)
6439                 goto out;
6440         status = decode_setattr(xdr);
6441 out:
6442         return status;
6443 }
6444
6445 /*
6446  * Decode GETACL response
6447  */
6448 static int
6449 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6450                     void *data)
6451 {
6452         struct nfs_getaclres *res = data;
6453         struct compound_hdr hdr;
6454         int status;
6455
6456         if (res->acl_scratch != NULL)
6457                 xdr_set_scratch_page(xdr, res->acl_scratch);
6458         status = decode_compound_hdr(xdr, &hdr);
6459         if (status)
6460                 goto out;
6461         status = decode_sequence(xdr, &res->seq_res, rqstp);
6462         if (status)
6463                 goto out;
6464         status = decode_putfh(xdr);
6465         if (status)
6466                 goto out;
6467         status = decode_getacl(xdr, rqstp, res);
6468
6469 out:
6470         return status;
6471 }
6472
6473 /*
6474  * Decode CLOSE response
6475  */
6476 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6477                               void *data)
6478 {
6479         struct nfs_closeres *res = data;
6480         struct compound_hdr hdr;
6481         int status;
6482
6483         status = decode_compound_hdr(xdr, &hdr);
6484         if (status)
6485                 goto out;
6486         status = decode_sequence(xdr, &res->seq_res, rqstp);
6487         if (status)
6488                 goto out;
6489         status = decode_putfh(xdr);
6490         if (status)
6491                 goto out;
6492         if (res->lr_res) {
6493                 status = decode_layoutreturn(xdr, res->lr_res);
6494                 res->lr_ret = status;
6495                 if (status)
6496                         goto out;
6497         }
6498         if (res->fattr != NULL) {
6499                 status = decode_getfattr(xdr, res->fattr, res->server);
6500                 if (status != 0)
6501                         goto out;
6502         }
6503         status = decode_close(xdr, res);
6504 out:
6505         return status;
6506 }
6507
6508 /*
6509  * Decode OPEN response
6510  */
6511 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6512                              void *data)
6513 {
6514         struct nfs_openres *res = data;
6515         struct compound_hdr hdr;
6516         int status;
6517
6518         status = decode_compound_hdr(xdr, &hdr);
6519         if (status)
6520                 goto out;
6521         status = decode_sequence(xdr, &res->seq_res, rqstp);
6522         if (status)
6523                 goto out;
6524         status = decode_putfh(xdr);
6525         if (status)
6526                 goto out;
6527         status = decode_open(xdr, res);
6528         if (status)
6529                 goto out;
6530         status = decode_getfh(xdr, &res->fh);
6531         if (status)
6532                 goto out;
6533         if (res->access_request)
6534                 decode_access(xdr, &res->access_supported, &res->access_result);
6535         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6536         if (res->lg_res)
6537                 decode_layoutget(xdr, rqstp, res->lg_res);
6538 out:
6539         return status;
6540 }
6541
6542 /*
6543  * Decode OPEN_CONFIRM response
6544  */
6545 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6546                                      struct xdr_stream *xdr,
6547                                      void *data)
6548 {
6549         struct nfs_open_confirmres *res = data;
6550         struct compound_hdr hdr;
6551         int status;
6552
6553         status = decode_compound_hdr(xdr, &hdr);
6554         if (status)
6555                 goto out;
6556         status = decode_putfh(xdr);
6557         if (status)
6558                 goto out;
6559         status = decode_open_confirm(xdr, res);
6560 out:
6561         return status;
6562 }
6563
6564 /*
6565  * Decode OPEN response
6566  */
6567 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6568                                     struct xdr_stream *xdr,
6569                                     void *data)
6570 {
6571         struct nfs_openres *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_sequence(xdr, &res->seq_res, rqstp);
6579         if (status)
6580                 goto out;
6581         status = decode_putfh(xdr);
6582         if (status)
6583                 goto out;
6584         status = decode_open(xdr, res);
6585         if (status)
6586                 goto out;
6587         if (res->access_request)
6588                 decode_access(xdr, &res->access_supported, &res->access_result);
6589         decode_getfattr(xdr, res->f_attr, res->server);
6590         if (res->lg_res)
6591                 decode_layoutget(xdr, rqstp, res->lg_res);
6592 out:
6593         return status;
6594 }
6595
6596 /*
6597  * Decode SETATTR response
6598  */
6599 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6600                                 struct xdr_stream *xdr,
6601                                 void *data)
6602 {
6603         struct nfs_setattrres *res = data;
