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_space_limit_maxsz        (3)
 173 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 174 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 175                                 decode_space_limit_maxsz + \
 176                                 decode_ace_maxsz)
 177 #define decode_change_info_maxsz        (5)
 178 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 179                                 decode_stateid_maxsz + \
 180                                 decode_change_info_maxsz + 1 + \
 181                                 nfs4_fattr_bitmap_maxsz + \
 182                                 decode_delegation_maxsz)
 183 #define encode_open_confirm_maxsz \
 184                                 (op_encode_hdr_maxsz + \
 185                                  encode_stateid_maxsz + 1)
 186 #define decode_open_confirm_maxsz \
 187                                 (op_decode_hdr_maxsz + \
 188                                  decode_stateid_maxsz)
 189 #define encode_open_downgrade_maxsz \
 190                                 (op_encode_hdr_maxsz + \
 191                                  encode_stateid_maxsz + 1 + \
 192                                  encode_share_access_maxsz)
 193 #define decode_open_downgrade_maxsz \
 194                                 (op_decode_hdr_maxsz + \
 195                                  decode_stateid_maxsz)
 196 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 197                                  1 + encode_stateid_maxsz)
 198 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 199                                  decode_stateid_maxsz)
 200 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 201                                  encode_stateid_maxsz + \
 202                                  encode_attrs_maxsz)
 203 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 204                                  nfs4_fattr_bitmap_maxsz)
 205 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 206                                  encode_stateid_maxsz + 3)
 207 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 208 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 209                                  2 + encode_verifier_maxsz + 5 + \
 210                                 nfs4_label_maxsz)
 211 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 212                                  decode_verifier_maxsz)
 213 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 214 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 215 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 216                                  encode_stateid_maxsz + 4)
 217 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 218                                  2 + decode_verifier_maxsz)
 219 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 220 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 221                                  decode_verifier_maxsz)
 222 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 223                                 nfs4_name_maxsz)
 224 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 225                                  decode_change_info_maxsz)
 226 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 227                                 2 * nfs4_name_maxsz)
 228 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 229                                  decode_change_info_maxsz + \
 230                                  decode_change_info_maxsz)
 231 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 232                                 nfs4_name_maxsz)
 233 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 234 #define encode_lockowner_maxsz  (7)
 235 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 236                                  7 + \
 237                                  1 + encode_stateid_maxsz + 1 + \
 238                                  encode_lockowner_maxsz)
 239 #define decode_lock_denied_maxsz \
 240                                 (8 + decode_lockowner_maxsz)
 241 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 242                                  decode_lock_denied_maxsz)
 243 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 244                                 encode_lockowner_maxsz)
 245 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 246                                  decode_lock_denied_maxsz)
 247 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 248                                  encode_stateid_maxsz + \
 249                                  4)
 250 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 251                                  decode_stateid_maxsz)
 252 #define encode_release_lockowner_maxsz \
 253                                 (op_encode_hdr_maxsz + \
 254                                  encode_lockowner_maxsz)
 255 #define decode_release_lockowner_maxsz \
 256                                 (op_decode_hdr_maxsz)
 257 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 258 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 259 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 260                                 1 + nfs4_name_maxsz + \
 261                                 1 + \
 262                                 nfs4_fattr_maxsz)
 263 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 264 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 265                                 1 + 2 + nfs4_name_maxsz + \
 266                                 encode_attrs_maxsz)
 267 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 268                                 decode_change_info_maxsz + \
 269                                 nfs4_fattr_bitmap_maxsz)
 270 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 271 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 272 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 273 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 274 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 275 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 276                                  nfs4_fattr_bitmap_maxsz + 1)
 277 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 278                                  encode_stateid_maxsz + 3)
 279 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 280 #define encode_fs_locations_maxsz \
 281                                 (encode_getattr_maxsz)
 282 #define decode_fs_locations_maxsz \
 283                                 (0)
 284 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 285 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 286
 287 #if defined(CONFIG_NFS_V4_1)
 288 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 289 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 290                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 291
 292 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 293                                 encode_verifier_maxsz + \
 294                                 1 /* co_ownerid.len */ + \
 295                                 /* eia_clientowner */ \
 296                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 297                                 1 /* flags */ + \
 298                                 1 /* spa_how */ + \
 299                                 /* max is SP4_MACH_CRED (for now) */ + \
 300                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 301                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 302                                 1 /* implementation id array of size 1 */ + \
 303                                 1 /* nii_domain */ + \
 304                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 305                                 1 /* nii_name */ + \
 306                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 307                                 3 /* nii_date */)
 308 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 309                                 2 /* eir_clientid */ + \
 310                                 1 /* eir_sequenceid */ + \
 311                                 1 /* eir_flags */ + \
 312                                 1 /* spr_how */ + \
 313                                   /* max is SP4_MACH_CRED (for now) */ + \
 314                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 315                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 316                                 2 /* eir_server_owner.so_minor_id */ + \
 317                                 /* eir_server_owner.so_major_id<> */ \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 319                                 /* eir_server_scope<> */ \
 320                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 321                                 1 /* eir_server_impl_id array length */ + \
 322                                 1 /* nii_domain */ + \
 323                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 324                                 1 /* nii_name */ + \
 325                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 326                                 3 /* nii_date */)
 327 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 328 #define decode_channel_attrs_maxsz  (6 + \
 329                                      1 /* ca_rdma_ird.len */ + \
 330                                      1 /* ca_rdma_ird */)
 331 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 332                                      2 /* csa_clientid */ + \
 333                                      1 /* csa_sequence */ + \
 334                                      1 /* csa_flags */ + \
 335                                      encode_channel_attrs_maxsz + \
 336                                      encode_channel_attrs_maxsz + \
 337                                      1 /* csa_cb_program */ + \
 338                                      1 /* csa_sec_parms.len (1) */ + \
 339                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 340                                      1 /* stamp */ + \
 341                                      1 /* machinename.len */ + \
 342                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 343                                      1 /* uid */ + \
 344                                      1 /* gid */ + \
 345                                      1 /* gids.len (0) */)
 346 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 347                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 348                                      1 /* csr_sequence */ + \
 349                                      1 /* csr_flags */ + \
 350                                      decode_channel_attrs_maxsz + \
 351                                      decode_channel_attrs_maxsz)
 352 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 353                                      /* bctsa_sessid */ \
 354                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 355                                      1 /* bctsa_dir */ + \
 356                                      1 /* bctsa_use_conn_in_rdma_mode */)
 357 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 358                                      /* bctsr_sessid */ \
 359                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 360                                      1 /* bctsr_dir */ + \
 361                                      1 /* bctsr_use_conn_in_rdma_mode */)
 362 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 363 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 364 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 365 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 366 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 367                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 368 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 369                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 370 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 371 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 372 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 373                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 374                                 1 /* layout type */ + \
 375                                 1 /* maxcount */ + \
 376                                 1 /* bitmap size */ + \
 377                                 1 /* notification bitmap length */ + \
 378                                 1 /* notification bitmap, word 0 */)
 379 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 380                                 1 /* layout type */ + \
 381                                 1 /* opaque devaddr4 length */ + \
 382                                   /* devaddr4 payload is read into page */ \
 383                                 1 /* notification bitmap length */ + \
 384                                 1 /* notification bitmap, word 0 */)
 385 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 386                                 encode_stateid_maxsz)
 387 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 388                                 decode_stateid_maxsz + \
 389                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 390 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 391                                 2 /* offset */ + \
 392                                 2 /* length */ + \
 393                                 1 /* reclaim */ + \
 394                                 encode_stateid_maxsz + \
 395                                 1 /* new offset (true) */ + \
 396                                 2 /* last byte written */ + \
 397                                 1 /* nt_timechanged (false) */ + \
 398                                 1 /* layoutupdate4 layout type */ + \
 399                                 1 /* layoutupdate4 opaqueue len */)
 400                                   /* the actual content of layoutupdate4 should
 401                                      be allocated by drivers and spliced in
 402                                      using xdr_write_pages */
 403 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 404 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 405                                 encode_stateid_maxsz + \
 406                                 1 + \
 407                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 408 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 409                                 1 + decode_stateid_maxsz)
 410 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 411 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 412 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 413                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 414 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 415 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 416                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 417 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 418 #else /* CONFIG_NFS_V4_1 */
 419 #define encode_sequence_maxsz   0
 420 #define decode_sequence_maxsz   0
 421 #define encode_layoutreturn_maxsz 0
 422 #define decode_layoutreturn_maxsz 0
 423 #endif /* CONFIG_NFS_V4_1 */
 424
 425 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 426 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 427 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 428                                 encode_sequence_maxsz + \
 429                                 encode_putfh_maxsz + \
 430                                 encode_read_maxsz)
 431 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 432                                 decode_sequence_maxsz + \
 433                                 decode_putfh_maxsz + \
 434                                 decode_read_maxsz)
 435 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 436                                 encode_sequence_maxsz + \
 437                                 encode_putfh_maxsz + \
 438                                 encode_readlink_maxsz)
 439 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 440                                 decode_sequence_maxsz + \
 441                                 decode_putfh_maxsz + \
 442                                 decode_readlink_maxsz)
 443 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 444                                 encode_sequence_maxsz + \
 445                                 encode_putfh_maxsz + \
 446                                 encode_readdir_maxsz)
 447 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 448                                 decode_sequence_maxsz + \
 449                                 decode_putfh_maxsz + \
 450                                 decode_readdir_maxsz)
 451 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 452                                 encode_sequence_maxsz + \
 453                                 encode_putfh_maxsz + \
 454                                 encode_write_maxsz + \
 455                                 encode_getattr_maxsz)
 456 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 457                                 decode_sequence_maxsz + \
 458                                 decode_putfh_maxsz + \
 459                                 decode_write_maxsz + \
 460                                 decode_getattr_maxsz)
 461 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 462                                 encode_sequence_maxsz + \
 463                                 encode_putfh_maxsz + \
 464                                 encode_commit_maxsz)
 465 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 466                                 decode_sequence_maxsz + \
 467                                 decode_putfh_maxsz + \
 468                                 decode_commit_maxsz)
 469 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 470                                 encode_sequence_maxsz + \
 471                                 encode_putfh_maxsz + \
 472                                 encode_open_maxsz + \
 473                                 encode_access_maxsz + \
 474                                 encode_getfh_maxsz + \
 475                                 encode_getattr_maxsz)
 476 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 477                                 decode_sequence_maxsz + \
 478                                 decode_putfh_maxsz + \
 479                                 decode_open_maxsz + \
 480                                 decode_access_maxsz + \
 481                                 decode_getfh_maxsz + \
 482                                 decode_getattr_maxsz)
 483 #define NFS4_enc_open_confirm_sz \
 484                                 (compound_encode_hdr_maxsz + \
 485                                  encode_putfh_maxsz + \
 486                                  encode_open_confirm_maxsz)
 487 #define NFS4_dec_open_confirm_sz \
 488                                 (compound_decode_hdr_maxsz + \
 489                                  decode_putfh_maxsz + \
 490                                  decode_open_confirm_maxsz)
 491 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 492                                         encode_sequence_maxsz + \
 493                                         encode_putfh_maxsz + \
 494                                         encode_open_maxsz + \
 495                                         encode_access_maxsz + \
 496                                         encode_getattr_maxsz)
 497 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 498                                         decode_sequence_maxsz + \
 499                                         decode_putfh_maxsz + \
 500                                         decode_open_maxsz + \
 501                                         decode_access_maxsz + \
 502                                         decode_getattr_maxsz)
 503 #define NFS4_enc_open_downgrade_sz \
 504                                 (compound_encode_hdr_maxsz + \
 505                                  encode_sequence_maxsz + \
 506                                  encode_putfh_maxsz + \
 507                                  encode_layoutreturn_maxsz + \
 508                                  encode_open_downgrade_maxsz)
 509 #define NFS4_dec_open_downgrade_sz \
 510                                 (compound_decode_hdr_maxsz + \
 511                                  decode_sequence_maxsz + \
 512                                  decode_putfh_maxsz + \
 513                                  decode_layoutreturn_maxsz + \
 514                                  decode_open_downgrade_maxsz)
 515 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 516                                  encode_sequence_maxsz + \
 517                                  encode_putfh_maxsz + \
 518                                  encode_layoutreturn_maxsz + \
 519                                  encode_close_maxsz + \
 520                                  encode_getattr_maxsz)
 521 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 522                                  decode_sequence_maxsz + \
 523                                  decode_putfh_maxsz + \
 524                                  decode_layoutreturn_maxsz + \
 525                                  decode_close_maxsz + \
 526                                  decode_getattr_maxsz)
 527 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 528                                  encode_sequence_maxsz + \
 529                                  encode_putfh_maxsz + \
 530                                  encode_setattr_maxsz + \
 531                                  encode_getattr_maxsz)
 532 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 533                                  decode_sequence_maxsz + \
 534                                  decode_putfh_maxsz + \
 535                                  decode_setattr_maxsz + \
 536                                  decode_getattr_maxsz)
 537 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 538                                 encode_sequence_maxsz + \
 539                                 encode_putfh_maxsz + \
 540                                 encode_fsinfo_maxsz)
 541 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 542                                 decode_sequence_maxsz + \
 543                                 decode_putfh_maxsz + \
 544                                 decode_fsinfo_maxsz)
 545 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 546                                 encode_renew_maxsz)
 547 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 548                                 decode_renew_maxsz)
 549 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 550                                 encode_setclientid_maxsz)
 551 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 552                                 decode_setclientid_maxsz)
 553 #define NFS4_enc_setclientid_confirm_sz \
 554                                 (compound_encode_hdr_maxsz + \
 555                                 encode_setclientid_confirm_maxsz)
 556 #define NFS4_dec_setclientid_confirm_sz \
 557                                 (compound_decode_hdr_maxsz + \
 558                                 decode_setclientid_confirm_maxsz)
 559 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 560                                 encode_sequence_maxsz + \
 561                                 encode_putfh_maxsz + \
 562                                 encode_lock_maxsz)
 563 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 564                                 decode_sequence_maxsz + \
 565                                 decode_putfh_maxsz + \
 566                                 decode_lock_maxsz)
 567 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_lockt_maxsz)
 571 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 572                                  decode_sequence_maxsz + \
 573                                  decode_putfh_maxsz + \
 574                                  decode_lockt_maxsz)
 575 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 576                                 encode_sequence_maxsz + \
 577                                 encode_putfh_maxsz + \
 578                                 encode_locku_maxsz)
 579 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_locku_maxsz)
 583 #define NFS4_enc_release_lockowner_sz \
 584                                 (compound_encode_hdr_maxsz + \
 585                                  encode_lockowner_maxsz)
 586 #define NFS4_dec_release_lockowner_sz \
 587                                 (compound_decode_hdr_maxsz + \
 588                                  decode_lockowner_maxsz)
 589 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 590                                 encode_sequence_maxsz + \
 591                                 encode_putfh_maxsz + \
 592                                 encode_access_maxsz + \
 593                                 encode_getattr_maxsz)
 594 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 595                                 decode_sequence_maxsz + \
 596                                 decode_putfh_maxsz + \
 597                                 decode_access_maxsz + \
 598                                 decode_getattr_maxsz)
 599 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 600                                 encode_sequence_maxsz + \
 601                                 encode_putfh_maxsz + \
 602                                 encode_getattr_maxsz + \
 603                                 encode_renew_maxsz)
 604 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 605                                 decode_sequence_maxsz + \
 606                                 decode_putfh_maxsz + \
 607                                 decode_getattr_maxsz + \
 608                                 decode_renew_maxsz)
 609 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 610                                 encode_sequence_maxsz + \
 611                                 encode_putfh_maxsz + \
 612                                 encode_lookup_maxsz + \
 613                                 encode_getattr_maxsz + \
 614                                 encode_getfh_maxsz)
 615 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 616                                 decode_sequence_maxsz + \
 617                                 decode_putfh_maxsz + \
 618                                 decode_lookup_maxsz + \
 619                                 decode_getattr_maxsz + \
 620                                 decode_getfh_maxsz)
 621 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putrootfh_maxsz + \
 624                                 encode_getattr_maxsz + \
 625                                 encode_getfh_maxsz)
 626 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 627                                 decode_sequence_maxsz + \
 628                                 decode_putrootfh_maxsz + \
 629                                 decode_getattr_maxsz + \
 630                                 decode_getfh_maxsz)
 631 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 632                                 encode_sequence_maxsz + \
 633                                 encode_putfh_maxsz + \
 634                                 encode_remove_maxsz)
 635 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 636                                 decode_sequence_maxsz + \
 637                                 decode_putfh_maxsz + \
 638                                 decode_remove_maxsz)
 639 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 640                                 encode_sequence_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_savefh_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_rename_maxsz)
 645 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 646                                 decode_sequence_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_savefh_maxsz + \
 649                                 decode_putfh_maxsz + \
 650                                 decode_rename_maxsz)
 651 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 652                                 encode_sequence_maxsz + \
 653                                 encode_putfh_maxsz + \
 654                                 encode_savefh_maxsz + \
 655                                 encode_putfh_maxsz + \
 656                                 encode_link_maxsz + \
 657                                 encode_restorefh_maxsz + \
 658                                 encode_getattr_maxsz)
 659 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 660                                 decode_sequence_maxsz + \
 661                                 decode_putfh_maxsz + \
 662                                 decode_savefh_maxsz + \
 663                                 decode_putfh_maxsz + \
 664                                 decode_link_maxsz + \
 665                                 decode_restorefh_maxsz + \
 666                                 decode_getattr_maxsz)
 667 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 668                                 encode_sequence_maxsz + \
 669                                 encode_putfh_maxsz + \
 670                                 encode_symlink_maxsz + \
 671                                 encode_getattr_maxsz + \
 672                                 encode_getfh_maxsz)
 673 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 674                                 decode_sequence_maxsz + \
 675                                 decode_putfh_maxsz + \
 676                                 decode_symlink_maxsz + \
 677                                 decode_getattr_maxsz + \
 678                                 decode_getfh_maxsz)
 679 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 680                                 encode_sequence_maxsz + \
 681                                 encode_putfh_maxsz + \
 682                                 encode_create_maxsz + \
 683                                 encode_getfh_maxsz + \
 684                                 encode_getattr_maxsz)
 685 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 686                                 decode_sequence_maxsz + \
 687                                 decode_putfh_maxsz + \
 688                                 decode_create_maxsz + \
 689                                 decode_getfh_maxsz + \
 690                                 decode_getattr_maxsz)
 691 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 692                                 encode_sequence_maxsz + \
 693                                 encode_putfh_maxsz + \
 694                                 encode_getattr_maxsz)
 695 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 696                                 decode_sequence_maxsz + \
 697                                 decode_putfh_maxsz + \
 698                                 decode_getattr_maxsz)
 699 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 700                                 encode_sequence_maxsz + \
 701                                 encode_putfh_maxsz + \
 702                                 encode_statfs_maxsz)
 703 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 704                                 decode_sequence_maxsz + \
 705                                 decode_putfh_maxsz + \
 706                                 decode_statfs_maxsz)
 707 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 708                                 encode_sequence_maxsz + \
 709                                 encode_putfh_maxsz + \
 710                                 encode_getattr_maxsz)
 711 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 712                                 decode_sequence_maxsz + \
 713                                 decode_putfh_maxsz + \
 714                                 decode_getattr_maxsz)
 715 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 716                                 encode_sequence_maxsz + \
 717                                 encode_putfh_maxsz + \
 718                                 encode_layoutreturn_maxsz + \
 719                                 encode_delegreturn_maxsz + \
 720                                 encode_getattr_maxsz)
 721 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 722                                 decode_sequence_maxsz + \
 723                                 decode_putfh_maxsz + \
 724                                 decode_layoutreturn_maxsz + \
 725                                 decode_delegreturn_maxsz + \
 726                                 decode_getattr_maxsz)
 727 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 728                                 encode_sequence_maxsz + \
 729                                 encode_putfh_maxsz + \
 730                                 encode_getacl_maxsz)
 731 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 732                                 decode_sequence_maxsz + \
 733                                 decode_putfh_maxsz + \
 734                                 decode_getacl_maxsz)
 735 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 736                                 encode_sequence_maxsz + \
 737                                 encode_putfh_maxsz + \
 738                                 encode_setacl_maxsz)
 739 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 740                                 decode_sequence_maxsz + \
 741                                 decode_putfh_maxsz + \
 742                                 decode_setacl_maxsz)
 743 #define NFS4_enc_fs_locations_sz \
 744                                 (compound_encode_hdr_maxsz + \
 745                                  encode_sequence_maxsz + \
 746                                  encode_putfh_maxsz + \
 747                                  encode_lookup_maxsz + \
 748                                  encode_fs_locations_maxsz + \
 749                                  encode_renew_maxsz)
 750 #define NFS4_dec_fs_locations_sz \
 751                                 (compound_decode_hdr_maxsz + \
 752                                  decode_sequence_maxsz + \
 753                                  decode_putfh_maxsz + \
 754                                  decode_lookup_maxsz + \
 755                                  decode_fs_locations_maxsz + \
 756                                  decode_renew_maxsz)
 757 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 758                                 encode_sequence_maxsz + \
 759                                 encode_putfh_maxsz + \
 760                                 encode_secinfo_maxsz)
 761 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 762                                 decode_sequence_maxsz + \
 763                                 decode_putfh_maxsz + \
 764                                 decode_secinfo_maxsz)
 765 #define NFS4_enc_fsid_present_sz \
 766                                 (compound_encode_hdr_maxsz + \
 767                                  encode_sequence_maxsz + \
 768                                  encode_putfh_maxsz + \
 769                                  encode_getfh_maxsz + \
 770                                  encode_renew_maxsz)
 771 #define NFS4_dec_fsid_present_sz \
 772                                 (compound_decode_hdr_maxsz + \
 773                                  decode_sequence_maxsz + \
 774                                  decode_putfh_maxsz + \
 775                                  decode_getfh_maxsz + \
 776                                  decode_renew_maxsz)
 777 #if defined(CONFIG_NFS_V4_1)
 778 #define NFS4_enc_bind_conn_to_session_sz \
 779                                 (compound_encode_hdr_maxsz + \
 780                                  encode_bind_conn_to_session_maxsz)
 781 #define NFS4_dec_bind_conn_to_session_sz \
 782                                 (compound_decode_hdr_maxsz + \
 783                                  decode_bind_conn_to_session_maxsz)
 784 #define NFS4_enc_exchange_id_sz \
 785                                 (compound_encode_hdr_maxsz + \
 786                                  encode_exchange_id_maxsz)
 787 #define NFS4_dec_exchange_id_sz \
 788                                 (compound_decode_hdr_maxsz + \
 789                                  decode_exchange_id_maxsz)
 790 #define NFS4_enc_create_session_sz \
 791                                 (compound_encode_hdr_maxsz + \
 792                                  encode_create_session_maxsz)
 793 #define NFS4_dec_create_session_sz \
 794                                 (compound_decode_hdr_maxsz + \
 795                                  decode_create_session_maxsz)
 796 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 797                                          encode_destroy_session_maxsz)
 798 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 799                                          decode_destroy_session_maxsz)
 800 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 801                                          encode_destroy_clientid_maxsz)
 802 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 803                                          decode_destroy_clientid_maxsz)
 804 #define NFS4_enc_sequence_sz \
 805                                 (compound_decode_hdr_maxsz + \
 806                                  encode_sequence_maxsz)
 807 #define NFS4_dec_sequence_sz \
 808                                 (compound_decode_hdr_maxsz + \
 809                                  decode_sequence_maxsz)
 810 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 811                                          encode_sequence_maxsz + \
 812                                          encode_putrootfh_maxsz + \
 813                                          encode_fsinfo_maxsz)
 814 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 815                                          decode_sequence_maxsz + \
 816                                          decode_putrootfh_maxsz + \
 817                                          decode_fsinfo_maxsz)
 818 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 819                                          encode_sequence_maxsz + \
 820                                          encode_reclaim_complete_maxsz)
 821 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 822                                          decode_sequence_maxsz + \
 823                                          decode_reclaim_complete_maxsz)
 824 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 825                                 encode_sequence_maxsz +\
 826                                 encode_getdeviceinfo_maxsz)
 827 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 828                                 decode_sequence_maxsz + \
 829                                 decode_getdeviceinfo_maxsz)
 830 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 831                                 encode_sequence_maxsz + \
 832                                 encode_putfh_maxsz +        \
 833                                 encode_layoutget_maxsz)
 834 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 835                                 decode_sequence_maxsz + \
 836                                 decode_putfh_maxsz +        \
 837                                 decode_layoutget_maxsz)
 838 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 839                                 encode_sequence_maxsz +\
 840                                 encode_putfh_maxsz + \
 841                                 encode_layoutcommit_maxsz + \
 842                                 encode_getattr_maxsz)
 843 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 844                                 decode_sequence_maxsz + \
 845                                 decode_putfh_maxsz + \
 846                                 decode_layoutcommit_maxsz + \
 847                                 decode_getattr_maxsz)
 848 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 849                                 encode_sequence_maxsz + \
 850                                 encode_putfh_maxsz + \
 851                                 encode_layoutreturn_maxsz)
 852 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 853                                 decode_sequence_maxsz + \
 854                                 decode_putfh_maxsz + \
 855                                 decode_layoutreturn_maxsz)
 856 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 857                                         encode_sequence_maxsz + \
 858                                         encode_putrootfh_maxsz +\
 859                                         encode_secinfo_no_name_maxsz)
 860 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 861                                         decode_sequence_maxsz + \
 862                                         decode_putrootfh_maxsz + \
 863                                         decode_secinfo_no_name_maxsz)
 864 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 865                                          encode_sequence_maxsz + \
 866                                          encode_test_stateid_maxsz)
 867 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 868                                          decode_sequence_maxsz + \
 869                                          decode_test_stateid_maxsz)
 870 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 871                                          encode_sequence_maxsz + \
 872                                          encode_free_stateid_maxsz)
 873 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 874                                          decode_sequence_maxsz + \
 875                                          decode_free_stateid_maxsz)
 876
 877 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 878                                       compound_encode_hdr_maxsz +
 879                                       encode_sequence_maxsz +
 880                                       encode_putfh_maxsz +
 881                                       encode_getattr_maxsz) *
 882                                      XDR_UNIT);
 883
 884 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 885                                      compound_decode_hdr_maxsz +
 886                                      decode_sequence_maxsz +
 887                                      decode_putfh_maxsz) *
 888                                     XDR_UNIT);
 889
 890 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 891                                            compound_decode_hdr_maxsz +
 892                                            decode_sequence_maxsz) *
 893                                           XDR_UNIT);
 894 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 895 #endif /* CONFIG_NFS_V4_1 */
 896
 897 static const umode_t nfs_type2fmt[] = {
 898         [NF4BAD] = 0,
 899         [NF4REG] = S_IFREG,
 900         [NF4DIR] = S_IFDIR,
 901         [NF4BLK] = S_IFBLK,
 902         [NF4CHR] = S_IFCHR,
 903         [NF4LNK] = S_IFLNK,
 904         [NF4SOCK] = S_IFSOCK,
 905         [NF4FIFO] = S_IFIFO,
 906         [NF4ATTRDIR] = 0,
 907         [NF4NAMEDATTR] = 0,
 908 };
 909
 910 struct compound_hdr {
 911         int32_t         status;
 912         uint32_t        nops;
 913         __be32 *        nops_p;
 914         uint32_t        taglen;
 915         char *          tag;
 916         uint32_t        replen;         /* expected reply words */
 917         u32             minorversion;
 918 };
 919
 920 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 921 {
 922         __be32 *p = xdr_reserve_space(xdr, nbytes);
 923         BUG_ON(!p);
 924         return p;
 925 }
 926
 927 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 928 {
 929         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 930 }
 931
 932 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 933 {
 934         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 935 }
 936
 937 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 938 {
 939         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 940 }
 941
 942 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 943 {
 944         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 945 }
 946
 947 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 948                 const struct nfs_seqid *seqid)
 949 {
 950         if (seqid != NULL)
 951                 encode_uint32(xdr, seqid->sequence->counter);
 952         else
 953                 encode_uint32(xdr, 0);
 954 }
 955
 956 static void encode_compound_hdr(struct xdr_stream *xdr,
 957                                 struct rpc_rqst *req,
 958                                 struct compound_hdr *hdr)
 959 {
 960         __be32 *p;
 961         struct rpc_auth *auth = req->rq_cred->cr_auth;
 962
 963         /* initialize running count of expected bytes in reply.
