fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/fs_struct.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "internal.h"
  59 #include "nfs4idmap.h"
  60 #include "nfs4session.h"
  61 #include "pnfs.h"
  62 #include "netns.h"
  63
  64 #define NFSDBG_FACILITY         NFSDBG_XDR
  65
  66 /* Mapping from NFS error code to "errno" error code. */
  67 #define errno_NFSERR_IO         EIO
  68
  69 static int nfs4_stat_to_errno(int);
  70
  71 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  72 #ifdef DEBUG
  73 #define NFS4_MAXTAGLEN          20
  74 #else
  75 #define NFS4_MAXTAGLEN          0
  76 #endif
  77
  78 /* lock,open owner id:
  79  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  80  */
  81 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  82 #define lock_owner_id_maxsz     (1 + 1 + 4)
  83 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  84 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  86 #define op_encode_hdr_maxsz     (1)
  87 #define op_decode_hdr_maxsz     (2)
  88 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  90 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  92 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  93                                 (NFS4_FHSIZE >> 2))
  94 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  95 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  96 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  97 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  98 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  99                                 ((3+NFS4_FHSIZE) >> 2))
 100 #define nfs4_fattr_bitmap_maxsz 4
 101 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 102 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 103 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 104 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 107 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 108 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 109 #else
 110 #define nfs4_label_maxsz        0
 111 #endif
 112 /* We support only one layout type per file system */
 113 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 114 /* This is based on getfattr, which uses the most attributes: */
 115 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 116                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 117                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 118                                  decode_mdsthreshold_maxsz))
 119 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 120                                 nfs4_fattr_value_maxsz)
 121 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 122 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 123                                  1 + 2 + 1 + \
 124                                 nfs4_owner_maxsz + \
 125                                 nfs4_group_maxsz + \
 126                                 nfs4_label_maxsz + \
 127                                 4 + 4)
 128 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 129 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 130 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 131 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 132 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 133 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 134  * layout types will be returned.
 135  */
 136 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 137                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 138 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 139 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 140 #define encode_setclientid_maxsz \
 141                                 (op_encode_hdr_maxsz + \
 142                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 143                                 /* client name */ \
 144                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 145                                 1 /* sc_prog */ + \
 146                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 147                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 148                                 1) /* sc_cb_ident */
 149 #define decode_setclientid_maxsz \
 150                                 (op_decode_hdr_maxsz + \
 151                                 2 /* clientid */ + \
 152                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 153                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 154                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 155 #define encode_setclientid_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 158 #define decode_setclientid_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz)
 160 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 161 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 162 #define encode_share_access_maxsz \
 163                                 (2)
 164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 165 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 167 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 168                                 2 + encode_share_access_maxsz + 2 + \
 169                                 open_owner_id_maxsz + \
 170                                 encode_opentype_maxsz + \
 171                                 encode_claim_null_maxsz)
 172 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 174                                 decode_ace_maxsz)
 175 #define decode_change_info_maxsz        (5)
 176 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 177                                 decode_stateid_maxsz + \
 178                                 decode_change_info_maxsz + 1 + \
 179                                 nfs4_fattr_bitmap_maxsz + \
 180                                 decode_delegation_maxsz)
 181 #define encode_open_confirm_maxsz \
 182                                 (op_encode_hdr_maxsz + \
 183                                  encode_stateid_maxsz + 1)
 184 #define decode_open_confirm_maxsz \
 185                                 (op_decode_hdr_maxsz + \
 186                                  decode_stateid_maxsz)
 187 #define encode_open_downgrade_maxsz \
 188                                 (op_encode_hdr_maxsz + \
 189                                  encode_stateid_maxsz + 1 + \
 190                                  encode_share_access_maxsz)
 191 #define decode_open_downgrade_maxsz \
 192                                 (op_decode_hdr_maxsz + \
 193                                  decode_stateid_maxsz)
 194 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 195                                  1 + encode_stateid_maxsz)
 196 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 197                                  decode_stateid_maxsz)
 198 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 199                                  encode_stateid_maxsz + \
 200                                  encode_attrs_maxsz)
 201 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 202                                  nfs4_fattr_bitmap_maxsz)
 203 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 204                                  encode_stateid_maxsz + 3)
 205 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 206 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 207                                  2 + encode_verifier_maxsz + 5 + \
 208                                 nfs4_label_maxsz)
 209 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 210                                  decode_verifier_maxsz)
 211 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 212 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 213 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 214                                  encode_stateid_maxsz + 4)
 215 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 216                                  2 + decode_verifier_maxsz)
 217 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 218 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 219                                  decode_verifier_maxsz)
 220 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 221                                 nfs4_name_maxsz)
 222 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 223                                  decode_change_info_maxsz)
 224 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 225                                 2 * nfs4_name_maxsz)
 226 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 227                                  decode_change_info_maxsz + \
 228                                  decode_change_info_maxsz)
 229 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 230                                 nfs4_name_maxsz)
 231 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 232 #define encode_lockowner_maxsz  (7)
 233 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 234                                  7 + \
 235                                  1 + encode_stateid_maxsz + 1 + \
 236                                  encode_lockowner_maxsz)
 237 #define decode_lock_denied_maxsz \
 238                                 (8 + decode_lockowner_maxsz)
 239 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 240                                  decode_lock_denied_maxsz)
 241 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 242                                 encode_lockowner_maxsz)
 243 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 244                                  decode_lock_denied_maxsz)
 245 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 246                                  encode_stateid_maxsz + \
 247                                  4)
 248 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 249                                  decode_stateid_maxsz)
 250 #define encode_release_lockowner_maxsz \
 251                                 (op_encode_hdr_maxsz + \
 252                                  encode_lockowner_maxsz)
 253 #define decode_release_lockowner_maxsz \
 254                                 (op_decode_hdr_maxsz)
 255 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 256 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 257 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 258                                 1 + nfs4_name_maxsz + \
 259                                 1 + \
 260                                 nfs4_fattr_maxsz)
 261 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 262 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 263                                 1 + 2 + nfs4_name_maxsz + \
 264                                 encode_attrs_maxsz)
 265 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 266                                 decode_change_info_maxsz + \
 267                                 nfs4_fattr_bitmap_maxsz)
 268 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 269 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 270 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 271 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 272 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 273 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 274                                  nfs4_fattr_bitmap_maxsz + 1)
 275 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 276                                  encode_stateid_maxsz + 3)
 277 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 278 #define encode_fs_locations_maxsz \
 279                                 (encode_getattr_maxsz)
 280 #define decode_fs_locations_maxsz \
 281                                 (0)
 282 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 283 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 284
 285 #if defined(CONFIG_NFS_V4_1)
 286 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 287 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 288                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 289
 290 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 291                                 encode_verifier_maxsz + \
 292                                 1 /* co_ownerid.len */ + \
 293                                 /* eia_clientowner */ \
 294                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 295                                 1 /* flags */ + \
 296                                 1 /* spa_how */ + \
 297                                 /* max is SP4_MACH_CRED (for now) */ + \
 298                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 299                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 300                                 1 /* implementation id array of size 1 */ + \
 301                                 1 /* nii_domain */ + \
 302                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 303                                 1 /* nii_name */ + \
 304                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 305                                 3 /* nii_date */)
 306 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 307                                 2 /* eir_clientid */ + \
 308                                 1 /* eir_sequenceid */ + \
 309                                 1 /* eir_flags */ + \
 310                                 1 /* spr_how */ + \
 311                                   /* max is SP4_MACH_CRED (for now) */ + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 314                                 2 /* eir_server_owner.so_minor_id */ + \
 315                                 /* eir_server_owner.so_major_id<> */ \
 316                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 317                                 /* eir_server_scope<> */ \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 319                                 1 /* eir_server_impl_id array length */ + \
 320                                 1 /* nii_domain */ + \
 321                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 322                                 1 /* nii_name */ + \
 323                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 324                                 3 /* nii_date */)
 325 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 326 #define decode_channel_attrs_maxsz  (6 + \
 327                                      1 /* ca_rdma_ird.len */ + \
 328                                      1 /* ca_rdma_ird */)
 329 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 330                                      2 /* csa_clientid */ + \
 331                                      1 /* csa_sequence */ + \
 332                                      1 /* csa_flags */ + \
 333                                      encode_channel_attrs_maxsz + \
 334                                      encode_channel_attrs_maxsz + \
 335                                      1 /* csa_cb_program */ + \
 336                                      1 /* csa_sec_parms.len (1) */ + \
 337                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 338                                      1 /* stamp */ + \
 339                                      1 /* machinename.len */ + \
 340                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 341                                      1 /* uid */ + \
 342                                      1 /* gid */ + \
 343                                      1 /* gids.len (0) */)
 344 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 345                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 346                                      1 /* csr_sequence */ + \
 347                                      1 /* csr_flags */ + \
 348                                      decode_channel_attrs_maxsz + \
 349                                      decode_channel_attrs_maxsz)
 350 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 351                                      /* bctsa_sessid */ \
 352                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 353                                      1 /* bctsa_dir */ + \
 354                                      1 /* bctsa_use_conn_in_rdma_mode */)
 355 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 356                                      /* bctsr_sessid */ \
 357                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 358                                      1 /* bctsr_dir */ + \
 359                                      1 /* bctsr_use_conn_in_rdma_mode */)
 360 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 361 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 362 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 363 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 364 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 365                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 366 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 367                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 368 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 369 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 370 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 371                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 372                                 1 /* layout type */ + \
 373                                 1 /* maxcount */ + \
 374                                 1 /* bitmap size */ + \
 375                                 1 /* notification bitmap length */ + \
 376                                 1 /* notification bitmap, word 0 */)
 377 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 378                                 1 /* layout type */ + \
 379                                 1 /* opaque devaddr4 length */ + \
 380                                   /* devaddr4 payload is read into page */ \
 381                                 1 /* notification bitmap length */ + \
 382                                 1 /* notification bitmap, word 0 */)
 383 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 384                                 encode_stateid_maxsz)
 385 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 386                                 decode_stateid_maxsz + \
 387                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 388 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 389                                 2 /* offset */ + \
 390                                 2 /* length */ + \
 391                                 1 /* reclaim */ + \
 392                                 encode_stateid_maxsz + \
 393                                 1 /* new offset (true) */ + \
 394                                 2 /* last byte written */ + \
 395                                 1 /* nt_timechanged (false) */ + \
 396                                 1 /* layoutupdate4 layout type */ + \
 397                                 1 /* layoutupdate4 opaqueue len */)
 398                                   /* the actual content of layoutupdate4 should
 399                                      be allocated by drivers and spliced in
 400                                      using xdr_write_pages */
 401 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 402 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 403                                 encode_stateid_maxsz + \
 404                                 1 + \
 405                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 406 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 407                                 1 + decode_stateid_maxsz)
 408 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 409 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 410 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 411                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 412 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 413 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 414                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 415 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 416 #else /* CONFIG_NFS_V4_1 */
 417 #define encode_sequence_maxsz   0
 418 #define decode_sequence_maxsz   0
 419 #define encode_layoutreturn_maxsz 0
 420 #define decode_layoutreturn_maxsz 0
 421 #endif /* CONFIG_NFS_V4_1 */
 422
 423 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 424 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 425 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 426                                 encode_sequence_maxsz + \
 427                                 encode_putfh_maxsz + \
 428                                 encode_read_maxsz)
 429 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 430                                 decode_sequence_maxsz + \
 431                                 decode_putfh_maxsz + \
 432                                 decode_read_maxsz)
 433 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 434                                 encode_sequence_maxsz + \
 435                                 encode_putfh_maxsz + \
 436                                 encode_readlink_maxsz)
 437 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 438                                 decode_sequence_maxsz + \
 439                                 decode_putfh_maxsz + \
 440                                 decode_readlink_maxsz)
 441 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_readdir_maxsz)
 445 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 446                                 decode_sequence_maxsz + \
 447                                 decode_putfh_maxsz + \
 448                                 decode_readdir_maxsz)
 449 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 450                                 encode_sequence_maxsz + \
 451                                 encode_putfh_maxsz + \
 452                                 encode_write_maxsz + \
 453                                 encode_getattr_maxsz)
 454 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 455                                 decode_sequence_maxsz + \
 456                                 decode_putfh_maxsz + \
 457                                 decode_write_maxsz + \
 458                                 decode_getattr_maxsz)
 459 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 460                                 encode_sequence_maxsz + \
 461                                 encode_putfh_maxsz + \
 462                                 encode_commit_maxsz)
 463 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 464                                 decode_sequence_maxsz + \
 465                                 decode_putfh_maxsz + \
 466                                 decode_commit_maxsz)
 467 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 468                                 encode_sequence_maxsz + \
 469                                 encode_putfh_maxsz + \
 470                                 encode_open_maxsz + \
 471                                 encode_access_maxsz + \
 472                                 encode_getfh_maxsz + \
 473                                 encode_getattr_maxsz)
 474 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 475                                 decode_sequence_maxsz + \
 476                                 decode_putfh_maxsz + \
 477                                 decode_open_maxsz + \
 478                                 decode_access_maxsz + \
 479                                 decode_getfh_maxsz + \
 480                                 decode_getattr_maxsz)
 481 #define NFS4_enc_open_confirm_sz \
 482                                 (compound_encode_hdr_maxsz + \
 483                                  encode_putfh_maxsz + \
 484                                  encode_open_confirm_maxsz)
 485 #define NFS4_dec_open_confirm_sz \
 486                                 (compound_decode_hdr_maxsz + \
 487                                  decode_putfh_maxsz + \
 488                                  decode_open_confirm_maxsz)
 489 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 490                                         encode_sequence_maxsz + \
 491                                         encode_putfh_maxsz + \
 492                                         encode_open_maxsz + \
 493                                         encode_access_maxsz + \
 494                                         encode_getattr_maxsz)
 495 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 496                                         decode_sequence_maxsz + \
 497                                         decode_putfh_maxsz + \
 498                                         decode_open_maxsz + \
 499                                         decode_access_maxsz + \
 500                                         decode_getattr_maxsz)
 501 #define NFS4_enc_open_downgrade_sz \
 502                                 (compound_encode_hdr_maxsz + \
 503                                  encode_sequence_maxsz + \
 504                                  encode_putfh_maxsz + \
 505                                  encode_layoutreturn_maxsz + \
 506                                  encode_open_downgrade_maxsz)
 507 #define NFS4_dec_open_downgrade_sz \
 508                                 (compound_decode_hdr_maxsz + \
 509                                  decode_sequence_maxsz + \
 510                                  decode_putfh_maxsz + \
 511                                  decode_layoutreturn_maxsz + \
 512                                  decode_open_downgrade_maxsz)
 513 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 514                                  encode_sequence_maxsz + \
 515                                  encode_putfh_maxsz + \
 516                                  encode_layoutreturn_maxsz + \
 517                                  encode_close_maxsz + \
 518                                  encode_getattr_maxsz)
 519 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 520                                  decode_sequence_maxsz + \
 521                                  decode_putfh_maxsz + \
 522                                  decode_layoutreturn_maxsz + \
 523                                  decode_close_maxsz + \
 524                                  decode_getattr_maxsz)
 525 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 526                                  encode_sequence_maxsz + \
 527                                  encode_putfh_maxsz + \
 528                                  encode_setattr_maxsz + \
 529                                  encode_getattr_maxsz)
 530 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 531                                  decode_sequence_maxsz + \
 532                                  decode_putfh_maxsz + \
 533                                  decode_setattr_maxsz + \
 534                                  decode_getattr_maxsz)
 535 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 536                                 encode_sequence_maxsz + \
 537                                 encode_putfh_maxsz + \
 538                                 encode_fsinfo_maxsz)
 539 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 540                                 decode_sequence_maxsz + \
 541                                 decode_putfh_maxsz + \
 542                                 decode_fsinfo_maxsz)
 543 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 544                                 encode_renew_maxsz)
 545 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 546                                 decode_renew_maxsz)
 547 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 548                                 encode_setclientid_maxsz)
 549 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 550                                 decode_setclientid_maxsz)
 551 #define NFS4_enc_setclientid_confirm_sz \
 552                                 (compound_encode_hdr_maxsz + \
 553                                 encode_setclientid_confirm_maxsz)
 554 #define NFS4_dec_setclientid_confirm_sz \
 555                                 (compound_decode_hdr_maxsz + \
 556                                 decode_setclientid_confirm_maxsz)
 557 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_lock_maxsz)
 561 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_lock_maxsz)
 565 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 566                                 encode_sequence_maxsz + \
 567                                 encode_putfh_maxsz + \
 568                                 encode_lockt_maxsz)
 569 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 570                                  decode_sequence_maxsz + \
 571                                  decode_putfh_maxsz + \
 572                                  decode_lockt_maxsz)
 573 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 574                                 encode_sequence_maxsz + \
 575                                 encode_putfh_maxsz + \
 576                                 encode_locku_maxsz)
 577 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 578                                 decode_sequence_maxsz + \
 579                                 decode_putfh_maxsz + \
 580                                 decode_locku_maxsz)
 581 #define NFS4_enc_release_lockowner_sz \
 582                                 (compound_encode_hdr_maxsz + \
 583                                  encode_lockowner_maxsz)
 584 #define NFS4_dec_release_lockowner_sz \
 585                                 (compound_decode_hdr_maxsz + \
 586                                  decode_lockowner_maxsz)
 587 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 588                                 encode_sequence_maxsz + \
 589                                 encode_putfh_maxsz + \
 590                                 encode_access_maxsz + \
 591                                 encode_getattr_maxsz)
 592 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_access_maxsz + \
 596                                 decode_getattr_maxsz)
 597 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 598                                 encode_sequence_maxsz + \
 599                                 encode_putfh_maxsz + \
 600                                 encode_getattr_maxsz + \
 601                                 encode_renew_maxsz)
 602 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 603                                 decode_sequence_maxsz + \
 604                                 decode_putfh_maxsz + \
 605                                 decode_getattr_maxsz + \
 606                                 decode_renew_maxsz)
 607 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_lookup_maxsz + \
 611                                 encode_getattr_maxsz + \
 612                                 encode_getfh_maxsz)
 613 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 614                                 decode_sequence_maxsz + \
 615                                 decode_putfh_maxsz + \
 616                                 decode_lookup_maxsz + \
 617                                 decode_getattr_maxsz + \
 618                                 decode_getfh_maxsz)
 619 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 620                                 encode_sequence_maxsz + \
 621                                 encode_putrootfh_maxsz + \
 622                                 encode_getattr_maxsz + \
 623                                 encode_getfh_maxsz)
 624 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putrootfh_maxsz + \
 627                                 decode_getattr_maxsz + \
 628                                 decode_getfh_maxsz)
 629 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_remove_maxsz)
 633 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_remove_maxsz)
 637 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 638                                 encode_sequence_maxsz + \
 639                                 encode_putfh_maxsz + \
 640                                 encode_savefh_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_rename_maxsz)
 643 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 644                                 decode_sequence_maxsz + \
 645                                 decode_putfh_maxsz + \
 646                                 decode_savefh_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_rename_maxsz)
 649 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 650                                 encode_sequence_maxsz + \
 651                                 encode_putfh_maxsz + \
 652                                 encode_savefh_maxsz + \
 653                                 encode_putfh_maxsz + \
 654                                 encode_link_maxsz + \
 655                                 encode_restorefh_maxsz + \
 656                                 encode_getattr_maxsz)
 657 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 658                                 decode_sequence_maxsz + \
 659                                 decode_putfh_maxsz + \
 660                                 decode_savefh_maxsz + \
 661                                 decode_putfh_maxsz + \
 662                                 decode_link_maxsz + \
 663                                 decode_restorefh_maxsz + \
 664                                 decode_getattr_maxsz)
 665 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 666                                 encode_sequence_maxsz + \
 667                                 encode_putfh_maxsz + \
 668                                 encode_symlink_maxsz + \
 669                                 encode_getattr_maxsz + \
 670                                 encode_getfh_maxsz)
 671 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 672                                 decode_sequence_maxsz + \
 673                                 decode_putfh_maxsz + \
 674                                 decode_symlink_maxsz + \
 675                                 decode_getattr_maxsz + \
 676                                 decode_getfh_maxsz)
 677 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 678                                 encode_sequence_maxsz + \
 679                                 encode_putfh_maxsz + \
 680                                 encode_create_maxsz + \
 681                                 encode_getfh_maxsz + \
 682                                 encode_getattr_maxsz)
 683 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 684                                 decode_sequence_maxsz + \
 685                                 decode_putfh_maxsz + \
 686                                 decode_create_maxsz + \
 687                                 decode_getfh_maxsz + \
 688                                 decode_getattr_maxsz)
 689 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 690                                 encode_sequence_maxsz + \
 691                                 encode_putfh_maxsz + \
 692                                 encode_getattr_maxsz)
 693 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 694                                 decode_sequence_maxsz + \
 695                                 decode_putfh_maxsz + \
 696                                 decode_getattr_maxsz)
 697 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_statfs_maxsz)
 701 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_statfs_maxsz)
 705 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 706                                 encode_sequence_maxsz + \
 707                                 encode_putfh_maxsz + \
 708                                 encode_getattr_maxsz)
 709 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 710                                 decode_sequence_maxsz + \
 711                                 decode_putfh_maxsz + \
 712                                 decode_getattr_maxsz)
 713 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 714                                 encode_sequence_maxsz + \
 715                                 encode_putfh_maxsz + \
 716                                 encode_layoutreturn_maxsz + \
 717                                 encode_delegreturn_maxsz + \
 718                                 encode_getattr_maxsz)
 719 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 720                                 decode_sequence_maxsz + \
 721                                 decode_putfh_maxsz + \
 722                                 decode_layoutreturn_maxsz + \
 723                                 decode_delegreturn_maxsz + \
 724                                 decode_getattr_maxsz)
 725 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 726                                 encode_sequence_maxsz + \
 727                                 encode_putfh_maxsz + \
 728                                 encode_getacl_maxsz)
 729 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 730                                 decode_sequence_maxsz + \
 731                                 decode_putfh_maxsz + \
 732                                 decode_getacl_maxsz)
 733 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 734                                 encode_sequence_maxsz + \
 735                                 encode_putfh_maxsz + \
 736                                 encode_setacl_maxsz)
 737 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 738                                 decode_sequence_maxsz + \
 739                                 decode_putfh_maxsz + \
 740                                 decode_setacl_maxsz)
 741 #define NFS4_enc_fs_locations_sz \
 742                                 (compound_encode_hdr_maxsz + \
 743                                  encode_sequence_maxsz + \
 744                                  encode_putfh_maxsz + \
 745                                  encode_lookup_maxsz + \
 746                                  encode_fs_locations_maxsz + \
 747                                  encode_renew_maxsz)
 748 #define NFS4_dec_fs_locations_sz \
 749                                 (compound_decode_hdr_maxsz + \
 750                                  decode_sequence_maxsz + \
 751                                  decode_putfh_maxsz + \
 752                                  decode_lookup_maxsz + \
 753                                  decode_fs_locations_maxsz + \
 754                                  decode_renew_maxsz)
 755 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 756                                 encode_sequence_maxsz + \
 757                                 encode_putfh_maxsz + \
 758                                 encode_secinfo_maxsz)
 759 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 760                                 decode_sequence_maxsz + \
 761                                 decode_putfh_maxsz + \
 762                                 decode_secinfo_maxsz)
 763 #define NFS4_enc_fsid_present_sz \
 764                                 (compound_encode_hdr_maxsz + \
 765                                  encode_sequence_maxsz + \
 766                                  encode_putfh_maxsz + \
 767                                  encode_getfh_maxsz + \
 768                                  encode_renew_maxsz)
 769 #define NFS4_dec_fsid_present_sz \
 770                                 (compound_decode_hdr_maxsz + \
 771                                  decode_sequence_maxsz + \
 772                                  decode_putfh_maxsz + \
 773                                  decode_getfh_maxsz + \
 774                                  decode_renew_maxsz)
 775 #if defined(CONFIG_NFS_V4_1)
 776 #define NFS4_enc_bind_conn_to_session_sz \
 777                                 (compound_encode_hdr_maxsz + \
 778                                  encode_bind_conn_to_session_maxsz)
 779 #define NFS4_dec_bind_conn_to_session_sz \
 780                                 (compound_decode_hdr_maxsz + \
 781                                  decode_bind_conn_to_session_maxsz)
 782 #define NFS4_enc_exchange_id_sz \
 783                                 (compound_encode_hdr_maxsz + \
 784                                  encode_exchange_id_maxsz)
 785 #define NFS4_dec_exchange_id_sz \
 786                                 (compound_decode_hdr_maxsz + \
 787                                  decode_exchange_id_maxsz)
 788 #define NFS4_enc_create_session_sz \
 789                                 (compound_encode_hdr_maxsz + \
 790                                  encode_create_session_maxsz)
 791 #define NFS4_dec_create_session_sz \
 792                                 (compound_decode_hdr_maxsz + \
 793                                  decode_create_session_maxsz)
 794 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 795                                          encode_destroy_session_maxsz)
 796 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 797                                          decode_destroy_session_maxsz)
 798 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 799                                          encode_destroy_clientid_maxsz)
 800 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 801                                          decode_destroy_clientid_maxsz)
 802 #define NFS4_enc_sequence_sz \
 803                                 (compound_decode_hdr_maxsz + \
 804                                  encode_sequence_maxsz)
 805 #define NFS4_dec_sequence_sz \
 806                                 (compound_decode_hdr_maxsz + \
 807                                  decode_sequence_maxsz)
 808 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 809                                          encode_sequence_maxsz + \
 810                                          encode_putrootfh_maxsz + \
 811                                          encode_fsinfo_maxsz)
 812 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 813                                          decode_sequence_maxsz + \
 814                                          decode_putrootfh_maxsz + \
 815                                          decode_fsinfo_maxsz)
 816 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 817                                          encode_sequence_maxsz + \
 818                                          encode_reclaim_complete_maxsz)
 819 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 820                                          decode_sequence_maxsz + \
 821                                          decode_reclaim_complete_maxsz)
 822 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 823                                 encode_sequence_maxsz +\
 824                                 encode_getdeviceinfo_maxsz)
 825 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 826                                 decode_sequence_maxsz + \
 827                                 decode_getdeviceinfo_maxsz)
 828 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 829                                 encode_sequence_maxsz + \
 830                                 encode_putfh_maxsz +        \
 831                                 encode_layoutget_maxsz)
 832 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 833                                 decode_sequence_maxsz + \
 834                                 decode_putfh_maxsz +        \
 835                                 decode_layoutget_maxsz)
 836 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 837                                 encode_sequence_maxsz +\
 838                                 encode_putfh_maxsz + \
 839                                 encode_layoutcommit_maxsz + \
 840                                 encode_getattr_maxsz)
 841 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 842                                 decode_sequence_maxsz + \
 843                                 decode_putfh_maxsz + \
 844                                 decode_layoutcommit_maxsz + \
 845                                 decode_getattr_maxsz)
 846 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 847                                 encode_sequence_maxsz + \
 848                                 encode_putfh_maxsz + \
 849                                 encode_layoutreturn_maxsz)
 850 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 851                                 decode_sequence_maxsz + \
 852                                 decode_putfh_maxsz + \
 853                                 decode_layoutreturn_maxsz)
 854 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 855                                         encode_sequence_maxsz + \
 856                                         encode_putrootfh_maxsz +\
 857                                         encode_secinfo_no_name_maxsz)
 858 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 859                                         decode_sequence_maxsz + \
 860                                         decode_putrootfh_maxsz + \
 861                                         decode_secinfo_no_name_maxsz)
 862 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 863                                          encode_sequence_maxsz + \
 864                                          encode_test_stateid_maxsz)
 865 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 866                                          decode_sequence_maxsz + \
 867                                          decode_test_stateid_maxsz)
 868 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 869                                          encode_sequence_maxsz + \
 870                                          encode_free_stateid_maxsz)
 871 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 872                                          decode_sequence_maxsz + \
 873                                          decode_free_stateid_maxsz)
 874
 875 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 876                                       compound_encode_hdr_maxsz +
 877                                       encode_sequence_maxsz +
 878                                       encode_putfh_maxsz +
 879                                       encode_getattr_maxsz) *
 880                                      XDR_UNIT);
 881
 882 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 883                                      compound_decode_hdr_maxsz +
 884                                      decode_sequence_maxsz +
 885                                      decode_putfh_maxsz) *
 886                                     XDR_UNIT);
 887
 888 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 889                                            compound_decode_hdr_maxsz +
 890                                            decode_sequence_maxsz) *
 891                                           XDR_UNIT);
 892 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 893 #endif /* CONFIG_NFS_V4_1 */
 894
 895 static const umode_t nfs_type2fmt[] = {
 896         [NF4BAD] = 0,
 897         [NF4REG] = S_IFREG,
 898         [NF4DIR] = S_IFDIR,
 899         [NF4BLK] = S_IFBLK,
 900         [NF4CHR] = S_IFCHR,
 901         [NF4LNK] = S_IFLNK,
 902         [NF4SOCK] = S_IFSOCK,
 903         [NF4FIFO] = S_IFIFO,
 904         [NF4ATTRDIR] = 0,
 905         [NF4NAMEDATTR] = 0,
 906 };
 907
 908 struct compound_hdr {
 909         int32_t         status;
 910         uint32_t        nops;
 911         __be32 *        nops_p;
 912         uint32_t        taglen;
 913         char *          tag;
 914         uint32_t        replen;         /* expected reply words */
 915         u32             minorversion;
 916 };
 917
 918 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 919 {
 920         __be32 *p = xdr_reserve_space(xdr, nbytes);
 921         BUG_ON(!p);
 922         return p;
 923 }
 924
 925 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 926 {
 927         __be32 *p;
 928
 929         p = xdr_reserve_space(xdr, len);
 930         xdr_encode_opaque_fixed(p, buf, len);
 931 }
 932
 933 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 934 {
 935         __be32 *p;
 936
 937         p = reserve_space(xdr, 4 + len);
 938         xdr_encode_opaque(p, str, len);
 939 }
 940
 941 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 942 {
 943         __be32 *p;
 944
 945         p = reserve_space(xdr, 4);
 946         *p = cpu_to_be32(n);
 947 }
 948
 949 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 950 {
 951         __be32 *p;
 952
 953         p = reserve_space(xdr, 8);
 954         xdr_encode_hyper(p, n);
 955 }
 956
 957 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 958                 const struct nfs_seqid *seqid)
 959 {
 960         if (seqid != NULL)
 961                 encode_uint32(xdr, seqid->sequence->counter);
 962         else
 963                 encode_uint32(xdr, 0);
 964 }
 965
 966 static void encode_compound_hdr(struct xdr_stream *xdr,
 967                                 struct rpc_rqst *req,
 968                                 struct compound_hdr *hdr)
 969 {
 970         __be32 *p;
 971         struct rpc_auth *auth = req->rq_cred->cr_auth;
 972
 973         /* initialize running count of expected bytes in reply.
