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 #include <linux/fs_struct.h>
  56
  57 #include "nfs4_fs.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 static int nfs4_stat_to_errno(int);
  70
  71 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  72 #ifdef DEBUG
  73 #define NFS4_MAXTAGLEN          20
  74 #else
  75 #define NFS4_MAXTAGLEN          0
  76 #endif
  77
  78 /* lock,open owner id:
  79  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  80  */
  81 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  82 #define lock_owner_id_maxsz     (1 + 1 + 4)
  83 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  84 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  86 #define op_encode_hdr_maxsz     (1)
  87 #define op_decode_hdr_maxsz     (2)
  88 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  90 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  92 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  93                                 (NFS4_FHSIZE >> 2))
  94 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  95 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  96 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  97 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  98 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  99                                 ((3+NFS4_FHSIZE) >> 2))
 100 #define nfs4_fattr_bitmap_maxsz 4
 101 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 102 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 103 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 104 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 107 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 108 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 109 #else
 110 #define nfs4_label_maxsz        0
 111 #endif
 112 /* We support only one layout type per file system */
 113 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 114 /* This is based on getfattr, which uses the most attributes: */
 115 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 116                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 117                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 118                                  decode_mdsthreshold_maxsz))
 119 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 120                                 nfs4_fattr_value_maxsz)
 121 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 122 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 123                                  1 + 2 + 1 + \
 124                                 nfs4_owner_maxsz + \
 125                                 nfs4_group_maxsz + \
 126                                 nfs4_label_maxsz + \
 127                                 4 + 4)
 128 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 129 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 130 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 131 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 132 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 133 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 134  * layout types will be returned.
 135  */
 136 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 137                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 138 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 139 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 140 #define encode_setclientid_maxsz \
 141                                 (op_encode_hdr_maxsz + \
 142                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 143                                 /* client name */ \
 144                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 145                                 1 /* sc_prog */ + \
 146                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 147                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 148                                 1) /* sc_cb_ident */
 149 #define decode_setclientid_maxsz \
 150                                 (op_decode_hdr_maxsz + \
 151                                 2 /* clientid */ + \
 152                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 153                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 154                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 155 #define encode_setclientid_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 158 #define decode_setclientid_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz)
 160 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 161 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 162 #define encode_share_access_maxsz \
 163                                 (2)
 164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 165 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 167 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 168                                 2 + encode_share_access_maxsz + 2 + \
 169                                 open_owner_id_maxsz + \
 170                                 encode_opentype_maxsz + \
 171                                 encode_claim_null_maxsz)
 172 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 174                                 decode_ace_maxsz)
 175 #define decode_change_info_maxsz        (5)
 176 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 177                                 decode_stateid_maxsz + \
 178                                 decode_change_info_maxsz + 1 + \
 179                                 nfs4_fattr_bitmap_maxsz + \
 180                                 decode_delegation_maxsz)
 181 #define encode_open_confirm_maxsz \
 182                                 (op_encode_hdr_maxsz + \
 183                                  encode_stateid_maxsz + 1)
 184 #define decode_open_confirm_maxsz \
 185                                 (op_decode_hdr_maxsz + \
 186                                  decode_stateid_maxsz)
 187 #define encode_open_downgrade_maxsz \
 188                                 (op_encode_hdr_maxsz + \
 189                                  encode_stateid_maxsz + 1 + \
 190                                  encode_share_access_maxsz)
 191 #define decode_open_downgrade_maxsz \
 192                                 (op_decode_hdr_maxsz + \
 193                                  decode_stateid_maxsz)
 194 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 195                                  1 + encode_stateid_maxsz)
 196 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 197                                  decode_stateid_maxsz)
 198 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 199                                  encode_stateid_maxsz + \
 200                                  encode_attrs_maxsz)
 201 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 202                                  nfs4_fattr_bitmap_maxsz)
 203 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 204                                  encode_stateid_maxsz + 3)
 205 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 206 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 207                                  2 + encode_verifier_maxsz + 5 + \
 208                                 nfs4_label_maxsz)
 209 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 210                                  decode_verifier_maxsz)
 211 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 212 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 213 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 214                                  encode_stateid_maxsz + 4)
 215 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 216                                  2 + decode_verifier_maxsz)
 217 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 218 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 219                                  decode_verifier_maxsz)
 220 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 221                                 nfs4_name_maxsz)
 222 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 223                                  decode_change_info_maxsz)
 224 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 225                                 2 * nfs4_name_maxsz)
 226 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 227                                  decode_change_info_maxsz + \
 228                                  decode_change_info_maxsz)
 229 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 230                                 nfs4_name_maxsz)
 231 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 232 #define encode_lockowner_maxsz  (7)
 233 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 234                                  7 + \
 235                                  1 + encode_stateid_maxsz + 1 + \
 236                                  encode_lockowner_maxsz)
 237 #define decode_lock_denied_maxsz \
 238                                 (8 + decode_lockowner_maxsz)
 239 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 240                                  decode_lock_denied_maxsz)
 241 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 242                                 encode_lockowner_maxsz)
 243 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 244                                  decode_lock_denied_maxsz)
 245 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 246                                  encode_stateid_maxsz + \
 247                                  4)
 248 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 249                                  decode_stateid_maxsz)
 250 #define encode_release_lockowner_maxsz \
 251                                 (op_encode_hdr_maxsz + \
 252                                  encode_lockowner_maxsz)
 253 #define decode_release_lockowner_maxsz \
 254                                 (op_decode_hdr_maxsz)
 255 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 256 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 257 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 258                                 1 + nfs4_name_maxsz + \
 259                                 1 + \
 260                                 nfs4_fattr_maxsz)
 261 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 262 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 263                                 1 + 2 + nfs4_name_maxsz + \
 264                                 encode_attrs_maxsz)
 265 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 266                                 decode_change_info_maxsz + \
 267                                 nfs4_fattr_bitmap_maxsz)
 268 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 269 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 270 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 271 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 272 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 273 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 274                                  nfs4_fattr_bitmap_maxsz + 1)
 275 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 276                                  encode_stateid_maxsz + 3)
 277 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 278 #define encode_fs_locations_maxsz \
 279                                 (encode_getattr_maxsz)
 280 #define decode_fs_locations_maxsz \
 281                                 (0)
 282 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 283 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 284
 285 #if defined(CONFIG_NFS_V4_1)
 286 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 287 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 288                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 289
 290 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 291                                 encode_verifier_maxsz + \
 292                                 1 /* co_ownerid.len */ + \
 293                                 /* eia_clientowner */ \
 294                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 295                                 1 /* flags */ + \
 296                                 1 /* spa_how */ + \
 297                                 /* max is SP4_MACH_CRED (for now) */ + \
 298                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 299                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 300                                 1 /* implementation id array of size 1 */ + \
 301                                 1 /* nii_domain */ + \
 302                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 303                                 1 /* nii_name */ + \
 304                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 305                                 3 /* nii_date */)
 306 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 307                                 2 /* eir_clientid */ + \
 308                                 1 /* eir_sequenceid */ + \
 309                                 1 /* eir_flags */ + \
 310                                 1 /* spr_how */ + \
 311                                   /* max is SP4_MACH_CRED (for now) */ + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 314                                 2 /* eir_server_owner.so_minor_id */ + \
 315                                 /* eir_server_owner.so_major_id<> */ \
 316                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 317                                 /* eir_server_scope<> */ \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 319                                 1 /* eir_server_impl_id array length */ + \
 320                                 1 /* nii_domain */ + \
 321                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 322                                 1 /* nii_name */ + \
 323                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 324                                 3 /* nii_date */)
 325 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 326 #define decode_channel_attrs_maxsz  (6 + \
 327                                      1 /* ca_rdma_ird.len */ + \
 328                                      1 /* ca_rdma_ird */)
 329 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 330                                      2 /* csa_clientid */ + \
 331                                      1 /* csa_sequence */ + \
 332                                      1 /* csa_flags */ + \
 333                                      encode_channel_attrs_maxsz + \
 334                                      encode_channel_attrs_maxsz + \
 335                                      1 /* csa_cb_program */ + \
 336                                      1 /* csa_sec_parms.len (1) */ + \
 337                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 338                                      1 /* stamp */ + \
 339                                      1 /* machinename.len */ + \
 340                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 341                                      1 /* uid */ + \
 342                                      1 /* gid */ + \
 343                                      1 /* gids.len (0) */)
 344 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 345                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 346                                      1 /* csr_sequence */ + \
 347                                      1 /* csr_flags */ + \
 348                                      decode_channel_attrs_maxsz + \
 349                                      decode_channel_attrs_maxsz)
 350 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 351                                      /* bctsa_sessid */ \
 352                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 353                                      1 /* bctsa_dir */ + \
 354                                      1 /* bctsa_use_conn_in_rdma_mode */)
 355 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 356                                      /* bctsr_sessid */ \
 357                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 358                                      1 /* bctsr_dir */ + \
 359                                      1 /* bctsr_use_conn_in_rdma_mode */)
 360 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 361 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 362 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 363 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 364 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 365                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 366 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 367                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 368 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 369 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 370 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 371                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 372                                 1 /* layout type */ + \
 373                                 1 /* maxcount */ + \
 374                                 1 /* bitmap size */ + \
 375                                 1 /* notification bitmap length */ + \
 376                                 1 /* notification bitmap, word 0 */)
 377 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 378                                 1 /* layout type */ + \
 379                                 1 /* opaque devaddr4 length */ + \
 380                                   /* devaddr4 payload is read into page */ \
 381                                 1 /* notification bitmap length */ + \
 382                                 1 /* notification bitmap, word 0 */)
 383 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 384                                 encode_stateid_maxsz)
 385 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 386                                 decode_stateid_maxsz + \
 387                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 388 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 389                                 2 /* offset */ + \
 390                                 2 /* length */ + \
 391                                 1 /* reclaim */ + \
 392                                 encode_stateid_maxsz + \
 393                                 1 /* new offset (true) */ + \
 394                                 2 /* last byte written */ + \
 395                                 1 /* nt_timechanged (false) */ + \
 396                                 1 /* layoutupdate4 layout type */ + \
 397                                 1 /* layoutupdate4 opaqueue len */)
 398                                   /* the actual content of layoutupdate4 should
 399                                      be allocated by drivers and spliced in
 400                                      using xdr_write_pages */
 401 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 402 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 403                                 encode_stateid_maxsz + \
 404                                 1 + \
 405                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 406 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 407                                 1 + decode_stateid_maxsz)
 408 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 409 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 410 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 411                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 412 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 413 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 414                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 415 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 416 #else /* CONFIG_NFS_V4_1 */
 417 #define encode_sequence_maxsz   0
 418 #define decode_sequence_maxsz   0
 419 #define encode_layoutreturn_maxsz 0
 420 #define decode_layoutreturn_maxsz 0
 421 #endif /* CONFIG_NFS_V4_1 */
 422
 423 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 424 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 425 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 426                                 encode_sequence_maxsz + \
 427                                 encode_putfh_maxsz + \
 428                                 encode_read_maxsz)
 429 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 430                                 decode_sequence_maxsz + \
 431                                 decode_putfh_maxsz + \
 432                                 decode_read_maxsz)
 433 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 434                                 encode_sequence_maxsz + \
 435                                 encode_putfh_maxsz + \
 436                                 encode_readlink_maxsz)
 437 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 438                                 decode_sequence_maxsz + \
 439                                 decode_putfh_maxsz + \
 440                                 decode_readlink_maxsz)
 441 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_readdir_maxsz)
 445 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 446                                 decode_sequence_maxsz + \
 447                                 decode_putfh_maxsz + \
 448                                 decode_readdir_maxsz)
 449 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 450                                 encode_sequence_maxsz + \
 451                                 encode_putfh_maxsz + \
 452                                 encode_write_maxsz + \
 453                                 encode_getattr_maxsz)
 454 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 455                                 decode_sequence_maxsz + \
 456                                 decode_putfh_maxsz + \
 457                                 decode_write_maxsz + \
 458                                 decode_getattr_maxsz)
 459 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 460                                 encode_sequence_maxsz + \
 461                                 encode_putfh_maxsz + \
 462                                 encode_commit_maxsz)
 463 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 464                                 decode_sequence_maxsz + \
 465                                 decode_putfh_maxsz + \
 466                                 decode_commit_maxsz)
 467 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 468                                 encode_sequence_maxsz + \
 469                                 encode_putfh_maxsz + \
 470                                 encode_open_maxsz + \
 471                                 encode_access_maxsz + \
 472                                 encode_getfh_maxsz + \
 473                                 encode_getattr_maxsz)
 474 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 475                                 decode_sequence_maxsz + \
 476                                 decode_putfh_maxsz + \
 477                                 decode_open_maxsz + \
 478                                 decode_access_maxsz + \
 479                                 decode_getfh_maxsz + \
 480                                 decode_getattr_maxsz)
 481 #define NFS4_enc_open_confirm_sz \
 482                                 (compound_encode_hdr_maxsz + \
 483                                  encode_putfh_maxsz + \
 484                                  encode_open_confirm_maxsz)
 485 #define NFS4_dec_open_confirm_sz \
 486                                 (compound_decode_hdr_maxsz + \
 487                                  decode_putfh_maxsz + \
 488                                  decode_open_confirm_maxsz)
 489 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 490                                         encode_sequence_maxsz + \
 491                                         encode_putfh_maxsz + \
 492                                         encode_open_maxsz + \
 493                                         encode_access_maxsz + \
 494                                         encode_getattr_maxsz)
 495 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 496                                         decode_sequence_maxsz + \
 497                                         decode_putfh_maxsz + \
 498                                         decode_open_maxsz + \
 499                                         decode_access_maxsz + \
 500                                         decode_getattr_maxsz)
 501 #define NFS4_enc_open_downgrade_sz \
 502                                 (compound_encode_hdr_maxsz + \
 503                                  encode_sequence_maxsz + \
 504                                  encode_putfh_maxsz + \
 505                                  encode_open_downgrade_maxsz)
 506 #define NFS4_dec_open_downgrade_sz \
 507                                 (compound_decode_hdr_maxsz + \
 508                                  decode_sequence_maxsz + \
 509                                  decode_putfh_maxsz + \
 510                                  decode_open_downgrade_maxsz)
 511 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 512                                  encode_sequence_maxsz + \
 513                                  encode_putfh_maxsz + \
 514                                  encode_layoutreturn_maxsz + \
 515                                  encode_close_maxsz + \
 516                                  encode_getattr_maxsz)
 517 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 518                                  decode_sequence_maxsz + \
 519                                  decode_putfh_maxsz + \
 520                                  decode_layoutreturn_maxsz + \
 521                                  decode_close_maxsz + \
 522                                  decode_getattr_maxsz)
 523 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 524                                  encode_sequence_maxsz + \
 525                                  encode_putfh_maxsz + \
 526                                  encode_setattr_maxsz + \
 527                                  encode_getattr_maxsz)
 528 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 529                                  decode_sequence_maxsz + \
 530                                  decode_putfh_maxsz + \
 531                                  decode_setattr_maxsz + \
 532                                  decode_getattr_maxsz)
 533 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 534                                 encode_sequence_maxsz + \
 535                                 encode_putfh_maxsz + \
 536                                 encode_fsinfo_maxsz)
 537 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 538                                 decode_sequence_maxsz + \
 539                                 decode_putfh_maxsz + \
 540                                 decode_fsinfo_maxsz)
 541 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 542                                 encode_renew_maxsz)
 543 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 544                                 decode_renew_maxsz)
 545 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 546                                 encode_setclientid_maxsz)
 547 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 548                                 decode_setclientid_maxsz)
 549 #define NFS4_enc_setclientid_confirm_sz \
 550                                 (compound_encode_hdr_maxsz + \
 551                                 encode_setclientid_confirm_maxsz)
 552 #define NFS4_dec_setclientid_confirm_sz \
 553                                 (compound_decode_hdr_maxsz + \
 554                                 decode_setclientid_confirm_maxsz)
 555 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 556                                 encode_sequence_maxsz + \
 557                                 encode_putfh_maxsz + \
 558                                 encode_lock_maxsz)
 559 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 560                                 decode_sequence_maxsz + \
 561                                 decode_putfh_maxsz + \
 562                                 decode_lock_maxsz)
 563 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 564                                 encode_sequence_maxsz + \
 565                                 encode_putfh_maxsz + \
 566                                 encode_lockt_maxsz)
 567 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 568                                  decode_sequence_maxsz + \
 569                                  decode_putfh_maxsz + \
 570                                  decode_lockt_maxsz)
 571 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 572                                 encode_sequence_maxsz + \
 573                                 encode_putfh_maxsz + \
 574                                 encode_locku_maxsz)
 575 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 576                                 decode_sequence_maxsz + \
 577                                 decode_putfh_maxsz + \
 578                                 decode_locku_maxsz)
 579 #define NFS4_enc_release_lockowner_sz \
 580                                 (compound_encode_hdr_maxsz + \
 581                                  encode_lockowner_maxsz)
 582 #define NFS4_dec_release_lockowner_sz \
 583                                 (compound_decode_hdr_maxsz + \
 584                                  decode_lockowner_maxsz)
 585 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 586                                 encode_sequence_maxsz + \
 587                                 encode_putfh_maxsz + \
 588                                 encode_access_maxsz + \
 589                                 encode_getattr_maxsz)
 590 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 591                                 decode_sequence_maxsz + \
 592                                 decode_putfh_maxsz + \
 593                                 decode_access_maxsz + \
 594                                 decode_getattr_maxsz)
 595 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 596                                 encode_sequence_maxsz + \
 597                                 encode_putfh_maxsz + \
 598                                 encode_getattr_maxsz + \
 599                                 encode_renew_maxsz)
 600 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 601                                 decode_sequence_maxsz + \
 602                                 decode_putfh_maxsz + \
 603                                 decode_getattr_maxsz + \
 604                                 decode_renew_maxsz)
 605 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 606                                 encode_sequence_maxsz + \
 607                                 encode_putfh_maxsz + \
 608                                 encode_lookup_maxsz + \
 609                                 encode_getattr_maxsz + \
 610                                 encode_getfh_maxsz)
 611 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 612                                 decode_sequence_maxsz + \
 613                                 decode_putfh_maxsz + \
 614                                 decode_lookup_maxsz + \
 615                                 decode_getattr_maxsz + \
 616                                 decode_getfh_maxsz)
 617 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 618                                 encode_sequence_maxsz + \
 619                                 encode_putrootfh_maxsz + \
 620                                 encode_getattr_maxsz + \
 621                                 encode_getfh_maxsz)
 622 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 623                                 decode_sequence_maxsz + \
 624                                 decode_putrootfh_maxsz + \
 625                                 decode_getattr_maxsz + \
 626                                 decode_getfh_maxsz)
 627 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 628                                 encode_sequence_maxsz + \
 629                                 encode_putfh_maxsz + \
 630                                 encode_remove_maxsz)
 631 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 632                                 decode_sequence_maxsz + \
 633                                 decode_putfh_maxsz + \
 634                                 decode_remove_maxsz)
 635 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 636                                 encode_sequence_maxsz + \
 637                                 encode_putfh_maxsz + \
 638                                 encode_savefh_maxsz + \
 639                                 encode_putfh_maxsz + \
 640                                 encode_rename_maxsz)
 641 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 642                                 decode_sequence_maxsz + \
 643                                 decode_putfh_maxsz + \
 644                                 decode_savefh_maxsz + \
 645                                 decode_putfh_maxsz + \
 646                                 decode_rename_maxsz)
 647 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 648                                 encode_sequence_maxsz + \
 649                                 encode_putfh_maxsz + \
 650                                 encode_savefh_maxsz + \
 651                                 encode_putfh_maxsz + \
 652                                 encode_link_maxsz + \
 653                                 encode_restorefh_maxsz + \
 654                                 encode_getattr_maxsz)
 655 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 656                                 decode_sequence_maxsz + \
 657                                 decode_putfh_maxsz + \
 658                                 decode_savefh_maxsz + \
 659                                 decode_putfh_maxsz + \
 660                                 decode_link_maxsz + \
 661                                 decode_restorefh_maxsz + \
 662                                 decode_getattr_maxsz)
 663 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 664                                 encode_sequence_maxsz + \
 665                                 encode_putfh_maxsz + \
 666                                 encode_symlink_maxsz + \
 667                                 encode_getattr_maxsz + \
 668                                 encode_getfh_maxsz)
 669 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 670                                 decode_sequence_maxsz + \
 671                                 decode_putfh_maxsz + \
 672                                 decode_symlink_maxsz + \
 673                                 decode_getattr_maxsz + \
 674                                 decode_getfh_maxsz)
 675 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 676                                 encode_sequence_maxsz + \
 677                                 encode_putfh_maxsz + \
 678                                 encode_create_maxsz + \
 679                                 encode_getfh_maxsz + \
 680                                 encode_getattr_maxsz)
 681 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 682                                 decode_sequence_maxsz + \
 683                                 decode_putfh_maxsz + \
 684                                 decode_create_maxsz + \
 685                                 decode_getfh_maxsz + \
 686                                 decode_getattr_maxsz)
 687 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 688                                 encode_sequence_maxsz + \
 689                                 encode_putfh_maxsz + \
 690                                 encode_getattr_maxsz)
 691 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 692                                 decode_sequence_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_getattr_maxsz)
 695 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 696                                 encode_sequence_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_statfs_maxsz)
 699 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 700                                 decode_sequence_maxsz + \
 701                                 decode_putfh_maxsz + \
 702                                 decode_statfs_maxsz)
 703 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 704                                 encode_sequence_maxsz + \
 705                                 encode_putfh_maxsz + \
 706                                 encode_getattr_maxsz)
 707 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 708                                 decode_sequence_maxsz + \
 709                                 decode_putfh_maxsz + \
 710                                 decode_getattr_maxsz)
 711 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 712                                 encode_sequence_maxsz + \
 713                                 encode_putfh_maxsz + \
 714                                 encode_layoutreturn_maxsz + \
 715                                 encode_delegreturn_maxsz + \
 716                                 encode_getattr_maxsz)
 717 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 718                                 decode_sequence_maxsz + \
 719                                 decode_putfh_maxsz + \
 720                                 decode_layoutreturn_maxsz + \
 721                                 decode_delegreturn_maxsz + \
 722                                 decode_getattr_maxsz)
 723 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 724                                 encode_sequence_maxsz + \
 725                                 encode_putfh_maxsz + \
 726                                 encode_getacl_maxsz)
 727 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 728                                 decode_sequence_maxsz + \
 729                                 decode_putfh_maxsz + \
 730                                 decode_getacl_maxsz)
 731 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 732                                 encode_sequence_maxsz + \
 733                                 encode_putfh_maxsz + \
 734                                 encode_setacl_maxsz)
 735 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 736                                 decode_sequence_maxsz + \
 737                                 decode_putfh_maxsz + \
 738                                 decode_setacl_maxsz)
 739 #define NFS4_enc_fs_locations_sz \
 740                                 (compound_encode_hdr_maxsz + \
 741                                  encode_sequence_maxsz + \
 742                                  encode_putfh_maxsz + \
 743                                  encode_lookup_maxsz + \
 744                                  encode_fs_locations_maxsz + \
 745                                  encode_renew_maxsz)
 746 #define NFS4_dec_fs_locations_sz \
 747                                 (compound_decode_hdr_maxsz + \
 748                                  decode_sequence_maxsz + \
 749                                  decode_putfh_maxsz + \
 750                                  decode_lookup_maxsz + \
 751                                  decode_fs_locations_maxsz + \
 752                                  decode_renew_maxsz)
 753 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 754                                 encode_sequence_maxsz + \
 755                                 encode_putfh_maxsz + \
 756                                 encode_secinfo_maxsz)
 757 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 758                                 decode_sequence_maxsz + \
 759                                 decode_putfh_maxsz + \
 760                                 decode_secinfo_maxsz)
 761 #define NFS4_enc_fsid_present_sz \
 762                                 (compound_encode_hdr_maxsz + \
 763                                  encode_sequence_maxsz + \
 764                                  encode_putfh_maxsz + \
 765                                  encode_getfh_maxsz + \
 766                                  encode_renew_maxsz)
 767 #define NFS4_dec_fsid_present_sz \
 768                                 (compound_decode_hdr_maxsz + \
 769                                  decode_sequence_maxsz + \
 770                                  decode_putfh_maxsz + \
 771                                  decode_getfh_maxsz + \
 772                                  decode_renew_maxsz)
 773 #if defined(CONFIG_NFS_V4_1)
 774 #define NFS4_enc_bind_conn_to_session_sz \
 775                                 (compound_encode_hdr_maxsz + \
 776                                  encode_bind_conn_to_session_maxsz)
 777 #define NFS4_dec_bind_conn_to_session_sz \
 778                                 (compound_decode_hdr_maxsz + \
 779                                  decode_bind_conn_to_session_maxsz)
 780 #define NFS4_enc_exchange_id_sz \
 781                                 (compound_encode_hdr_maxsz + \
 782                                  encode_exchange_id_maxsz)
 783 #define NFS4_dec_exchange_id_sz \
 784                                 (compound_decode_hdr_maxsz + \
 785                                  decode_exchange_id_maxsz)
 786 #define NFS4_enc_create_session_sz \
 787                                 (compound_encode_hdr_maxsz + \
 788                                  encode_create_session_maxsz)
 789 #define NFS4_dec_create_session_sz \
 790                                 (compound_decode_hdr_maxsz + \
 791                                  decode_create_session_maxsz)
 792 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 793                                          encode_destroy_session_maxsz)
 794 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 795                                          decode_destroy_session_maxsz)
 796 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 797                                          encode_destroy_clientid_maxsz)
 798 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 799                                          decode_destroy_clientid_maxsz)
 800 #define NFS4_enc_sequence_sz \
 801                                 (compound_decode_hdr_maxsz + \
 802                                  encode_sequence_maxsz)
 803 #define NFS4_dec_sequence_sz \
 804                                 (compound_decode_hdr_maxsz + \
 805                                  decode_sequence_maxsz)
 806 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 807                                          encode_sequence_maxsz + \
 808                                          encode_putrootfh_maxsz + \
 809                                          encode_fsinfo_maxsz)
 810 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 811                                          decode_sequence_maxsz + \
 812                                          decode_putrootfh_maxsz + \
 813                                          decode_fsinfo_maxsz)
 814 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 815                                          encode_sequence_maxsz + \
 816                                          encode_reclaim_complete_maxsz)
 817 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 818                                          decode_sequence_maxsz + \
 819                                          decode_reclaim_complete_maxsz)
 820 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 821                                 encode_sequence_maxsz +\
 822                                 encode_getdeviceinfo_maxsz)
 823 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 824                                 decode_sequence_maxsz + \
 825                                 decode_getdeviceinfo_maxsz)
 826 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 827                                 encode_sequence_maxsz + \
 828                                 encode_putfh_maxsz +        \
 829                                 encode_layoutget_maxsz)
 830 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 831                                 decode_sequence_maxsz + \
 832                                 decode_putfh_maxsz +        \
 833                                 decode_layoutget_maxsz)
 834 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 835                                 encode_sequence_maxsz +\
 836                                 encode_putfh_maxsz + \
 837                                 encode_layoutcommit_maxsz + \
 838                                 encode_getattr_maxsz)
 839 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 840                                 decode_sequence_maxsz + \
 841                                 decode_putfh_maxsz + \
 842                                 decode_layoutcommit_maxsz + \
 843                                 decode_getattr_maxsz)
 844 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 845                                 encode_sequence_maxsz + \
 846                                 encode_putfh_maxsz + \
 847                                 encode_layoutreturn_maxsz)
 848 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 849                                 decode_sequence_maxsz + \
 850                                 decode_putfh_maxsz + \
 851                                 decode_layoutreturn_maxsz)
 852 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 853                                         encode_sequence_maxsz + \
 854                                         encode_putrootfh_maxsz +\
 855                                         encode_secinfo_no_name_maxsz)
 856 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 857                                         decode_sequence_maxsz + \
 858                                         decode_putrootfh_maxsz + \
 859                                         decode_secinfo_no_name_maxsz)
 860 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 861                                          encode_sequence_maxsz + \
 862                                          encode_test_stateid_maxsz)
 863 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 864                                          decode_sequence_maxsz + \
 865                                          decode_test_stateid_maxsz)
 866 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 867                                          encode_sequence_maxsz + \
 868                                          encode_free_stateid_maxsz)
 869 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 870                                          decode_sequence_maxsz + \
 871                                          decode_free_stateid_maxsz)
 872
 873 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 874                                       compound_encode_hdr_maxsz +
 875                                       encode_sequence_maxsz +
 876                                       encode_putfh_maxsz +
 877                                       encode_getattr_maxsz) *
 878                                      XDR_UNIT);
 879
 880 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 881                                      compound_decode_hdr_maxsz +
 882                                      decode_sequence_maxsz +
 883                                      decode_putfh_maxsz) *
 884                                     XDR_UNIT);
 885
 886 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 887                                            compound_decode_hdr_maxsz +
 888                                            decode_sequence_maxsz) *
 889                                           XDR_UNIT);
 890 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 891 #endif /* CONFIG_NFS_V4_1 */
 892
 893 static const umode_t nfs_type2fmt[] = {
 894         [NF4BAD] = 0,
 895         [NF4REG] = S_IFREG,
 896         [NF4DIR] = S_IFDIR,
 897         [NF4BLK] = S_IFBLK,
 898         [NF4CHR] = S_IFCHR,
 899         [NF4LNK] = S_IFLNK,
 900         [NF4SOCK] = S_IFSOCK,
 901         [NF4FIFO] = S_IFIFO,
 902         [NF4ATTRDIR] = 0,
 903         [NF4NAMEDATTR] = 0,
 904 };
 905
 906 struct compound_hdr {
 907         int32_t         status;
 908         uint32_t        nops;
 909         __be32 *        nops_p;
 910         uint32_t        taglen;
 911         char *          tag;
 912         uint32_t        replen;         /* expected reply words */
 913         u32             minorversion;
 914 };
 915
 916 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 917 {
 918         __be32 *p = xdr_reserve_space(xdr, nbytes);
 919         BUG_ON(!p);
 920         return p;
 921 }
 922
 923 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 924 {
 925         __be32 *p;
 926
 927         p = xdr_reserve_space(xdr, len);
 928         xdr_encode_opaque_fixed(p, buf, len);
 929 }
 930
 931 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 932 {
 933         __be32 *p;
 934
 935         p = reserve_space(xdr, 4 + len);
 936         xdr_encode_opaque(p, str, len);
 937 }
 938
 939 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 940 {
 941         __be32 *p;
 942
 943         p = reserve_space(xdr, 4);
 944         *p = cpu_to_be32(n);
 945 }
 946
 947 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 948 {
 949         __be32 *p;
 950
 951         p = reserve_space(xdr, 8);
 952         xdr_encode_hyper(p, n);
 953 }
 954
 955 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 956                 const struct nfs_seqid *seqid)
 957 {
 958         if (seqid != NULL)
 959                 encode_uint32(xdr, seqid->sequence->counter);
 960         else
 961                 encode_uint32(xdr, 0);
 962 }
 963
 964 static void encode_compound_hdr(struct xdr_stream *xdr,
 965                                 struct rpc_rqst *req,
 966                                 struct compound_hdr *hdr)
 967 {
 968         __be32 *p;
 969         struct rpc_auth *auth = req->rq_cred->cr_auth;
 970
 971         /* initialize running count of expected bytes in reply.