 964          * NOTE: the replied tag SHOULD be the same is the one sent,
 965          * but this is not required as a MUST for the server to do so. */
 966         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 967
 968         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 969         encode_string(xdr, hdr->taglen, hdr->tag);
 970         p = reserve_space(xdr, 8);
 971         *p++ = cpu_to_be32(hdr->minorversion);
 972         hdr->nops_p = p;
 973         *p = cpu_to_be32(hdr->nops);
 974 }
 975
 976 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 977                 uint32_t replen,
 978                 struct compound_hdr *hdr)
 979 {
 980         encode_uint32(xdr, op);
 981         hdr->nops++;
 982         hdr->replen += replen;
 983 }
 984
 985 static void encode_nops(struct compound_hdr *hdr)
 986 {
 987         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 988         *hdr->nops_p = htonl(hdr->nops);
 989 }
 990
 991 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 992 {
 993         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 994 }
 995
 996 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 997 {
 998         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 999 }
1000
1001 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1002                                 const struct nfs4_label *label,
1003                                 const umode_t *umask,
1004                                 const struct nfs_server *server,
1005                                 const uint32_t attrmask[])
1006 {
1007         char owner_name[IDMAP_NAMESZ];
1008         char owner_group[IDMAP_NAMESZ];
1009         int owner_namelen = 0;
1010         int owner_grouplen = 0;
1011         __be32 *p;
1012         unsigned i;
1013         uint32_t len = 0;
1014         uint32_t bmval_len;
1015         uint32_t bmval[3] = { 0 };
1016
1017         /*
1018          * We reserve enough space to write the entire attribute buffer at once.
1019          */
1020         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1021                 bmval[0] |= FATTR4_WORD0_SIZE;
1022                 len += 8;
1023         }
1024         if (iap->ia_valid & ATTR_MODE) {
1025                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1026                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1027                         len += 8;
1028                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1029                         bmval[1] |= FATTR4_WORD1_MODE;
1030                         len += 4;
1031                 }
1032         }
1033         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1034                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1035                 if (owner_namelen < 0) {
1036                         dprintk("nfs: couldn't resolve uid %d to string\n",
1037                                         from_kuid(&init_user_ns, iap->ia_uid));
1038                         /* XXX */
1039                         strcpy(owner_name, "nobody");
1040                         owner_namelen = sizeof("nobody") - 1;
1041                         /* goto out; */
1042                 }
1043                 bmval[1] |= FATTR4_WORD1_OWNER;
1044                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1045         }
1046         if ((iap->ia_valid & ATTR_GID) &&
1047            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1048                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1049                 if (owner_grouplen < 0) {
1050                         dprintk("nfs: couldn't resolve gid %d to string\n",
1051                                         from_kgid(&init_user_ns, iap->ia_gid));
1052                         strcpy(owner_group, "nobody");
1053                         owner_grouplen = sizeof("nobody") - 1;
1054                         /* goto out; */
1055                 }
1056                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1057                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1058         }
1059         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1060                 if (iap->ia_valid & ATTR_ATIME_SET) {
1061                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1062                         len += 16;
1063                 } else if (iap->ia_valid & ATTR_ATIME) {
1064                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1065                         len += 4;
1066                 }
1067         }
1068         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1069                 if (iap->ia_valid & ATTR_MTIME_SET) {
1070                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1071                         len += 16;
1072                 } else if (iap->ia_valid & ATTR_MTIME) {
1073                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1074                         len += 4;
1075                 }
1076         }
1077
1078         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1079                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1080                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1081         }
1082
1083         if (bmval[2] != 0)
1084                 bmval_len = 3;
1085         else if (bmval[1] != 0)
1086                 bmval_len = 2;
1087         else
1088                 bmval_len = 1;
1089
1090         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1091
1092         *p++ = cpu_to_be32(bmval_len);
1093         for (i = 0; i < bmval_len; i++)
1094                 *p++ = cpu_to_be32(bmval[i]);
1095         *p++ = cpu_to_be32(len);
1096
1097         if (bmval[0] & FATTR4_WORD0_SIZE)
1098                 p = xdr_encode_hyper(p, iap->ia_size);
1099         if (bmval[1] & FATTR4_WORD1_MODE)
1100                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1101         if (bmval[1] & FATTR4_WORD1_OWNER)
1102                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1103         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1104                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1105         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1106                 if (iap->ia_valid & ATTR_ATIME_SET) {
1107                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1108                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1109                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1110                 } else
1111                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1112         }
1113         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1114                 if (iap->ia_valid & ATTR_MTIME_SET) {
1115                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1116                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1117                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1118                 } else
1119                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1120         }
1121         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1122                 *p++ = cpu_to_be32(label->lfs);
1123                 *p++ = cpu_to_be32(label->pi);
1124                 *p++ = cpu_to_be32(label->len);
1125                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1126         }
1127         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1128                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1129                 *p++ = cpu_to_be32(*umask);
1130         }
1131
1132 /* out: */
1133 }
1134
1135 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1136 {
1137         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1138         encode_uint32(xdr, access);
1139 }
1140
1141 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1142 {
1143         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1144         encode_nfs4_seqid(xdr, arg->seqid);
1145         encode_nfs4_stateid(xdr, &arg->stateid);
1146 }
1147
1148 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1149 {
1150         __be32 *p;
1151
1152         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1153         p = reserve_space(xdr, 12);
1154         p = xdr_encode_hyper(p, args->offset);
1155         *p = cpu_to_be32(args->count);
1156 }
1157
1158 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1159 {
1160         __be32 *p;
1161
1162         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1163         encode_uint32(xdr, create->ftype);
1164
1165         switch (create->ftype) {
1166         case NF4LNK:
1167                 p = reserve_space(xdr, 4);
1168                 *p = cpu_to_be32(create->u.symlink.len);
1169                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1170                                 create->u.symlink.len);
1171                 xdr->buf->flags |= XDRBUF_WRITE;
1172                 break;
1173
1174         case NF4BLK: case NF4CHR:
1175                 p = reserve_space(xdr, 8);
1176                 *p++ = cpu_to_be32(create->u.device.specdata1);
1177                 *p = cpu_to_be32(create->u.device.specdata2);
1178                 break;
1179
1180         default:
1181                 break;
1182         }
1183
1184         encode_string(xdr, create->name->len, create->name->name);
1185         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1186                         create->server, create->server->attr_bitmask);
1187 }
1188
1189 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1190 {
1191         __be32 *p;
1192
1193         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194         p = reserve_space(xdr, 8);
1195         *p++ = cpu_to_be32(1);
1196         *p = cpu_to_be32(bitmap);
1197 }
1198
1199 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1200 {
1201         __be32 *p;
1202
1203         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1204         p = reserve_space(xdr, 12);
1205         *p++ = cpu_to_be32(2);
1206         *p++ = cpu_to_be32(bm0);
1207         *p = cpu_to_be32(bm1);
1208 }
1209
1210 static void
1211 encode_getattr_three(struct xdr_stream *xdr,
1212                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1213                      struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216
1217         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218         if (bm2) {
1219                 p = reserve_space(xdr, 16);
1220                 *p++ = cpu_to_be32(3);
1221                 *p++ = cpu_to_be32(bm0);
1222                 *p++ = cpu_to_be32(bm1);
1223                 *p = cpu_to_be32(bm2);
1224         } else if (bm1) {
1225                 p = reserve_space(xdr, 12);
1226                 *p++ = cpu_to_be32(2);
1227                 *p++ = cpu_to_be32(bm0);
1228                 *p = cpu_to_be32(bm1);
1229         } else {
1230                 p = reserve_space(xdr, 8);
1231                 *p++ = cpu_to_be32(1);
1232                 *p = cpu_to_be32(bm0);
1233         }
1234 }
1235
1236 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1237 {
1238         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1239                            bitmask[1] & nfs4_fattr_bitmap[1],
1240                            bitmask[2] & nfs4_fattr_bitmap[2],
1241                            hdr);
1242 }
1243
1244 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1245                                  const u32 *open_bitmap,
1246                                  struct compound_hdr *hdr)
1247 {
1248         encode_getattr_three(xdr,
1249                              bitmask[0] & open_bitmap[0],
1250                              bitmask[1] & open_bitmap[1],
1251                              bitmask[2] & open_bitmap[2],
1252                              hdr);
1253 }
1254
1255 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1256 {
1257         encode_getattr_three(xdr,
1258                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1259                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1260                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1261                              hdr);
1262 }
1263
1264 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1265 {
1266         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1267                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1268 }
1269
1270 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1271 {
1272         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1273 }
1274
1275 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1276 {
1277         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1278         encode_string(xdr, name->len, name->name);
1279 }
1280
1281 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1282 {
1283         if (fl->fl_type == F_RDLCK)
1284                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1285         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1286 }
1287
1288 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1289 {
1290         if (fl->fl_end == OFFSET_MAX)
1291                 return ~(uint64_t)0;
1292         return fl->fl_end - fl->fl_start + 1;
1293 }
1294
1295 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1296 {
1297         __be32 *p;
1298
1299         p = reserve_space(xdr, 32);
1300         p = xdr_encode_hyper(p, lowner->clientid);
1301         *p++ = cpu_to_be32(20);
1302         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1303         *p++ = cpu_to_be32(lowner->s_dev);
1304         xdr_encode_hyper(p, lowner->id);
1305 }
1306
1307 /*
1308  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1309  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1310  */
1311 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1312 {
1313         __be32 *p;
1314
1315         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1316         p = reserve_space(xdr, 28);
1317         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1318         *p++ = cpu_to_be32(args->reclaim);
1319         p = xdr_encode_hyper(p, args->fl->fl_start);
1320         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321         *p = cpu_to_be32(args->new_lock_owner);
1322         if (args->new_lock_owner){
1323                 encode_nfs4_seqid(xdr, args->open_seqid);
1324                 encode_nfs4_stateid(xdr, &args->open_stateid);
1325                 encode_nfs4_seqid(xdr, args->lock_seqid);
1326                 encode_lockowner(xdr, &args->lock_owner);
1327         }
1328         else {
1329                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1330                 encode_nfs4_seqid(xdr, args->lock_seqid);
1331         }
1332 }
1333
1334 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1335 {
1336         __be32 *p;
1337
1338         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1339         p = reserve_space(xdr, 20);
1340         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1341         p = xdr_encode_hyper(p, args->fl->fl_start);
1342         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1343         encode_lockowner(xdr, &args->lock_owner);
1344 }
1345
1346 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1347 {
1348         __be32 *p;
1349
1350         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1351         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1352         encode_nfs4_seqid(xdr, args->seqid);
1353         encode_nfs4_stateid(xdr, &args->stateid);
1354         p = reserve_space(xdr, 16);
1355         p = xdr_encode_hyper(p, args->fl->fl_start);
1356         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357 }
1358
1359 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1360 {
1361         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1362         encode_lockowner(xdr, lowner);
1363 }
1364
1365 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1366 {
1367         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1368         encode_string(xdr, name->len, name->name);
1369 }
1370
1371 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1372 {
1373         __be32 *p;
1374
1375         p = reserve_space(xdr, 8);
1376         *p++ = cpu_to_be32(share_access);
1377         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1378 }
1379
1380 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1381 {
1382         __be32 *p;
1383  /*
1384  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1385  * owner 4 = 32
1386  */
1387         encode_nfs4_seqid(xdr, arg->seqid);
1388         encode_share_access(xdr, arg->share_access);
1389         p = reserve_space(xdr, 36);
1390         p = xdr_encode_hyper(p, arg->clientid);
1391         *p++ = cpu_to_be32(24);
1392         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1393         *p++ = cpu_to_be32(arg->server->s_dev);
1394         *p++ = cpu_to_be32(arg->id.uniquifier);
1395         xdr_encode_hyper(p, arg->id.create_time);
1396 }
1397
1398 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch(arg->createmode) {
1404         case NFS4_CREATE_UNCHECKED:
1405                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1406                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1407                                 arg->server, arg->server->attr_bitmask);
1408                 break;
1409         case NFS4_CREATE_GUARDED:
1410                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1411                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1412                                 arg->server, arg->server->attr_bitmask);
1413                 break;
1414         case NFS4_CREATE_EXCLUSIVE:
1415                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1416                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1417                 break;
1418         case NFS4_CREATE_EXCLUSIVE4_1:
1419                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1420                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1421                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1422                                 arg->server, arg->server->exclcreat_bitmask);
1423         }
1424 }
1425
1426 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1427 {
1428         __be32 *p;
1429
1430         p = reserve_space(xdr, 4);
1431         switch (arg->open_flags & O_CREAT) {
1432         case 0:
1433                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1434                 break;
1435         default:
1436                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1437                 encode_createmode(xdr, arg);
1438         }
1439 }
1440
1441 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1442 {
1443         __be32 *p;
1444
1445         p = reserve_space(xdr, 4);
1446         switch (delegation_type) {
1447         case 0:
1448                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1449                 break;
1450         case FMODE_READ:
1451                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1452                 break;
1453         case FMODE_WRITE|FMODE_READ:
1454                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1455                 break;
1456         default:
1457                 BUG();
1458         }
1459 }
1460
1461 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1462 {
1463         __be32 *p;
1464
1465         p = reserve_space(xdr, 4);
1466         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1467         encode_string(xdr, name->len, name->name);
1468 }
1469
1470 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 4);
1475         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1476         encode_delegation_type(xdr, type);
1477 }
1478
1479 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4);
1484         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1485         encode_nfs4_stateid(xdr, stateid);
1486         encode_string(xdr, name->len, name->name);
1487 }
1488
1489 static inline void encode_claim_fh(struct xdr_stream *xdr)
1490 {
1491         __be32 *p;
1492
1493         p = reserve_space(xdr, 4);
1494         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1495 }
1496
1497 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1498 {
1499         __be32 *p;
1500
1501         p = reserve_space(xdr, 4);
1502         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1503         encode_nfs4_stateid(xdr, stateid);
1504 }
1505
1506 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1507 {
1508         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1509         encode_openhdr(xdr, arg);
1510         encode_opentype(xdr, arg);
1511         switch (arg->claim) {
1512         case NFS4_OPEN_CLAIM_NULL:
1513                 encode_claim_null(xdr, arg->name);
1514                 break;
1515         case NFS4_OPEN_CLAIM_PREVIOUS:
1516                 encode_claim_previous(xdr, arg->u.delegation_type);
1517                 break;
1518         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1519                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1520                 break;
1521         case NFS4_OPEN_CLAIM_FH:
1522                 encode_claim_fh(xdr);
1523                 break;
1524         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1525                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1526                 break;
1527         default:
1528                 BUG();
1529         }
1530 }
1531
1532 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1533 {
1534         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1535         encode_nfs4_stateid(xdr, arg->stateid);
1536         encode_nfs4_seqid(xdr, arg->seqid);
1537 }
1538
1539 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1540 {
1541         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1542         encode_nfs4_stateid(xdr, &arg->stateid);
1543         encode_nfs4_seqid(xdr, arg->seqid);
1544         encode_share_access(xdr, arg->share_access);
1545 }
1546
1547 static void
1548 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1549 {
1550         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1551         encode_string(xdr, fh->size, fh->data);
1552 }
1553
1554 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1555 {
1556         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1557 }
1558
1559 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1560                         struct compound_hdr *hdr)
1561 {
1562         __be32 *p;
1563
1564         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1565         encode_nfs4_stateid(xdr, &args->stateid);
1566
1567         p = reserve_space(xdr, 12);
1568         p = xdr_encode_hyper(p, args->offset);
1569         *p = cpu_to_be32(args->count);
1570 }
1571
1572 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1573 {
1574         uint32_t attrs[3] = {
1575                 FATTR4_WORD0_RDATTR_ERROR,
1576                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1577         };
1578         uint32_t dircount = readdir->count >> 1;
1579         __be32 *p, verf[2];
1580         uint32_t attrlen = 0;
1581         unsigned int i;
1582
1583         if (readdir->plus) {
1584                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1585                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1586                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1587                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1588                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1589                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1590                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1591                 dircount >>= 1;
1592         }
1593         /* Use mounted_on_fileid only if the server supports it */
1594         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1595                 attrs[0] |= FATTR4_WORD0_FILEID;
1596         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1597                 attrs[i] &= readdir->bitmask[i];
1598                 if (attrs[i] != 0)
1599                         attrlen = i+1;
1600         }
1601
1602         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1603         encode_uint64(xdr, readdir->cookie);
1604         encode_nfs4_verifier(xdr, &readdir->verifier);
1605         p = reserve_space(xdr, 12 + (attrlen << 2));
1606         *p++ = cpu_to_be32(dircount);
1607         *p++ = cpu_to_be32(readdir->count);
1608         *p++ = cpu_to_be32(attrlen);
1609         for (i = 0; i < attrlen; i++)
1610                 *p++ = cpu_to_be32(attrs[i]);
1611         memcpy(verf, readdir->verifier.data, sizeof(verf));
1612
1613         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1614                         __func__,
1615                         (unsigned long long)readdir->cookie,
1616                         verf[0], verf[1],
1617                         attrs[0] & readdir->bitmask[0],
1618                         attrs[1] & readdir->bitmask[1],
1619                         attrs[2] & readdir->bitmask[2]);
1620 }
1621
1622 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1623 {
1624         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1625 }
1626
1627 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1628 {
1629         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1630         encode_string(xdr, name->len, name->name);
1631 }
1632
1633 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1634 {
1635         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1636         encode_string(xdr, oldname->len, oldname->name);
1637         encode_string(xdr, newname->len, newname->name);
1638 }
1639
1640 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1641                          struct compound_hdr *hdr)
1642 {
1643         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1644         encode_uint64(xdr, clid);
1645 }
1646
1647 static void
1648 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1649 {
1650         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1651 }
1652
1653 static void
1654 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1655                 struct compound_hdr *hdr)
1656 {
1657         __be32 *p;
1658
1659         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1660         encode_nfs4_stateid(xdr, &zero_stateid);
1661         p = reserve_space(xdr, 2*4);
1662         *p++ = cpu_to_be32(1);
1663         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1664         p = reserve_space(xdr, 4);
1665         *p = cpu_to_be32(arg->acl_len);
1666         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1667 }
1668
1669 static void
1670 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1671 {
1672         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1673 }
1674
1675 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1676 {
1677         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1678         encode_nfs4_stateid(xdr, &arg->stateid);
1679         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1680                         server->attr_bitmask);
1681 }
1682
1683 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1684 {
1685         __be32 *p;
1686
1687         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1688         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1689
1690         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1691                         setclientid->sc_clnt->cl_owner_id);
1692         p = reserve_space(xdr, 4);
1693         *p = cpu_to_be32(setclientid->sc_prog);
1694         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1695         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1696         p = reserve_space(xdr, 4);
1697         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1698 }
1699
1700 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1701 {
1702         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1703                         decode_setclientid_confirm_maxsz, hdr);
1704         encode_uint64(xdr, arg->clientid);
1705         encode_nfs4_verifier(xdr, &arg->confirm);
1706 }
1707
1708 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1709                          struct compound_hdr *hdr)
1710 {
1711         __be32 *p;
1712
1713         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1714         encode_nfs4_stateid(xdr, &args->stateid);
1715
1716         p = reserve_space(xdr, 16);
1717         p = xdr_encode_hyper(p, args->offset);
1718         *p++ = cpu_to_be32(args->stable);
1719         *p = cpu_to_be32(args->count);
1720
1721         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1722 }
1723
1724 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1725 {
1726         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1727         encode_nfs4_stateid(xdr, stateid);
1728 }
1729
1730 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1731 {
1732         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1733         encode_string(xdr, name->len, name->name);
1734 }
1735
1736 #if defined(CONFIG_NFS_V4_1)
1737 /* NFSv4.1 operations */
1738 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1739                                    const struct nfs41_bind_conn_to_session_args *args,
1740                                    struct compound_hdr *hdr)
1741 {
1742         __be32 *p;
1743
1744         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1745                 decode_bind_conn_to_session_maxsz, hdr);
1746         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1747         p = xdr_reserve_space(xdr, 8);
1748         *p++ = cpu_to_be32(args->dir);
1749         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1750 }
1751
1752 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1753 {
1754         unsigned int i;
1755         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1756         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1757                 encode_uint32(xdr, op_map->u.words[i]);
1758 }
1759
1760 static void encode_exchange_id(struct xdr_stream *xdr,
1761                                const struct nfs41_exchange_id_args *args,
1762                                struct compound_hdr *hdr)
1763 {
1764         __be32 *p;
1765         char impl_name[IMPL_NAME_LIMIT];
1766         int len = 0;
1767
1768         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1769         encode_nfs4_verifier(xdr, args->verifier);
1770
1771         encode_string(xdr, strlen(args->client->cl_owner_id),
1772                         args->client->cl_owner_id);
1773
1774         encode_uint32(xdr, args->flags);
1775         encode_uint32(xdr, args->state_protect.how);
1776
1777         switch (args->state_protect.how) {
1778         case SP4_NONE:
1779                 break;
1780         case SP4_MACH_CRED:
1781                 encode_op_map(xdr, &args->state_protect.enforce);
1782                 encode_op_map(xdr, &args->state_protect.allow);
1783                 break;
1784         default:
1785                 WARN_ON_ONCE(1);
1786                 break;
1787         }
1788
1789         if (send_implementation_id &&
1790             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1791             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1792                 <= sizeof(impl_name) + 1)
1793                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1794                                utsname()->sysname, utsname()->release,
1795                                utsname()->version, utsname()->machine);
1796
1797         if (len > 0) {
1798                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1799
1800                 encode_string(xdr,
1801                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1802                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1803                 encode_string(xdr, len, impl_name);
1804                 /* just send zeros for nii_date - the date is in nii_name */
1805                 p = reserve_space(xdr, 12);
1806                 p = xdr_encode_hyper(p, 0);
1807                 *p = cpu_to_be32(0);
1808         } else
1809                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1810 }
1811
1812 static void encode_create_session(struct xdr_stream *xdr,
1813                                   const struct nfs41_create_session_args *args,
1814                                   struct compound_hdr *hdr)
1815 {
1816         __be32 *p;
1817         struct nfs_client *clp = args->client;
1818         struct rpc_clnt *clnt = clp->cl_rpcclient;
1819         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1820         u32 max_resp_sz_cached;
1821
1822         /*
1823          * Assumes OPEN is the biggest non-idempotent compound.
1824          * 2 is the verifier.
