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 <[email protected]>
  10  *  Andy Adamson   <[email protected]>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55
  56 #include "nfs4_fs.h"
  57 #include "internal.h"
  58 #include "nfs4idmap.h"
  59 #include "nfs4session.h"
  60 #include "pnfs.h"
  61 #include "netns.h"
  62
  63 #define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65 /* Mapping from NFS error code to "errno" error code. */
  66 #define errno_NFSERR_IO         EIO
  67
  68 static int nfs4_stat_to_errno(int);
  69
  70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71 #ifdef DEBUG
  72 #define NFS4_MAXTAGLEN          20
  73 #else
  74 #define NFS4_MAXTAGLEN          0
  75 #endif
  76
  77 /* lock,open owner id:
  78  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79  */
  80 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81 #define lock_owner_id_maxsz     (1 + 1 + 4)
  82 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define op_encode_hdr_maxsz     (1)
  86 #define op_decode_hdr_maxsz     (2)
  87 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                 (NFS4_FHSIZE >> 2))
  93 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                 ((3+NFS4_FHSIZE) >> 2))
  99 #define nfs4_fattr_bitmap_maxsz 4
 100 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101 #define nfstime4_maxsz          (3)
 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*nfstime4_maxsz + \
 117                                 nfs4_owner_maxsz + \
 118                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 119                                  decode_mdsthreshold_maxsz))
 120 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 121                                 nfs4_fattr_value_maxsz)
 122 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 123 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 124                                  1 + 2 + 1 + \
 125                                 nfs4_owner_maxsz + \
 126                                 nfs4_group_maxsz + \
 127                                 nfs4_label_maxsz + \
 128                                 1 + nfstime4_maxsz + \
 129                                 1 + nfstime4_maxsz)
 130 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 131 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 132 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 133 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 134 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 135 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 136  * layout types will be returned.
 137  */
 138 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 139                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 140 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 141 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 142 #define encode_setclientid_maxsz \
 143                                 (op_encode_hdr_maxsz + \
 144                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 145                                 /* client name */ \
 146                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 147                                 1 /* sc_prog */ + \
 148                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 149                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 150                                 1) /* sc_cb_ident */
 151 #define decode_setclientid_maxsz \
 152                                 (op_decode_hdr_maxsz + \
 153                                 2 /* clientid */ + \
 154                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 155                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 156                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 157 #define encode_setclientid_confirm_maxsz \
 158                                 (op_encode_hdr_maxsz + \
 159                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 160 #define decode_setclientid_confirm_maxsz \
 161                                 (op_decode_hdr_maxsz)
 162 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 163 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 164 #define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 165 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 166 #define encode_share_access_maxsz \
 167                                 (2)
 168 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 169 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 170 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 171 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 172                                 2 + encode_share_access_maxsz + 2 + \
 173                                 open_owner_id_maxsz + \
 174                                 encode_opentype_maxsz + \
 175                                 encode_claim_null_maxsz)
 176 #define decode_space_limit_maxsz        (3)
 177 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 178 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 179                                 decode_space_limit_maxsz + \
 180                                 decode_ace_maxsz)
 181 #define decode_change_info_maxsz        (5)
 182 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 183                                 decode_stateid_maxsz + \
 184                                 decode_change_info_maxsz + 1 + \
 185                                 nfs4_fattr_bitmap_maxsz + \
 186                                 decode_delegation_maxsz)
 187 #define encode_open_confirm_maxsz \
 188                                 (op_encode_hdr_maxsz + \
 189                                  encode_stateid_maxsz + 1)
 190 #define decode_open_confirm_maxsz \
 191                                 (op_decode_hdr_maxsz + \
 192                                  decode_stateid_maxsz)
 193 #define encode_open_downgrade_maxsz \
 194                                 (op_encode_hdr_maxsz + \
 195                                  encode_stateid_maxsz + 1 + \
 196                                  encode_share_access_maxsz)