 972          * NOTE: the replied tag SHOULD be the same is the one sent,
 973          * but this is not required as a MUST for the server to do so. */
 974         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 975
 976         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 977         encode_string(xdr, hdr->taglen, hdr->tag);
 978         p = reserve_space(xdr, 8);
 979         *p++ = cpu_to_be32(hdr->minorversion);
 980         hdr->nops_p = p;
 981         *p = cpu_to_be32(hdr->nops);
 982 }
 983
 984 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 985                 uint32_t replen,
 986                 struct compound_hdr *hdr)
 987 {
 988         encode_uint32(xdr, op);
 989         hdr->nops++;
 990         hdr->replen += replen;
 991 }
 992
 993 static void encode_nops(struct compound_hdr *hdr)
 994 {
 995         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 996         *hdr->nops_p = htonl(hdr->nops);
 997 }
 998
 999 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1000 {
1001         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1002 }
1003
1004 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1005 {
1006         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1007 }
1008
1009 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1010                                 const struct nfs4_label *label,
1011                                 const struct nfs_server *server,
1012                                 bool excl_check, const umode_t *umask)
1013 {
1014         char owner_name[IDMAP_NAMESZ];
1015         char owner_group[IDMAP_NAMESZ];
1016         int owner_namelen = 0;
1017         int owner_grouplen = 0;
1018         __be32 *p;
1019         unsigned i;
1020         uint32_t len = 0;
1021         uint32_t bmval_len;
1022         uint32_t bmval[3] = { 0 };
1023
1024         /*
1025          * We reserve enough space to write the entire attribute buffer at once.
1026          */
1027         if (iap->ia_valid & ATTR_SIZE) {
1028                 bmval[0] |= FATTR4_WORD0_SIZE;
1029                 len += 8;
1030         }
1031         if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
1032                 umask = NULL;
1033         if (iap->ia_valid & ATTR_MODE) {
1034                 if (umask) {
1035                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1036                         len += 8;
1037                 } else {
1038                         bmval[1] |= FATTR4_WORD1_MODE;
1039                         len += 4;
1040                 }
1041         }
1042         if (iap->ia_valid & ATTR_UID) {
1043                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1044                 if (owner_namelen < 0) {
1045                         dprintk("nfs: couldn't resolve uid %d to string\n",
1046                                         from_kuid(&init_user_ns, iap->ia_uid));
1047                         /* XXX */
1048                         strcpy(owner_name, "nobody");
1049                         owner_namelen = sizeof("nobody") - 1;
1050                         /* goto out; */
1051                 }
1052                 bmval[1] |= FATTR4_WORD1_OWNER;
1053                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1054         }
1055         if (iap->ia_valid & ATTR_GID) {
1056                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1057                 if (owner_grouplen < 0) {
1058                         dprintk("nfs: couldn't resolve gid %d to string\n",
1059                                         from_kgid(&init_user_ns, iap->ia_gid));
1060                         strcpy(owner_group, "nobody");
1061                         owner_grouplen = sizeof("nobody") - 1;
1062                         /* goto out; */
1063                 }
1064                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1065                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1066         }
1067         if (iap->ia_valid & ATTR_ATIME_SET) {
1068                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1069                 len += 16;
1070         } else if (iap->ia_valid & ATTR_ATIME) {
1071                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1072                 len += 4;
1073         }
1074         if (iap->ia_valid & ATTR_MTIME_SET) {
1075                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1076                 len += 16;
1077         } else if (iap->ia_valid & ATTR_MTIME) {
1078                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1079                 len += 4;
1080         }
1081
1082         if (excl_check) {
1083                 const u32 *excl_bmval = server->exclcreat_bitmask;
1084                 bmval[0] &= excl_bmval[0];
1085                 bmval[1] &= excl_bmval[1];
1086                 bmval[2] &= excl_bmval[2];
1087
1088                 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1089                         label = NULL;
1090         }
1091
1092         if (label) {
1093                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1094                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1095         }
1096
1097         if (bmval[2] != 0)
1098                 bmval_len = 3;
1099         else if (bmval[1] != 0)
1100                 bmval_len = 2;
1101         else
1102                 bmval_len = 1;
1103
1104         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1105
1106         *p++ = cpu_to_be32(bmval_len);
1107         for (i = 0; i < bmval_len; i++)
1108                 *p++ = cpu_to_be32(bmval[i]);
1109         *p++ = cpu_to_be32(len);
1110
1111         if (bmval[0] & FATTR4_WORD0_SIZE)
1112                 p = xdr_encode_hyper(p, iap->ia_size);
1113         if (bmval[1] & FATTR4_WORD1_MODE)
1114                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1115         if (bmval[1] & FATTR4_WORD1_OWNER)
1116                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1117         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1118                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1119         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1120                 if (iap->ia_valid & ATTR_ATIME_SET) {
1121                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1122                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1123                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1124                 } else
1125                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1126         }
1127         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1128                 if (iap->ia_valid & ATTR_MTIME_SET) {
1129                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1130                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1131                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1132                 } else
1133                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1134         }
1135         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1136                 *p++ = cpu_to_be32(label->lfs);
1137                 *p++ = cpu_to_be32(label->pi);
1138                 *p++ = cpu_to_be32(label->len);
1139                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1140         }
1141         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1142                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1143                 *p++ = cpu_to_be32(*umask);
1144         }
1145
1146 /* out: */
1147 }
1148
1149 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1150 {
1151         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1152         encode_uint32(xdr, access);
1153 }
1154
1155 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1156 {
1157         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1158         encode_nfs4_seqid(xdr, arg->seqid);
1159         encode_nfs4_stateid(xdr, &arg->stateid);
1160 }
1161
1162 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1163 {
1164         __be32 *p;
1165
1166         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1167         p = reserve_space(xdr, 12);
1168         p = xdr_encode_hyper(p, args->offset);
1169         *p = cpu_to_be32(args->count);
1170 }
1171
1172 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1173 {
1174         __be32 *p;
1175
1176         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1177         encode_uint32(xdr, create->ftype);
1178
1179         switch (create->ftype) {
1180         case NF4LNK:
1181                 p = reserve_space(xdr, 4);
1182                 *p = cpu_to_be32(create->u.symlink.len);
1183                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1184                                 create->u.symlink.len);
1185                 xdr->buf->flags |= XDRBUF_WRITE;
1186                 break;
1187
1188         case NF4BLK: case NF4CHR:
1189                 p = reserve_space(xdr, 8);
1190                 *p++ = cpu_to_be32(create->u.device.specdata1);
1191                 *p = cpu_to_be32(create->u.device.specdata2);
1192                 break;
1193
1194         default:
1195                 break;
1196         }
1197
1198         encode_string(xdr, create->name->len, create->name->name);
1199         encode_attrs(xdr, create->attrs, create->label, create->server, false,
1200                      &create->umask);
1201 }
1202
1203 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1204 {
1205         __be32 *p;
1206
1207         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1208         p = reserve_space(xdr, 8);
1209         *p++ = cpu_to_be32(1);
1210         *p = cpu_to_be32(bitmap);
1211 }
1212
1213 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216
1217         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218         p = reserve_space(xdr, 12);
1219         *p++ = cpu_to_be32(2);
1220         *p++ = cpu_to_be32(bm0);
1221         *p = cpu_to_be32(bm1);
1222 }
1223
1224 static void
1225 encode_getattr_three(struct xdr_stream *xdr,
1226                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1227                      struct compound_hdr *hdr)
1228 {
1229         __be32 *p;
1230
1231         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1232         if (bm2) {
1233                 p = reserve_space(xdr, 16);
1234                 *p++ = cpu_to_be32(3);
1235                 *p++ = cpu_to_be32(bm0);
1236                 *p++ = cpu_to_be32(bm1);
1237                 *p = cpu_to_be32(bm2);
1238         } else if (bm1) {
1239                 p = reserve_space(xdr, 12);
1240                 *p++ = cpu_to_be32(2);
1241                 *p++ = cpu_to_be32(bm0);
1242                 *p = cpu_to_be32(bm1);
1243         } else {
1244                 p = reserve_space(xdr, 8);
1245                 *p++ = cpu_to_be32(1);
1246                 *p = cpu_to_be32(bm0);
1247         }
1248 }
1249
1250 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1251 {
1252         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1253                            bitmask[1] & nfs4_fattr_bitmap[1],
1254                            bitmask[2] & nfs4_fattr_bitmap[2],
1255                            hdr);
1256 }
1257
1258 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1259                                  const u32 *open_bitmap,
1260                                  struct compound_hdr *hdr)
1261 {
1262         encode_getattr_three(xdr,
1263                              bitmask[0] & open_bitmap[0],
1264                              bitmask[1] & open_bitmap[1],
1265                              bitmask[2] & open_bitmap[2],
1266                              hdr);
1267 }
1268
1269 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1270 {
1271         encode_getattr_three(xdr,
1272                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1273                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1274                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1275                              hdr);
1276 }
1277
1278 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1279 {
1280         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1281                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1282 }
1283
1284 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1285 {
1286         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1287 }
1288
1289 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1290 {
1291         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1292         encode_string(xdr, name->len, name->name);
1293 }
1294
1295 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1296 {
1297         if (fl->fl_type == F_RDLCK)
1298                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1299         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1300 }
1301
1302 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1303 {
1304         if (fl->fl_end == OFFSET_MAX)
1305                 return ~(uint64_t)0;
1306         return fl->fl_end - fl->fl_start + 1;
1307 }
1308
1309 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1310 {
1311         __be32 *p;
1312
1313         p = reserve_space(xdr, 32);
1314         p = xdr_encode_hyper(p, lowner->clientid);
1315         *p++ = cpu_to_be32(20);
1316         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1317         *p++ = cpu_to_be32(lowner->s_dev);
1318         xdr_encode_hyper(p, lowner->id);
1319 }
1320
1321 /*
1322  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1323  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1324  */
1325 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1326 {
1327         __be32 *p;
1328
1329         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1330         p = reserve_space(xdr, 28);
1331         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1332         *p++ = cpu_to_be32(args->reclaim);
1333         p = xdr_encode_hyper(p, args->fl->fl_start);
1334         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335         *p = cpu_to_be32(args->new_lock_owner);
1336         if (args->new_lock_owner){
1337                 encode_nfs4_seqid(xdr, args->open_seqid);
1338                 encode_nfs4_stateid(xdr, &args->open_stateid);
1339                 encode_nfs4_seqid(xdr, args->lock_seqid);
1340                 encode_lockowner(xdr, &args->lock_owner);
1341         }
1342         else {
1343                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1344                 encode_nfs4_seqid(xdr, args->lock_seqid);
1345         }
1346 }
1347
1348 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1349 {
1350         __be32 *p;
1351
1352         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1353         p = reserve_space(xdr, 20);
1354         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1355         p = xdr_encode_hyper(p, args->fl->fl_start);
1356         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357         encode_lockowner(xdr, &args->lock_owner);
1358 }
1359
1360 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1361 {
1362         __be32 *p;
1363
1364         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1365         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1366         encode_nfs4_seqid(xdr, args->seqid);
1367         encode_nfs4_stateid(xdr, &args->stateid);
1368         p = reserve_space(xdr, 16);
1369         p = xdr_encode_hyper(p, args->fl->fl_start);
1370         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1371 }
1372
1373 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1374 {
1375         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1376         encode_lockowner(xdr, lowner);
1377 }
1378
1379 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1380 {
1381         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1382         encode_string(xdr, name->len, name->name);
1383 }
1384
1385 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1386 {
1387         __be32 *p;
1388
1389         p = reserve_space(xdr, 8);
1390         *p++ = cpu_to_be32(share_access);
1391         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1392 }
1393
1394 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1395 {
1396         __be32 *p;
1397  /*
1398  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1399  * owner 4 = 32
1400  */
1401         encode_nfs4_seqid(xdr, arg->seqid);
1402         encode_share_access(xdr, arg->share_access);
1403         p = reserve_space(xdr, 36);
1404         p = xdr_encode_hyper(p, arg->clientid);
1405         *p++ = cpu_to_be32(24);
1406         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1407         *p++ = cpu_to_be32(arg->server->s_dev);
1408         *p++ = cpu_to_be32(arg->id.uniquifier);
1409         xdr_encode_hyper(p, arg->id.create_time);
1410 }
1411
1412 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1413 {
1414         __be32 *p;
1415
1416         p = reserve_space(xdr, 4);
1417         switch(arg->createmode) {
1418         case NFS4_CREATE_UNCHECKED:
1419                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1420                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1421                              &arg->umask);
1422                 break;
1423         case NFS4_CREATE_GUARDED:
1424                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1425                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1426                              &arg->umask);
1427                 break;
1428         case NFS4_CREATE_EXCLUSIVE:
1429                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1430                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1431                 break;
1432         case NFS4_CREATE_EXCLUSIVE4_1:
1433                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1434                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1435                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true,
1436                              &arg->umask);
1437         }
1438 }
1439
1440 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1441 {
1442         __be32 *p;
1443
1444         p = reserve_space(xdr, 4);
1445         switch (arg->open_flags & O_CREAT) {
1446         case 0:
1447                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1448                 break;
1449         default:
1450                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1451                 encode_createmode(xdr, arg);
1452         }
1453 }
1454
1455 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1456 {
1457         __be32 *p;
1458
1459         p = reserve_space(xdr, 4);
1460         switch (delegation_type) {
1461         case 0:
1462                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1463                 break;
1464         case FMODE_READ:
1465                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1466                 break;
1467         case FMODE_WRITE|FMODE_READ:
1468                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1469                 break;
1470         default:
1471                 BUG();
1472         }
1473 }
1474
1475 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1476 {
1477         __be32 *p;
1478
1479         p = reserve_space(xdr, 4);
1480         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1481         encode_string(xdr, name->len, name->name);
1482 }
1483
1484 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1485 {
1486         __be32 *p;
1487
1488         p = reserve_space(xdr, 4);
1489         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1490         encode_delegation_type(xdr, type);
1491 }
1492
1493 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1494 {
1495         __be32 *p;
1496
1497         p = reserve_space(xdr, 4);
1498         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1499         encode_nfs4_stateid(xdr, stateid);
1500         encode_string(xdr, name->len, name->name);
1501 }
1502
1503 static inline void encode_claim_fh(struct xdr_stream *xdr)
1504 {
1505         __be32 *p;
1506
1507         p = reserve_space(xdr, 4);
1508         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1509 }
1510
1511 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1512 {
1513         __be32 *p;
1514
1515         p = reserve_space(xdr, 4);
1516         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1517         encode_nfs4_stateid(xdr, stateid);
1518 }
1519
1520 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1521 {
1522         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1523         encode_openhdr(xdr, arg);
1524         encode_opentype(xdr, arg);
1525         switch (arg->claim) {
1526         case NFS4_OPEN_CLAIM_NULL:
1527                 encode_claim_null(xdr, arg->name);
1528                 break;
1529         case NFS4_OPEN_CLAIM_PREVIOUS:
1530                 encode_claim_previous(xdr, arg->u.delegation_type);
1531                 break;
1532         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1533                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1534                 break;
1535         case NFS4_OPEN_CLAIM_FH:
1536                 encode_claim_fh(xdr);
1537                 break;
1538         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1539                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1540                 break;
1541         default:
1542                 BUG();
1543         }
1544 }
1545
1546 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1547 {
1548         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1549         encode_nfs4_stateid(xdr, arg->stateid);
1550         encode_nfs4_seqid(xdr, arg->seqid);
1551 }
1552
1553 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1554 {
1555         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1556         encode_nfs4_stateid(xdr, &arg->stateid);
1557         encode_nfs4_seqid(xdr, arg->seqid);
1558         encode_share_access(xdr, arg->share_access);
1559 }
1560
1561 static void
1562 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1563 {
1564         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1565         encode_string(xdr, fh->size, fh->data);
1566 }
1567
1568 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1569 {
1570         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1571 }
1572
1573 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1574                         struct compound_hdr *hdr)
1575 {
1576         __be32 *p;
1577
1578         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1579         encode_nfs4_stateid(xdr, &args->stateid);
1580
1581         p = reserve_space(xdr, 12);
1582         p = xdr_encode_hyper(p, args->offset);
1583         *p = cpu_to_be32(args->count);
1584 }
1585
1586 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1587 {
1588         uint32_t attrs[3] = {
1589                 FATTR4_WORD0_RDATTR_ERROR,
1590                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1591         };
1592         uint32_t dircount = readdir->count >> 1;
1593         __be32 *p, verf[2];
1594         uint32_t attrlen = 0;
1595         unsigned int i;
1596
1597         if (readdir->plus) {
1598                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1599                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1600                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1601                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1602                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1603                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1604                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1605                 dircount >>= 1;
1606         }
1607         /* Use mounted_on_fileid only if the server supports it */
1608         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1609                 attrs[0] |= FATTR4_WORD0_FILEID;
1610         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1611                 attrs[i] &= readdir->bitmask[i];
1612                 if (attrs[i] != 0)
1613                         attrlen = i+1;
1614         }
1615
1616         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1617         encode_uint64(xdr, readdir->cookie);
1618         encode_nfs4_verifier(xdr, &readdir->verifier);
1619         p = reserve_space(xdr, 12 + (attrlen << 2));
1620         *p++ = cpu_to_be32(dircount);
1621         *p++ = cpu_to_be32(readdir->count);
1622         *p++ = cpu_to_be32(attrlen);
1623         for (i = 0; i < attrlen; i++)
1624                 *p++ = cpu_to_be32(attrs[i]);
1625         memcpy(verf, readdir->verifier.data, sizeof(verf));
1626
1627         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1628                         __func__,
1629                         (unsigned long long)readdir->cookie,
1630                         verf[0], verf[1],
1631                         attrs[0] & readdir->bitmask[0],
1632                         attrs[1] & readdir->bitmask[1],
1633                         attrs[2] & readdir->bitmask[2]);
1634 }
1635
1636 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1637 {
1638         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1639 }
1640
1641 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1642 {
1643         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1644         encode_string(xdr, name->len, name->name);
1645 }
1646
1647 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1648 {
1649         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1650         encode_string(xdr, oldname->len, oldname->name);
1651         encode_string(xdr, newname->len, newname->name);
1652 }
1653
1654 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1655                          struct compound_hdr *hdr)
1656 {
1657         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1658         encode_uint64(xdr, clid);
1659 }
1660
1661 static void
1662 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1663 {
1664         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1665 }
1666
1667 static void
1668 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1669 {
1670         __be32 *p;
1671
1672         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1673         encode_nfs4_stateid(xdr, &zero_stateid);
1674         p = reserve_space(xdr, 2*4);
1675         *p++ = cpu_to_be32(1);
1676         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1677         p = reserve_space(xdr, 4);
1678         *p = cpu_to_be32(arg->acl_len);
1679         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1680 }
1681
1682 static void
1683 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1684 {
1685         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1686 }
1687
1688 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1689 {
1690         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1691         encode_nfs4_stateid(xdr, &arg->stateid);
1692         encode_attrs(xdr, arg->iap, arg->label, server, false, NULL);
1693 }
1694
1695 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1696 {
1697         __be32 *p;
1698
1699         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1700         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1701
1702         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1703                         setclientid->sc_clnt->cl_owner_id);
1704         p = reserve_space(xdr, 4);
1705         *p = cpu_to_be32(setclientid->sc_prog);
1706         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1707         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1708         p = reserve_space(xdr, 4);
1709         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1710 }
1711
1712 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1713 {
1714         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1715                         decode_setclientid_confirm_maxsz, hdr);
1716         encode_uint64(xdr, arg->clientid);
1717         encode_nfs4_verifier(xdr, &arg->confirm);
1718 }
1719
1720 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1721                          struct compound_hdr *hdr)
1722 {
1723         __be32 *p;
1724
1725         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1726         encode_nfs4_stateid(xdr, &args->stateid);
1727
1728         p = reserve_space(xdr, 16);
1729         p = xdr_encode_hyper(p, args->offset);
1730         *p++ = cpu_to_be32(args->stable);
1731         *p = cpu_to_be32(args->count);
1732
1733         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1734 }
1735
1736 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1737 {
1738         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1739         encode_nfs4_stateid(xdr, stateid);
1740 }
1741
1742 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1743 {
1744         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1745         encode_string(xdr, name->len, name->name);
1746 }
1747
1748 #if defined(CONFIG_NFS_V4_1)
1749 /* NFSv4.1 operations */
1750 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1751                                    struct nfs41_bind_conn_to_session_args *args,
1752                                    struct compound_hdr *hdr)
1753 {
1754         __be32 *p;
1755
1756         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1757                 decode_bind_conn_to_session_maxsz, hdr);
1758         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1759         p = xdr_reserve_space(xdr, 8);
1760         *p++ = cpu_to_be32(args->dir);
1761         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1762 }
1763
1764 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1765 {
1766         unsigned int i;
1767         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1768         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1769                 encode_uint32(xdr, op_map->u.words[i]);
1770 }
1771
1772 static void encode_exchange_id(struct xdr_stream *xdr,
1773                                struct nfs41_exchange_id_args *args,
1774                                struct compound_hdr *hdr)
1775 {
1776         __be32 *p;
1777         char impl_name[IMPL_NAME_LIMIT];
1778         int len = 0;
1779
1780         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1781         encode_nfs4_verifier(xdr, args->verifier);
1782
1783         encode_string(xdr, strlen(args->client->cl_owner_id),
1784                         args->client->cl_owner_id);
1785
1786         encode_uint32(xdr, args->flags);
1787         encode_uint32(xdr, args->state_protect.how);
1788
1789         switch (args->state_protect.how) {
1790         case SP4_NONE:
1791                 break;
1792         case SP4_MACH_CRED:
1793                 encode_op_map(xdr, &args->state_protect.enforce);
1794                 encode_op_map(xdr, &args->state_protect.allow);
1795                 break;
1796         default:
1797                 WARN_ON_ONCE(1);
1798                 break;
1799         }
1800
1801         if (send_implementation_id &&
1802             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1803             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1804                 <= sizeof(impl_name) + 1)
1805                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1806                                utsname()->sysname, utsname()->release,
1807                                utsname()->version, utsname()->machine);
1808
1809         if (len > 0) {
1810                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1811
1812                 encode_string(xdr,
1813                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1814                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1815                 encode_string(xdr, len, impl_name);
1816                 /* just send zeros for nii_date - the date is in nii_name */
1817                 p = reserve_space(xdr, 12);
1818                 p = xdr_encode_hyper(p, 0);
1819                 *p = cpu_to_be32(0);
1820         } else
1821                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1822 }
1823
1824 static void encode_create_session(struct xdr_stream *xdr,
1825                                   struct nfs41_create_session_args *args,
1826                                   struct compound_hdr *hdr)
1827 {
1828         __be32 *p;
1829         struct nfs_client *clp = args->client;
1830         struct rpc_clnt *clnt = clp->cl_rpcclient;
1831         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1832         u32 max_resp_sz_cached;
1833
1834         /*
1835          * Assumes OPEN is the biggest non-idempotent compound.