1825          */
1826         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1827                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1828
1829         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1830         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1831         p = xdr_encode_hyper(p, args->clientid);
1832         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1833         *p++ = cpu_to_be32(args->flags);                        /*flags */
1834
1835         /* Fore Channel */
1836         *p++ = cpu_to_be32(0);                          /* header padding size */
1837         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1838         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1839         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1840         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1841         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1842         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1843
1844         /* Back Channel */
1845         *p++ = cpu_to_be32(0);                          /* header padding size */
1846         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1847         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1848         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1849         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1850         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1851         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1852
1853         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1854         *p++ = cpu_to_be32(1);
1855         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1856
1857         /* authsys_parms rfc1831 */
1858         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1859         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1860         *p++ = cpu_to_be32(0);                          /* UID */
1861         *p++ = cpu_to_be32(0);                          /* GID */
1862         *p = cpu_to_be32(0);                            /* No more gids */
1863 }
1864
1865 static void encode_destroy_session(struct xdr_stream *xdr,
1866                                    const struct nfs4_session *session,
1867                                    struct compound_hdr *hdr)
1868 {
1869         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1870         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1871 }
1872
1873 static void encode_destroy_clientid(struct xdr_stream *xdr,
1874                                    uint64_t clientid,
1875                                    struct compound_hdr *hdr)
1876 {
1877         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1878         encode_uint64(xdr, clientid);
1879 }
1880
1881 static void encode_reclaim_complete(struct xdr_stream *xdr,
1882                                     const struct nfs41_reclaim_complete_args *args,
1883                                     struct compound_hdr *hdr)
1884 {
1885         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1886         encode_uint32(xdr, args->one_fs);
1887 }
1888 #endif /* CONFIG_NFS_V4_1 */
1889
1890 static void encode_sequence(struct xdr_stream *xdr,
1891                             const struct nfs4_sequence_args *args,
1892                             struct compound_hdr *hdr)
1893 {
1894 #if defined(CONFIG_NFS_V4_1)
1895         struct nfs4_session *session;
1896         struct nfs4_slot_table *tp;
1897         struct nfs4_slot *slot = args->sa_slot;
1898         __be32 *p;
1899
1900         tp = slot->table;
1901         session = tp->session;
1902         if (!session)
1903                 return;
1904
1905         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1906
1907         /*
1908          * Sessionid + seqid + slotid + max slotid + cache_this
1909          */
1910         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1911                 "max_slotid=%d cache_this=%d\n",
1912                 __func__,
1913                 ((u32 *)session->sess_id.data)[0],
1914                 ((u32 *)session->sess_id.data)[1],
1915                 ((u32 *)session->sess_id.data)[2],
1916                 ((u32 *)session->sess_id.data)[3],
1917                 slot->seq_nr, slot->slot_nr,
1918                 tp->highest_used_slotid, args->sa_cache_this);
1919         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1920         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1921         *p++ = cpu_to_be32(slot->seq_nr);
1922         *p++ = cpu_to_be32(slot->slot_nr);
1923         *p++ = cpu_to_be32(tp->highest_used_slotid);
1924         *p = cpu_to_be32(args->sa_cache_this);
1925 #endif /* CONFIG_NFS_V4_1 */
1926 }
1927
1928 #ifdef CONFIG_NFS_V4_1
1929 static void
1930 encode_getdeviceinfo(struct xdr_stream *xdr,
1931                      const struct nfs4_getdeviceinfo_args *args,
1932                      struct compound_hdr *hdr)
1933 {
1934         __be32 *p;
1935
1936         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1937         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1938         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1939                                     NFS4_DEVICEID4_SIZE);
1940         *p++ = cpu_to_be32(args->pdev->layout_type);
1941         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1942
1943         p = reserve_space(xdr, 4 + 4);
1944         *p++ = cpu_to_be32(1);                  /* bitmap length */
1945         *p++ = cpu_to_be32(args->notify_types);
1946 }
1947
1948 static void
1949 encode_layoutget(struct xdr_stream *xdr,
1950                       const struct nfs4_layoutget_args *args,
1951                       struct compound_hdr *hdr)
1952 {
1953         __be32 *p;
1954
1955         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1956         p = reserve_space(xdr, 36);
1957         *p++ = cpu_to_be32(0);     /* Signal layout available */
1958         *p++ = cpu_to_be32(args->type);
1959         *p++ = cpu_to_be32(args->range.iomode);
1960         p = xdr_encode_hyper(p, args->range.offset);
1961         p = xdr_encode_hyper(p, args->range.length);
1962         p = xdr_encode_hyper(p, args->minlength);
1963         encode_nfs4_stateid(xdr, &args->stateid);
1964         encode_uint32(xdr, args->maxcount);
1965
1966         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1967                 __func__,
1968                 args->type,
1969                 args->range.iomode,
1970                 (unsigned long)args->range.offset,
1971                 (unsigned long)args->range.length,
1972                 args->maxcount);
1973 }
1974
1975 static int
1976 encode_layoutcommit(struct xdr_stream *xdr,
1977                     struct inode *inode,
1978                     const struct nfs4_layoutcommit_args *args,
1979                     struct compound_hdr *hdr)
1980 {
1981         __be32 *p;
1982
1983         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1984                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1985
1986         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1987         p = reserve_space(xdr, 20);
1988         /* Only whole file layouts */
1989         p = xdr_encode_hyper(p, 0); /* offset */
1990         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1991         *p = cpu_to_be32(0); /* reclaim */
1992         encode_nfs4_stateid(xdr, &args->stateid);
1993         if (args->lastbytewritten != U64_MAX) {
1994                 p = reserve_space(xdr, 20);
1995                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1996                 p = xdr_encode_hyper(p, args->lastbytewritten);
1997         } else {
1998                 p = reserve_space(xdr, 12);
1999                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2000         }
2001         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2002         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2003
2004         encode_uint32(xdr, args->layoutupdate_len);
2005         if (args->layoutupdate_pages)
2006                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2007                                 args->layoutupdate_len);
2008
2009         return 0;
2010 }
2011
2012 static void
2013 encode_layoutreturn(struct xdr_stream *xdr,
2014                     const struct nfs4_layoutreturn_args *args,
2015                     struct compound_hdr *hdr)
2016 {
2017         __be32 *p;
2018
2019         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2020         p = reserve_space(xdr, 16);
2021         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2022         *p++ = cpu_to_be32(args->layout_type);
2023         *p++ = cpu_to_be32(args->range.iomode);
2024         *p = cpu_to_be32(RETURN_FILE);
2025         p = reserve_space(xdr, 16);
2026         p = xdr_encode_hyper(p, args->range.offset);
2027         p = xdr_encode_hyper(p, args->range.length);
2028         spin_lock(&args->inode->i_lock);
2029         encode_nfs4_stateid(xdr, &args->stateid);
2030         spin_unlock(&args->inode->i_lock);
2031         if (args->ld_private->ops && args->ld_private->ops->encode)
2032                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2033         else
2034                 encode_uint32(xdr, 0);
2035 }
2036
2037 static int
2038 encode_secinfo_no_name(struct xdr_stream *xdr,
2039                        const struct nfs41_secinfo_no_name_args *args,
2040                        struct compound_hdr *hdr)
2041 {
2042         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2043         encode_uint32(xdr, args->style);
2044         return 0;
2045 }
2046
2047 static void encode_test_stateid(struct xdr_stream *xdr,
2048                                 const struct nfs41_test_stateid_args *args,
2049                                 struct compound_hdr *hdr)
2050 {
2051         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2052         encode_uint32(xdr, 1);
2053         encode_nfs4_stateid(xdr, args->stateid);
2054 }
2055
2056 static void encode_free_stateid(struct xdr_stream *xdr,
2057                                 const struct nfs41_free_stateid_args *args,
2058                                 struct compound_hdr *hdr)
2059 {
2060         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2061         encode_nfs4_stateid(xdr, &args->stateid);
2062 }
2063 #else
2064 static inline void
2065 encode_layoutreturn(struct xdr_stream *xdr,
2066                     const struct nfs4_layoutreturn_args *args,
2067                     struct compound_hdr *hdr)
2068 {
2069 }
2070 #endif /* CONFIG_NFS_V4_1 */
2071
2072 /*
2073  * END OF "GENERIC" ENCODE ROUTINES.
2074  */
2075
2076 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2077 {
2078 #if defined(CONFIG_NFS_V4_1)
2079         struct nfs4_session *session = args->sa_slot->table->session;
2080         if (session)
2081                 return session->clp->cl_mvops->minor_version;
2082 #endif /* CONFIG_NFS_V4_1 */
2083         return 0;
2084 }
2085
2086 /*
2087  * Encode an ACCESS request
2088  */
2089 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2090                                 const void *data)
2091 {
2092         const struct nfs4_accessargs *args = data;
2093         struct compound_hdr hdr = {
2094                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2095         };
2096
2097         encode_compound_hdr(xdr, req, &hdr);
2098         encode_sequence(xdr, &args->seq_args, &hdr);
2099         encode_putfh(xdr, args->fh, &hdr);
2100         encode_access(xdr, args->access, &hdr);
2101         encode_getfattr(xdr, args->bitmask, &hdr);
2102         encode_nops(&hdr);
2103 }
2104
2105 /*
2106  * Encode LOOKUP request
2107  */
2108 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2109                                 const void *data)
2110 {
2111         const struct nfs4_lookup_arg *args = data;
2112         struct compound_hdr hdr = {
2113                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114         };
2115
2116         encode_compound_hdr(xdr, req, &hdr);
2117         encode_sequence(xdr, &args->seq_args, &hdr);
2118         encode_putfh(xdr, args->dir_fh, &hdr);
2119         encode_lookup(xdr, args->name, &hdr);
2120         encode_getfh(xdr, &hdr);
2121         encode_getfattr(xdr, args->bitmask, &hdr);
2122         encode_nops(&hdr);
2123 }
2124
2125 /*
2126  * Encode LOOKUP_ROOT request
2127  */
2128 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2129                                      struct xdr_stream *xdr,
2130                                      const void *data)
2131 {
2132         const struct nfs4_lookup_root_arg *args = data;
2133         struct compound_hdr hdr = {
2134                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135         };
2136
2137         encode_compound_hdr(xdr, req, &hdr);
2138         encode_sequence(xdr, &args->seq_args, &hdr);
2139         encode_putrootfh(xdr, &hdr);
2140         encode_getfh(xdr, &hdr);
2141         encode_getfattr(xdr, args->bitmask, &hdr);
2142         encode_nops(&hdr);
2143 }
2144
2145 /*
2146  * Encode REMOVE request
2147  */
2148 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2149                                 const void *data)
2150 {
2151         const struct nfs_removeargs *args = data;
2152         struct compound_hdr hdr = {
2153                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2154         };
2155
2156         encode_compound_hdr(xdr, req, &hdr);
2157         encode_sequence(xdr, &args->seq_args, &hdr);
2158         encode_putfh(xdr, args->fh, &hdr);
2159         encode_remove(xdr, &args->name, &hdr);
2160         encode_nops(&hdr);
2161 }
2162
2163 /*
2164  * Encode RENAME request
2165  */
2166 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2167                                 const void *data)
2168 {
2169         const struct nfs_renameargs *args = data;
2170         struct compound_hdr hdr = {
2171                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172         };
2173
2174         encode_compound_hdr(xdr, req, &hdr);
2175         encode_sequence(xdr, &args->seq_args, &hdr);
2176         encode_putfh(xdr, args->old_dir, &hdr);
2177         encode_savefh(xdr, &hdr);
2178         encode_putfh(xdr, args->new_dir, &hdr);
2179         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2180         encode_nops(&hdr);
2181 }
2182
2183 /*
2184  * Encode LINK request
2185  */
2186 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2187                               const void *data)
2188 {
2189         const struct nfs4_link_arg *args = data;
2190         struct compound_hdr hdr = {
2191                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2192         };
2193
2194         encode_compound_hdr(xdr, req, &hdr);
2195         encode_sequence(xdr, &args->seq_args, &hdr);
2196         encode_putfh(xdr, args->fh, &hdr);
2197         encode_savefh(xdr, &hdr);
2198         encode_putfh(xdr, args->dir_fh, &hdr);
2199         encode_link(xdr, args->name, &hdr);
2200         encode_restorefh(xdr, &hdr);
2201         encode_getfattr(xdr, args->bitmask, &hdr);
2202         encode_nops(&hdr);
2203 }
2204
2205 /*
2206  * Encode CREATE request
2207  */
2208 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2209                                 const void *data)
2210 {
2211         const struct nfs4_create_arg *args = data;
2212         struct compound_hdr hdr = {
2213                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2214         };
2215
2216         encode_compound_hdr(xdr, req, &hdr);
2217         encode_sequence(xdr, &args->seq_args, &hdr);
2218         encode_putfh(xdr, args->dir_fh, &hdr);
2219         encode_create(xdr, args, &hdr);
2220         encode_getfh(xdr, &hdr);
2221         encode_getfattr(xdr, args->bitmask, &hdr);
2222         encode_nops(&hdr);
2223 }
2224
2225 /*
2226  * Encode SYMLINK request
2227  */
2228 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2229                                  const void *data)
2230 {
2231         const struct nfs4_create_arg *args = data;
2232
2233         nfs4_xdr_enc_create(req, xdr, args);
2234 }
2235
2236 /*
2237  * Encode GETATTR request
2238  */
2239 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2240                                  const void *data)
2241 {
2242         const struct nfs4_getattr_arg *args = data;
2243         struct compound_hdr hdr = {
2244                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2245         };
2246
2247         encode_compound_hdr(xdr, req, &hdr);
2248         encode_sequence(xdr, &args->seq_args, &hdr);
2249         encode_putfh(xdr, args->fh, &hdr);
2250         encode_getfattr(xdr, args->bitmask, &hdr);
2251         encode_nops(&hdr);
2252 }
2253
2254 /*
2255  * Encode a CLOSE request
2256  */
2257 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2258                                const void *data)
2259 {
2260         const struct nfs_closeargs *args = data;
2261         struct compound_hdr hdr = {
2262                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2263         };
2264
2265         encode_compound_hdr(xdr, req, &hdr);
2266         encode_sequence(xdr, &args->seq_args, &hdr);
2267         encode_putfh(xdr, args->fh, &hdr);
2268         if (args->lr_args)
2269                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2270         if (args->bitmask != NULL)
2271                 encode_getfattr(xdr, args->bitmask, &hdr);
2272         encode_close(xdr, args, &hdr);
2273         encode_nops(&hdr);
2274 }
2275
2276 /*
2277  * Encode an OPEN request
2278  */
2279 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2280                               const void *data)
2281 {
2282         const struct nfs_openargs *args = data;
2283         struct compound_hdr hdr = {
2284                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2285         };
2286
2287         encode_compound_hdr(xdr, req, &hdr);
2288         encode_sequence(xdr, &args->seq_args, &hdr);
2289         encode_putfh(xdr, args->fh, &hdr);
2290         encode_open(xdr, args, &hdr);
2291         encode_getfh(xdr, &hdr);
2292         if (args->access)
2293                 encode_access(xdr, args->access, &hdr);
2294         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2295         encode_nops(&hdr);
2296 }
2297
2298 /*
2299  * Encode an OPEN_CONFIRM request
2300  */
2301 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2302                                       struct xdr_stream *xdr,
2303                                       const void *data)
2304 {
2305         const struct nfs_open_confirmargs *args = data;
2306         struct compound_hdr hdr = {
2307                 .nops   = 0,
2308         };
2309
2310         encode_compound_hdr(xdr, req, &hdr);
2311         encode_putfh(xdr, args->fh, &hdr);
2312         encode_open_confirm(xdr, args, &hdr);
2313         encode_nops(&hdr);
2314 }
2315
2316 /*
2317  * Encode an OPEN request with no attributes.
2318  */
2319 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2320                                      struct xdr_stream *xdr,
2321                                      const void *data)
2322 {
2323         const struct nfs_openargs *args = data;
2324         struct compound_hdr hdr = {
2325                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2326         };
2327
2328         encode_compound_hdr(xdr, req, &hdr);
2329         encode_sequence(xdr, &args->seq_args, &hdr);
2330         encode_putfh(xdr, args->fh, &hdr);
2331         encode_open(xdr, args, &hdr);
2332         if (args->access)
2333                 encode_access(xdr, args->access, &hdr);
2334         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2335         encode_nops(&hdr);
2336 }
2337
2338 /*
2339  * Encode an OPEN_DOWNGRADE request
2340  */
2341 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2342                                         struct xdr_stream *xdr,
2343                                         const void *data)
2344 {
2345         const struct nfs_closeargs *args = data;
2346         struct compound_hdr hdr = {
2347                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2348         };
2349
2350         encode_compound_hdr(xdr, req, &hdr);
2351         encode_sequence(xdr, &args->seq_args, &hdr);
2352         encode_putfh(xdr, args->fh, &hdr);
2353         if (args->lr_args)
2354                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2355         encode_open_downgrade(xdr, args, &hdr);
2356         encode_nops(&hdr);
2357 }
2358
2359 /*
2360  * Encode a LOCK request
2361  */
2362 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2363                               const void *data)
2364 {
2365         const struct nfs_lock_args *args = data;
2366         struct compound_hdr hdr = {
2367                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368         };
2369
2370         encode_compound_hdr(xdr, req, &hdr);
2371         encode_sequence(xdr, &args->seq_args, &hdr);
2372         encode_putfh(xdr, args->fh, &hdr);
2373         encode_lock(xdr, args, &hdr);
2374         encode_nops(&hdr);
2375 }
2376
2377 /*
2378  * Encode a LOCKT request
2379  */
2380 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2381                                const void *data)
2382 {
2383         const struct nfs_lockt_args *args = data;
2384         struct compound_hdr hdr = {
2385                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2386         };
2387
2388         encode_compound_hdr(xdr, req, &hdr);
2389         encode_sequence(xdr, &args->seq_args, &hdr);
2390         encode_putfh(xdr, args->fh, &hdr);
2391         encode_lockt(xdr, args, &hdr);
2392         encode_nops(&hdr);
2393 }
2394
2395 /*
2396  * Encode a LOCKU request
2397  */
2398 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2399                                const void *data)
2400 {
2401         const struct nfs_locku_args *args = data;
2402         struct compound_hdr hdr = {
2403                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2404         };
2405
2406         encode_compound_hdr(xdr, req, &hdr);
2407         encode_sequence(xdr, &args->seq_args, &hdr);
2408         encode_putfh(xdr, args->fh, &hdr);
2409         encode_locku(xdr, args, &hdr);
2410         encode_nops(&hdr);
2411 }
2412
2413 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2414                                            struct xdr_stream *xdr,
2415                                            const void *data)
2416 {
2417         const struct nfs_release_lockowner_args *args = data;
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 void *data)
2432 {
2433         const struct nfs4_readlink *args = data;
2434         struct compound_hdr hdr = {
2435                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2436         };
2437
2438         encode_compound_hdr(xdr, req, &hdr);
2439         encode_sequence(xdr, &args->seq_args, &hdr);
2440         encode_putfh(xdr, args->fh, &hdr);
2441         encode_readlink(xdr, args, req, &hdr);
2442
2443         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2444                         args->pgbase, args->pglen);
2445         encode_nops(&hdr);
2446 }
2447
2448 /*
2449  * Encode a READDIR request
2450  */
2451 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2452                                  const void *data)
2453 {
2454         const struct nfs4_readdir_arg *args = data;
2455         struct compound_hdr hdr = {
2456                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2457         };
2458
2459         encode_compound_hdr(xdr, req, &hdr);
2460         encode_sequence(xdr, &args->seq_args, &hdr);
2461         encode_putfh(xdr, args->fh, &hdr);
2462         encode_readdir(xdr, args, req, &hdr);
2463
2464         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2465                          args->pgbase, args->count);
2466         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2467                         __func__, hdr.replen << 2, args->pages,
2468                         args->pgbase, args->count);
2469         encode_nops(&hdr);
2470 }
2471
2472 /*
2473  * Encode a READ request
2474  */
2475 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2476                               const void *data)
2477 {
2478         const struct nfs_pgio_args *args = data;
2479         struct compound_hdr hdr = {
2480                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2481         };
2482
2483         encode_compound_hdr(xdr, req, &hdr);
2484         encode_sequence(xdr, &args->seq_args, &hdr);
2485         encode_putfh(xdr, args->fh, &hdr);
2486         encode_read(xdr, args, &hdr);
2487
2488         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2489                          args->pages, args->pgbase, args->count);
2490         req->rq_rcv_buf.flags |= XDRBUF_READ;
2491         encode_nops(&hdr);
2492 }
2493
2494 /*
2495  * Encode an SETATTR request
2496  */
2497 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2498                                  const void *data)
2499 {
2500         const struct nfs_setattrargs *args = data;
2501         struct compound_hdr hdr = {
2502                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503         };
2504
2505         encode_compound_hdr(xdr, req, &hdr);
2506         encode_sequence(xdr, &args->seq_args, &hdr);
2507         encode_putfh(xdr, args->fh, &hdr);
2508         encode_setattr(xdr, args, args->server, &hdr);
2509         encode_getfattr(xdr, args->bitmask, &hdr);
2510         encode_nops(&hdr);
2511 }
2512
2513 /*
2514  * Encode a GETACL request
2515  */
2516 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                 const void *data)
2518 {
2519         const struct nfs_getaclargs *args = data;
2520         struct compound_hdr hdr = {
2521                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2522         };
2523         uint32_t replen;
2524
2525         encode_compound_hdr(xdr, req, &hdr);
2526         encode_sequence(xdr, &args->seq_args, &hdr);
2527         encode_putfh(xdr, args->fh, &hdr);
2528         replen = hdr.replen + op_decode_hdr_maxsz;
2529         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2530
2531         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2532                 args->acl_pages, 0, args->acl_len);
2533
2534         encode_nops(&hdr);
2535 }
2536
2537 /*
2538  * Encode a WRITE request
2539  */
2540 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2541                                const void *data)
2542 {
2543         const struct nfs_pgio_args *args = data;
2544         struct compound_hdr hdr = {
2545                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2546         };
2547
2548         encode_compound_hdr(xdr, req, &hdr);
2549         encode_sequence(xdr, &args->seq_args, &hdr);
2550         encode_putfh(xdr, args->fh, &hdr);
2551         encode_write(xdr, args, &hdr);
2552         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2553         if (args->bitmask)
2554                 encode_getfattr(xdr, args->bitmask, &hdr);
2555         encode_nops(&hdr);
2556 }
2557
2558 /*
2559  *  a COMMIT request
2560  */
2561 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2562                                 const void *data)
2563 {
2564         const struct nfs_commitargs *args = data;
2565         struct compound_hdr hdr = {
2566                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2567         };
2568
2569         encode_compound_hdr(xdr, req, &hdr);
2570         encode_sequence(xdr, &args->seq_args, &hdr);
2571         encode_putfh(xdr, args->fh, &hdr);
2572         encode_commit(xdr, args, &hdr);
2573         encode_nops(&hdr);
2574 }
2575
2576 /*
2577  * FSINFO request
2578  */
2579 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2580                                 const void *data)
2581 {
2582         const struct nfs4_fsinfo_arg *args = data;
2583         struct compound_hdr hdr = {
2584                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2585         };
2586
2587         encode_compound_hdr(xdr, req, &hdr);
2588         encode_sequence(xdr, &args->seq_args, &hdr);
2589         encode_putfh(xdr, args->fh, &hdr);
2590         encode_fsinfo(xdr, args->bitmask, &hdr);
2591         encode_nops(&hdr);
2592 }
2593
2594 /*
2595  * a PATHCONF request
2596  */
2597 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2598                                   const void *data)
2599 {
2600         const struct nfs4_pathconf_arg *args = data;
2601         struct compound_hdr hdr = {
2602                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2603         };
2604
2605         encode_compound_hdr(xdr, req, &hdr);
2606         encode_sequence(xdr, &args->seq_args, &hdr);
2607         encode_putfh(xdr, args->fh, &hdr);
2608         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2609                            &hdr);
2610         encode_nops(&hdr);
2611 }
2612
2613 /*
2614  * a STATFS request
2615  */
2616 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2617                                 const void *data)
2618 {
2619         const struct nfs4_statfs_arg *args = data;
2620         struct compound_hdr hdr = {
2621                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2622         };
2623
2624         encode_compound_hdr(xdr, req, &hdr);
2625         encode_sequence(xdr, &args->seq_args, &hdr);
2626         encode_putfh(xdr, args->fh, &hdr);
2627         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2628                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2629         encode_nops(&hdr);
2630 }
2631
2632 /*
2633  * GETATTR_BITMAP request
2634  */
2635 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2636                                      struct xdr_stream *xdr,
2637                                      const void *data)
2638 {
2639         const struct nfs4_server_caps_arg *args = data;
2640         const u32 *bitmask = args->bitmask;
2641         struct compound_hdr hdr = {
2642                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643         };
2644
2645         encode_compound_hdr(xdr, req, &hdr);
2646         encode_sequence(xdr, &args->seq_args, &hdr);
2647         encode_putfh(xdr, args->fhandle, &hdr);
2648         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2649         encode_nops(&hdr);
2650 }
2651
2652 /*
2653  * a RENEW request
2654  */
2655 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2656                                const void *data)
2657
2658 {
2659         const struct nfs_client *clp = data;
2660         struct compound_hdr hdr = {
2661                 .nops   = 0,
2662         };
2663
2664         encode_compound_hdr(xdr, req, &hdr);
2665         encode_renew(xdr, clp->cl_clientid, &hdr);
2666         encode_nops(&hdr);
2667 }
2668
2669 /*
2670  * a SETCLIENTID request
2671  */
2672 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2673                                      struct xdr_stream *xdr,
2674                                      const void *data)
2675 {
2676         const struct nfs4_setclientid *sc = data;
2677         struct compound_hdr hdr = {
2678                 .nops   = 0,
2679         };
2680
2681         encode_compound_hdr(xdr, req, &hdr);
2682         encode_setclientid(xdr, sc, &hdr);
2683         encode_nops(&hdr);
2684 }
2685
2686 /*
2687  * a SETCLIENTID_CONFIRM request
2688  */
2689 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2690                                              struct xdr_stream *xdr,
2691                                              const void *data)
2692 {
2693         const struct nfs4_setclientid_res *arg = data;
2694         struct compound_hdr hdr = {
2695                 .nops   = 0,
2696         };
2697
2698         encode_compound_hdr(xdr, req, &hdr);
2699         encode_setclientid_confirm(xdr, arg, &hdr);
2700         encode_nops(&hdr);
2701 }
2702
2703 /*
2704  * DELEGRETURN request
2705  */
2706 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2707                                      struct xdr_stream *xdr,
2708                                      const void *data)
2709 {
2710         const struct nfs4_delegreturnargs *args = data;
2711         struct compound_hdr hdr = {
2712                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2713         };
2714
2715         encode_compound_hdr(xdr, req, &hdr);
2716         encode_sequence(xdr, &args->seq_args, &hdr);
2717         encode_putfh(xdr, args->fhandle, &hdr);
2718         if (args->lr_args)
2719                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2720         if (args->bitmask)
2721                 encode_getfattr(xdr, args->bitmask, &hdr);
2722         encode_delegreturn(xdr, args->stateid, &hdr);
2723         encode_nops(&hdr);
2724 }
2725
2726 /*
2727  * Encode FS_LOCATIONS request
2728  */
2729 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2730                                       struct xdr_stream *xdr,
2731                                       const void *data)
2732 {
2733         const struct nfs4_fs_locations_arg *args = data;
2734         struct compound_hdr hdr = {
2735                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2736         };
2737         uint32_t replen;
2738
2739         encode_compound_hdr(xdr, req, &hdr);
2740         encode_sequence(xdr, &args->seq_args, &hdr);
2741         if (args->migration) {
2742                 encode_putfh(xdr, args->fh, &hdr);
2743                 replen = hdr.replen;
2744                 encode_fs_locations(xdr, args->bitmask, &hdr);
2745                 if (args->renew)
2746                         encode_renew(xdr, args->clientid, &hdr);
2747         } else {
2748                 encode_putfh(xdr, args->dir_fh, &hdr);
2749                 encode_lookup(xdr, args->name, &hdr);
2750                 replen = hdr.replen;
2751                 encode_fs_locations(xdr, args->bitmask, &hdr);
2752         }
2753
2754         /* Set up reply kvec to capture returned fs_locations array. */
2755         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2756                          (struct page **)&args->page, 0, PAGE_SIZE);
2757         encode_nops(&hdr);
2758 }
2759
2760 /*
2761  * Encode SECINFO request
2762  */
2763 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2764                                 struct xdr_stream *xdr,
2765                                 const void *data)
2766 {
2767         const struct nfs4_secinfo_arg *args = data;
2768         struct compound_hdr hdr = {
2769                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2770         };
2771
2772         encode_compound_hdr(xdr, req, &hdr);
2773         encode_sequence(xdr, &args->seq_args, &hdr);
2774         encode_putfh(xdr, args->dir_fh, &hdr);
2775         encode_secinfo(xdr, args->name, &hdr);
2776         encode_nops(&hdr);
2777 }
2778
2779 /*
2780  * Encode FSID_PRESENT request
2781  */
2782 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2783                                       struct xdr_stream *xdr,
2784                                       const void *data)
2785 {
2786         const struct nfs4_fsid_present_arg *args = data;
2787         struct compound_hdr hdr = {
2788                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2789         };
2790
2791         encode_compound_hdr(xdr, req, &hdr);
2792         encode_sequence(xdr, &args->seq_args, &hdr);
2793         encode_putfh(xdr, args->fh, &hdr);
2794         encode_getfh(xdr, &hdr);
2795         if (args->renew)
2796                 encode_renew(xdr, args->clientid, &hdr);
2797         encode_nops(&hdr);
2798 }
2799
2800 #if defined(CONFIG_NFS_V4_1)
2801 /*
2802  * BIND_CONN_TO_SESSION request
2803  */
2804 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2805                                 struct xdr_stream *xdr,
2806                                 const void *data)
2807 {
2808         const struct nfs41_bind_conn_to_session_args *args = data;
2809         struct compound_hdr hdr = {
2810                 .minorversion = args->client->cl_mvops->minor_version,
2811         };
2812
2813         encode_compound_hdr(xdr, req, &hdr);
2814         encode_bind_conn_to_session(xdr, args, &hdr);
2815         encode_nops(&hdr);
2816 }
2817
2818 /*
2819  * EXCHANGE_ID request
2820  */
2821 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2822                                      struct xdr_stream *xdr,
2823                                      const void *data)
2824 {
2825         const struct nfs41_exchange_id_args *args = data;
2826         struct compound_hdr hdr = {
2827                 .minorversion = args->client->cl_mvops->minor_version,