6604         struct compound_hdr hdr;
6605         int status;
6606
6607         status = decode_compound_hdr(xdr, &hdr);
6608         if (status)
6609                 goto out;
6610         status = decode_sequence(xdr, &res->seq_res, rqstp);
6611         if (status)
6612                 goto out;
6613         status = decode_putfh(xdr);
6614         if (status)
6615                 goto out;
6616         status = decode_setattr(xdr);
6617         if (status)
6618                 goto out;
6619         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6620 out:
6621         return status;
6622 }
6623
6624 /*
6625  * Decode LOCK response
6626  */
6627 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6628                              void *data)
6629 {
6630         struct nfs_lock_res *res = data;
6631         struct compound_hdr hdr;
6632         int status;
6633
6634         status = decode_compound_hdr(xdr, &hdr);
6635         if (status)
6636                 goto out;
6637         status = decode_sequence(xdr, &res->seq_res, rqstp);
6638         if (status)
6639                 goto out;
6640         status = decode_putfh(xdr);
6641         if (status)
6642                 goto out;
6643         status = decode_lock(xdr, res);
6644 out:
6645         return status;
6646 }
6647
6648 /*
6649  * Decode LOCKT response
6650  */
6651 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6652                               void *data)
6653 {
6654         struct nfs_lockt_res *res = data;
6655         struct compound_hdr hdr;
6656         int status;
6657
6658         status = decode_compound_hdr(xdr, &hdr);
6659         if (status)
6660                 goto out;
6661         status = decode_sequence(xdr, &res->seq_res, rqstp);
6662         if (status)
6663                 goto out;
6664         status = decode_putfh(xdr);
6665         if (status)
6666                 goto out;
6667         status = decode_lockt(xdr, res);
6668 out:
6669         return status;
6670 }
6671
6672 /*
6673  * Decode LOCKU response
6674  */
6675 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6676                               void *data)
6677 {
6678         struct nfs_locku_res *res = data;
6679         struct compound_hdr hdr;
6680         int status;
6681
6682         status = decode_compound_hdr(xdr, &hdr);
6683         if (status)
6684                 goto out;
6685         status = decode_sequence(xdr, &res->seq_res, rqstp);
6686         if (status)
6687                 goto out;
6688         status = decode_putfh(xdr);
6689         if (status)
6690                 goto out;
6691         status = decode_locku(xdr, res);
6692 out:
6693         return status;
6694 }
6695
6696 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6697                                           struct xdr_stream *xdr, void *dummy)
6698 {
6699         struct compound_hdr hdr;
6700         int status;
6701
6702         status = decode_compound_hdr(xdr, &hdr);
6703         if (!status)
6704                 status = decode_release_lockowner(xdr);
6705         return status;
6706 }
6707
6708 /*
6709  * Decode READLINK response
6710  */
6711 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6712                                  struct xdr_stream *xdr,
6713                                  void *data)
6714 {
6715         struct nfs4_readlink_res *res = data;
6716         struct compound_hdr hdr;
6717         int status;
6718
6719         status = decode_compound_hdr(xdr, &hdr);
6720         if (status)
6721                 goto out;
6722         status = decode_sequence(xdr, &res->seq_res, rqstp);
6723         if (status)
6724                 goto out;
6725         status = decode_putfh(xdr);
6726         if (status)
6727                 goto out;
6728         status = decode_readlink(xdr, rqstp);
6729 out:
6730         return status;
6731 }
6732
6733 /*
6734  * Decode READDIR response
6735  */
6736 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6737                                 void *data)
6738 {
6739         struct nfs4_readdir_res *res = data;
6740         struct compound_hdr hdr;
6741         int status;
6742
6743         status = decode_compound_hdr(xdr, &hdr);
6744         if (status)
6745                 goto out;
6746         status = decode_sequence(xdr, &res->seq_res, rqstp);
6747         if (status)
6748                 goto out;
6749         status = decode_putfh(xdr);
6750         if (status)
6751                 goto out;
6752         status = decode_readdir(xdr, rqstp, res);
6753 out:
6754         return status;
6755 }
6756
6757 /*
6758  * Decode Read response
6759  */
6760 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6761                              void *data)
6762 {
6763         struct nfs_pgio_res *res = data;
6764         struct compound_hdr hdr;
6765         int status;
6766
6767         status = decode_compound_hdr(xdr, &hdr);
6768         res->op_status = hdr.status;
6769         if (status)
6770                 goto out;
6771         status = decode_sequence(xdr, &res->seq_res, rqstp);
6772         if (status)
6773                 goto out;