1836          * 2 is the verifier.
1837          */
1838         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1839                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1840
1841         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1842         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1843         p = xdr_encode_hyper(p, args->clientid);
1844         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1845         *p++ = cpu_to_be32(args->flags);                        /*flags */
1846
1847         /* Fore Channel */
1848         *p++ = cpu_to_be32(0);                          /* header padding size */
1849         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1850         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1851         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1852         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1853         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1854         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1855
1856         /* Back Channel */
1857         *p++ = cpu_to_be32(0);                          /* header padding size */
1858         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1859         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1860         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1861         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1862         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1863         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1864
1865         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1866         *p++ = cpu_to_be32(1);
1867         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1868
1869         /* authsys_parms rfc1831 */
1870         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1871         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1872         *p++ = cpu_to_be32(0);                          /* UID */
1873         *p++ = cpu_to_be32(0);                          /* GID */
1874         *p = cpu_to_be32(0);                            /* No more gids */
1875 }
1876
1877 static void encode_destroy_session(struct xdr_stream *xdr,
1878                                    struct nfs4_session *session,
1879                                    struct compound_hdr *hdr)
1880 {
1881         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1882         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1883 }
1884
1885 static void encode_destroy_clientid(struct xdr_stream *xdr,
1886                                    uint64_t clientid,
1887                                    struct compound_hdr *hdr)
1888 {
1889         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1890         encode_uint64(xdr, clientid);
1891 }
1892
1893 static void encode_reclaim_complete(struct xdr_stream *xdr,
1894                                     struct nfs41_reclaim_complete_args *args,
1895                                     struct compound_hdr *hdr)
1896 {
1897         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1898         encode_uint32(xdr, args->one_fs);
1899 }
1900 #endif /* CONFIG_NFS_V4_1 */
1901
1902 static void encode_sequence(struct xdr_stream *xdr,
1903                             const struct nfs4_sequence_args *args,
1904                             struct compound_hdr *hdr)
1905 {
1906 #if defined(CONFIG_NFS_V4_1)
1907         struct nfs4_session *session;
1908         struct nfs4_slot_table *tp;
1909         struct nfs4_slot *slot = args->sa_slot;
1910         __be32 *p;
1911
1912         tp = slot->table;
1913         session = tp->session;
1914         if (!session)
1915                 return;
1916
1917         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1918
1919         /*
1920          * Sessionid + seqid + slotid + max slotid + cache_this
1921          */
1922         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1923                 "max_slotid=%d cache_this=%d\n",
1924                 __func__,
1925                 ((u32 *)session->sess_id.data)[0],
1926                 ((u32 *)session->sess_id.data)[1],
1927                 ((u32 *)session->sess_id.data)[2],
1928                 ((u32 *)session->sess_id.data)[3],
1929                 slot->seq_nr, slot->slot_nr,
1930                 tp->highest_used_slotid, args->sa_cache_this);
1931         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1932         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1933         *p++ = cpu_to_be32(slot->seq_nr);
1934         *p++ = cpu_to_be32(slot->slot_nr);
1935         *p++ = cpu_to_be32(tp->highest_used_slotid);
1936         *p = cpu_to_be32(args->sa_cache_this);
1937 #endif /* CONFIG_NFS_V4_1 */
1938 }
1939
1940 #ifdef CONFIG_NFS_V4_1
1941 static void
1942 encode_getdeviceinfo(struct xdr_stream *xdr,
1943                      const struct nfs4_getdeviceinfo_args *args,
1944                      struct compound_hdr *hdr)
1945 {
1946         __be32 *p;
1947
1948         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1949         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1950         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1951                                     NFS4_DEVICEID4_SIZE);
1952         *p++ = cpu_to_be32(args->pdev->layout_type);
1953         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1954
1955         p = reserve_space(xdr, 4 + 4);
1956         *p++ = cpu_to_be32(1);                  /* bitmap length */
1957         *p++ = cpu_to_be32(args->notify_types);
1958 }
1959
1960 static void
1961 encode_layoutget(struct xdr_stream *xdr,
1962                       const struct nfs4_layoutget_args *args,
1963                       struct compound_hdr *hdr)
1964 {
1965         __be32 *p;
1966
1967         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1968         p = reserve_space(xdr, 36);
1969         *p++ = cpu_to_be32(0);     /* Signal layout available */
1970         *p++ = cpu_to_be32(args->type);
1971         *p++ = cpu_to_be32(args->range.iomode);
1972         p = xdr_encode_hyper(p, args->range.offset);
1973         p = xdr_encode_hyper(p, args->range.length);
1974         p = xdr_encode_hyper(p, args->minlength);
1975         encode_nfs4_stateid(xdr, &args->stateid);
1976         encode_uint32(xdr, args->maxcount);
1977
1978         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1979                 __func__,
1980                 args->type,
1981                 args->range.iomode,
1982                 (unsigned long)args->range.offset,
1983                 (unsigned long)args->range.length,
1984                 args->maxcount);
1985 }
1986
1987 static int
1988 encode_layoutcommit(struct xdr_stream *xdr,
1989                     struct inode *inode,
1990                     struct nfs4_layoutcommit_args *args,
1991                     struct compound_hdr *hdr)
1992 {
1993         __be32 *p;
1994
1995         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1996                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1997
1998         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1999         p = reserve_space(xdr, 20);
2000         /* Only whole file layouts */
2001         p = xdr_encode_hyper(p, 0); /* offset */
2002         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2003         *p = cpu_to_be32(0); /* reclaim */
2004         encode_nfs4_stateid(xdr, &args->stateid);
2005         if (args->lastbytewritten != U64_MAX) {
2006                 p = reserve_space(xdr, 20);
2007                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2008                 p = xdr_encode_hyper(p, args->lastbytewritten);
2009         } else {
2010                 p = reserve_space(xdr, 12);
2011                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2012         }
2013         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2014         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2015
2016         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2017                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2018                         NFS_I(inode)->layout, xdr, args);
2019         } else {
2020                 encode_uint32(xdr, args->layoutupdate_len);
2021                 if (args->layoutupdate_pages) {
2022                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2023                                         args->layoutupdate_len);
2024                 }
2025         }
2026
2027         return 0;
2028 }
2029
2030 static void
2031 encode_layoutreturn(struct xdr_stream *xdr,
2032                     const struct nfs4_layoutreturn_args *args,
2033                     struct compound_hdr *hdr)
2034 {
2035         const struct pnfs_layoutdriver_type *lr_ops = NFS_SERVER(args->inode)->pnfs_curr_ld;
2036         __be32 *p;
2037
2038         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2039         p = reserve_space(xdr, 16);
2040         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2041         *p++ = cpu_to_be32(args->layout_type);
2042         *p++ = cpu_to_be32(args->range.iomode);
2043         *p = cpu_to_be32(RETURN_FILE);
2044         p = reserve_space(xdr, 16);
2045         p = xdr_encode_hyper(p, args->range.offset);
2046         p = xdr_encode_hyper(p, args->range.length);
2047         spin_lock(&args->inode->i_lock);
2048         encode_nfs4_stateid(xdr, &args->stateid);
2049         spin_unlock(&args->inode->i_lock);
2050         if (args->ld_private->ops && args->ld_private->ops->encode)
2051                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2052         else if (lr_ops->encode_layoutreturn)
2053                 lr_ops->encode_layoutreturn(xdr, args);
2054         else
2055                 encode_uint32(xdr, 0);
2056 }
2057
2058 static int
2059 encode_secinfo_no_name(struct xdr_stream *xdr,
2060                        const struct nfs41_secinfo_no_name_args *args,
2061                        struct compound_hdr *hdr)
2062 {
2063         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2064         encode_uint32(xdr, args->style);
2065         return 0;
2066 }
2067
2068 static void encode_test_stateid(struct xdr_stream *xdr,
2069                                 struct nfs41_test_stateid_args *args,
2070                                 struct compound_hdr *hdr)
2071 {
2072         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2073         encode_uint32(xdr, 1);
2074         encode_nfs4_stateid(xdr, args->stateid);
2075 }
2076
2077 static void encode_free_stateid(struct xdr_stream *xdr,
2078                                 struct nfs41_free_stateid_args *args,
2079                                 struct compound_hdr *hdr)
2080 {
2081         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2082         encode_nfs4_stateid(xdr, &args->stateid);
2083 }
2084 #else
2085 static inline void
2086 encode_layoutreturn(struct xdr_stream *xdr,
2087                     const struct nfs4_layoutreturn_args *args,
2088                     struct compound_hdr *hdr)
2089 {
2090 }
2091 #endif /* CONFIG_NFS_V4_1 */
2092
2093 /*
2094  * END OF "GENERIC" ENCODE ROUTINES.
2095  */
2096
2097 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2098 {
2099 #if defined(CONFIG_NFS_V4_1)
2100         struct nfs4_session *session = args->sa_slot->table->session;
2101         if (session)
2102                 return session->clp->cl_mvops->minor_version;
2103 #endif /* CONFIG_NFS_V4_1 */
2104         return 0;
2105 }
2106
2107 /*
2108  * Encode an ACCESS request
2109  */
2110 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2111                                 const struct nfs4_accessargs *args)
2112 {
2113         struct compound_hdr hdr = {
2114                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2115         };
2116
2117         encode_compound_hdr(xdr, req, &hdr);
2118         encode_sequence(xdr, &args->seq_args, &hdr);
2119         encode_putfh(xdr, args->fh, &hdr);
2120         encode_access(xdr, args->access, &hdr);
2121         encode_getfattr(xdr, args->bitmask, &hdr);
2122         encode_nops(&hdr);
2123 }
2124
2125 /*
2126  * Encode LOOKUP request
2127  */
2128 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2129                                 const struct nfs4_lookup_arg *args)
2130 {
2131         struct compound_hdr hdr = {
2132                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2133         };
2134
2135         encode_compound_hdr(xdr, req, &hdr);
2136         encode_sequence(xdr, &args->seq_args, &hdr);
2137         encode_putfh(xdr, args->dir_fh, &hdr);
2138         encode_lookup(xdr, args->name, &hdr);
2139         encode_getfh(xdr, &hdr);
2140         encode_getfattr(xdr, args->bitmask, &hdr);
2141         encode_nops(&hdr);
2142 }
2143
2144 /*
2145  * Encode LOOKUP_ROOT request
2146  */
2147 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2148                                      struct xdr_stream *xdr,
2149                                      const struct nfs4_lookup_root_arg *args)
2150 {
2151         struct compound_hdr hdr = {
2152                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153         };
2154
2155         encode_compound_hdr(xdr, req, &hdr);
2156         encode_sequence(xdr, &args->seq_args, &hdr);
2157         encode_putrootfh(xdr, &hdr);
2158         encode_getfh(xdr, &hdr);
2159         encode_getfattr(xdr, args->bitmask, &hdr);
2160         encode_nops(&hdr);
2161 }
2162
2163 /*
2164  * Encode REMOVE request
2165  */
2166 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2167                                 const struct nfs_removeargs *args)
2168 {
2169         struct compound_hdr hdr = {
2170                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2171         };
2172
2173         encode_compound_hdr(xdr, req, &hdr);
2174         encode_sequence(xdr, &args->seq_args, &hdr);
2175         encode_putfh(xdr, args->fh, &hdr);
2176         encode_remove(xdr, &args->name, &hdr);
2177         encode_nops(&hdr);
2178 }
2179
2180 /*
2181  * Encode RENAME request
2182  */
2183 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2184                                 const struct nfs_renameargs *args)
2185 {
2186         struct compound_hdr hdr = {
2187                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2188         };
2189
2190         encode_compound_hdr(xdr, req, &hdr);
2191         encode_sequence(xdr, &args->seq_args, &hdr);
2192         encode_putfh(xdr, args->old_dir, &hdr);
2193         encode_savefh(xdr, &hdr);
2194         encode_putfh(xdr, args->new_dir, &hdr);
2195         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2196         encode_nops(&hdr);
2197 }
2198
2199 /*
2200  * Encode LINK request
2201  */
2202 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2203                              const struct nfs4_link_arg *args)
2204 {
2205         struct compound_hdr hdr = {
2206                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2207         };
2208
2209         encode_compound_hdr(xdr, req, &hdr);
2210         encode_sequence(xdr, &args->seq_args, &hdr);
2211         encode_putfh(xdr, args->fh, &hdr);
2212         encode_savefh(xdr, &hdr);
2213         encode_putfh(xdr, args->dir_fh, &hdr);
2214         encode_link(xdr, args->name, &hdr);
2215         encode_restorefh(xdr, &hdr);
2216         encode_getfattr(xdr, args->bitmask, &hdr);
2217         encode_nops(&hdr);
2218 }
2219
2220 /*
2221  * Encode CREATE request
2222  */
2223 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2224                                 const struct nfs4_create_arg *args)
2225 {
2226         struct compound_hdr hdr = {
2227                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2228         };
2229
2230         encode_compound_hdr(xdr, req, &hdr);
2231         encode_sequence(xdr, &args->seq_args, &hdr);
2232         encode_putfh(xdr, args->dir_fh, &hdr);
2233         encode_create(xdr, args, &hdr);
2234         encode_getfh(xdr, &hdr);
2235         encode_getfattr(xdr, args->bitmask, &hdr);
2236         encode_nops(&hdr);
2237 }
2238
2239 /*
2240  * Encode SYMLINK request
2241  */
2242 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2243                                  const struct nfs4_create_arg *args)
2244 {
2245         nfs4_xdr_enc_create(req, xdr, args);
2246 }
2247
2248 /*
2249  * Encode GETATTR request
2250  */
2251 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2252                                  const struct nfs4_getattr_arg *args)
2253 {
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         encode_compound_hdr(xdr, req, &hdr);
2259         encode_sequence(xdr, &args->seq_args, &hdr);
2260         encode_putfh(xdr, args->fh, &hdr);
2261         encode_getfattr(xdr, args->bitmask, &hdr);
2262         encode_nops(&hdr);
2263 }
2264
2265 /*
2266  * Encode a CLOSE request
2267  */
2268 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2269                                struct nfs_closeargs *args)
2270 {
2271         struct compound_hdr hdr = {
2272                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2273         };
2274
2275         encode_compound_hdr(xdr, req, &hdr);
2276         encode_sequence(xdr, &args->seq_args, &hdr);
2277         encode_putfh(xdr, args->fh, &hdr);
2278         if (args->lr_args)
2279                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2280         encode_close(xdr, args, &hdr);
2281         if (args->bitmask != NULL)
2282                 encode_getfattr(xdr, args->bitmask, &hdr);
2283         encode_nops(&hdr);
2284 }
2285
2286 /*
2287  * Encode an OPEN request
2288  */
2289 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2290                               struct nfs_openargs *args)
2291 {
2292         struct compound_hdr hdr = {
2293                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2294         };
2295
2296         encode_compound_hdr(xdr, req, &hdr);
2297         encode_sequence(xdr, &args->seq_args, &hdr);
2298         encode_putfh(xdr, args->fh, &hdr);
2299         encode_open(xdr, args, &hdr);
2300         encode_getfh(xdr, &hdr);
2301         if (args->access)
2302                 encode_access(xdr, args->access, &hdr);
2303         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2304         encode_nops(&hdr);
2305 }
2306
2307 /*
2308  * Encode an OPEN_CONFIRM request
2309  */
2310 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2311                                       struct xdr_stream *xdr,
2312                                       struct nfs_open_confirmargs *args)
2313 {
2314         struct compound_hdr hdr = {
2315                 .nops   = 0,
2316         };
2317
2318         encode_compound_hdr(xdr, req, &hdr);
2319         encode_putfh(xdr, args->fh, &hdr);
2320         encode_open_confirm(xdr, args, &hdr);
2321         encode_nops(&hdr);
2322 }
2323
2324 /*
2325  * Encode an OPEN request with no attributes.
2326  */
2327 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2328                                      struct xdr_stream *xdr,
2329                                      struct nfs_openargs *args)
2330 {
2331         struct compound_hdr hdr = {
2332                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2333         };
2334
2335         encode_compound_hdr(xdr, req, &hdr);
2336         encode_sequence(xdr, &args->seq_args, &hdr);
2337         encode_putfh(xdr, args->fh, &hdr);
2338         encode_open(xdr, args, &hdr);
2339         if (args->access)
2340                 encode_access(xdr, args->access, &hdr);
2341         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2342         encode_nops(&hdr);
2343 }
2344
2345 /*
2346  * Encode an OPEN_DOWNGRADE request
2347  */
2348 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2349                                         struct xdr_stream *xdr,
2350                                         struct nfs_closeargs *args)
2351 {
2352         struct compound_hdr hdr = {
2353                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2354         };
2355
2356         encode_compound_hdr(xdr, req, &hdr);
2357         encode_sequence(xdr, &args->seq_args, &hdr);
2358         encode_putfh(xdr, args->fh, &hdr);
2359         encode_open_downgrade(xdr, args, &hdr);
2360         encode_nops(&hdr);
2361 }
2362
2363 /*
2364  * Encode a LOCK request
2365  */
2366 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2367                               struct nfs_lock_args *args)
2368 {
2369         struct compound_hdr hdr = {
2370                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2371         };
2372
2373         encode_compound_hdr(xdr, req, &hdr);
2374         encode_sequence(xdr, &args->seq_args, &hdr);
2375         encode_putfh(xdr, args->fh, &hdr);
2376         encode_lock(xdr, args, &hdr);
2377         encode_nops(&hdr);
2378 }
2379
2380 /*
2381  * Encode a LOCKT request
2382  */
2383 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2384                                struct nfs_lockt_args *args)
2385 {
2386         struct compound_hdr hdr = {
2387                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2388         };
2389
2390         encode_compound_hdr(xdr, req, &hdr);
2391         encode_sequence(xdr, &args->seq_args, &hdr);
2392         encode_putfh(xdr, args->fh, &hdr);
2393         encode_lockt(xdr, args, &hdr);
2394         encode_nops(&hdr);
2395 }
2396
2397 /*
2398  * Encode a LOCKU request
2399  */
2400 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2401                                struct nfs_locku_args *args)
2402 {
2403         struct compound_hdr hdr = {
2404                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2405         };
2406
2407         encode_compound_hdr(xdr, req, &hdr);
2408         encode_sequence(xdr, &args->seq_args, &hdr);
2409         encode_putfh(xdr, args->fh, &hdr);
2410         encode_locku(xdr, args, &hdr);
2411         encode_nops(&hdr);
2412 }
2413
2414 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2415                                            struct xdr_stream *xdr,
2416                                         struct nfs_release_lockowner_args *args)
2417 {
2418         struct compound_hdr hdr = {
2419                 .minorversion = 0,
2420         };
2421
2422         encode_compound_hdr(xdr, req, &hdr);
2423         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2424         encode_nops(&hdr);
2425 }
2426
2427 /*
2428  * Encode a READLINK request
2429  */
2430 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2431                                   const struct nfs4_readlink *args)
2432 {
2433         struct compound_hdr hdr = {
2434                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2435         };
2436
2437         encode_compound_hdr(xdr, req, &hdr);
2438         encode_sequence(xdr, &args->seq_args, &hdr);
2439         encode_putfh(xdr, args->fh, &hdr);
2440         encode_readlink(xdr, args, req, &hdr);
2441
2442         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2443                         args->pgbase, args->pglen);
2444         encode_nops(&hdr);
2445 }
2446
2447 /*
2448  * Encode a READDIR request
2449  */
2450 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2451                                  const struct nfs4_readdir_arg *args)
2452 {
2453         struct compound_hdr hdr = {
2454                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2455         };
2456
2457         encode_compound_hdr(xdr, req, &hdr);
2458         encode_sequence(xdr, &args->seq_args, &hdr);
2459         encode_putfh(xdr, args->fh, &hdr);
2460         encode_readdir(xdr, args, req, &hdr);
2461
2462         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2463                          args->pgbase, args->count);
2464         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2465                         __func__, hdr.replen << 2, args->pages,
2466                         args->pgbase, args->count);
2467         encode_nops(&hdr);
2468 }
2469
2470 /*
2471  * Encode a READ request
2472  */
2473 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2474                               struct nfs_pgio_args *args)
2475 {
2476         struct compound_hdr hdr = {
2477                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2478         };
2479
2480         encode_compound_hdr(xdr, req, &hdr);
2481         encode_sequence(xdr, &args->seq_args, &hdr);
2482         encode_putfh(xdr, args->fh, &hdr);
2483         encode_read(xdr, args, &hdr);
2484
2485         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2486                          args->pages, args->pgbase, args->count);
2487         req->rq_rcv_buf.flags |= XDRBUF_READ;
2488         encode_nops(&hdr);
2489 }
2490
2491 /*
2492  * Encode an SETATTR request
2493  */
2494 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2495                                  struct nfs_setattrargs *args)
2496 {
2497         struct compound_hdr hdr = {
2498                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2499         };
2500
2501         encode_compound_hdr(xdr, req, &hdr);
2502         encode_sequence(xdr, &args->seq_args, &hdr);
2503         encode_putfh(xdr, args->fh, &hdr);
2504         encode_setattr(xdr, args, args->server, &hdr);
2505         encode_getfattr(xdr, args->bitmask, &hdr);
2506         encode_nops(&hdr);
2507 }
2508
2509 /*
2510  * Encode a GETACL request
2511  */
2512 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2513                                 struct nfs_getaclargs *args)
2514 {
2515         struct compound_hdr hdr = {
2516                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2517         };
2518         uint32_t replen;
2519
2520         encode_compound_hdr(xdr, req, &hdr);
2521         encode_sequence(xdr, &args->seq_args, &hdr);
2522         encode_putfh(xdr, args->fh, &hdr);
2523         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2524         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2525
2526         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2527                 args->acl_pages, 0, args->acl_len);
2528
2529         encode_nops(&hdr);
2530 }
2531
2532 /*
2533  * Encode a WRITE request
2534  */
2535 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2536                                struct nfs_pgio_args *args)
2537 {
2538         struct compound_hdr hdr = {
2539                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2540         };
2541
2542         encode_compound_hdr(xdr, req, &hdr);
2543         encode_sequence(xdr, &args->seq_args, &hdr);
2544         encode_putfh(xdr, args->fh, &hdr);
2545         encode_write(xdr, args, &hdr);
2546         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2547         if (args->bitmask)
2548                 encode_getfattr(xdr, args->bitmask, &hdr);
2549         encode_nops(&hdr);
2550 }
2551
2552 /*
2553  *  a COMMIT request
2554  */
2555 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2556                                 struct nfs_commitargs *args)
2557 {
2558         struct compound_hdr hdr = {
2559                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2560         };
2561
2562         encode_compound_hdr(xdr, req, &hdr);
2563         encode_sequence(xdr, &args->seq_args, &hdr);
2564         encode_putfh(xdr, args->fh, &hdr);
2565         encode_commit(xdr, args, &hdr);
2566         encode_nops(&hdr);
2567 }
2568
2569 /*
2570  * FSINFO request
2571  */
2572 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2573                                 struct nfs4_fsinfo_arg *args)
2574 {
2575         struct compound_hdr hdr = {
2576                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577         };
2578
2579         encode_compound_hdr(xdr, req, &hdr);
2580         encode_sequence(xdr, &args->seq_args, &hdr);
2581         encode_putfh(xdr, args->fh, &hdr);
2582         encode_fsinfo(xdr, args->bitmask, &hdr);
2583         encode_nops(&hdr);
2584 }
2585
2586 /*
2587  * a PATHCONF request
2588  */
2589 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2590                                   const struct nfs4_pathconf_arg *args)
2591 {
2592         struct compound_hdr hdr = {
2593                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2594         };
2595
2596         encode_compound_hdr(xdr, req, &hdr);
2597         encode_sequence(xdr, &args->seq_args, &hdr);
2598         encode_putfh(xdr, args->fh, &hdr);
2599         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2600                            &hdr);
2601         encode_nops(&hdr);
2602 }
2603
2604 /*
2605  * a STATFS request
2606  */
2607 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2608                                 const struct nfs4_statfs_arg *args)
2609 {
2610         struct compound_hdr hdr = {
2611                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612         };
2613
2614         encode_compound_hdr(xdr, req, &hdr);
2615         encode_sequence(xdr, &args->seq_args, &hdr);
2616         encode_putfh(xdr, args->fh, &hdr);
2617         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2618                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2619         encode_nops(&hdr);
2620 }
2621
2622 /*
2623  * GETATTR_BITMAP request
2624  */
2625 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2626                                      struct xdr_stream *xdr,
2627                                      struct nfs4_server_caps_arg *args)
2628 {
2629         const u32 *bitmask = args->bitmask;
2630         struct compound_hdr hdr = {
2631                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2632         };
2633
2634         encode_compound_hdr(xdr, req, &hdr);
2635         encode_sequence(xdr, &args->seq_args, &hdr);
2636         encode_putfh(xdr, args->fhandle, &hdr);
2637         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2638         encode_nops(&hdr);
2639 }
2640
2641 /*
2642  * a RENEW request
2643  */
2644 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2645                                struct nfs_client *clp)
2646 {
2647         struct compound_hdr hdr = {
2648                 .nops   = 0,
2649         };
2650
2651         encode_compound_hdr(xdr, req, &hdr);
2652         encode_renew(xdr, clp->cl_clientid, &hdr);
2653         encode_nops(&hdr);
2654 }
2655
2656 /*
2657  * a SETCLIENTID request
2658  */
2659 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2660                                      struct xdr_stream *xdr,
2661                                      struct nfs4_setclientid *sc)
2662 {
2663         struct compound_hdr hdr = {
2664                 .nops   = 0,
2665         };
2666
2667         encode_compound_hdr(xdr, req, &hdr);
2668         encode_setclientid(xdr, sc, &hdr);
2669         encode_nops(&hdr);
2670 }
2671
2672 /*
2673  * a SETCLIENTID_CONFIRM request
2674  */
2675 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2676                                              struct xdr_stream *xdr,
2677                                              struct nfs4_setclientid_res *arg)
2678 {
2679         struct compound_hdr hdr = {
2680                 .nops   = 0,
2681         };
2682
2683         encode_compound_hdr(xdr, req, &hdr);
2684         encode_setclientid_confirm(xdr, arg, &hdr);
2685         encode_nops(&hdr);
2686 }
2687
2688 /*
2689  * DELEGRETURN request
2690  */
2691 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2692                                      struct xdr_stream *xdr,
2693                                      const struct nfs4_delegreturnargs *args)
2694 {
2695         struct compound_hdr hdr = {
2696                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2697         };
2698
2699         encode_compound_hdr(xdr, req, &hdr);
2700         encode_sequence(xdr, &args->seq_args, &hdr);
2701         encode_putfh(xdr, args->fhandle, &hdr);
2702         if (args->lr_args)
2703                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2704         encode_getfattr(xdr, args->bitmask, &hdr);
2705         encode_delegreturn(xdr, args->stateid, &hdr);
2706         encode_nops(&hdr);
2707 }
2708
2709 /*
2710  * Encode FS_LOCATIONS request
2711  */
2712 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2713                                       struct xdr_stream *xdr,
2714                                       struct nfs4_fs_locations_arg *args)
2715 {
2716         struct compound_hdr hdr = {
2717                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2718         };
2719         uint32_t replen;
2720
2721         encode_compound_hdr(xdr, req, &hdr);
2722         encode_sequence(xdr, &args->seq_args, &hdr);
2723         if (args->migration) {
2724                 encode_putfh(xdr, args->fh, &hdr);
2725                 replen = hdr.replen;
2726                 encode_fs_locations(xdr, args->bitmask, &hdr);
2727                 if (args->renew)
2728                         encode_renew(xdr, args->clientid, &hdr);
2729         } else {
2730                 encode_putfh(xdr, args->dir_fh, &hdr);
2731                 encode_lookup(xdr, args->name, &hdr);
2732                 replen = hdr.replen;
2733                 encode_fs_locations(xdr, args->bitmask, &hdr);
2734         }
2735
2736         /* Set up reply kvec to capture returned fs_locations array. */
2737         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2738                         0, PAGE_SIZE);
2739         encode_nops(&hdr);
2740 }
2741
2742 /*
2743  * Encode SECINFO request
2744  */
2745 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2746                                 struct xdr_stream *xdr,
2747                                 struct nfs4_secinfo_arg *args)
2748 {
2749         struct compound_hdr hdr = {
2750                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2751         };
2752
2753         encode_compound_hdr(xdr, req, &hdr);
2754         encode_sequence(xdr, &args->seq_args, &hdr);
2755         encode_putfh(xdr, args->dir_fh, &hdr);
2756         encode_secinfo(xdr, args->name, &hdr);
2757         encode_nops(&hdr);
2758 }
2759
2760 /*
2761  * Encode FSID_PRESENT request