2828         };
2829
2830         encode_compound_hdr(xdr, req, &hdr);
2831         encode_exchange_id(xdr, args, &hdr);
2832         encode_nops(&hdr);
2833 }
2834
2835 /*
2836  * a CREATE_SESSION request
2837  */
2838 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2839                                         struct xdr_stream *xdr,
2840                                         const void *data)
2841 {
2842         const struct nfs41_create_session_args *args = data;
2843         struct compound_hdr hdr = {
2844                 .minorversion = args->client->cl_mvops->minor_version,
2845         };
2846
2847         encode_compound_hdr(xdr, req, &hdr);
2848         encode_create_session(xdr, args, &hdr);
2849         encode_nops(&hdr);
2850 }
2851
2852 /*
2853  * a DESTROY_SESSION request
2854  */
2855 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2856                                          struct xdr_stream *xdr,
2857                                          const void *data)
2858 {
2859         const struct nfs4_session *session = data;
2860         struct compound_hdr hdr = {
2861                 .minorversion = session->clp->cl_mvops->minor_version,
2862         };
2863
2864         encode_compound_hdr(xdr, req, &hdr);
2865         encode_destroy_session(xdr, session, &hdr);
2866         encode_nops(&hdr);
2867 }
2868
2869 /*
2870  * a DESTROY_CLIENTID request
2871  */
2872 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2873                                          struct xdr_stream *xdr,
2874                                          const void *data)
2875 {
2876         const struct nfs_client *clp = data;
2877         struct compound_hdr hdr = {
2878                 .minorversion = clp->cl_mvops->minor_version,
2879         };
2880
2881         encode_compound_hdr(xdr, req, &hdr);
2882         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2883         encode_nops(&hdr);
2884 }
2885
2886 /*
2887  * a SEQUENCE request
2888  */
2889 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2890                                   const void *data)
2891 {
2892         const struct nfs4_sequence_args *args = data;
2893         struct compound_hdr hdr = {
2894                 .minorversion = nfs4_xdr_minorversion(args),
2895         };
2896
2897         encode_compound_hdr(xdr, req, &hdr);
2898         encode_sequence(xdr, args, &hdr);
2899         encode_nops(&hdr);
2900 }
2901
2902 /*
2903  * a GET_LEASE_TIME request
2904  */
2905 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2906                                         struct xdr_stream *xdr,
2907                                         const void *data)
2908 {
2909         const struct nfs4_get_lease_time_args *args = data;
2910         struct compound_hdr hdr = {
2911                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2912         };
2913         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2914
2915         encode_compound_hdr(xdr, req, &hdr);
2916         encode_sequence(xdr, &args->la_seq_args, &hdr);
2917         encode_putrootfh(xdr, &hdr);
2918         encode_fsinfo(xdr, lease_bitmap, &hdr);
2919         encode_nops(&hdr);
2920 }
2921
2922 /*
2923  * a RECLAIM_COMPLETE request
2924  */
2925 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2926                                           struct xdr_stream *xdr,
2927                                           const void *data)
2928 {
2929         const struct nfs41_reclaim_complete_args *args = data;
2930         struct compound_hdr hdr = {
2931                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2932         };
2933
2934         encode_compound_hdr(xdr, req, &hdr);
2935         encode_sequence(xdr, &args->seq_args, &hdr);
2936         encode_reclaim_complete(xdr, args, &hdr);
2937         encode_nops(&hdr);
2938 }
2939
2940 /*
2941  * Encode GETDEVICEINFO request
2942  */
2943 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2944                                        struct xdr_stream *xdr,
2945                                        const void *data)
2946 {
2947         const struct nfs4_getdeviceinfo_args *args = data;
2948         struct compound_hdr hdr = {
2949                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950         };
2951
2952         encode_compound_hdr(xdr, req, &hdr);
2953         encode_sequence(xdr, &args->seq_args, &hdr);
2954         encode_getdeviceinfo(xdr, args, &hdr);
2955
2956         /* set up reply kvec. Subtract notification bitmap max size (2)
2957          * so that notification bitmap is put in xdr_buf tail */
2958         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2959                          args->pdev->pages, args->pdev->pgbase,
2960                          args->pdev->pglen);
2961
2962         encode_nops(&hdr);
2963 }
2964
2965 /*
2966  *  Encode LAYOUTGET request
2967  */
2968 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2969                                    struct xdr_stream *xdr,
2970                                    const void *data)
2971 {
2972         const struct nfs4_layoutget_args *args = data;
2973         struct compound_hdr hdr = {
2974                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2975         };
2976
2977         encode_compound_hdr(xdr, req, &hdr);
2978         encode_sequence(xdr, &args->seq_args, &hdr);
2979         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2980         encode_layoutget(xdr, args, &hdr);
2981
2982         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2983             args->layout.pages, 0, args->layout.pglen);
2984
2985         encode_nops(&hdr);
2986 }
2987
2988 /*
2989  *  Encode LAYOUTCOMMIT request
2990  */
2991 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2992                                       struct xdr_stream *xdr,
2993                                       const void *priv)
2994 {
2995         const struct nfs4_layoutcommit_args *args = priv;
2996         struct nfs4_layoutcommit_data *data =
2997                 container_of(args, struct nfs4_layoutcommit_data, args);
2998         struct compound_hdr hdr = {
2999                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3000         };
3001
3002         encode_compound_hdr(xdr, req, &hdr);
3003         encode_sequence(xdr, &args->seq_args, &hdr);
3004         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3005         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3006         encode_getfattr(xdr, args->bitmask, &hdr);
3007         encode_nops(&hdr);
3008 }
3009
3010 /*
3011  * Encode LAYOUTRETURN request
3012  */
3013 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3014                                       struct xdr_stream *xdr,
3015                                       const void *data)
3016 {
3017         const struct nfs4_layoutreturn_args *args = data;
3018         struct compound_hdr hdr = {
3019                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3020         };
3021
3022         encode_compound_hdr(xdr, req, &hdr);
3023         encode_sequence(xdr, &args->seq_args, &hdr);
3024         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3025         encode_layoutreturn(xdr, args, &hdr);
3026         encode_nops(&hdr);
3027 }
3028
3029 /*
3030  * Encode SECINFO_NO_NAME request
3031  */
3032 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3033                                         struct xdr_stream *xdr,
3034                                         const void *data)
3035 {
3036         const struct nfs41_secinfo_no_name_args *args = data;
3037         struct compound_hdr hdr = {
3038                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3039         };
3040
3041         encode_compound_hdr(xdr, req, &hdr);
3042         encode_sequence(xdr, &args->seq_args, &hdr);
3043         encode_putrootfh(xdr, &hdr);
3044         encode_secinfo_no_name(xdr, args, &hdr);
3045         encode_nops(&hdr);
3046 }
3047
3048 /*
3049  *  Encode TEST_STATEID request
3050  */
3051 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3052                                       struct xdr_stream *xdr,
3053                                       const void *data)
3054 {
3055         const struct nfs41_test_stateid_args *args = data;
3056         struct compound_hdr hdr = {
3057                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3058         };
3059
3060         encode_compound_hdr(xdr, req, &hdr);
3061         encode_sequence(xdr, &args->seq_args, &hdr);
3062         encode_test_stateid(xdr, args, &hdr);
3063         encode_nops(&hdr);
3064 }
3065
3066 /*
3067  *  Encode FREE_STATEID request
3068  */
3069 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3070                                      struct xdr_stream *xdr,
3071                                      const void *data)
3072 {
3073         const struct nfs41_free_stateid_args *args = data;
3074         struct compound_hdr hdr = {
3075                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3076         };
3077
3078         encode_compound_hdr(xdr, req, &hdr);
3079         encode_sequence(xdr, &args->seq_args, &hdr);
3080         encode_free_stateid(xdr, args, &hdr);
3081         encode_nops(&hdr);
3082 }
3083 #endif /* CONFIG_NFS_V4_1 */
3084
3085 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3086 {
3087         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3088                 "Remaining buffer length is %tu words.\n",
3089                 func, xdr->end - xdr->p);
3090 }
3091
3092 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3093 {
3094         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3095                         NFS4_OPAQUE_LIMIT);
3096         if (unlikely(ret < 0)) {
3097                 if (ret == -EBADMSG)
3098                         print_overflow_msg(__func__, xdr);
3099                 return -EIO;
3100         }
3101         *len = ret;
3102         return 0;
3103 }
3104
3105 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3106 {
3107         __be32 *p;
3108
3109         p = xdr_inline_decode(xdr, 8);
3110         if (unlikely(!p))
3111                 goto out_overflow;
3112         hdr->status = be32_to_cpup(p++);
3113         hdr->taglen = be32_to_cpup(p);
3114
3115         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3116         if (unlikely(!p))
3117                 goto out_overflow;
3118         hdr->tag = (char *)p;
3119         p += XDR_QUADLEN(hdr->taglen);
3120         hdr->nops = be32_to_cpup(p);
3121         if (unlikely(hdr->nops < 1))
3122                 return nfs4_stat_to_errno(hdr->status);
3123         return 0;
3124 out_overflow:
3125         print_overflow_msg(__func__, xdr);
3126         return -EIO;
3127 }
3128
3129 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3130                 int *nfs_retval)
3131 {
3132         __be32 *p;
3133         uint32_t opnum;
3134         int32_t nfserr;
3135
3136         p = xdr_inline_decode(xdr, 8);
3137         if (unlikely(!p))
3138                 goto out_overflow;
3139         opnum = be32_to_cpup(p++);
3140         if (unlikely(opnum != expected))
3141                 goto out_bad_operation;
3142         nfserr = be32_to_cpup(p);
3143         if (nfserr == NFS_OK)
3144                 *nfs_retval = 0;
3145         else
3146                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3147         return true;
3148 out_bad_operation:
3149         dprintk("nfs: Server returned operation"
3150                 " %d but we issued a request for %d\n",
3151                         opnum, expected);
3152         *nfs_retval = -EREMOTEIO;
3153         return false;
3154 out_overflow:
3155         print_overflow_msg(__func__, xdr);
3156         *nfs_retval = -EIO;
3157         return false;
3158 }
3159
3160 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3161 {
3162         int retval;
3163
3164         __decode_op_hdr(xdr, expected, &retval);
3165         return retval;
3166 }
3167
3168 /* Dummy routine */
3169 static int decode_ace(struct xdr_stream *xdr, void *ace)
3170 {
3171         __be32 *p;
3172         unsigned int strlen;
3173         char *str;
3174
3175         p = xdr_inline_decode(xdr, 12);
3176         if (likely(p))
3177                 return decode_opaque_inline(xdr, &strlen, &str);
3178         print_overflow_msg(__func__, xdr);
3179         return -EIO;
3180 }
3181
3182 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3183 {
3184         uint32_t bmlen;
3185         __be32 *p;
3186
3187         p = xdr_inline_decode(xdr, 4);
3188         if (unlikely(!p))
3189                 goto out_overflow;
3190         bmlen = be32_to_cpup(p);
3191
3192         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3193         p = xdr_inline_decode(xdr, (bmlen << 2));
3194         if (unlikely(!p))
3195                 goto out_overflow;
3196         if (bmlen > 0) {
3197                 bitmap[0] = be32_to_cpup(p++);
3198                 if (bmlen > 1) {
3199                         bitmap[1] = be32_to_cpup(p++);
3200                         if (bmlen > 2)
3201                                 bitmap[2] = be32_to_cpup(p);
3202                 }
3203         }
3204         return 0;
3205 out_overflow:
3206         print_overflow_msg(__func__, xdr);
3207         return -EIO;
3208 }
3209
3210 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3211 {
3212         __be32 *p;
3213
3214         p = xdr_inline_decode(xdr, 4);
3215         if (unlikely(!p))
3216                 goto out_overflow;
3217         *attrlen = be32_to_cpup(p);
3218         *savep = xdr_stream_pos(xdr);
3219         return 0;
3220 out_overflow:
3221         print_overflow_msg(__func__, xdr);
3222         return -EIO;
3223 }
3224
3225 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3226 {
3227         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3228                 int ret;
3229                 ret = decode_attr_bitmap(xdr, bitmask);
3230                 if (unlikely(ret < 0))
3231                         return ret;
3232                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3233         } else
3234                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3235         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3236                 bitmask[0], bitmask[1], bitmask[2]);
3237         return 0;
3238 }
3239
3240 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3241 {
3242         __be32 *p;
3243         int ret = 0;
3244
3245         *type = 0;
3246         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3247                 return -EIO;
3248         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3249                 p = xdr_inline_decode(xdr, 4);
3250                 if (unlikely(!p))
3251                         goto out_overflow;
3252                 *type = be32_to_cpup(p);
3253                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3254                         dprintk("%s: bad type %d\n", __func__, *type);
3255                         return -EIO;
3256                 }
3257                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3258                 ret = NFS_ATTR_FATTR_TYPE;
3259         }
3260         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3261         return ret;
3262 out_overflow:
3263         print_overflow_msg(__func__, xdr);
3264         return -EIO;
3265 }
3266
3267 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3268                                       uint32_t *bitmap, uint32_t *type)
3269 {
3270         __be32 *p;
3271
3272         *type = 0;
3273         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3274                 return -EIO;
3275         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3276                 p = xdr_inline_decode(xdr, 4);
3277                 if (unlikely(!p))
3278                         goto out_overflow;
3279                 *type = be32_to_cpup(p);
3280                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3281         }
3282         dprintk("%s: expire type=0x%x\n", __func__, *type);
3283         return 0;
3284 out_overflow:
3285         print_overflow_msg(__func__, xdr);
3286         return -EIO;
3287 }
3288
3289 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3290 {
3291         __be32 *p;
3292         int ret = 0;
3293
3294         *change = 0;
3295         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3296                 return -EIO;
3297         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3298                 p = xdr_inline_decode(xdr, 8);
3299                 if (unlikely(!p))
3300                         goto out_overflow;
3301                 xdr_decode_hyper(p, change);
3302                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3303                 ret = NFS_ATTR_FATTR_CHANGE;
3304         }
3305         dprintk("%s: change attribute=%Lu\n", __func__,
3306                         (unsigned long long)*change);
3307         return ret;
3308 out_overflow:
3309         print_overflow_msg(__func__, xdr);
3310         return -EIO;
3311 }
3312
3313 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3314 {
3315         __be32 *p;
3316         int ret = 0;
3317
3318         *size = 0;
3319         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3320                 return -EIO;
3321         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3322                 p = xdr_inline_decode(xdr, 8);
3323                 if (unlikely(!p))
3324                         goto out_overflow;
3325                 xdr_decode_hyper(p, size);
3326                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3327                 ret = NFS_ATTR_FATTR_SIZE;
3328         }
3329         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3330         return ret;
3331 out_overflow:
3332         print_overflow_msg(__func__, xdr);
3333         return -EIO;
3334 }
3335
3336 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3337 {
3338         __be32 *p;
3339
3340         *res = 0;
3341         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3342                 return -EIO;
3343         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3344                 p = xdr_inline_decode(xdr, 4);
3345                 if (unlikely(!p))
3346                         goto out_overflow;
3347                 *res = be32_to_cpup(p);
3348                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3349         }
3350         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3351         return 0;
3352 out_overflow:
3353         print_overflow_msg(__func__, xdr);
3354         return -EIO;
3355 }
3356
3357 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3358 {
3359         __be32 *p;
3360
3361         *res = 0;
3362         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3363                 return -EIO;
3364         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3365                 p = xdr_inline_decode(xdr, 4);
3366                 if (unlikely(!p))
3367                         goto out_overflow;
3368                 *res = be32_to_cpup(p);
3369                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3370         }
3371         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3372         return 0;
3373 out_overflow:
3374         print_overflow_msg(__func__, xdr);
3375         return -EIO;
3376 }
3377
3378 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3379 {
3380         __be32 *p;
3381         int ret = 0;
3382
3383         fsid->major = 0;
3384         fsid->minor = 0;
3385         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3386                 return -EIO;
3387         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3388                 p = xdr_inline_decode(xdr, 16);
3389                 if (unlikely(!p))
3390                         goto out_overflow;
3391                 p = xdr_decode_hyper(p, &fsid->major);
3392                 xdr_decode_hyper(p, &fsid->minor);
3393                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3394                 ret = NFS_ATTR_FATTR_FSID;
3395         }
3396         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3397                         (unsigned long long)fsid->major,
3398                         (unsigned long long)fsid->minor);
3399         return ret;
3400 out_overflow:
3401         print_overflow_msg(__func__, xdr);
3402         return -EIO;
3403 }
3404
3405 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3406 {
3407         __be32 *p;
3408
3409         *res = 60;
3410         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3411                 return -EIO;
3412         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3413                 p = xdr_inline_decode(xdr, 4);
3414                 if (unlikely(!p))
3415                         goto out_overflow;
3416                 *res = be32_to_cpup(p);
3417                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3418         }
3419         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3420         return 0;
3421 out_overflow:
3422         print_overflow_msg(__func__, xdr);
3423         return -EIO;
3424 }
3425
3426 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3427 {
3428         __be32 *p;
3429
3430         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3431                 return -EIO;
3432         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3433                 p = xdr_inline_decode(xdr, 4);
3434                 if (unlikely(!p))
3435                         goto out_overflow;
3436                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3437                 *res = -be32_to_cpup(p);
3438         }
3439         return 0;
3440 out_overflow:
3441         print_overflow_msg(__func__, xdr);
3442         return -EIO;
3443 }
3444
3445 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3446                                  uint32_t *bitmap, uint32_t *bitmask)
3447 {
3448         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3449                 int ret;
3450                 ret = decode_attr_bitmap(xdr, bitmask);
3451                 if (unlikely(ret < 0))
3452                         return ret;
3453                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3454         } else
3455                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3456         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3457                 bitmask[0], bitmask[1], bitmask[2]);
3458         return 0;
3459 }
3460
3461 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3462 {
3463         __be32 *p;
3464         int len;
3465
3466         if (fh != NULL)
3467                 memset(fh, 0, sizeof(*fh));
3468
3469         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3470                 return -EIO;
3471         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3472                 p = xdr_inline_decode(xdr, 4);
3473                 if (unlikely(!p))
3474                         goto out_overflow;
3475                 len = be32_to_cpup(p);
3476                 if (len > NFS4_FHSIZE)
3477                         return -EIO;
3478                 p = xdr_inline_decode(xdr, len);
3479                 if (unlikely(!p))
3480                         goto out_overflow;
3481                 if (fh != NULL) {
3482                         memcpy(fh->data, p, len);
3483                         fh->size = len;
3484                 }
3485                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3486         }
3487         return 0;
3488 out_overflow:
3489         print_overflow_msg(__func__, xdr);
3490         return -EIO;
3491 }
3492
3493 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3494 {
3495         __be32 *p;
3496
3497         *res = 0;
3498         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3499                 return -EIO;
3500         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3501                 p = xdr_inline_decode(xdr, 4);
3502                 if (unlikely(!p))
3503                         goto out_overflow;
3504                 *res = be32_to_cpup(p);
3505                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3506         }
3507         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3508         return 0;
3509 out_overflow:
3510         print_overflow_msg(__func__, xdr);
3511         return -EIO;
3512 }
3513
3514 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3515 {
3516         __be32 *p;
3517         int ret = 0;
3518
3519         *fileid = 0;
3520         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3521                 return -EIO;
3522         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3523                 p = xdr_inline_decode(xdr, 8);
3524                 if (unlikely(!p))
3525                         goto out_overflow;
3526                 xdr_decode_hyper(p, fileid);
3527                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3528                 ret = NFS_ATTR_FATTR_FILEID;
3529         }
3530         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3531         return ret;
3532 out_overflow:
3533         print_overflow_msg(__func__, xdr);
3534         return -EIO;
3535 }
3536
3537 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3538 {
3539         __be32 *p;
3540         int ret = 0;
3541
3542         *fileid = 0;
3543         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3544                 return -EIO;
3545         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3546                 p = xdr_inline_decode(xdr, 8);
3547                 if (unlikely(!p))
3548                         goto out_overflow;
3549                 xdr_decode_hyper(p, fileid);
3550                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3551                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3552         }
3553         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3554         return ret;
3555 out_overflow:
3556         print_overflow_msg(__func__, xdr);
3557         return -EIO;
3558 }
3559
3560 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3561 {
3562         __be32 *p;
3563         int status = 0;
3564
3565         *res = 0;
3566         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3567                 return -EIO;
3568         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3569                 p = xdr_inline_decode(xdr, 8);
3570                 if (unlikely(!p))
3571                         goto out_overflow;
3572                 xdr_decode_hyper(p, res);
3573                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3574         }
3575         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3576         return status;
3577 out_overflow:
3578         print_overflow_msg(__func__, xdr);
3579         return -EIO;
3580 }
3581
3582 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3583 {
3584         __be32 *p;
3585         int status = 0;
3586
3587         *res = 0;
3588         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3589                 return -EIO;
3590         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3591                 p = xdr_inline_decode(xdr, 8);
3592                 if (unlikely(!p))
3593                         goto out_overflow;
3594                 xdr_decode_hyper(p, res);
3595                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3596         }
3597         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3598         return status;
3599 out_overflow:
3600         print_overflow_msg(__func__, xdr);
3601         return -EIO;
3602 }
3603
3604 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3605 {
3606         __be32 *p;
3607         int status = 0;
3608
3609         *res = 0;
3610         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3611                 return -EIO;
3612         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3613                 p = xdr_inline_decode(xdr, 8);
3614                 if (unlikely(!p))
3615                         goto out_overflow;
3616                 xdr_decode_hyper(p, res);
3617                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3618         }
3619         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3620         return status;
3621 out_overflow:
3622         print_overflow_msg(__func__, xdr);
3623         return -EIO;
3624 }
3625
3626 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3627 {
3628         u32 n;
3629         __be32 *p;
3630         int status = 0;
3631
3632         p = xdr_inline_decode(xdr, 4);
3633         if (unlikely(!p))
3634                 goto out_overflow;
3635         n = be32_to_cpup(p);
3636         if (n == 0)
3637                 goto root_path;
3638         dprintk("pathname4: ");
3639         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3640                 dprintk("cannot parse %d components in path\n", n);
3641                 goto out_eio;
3642         }
3643         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3644                 struct nfs4_string *component = &path->components[path->ncomponents];
3645                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3646                 if (unlikely(status != 0))
3647                         goto out_eio;
3648                 ifdebug (XDR)
3649                         pr_cont("%s%.*s ",
3650                                 (path->ncomponents != n ? "/ " : ""),
3651                                 component->len, component->data);
3652         }
3653 out:
3654         return status;
3655 root_path:
3656 /* a root pathname is sent as a zero component4 */
3657         path->ncomponents = 1;
3658         path->components[0].len=0;
3659         path->components[0].data=NULL;
3660         dprintk("pathname4: /\n");
3661         goto out;
3662 out_eio:
3663         dprintk(" status %d", status);
3664         status = -EIO;
3665         goto out;
3666 out_overflow:
3667         print_overflow_msg(__func__, xdr);
3668         return -EIO;
3669 }
3670
3671 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3672 {
3673         int n;
3674         __be32 *p;
3675         int status = -EIO;
3676
3677         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3678                 goto out;
3679         status = 0;
3680         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3681                 goto out;
3682         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3683         status = -EIO;
3684         /* Ignore borken servers that return unrequested attrs */
3685         if (unlikely(res == NULL))
3686                 goto out;
3687         dprintk("%s: fsroot:\n", __func__);
3688         status = decode_pathname(xdr, &res->fs_path);
3689         if (unlikely(status != 0))
3690                 goto out;
3691         p = xdr_inline_decode(xdr, 4);
3692         if (unlikely(!p))
3693                 goto out_overflow;
3694         n = be32_to_cpup(p);
3695         if (n <= 0)
3696                 goto out_eio;
3697         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3698                 u32 m;
3699                 struct nfs4_fs_location *loc;
3700
3701                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3702                         break;
3703                 loc = &res->locations[res->nlocations];
3704                 p = xdr_inline_decode(xdr, 4);
3705                 if (unlikely(!p))
3706                         goto out_overflow;
3707                 m = be32_to_cpup(p);
3708
3709                 dprintk("%s: servers:\n", __func__);
3710                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3711                         struct nfs4_string *server;
3712
3713                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3714                                 unsigned int i;
3715                                 dprintk("%s: using first %u of %u servers "
3716                                         "returned for location %u\n",
3717                                                 __func__,
3718                                                 NFS4_FS_LOCATION_MAXSERVERS,
3719                                                 m, res->nlocations);
3720                                 for (i = loc->nservers; i < m; i++) {
3721                                         unsigned int len;
3722                                         char *data;
3723                                         status = decode_opaque_inline(xdr, &len, &data);
3724                                         if (unlikely(status != 0))
3725                                                 goto out_eio;
3726                                 }
3727                                 break;
3728                         }
3729                         server = &loc->servers[loc->nservers];
3730                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3731                         if (unlikely(status != 0))
3732                                 goto out_eio;
3733                         dprintk("%s ", server->data);
3734                 }
3735                 status = decode_pathname(xdr, &loc->rootpath);
3736                 if (unlikely(status != 0))
3737                         goto out_eio;
3738         }
3739         if (res->nlocations != 0)
3740                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3741 out:
3742         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3743         return status;
3744 out_overflow:
3745         print_overflow_msg(__func__, xdr);
3746 out_eio:
3747         status = -EIO;
3748         goto out;
3749 }
3750
3751 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3752 {
3753         __be32 *p;
3754         int status = 0;
3755
3756         *res = 0;
3757         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3758                 return -EIO;
3759         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3760                 p = xdr_inline_decode(xdr, 8);
3761                 if (unlikely(!p))
3762                         goto out_overflow;
3763                 xdr_decode_hyper(p, res);
3764                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3765         }
3766         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3767         return status;
3768 out_overflow:
3769         print_overflow_msg(__func__, xdr);
3770         return -EIO;
3771 }
3772
3773 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3774 {
3775         __be32 *p;
3776         int status = 0;
3777
3778         *maxlink = 1;
3779         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3780                 return -EIO;
3781         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3782                 p = xdr_inline_decode(xdr, 4);
3783                 if (unlikely(!p))
3784                         goto out_overflow;
3785                 *maxlink = be32_to_cpup(p);
3786                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3787         }
3788         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3789         return status;
3790 out_overflow:
3791         print_overflow_msg(__func__, xdr);
3792         return -EIO;
3793 }
3794
3795 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3796 {
3797         __be32 *p;
3798         int status = 0;
3799
3800         *maxname = 1024;
3801         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3802                 return -EIO;
3803         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3804                 p = xdr_inline_decode(xdr, 4);
3805                 if (unlikely(!p))
3806                         goto out_overflow;
3807                 *maxname = be32_to_cpup(p);
3808                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3809         }
3810         dprintk("%s: maxname=%u\n", __func__, *maxname);
3811         return status;
3812 out_overflow:
3813         print_overflow_msg(__func__, xdr);
3814         return -EIO;
3815 }
3816
3817 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3818 {
3819         __be32 *p;
3820         int status = 0;
3821
3822         *res = 1024;
3823         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3824                 return -EIO;
3825         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3826                 uint64_t maxread;
3827                 p = xdr_inline_decode(xdr, 8);
3828                 if (unlikely(!p))
3829                         goto out_overflow;
3830                 xdr_decode_hyper(p, &maxread);
3831                 if (maxread > 0x7FFFFFFF)
3832                         maxread = 0x7FFFFFFF;
3833                 *res = (uint32_t)maxread;
3834                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3835         }
3836         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3837         return status;