6774         status = decode_putfh(xdr);
6775         if (status)
6776                 goto out;
6777         status = decode_read(xdr, rqstp, res);
6778         if (!status)
6779                 status = res->count;
6780 out:
6781         return status;
6782 }
6783
6784 /*
6785  * Decode WRITE response
6786  */
6787 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6788                               void *data)
6789 {
6790         struct nfs_pgio_res *res = data;
6791         struct compound_hdr hdr;
6792         int status;
6793
6794         status = decode_compound_hdr(xdr, &hdr);
6795         res->op_status = hdr.status;
6796         if (status)
6797                 goto out;
6798         status = decode_sequence(xdr, &res->seq_res, rqstp);
6799         if (status)
6800                 goto out;
6801         status = decode_putfh(xdr);
6802         if (status)
6803                 goto out;
6804         status = decode_write(xdr, res);
6805         if (status)
6806                 goto out;
6807         if (res->fattr)
6808                 decode_getfattr(xdr, res->fattr, res->server);
6809         if (!status)
6810                 status = res->count;
6811 out:
6812         return status;
6813 }
6814
6815 /*
6816  * Decode COMMIT response
6817  */
6818 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6819                                void *data)
6820 {
6821         struct nfs_commitres *res = data;
6822         struct compound_hdr hdr;
6823         int status;
6824
6825         status = decode_compound_hdr(xdr, &hdr);
6826         res->op_status = hdr.status;
6827         if (status)
6828                 goto out;
6829         status = decode_sequence(xdr, &res->seq_res, rqstp);
6830         if (status)
6831                 goto out;
6832         status = decode_putfh(xdr);
6833         if (status)
6834                 goto out;
6835         status = decode_commit(xdr, res);
6836 out:
6837         return status;
6838 }
6839
6840 /*
6841  * Decode FSINFO response
6842  */
6843 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6844                                void *data)
6845 {
6846         struct nfs4_fsinfo_res *res = data;
6847         struct compound_hdr hdr;
6848         int status;
6849
6850         status = decode_compound_hdr(xdr, &hdr);
6851         if (!status)
6852                 status = decode_sequence(xdr, &res->seq_res, req);
6853         if (!status)
6854                 status = decode_putfh(xdr);
6855         if (!status)
6856                 status = decode_fsinfo(xdr, res->fsinfo);
6857         return status;
6858 }
6859
6860 /*
6861  * Decode PATHCONF response
6862  */
6863 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6864                                  void *data)
6865 {
6866         struct nfs4_pathconf_res *res = data;
6867         struct compound_hdr hdr;
6868         int status;
6869
6870         status = decode_compound_hdr(xdr, &hdr);
6871         if (!status)
6872                 status = decode_sequence(xdr, &res->seq_res, req);
6873         if (!status)
6874                 status = decode_putfh(xdr);
6875         if (!status)
6876                 status = decode_pathconf(xdr, res->pathconf);
6877         return status;
6878 }
6879
6880 /*
6881  * Decode STATFS response
6882  */
6883 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6884                                void *data)
6885 {
6886         struct nfs4_statfs_res *res = data;
6887         struct compound_hdr hdr;
6888         int status;
6889
6890         status = decode_compound_hdr(xdr, &hdr);
6891         if (!status)
6892                 status = decode_sequence(xdr, &res->seq_res, req);
6893         if (!status)
6894                 status = decode_putfh(xdr);
6895         if (!status)
6896                 status = decode_statfs(xdr, res->fsstat);
6897         return status;
6898 }
6899
6900 /*
6901  * Decode GETATTR_BITMAP response
6902  */
6903 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6904                                     struct xdr_stream *xdr,
6905                                     void *data)
6906 {
6907         struct nfs4_server_caps_res *res = data;
6908         struct compound_hdr hdr;
6909         int status;
6910
6911         status = decode_compound_hdr(xdr, &hdr);
6912         if (status)
6913                 goto out;
6914         status = decode_sequence(xdr, &res->seq_res, req);
6915         if (status)
6916                 goto out;
6917         status = decode_putfh(xdr);
6918         if (status)
6919                 goto out;
6920         status = decode_server_caps(xdr, res);
6921 out:
6922         return status;
6923 }
6924
6925 /*
6926  * Decode RENEW response
6927  */
6928 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6929                               void *__unused)
6930 {
6931         struct compound_hdr hdr;
6932         int status;
6933
6934         status = decode_compound_hdr(xdr, &hdr);
6935         if (!status)
6936                 status = decode_renew(xdr);
6937         return status;
6938 }
6939
6940 /*
6941  * Decode SETCLIENTID response
6942  */