2762  */
2763 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2764                                       struct xdr_stream *xdr,
2765                                       struct nfs4_fsid_present_arg *args)
2766 {
2767         struct compound_hdr hdr = {
2768                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2769         };
2770
2771         encode_compound_hdr(xdr, req, &hdr);
2772         encode_sequence(xdr, &args->seq_args, &hdr);
2773         encode_putfh(xdr, args->fh, &hdr);
2774         encode_getfh(xdr, &hdr);
2775         if (args->renew)
2776                 encode_renew(xdr, args->clientid, &hdr);
2777         encode_nops(&hdr);
2778 }
2779
2780 #if defined(CONFIG_NFS_V4_1)
2781 /*
2782  * BIND_CONN_TO_SESSION request
2783  */
2784 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2785                                 struct xdr_stream *xdr,
2786                                 struct nfs41_bind_conn_to_session_args *args)
2787 {
2788         struct compound_hdr hdr = {
2789                 .minorversion = args->client->cl_mvops->minor_version,
2790         };
2791
2792         encode_compound_hdr(xdr, req, &hdr);
2793         encode_bind_conn_to_session(xdr, args, &hdr);
2794         encode_nops(&hdr);
2795 }
2796
2797 /*
2798  * EXCHANGE_ID request
2799  */
2800 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2801                                      struct xdr_stream *xdr,
2802                                      struct nfs41_exchange_id_args *args)
2803 {
2804         struct compound_hdr hdr = {
2805                 .minorversion = args->client->cl_mvops->minor_version,
2806         };
2807
2808         encode_compound_hdr(xdr, req, &hdr);
2809         encode_exchange_id(xdr, args, &hdr);
2810         encode_nops(&hdr);
2811 }
2812
2813 /*
2814  * a CREATE_SESSION request
2815  */
2816 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2817                                         struct xdr_stream *xdr,
2818                                         struct nfs41_create_session_args *args)
2819 {
2820         struct compound_hdr hdr = {
2821                 .minorversion = args->client->cl_mvops->minor_version,
2822         };
2823
2824         encode_compound_hdr(xdr, req, &hdr);
2825         encode_create_session(xdr, args, &hdr);
2826         encode_nops(&hdr);
2827 }
2828
2829 /*
2830  * a DESTROY_SESSION request
2831  */
2832 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2833                                          struct xdr_stream *xdr,
2834                                          struct nfs4_session *session)
2835 {
2836         struct compound_hdr hdr = {
2837                 .minorversion = session->clp->cl_mvops->minor_version,
2838         };
2839
2840         encode_compound_hdr(xdr, req, &hdr);
2841         encode_destroy_session(xdr, session, &hdr);
2842         encode_nops(&hdr);
2843 }
2844
2845 /*
2846  * a DESTROY_CLIENTID request
2847  */
2848 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2849                                          struct xdr_stream *xdr,
2850                                          struct nfs_client *clp)
2851 {
2852         struct compound_hdr hdr = {
2853                 .minorversion = clp->cl_mvops->minor_version,
2854         };
2855
2856         encode_compound_hdr(xdr, req, &hdr);
2857         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2858         encode_nops(&hdr);
2859 }
2860
2861 /*
2862  * a SEQUENCE request
2863  */
2864 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2865                                   struct nfs4_sequence_args *args)
2866 {
2867         struct compound_hdr hdr = {
2868                 .minorversion = nfs4_xdr_minorversion(args),
2869         };
2870
2871         encode_compound_hdr(xdr, req, &hdr);
2872         encode_sequence(xdr, args, &hdr);
2873         encode_nops(&hdr);
2874 }
2875
2876 /*
2877  * a GET_LEASE_TIME request
2878  */
2879 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2880                                         struct xdr_stream *xdr,
2881                                         struct nfs4_get_lease_time_args *args)
2882 {
2883         struct compound_hdr hdr = {
2884                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2885         };
2886         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2887
2888         encode_compound_hdr(xdr, req, &hdr);
2889         encode_sequence(xdr, &args->la_seq_args, &hdr);
2890         encode_putrootfh(xdr, &hdr);
2891         encode_fsinfo(xdr, lease_bitmap, &hdr);
2892         encode_nops(&hdr);
2893 }
2894
2895 /*
2896  * a RECLAIM_COMPLETE request
2897  */
2898 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2899                                           struct xdr_stream *xdr,
2900                                 struct nfs41_reclaim_complete_args *args)
2901 {
2902         struct compound_hdr hdr = {
2903                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2904         };
2905
2906         encode_compound_hdr(xdr, req, &hdr);
2907         encode_sequence(xdr, &args->seq_args, &hdr);
2908         encode_reclaim_complete(xdr, args, &hdr);
2909         encode_nops(&hdr);
2910 }
2911
2912 /*
2913  * Encode GETDEVICEINFO request
2914  */
2915 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2916                                        struct xdr_stream *xdr,
2917                                        struct nfs4_getdeviceinfo_args *args)
2918 {
2919         struct compound_hdr hdr = {
2920                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2921         };
2922
2923         encode_compound_hdr(xdr, req, &hdr);
2924         encode_sequence(xdr, &args->seq_args, &hdr);
2925         encode_getdeviceinfo(xdr, args, &hdr);
2926
2927         /* set up reply kvec. Subtract notification bitmap max size (2)
2928          * so that notification bitmap is put in xdr_buf tail */
2929         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2930                          args->pdev->pages, args->pdev->pgbase,
2931                          args->pdev->pglen);
2932
2933         encode_nops(&hdr);
2934 }
2935
2936 /*
2937  *  Encode LAYOUTGET request
2938  */
2939 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2940                                    struct xdr_stream *xdr,
2941                                    struct nfs4_layoutget_args *args)
2942 {
2943         struct compound_hdr hdr = {
2944                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2945         };
2946
2947         encode_compound_hdr(xdr, req, &hdr);
2948         encode_sequence(xdr, &args->seq_args, &hdr);
2949         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2950         encode_layoutget(xdr, args, &hdr);
2951
2952         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2953             args->layout.pages, 0, args->layout.pglen);
2954
2955         encode_nops(&hdr);
2956 }
2957
2958 /*
2959  *  Encode LAYOUTCOMMIT request
2960  */
2961 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2962                                       struct xdr_stream *xdr,
2963                                       struct nfs4_layoutcommit_args *args)
2964 {
2965         struct nfs4_layoutcommit_data *data =
2966                 container_of(args, struct nfs4_layoutcommit_data, args);
2967         struct compound_hdr hdr = {
2968                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2969         };
2970
2971         encode_compound_hdr(xdr, req, &hdr);
2972         encode_sequence(xdr, &args->seq_args, &hdr);
2973         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2974         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2975         encode_getfattr(xdr, args->bitmask, &hdr);
2976         encode_nops(&hdr);
2977 }
2978
2979 /*
2980  * Encode LAYOUTRETURN request
2981  */
2982 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2983                                       struct xdr_stream *xdr,
2984                                       struct nfs4_layoutreturn_args *args)
2985 {
2986         struct compound_hdr hdr = {
2987                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2988         };
2989
2990         encode_compound_hdr(xdr, req, &hdr);
2991         encode_sequence(xdr, &args->seq_args, &hdr);
2992         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2993         encode_layoutreturn(xdr, args, &hdr);
2994         encode_nops(&hdr);
2995 }
2996
2997 /*
2998  * Encode SECINFO_NO_NAME request
2999  */
3000 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3001                                         struct xdr_stream *xdr,
3002                                         struct nfs41_secinfo_no_name_args *args)
3003 {
3004         struct compound_hdr hdr = {
3005                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3006         };
3007
3008         encode_compound_hdr(xdr, req, &hdr);
3009         encode_sequence(xdr, &args->seq_args, &hdr);
3010         encode_putrootfh(xdr, &hdr);
3011         encode_secinfo_no_name(xdr, args, &hdr);
3012         encode_nops(&hdr);
3013         return 0;
3014 }
3015
3016 /*
3017  *  Encode TEST_STATEID request
3018  */
3019 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3020                                       struct xdr_stream *xdr,
3021                                       struct nfs41_test_stateid_args *args)
3022 {
3023         struct compound_hdr hdr = {
3024                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3025         };
3026
3027         encode_compound_hdr(xdr, req, &hdr);
3028         encode_sequence(xdr, &args->seq_args, &hdr);
3029         encode_test_stateid(xdr, args, &hdr);
3030         encode_nops(&hdr);
3031 }
3032
3033 /*
3034  *  Encode FREE_STATEID request
3035  */
3036 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3037                                      struct xdr_stream *xdr,
3038                                      struct nfs41_free_stateid_args *args)
3039 {
3040         struct compound_hdr hdr = {
3041                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3042         };
3043
3044         encode_compound_hdr(xdr, req, &hdr);
3045         encode_sequence(xdr, &args->seq_args, &hdr);
3046         encode_free_stateid(xdr, args, &hdr);
3047         encode_nops(&hdr);
3048 }
3049 #endif /* CONFIG_NFS_V4_1 */
3050
3051 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3052 {
3053         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3054                 "Remaining buffer length is %tu words.\n",
3055                 func, xdr->end - xdr->p);
3056 }
3057
3058 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3059 {
3060         __be32 *p;
3061
3062         p = xdr_inline_decode(xdr, 4);
3063         if (unlikely(!p))
3064                 goto out_overflow;
3065         *len = be32_to_cpup(p);
3066         p = xdr_inline_decode(xdr, *len);
3067         if (unlikely(!p))
3068                 goto out_overflow;
3069         *string = (char *)p;
3070         return 0;
3071 out_overflow:
3072         print_overflow_msg(__func__, xdr);
3073         return -EIO;
3074 }
3075
3076 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3077 {
3078         __be32 *p;
3079
3080         p = xdr_inline_decode(xdr, 8);
3081         if (unlikely(!p))
3082                 goto out_overflow;
3083         hdr->status = be32_to_cpup(p++);
3084         hdr->taglen = be32_to_cpup(p);
3085
3086         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3087         if (unlikely(!p))
3088                 goto out_overflow;
3089         hdr->tag = (char *)p;
3090         p += XDR_QUADLEN(hdr->taglen);
3091         hdr->nops = be32_to_cpup(p);
3092         if (unlikely(hdr->nops < 1))
3093                 return nfs4_stat_to_errno(hdr->status);
3094         return 0;
3095 out_overflow:
3096         print_overflow_msg(__func__, xdr);
3097         return -EIO;
3098 }
3099
3100 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3101                 int *nfs_retval)
3102 {
3103         __be32 *p;
3104         uint32_t opnum;
3105         int32_t nfserr;
3106
3107         p = xdr_inline_decode(xdr, 8);
3108         if (unlikely(!p))
3109                 goto out_overflow;
3110         opnum = be32_to_cpup(p++);
3111         if (unlikely(opnum != expected))
3112                 goto out_bad_operation;
3113         nfserr = be32_to_cpup(p);
3114         if (nfserr == NFS_OK)
3115                 *nfs_retval = 0;
3116         else
3117                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3118         return true;
3119 out_bad_operation:
3120         dprintk("nfs: Server returned operation"
3121                 " %d but we issued a request for %d\n",
3122                         opnum, expected);
3123         *nfs_retval = -EREMOTEIO;
3124         return false;
3125 out_overflow:
3126         print_overflow_msg(__func__, xdr);
3127         *nfs_retval = -EIO;
3128         return false;
3129 }
3130
3131 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3132 {
3133         int retval;
3134
3135         __decode_op_hdr(xdr, expected, &retval);
3136         return retval;
3137 }
3138
3139 /* Dummy routine */
3140 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3141 {
3142         __be32 *p;
3143         unsigned int strlen;
3144         char *str;
3145
3146         p = xdr_inline_decode(xdr, 12);
3147         if (likely(p))
3148                 return decode_opaque_inline(xdr, &strlen, &str);
3149         print_overflow_msg(__func__, xdr);
3150         return -EIO;
3151 }
3152
3153 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3154 {
3155         uint32_t bmlen;
3156         __be32 *p;
3157
3158         p = xdr_inline_decode(xdr, 4);
3159         if (unlikely(!p))
3160                 goto out_overflow;
3161         bmlen = be32_to_cpup(p);
3162
3163         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3164         p = xdr_inline_decode(xdr, (bmlen << 2));
3165         if (unlikely(!p))
3166                 goto out_overflow;
3167         if (bmlen > 0) {
3168                 bitmap[0] = be32_to_cpup(p++);
3169                 if (bmlen > 1) {
3170                         bitmap[1] = be32_to_cpup(p++);
3171                         if (bmlen > 2)
3172                                 bitmap[2] = be32_to_cpup(p);
3173                 }
3174         }
3175         return 0;
3176 out_overflow:
3177         print_overflow_msg(__func__, xdr);
3178         return -EIO;
3179 }
3180
3181 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3182 {
3183         __be32 *p;
3184
3185         p = xdr_inline_decode(xdr, 4);
3186         if (unlikely(!p))
3187                 goto out_overflow;
3188         *attrlen = be32_to_cpup(p);
3189         *savep = xdr_stream_pos(xdr);
3190         return 0;
3191 out_overflow:
3192         print_overflow_msg(__func__, xdr);
3193         return -EIO;
3194 }
3195
3196 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3197 {
3198         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3199                 int ret;
3200                 ret = decode_attr_bitmap(xdr, bitmask);
3201                 if (unlikely(ret < 0))
3202                         return ret;
3203                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3204         } else
3205                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3206         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3207                 bitmask[0], bitmask[1], bitmask[2]);
3208         return 0;
3209 }
3210
3211 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3212 {
3213         __be32 *p;
3214         int ret = 0;
3215
3216         *type = 0;
3217         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3218                 return -EIO;
3219         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3220                 p = xdr_inline_decode(xdr, 4);
3221                 if (unlikely(!p))
3222                         goto out_overflow;
3223                 *type = be32_to_cpup(p);
3224                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3225                         dprintk("%s: bad type %d\n", __func__, *type);
3226                         return -EIO;
3227                 }
3228                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3229                 ret = NFS_ATTR_FATTR_TYPE;
3230         }
3231         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3232         return ret;
3233 out_overflow:
3234         print_overflow_msg(__func__, xdr);
3235         return -EIO;
3236 }
3237
3238 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3239                                       uint32_t *bitmap, uint32_t *type)
3240 {
3241         __be32 *p;
3242
3243         *type = 0;
3244         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3245                 return -EIO;
3246         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3247                 p = xdr_inline_decode(xdr, 4);
3248                 if (unlikely(!p))
3249                         goto out_overflow;
3250                 *type = be32_to_cpup(p);
3251                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3252         }
3253         dprintk("%s: expire type=0x%x\n", __func__, *type);
3254         return 0;
3255 out_overflow:
3256         print_overflow_msg(__func__, xdr);
3257         return -EIO;
3258 }
3259
3260 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3261 {
3262         __be32 *p;
3263         int ret = 0;
3264
3265         *change = 0;
3266         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3267                 return -EIO;
3268         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3269                 p = xdr_inline_decode(xdr, 8);
3270                 if (unlikely(!p))
3271                         goto out_overflow;
3272                 xdr_decode_hyper(p, change);
3273                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3274                 ret = NFS_ATTR_FATTR_CHANGE;
3275         }
3276         dprintk("%s: change attribute=%Lu\n", __func__,
3277                         (unsigned long long)*change);
3278         return ret;
3279 out_overflow:
3280         print_overflow_msg(__func__, xdr);
3281         return -EIO;
3282 }
3283
3284 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3285 {
3286         __be32 *p;
3287         int ret = 0;
3288
3289         *size = 0;
3290         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3291                 return -EIO;
3292         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3293                 p = xdr_inline_decode(xdr, 8);
3294                 if (unlikely(!p))
3295                         goto out_overflow;
3296                 xdr_decode_hyper(p, size);
3297                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3298                 ret = NFS_ATTR_FATTR_SIZE;
3299         }
3300         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3301         return ret;
3302 out_overflow:
3303         print_overflow_msg(__func__, xdr);
3304         return -EIO;
3305 }
3306
3307 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3308 {
3309         __be32 *p;
3310
3311         *res = 0;
3312         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3313                 return -EIO;
3314         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3315                 p = xdr_inline_decode(xdr, 4);
3316                 if (unlikely(!p))
3317                         goto out_overflow;
3318                 *res = be32_to_cpup(p);
3319                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3320         }
3321         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3322         return 0;
3323 out_overflow:
3324         print_overflow_msg(__func__, xdr);
3325         return -EIO;
3326 }
3327
3328 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3329 {
3330         __be32 *p;
3331
3332         *res = 0;
3333         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3334                 return -EIO;
3335         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3336                 p = xdr_inline_decode(xdr, 4);
3337                 if (unlikely(!p))
3338                         goto out_overflow;
3339                 *res = be32_to_cpup(p);
3340                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3341         }
3342         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3343         return 0;
3344 out_overflow:
3345         print_overflow_msg(__func__, xdr);
3346         return -EIO;
3347 }
3348
3349 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3350 {
3351         __be32 *p;
3352         int ret = 0;
3353
3354         fsid->major = 0;
3355         fsid->minor = 0;
3356         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3357                 return -EIO;
3358         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3359                 p = xdr_inline_decode(xdr, 16);
3360                 if (unlikely(!p))
3361                         goto out_overflow;
3362                 p = xdr_decode_hyper(p, &fsid->major);
3363                 xdr_decode_hyper(p, &fsid->minor);
3364                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3365                 ret = NFS_ATTR_FATTR_FSID;
3366         }
3367         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3368                         (unsigned long long)fsid->major,
3369                         (unsigned long long)fsid->minor);
3370         return ret;
3371 out_overflow:
3372         print_overflow_msg(__func__, xdr);
3373         return -EIO;
3374 }
3375
3376 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3377 {
3378         __be32 *p;
3379
3380         *res = 60;
3381         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3382                 return -EIO;
3383         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3384                 p = xdr_inline_decode(xdr, 4);
3385                 if (unlikely(!p))
3386                         goto out_overflow;
3387                 *res = be32_to_cpup(p);
3388                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3389         }
3390         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3391         return 0;
3392 out_overflow:
3393         print_overflow_msg(__func__, xdr);
3394         return -EIO;
3395 }
3396
3397 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3398 {
3399         __be32 *p;
3400
3401         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3402                 return -EIO;
3403         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3404                 p = xdr_inline_decode(xdr, 4);
3405                 if (unlikely(!p))
3406                         goto out_overflow;
3407                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3408                 *res = -be32_to_cpup(p);
3409         }
3410         return 0;
3411 out_overflow:
3412         print_overflow_msg(__func__, xdr);
3413         return -EIO;
3414 }
3415
3416 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3417                                  uint32_t *bitmap, uint32_t *bitmask)
3418 {
3419         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3420                 int ret;
3421                 ret = decode_attr_bitmap(xdr, bitmask);
3422                 if (unlikely(ret < 0))
3423                         return ret;
3424                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3425         } else
3426                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3427         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3428                 bitmask[0], bitmask[1], bitmask[2]);
3429         return 0;
3430 }
3431
3432 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3433 {
3434         __be32 *p;
3435         int len;
3436
3437         if (fh != NULL)
3438                 memset(fh, 0, sizeof(*fh));
3439
3440         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3441                 return -EIO;
3442         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3443                 p = xdr_inline_decode(xdr, 4);
3444                 if (unlikely(!p))
3445                         goto out_overflow;
3446                 len = be32_to_cpup(p);
3447                 if (len > NFS4_FHSIZE)
3448                         return -EIO;
3449                 p = xdr_inline_decode(xdr, len);
3450                 if (unlikely(!p))
3451                         goto out_overflow;
3452                 if (fh != NULL) {
3453                         memcpy(fh->data, p, len);
3454                         fh->size = len;
3455                 }
3456                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3457         }
3458         return 0;
3459 out_overflow:
3460         print_overflow_msg(__func__, xdr);
3461         return -EIO;
3462 }
3463
3464 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3465 {
3466         __be32 *p;
3467
3468         *res = 0;
3469         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3470                 return -EIO;
3471         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3472                 p = xdr_inline_decode(xdr, 4);
3473                 if (unlikely(!p))
3474                         goto out_overflow;
3475                 *res = be32_to_cpup(p);
3476                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3477         }
3478         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3479         return 0;
3480 out_overflow:
3481         print_overflow_msg(__func__, xdr);
3482         return -EIO;
3483 }
3484
3485 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3486 {
3487         __be32 *p;
3488         int ret = 0;
3489
3490         *fileid = 0;
3491         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3492                 return -EIO;
3493         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3494                 p = xdr_inline_decode(xdr, 8);
3495                 if (unlikely(!p))
3496                         goto out_overflow;
3497                 xdr_decode_hyper(p, fileid);
3498                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3499                 ret = NFS_ATTR_FATTR_FILEID;
3500         }
3501         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3502         return ret;
3503 out_overflow:
3504         print_overflow_msg(__func__, xdr);
3505         return -EIO;
3506 }
3507
3508 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3509 {
3510         __be32 *p;
3511         int ret = 0;
3512
3513         *fileid = 0;
3514         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3515                 return -EIO;
3516         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3517                 p = xdr_inline_decode(xdr, 8);
3518                 if (unlikely(!p))
3519                         goto out_overflow;
3520                 xdr_decode_hyper(p, fileid);
3521                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3522                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3523         }
3524         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3525         return ret;
3526 out_overflow:
3527         print_overflow_msg(__func__, xdr);
3528         return -EIO;
3529 }
3530
3531 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3532 {
3533         __be32 *p;
3534         int status = 0;
3535
3536         *res = 0;
3537         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3538                 return -EIO;
3539         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3540                 p = xdr_inline_decode(xdr, 8);
3541                 if (unlikely(!p))
3542                         goto out_overflow;
3543                 xdr_decode_hyper(p, res);
3544                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3545         }
3546         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3547         return status;
3548 out_overflow:
3549         print_overflow_msg(__func__, xdr);
3550         return -EIO;
3551 }
3552
3553 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3554 {
3555         __be32 *p;
3556         int status = 0;
3557
3558         *res = 0;
3559         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3560                 return -EIO;
3561         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3562                 p = xdr_inline_decode(xdr, 8);
3563                 if (unlikely(!p))
3564                         goto out_overflow;
3565                 xdr_decode_hyper(p, res);
3566                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3567         }
3568         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3569         return status;
3570 out_overflow:
3571         print_overflow_msg(__func__, xdr);
3572         return -EIO;
3573 }
3574
3575 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3576 {
3577         __be32 *p;
3578         int status = 0;
3579
3580         *res = 0;
3581         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3582                 return -EIO;
3583         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3584                 p = xdr_inline_decode(xdr, 8);
3585                 if (unlikely(!p))
3586                         goto out_overflow;
3587                 xdr_decode_hyper(p, res);
3588                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3589         }
3590         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3591         return status;
3592 out_overflow:
3593         print_overflow_msg(__func__, xdr);
3594         return -EIO;
3595 }
3596
3597 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3598 {
3599         u32 n;
3600         __be32 *p;
3601         int status = 0;
3602
3603         p = xdr_inline_decode(xdr, 4);
3604         if (unlikely(!p))
3605                 goto out_overflow;
3606         n = be32_to_cpup(p);
3607         if (n == 0)
3608                 goto root_path;
3609         dprintk("pathname4: ");
3610         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3611                 dprintk("cannot parse %d components in path\n", n);
3612                 goto out_eio;
3613         }
3614         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3615                 struct nfs4_string *component = &path->components[path->ncomponents];
3616                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3617                 if (unlikely(status != 0))
3618                         goto out_eio;
3619                 ifdebug (XDR)
3620                         pr_cont("%s%.*s ",
3621                                 (path->ncomponents != n ? "/ " : ""),
3622                                 component->len, component->data);
3623         }
3624 out:
3625         return status;
3626 root_path:
3627 /* a root pathname is sent as a zero component4 */
3628         path->ncomponents = 1;
3629         path->components[0].len=0;
3630         path->components[0].data=NULL;
3631         dprintk("pathname4: /\n");
3632         goto out;
3633 out_eio:
3634         dprintk(" status %d", status);
3635         status = -EIO;
3636         goto out;
3637 out_overflow:
3638         print_overflow_msg(__func__, xdr);
3639         return -EIO;
3640 }
3641
3642 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3643 {
3644         int n;
3645         __be32 *p;
3646         int status = -EIO;
3647
3648         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3649                 goto out;
3650         status = 0;
3651         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3652                 goto out;
3653         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3654         status = -EIO;
3655         /* Ignore borken servers that return unrequested attrs */
3656         if (unlikely(res == NULL))
3657                 goto out;
3658         dprintk("%s: fsroot:\n", __func__);
3659         status = decode_pathname(xdr, &res->fs_path);
3660         if (unlikely(status != 0))
3661                 goto out;
3662         p = xdr_inline_decode(xdr, 4);
3663         if (unlikely(!p))
3664                 goto out_overflow;
3665         n = be32_to_cpup(p);
3666         if (n <= 0)
3667                 goto out_eio;
3668         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3669                 u32 m;
3670                 struct nfs4_fs_location *loc;
3671
3672                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3673                         break;
3674                 loc = &res->locations[res->nlocations];
3675                 p = xdr_inline_decode(xdr, 4);
3676                 if (unlikely(!p))
3677                         goto out_overflow;
3678                 m = be32_to_cpup(p);
3679
3680                 dprintk("%s: servers:\n", __func__);
3681                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3682                         struct nfs4_string *server;
3683
3684                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3685                                 unsigned int i;
3686                                 dprintk("%s: using first %u of %u servers "
3687                                         "returned for location %u\n",
3688                                                 __func__,
3689                                                 NFS4_FS_LOCATION_MAXSERVERS,
3690                                                 m, res->nlocations);
3691                                 for (i = loc->nservers; i < m; i++) {
3692                                         unsigned int len;
3693                                         char *data;
3694                                         status = decode_opaque_inline(xdr, &len, &data);
3695                                         if (unlikely(status != 0))
3696                                                 goto out_eio;
3697                                 }
3698                                 break;
3699                         }
3700                         server = &loc->servers[loc->nservers];
3701                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3702                         if (unlikely(status != 0))
3703                                 goto out_eio;
3704                         dprintk("%s ", server->data);