 974          * NOTE: the replied tag SHOULD be the same is the one sent,
 975          * but this is not required as a MUST for the server to do so. */
 976         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 977
 978         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 979         encode_string(xdr, hdr->taglen, hdr->tag);
 980         p = reserve_space(xdr, 8);
 981         *p++ = cpu_to_be32(hdr->minorversion);
 982         hdr->nops_p = p;
 983         *p = cpu_to_be32(hdr->nops);
 984 }
 985
 986 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 987                 uint32_t replen,
 988                 struct compound_hdr *hdr)
 989 {
 990         encode_uint32(xdr, op);
 991         hdr->nops++;
 992         hdr->replen += replen;
 993 }
 994
 995 static void encode_nops(struct compound_hdr *hdr)
 996 {
 997         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 998         *hdr->nops_p = htonl(hdr->nops);
 999 }
1000
1001 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1002 {
1003         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1004 }
1005
1006 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1007 {
1008         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1009 }
1010
1011 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1012                                 const struct nfs4_label *label,
1013                                 const struct nfs_server *server,
1014                                 bool excl_check, const umode_t *umask)
1015 {
1016         char owner_name[IDMAP_NAMESZ];
1017         char owner_group[IDMAP_NAMESZ];
1018         int owner_namelen = 0;
1019         int owner_grouplen = 0;
1020         __be32 *p;
1021         unsigned i;
1022         uint32_t len = 0;
1023         uint32_t bmval_len;
1024         uint32_t bmval[3] = { 0 };
1025
1026         /*
1027          * We reserve enough space to write the entire attribute buffer at once.
1028          */
1029         if (iap->ia_valid & ATTR_SIZE) {
1030                 bmval[0] |= FATTR4_WORD0_SIZE;
1031                 len += 8;
1032         }
1033         if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
1034                 umask = NULL;
1035         if (iap->ia_valid & ATTR_MODE) {
1036                 if (umask) {
1037                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1038                         len += 8;
1039                 } else {
1040                         bmval[1] |= FATTR4_WORD1_MODE;
1041                         len += 4;
1042                 }
1043         }
1044         if (iap->ia_valid & ATTR_UID) {
1045                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1046                 if (owner_namelen < 0) {
1047                         dprintk("nfs: couldn't resolve uid %d to string\n",
1048                                         from_kuid(&init_user_ns, iap->ia_uid));
1049                         /* XXX */
1050                         strcpy(owner_name, "nobody");
1051                         owner_namelen = sizeof("nobody") - 1;
1052                         /* goto out; */
1053                 }
1054                 bmval[1] |= FATTR4_WORD1_OWNER;
1055                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1056         }
1057         if (iap->ia_valid & ATTR_GID) {
1058                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1059                 if (owner_grouplen < 0) {
1060                         dprintk("nfs: couldn't resolve gid %d to string\n",
1061                                         from_kgid(&init_user_ns, iap->ia_gid));
1062                         strcpy(owner_group, "nobody");
1063                         owner_grouplen = sizeof("nobody") - 1;
1064                         /* goto out; */
1065                 }
1066                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1067                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1068         }
1069         if (iap->ia_valid & ATTR_ATIME_SET) {
1070                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1071                 len += 16;
1072         } else if (iap->ia_valid & ATTR_ATIME) {
1073                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1074                 len += 4;
1075         }
1076         if (iap->ia_valid & ATTR_MTIME_SET) {
1077                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1078                 len += 16;
1079         } else if (iap->ia_valid & ATTR_MTIME) {
1080                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1081                 len += 4;
1082         }
1083
1084         if (excl_check) {
1085                 const u32 *excl_bmval = server->exclcreat_bitmask;
1086                 bmval[0] &= excl_bmval[0];
1087                 bmval[1] &= excl_bmval[1];
1088                 bmval[2] &= excl_bmval[2];
1089
1090                 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1091                         label = NULL;
1092         }
1093
1094         if (label) {
1095                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1096                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1097         }
1098
1099         if (bmval[2] != 0)
1100                 bmval_len = 3;
1101         else if (bmval[1] != 0)
1102                 bmval_len = 2;
1103         else
1104                 bmval_len = 1;
1105
1106         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1107
1108         *p++ = cpu_to_be32(bmval_len);
1109         for (i = 0; i < bmval_len; i++)
1110                 *p++ = cpu_to_be32(bmval[i]);
1111         *p++ = cpu_to_be32(len);
1112
1113         if (bmval[0] & FATTR4_WORD0_SIZE)
1114                 p = xdr_encode_hyper(p, iap->ia_size);
1115         if (bmval[1] & FATTR4_WORD1_MODE)
1116                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1117         if (bmval[1] & FATTR4_WORD1_OWNER)
1118                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1119         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1120                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1121         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1122                 if (iap->ia_valid & ATTR_ATIME_SET) {
1123                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1124                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1125                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1126                 } else
1127                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1128         }
1129         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1130                 if (iap->ia_valid & ATTR_MTIME_SET) {
1131                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1132                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1133                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1134                 } else
1135                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1136         }
1137         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1138                 *p++ = cpu_to_be32(label->lfs);
1139                 *p++ = cpu_to_be32(label->pi);
1140                 *p++ = cpu_to_be32(label->len);
1141                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1142         }
1143         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1144                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1145                 *p++ = cpu_to_be32(*umask);
1146         }
1147
1148 /* out: */
1149 }
1150
1151 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1152 {
1153         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1154         encode_uint32(xdr, access);
1155 }
1156
1157 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1158 {
1159         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1160         encode_nfs4_seqid(xdr, arg->seqid);
1161         encode_nfs4_stateid(xdr, &arg->stateid);
1162 }
1163
1164 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1165 {
1166         __be32 *p;
1167
1168         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1169         p = reserve_space(xdr, 12);
1170         p = xdr_encode_hyper(p, args->offset);
1171         *p = cpu_to_be32(args->count);
1172 }
1173
1174 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1175 {
1176         __be32 *p;
1177
1178         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1179         encode_uint32(xdr, create->ftype);
1180
1181         switch (create->ftype) {
1182         case NF4LNK:
1183                 p = reserve_space(xdr, 4);
1184                 *p = cpu_to_be32(create->u.symlink.len);
1185                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1186                                 create->u.symlink.len);
1187                 xdr->buf->flags |= XDRBUF_WRITE;
1188                 break;
1189
1190         case NF4BLK: case NF4CHR:
1191                 p = reserve_space(xdr, 8);
1192                 *p++ = cpu_to_be32(create->u.device.specdata1);
1193                 *p = cpu_to_be32(create->u.device.specdata2);
1194                 break;
1195
1196         default:
1197                 break;
1198         }
1199
1200         encode_string(xdr, create->name->len, create->name->name);
1201         encode_attrs(xdr, create->attrs, create->label, create->server, false,
1202                      &create->umask);
1203 }
1204
1205 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1206 {
1207         __be32 *p;
1208
1209         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1210         p = reserve_space(xdr, 8);
1211         *p++ = cpu_to_be32(1);
1212         *p = cpu_to_be32(bitmap);
1213 }
1214
1215 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1216 {
1217         __be32 *p;
1218
1219         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1220         p = reserve_space(xdr, 12);
1221         *p++ = cpu_to_be32(2);
1222         *p++ = cpu_to_be32(bm0);
1223         *p = cpu_to_be32(bm1);
1224 }
1225
1226 static void
1227 encode_getattr_three(struct xdr_stream *xdr,
1228                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1229                      struct compound_hdr *hdr)
1230 {
1231         __be32 *p;
1232
1233         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234         if (bm2) {
1235                 p = reserve_space(xdr, 16);
1236                 *p++ = cpu_to_be32(3);
1237                 *p++ = cpu_to_be32(bm0);
1238                 *p++ = cpu_to_be32(bm1);
1239                 *p = cpu_to_be32(bm2);
1240         } else if (bm1) {
1241                 p = reserve_space(xdr, 12);
1242                 *p++ = cpu_to_be32(2);
1243                 *p++ = cpu_to_be32(bm0);
1244                 *p = cpu_to_be32(bm1);
1245         } else {
1246                 p = reserve_space(xdr, 8);
1247                 *p++ = cpu_to_be32(1);
1248                 *p = cpu_to_be32(bm0);
1249         }
1250 }
1251
1252 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1253 {
1254         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1255                            bitmask[1] & nfs4_fattr_bitmap[1],
1256                            bitmask[2] & nfs4_fattr_bitmap[2],
1257                            hdr);
1258 }
1259
1260 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1261                                  const u32 *open_bitmap,
1262                                  struct compound_hdr *hdr)
1263 {
1264         encode_getattr_three(xdr,
1265                              bitmask[0] & open_bitmap[0],
1266                              bitmask[1] & open_bitmap[1],
1267                              bitmask[2] & open_bitmap[2],
1268                              hdr);
1269 }
1270
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273         encode_getattr_three(xdr,
1274                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1275                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1276                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1277                              hdr);
1278 }
1279
1280 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281 {
1282         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1283                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1284 }
1285
1286 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287 {
1288         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289 }
1290
1291 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292 {
1293         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294         encode_string(xdr, name->len, name->name);
1295 }
1296
1297 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298 {
1299         if (fl->fl_type == F_RDLCK)
1300                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1301         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302 }
1303
1304 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305 {
1306         if (fl->fl_end == OFFSET_MAX)
1307                 return ~(uint64_t)0;
1308         return fl->fl_end - fl->fl_start + 1;
1309 }
1310
1311 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312 {
1313         __be32 *p;
1314
1315         p = reserve_space(xdr, 32);
1316         p = xdr_encode_hyper(p, lowner->clientid);
1317         *p++ = cpu_to_be32(20);
1318         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319         *p++ = cpu_to_be32(lowner->s_dev);
1320         xdr_encode_hyper(p, lowner->id);
1321 }
1322
1323 /*
1324  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326  */
1327 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328 {
1329         __be32 *p;
1330
1331         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332         p = reserve_space(xdr, 28);
1333         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334         *p++ = cpu_to_be32(args->reclaim);
1335         p = xdr_encode_hyper(p, args->fl->fl_start);
1336         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337         *p = cpu_to_be32(args->new_lock_owner);
1338         if (args->new_lock_owner){
1339                 encode_nfs4_seqid(xdr, args->open_seqid);
1340                 encode_nfs4_stateid(xdr, &args->open_stateid);
1341                 encode_nfs4_seqid(xdr, args->lock_seqid);
1342                 encode_lockowner(xdr, &args->lock_owner);
1343         }
1344         else {
1345                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1346                 encode_nfs4_seqid(xdr, args->lock_seqid);
1347         }
1348 }
1349
1350 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351 {
1352         __be32 *p;
1353
1354         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355         p = reserve_space(xdr, 20);
1356         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357         p = xdr_encode_hyper(p, args->fl->fl_start);
1358         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359         encode_lockowner(xdr, &args->lock_owner);
1360 }
1361
1362 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363 {
1364         __be32 *p;
1365
1366         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368         encode_nfs4_seqid(xdr, args->seqid);
1369         encode_nfs4_stateid(xdr, &args->stateid);
1370         p = reserve_space(xdr, 16);
1371         p = xdr_encode_hyper(p, args->fl->fl_start);
1372         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373 }
1374
1375 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376 {
1377         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378         encode_lockowner(xdr, lowner);
1379 }
1380
1381 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382 {
1383         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384         encode_string(xdr, name->len, name->name);
1385 }
1386
1387 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1388 {
1389         __be32 *p;
1390
1391         p = reserve_space(xdr, 8);
1392         *p++ = cpu_to_be32(share_access);
1393         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1394 }
1395
1396 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397 {
1398         __be32 *p;
1399  /*
1400  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1401  * owner 4 = 32
1402  */
1403         encode_nfs4_seqid(xdr, arg->seqid);
1404         encode_share_access(xdr, arg->share_access);
1405         p = reserve_space(xdr, 36);
1406         p = xdr_encode_hyper(p, arg->clientid);
1407         *p++ = cpu_to_be32(24);
1408         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1409         *p++ = cpu_to_be32(arg->server->s_dev);
1410         *p++ = cpu_to_be32(arg->id.uniquifier);
1411         xdr_encode_hyper(p, arg->id.create_time);
1412 }
1413
1414 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1415 {
1416         __be32 *p;
1417
1418         p = reserve_space(xdr, 4);
1419         switch(arg->createmode) {
1420         case NFS4_CREATE_UNCHECKED:
1421                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1422                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1423                              &arg->umask);
1424                 break;
1425         case NFS4_CREATE_GUARDED:
1426                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1427                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1428                              &arg->umask);
1429                 break;
1430         case NFS4_CREATE_EXCLUSIVE:
1431                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1432                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1433                 break;
1434         case NFS4_CREATE_EXCLUSIVE4_1:
1435                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1436                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1437                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true,
1438                              &arg->umask);
1439         }
1440 }
1441
1442 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1443 {
1444         __be32 *p;
1445
1446         p = reserve_space(xdr, 4);
1447         switch (arg->open_flags & O_CREAT) {
1448         case 0:
1449                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1450                 break;
1451         default:
1452                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1453                 encode_createmode(xdr, arg);
1454         }
1455 }
1456
1457 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1458 {
1459         __be32 *p;
1460
1461         p = reserve_space(xdr, 4);
1462         switch (delegation_type) {
1463         case 0:
1464                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1465                 break;
1466         case FMODE_READ:
1467                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1468                 break;
1469         case FMODE_WRITE|FMODE_READ:
1470                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1471                 break;
1472         default:
1473                 BUG();
1474         }
1475 }
1476
1477 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1478 {
1479         __be32 *p;
1480
1481         p = reserve_space(xdr, 4);
1482         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1483         encode_string(xdr, name->len, name->name);
1484 }
1485
1486 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4);
1491         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1492         encode_delegation_type(xdr, type);
1493 }
1494
1495 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1496 {
1497         __be32 *p;
1498
1499         p = reserve_space(xdr, 4);
1500         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1501         encode_nfs4_stateid(xdr, stateid);
1502         encode_string(xdr, name->len, name->name);
1503 }
1504
1505 static inline void encode_claim_fh(struct xdr_stream *xdr)
1506 {
1507         __be32 *p;
1508
1509         p = reserve_space(xdr, 4);
1510         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1511 }
1512
1513 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1514 {
1515         __be32 *p;
1516
1517         p = reserve_space(xdr, 4);
1518         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1519         encode_nfs4_stateid(xdr, stateid);
1520 }
1521
1522 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1523 {
1524         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1525         encode_openhdr(xdr, arg);
1526         encode_opentype(xdr, arg);
1527         switch (arg->claim) {
1528         case NFS4_OPEN_CLAIM_NULL:
1529                 encode_claim_null(xdr, arg->name);
1530                 break;
1531         case NFS4_OPEN_CLAIM_PREVIOUS:
1532                 encode_claim_previous(xdr, arg->u.delegation_type);
1533                 break;
1534         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1535                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1536                 break;
1537         case NFS4_OPEN_CLAIM_FH:
1538                 encode_claim_fh(xdr);
1539                 break;
1540         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1541                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1542                 break;
1543         default:
1544                 BUG();
1545         }
1546 }
1547
1548 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1549 {
1550         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1551         encode_nfs4_stateid(xdr, arg->stateid);
1552         encode_nfs4_seqid(xdr, arg->seqid);
1553 }
1554
1555 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1556 {
1557         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1558         encode_nfs4_stateid(xdr, &arg->stateid);
1559         encode_nfs4_seqid(xdr, arg->seqid);
1560         encode_share_access(xdr, arg->share_access);
1561 }
1562
1563 static void
1564 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1565 {
1566         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1567         encode_string(xdr, fh->size, fh->data);
1568 }
1569
1570 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1571 {
1572         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1573 }
1574
1575 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1576                         struct compound_hdr *hdr)
1577 {
1578         __be32 *p;
1579
1580         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1581         encode_nfs4_stateid(xdr, &args->stateid);
1582
1583         p = reserve_space(xdr, 12);
1584         p = xdr_encode_hyper(p, args->offset);
1585         *p = cpu_to_be32(args->count);
1586 }
1587
1588 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1589 {
1590         uint32_t attrs[3] = {
1591                 FATTR4_WORD0_RDATTR_ERROR,
1592                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1593         };
1594         uint32_t dircount = readdir->count >> 1;
1595         __be32 *p, verf[2];
1596         uint32_t attrlen = 0;
1597         unsigned int i;
1598
1599         if (readdir->plus) {
1600                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1601                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1602                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1603                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1604                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1605                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1606                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1607                 dircount >>= 1;
1608         }
1609         /* Use mounted_on_fileid only if the server supports it */
1610         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1611                 attrs[0] |= FATTR4_WORD0_FILEID;
1612         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1613                 attrs[i] &= readdir->bitmask[i];
1614                 if (attrs[i] != 0)
1615                         attrlen = i+1;
1616         }
1617
1618         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1619         encode_uint64(xdr, readdir->cookie);
1620         encode_nfs4_verifier(xdr, &readdir->verifier);
1621         p = reserve_space(xdr, 12 + (attrlen << 2));
1622         *p++ = cpu_to_be32(dircount);
1623         *p++ = cpu_to_be32(readdir->count);
1624         *p++ = cpu_to_be32(attrlen);
1625         for (i = 0; i < attrlen; i++)
1626                 *p++ = cpu_to_be32(attrs[i]);
1627         memcpy(verf, readdir->verifier.data, sizeof(verf));
1628
1629         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1630                         __func__,
1631                         (unsigned long long)readdir->cookie,
1632                         verf[0], verf[1],
1633                         attrs[0] & readdir->bitmask[0],
1634                         attrs[1] & readdir->bitmask[1],
1635                         attrs[2] & readdir->bitmask[2]);
1636 }
1637
1638 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1639 {
1640         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1641 }
1642
1643 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1644 {
1645         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1646         encode_string(xdr, name->len, name->name);
1647 }
1648
1649 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1650 {
1651         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1652         encode_string(xdr, oldname->len, oldname->name);
1653         encode_string(xdr, newname->len, newname->name);
1654 }
1655
1656 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1657                          struct compound_hdr *hdr)
1658 {
1659         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1660         encode_uint64(xdr, clid);
1661 }
1662
1663 static void
1664 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1665 {
1666         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1667 }
1668
1669 static void
1670 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1671 {
1672         __be32 *p;
1673
1674         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1675         encode_nfs4_stateid(xdr, &zero_stateid);
1676         p = reserve_space(xdr, 2*4);
1677         *p++ = cpu_to_be32(1);
1678         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1679         p = reserve_space(xdr, 4);
1680         *p = cpu_to_be32(arg->acl_len);
1681         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1682 }
1683
1684 static void
1685 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1686 {
1687         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1688 }
1689
1690 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1691 {
1692         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1693         encode_nfs4_stateid(xdr, &arg->stateid);
1694         encode_attrs(xdr, arg->iap, arg->label, server, false, NULL);
1695 }
1696
1697 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1698 {
1699         __be32 *p;
1700
1701         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1702         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1703
1704         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1705                         setclientid->sc_clnt->cl_owner_id);
1706         p = reserve_space(xdr, 4);
1707         *p = cpu_to_be32(setclientid->sc_prog);
1708         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1709         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1710         p = reserve_space(xdr, 4);
1711         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1712 }
1713
1714 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1715 {
1716         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1717                         decode_setclientid_confirm_maxsz, hdr);
1718         encode_uint64(xdr, arg->clientid);
1719         encode_nfs4_verifier(xdr, &arg->confirm);
1720 }
1721
1722 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1723                          struct compound_hdr *hdr)
1724 {
1725         __be32 *p;
1726
1727         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1728         encode_nfs4_stateid(xdr, &args->stateid);
1729
1730         p = reserve_space(xdr, 16);
1731         p = xdr_encode_hyper(p, args->offset);
1732         *p++ = cpu_to_be32(args->stable);
1733         *p = cpu_to_be32(args->count);
1734
1735         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1736 }
1737
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1741         encode_nfs4_stateid(xdr, stateid);
1742 }
1743
1744 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1745 {
1746         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1747         encode_string(xdr, name->len, name->name);
1748 }
1749
1750 #if defined(CONFIG_NFS_V4_1)
1751 /* NFSv4.1 operations */
1752 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1753                                    struct nfs41_bind_conn_to_session_args *args,
1754                                    struct compound_hdr *hdr)
1755 {
1756         __be32 *p;
1757
1758         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1759                 decode_bind_conn_to_session_maxsz, hdr);
1760         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1761         p = xdr_reserve_space(xdr, 8);
1762         *p++ = cpu_to_be32(args->dir);
1763         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1764 }
1765
1766 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1767 {
1768         unsigned int i;
1769         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1770         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1771                 encode_uint32(xdr, op_map->u.words[i]);
1772 }
1773
1774 static void encode_exchange_id(struct xdr_stream *xdr,
1775                                struct nfs41_exchange_id_args *args,
1776                                struct compound_hdr *hdr)
1777 {
1778         __be32 *p;
1779         char impl_name[IMPL_NAME_LIMIT];
1780         int len = 0;
1781
1782         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1783         encode_nfs4_verifier(xdr, args->verifier);
1784
1785         encode_string(xdr, strlen(args->client->cl_owner_id),
1786                         args->client->cl_owner_id);
1787
1788         encode_uint32(xdr, args->flags);
1789         encode_uint32(xdr, args->state_protect.how);
1790
1791         switch (args->state_protect.how) {
1792         case SP4_NONE:
1793                 break;
1794         case SP4_MACH_CRED:
1795                 encode_op_map(xdr, &args->state_protect.enforce);
1796                 encode_op_map(xdr, &args->state_protect.allow);
1797                 break;
1798         default:
1799                 WARN_ON_ONCE(1);
1800                 break;
1801         }
1802
1803         if (send_implementation_id &&
1804             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1805             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1806                 <= sizeof(impl_name) + 1)
1807                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1808                                utsname()->sysname, utsname()->release,
1809                                utsname()->version, utsname()->machine);
1810
1811         if (len > 0) {
1812                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1813
1814                 encode_string(xdr,
1815                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1816                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1817                 encode_string(xdr, len, impl_name);
1818                 /* just send zeros for nii_date - the date is in nii_name */
1819                 p = reserve_space(xdr, 12);
1820                 p = xdr_encode_hyper(p, 0);
1821                 *p = cpu_to_be32(0);
1822         } else
1823                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1824 }
1825
1826 static void encode_create_session(struct xdr_stream *xdr,
1827                                   struct nfs41_create_session_args *args,
1828                                   struct compound_hdr *hdr)
1829 {
1830         __be32 *p;
1831         struct nfs_client *clp = args->client;
1832         struct rpc_clnt *clnt = clp->cl_rpcclient;
1833         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1834         u32 max_resp_sz_cached;
1835
1836         /*
1837          * Assumes OPEN is the biggest non-idempotent compound.
1838          * 2 is the verifier.