3838 out_overflow:
3839         print_overflow_msg(__func__, xdr);
3840         return -EIO;
3841 }
3842
3843 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3844 {
3845         __be32 *p;
3846         int status = 0;
3847
3848         *res = 1024;
3849         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3850                 return -EIO;
3851         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3852                 uint64_t maxwrite;
3853                 p = xdr_inline_decode(xdr, 8);
3854                 if (unlikely(!p))
3855                         goto out_overflow;
3856                 xdr_decode_hyper(p, &maxwrite);
3857                 if (maxwrite > 0x7FFFFFFF)
3858                         maxwrite = 0x7FFFFFFF;
3859                 *res = (uint32_t)maxwrite;
3860                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3861         }
3862         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3863         return status;
3864 out_overflow:
3865         print_overflow_msg(__func__, xdr);
3866         return -EIO;
3867 }
3868
3869 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3870 {
3871         uint32_t tmp;
3872         __be32 *p;
3873         int ret = 0;
3874
3875         *mode = 0;
3876         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3877                 return -EIO;
3878         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3879                 p = xdr_inline_decode(xdr, 4);
3880                 if (unlikely(!p))
3881                         goto out_overflow;
3882                 tmp = be32_to_cpup(p);
3883                 *mode = tmp & ~S_IFMT;
3884                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3885                 ret = NFS_ATTR_FATTR_MODE;
3886         }
3887         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3888         return ret;
3889 out_overflow:
3890         print_overflow_msg(__func__, xdr);
3891         return -EIO;
3892 }
3893
3894 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3895 {
3896         __be32 *p;
3897         int ret = 0;
3898
3899         *nlink = 1;
3900         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3901                 return -EIO;
3902         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3903                 p = xdr_inline_decode(xdr, 4);
3904                 if (unlikely(!p))
3905                         goto out_overflow;
3906                 *nlink = be32_to_cpup(p);
3907                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3908                 ret = NFS_ATTR_FATTR_NLINK;
3909         }
3910         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3911         return ret;
3912 out_overflow:
3913         print_overflow_msg(__func__, xdr);
3914         return -EIO;
3915 }
3916
3917 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3918                 struct nfs4_string *name, gfp_t gfp_flags)
3919 {
3920         ssize_t ret;
3921
3922         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3923                         XDR_MAX_NETOBJ, gfp_flags);
3924         name->len = 0;
3925         if (ret > 0)
3926                 name->len = ret;
3927         return ret;
3928 }
3929
3930 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3931                 const struct nfs_server *server, kuid_t *uid,
3932                 struct nfs4_string *owner_name)
3933 {
3934         ssize_t len;
3935         char *p;
3936
3937         *uid = make_kuid(&init_user_ns, -2);
3938         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3939                 return -EIO;
3940         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3941                 return 0;
3942         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3943
3944         if (owner_name != NULL) {
3945                 len = decode_nfs4_string(xdr, owner_name, GFP_NOWAIT);
3946                 if (len <= 0)
3947                         goto out;
3948                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3949                 return NFS_ATTR_FATTR_OWNER_NAME;
3950         } else {
3951                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3952                                 XDR_MAX_NETOBJ);
3953                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3954                         goto out;
3955                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3956                 return NFS_ATTR_FATTR_OWNER;
3957         }
3958 out:
3959         if (len != -EBADMSG)
3960                 return 0;
3961         print_overflow_msg(__func__, xdr);
3962         return -EIO;
3963 }
3964
3965 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3966                 const struct nfs_server *server, kgid_t *gid,
3967                 struct nfs4_string *group_name)
3968 {
3969         ssize_t len;
3970         char *p;
3971
3972         *gid = make_kgid(&init_user_ns, -2);
3973         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3974                 return -EIO;
3975         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3976                 return 0;
3977         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3978
3979         if (group_name != NULL) {
3980                 len = decode_nfs4_string(xdr, group_name, GFP_NOWAIT);
3981                 if (len <= 0)
3982                         goto out;
3983                 dprintk("%s: name=%s\n", __func__, group_name->data);
3984                 return NFS_ATTR_FATTR_GROUP_NAME;
3985         } else {
3986                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3987                                 XDR_MAX_NETOBJ);
3988                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3989                         goto out;
3990                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3991                 return NFS_ATTR_FATTR_GROUP;
3992         }
3993 out:
3994         if (len != -EBADMSG)
3995                 return 0;
3996         print_overflow_msg(__func__, xdr);
3997         return -EIO;
3998 }
3999
4000 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4001 {
4002         uint32_t major = 0, minor = 0;
4003         __be32 *p;
4004         int ret = 0;
4005
4006         *rdev = MKDEV(0,0);
4007         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4008                 return -EIO;
4009         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4010                 dev_t tmp;
4011
4012                 p = xdr_inline_decode(xdr, 8);
4013                 if (unlikely(!p))
4014                         goto out_overflow;
4015                 major = be32_to_cpup(p++);
4016                 minor = be32_to_cpup(p);
4017                 tmp = MKDEV(major, minor);
4018                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4019                         *rdev = tmp;
4020                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4021                 ret = NFS_ATTR_FATTR_RDEV;
4022         }
4023         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4024         return ret;
4025 out_overflow:
4026         print_overflow_msg(__func__, xdr);
4027         return -EIO;
4028 }
4029
4030 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4031 {
4032         __be32 *p;
4033         int status = 0;
4034
4035         *res = 0;
4036         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4037                 return -EIO;
4038         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4039                 p = xdr_inline_decode(xdr, 8);
4040                 if (unlikely(!p))
4041                         goto out_overflow;
4042                 xdr_decode_hyper(p, res);
4043                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4044         }
4045         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4046         return status;
4047 out_overflow:
4048         print_overflow_msg(__func__, xdr);
4049         return -EIO;
4050 }
4051
4052 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4053 {
4054         __be32 *p;
4055         int status = 0;
4056
4057         *res = 0;
4058         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4059                 return -EIO;
4060         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4061                 p = xdr_inline_decode(xdr, 8);
4062                 if (unlikely(!p))
4063                         goto out_overflow;
4064                 xdr_decode_hyper(p, res);
4065                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4066         }
4067         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4068         return status;
4069 out_overflow:
4070         print_overflow_msg(__func__, xdr);
4071         return -EIO;
4072 }
4073
4074 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4075 {
4076         __be32 *p;
4077         int status = 0;
4078
4079         *res = 0;
4080         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4081                 return -EIO;
4082         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4083                 p = xdr_inline_decode(xdr, 8);
4084                 if (unlikely(!p))
4085                         goto out_overflow;
4086                 xdr_decode_hyper(p, res);
4087                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4088         }
4089         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4090         return status;
4091 out_overflow:
4092         print_overflow_msg(__func__, xdr);
4093         return -EIO;
4094 }
4095
4096 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4097 {
4098         __be32 *p;
4099         int ret = 0;
4100
4101         *used = 0;
4102         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4103                 return -EIO;
4104         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4105                 p = xdr_inline_decode(xdr, 8);
4106                 if (unlikely(!p))
4107                         goto out_overflow;
4108                 xdr_decode_hyper(p, used);
4109                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4110                 ret = NFS_ATTR_FATTR_SPACE_USED;
4111         }
4112         dprintk("%s: space used=%Lu\n", __func__,
4113                         (unsigned long long)*used);
4114         return ret;
4115 out_overflow:
4116         print_overflow_msg(__func__, xdr);
4117         return -EIO;
4118 }
4119
4120 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4121 {
4122         __be32 *p;
4123         uint64_t sec;
4124         uint32_t nsec;
4125
4126         p = xdr_inline_decode(xdr, 12);
4127         if (unlikely(!p))
4128                 goto out_overflow;
4129         p = xdr_decode_hyper(p, &sec);
4130         nsec = be32_to_cpup(p);
4131         time->tv_sec = (time_t)sec;
4132         time->tv_nsec = (long)nsec;
4133         return 0;
4134 out_overflow:
4135         print_overflow_msg(__func__, xdr);
4136         return -EIO;
4137 }
4138
4139 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4140 {
4141         int status = 0;
4142
4143         time->tv_sec = 0;
4144         time->tv_nsec = 0;
4145         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4146                 return -EIO;
4147         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4148                 status = decode_attr_time(xdr, time);
4149                 if (status == 0)
4150                         status = NFS_ATTR_FATTR_ATIME;
4151                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4152         }
4153         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4154         return status;
4155 }
4156
4157 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4158 {
4159         int status = 0;
4160
4161         time->tv_sec = 0;
4162         time->tv_nsec = 0;
4163         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4164                 return -EIO;
4165         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4166                 status = decode_attr_time(xdr, time);
4167                 if (status == 0)
4168                         status = NFS_ATTR_FATTR_CTIME;
4169                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4170         }
4171         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4172         return status;
4173 }
4174
4175 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4176                                   struct timespec *time)
4177 {
4178         int status = 0;
4179
4180         time->tv_sec = 0;
4181         time->tv_nsec = 0;
4182         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4183                 return -EIO;
4184         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4185                 status = decode_attr_time(xdr, time);
4186                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4187         }
4188         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4189                 (long)time->tv_nsec);
4190         return status;
4191 }
4192
4193 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4194                                         struct nfs4_label *label)
4195 {
4196         uint32_t pi = 0;
4197         uint32_t lfs = 0;
4198         __u32 len;
4199         __be32 *p;
4200         int status = 0;
4201
4202         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4203                 return -EIO;
4204         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4205                 p = xdr_inline_decode(xdr, 4);
4206                 if (unlikely(!p))
4207                         goto out_overflow;
4208                 lfs = be32_to_cpup(p++);
4209                 p = xdr_inline_decode(xdr, 4);
4210                 if (unlikely(!p))
4211                         goto out_overflow;
4212                 pi = be32_to_cpup(p++);
4213                 p = xdr_inline_decode(xdr, 4);
4214                 if (unlikely(!p))
4215                         goto out_overflow;
4216                 len = be32_to_cpup(p++);
4217                 p = xdr_inline_decode(xdr, len);
4218                 if (unlikely(!p))
4219                         goto out_overflow;
4220                 if (len < NFS4_MAXLABELLEN) {
4221                         if (label) {
4222                                 memcpy(label->label, p, len);
4223                                 label->len = len;
4224                                 label->pi = pi;
4225                                 label->lfs = lfs;
4226                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4227                         }
4228                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4229                 } else
4230                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4231                                         __func__, len);
4232         }
4233         if (label && label->label)
4234                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4235                         (char *)label->label, label->len, label->pi, label->lfs);
4236         return status;
4237
4238 out_overflow:
4239         print_overflow_msg(__func__, xdr);
4240         return -EIO;
4241 }
4242
4243 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4244 {
4245         int status = 0;
4246
4247         time->tv_sec = 0;
4248         time->tv_nsec = 0;
4249         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4250                 return -EIO;
4251         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4252                 status = decode_attr_time(xdr, time);
4253                 if (status == 0)
4254                         status = NFS_ATTR_FATTR_MTIME;
4255                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4256         }
4257         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4258         return status;
4259 }
4260
4261 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4262 {
4263         unsigned int attrwords = XDR_QUADLEN(attrlen);
4264         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4265
4266         if (unlikely(attrwords != nwords)) {
4267                 dprintk("%s: server returned incorrect attribute length: "
4268                         "%u %c %u\n",
4269                                 __func__,
4270                                 attrwords << 2,
4271                                 (attrwords < nwords) ? '<' : '>',
4272                                 nwords << 2);
4273                 return -EIO;
4274         }
4275         return 0;
4276 }
4277
4278 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4279 {
4280         __be32 *p;
4281
4282         p = xdr_inline_decode(xdr, 20);
4283         if (unlikely(!p))
4284                 goto out_overflow;
4285         cinfo->atomic = be32_to_cpup(p++);
4286         p = xdr_decode_hyper(p, &cinfo->before);
4287         xdr_decode_hyper(p, &cinfo->after);
4288         return 0;
4289 out_overflow:
4290         print_overflow_msg(__func__, xdr);
4291         return -EIO;
4292 }
4293
4294 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4295 {
4296         __be32 *p;
4297         uint32_t supp, acc;
4298         int status;
4299
4300         status = decode_op_hdr(xdr, OP_ACCESS);
4301         if (status)
4302                 return status;
4303         p = xdr_inline_decode(xdr, 8);
4304         if (unlikely(!p))
4305                 goto out_overflow;
4306         supp = be32_to_cpup(p++);
4307         acc = be32_to_cpup(p);
4308         *supported = supp;
4309         *access = acc;
4310         return 0;
4311 out_overflow:
4312         print_overflow_msg(__func__, xdr);
4313         return -EIO;
4314 }
4315
4316 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4317 {
4318         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4319         if (unlikely(ret < 0)) {
4320                 print_overflow_msg(__func__, xdr);
4321                 return -EIO;
4322         }
4323         return 0;
4324 }
4325
4326 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4327 {
4328         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4329 }
4330
4331 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4332 {
4333         stateid->type = NFS4_OPEN_STATEID_TYPE;
4334         return decode_stateid(xdr, stateid);
4335 }
4336
4337 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4338 {
4339         stateid->type = NFS4_LOCK_STATEID_TYPE;
4340         return decode_stateid(xdr, stateid);
4341 }
4342
4343 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4344 {
4345         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4346         return decode_stateid(xdr, stateid);
4347 }
4348
4349 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4350 {
4351         int status;
4352
4353         status = decode_op_hdr(xdr, OP_CLOSE);
4354         if (status != -EIO)
4355                 nfs_increment_open_seqid(status, res->seqid);
4356         if (!status)
4357                 status = decode_open_stateid(xdr, &res->stateid);
4358         return status;
4359 }
4360
4361 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4362 {
4363         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4364 }
4365
4366 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4367 {
4368         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4369 }
4370
4371 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4372 {
4373         int status;
4374
4375         status = decode_op_hdr(xdr, OP_COMMIT);
4376         if (!status)
4377                 status = decode_write_verifier(xdr, &res->verf->verifier);
4378         return status;
4379 }
4380
4381 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4382 {
4383         __be32 *p;
4384         uint32_t bmlen;
4385         int status;
4386
4387         status = decode_op_hdr(xdr, OP_CREATE);
4388         if (status)
4389                 return status;
4390         if ((status = decode_change_info(xdr, cinfo)))
4391                 return status;
4392         p = xdr_inline_decode(xdr, 4);
4393         if (unlikely(!p))
4394                 goto out_overflow;
4395         bmlen = be32_to_cpup(p);
4396         p = xdr_inline_decode(xdr, bmlen << 2);
4397         if (likely(p))
4398                 return 0;
4399 out_overflow:
4400         print_overflow_msg(__func__, xdr);
4401         return -EIO;
4402 }
4403
4404 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4405 {
4406         unsigned int savep;
4407         uint32_t attrlen, bitmap[3] = {0};
4408         int status;
4409
4410         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4411                 goto xdr_error;
4412         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4413                 goto xdr_error;
4414         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4415                 goto xdr_error;
4416         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4417                 goto xdr_error;
4418         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4419                                                  &res->fh_expire_type)) != 0)
4420                 goto xdr_error;
4421         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4422                 goto xdr_error;
4423         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4424                 goto xdr_error;
4425         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4426                 goto xdr_error;
4427         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4428                                 res->exclcreat_bitmask)) != 0)
4429                 goto xdr_error;
4430         status = verify_attr_len(xdr, savep, attrlen);
4431 xdr_error:
4432         dprintk("%s: xdr returned %d!\n", __func__, -status);
4433         return status;
4434 }
4435
4436 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4437 {
4438         unsigned int savep;
4439         uint32_t attrlen, bitmap[3] = {0};
4440         int status;
4441
4442         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4443                 goto xdr_error;
4444         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4445                 goto xdr_error;
4446         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4447                 goto xdr_error;
4448
4449         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4450                 goto xdr_error;
4451         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4452                 goto xdr_error;
4453         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4454                 goto xdr_error;
4455
4456         status = -EIO;
4457         if (unlikely(bitmap[0]))
4458                 goto xdr_error;
4459
4460         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4461                 goto xdr_error;
4462         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4463                 goto xdr_error;
4464         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4465                 goto xdr_error;
4466
4467         status = verify_attr_len(xdr, savep, attrlen);
4468 xdr_error:
4469         dprintk("%s: xdr returned %d!\n", __func__, -status);
4470         return status;
4471 }
4472
4473 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4474 {
4475         unsigned int savep;
4476         uint32_t attrlen, bitmap[3] = {0};
4477         int status;
4478
4479         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4480                 goto xdr_error;
4481         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4482                 goto xdr_error;
4483         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4484                 goto xdr_error;
4485
4486         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4487                 goto xdr_error;
4488         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4489                 goto xdr_error;
4490
4491         status = verify_attr_len(xdr, savep, attrlen);
4492 xdr_error:
4493         dprintk("%s: xdr returned %d!\n", __func__, -status);
4494         return status;
4495 }
4496
4497 static int decode_threshold_hint(struct xdr_stream *xdr,
4498                                   uint32_t *bitmap,
4499                                   uint64_t *res,
4500                                   uint32_t hint_bit)
4501 {
4502         __be32 *p;
4503
4504         *res = 0;
4505         if (likely(bitmap[0] & hint_bit)) {
4506                 p = xdr_inline_decode(xdr, 8);
4507                 if (unlikely(!p))
4508                         goto out_overflow;
4509                 xdr_decode_hyper(p, res);
4510         }
4511         return 0;
4512 out_overflow:
4513         print_overflow_msg(__func__, xdr);
4514         return -EIO;
4515 }
4516
4517 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4518                                         struct nfs4_threshold *res)
4519 {
4520         __be32 *p;
4521         unsigned int savep;
4522         uint32_t bitmap[3] = {0,}, attrlen;
4523         int status;
4524
4525         /* layout type */
4526         p = xdr_inline_decode(xdr, 4);
4527         if (unlikely(!p)) {
4528                 print_overflow_msg(__func__, xdr);
4529                 return -EIO;
4530         }
4531         res->l_type = be32_to_cpup(p);
4532
4533         /* thi_hintset bitmap */
4534         status = decode_attr_bitmap(xdr, bitmap);
4535         if (status < 0)
4536                 goto xdr_error;
4537
4538         /* thi_hintlist length */
4539         status = decode_attr_length(xdr, &attrlen, &savep);
4540         if (status < 0)
4541                 goto xdr_error;
4542         /* thi_hintlist */
4543         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4544         if (status < 0)
4545                 goto xdr_error;
4546         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4547         if (status < 0)
4548                 goto xdr_error;
4549         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4550                                        THRESHOLD_RD_IO);
4551         if (status < 0)
4552                 goto xdr_error;
4553         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4554                                        THRESHOLD_WR_IO);
4555         if (status < 0)
4556                 goto xdr_error;
4557
4558         status = verify_attr_len(xdr, savep, attrlen);
4559         res->bm = bitmap[0];
4560
4561         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4562                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4563                 res->wr_io_sz);
4564 xdr_error:
4565         dprintk("%s ret=%d!\n", __func__, status);
4566         return status;
4567 }
4568
4569 /*
4570  * Thresholds on pNFS direct I/O vrs MDS I/O
4571  */
4572 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4573                                     uint32_t *bitmap,
4574                                     struct nfs4_threshold *res)
4575 {
4576         __be32 *p;
4577         int status = 0;
4578         uint32_t num;
4579
4580         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4581                 return -EIO;
4582         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4583                 /* Did the server return an unrequested attribute? */
4584                 if (unlikely(res == NULL))
4585                         return -EREMOTEIO;
4586                 p = xdr_inline_decode(xdr, 4);
4587                 if (unlikely(!p))
4588                         goto out_overflow;
4589                 num = be32_to_cpup(p);
4590                 if (num == 0)
4591                         return 0;
4592                 if (num > 1)
4593                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4594                                 "drivers per filesystem not supported\n",
4595                                 __func__);
4596
4597                 status = decode_first_threshold_item4(xdr, res);
4598                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4599         }
4600         return status;
4601 out_overflow:
4602         print_overflow_msg(__func__, xdr);
4603         return -EIO;
4604 }
4605
4606 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4607                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4608                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4609                 const struct nfs_server *server)
4610 {
4611         int status;
4612         umode_t fmode = 0;
4613         uint32_t type;
4614         int32_t err;
4615
4616         status = decode_attr_type(xdr, bitmap, &type);
4617         if (status < 0)
4618                 goto xdr_error;
4619         fattr->mode = 0;
4620         if (status != 0) {
4621                 fattr->mode |= nfs_type2fmt[type];
4622                 fattr->valid |= status;
4623         }
4624
4625         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4626         if (status < 0)
4627                 goto xdr_error;
4628         fattr->valid |= status;
4629
4630         status = decode_attr_size(xdr, bitmap, &fattr->size);
4631         if (status < 0)
4632                 goto xdr_error;
4633         fattr->valid |= status;
4634
4635         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4636         if (status < 0)
4637                 goto xdr_error;
4638         fattr->valid |= status;
4639
4640         err = 0;
4641         status = decode_attr_error(xdr, bitmap, &err);
4642         if (status < 0)
4643                 goto xdr_error;
4644
4645         status = decode_attr_filehandle(xdr, bitmap, fh);
4646         if (status < 0)
4647                 goto xdr_error;
4648
4649         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4650         if (status < 0)
4651                 goto xdr_error;
4652         fattr->valid |= status;
4653
4654         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4655         if (status < 0)
4656                 goto xdr_error;
4657         fattr->valid |= status;
4658
4659         status = -EIO;
4660         if (unlikely(bitmap[0]))
4661                 goto xdr_error;
4662
4663         status = decode_attr_mode(xdr, bitmap, &fmode);
4664         if (status < 0)
4665                 goto xdr_error;
4666         if (status != 0) {
4667                 fattr->mode |= fmode;
4668                 fattr->valid |= status;
4669         }
4670
4671         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4672         if (status < 0)
4673                 goto xdr_error;
4674         fattr->valid |= status;
4675
4676         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4677         if (status < 0)
4678                 goto xdr_error;
4679         fattr->valid |= status;
4680
4681         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4682         if (status < 0)
4683                 goto xdr_error;
4684         fattr->valid |= status;
4685
4686         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4687         if (status < 0)
4688                 goto xdr_error;
4689         fattr->valid |= status;
4690
4691         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4692         if (status < 0)
4693                 goto xdr_error;
4694         fattr->valid |= status;
4695
4696         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4697         if (status < 0)
4698                 goto xdr_error;
4699         fattr->valid |= status;
4700
4701         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4702         if (status < 0)
4703                 goto xdr_error;
4704         fattr->valid |= status;
4705
4706         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4707         if (status < 0)
4708                 goto xdr_error;
4709         fattr->valid |= status;
4710
4711         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4712         if (status < 0)
4713                 goto xdr_error;
4714         fattr->valid |= status;
4715
4716         status = -EIO;
4717         if (unlikely(bitmap[1]))
4718                 goto xdr_error;
4719
4720         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4721         if (status < 0)
4722                 goto xdr_error;
4723
4724         if (label) {
4725                 status = decode_attr_security_label(xdr, bitmap, label);
4726                 if (status < 0)
4727                         goto xdr_error;
4728                 fattr->valid |= status;
4729         }
4730
4731 xdr_error:
4732         dprintk("%s: xdr returned %d\n", __func__, -status);
4733         return status;
4734 }
4735
4736 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4737                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4738                 struct nfs4_label *label, const struct nfs_server *server)
4739 {
4740         unsigned int savep;
4741         uint32_t attrlen,
4742                  bitmap[3] = {0};
4743         int status;
4744
4745         status = decode_op_hdr(xdr, OP_GETATTR);
4746         if (status < 0)
4747                 goto xdr_error;
4748
4749         status = decode_attr_bitmap(xdr, bitmap);
4750         if (status < 0)
4751                 goto xdr_error;
4752
4753         status = decode_attr_length(xdr, &attrlen, &savep);
4754         if (status < 0)
4755                 goto xdr_error;
4756
4757         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4758                                         label, server);
4759         if (status < 0)
4760                 goto xdr_error;
4761
4762         status = verify_attr_len(xdr, savep, attrlen);
4763 xdr_error:
4764         dprintk("%s: xdr returned %d\n", __func__, -status);
4765         return status;
4766 }
4767
4768 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4769                 struct nfs4_label *label, const struct nfs_server *server)
4770 {
4771         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4772 }
4773
4774 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4775                 const struct nfs_server *server)
4776 {
4777         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4778 }
4779
4780 /*
4781  * Decode potentially multiple layout types.
4782  */
4783 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4784                                     struct nfs_fsinfo *fsinfo)
4785 {
4786         __be32 *p;
4787         uint32_t i;
4788
4789         p = xdr_inline_decode(xdr, 4);
4790         if (unlikely(!p))
4791                 goto out_overflow;
4792         fsinfo->nlayouttypes = be32_to_cpup(p);
4793
4794         /* pNFS is not supported by the underlying file system */
4795         if (fsinfo->nlayouttypes == 0)
4796                 return 0;
4797
4798         /* Decode and set first layout type, move xdr->p past unused types */
4799         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4800         if (unlikely(!p))
4801                 goto out_overflow;
4802
4803         /* If we get too many, then just cap it at the max */
4804         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4805                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4806                         __func__, fsinfo->nlayouttypes);
4807                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4808         }
4809
4810         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4811                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4812         return 0;
4813 out_overflow:
4814         print_overflow_msg(__func__, xdr);
4815         return -EIO;
4816 }
4817
4818 /*
4819  * The type of file system exported.
4820  * Note we must ensure that layouttype is set in any non-error case.
4821  */
4822 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4823                                 struct nfs_fsinfo *fsinfo)
4824 {
4825         int status = 0;
4826
4827         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4828         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4829                 return -EIO;
4830         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4831                 status = decode_pnfs_layout_types(xdr, fsinfo);
4832                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4833         }
4834         return status;
4835 }
4836
4837 /*
4838  * The prefered block size for layout directed io
4839  */
4840 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4841                                       uint32_t *res)
4842 {
4843         __be32 *p;
4844
4845         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4846         *res = 0;
4847         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4848                 p = xdr_inline_decode(xdr, 4);
4849                 if (unlikely(!p)) {
4850                         print_overflow_msg(__func__, xdr);
4851                         return -EIO;
4852                 }
4853                 *res = be32_to_cpup(p);
4854                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4855         }
4856         return 0;
4857 }
4858
4859 /*
4860  * The granularity of a CLONE operation.