 197 #define decode_open_downgrade_maxsz \
 198                                 (op_decode_hdr_maxsz + \
 199                                  decode_stateid_maxsz)
 200 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 201                                  1 + encode_stateid_maxsz)
 202 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 203                                  decode_stateid_maxsz)
 204 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 205                                  encode_stateid_maxsz + \
 206                                  encode_attrs_maxsz)
 207 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 208                                  nfs4_fattr_bitmap_maxsz)
 209 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 210                                  encode_stateid_maxsz + 3)
 211 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 212 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 213                                  2 + encode_verifier_maxsz + 5 + \
 214                                 nfs4_label_maxsz)
 215 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 216                                  decode_verifier_maxsz)
 217 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 218 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 219 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 220                                  encode_stateid_maxsz + 4)
 221 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 222                                  2 + decode_verifier_maxsz)
 223 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 224 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 225                                  decode_verifier_maxsz)
 226 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 227                                 nfs4_name_maxsz)
 228 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 229                                  decode_change_info_maxsz)
 230 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 231                                 2 * nfs4_name_maxsz)
 232 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 233                                  decode_change_info_maxsz + \
 234                                  decode_change_info_maxsz)
 235 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 236                                 nfs4_name_maxsz)
 237 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 238 #define encode_lockowner_maxsz  (7)
 239 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 240                                  7 + \
 241                                  1 + encode_stateid_maxsz + 1 + \
 242                                  encode_lockowner_maxsz)
 243 #define decode_lock_denied_maxsz \
 244                                 (8 + decode_lockowner_maxsz)
 245 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 246                                  decode_lock_denied_maxsz)
 247 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 248                                 encode_lockowner_maxsz)
 249 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 250                                  decode_lock_denied_maxsz)
 251 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 252                                  encode_stateid_maxsz + \
 253                                  4)
 254 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 255                                  decode_stateid_maxsz)
 256 #define encode_release_lockowner_maxsz \
 257                                 (op_encode_hdr_maxsz + \
 258                                  encode_lockowner_maxsz)
 259 #define decode_release_lockowner_maxsz \
 260                                 (op_decode_hdr_maxsz)
 261 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 262 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 263 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 264                                 1 + nfs4_name_maxsz + \
 265                                 1 + \
 266                                 nfs4_fattr_maxsz)
 267 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 268 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 269                                 1 + 2 + nfs4_name_maxsz + \
 270                                 encode_attrs_maxsz)
 271 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 272                                 decode_change_info_maxsz + \
 273                                 nfs4_fattr_bitmap_maxsz)
 274 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 275 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 276 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 277 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 278 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 279 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 280                                  nfs4_fattr_bitmap_maxsz + 1)
 281 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 282                                  encode_stateid_maxsz + 3)
 283 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 284 #define encode_fs_locations_maxsz \
 285                                 (encode_getattr_maxsz)
 286 #define decode_fs_locations_maxsz \
 287                                 (0)
 288 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 289 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 290
 291 #if defined(CONFIG_NFS_V4_1)
 292 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 293 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 294                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 295
 296 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 297                                 encode_verifier_maxsz + \
 298                                 1 /* co_ownerid.len */ + \
 299                                 /* eia_clientowner */ \
 300                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 301                                 1 /* flags */ + \
 302                                 1 /* spa_how */ + \
 303                                 /* max is SP4_MACH_CRED (for now) */ + \