1839          */
1840         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1841                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1842
1843         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1844         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1845         p = xdr_encode_hyper(p, args->clientid);
1846         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1847         *p++ = cpu_to_be32(args->flags);                        /*flags */
1848
1849         /* Fore Channel */
1850         *p++ = cpu_to_be32(0);                          /* header padding size */
1851         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1852         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1853         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1854         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1855         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1856         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1857
1858         /* Back Channel */
1859         *p++ = cpu_to_be32(0);                          /* header padding size */
1860         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1861         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1862         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1863         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1864         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1865         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1866
1867         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1868         *p++ = cpu_to_be32(1);
1869         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1870
1871         /* authsys_parms rfc1831 */
1872         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1873         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1874         *p++ = cpu_to_be32(0);                          /* UID */
1875         *p++ = cpu_to_be32(0);                          /* GID */
1876         *p = cpu_to_be32(0);                            /* No more gids */
1877 }
1878
1879 static void encode_destroy_session(struct xdr_stream *xdr,
1880                                    struct nfs4_session *session,
1881                                    struct compound_hdr *hdr)
1882 {
1883         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1884         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1885 }
1886
1887 static void encode_destroy_clientid(struct xdr_stream *xdr,
1888                                    uint64_t clientid,
1889                                    struct compound_hdr *hdr)
1890 {
1891         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1892         encode_uint64(xdr, clientid);
1893 }
1894
1895 static void encode_reclaim_complete(struct xdr_stream *xdr,
1896                                     struct nfs41_reclaim_complete_args *args,
1897                                     struct compound_hdr *hdr)
1898 {
1899         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1900         encode_uint32(xdr, args->one_fs);
1901 }
1902 #endif /* CONFIG_NFS_V4_1 */
1903
1904 static void encode_sequence(struct xdr_stream *xdr,
1905                             const struct nfs4_sequence_args *args,
1906                             struct compound_hdr *hdr)
1907 {
1908 #if defined(CONFIG_NFS_V4_1)
1909         struct nfs4_session *session;
1910         struct nfs4_slot_table *tp;
1911         struct nfs4_slot *slot = args->sa_slot;
1912         __be32 *p;
1913
1914         tp = slot->table;
1915         session = tp->session;
1916         if (!session)
1917                 return;
1918
1919         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1920
1921         /*
1922          * Sessionid + seqid + slotid + max slotid + cache_this
1923          */
1924         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1925                 "max_slotid=%d cache_this=%d\n",
1926                 __func__,
1927                 ((u32 *)session->sess_id.data)[0],
1928                 ((u32 *)session->sess_id.data)[1],
1929                 ((u32 *)session->sess_id.data)[2],
1930                 ((u32 *)session->sess_id.data)[3],
1931                 slot->seq_nr, slot->slot_nr,
1932                 tp->highest_used_slotid, args->sa_cache_this);
1933         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1934         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1935         *p++ = cpu_to_be32(slot->seq_nr);
1936         *p++ = cpu_to_be32(slot->slot_nr);
1937         *p++ = cpu_to_be32(tp->highest_used_slotid);
1938         *p = cpu_to_be32(args->sa_cache_this);
1939 #endif /* CONFIG_NFS_V4_1 */
1940 }
1941
1942 #ifdef CONFIG_NFS_V4_1
1943 static void
1944 encode_getdeviceinfo(struct xdr_stream *xdr,
1945                      const struct nfs4_getdeviceinfo_args *args,
1946                      struct compound_hdr *hdr)
1947 {
1948         __be32 *p;
1949
1950         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1951         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1952         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1953                                     NFS4_DEVICEID4_SIZE);
1954         *p++ = cpu_to_be32(args->pdev->layout_type);
1955         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1956
1957         p = reserve_space(xdr, 4 + 4);
1958         *p++ = cpu_to_be32(1);                  /* bitmap length */
1959         *p++ = cpu_to_be32(args->notify_types);
1960 }
1961
1962 static void
1963 encode_layoutget(struct xdr_stream *xdr,
1964                       const struct nfs4_layoutget_args *args,
1965                       struct compound_hdr *hdr)
1966 {
1967         __be32 *p;
1968
1969         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1970         p = reserve_space(xdr, 36);
1971         *p++ = cpu_to_be32(0);     /* Signal layout available */
1972         *p++ = cpu_to_be32(args->type);
1973         *p++ = cpu_to_be32(args->range.iomode);
1974         p = xdr_encode_hyper(p, args->range.offset);
1975         p = xdr_encode_hyper(p, args->range.length);
1976         p = xdr_encode_hyper(p, args->minlength);
1977         encode_nfs4_stateid(xdr, &args->stateid);
1978         encode_uint32(xdr, args->maxcount);
1979
1980         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1981                 __func__,
1982                 args->type,
1983                 args->range.iomode,
1984                 (unsigned long)args->range.offset,
1985                 (unsigned long)args->range.length,
1986                 args->maxcount);
1987 }
1988
1989 static int
1990 encode_layoutcommit(struct xdr_stream *xdr,
1991                     struct inode *inode,
1992                     struct nfs4_layoutcommit_args *args,
1993                     struct compound_hdr *hdr)
1994 {
1995         __be32 *p;
1996
1997         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1998                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1999
2000         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2001         p = reserve_space(xdr, 20);
2002         /* Only whole file layouts */
2003         p = xdr_encode_hyper(p, 0); /* offset */
2004         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2005         *p = cpu_to_be32(0); /* reclaim */
2006         encode_nfs4_stateid(xdr, &args->stateid);
2007         if (args->lastbytewritten != U64_MAX) {
2008                 p = reserve_space(xdr, 20);
2009                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2010                 p = xdr_encode_hyper(p, args->lastbytewritten);
2011         } else {
2012                 p = reserve_space(xdr, 12);
2013                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2014         }
2015         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2016         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2017
2018         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2019                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2020                         NFS_I(inode)->layout, xdr, args);
2021         } else {
2022                 encode_uint32(xdr, args->layoutupdate_len);
2023                 if (args->layoutupdate_pages) {
2024                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025                                         args->layoutupdate_len);
2026                 }
2027         }
2028
2029         return 0;
2030 }
2031
2032 static void
2033 encode_layoutreturn(struct xdr_stream *xdr,
2034                     const struct nfs4_layoutreturn_args *args,
2035                     struct compound_hdr *hdr)
2036 {
2037         const struct pnfs_layoutdriver_type *lr_ops = NFS_SERVER(args->inode)->pnfs_curr_ld;
2038         __be32 *p;
2039
2040         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041         p = reserve_space(xdr, 16);
2042         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2043         *p++ = cpu_to_be32(args->layout_type);
2044         *p++ = cpu_to_be32(args->range.iomode);
2045         *p = cpu_to_be32(RETURN_FILE);
2046         p = reserve_space(xdr, 16);
2047         p = xdr_encode_hyper(p, args->range.offset);
2048         p = xdr_encode_hyper(p, args->range.length);
2049         spin_lock(&args->inode->i_lock);
2050         encode_nfs4_stateid(xdr, &args->stateid);
2051         spin_unlock(&args->inode->i_lock);
2052         if (args->ld_private->ops && args->ld_private->ops->encode)
2053                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2054         else if (lr_ops->encode_layoutreturn)
2055                 lr_ops->encode_layoutreturn(xdr, args);
2056         else
2057                 encode_uint32(xdr, 0);
2058 }
2059
2060 static int
2061 encode_secinfo_no_name(struct xdr_stream *xdr,
2062                        const struct nfs41_secinfo_no_name_args *args,
2063                        struct compound_hdr *hdr)
2064 {
2065         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2066         encode_uint32(xdr, args->style);
2067         return 0;
2068 }
2069
2070 static void encode_test_stateid(struct xdr_stream *xdr,
2071                                 struct nfs41_test_stateid_args *args,
2072                                 struct compound_hdr *hdr)
2073 {
2074         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2075         encode_uint32(xdr, 1);
2076         encode_nfs4_stateid(xdr, args->stateid);
2077 }
2078
2079 static void encode_free_stateid(struct xdr_stream *xdr,
2080                                 struct nfs41_free_stateid_args *args,
2081                                 struct compound_hdr *hdr)
2082 {
2083         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2084         encode_nfs4_stateid(xdr, &args->stateid);
2085 }
2086 #else
2087 static inline void
2088 encode_layoutreturn(struct xdr_stream *xdr,
2089                     const struct nfs4_layoutreturn_args *args,
2090                     struct compound_hdr *hdr)
2091 {
2092 }
2093 #endif /* CONFIG_NFS_V4_1 */
2094
2095 /*
2096  * END OF "GENERIC" ENCODE ROUTINES.
2097  */
2098
2099 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2100 {
2101 #if defined(CONFIG_NFS_V4_1)
2102         struct nfs4_session *session = args->sa_slot->table->session;
2103         if (session)
2104                 return session->clp->cl_mvops->minor_version;
2105 #endif /* CONFIG_NFS_V4_1 */
2106         return 0;
2107 }
2108
2109 /*
2110  * Encode an ACCESS request
2111  */
2112 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                 const struct nfs4_accessargs *args)
2114 {
2115         struct compound_hdr hdr = {
2116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117         };
2118
2119         encode_compound_hdr(xdr, req, &hdr);
2120         encode_sequence(xdr, &args->seq_args, &hdr);
2121         encode_putfh(xdr, args->fh, &hdr);
2122         encode_access(xdr, args->access, &hdr);
2123         encode_getfattr(xdr, args->bitmask, &hdr);
2124         encode_nops(&hdr);
2125 }
2126
2127 /*
2128  * Encode LOOKUP request
2129  */
2130 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2131                                 const struct nfs4_lookup_arg *args)
2132 {
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_putfh(xdr, args->dir_fh, &hdr);
2140         encode_lookup(xdr, args->name, &hdr);
2141         encode_getfh(xdr, &hdr);
2142         encode_getfattr(xdr, args->bitmask, &hdr);
2143         encode_nops(&hdr);
2144 }
2145
2146 /*
2147  * Encode LOOKUP_ROOT request
2148  */
2149 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2150                                      struct xdr_stream *xdr,
2151                                      const struct nfs4_lookup_root_arg *args)
2152 {
2153         struct compound_hdr hdr = {
2154                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155         };
2156
2157         encode_compound_hdr(xdr, req, &hdr);
2158         encode_sequence(xdr, &args->seq_args, &hdr);
2159         encode_putrootfh(xdr, &hdr);
2160         encode_getfh(xdr, &hdr);
2161         encode_getfattr(xdr, args->bitmask, &hdr);
2162         encode_nops(&hdr);
2163 }
2164
2165 /*
2166  * Encode REMOVE request
2167  */
2168 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2169                                 const struct nfs_removeargs *args)
2170 {
2171         struct compound_hdr hdr = {
2172                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2173         };
2174
2175         encode_compound_hdr(xdr, req, &hdr);
2176         encode_sequence(xdr, &args->seq_args, &hdr);
2177         encode_putfh(xdr, args->fh, &hdr);
2178         encode_remove(xdr, &args->name, &hdr);
2179         encode_nops(&hdr);
2180 }
2181
2182 /*
2183  * Encode RENAME request
2184  */
2185 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2186                                 const struct nfs_renameargs *args)
2187 {
2188         struct compound_hdr hdr = {
2189                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190         };
2191
2192         encode_compound_hdr(xdr, req, &hdr);
2193         encode_sequence(xdr, &args->seq_args, &hdr);
2194         encode_putfh(xdr, args->old_dir, &hdr);
2195         encode_savefh(xdr, &hdr);
2196         encode_putfh(xdr, args->new_dir, &hdr);
2197         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2198         encode_nops(&hdr);
2199 }
2200
2201 /*
2202  * Encode LINK request
2203  */
2204 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2205                              const struct nfs4_link_arg *args)
2206 {
2207         struct compound_hdr hdr = {
2208                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209         };
2210
2211         encode_compound_hdr(xdr, req, &hdr);
2212         encode_sequence(xdr, &args->seq_args, &hdr);
2213         encode_putfh(xdr, args->fh, &hdr);
2214         encode_savefh(xdr, &hdr);
2215         encode_putfh(xdr, args->dir_fh, &hdr);
2216         encode_link(xdr, args->name, &hdr);
2217         encode_restorefh(xdr, &hdr);
2218         encode_getfattr(xdr, args->bitmask, &hdr);
2219         encode_nops(&hdr);
2220 }
2221
2222 /*
2223  * Encode CREATE request
2224  */
2225 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2226                                 const struct nfs4_create_arg *args)
2227 {
2228         struct compound_hdr hdr = {
2229                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230         };
2231
2232         encode_compound_hdr(xdr, req, &hdr);
2233         encode_sequence(xdr, &args->seq_args, &hdr);
2234         encode_putfh(xdr, args->dir_fh, &hdr);
2235         encode_create(xdr, args, &hdr);
2236         encode_getfh(xdr, &hdr);
2237         encode_getfattr(xdr, args->bitmask, &hdr);
2238         encode_nops(&hdr);
2239 }
2240
2241 /*
2242  * Encode SYMLINK request
2243  */
2244 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2245                                  const struct nfs4_create_arg *args)
2246 {
2247         nfs4_xdr_enc_create(req, xdr, args);
2248 }
2249
2250 /*
2251  * Encode GETATTR request
2252  */
2253 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2254                                  const struct nfs4_getattr_arg *args)
2255 {
2256         struct compound_hdr hdr = {
2257                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258         };
2259
2260         encode_compound_hdr(xdr, req, &hdr);
2261         encode_sequence(xdr, &args->seq_args, &hdr);
2262         encode_putfh(xdr, args->fh, &hdr);
2263         encode_getfattr(xdr, args->bitmask, &hdr);
2264         encode_nops(&hdr);
2265 }
2266
2267 /*
2268  * Encode a CLOSE request
2269  */
2270 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2271                                struct nfs_closeargs *args)
2272 {
2273         struct compound_hdr hdr = {
2274                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275         };
2276
2277         encode_compound_hdr(xdr, req, &hdr);
2278         encode_sequence(xdr, &args->seq_args, &hdr);
2279         encode_putfh(xdr, args->fh, &hdr);
2280         if (args->lr_args)
2281                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2282         if (args->bitmask != NULL)
2283                 encode_getfattr(xdr, args->bitmask, &hdr);
2284         encode_close(xdr, args, &hdr);
2285         encode_nops(&hdr);
2286 }
2287
2288 /*
2289  * Encode an OPEN request
2290  */
2291 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2292                               struct nfs_openargs *args)
2293 {
2294         struct compound_hdr hdr = {
2295                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2296         };
2297
2298         encode_compound_hdr(xdr, req, &hdr);
2299         encode_sequence(xdr, &args->seq_args, &hdr);
2300         encode_putfh(xdr, args->fh, &hdr);
2301         encode_open(xdr, args, &hdr);
2302         encode_getfh(xdr, &hdr);
2303         if (args->access)
2304                 encode_access(xdr, args->access, &hdr);
2305         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2306         encode_nops(&hdr);
2307 }
2308
2309 /*
2310  * Encode an OPEN_CONFIRM request
2311  */
2312 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2313                                       struct xdr_stream *xdr,
2314                                       struct nfs_open_confirmargs *args)
2315 {
2316         struct compound_hdr hdr = {
2317                 .nops   = 0,
2318         };
2319
2320         encode_compound_hdr(xdr, req, &hdr);
2321         encode_putfh(xdr, args->fh, &hdr);
2322         encode_open_confirm(xdr, args, &hdr);
2323         encode_nops(&hdr);
2324 }
2325
2326 /*
2327  * Encode an OPEN request with no attributes.
2328  */
2329 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2330                                      struct xdr_stream *xdr,
2331                                      struct nfs_openargs *args)
2332 {
2333         struct compound_hdr hdr = {
2334                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2335         };
2336
2337         encode_compound_hdr(xdr, req, &hdr);
2338         encode_sequence(xdr, &args->seq_args, &hdr);
2339         encode_putfh(xdr, args->fh, &hdr);
2340         encode_open(xdr, args, &hdr);
2341         if (args->access)
2342                 encode_access(xdr, args->access, &hdr);
2343         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344         encode_nops(&hdr);
2345 }
2346
2347 /*
2348  * Encode an OPEN_DOWNGRADE request
2349  */
2350 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2351                                         struct xdr_stream *xdr,
2352                                         struct nfs_closeargs *args)
2353 {
2354         struct compound_hdr hdr = {
2355                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356         };
2357
2358         encode_compound_hdr(xdr, req, &hdr);
2359         encode_sequence(xdr, &args->seq_args, &hdr);
2360         encode_putfh(xdr, args->fh, &hdr);
2361         if (args->lr_args)
2362                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2363         encode_open_downgrade(xdr, args, &hdr);
2364         encode_nops(&hdr);
2365 }
2366
2367 /*
2368  * Encode a LOCK request
2369  */
2370 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2371                               struct nfs_lock_args *args)
2372 {
2373         struct compound_hdr hdr = {
2374                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2375         };
2376
2377         encode_compound_hdr(xdr, req, &hdr);
2378         encode_sequence(xdr, &args->seq_args, &hdr);
2379         encode_putfh(xdr, args->fh, &hdr);
2380         encode_lock(xdr, args, &hdr);
2381         encode_nops(&hdr);
2382 }
2383
2384 /*
2385  * Encode a LOCKT request
2386  */
2387 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2388                                struct nfs_lockt_args *args)
2389 {
2390         struct compound_hdr hdr = {
2391                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2392         };
2393
2394         encode_compound_hdr(xdr, req, &hdr);
2395         encode_sequence(xdr, &args->seq_args, &hdr);
2396         encode_putfh(xdr, args->fh, &hdr);
2397         encode_lockt(xdr, args, &hdr);
2398         encode_nops(&hdr);
2399 }
2400
2401 /*
2402  * Encode a LOCKU request
2403  */
2404 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2405                                struct nfs_locku_args *args)
2406 {
2407         struct compound_hdr hdr = {
2408                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409         };
2410
2411         encode_compound_hdr(xdr, req, &hdr);
2412         encode_sequence(xdr, &args->seq_args, &hdr);
2413         encode_putfh(xdr, args->fh, &hdr);
2414         encode_locku(xdr, args, &hdr);
2415         encode_nops(&hdr);
2416 }
2417
2418 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2419                                            struct xdr_stream *xdr,
2420                                         struct nfs_release_lockowner_args *args)
2421 {
2422         struct compound_hdr hdr = {
2423                 .minorversion = 0,
2424         };
2425
2426         encode_compound_hdr(xdr, req, &hdr);
2427         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2428         encode_nops(&hdr);
2429 }
2430
2431 /*
2432  * Encode a READLINK request
2433  */
2434 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2435                                   const struct nfs4_readlink *args)
2436 {
2437         struct compound_hdr hdr = {
2438                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439         };
2440
2441         encode_compound_hdr(xdr, req, &hdr);
2442         encode_sequence(xdr, &args->seq_args, &hdr);
2443         encode_putfh(xdr, args->fh, &hdr);
2444         encode_readlink(xdr, args, req, &hdr);
2445
2446         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2447                         args->pgbase, args->pglen);
2448         encode_nops(&hdr);
2449 }
2450
2451 /*
2452  * Encode a READDIR request
2453  */
2454 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2455                                  const struct nfs4_readdir_arg *args)
2456 {
2457         struct compound_hdr hdr = {
2458                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459         };
2460
2461         encode_compound_hdr(xdr, req, &hdr);
2462         encode_sequence(xdr, &args->seq_args, &hdr);
2463         encode_putfh(xdr, args->fh, &hdr);
2464         encode_readdir(xdr, args, req, &hdr);
2465
2466         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2467                          args->pgbase, args->count);
2468         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2469                         __func__, hdr.replen << 2, args->pages,
2470                         args->pgbase, args->count);
2471         encode_nops(&hdr);
2472 }
2473
2474 /*
2475  * Encode a READ request
2476  */
2477 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2478                               struct nfs_pgio_args *args)
2479 {
2480         struct compound_hdr hdr = {
2481                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2482         };
2483
2484         encode_compound_hdr(xdr, req, &hdr);
2485         encode_sequence(xdr, &args->seq_args, &hdr);
2486         encode_putfh(xdr, args->fh, &hdr);
2487         encode_read(xdr, args, &hdr);
2488
2489         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2490                          args->pages, args->pgbase, args->count);
2491         req->rq_rcv_buf.flags |= XDRBUF_READ;
2492         encode_nops(&hdr);
2493 }
2494
2495 /*
2496  * Encode an SETATTR request
2497  */
2498 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2499                                  struct nfs_setattrargs *args)
2500 {
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                                 struct nfs_getaclargs *args)
2518 {
2519         struct compound_hdr hdr = {
2520                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521         };
2522         uint32_t replen;
2523
2524         encode_compound_hdr(xdr, req, &hdr);
2525         encode_sequence(xdr, &args->seq_args, &hdr);
2526         encode_putfh(xdr, args->fh, &hdr);
2527         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2528         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2529
2530         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2531                 args->acl_pages, 0, args->acl_len);
2532
2533         encode_nops(&hdr);
2534 }
2535
2536 /*
2537  * Encode a WRITE request
2538  */
2539 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2540                                struct nfs_pgio_args *args)
2541 {
2542         struct compound_hdr hdr = {
2543                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544         };
2545
2546         encode_compound_hdr(xdr, req, &hdr);
2547         encode_sequence(xdr, &args->seq_args, &hdr);
2548         encode_putfh(xdr, args->fh, &hdr);
2549         encode_write(xdr, args, &hdr);
2550         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2551         if (args->bitmask)
2552                 encode_getfattr(xdr, args->bitmask, &hdr);
2553         encode_nops(&hdr);
2554 }
2555
2556 /*
2557  *  a COMMIT request
2558  */
2559 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2560                                 struct nfs_commitargs *args)
2561 {
2562         struct compound_hdr hdr = {
2563                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2564         };
2565
2566         encode_compound_hdr(xdr, req, &hdr);
2567         encode_sequence(xdr, &args->seq_args, &hdr);
2568         encode_putfh(xdr, args->fh, &hdr);
2569         encode_commit(xdr, args, &hdr);
2570         encode_nops(&hdr);
2571 }
2572
2573 /*
2574  * FSINFO request
2575  */
2576 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2577                                 struct nfs4_fsinfo_arg *args)
2578 {
2579         struct compound_hdr hdr = {
2580                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581         };
2582
2583         encode_compound_hdr(xdr, req, &hdr);
2584         encode_sequence(xdr, &args->seq_args, &hdr);
2585         encode_putfh(xdr, args->fh, &hdr);
2586         encode_fsinfo(xdr, args->bitmask, &hdr);
2587         encode_nops(&hdr);
2588 }
2589
2590 /*
2591  * a PATHCONF request
2592  */
2593 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2594                                   const struct nfs4_pathconf_arg *args)
2595 {
2596         struct compound_hdr hdr = {
2597                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2598         };
2599
2600         encode_compound_hdr(xdr, req, &hdr);
2601         encode_sequence(xdr, &args->seq_args, &hdr);
2602         encode_putfh(xdr, args->fh, &hdr);
2603         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2604                            &hdr);
2605         encode_nops(&hdr);
2606 }
2607
2608 /*
2609  * a STATFS request
2610  */
2611 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2612                                 const struct nfs4_statfs_arg *args)
2613 {
2614         struct compound_hdr hdr = {
2615                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2616         };
2617
2618         encode_compound_hdr(xdr, req, &hdr);
2619         encode_sequence(xdr, &args->seq_args, &hdr);
2620         encode_putfh(xdr, args->fh, &hdr);
2621         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2622                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2623         encode_nops(&hdr);
2624 }
2625
2626 /*
2627  * GETATTR_BITMAP request
2628  */
2629 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2630                                      struct xdr_stream *xdr,
2631                                      struct nfs4_server_caps_arg *args)
2632 {
2633         const u32 *bitmask = args->bitmask;
2634         struct compound_hdr hdr = {
2635                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2636         };
2637
2638         encode_compound_hdr(xdr, req, &hdr);
2639         encode_sequence(xdr, &args->seq_args, &hdr);
2640         encode_putfh(xdr, args->fhandle, &hdr);
2641         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2642         encode_nops(&hdr);
2643 }
2644
2645 /*
2646  * a RENEW request
2647  */
2648 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2649                                struct nfs_client *clp)
2650 {
2651         struct compound_hdr hdr = {
2652                 .nops   = 0,
2653         };
2654
2655         encode_compound_hdr(xdr, req, &hdr);
2656         encode_renew(xdr, clp->cl_clientid, &hdr);
2657         encode_nops(&hdr);
2658 }
2659
2660 /*
2661  * a SETCLIENTID request
2662  */
2663 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2664                                      struct xdr_stream *xdr,
2665                                      struct nfs4_setclientid *sc)
2666 {
2667         struct compound_hdr hdr = {
2668                 .nops   = 0,
2669         };
2670
2671         encode_compound_hdr(xdr, req, &hdr);
2672         encode_setclientid(xdr, sc, &hdr);
2673         encode_nops(&hdr);
2674 }
2675
2676 /*
2677  * a SETCLIENTID_CONFIRM request
2678  */
2679 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2680                                              struct xdr_stream *xdr,
2681                                              struct nfs4_setclientid_res *arg)
2682 {
2683         struct compound_hdr hdr = {
2684                 .nops   = 0,
2685         };
2686
2687         encode_compound_hdr(xdr, req, &hdr);
2688         encode_setclientid_confirm(xdr, arg, &hdr);
2689         encode_nops(&hdr);
2690 }
2691
2692 /*
2693  * DELEGRETURN request
2694  */
2695 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696                                      struct xdr_stream *xdr,
2697                                      const struct nfs4_delegreturnargs *args)
2698 {
2699         struct compound_hdr hdr = {
2700                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701         };
2702
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_sequence(xdr, &args->seq_args, &hdr);
2705         encode_putfh(xdr, args->fhandle, &hdr);
2706         if (args->lr_args)
2707                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2708         encode_getfattr(xdr, args->bitmask, &hdr);
2709         encode_delegreturn(xdr, args->stateid, &hdr);
2710         encode_nops(&hdr);
2711 }
2712
2713 /*
2714  * Encode FS_LOCATIONS request
2715  */
2716 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2717                                       struct xdr_stream *xdr,
2718                                       struct nfs4_fs_locations_arg *args)
2719 {
2720         struct compound_hdr hdr = {
2721                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2722         };
2723         uint32_t replen;
2724
2725         encode_compound_hdr(xdr, req, &hdr);
2726         encode_sequence(xdr, &args->seq_args, &hdr);
2727         if (args->migration) {
2728                 encode_putfh(xdr, args->fh, &hdr);
2729                 replen = hdr.replen;
2730                 encode_fs_locations(xdr, args->bitmask, &hdr);
2731                 if (args->renew)
2732                         encode_renew(xdr, args->clientid, &hdr);
2733         } else {
2734                 encode_putfh(xdr, args->dir_fh, &hdr);
2735                 encode_lookup(xdr, args->name, &hdr);
2736                 replen = hdr.replen;
2737                 encode_fs_locations(xdr, args->bitmask, &hdr);
2738         }
2739
2740         /* Set up reply kvec to capture returned fs_locations array. */
2741         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2742                         0, PAGE_SIZE);
2743         encode_nops(&hdr);
2744 }
2745
2746 /*
2747  * Encode SECINFO request
2748  */
2749 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2750                                 struct xdr_stream *xdr,
2751                                 struct nfs4_secinfo_arg *args)
2752 {
2753         struct compound_hdr hdr = {
2754                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2755         };
2756
2757         encode_compound_hdr(xdr, req, &hdr);
2758         encode_sequence(xdr, &args->seq_args, &hdr);
2759         encode_putfh(xdr, args->dir_fh, &hdr);
2760         encode_secinfo(xdr, args->name, &hdr);
2761         encode_nops(&hdr);
2762 }
2763
2764 /*
2765  * Encode FSID_PRESENT request
2766  */
2767 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2768                                       struct xdr_stream *xdr,
2769                                       struct nfs4_fsid_present_arg *args)
2770 {
2771         struct compound_hdr hdr = {
2772                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2773         };
2774
2775         encode_compound_hdr(xdr, req, &hdr);
2776         encode_sequence(xdr, &args->seq_args, &hdr);
2777         encode_putfh(xdr, args->fh, &hdr);
2778         encode_getfh(xdr, &hdr);
2779         if (args->renew)
2780                 encode_renew(xdr, args->clientid, &hdr);
2781         encode_nops(&hdr);
2782 }
2783
2784 #if defined(CONFIG_NFS_V4_1)
2785 /*
2786  * BIND_CONN_TO_SESSION request
2787  */
2788 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2789                                 struct xdr_stream *xdr,
2790                                 struct nfs41_bind_conn_to_session_args *args)
2791 {
2792         struct compound_hdr hdr = {
2793                 .minorversion = args->client->cl_mvops->minor_version,
2794         };
2795
2796         encode_compound_hdr(xdr, req, &hdr);
2797         encode_bind_conn_to_session(xdr, args, &hdr);
2798         encode_nops(&hdr);
2799 }
2800
2801 /*
2802  * EXCHANGE_ID request
2803  */
2804 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2805                                      struct xdr_stream *xdr,
2806                                      struct nfs41_exchange_id_args *args)
2807 {
2808         struct compound_hdr hdr = {
2809                 .minorversion = args->client->cl_mvops->minor_version,
2810         };
2811
2812         encode_compound_hdr(xdr, req, &hdr);
2813         encode_exchange_id(xdr, args, &hdr);
2814         encode_nops(&hdr);
2815 }
2816
2817 /*
2818  * a CREATE_SESSION request
2819  */
2820 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2821                                         struct xdr_stream *xdr,