4861  */
4862 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4863                                      uint32_t *res)
4864 {
4865         __be32 *p;
4866
4867         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4868         *res = 0;
4869         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4870                 p = xdr_inline_decode(xdr, 4);
4871                 if (unlikely(!p)) {
4872                         print_overflow_msg(__func__, xdr);
4873                         return -EIO;
4874                 }
4875                 *res = be32_to_cpup(p);
4876                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4877         }
4878         return 0;
4879 }
4880
4881 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4882 {
4883         unsigned int savep;
4884         uint32_t attrlen, bitmap[3];
4885         int status;
4886
4887         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4888                 goto xdr_error;
4889         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4890                 goto xdr_error;
4891         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4892                 goto xdr_error;
4893
4894         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4895
4896         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4897                 goto xdr_error;
4898         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4899                 goto xdr_error;
4900         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4901                 goto xdr_error;
4902         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4903         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4904                 goto xdr_error;
4905         fsinfo->wtpref = fsinfo->wtmax;
4906
4907         status = -EIO;
4908         if (unlikely(bitmap[0]))
4909                 goto xdr_error;
4910
4911         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4912         if (status != 0)
4913                 goto xdr_error;
4914         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4915         if (status != 0)
4916                 goto xdr_error;
4917
4918         status = -EIO;
4919         if (unlikely(bitmap[1]))
4920                 goto xdr_error;
4921
4922         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4923         if (status)
4924                 goto xdr_error;
4925         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4926         if (status)
4927                 goto xdr_error;
4928
4929         status = verify_attr_len(xdr, savep, attrlen);
4930 xdr_error:
4931         dprintk("%s: xdr returned %d!\n", __func__, -status);
4932         return status;
4933 }
4934
4935 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4936 {
4937         __be32 *p;
4938         uint32_t len;
4939         int status;
4940
4941         /* Zero handle first to allow comparisons */
4942         memset(fh, 0, sizeof(*fh));
4943
4944         status = decode_op_hdr(xdr, OP_GETFH);
4945         if (status)
4946                 return status;
4947
4948         p = xdr_inline_decode(xdr, 4);
4949         if (unlikely(!p))
4950                 goto out_overflow;
4951         len = be32_to_cpup(p);
4952         if (len > NFS4_FHSIZE)
4953                 return -EIO;
4954         fh->size = len;
4955         p = xdr_inline_decode(xdr, len);
4956         if (unlikely(!p))
4957                 goto out_overflow;
4958         memcpy(fh->data, p, len);
4959         return 0;
4960 out_overflow:
4961         print_overflow_msg(__func__, xdr);
4962         return -EIO;
4963 }
4964
4965 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4966 {
4967         int status;
4968
4969         status = decode_op_hdr(xdr, OP_LINK);
4970         if (status)
4971                 return status;
4972         return decode_change_info(xdr, cinfo);
4973 }
4974
4975 /*
4976  * We create the owner, so we know a proper owner.id length is 4.
4977  */
4978 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4979 {
4980         uint64_t offset, length, clientid;
4981         __be32 *p;
4982         uint32_t namelen, type;
4983
4984         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4985         if (unlikely(!p))
4986                 goto out_overflow;
4987         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4988         p = xdr_decode_hyper(p, &length);
4989         type = be32_to_cpup(p++); /* 4 byte read */
4990         if (fl != NULL) { /* manipulate file lock */
4991                 fl->fl_start = (loff_t)offset;
4992                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4993                 if (length == ~(uint64_t)0)
4994                         fl->fl_end = OFFSET_MAX;
4995                 fl->fl_type = F_WRLCK;
4996                 if (type & 1)
4997                         fl->fl_type = F_RDLCK;
4998                 fl->fl_pid = 0;
4999         }
5000         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5001         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5002         p = xdr_inline_decode(xdr, namelen); /* variable size field */
5003         if (likely(p))
5004                 return -NFS4ERR_DENIED;
5005 out_overflow:
5006         print_overflow_msg(__func__, xdr);
5007         return -EIO;
5008 }
5009
5010 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5011 {
5012         int status;
5013
5014         status = decode_op_hdr(xdr, OP_LOCK);
5015         if (status == -EIO)
5016                 goto out;
5017         if (status == 0) {
5018                 status = decode_lock_stateid(xdr, &res->stateid);
5019                 if (unlikely(status))
5020                         goto out;
5021         } else if (status == -NFS4ERR_DENIED)
5022                 status = decode_lock_denied(xdr, NULL);
5023         if (res->open_seqid != NULL)
5024                 nfs_increment_open_seqid(status, res->open_seqid);
5025         nfs_increment_lock_seqid(status, res->lock_seqid);
5026 out:
5027         return status;
5028 }
5029
5030 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5031 {
5032         int status;
5033         status = decode_op_hdr(xdr, OP_LOCKT);
5034         if (status == -NFS4ERR_DENIED)
5035                 return decode_lock_denied(xdr, res->denied);
5036         return status;
5037 }
5038
5039 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5040 {
5041         int status;
5042
5043         status = decode_op_hdr(xdr, OP_LOCKU);
5044         if (status != -EIO)
5045                 nfs_increment_lock_seqid(status, res->seqid);
5046         if (status == 0)
5047                 status = decode_lock_stateid(xdr, &res->stateid);
5048         return status;
5049 }
5050
5051 static int decode_release_lockowner(struct xdr_stream *xdr)
5052 {
5053         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5054 }
5055
5056 static int decode_lookup(struct xdr_stream *xdr)
5057 {
5058         return decode_op_hdr(xdr, OP_LOOKUP);
5059 }
5060
5061 /* This is too sick! */
5062 static int decode_space_limit(struct xdr_stream *xdr,
5063                 unsigned long *pagemod_limit)
5064 {
5065         __be32 *p;
5066         uint32_t limit_type, nblocks, blocksize;
5067         u64 maxsize = 0;
5068
5069         p = xdr_inline_decode(xdr, 12);
5070         if (unlikely(!p))
5071                 goto out_overflow;
5072         limit_type = be32_to_cpup(p++);
5073         switch (limit_type) {
5074         case NFS4_LIMIT_SIZE:
5075                 xdr_decode_hyper(p, &maxsize);
5076                 break;
5077         case NFS4_LIMIT_BLOCKS:
5078                 nblocks = be32_to_cpup(p++);
5079                 blocksize = be32_to_cpup(p);
5080                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5081         }
5082         maxsize >>= PAGE_SHIFT;
5083         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5084         return 0;
5085 out_overflow:
5086         print_overflow_msg(__func__, xdr);
5087         return -EIO;
5088 }
5089
5090 static int decode_rw_delegation(struct xdr_stream *xdr,
5091                 uint32_t delegation_type,
5092                 struct nfs_openres *res)
5093 {
5094         __be32 *p;
5095         int status;
5096
5097         status = decode_delegation_stateid(xdr, &res->delegation);
5098         if (unlikely(status))
5099                 return status;
5100         p = xdr_inline_decode(xdr, 4);
5101         if (unlikely(!p))
5102                 goto out_overflow;
5103         res->do_recall = be32_to_cpup(p);
5104
5105         switch (delegation_type) {
5106         case NFS4_OPEN_DELEGATE_READ:
5107                 res->delegation_type = FMODE_READ;
5108                 break;
5109         case NFS4_OPEN_DELEGATE_WRITE:
5110                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5111                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5112                                 return -EIO;
5113         }
5114         return decode_ace(xdr, NULL);
5115 out_overflow:
5116         print_overflow_msg(__func__, xdr);
5117         return -EIO;
5118 }
5119
5120 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5121 {
5122         __be32 *p;
5123         uint32_t why_no_delegation;
5124
5125         p = xdr_inline_decode(xdr, 4);
5126         if (unlikely(!p))
5127                 goto out_overflow;
5128         why_no_delegation = be32_to_cpup(p);
5129         switch (why_no_delegation) {
5130                 case WND4_CONTENTION:
5131                 case WND4_RESOURCE:
5132                         xdr_inline_decode(xdr, 4);
5133                         /* Ignore for now */
5134         }
5135         return 0;
5136 out_overflow:
5137         print_overflow_msg(__func__, xdr);
5138         return -EIO;
5139 }
5140
5141 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5142 {
5143         __be32 *p;
5144         uint32_t delegation_type;
5145
5146         p = xdr_inline_decode(xdr, 4);
5147         if (unlikely(!p))
5148                 goto out_overflow;
5149         delegation_type = be32_to_cpup(p);
5150         res->delegation_type = 0;
5151         switch (delegation_type) {
5152         case NFS4_OPEN_DELEGATE_NONE:
5153                 return 0;
5154         case NFS4_OPEN_DELEGATE_READ:
5155         case NFS4_OPEN_DELEGATE_WRITE:
5156                 return decode_rw_delegation(xdr, delegation_type, res);
5157         case NFS4_OPEN_DELEGATE_NONE_EXT:
5158                 return decode_no_delegation(xdr, res);
5159         }
5160         return -EIO;
5161 out_overflow:
5162         print_overflow_msg(__func__, xdr);
5163         return -EIO;
5164 }
5165
5166 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5167 {
5168         __be32 *p;
5169         uint32_t savewords, bmlen, i;
5170         int status;
5171
5172         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5173                 return status;
5174         nfs_increment_open_seqid(status, res->seqid);
5175         if (status)
5176                 return status;
5177         status = decode_open_stateid(xdr, &res->stateid);
5178         if (unlikely(status))
5179                 return status;
5180
5181         decode_change_info(xdr, &res->cinfo);
5182
5183         p = xdr_inline_decode(xdr, 8);
5184         if (unlikely(!p))
5185                 goto out_overflow;
5186         res->rflags = be32_to_cpup(p++);
5187         bmlen = be32_to_cpup(p);
5188         if (bmlen > 10)
5189                 goto xdr_error;
5190
5191         p = xdr_inline_decode(xdr, bmlen << 2);
5192         if (unlikely(!p))
5193                 goto out_overflow;
5194         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5195         for (i = 0; i < savewords; ++i)
5196                 res->attrset[i] = be32_to_cpup(p++);
5197         for (; i < NFS4_BITMAP_SIZE; i++)
5198                 res->attrset[i] = 0;
5199
5200         return decode_delegation(xdr, res);
5201 xdr_error:
5202         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5203         return -EIO;
5204 out_overflow:
5205         print_overflow_msg(__func__, xdr);
5206         return -EIO;
5207 }
5208
5209 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5210 {
5211         int status;
5212
5213         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5214         if (status != -EIO)
5215                 nfs_increment_open_seqid(status, res->seqid);
5216         if (!status)
5217                 status = decode_open_stateid(xdr, &res->stateid);
5218         return status;
5219 }
5220
5221 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5222 {
5223         int status;
5224
5225         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5226         if (status != -EIO)
5227                 nfs_increment_open_seqid(status, res->seqid);
5228         if (!status)
5229                 status = decode_open_stateid(xdr, &res->stateid);
5230         return status;
5231 }
5232
5233 static int decode_putfh(struct xdr_stream *xdr)
5234 {
5235         return decode_op_hdr(xdr, OP_PUTFH);
5236 }
5237
5238 static int decode_putrootfh(struct xdr_stream *xdr)
5239 {
5240         return decode_op_hdr(xdr, OP_PUTROOTFH);
5241 }
5242
5243 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5244                        struct nfs_pgio_res *res)
5245 {
5246         __be32 *p;
5247         uint32_t count, eof, recvd;
5248         int status;
5249
5250         status = decode_op_hdr(xdr, OP_READ);
5251         if (status)
5252                 return status;
5253         p = xdr_inline_decode(xdr, 8);
5254         if (unlikely(!p))
5255                 goto out_overflow;
5256         eof = be32_to_cpup(p++);
5257         count = be32_to_cpup(p);
5258         recvd = xdr_read_pages(xdr, count);
5259         if (count > recvd) {
5260                 dprintk("NFS: server cheating in read reply: "
5261                                 "count %u > recvd %u\n", count, recvd);
5262                 count = recvd;
5263                 eof = 0;
5264         }
5265         res->eof = eof;
5266         res->count = count;
5267         return 0;
5268 out_overflow:
5269         print_overflow_msg(__func__, xdr);
5270         return -EIO;
5271 }
5272
5273 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5274 {
5275         int             status;
5276         __be32          verf[2];
5277
5278         status = decode_op_hdr(xdr, OP_READDIR);
5279         if (!status)
5280                 status = decode_verifier(xdr, readdir->verifier.data);
5281         if (unlikely(status))
5282                 return status;
5283         memcpy(verf, readdir->verifier.data, sizeof(verf));
5284         dprintk("%s: verifier = %08x:%08x\n",
5285                         __func__, verf[0], verf[1]);
5286         return xdr_read_pages(xdr, xdr->buf->page_len);
5287 }
5288
5289 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5290 {
5291         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5292         u32 len, recvd;
5293         __be32 *p;
5294         int status;
5295
5296         status = decode_op_hdr(xdr, OP_READLINK);
5297         if (status)
5298                 return status;
5299
5300         /* Convert length of symlink */
5301         p = xdr_inline_decode(xdr, 4);
5302         if (unlikely(!p))
5303                 goto out_overflow;
5304         len = be32_to_cpup(p);
5305         if (len >= rcvbuf->page_len || len <= 0) {
5306                 dprintk("nfs: server returned giant symlink!\n");
5307                 return -ENAMETOOLONG;
5308         }
5309         recvd = xdr_read_pages(xdr, len);
5310         if (recvd < len) {
5311                 dprintk("NFS: server cheating in readlink reply: "
5312                                 "count %u > recvd %u\n", len, recvd);
5313                 return -EIO;
5314         }
5315         /*
5316          * The XDR encode routine has set things up so that
5317          * the link text will be copied directly into the
5318          * buffer.  We just have to do overflow-checking,
5319          * and and null-terminate the text (the VFS expects
5320          * null-termination).
5321          */
5322         xdr_terminate_string(rcvbuf, len);
5323         return 0;
5324 out_overflow:
5325         print_overflow_msg(__func__, xdr);
5326         return -EIO;
5327 }
5328
5329 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5330 {
5331         int status;
5332
5333         status = decode_op_hdr(xdr, OP_REMOVE);
5334         if (status)
5335                 goto out;
5336         status = decode_change_info(xdr, cinfo);
5337 out:
5338         return status;
5339 }
5340
5341 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5342               struct nfs4_change_info *new_cinfo)
5343 {
5344         int status;
5345
5346         status = decode_op_hdr(xdr, OP_RENAME);
5347         if (status)
5348                 goto out;
5349         if ((status = decode_change_info(xdr, old_cinfo)))
5350                 goto out;
5351         status = decode_change_info(xdr, new_cinfo);
5352 out:
5353         return status;
5354 }
5355
5356 static int decode_renew(struct xdr_stream *xdr)
5357 {
5358         return decode_op_hdr(xdr, OP_RENEW);
5359 }
5360
5361 static int
5362 decode_restorefh(struct xdr_stream *xdr)
5363 {
5364         return decode_op_hdr(xdr, OP_RESTOREFH);
5365 }
5366
5367 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5368                          struct nfs_getaclres *res)
5369 {
5370         unsigned int savep;
5371         uint32_t attrlen,
5372                  bitmap[3] = {0};
5373         int status;
5374         unsigned int pg_offset;
5375
5376         res->acl_len = 0;
5377         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5378                 goto out;
5379
5380         xdr_enter_page(xdr, xdr->buf->page_len);
5381
5382         /* Calculate the offset of the page data */
5383         pg_offset = xdr->buf->head[0].iov_len;
5384
5385         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5386                 goto out;
5387         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5388                 goto out;
5389
5390         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5391                 return -EIO;
5392         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5393
5394                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5395                  * are stored with the acl data to handle the problem of
5396                  * variable length bitmaps.*/
5397                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5398                 res->acl_len = attrlen;
5399
5400                 /* Check for receive buffer overflow */
5401                 if (res->acl_len > (xdr->nwords << 2) ||
5402                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5403                         res->acl_flags |= NFS4_ACL_TRUNC;
5404                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5405                                         attrlen, xdr->nwords << 2);
5406                 }
5407         } else
5408                 status = -EOPNOTSUPP;
5409
5410 out:
5411         return status;
5412 }
5413
5414 static int
5415 decode_savefh(struct xdr_stream *xdr)
5416 {
5417         return decode_op_hdr(xdr, OP_SAVEFH);
5418 }
5419
5420 static int decode_setattr(struct xdr_stream *xdr)
5421 {
5422         __be32 *p;
5423         uint32_t bmlen;
5424         int status;
5425
5426         status = decode_op_hdr(xdr, OP_SETATTR);
5427         if (status)
5428                 return status;
5429         p = xdr_inline_decode(xdr, 4);
5430         if (unlikely(!p))
5431                 goto out_overflow;
5432         bmlen = be32_to_cpup(p);
5433         p = xdr_inline_decode(xdr, bmlen << 2);
5434         if (likely(p))
5435                 return 0;
5436 out_overflow:
5437         print_overflow_msg(__func__, xdr);
5438         return -EIO;
5439 }
5440
5441 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5442 {
5443         __be32 *p;
5444         uint32_t opnum;
5445         int32_t nfserr;
5446
5447         p = xdr_inline_decode(xdr, 8);
5448         if (unlikely(!p))
5449                 goto out_overflow;
5450         opnum = be32_to_cpup(p++);
5451         if (opnum != OP_SETCLIENTID) {
5452                 dprintk("nfs: decode_setclientid: Server returned operation"
5453                         " %d\n", opnum);
5454                 return -EIO;
5455         }
5456         nfserr = be32_to_cpup(p);
5457         if (nfserr == NFS_OK) {
5458                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5459                 if (unlikely(!p))
5460                         goto out_overflow;
5461                 p = xdr_decode_hyper(p, &res->clientid);
5462                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5463         } else if (nfserr == NFSERR_CLID_INUSE) {
5464                 uint32_t len;
5465
5466                 /* skip netid string */
5467                 p = xdr_inline_decode(xdr, 4);
5468                 if (unlikely(!p))
5469                         goto out_overflow;
5470                 len = be32_to_cpup(p);
5471                 p = xdr_inline_decode(xdr, len);
5472                 if (unlikely(!p))
5473                         goto out_overflow;
5474
5475                 /* skip uaddr string */
5476                 p = xdr_inline_decode(xdr, 4);
5477                 if (unlikely(!p))
5478                         goto out_overflow;
5479                 len = be32_to_cpup(p);
5480                 p = xdr_inline_decode(xdr, len);
5481                 if (unlikely(!p))
5482                         goto out_overflow;
5483                 return -NFSERR_CLID_INUSE;
5484         } else
5485                 return nfs4_stat_to_errno(nfserr);
5486
5487         return 0;
5488 out_overflow:
5489         print_overflow_msg(__func__, xdr);
5490         return -EIO;
5491 }
5492
5493 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5494 {
5495         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5496 }
5497
5498 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5499 {
5500         __be32 *p;
5501         int status;
5502
5503         status = decode_op_hdr(xdr, OP_WRITE);
5504         if (status)
5505                 return status;
5506
5507         p = xdr_inline_decode(xdr, 8);
5508         if (unlikely(!p))
5509                 goto out_overflow;
5510         res->count = be32_to_cpup(p++);
5511         res->verf->committed = be32_to_cpup(p++);
5512         return decode_write_verifier(xdr, &res->verf->verifier);
5513 out_overflow:
5514         print_overflow_msg(__func__, xdr);
5515         return -EIO;
5516 }
5517
5518 static int decode_delegreturn(struct xdr_stream *xdr)
5519 {
5520         return decode_op_hdr(xdr, OP_DELEGRETURN);
5521 }
5522
5523 static int decode_secinfo_gss(struct xdr_stream *xdr,
5524                               struct nfs4_secinfo4 *flavor)
5525 {
5526         u32 oid_len;
5527         __be32 *p;
5528
5529         p = xdr_inline_decode(xdr, 4);
5530         if (unlikely(!p))
5531                 goto out_overflow;
5532         oid_len = be32_to_cpup(p);
5533         if (oid_len > GSS_OID_MAX_LEN)
5534                 goto out_err;
5535
5536         p = xdr_inline_decode(xdr, oid_len);
5537         if (unlikely(!p))
5538                 goto out_overflow;
5539         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5540         flavor->flavor_info.oid.len = oid_len;
5541
5542         p = xdr_inline_decode(xdr, 8);
5543         if (unlikely(!p))
5544                 goto out_overflow;
5545         flavor->flavor_info.qop = be32_to_cpup(p++);
5546         flavor->flavor_info.service = be32_to_cpup(p);
5547
5548         return 0;
5549
5550 out_overflow:
5551         print_overflow_msg(__func__, xdr);
5552         return -EIO;
5553 out_err:
5554         return -EINVAL;
5555 }
5556
5557 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5558 {
5559         struct nfs4_secinfo4 *sec_flavor;
5560         unsigned int i, num_flavors;
5561         int status;
5562         __be32 *p;
5563
5564         p = xdr_inline_decode(xdr, 4);
5565         if (unlikely(!p))
5566                 goto out_overflow;
5567
5568         res->flavors->num_flavors = 0;
5569         num_flavors = be32_to_cpup(p);
5570
5571         for (i = 0; i < num_flavors; i++) {
5572                 sec_flavor = &res->flavors->flavors[i];
5573                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5574                         break;
5575
5576                 p = xdr_inline_decode(xdr, 4);
5577                 if (unlikely(!p))
5578                         goto out_overflow;
5579                 sec_flavor->flavor = be32_to_cpup(p);
5580
5581                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5582                         status = decode_secinfo_gss(xdr, sec_flavor);
5583                         if (status)
5584                                 goto out;
5585                 }
5586                 res->flavors->num_flavors++;
5587         }
5588
5589         status = 0;
5590 out:
5591         return status;
5592 out_overflow:
5593         print_overflow_msg(__func__, xdr);
5594         return -EIO;
5595 }
5596
5597 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5598 {
5599         int status = decode_op_hdr(xdr, OP_SECINFO);
5600         if (status)
5601                 return status;
5602         return decode_secinfo_common(xdr, res);
5603 }
5604
5605 #if defined(CONFIG_NFS_V4_1)
5606 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5607 {
5608         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5609         if (status)
5610                 return status;
5611         return decode_secinfo_common(xdr, res);
5612 }
5613
5614 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5615 {
5616         __be32 *p;
5617         uint32_t bitmap_words;
5618         unsigned int i;
5619
5620         p = xdr_inline_decode(xdr, 4);
5621         if (!p)
5622                 return -EIO;
5623         bitmap_words = be32_to_cpup(p++);
5624         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5625                 return -EIO;
5626         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5627         for (i = 0; i < bitmap_words; i++)
5628                 op_map->u.words[i] = be32_to_cpup(p++);
5629
5630         return 0;
5631 }
5632
5633 static int decode_exchange_id(struct xdr_stream *xdr,
5634                               struct nfs41_exchange_id_res *res)
5635 {
5636         __be32 *p;
5637         uint32_t dummy;
5638         char *dummy_str;
5639         int status;
5640         uint32_t impl_id_count;
5641
5642         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5643         if (status)
5644                 return status;
5645
5646         p = xdr_inline_decode(xdr, 8);
5647         if (unlikely(!p))
5648                 goto out_overflow;
5649         xdr_decode_hyper(p, &res->clientid);
5650         p = xdr_inline_decode(xdr, 12);
5651         if (unlikely(!p))
5652                 goto out_overflow;
5653         res->seqid = be32_to_cpup(p++);
5654         res->flags = be32_to_cpup(p++);
5655
5656         res->state_protect.how = be32_to_cpup(p);
5657         switch (res->state_protect.how) {
5658         case SP4_NONE:
5659                 break;
5660         case SP4_MACH_CRED:
5661                 status = decode_op_map(xdr, &res->state_protect.enforce);
5662                 if (status)
5663                         return status;
5664                 status = decode_op_map(xdr, &res->state_protect.allow);
5665                 if (status)
5666                         return status;
5667                 break;
5668         default:
5669                 WARN_ON_ONCE(1);
5670                 return -EIO;
5671         }
5672
5673         /* server_owner4.so_minor_id */
5674         p = xdr_inline_decode(xdr, 8);
5675         if (unlikely(!p))
5676                 goto out_overflow;
5677         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5678
5679         /* server_owner4.so_major_id */
5680         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5681         if (unlikely(status))
5682                 return status;
5683         memcpy(res->server_owner->major_id, dummy_str, dummy);
5684         res->server_owner->major_id_sz = dummy;
5685
5686         /* server_scope4 */
5687         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5688         if (unlikely(status))
5689                 return status;
5690         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5691         res->server_scope->server_scope_sz = dummy;
5692
5693         /* Implementation Id */
5694         p = xdr_inline_decode(xdr, 4);
5695         if (unlikely(!p))
5696                 goto out_overflow;
5697         impl_id_count = be32_to_cpup(p++);
5698
5699         if (impl_id_count) {
5700                 /* nii_domain */
5701                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5702                 if (unlikely(status))
5703                         return status;
5704                 memcpy(res->impl_id->domain, dummy_str, dummy);
5705
5706                 /* nii_name */
5707                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5708                 if (unlikely(status))
5709                         return status;
5710                 memcpy(res->impl_id->name, dummy_str, dummy);
5711
5712                 /* nii_date */
5713                 p = xdr_inline_decode(xdr, 12);
5714                 if (unlikely(!p))
5715                         goto out_overflow;
5716                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5717                 res->impl_id->date.nseconds = be32_to_cpup(p);
5718
5719                 /* if there's more than one entry, ignore the rest */
5720         }
5721         return 0;
5722 out_overflow:
5723         print_overflow_msg(__func__, xdr);
5724         return -EIO;
5725 }
5726
5727 static int decode_chan_attrs(struct xdr_stream *xdr,
5728                              struct nfs4_channel_attrs *attrs)
5729 {
5730         __be32 *p;
5731         u32 nr_attrs, val;
5732
5733         p = xdr_inline_decode(xdr, 28);
5734         if (unlikely(!p))
5735                 goto out_overflow;
5736         val = be32_to_cpup(p++);        /* headerpadsz */
5737         if (val)
5738                 return -EINVAL;         /* no support for header padding yet */
5739         attrs->max_rqst_sz = be32_to_cpup(p++);
5740         attrs->max_resp_sz = be32_to_cpup(p++);
5741         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5742         attrs->max_ops = be32_to_cpup(p++);
5743         attrs->max_reqs = be32_to_cpup(p++);
5744         nr_attrs = be32_to_cpup(p);
5745         if (unlikely(nr_attrs > 1)) {
5746                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5747                         "count %u\n", __func__, nr_attrs);
5748                 return -EINVAL;
5749         }
5750         if (nr_attrs == 1) {
5751                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5752                 if (unlikely(!p))
5753                         goto out_overflow;
5754         }
5755         return 0;
5756 out_overflow:
5757         print_overflow_msg(__func__, xdr);
5758         return -EIO;
5759 }
5760
5761 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5762 {
5763         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5764 }
5765
5766 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5767                                 struct nfs41_bind_conn_to_session_res *res)
5768 {
5769         __be32 *p;
5770         int status;
5771
5772         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5773         if (!status)
5774                 status = decode_sessionid(xdr, &res->sessionid);
5775         if (unlikely(status))
5776                 return status;
5777
5778         /* dir flags, rdma mode bool */
5779         p = xdr_inline_decode(xdr, 8);
5780         if (unlikely(!p))
5781                 goto out_overflow;
5782
5783         res->dir = be32_to_cpup(p++);
5784         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5785                 return -EIO;
5786         if (be32_to_cpup(p) == 0)
5787                 res->use_conn_in_rdma_mode = false;
5788         else
5789                 res->use_conn_in_rdma_mode = true;
5790
5791         return 0;
5792 out_overflow:
5793         print_overflow_msg(__func__, xdr);
5794         return -EIO;
5795 }
5796
5797 static int decode_create_session(struct xdr_stream *xdr,
5798                                  struct nfs41_create_session_res *res)
5799 {
5800         __be32 *p;
5801         int status;
5802
5803         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5804         if (!status)
5805                 status = decode_sessionid(xdr, &res->sessionid);
5806         if (unlikely(status))
5807                 return status;
5808
5809         /* seqid, flags */
5810         p = xdr_inline_decode(xdr, 8);
5811         if (unlikely(!p))
5812                 goto out_overflow;
5813         res->seqid = be32_to_cpup(p++);
5814         res->flags = be32_to_cpup(p);
5815
5816         /* Channel attributes */
5817         status = decode_chan_attrs(xdr, &res->fc_attrs);
5818         if (!status)
5819                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5820         return status;
5821 out_overflow:
5822         print_overflow_msg(__func__, xdr);
5823         return -EIO;
5824 }
5825
5826 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5827 {
5828         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5829 }
5830
5831 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5832 {
5833         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5834 }
5835
5836 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5837 {
5838         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5839 }
5840 #endif /* CONFIG_NFS_V4_1 */
5841
5842 static int decode_sequence(struct xdr_stream *xdr,
5843                            struct nfs4_sequence_res *res,
5844                            struct rpc_rqst *rqstp)
5845 {
5846 #if defined(CONFIG_NFS_V4_1)
5847         struct nfs4_session *session;
5848         struct nfs4_sessionid id;
5849         u32 dummy;
5850         int status;
5851         __be32 *p;
5852
5853         if (res->sr_slot == NULL)
5854                 return 0;
5855         if (!res->sr_slot->table->session)
5856                 return 0;
5857
5858         status = decode_op_hdr(xdr, OP_SEQUENCE);
5859         if (!status)
5860                 status = decode_sessionid(xdr, &id);
5861         if (unlikely(status))
5862                 goto out_err;
5863
5864         /*
5865          * If the server returns different values for sessionID, slotID or
5866          * sequence number, the server is looney tunes.