6943 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6944                                     struct xdr_stream *xdr,
6945                                     void *data)
6946 {
6947         struct nfs4_setclientid_res *res = data;
6948         struct compound_hdr hdr;
6949         int status;
6950
6951         status = decode_compound_hdr(xdr, &hdr);
6952         if (!status)
6953                 status = decode_setclientid(xdr, res);
6954         return status;
6955 }
6956
6957 /*
6958  * Decode SETCLIENTID_CONFIRM response
6959  */
6960 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6961                                             struct xdr_stream *xdr,
6962                                             void *data)
6963 {
6964         struct compound_hdr hdr;
6965         int status;
6966
6967         status = decode_compound_hdr(xdr, &hdr);
6968         if (!status)
6969                 status = decode_setclientid_confirm(xdr);
6970         return status;
6971 }
6972
6973 /*
6974  * Decode DELEGRETURN response
6975  */
6976 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6977                                     struct xdr_stream *xdr,
6978                                     void *data)
6979 {
6980         struct nfs4_delegreturnres *res = data;
6981         struct compound_hdr hdr;
6982         int status;
6983
6984         status = decode_compound_hdr(xdr, &hdr);
6985         if (status)
6986                 goto out;
6987         status = decode_sequence(xdr, &res->seq_res, rqstp);
6988         if (status)
6989                 goto out;
6990         status = decode_putfh(xdr);
6991         if (status != 0)
6992                 goto out;
6993         if (res->lr_res) {
6994                 status = decode_layoutreturn(xdr, res->lr_res);
6995                 res->lr_ret = status;
6996                 if (status)
6997                         goto out;
6998         }
6999         if (res->fattr) {
7000                 status = decode_getfattr(xdr, res->fattr, res->server);
7001                 if (status != 0)
7002                         goto out;
7003         }
7004         status = decode_delegreturn(xdr);
7005 out:
7006         return status;
7007 }
7008
7009 /*
7010  * Decode FS_LOCATIONS response
7011  */
7012 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7013                                      struct xdr_stream *xdr,
7014                                      void *data)
7015 {
7016         struct nfs4_fs_locations_res *res = data;
7017         struct compound_hdr hdr;
7018         int status;
7019
7020         status = decode_compound_hdr(xdr, &hdr);
7021         if (status)
7022                 goto out;
7023         status = decode_sequence(xdr, &res->seq_res, req);
7024         if (status)
7025                 goto out;
7026         status = decode_putfh(xdr);
7027         if (status)
7028                 goto out;
7029         if (res->migration) {
7030                 xdr_enter_page(xdr, PAGE_SIZE);
7031                 status = decode_getfattr_generic(xdr,
7032                                         &res->fs_locations->fattr,
7033                                          NULL, res->fs_locations,
7034                                          NULL, res->fs_locations->server);
7035                 if (status)
7036                         goto out;
7037                 if (res->renew)
7038                         status = decode_renew(xdr);
7039         } else {
7040                 status = decode_lookup(xdr);
7041                 if (status)
7042                         goto out;
7043                 xdr_enter_page(xdr, PAGE_SIZE);
7044                 status = decode_getfattr_generic(xdr,
7045                                         &res->fs_locations->fattr,
7046                                          NULL, res->fs_locations,
7047                                          NULL, res->fs_locations->server);
7048         }
7049 out:
7050         return status;
7051 }
7052
7053 /*
7054  * Decode SECINFO response
7055  */
7056 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7057                                 struct xdr_stream *xdr,
7058                                 void *data)
7059 {
7060         struct nfs4_secinfo_res *res = data;
7061         struct compound_hdr hdr;
7062         int status;
7063
7064         status = decode_compound_hdr(xdr, &hdr);
7065         if (status)
7066                 goto out;
7067         status = decode_sequence(xdr, &res->seq_res, rqstp);
7068         if (status)
7069                 goto out;
7070         status = decode_putfh(xdr);
7071         if (status)
7072                 goto out;
7073         status = decode_secinfo(xdr, res);
7074 out:
7075         return status;
7076 }
7077
7078 /*
7079  * Decode FSID_PRESENT response
7080  */
7081 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7082                                      struct xdr_stream *xdr,
7083                                      void *data)
7084 {
7085         struct nfs4_fsid_present_res *res = data;
7086         struct compound_hdr hdr;
7087         int status;
7088