2822                                         struct nfs41_create_session_args *args)
2823 {
2824         struct compound_hdr hdr = {
2825                 .minorversion = args->client->cl_mvops->minor_version,
2826         };
2827
2828         encode_compound_hdr(xdr, req, &hdr);
2829         encode_create_session(xdr, args, &hdr);
2830         encode_nops(&hdr);
2831 }
2832
2833 /*
2834  * a DESTROY_SESSION request
2835  */
2836 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2837                                          struct xdr_stream *xdr,
2838                                          struct nfs4_session *session)
2839 {
2840         struct compound_hdr hdr = {
2841                 .minorversion = session->clp->cl_mvops->minor_version,
2842         };
2843
2844         encode_compound_hdr(xdr, req, &hdr);
2845         encode_destroy_session(xdr, session, &hdr);
2846         encode_nops(&hdr);
2847 }
2848
2849 /*
2850  * a DESTROY_CLIENTID request
2851  */
2852 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2853                                          struct xdr_stream *xdr,
2854                                          struct nfs_client *clp)
2855 {
2856         struct compound_hdr hdr = {
2857                 .minorversion = clp->cl_mvops->minor_version,
2858         };
2859
2860         encode_compound_hdr(xdr, req, &hdr);
2861         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2862         encode_nops(&hdr);
2863 }
2864
2865 /*
2866  * a SEQUENCE request
2867  */
2868 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2869                                   struct nfs4_sequence_args *args)
2870 {
2871         struct compound_hdr hdr = {
2872                 .minorversion = nfs4_xdr_minorversion(args),
2873         };
2874
2875         encode_compound_hdr(xdr, req, &hdr);
2876         encode_sequence(xdr, args, &hdr);
2877         encode_nops(&hdr);
2878 }
2879
2880 /*
2881  * a GET_LEASE_TIME request
2882  */
2883 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2884                                         struct xdr_stream *xdr,
2885                                         struct nfs4_get_lease_time_args *args)
2886 {
2887         struct compound_hdr hdr = {
2888                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2889         };
2890         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2891
2892         encode_compound_hdr(xdr, req, &hdr);
2893         encode_sequence(xdr, &args->la_seq_args, &hdr);
2894         encode_putrootfh(xdr, &hdr);
2895         encode_fsinfo(xdr, lease_bitmap, &hdr);
2896         encode_nops(&hdr);
2897 }
2898
2899 /*
2900  * a RECLAIM_COMPLETE request
2901  */
2902 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2903                                           struct xdr_stream *xdr,
2904                                 struct nfs41_reclaim_complete_args *args)
2905 {
2906         struct compound_hdr hdr = {
2907                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2908         };
2909
2910         encode_compound_hdr(xdr, req, &hdr);
2911         encode_sequence(xdr, &args->seq_args, &hdr);
2912         encode_reclaim_complete(xdr, args, &hdr);
2913         encode_nops(&hdr);
2914 }
2915
2916 /*
2917  * Encode GETDEVICEINFO request
2918  */
2919 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2920                                        struct xdr_stream *xdr,
2921                                        struct nfs4_getdeviceinfo_args *args)
2922 {
2923         struct compound_hdr hdr = {
2924                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2925         };
2926
2927         encode_compound_hdr(xdr, req, &hdr);
2928         encode_sequence(xdr, &args->seq_args, &hdr);
2929         encode_getdeviceinfo(xdr, args, &hdr);
2930
2931         /* set up reply kvec. Subtract notification bitmap max size (2)
2932          * so that notification bitmap is put in xdr_buf tail */
2933         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2934                          args->pdev->pages, args->pdev->pgbase,
2935                          args->pdev->pglen);
2936
2937         encode_nops(&hdr);
2938 }
2939
2940 /*
2941  *  Encode LAYOUTGET request
2942  */
2943 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2944                                    struct xdr_stream *xdr,
2945                                    struct nfs4_layoutget_args *args)
2946 {
2947         struct compound_hdr hdr = {
2948                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2949         };
2950
2951         encode_compound_hdr(xdr, req, &hdr);
2952         encode_sequence(xdr, &args->seq_args, &hdr);
2953         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2954         encode_layoutget(xdr, args, &hdr);
2955
2956         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2957             args->layout.pages, 0, args->layout.pglen);
2958
2959         encode_nops(&hdr);
2960 }
2961
2962 /*
2963  *  Encode LAYOUTCOMMIT request
2964  */
2965 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2966                                       struct xdr_stream *xdr,
2967                                       struct nfs4_layoutcommit_args *args)
2968 {
2969         struct nfs4_layoutcommit_data *data =
2970                 container_of(args, struct nfs4_layoutcommit_data, args);
2971         struct compound_hdr hdr = {
2972                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2973         };
2974
2975         encode_compound_hdr(xdr, req, &hdr);
2976         encode_sequence(xdr, &args->seq_args, &hdr);
2977         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2978         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2979         encode_getfattr(xdr, args->bitmask, &hdr);
2980         encode_nops(&hdr);
2981 }
2982
2983 /*
2984  * Encode LAYOUTRETURN request
2985  */
2986 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2987                                       struct xdr_stream *xdr,
2988                                       struct nfs4_layoutreturn_args *args)
2989 {
2990         struct compound_hdr hdr = {
2991                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2992         };
2993
2994         encode_compound_hdr(xdr, req, &hdr);
2995         encode_sequence(xdr, &args->seq_args, &hdr);
2996         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2997         encode_layoutreturn(xdr, args, &hdr);
2998         encode_nops(&hdr);
2999 }
3000
3001 /*
3002  * Encode SECINFO_NO_NAME request
3003  */
3004 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3005                                         struct xdr_stream *xdr,
3006                                         struct nfs41_secinfo_no_name_args *args)
3007 {
3008         struct compound_hdr hdr = {
3009                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3010         };
3011
3012         encode_compound_hdr(xdr, req, &hdr);
3013         encode_sequence(xdr, &args->seq_args, &hdr);
3014         encode_putrootfh(xdr, &hdr);
3015         encode_secinfo_no_name(xdr, args, &hdr);
3016         encode_nops(&hdr);
3017         return 0;
3018 }
3019
3020 /*
3021  *  Encode TEST_STATEID request
3022  */
3023 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3024                                       struct xdr_stream *xdr,
3025                                       struct nfs41_test_stateid_args *args)
3026 {
3027         struct compound_hdr hdr = {
3028                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3029         };
3030
3031         encode_compound_hdr(xdr, req, &hdr);
3032         encode_sequence(xdr, &args->seq_args, &hdr);
3033         encode_test_stateid(xdr, args, &hdr);
3034         encode_nops(&hdr);
3035 }
3036
3037 /*
3038  *  Encode FREE_STATEID request
3039  */
3040 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3041                                      struct xdr_stream *xdr,
3042                                      struct nfs41_free_stateid_args *args)
3043 {
3044         struct compound_hdr hdr = {
3045                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3046         };
3047
3048         encode_compound_hdr(xdr, req, &hdr);
3049         encode_sequence(xdr, &args->seq_args, &hdr);
3050         encode_free_stateid(xdr, args, &hdr);
3051         encode_nops(&hdr);
3052 }
3053 #endif /* CONFIG_NFS_V4_1 */
3054
3055 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3056 {
3057         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3058                 "Remaining buffer length is %tu words.\n",
3059                 func, xdr->end - xdr->p);
3060 }
3061
3062 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3063 {
3064         __be32 *p;
3065
3066         p = xdr_inline_decode(xdr, 4);
3067         if (unlikely(!p))
3068                 goto out_overflow;
3069         *len = be32_to_cpup(p);
3070         p = xdr_inline_decode(xdr, *len);
3071         if (unlikely(!p))
3072                 goto out_overflow;
3073         *string = (char *)p;
3074         return 0;
3075 out_overflow:
3076         print_overflow_msg(__func__, xdr);
3077         return -EIO;
3078 }
3079
3080 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3081 {
3082         __be32 *p;
3083
3084         p = xdr_inline_decode(xdr, 8);
3085         if (unlikely(!p))
3086                 goto out_overflow;
3087         hdr->status = be32_to_cpup(p++);
3088         hdr->taglen = be32_to_cpup(p);
3089
3090         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3091         if (unlikely(!p))
3092                 goto out_overflow;
3093         hdr->tag = (char *)p;
3094         p += XDR_QUADLEN(hdr->taglen);
3095         hdr->nops = be32_to_cpup(p);
3096         if (unlikely(hdr->nops < 1))
3097                 return nfs4_stat_to_errno(hdr->status);
3098         return 0;
3099 out_overflow:
3100         print_overflow_msg(__func__, xdr);
3101         return -EIO;
3102 }
3103
3104 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3105                 int *nfs_retval)
3106 {
3107         __be32 *p;
3108         uint32_t opnum;
3109         int32_t nfserr;
3110
3111         p = xdr_inline_decode(xdr, 8);
3112         if (unlikely(!p))
3113                 goto out_overflow;
3114         opnum = be32_to_cpup(p++);
3115         if (unlikely(opnum != expected))
3116                 goto out_bad_operation;
3117         nfserr = be32_to_cpup(p);
3118         if (nfserr == NFS_OK)
3119                 *nfs_retval = 0;
3120         else
3121                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3122         return true;
3123 out_bad_operation:
3124         dprintk("nfs: Server returned operation"
3125                 " %d but we issued a request for %d\n",
3126                         opnum, expected);
3127         *nfs_retval = -EREMOTEIO;
3128         return false;
3129 out_overflow:
3130         print_overflow_msg(__func__, xdr);
3131         *nfs_retval = -EIO;
3132         return false;
3133 }
3134
3135 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3136 {
3137         int retval;
3138
3139         __decode_op_hdr(xdr, expected, &retval);
3140         return retval;
3141 }
3142
3143 /* Dummy routine */
3144 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3145 {
3146         __be32 *p;
3147         unsigned int strlen;
3148         char *str;
3149
3150         p = xdr_inline_decode(xdr, 12);
3151         if (likely(p))
3152                 return decode_opaque_inline(xdr, &strlen, &str);
3153         print_overflow_msg(__func__, xdr);
3154         return -EIO;
3155 }
3156
3157 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3158 {
3159         uint32_t bmlen;
3160         __be32 *p;
3161
3162         p = xdr_inline_decode(xdr, 4);
3163         if (unlikely(!p))
3164                 goto out_overflow;
3165         bmlen = be32_to_cpup(p);
3166
3167         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3168         p = xdr_inline_decode(xdr, (bmlen << 2));
3169         if (unlikely(!p))
3170                 goto out_overflow;
3171         if (bmlen > 0) {
3172                 bitmap[0] = be32_to_cpup(p++);
3173                 if (bmlen > 1) {
3174                         bitmap[1] = be32_to_cpup(p++);
3175                         if (bmlen > 2)
3176                                 bitmap[2] = be32_to_cpup(p);
3177                 }
3178         }
3179         return 0;
3180 out_overflow:
3181         print_overflow_msg(__func__, xdr);
3182         return -EIO;
3183 }
3184
3185 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3186 {
3187         __be32 *p;
3188
3189         p = xdr_inline_decode(xdr, 4);
3190         if (unlikely(!p))
3191                 goto out_overflow;
3192         *attrlen = be32_to_cpup(p);
3193         *savep = xdr_stream_pos(xdr);
3194         return 0;
3195 out_overflow:
3196         print_overflow_msg(__func__, xdr);
3197         return -EIO;
3198 }
3199
3200 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3201 {
3202         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3203                 int ret;
3204                 ret = decode_attr_bitmap(xdr, bitmask);
3205                 if (unlikely(ret < 0))
3206                         return ret;
3207                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3208         } else
3209                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3210         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3211                 bitmask[0], bitmask[1], bitmask[2]);
3212         return 0;
3213 }
3214
3215 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3216 {
3217         __be32 *p;
3218         int ret = 0;
3219
3220         *type = 0;
3221         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3222                 return -EIO;
3223         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3224                 p = xdr_inline_decode(xdr, 4);
3225                 if (unlikely(!p))
3226                         goto out_overflow;
3227                 *type = be32_to_cpup(p);
3228                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3229                         dprintk("%s: bad type %d\n", __func__, *type);
3230                         return -EIO;
3231                 }
3232                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3233                 ret = NFS_ATTR_FATTR_TYPE;
3234         }
3235         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3236         return ret;
3237 out_overflow:
3238         print_overflow_msg(__func__, xdr);
3239         return -EIO;
3240 }
3241
3242 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3243                                       uint32_t *bitmap, uint32_t *type)
3244 {
3245         __be32 *p;
3246
3247         *type = 0;
3248         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3249                 return -EIO;
3250         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3251                 p = xdr_inline_decode(xdr, 4);
3252                 if (unlikely(!p))
3253                         goto out_overflow;
3254                 *type = be32_to_cpup(p);
3255                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3256         }
3257         dprintk("%s: expire type=0x%x\n", __func__, *type);
3258         return 0;
3259 out_overflow:
3260         print_overflow_msg(__func__, xdr);
3261         return -EIO;
3262 }
3263
3264 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3265 {
3266         __be32 *p;
3267         int ret = 0;
3268
3269         *change = 0;
3270         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3271                 return -EIO;
3272         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3273                 p = xdr_inline_decode(xdr, 8);
3274                 if (unlikely(!p))
3275                         goto out_overflow;
3276                 xdr_decode_hyper(p, change);
3277                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3278                 ret = NFS_ATTR_FATTR_CHANGE;
3279         }
3280         dprintk("%s: change attribute=%Lu\n", __func__,
3281                         (unsigned long long)*change);
3282         return ret;
3283 out_overflow:
3284         print_overflow_msg(__func__, xdr);
3285         return -EIO;
3286 }
3287
3288 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3289 {
3290         __be32 *p;
3291         int ret = 0;
3292
3293         *size = 0;
3294         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3295                 return -EIO;
3296         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3297                 p = xdr_inline_decode(xdr, 8);
3298                 if (unlikely(!p))
3299                         goto out_overflow;
3300                 xdr_decode_hyper(p, size);
3301                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3302                 ret = NFS_ATTR_FATTR_SIZE;
3303         }
3304         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3305         return ret;
3306 out_overflow:
3307         print_overflow_msg(__func__, xdr);
3308         return -EIO;
3309 }
3310
3311 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3312 {
3313         __be32 *p;
3314
3315         *res = 0;
3316         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3317                 return -EIO;
3318         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3319                 p = xdr_inline_decode(xdr, 4);
3320                 if (unlikely(!p))
3321                         goto out_overflow;
3322                 *res = be32_to_cpup(p);
3323                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3324         }
3325         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3326         return 0;
3327 out_overflow:
3328         print_overflow_msg(__func__, xdr);
3329         return -EIO;
3330 }
3331
3332 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3333 {
3334         __be32 *p;
3335
3336         *res = 0;
3337         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3338                 return -EIO;
3339         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3340                 p = xdr_inline_decode(xdr, 4);
3341                 if (unlikely(!p))
3342                         goto out_overflow;
3343                 *res = be32_to_cpup(p);
3344                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3345         }
3346         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3347         return 0;
3348 out_overflow:
3349         print_overflow_msg(__func__, xdr);
3350         return -EIO;
3351 }
3352
3353 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3354 {
3355         __be32 *p;
3356         int ret = 0;
3357
3358         fsid->major = 0;
3359         fsid->minor = 0;
3360         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3361                 return -EIO;
3362         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3363                 p = xdr_inline_decode(xdr, 16);
3364                 if (unlikely(!p))
3365                         goto out_overflow;
3366                 p = xdr_decode_hyper(p, &fsid->major);
3367                 xdr_decode_hyper(p, &fsid->minor);
3368                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3369                 ret = NFS_ATTR_FATTR_FSID;
3370         }
3371         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3372                         (unsigned long long)fsid->major,
3373                         (unsigned long long)fsid->minor);
3374         return ret;
3375 out_overflow:
3376         print_overflow_msg(__func__, xdr);
3377         return -EIO;
3378 }
3379
3380 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3381 {
3382         __be32 *p;
3383
3384         *res = 60;
3385         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3386                 return -EIO;
3387         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3388                 p = xdr_inline_decode(xdr, 4);
3389                 if (unlikely(!p))
3390                         goto out_overflow;
3391                 *res = be32_to_cpup(p);
3392                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3393         }
3394         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3395         return 0;
3396 out_overflow:
3397         print_overflow_msg(__func__, xdr);
3398         return -EIO;
3399 }
3400
3401 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3402 {
3403         __be32 *p;
3404
3405         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3406                 return -EIO;
3407         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3408                 p = xdr_inline_decode(xdr, 4);
3409                 if (unlikely(!p))
3410                         goto out_overflow;
3411                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3412                 *res = -be32_to_cpup(p);
3413         }
3414         return 0;
3415 out_overflow:
3416         print_overflow_msg(__func__, xdr);
3417         return -EIO;
3418 }
3419
3420 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3421                                  uint32_t *bitmap, uint32_t *bitmask)
3422 {
3423         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3424                 int ret;
3425                 ret = decode_attr_bitmap(xdr, bitmask);
3426                 if (unlikely(ret < 0))
3427                         return ret;
3428                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3429         } else
3430                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3431         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3432                 bitmask[0], bitmask[1], bitmask[2]);
3433         return 0;
3434 }
3435
3436 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3437 {
3438         __be32 *p;
3439         int len;
3440
3441         if (fh != NULL)
3442                 memset(fh, 0, sizeof(*fh));
3443
3444         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3445                 return -EIO;
3446         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3447                 p = xdr_inline_decode(xdr, 4);
3448                 if (unlikely(!p))
3449                         goto out_overflow;
3450                 len = be32_to_cpup(p);
3451                 if (len > NFS4_FHSIZE)
3452                         return -EIO;
3453                 p = xdr_inline_decode(xdr, len);
3454                 if (unlikely(!p))
3455                         goto out_overflow;
3456                 if (fh != NULL) {
3457                         memcpy(fh->data, p, len);
3458                         fh->size = len;
3459                 }
3460                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3461         }
3462         return 0;
3463 out_overflow:
3464         print_overflow_msg(__func__, xdr);
3465         return -EIO;
3466 }
3467
3468 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3469 {
3470         __be32 *p;
3471
3472         *res = 0;
3473         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3474                 return -EIO;
3475         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3476                 p = xdr_inline_decode(xdr, 4);
3477                 if (unlikely(!p))
3478                         goto out_overflow;
3479                 *res = be32_to_cpup(p);
3480                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3481         }
3482         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3483         return 0;
3484 out_overflow:
3485         print_overflow_msg(__func__, xdr);
3486         return -EIO;
3487 }
3488
3489 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3490 {
3491         __be32 *p;
3492         int ret = 0;
3493
3494         *fileid = 0;
3495         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3496                 return -EIO;
3497         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3498                 p = xdr_inline_decode(xdr, 8);
3499                 if (unlikely(!p))
3500                         goto out_overflow;
3501                 xdr_decode_hyper(p, fileid);
3502                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3503                 ret = NFS_ATTR_FATTR_FILEID;
3504         }
3505         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3506         return ret;
3507 out_overflow:
3508         print_overflow_msg(__func__, xdr);
3509         return -EIO;
3510 }
3511
3512 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3513 {
3514         __be32 *p;
3515         int ret = 0;
3516
3517         *fileid = 0;
3518         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3519                 return -EIO;
3520         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3521                 p = xdr_inline_decode(xdr, 8);
3522                 if (unlikely(!p))
3523                         goto out_overflow;
3524                 xdr_decode_hyper(p, fileid);
3525                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3526                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3527         }
3528         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3529         return ret;
3530 out_overflow:
3531         print_overflow_msg(__func__, xdr);
3532         return -EIO;
3533 }
3534
3535 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3536 {
3537         __be32 *p;
3538         int status = 0;
3539
3540         *res = 0;
3541         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3542                 return -EIO;
3543         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3544                 p = xdr_inline_decode(xdr, 8);
3545                 if (unlikely(!p))
3546                         goto out_overflow;
3547                 xdr_decode_hyper(p, res);
3548                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3549         }
3550         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3551         return status;
3552 out_overflow:
3553         print_overflow_msg(__func__, xdr);
3554         return -EIO;
3555 }
3556
3557 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3558 {
3559         __be32 *p;
3560         int status = 0;
3561
3562         *res = 0;
3563         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3564                 return -EIO;
3565         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3566                 p = xdr_inline_decode(xdr, 8);
3567                 if (unlikely(!p))
3568                         goto out_overflow;
3569                 xdr_decode_hyper(p, res);
3570                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3571         }
3572         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3573         return status;
3574 out_overflow:
3575         print_overflow_msg(__func__, xdr);
3576         return -EIO;
3577 }
3578
3579 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3580 {
3581         __be32 *p;
3582         int status = 0;
3583
3584         *res = 0;
3585         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3586                 return -EIO;
3587         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3588                 p = xdr_inline_decode(xdr, 8);
3589                 if (unlikely(!p))
3590                         goto out_overflow;
3591                 xdr_decode_hyper(p, res);
3592                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3593         }
3594         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3595         return status;
3596 out_overflow:
3597         print_overflow_msg(__func__, xdr);
3598         return -EIO;
3599 }
3600
3601 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3602 {
3603         u32 n;
3604         __be32 *p;
3605         int status = 0;
3606
3607         p = xdr_inline_decode(xdr, 4);
3608         if (unlikely(!p))
3609                 goto out_overflow;
3610         n = be32_to_cpup(p);
3611         if (n == 0)
3612                 goto root_path;
3613         dprintk("pathname4: ");
3614         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3615                 dprintk("cannot parse %d components in path\n", n);
3616                 goto out_eio;
3617         }
3618         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3619                 struct nfs4_string *component = &path->components[path->ncomponents];
3620                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3621                 if (unlikely(status != 0))
3622                         goto out_eio;
3623                 ifdebug (XDR)
3624                         pr_cont("%s%.*s ",
3625                                 (path->ncomponents != n ? "/ " : ""),
3626                                 component->len, component->data);
3627         }
3628 out:
3629         return status;
3630 root_path:
3631 /* a root pathname is sent as a zero component4 */
3632         path->ncomponents = 1;
3633         path->components[0].len=0;
3634         path->components[0].data=NULL;
3635         dprintk("pathname4: /\n");
3636         goto out;
3637 out_eio:
3638         dprintk(" status %d", status);
3639         status = -EIO;
3640         goto out;
3641 out_overflow:
3642         print_overflow_msg(__func__, xdr);
3643         return -EIO;
3644 }
3645
3646 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3647 {
3648         int n;
3649         __be32 *p;
3650         int status = -EIO;
3651
3652         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3653                 goto out;
3654         status = 0;
3655         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3656                 goto out;
3657         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3658         status = -EIO;
3659         /* Ignore borken servers that return unrequested attrs */
3660         if (unlikely(res == NULL))
3661                 goto out;
3662         dprintk("%s: fsroot:\n", __func__);
3663         status = decode_pathname(xdr, &res->fs_path);
3664         if (unlikely(status != 0))
3665                 goto out;
3666         p = xdr_inline_decode(xdr, 4);
3667         if (unlikely(!p))
3668                 goto out_overflow;
3669         n = be32_to_cpup(p);
3670         if (n <= 0)
3671                 goto out_eio;
3672         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3673                 u32 m;
3674                 struct nfs4_fs_location *loc;
3675
3676                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3677                         break;
3678                 loc = &res->locations[res->nlocations];
3679                 p = xdr_inline_decode(xdr, 4);
3680                 if (unlikely(!p))
3681                         goto out_overflow;
3682                 m = be32_to_cpup(p);
3683
3684                 dprintk("%s: servers:\n", __func__);
3685                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3686                         struct nfs4_string *server;
3687
3688                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3689                                 unsigned int i;
3690                                 dprintk("%s: using first %u of %u servers "
3691                                         "returned for location %u\n",
3692                                                 __func__,
3693                                                 NFS4_FS_LOCATION_MAXSERVERS,
3694                                                 m, res->nlocations);
3695                                 for (i = loc->nservers; i < m; i++) {
3696                                         unsigned int len;
3697                                         char *data;
3698                                         status = decode_opaque_inline(xdr, &len, &data);
3699                                         if (unlikely(status != 0))
3700                                                 goto out_eio;
3701                                 }
3702                                 break;
3703                         }
3704                         server = &loc->servers[loc->nservers];
3705                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3706                         if (unlikely(status != 0))
3707                                 goto out_eio;
3708                         dprintk("%s ", server->data);
3709                 }
3710                 status = decode_pathname(xdr, &loc->rootpath);
3711                 if (unlikely(status != 0))
3712                         goto out_eio;
3713         }
3714         if (res->nlocations != 0)
3715                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3716 out:
3717         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3718         return status;
3719 out_overflow:
3720         print_overflow_msg(__func__, xdr);
3721 out_eio:
3722         status = -EIO;
3723         goto out;
3724 }
3725
3726 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3727 {
3728         __be32 *p;
3729         int status = 0;
3730
3731         *res = 0;
3732         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3733                 return -EIO;
3734         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3735                 p = xdr_inline_decode(xdr, 8);
3736                 if (unlikely(!p))
3737                         goto out_overflow;
3738                 xdr_decode_hyper(p, res);
3739                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3740         }
3741         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3742         return status;
3743 out_overflow:
3744         print_overflow_msg(__func__, xdr);
3745         return -EIO;
3746 }
3747
3748 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3749 {
3750         __be32 *p;
3751         int status = 0;
3752
3753         *maxlink = 1;
3754         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3755                 return -EIO;
3756         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3757                 p = xdr_inline_decode(xdr, 4);
3758                 if (unlikely(!p))
3759                         goto out_overflow;
3760                 *maxlink = be32_to_cpup(p);
3761                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3762         }
3763         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3764         return status;
3765 out_overflow:
3766         print_overflow_msg(__func__, xdr);
3767         return -EIO;
3768 }
3769
3770 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3771 {
3772         __be32 *p;
3773         int status = 0;
3774
3775         *maxname = 1024;
3776         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3777                 return -EIO;
3778         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3779                 p = xdr_inline_decode(xdr, 4);
3780                 if (unlikely(!p))
3781                         goto out_overflow;
3782                 *maxname = be32_to_cpup(p);
3783                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3784         }
3785         dprintk("%s: maxname=%u\n", __func__, *maxname);
3786         return status;
3787 out_overflow:
3788         print_overflow_msg(__func__, xdr);
3789         return -EIO;
3790 }
3791
3792 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3793 {
3794         __be32 *p;
3795         int status = 0;
3796
3797         *res = 1024;
3798         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3799                 return -EIO;
3800         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3801                 uint64_t maxread;
3802                 p = xdr_inline_decode(xdr, 8);