 304                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 305                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 306                                 1 /* implementation id array of size 1 */ + \
 307                                 1 /* nii_domain */ + \
 308                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 309                                 1 /* nii_name */ + \
 310                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 311                                 3 /* nii_date */)
 312 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 313                                 2 /* eir_clientid */ + \
 314                                 1 /* eir_sequenceid */ + \
 315                                 1 /* eir_flags */ + \
 316                                 1 /* spr_how */ + \
 317                                   /* max is SP4_MACH_CRED (for now) */ + \
 318                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 319                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 320                                 2 /* eir_server_owner.so_minor_id */ + \
 321                                 /* eir_server_owner.so_major_id<> */ \
 322                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 323                                 /* eir_server_scope<> */ \
 324                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 325                                 1 /* eir_server_impl_id array length */ + \
 326                                 1 /* nii_domain */ + \
 327                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 328                                 1 /* nii_name */ + \
 329                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 330                                 3 /* nii_date */)
 331 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 332 #define decode_channel_attrs_maxsz  (6 + \
 333                                      1 /* ca_rdma_ird.len */ + \
 334                                      1 /* ca_rdma_ird */)
 335 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 336                                      2 /* csa_clientid */ + \
 337                                      1 /* csa_sequence */ + \
 338                                      1 /* csa_flags */ + \
 339                                      encode_channel_attrs_maxsz + \
 340                                      encode_channel_attrs_maxsz + \
 341                                      1 /* csa_cb_program */ + \
 342                                      1 /* csa_sec_parms.len (1) */ + \
 343                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 344                                      1 /* stamp */ + \
 345                                      1 /* machinename.len */ + \
 346                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 347                                      1 /* uid */ + \
 348                                      1 /* gid */ + \
 349                                      1 /* gids.len (0) */)
 350 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 351                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 352                                      1 /* csr_sequence */ + \
 353                                      1 /* csr_flags */ + \
 354                                      decode_channel_attrs_maxsz + \
 355                                      decode_channel_attrs_maxsz)
 356 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 357                                      /* bctsa_sessid */ \
 358                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 359                                      1 /* bctsa_dir */ + \
 360                                      1 /* bctsa_use_conn_in_rdma_mode */)
 361 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 362                                      /* bctsr_sessid */ \
 363                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 364                                      1 /* bctsr_dir */ + \
 365                                      1 /* bctsr_use_conn_in_rdma_mode */)
 366 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 367 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 368 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 369 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 370 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 371                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 372 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 373                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 374 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 375 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 376 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 377                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 378                                 1 /* layout type */ + \
 379                                 1 /* maxcount */ + \
 380                                 1 /* bitmap size */ + \
 381                                 1 /* notification bitmap length */ + \
 382                                 1 /* notification bitmap, word 0 */)
 383 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 384                                 1 /* layout type */ + \
 385                                 1 /* opaque devaddr4 length */ + \
 386                                   /* devaddr4 payload is read into page */ \
 387                                 1 /* notification bitmap length */ + \
 388                                 1 /* notification bitmap, word 0 */)
 389 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 390                                 encode_stateid_maxsz)
 391 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 392                                 decode_stateid_maxsz + \
 393                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 394 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 395                                 2 /* offset */ + \
 396                                 2 /* length */ + \
 397                                 1 /* reclaim */ + \