3705                 }
3706                 status = decode_pathname(xdr, &loc->rootpath);
3707                 if (unlikely(status != 0))
3708                         goto out_eio;
3709         }
3710         if (res->nlocations != 0)
3711                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3712 out:
3713         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3714         return status;
3715 out_overflow:
3716         print_overflow_msg(__func__, xdr);
3717 out_eio:
3718         status = -EIO;
3719         goto out;
3720 }
3721
3722 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3723 {
3724         __be32 *p;
3725         int status = 0;
3726
3727         *res = 0;
3728         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3729                 return -EIO;
3730         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3731                 p = xdr_inline_decode(xdr, 8);
3732                 if (unlikely(!p))
3733                         goto out_overflow;
3734                 xdr_decode_hyper(p, res);
3735                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3736         }
3737         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3738         return status;
3739 out_overflow:
3740         print_overflow_msg(__func__, xdr);
3741         return -EIO;
3742 }
3743
3744 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3745 {
3746         __be32 *p;
3747         int status = 0;
3748
3749         *maxlink = 1;
3750         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3751                 return -EIO;
3752         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3753                 p = xdr_inline_decode(xdr, 4);
3754                 if (unlikely(!p))
3755                         goto out_overflow;
3756                 *maxlink = be32_to_cpup(p);
3757                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3758         }
3759         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3760         return status;
3761 out_overflow:
3762         print_overflow_msg(__func__, xdr);
3763         return -EIO;
3764 }
3765
3766 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3767 {
3768         __be32 *p;
3769         int status = 0;
3770
3771         *maxname = 1024;
3772         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3773                 return -EIO;
3774         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3775                 p = xdr_inline_decode(xdr, 4);
3776                 if (unlikely(!p))
3777                         goto out_overflow;
3778                 *maxname = be32_to_cpup(p);
3779                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3780         }
3781         dprintk("%s: maxname=%u\n", __func__, *maxname);
3782         return status;
3783 out_overflow:
3784         print_overflow_msg(__func__, xdr);
3785         return -EIO;
3786 }
3787
3788 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3789 {
3790         __be32 *p;
3791         int status = 0;
3792
3793         *res = 1024;
3794         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3795                 return -EIO;
3796         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3797                 uint64_t maxread;
3798                 p = xdr_inline_decode(xdr, 8);
3799                 if (unlikely(!p))
3800                         goto out_overflow;
3801                 xdr_decode_hyper(p, &maxread);
3802                 if (maxread > 0x7FFFFFFF)
3803                         maxread = 0x7FFFFFFF;
3804                 *res = (uint32_t)maxread;
3805                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3806         }
3807         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3808         return status;
3809 out_overflow:
3810         print_overflow_msg(__func__, xdr);
3811         return -EIO;
3812 }
3813
3814 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3815 {
3816         __be32 *p;
3817         int status = 0;
3818
3819         *res = 1024;
3820         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3821                 return -EIO;
3822         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3823                 uint64_t maxwrite;
3824                 p = xdr_inline_decode(xdr, 8);
3825                 if (unlikely(!p))
3826                         goto out_overflow;
3827                 xdr_decode_hyper(p, &maxwrite);
3828                 if (maxwrite > 0x7FFFFFFF)
3829                         maxwrite = 0x7FFFFFFF;
3830                 *res = (uint32_t)maxwrite;
3831                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3832         }
3833         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3834         return status;
3835 out_overflow:
3836         print_overflow_msg(__func__, xdr);
3837         return -EIO;
3838 }
3839
3840 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3841 {
3842         uint32_t tmp;
3843         __be32 *p;
3844         int ret = 0;
3845
3846         *mode = 0;
3847         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3848                 return -EIO;
3849         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3850                 p = xdr_inline_decode(xdr, 4);
3851                 if (unlikely(!p))
3852                         goto out_overflow;
3853                 tmp = be32_to_cpup(p);
3854                 *mode = tmp & ~S_IFMT;
3855                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3856                 ret = NFS_ATTR_FATTR_MODE;
3857         }
3858         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3859         return ret;
3860 out_overflow:
3861         print_overflow_msg(__func__, xdr);
3862         return -EIO;
3863 }
3864
3865 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3866 {
3867         __be32 *p;
3868         int ret = 0;
3869
3870         *nlink = 1;
3871         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3872                 return -EIO;
3873         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3874                 p = xdr_inline_decode(xdr, 4);
3875                 if (unlikely(!p))
3876                         goto out_overflow;
3877                 *nlink = be32_to_cpup(p);
3878                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3879                 ret = NFS_ATTR_FATTR_NLINK;
3880         }
3881         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3882         return ret;
3883 out_overflow:
3884         print_overflow_msg(__func__, xdr);
3885         return -EIO;
3886 }
3887
3888 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3889                 const struct nfs_server *server, kuid_t *uid,
3890                 struct nfs4_string *owner_name)
3891 {
3892         uint32_t len;
3893         __be32 *p;
3894         int ret = 0;
3895
3896         *uid = make_kuid(&init_user_ns, -2);
3897         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3898                 return -EIO;
3899         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3900                 p = xdr_inline_decode(xdr, 4);
3901                 if (unlikely(!p))
3902                         goto out_overflow;
3903                 len = be32_to_cpup(p);
3904                 p = xdr_inline_decode(xdr, len);
3905                 if (unlikely(!p))
3906                         goto out_overflow;
3907                 if (owner_name != NULL) {
3908                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3909                         if (owner_name->data != NULL) {
3910                                 owner_name->len = len;
3911                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3912                         }
3913                 } else if (len < XDR_MAX_NETOBJ) {
3914                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3915                                 ret = NFS_ATTR_FATTR_OWNER;
3916                         else
3917                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3918                                                 __func__);
3919                 } else
3920                         dprintk("%s: name too long (%u)!\n",
3921                                         __func__, len);
3922                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3923         }
3924         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3925         return ret;
3926 out_overflow:
3927         print_overflow_msg(__func__, xdr);
3928         return -EIO;
3929 }
3930
3931 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3932                 const struct nfs_server *server, kgid_t *gid,
3933                 struct nfs4_string *group_name)
3934 {
3935         uint32_t len;
3936         __be32 *p;
3937         int ret = 0;
3938
3939         *gid = make_kgid(&init_user_ns, -2);
3940         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3941                 return -EIO;
3942         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3943                 p = xdr_inline_decode(xdr, 4);
3944                 if (unlikely(!p))
3945                         goto out_overflow;
3946                 len = be32_to_cpup(p);
3947                 p = xdr_inline_decode(xdr, len);
3948                 if (unlikely(!p))
3949                         goto out_overflow;
3950                 if (group_name != NULL) {
3951                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3952                         if (group_name->data != NULL) {
3953                                 group_name->len = len;
3954                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3955                         }
3956                 } else if (len < XDR_MAX_NETOBJ) {
3957                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3958                                 ret = NFS_ATTR_FATTR_GROUP;
3959                         else
3960                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3961                                                 __func__);
3962                 } else
3963                         dprintk("%s: name too long (%u)!\n",
3964                                         __func__, len);
3965                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3966         }
3967         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3968         return ret;
3969 out_overflow:
3970         print_overflow_msg(__func__, xdr);
3971         return -EIO;
3972 }
3973
3974 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3975 {
3976         uint32_t major = 0, minor = 0;
3977         __be32 *p;
3978         int ret = 0;
3979
3980         *rdev = MKDEV(0,0);
3981         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3982                 return -EIO;
3983         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3984                 dev_t tmp;
3985
3986                 p = xdr_inline_decode(xdr, 8);
3987                 if (unlikely(!p))
3988                         goto out_overflow;
3989                 major = be32_to_cpup(p++);
3990                 minor = be32_to_cpup(p);
3991                 tmp = MKDEV(major, minor);
3992                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3993                         *rdev = tmp;
3994                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3995                 ret = NFS_ATTR_FATTR_RDEV;
3996         }
3997         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3998         return ret;
3999 out_overflow:
4000         print_overflow_msg(__func__, xdr);
4001         return -EIO;
4002 }
4003
4004 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4005 {
4006         __be32 *p;
4007         int status = 0;
4008
4009         *res = 0;
4010         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4011                 return -EIO;
4012         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4013                 p = xdr_inline_decode(xdr, 8);
4014                 if (unlikely(!p))
4015                         goto out_overflow;
4016                 xdr_decode_hyper(p, res);
4017                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4018         }
4019         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4020         return status;
4021 out_overflow:
4022         print_overflow_msg(__func__, xdr);
4023         return -EIO;
4024 }
4025
4026 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4027 {
4028         __be32 *p;
4029         int status = 0;
4030
4031         *res = 0;
4032         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4033                 return -EIO;
4034         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4035                 p = xdr_inline_decode(xdr, 8);
4036                 if (unlikely(!p))
4037                         goto out_overflow;
4038                 xdr_decode_hyper(p, res);
4039                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4040         }
4041         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4042         return status;
4043 out_overflow:
4044         print_overflow_msg(__func__, xdr);
4045         return -EIO;
4046 }
4047
4048 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4049 {
4050         __be32 *p;
4051         int status = 0;
4052
4053         *res = 0;
4054         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4055                 return -EIO;
4056         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4057                 p = xdr_inline_decode(xdr, 8);
4058                 if (unlikely(!p))
4059                         goto out_overflow;
4060                 xdr_decode_hyper(p, res);
4061                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4062         }
4063         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4064         return status;
4065 out_overflow:
4066         print_overflow_msg(__func__, xdr);
4067         return -EIO;
4068 }
4069
4070 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4071 {
4072         __be32 *p;
4073         int ret = 0;
4074
4075         *used = 0;
4076         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4077                 return -EIO;
4078         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4079                 p = xdr_inline_decode(xdr, 8);
4080                 if (unlikely(!p))
4081                         goto out_overflow;
4082                 xdr_decode_hyper(p, used);
4083                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4084                 ret = NFS_ATTR_FATTR_SPACE_USED;
4085         }
4086         dprintk("%s: space used=%Lu\n", __func__,
4087                         (unsigned long long)*used);
4088         return ret;
4089 out_overflow:
4090         print_overflow_msg(__func__, xdr);
4091         return -EIO;
4092 }
4093
4094 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4095 {
4096         __be32 *p;
4097         uint64_t sec;
4098         uint32_t nsec;
4099
4100         p = xdr_inline_decode(xdr, 12);
4101         if (unlikely(!p))
4102                 goto out_overflow;
4103         p = xdr_decode_hyper(p, &sec);
4104         nsec = be32_to_cpup(p);
4105         time->tv_sec = (time_t)sec;
4106         time->tv_nsec = (long)nsec;
4107         return 0;
4108 out_overflow:
4109         print_overflow_msg(__func__, xdr);
4110         return -EIO;
4111 }
4112
4113 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4114 {
4115         int status = 0;
4116
4117         time->tv_sec = 0;
4118         time->tv_nsec = 0;
4119         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4120                 return -EIO;
4121         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4122                 status = decode_attr_time(xdr, time);
4123                 if (status == 0)
4124                         status = NFS_ATTR_FATTR_ATIME;
4125                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4126         }
4127         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4128         return status;
4129 }
4130
4131 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4132 {
4133         int status = 0;
4134
4135         time->tv_sec = 0;
4136         time->tv_nsec = 0;
4137         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4138                 return -EIO;
4139         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4140                 status = decode_attr_time(xdr, time);
4141                 if (status == 0)
4142                         status = NFS_ATTR_FATTR_CTIME;
4143                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4144         }
4145         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4146         return status;
4147 }
4148
4149 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4150                                   struct timespec *time)
4151 {
4152         int status = 0;
4153
4154         time->tv_sec = 0;
4155         time->tv_nsec = 0;
4156         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4157                 return -EIO;
4158         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4159                 status = decode_attr_time(xdr, time);
4160                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4161         }
4162         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4163                 (long)time->tv_nsec);
4164         return status;
4165 }
4166
4167 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4168                                         struct nfs4_label *label)
4169 {
4170         uint32_t pi = 0;
4171         uint32_t lfs = 0;
4172         __u32 len;
4173         __be32 *p;
4174         int status = 0;
4175
4176         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4177                 return -EIO;
4178         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4179                 p = xdr_inline_decode(xdr, 4);
4180                 if (unlikely(!p))
4181                         goto out_overflow;
4182                 lfs = be32_to_cpup(p++);
4183                 p = xdr_inline_decode(xdr, 4);
4184                 if (unlikely(!p))
4185                         goto out_overflow;
4186                 pi = be32_to_cpup(p++);
4187                 p = xdr_inline_decode(xdr, 4);
4188                 if (unlikely(!p))
4189                         goto out_overflow;
4190                 len = be32_to_cpup(p++);
4191                 p = xdr_inline_decode(xdr, len);
4192                 if (unlikely(!p))
4193                         goto out_overflow;
4194                 if (len < NFS4_MAXLABELLEN) {
4195                         if (label) {
4196                                 memcpy(label->label, p, len);
4197                                 label->len = len;
4198                                 label->pi = pi;
4199                                 label->lfs = lfs;
4200                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4201                         }
4202                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4203                 } else
4204                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4205                                         __func__, len);
4206         }
4207         if (label && label->label)
4208                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4209                         (char *)label->label, label->len, label->pi, label->lfs);
4210         return status;
4211
4212 out_overflow:
4213         print_overflow_msg(__func__, xdr);
4214         return -EIO;
4215 }
4216
4217 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4218 {
4219         int status = 0;
4220
4221         time->tv_sec = 0;
4222         time->tv_nsec = 0;
4223         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4224                 return -EIO;
4225         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4226                 status = decode_attr_time(xdr, time);
4227                 if (status == 0)
4228                         status = NFS_ATTR_FATTR_MTIME;
4229                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4230         }
4231         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4232         return status;
4233 }
4234
4235 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4236 {
4237         unsigned int attrwords = XDR_QUADLEN(attrlen);
4238         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4239
4240         if (unlikely(attrwords != nwords)) {
4241                 dprintk("%s: server returned incorrect attribute length: "
4242                         "%u %c %u\n",
4243                                 __func__,
4244                                 attrwords << 2,
4245                                 (attrwords < nwords) ? '<' : '>',
4246                                 nwords << 2);
4247                 return -EIO;
4248         }
4249         return 0;
4250 }
4251
4252 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4253 {
4254         __be32 *p;
4255
4256         p = xdr_inline_decode(xdr, 20);
4257         if (unlikely(!p))
4258                 goto out_overflow;
4259         cinfo->atomic = be32_to_cpup(p++);
4260         p = xdr_decode_hyper(p, &cinfo->before);
4261         xdr_decode_hyper(p, &cinfo->after);
4262         return 0;
4263 out_overflow:
4264         print_overflow_msg(__func__, xdr);
4265         return -EIO;
4266 }
4267
4268 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4269 {
4270         __be32 *p;
4271         uint32_t supp, acc;
4272         int status;
4273
4274         status = decode_op_hdr(xdr, OP_ACCESS);
4275         if (status)
4276                 return status;
4277         p = xdr_inline_decode(xdr, 8);
4278         if (unlikely(!p))
4279                 goto out_overflow;
4280         supp = be32_to_cpup(p++);
4281         acc = be32_to_cpup(p);
4282         *supported = supp;
4283         *access = acc;
4284         return 0;
4285 out_overflow:
4286         print_overflow_msg(__func__, xdr);
4287         return -EIO;
4288 }
4289
4290 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4291 {
4292         __be32 *p;
4293
4294         p = xdr_inline_decode(xdr, len);
4295         if (likely(p)) {
4296                 memcpy(buf, p, len);
4297                 return 0;
4298         }
4299         print_overflow_msg(__func__, xdr);
4300         return -EIO;
4301 }
4302
4303 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4304 {
4305         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4306 }
4307
4308 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4309 {
4310         stateid->type = NFS4_OPEN_STATEID_TYPE;
4311         return decode_stateid(xdr, stateid);
4312 }
4313
4314 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4315 {
4316         stateid->type = NFS4_LOCK_STATEID_TYPE;
4317         return decode_stateid(xdr, stateid);
4318 }
4319
4320 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4321 {
4322         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4323         return decode_stateid(xdr, stateid);
4324 }
4325
4326 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4327 {
4328         int status;
4329
4330         status = decode_op_hdr(xdr, OP_CLOSE);
4331         if (status != -EIO)
4332                 nfs_increment_open_seqid(status, res->seqid);
4333         if (!status)
4334                 status = decode_open_stateid(xdr, &res->stateid);
4335         return status;
4336 }
4337
4338 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4339 {
4340         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4341 }
4342
4343 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4344 {
4345         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4346 }
4347
4348 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4349 {
4350         int status;
4351
4352         status = decode_op_hdr(xdr, OP_COMMIT);
4353         if (!status)
4354                 status = decode_write_verifier(xdr, &res->verf->verifier);
4355         return status;
4356 }
4357
4358 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4359 {
4360         __be32 *p;
4361         uint32_t bmlen;
4362         int status;
4363
4364         status = decode_op_hdr(xdr, OP_CREATE);
4365         if (status)
4366                 return status;
4367         if ((status = decode_change_info(xdr, cinfo)))
4368                 return status;
4369         p = xdr_inline_decode(xdr, 4);
4370         if (unlikely(!p))
4371                 goto out_overflow;
4372         bmlen = be32_to_cpup(p);
4373         p = xdr_inline_decode(xdr, bmlen << 2);
4374         if (likely(p))
4375                 return 0;
4376 out_overflow:
4377         print_overflow_msg(__func__, xdr);
4378         return -EIO;
4379 }
4380
4381 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4382 {
4383         unsigned int savep;
4384         uint32_t attrlen, bitmap[3] = {0};
4385         int status;
4386
4387         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4388                 goto xdr_error;
4389         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4390                 goto xdr_error;
4391         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4392                 goto xdr_error;
4393         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4394                 goto xdr_error;
4395         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4396                                                  &res->fh_expire_type)) != 0)
4397                 goto xdr_error;
4398         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4399                 goto xdr_error;
4400         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4401                 goto xdr_error;
4402         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4403                 goto xdr_error;
4404         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4405                                 res->exclcreat_bitmask)) != 0)
4406                 goto xdr_error;
4407         status = verify_attr_len(xdr, savep, attrlen);
4408 xdr_error:
4409         dprintk("%s: xdr returned %d!\n", __func__, -status);
4410         return status;
4411 }
4412
4413 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4414 {
4415         unsigned int savep;
4416         uint32_t attrlen, bitmap[3] = {0};
4417         int status;
4418
4419         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4420                 goto xdr_error;
4421         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4422                 goto xdr_error;
4423         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4424                 goto xdr_error;
4425
4426         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4427                 goto xdr_error;
4428         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4429                 goto xdr_error;
4430         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4431                 goto xdr_error;
4432
4433         status = -EIO;
4434         if (unlikely(bitmap[0]))
4435                 goto xdr_error;
4436
4437         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4438                 goto xdr_error;
4439         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4440                 goto xdr_error;
4441         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4442                 goto xdr_error;
4443
4444         status = verify_attr_len(xdr, savep, attrlen);
4445 xdr_error:
4446         dprintk("%s: xdr returned %d!\n", __func__, -status);
4447         return status;
4448 }
4449
4450 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4451 {
4452         unsigned int savep;
4453         uint32_t attrlen, bitmap[3] = {0};
4454         int status;
4455
4456         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4457                 goto xdr_error;
4458         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4459                 goto xdr_error;
4460         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4461                 goto xdr_error;
4462
4463         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4464                 goto xdr_error;
4465         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4466                 goto xdr_error;
4467
4468         status = verify_attr_len(xdr, savep, attrlen);
4469 xdr_error:
4470         dprintk("%s: xdr returned %d!\n", __func__, -status);
4471         return status;
4472 }
4473
4474 static int decode_threshold_hint(struct xdr_stream *xdr,
4475                                   uint32_t *bitmap,
4476                                   uint64_t *res,
4477                                   uint32_t hint_bit)
4478 {
4479         __be32 *p;
4480
4481         *res = 0;
4482         if (likely(bitmap[0] & hint_bit)) {
4483                 p = xdr_inline_decode(xdr, 8);
4484                 if (unlikely(!p))
4485                         goto out_overflow;
4486                 xdr_decode_hyper(p, res);
4487         }
4488         return 0;
4489 out_overflow:
4490         print_overflow_msg(__func__, xdr);
4491         return -EIO;
4492 }
4493
4494 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4495                                         struct nfs4_threshold *res)
4496 {
4497         __be32 *p;
4498         unsigned int savep;
4499         uint32_t bitmap[3] = {0,}, attrlen;
4500         int status;
4501
4502         /* layout type */
4503         p = xdr_inline_decode(xdr, 4);
4504         if (unlikely(!p)) {
4505                 print_overflow_msg(__func__, xdr);
4506                 return -EIO;
4507         }
4508         res->l_type = be32_to_cpup(p);
4509
4510         /* thi_hintset bitmap */
4511         status = decode_attr_bitmap(xdr, bitmap);
4512         if (status < 0)
4513                 goto xdr_error;
4514
4515         /* thi_hintlist length */
4516         status = decode_attr_length(xdr, &attrlen, &savep);
4517         if (status < 0)
4518                 goto xdr_error;
4519         /* thi_hintlist */
4520         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4521         if (status < 0)
4522                 goto xdr_error;
4523         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4524         if (status < 0)
4525                 goto xdr_error;
4526         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4527                                        THRESHOLD_RD_IO);
4528         if (status < 0)
4529                 goto xdr_error;
4530         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4531                                        THRESHOLD_WR_IO);
4532         if (status < 0)
4533                 goto xdr_error;
4534
4535         status = verify_attr_len(xdr, savep, attrlen);
4536         res->bm = bitmap[0];
4537
4538         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4539                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4540                 res->wr_io_sz);
4541 xdr_error:
4542         dprintk("%s ret=%d!\n", __func__, status);
4543         return status;
4544 }
4545
4546 /*
4547  * Thresholds on pNFS direct I/O vrs MDS I/O
4548  */
4549 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4550                                     uint32_t *bitmap,
4551                                     struct nfs4_threshold *res)
4552 {
4553         __be32 *p;
4554         int status = 0;
4555         uint32_t num;
4556
4557         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4558                 return -EIO;
4559         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4560                 /* Did the server return an unrequested attribute? */
4561                 if (unlikely(res == NULL))
4562                         return -EREMOTEIO;
4563                 p = xdr_inline_decode(xdr, 4);
4564                 if (unlikely(!p))
4565                         goto out_overflow;
4566                 num = be32_to_cpup(p);
4567                 if (num == 0)
4568                         return 0;
4569                 if (num > 1)
4570                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4571                                 "drivers per filesystem not supported\n",
4572                                 __func__);
4573
4574                 status = decode_first_threshold_item4(xdr, res);
4575                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4576         }
4577         return status;
4578 out_overflow:
4579         print_overflow_msg(__func__, xdr);
4580         return -EIO;
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                 goto out_overflow;
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                 goto out_overflow;
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 out_overflow:
4791         print_overflow_msg(__func__, xdr);
4792         return -EIO;
4793 }
4794
4795 /*
4796  * The type of file system exported.
4797  * Note we must ensure that layouttype is set in any non-error case.
4798  */
4799 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4800                                 struct nfs_fsinfo *fsinfo)
4801 {
4802         int status = 0;
4803
4804         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4805         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4806                 return -EIO;
4807         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4808                 status = decode_pnfs_layout_types(xdr, fsinfo);
4809                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4810         }
4811         return status;
4812 }
4813
4814 /*
4815  * The prefered block size for layout directed io
4816  */
4817 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4818                                       uint32_t *res)
4819 {
4820         __be32 *p;
4821
4822         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4823         *res = 0;
4824         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4825                 p = xdr_inline_decode(xdr, 4);
4826                 if (unlikely(!p)) {
4827                         print_overflow_msg(__func__, xdr);
4828                         return -EIO;
4829                 }
4830                 *res = be32_to_cpup(p);
4831                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4832         }
4833         return 0;
4834 }
4835
4836 /*
4837  * The granularity of a CLONE operation.