3803                 if (unlikely(!p))
3804                         goto out_overflow;
3805                 xdr_decode_hyper(p, &maxread);
3806                 if (maxread > 0x7FFFFFFF)
3807                         maxread = 0x7FFFFFFF;
3808                 *res = (uint32_t)maxread;
3809                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3810         }
3811         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3812         return status;
3813 out_overflow:
3814         print_overflow_msg(__func__, xdr);
3815         return -EIO;
3816 }
3817
3818 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3819 {
3820         __be32 *p;
3821         int status = 0;
3822
3823         *res = 1024;
3824         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3825                 return -EIO;
3826         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3827                 uint64_t maxwrite;
3828                 p = xdr_inline_decode(xdr, 8);
3829                 if (unlikely(!p))
3830                         goto out_overflow;
3831                 xdr_decode_hyper(p, &maxwrite);
3832                 if (maxwrite > 0x7FFFFFFF)
3833                         maxwrite = 0x7FFFFFFF;
3834                 *res = (uint32_t)maxwrite;
3835                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3836         }
3837         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3838         return status;
3839 out_overflow:
3840         print_overflow_msg(__func__, xdr);
3841         return -EIO;
3842 }
3843
3844 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3845 {
3846         uint32_t tmp;
3847         __be32 *p;
3848         int ret = 0;
3849
3850         *mode = 0;
3851         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3852                 return -EIO;
3853         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3854                 p = xdr_inline_decode(xdr, 4);
3855                 if (unlikely(!p))
3856                         goto out_overflow;
3857                 tmp = be32_to_cpup(p);
3858                 *mode = tmp & ~S_IFMT;
3859                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3860                 ret = NFS_ATTR_FATTR_MODE;
3861         }
3862         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3863         return ret;
3864 out_overflow:
3865         print_overflow_msg(__func__, xdr);
3866         return -EIO;
3867 }
3868
3869 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3870 {
3871         __be32 *p;
3872         int ret = 0;
3873
3874         *nlink = 1;
3875         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3876                 return -EIO;
3877         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3878                 p = xdr_inline_decode(xdr, 4);
3879                 if (unlikely(!p))
3880                         goto out_overflow;
3881                 *nlink = be32_to_cpup(p);
3882                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3883                 ret = NFS_ATTR_FATTR_NLINK;
3884         }
3885         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3886         return ret;
3887 out_overflow:
3888         print_overflow_msg(__func__, xdr);
3889         return -EIO;
3890 }
3891
3892 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3893                 const struct nfs_server *server, kuid_t *uid,
3894                 struct nfs4_string *owner_name)
3895 {
3896         uint32_t len;
3897         __be32 *p;
3898         int ret = 0;
3899
3900         *uid = make_kuid(&init_user_ns, -2);
3901         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3902                 return -EIO;
3903         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3904                 p = xdr_inline_decode(xdr, 4);
3905                 if (unlikely(!p))
3906                         goto out_overflow;
3907                 len = be32_to_cpup(p);
3908                 p = xdr_inline_decode(xdr, len);
3909                 if (unlikely(!p))
3910                         goto out_overflow;
3911                 if (owner_name != NULL) {
3912                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3913                         if (owner_name->data != NULL) {
3914                                 owner_name->len = len;
3915                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3916                         }
3917                 } else if (len < XDR_MAX_NETOBJ) {
3918                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3919                                 ret = NFS_ATTR_FATTR_OWNER;
3920                         else
3921                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3922                                                 __func__);
3923                 } else
3924                         dprintk("%s: name too long (%u)!\n",
3925                                         __func__, len);
3926                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3927         }
3928         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3929         return ret;
3930 out_overflow:
3931         print_overflow_msg(__func__, xdr);
3932         return -EIO;
3933 }
3934
3935 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3936                 const struct nfs_server *server, kgid_t *gid,
3937                 struct nfs4_string *group_name)
3938 {
3939         uint32_t len;
3940         __be32 *p;
3941         int ret = 0;
3942
3943         *gid = make_kgid(&init_user_ns, -2);
3944         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3945                 return -EIO;
3946         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3947                 p = xdr_inline_decode(xdr, 4);
3948                 if (unlikely(!p))
3949                         goto out_overflow;
3950                 len = be32_to_cpup(p);
3951                 p = xdr_inline_decode(xdr, len);
3952                 if (unlikely(!p))
3953                         goto out_overflow;
3954                 if (group_name != NULL) {
3955                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3956                         if (group_name->data != NULL) {
3957                                 group_name->len = len;
3958                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3959                         }
3960                 } else if (len < XDR_MAX_NETOBJ) {
3961                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3962                                 ret = NFS_ATTR_FATTR_GROUP;
3963                         else
3964                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3965                                                 __func__);
3966                 } else
3967                         dprintk("%s: name too long (%u)!\n",
3968                                         __func__, len);
3969                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3970         }
3971         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3972         return ret;
3973 out_overflow:
3974         print_overflow_msg(__func__, xdr);
3975         return -EIO;
3976 }
3977
3978 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3979 {
3980         uint32_t major = 0, minor = 0;
3981         __be32 *p;
3982         int ret = 0;
3983
3984         *rdev = MKDEV(0,0);
3985         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3986                 return -EIO;
3987         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3988                 dev_t tmp;
3989
3990                 p = xdr_inline_decode(xdr, 8);
3991                 if (unlikely(!p))
3992                         goto out_overflow;
3993                 major = be32_to_cpup(p++);
3994                 minor = be32_to_cpup(p);
3995                 tmp = MKDEV(major, minor);
3996                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3997                         *rdev = tmp;
3998                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3999                 ret = NFS_ATTR_FATTR_RDEV;
4000         }
4001         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4002         return ret;
4003 out_overflow:
4004         print_overflow_msg(__func__, xdr);
4005         return -EIO;
4006 }
4007
4008 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4009 {
4010         __be32 *p;
4011         int status = 0;
4012
4013         *res = 0;
4014         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4015                 return -EIO;
4016         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4017                 p = xdr_inline_decode(xdr, 8);
4018                 if (unlikely(!p))
4019                         goto out_overflow;
4020                 xdr_decode_hyper(p, res);
4021                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4022         }
4023         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4024         return status;
4025 out_overflow:
4026         print_overflow_msg(__func__, xdr);
4027         return -EIO;
4028 }
4029
4030 static int decode_attr_space_free(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_FREE - 1U)))
4037                 return -EIO;
4038         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
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_FREE;
4044         }
4045         dprintk("%s: space free=%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_total(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_TOTAL - 1U)))
4059                 return -EIO;
4060         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
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_TOTAL;
4066         }
4067         dprintk("%s: space total=%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_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4075 {
4076         __be32 *p;
4077         int ret = 0;
4078
4079         *used = 0;
4080         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4081                 return -EIO;
4082         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4083                 p = xdr_inline_decode(xdr, 8);
4084                 if (unlikely(!p))
4085                         goto out_overflow;
4086                 xdr_decode_hyper(p, used);
4087                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4088                 ret = NFS_ATTR_FATTR_SPACE_USED;
4089         }
4090         dprintk("%s: space used=%Lu\n", __func__,
4091                         (unsigned long long)*used);
4092         return ret;
4093 out_overflow:
4094         print_overflow_msg(__func__, xdr);
4095         return -EIO;
4096 }
4097
4098 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4099 {
4100         __be32 *p;
4101         uint64_t sec;
4102         uint32_t nsec;
4103
4104         p = xdr_inline_decode(xdr, 12);
4105         if (unlikely(!p))
4106                 goto out_overflow;
4107         p = xdr_decode_hyper(p, &sec);
4108         nsec = be32_to_cpup(p);
4109         time->tv_sec = (time_t)sec;
4110         time->tv_nsec = (long)nsec;
4111         return 0;
4112 out_overflow:
4113         print_overflow_msg(__func__, xdr);
4114         return -EIO;
4115 }
4116
4117 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4118 {
4119         int status = 0;
4120
4121         time->tv_sec = 0;
4122         time->tv_nsec = 0;
4123         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4124                 return -EIO;
4125         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4126                 status = decode_attr_time(xdr, time);
4127                 if (status == 0)
4128                         status = NFS_ATTR_FATTR_ATIME;
4129                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4130         }
4131         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4132         return status;
4133 }
4134
4135 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4136 {
4137         int status = 0;
4138
4139         time->tv_sec = 0;
4140         time->tv_nsec = 0;
4141         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4142                 return -EIO;
4143         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4144                 status = decode_attr_time(xdr, time);
4145                 if (status == 0)
4146                         status = NFS_ATTR_FATTR_CTIME;
4147                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4148         }
4149         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4150         return status;
4151 }
4152
4153 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4154                                   struct timespec *time)
4155 {
4156         int status = 0;
4157
4158         time->tv_sec = 0;
4159         time->tv_nsec = 0;
4160         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4161                 return -EIO;
4162         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4163                 status = decode_attr_time(xdr, time);
4164                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4165         }
4166         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4167                 (long)time->tv_nsec);
4168         return status;
4169 }
4170
4171 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4172                                         struct nfs4_label *label)
4173 {
4174         uint32_t pi = 0;
4175         uint32_t lfs = 0;
4176         __u32 len;
4177         __be32 *p;
4178         int status = 0;
4179
4180         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4181                 return -EIO;
4182         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4183                 p = xdr_inline_decode(xdr, 4);
4184                 if (unlikely(!p))
4185                         goto out_overflow;
4186                 lfs = be32_to_cpup(p++);
4187                 p = xdr_inline_decode(xdr, 4);
4188                 if (unlikely(!p))
4189                         goto out_overflow;
4190                 pi = be32_to_cpup(p++);
4191                 p = xdr_inline_decode(xdr, 4);
4192                 if (unlikely(!p))
4193                         goto out_overflow;
4194                 len = be32_to_cpup(p++);
4195                 p = xdr_inline_decode(xdr, len);
4196                 if (unlikely(!p))
4197                         goto out_overflow;
4198                 if (len < NFS4_MAXLABELLEN) {
4199                         if (label) {
4200                                 memcpy(label->label, p, len);
4201                                 label->len = len;
4202                                 label->pi = pi;
4203                                 label->lfs = lfs;
4204                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4205                         }
4206                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4207                 } else
4208                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4209                                         __func__, len);
4210         }
4211         if (label && label->label)
4212                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4213                         (char *)label->label, label->len, label->pi, label->lfs);
4214         return status;
4215
4216 out_overflow:
4217         print_overflow_msg(__func__, xdr);
4218         return -EIO;
4219 }
4220
4221 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4222 {
4223         int status = 0;
4224
4225         time->tv_sec = 0;
4226         time->tv_nsec = 0;
4227         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4228                 return -EIO;
4229         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4230                 status = decode_attr_time(xdr, time);
4231                 if (status == 0)
4232                         status = NFS_ATTR_FATTR_MTIME;
4233                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4234         }
4235         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4236         return status;
4237 }
4238
4239 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4240 {
4241         unsigned int attrwords = XDR_QUADLEN(attrlen);
4242         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4243
4244         if (unlikely(attrwords != nwords)) {
4245                 dprintk("%s: server returned incorrect attribute length: "
4246                         "%u %c %u\n",
4247                                 __func__,
4248                                 attrwords << 2,
4249                                 (attrwords < nwords) ? '<' : '>',
4250                                 nwords << 2);
4251                 return -EIO;
4252         }
4253         return 0;
4254 }
4255
4256 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4257 {
4258         __be32 *p;
4259
4260         p = xdr_inline_decode(xdr, 20);
4261         if (unlikely(!p))
4262                 goto out_overflow;
4263         cinfo->atomic = be32_to_cpup(p++);
4264         p = xdr_decode_hyper(p, &cinfo->before);
4265         xdr_decode_hyper(p, &cinfo->after);
4266         return 0;
4267 out_overflow:
4268         print_overflow_msg(__func__, xdr);
4269         return -EIO;
4270 }
4271
4272 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4273 {
4274         __be32 *p;
4275         uint32_t supp, acc;
4276         int status;
4277
4278         status = decode_op_hdr(xdr, OP_ACCESS);
4279         if (status)
4280                 return status;
4281         p = xdr_inline_decode(xdr, 8);
4282         if (unlikely(!p))
4283                 goto out_overflow;
4284         supp = be32_to_cpup(p++);
4285         acc = be32_to_cpup(p);
4286         *supported = supp;
4287         *access = acc;
4288         return 0;
4289 out_overflow:
4290         print_overflow_msg(__func__, xdr);
4291         return -EIO;
4292 }
4293
4294 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4295 {
4296         __be32 *p;
4297
4298         p = xdr_inline_decode(xdr, len);
4299         if (likely(p)) {
4300                 memcpy(buf, p, len);
4301                 return 0;
4302         }
4303         print_overflow_msg(__func__, xdr);
4304         return -EIO;
4305 }
4306
4307 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4308 {
4309         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4310 }
4311
4312 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4313 {
4314         stateid->type = NFS4_OPEN_STATEID_TYPE;
4315         return decode_stateid(xdr, stateid);
4316 }
4317
4318 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4319 {
4320         stateid->type = NFS4_LOCK_STATEID_TYPE;
4321         return decode_stateid(xdr, stateid);
4322 }
4323
4324 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4325 {
4326         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4327         return decode_stateid(xdr, stateid);
4328 }
4329
4330 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4331 {
4332         int status;
4333
4334         status = decode_op_hdr(xdr, OP_CLOSE);
4335         if (status != -EIO)
4336                 nfs_increment_open_seqid(status, res->seqid);
4337         if (!status)
4338                 status = decode_open_stateid(xdr, &res->stateid);
4339         return status;
4340 }
4341
4342 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4343 {
4344         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4345 }
4346
4347 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4348 {
4349         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4350 }
4351
4352 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4353 {
4354         int status;
4355
4356         status = decode_op_hdr(xdr, OP_COMMIT);
4357         if (!status)
4358                 status = decode_write_verifier(xdr, &res->verf->verifier);
4359         return status;
4360 }
4361
4362 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4363 {
4364         __be32 *p;
4365         uint32_t bmlen;
4366         int status;
4367
4368         status = decode_op_hdr(xdr, OP_CREATE);
4369         if (status)
4370                 return status;
4371         if ((status = decode_change_info(xdr, cinfo)))
4372                 return status;
4373         p = xdr_inline_decode(xdr, 4);
4374         if (unlikely(!p))
4375                 goto out_overflow;
4376         bmlen = be32_to_cpup(p);
4377         p = xdr_inline_decode(xdr, bmlen << 2);
4378         if (likely(p))
4379                 return 0;
4380 out_overflow:
4381         print_overflow_msg(__func__, xdr);
4382         return -EIO;
4383 }
4384
4385 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4386 {
4387         unsigned int savep;
4388         uint32_t attrlen, bitmap[3] = {0};
4389         int status;
4390
4391         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4392                 goto xdr_error;
4393         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4394                 goto xdr_error;
4395         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4396                 goto xdr_error;
4397         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4398                 goto xdr_error;
4399         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4400                                                  &res->fh_expire_type)) != 0)
4401                 goto xdr_error;
4402         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4403                 goto xdr_error;
4404         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4405                 goto xdr_error;
4406         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4407                 goto xdr_error;
4408         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4409                                 res->exclcreat_bitmask)) != 0)
4410                 goto xdr_error;
4411         status = verify_attr_len(xdr, savep, attrlen);
4412 xdr_error:
4413         dprintk("%s: xdr returned %d!\n", __func__, -status);
4414         return status;
4415 }
4416
4417 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4418 {
4419         unsigned int savep;
4420         uint32_t attrlen, bitmap[3] = {0};
4421         int status;
4422
4423         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4424                 goto xdr_error;
4425         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4426                 goto xdr_error;
4427         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4428                 goto xdr_error;
4429
4430         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4431                 goto xdr_error;
4432         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4433                 goto xdr_error;
4434         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4435                 goto xdr_error;
4436
4437         status = -EIO;
4438         if (unlikely(bitmap[0]))
4439                 goto xdr_error;
4440
4441         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4442                 goto xdr_error;
4443         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4444                 goto xdr_error;
4445         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4446                 goto xdr_error;
4447
4448         status = verify_attr_len(xdr, savep, attrlen);
4449 xdr_error:
4450         dprintk("%s: xdr returned %d!\n", __func__, -status);
4451         return status;
4452 }
4453
4454 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4455 {
4456         unsigned int savep;
4457         uint32_t attrlen, bitmap[3] = {0};
4458         int status;
4459
4460         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4461                 goto xdr_error;
4462         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4463                 goto xdr_error;
4464         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4465                 goto xdr_error;
4466
4467         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4468                 goto xdr_error;
4469         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4470                 goto xdr_error;
4471
4472         status = verify_attr_len(xdr, savep, attrlen);
4473 xdr_error:
4474         dprintk("%s: xdr returned %d!\n", __func__, -status);
4475         return status;
4476 }
4477
4478 static int decode_threshold_hint(struct xdr_stream *xdr,
4479                                   uint32_t *bitmap,
4480                                   uint64_t *res,
4481                                   uint32_t hint_bit)
4482 {
4483         __be32 *p;
4484
4485         *res = 0;
4486         if (likely(bitmap[0] & hint_bit)) {
4487                 p = xdr_inline_decode(xdr, 8);
4488                 if (unlikely(!p))
4489                         goto out_overflow;
4490                 xdr_decode_hyper(p, res);
4491         }
4492         return 0;
4493 out_overflow:
4494         print_overflow_msg(__func__, xdr);
4495         return -EIO;
4496 }
4497
4498 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4499                                         struct nfs4_threshold *res)
4500 {
4501         __be32 *p;
4502         unsigned int savep;
4503         uint32_t bitmap[3] = {0,}, attrlen;
4504         int status;
4505
4506         /* layout type */
4507         p = xdr_inline_decode(xdr, 4);
4508         if (unlikely(!p)) {
4509                 print_overflow_msg(__func__, xdr);
4510                 return -EIO;
4511         }
4512         res->l_type = be32_to_cpup(p);
4513
4514         /* thi_hintset bitmap */
4515         status = decode_attr_bitmap(xdr, bitmap);
4516         if (status < 0)
4517                 goto xdr_error;
4518
4519         /* thi_hintlist length */
4520         status = decode_attr_length(xdr, &attrlen, &savep);
4521         if (status < 0)
4522                 goto xdr_error;
4523         /* thi_hintlist */
4524         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4525         if (status < 0)
4526                 goto xdr_error;
4527         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4528         if (status < 0)
4529                 goto xdr_error;
4530         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4531                                        THRESHOLD_RD_IO);
4532         if (status < 0)
4533                 goto xdr_error;
4534         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4535                                        THRESHOLD_WR_IO);
4536         if (status < 0)
4537                 goto xdr_error;
4538
4539         status = verify_attr_len(xdr, savep, attrlen);
4540         res->bm = bitmap[0];
4541
4542         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4543                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4544                 res->wr_io_sz);
4545 xdr_error:
4546         dprintk("%s ret=%d!\n", __func__, status);
4547         return status;
4548 }
4549
4550 /*
4551  * Thresholds on pNFS direct I/O vrs MDS I/O
4552  */
4553 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4554                                     uint32_t *bitmap,
4555                                     struct nfs4_threshold *res)
4556 {
4557         __be32 *p;
4558         int status = 0;
4559         uint32_t num;
4560
4561         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4562                 return -EIO;
4563         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4564                 /* Did the server return an unrequested attribute? */
4565                 if (unlikely(res == NULL))
4566                         return -EREMOTEIO;
4567                 p = xdr_inline_decode(xdr, 4);
4568                 if (unlikely(!p))
4569                         goto out_overflow;
4570                 num = be32_to_cpup(p);
4571                 if (num == 0)
4572                         return 0;
4573                 if (num > 1)
4574                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4575                                 "drivers per filesystem not supported\n",
4576                                 __func__);
4577
4578                 status = decode_first_threshold_item4(xdr, res);
4579                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4580         }
4581         return status;
4582 out_overflow:
4583         print_overflow_msg(__func__, xdr);
4584         return -EIO;
4585 }
4586
4587 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4588                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4589                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4590                 const struct nfs_server *server)
4591 {
4592         int status;
4593         umode_t fmode = 0;
4594         uint32_t type;
4595         int32_t err;
4596
4597         status = decode_attr_type(xdr, bitmap, &type);
4598         if (status < 0)
4599                 goto xdr_error;
4600         fattr->mode = 0;
4601         if (status != 0) {
4602                 fattr->mode |= nfs_type2fmt[type];
4603                 fattr->valid |= status;
4604         }
4605
4606         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4607         if (status < 0)
4608                 goto xdr_error;
4609         fattr->valid |= status;
4610
4611         status = decode_attr_size(xdr, bitmap, &fattr->size);
4612         if (status < 0)
4613                 goto xdr_error;
4614         fattr->valid |= status;
4615
4616         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4617         if (status < 0)
4618                 goto xdr_error;
4619         fattr->valid |= status;
4620
4621         err = 0;
4622         status = decode_attr_error(xdr, bitmap, &err);
4623         if (status < 0)
4624                 goto xdr_error;
4625
4626         status = decode_attr_filehandle(xdr, bitmap, fh);
4627         if (status < 0)
4628                 goto xdr_error;
4629
4630         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4631         if (status < 0)
4632                 goto xdr_error;
4633         fattr->valid |= status;
4634
4635         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4636         if (status < 0)
4637                 goto xdr_error;
4638         fattr->valid |= status;
4639
4640         status = -EIO;
4641         if (unlikely(bitmap[0]))
4642                 goto xdr_error;
4643
4644         status = decode_attr_mode(xdr, bitmap, &fmode);
4645         if (status < 0)
4646                 goto xdr_error;
4647         if (status != 0) {
4648                 fattr->mode |= fmode;
4649                 fattr->valid |= status;
4650         }
4651
4652         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4653         if (status < 0)
4654                 goto xdr_error;
4655         fattr->valid |= status;
4656
4657         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4658         if (status < 0)
4659                 goto xdr_error;
4660         fattr->valid |= status;
4661
4662         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4663         if (status < 0)
4664                 goto xdr_error;
4665         fattr->valid |= status;
4666
4667         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4668         if (status < 0)
4669                 goto xdr_error;
4670         fattr->valid |= status;
4671
4672         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4673         if (status < 0)
4674                 goto xdr_error;
4675         fattr->valid |= status;
4676
4677         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4678         if (status < 0)
4679                 goto xdr_error;
4680         fattr->valid |= status;
4681
4682         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4683         if (status < 0)
4684                 goto xdr_error;
4685         fattr->valid |= status;
4686
4687         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4688         if (status < 0)
4689                 goto xdr_error;
4690         fattr->valid |= status;
4691
4692         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4693         if (status < 0)
4694                 goto xdr_error;
4695         fattr->valid |= status;
4696
4697         status = -EIO;
4698         if (unlikely(bitmap[1]))
4699                 goto xdr_error;
4700
4701         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4702         if (status < 0)
4703                 goto xdr_error;
4704
4705         if (label) {
4706                 status = decode_attr_security_label(xdr, bitmap, label);
4707                 if (status < 0)
4708                         goto xdr_error;
4709                 fattr->valid |= status;
4710         }
4711
4712 xdr_error:
4713         dprintk("%s: xdr returned %d\n", __func__, -status);
4714         return status;
4715 }
4716
4717 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4718                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4719                 struct nfs4_label *label, const struct nfs_server *server)
4720 {
4721         unsigned int savep;
4722         uint32_t attrlen,
4723                  bitmap[3] = {0};
4724         int status;
4725
4726         status = decode_op_hdr(xdr, OP_GETATTR);
4727         if (status < 0)
4728                 goto xdr_error;
4729
4730         status = decode_attr_bitmap(xdr, bitmap);
4731         if (status < 0)
4732                 goto xdr_error;
4733
4734         status = decode_attr_length(xdr, &attrlen, &savep);
4735         if (status < 0)
4736                 goto xdr_error;
4737
4738         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4739                                         label, server);
4740         if (status < 0)
4741                 goto xdr_error;
4742
4743         status = verify_attr_len(xdr, savep, attrlen);
4744 xdr_error:
4745         dprintk("%s: xdr returned %d\n", __func__, -status);
4746         return status;
4747 }
4748
4749 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4750                 struct nfs4_label *label, const struct nfs_server *server)
4751 {
4752         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4753 }
4754
4755 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4756                 const struct nfs_server *server)
4757 {
4758         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4759 }
4760
4761 /*
4762  * Decode potentially multiple layout types.
4763  */
4764 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4765                                     struct nfs_fsinfo *fsinfo)
4766 {
4767         __be32 *p;
4768         uint32_t i;
4769
4770         p = xdr_inline_decode(xdr, 4);
4771         if (unlikely(!p))
4772                 goto out_overflow;
4773         fsinfo->nlayouttypes = be32_to_cpup(p);
4774
4775         /* pNFS is not supported by the underlying file system */
4776         if (fsinfo->nlayouttypes == 0)
4777                 return 0;
4778
4779         /* Decode and set first layout type, move xdr->p past unused types */
4780         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4781         if (unlikely(!p))
4782                 goto out_overflow;
4783
4784         /* If we get too many, then just cap it at the max */
4785         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4786                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4787                         __func__, fsinfo->nlayouttypes);
4788                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4789         }
4790
4791         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4792                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4793         return 0;
4794 out_overflow:
4795         print_overflow_msg(__func__, xdr);
4796         return -EIO;
4797 }
4798
4799 /*
4800  * The type of file system exported.