 398                                 encode_stateid_maxsz + \
 399                                 1 /* new offset (true) */ + \
 400                                 2 /* last byte written */ + \
 401                                 1 /* nt_timechanged (false) */ + \
 402                                 1 /* layoutupdate4 layout type */ + \
 403                                 1 /* layoutupdate4 opaqueue len */)
 404                                   /* the actual content of layoutupdate4 should
 405                                      be allocated by drivers and spliced in
 406                                      using xdr_write_pages */
 407 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 408 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 409                                 encode_stateid_maxsz + \
 410                                 1 + \
 411                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 412 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 413                                 1 + decode_stateid_maxsz)
 414 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 415 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 416 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 417                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 418 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 419 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 420                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 421 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 422 #else /* CONFIG_NFS_V4_1 */
 423 #define encode_sequence_maxsz   0
 424 #define decode_sequence_maxsz   0
 425 #define encode_layoutreturn_maxsz 0
 426 #define decode_layoutreturn_maxsz 0
 427 #endif /* CONFIG_NFS_V4_1 */
 428
 429 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 430 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 431 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 432                                 encode_sequence_maxsz + \
 433                                 encode_putfh_maxsz + \
 434                                 encode_read_maxsz)
 435 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 436                                 decode_sequence_maxsz + \
 437                                 decode_putfh_maxsz + \
 438                                 decode_read_maxsz)
 439 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 440                                 encode_sequence_maxsz + \
 441                                 encode_putfh_maxsz + \
 442                                 encode_readlink_maxsz)
 443 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 444                                 decode_sequence_maxsz + \
 445                                 decode_putfh_maxsz + \
 446                                 decode_readlink_maxsz)
 447 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 448                                 encode_sequence_maxsz + \
 449                                 encode_putfh_maxsz + \
 450                                 encode_readdir_maxsz)
 451 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 452                                 decode_sequence_maxsz + \
 453                                 decode_putfh_maxsz + \
 454                                 decode_readdir_maxsz)
 455 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 456                                 encode_sequence_maxsz + \
 457                                 encode_putfh_maxsz + \
 458                                 encode_write_maxsz + \
 459                                 encode_getattr_maxsz)
 460 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 461                                 decode_sequence_maxsz + \
 462                                 decode_putfh_maxsz + \
 463                                 decode_write_maxsz + \
 464                                 decode_getattr_maxsz)
 465 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 466                                 encode_sequence_maxsz + \
 467                                 encode_putfh_maxsz + \
 468                                 encode_commit_maxsz)
 469 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 470                                 decode_sequence_maxsz + \
 471                                 decode_putfh_maxsz + \
 472                                 decode_commit_maxsz)
 473 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 474                                 encode_sequence_maxsz + \
 475                                 encode_putfh_maxsz + \
 476                                 encode_open_maxsz + \
 477                                 encode_access_maxsz + \
 478                                 encode_getfh_maxsz + \
 479                                 encode_getattr_maxsz)
 480 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 481                                 decode_sequence_maxsz + \
 482                                 decode_putfh_maxsz + \
 483                                 decode_open_maxsz + \
 484                                 decode_access_maxsz + \
 485                                 decode_getfh_maxsz + \
 486                                 decode_getattr_maxsz)
 487 #define NFS4_enc_open_confirm_sz \
 488                                 (compound_encode_hdr_maxsz + \
 489                                  encode_putfh_maxsz + \
 490                                  encode_open_confirm_maxsz)
 491 #define NFS4_dec_open_confirm_sz \
 492                                 (compound_decode_hdr_maxsz + \
 493                                  decode_putfh_maxsz + \
 494                                  decode_open_confirm_maxsz)
 495 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 496                                         encode_sequence_maxsz + \
 497                                         encode_putfh_maxsz + \
 498                                         encode_open_maxsz + \
 499                                         encode_access_maxsz + \
 500                                         encode_getattr_maxsz)