7089         status = decode_compound_hdr(xdr, &hdr);
7090         if (status)
7091                 goto out;
7092         status = decode_sequence(xdr, &res->seq_res, rqstp);
7093         if (status)
7094                 goto out;
7095         status = decode_putfh(xdr);
7096         if (status)
7097                 goto out;
7098         status = decode_getfh(xdr, res->fh);
7099         if (status)
7100                 goto out;
7101         if (res->renew)
7102                 status = decode_renew(xdr);
7103 out:
7104         return status;
7105 }
7106
7107 #if defined(CONFIG_NFS_V4_1)
7108 /*
7109  * Decode BIND_CONN_TO_SESSION response
7110  */
7111 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7112                                         struct xdr_stream *xdr,
7113                                         void *res)
7114 {
7115         struct compound_hdr hdr;
7116         int status;
7117
7118         status = decode_compound_hdr(xdr, &hdr);
7119         if (!status)
7120                 status = decode_bind_conn_to_session(xdr, res);
7121         return status;
7122 }
7123
7124 /*
7125  * Decode EXCHANGE_ID response
7126  */
7127 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7128                                     struct xdr_stream *xdr,
7129                                     void *res)
7130 {
7131         struct compound_hdr hdr;
7132         int status;
7133
7134         status = decode_compound_hdr(xdr, &hdr);
7135         if (!status)
7136                 status = decode_exchange_id(xdr, res);
7137         return status;
7138 }
7139
7140 /*
7141  * Decode CREATE_SESSION response
7142  */
7143 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7144                                        struct xdr_stream *xdr,
7145                                        void *res)
7146 {
7147         struct compound_hdr hdr;
7148         int status;
7149
7150         status = decode_compound_hdr(xdr, &hdr);
7151         if (!status)
7152                 status = decode_create_session(xdr, res);
7153         return status;
7154 }
7155
7156 /*
7157  * Decode DESTROY_SESSION response
7158  */
7159 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7160                                         struct xdr_stream *xdr,
7161                                         void *res)
7162 {
7163         struct compound_hdr hdr;
7164         int status;
7165
7166         status = decode_compound_hdr(xdr, &hdr);
7167         if (!status)
7168                 status = decode_destroy_session(xdr, res);
7169         return status;
7170 }
7171
7172 /*
7173  * Decode DESTROY_CLIENTID response
7174  */
7175 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7176                                         struct xdr_stream *xdr,
7177                                         void *res)
7178 {
7179         struct compound_hdr hdr;
7180         int status;
7181
7182         status = decode_compound_hdr(xdr, &hdr);
7183         if (!status)
7184                 status = decode_destroy_clientid(xdr, res);
7185         return status;
7186 }
7187
7188 /*
7189  * Decode SEQUENCE response
7190  */
7191 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7192                                  struct xdr_stream *xdr,
7193                                  void *res)
7194 {
7195         struct compound_hdr hdr;
7196         int status;
7197
7198         status = decode_compound_hdr(xdr, &hdr);
7199         if (!status)
7200                 status = decode_sequence(xdr, res, rqstp);
7201         return status;
7202 }
7203
7204 #endif
7205
7206 /*
7207  * Decode GET_LEASE_TIME response
7208  */
7209 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7210                                        struct xdr_stream *xdr,
7211                                        void *data)
7212 {
7213         struct nfs4_get_lease_time_res *res = data;
7214         struct compound_hdr hdr;
7215         int status;
7216
7217         status = decode_compound_hdr(xdr, &hdr);
7218         if (!status)
7219                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7220         if (!status)
7221                 status = decode_putrootfh(xdr);
7222         if (!status)
7223                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7224         return status;
7225 }
7226
7227 #ifdef CONFIG_NFS_V4_1
7228
7229 /*
7230  * Decode RECLAIM_COMPLETE response
7231  */
7232 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7233                                          struct xdr_stream *xdr,
7234                                          void *data)
7235 {
7236         struct nfs41_reclaim_complete_res *res = data;
7237         struct compound_hdr hdr;
7238         int status;
7239
7240         status = decode_compound_hdr(xdr, &hdr);
7241         if (!status)
7242                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7243         if (!status)
7244                 status = decode_reclaim_complete(xdr, NULL);
7245         return status;
7246 }
7247
7248 /*
7249  * Decode GETDEVINFO response
7250  */
7251 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7252                                       struct xdr_stream *xdr,