4838  */
4839 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4840                                      uint32_t *res)
4841 {
4842         __be32 *p;
4843
4844         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4845         *res = 0;
4846         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4847                 p = xdr_inline_decode(xdr, 4);
4848                 if (unlikely(!p)) {
4849                         print_overflow_msg(__func__, xdr);
4850                         return -EIO;
4851                 }
4852                 *res = be32_to_cpup(p);
4853                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4854         }
4855         return 0;
4856 }
4857
4858 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4859 {
4860         unsigned int savep;
4861         uint32_t attrlen, bitmap[3];
4862         int status;
4863
4864         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4865                 goto xdr_error;
4866         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4867                 goto xdr_error;
4868         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4869                 goto xdr_error;
4870
4871         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4872
4873         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4874                 goto xdr_error;
4875         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4876                 goto xdr_error;
4877         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4878                 goto xdr_error;
4879         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4880         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4881                 goto xdr_error;
4882         fsinfo->wtpref = fsinfo->wtmax;
4883
4884         status = -EIO;
4885         if (unlikely(bitmap[0]))
4886                 goto xdr_error;
4887
4888         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4889         if (status != 0)
4890                 goto xdr_error;
4891         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4892         if (status != 0)
4893                 goto xdr_error;
4894
4895         status = -EIO;
4896         if (unlikely(bitmap[1]))
4897                 goto xdr_error;
4898
4899         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4900         if (status)
4901                 goto xdr_error;
4902         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4903         if (status)
4904                 goto xdr_error;
4905
4906         status = verify_attr_len(xdr, savep, attrlen);
4907 xdr_error:
4908         dprintk("%s: xdr returned %d!\n", __func__, -status);
4909         return status;
4910 }
4911
4912 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4913 {
4914         __be32 *p;
4915         uint32_t len;
4916         int status;
4917
4918         /* Zero handle first to allow comparisons */
4919         memset(fh, 0, sizeof(*fh));
4920
4921         status = decode_op_hdr(xdr, OP_GETFH);
4922         if (status)
4923                 return status;
4924
4925         p = xdr_inline_decode(xdr, 4);
4926         if (unlikely(!p))
4927                 goto out_overflow;
4928         len = be32_to_cpup(p);
4929         if (len > NFS4_FHSIZE)
4930                 return -EIO;
4931         fh->size = len;
4932         p = xdr_inline_decode(xdr, len);
4933         if (unlikely(!p))
4934                 goto out_overflow;
4935         memcpy(fh->data, p, len);
4936         return 0;
4937 out_overflow:
4938         print_overflow_msg(__func__, xdr);
4939         return -EIO;
4940 }
4941
4942 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4943 {
4944         int status;
4945
4946         status = decode_op_hdr(xdr, OP_LINK);
4947         if (status)
4948                 return status;
4949         return decode_change_info(xdr, cinfo);
4950 }
4951
4952 /*
4953  * We create the owner, so we know a proper owner.id length is 4.
4954  */
4955 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4956 {
4957         uint64_t offset, length, clientid;
4958         __be32 *p;
4959         uint32_t namelen, type;
4960
4961         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4962         if (unlikely(!p))
4963                 goto out_overflow;
4964         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4965         p = xdr_decode_hyper(p, &length);
4966         type = be32_to_cpup(p++); /* 4 byte read */
4967         if (fl != NULL) { /* manipulate file lock */
4968                 fl->fl_start = (loff_t)offset;
4969                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4970                 if (length == ~(uint64_t)0)
4971                         fl->fl_end = OFFSET_MAX;
4972                 fl->fl_type = F_WRLCK;
4973                 if (type & 1)
4974                         fl->fl_type = F_RDLCK;
4975                 fl->fl_pid = 0;
4976         }
4977         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4978         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4979         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4980         if (likely(p))
4981                 return -NFS4ERR_DENIED;
4982 out_overflow:
4983         print_overflow_msg(__func__, xdr);
4984         return -EIO;
4985 }
4986
4987 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4988 {
4989         int status;
4990
4991         status = decode_op_hdr(xdr, OP_LOCK);
4992         if (status == -EIO)
4993                 goto out;
4994         if (status == 0) {
4995                 status = decode_lock_stateid(xdr, &res->stateid);
4996                 if (unlikely(status))
4997                         goto out;
4998         } else if (status == -NFS4ERR_DENIED)
4999                 status = decode_lock_denied(xdr, NULL);
5000         if (res->open_seqid != NULL)
5001                 nfs_increment_open_seqid(status, res->open_seqid);
5002         nfs_increment_lock_seqid(status, res->lock_seqid);
5003 out:
5004         return status;
5005 }
5006
5007 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5008 {
5009         int status;
5010         status = decode_op_hdr(xdr, OP_LOCKT);
5011         if (status == -NFS4ERR_DENIED)
5012                 return decode_lock_denied(xdr, res->denied);
5013         return status;
5014 }
5015
5016 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5017 {
5018         int status;
5019
5020         status = decode_op_hdr(xdr, OP_LOCKU);
5021         if (status != -EIO)
5022                 nfs_increment_lock_seqid(status, res->seqid);
5023         if (status == 0)
5024                 status = decode_lock_stateid(xdr, &res->stateid);
5025         return status;
5026 }
5027
5028 static int decode_release_lockowner(struct xdr_stream *xdr)
5029 {
5030         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5031 }
5032
5033 static int decode_lookup(struct xdr_stream *xdr)
5034 {
5035         return decode_op_hdr(xdr, OP_LOOKUP);
5036 }
5037
5038 /* This is too sick! */
5039 static int decode_space_limit(struct xdr_stream *xdr,
5040                 unsigned long *pagemod_limit)
5041 {
5042         __be32 *p;
5043         uint32_t limit_type, nblocks, blocksize;
5044         u64 maxsize = 0;
5045
5046         p = xdr_inline_decode(xdr, 12);
5047         if (unlikely(!p))
5048                 goto out_overflow;
5049         limit_type = be32_to_cpup(p++);
5050         switch (limit_type) {
5051         case NFS4_LIMIT_SIZE:
5052                 xdr_decode_hyper(p, &maxsize);
5053                 break;
5054         case NFS4_LIMIT_BLOCKS:
5055                 nblocks = be32_to_cpup(p++);
5056                 blocksize = be32_to_cpup(p);
5057                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5058         }
5059         maxsize >>= PAGE_SHIFT;
5060         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5061         return 0;
5062 out_overflow:
5063         print_overflow_msg(__func__, xdr);
5064         return -EIO;
5065 }
5066
5067 static int decode_rw_delegation(struct xdr_stream *xdr,
5068                 uint32_t delegation_type,
5069                 struct nfs_openres *res)
5070 {
5071         __be32 *p;
5072         int status;
5073
5074         status = decode_delegation_stateid(xdr, &res->delegation);
5075         if (unlikely(status))
5076                 return status;
5077         p = xdr_inline_decode(xdr, 4);
5078         if (unlikely(!p))
5079                 goto out_overflow;
5080         res->do_recall = be32_to_cpup(p);
5081
5082         switch (delegation_type) {
5083         case NFS4_OPEN_DELEGATE_READ:
5084                 res->delegation_type = FMODE_READ;
5085                 break;
5086         case NFS4_OPEN_DELEGATE_WRITE:
5087                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5088                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5089                                 return -EIO;
5090         }
5091         return decode_ace(xdr, NULL, res->server->nfs_client);
5092 out_overflow:
5093         print_overflow_msg(__func__, xdr);
5094         return -EIO;
5095 }
5096
5097 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5098 {
5099         __be32 *p;
5100         uint32_t why_no_delegation;
5101
5102         p = xdr_inline_decode(xdr, 4);
5103         if (unlikely(!p))
5104                 goto out_overflow;
5105         why_no_delegation = be32_to_cpup(p);
5106         switch (why_no_delegation) {
5107                 case WND4_CONTENTION:
5108                 case WND4_RESOURCE:
5109                         xdr_inline_decode(xdr, 4);
5110                         /* Ignore for now */
5111         }
5112         return 0;
5113 out_overflow:
5114         print_overflow_msg(__func__, xdr);
5115         return -EIO;
5116 }
5117
5118 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5119 {
5120         __be32 *p;
5121         uint32_t delegation_type;
5122
5123         p = xdr_inline_decode(xdr, 4);
5124         if (unlikely(!p))
5125                 goto out_overflow;
5126         delegation_type = be32_to_cpup(p);
5127         res->delegation_type = 0;
5128         switch (delegation_type) {
5129         case NFS4_OPEN_DELEGATE_NONE:
5130                 return 0;
5131         case NFS4_OPEN_DELEGATE_READ:
5132         case NFS4_OPEN_DELEGATE_WRITE:
5133                 return decode_rw_delegation(xdr, delegation_type, res);
5134         case NFS4_OPEN_DELEGATE_NONE_EXT:
5135                 return decode_no_delegation(xdr, res);
5136         }
5137         return -EIO;
5138 out_overflow:
5139         print_overflow_msg(__func__, xdr);
5140         return -EIO;
5141 }
5142
5143 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5144 {
5145         __be32 *p;
5146         uint32_t savewords, bmlen, i;
5147         int status;
5148
5149         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5150                 return status;
5151         nfs_increment_open_seqid(status, res->seqid);
5152         if (status)
5153                 return status;
5154         status = decode_open_stateid(xdr, &res->stateid);
5155         if (unlikely(status))
5156                 return status;
5157
5158         decode_change_info(xdr, &res->cinfo);
5159
5160         p = xdr_inline_decode(xdr, 8);
5161         if (unlikely(!p))
5162                 goto out_overflow;
5163         res->rflags = be32_to_cpup(p++);
5164         bmlen = be32_to_cpup(p);
5165         if (bmlen > 10)
5166                 goto xdr_error;
5167
5168         p = xdr_inline_decode(xdr, bmlen << 2);
5169         if (unlikely(!p))
5170                 goto out_overflow;
5171         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5172         for (i = 0; i < savewords; ++i)
5173                 res->attrset[i] = be32_to_cpup(p++);
5174         for (; i < NFS4_BITMAP_SIZE; i++)
5175                 res->attrset[i] = 0;
5176
5177         return decode_delegation(xdr, res);
5178 xdr_error:
5179         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5180         return -EIO;
5181 out_overflow:
5182         print_overflow_msg(__func__, xdr);
5183         return -EIO;
5184 }
5185
5186 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5187 {
5188         int status;
5189
5190         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5191         if (status != -EIO)
5192                 nfs_increment_open_seqid(status, res->seqid);
5193         if (!status)
5194                 status = decode_open_stateid(xdr, &res->stateid);
5195         return status;
5196 }
5197
5198 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5199 {
5200         int status;
5201
5202         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5203         if (status != -EIO)
5204                 nfs_increment_open_seqid(status, res->seqid);
5205         if (!status)
5206                 status = decode_open_stateid(xdr, &res->stateid);
5207         return status;
5208 }
5209
5210 static int decode_putfh(struct xdr_stream *xdr)
5211 {
5212         return decode_op_hdr(xdr, OP_PUTFH);
5213 }
5214
5215 static int decode_putrootfh(struct xdr_stream *xdr)
5216 {
5217         return decode_op_hdr(xdr, OP_PUTROOTFH);
5218 }
5219
5220 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5221                        struct nfs_pgio_res *res)
5222 {
5223         __be32 *p;
5224         uint32_t count, eof, recvd;
5225         int status;
5226
5227         status = decode_op_hdr(xdr, OP_READ);
5228         if (status)
5229                 return status;
5230         p = xdr_inline_decode(xdr, 8);
5231         if (unlikely(!p))
5232                 goto out_overflow;
5233         eof = be32_to_cpup(p++);
5234         count = be32_to_cpup(p);
5235         recvd = xdr_read_pages(xdr, count);
5236         if (count > recvd) {
5237                 dprintk("NFS: server cheating in read reply: "
5238                                 "count %u > recvd %u\n", count, recvd);
5239                 count = recvd;
5240                 eof = 0;
5241         }
5242         res->eof = eof;
5243         res->count = count;
5244         return 0;
5245 out_overflow:
5246         print_overflow_msg(__func__, xdr);
5247         return -EIO;
5248 }
5249
5250 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5251 {
5252         int             status;
5253         __be32          verf[2];
5254
5255         status = decode_op_hdr(xdr, OP_READDIR);
5256         if (!status)
5257                 status = decode_verifier(xdr, readdir->verifier.data);
5258         if (unlikely(status))
5259                 return status;
5260         memcpy(verf, readdir->verifier.data, sizeof(verf));
5261         dprintk("%s: verifier = %08x:%08x\n",
5262                         __func__, verf[0], verf[1]);
5263         return xdr_read_pages(xdr, xdr->buf->page_len);
5264 }
5265
5266 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5267 {
5268         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5269         u32 len, recvd;
5270         __be32 *p;
5271         int status;
5272
5273         status = decode_op_hdr(xdr, OP_READLINK);
5274         if (status)
5275                 return status;
5276
5277         /* Convert length of symlink */
5278         p = xdr_inline_decode(xdr, 4);
5279         if (unlikely(!p))
5280                 goto out_overflow;
5281         len = be32_to_cpup(p);
5282         if (len >= rcvbuf->page_len || len <= 0) {
5283                 dprintk("nfs: server returned giant symlink!\n");
5284                 return -ENAMETOOLONG;
5285         }
5286         recvd = xdr_read_pages(xdr, len);
5287         if (recvd < len) {
5288                 dprintk("NFS: server cheating in readlink reply: "
5289                                 "count %u > recvd %u\n", len, recvd);
5290                 return -EIO;
5291         }
5292         /*
5293          * The XDR encode routine has set things up so that
5294          * the link text will be copied directly into the
5295          * buffer.  We just have to do overflow-checking,
5296          * and and null-terminate the text (the VFS expects
5297          * null-termination).
5298          */
5299         xdr_terminate_string(rcvbuf, len);
5300         return 0;
5301 out_overflow:
5302         print_overflow_msg(__func__, xdr);
5303         return -EIO;
5304 }
5305
5306 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5307 {
5308         int status;
5309
5310         status = decode_op_hdr(xdr, OP_REMOVE);
5311         if (status)
5312                 goto out;
5313         status = decode_change_info(xdr, cinfo);
5314 out:
5315         return status;
5316 }
5317
5318 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5319               struct nfs4_change_info *new_cinfo)
5320 {
5321         int status;
5322
5323         status = decode_op_hdr(xdr, OP_RENAME);
5324         if (status)
5325                 goto out;
5326         if ((status = decode_change_info(xdr, old_cinfo)))
5327                 goto out;
5328         status = decode_change_info(xdr, new_cinfo);
5329 out:
5330         return status;
5331 }
5332
5333 static int decode_renew(struct xdr_stream *xdr)
5334 {
5335         return decode_op_hdr(xdr, OP_RENEW);
5336 }
5337
5338 static int
5339 decode_restorefh(struct xdr_stream *xdr)
5340 {
5341         return decode_op_hdr(xdr, OP_RESTOREFH);
5342 }
5343
5344 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5345                          struct nfs_getaclres *res)
5346 {
5347         unsigned int savep;
5348         uint32_t attrlen,
5349                  bitmap[3] = {0};
5350         int status;
5351         unsigned int pg_offset;
5352
5353         res->acl_len = 0;
5354         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5355                 goto out;
5356
5357         xdr_enter_page(xdr, xdr->buf->page_len);
5358
5359         /* Calculate the offset of the page data */
5360         pg_offset = xdr->buf->head[0].iov_len;
5361
5362         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5363                 goto out;
5364         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5365                 goto out;
5366
5367         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5368                 return -EIO;
5369         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5370
5371                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5372                  * are stored with the acl data to handle the problem of
5373                  * variable length bitmaps.*/
5374                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5375                 res->acl_len = attrlen;
5376
5377                 /* Check for receive buffer overflow */
5378                 if (res->acl_len > (xdr->nwords << 2) ||
5379                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5380                         res->acl_flags |= NFS4_ACL_TRUNC;
5381                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5382                                         attrlen, xdr->nwords << 2);
5383                 }
5384         } else
5385                 status = -EOPNOTSUPP;
5386
5387 out:
5388         return status;
5389 }
5390
5391 static int
5392 decode_savefh(struct xdr_stream *xdr)
5393 {
5394         return decode_op_hdr(xdr, OP_SAVEFH);
5395 }
5396
5397 static int decode_setattr(struct xdr_stream *xdr)
5398 {
5399         __be32 *p;
5400         uint32_t bmlen;
5401         int status;
5402
5403         status = decode_op_hdr(xdr, OP_SETATTR);
5404         if (status)
5405                 return status;
5406         p = xdr_inline_decode(xdr, 4);
5407         if (unlikely(!p))
5408                 goto out_overflow;
5409         bmlen = be32_to_cpup(p);
5410         p = xdr_inline_decode(xdr, bmlen << 2);
5411         if (likely(p))
5412                 return 0;
5413 out_overflow:
5414         print_overflow_msg(__func__, xdr);
5415         return -EIO;
5416 }
5417
5418 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5419 {
5420         __be32 *p;
5421         uint32_t opnum;
5422         int32_t nfserr;
5423
5424         p = xdr_inline_decode(xdr, 8);
5425         if (unlikely(!p))
5426                 goto out_overflow;
5427         opnum = be32_to_cpup(p++);
5428         if (opnum != OP_SETCLIENTID) {
5429                 dprintk("nfs: decode_setclientid: Server returned operation"
5430                         " %d\n", opnum);
5431                 return -EIO;
5432         }
5433         nfserr = be32_to_cpup(p);
5434         if (nfserr == NFS_OK) {
5435                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5436                 if (unlikely(!p))
5437                         goto out_overflow;
5438                 p = xdr_decode_hyper(p, &res->clientid);
5439                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5440         } else if (nfserr == NFSERR_CLID_INUSE) {
5441                 uint32_t len;
5442
5443                 /* skip netid string */
5444                 p = xdr_inline_decode(xdr, 4);
5445                 if (unlikely(!p))
5446                         goto out_overflow;
5447                 len = be32_to_cpup(p);
5448                 p = xdr_inline_decode(xdr, len);
5449                 if (unlikely(!p))
5450                         goto out_overflow;
5451
5452                 /* skip uaddr string */
5453                 p = xdr_inline_decode(xdr, 4);
5454                 if (unlikely(!p))
5455                         goto out_overflow;
5456                 len = be32_to_cpup(p);
5457                 p = xdr_inline_decode(xdr, len);
5458                 if (unlikely(!p))
5459                         goto out_overflow;
5460                 return -NFSERR_CLID_INUSE;
5461         } else
5462                 return nfs4_stat_to_errno(nfserr);
5463
5464         return 0;
5465 out_overflow:
5466         print_overflow_msg(__func__, xdr);
5467         return -EIO;
5468 }
5469
5470 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5471 {
5472         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5473 }
5474
5475 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5476 {
5477         __be32 *p;
5478         int status;
5479
5480         status = decode_op_hdr(xdr, OP_WRITE);
5481         if (status)
5482                 return status;
5483
5484         p = xdr_inline_decode(xdr, 8);
5485         if (unlikely(!p))
5486                 goto out_overflow;
5487         res->count = be32_to_cpup(p++);
5488         res->verf->committed = be32_to_cpup(p++);
5489         return decode_write_verifier(xdr, &res->verf->verifier);
5490 out_overflow:
5491         print_overflow_msg(__func__, xdr);
5492         return -EIO;
5493 }
5494
5495 static int decode_delegreturn(struct xdr_stream *xdr)
5496 {
5497         return decode_op_hdr(xdr, OP_DELEGRETURN);
5498 }
5499
5500 static int decode_secinfo_gss(struct xdr_stream *xdr,
5501                               struct nfs4_secinfo4 *flavor)
5502 {
5503         u32 oid_len;
5504         __be32 *p;
5505
5506         p = xdr_inline_decode(xdr, 4);
5507         if (unlikely(!p))
5508                 goto out_overflow;
5509         oid_len = be32_to_cpup(p);
5510         if (oid_len > GSS_OID_MAX_LEN)
5511                 goto out_err;
5512
5513         p = xdr_inline_decode(xdr, oid_len);
5514         if (unlikely(!p))
5515                 goto out_overflow;
5516         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5517         flavor->flavor_info.oid.len = oid_len;
5518
5519         p = xdr_inline_decode(xdr, 8);
5520         if (unlikely(!p))
5521                 goto out_overflow;
5522         flavor->flavor_info.qop = be32_to_cpup(p++);
5523         flavor->flavor_info.service = be32_to_cpup(p);
5524
5525         return 0;
5526
5527 out_overflow:
5528         print_overflow_msg(__func__, xdr);
5529         return -EIO;
5530 out_err:
5531         return -EINVAL;
5532 }
5533
5534 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5535 {
5536         struct nfs4_secinfo4 *sec_flavor;
5537         unsigned int i, num_flavors;
5538         int status;
5539         __be32 *p;
5540
5541         p = xdr_inline_decode(xdr, 4);
5542         if (unlikely(!p))
5543                 goto out_overflow;
5544
5545         res->flavors->num_flavors = 0;
5546         num_flavors = be32_to_cpup(p);
5547
5548         for (i = 0; i < num_flavors; i++) {
5549                 sec_flavor = &res->flavors->flavors[i];
5550                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5551                         break;
5552
5553                 p = xdr_inline_decode(xdr, 4);
5554                 if (unlikely(!p))
5555                         goto out_overflow;
5556                 sec_flavor->flavor = be32_to_cpup(p);
5557
5558                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5559                         status = decode_secinfo_gss(xdr, sec_flavor);
5560                         if (status)
5561                                 goto out;
5562                 }
5563                 res->flavors->num_flavors++;
5564         }
5565
5566         status = 0;
5567 out:
5568         return status;
5569 out_overflow:
5570         print_overflow_msg(__func__, xdr);
5571         return -EIO;
5572 }
5573
5574 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5575 {
5576         int status = decode_op_hdr(xdr, OP_SECINFO);
5577         if (status)
5578                 return status;
5579         return decode_secinfo_common(xdr, res);
5580 }
5581
5582 #if defined(CONFIG_NFS_V4_1)
5583 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5584 {
5585         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5586         if (status)
5587                 return status;
5588         return decode_secinfo_common(xdr, res);
5589 }
5590
5591 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5592 {
5593         __be32 *p;
5594         uint32_t bitmap_words;
5595         unsigned int i;
5596
5597         p = xdr_inline_decode(xdr, 4);
5598         bitmap_words = be32_to_cpup(p++);
5599         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5600                 return -EIO;
5601         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5602         for (i = 0; i < bitmap_words; i++)
5603                 op_map->u.words[i] = be32_to_cpup(p++);
5604
5605         return 0;
5606 }
5607
5608 static int decode_exchange_id(struct xdr_stream *xdr,
5609                               struct nfs41_exchange_id_res *res)
5610 {
5611         __be32 *p;
5612         uint32_t dummy;
5613         char *dummy_str;
5614         int status;
5615         uint32_t impl_id_count;
5616
5617         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5618         if (status)
5619                 return status;
5620
5621         p = xdr_inline_decode(xdr, 8);
5622         if (unlikely(!p))
5623                 goto out_overflow;
5624         xdr_decode_hyper(p, &res->clientid);
5625         p = xdr_inline_decode(xdr, 12);
5626         if (unlikely(!p))
5627                 goto out_overflow;
5628         res->seqid = be32_to_cpup(p++);
5629         res->flags = be32_to_cpup(p++);
5630
5631         res->state_protect.how = be32_to_cpup(p);
5632         switch (res->state_protect.how) {
5633         case SP4_NONE:
5634                 break;
5635         case SP4_MACH_CRED:
5636                 status = decode_op_map(xdr, &res->state_protect.enforce);
5637                 if (status)
5638                         return status;
5639                 status = decode_op_map(xdr, &res->state_protect.allow);
5640                 if (status)
5641                         return status;
5642                 break;
5643         default:
5644                 WARN_ON_ONCE(1);
5645                 return -EIO;
5646         }
5647
5648         /* server_owner4.so_minor_id */
5649         p = xdr_inline_decode(xdr, 8);
5650         if (unlikely(!p))
5651                 goto out_overflow;
5652         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5653
5654         /* server_owner4.so_major_id */
5655         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5656         if (unlikely(status))
5657                 return status;
5658         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5659                 return -EIO;
5660         memcpy(res->server_owner->major_id, dummy_str, dummy);
5661         res->server_owner->major_id_sz = dummy;
5662
5663         /* server_scope4 */
5664         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5665         if (unlikely(status))
5666                 return status;
5667         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5668                 return -EIO;
5669         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5670         res->server_scope->server_scope_sz = dummy;
5671
5672         /* Implementation Id */
5673         p = xdr_inline_decode(xdr, 4);
5674         if (unlikely(!p))
5675                 goto out_overflow;
5676         impl_id_count = be32_to_cpup(p++);
5677
5678         if (impl_id_count) {
5679                 /* nii_domain */
5680                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5681                 if (unlikely(status))
5682                         return status;
5683                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5684                         return -EIO;
5685                 memcpy(res->impl_id->domain, dummy_str, dummy);
5686
5687                 /* nii_name */
5688                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5689                 if (unlikely(status))
5690                         return status;
5691                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5692                         return -EIO;
5693                 memcpy(res->impl_id->name, dummy_str, dummy);
5694
5695                 /* nii_date */
5696                 p = xdr_inline_decode(xdr, 12);
5697                 if (unlikely(!p))
5698                         goto out_overflow;
5699                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5700                 res->impl_id->date.nseconds = be32_to_cpup(p);
5701
5702                 /* if there's more than one entry, ignore the rest */
5703         }
5704         return 0;
5705 out_overflow:
5706         print_overflow_msg(__func__, xdr);
5707         return -EIO;
5708 }
5709
5710 static int decode_chan_attrs(struct xdr_stream *xdr,
5711                              struct nfs4_channel_attrs *attrs)
5712 {
5713         __be32 *p;
5714         u32 nr_attrs, val;
5715
5716         p = xdr_inline_decode(xdr, 28);
5717         if (unlikely(!p))
5718                 goto out_overflow;
5719         val = be32_to_cpup(p++);        /* headerpadsz */
5720         if (val)
5721                 return -EINVAL;         /* no support for header padding yet */
5722         attrs->max_rqst_sz = be32_to_cpup(p++);
5723         attrs->max_resp_sz = be32_to_cpup(p++);
5724         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5725         attrs->max_ops = be32_to_cpup(p++);
5726         attrs->max_reqs = be32_to_cpup(p++);
5727         nr_attrs = be32_to_cpup(p);
5728         if (unlikely(nr_attrs > 1)) {
5729                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5730                         "count %u\n", __func__, nr_attrs);
5731                 return -EINVAL;
5732         }
5733         if (nr_attrs == 1) {
5734                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5735                 if (unlikely(!p))
5736                         goto out_overflow;
5737         }
5738         return 0;
5739 out_overflow:
5740         print_overflow_msg(__func__, xdr);
5741         return -EIO;
5742 }
5743
5744 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5745 {
5746         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5747 }
5748
5749 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5750                                 struct nfs41_bind_conn_to_session_res *res)
5751 {
5752         __be32 *p;
5753         int status;
5754
5755         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5756         if (!status)
5757                 status = decode_sessionid(xdr, &res->sessionid);
5758         if (unlikely(status))
5759                 return status;
5760
5761         /* dir flags, rdma mode bool */
5762         p = xdr_inline_decode(xdr, 8);
5763         if (unlikely(!p))
5764                 goto out_overflow;
5765
5766         res->dir = be32_to_cpup(p++);
5767         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5768                 return -EIO;
5769         if (be32_to_cpup(p) == 0)
5770                 res->use_conn_in_rdma_mode = false;
5771         else
5772                 res->use_conn_in_rdma_mode = true;
5773
5774         return 0;
5775 out_overflow:
5776         print_overflow_msg(__func__, xdr);
5777         return -EIO;
5778 }
5779
5780 static int decode_create_session(struct xdr_stream *xdr,
5781                                  struct nfs41_create_session_res *res)
5782 {
5783         __be32 *p;
5784         int status;
5785
5786         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5787         if (!status)
5788                 status = decode_sessionid(xdr, &res->sessionid);
5789         if (unlikely(status))
5790                 return status;
5791
5792         /* seqid, flags */
5793         p = xdr_inline_decode(xdr, 8);
5794         if (unlikely(!p))
5795                 goto out_overflow;
5796         res->seqid = be32_to_cpup(p++);
5797         res->flags = be32_to_cpup(p);
5798
5799         /* Channel attributes */
5800         status = decode_chan_attrs(xdr, &res->fc_attrs);
5801         if (!status)
5802                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5803         return status;
5804 out_overflow:
5805         print_overflow_msg(__func__, xdr);
5806         return -EIO;
5807 }
5808
5809 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5810 {
5811         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5812 }
5813
5814 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5815 {
5816         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5817 }
5818
5819 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5820 {
5821         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5822 }
5823 #endif /* CONFIG_NFS_V4_1 */
5824
5825 static int decode_sequence(struct xdr_stream *xdr,
5826                            struct nfs4_sequence_res *res,
5827                            struct rpc_rqst *rqstp)
5828 {
5829 #if defined(CONFIG_NFS_V4_1)
5830         struct nfs4_session *session;
5831         struct nfs4_sessionid id;
5832         u32 dummy;
5833         int status;
5834         __be32 *p;
5835
5836         if (res->sr_slot == NULL)
5837                 return 0;
5838         if (!res->sr_slot->table->session)
5839                 return 0;
5840
5841         status = decode_op_hdr(xdr, OP_SEQUENCE);
5842         if (!status)
5843                 status = decode_sessionid(xdr, &id);
5844         if (unlikely(status))
5845                 goto out_err;
5846
5847         /*
5848          * If the server returns different values for sessionID, slotID or
5849          * sequence number, the server is looney tunes.