 501 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 502                                         decode_sequence_maxsz + \
 503                                         decode_putfh_maxsz + \
 504                                         decode_open_maxsz + \
 505                                         decode_access_maxsz + \
 506                                         decode_getattr_maxsz)
 507 #define NFS4_enc_open_downgrade_sz \
 508                                 (compound_encode_hdr_maxsz + \
 509                                  encode_sequence_maxsz + \
 510                                  encode_putfh_maxsz + \
 511                                  encode_layoutreturn_maxsz + \
 512                                  encode_open_downgrade_maxsz)
 513 #define NFS4_dec_open_downgrade_sz \
 514                                 (compound_decode_hdr_maxsz + \
 515                                  decode_sequence_maxsz + \
 516                                  decode_putfh_maxsz + \
 517                                  decode_layoutreturn_maxsz + \
 518                                  decode_open_downgrade_maxsz)
 519 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 520                                  encode_sequence_maxsz + \
 521                                  encode_putfh_maxsz + \
 522                                  encode_layoutreturn_maxsz + \
 523                                  encode_close_maxsz + \
 524                                  encode_getattr_maxsz)
 525 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 526                                  decode_sequence_maxsz + \
 527                                  decode_putfh_maxsz + \
 528                                  decode_layoutreturn_maxsz + \
 529                                  decode_close_maxsz + \
 530                                  decode_getattr_maxsz)
 531 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 532                                  encode_sequence_maxsz + \
 533                                  encode_putfh_maxsz + \
 534                                  encode_setattr_maxsz + \
 535                                  encode_getattr_maxsz)
 536 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 537                                  decode_sequence_maxsz + \
 538                                  decode_putfh_maxsz + \
 539                                  decode_setattr_maxsz + \
 540                                  decode_getattr_maxsz)
 541 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 542                                 encode_sequence_maxsz + \
 543                                 encode_putfh_maxsz + \
 544                                 encode_fsinfo_maxsz)
 545 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 546                                 decode_sequence_maxsz + \
 547                                 decode_putfh_maxsz + \
 548                                 decode_fsinfo_maxsz)
 549 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 550                                 encode_renew_maxsz)
 551 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 552                                 decode_renew_maxsz)
 553 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 554                                 encode_setclientid_maxsz)
 555 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 556                                 decode_setclientid_maxsz)
 557 #define NFS4_enc_setclientid_confirm_sz \
 558                                 (compound_encode_hdr_maxsz + \
 559                                 encode_setclientid_confirm_maxsz)
 560 #define NFS4_dec_setclientid_confirm_sz \
 561                                 (compound_decode_hdr_maxsz + \
 562                                 decode_setclientid_confirm_maxsz)
 563 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 564                                 encode_sequence_maxsz + \
 565                                 encode_putfh_maxsz + \
 566                                 encode_lock_maxsz)
 567 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 568                                 decode_sequence_maxsz + \
 569                                 decode_putfh_maxsz + \
 570                                 decode_lock_maxsz)
 571 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 572                                 encode_sequence_maxsz + \
 573                                 encode_putfh_maxsz + \
 574                                 encode_lockt_maxsz)
 575 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 576                                  decode_sequence_maxsz + \
 577                                  decode_putfh_maxsz + \
 578                                  decode_lockt_maxsz)
 579 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 580                                 encode_sequence_maxsz + \
 581                                 encode_putfh_maxsz + \
 582                                 encode_locku_maxsz)
 583 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 584                                 decode_sequence_maxsz + \
 585                                 decode_putfh_maxsz + \
 586                                 decode_locku_maxsz)
 587 #define NFS4_enc_release_lockowner_sz \
 588                                 (compound_encode_hdr_maxsz + \
 589                                  encode_lockowner_maxsz)
 590 #define NFS4_dec_release_lockowner_sz \
 591                                 (compound_decode_hdr_maxsz + \
 592                                  decode_lockowner_maxsz)
 593 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 594                                 encode_sequence_maxsz + \
 595                                 encode_putfh_maxsz + \
 596                                 encode_access_maxsz + \
 597                                 encode_getattr_maxsz)
 598 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 599                                 decode_sequence_maxsz + \
 600                                 decode_putfh_maxsz + \
 601                                 decode_access_maxsz + \
 602                                 decode_getattr_maxsz)