7253                                       void *data)
7254 {
7255         struct nfs4_getdeviceinfo_res *res = data;
7256         struct compound_hdr hdr;
7257         int status;
7258
7259         status = decode_compound_hdr(xdr, &hdr);
7260         if (status != 0)
7261                 goto out;
7262         status = decode_sequence(xdr, &res->seq_res, rqstp);
7263         if (status != 0)
7264                 goto out;
7265         status = decode_getdeviceinfo(xdr, res);
7266 out:
7267         return status;
7268 }
7269
7270 /*
7271  * Decode LAYOUTGET response
7272  */
7273 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7274                                   struct xdr_stream *xdr,
7275                                   void *data)
7276 {
7277         struct nfs4_layoutget_res *res = data;
7278         struct compound_hdr hdr;
7279         int status;
7280
7281         status = decode_compound_hdr(xdr, &hdr);
7282         if (status)
7283                 goto out;
7284         status = decode_sequence(xdr, &res->seq_res, rqstp);
7285         if (status)
7286                 goto out;
7287         status = decode_putfh(xdr);
7288         if (status)
7289                 goto out;
7290         status = decode_layoutget(xdr, rqstp, res);
7291 out:
7292         return status;
7293 }
7294
7295 /*
7296  * Decode LAYOUTRETURN response
7297  */
7298 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7299                                      struct xdr_stream *xdr,
7300                                      void *data)
7301 {
7302         struct nfs4_layoutreturn_res *res = data;
7303         struct compound_hdr hdr;
7304         int status;
7305
7306         status = decode_compound_hdr(xdr, &hdr);
7307         if (status)
7308                 goto out;
7309         status = decode_sequence(xdr, &res->seq_res, rqstp);
7310         if (status)
7311                 goto out;
7312         status = decode_putfh(xdr);
7313         if (status)
7314                 goto out;
7315         status = decode_layoutreturn(xdr, res);
7316 out:
7317         return status;
7318 }
7319
7320 /*
7321  * Decode LAYOUTCOMMIT response
7322  */
7323 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7324                                      struct xdr_stream *xdr,
7325                                      void *data)
7326 {
7327         struct nfs4_layoutcommit_res *res = data;
7328         struct compound_hdr hdr;
7329         int status;
7330
7331         status = decode_compound_hdr(xdr, &hdr);
7332         if (status)
7333                 goto out;
7334         status = decode_sequence(xdr, &res->seq_res, rqstp);
7335         if (status)
7336                 goto out;
7337         status = decode_putfh(xdr);
7338         if (status)
7339                 goto out;
7340         status = decode_layoutcommit(xdr, rqstp, res);
7341         if (status)
7342                 goto out;
7343         decode_getfattr(xdr, res->fattr, res->server);
7344 out:
7345         return status;
7346 }
7347
7348 /*
7349  * Decode SECINFO_NO_NAME response
7350  */
7351 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7352                                         struct xdr_stream *xdr,
7353                                         void *data)
7354 {
7355         struct nfs4_secinfo_res *res = data;
7356         struct compound_hdr hdr;
7357         int status;
7358
7359         status = decode_compound_hdr(xdr, &hdr);
7360         if (status)
7361                 goto out;
7362         status = decode_sequence(xdr, &res->seq_res, rqstp);
7363         if (status)
7364                 goto out;
7365         status = decode_putrootfh(xdr);
7366         if (status)
7367                 goto out;
7368         status = decode_secinfo_no_name(xdr, res);
7369 out:
7370         return status;
7371 }
7372
7373 /*
7374  * Decode TEST_STATEID response
7375  */
7376 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7377                                      struct xdr_stream *xdr,
7378                                      void *data)
7379 {
7380         struct nfs41_test_stateid_res *res = data;
7381         struct compound_hdr hdr;
7382         int status;
7383
7384         status = decode_compound_hdr(xdr, &hdr);
7385         if (status)
7386                 goto out;
7387         status = decode_sequence(xdr, &res->seq_res, rqstp);
7388         if (status)
7389                 goto out;
7390         status = decode_test_stateid(xdr, res);
7391 out:
7392         return status;
7393 }
7394
7395 /*
7396  * Decode FREE_STATEID response
7397  */
7398 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7399                                      struct xdr_stream *xdr,
7400                                      void *data)
7401 {
7402         struct nfs41_free_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_free_stateid(xdr, res);
7413 out:
7414         return status;
7415 }
7416 #endif /* CONFIG_NFS_V4_1 */
7417
7418 /**
7419  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7420  *                      the local page cache.