5867          */
5868         status = -EREMOTEIO;
5869         session = res->sr_slot->table->session;
5870
5871         if (memcmp(id.data, session->sess_id.data,
5872                    NFS4_MAX_SESSIONID_LEN)) {
5873                 dprintk("%s Invalid session id\n", __func__);
5874                 goto out_err;
5875         }
5876
5877         p = xdr_inline_decode(xdr, 20);
5878         if (unlikely(!p))
5879                 goto out_overflow;
5880
5881         /* seqid */
5882         dummy = be32_to_cpup(p++);
5883         if (dummy != res->sr_slot->seq_nr) {
5884                 dprintk("%s Invalid sequence number\n", __func__);
5885                 goto out_err;
5886         }
5887         /* slot id */
5888         dummy = be32_to_cpup(p++);
5889         if (dummy != res->sr_slot->slot_nr) {
5890                 dprintk("%s Invalid slot id\n", __func__);
5891                 goto out_err;
5892         }
5893         /* highest slot id */
5894         res->sr_highest_slotid = be32_to_cpup(p++);
5895         /* target highest slot id */
5896         res->sr_target_highest_slotid = be32_to_cpup(p++);
5897         /* result flags */
5898         res->sr_status_flags = be32_to_cpup(p);
5899         status = 0;
5900 out_err:
5901         res->sr_status = status;
5902         return status;
5903 out_overflow:
5904         print_overflow_msg(__func__, xdr);
5905         status = -EIO;
5906         goto out_err;
5907 #else  /* CONFIG_NFS_V4_1 */
5908         return 0;
5909 #endif /* CONFIG_NFS_V4_1 */
5910 }
5911
5912 #if defined(CONFIG_NFS_V4_1)
5913 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5914 {
5915         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5916         return decode_stateid(xdr, stateid);
5917 }
5918
5919 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5920                                 struct nfs4_getdeviceinfo_res *res)
5921 {
5922         struct pnfs_device *pdev = res->pdev;
5923         __be32 *p;
5924         uint32_t len, type;
5925         int status;
5926
5927         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5928         if (status) {
5929                 if (status == -ETOOSMALL) {
5930                         p = xdr_inline_decode(xdr, 4);
5931                         if (unlikely(!p))
5932                                 goto out_overflow;
5933                         pdev->mincount = be32_to_cpup(p);
5934                         dprintk("%s: Min count too small. mincnt = %u\n",
5935                                 __func__, pdev->mincount);
5936                 }
5937                 return status;
5938         }
5939
5940         p = xdr_inline_decode(xdr, 8);
5941         if (unlikely(!p))
5942                 goto out_overflow;
5943         type = be32_to_cpup(p++);
5944         if (type != pdev->layout_type) {
5945                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5946                         __func__, pdev->layout_type, type);
5947                 return -EINVAL;
5948         }
5949         /*
5950          * Get the length of the opaque device_addr4. xdr_read_pages places
5951          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5952          * and places the remaining xdr data in xdr_buf->tail
5953          */
5954         pdev->mincount = be32_to_cpup(p);
5955         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5956                 goto out_overflow;
5957
5958         /* Parse notification bitmap, verifying that it is zero. */
5959         p = xdr_inline_decode(xdr, 4);
5960         if (unlikely(!p))
5961                 goto out_overflow;
5962         len = be32_to_cpup(p);
5963         if (len) {
5964                 uint32_t i;
5965
5966                 p = xdr_inline_decode(xdr, 4 * len);
5967                 if (unlikely(!p))
5968                         goto out_overflow;
5969
5970                 res->notification = be32_to_cpup(p++);
5971                 for (i = 1; i < len; i++) {
5972                         if (be32_to_cpup(p++)) {
5973                                 dprintk("%s: unsupported notification\n",
5974                                         __func__);
5975                                 return -EIO;
5976                         }
5977                 }
5978         }
5979         return 0;
5980 out_overflow:
5981         print_overflow_msg(__func__, xdr);
5982         return -EIO;
5983 }
5984
5985 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5986                             struct nfs4_layoutget_res *res)
5987 {
5988         __be32 *p;
5989         int status;
5990         u32 layout_count;
5991         u32 recvd;
5992
5993         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5994         if (status)
5995                 return status;
5996         p = xdr_inline_decode(xdr, 4);
5997         if (unlikely(!p))
5998                 goto out_overflow;
5999         res->return_on_close = be32_to_cpup(p);
6000         decode_layout_stateid(xdr, &res->stateid);
6001         p = xdr_inline_decode(xdr, 4);
6002         if (unlikely(!p))
6003                 goto out_overflow;
6004         layout_count = be32_to_cpup(p);
6005         if (!layout_count) {
6006                 dprintk("%s: server responded with empty layout array\n",
6007                         __func__);
6008                 return -EINVAL;
6009         }
6010
6011         p = xdr_inline_decode(xdr, 28);
6012         if (unlikely(!p))
6013                 goto out_overflow;
6014         p = xdr_decode_hyper(p, &res->range.offset);
6015         p = xdr_decode_hyper(p, &res->range.length);
6016         res->range.iomode = be32_to_cpup(p++);
6017         res->type = be32_to_cpup(p++);
6018         res->layoutp->len = be32_to_cpup(p);
6019
6020         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6021                 __func__,
6022                 (unsigned long)res->range.offset,
6023                 (unsigned long)res->range.length,
6024                 res->range.iomode,
6025                 res->type,
6026                 res->layoutp->len);
6027
6028         recvd = xdr_read_pages(xdr, res->layoutp->len);
6029         if (res->layoutp->len > recvd) {
6030                 dprintk("NFS: server cheating in layoutget reply: "
6031                                 "layout len %u > recvd %u\n",
6032                                 res->layoutp->len, recvd);
6033                 return -EINVAL;
6034         }
6035
6036         if (layout_count > 1) {
6037                 /* We only handle a length one array at the moment.  Any
6038                  * further entries are just ignored.  Note that this means
6039                  * the client may see a response that is less than the
6040                  * minimum it requested.
6041                  */
6042                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6043                         __func__, layout_count);
6044         }
6045
6046         return 0;
6047 out_overflow:
6048         print_overflow_msg(__func__, xdr);
6049         return -EIO;
6050 }
6051
6052 static int decode_layoutreturn(struct xdr_stream *xdr,
6053                                struct nfs4_layoutreturn_res *res)
6054 {
6055         __be32 *p;
6056         int status;
6057
6058         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6059         if (status)
6060                 return status;
6061         p = xdr_inline_decode(xdr, 4);
6062         if (unlikely(!p))
6063                 goto out_overflow;
6064         res->lrs_present = be32_to_cpup(p);
6065         if (res->lrs_present)
6066                 status = decode_layout_stateid(xdr, &res->stateid);
6067         return status;
6068 out_overflow:
6069         print_overflow_msg(__func__, xdr);
6070         return -EIO;
6071 }
6072
6073 static int decode_layoutcommit(struct xdr_stream *xdr,
6074                                struct rpc_rqst *req,
6075                                struct nfs4_layoutcommit_res *res)
6076 {
6077         __be32 *p;
6078         __u32 sizechanged;
6079         int status;
6080
6081         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6082         res->status = status;
6083         if (status)
6084                 return status;
6085
6086         p = xdr_inline_decode(xdr, 4);
6087         if (unlikely(!p))
6088                 goto out_overflow;
6089         sizechanged = be32_to_cpup(p);
6090
6091         if (sizechanged) {
6092                 /* throw away new size */
6093                 p = xdr_inline_decode(xdr, 8);
6094                 if (unlikely(!p))
6095                         goto out_overflow;
6096         }
6097         return 0;
6098 out_overflow:
6099         print_overflow_msg(__func__, xdr);
6100         return -EIO;
6101 }
6102
6103 static int decode_test_stateid(struct xdr_stream *xdr,
6104                                struct nfs41_test_stateid_res *res)
6105 {
6106         __be32 *p;
6107         int status;
6108         int num_res;
6109
6110         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6111         if (status)
6112                 return status;
6113
6114         p = xdr_inline_decode(xdr, 4);
6115         if (unlikely(!p))
6116                 goto out_overflow;
6117         num_res = be32_to_cpup(p++);
6118         if (num_res != 1)
6119                 goto out;
6120
6121         p = xdr_inline_decode(xdr, 4);
6122         if (unlikely(!p))
6123                 goto out_overflow;
6124         res->status = be32_to_cpup(p++);
6125
6126         return status;
6127 out_overflow:
6128         print_overflow_msg(__func__, xdr);
6129 out:
6130         return -EIO;
6131 }
6132
6133 static int decode_free_stateid(struct xdr_stream *xdr,
6134                                struct nfs41_free_stateid_res *res)
6135 {
6136         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6137         return res->status;
6138 }
6139 #else
6140 static inline
6141 int decode_layoutreturn(struct xdr_stream *xdr,
6142                                struct nfs4_layoutreturn_res *res)
6143 {
6144         return 0;
6145 }
6146 #endif /* CONFIG_NFS_V4_1 */
6147
6148 /*
6149  * END OF "GENERIC" DECODE ROUTINES.
6150  */
6151
6152 /*
6153  * Decode OPEN_DOWNGRADE response
6154  */
6155 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6156                                        struct xdr_stream *xdr,
6157                                        void *data)
6158 {
6159         struct nfs_closeres *res = data;
6160         struct compound_hdr hdr;
6161         int status;
6162
6163         status = decode_compound_hdr(xdr, &hdr);
6164         if (status)
6165                 goto out;
6166         status = decode_sequence(xdr, &res->seq_res, rqstp);
6167         if (status)
6168                 goto out;
6169         status = decode_putfh(xdr);
6170         if (status)
6171                 goto out;
6172         if (res->lr_res) {
6173                 status = decode_layoutreturn(xdr, res->lr_res);
6174                 res->lr_ret = status;
6175                 if (status)
6176                         goto out;
6177         }
6178         status = decode_open_downgrade(xdr, res);
6179 out:
6180         return status;
6181 }
6182
6183 /*
6184  * Decode ACCESS response
6185  */
6186 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6187                                void *data)
6188 {
6189         struct nfs4_accessres *res = data;
6190         struct compound_hdr hdr;
6191         int status;
6192
6193         status = decode_compound_hdr(xdr, &hdr);
6194         if (status)
6195                 goto out;
6196         status = decode_sequence(xdr, &res->seq_res, rqstp);
6197         if (status)
6198                 goto out;
6199         status = decode_putfh(xdr);
6200         if (status != 0)
6201                 goto out;
6202         status = decode_access(xdr, &res->supported, &res->access);
6203         if (status != 0)
6204                 goto out;
6205         decode_getfattr(xdr, res->fattr, res->server);
6206 out:
6207         return status;
6208 }
6209
6210 /*
6211  * Decode LOOKUP response
6212  */
6213 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6214                                void *data)
6215 {
6216         struct nfs4_lookup_res *res = data;
6217         struct compound_hdr hdr;
6218         int status;
6219
6220         status = decode_compound_hdr(xdr, &hdr);
6221         if (status)
6222                 goto out;
6223         status = decode_sequence(xdr, &res->seq_res, rqstp);
6224         if (status)
6225                 goto out;
6226         status = decode_putfh(xdr);
6227         if (status)
6228                 goto out;
6229         status = decode_lookup(xdr);
6230         if (status)
6231                 goto out;
6232         status = decode_getfh(xdr, res->fh);
6233         if (status)
6234                 goto out;
6235         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6236 out:
6237         return status;
6238 }
6239
6240 /*
6241  * Decode LOOKUP_ROOT response
6242  */
6243 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6244                                     struct xdr_stream *xdr,
6245                                     void *data)
6246 {
6247         struct nfs4_lookup_res *res = data;
6248         struct compound_hdr hdr;
6249         int status;
6250
6251         status = decode_compound_hdr(xdr, &hdr);
6252         if (status)
6253                 goto out;
6254         status = decode_sequence(xdr, &res->seq_res, rqstp);
6255         if (status)
6256                 goto out;
6257         status = decode_putrootfh(xdr);
6258         if (status)
6259                 goto out;
6260         status = decode_getfh(xdr, res->fh);
6261         if (status == 0)
6262                 status = decode_getfattr_label(xdr, res->fattr,
6263                                                 res->label, res->server);
6264 out:
6265         return status;
6266 }
6267
6268 /*
6269  * Decode REMOVE response
6270  */
6271 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6272                                void *data)
6273 {
6274         struct nfs_removeres *res = data;
6275         struct compound_hdr hdr;
6276         int status;
6277
6278         status = decode_compound_hdr(xdr, &hdr);
6279         if (status)
6280                 goto out;
6281         status = decode_sequence(xdr, &res->seq_res, rqstp);
6282         if (status)
6283                 goto out;
6284         status = decode_putfh(xdr);
6285         if (status)
6286                 goto out;
6287         status = decode_remove(xdr, &res->cinfo);
6288 out:
6289         return status;
6290 }
6291
6292 /*
6293  * Decode RENAME response
6294  */
6295 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6296                                void *data)
6297 {
6298         struct nfs_renameres *res = data;
6299         struct compound_hdr hdr;
6300         int status;
6301
6302         status = decode_compound_hdr(xdr, &hdr);
6303         if (status)
6304                 goto out;
6305         status = decode_sequence(xdr, &res->seq_res, rqstp);
6306         if (status)
6307                 goto out;
6308         status = decode_putfh(xdr);
6309         if (status)
6310                 goto out;
6311         status = decode_savefh(xdr);
6312         if (status)
6313                 goto out;
6314         status = decode_putfh(xdr);
6315         if (status)
6316                 goto out;
6317         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6318 out:
6319         return status;
6320 }
6321
6322 /*
6323  * Decode LINK response
6324  */
6325 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6326                              void *data)
6327 {
6328         struct nfs4_link_res *res = data;
6329         struct compound_hdr hdr;
6330         int status;
6331
6332         status = decode_compound_hdr(xdr, &hdr);
6333         if (status)
6334                 goto out;
6335         status = decode_sequence(xdr, &res->seq_res, rqstp);
6336         if (status)
6337                 goto out;
6338         status = decode_putfh(xdr);
6339         if (status)
6340                 goto out;
6341         status = decode_savefh(xdr);
6342         if (status)
6343                 goto out;
6344         status = decode_putfh(xdr);
6345         if (status)
6346                 goto out;
6347         status = decode_link(xdr, &res->cinfo);
6348         if (status)
6349                 goto out;
6350         /*
6351          * Note order: OP_LINK leaves the directory as the current
6352          *             filehandle.
6353          */
6354         status = decode_restorefh(xdr);
6355         if (status)
6356                 goto out;
6357         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6358 out:
6359         return status;
6360 }
6361
6362 /*
6363  * Decode CREATE response
6364  */
6365 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6366                                void *data)
6367 {
6368         struct nfs4_create_res *res = data;
6369         struct compound_hdr hdr;
6370         int status;
6371
6372         status = decode_compound_hdr(xdr, &hdr);
6373         if (status)
6374                 goto out;
6375         status = decode_sequence(xdr, &res->seq_res, rqstp);
6376         if (status)
6377                 goto out;
6378         status = decode_putfh(xdr);
6379         if (status)
6380                 goto out;
6381         status = decode_create(xdr, &res->dir_cinfo);
6382         if (status)
6383                 goto out;
6384         status = decode_getfh(xdr, res->fh);
6385         if (status)
6386                 goto out;
6387         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6388 out:
6389         return status;
6390 }
6391
6392 /*
6393  * Decode SYMLINK response
6394  */
6395 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6396                                 void *res)
6397 {
6398         return nfs4_xdr_dec_create(rqstp, xdr, res);
6399 }
6400
6401 /*
6402  * Decode GETATTR response
6403  */
6404 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6405                                 void *data)
6406 {
6407         struct nfs4_getattr_res *res = data;
6408         struct compound_hdr hdr;
6409         int status;
6410
6411         status = decode_compound_hdr(xdr, &hdr);
6412         if (status)
6413                 goto out;
6414         status = decode_sequence(xdr, &res->seq_res, rqstp);
6415         if (status)
6416                 goto out;
6417         status = decode_putfh(xdr);
6418         if (status)
6419                 goto out;
6420         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6421 out:
6422         return status;
6423 }
6424
6425 /*
6426  * Encode an SETACL request
6427  */
6428 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6429                                 const void *data)
6430 {
6431         const struct nfs_setaclargs *args = data;
6432         struct compound_hdr hdr = {
6433                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6434         };
6435
6436         encode_compound_hdr(xdr, req, &hdr);
6437         encode_sequence(xdr, &args->seq_args, &hdr);
6438         encode_putfh(xdr, args->fh, &hdr);
6439         encode_setacl(xdr, args, &hdr);
6440         encode_nops(&hdr);
6441 }
6442
6443 /*
6444  * Decode SETACL response
6445  */
6446 static int
6447 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6448                     void *data)
6449 {
6450         struct nfs_setaclres *res = data;
6451         struct compound_hdr hdr;
6452         int status;
6453
6454         status = decode_compound_hdr(xdr, &hdr);
6455         if (status)
6456                 goto out;
6457         status = decode_sequence(xdr, &res->seq_res, rqstp);
6458         if (status)
6459                 goto out;
6460         status = decode_putfh(xdr);
6461         if (status)
6462                 goto out;
6463         status = decode_setattr(xdr);
6464 out:
6465         return status;
6466 }
6467
6468 /*
6469  * Decode GETACL response
6470  */
6471 static int
6472 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6473                     void *data)
6474 {
6475         struct nfs_getaclres *res = data;
6476         struct compound_hdr hdr;
6477         int status;
6478
6479         if (res->acl_scratch != NULL) {
6480                 void *p = page_address(res->acl_scratch);
6481                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6482         }
6483         status = decode_compound_hdr(xdr, &hdr);
6484         if (status)
6485                 goto out;
6486         status = decode_sequence(xdr, &res->seq_res, rqstp);
6487         if (status)
6488                 goto out;
6489         status = decode_putfh(xdr);
6490         if (status)
6491                 goto out;
6492         status = decode_getacl(xdr, rqstp, res);
6493
6494 out:
6495         return status;
6496 }
6497
6498 /*
6499  * Decode CLOSE response
6500  */
6501 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6502                               void *data)
6503 {
6504         struct nfs_closeres *res = data;
6505         struct compound_hdr hdr;
6506         int status;
6507
6508         status = decode_compound_hdr(xdr, &hdr);
6509         if (status)
6510                 goto out;
6511         status = decode_sequence(xdr, &res->seq_res, rqstp);
6512         if (status)
6513                 goto out;
6514         status = decode_putfh(xdr);
6515         if (status)
6516                 goto out;
6517         if (res->lr_res) {
6518                 status = decode_layoutreturn(xdr, res->lr_res);
6519                 res->lr_ret = status;
6520                 if (status)
6521                         goto out;
6522         }
6523         if (res->fattr != NULL) {
6524                 status = decode_getfattr(xdr, res->fattr, res->server);
6525                 if (status != 0)
6526                         goto out;
6527         }
6528         status = decode_close(xdr, res);
6529 out:
6530         return status;
6531 }
6532
6533 /*
6534  * Decode OPEN response
6535  */
6536 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6537                              void *data)
6538 {
6539         struct nfs_openres *res = data;
6540         struct compound_hdr hdr;
6541         int status;
6542
6543         status = decode_compound_hdr(xdr, &hdr);
6544         if (status)
6545                 goto out;
6546         status = decode_sequence(xdr, &res->seq_res, rqstp);
6547         if (status)
6548                 goto out;
6549         status = decode_putfh(xdr);
6550         if (status)
6551                 goto out;
6552         status = decode_open(xdr, res);
6553         if (status)
6554                 goto out;
6555         status = decode_getfh(xdr, &res->fh);
6556         if (status)
6557                 goto out;
6558         if (res->access_request)
6559                 decode_access(xdr, &res->access_supported, &res->access_result);
6560         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6561 out:
6562         return status;
6563 }
6564
6565 /*
6566  * Decode OPEN_CONFIRM response
6567  */
6568 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6569                                      struct xdr_stream *xdr,
6570                                      void *data)
6571 {
6572         struct nfs_open_confirmres *res = data;
6573         struct compound_hdr hdr;
6574         int status;
6575
6576         status = decode_compound_hdr(xdr, &hdr);
6577         if (status)
6578                 goto out;
6579         status = decode_putfh(xdr);
6580         if (status)
6581                 goto out;
6582         status = decode_open_confirm(xdr, res);
6583 out:
6584         return status;
6585 }
6586
6587 /*
6588  * Decode OPEN response
6589  */
6590 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6591                                     struct xdr_stream *xdr,
6592                                     void *data)
6593 {
6594         struct nfs_openres *res = data;
6595         struct compound_hdr hdr;
6596         int status;
6597
6598         status = decode_compound_hdr(xdr, &hdr);
6599         if (status)
6600                 goto out;
6601         status = decode_sequence(xdr, &res->seq_res, rqstp);
6602         if (status)
6603                 goto out;
6604         status = decode_putfh(xdr);
6605         if (status)
6606                 goto out;
6607         status = decode_open(xdr, res);
6608         if (status)
6609                 goto out;
6610         if (res->access_request)
6611                 decode_access(xdr, &res->access_supported, &res->access_result);
6612         decode_getfattr(xdr, res->f_attr, res->server);
6613 out:
6614         return status;
6615 }
6616
6617 /*
6618  * Decode SETATTR response
6619  */
6620 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6621                                 struct xdr_stream *xdr,
6622                                 void *data)
6623 {
6624         struct nfs_setattrres *res = data;
6625         struct compound_hdr hdr;
6626         int status;
6627
6628         status = decode_compound_hdr(xdr, &hdr);
6629         if (status)
6630                 goto out;
6631         status = decode_sequence(xdr, &res->seq_res, rqstp);
6632         if (status)
6633                 goto out;
6634         status = decode_putfh(xdr);
6635         if (status)
6636                 goto out;
6637         status = decode_setattr(xdr);
6638         if (status)
6639                 goto out;
6640         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6641 out:
6642         return status;
6643 }
6644
6645 /*
6646  * Decode LOCK response
6647  */
6648 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6649                              void *data)
6650 {
6651         struct nfs_lock_res *res = data;
6652         struct compound_hdr hdr;
6653         int status;
6654
6655         status = decode_compound_hdr(xdr, &hdr);
6656         if (status)
6657                 goto out;
6658         status = decode_sequence(xdr, &res->seq_res, rqstp);
6659         if (status)
6660                 goto out;
6661         status = decode_putfh(xdr);
6662         if (status)
6663                 goto out;
6664         status = decode_lock(xdr, res);
6665 out:
6666         return status;
6667 }
6668
6669 /*
6670  * Decode LOCKT response
6671  */
6672 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6673                               void *data)
6674 {
6675         struct nfs_lockt_res *res = data;
6676         struct compound_hdr hdr;
6677         int status;
6678
6679         status = decode_compound_hdr(xdr, &hdr);
6680         if (status)
6681                 goto out;
6682         status = decode_sequence(xdr, &res->seq_res, rqstp);
6683         if (status)
6684                 goto out;
6685         status = decode_putfh(xdr);
6686         if (status)
6687                 goto out;
6688         status = decode_lockt(xdr, res);
6689 out:
6690         return status;
6691 }
6692
6693 /*
6694  * Decode LOCKU response
6695  */
6696 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6697                               void *data)
6698 {
6699         struct nfs_locku_res *res = data;
6700         struct compound_hdr hdr;
6701         int status;
6702
6703         status = decode_compound_hdr(xdr, &hdr);
6704         if (status)
6705                 goto out;
6706         status = decode_sequence(xdr, &res->seq_res, rqstp);
6707         if (status)
6708                 goto out;
6709         status = decode_putfh(xdr);
6710         if (status)
6711                 goto out;
6712         status = decode_locku(xdr, res);
6713 out:
6714         return status;
6715 }
6716
6717 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6718                                           struct xdr_stream *xdr, void *dummy)
6719 {
6720         struct compound_hdr hdr;
6721         int status;
6722
6723         status = decode_compound_hdr(xdr, &hdr);
6724         if (!status)
6725                 status = decode_release_lockowner(xdr);
6726         return status;
6727 }
6728
6729 /*
6730  * Decode READLINK response
6731  */
6732 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6733                                  struct xdr_stream *xdr,
6734                                  void *data)
6735 {
6736         struct nfs4_readlink_res *res = data;
6737         struct compound_hdr hdr;
6738         int status;
6739
6740         status = decode_compound_hdr(xdr, &hdr);
6741         if (status)
6742                 goto out;
6743         status = decode_sequence(xdr, &res->seq_res, rqstp);
6744         if (status)
6745                 goto out;
6746         status = decode_putfh(xdr);
6747         if (status)
6748                 goto out;
6749         status = decode_readlink(xdr, rqstp);
6750 out:
6751         return status;
6752 }
6753
6754 /*
6755  * Decode READDIR response
6756  */
6757 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6758                                 void *data)
6759 {
6760         struct nfs4_readdir_res *res = data;
6761         struct compound_hdr hdr;
6762         int status;
6763
6764         status = decode_compound_hdr(xdr, &hdr);
6765         if (status)
6766                 goto out;
6767         status = decode_sequence(xdr, &res->seq_res, rqstp);
6768         if (status)
6769                 goto out;
6770         status = decode_putfh(xdr);
6771         if (status)
6772                 goto out;
6773         status = decode_readdir(xdr, rqstp, res);
6774 out:
6775         return status;
6776 }
6777
6778 /*
6779  * Decode Read response
6780  */
6781 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6782                              void *data)
6783 {
6784         struct nfs_pgio_res *res = data;
6785         struct compound_hdr hdr;
6786         int status;
6787
6788         status = decode_compound_hdr(xdr, &hdr);
6789         res->op_status = hdr.status;
6790         if (status)
6791                 goto out;
6792         status = decode_sequence(xdr, &res->seq_res, rqstp);
6793         if (status)
6794                 goto out;
6795         status = decode_putfh(xdr);
6796         if (status)
6797                 goto out;
6798         status = decode_read(xdr, rqstp, res);
6799         if (!status)
6800                 status = res->count;
6801 out:
6802         return status;
6803 }
6804
6805 /*
6806  * Decode WRITE response
6807  */
6808 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6809                               void *data)
6810 {
6811         struct nfs_pgio_res *res = data;
6812         struct compound_hdr hdr;
6813         int status;
6814
6815         status = decode_compound_hdr(xdr, &hdr);
6816         res->op_status = hdr.status;
6817         if (status)
6818                 goto out;
6819         status = decode_sequence(xdr, &res->seq_res, rqstp);
6820         if (status)
6821                 goto out;
6822         status = decode_putfh(xdr);