 603 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 604                                 encode_sequence_maxsz + \
 605                                 encode_putfh_maxsz + \
 606                                 encode_getattr_maxsz + \
 607                                 encode_renew_maxsz)
 608 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz + \
 612                                 decode_renew_maxsz)
 613 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 614                                 encode_sequence_maxsz + \
 615                                 encode_putfh_maxsz + \
 616                                 encode_lookup_maxsz + \
 617                                 encode_getattr_maxsz + \
 618                                 encode_getfh_maxsz)
 619 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 620                                 decode_sequence_maxsz + \
 621                                 decode_putfh_maxsz + \
 622                                 decode_lookup_maxsz + \
 623                                 decode_getattr_maxsz + \
 624                                 decode_getfh_maxsz)
 625 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 626                                 encode_sequence_maxsz + \
 627                                 encode_putfh_maxsz + \
 628                                 encode_lookupp_maxsz + \
 629                                 encode_getattr_maxsz + \
 630                                 encode_getfh_maxsz)
 631 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 632                                 decode_sequence_maxsz + \
 633                                 decode_putfh_maxsz + \
 634                                 decode_lookupp_maxsz + \
 635                                 decode_getattr_maxsz + \
 636                                 decode_getfh_maxsz)
 637 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 638                                 encode_sequence_maxsz + \
 639                                 encode_putrootfh_maxsz + \
 640                                 encode_getattr_maxsz + \
 641                                 encode_getfh_maxsz)
 642 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 643                                 decode_sequence_maxsz + \
 644                                 decode_putrootfh_maxsz + \
 645                                 decode_getattr_maxsz + \
 646                                 decode_getfh_maxsz)
 647 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 648                                 encode_sequence_maxsz + \
 649                                 encode_putfh_maxsz + \
 650                                 encode_remove_maxsz)
 651 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 652                                 decode_sequence_maxsz + \
 653                                 decode_putfh_maxsz + \
 654                                 decode_remove_maxsz)
 655 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 656                                 encode_sequence_maxsz + \
 657                                 encode_putfh_maxsz + \
 658                                 encode_savefh_maxsz + \
 659                                 encode_putfh_maxsz + \
 660                                 encode_rename_maxsz)
 661 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 662                                 decode_sequence_maxsz + \
 663                                 decode_putfh_maxsz + \
 664                                 decode_savefh_maxsz + \
 665                                 decode_putfh_maxsz + \
 666                                 decode_rename_maxsz)
 667 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 668                                 encode_sequence_maxsz + \
 669                                 encode_putfh_maxsz + \
 670                                 encode_savefh_maxsz + \
 671                                 encode_putfh_maxsz + \
 672                                 encode_link_maxsz + \
 673                                 encode_restorefh_maxsz + \
 674                                 encode_getattr_maxsz)
 675 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_savefh_maxsz + \
 679                                 decode_putfh_maxsz + \
 680                                 decode_link_maxsz + \
 681                                 decode_restorefh_maxsz + \
 682                                 decode_getattr_maxsz)
 683 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 684                                 encode_sequence_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_symlink_maxsz + \
 687                                 encode_getattr_maxsz + \
 688                                 encode_getfh_maxsz)
 689 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_symlink_maxsz + \
 693                                 decode_getattr_maxsz + \
 694                                 decode_getfh_maxsz)
 695 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 696                                 encode_sequence_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_create_maxsz + \
 699                                 encode_getfh_maxsz + \
 700                                 encode_getattr_maxsz)
 701 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_create_maxsz + \
 705                                 decode_getfh_maxsz + \
 706                                 decode_getattr_maxsz)
 707 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 708                                 encode_sequence_maxsz + \
 709                                 encode_putfh_maxsz + \
 710                                 encode_getattr_maxsz)
 711 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 712                                 decode_sequence_maxsz + \
 713                                 decode_putfh_maxsz + \
 714                                 decode_getattr_maxsz)
 715 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 716                                 encode_sequence_maxsz + \
 717                                 encode_putfh_maxsz + \
 718                                 encode_statfs_maxsz)