4801  * Note we must ensure that layouttype is set in any non-error case.
4802  */
4803 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4804                                 struct nfs_fsinfo *fsinfo)
4805 {
4806         int status = 0;
4807
4808         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4809         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4810                 return -EIO;
4811         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4812                 status = decode_pnfs_layout_types(xdr, fsinfo);
4813                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4814         }
4815         return status;
4816 }
4817
4818 /*
4819  * The prefered block size for layout directed io
4820  */
4821 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4822                                       uint32_t *res)
4823 {
4824         __be32 *p;
4825
4826         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4827         *res = 0;
4828         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4829                 p = xdr_inline_decode(xdr, 4);
4830                 if (unlikely(!p)) {
4831                         print_overflow_msg(__func__, xdr);
4832                         return -EIO;
4833                 }
4834                 *res = be32_to_cpup(p);
4835                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4836         }
4837         return 0;
4838 }
4839
4840 /*
4841  * The granularity of a CLONE operation.
4842  */
4843 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4844                                      uint32_t *res)
4845 {
4846         __be32 *p;
4847
4848         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4849         *res = 0;
4850         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4851                 p = xdr_inline_decode(xdr, 4);
4852                 if (unlikely(!p)) {
4853                         print_overflow_msg(__func__, xdr);
4854                         return -EIO;
4855                 }
4856                 *res = be32_to_cpup(p);
4857                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4858         }
4859         return 0;
4860 }
4861
4862 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4863 {
4864         unsigned int savep;
4865         uint32_t attrlen, bitmap[3];
4866         int status;
4867
4868         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4869                 goto xdr_error;
4870         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4871                 goto xdr_error;
4872         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4873                 goto xdr_error;
4874
4875         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4876
4877         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4878                 goto xdr_error;
4879         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4880                 goto xdr_error;
4881         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4882                 goto xdr_error;
4883         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4884         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4885                 goto xdr_error;
4886         fsinfo->wtpref = fsinfo->wtmax;
4887
4888         status = -EIO;
4889         if (unlikely(bitmap[0]))
4890                 goto xdr_error;
4891
4892         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4893         if (status != 0)
4894                 goto xdr_error;
4895         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4896         if (status != 0)
4897                 goto xdr_error;
4898
4899         status = -EIO;
4900         if (unlikely(bitmap[1]))
4901                 goto xdr_error;
4902
4903         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4904         if (status)
4905                 goto xdr_error;
4906         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4907         if (status)
4908                 goto xdr_error;
4909
4910         status = verify_attr_len(xdr, savep, attrlen);
4911 xdr_error:
4912         dprintk("%s: xdr returned %d!\n", __func__, -status);
4913         return status;
4914 }
4915
4916 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4917 {
4918         __be32 *p;
4919         uint32_t len;
4920         int status;
4921
4922         /* Zero handle first to allow comparisons */
4923         memset(fh, 0, sizeof(*fh));
4924
4925         status = decode_op_hdr(xdr, OP_GETFH);
4926         if (status)
4927                 return status;
4928
4929         p = xdr_inline_decode(xdr, 4);
4930         if (unlikely(!p))
4931                 goto out_overflow;
4932         len = be32_to_cpup(p);
4933         if (len > NFS4_FHSIZE)
4934                 return -EIO;
4935         fh->size = len;
4936         p = xdr_inline_decode(xdr, len);
4937         if (unlikely(!p))
4938                 goto out_overflow;
4939         memcpy(fh->data, p, len);
4940         return 0;
4941 out_overflow:
4942         print_overflow_msg(__func__, xdr);
4943         return -EIO;
4944 }
4945
4946 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4947 {
4948         int status;
4949
4950         status = decode_op_hdr(xdr, OP_LINK);
4951         if (status)
4952                 return status;
4953         return decode_change_info(xdr, cinfo);
4954 }
4955
4956 /*
4957  * We create the owner, so we know a proper owner.id length is 4.
4958  */
4959 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4960 {
4961         uint64_t offset, length, clientid;
4962         __be32 *p;
4963         uint32_t namelen, type;
4964
4965         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4966         if (unlikely(!p))
4967                 goto out_overflow;
4968         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4969         p = xdr_decode_hyper(p, &length);
4970         type = be32_to_cpup(p++); /* 4 byte read */
4971         if (fl != NULL) { /* manipulate file lock */
4972                 fl->fl_start = (loff_t)offset;
4973                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4974                 if (length == ~(uint64_t)0)
4975                         fl->fl_end = OFFSET_MAX;
4976                 fl->fl_type = F_WRLCK;
4977                 if (type & 1)
4978                         fl->fl_type = F_RDLCK;
4979                 fl->fl_pid = 0;
4980         }
4981         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4982         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4983         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4984         if (likely(p))
4985                 return -NFS4ERR_DENIED;
4986 out_overflow:
4987         print_overflow_msg(__func__, xdr);
4988         return -EIO;
4989 }
4990
4991 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4992 {
4993         int status;
4994
4995         status = decode_op_hdr(xdr, OP_LOCK);
4996         if (status == -EIO)
4997                 goto out;
4998         if (status == 0) {
4999                 status = decode_lock_stateid(xdr, &res->stateid);
5000                 if (unlikely(status))
5001                         goto out;
5002         } else if (status == -NFS4ERR_DENIED)
5003                 status = decode_lock_denied(xdr, NULL);
5004         if (res->open_seqid != NULL)
5005                 nfs_increment_open_seqid(status, res->open_seqid);
5006         nfs_increment_lock_seqid(status, res->lock_seqid);
5007 out:
5008         return status;
5009 }
5010
5011 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5012 {
5013         int status;
5014         status = decode_op_hdr(xdr, OP_LOCKT);
5015         if (status == -NFS4ERR_DENIED)
5016                 return decode_lock_denied(xdr, res->denied);
5017         return status;
5018 }
5019
5020 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5021 {
5022         int status;
5023
5024         status = decode_op_hdr(xdr, OP_LOCKU);
5025         if (status != -EIO)
5026                 nfs_increment_lock_seqid(status, res->seqid);
5027         if (status == 0)
5028                 status = decode_lock_stateid(xdr, &res->stateid);
5029         return status;
5030 }
5031
5032 static int decode_release_lockowner(struct xdr_stream *xdr)
5033 {
5034         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5035 }
5036
5037 static int decode_lookup(struct xdr_stream *xdr)
5038 {
5039         return decode_op_hdr(xdr, OP_LOOKUP);
5040 }
5041
5042 /* This is too sick! */
5043 static int decode_space_limit(struct xdr_stream *xdr,
5044                 unsigned long *pagemod_limit)
5045 {
5046         __be32 *p;
5047         uint32_t limit_type, nblocks, blocksize;
5048         u64 maxsize = 0;
5049
5050         p = xdr_inline_decode(xdr, 12);
5051         if (unlikely(!p))
5052                 goto out_overflow;
5053         limit_type = be32_to_cpup(p++);
5054         switch (limit_type) {
5055         case NFS4_LIMIT_SIZE:
5056                 xdr_decode_hyper(p, &maxsize);
5057                 break;
5058         case NFS4_LIMIT_BLOCKS:
5059                 nblocks = be32_to_cpup(p++);
5060                 blocksize = be32_to_cpup(p);
5061                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5062         }
5063         maxsize >>= PAGE_SHIFT;
5064         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5065         return 0;
5066 out_overflow:
5067         print_overflow_msg(__func__, xdr);
5068         return -EIO;
5069 }
5070
5071 static int decode_rw_delegation(struct xdr_stream *xdr,
5072                 uint32_t delegation_type,
5073                 struct nfs_openres *res)
5074 {
5075         __be32 *p;
5076         int status;
5077
5078         status = decode_delegation_stateid(xdr, &res->delegation);
5079         if (unlikely(status))
5080                 return status;
5081         p = xdr_inline_decode(xdr, 4);
5082         if (unlikely(!p))
5083                 goto out_overflow;
5084         res->do_recall = be32_to_cpup(p);
5085
5086         switch (delegation_type) {
5087         case NFS4_OPEN_DELEGATE_READ:
5088                 res->delegation_type = FMODE_READ;
5089                 break;
5090         case NFS4_OPEN_DELEGATE_WRITE:
5091                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5092                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5093                                 return -EIO;
5094         }
5095         return decode_ace(xdr, NULL, res->server->nfs_client);
5096 out_overflow:
5097         print_overflow_msg(__func__, xdr);
5098         return -EIO;
5099 }
5100
5101 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5102 {
5103         __be32 *p;
5104         uint32_t why_no_delegation;
5105
5106         p = xdr_inline_decode(xdr, 4);
5107         if (unlikely(!p))
5108                 goto out_overflow;
5109         why_no_delegation = be32_to_cpup(p);
5110         switch (why_no_delegation) {
5111                 case WND4_CONTENTION:
5112                 case WND4_RESOURCE:
5113                         xdr_inline_decode(xdr, 4);
5114                         /* Ignore for now */
5115         }
5116         return 0;
5117 out_overflow:
5118         print_overflow_msg(__func__, xdr);
5119         return -EIO;
5120 }
5121
5122 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5123 {
5124         __be32 *p;
5125         uint32_t delegation_type;
5126
5127         p = xdr_inline_decode(xdr, 4);
5128         if (unlikely(!p))
5129                 goto out_overflow;
5130         delegation_type = be32_to_cpup(p);
5131         res->delegation_type = 0;
5132         switch (delegation_type) {
5133         case NFS4_OPEN_DELEGATE_NONE:
5134                 return 0;
5135         case NFS4_OPEN_DELEGATE_READ:
5136         case NFS4_OPEN_DELEGATE_WRITE:
5137                 return decode_rw_delegation(xdr, delegation_type, res);
5138         case NFS4_OPEN_DELEGATE_NONE_EXT:
5139                 return decode_no_delegation(xdr, res);
5140         }
5141         return -EIO;
5142 out_overflow:
5143         print_overflow_msg(__func__, xdr);
5144         return -EIO;
5145 }
5146
5147 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5148 {
5149         __be32 *p;
5150         uint32_t savewords, bmlen, i;
5151         int status;
5152
5153         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5154                 return status;
5155         nfs_increment_open_seqid(status, res->seqid);
5156         if (status)
5157                 return status;
5158         status = decode_open_stateid(xdr, &res->stateid);
5159         if (unlikely(status))
5160                 return status;
5161
5162         decode_change_info(xdr, &res->cinfo);
5163
5164         p = xdr_inline_decode(xdr, 8);
5165         if (unlikely(!p))
5166                 goto out_overflow;
5167         res->rflags = be32_to_cpup(p++);
5168         bmlen = be32_to_cpup(p);
5169         if (bmlen > 10)
5170                 goto xdr_error;
5171
5172         p = xdr_inline_decode(xdr, bmlen << 2);
5173         if (unlikely(!p))
5174                 goto out_overflow;
5175         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5176         for (i = 0; i < savewords; ++i)
5177                 res->attrset[i] = be32_to_cpup(p++);
5178         for (; i < NFS4_BITMAP_SIZE; i++)
5179                 res->attrset[i] = 0;
5180
5181         return decode_delegation(xdr, res);
5182 xdr_error:
5183         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5184         return -EIO;
5185 out_overflow:
5186         print_overflow_msg(__func__, xdr);
5187         return -EIO;
5188 }
5189
5190 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5191 {
5192         int status;
5193
5194         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5195         if (status != -EIO)
5196                 nfs_increment_open_seqid(status, res->seqid);
5197         if (!status)
5198                 status = decode_open_stateid(xdr, &res->stateid);
5199         return status;
5200 }
5201
5202 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5203 {
5204         int status;
5205
5206         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5207         if (status != -EIO)
5208                 nfs_increment_open_seqid(status, res->seqid);
5209         if (!status)
5210                 status = decode_open_stateid(xdr, &res->stateid);
5211         return status;
5212 }
5213
5214 static int decode_putfh(struct xdr_stream *xdr)
5215 {
5216         return decode_op_hdr(xdr, OP_PUTFH);
5217 }
5218
5219 static int decode_putrootfh(struct xdr_stream *xdr)
5220 {
5221         return decode_op_hdr(xdr, OP_PUTROOTFH);
5222 }
5223
5224 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5225                        struct nfs_pgio_res *res)
5226 {
5227         __be32 *p;
5228         uint32_t count, eof, recvd;
5229         int status;
5230
5231         status = decode_op_hdr(xdr, OP_READ);
5232         if (status)
5233                 return status;
5234         p = xdr_inline_decode(xdr, 8);
5235         if (unlikely(!p))
5236                 goto out_overflow;
5237         eof = be32_to_cpup(p++);
5238         count = be32_to_cpup(p);
5239         recvd = xdr_read_pages(xdr, count);
5240         if (count > recvd) {
5241                 dprintk("NFS: server cheating in read reply: "
5242                                 "count %u > recvd %u\n", count, recvd);
5243                 count = recvd;
5244                 eof = 0;
5245         }
5246         res->eof = eof;
5247         res->count = count;
5248         return 0;
5249 out_overflow:
5250         print_overflow_msg(__func__, xdr);
5251         return -EIO;
5252 }
5253
5254 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5255 {
5256         int             status;
5257         __be32          verf[2];
5258
5259         status = decode_op_hdr(xdr, OP_READDIR);
5260         if (!status)
5261                 status = decode_verifier(xdr, readdir->verifier.data);
5262         if (unlikely(status))
5263                 return status;
5264         memcpy(verf, readdir->verifier.data, sizeof(verf));
5265         dprintk("%s: verifier = %08x:%08x\n",
5266                         __func__, verf[0], verf[1]);
5267         return xdr_read_pages(xdr, xdr->buf->page_len);
5268 }
5269
5270 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5271 {
5272         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5273         u32 len, recvd;
5274         __be32 *p;
5275         int status;
5276
5277         status = decode_op_hdr(xdr, OP_READLINK);
5278         if (status)
5279                 return status;
5280
5281         /* Convert length of symlink */
5282         p = xdr_inline_decode(xdr, 4);
5283         if (unlikely(!p))
5284                 goto out_overflow;
5285         len = be32_to_cpup(p);
5286         if (len >= rcvbuf->page_len || len <= 0) {
5287                 dprintk("nfs: server returned giant symlink!\n");
5288                 return -ENAMETOOLONG;
5289         }
5290         recvd = xdr_read_pages(xdr, len);
5291         if (recvd < len) {
5292                 dprintk("NFS: server cheating in readlink reply: "
5293                                 "count %u > recvd %u\n", len, recvd);
5294                 return -EIO;
5295         }
5296         /*
5297          * The XDR encode routine has set things up so that
5298          * the link text will be copied directly into the
5299          * buffer.  We just have to do overflow-checking,
5300          * and and null-terminate the text (the VFS expects
5301          * null-termination).
5302          */
5303         xdr_terminate_string(rcvbuf, len);
5304         return 0;
5305 out_overflow:
5306         print_overflow_msg(__func__, xdr);
5307         return -EIO;
5308 }
5309
5310 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5311 {
5312         int status;
5313
5314         status = decode_op_hdr(xdr, OP_REMOVE);
5315         if (status)
5316                 goto out;
5317         status = decode_change_info(xdr, cinfo);
5318 out:
5319         return status;
5320 }
5321
5322 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5323               struct nfs4_change_info *new_cinfo)
5324 {
5325         int status;
5326
5327         status = decode_op_hdr(xdr, OP_RENAME);
5328         if (status)
5329                 goto out;
5330         if ((status = decode_change_info(xdr, old_cinfo)))
5331                 goto out;
5332         status = decode_change_info(xdr, new_cinfo);
5333 out:
5334         return status;
5335 }
5336
5337 static int decode_renew(struct xdr_stream *xdr)
5338 {
5339         return decode_op_hdr(xdr, OP_RENEW);
5340 }
5341
5342 static int
5343 decode_restorefh(struct xdr_stream *xdr)
5344 {
5345         return decode_op_hdr(xdr, OP_RESTOREFH);
5346 }
5347
5348 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5349                          struct nfs_getaclres *res)
5350 {
5351         unsigned int savep;
5352         uint32_t attrlen,
5353                  bitmap[3] = {0};
5354         int status;
5355         unsigned int pg_offset;
5356
5357         res->acl_len = 0;
5358         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5359                 goto out;
5360
5361         xdr_enter_page(xdr, xdr->buf->page_len);
5362
5363         /* Calculate the offset of the page data */
5364         pg_offset = xdr->buf->head[0].iov_len;
5365
5366         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5367                 goto out;
5368         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5369                 goto out;
5370
5371         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5372                 return -EIO;
5373         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5374
5375                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5376                  * are stored with the acl data to handle the problem of
5377                  * variable length bitmaps.*/
5378                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5379                 res->acl_len = attrlen;
5380
5381                 /* Check for receive buffer overflow */
5382                 if (res->acl_len > (xdr->nwords << 2) ||
5383                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5384                         res->acl_flags |= NFS4_ACL_TRUNC;
5385                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5386                                         attrlen, xdr->nwords << 2);
5387                 }
5388         } else
5389                 status = -EOPNOTSUPP;
5390
5391 out:
5392         return status;
5393 }
5394
5395 static int
5396 decode_savefh(struct xdr_stream *xdr)
5397 {
5398         return decode_op_hdr(xdr, OP_SAVEFH);
5399 }
5400
5401 static int decode_setattr(struct xdr_stream *xdr)
5402 {
5403         __be32 *p;
5404         uint32_t bmlen;
5405         int status;
5406
5407         status = decode_op_hdr(xdr, OP_SETATTR);
5408         if (status)
5409                 return status;
5410         p = xdr_inline_decode(xdr, 4);
5411         if (unlikely(!p))
5412                 goto out_overflow;
5413         bmlen = be32_to_cpup(p);
5414         p = xdr_inline_decode(xdr, bmlen << 2);
5415         if (likely(p))
5416                 return 0;
5417 out_overflow:
5418         print_overflow_msg(__func__, xdr);
5419         return -EIO;
5420 }
5421
5422 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5423 {
5424         __be32 *p;
5425         uint32_t opnum;
5426         int32_t nfserr;
5427
5428         p = xdr_inline_decode(xdr, 8);
5429         if (unlikely(!p))
5430                 goto out_overflow;
5431         opnum = be32_to_cpup(p++);
5432         if (opnum != OP_SETCLIENTID) {
5433                 dprintk("nfs: decode_setclientid: Server returned operation"
5434                         " %d\n", opnum);
5435                 return -EIO;
5436         }
5437         nfserr = be32_to_cpup(p);
5438         if (nfserr == NFS_OK) {
5439                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5440                 if (unlikely(!p))
5441                         goto out_overflow;
5442                 p = xdr_decode_hyper(p, &res->clientid);
5443                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5444         } else if (nfserr == NFSERR_CLID_INUSE) {
5445                 uint32_t len;
5446
5447                 /* skip netid string */
5448                 p = xdr_inline_decode(xdr, 4);
5449                 if (unlikely(!p))
5450                         goto out_overflow;
5451                 len = be32_to_cpup(p);
5452                 p = xdr_inline_decode(xdr, len);
5453                 if (unlikely(!p))
5454                         goto out_overflow;
5455
5456                 /* skip uaddr string */
5457                 p = xdr_inline_decode(xdr, 4);
5458                 if (unlikely(!p))
5459                         goto out_overflow;
5460                 len = be32_to_cpup(p);
5461                 p = xdr_inline_decode(xdr, len);
5462                 if (unlikely(!p))
5463                         goto out_overflow;
5464                 return -NFSERR_CLID_INUSE;
5465         } else
5466                 return nfs4_stat_to_errno(nfserr);
5467
5468         return 0;
5469 out_overflow:
5470         print_overflow_msg(__func__, xdr);
5471         return -EIO;
5472 }
5473
5474 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5475 {
5476         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5477 }
5478
5479 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5480 {
5481         __be32 *p;
5482         int status;
5483
5484         status = decode_op_hdr(xdr, OP_WRITE);
5485         if (status)
5486                 return status;
5487
5488         p = xdr_inline_decode(xdr, 8);
5489         if (unlikely(!p))
5490                 goto out_overflow;
5491         res->count = be32_to_cpup(p++);
5492         res->verf->committed = be32_to_cpup(p++);
5493         return decode_write_verifier(xdr, &res->verf->verifier);
5494 out_overflow:
5495         print_overflow_msg(__func__, xdr);
5496         return -EIO;
5497 }
5498
5499 static int decode_delegreturn(struct xdr_stream *xdr)
5500 {
5501         return decode_op_hdr(xdr, OP_DELEGRETURN);
5502 }
5503
5504 static int decode_secinfo_gss(struct xdr_stream *xdr,
5505                               struct nfs4_secinfo4 *flavor)
5506 {
5507         u32 oid_len;
5508         __be32 *p;
5509
5510         p = xdr_inline_decode(xdr, 4);
5511         if (unlikely(!p))
5512                 goto out_overflow;
5513         oid_len = be32_to_cpup(p);
5514         if (oid_len > GSS_OID_MAX_LEN)
5515                 goto out_err;
5516
5517         p = xdr_inline_decode(xdr, oid_len);
5518         if (unlikely(!p))
5519                 goto out_overflow;
5520         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5521         flavor->flavor_info.oid.len = oid_len;
5522
5523         p = xdr_inline_decode(xdr, 8);
5524         if (unlikely(!p))
5525                 goto out_overflow;
5526         flavor->flavor_info.qop = be32_to_cpup(p++);
5527         flavor->flavor_info.service = be32_to_cpup(p);
5528
5529         return 0;
5530
5531 out_overflow:
5532         print_overflow_msg(__func__, xdr);
5533         return -EIO;
5534 out_err:
5535         return -EINVAL;
5536 }
5537
5538 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5539 {
5540         struct nfs4_secinfo4 *sec_flavor;
5541         unsigned int i, num_flavors;
5542         int status;
5543         __be32 *p;
5544
5545         p = xdr_inline_decode(xdr, 4);
5546         if (unlikely(!p))
5547                 goto out_overflow;
5548
5549         res->flavors->num_flavors = 0;
5550         num_flavors = be32_to_cpup(p);
5551
5552         for (i = 0; i < num_flavors; i++) {
5553                 sec_flavor = &res->flavors->flavors[i];
5554                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5555                         break;
5556
5557                 p = xdr_inline_decode(xdr, 4);
5558                 if (unlikely(!p))
5559                         goto out_overflow;
5560                 sec_flavor->flavor = be32_to_cpup(p);
5561
5562                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5563                         status = decode_secinfo_gss(xdr, sec_flavor);
5564                         if (status)
5565                                 goto out;
5566                 }
5567                 res->flavors->num_flavors++;
5568         }
5569
5570         status = 0;
5571 out:
5572         return status;
5573 out_overflow:
5574         print_overflow_msg(__func__, xdr);
5575         return -EIO;
5576 }
5577
5578 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5579 {
5580         int status = decode_op_hdr(xdr, OP_SECINFO);
5581         if (status)
5582                 return status;
5583         return decode_secinfo_common(xdr, res);
5584 }
5585
5586 #if defined(CONFIG_NFS_V4_1)
5587 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5588 {
5589         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5590         if (status)
5591                 return status;
5592         return decode_secinfo_common(xdr, res);
5593 }
5594
5595 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5596 {
5597         __be32 *p;
5598         uint32_t bitmap_words;
5599         unsigned int i;
5600
5601         p = xdr_inline_decode(xdr, 4);
5602         bitmap_words = be32_to_cpup(p++);
5603         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5604                 return -EIO;
5605         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5606         for (i = 0; i < bitmap_words; i++)
5607                 op_map->u.words[i] = be32_to_cpup(p++);
5608
5609         return 0;
5610 }
5611
5612 static int decode_exchange_id(struct xdr_stream *xdr,
5613                               struct nfs41_exchange_id_res *res)
5614 {
5615         __be32 *p;
5616         uint32_t dummy;
5617         char *dummy_str;
5618         int status;
5619         uint32_t impl_id_count;
5620
5621         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5622         if (status)
5623                 return status;
5624
5625         p = xdr_inline_decode(xdr, 8);
5626         if (unlikely(!p))
5627                 goto out_overflow;
5628         xdr_decode_hyper(p, &res->clientid);
5629         p = xdr_inline_decode(xdr, 12);
5630         if (unlikely(!p))
5631                 goto out_overflow;
5632         res->seqid = be32_to_cpup(p++);
5633         res->flags = be32_to_cpup(p++);
5634
5635         res->state_protect.how = be32_to_cpup(p);
5636         switch (res->state_protect.how) {
5637         case SP4_NONE:
5638                 break;
5639         case SP4_MACH_CRED:
5640                 status = decode_op_map(xdr, &res->state_protect.enforce);
5641                 if (status)
5642                         return status;
5643                 status = decode_op_map(xdr, &res->state_protect.allow);
5644                 if (status)
5645                         return status;
5646                 break;
5647         default:
5648                 WARN_ON_ONCE(1);
5649                 return -EIO;
5650         }
5651
5652         /* server_owner4.so_minor_id */
5653         p = xdr_inline_decode(xdr, 8);
5654         if (unlikely(!p))
5655                 goto out_overflow;
5656         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5657
5658         /* server_owner4.so_major_id */
5659         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5660         if (unlikely(status))
5661                 return status;
5662         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5663                 return -EIO;
5664         memcpy(res->server_owner->major_id, dummy_str, dummy);
5665         res->server_owner->major_id_sz = dummy;
5666
5667         /* server_scope4 */
5668         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5669         if (unlikely(status))
5670                 return status;
5671         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5672                 return -EIO;
5673         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5674         res->server_scope->server_scope_sz = dummy;
5675
5676         /* Implementation Id */
5677         p = xdr_inline_decode(xdr, 4);
5678         if (unlikely(!p))
5679                 goto out_overflow;
5680         impl_id_count = be32_to_cpup(p++);
5681
5682         if (impl_id_count) {
5683                 /* nii_domain */
5684                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5685                 if (unlikely(status))
5686                         return status;
5687                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5688                         return -EIO;
5689                 memcpy(res->impl_id->domain, dummy_str, dummy);
5690
5691                 /* nii_name */
5692                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5693                 if (unlikely(status))
5694                         return status;
5695                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5696                         return -EIO;
5697                 memcpy(res->impl_id->name, dummy_str, dummy);
5698
5699                 /* nii_date */
5700                 p = xdr_inline_decode(xdr, 12);
5701                 if (unlikely(!p))
5702                         goto out_overflow;
5703                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5704                 res->impl_id->date.nseconds = be32_to_cpup(p);
5705
5706                 /* if there's more than one entry, ignore the rest */
5707         }
5708         return 0;
5709 out_overflow:
5710         print_overflow_msg(__func__, xdr);
5711         return -EIO;
5712 }
5713
5714 static int decode_chan_attrs(struct xdr_stream *xdr,
5715                              struct nfs4_channel_attrs *attrs)
5716 {
5717         __be32 *p;
5718         u32 nr_attrs, val;
5719
5720         p = xdr_inline_decode(xdr, 28);
5721         if (unlikely(!p))
5722                 goto out_overflow;
5723         val = be32_to_cpup(p++);        /* headerpadsz */
5724         if (val)
5725                 return -EINVAL;         /* no support for header padding yet */
5726         attrs->max_rqst_sz = be32_to_cpup(p++);
5727         attrs->max_resp_sz = be32_to_cpup(p++);
5728         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5729         attrs->max_ops = be32_to_cpup(p++);
5730         attrs->max_reqs = be32_to_cpup(p++);
5731         nr_attrs = be32_to_cpup(p);
5732         if (unlikely(nr_attrs > 1)) {
5733                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5734                         "count %u\n", __func__, nr_attrs);
5735                 return -EINVAL;
5736         }
5737         if (nr_attrs == 1) {
5738                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5739                 if (unlikely(!p))
5740                         goto out_overflow;
5741         }
5742         return 0;
5743 out_overflow:
5744         print_overflow_msg(__func__, xdr);
5745         return -EIO;
5746 }
5747
5748 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5749 {
5750         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5751 }
5752
5753 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5754                                 struct nfs41_bind_conn_to_session_res *res)
5755 {
5756         __be32 *p;
5757         int status;
5758
5759         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5760         if (!status)
5761                 status = decode_sessionid(xdr, &res->sessionid);
5762         if (unlikely(status))
5763                 return status;
5764
5765         /* dir flags, rdma mode bool */
5766         p = xdr_inline_decode(xdr, 8);
5767         if (unlikely(!p))
5768                 goto out_overflow;
5769
5770         res->dir = be32_to_cpup(p++);
5771         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5772                 return -EIO;
5773         if (be32_to_cpup(p) == 0)
5774                 res->use_conn_in_rdma_mode = false;
5775         else
5776                 res->use_conn_in_rdma_mode = true;
5777
5778         return 0;
5779 out_overflow:
5780         print_overflow_msg(__func__, xdr);
5781         return -EIO;
5782 }
5783
5784 static int decode_create_session(struct xdr_stream *xdr,
5785                                  struct nfs41_create_session_res *res)
5786 {
5787         __be32 *p;
5788         int status;
5789
5790         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5791         if (!status)
5792                 status = decode_sessionid(xdr, &res->sessionid);
5793         if (unlikely(status))
5794                 return status;
5795
5796         /* seqid, flags */
5797         p = xdr_inline_decode(xdr, 8);
5798         if (unlikely(!p))
5799                 goto out_overflow;
5800         res->seqid = be32_to_cpup(p++);
5801         res->flags = be32_to_cpup(p);
5802
5803         /* Channel attributes */
5804         status = decode_chan_attrs(xdr, &res->fc_attrs);
5805         if (!status)
5806                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5807         return status;
5808 out_overflow:
5809         print_overflow_msg(__func__, xdr);
5810         return -EIO;
5811 }
5812
5813 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5814 {
5815         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5816 }
5817
5818 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5819 {
5820         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5821 }
5822
5823 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5824 {
5825         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5826 }
5827 #endif /* CONFIG_NFS_V4_1 */
5828
5829 static int decode_sequence(struct xdr_stream *xdr,
5830                            struct nfs4_sequence_res *res,
5831                            struct rpc_rqst *rqstp)
5832 {
5833 #if defined(CONFIG_NFS_V4_1)
5834         struct nfs4_session *session;
5835         struct nfs4_sessionid id;
5836         u32 dummy;
5837         int status;
5838         __be32 *p;
5839
5840         if (res->sr_slot == NULL)
5841                 return 0;
5842         if (!res->sr_slot->table->session)
5843                 return 0;
5844
5845         status = decode_op_hdr(xdr, OP_SEQUENCE);
5846         if (!status)
5847                 status = decode_sessionid(xdr, &id);
5848         if (unlikely(status))
5849                 goto out_err;
5850
5851         /*
5852          * If the server returns different values for sessionID, slotID or
5853          * sequence number, the server is looney tunes.