7421  * @xdr: XDR stream where entry resides
7422  * @entry: buffer to fill in with entry data
7423  * @plus: boolean indicating whether this should be a readdirplus entry
7424  *
7425  * Returns zero if successful, otherwise a negative errno value is
7426  * returned.
7427  *
7428  * This function is not invoked during READDIR reply decoding, but
7429  * rather whenever an application invokes the getdents(2) system call
7430  * on a directory already in our cache.
7431  */
7432 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7433                        bool plus)
7434 {
7435         unsigned int savep;
7436         uint32_t bitmap[3] = {0};
7437         uint32_t len;
7438         uint64_t new_cookie;
7439         __be32 *p = xdr_inline_decode(xdr, 4);
7440         if (unlikely(!p))
7441                 return -EAGAIN;
7442         if (*p == xdr_zero) {
7443                 p = xdr_inline_decode(xdr, 4);
7444                 if (unlikely(!p))
7445                         return -EAGAIN;
7446                 if (*p == xdr_zero)
7447                         return -EAGAIN;
7448                 entry->eof = 1;
7449                 return -EBADCOOKIE;
7450         }
7451
7452         p = xdr_inline_decode(xdr, 12);
7453         if (unlikely(!p))
7454                 return -EAGAIN;
7455         p = xdr_decode_hyper(p, &new_cookie);
7456         entry->len = be32_to_cpup(p);
7457
7458         p = xdr_inline_decode(xdr, entry->len);
7459         if (unlikely(!p))
7460                 return -EAGAIN;
7461         entry->name = (const char *) p;
7462
7463         /*
7464          * In case the server doesn't return an inode number,
7465          * we fake one here.  (We don't use inode number 0,
7466          * since glibc seems to choke on it...)
7467          */
7468         entry->ino = 1;
7469         entry->fattr->valid = 0;
7470
7471         if (decode_attr_bitmap(xdr, bitmap) < 0)
7472                 return -EAGAIN;
7473
7474         if (decode_attr_length(xdr, &len, &savep) < 0)
7475                 return -EAGAIN;
7476
7477         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7478                         NULL, entry->label, entry->server) < 0)
7479                 return -EAGAIN;
7480         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7481                 entry->ino = entry->fattr->mounted_on_fileid;
7482         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7483                 entry->ino = entry->fattr->fileid;
7484
7485         entry->d_type = DT_UNKNOWN;
7486         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7487                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7488
7489         entry->prev_cookie = entry->cookie;
7490         entry->cookie = new_cookie;
7491
7492         return 0;
7493 }
7494
7495 /*
7496  * We need to translate between nfs status return values and
7497  * the local errno values which may not be the same.
7498  */
7499 static struct {
7500         int stat;
7501         int errno;
7502 } nfs_errtbl[] = {
7503         { NFS4_OK,              0               },
7504         { NFS4ERR_PERM,         -EPERM          },
7505         { NFS4ERR_NOENT,        -ENOENT         },
7506         { NFS4ERR_IO,           -errno_NFSERR_IO},
7507         { NFS4ERR_NXIO,         -ENXIO          },
7508         { NFS4ERR_ACCESS,       -EACCES         },
7509         { NFS4ERR_EXIST,        -EEXIST         },
7510         { NFS4ERR_XDEV,         -EXDEV          },
7511         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7512         { NFS4ERR_ISDIR,        -EISDIR         },
7513         { NFS4ERR_INVAL,        -EINVAL         },
7514         { NFS4ERR_FBIG,         -EFBIG          },
7515         { NFS4ERR_NOSPC,        -ENOSPC         },
7516         { NFS4ERR_ROFS,         -EROFS          },
7517         { NFS4ERR_MLINK,        -EMLINK         },
7518         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7519         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7520         { NFS4ERR_DQUOT,        -EDQUOT         },
7521         { NFS4ERR_STALE,        -ESTALE         },
7522         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7523         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7524         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7525         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7526         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7527         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7528         { NFS4ERR_LOCKED,       -EAGAIN         },
7529         { NFS4ERR_SYMLINK,      -ELOOP          },
7530         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7531         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7532         { NFS4ERR_NOXATTR,      -ENODATA        },
7533         { NFS4ERR_XATTR2BIG,    -E2BIG          },
7534         { -1,                   -EIO            }
7535 };
7536
7537 /*
7538  * Convert an NFS error code to a local one.
7539  * This one is used jointly by NFSv2 and NFSv3.