 719 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 720                                 decode_sequence_maxsz + \
 721                                 decode_putfh_maxsz + \
 722                                 decode_statfs_maxsz)
 723 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 724                                 encode_sequence_maxsz + \
 725                                 encode_putfh_maxsz + \
 726                                 encode_getattr_maxsz)
 727 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 728                                 decode_sequence_maxsz + \
 729                                 decode_putfh_maxsz + \
 730                                 decode_getattr_maxsz)
 731 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 732                                 encode_sequence_maxsz + \
 733                                 encode_putfh_maxsz + \
 734                                 encode_layoutreturn_maxsz + \
 735                                 encode_delegreturn_maxsz + \
 736                                 encode_getattr_maxsz)
 737 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 738                                 decode_sequence_maxsz + \
 739                                 decode_putfh_maxsz + \
 740                                 decode_layoutreturn_maxsz + \
 741                                 decode_delegreturn_maxsz + \
 742                                 decode_getattr_maxsz)
 743 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 744                                 encode_sequence_maxsz + \
 745                                 encode_putfh_maxsz + \
 746                                 encode_getacl_maxsz)
 747 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 748                                 decode_sequence_maxsz + \
 749                                 decode_putfh_maxsz + \
 750                                 decode_getacl_maxsz)
 751 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 752                                 encode_sequence_maxsz + \
 753                                 encode_putfh_maxsz + \
 754                                 encode_setacl_maxsz)
 755 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 756                                 decode_sequence_maxsz + \
 757                                 decode_putfh_maxsz + \
 758                                 decode_setacl_maxsz)
 759 #define NFS4_enc_fs_locations_sz \
 760                                 (compound_encode_hdr_maxsz + \
 761                                  encode_sequence_maxsz + \
 762                                  encode_putfh_maxsz + \
 763                                  encode_lookup_maxsz + \
 764                                  encode_fs_locations_maxsz + \
 765                                  encode_renew_maxsz)
 766 #define NFS4_dec_fs_locations_sz \
 767                                 (compound_decode_hdr_maxsz + \
 768                                  decode_sequence_maxsz + \
 769                                  decode_putfh_maxsz + \
 770                                  decode_lookup_maxsz + \
 771                                  decode_fs_locations_maxsz + \
 772                                  decode_renew_maxsz)
 773 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 774                                 encode_sequence_maxsz + \
 775                                 encode_putfh_maxsz + \
 776                                 encode_secinfo_maxsz)
 777 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 778                                 decode_sequence_maxsz + \
 779                                 decode_putfh_maxsz + \
 780                                 decode_secinfo_maxsz)
 781 #define NFS4_enc_fsid_present_sz \
 782                                 (compound_encode_hdr_maxsz + \
 783                                  encode_sequence_maxsz + \
 784                                  encode_putfh_maxsz + \
 785                                  encode_getfh_maxsz + \
 786                                  encode_renew_maxsz)
 787 #define NFS4_dec_fsid_present_sz \
 788                                 (compound_decode_hdr_maxsz + \
 789                                  decode_sequence_maxsz + \
 790                                  decode_putfh_maxsz + \
 791                                  decode_getfh_maxsz + \
 792                                  decode_renew_maxsz)
 793 #if defined(CONFIG_NFS_V4_1)
 794 #define NFS4_enc_bind_conn_to_session_sz \
 795                                 (compound_encode_hdr_maxsz + \
 796                                  encode_bind_conn_to_session_maxsz)
 797 #define NFS4_dec_bind_conn_to_session_sz \
 798                                 (compound_decode_hdr_maxsz + \
 799                                  decode_bind_conn_to_session_maxsz)
 800 #define NFS4_enc_exchange_id_sz \
 801                                 (compound_encode_hdr_maxsz + \
 802                                  encode_exchange_id_maxsz)
 803 #define NFS4_dec_exchange_id_sz \
 804                                 (compound_decode_hdr_maxsz + \
 805                                  decode_exchange_id_maxsz)
 806 #define NFS4_enc_create_session_sz \
 807                                 (compound_encode_hdr_maxsz + \
 808                                  encode_create_session_maxsz)
 809 #define NFS4_dec_create_session_sz \
 810                                 (compound_decode_hdr_maxsz + \
 811                                  decode_create_session_maxsz)
 812 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 813                                          encode_destroy_session_maxsz)
 814 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 815                                          decode_destroy_session_maxsz)
 816 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 817                                          encode_destroy_clientid_maxsz)
 818 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 819                                          decode_destroy_clientid_maxsz)
 820 #define NFS4_enc_sequence_sz \
 821                                 (compound_decode_hdr_maxsz + \