5854          */
5855         status = -EREMOTEIO;
5856         session = res->sr_slot->table->session;
5857
5858         if (memcmp(id.data, session->sess_id.data,
5859                    NFS4_MAX_SESSIONID_LEN)) {
5860                 dprintk("%s Invalid session id\n", __func__);
5861                 goto out_err;
5862         }
5863
5864         p = xdr_inline_decode(xdr, 20);
5865         if (unlikely(!p))
5866                 goto out_overflow;
5867
5868         /* seqid */
5869         dummy = be32_to_cpup(p++);
5870         if (dummy != res->sr_slot->seq_nr) {
5871                 dprintk("%s Invalid sequence number\n", __func__);
5872                 goto out_err;
5873         }
5874         /* slot id */
5875         dummy = be32_to_cpup(p++);
5876         if (dummy != res->sr_slot->slot_nr) {
5877                 dprintk("%s Invalid slot id\n", __func__);
5878                 goto out_err;
5879         }
5880         /* highest slot id */
5881         res->sr_highest_slotid = be32_to_cpup(p++);
5882         /* target highest slot id */
5883         res->sr_target_highest_slotid = be32_to_cpup(p++);
5884         /* result flags */
5885         res->sr_status_flags = be32_to_cpup(p);
5886         status = 0;
5887 out_err:
5888         res->sr_status = status;
5889         return status;
5890 out_overflow:
5891         print_overflow_msg(__func__, xdr);
5892         status = -EIO;
5893         goto out_err;
5894 #else  /* CONFIG_NFS_V4_1 */
5895         return 0;
5896 #endif /* CONFIG_NFS_V4_1 */
5897 }
5898
5899 #if defined(CONFIG_NFS_V4_1)
5900 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5901 {
5902         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5903         return decode_stateid(xdr, stateid);
5904 }
5905
5906 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5907                                 struct nfs4_getdeviceinfo_res *res)
5908 {
5909         struct pnfs_device *pdev = res->pdev;
5910         __be32 *p;
5911         uint32_t len, type;
5912         int status;
5913
5914         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5915         if (status) {
5916                 if (status == -ETOOSMALL) {
5917                         p = xdr_inline_decode(xdr, 4);
5918                         if (unlikely(!p))
5919                                 goto out_overflow;
5920                         pdev->mincount = be32_to_cpup(p);
5921                         dprintk("%s: Min count too small. mincnt = %u\n",
5922                                 __func__, pdev->mincount);
5923                 }
5924                 return status;
5925         }
5926
5927         p = xdr_inline_decode(xdr, 8);
5928         if (unlikely(!p))
5929                 goto out_overflow;
5930         type = be32_to_cpup(p++);
5931         if (type != pdev->layout_type) {
5932                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5933                         __func__, pdev->layout_type, type);
5934                 return -EINVAL;
5935         }
5936         /*
5937          * Get the length of the opaque device_addr4. xdr_read_pages places
5938          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5939          * and places the remaining xdr data in xdr_buf->tail
5940          */
5941         pdev->mincount = be32_to_cpup(p);
5942         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5943                 goto out_overflow;
5944
5945         /* Parse notification bitmap, verifying that it is zero. */
5946         p = xdr_inline_decode(xdr, 4);
5947         if (unlikely(!p))
5948                 goto out_overflow;
5949         len = be32_to_cpup(p);
5950         if (len) {
5951                 uint32_t i;
5952
5953                 p = xdr_inline_decode(xdr, 4 * len);
5954                 if (unlikely(!p))
5955                         goto out_overflow;
5956
5957                 res->notification = be32_to_cpup(p++);
5958                 for (i = 1; i < len; i++) {
5959                         if (be32_to_cpup(p++)) {
5960                                 dprintk("%s: unsupported notification\n",
5961                                         __func__);
5962                                 return -EIO;
5963                         }
5964                 }
5965         }
5966         return 0;
5967 out_overflow:
5968         print_overflow_msg(__func__, xdr);
5969         return -EIO;
5970 }
5971
5972 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5973                             struct nfs4_layoutget_res *res)
5974 {
5975         __be32 *p;
5976         int status;
5977         u32 layout_count;
5978         u32 recvd;
5979
5980         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5981         if (status)
5982                 return status;
5983         p = xdr_inline_decode(xdr, 4);
5984         if (unlikely(!p))
5985                 goto out_overflow;
5986         res->return_on_close = be32_to_cpup(p);
5987         decode_layout_stateid(xdr, &res->stateid);
5988         p = xdr_inline_decode(xdr, 4);
5989         if (unlikely(!p))
5990                 goto out_overflow;
5991         layout_count = be32_to_cpup(p);
5992         if (!layout_count) {
5993                 dprintk("%s: server responded with empty layout array\n",
5994                         __func__);
5995                 return -EINVAL;
5996         }
5997
5998         p = xdr_inline_decode(xdr, 28);
5999         if (unlikely(!p))
6000                 goto out_overflow;
6001         p = xdr_decode_hyper(p, &res->range.offset);
6002         p = xdr_decode_hyper(p, &res->range.length);
6003         res->range.iomode = be32_to_cpup(p++);
6004         res->type = be32_to_cpup(p++);
6005         res->layoutp->len = be32_to_cpup(p);
6006
6007         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6008                 __func__,
6009                 (unsigned long)res->range.offset,
6010                 (unsigned long)res->range.length,
6011                 res->range.iomode,
6012                 res->type,
6013                 res->layoutp->len);
6014
6015         recvd = xdr_read_pages(xdr, res->layoutp->len);
6016         if (res->layoutp->len > recvd) {
6017                 dprintk("NFS: server cheating in layoutget reply: "
6018                                 "layout len %u > recvd %u\n",
6019                                 res->layoutp->len, recvd);
6020                 return -EINVAL;
6021         }
6022
6023         if (layout_count > 1) {
6024                 /* We only handle a length one array at the moment.  Any
6025                  * further entries are just ignored.  Note that this means
6026                  * the client may see a response that is less than the
6027                  * minimum it requested.
6028                  */
6029                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6030                         __func__, layout_count);
6031         }
6032
6033         return 0;
6034 out_overflow:
6035         print_overflow_msg(__func__, xdr);
6036         return -EIO;
6037 }
6038
6039 static int decode_layoutreturn(struct xdr_stream *xdr,
6040                                struct nfs4_layoutreturn_res *res)
6041 {
6042         __be32 *p;
6043         int status;
6044
6045         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6046         if (status)
6047                 return status;
6048         p = xdr_inline_decode(xdr, 4);
6049         if (unlikely(!p))
6050                 goto out_overflow;
6051         res->lrs_present = be32_to_cpup(p);
6052         if (res->lrs_present)
6053                 status = decode_layout_stateid(xdr, &res->stateid);
6054         return status;
6055 out_overflow:
6056         print_overflow_msg(__func__, xdr);
6057         return -EIO;
6058 }
6059
6060 static int decode_layoutcommit(struct xdr_stream *xdr,
6061                                struct rpc_rqst *req,
6062                                struct nfs4_layoutcommit_res *res)
6063 {
6064         __be32 *p;
6065         __u32 sizechanged;
6066         int status;
6067
6068         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6069         res->status = status;
6070         if (status)
6071                 return status;
6072
6073         p = xdr_inline_decode(xdr, 4);
6074         if (unlikely(!p))
6075                 goto out_overflow;
6076         sizechanged = be32_to_cpup(p);
6077
6078         if (sizechanged) {
6079                 /* throw away new size */
6080                 p = xdr_inline_decode(xdr, 8);
6081                 if (unlikely(!p))
6082                         goto out_overflow;
6083         }
6084         return 0;
6085 out_overflow:
6086         print_overflow_msg(__func__, xdr);
6087         return -EIO;
6088 }
6089
6090 static int decode_test_stateid(struct xdr_stream *xdr,
6091                                struct nfs41_test_stateid_res *res)
6092 {
6093         __be32 *p;
6094         int status;
6095         int num_res;
6096
6097         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6098         if (status)
6099                 return status;
6100
6101         p = xdr_inline_decode(xdr, 4);
6102         if (unlikely(!p))
6103                 goto out_overflow;
6104         num_res = be32_to_cpup(p++);
6105         if (num_res != 1)
6106                 goto out;
6107
6108         p = xdr_inline_decode(xdr, 4);
6109         if (unlikely(!p))
6110                 goto out_overflow;
6111         res->status = be32_to_cpup(p++);
6112
6113         return status;
6114 out_overflow:
6115         print_overflow_msg(__func__, xdr);
6116 out:
6117         return -EIO;
6118 }
6119
6120 static int decode_free_stateid(struct xdr_stream *xdr,
6121                                struct nfs41_free_stateid_res *res)
6122 {
6123         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6124         return res->status;
6125 }
6126 #else
6127 static inline
6128 int decode_layoutreturn(struct xdr_stream *xdr,
6129                                struct nfs4_layoutreturn_res *res)
6130 {
6131         return 0;
6132 }
6133 #endif /* CONFIG_NFS_V4_1 */
6134
6135 /*
6136  * END OF "GENERIC" DECODE ROUTINES.
6137  */
6138
6139 /*
6140  * Decode OPEN_DOWNGRADE response
6141  */
6142 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6143                                        struct xdr_stream *xdr,
6144                                        struct nfs_closeres *res)
6145 {
6146         struct compound_hdr hdr;
6147         int status;
6148
6149         status = decode_compound_hdr(xdr, &hdr);
6150         if (status)
6151                 goto out;
6152         status = decode_sequence(xdr, &res->seq_res, rqstp);
6153         if (status)
6154                 goto out;
6155         status = decode_putfh(xdr);
6156         if (status)
6157                 goto out;
6158         if (res->lr_res) {
6159                 status = decode_layoutreturn(xdr, res->lr_res);
6160                 res->lr_ret = status;
6161                 if (status)
6162                         goto out;
6163         }
6164         status = decode_open_downgrade(xdr, res);
6165 out:
6166         return status;
6167 }
6168
6169 /*
6170  * Decode ACCESS response
6171  */
6172 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6173                                struct nfs4_accessres *res)
6174 {
6175         struct compound_hdr hdr;
6176         int status;
6177
6178         status = decode_compound_hdr(xdr, &hdr);
6179         if (status)
6180                 goto out;
6181         status = decode_sequence(xdr, &res->seq_res, rqstp);
6182         if (status)
6183                 goto out;
6184         status = decode_putfh(xdr);
6185         if (status != 0)
6186                 goto out;
6187         status = decode_access(xdr, &res->supported, &res->access);
6188         if (status != 0)
6189                 goto out;
6190         decode_getfattr(xdr, res->fattr, res->server);
6191 out:
6192         return status;
6193 }
6194
6195 /*
6196  * Decode LOOKUP response
6197  */
6198 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6199                                struct nfs4_lookup_res *res)
6200 {
6201         struct compound_hdr hdr;
6202         int status;
6203
6204         status = decode_compound_hdr(xdr, &hdr);
6205         if (status)
6206                 goto out;
6207         status = decode_sequence(xdr, &res->seq_res, rqstp);
6208         if (status)
6209                 goto out;
6210         status = decode_putfh(xdr);
6211         if (status)
6212                 goto out;
6213         status = decode_lookup(xdr);
6214         if (status)
6215                 goto out;
6216         status = decode_getfh(xdr, res->fh);
6217         if (status)
6218                 goto out;
6219         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6220 out:
6221         return status;
6222 }
6223
6224 /*
6225  * Decode LOOKUP_ROOT response
6226  */
6227 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6228                                     struct xdr_stream *xdr,
6229                                     struct nfs4_lookup_res *res)
6230 {
6231         struct compound_hdr hdr;
6232         int status;
6233
6234         status = decode_compound_hdr(xdr, &hdr);
6235         if (status)
6236                 goto out;
6237         status = decode_sequence(xdr, &res->seq_res, rqstp);
6238         if (status)
6239                 goto out;
6240         status = decode_putrootfh(xdr);
6241         if (status)
6242                 goto out;
6243         status = decode_getfh(xdr, res->fh);
6244         if (status == 0)
6245                 status = decode_getfattr_label(xdr, res->fattr,
6246                                                 res->label, res->server);
6247 out:
6248         return status;
6249 }
6250
6251 /*
6252  * Decode REMOVE response
6253  */
6254 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6255                                struct nfs_removeres *res)
6256 {
6257         struct compound_hdr hdr;
6258         int status;
6259
6260         status = decode_compound_hdr(xdr, &hdr);
6261         if (status)
6262                 goto out;
6263         status = decode_sequence(xdr, &res->seq_res, rqstp);
6264         if (status)
6265                 goto out;
6266         status = decode_putfh(xdr);
6267         if (status)
6268                 goto out;
6269         status = decode_remove(xdr, &res->cinfo);
6270 out:
6271         return status;
6272 }
6273
6274 /*
6275  * Decode RENAME response
6276  */
6277 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6278                                struct nfs_renameres *res)
6279 {
6280         struct compound_hdr hdr;
6281         int status;
6282
6283         status = decode_compound_hdr(xdr, &hdr);
6284         if (status)
6285                 goto out;
6286         status = decode_sequence(xdr, &res->seq_res, rqstp);
6287         if (status)
6288                 goto out;
6289         status = decode_putfh(xdr);
6290         if (status)
6291                 goto out;
6292         status = decode_savefh(xdr);
6293         if (status)
6294                 goto out;
6295         status = decode_putfh(xdr);
6296         if (status)
6297                 goto out;
6298         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6299 out:
6300         return status;
6301 }
6302
6303 /*
6304  * Decode LINK response
6305  */
6306 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6307                              struct nfs4_link_res *res)
6308 {
6309         struct compound_hdr hdr;
6310         int status;
6311
6312         status = decode_compound_hdr(xdr, &hdr);
6313         if (status)
6314                 goto out;
6315         status = decode_sequence(xdr, &res->seq_res, rqstp);
6316         if (status)
6317                 goto out;
6318         status = decode_putfh(xdr);
6319         if (status)
6320                 goto out;
6321         status = decode_savefh(xdr);
6322         if (status)
6323                 goto out;
6324         status = decode_putfh(xdr);
6325         if (status)
6326                 goto out;
6327         status = decode_link(xdr, &res->cinfo);
6328         if (status)
6329                 goto out;
6330         /*
6331          * Note order: OP_LINK leaves the directory as the current
6332          *             filehandle.
6333          */
6334         status = decode_restorefh(xdr);
6335         if (status)
6336                 goto out;
6337         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6338 out:
6339         return status;
6340 }
6341
6342 /*
6343  * Decode CREATE response
6344  */
6345 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6346                                struct nfs4_create_res *res)
6347 {
6348         struct compound_hdr hdr;
6349         int status;
6350
6351         status = decode_compound_hdr(xdr, &hdr);
6352         if (status)
6353                 goto out;
6354         status = decode_sequence(xdr, &res->seq_res, rqstp);
6355         if (status)
6356                 goto out;
6357         status = decode_putfh(xdr);
6358         if (status)
6359                 goto out;
6360         status = decode_create(xdr, &res->dir_cinfo);
6361         if (status)
6362                 goto out;
6363         status = decode_getfh(xdr, res->fh);
6364         if (status)
6365                 goto out;
6366         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6367 out:
6368         return status;
6369 }
6370
6371 /*
6372  * Decode SYMLINK response
6373  */
6374 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6375                                 struct nfs4_create_res *res)
6376 {
6377         return nfs4_xdr_dec_create(rqstp, xdr, res);
6378 }
6379
6380 /*
6381  * Decode GETATTR response
6382  */
6383 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6384                                 struct nfs4_getattr_res *res)
6385 {
6386         struct compound_hdr hdr;
6387         int status;
6388
6389         status = decode_compound_hdr(xdr, &hdr);
6390         if (status)
6391                 goto out;
6392         status = decode_sequence(xdr, &res->seq_res, rqstp);
6393         if (status)
6394                 goto out;
6395         status = decode_putfh(xdr);
6396         if (status)
6397                 goto out;
6398         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6399 out:
6400         return status;
6401 }
6402
6403 /*
6404  * Encode an SETACL request
6405  */
6406 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6407                                 struct nfs_setaclargs *args)
6408 {
6409         struct compound_hdr hdr = {
6410                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6411         };
6412
6413         encode_compound_hdr(xdr, req, &hdr);
6414         encode_sequence(xdr, &args->seq_args, &hdr);
6415         encode_putfh(xdr, args->fh, &hdr);
6416         encode_setacl(xdr, args, &hdr);
6417         encode_nops(&hdr);
6418 }
6419
6420 /*
6421  * Decode SETACL response
6422  */
6423 static int
6424 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6425                     struct nfs_setaclres *res)
6426 {
6427         struct compound_hdr hdr;
6428         int status;
6429
6430         status = decode_compound_hdr(xdr, &hdr);
6431         if (status)
6432                 goto out;
6433         status = decode_sequence(xdr, &res->seq_res, rqstp);
6434         if (status)
6435                 goto out;
6436         status = decode_putfh(xdr);
6437         if (status)
6438                 goto out;
6439         status = decode_setattr(xdr);
6440 out:
6441         return status;
6442 }
6443
6444 /*
6445  * Decode GETACL response
6446  */
6447 static int
6448 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6449                     struct nfs_getaclres *res)
6450 {
6451         struct compound_hdr hdr;
6452         int status;
6453
6454         if (res->acl_scratch != NULL) {
6455                 void *p = page_address(res->acl_scratch);
6456                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6457         }
6458         status = decode_compound_hdr(xdr, &hdr);
6459         if (status)
6460                 goto out;
6461         status = decode_sequence(xdr, &res->seq_res, rqstp);
6462         if (status)
6463                 goto out;
6464         status = decode_putfh(xdr);
6465         if (status)
6466                 goto out;
6467         status = decode_getacl(xdr, rqstp, res);
6468
6469 out:
6470         return status;
6471 }
6472
6473 /*
6474  * Decode CLOSE response
6475  */
6476 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6477                               struct nfs_closeres *res)
6478 {
6479         struct compound_hdr hdr;
6480         int status;
6481
6482         status = decode_compound_hdr(xdr, &hdr);
6483         if (status)
6484                 goto out;
6485         status = decode_sequence(xdr, &res->seq_res, rqstp);
6486         if (status)
6487                 goto out;
6488         status = decode_putfh(xdr);
6489         if (status)
6490                 goto out;
6491         if (res->lr_res) {
6492                 status = decode_layoutreturn(xdr, res->lr_res);
6493                 res->lr_ret = status;
6494                 if (status)
6495                         goto out;
6496         }
6497         if (res->fattr != NULL) {
6498                 status = decode_getfattr(xdr, res->fattr, res->server);
6499                 if (status != 0)
6500                         goto out;
6501         }
6502         status = decode_close(xdr, res);
6503 out:
6504         return status;
6505 }
6506
6507 /*
6508  * Decode OPEN response
6509  */
6510 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6511                              struct nfs_openres *res)
6512 {
6513         struct compound_hdr hdr;
6514         int status;
6515
6516         status = decode_compound_hdr(xdr, &hdr);
6517         if (status)
6518                 goto out;
6519         status = decode_sequence(xdr, &res->seq_res, rqstp);
6520         if (status)
6521                 goto out;
6522         status = decode_putfh(xdr);
6523         if (status)
6524                 goto out;
6525         status = decode_open(xdr, res);
6526         if (status)
6527                 goto out;
6528         status = decode_getfh(xdr, &res->fh);
6529         if (status)
6530                 goto out;
6531         if (res->access_request)
6532                 decode_access(xdr, &res->access_supported, &res->access_result);
6533         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6534 out:
6535         return status;
6536 }
6537
6538 /*
6539  * Decode OPEN_CONFIRM response
6540  */
6541 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6542                                      struct xdr_stream *xdr,
6543                                      struct nfs_open_confirmres *res)
6544 {
6545         struct compound_hdr hdr;
6546         int status;
6547
6548         status = decode_compound_hdr(xdr, &hdr);
6549         if (status)
6550                 goto out;
6551         status = decode_putfh(xdr);
6552         if (status)
6553                 goto out;
6554         status = decode_open_confirm(xdr, res);
6555 out:
6556         return status;
6557 }
6558
6559 /*
6560  * Decode OPEN response
6561  */
6562 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6563                                     struct xdr_stream *xdr,
6564                                     struct nfs_openres *res)
6565 {
6566         struct compound_hdr hdr;
6567         int status;
6568
6569         status = decode_compound_hdr(xdr, &hdr);
6570         if (status)
6571                 goto out;
6572         status = decode_sequence(xdr, &res->seq_res, rqstp);
6573         if (status)
6574                 goto out;
6575         status = decode_putfh(xdr);
6576         if (status)
6577                 goto out;
6578         status = decode_open(xdr, res);
6579         if (status)
6580                 goto out;
6581         if (res->access_request)
6582                 decode_access(xdr, &res->access_supported, &res->access_result);
6583         decode_getfattr(xdr, res->f_attr, res->server);
6584 out:
6585         return status;
6586 }
6587
6588 /*
6589  * Decode SETATTR response
6590  */
6591 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6592                                 struct xdr_stream *xdr,
6593                                 struct nfs_setattrres *res)
6594 {
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_setattr(xdr);
6608         if (status)
6609                 goto out;
6610         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6611 out:
6612         return status;
6613 }
6614
6615 /*
6616  * Decode LOCK response
6617  */
6618 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6619                              struct nfs_lock_res *res)
6620 {
6621         struct compound_hdr hdr;
6622         int status;
6623
6624         status = decode_compound_hdr(xdr, &hdr);
6625         if (status)
6626                 goto out;
6627         status = decode_sequence(xdr, &res->seq_res, rqstp);
6628         if (status)
6629                 goto out;
6630         status = decode_putfh(xdr);
6631         if (status)
6632                 goto out;
6633         status = decode_lock(xdr, res);
6634 out:
6635         return status;
6636 }
6637
6638 /*
6639  * Decode LOCKT response
6640  */
6641 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6642                               struct nfs_lockt_res *res)
6643 {
6644         struct compound_hdr hdr;
6645         int status;
6646
6647         status = decode_compound_hdr(xdr, &hdr);
6648         if (status)
6649                 goto out;
6650         status = decode_sequence(xdr, &res->seq_res, rqstp);
6651         if (status)
6652                 goto out;
6653         status = decode_putfh(xdr);
6654         if (status)
6655                 goto out;
6656         status = decode_lockt(xdr, res);
6657 out:
6658         return status;
6659 }
6660
6661 /*
6662  * Decode LOCKU response
6663  */
6664 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6665                               struct nfs_locku_res *res)
6666 {
6667         struct compound_hdr hdr;
6668         int status;
6669
6670         status = decode_compound_hdr(xdr, &hdr);
6671         if (status)
6672                 goto out;
6673         status = decode_sequence(xdr, &res->seq_res, rqstp);
6674         if (status)
6675                 goto out;
6676         status = decode_putfh(xdr);
6677         if (status)
6678                 goto out;
6679         status = decode_locku(xdr, res);
6680 out:
6681         return status;
6682 }
6683
6684 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6685                                           struct xdr_stream *xdr, void *dummy)
6686 {
6687         struct compound_hdr hdr;
6688         int status;
6689
6690         status = decode_compound_hdr(xdr, &hdr);
6691         if (!status)
6692                 status = decode_release_lockowner(xdr);
6693         return status;
6694 }
6695
6696 /*
6697  * Decode READLINK response
6698  */
6699 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6700                                  struct xdr_stream *xdr,
6701                                  struct nfs4_readlink_res *res)
6702 {
6703         struct compound_hdr hdr;
6704         int status;
6705
6706         status = decode_compound_hdr(xdr, &hdr);
6707         if (status)
6708                 goto out;
6709         status = decode_sequence(xdr, &res->seq_res, rqstp);
6710         if (status)
6711                 goto out;
6712         status = decode_putfh(xdr);
6713         if (status)
6714                 goto out;
6715         status = decode_readlink(xdr, rqstp);
6716 out:
6717         return status;
6718 }
6719
6720 /*
6721  * Decode READDIR response
6722  */
6723 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6724                                 struct nfs4_readdir_res *res)
6725 {
6726         struct compound_hdr hdr;
6727         int status;
6728
6729         status = decode_compound_hdr(xdr, &hdr);
6730         if (status)
6731                 goto out;
6732         status = decode_sequence(xdr, &res->seq_res, rqstp);
6733         if (status)
6734                 goto out;
6735         status = decode_putfh(xdr);
6736         if (status)
6737                 goto out;
6738         status = decode_readdir(xdr, rqstp, res);
6739 out:
6740         return status;
6741 }
6742
6743 /*
6744  * Decode Read response
6745  */
6746 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6747                              struct nfs_pgio_res *res)
6748 {
6749         struct compound_hdr hdr;
6750         int status;
6751
6752         status = decode_compound_hdr(xdr, &hdr);
6753         res->op_status = hdr.status;
6754         if (status)
6755                 goto out;
6756         status = decode_sequence(xdr, &res->seq_res, rqstp);
6757         if (status)
6758                 goto out;
6759         status = decode_putfh(xdr);
6760         if (status)
6761                 goto out;
6762         status = decode_read(xdr, rqstp, res);
6763         if (!status)
6764                 status = res->count;
6765 out:
6766         return status;
6767 }
6768
6769 /*
6770  * Decode WRITE response
6771  */
6772 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6773                               struct nfs_pgio_res *res)
6774 {
6775         struct compound_hdr hdr;
6776         int status;
6777
6778         status = decode_compound_hdr(xdr, &hdr);
6779         res->op_status = hdr.status;
6780         if (status)
6781                 goto out;
6782         status = decode_sequence(xdr, &res->seq_res, rqstp);
6783         if (status)
6784                 goto out;
6785         status = decode_putfh(xdr);
6786         if (status)
6787                 goto out;
6788         status = decode_write(xdr, res);
6789         if (status)
6790                 goto out;
6791         if (res->fattr)