7540  */
7541 static int
7542 nfs4_stat_to_errno(int stat)
7543 {
7544         int i;
7545         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7546                 if (nfs_errtbl[i].stat == stat)
7547                         return nfs_errtbl[i].errno;
7548         }
7549         if (stat <= 10000 || stat > 10100) {
7550                 /* The server is looney tunes. */
7551                 return -EREMOTEIO;
7552         }
7553         /* If we cannot translate the error, the recovery routines should
7554          * handle it.
7555          * Note: remaining NFSv4 error codes have values > 10000, so should
7556          * not conflict with native Linux error codes.
7557          */
7558         return -stat;
7559 }
7560
7561 #ifdef CONFIG_NFS_V4_2
7562 #include "nfs42xdr.c"
7563 #endif /* CONFIG_NFS_V4_2 */
7564
7565 #define PROC(proc, argtype, restype)                            \
7566 [NFSPROC4_CLNT_##proc] = {                                      \
7567         .p_proc   = NFSPROC4_COMPOUND,                          \
7568         .p_encode = nfs4_xdr_##argtype,                         \
7569         .p_decode = nfs4_xdr_##restype,                         \
7570         .p_arglen = NFS4_##argtype##_sz,                        \
7571         .p_replen = NFS4_##restype##_sz,                        \
7572         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7573         .p_name   = #proc,                                      \
7574 }
7575
7576 #define STUB(proc)              \
7577 [NFSPROC4_CLNT_##proc] = {      \
7578         .p_name = #proc,        \
7579 }
7580
7581 #if defined(CONFIG_NFS_V4_1)
7582 #define PROC41(proc, argtype, restype)                          \
7583         PROC(proc, argtype, restype)
7584 #else
7585 #define PROC41(proc, argtype, restype)                          \
7586         STUB(proc)
7587 #endif
7588
7589 #if defined(CONFIG_NFS_V4_2)
7590 #define PROC42(proc, argtype, restype)                          \
7591         PROC(proc, argtype, restype)
7592 #else
7593 #define PROC42(proc, argtype, restype)                          \
7594         STUB(proc)
7595 #endif
7596
7597 const struct rpc_procinfo nfs4_procedures[] = {
7598         PROC(READ,              enc_read,               dec_read),
7599         PROC(WRITE,             enc_write,              dec_write),
7600         PROC(COMMIT,            enc_commit,             dec_commit),
7601         PROC(OPEN,              enc_open,               dec_open),
7602         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7603         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7604         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7605         PROC(CLOSE,             enc_close,              dec_close),
7606         PROC(SETATTR,           enc_setattr,            dec_setattr),
7607         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7608         PROC(RENEW,             enc_renew,              dec_renew),
7609         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7610         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7611         PROC(LOCK,              enc_lock,               dec_lock),
7612         PROC(LOCKT,             enc_lockt,              dec_lockt),
7613         PROC(LOCKU,             enc_locku,              dec_locku),
7614         PROC(ACCESS,            enc_access,             dec_access),
7615         PROC(GETATTR,           enc_getattr,            dec_getattr),
7616         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7617         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7618         PROC(REMOVE,            enc_remove,             dec_remove),
7619         PROC(RENAME,            enc_rename,             dec_rename),
7620         PROC(LINK,              enc_link,               dec_link),
7621         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7622         PROC(CREATE,            enc_create,             dec_create),
7623         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7624         PROC(STATFS,            enc_statfs,             dec_statfs),
7625         PROC(READLINK,          enc_readlink,           dec_readlink),
7626         PROC(READDIR,           enc_readdir,            dec_readdir),
7627         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7628         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7629         PROC(GETACL,            enc_getacl,             dec_getacl),
7630         PROC(SETACL,            enc_setacl,             dec_setacl),
7631         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7632         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7633         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7634         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7635         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7636         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7637         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7638         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7639         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7640         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7641         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7642         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7643         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7644         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7645         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7646         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7647         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7648         STUB(GETDEVICELIST),
7649         PROC41(BIND_CONN_TO_SESSION,
7650                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7651         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7652         PROC42(SEEK,            enc_seek,               dec_seek),
7653         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7654         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7655         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7656         PROC42(CLONE,           enc_clone,              dec_clone),
7657         PROC42(COPY,            enc_copy,               dec_copy),
7658         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7659         PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7660         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7661         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7662         PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7663         PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7664         PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7665         PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7666         PROC42(READ_PLUS,       enc_read_plus,          dec_read_plus),
7667 };
7668
7669 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7670 const struct rpc_version nfs_version4 = {
7671         .number                 = 4,
7672         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7673         .procs                  = nfs4_procedures,
7674         .counts                 = nfs_version4_counts,
7675 };