6823         if (status)
6824                 goto out;
6825         status = decode_write(xdr, res);
6826         if (status)
6827                 goto out;
6828         if (res->fattr)
6829                 decode_getfattr(xdr, res->fattr, res->server);
6830         if (!status)
6831                 status = res->count;
6832 out:
6833         return status;
6834 }
6835
6836 /*
6837  * Decode COMMIT response
6838  */
6839 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6840                                void *data)
6841 {
6842         struct nfs_commitres *res = data;
6843         struct compound_hdr hdr;
6844         int status;
6845
6846         status = decode_compound_hdr(xdr, &hdr);
6847         res->op_status = hdr.status;
6848         if (status)
6849                 goto out;
6850         status = decode_sequence(xdr, &res->seq_res, rqstp);
6851         if (status)
6852                 goto out;
6853         status = decode_putfh(xdr);
6854         if (status)
6855                 goto out;
6856         status = decode_commit(xdr, res);
6857 out:
6858         return status;
6859 }
6860
6861 /*
6862  * Decode FSINFO response
6863  */
6864 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6865                                void *data)
6866 {
6867         struct nfs4_fsinfo_res *res = data;
6868         struct compound_hdr hdr;
6869         int status;
6870
6871         status = decode_compound_hdr(xdr, &hdr);
6872         if (!status)
6873                 status = decode_sequence(xdr, &res->seq_res, req);
6874         if (!status)
6875                 status = decode_putfh(xdr);
6876         if (!status)
6877                 status = decode_fsinfo(xdr, res->fsinfo);
6878         return status;
6879 }
6880
6881 /*
6882  * Decode PATHCONF response
6883  */
6884 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6885                                  void *data)
6886 {
6887         struct nfs4_pathconf_res *res = data;
6888         struct compound_hdr hdr;
6889         int status;
6890
6891         status = decode_compound_hdr(xdr, &hdr);
6892         if (!status)
6893                 status = decode_sequence(xdr, &res->seq_res, req);
6894         if (!status)
6895                 status = decode_putfh(xdr);
6896         if (!status)
6897                 status = decode_pathconf(xdr, res->pathconf);
6898         return status;
6899 }
6900
6901 /*
6902  * Decode STATFS response
6903  */
6904 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6905                                void *data)
6906 {
6907         struct nfs4_statfs_res *res = data;
6908         struct compound_hdr hdr;
6909         int status;
6910
6911         status = decode_compound_hdr(xdr, &hdr);
6912         if (!status)
6913                 status = decode_sequence(xdr, &res->seq_res, req);
6914         if (!status)
6915                 status = decode_putfh(xdr);
6916         if (!status)
6917                 status = decode_statfs(xdr, res->fsstat);
6918         return status;
6919 }
6920
6921 /*
6922  * Decode GETATTR_BITMAP response
6923  */
6924 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6925                                     struct xdr_stream *xdr,
6926                                     void *data)
6927 {
6928         struct nfs4_server_caps_res *res = data;
6929         struct compound_hdr hdr;
6930         int status;
6931
6932         status = decode_compound_hdr(xdr, &hdr);
6933         if (status)
6934                 goto out;
6935         status = decode_sequence(xdr, &res->seq_res, req);
6936         if (status)
6937                 goto out;
6938         status = decode_putfh(xdr);
6939         if (status)
6940                 goto out;
6941         status = decode_server_caps(xdr, res);
6942 out:
6943         return status;
6944 }
6945
6946 /*
6947  * Decode RENEW response
6948  */
6949 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6950                               void *__unused)
6951 {
6952         struct compound_hdr hdr;
6953         int status;
6954
6955         status = decode_compound_hdr(xdr, &hdr);
6956         if (!status)
6957                 status = decode_renew(xdr);
6958         return status;
6959 }
6960
6961 /*
6962  * Decode SETCLIENTID response
6963  */
6964 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6965                                     struct xdr_stream *xdr,
6966                                     void *data)
6967 {
6968         struct nfs4_setclientid_res *res = data;
6969         struct compound_hdr hdr;
6970         int status;
6971
6972         status = decode_compound_hdr(xdr, &hdr);
6973         if (!status)
6974                 status = decode_setclientid(xdr, res);
6975         return status;
6976 }
6977
6978 /*
6979  * Decode SETCLIENTID_CONFIRM response
6980  */
6981 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6982                                             struct xdr_stream *xdr,
6983                                             void *data)
6984 {
6985         struct compound_hdr hdr;
6986         int status;
6987
6988         status = decode_compound_hdr(xdr, &hdr);
6989         if (!status)
6990                 status = decode_setclientid_confirm(xdr);
6991         return status;
6992 }
6993
6994 /*
6995  * Decode DELEGRETURN response
6996  */
6997 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6998                                     struct xdr_stream *xdr,
6999                                     void *data)
7000 {
7001         struct nfs4_delegreturnres *res = data;
7002         struct compound_hdr hdr;
7003         int status;
7004
7005         status = decode_compound_hdr(xdr, &hdr);
7006         if (status)
7007                 goto out;
7008         status = decode_sequence(xdr, &res->seq_res, rqstp);
7009         if (status)
7010                 goto out;
7011         status = decode_putfh(xdr);
7012         if (status != 0)
7013                 goto out;
7014         if (res->lr_res) {
7015                 status = decode_layoutreturn(xdr, res->lr_res);
7016                 res->lr_ret = status;
7017                 if (status)
7018                         goto out;
7019         }
7020         if (res->fattr) {
7021                 status = decode_getfattr(xdr, res->fattr, res->server);
7022                 if (status != 0)
7023                         goto out;
7024         }
7025         status = decode_delegreturn(xdr);
7026 out:
7027         return status;
7028 }
7029
7030 /*
7031  * Decode FS_LOCATIONS response
7032  */
7033 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7034                                      struct xdr_stream *xdr,
7035                                      void *data)
7036 {
7037         struct nfs4_fs_locations_res *res = data;
7038         struct compound_hdr hdr;
7039         int status;
7040
7041         status = decode_compound_hdr(xdr, &hdr);
7042         if (status)
7043                 goto out;
7044         status = decode_sequence(xdr, &res->seq_res, req);
7045         if (status)
7046                 goto out;
7047         status = decode_putfh(xdr);
7048         if (status)
7049                 goto out;
7050         if (res->migration) {
7051                 xdr_enter_page(xdr, PAGE_SIZE);
7052                 status = decode_getfattr_generic(xdr,
7053                                         &res->fs_locations->fattr,
7054                                          NULL, res->fs_locations,
7055                                          NULL, res->fs_locations->server);
7056                 if (status)
7057                         goto out;
7058                 if (res->renew)
7059                         status = decode_renew(xdr);
7060         } else {
7061                 status = decode_lookup(xdr);
7062                 if (status)
7063                         goto out;
7064                 xdr_enter_page(xdr, PAGE_SIZE);
7065                 status = decode_getfattr_generic(xdr,
7066                                         &res->fs_locations->fattr,
7067                                          NULL, res->fs_locations,
7068                                          NULL, res->fs_locations->server);
7069         }
7070 out:
7071         return status;
7072 }
7073
7074 /*
7075  * Decode SECINFO response
7076  */
7077 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7078                                 struct xdr_stream *xdr,
7079                                 void *data)
7080 {
7081         struct nfs4_secinfo_res *res = data;
7082         struct compound_hdr hdr;
7083         int status;
7084
7085         status = decode_compound_hdr(xdr, &hdr);
7086         if (status)
7087                 goto out;
7088         status = decode_sequence(xdr, &res->seq_res, rqstp);
7089         if (status)
7090                 goto out;
7091         status = decode_putfh(xdr);
7092         if (status)
7093                 goto out;
7094         status = decode_secinfo(xdr, res);
7095 out:
7096         return status;
7097 }
7098
7099 /*
7100  * Decode FSID_PRESENT response
7101  */
7102 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7103                                      struct xdr_stream *xdr,
7104                                      void *data)
7105 {
7106         struct nfs4_fsid_present_res *res = data;
7107         struct compound_hdr hdr;
7108         int status;
7109
7110         status = decode_compound_hdr(xdr, &hdr);
7111         if (status)
7112                 goto out;
7113         status = decode_sequence(xdr, &res->seq_res, rqstp);
7114         if (status)
7115                 goto out;
7116         status = decode_putfh(xdr);
7117         if (status)
7118                 goto out;
7119         status = decode_getfh(xdr, res->fh);
7120         if (status)
7121                 goto out;
7122         if (res->renew)
7123                 status = decode_renew(xdr);
7124 out:
7125         return status;
7126 }
7127
7128 #if defined(CONFIG_NFS_V4_1)
7129 /*
7130  * Decode BIND_CONN_TO_SESSION response
7131  */
7132 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7133                                         struct xdr_stream *xdr,
7134                                         void *res)
7135 {
7136         struct compound_hdr hdr;
7137         int status;
7138
7139         status = decode_compound_hdr(xdr, &hdr);
7140         if (!status)
7141                 status = decode_bind_conn_to_session(xdr, res);
7142         return status;
7143 }
7144
7145 /*
7146  * Decode EXCHANGE_ID response
7147  */
7148 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7149                                     struct xdr_stream *xdr,
7150                                     void *res)
7151 {
7152         struct compound_hdr hdr;
7153         int status;
7154
7155         status = decode_compound_hdr(xdr, &hdr);
7156         if (!status)
7157                 status = decode_exchange_id(xdr, res);
7158         return status;
7159 }
7160
7161 /*
7162  * Decode CREATE_SESSION response
7163  */
7164 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7165                                        struct xdr_stream *xdr,
7166                                        void *res)
7167 {
7168         struct compound_hdr hdr;
7169         int status;
7170
7171         status = decode_compound_hdr(xdr, &hdr);
7172         if (!status)
7173                 status = decode_create_session(xdr, res);
7174         return status;
7175 }
7176
7177 /*
7178  * Decode DESTROY_SESSION response
7179  */
7180 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7181                                         struct xdr_stream *xdr,
7182                                         void *res)
7183 {
7184         struct compound_hdr hdr;
7185         int status;
7186
7187         status = decode_compound_hdr(xdr, &hdr);
7188         if (!status)
7189                 status = decode_destroy_session(xdr, res);
7190         return status;
7191 }
7192
7193 /*
7194  * Decode DESTROY_CLIENTID response
7195  */
7196 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7197                                         struct xdr_stream *xdr,
7198                                         void *res)
7199 {
7200         struct compound_hdr hdr;
7201         int status;
7202
7203         status = decode_compound_hdr(xdr, &hdr);
7204         if (!status)
7205                 status = decode_destroy_clientid(xdr, res);
7206         return status;
7207 }
7208
7209 /*
7210  * Decode SEQUENCE response
7211  */
7212 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7213                                  struct xdr_stream *xdr,
7214                                  void *res)
7215 {
7216         struct compound_hdr hdr;
7217         int status;
7218
7219         status = decode_compound_hdr(xdr, &hdr);
7220         if (!status)
7221                 status = decode_sequence(xdr, res, rqstp);
7222         return status;
7223 }
7224
7225 /*
7226  * Decode GET_LEASE_TIME response
7227  */
7228 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7229                                        struct xdr_stream *xdr,
7230                                        void *data)
7231 {
7232         struct nfs4_get_lease_time_res *res = data;
7233         struct compound_hdr hdr;
7234         int status;
7235
7236         status = decode_compound_hdr(xdr, &hdr);
7237         if (!status)
7238                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7239         if (!status)
7240                 status = decode_putrootfh(xdr);
7241         if (!status)
7242                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7243         return status;
7244 }
7245
7246 /*
7247  * Decode RECLAIM_COMPLETE response
7248  */
7249 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7250                                          struct xdr_stream *xdr,
7251                                          void *data)
7252 {
7253         struct nfs41_reclaim_complete_res *res = data;
7254         struct compound_hdr hdr;
7255         int status;
7256
7257         status = decode_compound_hdr(xdr, &hdr);
7258         if (!status)
7259                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7260         if (!status)
7261                 status = decode_reclaim_complete(xdr, NULL);
7262         return status;
7263 }
7264
7265 /*
7266  * Decode GETDEVINFO response
7267  */
7268 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7269                                       struct xdr_stream *xdr,
7270                                       void *data)
7271 {
7272         struct nfs4_getdeviceinfo_res *res = data;
7273         struct compound_hdr hdr;
7274         int status;
7275
7276         status = decode_compound_hdr(xdr, &hdr);
7277         if (status != 0)
7278                 goto out;
7279         status = decode_sequence(xdr, &res->seq_res, rqstp);
7280         if (status != 0)
7281                 goto out;
7282         status = decode_getdeviceinfo(xdr, res);
7283 out:
7284         return status;
7285 }
7286
7287 /*
7288  * Decode LAYOUTGET response
7289  */
7290 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7291                                   struct xdr_stream *xdr,
7292                                   void *data)
7293 {
7294         struct nfs4_layoutget_res *res = data;
7295         struct compound_hdr hdr;
7296         int status;
7297
7298         status = decode_compound_hdr(xdr, &hdr);
7299         if (status)
7300                 goto out;
7301         status = decode_sequence(xdr, &res->seq_res, rqstp);
7302         if (status)
7303                 goto out;
7304         status = decode_putfh(xdr);
7305         if (status)
7306                 goto out;
7307         status = decode_layoutget(xdr, rqstp, res);
7308 out:
7309         return status;
7310 }
7311
7312 /*
7313  * Decode LAYOUTRETURN response
7314  */
7315 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7316                                      struct xdr_stream *xdr,
7317                                      void *data)
7318 {
7319         struct nfs4_layoutreturn_res *res = data;
7320         struct compound_hdr hdr;
7321         int status;
7322
7323         status = decode_compound_hdr(xdr, &hdr);
7324         if (status)
7325                 goto out;
7326         status = decode_sequence(xdr, &res->seq_res, rqstp);
7327         if (status)
7328                 goto out;
7329         status = decode_putfh(xdr);
7330         if (status)
7331                 goto out;
7332         status = decode_layoutreturn(xdr, res);
7333 out:
7334         return status;
7335 }
7336
7337 /*
7338  * Decode LAYOUTCOMMIT response
7339  */
7340 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7341                                      struct xdr_stream *xdr,
7342                                      void *data)
7343 {
7344         struct nfs4_layoutcommit_res *res = data;
7345         struct compound_hdr hdr;
7346         int status;
7347
7348         status = decode_compound_hdr(xdr, &hdr);
7349         if (status)
7350                 goto out;
7351         status = decode_sequence(xdr, &res->seq_res, rqstp);
7352         if (status)
7353                 goto out;
7354         status = decode_putfh(xdr);
7355         if (status)
7356                 goto out;
7357         status = decode_layoutcommit(xdr, rqstp, res);
7358         if (status)
7359                 goto out;
7360         decode_getfattr(xdr, res->fattr, res->server);
7361 out:
7362         return status;
7363 }
7364
7365 /*
7366  * Decode SECINFO_NO_NAME response
7367  */
7368 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7369                                         struct xdr_stream *xdr,
7370                                         void *data)
7371 {
7372         struct nfs4_secinfo_res *res = data;
7373         struct compound_hdr hdr;
7374         int status;
7375
7376         status = decode_compound_hdr(xdr, &hdr);
7377         if (status)
7378                 goto out;
7379         status = decode_sequence(xdr, &res->seq_res, rqstp);
7380         if (status)
7381                 goto out;
7382         status = decode_putrootfh(xdr);
7383         if (status)
7384                 goto out;
7385         status = decode_secinfo_no_name(xdr, res);
7386 out:
7387         return status;
7388 }
7389
7390 /*
7391  * Decode TEST_STATEID response
7392  */
7393 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7394                                      struct xdr_stream *xdr,
7395                                      void *data)
7396 {
7397         struct nfs41_test_stateid_res *res = data;
7398         struct compound_hdr hdr;
7399         int status;
7400
7401         status = decode_compound_hdr(xdr, &hdr);
7402         if (status)
7403                 goto out;
7404         status = decode_sequence(xdr, &res->seq_res, rqstp);
7405         if (status)
7406                 goto out;
7407         status = decode_test_stateid(xdr, res);
7408 out:
7409         return status;
7410 }
7411
7412 /*
7413  * Decode FREE_STATEID response
7414  */
7415 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7416                                      struct xdr_stream *xdr,
7417                                      void *data)
7418 {
7419         struct nfs41_free_stateid_res *res = data;
7420         struct compound_hdr hdr;
7421         int status;
7422
7423         status = decode_compound_hdr(xdr, &hdr);
7424         if (status)
7425                 goto out;
7426         status = decode_sequence(xdr, &res->seq_res, rqstp);
7427         if (status)
7428                 goto out;
7429         status = decode_free_stateid(xdr, res);
7430 out:
7431         return status;
7432 }
7433 #endif /* CONFIG_NFS_V4_1 */
7434
7435 /**
7436  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7437  *                      the local page cache.
7438  * @xdr: XDR stream where entry resides
7439  * @entry: buffer to fill in with entry data
7440  * @plus: boolean indicating whether this should be a readdirplus entry
7441  *
7442  * Returns zero if successful, otherwise a negative errno value is
7443  * returned.
7444  *
7445  * This function is not invoked during READDIR reply decoding, but
7446  * rather whenever an application invokes the getdents(2) system call
7447  * on a directory already in our cache.
7448  */
7449 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7450                        int plus)
7451 {
7452         unsigned int savep;
7453         uint32_t bitmap[3] = {0};
7454         uint32_t len;
7455         __be32 *p = xdr_inline_decode(xdr, 4);
7456         if (unlikely(!p))
7457                 goto out_overflow;
7458         if (*p == xdr_zero) {
7459                 p = xdr_inline_decode(xdr, 4);
7460                 if (unlikely(!p))
7461                         goto out_overflow;
7462                 if (*p == xdr_zero)
7463                         return -EAGAIN;
7464                 entry->eof = 1;
7465                 return -EBADCOOKIE;
7466         }
7467
7468         p = xdr_inline_decode(xdr, 12);
7469         if (unlikely(!p))
7470                 goto out_overflow;
7471         entry->prev_cookie = entry->cookie;
7472         p = xdr_decode_hyper(p, &entry->cookie);
7473         entry->len = be32_to_cpup(p);
7474
7475         p = xdr_inline_decode(xdr, entry->len);
7476         if (unlikely(!p))
7477                 goto out_overflow;
7478         entry->name = (const char *) p;
7479
7480         /*
7481          * In case the server doesn't return an inode number,
7482          * we fake one here.  (We don't use inode number 0,
7483          * since glibc seems to choke on it...)
7484          */
7485         entry->ino = 1;
7486         entry->fattr->valid = 0;
7487
7488         if (decode_attr_bitmap(xdr, bitmap) < 0)
7489                 goto out_overflow;
7490
7491         if (decode_attr_length(xdr, &len, &savep) < 0)
7492                 goto out_overflow;
7493
7494         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7495                         NULL, entry->label, entry->server) < 0)
7496                 goto out_overflow;
7497         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7498                 entry->ino = entry->fattr->mounted_on_fileid;
7499         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7500                 entry->ino = entry->fattr->fileid;
7501
7502         entry->d_type = DT_UNKNOWN;
7503         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7504                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7505
7506         return 0;
7507
7508 out_overflow:
7509         print_overflow_msg(__func__, xdr);
7510         return -EAGAIN;
7511 }
7512
7513 /*
7514  * We need to translate between nfs status return values and
7515  * the local errno values which may not be the same.
7516  */
7517 static struct {
7518         int stat;
7519         int errno;
7520 } nfs_errtbl[] = {
7521         { NFS4_OK,              0               },
7522         { NFS4ERR_PERM,         -EPERM          },
7523         { NFS4ERR_NOENT,        -ENOENT         },
7524         { NFS4ERR_IO,           -errno_NFSERR_IO},
7525         { NFS4ERR_NXIO,         -ENXIO          },
7526         { NFS4ERR_ACCESS,       -EACCES         },
7527         { NFS4ERR_EXIST,        -EEXIST         },
7528         { NFS4ERR_XDEV,         -EXDEV          },
7529         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7530         { NFS4ERR_ISDIR,        -EISDIR         },
7531         { NFS4ERR_INVAL,        -EINVAL         },
7532         { NFS4ERR_FBIG,         -EFBIG          },
7533         { NFS4ERR_NOSPC,        -ENOSPC         },
7534         { NFS4ERR_ROFS,         -EROFS          },
7535         { NFS4ERR_MLINK,        -EMLINK         },
7536         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7537         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7538         { NFS4ERR_DQUOT,        -EDQUOT         },
7539         { NFS4ERR_STALE,        -ESTALE         },
7540         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7541         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7542         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7543         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7544         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7545         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7546         { NFS4ERR_LOCKED,       -EAGAIN         },
7547         { NFS4ERR_SYMLINK,      -ELOOP          },
7548         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7549         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7550         { -1,                   -EIO            }
7551 };
7552
7553 /*
7554  * Convert an NFS error code to a local one.
7555  * This one is used jointly by NFSv2 and NFSv3.
7556  */
7557 static int
7558 nfs4_stat_to_errno(int stat)
7559 {
7560         int i;
7561         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7562                 if (nfs_errtbl[i].stat == stat)
7563                         return nfs_errtbl[i].errno;
7564         }
7565         if (stat <= 10000 || stat > 10100) {
7566                 /* The server is looney tunes. */
7567                 return -EREMOTEIO;
7568         }
7569         /* If we cannot translate the error, the recovery routines should
7570          * handle it.
7571          * Note: remaining NFSv4 error codes have values > 10000, so should
7572          * not conflict with native Linux error codes.
7573          */
7574         return -stat;
7575 }
7576
7577 #ifdef CONFIG_NFS_V4_2
7578 #include "nfs42xdr.c"
7579 #endif /* CONFIG_NFS_V4_2 */
7580
7581 #define PROC(proc, argtype, restype)                            \
7582 [NFSPROC4_CLNT_##proc] = {                                      \
7583         .p_proc   = NFSPROC4_COMPOUND,                          \
7584         .p_encode = nfs4_xdr_##argtype,                         \
7585         .p_decode = nfs4_xdr_##restype,                         \
7586         .p_arglen = NFS4_##argtype##_sz,                        \
7587         .p_replen = NFS4_##restype##_sz,                        \
7588         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7589         .p_name   = #proc,                                      \
7590 }
7591
7592 #define STUB(proc)              \
7593 [NFSPROC4_CLNT_##proc] = {      \
7594         .p_name = #proc,        \
7595 }
7596
7597 struct rpc_procinfo     nfs4_procedures[] = {
7598         PROC(READ,              enc_read,               dec_read),
7599         PROC(WRITE,             enc_write,              dec_write),
7600         PROC(COMMIT,            enc_commit,             dec_commit),
7601         PROC(OPEN,              enc_open,               dec_open),
7602         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7603         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7604         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7605         PROC(CLOSE,             enc_close,              dec_close),
7606         PROC(SETATTR,           enc_setattr,            dec_setattr),
7607         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7608         PROC(RENEW,             enc_renew,              dec_renew),
7609         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7610         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7611         PROC(LOCK,              enc_lock,               dec_lock),
7612         PROC(LOCKT,             enc_lockt,              dec_lockt),
7613         PROC(LOCKU,             enc_locku,              dec_locku),
7614         PROC(ACCESS,            enc_access,             dec_access),
7615         PROC(GETATTR,           enc_getattr,            dec_getattr),
7616         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7617         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7618         PROC(REMOVE,            enc_remove,             dec_remove),
7619         PROC(RENAME,            enc_rename,             dec_rename),
7620         PROC(LINK,              enc_link,               dec_link),
7621         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7622         PROC(CREATE,            enc_create,             dec_create),
7623         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7624         PROC(STATFS,            enc_statfs,             dec_statfs),
7625         PROC(READLINK,          enc_readlink,           dec_readlink),
7626         PROC(READDIR,           enc_readdir,            dec_readdir),
7627         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7628         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7629         PROC(GETACL,            enc_getacl,             dec_getacl),
7630         PROC(SETACL,            enc_setacl,             dec_setacl),
7631         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7632         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7633         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7634         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7635 #if defined(CONFIG_NFS_V4_1)
7636         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7637         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7638         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7639         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7640         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7641         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7642         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7643         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7644         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7645         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7646         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7647         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7648         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7649         STUB(GETDEVICELIST),
7650         PROC(BIND_CONN_TO_SESSION,
7651                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7652         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7653 #endif /* CONFIG_NFS_V4_1 */
7654 #ifdef CONFIG_NFS_V4_2
7655         PROC(SEEK,              enc_seek,               dec_seek),
7656         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7657         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7658         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7659         PROC(CLONE,             enc_clone,              dec_clone),
7660         PROC(COPY,              enc_copy,               dec_copy),
7661 #endif /* CONFIG_NFS_V4_2 */
7662 };
7663
7664 const struct rpc_version nfs_version4 = {
7665         .number                 = 4,
7666         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7667         .procs                  = nfs4_procedures
7668 };
7669
7670 /*
7671  * Local variables:
7672  *  c-basic-offset: 8
7673  * End:
7674  */