6792                 decode_getfattr(xdr, res->fattr, res->server);
6793         if (!status)
6794                 status = res->count;
6795 out:
6796         return status;
6797 }
6798
6799 /*
6800  * Decode COMMIT response
6801  */
6802 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6803                                struct nfs_commitres *res)
6804 {
6805         struct compound_hdr hdr;
6806         int status;
6807
6808         status = decode_compound_hdr(xdr, &hdr);
6809         res->op_status = hdr.status;
6810         if (status)
6811                 goto out;
6812         status = decode_sequence(xdr, &res->seq_res, rqstp);
6813         if (status)
6814                 goto out;
6815         status = decode_putfh(xdr);
6816         if (status)
6817                 goto out;
6818         status = decode_commit(xdr, res);
6819 out:
6820         return status;
6821 }
6822
6823 /*
6824  * Decode FSINFO response
6825  */
6826 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6827                                struct nfs4_fsinfo_res *res)
6828 {
6829         struct compound_hdr hdr;
6830         int status;
6831
6832         status = decode_compound_hdr(xdr, &hdr);
6833         if (!status)
6834                 status = decode_sequence(xdr, &res->seq_res, req);
6835         if (!status)
6836                 status = decode_putfh(xdr);
6837         if (!status)
6838                 status = decode_fsinfo(xdr, res->fsinfo);
6839         return status;
6840 }
6841
6842 /*
6843  * Decode PATHCONF response
6844  */
6845 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6846                                  struct nfs4_pathconf_res *res)
6847 {
6848         struct compound_hdr hdr;
6849         int status;
6850
6851         status = decode_compound_hdr(xdr, &hdr);
6852         if (!status)
6853                 status = decode_sequence(xdr, &res->seq_res, req);
6854         if (!status)
6855                 status = decode_putfh(xdr);
6856         if (!status)
6857                 status = decode_pathconf(xdr, res->pathconf);
6858         return status;
6859 }
6860
6861 /*
6862  * Decode STATFS response
6863  */
6864 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6865                                struct nfs4_statfs_res *res)
6866 {
6867         struct compound_hdr hdr;
6868         int status;
6869
6870         status = decode_compound_hdr(xdr, &hdr);
6871         if (!status)
6872                 status = decode_sequence(xdr, &res->seq_res, req);
6873         if (!status)
6874                 status = decode_putfh(xdr);
6875         if (!status)
6876                 status = decode_statfs(xdr, res->fsstat);
6877         return status;
6878 }
6879
6880 /*
6881  * Decode GETATTR_BITMAP response
6882  */
6883 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6884                                     struct xdr_stream *xdr,
6885                                     struct nfs4_server_caps_res *res)
6886 {
6887         struct compound_hdr hdr;
6888         int status;
6889
6890         status = decode_compound_hdr(xdr, &hdr);
6891         if (status)
6892                 goto out;
6893         status = decode_sequence(xdr, &res->seq_res, req);
6894         if (status)
6895                 goto out;
6896         status = decode_putfh(xdr);
6897         if (status)
6898                 goto out;
6899         status = decode_server_caps(xdr, res);
6900 out:
6901         return status;
6902 }
6903
6904 /*
6905  * Decode RENEW response
6906  */
6907 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6908                               void *__unused)
6909 {
6910         struct compound_hdr hdr;
6911         int status;
6912
6913         status = decode_compound_hdr(xdr, &hdr);
6914         if (!status)
6915                 status = decode_renew(xdr);
6916         return status;
6917 }
6918
6919 /*
6920  * Decode SETCLIENTID response
6921  */
6922 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6923                                     struct xdr_stream *xdr,
6924                                     struct nfs4_setclientid_res *res)
6925 {
6926         struct compound_hdr hdr;
6927         int status;
6928
6929         status = decode_compound_hdr(xdr, &hdr);
6930         if (!status)
6931                 status = decode_setclientid(xdr, res);
6932         return status;
6933 }
6934
6935 /*
6936  * Decode SETCLIENTID_CONFIRM response
6937  */
6938 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6939                                             struct xdr_stream *xdr)
6940 {
6941         struct compound_hdr hdr;
6942         int status;
6943
6944         status = decode_compound_hdr(xdr, &hdr);
6945         if (!status)
6946                 status = decode_setclientid_confirm(xdr);
6947         return status;
6948 }
6949
6950 /*
6951  * Decode DELEGRETURN response
6952  */
6953 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6954                                     struct xdr_stream *xdr,
6955                                     struct nfs4_delegreturnres *res)
6956 {
6957         struct compound_hdr hdr;
6958         int status;
6959
6960         status = decode_compound_hdr(xdr, &hdr);
6961         if (status)
6962                 goto out;
6963         status = decode_sequence(xdr, &res->seq_res, rqstp);
6964         if (status)
6965                 goto out;
6966         status = decode_putfh(xdr);
6967         if (status != 0)
6968                 goto out;
6969         if (res->lr_res) {
6970                 status = decode_layoutreturn(xdr, res->lr_res);
6971                 res->lr_ret = status;
6972                 if (status)
6973                         goto out;
6974         }
6975         status = decode_getfattr(xdr, res->fattr, res->server);
6976         if (status != 0)
6977                 goto out;
6978         status = decode_delegreturn(xdr);
6979 out:
6980         return status;
6981 }
6982
6983 /*
6984  * Decode FS_LOCATIONS response
6985  */
6986 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6987                                      struct xdr_stream *xdr,
6988                                      struct nfs4_fs_locations_res *res)
6989 {
6990         struct compound_hdr hdr;
6991         int status;
6992
6993         status = decode_compound_hdr(xdr, &hdr);
6994         if (status)
6995                 goto out;
6996         status = decode_sequence(xdr, &res->seq_res, req);
6997         if (status)
6998                 goto out;
6999         status = decode_putfh(xdr);
7000         if (status)
7001                 goto out;
7002         if (res->migration) {
7003                 xdr_enter_page(xdr, PAGE_SIZE);
7004                 status = decode_getfattr_generic(xdr,
7005                                         &res->fs_locations->fattr,
7006                                          NULL, res->fs_locations,
7007                                          NULL, res->fs_locations->server);
7008                 if (status)
7009                         goto out;
7010                 if (res->renew)
7011                         status = decode_renew(xdr);
7012         } else {
7013                 status = decode_lookup(xdr);
7014                 if (status)
7015                         goto out;
7016                 xdr_enter_page(xdr, PAGE_SIZE);
7017                 status = decode_getfattr_generic(xdr,
7018                                         &res->fs_locations->fattr,
7019                                          NULL, res->fs_locations,
7020                                          NULL, res->fs_locations->server);
7021         }
7022 out:
7023         return status;
7024 }
7025
7026 /*
7027  * Decode SECINFO response
7028  */
7029 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7030                                 struct xdr_stream *xdr,
7031                                 struct nfs4_secinfo_res *res)
7032 {
7033         struct compound_hdr hdr;
7034         int status;
7035
7036         status = decode_compound_hdr(xdr, &hdr);
7037         if (status)
7038                 goto out;
7039         status = decode_sequence(xdr, &res->seq_res, rqstp);
7040         if (status)
7041                 goto out;
7042         status = decode_putfh(xdr);
7043         if (status)
7044                 goto out;
7045         status = decode_secinfo(xdr, res);
7046 out:
7047         return status;
7048 }
7049
7050 /*
7051  * Decode FSID_PRESENT response
7052  */
7053 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7054                                      struct xdr_stream *xdr,
7055                                      struct nfs4_fsid_present_res *res)
7056 {
7057         struct compound_hdr hdr;
7058         int status;
7059
7060         status = decode_compound_hdr(xdr, &hdr);
7061         if (status)
7062                 goto out;
7063         status = decode_sequence(xdr, &res->seq_res, rqstp);
7064         if (status)
7065                 goto out;
7066         status = decode_putfh(xdr);
7067         if (status)
7068                 goto out;
7069         status = decode_getfh(xdr, res->fh);
7070         if (status)
7071                 goto out;
7072         if (res->renew)
7073                 status = decode_renew(xdr);
7074 out:
7075         return status;
7076 }
7077
7078 #if defined(CONFIG_NFS_V4_1)
7079 /*
7080  * Decode BIND_CONN_TO_SESSION response
7081  */
7082 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7083                                         struct xdr_stream *xdr,
7084                                         void *res)
7085 {
7086         struct compound_hdr hdr;
7087         int status;
7088
7089         status = decode_compound_hdr(xdr, &hdr);
7090         if (!status)
7091                 status = decode_bind_conn_to_session(xdr, res);
7092         return status;
7093 }
7094
7095 /*
7096  * Decode EXCHANGE_ID response
7097  */
7098 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7099                                     struct xdr_stream *xdr,
7100                                     void *res)
7101 {
7102         struct compound_hdr hdr;
7103         int status;
7104
7105         status = decode_compound_hdr(xdr, &hdr);
7106         if (!status)
7107                 status = decode_exchange_id(xdr, res);
7108         return status;
7109 }
7110
7111 /*
7112  * Decode CREATE_SESSION response
7113  */
7114 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7115                                        struct xdr_stream *xdr,
7116                                        struct nfs41_create_session_res *res)
7117 {
7118         struct compound_hdr hdr;
7119         int status;
7120
7121         status = decode_compound_hdr(xdr, &hdr);
7122         if (!status)
7123                 status = decode_create_session(xdr, res);
7124         return status;
7125 }
7126
7127 /*
7128  * Decode DESTROY_SESSION response
7129  */
7130 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7131                                         struct xdr_stream *xdr,
7132                                         void *res)
7133 {
7134         struct compound_hdr hdr;
7135         int status;
7136
7137         status = decode_compound_hdr(xdr, &hdr);
7138         if (!status)
7139                 status = decode_destroy_session(xdr, res);
7140         return status;
7141 }
7142
7143 /*
7144  * Decode DESTROY_CLIENTID response
7145  */
7146 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7147                                         struct xdr_stream *xdr,
7148                                         void *res)
7149 {
7150         struct compound_hdr hdr;
7151         int status;
7152
7153         status = decode_compound_hdr(xdr, &hdr);
7154         if (!status)
7155                 status = decode_destroy_clientid(xdr, res);
7156         return status;
7157 }
7158
7159 /*
7160  * Decode SEQUENCE response
7161  */
7162 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7163                                  struct xdr_stream *xdr,
7164                                  struct nfs4_sequence_res *res)
7165 {
7166         struct compound_hdr hdr;
7167         int status;
7168
7169         status = decode_compound_hdr(xdr, &hdr);
7170         if (!status)
7171                 status = decode_sequence(xdr, res, rqstp);
7172         return status;
7173 }
7174
7175 /*
7176  * Decode GET_LEASE_TIME response
7177  */
7178 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7179                                        struct xdr_stream *xdr,
7180                                        struct nfs4_get_lease_time_res *res)
7181 {
7182         struct compound_hdr hdr;
7183         int status;
7184
7185         status = decode_compound_hdr(xdr, &hdr);
7186         if (!status)
7187                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7188         if (!status)
7189                 status = decode_putrootfh(xdr);
7190         if (!status)
7191                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7192         return status;
7193 }
7194
7195 /*
7196  * Decode RECLAIM_COMPLETE response
7197  */
7198 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7199                                          struct xdr_stream *xdr,
7200                                          struct nfs41_reclaim_complete_res *res)
7201 {
7202         struct compound_hdr hdr;
7203         int status;
7204
7205         status = decode_compound_hdr(xdr, &hdr);
7206         if (!status)
7207                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7208         if (!status)
7209                 status = decode_reclaim_complete(xdr, NULL);
7210         return status;
7211 }
7212
7213 /*
7214  * Decode GETDEVINFO response
7215  */
7216 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7217                                       struct xdr_stream *xdr,
7218                                       struct nfs4_getdeviceinfo_res *res)
7219 {
7220         struct compound_hdr hdr;
7221         int status;
7222
7223         status = decode_compound_hdr(xdr, &hdr);
7224         if (status != 0)
7225                 goto out;
7226         status = decode_sequence(xdr, &res->seq_res, rqstp);
7227         if (status != 0)
7228                 goto out;
7229         status = decode_getdeviceinfo(xdr, res);
7230 out:
7231         return status;
7232 }
7233
7234 /*
7235  * Decode LAYOUTGET response
7236  */
7237 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7238                                   struct xdr_stream *xdr,
7239                                   struct nfs4_layoutget_res *res)
7240 {
7241         struct compound_hdr hdr;
7242         int status;
7243
7244         status = decode_compound_hdr(xdr, &hdr);
7245         if (status)
7246                 goto out;
7247         status = decode_sequence(xdr, &res->seq_res, rqstp);
7248         if (status)
7249                 goto out;
7250         status = decode_putfh(xdr);
7251         if (status)
7252                 goto out;
7253         status = decode_layoutget(xdr, rqstp, res);
7254 out:
7255         return status;
7256 }
7257
7258 /*
7259  * Decode LAYOUTRETURN response
7260  */
7261 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7262                                      struct xdr_stream *xdr,
7263                                      struct nfs4_layoutreturn_res *res)
7264 {
7265         struct compound_hdr hdr;
7266         int status;
7267
7268         status = decode_compound_hdr(xdr, &hdr);
7269         if (status)
7270                 goto out;
7271         status = decode_sequence(xdr, &res->seq_res, rqstp);
7272         if (status)
7273                 goto out;
7274         status = decode_putfh(xdr);
7275         if (status)
7276                 goto out;
7277         status = decode_layoutreturn(xdr, res);
7278 out:
7279         return status;
7280 }
7281
7282 /*
7283  * Decode LAYOUTCOMMIT response
7284  */
7285 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7286                                      struct xdr_stream *xdr,
7287                                      struct nfs4_layoutcommit_res *res)
7288 {
7289         struct compound_hdr hdr;
7290         int status;
7291
7292         status = decode_compound_hdr(xdr, &hdr);
7293         if (status)
7294                 goto out;
7295         status = decode_sequence(xdr, &res->seq_res, rqstp);
7296         if (status)
7297                 goto out;
7298         status = decode_putfh(xdr);
7299         if (status)
7300                 goto out;
7301         status = decode_layoutcommit(xdr, rqstp, res);
7302         if (status)
7303                 goto out;
7304         decode_getfattr(xdr, res->fattr, res->server);
7305 out:
7306         return status;
7307 }
7308
7309 /*
7310  * Decode SECINFO_NO_NAME response
7311  */
7312 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7313                                         struct xdr_stream *xdr,
7314                                         struct nfs4_secinfo_res *res)
7315 {
7316         struct compound_hdr hdr;
7317         int status;
7318
7319         status = decode_compound_hdr(xdr, &hdr);
7320         if (status)
7321                 goto out;
7322         status = decode_sequence(xdr, &res->seq_res, rqstp);
7323         if (status)
7324                 goto out;
7325         status = decode_putrootfh(xdr);
7326         if (status)
7327                 goto out;
7328         status = decode_secinfo_no_name(xdr, res);
7329 out:
7330         return status;
7331 }
7332
7333 /*
7334  * Decode TEST_STATEID response
7335  */
7336 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7337                                      struct xdr_stream *xdr,
7338                                      struct nfs41_test_stateid_res *res)
7339 {
7340         struct compound_hdr hdr;
7341         int status;
7342
7343         status = decode_compound_hdr(xdr, &hdr);
7344         if (status)
7345                 goto out;
7346         status = decode_sequence(xdr, &res->seq_res, rqstp);
7347         if (status)
7348                 goto out;
7349         status = decode_test_stateid(xdr, res);
7350 out:
7351         return status;
7352 }
7353
7354 /*
7355  * Decode FREE_STATEID response
7356  */
7357 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7358                                      struct xdr_stream *xdr,
7359                                      struct nfs41_free_stateid_res *res)
7360 {
7361         struct compound_hdr hdr;
7362         int status;
7363
7364         status = decode_compound_hdr(xdr, &hdr);
7365         if (status)
7366                 goto out;
7367         status = decode_sequence(xdr, &res->seq_res, rqstp);
7368         if (status)
7369                 goto out;
7370         status = decode_free_stateid(xdr, res);
7371 out:
7372         return status;
7373 }
7374 #endif /* CONFIG_NFS_V4_1 */
7375
7376 /**
7377  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7378  *                      the local page cache.
7379  * @xdr: XDR stream where entry resides
7380  * @entry: buffer to fill in with entry data
7381  * @plus: boolean indicating whether this should be a readdirplus entry
7382  *
7383  * Returns zero if successful, otherwise a negative errno value is
7384  * returned.
7385  *
7386  * This function is not invoked during READDIR reply decoding, but
7387  * rather whenever an application invokes the getdents(2) system call
7388  * on a directory already in our cache.
7389  */
7390 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7391                        int plus)
7392 {
7393         unsigned int savep;
7394         uint32_t bitmap[3] = {0};
7395         uint32_t len;
7396         __be32 *p = xdr_inline_decode(xdr, 4);
7397         if (unlikely(!p))
7398                 goto out_overflow;
7399         if (*p == xdr_zero) {
7400                 p = xdr_inline_decode(xdr, 4);
7401                 if (unlikely(!p))
7402                         goto out_overflow;
7403                 if (*p == xdr_zero)
7404                         return -EAGAIN;
7405                 entry->eof = 1;
7406                 return -EBADCOOKIE;
7407         }
7408
7409         p = xdr_inline_decode(xdr, 12);
7410         if (unlikely(!p))
7411                 goto out_overflow;
7412         entry->prev_cookie = entry->cookie;
7413         p = xdr_decode_hyper(p, &entry->cookie);
7414         entry->len = be32_to_cpup(p);
7415
7416         p = xdr_inline_decode(xdr, entry->len);
7417         if (unlikely(!p))
7418                 goto out_overflow;
7419         entry->name = (const char *) p;
7420
7421         /*
7422          * In case the server doesn't return an inode number,
7423          * we fake one here.  (We don't use inode number 0,
7424          * since glibc seems to choke on it...)
7425          */
7426         entry->ino = 1;
7427         entry->fattr->valid = 0;
7428
7429         if (decode_attr_bitmap(xdr, bitmap) < 0)
7430                 goto out_overflow;
7431
7432         if (decode_attr_length(xdr, &len, &savep) < 0)
7433                 goto out_overflow;
7434
7435         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7436                         NULL, entry->label, entry->server) < 0)
7437                 goto out_overflow;
7438         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7439                 entry->ino = entry->fattr->mounted_on_fileid;
7440         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7441                 entry->ino = entry->fattr->fileid;
7442
7443         entry->d_type = DT_UNKNOWN;
7444         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7445                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7446
7447         return 0;
7448
7449 out_overflow:
7450         print_overflow_msg(__func__, xdr);
7451         return -EAGAIN;
7452 }
7453
7454 /*
7455  * We need to translate between nfs status return values and
7456  * the local errno values which may not be the same.
7457  */
7458 static struct {
7459         int stat;
7460         int errno;
7461 } nfs_errtbl[] = {
7462         { NFS4_OK,              0               },
7463         { NFS4ERR_PERM,         -EPERM          },
7464         { NFS4ERR_NOENT,        -ENOENT         },
7465         { NFS4ERR_IO,           -errno_NFSERR_IO},
7466         { NFS4ERR_NXIO,         -ENXIO          },
7467         { NFS4ERR_ACCESS,       -EACCES         },
7468         { NFS4ERR_EXIST,        -EEXIST         },
7469         { NFS4ERR_XDEV,         -EXDEV          },
7470         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7471         { NFS4ERR_ISDIR,        -EISDIR         },
7472         { NFS4ERR_INVAL,        -EINVAL         },
7473         { NFS4ERR_FBIG,         -EFBIG          },
7474         { NFS4ERR_NOSPC,        -ENOSPC         },
7475         { NFS4ERR_ROFS,         -EROFS          },
7476         { NFS4ERR_MLINK,        -EMLINK         },
7477         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7478         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7479         { NFS4ERR_DQUOT,        -EDQUOT         },
7480         { NFS4ERR_STALE,        -ESTALE         },
7481         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7482         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7483         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7484         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7485         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7486         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7487         { NFS4ERR_LOCKED,       -EAGAIN         },
7488         { NFS4ERR_SYMLINK,      -ELOOP          },
7489         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7490         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7491         { -1,                   -EIO            }
7492 };
7493
7494 /*
7495  * Convert an NFS error code to a local one.
7496  * This one is used jointly by NFSv2 and NFSv3.
7497  */
7498 static int
7499 nfs4_stat_to_errno(int stat)
7500 {
7501         int i;
7502         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7503                 if (nfs_errtbl[i].stat == stat)
7504                         return nfs_errtbl[i].errno;
7505         }
7506         if (stat <= 10000 || stat > 10100) {
7507                 /* The server is looney tunes. */
7508                 return -EREMOTEIO;
7509         }
7510         /* If we cannot translate the error, the recovery routines should
7511          * handle it.
7512          * Note: remaining NFSv4 error codes have values > 10000, so should
7513          * not conflict with native Linux error codes.
7514          */
7515         return -stat;
7516 }
7517
7518 #ifdef CONFIG_NFS_V4_2
7519 #include "nfs42xdr.c"
7520 #endif /* CONFIG_NFS_V4_2 */
7521
7522 #define PROC(proc, argtype, restype)                            \
7523 [NFSPROC4_CLNT_##proc] = {                                      \
7524         .p_proc   = NFSPROC4_COMPOUND,                          \
7525         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7526         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7527         .p_arglen = NFS4_##argtype##_sz,                        \
7528         .p_replen = NFS4_##restype##_sz,                        \
7529         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7530         .p_name   = #proc,                                      \
7531 }
7532
7533 #define STUB(proc)              \
7534 [NFSPROC4_CLNT_##proc] = {      \
7535         .p_name = #proc,        \
7536 }
7537
7538 struct rpc_procinfo     nfs4_procedures[] = {
7539         PROC(READ,              enc_read,               dec_read),
7540         PROC(WRITE,             enc_write,              dec_write),
7541         PROC(COMMIT,            enc_commit,             dec_commit),
7542         PROC(OPEN,              enc_open,               dec_open),
7543         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7544         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7545         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7546         PROC(CLOSE,             enc_close,              dec_close),
7547         PROC(SETATTR,           enc_setattr,            dec_setattr),
7548         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7549         PROC(RENEW,             enc_renew,              dec_renew),
7550         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7551         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7552         PROC(LOCK,              enc_lock,               dec_lock),
7553         PROC(LOCKT,             enc_lockt,              dec_lockt),
7554         PROC(LOCKU,             enc_locku,              dec_locku),
7555         PROC(ACCESS,            enc_access,             dec_access),
7556         PROC(GETATTR,           enc_getattr,            dec_getattr),
7557         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7558         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7559         PROC(REMOVE,            enc_remove,             dec_remove),
7560         PROC(RENAME,            enc_rename,             dec_rename),
7561         PROC(LINK,              enc_link,               dec_link),
7562         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7563         PROC(CREATE,            enc_create,             dec_create),
7564         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7565         PROC(STATFS,            enc_statfs,             dec_statfs),
7566         PROC(READLINK,          enc_readlink,           dec_readlink),
7567         PROC(READDIR,           enc_readdir,            dec_readdir),
7568         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7569         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7570         PROC(GETACL,            enc_getacl,             dec_getacl),
7571         PROC(SETACL,            enc_setacl,             dec_setacl),
7572         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7573         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7574         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7575         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7576 #if defined(CONFIG_NFS_V4_1)
7577         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7578         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7579         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7580         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7581         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7582         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7583         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7584         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7585         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7586         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7587         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7588         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7589         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7590         STUB(GETDEVICELIST),
7591         PROC(BIND_CONN_TO_SESSION,
7592                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7593         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7594 #endif /* CONFIG_NFS_V4_1 */
7595 #ifdef CONFIG_NFS_V4_2
7596         PROC(SEEK,              enc_seek,               dec_seek),
7597         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7598         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7599         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7600         PROC(CLONE,             enc_clone,              dec_clone),
7601         PROC(COPY,              enc_copy,               dec_copy),
7602 #endif /* CONFIG_NFS_V4_2 */
7603 };
7604
7605 const struct rpc_version nfs_version4 = {
7606         .number                 = 4,
7607         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7608         .procs                  = nfs4_procedures
7609 };
7610
7611 /*
7612  * Local variables:
7613  *  c-basic-offset: 8
7614  * End:
7615  */