5850          */
5851         status = -EREMOTEIO;
5852         session = res->sr_slot->table->session;
5853
5854         if (memcmp(id.data, session->sess_id.data,
5855                    NFS4_MAX_SESSIONID_LEN)) {
5856                 dprintk("%s Invalid session id\n", __func__);
5857                 goto out_err;
5858         }
5859
5860         p = xdr_inline_decode(xdr, 20);
5861         if (unlikely(!p))
5862                 goto out_overflow;
5863
5864         /* seqid */
5865         dummy = be32_to_cpup(p++);
5866         if (dummy != res->sr_slot->seq_nr) {
5867                 dprintk("%s Invalid sequence number\n", __func__);
5868                 goto out_err;
5869         }
5870         /* slot id */
5871         dummy = be32_to_cpup(p++);
5872         if (dummy != res->sr_slot->slot_nr) {
5873                 dprintk("%s Invalid slot id\n", __func__);
5874                 goto out_err;
5875         }
5876         /* highest slot id */
5877         res->sr_highest_slotid = be32_to_cpup(p++);
5878         /* target highest slot id */
5879         res->sr_target_highest_slotid = be32_to_cpup(p++);
5880         /* result flags */
5881         res->sr_status_flags = be32_to_cpup(p);
5882         status = 0;
5883 out_err:
5884         res->sr_status = status;
5885         return status;
5886 out_overflow:
5887         print_overflow_msg(__func__, xdr);
5888         status = -EIO;
5889         goto out_err;
5890 #else  /* CONFIG_NFS_V4_1 */
5891         return 0;
5892 #endif /* CONFIG_NFS_V4_1 */
5893 }
5894
5895 #if defined(CONFIG_NFS_V4_1)
5896 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5897 {
5898         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5899         return decode_stateid(xdr, stateid);
5900 }
5901
5902 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5903                                 struct nfs4_getdeviceinfo_res *res)
5904 {
5905         struct pnfs_device *pdev = res->pdev;
5906         __be32 *p;
5907         uint32_t len, type;
5908         int status;
5909
5910         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5911         if (status) {
5912                 if (status == -ETOOSMALL) {
5913                         p = xdr_inline_decode(xdr, 4);
5914                         if (unlikely(!p))
5915                                 goto out_overflow;
5916                         pdev->mincount = be32_to_cpup(p);
5917                         dprintk("%s: Min count too small. mincnt = %u\n",
5918                                 __func__, pdev->mincount);
5919                 }
5920                 return status;
5921         }
5922
5923         p = xdr_inline_decode(xdr, 8);
5924         if (unlikely(!p))
5925                 goto out_overflow;
5926         type = be32_to_cpup(p++);
5927         if (type != pdev->layout_type) {
5928                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5929                         __func__, pdev->layout_type, type);
5930                 return -EINVAL;
5931         }
5932         /*
5933          * Get the length of the opaque device_addr4. xdr_read_pages places
5934          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5935          * and places the remaining xdr data in xdr_buf->tail
5936          */
5937         pdev->mincount = be32_to_cpup(p);
5938         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5939                 goto out_overflow;
5940
5941         /* Parse notification bitmap, verifying that it is zero. */
5942         p = xdr_inline_decode(xdr, 4);
5943         if (unlikely(!p))
5944                 goto out_overflow;
5945         len = be32_to_cpup(p);
5946         if (len) {
5947                 uint32_t i;
5948
5949                 p = xdr_inline_decode(xdr, 4 * len);
5950                 if (unlikely(!p))
5951                         goto out_overflow;
5952
5953                 res->notification = be32_to_cpup(p++);
5954                 for (i = 1; i < len; i++) {
5955                         if (be32_to_cpup(p++)) {
5956                                 dprintk("%s: unsupported notification\n",
5957                                         __func__);
5958                                 return -EIO;
5959                         }
5960                 }
5961         }
5962         return 0;
5963 out_overflow:
5964         print_overflow_msg(__func__, xdr);
5965         return -EIO;
5966 }
5967
5968 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5969                             struct nfs4_layoutget_res *res)
5970 {
5971         __be32 *p;
5972         int status;
5973         u32 layout_count;
5974         u32 recvd;
5975
5976         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5977         if (status)
5978                 return status;
5979         p = xdr_inline_decode(xdr, 4);
5980         if (unlikely(!p))
5981                 goto out_overflow;
5982         res->return_on_close = be32_to_cpup(p);
5983         decode_layout_stateid(xdr, &res->stateid);
5984         p = xdr_inline_decode(xdr, 4);
5985         if (unlikely(!p))
5986                 goto out_overflow;
5987         layout_count = be32_to_cpup(p);
5988         if (!layout_count) {
5989                 dprintk("%s: server responded with empty layout array\n",
5990                         __func__);
5991                 return -EINVAL;
5992         }
5993
5994         p = xdr_inline_decode(xdr, 28);
5995         if (unlikely(!p))
5996                 goto out_overflow;
5997         p = xdr_decode_hyper(p, &res->range.offset);
5998         p = xdr_decode_hyper(p, &res->range.length);
5999         res->range.iomode = be32_to_cpup(p++);
6000         res->type = be32_to_cpup(p++);
6001         res->layoutp->len = be32_to_cpup(p);
6002
6003         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6004                 __func__,
6005                 (unsigned long)res->range.offset,
6006                 (unsigned long)res->range.length,
6007                 res->range.iomode,
6008                 res->type,
6009                 res->layoutp->len);
6010
6011         recvd = xdr_read_pages(xdr, res->layoutp->len);
6012         if (res->layoutp->len > recvd) {
6013                 dprintk("NFS: server cheating in layoutget reply: "
6014                                 "layout len %u > recvd %u\n",
6015                                 res->layoutp->len, recvd);
6016                 return -EINVAL;
6017         }
6018
6019         if (layout_count > 1) {
6020                 /* We only handle a length one array at the moment.  Any
6021                  * further entries are just ignored.  Note that this means
6022                  * the client may see a response that is less than the
6023                  * minimum it requested.
6024                  */
6025                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6026                         __func__, layout_count);
6027         }
6028
6029         return 0;
6030 out_overflow:
6031         print_overflow_msg(__func__, xdr);
6032         return -EIO;
6033 }
6034
6035 static int decode_layoutreturn(struct xdr_stream *xdr,
6036                                struct nfs4_layoutreturn_res *res)
6037 {
6038         __be32 *p;
6039         int status;
6040
6041         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6042         if (status)
6043                 return status;
6044         p = xdr_inline_decode(xdr, 4);
6045         if (unlikely(!p))
6046                 goto out_overflow;
6047         res->lrs_present = be32_to_cpup(p);
6048         if (res->lrs_present)
6049                 status = decode_layout_stateid(xdr, &res->stateid);
6050         return status;
6051 out_overflow:
6052         print_overflow_msg(__func__, xdr);
6053         return -EIO;
6054 }
6055
6056 static int decode_layoutcommit(struct xdr_stream *xdr,
6057                                struct rpc_rqst *req,
6058                                struct nfs4_layoutcommit_res *res)
6059 {
6060         __be32 *p;
6061         __u32 sizechanged;
6062         int status;
6063
6064         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6065         res->status = status;
6066         if (status)
6067                 return status;
6068
6069         p = xdr_inline_decode(xdr, 4);
6070         if (unlikely(!p))
6071                 goto out_overflow;
6072         sizechanged = be32_to_cpup(p);
6073
6074         if (sizechanged) {
6075                 /* throw away new size */
6076                 p = xdr_inline_decode(xdr, 8);
6077                 if (unlikely(!p))
6078                         goto out_overflow;
6079         }
6080         return 0;
6081 out_overflow:
6082         print_overflow_msg(__func__, xdr);
6083         return -EIO;
6084 }
6085
6086 static int decode_test_stateid(struct xdr_stream *xdr,
6087                                struct nfs41_test_stateid_res *res)
6088 {
6089         __be32 *p;
6090         int status;
6091         int num_res;
6092
6093         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6094         if (status)
6095                 return status;
6096
6097         p = xdr_inline_decode(xdr, 4);
6098         if (unlikely(!p))
6099                 goto out_overflow;
6100         num_res = be32_to_cpup(p++);
6101         if (num_res != 1)
6102                 goto out;
6103
6104         p = xdr_inline_decode(xdr, 4);
6105         if (unlikely(!p))
6106                 goto out_overflow;
6107         res->status = be32_to_cpup(p++);
6108
6109         return status;
6110 out_overflow:
6111         print_overflow_msg(__func__, xdr);
6112 out:
6113         return -EIO;
6114 }
6115
6116 static int decode_free_stateid(struct xdr_stream *xdr,
6117                                struct nfs41_free_stateid_res *res)
6118 {
6119         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6120         return res->status;
6121 }
6122 #else
6123 static inline
6124 int decode_layoutreturn(struct xdr_stream *xdr,
6125                                struct nfs4_layoutreturn_res *res)
6126 {
6127         return 0;
6128 }
6129 #endif /* CONFIG_NFS_V4_1 */
6130
6131 /*
6132  * END OF "GENERIC" DECODE ROUTINES.
6133  */
6134
6135 /*
6136  * Decode OPEN_DOWNGRADE response
6137  */
6138 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6139                                        struct xdr_stream *xdr,
6140                                        struct nfs_closeres *res)
6141 {
6142         struct compound_hdr hdr;
6143         int status;
6144
6145         status = decode_compound_hdr(xdr, &hdr);
6146         if (status)
6147                 goto out;
6148         status = decode_sequence(xdr, &res->seq_res, rqstp);
6149         if (status)
6150                 goto out;
6151         status = decode_putfh(xdr);
6152         if (status)
6153                 goto out;
6154         status = decode_open_downgrade(xdr, res);
6155 out:
6156         return status;
6157 }
6158
6159 /*
6160  * Decode ACCESS response
6161  */
6162 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6163                                struct nfs4_accessres *res)
6164 {
6165         struct compound_hdr hdr;
6166         int status;
6167
6168         status = decode_compound_hdr(xdr, &hdr);
6169         if (status)
6170                 goto out;
6171         status = decode_sequence(xdr, &res->seq_res, rqstp);
6172         if (status)
6173                 goto out;
6174         status = decode_putfh(xdr);
6175         if (status != 0)
6176                 goto out;
6177         status = decode_access(xdr, &res->supported, &res->access);
6178         if (status != 0)
6179                 goto out;
6180         decode_getfattr(xdr, res->fattr, res->server);
6181 out:
6182         return status;
6183 }
6184
6185 /*
6186  * Decode LOOKUP response
6187  */
6188 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6189                                struct nfs4_lookup_res *res)
6190 {
6191         struct compound_hdr hdr;
6192         int status;
6193
6194         status = decode_compound_hdr(xdr, &hdr);
6195         if (status)
6196                 goto out;
6197         status = decode_sequence(xdr, &res->seq_res, rqstp);
6198         if (status)
6199                 goto out;
6200         status = decode_putfh(xdr);
6201         if (status)
6202                 goto out;
6203         status = decode_lookup(xdr);
6204         if (status)
6205                 goto out;
6206         status = decode_getfh(xdr, res->fh);
6207         if (status)
6208                 goto out;
6209         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6210 out:
6211         return status;
6212 }
6213
6214 /*
6215  * Decode LOOKUP_ROOT response
6216  */
6217 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6218                                     struct xdr_stream *xdr,
6219                                     struct nfs4_lookup_res *res)
6220 {
6221         struct compound_hdr hdr;
6222         int status;
6223
6224         status = decode_compound_hdr(xdr, &hdr);
6225         if (status)
6226                 goto out;
6227         status = decode_sequence(xdr, &res->seq_res, rqstp);
6228         if (status)
6229                 goto out;
6230         status = decode_putrootfh(xdr);
6231         if (status)
6232                 goto out;
6233         status = decode_getfh(xdr, res->fh);
6234         if (status == 0)
6235                 status = decode_getfattr_label(xdr, res->fattr,
6236                                                 res->label, res->server);
6237 out:
6238         return status;
6239 }
6240
6241 /*
6242  * Decode REMOVE response
6243  */
6244 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6245                                struct nfs_removeres *res)
6246 {
6247         struct compound_hdr hdr;
6248         int status;
6249
6250         status = decode_compound_hdr(xdr, &hdr);
6251         if (status)
6252                 goto out;
6253         status = decode_sequence(xdr, &res->seq_res, rqstp);
6254         if (status)
6255                 goto out;
6256         status = decode_putfh(xdr);
6257         if (status)
6258                 goto out;
6259         status = decode_remove(xdr, &res->cinfo);
6260 out:
6261         return status;
6262 }
6263
6264 /*
6265  * Decode RENAME response
6266  */
6267 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268                                struct nfs_renameres *res)
6269 {
6270         struct compound_hdr hdr;
6271         int status;
6272
6273         status = decode_compound_hdr(xdr, &hdr);
6274         if (status)
6275                 goto out;
6276         status = decode_sequence(xdr, &res->seq_res, rqstp);
6277         if (status)
6278                 goto out;
6279         status = decode_putfh(xdr);
6280         if (status)
6281                 goto out;
6282         status = decode_savefh(xdr);
6283         if (status)
6284                 goto out;
6285         status = decode_putfh(xdr);
6286         if (status)
6287                 goto out;
6288         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6289 out:
6290         return status;
6291 }
6292
6293 /*
6294  * Decode LINK response
6295  */
6296 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6297                              struct nfs4_link_res *res)
6298 {
6299         struct compound_hdr hdr;
6300         int status;
6301
6302         status = decode_compound_hdr(xdr, &hdr);
6303         if (status)
6304                 goto out;
6305         status = decode_sequence(xdr, &res->seq_res, rqstp);
6306         if (status)
6307                 goto out;
6308         status = decode_putfh(xdr);
6309         if (status)
6310                 goto out;
6311         status = decode_savefh(xdr);
6312         if (status)
6313                 goto out;
6314         status = decode_putfh(xdr);
6315         if (status)
6316                 goto out;
6317         status = decode_link(xdr, &res->cinfo);
6318         if (status)
6319                 goto out;
6320         /*
6321          * Note order: OP_LINK leaves the directory as the current
6322          *             filehandle.
6323          */
6324         status = decode_restorefh(xdr);
6325         if (status)
6326                 goto out;
6327         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6328 out:
6329         return status;
6330 }
6331
6332 /*
6333  * Decode CREATE response
6334  */
6335 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6336                                struct nfs4_create_res *res)
6337 {
6338         struct compound_hdr hdr;
6339         int status;
6340
6341         status = decode_compound_hdr(xdr, &hdr);
6342         if (status)
6343                 goto out;
6344         status = decode_sequence(xdr, &res->seq_res, rqstp);
6345         if (status)
6346                 goto out;
6347         status = decode_putfh(xdr);
6348         if (status)
6349                 goto out;
6350         status = decode_create(xdr, &res->dir_cinfo);
6351         if (status)
6352                 goto out;
6353         status = decode_getfh(xdr, res->fh);
6354         if (status)
6355                 goto out;
6356         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6357 out:
6358         return status;
6359 }
6360
6361 /*
6362  * Decode SYMLINK response
6363  */
6364 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6365                                 struct nfs4_create_res *res)
6366 {
6367         return nfs4_xdr_dec_create(rqstp, xdr, res);
6368 }
6369
6370 /*
6371  * Decode GETATTR response
6372  */
6373 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6374                                 struct nfs4_getattr_res *res)
6375 {
6376         struct compound_hdr hdr;
6377         int status;
6378
6379         status = decode_compound_hdr(xdr, &hdr);
6380         if (status)
6381                 goto out;
6382         status = decode_sequence(xdr, &res->seq_res, rqstp);
6383         if (status)
6384                 goto out;
6385         status = decode_putfh(xdr);
6386         if (status)
6387                 goto out;
6388         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6389 out:
6390         return status;
6391 }
6392
6393 /*
6394  * Encode an SETACL request
6395  */
6396 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6397                                 struct nfs_setaclargs *args)
6398 {
6399         struct compound_hdr hdr = {
6400                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6401         };
6402
6403         encode_compound_hdr(xdr, req, &hdr);
6404         encode_sequence(xdr, &args->seq_args, &hdr);
6405         encode_putfh(xdr, args->fh, &hdr);
6406         encode_setacl(xdr, args, &hdr);
6407         encode_nops(&hdr);
6408 }
6409
6410 /*
6411  * Decode SETACL response
6412  */
6413 static int
6414 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6415                     struct nfs_setaclres *res)
6416 {
6417         struct compound_hdr hdr;
6418         int status;
6419
6420         status = decode_compound_hdr(xdr, &hdr);
6421         if (status)
6422                 goto out;
6423         status = decode_sequence(xdr, &res->seq_res, rqstp);
6424         if (status)
6425                 goto out;
6426         status = decode_putfh(xdr);
6427         if (status)
6428                 goto out;
6429         status = decode_setattr(xdr);
6430 out:
6431         return status;
6432 }
6433
6434 /*
6435  * Decode GETACL response
6436  */
6437 static int
6438 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6439                     struct nfs_getaclres *res)
6440 {
6441         struct compound_hdr hdr;
6442         int status;
6443
6444         if (res->acl_scratch != NULL) {
6445                 void *p = page_address(res->acl_scratch);
6446                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6447         }
6448         status = decode_compound_hdr(xdr, &hdr);
6449         if (status)
6450                 goto out;
6451         status = decode_sequence(xdr, &res->seq_res, rqstp);
6452         if (status)
6453                 goto out;
6454         status = decode_putfh(xdr);
6455         if (status)
6456                 goto out;
6457         status = decode_getacl(xdr, rqstp, res);
6458
6459 out:
6460         return status;
6461 }
6462
6463 /*
6464  * Decode CLOSE response
6465  */
6466 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6467                               struct nfs_closeres *res)
6468 {
6469         struct compound_hdr hdr;
6470         int status;
6471
6472         status = decode_compound_hdr(xdr, &hdr);
6473         if (status)
6474                 goto out;
6475         status = decode_sequence(xdr, &res->seq_res, rqstp);
6476         if (status)
6477                 goto out;
6478         status = decode_putfh(xdr);
6479         if (status)
6480                 goto out;
6481         if (res->lr_res) {
6482                 status = decode_layoutreturn(xdr, res->lr_res);
6483                 res->lr_ret = status;
6484                 if (status)
6485                         goto out;
6486         }
6487         status = decode_close(xdr, res);
6488         if (status != 0)
6489                 goto out;
6490         /*
6491          * Note: Server may do delete on close for this file
6492          *      in which case the getattr call will fail with
6493          *      an ESTALE error. Shouldn't be a problem,
6494          *      though, since fattr->valid will remain unset.
6495          */
6496         decode_getfattr(xdr, res->fattr, res->server);
6497 out:
6498         return status;
6499 }
6500
6501 /*
6502  * Decode OPEN response
6503  */
6504 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6505                              struct nfs_openres *res)
6506 {
6507         struct compound_hdr hdr;
6508         int status;
6509
6510         status = decode_compound_hdr(xdr, &hdr);
6511         if (status)
6512                 goto out;
6513         status = decode_sequence(xdr, &res->seq_res, rqstp);
6514         if (status)
6515                 goto out;
6516         status = decode_putfh(xdr);
6517         if (status)
6518                 goto out;
6519         status = decode_open(xdr, res);
6520         if (status)
6521                 goto out;
6522         status = decode_getfh(xdr, &res->fh);
6523         if (status)
6524                 goto out;
6525         if (res->access_request)
6526                 decode_access(xdr, &res->access_supported, &res->access_result);
6527         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6528 out:
6529         return status;
6530 }
6531
6532 /*
6533  * Decode OPEN_CONFIRM response
6534  */
6535 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6536                                      struct xdr_stream *xdr,
6537                                      struct nfs_open_confirmres *res)
6538 {
6539         struct compound_hdr hdr;
6540         int status;
6541
6542         status = decode_compound_hdr(xdr, &hdr);
6543         if (status)
6544                 goto out;
6545         status = decode_putfh(xdr);
6546         if (status)
6547                 goto out;
6548         status = decode_open_confirm(xdr, res);
6549 out:
6550         return status;
6551 }
6552
6553 /*
6554  * Decode OPEN response
6555  */
6556 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6557                                     struct xdr_stream *xdr,
6558                                     struct nfs_openres *res)
6559 {
6560         struct compound_hdr hdr;
6561         int status;
6562
6563         status = decode_compound_hdr(xdr, &hdr);
6564         if (status)
6565                 goto out;
6566         status = decode_sequence(xdr, &res->seq_res, rqstp);
6567         if (status)
6568                 goto out;
6569         status = decode_putfh(xdr);
6570         if (status)
6571                 goto out;
6572         status = decode_open(xdr, res);
6573         if (status)
6574                 goto out;
6575         if (res->access_request)
6576                 decode_access(xdr, &res->access_supported, &res->access_result);
6577         decode_getfattr(xdr, res->f_attr, res->server);
6578 out:
6579         return status;
6580 }
6581
6582 /*
6583  * Decode SETATTR response
6584  */
6585 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6586                                 struct xdr_stream *xdr,
6587                                 struct nfs_setattrres *res)
6588 {
6589         struct compound_hdr hdr;
6590         int status;
6591
6592         status = decode_compound_hdr(xdr, &hdr);
6593         if (status)
6594                 goto out;
6595         status = decode_sequence(xdr, &res->seq_res, rqstp);
6596         if (status)
6597                 goto out;
6598         status = decode_putfh(xdr);
6599         if (status)
6600                 goto out;
6601         status = decode_setattr(xdr);
6602         if (status)
6603                 goto out;
6604         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6605 out:
6606         return status;
6607 }
6608
6609 /*
6610  * Decode LOCK response
6611  */
6612 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6613                              struct nfs_lock_res *res)
6614 {
6615         struct compound_hdr hdr;
6616         int status;
6617
6618         status = decode_compound_hdr(xdr, &hdr);
6619         if (status)
6620                 goto out;
6621         status = decode_sequence(xdr, &res->seq_res, rqstp);
6622         if (status)
6623                 goto out;
6624         status = decode_putfh(xdr);
6625         if (status)
6626                 goto out;
6627         status = decode_lock(xdr, res);
6628 out:
6629         return status;
6630 }
6631
6632 /*
6633  * Decode LOCKT response
6634  */
6635 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6636                               struct nfs_lockt_res *res)
6637 {
6638         struct compound_hdr hdr;
6639         int status;
6640
6641         status = decode_compound_hdr(xdr, &hdr);
6642         if (status)
6643                 goto out;
6644         status = decode_sequence(xdr, &res->seq_res, rqstp);
6645         if (status)
6646                 goto out;
6647         status = decode_putfh(xdr);
6648         if (status)
6649                 goto out;
6650         status = decode_lockt(xdr, res);
6651 out:
6652         return status;
6653 }
6654
6655 /*
6656  * Decode LOCKU response
6657  */
6658 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6659                               struct nfs_locku_res *res)
6660 {
6661         struct compound_hdr hdr;
6662         int status;
6663
6664         status = decode_compound_hdr(xdr, &hdr);
6665         if (status)
6666                 goto out;
6667         status = decode_sequence(xdr, &res->seq_res, rqstp);
6668         if (status)
6669                 goto out;
6670         status = decode_putfh(xdr);
6671         if (status)
6672                 goto out;
6673         status = decode_locku(xdr, res);
6674 out:
6675         return status;
6676 }
6677
6678 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6679                                           struct xdr_stream *xdr, void *dummy)
6680 {
6681         struct compound_hdr hdr;
6682         int status;
6683
6684         status = decode_compound_hdr(xdr, &hdr);
6685         if (!status)
6686                 status = decode_release_lockowner(xdr);
6687         return status;
6688 }
6689
6690 /*
6691  * Decode READLINK response
6692  */
6693 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6694                                  struct xdr_stream *xdr,
6695                                  struct nfs4_readlink_res *res)
6696 {
6697         struct compound_hdr hdr;
6698         int status;
6699
6700         status = decode_compound_hdr(xdr, &hdr);
6701         if (status)
6702                 goto out;
6703         status = decode_sequence(xdr, &res->seq_res, rqstp);
6704         if (status)
6705                 goto out;
6706         status = decode_putfh(xdr);
6707         if (status)
6708                 goto out;
6709         status = decode_readlink(xdr, rqstp);
6710 out:
6711         return status;
6712 }
6713
6714 /*
6715  * Decode READDIR response
6716  */
6717 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6718                                 struct nfs4_readdir_res *res)
6719 {
6720         struct compound_hdr hdr;
6721         int status;
6722
6723         status = decode_compound_hdr(xdr, &hdr);
6724         if (status)
6725                 goto out;
6726         status = decode_sequence(xdr, &res->seq_res, rqstp);
6727         if (status)
6728                 goto out;
6729         status = decode_putfh(xdr);
6730         if (status)
6731                 goto out;
6732         status = decode_readdir(xdr, rqstp, res);
6733 out:
6734         return status;
6735 }
6736
6737 /*
6738  * Decode Read response
6739  */
6740 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6741                              struct nfs_pgio_res *res)
6742 {
6743         struct compound_hdr hdr;
6744         int status;
6745
6746         status = decode_compound_hdr(xdr, &hdr);
6747         res->op_status = hdr.status;
6748         if (status)
6749                 goto out;
6750         status = decode_sequence(xdr, &res->seq_res, rqstp);
6751         if (status)
6752                 goto out;
6753         status = decode_putfh(xdr);
6754         if (status)
6755                 goto out;
6756         status = decode_read(xdr, rqstp, res);
6757         if (!status)
6758                 status = res->count;
6759 out:
6760         return status;
6761 }
6762
6763 /*
6764  * Decode WRITE response
6765  */
6766 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6767                               struct nfs_pgio_res *res)
6768 {
6769         struct compound_hdr hdr;
6770         int status;
6771
6772         status = decode_compound_hdr(xdr, &hdr);
6773         res->op_status = hdr.status;
6774         if (status)
6775                 goto out;
6776         status = decode_sequence(xdr, &res->seq_res, rqstp);
6777         if (status)
6778                 goto out;
6779         status = decode_putfh(xdr);
6780         if (status)
6781                 goto out;
6782         status = decode_write(xdr, res);
6783         if (status)
6784                 goto out;
6785         if (res->fattr)
6786                 decode_getfattr(xdr, res->fattr, res->server);
6787         if (!status)
6788                 status = res->count;
6789 out:
6790         return status;
6791 }
6792
6793 /*
6794  * Decode COMMIT response
6795  */
6796 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6797                                struct nfs_commitres *res)
6798 {
6799         struct compound_hdr hdr;
6800         int status;
6801
6802         status = decode_compound_hdr(xdr, &hdr);
6803         res->op_status = hdr.status;
6804         if (status)
6805                 goto out;
6806         status = decode_sequence(xdr, &res->seq_res, rqstp);
6807         if (status)
6808                 goto out;
6809         status = decode_putfh(xdr);
6810         if (status)
6811                 goto out;
6812         status = decode_commit(xdr, res);
6813 out:
6814         return status;
6815 }
6816
6817 /*
6818  * Decode FSINFO response
6819  */
6820 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6821                                struct nfs4_fsinfo_res *res)
6822 {
6823         struct compound_hdr hdr;
6824         int status;
6825
6826         status = decode_compound_hdr(xdr, &hdr);
6827         if (!status)
6828                 status = decode_sequence(xdr, &res->seq_res, req);
6829         if (!status)
6830                 status = decode_putfh(xdr);
6831         if (!status)
6832                 status = decode_fsinfo(xdr, res->fsinfo);
6833         return status;
6834 }
6835
6836 /*
6837  * Decode PATHCONF response
6838  */
6839 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6840                                  struct nfs4_pathconf_res *res)
6841 {
6842         struct compound_hdr hdr;
6843         int status;
6844
6845         status = decode_compound_hdr(xdr, &hdr);
6846         if (!status)
6847                 status = decode_sequence(xdr, &res->seq_res, req);
6848         if (!status)
6849                 status = decode_putfh(xdr);
6850         if (!status)
6851                 status = decode_pathconf(xdr, res->pathconf);
6852         return status;
6853 }
6854
6855 /*
6856  * Decode STATFS response
6857  */
6858 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6859                                struct nfs4_statfs_res *res)
6860 {
6861         struct compound_hdr hdr;
6862         int status;
6863
6864         status = decode_compound_hdr(xdr, &hdr);
6865         if (!status)
6866                 status = decode_sequence(xdr, &res->seq_res, req);
6867         if (!status)
6868                 status = decode_putfh(xdr);
6869         if (!status)
6870                 status = decode_statfs(xdr, res->fsstat);
6871         return status;
6872 }
6873
6874 /*
6875  * Decode GETATTR_BITMAP response
6876  */
6877 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6878                                     struct xdr_stream *xdr,
6879                                     struct nfs4_server_caps_res *res)
6880 {
6881         struct compound_hdr hdr;
6882         int status;
6883
6884         status = decode_compound_hdr(xdr, &hdr);
6885         if (status)
6886                 goto out;
6887         status = decode_sequence(xdr, &res->seq_res, req);
6888         if (status)
6889                 goto out;
6890         status = decode_putfh(xdr);
6891         if (status)
6892                 goto out;
6893         status = decode_server_caps(xdr, res);
6894 out:
6895         return status;
6896 }
6897
6898 /*
6899  * Decode RENEW response
6900  */
6901 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6902                               void *__unused)
6903 {
6904         struct compound_hdr hdr;
6905         int status;
6906
6907         status = decode_compound_hdr(xdr, &hdr);
6908         if (!status)
6909                 status = decode_renew(xdr);
6910         return status;
6911 }
6912
6913 /*
6914  * Decode SETCLIENTID response
6915  */
6916 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6917                                     struct xdr_stream *xdr,
6918                                     struct nfs4_setclientid_res *res)
6919 {
6920         struct compound_hdr hdr;
6921         int status;
6922
6923         status = decode_compound_hdr(xdr, &hdr);
6924         if (!status)
6925                 status = decode_setclientid(xdr, res);
6926         return status;
6927 }
6928
6929 /*
6930  * Decode SETCLIENTID_CONFIRM response
6931  */
6932 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6933                                             struct xdr_stream *xdr)
6934 {
6935         struct compound_hdr hdr;
6936         int status;
6937
6938         status = decode_compound_hdr(xdr, &hdr);
6939         if (!status)
6940                 status = decode_setclientid_confirm(xdr);
6941         return status;
6942 }
6943
6944 /*
6945  * Decode DELEGRETURN response
6946  */
6947 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6948                                     struct xdr_stream *xdr,
6949                                     struct nfs4_delegreturnres *res)
6950 {
6951         struct compound_hdr hdr;
6952         int status;
6953
6954         status = decode_compound_hdr(xdr, &hdr);
6955         if (status)
6956                 goto out;
6957         status = decode_sequence(xdr, &res->seq_res, rqstp);
6958         if (status)
6959                 goto out;
6960         status = decode_putfh(xdr);
6961         if (status != 0)
6962                 goto out;
6963         if (res->lr_res) {
6964                 status = decode_layoutreturn(xdr, res->lr_res);
6965                 res->lr_ret = status;
6966                 if (status)
6967                         goto out;
6968         }
6969         status = decode_getfattr(xdr, res->fattr, res->server);
6970         if (status != 0)
6971                 goto out;
6972         status = decode_delegreturn(xdr);
6973 out:
6974         return status;
6975 }
6976
6977 /*
6978  * Decode FS_LOCATIONS response
6979  */
6980 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6981                                      struct xdr_stream *xdr,
6982                                      struct nfs4_fs_locations_res *res)
6983 {
6984         struct compound_hdr hdr;
6985         int status;
6986
6987         status = decode_compound_hdr(xdr, &hdr);
6988         if (status)
6989                 goto out;
6990         status = decode_sequence(xdr, &res->seq_res, req);
6991         if (status)
6992                 goto out;
6993         status = decode_putfh(xdr);
6994         if (status)
6995                 goto out;
6996         if (res->migration) {
6997                 xdr_enter_page(xdr, PAGE_SIZE);
6998                 status = decode_getfattr_generic(xdr,
6999                                         &res->fs_locations->fattr,
7000                                          NULL, res->fs_locations,
7001                                          NULL, res->fs_locations->server);
7002                 if (status)
7003                         goto out;
7004                 if (res->renew)
7005                         status = decode_renew(xdr);
7006         } else {
7007                 status = decode_lookup(xdr);
7008                 if (status)
7009                         goto out;
7010                 xdr_enter_page(xdr, PAGE_SIZE);
7011                 status = decode_getfattr_generic(xdr,
7012                                         &res->fs_locations->fattr,
7013                                          NULL, res->fs_locations,
7014                                          NULL, res->fs_locations->server);
7015         }
7016 out:
7017         return status;
7018 }
7019
7020 /*
7021  * Decode SECINFO response
7022  */
7023 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7024                                 struct xdr_stream *xdr,
7025                                 struct nfs4_secinfo_res *res)
7026 {
7027         struct compound_hdr hdr;
7028         int status;
7029
7030         status = decode_compound_hdr(xdr, &hdr);
7031         if (status)
7032                 goto out;
7033         status = decode_sequence(xdr, &res->seq_res, rqstp);
7034         if (status)
7035                 goto out;
7036         status = decode_putfh(xdr);
7037         if (status)
7038                 goto out;
7039         status = decode_secinfo(xdr, res);
7040 out:
7041         return status;
7042 }
7043
7044 /*
7045  * Decode FSID_PRESENT response
7046  */
7047 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7048                                      struct xdr_stream *xdr,
7049                                      struct nfs4_fsid_present_res *res)
7050 {
7051         struct compound_hdr hdr;
7052         int status;
7053
7054         status = decode_compound_hdr(xdr, &hdr);
7055         if (status)
7056                 goto out;
7057         status = decode_sequence(xdr, &res->seq_res, rqstp);
7058         if (status)
7059                 goto out;
7060         status = decode_putfh(xdr);
7061         if (status)
7062                 goto out;
7063         status = decode_getfh(xdr, res->fh);
7064         if (status)
7065                 goto out;
7066         if (res->renew)
7067                 status = decode_renew(xdr);
7068 out:
7069         return status;
7070 }
7071
7072 #if defined(CONFIG_NFS_V4_1)
7073 /*
7074  * Decode BIND_CONN_TO_SESSION response
7075  */
7076 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7077                                         struct xdr_stream *xdr,
7078                                         void *res)
7079 {
7080         struct compound_hdr hdr;
7081         int status;
7082
7083         status = decode_compound_hdr(xdr, &hdr);
7084         if (!status)
7085                 status = decode_bind_conn_to_session(xdr, res);
7086         return status;
7087 }
7088
7089 /*
7090  * Decode EXCHANGE_ID response
7091  */
7092 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7093                                     struct xdr_stream *xdr,
7094                                     void *res)
7095 {
7096         struct compound_hdr hdr;
7097         int status;
7098
7099         status = decode_compound_hdr(xdr, &hdr);
7100         if (!status)
7101                 status = decode_exchange_id(xdr, res);
7102         return status;
7103 }
7104
7105 /*
7106  * Decode CREATE_SESSION response
7107  */
7108 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7109                                        struct xdr_stream *xdr,
7110                                        struct nfs41_create_session_res *res)
7111 {
7112         struct compound_hdr hdr;
7113         int status;
7114
7115         status = decode_compound_hdr(xdr, &hdr);
7116         if (!status)
7117                 status = decode_create_session(xdr, res);
7118         return status;
7119 }
7120
7121 /*
7122  * Decode DESTROY_SESSION response
7123  */
7124 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7125                                         struct xdr_stream *xdr,
7126                                         void *res)
7127 {
7128         struct compound_hdr hdr;
7129         int status;
7130
7131         status = decode_compound_hdr(xdr, &hdr);
7132         if (!status)
7133                 status = decode_destroy_session(xdr, res);
7134         return status;
7135 }
7136
7137 /*
7138  * Decode DESTROY_CLIENTID response
7139  */
7140 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7141                                         struct xdr_stream *xdr,
7142                                         void *res)
7143 {
7144         struct compound_hdr hdr;
7145         int status;
7146
7147         status = decode_compound_hdr(xdr, &hdr);
7148         if (!status)
7149                 status = decode_destroy_clientid(xdr, res);
7150         return status;
7151 }
7152
7153 /*
7154  * Decode SEQUENCE response
7155  */
7156 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7157                                  struct xdr_stream *xdr,
7158                                  struct nfs4_sequence_res *res)
7159 {
7160         struct compound_hdr hdr;
7161         int status;
7162
7163         status = decode_compound_hdr(xdr, &hdr);
7164         if (!status)
7165                 status = decode_sequence(xdr, res, rqstp);
7166         return status;
7167 }
7168
7169 /*
7170  * Decode GET_LEASE_TIME response
7171  */
7172 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7173                                        struct xdr_stream *xdr,
7174                                        struct nfs4_get_lease_time_res *res)
7175 {
7176         struct compound_hdr hdr;
7177         int status;
7178
7179         status = decode_compound_hdr(xdr, &hdr);
7180         if (!status)
7181                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7182         if (!status)
7183                 status = decode_putrootfh(xdr);
7184         if (!status)
7185                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7186         return status;
7187 }
7188
7189 /*
7190  * Decode RECLAIM_COMPLETE response
7191  */
7192 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7193                                          struct xdr_stream *xdr,
7194                                          struct nfs41_reclaim_complete_res *res)
7195 {
7196         struct compound_hdr hdr;
7197         int status;
7198
7199         status = decode_compound_hdr(xdr, &hdr);
7200         if (!status)
7201                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7202         if (!status)
7203                 status = decode_reclaim_complete(xdr, NULL);
7204         return status;
7205 }
7206
7207 /*
7208  * Decode GETDEVINFO response
7209  */
7210 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7211                                       struct xdr_stream *xdr,
7212                                       struct nfs4_getdeviceinfo_res *res)
7213 {
7214         struct compound_hdr hdr;
7215         int status;
7216
7217         status = decode_compound_hdr(xdr, &hdr);
7218         if (status != 0)
7219                 goto out;
7220         status = decode_sequence(xdr, &res->seq_res, rqstp);
7221         if (status != 0)
7222                 goto out;
7223         status = decode_getdeviceinfo(xdr, res);
7224 out:
7225         return status;
7226 }
7227
7228 /*
7229  * Decode LAYOUTGET response
7230  */
7231 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7232                                   struct xdr_stream *xdr,
7233                                   struct nfs4_layoutget_res *res)
7234 {
7235         struct compound_hdr hdr;
7236         int status;
7237
7238         status = decode_compound_hdr(xdr, &hdr);
7239         if (status)
7240                 goto out;
7241         status = decode_sequence(xdr, &res->seq_res, rqstp);
7242         if (status)
7243                 goto out;
7244         status = decode_putfh(xdr);
7245         if (status)
7246                 goto out;
7247         status = decode_layoutget(xdr, rqstp, res);
7248 out:
7249         return status;
7250 }
7251
7252 /*
7253  * Decode LAYOUTRETURN response
7254  */
7255 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7256                                      struct xdr_stream *xdr,
7257                                      struct nfs4_layoutreturn_res *res)
7258 {
7259         struct compound_hdr hdr;
7260         int status;
7261
7262         status = decode_compound_hdr(xdr, &hdr);
7263         if (status)
7264                 goto out;
7265         status = decode_sequence(xdr, &res->seq_res, rqstp);
7266         if (status)
7267                 goto out;
7268         status = decode_putfh(xdr);
7269         if (status)
7270                 goto out;
7271         status = decode_layoutreturn(xdr, res);
7272 out:
7273         return status;
7274 }
7275
7276 /*
7277  * Decode LAYOUTCOMMIT response
7278  */
7279 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7280                                      struct xdr_stream *xdr,
7281                                      struct nfs4_layoutcommit_res *res)
7282 {
7283         struct compound_hdr hdr;
7284         int status;
7285
7286         status = decode_compound_hdr(xdr, &hdr);
7287         if (status)
7288                 goto out;
7289         status = decode_sequence(xdr, &res->seq_res, rqstp);
7290         if (status)
7291                 goto out;
7292         status = decode_putfh(xdr);
7293         if (status)
7294                 goto out;
7295         status = decode_layoutcommit(xdr, rqstp, res);
7296         if (status)
7297                 goto out;
7298         decode_getfattr(xdr, res->fattr, res->server);
7299 out:
7300         return status;
7301 }
7302
7303 /*
7304  * Decode SECINFO_NO_NAME response
7305  */
7306 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7307                                         struct xdr_stream *xdr,
7308                                         struct nfs4_secinfo_res *res)
7309 {
7310         struct compound_hdr hdr;
7311         int status;
7312
7313         status = decode_compound_hdr(xdr, &hdr);
7314         if (status)
7315                 goto out;
7316         status = decode_sequence(xdr, &res->seq_res, rqstp);
7317         if (status)
7318                 goto out;
7319         status = decode_putrootfh(xdr);
7320         if (status)
7321                 goto out;
7322         status = decode_secinfo_no_name(xdr, res);
7323 out:
7324         return status;
7325 }
7326
7327 /*
7328  * Decode TEST_STATEID response
7329  */
7330 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7331                                      struct xdr_stream *xdr,
7332                                      struct nfs41_test_stateid_res *res)
7333 {
7334         struct compound_hdr hdr;
7335         int status;
7336
7337         status = decode_compound_hdr(xdr, &hdr);
7338         if (status)
7339                 goto out;
7340         status = decode_sequence(xdr, &res->seq_res, rqstp);
7341         if (status)
7342                 goto out;
7343         status = decode_test_stateid(xdr, res);
7344 out:
7345         return status;
7346 }
7347
7348 /*
7349  * Decode FREE_STATEID response
7350  */
7351 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7352                                      struct xdr_stream *xdr,
7353                                      struct nfs41_free_stateid_res *res)
7354 {
7355         struct compound_hdr hdr;
7356         int status;
7357
7358         status = decode_compound_hdr(xdr, &hdr);
7359         if (status)
7360                 goto out;
7361         status = decode_sequence(xdr, &res->seq_res, rqstp);
7362         if (status)
7363                 goto out;
7364         status = decode_free_stateid(xdr, res);
7365 out:
7366         return status;
7367 }
7368 #endif /* CONFIG_NFS_V4_1 */
7369
7370 /**
7371  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7372  *                      the local page cache.
7373  * @xdr: XDR stream where entry resides
7374  * @entry: buffer to fill in with entry data
7375  * @plus: boolean indicating whether this should be a readdirplus entry
7376  *
7377  * Returns zero if successful, otherwise a negative errno value is
7378  * returned.
7379  *
7380  * This function is not invoked during READDIR reply decoding, but
7381  * rather whenever an application invokes the getdents(2) system call
7382  * on a directory already in our cache.
7383  */
7384 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7385                        int plus)
7386 {
7387         unsigned int savep;
7388         uint32_t bitmap[3] = {0};
7389         uint32_t len;
7390         __be32 *p = xdr_inline_decode(xdr, 4);
7391         if (unlikely(!p))
7392                 goto out_overflow;
7393         if (*p == xdr_zero) {
7394                 p = xdr_inline_decode(xdr, 4);
7395                 if (unlikely(!p))
7396                         goto out_overflow;
7397                 if (*p == xdr_zero)
7398                         return -EAGAIN;
7399                 entry->eof = 1;
7400                 return -EBADCOOKIE;
7401         }
7402
7403         p = xdr_inline_decode(xdr, 12);
7404         if (unlikely(!p))
7405                 goto out_overflow;
7406         entry->prev_cookie = entry->cookie;
7407         p = xdr_decode_hyper(p, &entry->cookie);
7408         entry->len = be32_to_cpup(p);
7409
7410         p = xdr_inline_decode(xdr, entry->len);
7411         if (unlikely(!p))
7412                 goto out_overflow;
7413         entry->name = (const char *) p;
7414
7415         /*
7416          * In case the server doesn't return an inode number,
7417          * we fake one here.  (We don't use inode number 0,
7418          * since glibc seems to choke on it...)
7419          */
7420         entry->ino = 1;
7421         entry->fattr->valid = 0;
7422
7423         if (decode_attr_bitmap(xdr, bitmap) < 0)
7424                 goto out_overflow;
7425
7426         if (decode_attr_length(xdr, &len, &savep) < 0)
7427                 goto out_overflow;
7428
7429         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7430                         NULL, entry->label, entry->server) < 0)
7431                 goto out_overflow;
7432         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7433                 entry->ino = entry->fattr->mounted_on_fileid;
7434         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7435                 entry->ino = entry->fattr->fileid;
7436
7437         entry->d_type = DT_UNKNOWN;
7438         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7439                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7440
7441         return 0;
7442
7443 out_overflow:
7444         print_overflow_msg(__func__, xdr);
7445         return -EAGAIN;
7446 }
7447
7448 /*
7449  * We need to translate between nfs status return values and
7450  * the local errno values which may not be the same.
7451  */
7452 static struct {
7453         int stat;
7454         int errno;
7455 } nfs_errtbl[] = {
7456         { NFS4_OK,              0               },
7457         { NFS4ERR_PERM,         -EPERM          },
7458         { NFS4ERR_NOENT,        -ENOENT         },
7459         { NFS4ERR_IO,           -errno_NFSERR_IO},
7460         { NFS4ERR_NXIO,         -ENXIO          },
7461         { NFS4ERR_ACCESS,       -EACCES         },
7462         { NFS4ERR_EXIST,        -EEXIST         },
7463         { NFS4ERR_XDEV,         -EXDEV          },
7464         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7465         { NFS4ERR_ISDIR,        -EISDIR         },
7466         { NFS4ERR_INVAL,        -EINVAL         },
7467         { NFS4ERR_FBIG,         -EFBIG          },
7468         { NFS4ERR_NOSPC,        -ENOSPC         },
7469         { NFS4ERR_ROFS,         -EROFS          },
7470         { NFS4ERR_MLINK,        -EMLINK         },
7471         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7472         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7473         { NFS4ERR_DQUOT,        -EDQUOT         },
7474         { NFS4ERR_STALE,        -ESTALE         },
7475         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7476         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7477         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7478         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7479         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7480         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7481         { NFS4ERR_LOCKED,       -EAGAIN         },
7482         { NFS4ERR_SYMLINK,      -ELOOP          },
7483         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7484         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7485         { -1,                   -EIO            }
7486 };
7487
7488 /*
7489  * Convert an NFS error code to a local one.
7490  * This one is used jointly by NFSv2 and NFSv3.
7491  */
7492 static int
7493 nfs4_stat_to_errno(int stat)
7494 {
7495         int i;
7496         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7497                 if (nfs_errtbl[i].stat == stat)
7498                         return nfs_errtbl[i].errno;
7499         }
7500         if (stat <= 10000 || stat > 10100) {
7501                 /* The server is looney tunes. */
7502                 return -EREMOTEIO;
7503         }
7504         /* If we cannot translate the error, the recovery routines should
7505          * handle it.
7506          * Note: remaining NFSv4 error codes have values > 10000, so should
7507          * not conflict with native Linux error codes.
7508          */
7509         return -stat;
7510 }
7511
7512 #ifdef CONFIG_NFS_V4_2
7513 #include "nfs42xdr.c"
7514 #endif /* CONFIG_NFS_V4_2 */
7515
7516 #define PROC(proc, argtype, restype)                            \
7517 [NFSPROC4_CLNT_##proc] = {                                      \
7518         .p_proc   = NFSPROC4_COMPOUND,                          \
7519         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7520         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7521         .p_arglen = NFS4_##argtype##_sz,                        \
7522         .p_replen = NFS4_##restype##_sz,                        \
7523         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7524         .p_name   = #proc,                                      \
7525 }
7526
7527 #define STUB(proc)              \
7528 [NFSPROC4_CLNT_##proc] = {      \
7529         .p_name = #proc,        \
7530 }
7531
7532 struct rpc_procinfo     nfs4_procedures[] = {
7533         PROC(READ,              enc_read,               dec_read),
7534         PROC(WRITE,             enc_write,              dec_write),
7535         PROC(COMMIT,            enc_commit,             dec_commit),
7536         PROC(OPEN,              enc_open,               dec_open),
7537         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7538         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7539         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7540         PROC(CLOSE,             enc_close,              dec_close),
7541         PROC(SETATTR,           enc_setattr,            dec_setattr),
7542         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7543         PROC(RENEW,             enc_renew,              dec_renew),
7544         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7545         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7546         PROC(LOCK,              enc_lock,               dec_lock),
7547         PROC(LOCKT,             enc_lockt,              dec_lockt),
7548         PROC(LOCKU,             enc_locku,              dec_locku),
7549         PROC(ACCESS,            enc_access,             dec_access),
7550         PROC(GETATTR,           enc_getattr,            dec_getattr),
7551         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7552         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7553         PROC(REMOVE,            enc_remove,             dec_remove),
7554         PROC(RENAME,            enc_rename,             dec_rename),
7555         PROC(LINK,              enc_link,               dec_link),
7556         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7557         PROC(CREATE,            enc_create,             dec_create),
7558         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7559         PROC(STATFS,            enc_statfs,             dec_statfs),
7560         PROC(READLINK,          enc_readlink,           dec_readlink),
7561         PROC(READDIR,           enc_readdir,            dec_readdir),
7562         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7563         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7564         PROC(GETACL,            enc_getacl,             dec_getacl),
7565         PROC(SETACL,            enc_setacl,             dec_setacl),
7566         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7567         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7568         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7569         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7570 #if defined(CONFIG_NFS_V4_1)
7571         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7572         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7573         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7574         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7575         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7576         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7577         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7578         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7579         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7580         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7581         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7582         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7583         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7584         STUB(GETDEVICELIST),
7585         PROC(BIND_CONN_TO_SESSION,
7586                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7587         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7588 #endif /* CONFIG_NFS_V4_1 */
7589 #ifdef CONFIG_NFS_V4_2
7590         PROC(SEEK,              enc_seek,               dec_seek),
7591         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7592         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7593         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7594         PROC(CLONE,             enc_clone,              dec_clone),
7595         PROC(COPY,              enc_copy,               dec_copy),
7596 #endif /* CONFIG_NFS_V4_2 */
7597 };
7598
7599 const struct rpc_version nfs_version4 = {
7600         .number                 = 4,
7601         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7602         .procs                  = nfs4_procedures
7603 };
7604
7605 /*
7606  * Local variables:
7607  *  c-basic-offset: 8
7608  * End:
7609  */