 822                                  encode_sequence_maxsz)
 823 #define NFS4_dec_sequence_sz \
 824                                 (compound_decode_hdr_maxsz + \
 825                                  decode_sequence_maxsz)
 826 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 827                                          encode_sequence_maxsz + \
 828                                          encode_putrootfh_maxsz + \
 829                                          encode_fsinfo_maxsz)
 830 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 831                                          decode_sequence_maxsz + \
 832                                          decode_putrootfh_maxsz + \
 833                                          decode_fsinfo_maxsz)
 834 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 835                                          encode_sequence_maxsz + \
 836                                          encode_reclaim_complete_maxsz)
 837 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 838                                          decode_sequence_maxsz + \
 839                                          decode_reclaim_complete_maxsz)
 840 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 841                                 encode_sequence_maxsz +\
 842                                 encode_getdeviceinfo_maxsz)
 843 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 844                                 decode_sequence_maxsz + \
 845                                 decode_getdeviceinfo_maxsz)
 846 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 847                                 encode_sequence_maxsz + \
 848                                 encode_putfh_maxsz +        \
 849                                 encode_layoutget_maxsz)
 850 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 851                                 decode_sequence_maxsz + \
 852                                 decode_putfh_maxsz +        \
 853                                 decode_layoutget_maxsz)
 854 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 855                                 encode_sequence_maxsz +\
 856                                 encode_putfh_maxsz + \
 857                                 encode_layoutcommit_maxsz + \
 858                                 encode_getattr_maxsz)
 859 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 860                                 decode_sequence_maxsz + \
 861                                 decode_putfh_maxsz + \
 862                                 decode_layoutcommit_maxsz + \
 863                                 decode_getattr_maxsz)
 864 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 865                                 encode_sequence_maxsz + \
 866                                 encode_putfh_maxsz + \
 867                                 encode_layoutreturn_maxsz)
 868 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 869                                 decode_sequence_maxsz + \
 870                                 decode_putfh_maxsz + \
 871                                 decode_layoutreturn_maxsz)
 872 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 873                                         encode_sequence_maxsz + \
 874                                         encode_putrootfh_maxsz +\
 875                                         encode_secinfo_no_name_maxsz)
 876 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 877                                         decode_sequence_maxsz + \
 878                                         decode_putrootfh_maxsz + \
 879                                         decode_secinfo_no_name_maxsz)
 880 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 881                                          encode_sequence_maxsz + \
 882                                          encode_test_stateid_maxsz)
 883 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 884                                          decode_sequence_maxsz + \
 885                                          decode_test_stateid_maxsz)
 886 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 887                                          encode_sequence_maxsz + \
 888                                          encode_free_stateid_maxsz)
 889 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 890                                          decode_sequence_maxsz + \
 891                                          decode_free_stateid_maxsz)
 892
 893 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 894                                       compound_encode_hdr_maxsz +
 895                                       encode_sequence_maxsz +
 896                                       encode_putfh_maxsz +
 897                                       encode_getattr_maxsz) *
 898                                      XDR_UNIT);
 899
 900 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 901                                      compound_decode_hdr_maxsz +
 902                                      decode_sequence_maxsz +
 903                                      decode_putfh_maxsz) *
 904                                     XDR_UNIT);
 905
 906 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 907                                            compound_decode_hdr_maxsz +
 908                                            decode_sequence_maxsz) *
 909                                           XDR_UNIT);
 910 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 911 #endif /* CONFIG_NFS_V4_1 */
 912
 913 static const umode_t nfs_type2fmt[] = {
 914         [NF4BAD] = 0,
 915         [NF4REG] = S_IFREG,
 916         [NF4DIR] = S_IFDIR,
 917         [NF4BLK] = S_IFBLK,
 918         [NF4CHR] = S_IFCHR,
 919         [NF4LNK] = S_IFLNK,
 920         [NF4SOCK] = S_IFSOCK,
 921         [NF4FIFO] = S_IFIFO,
 922         [NF4ATTRDIR] = 0,
 923         [NF4NAMEDATTR] = 0,
 924 };
 925
 926 struct compound_hdr {
 927         int32_t         status;
 928         uint32_t        nops;
 929         __be32 *        nops_p;
 930         uint32_t        taglen;
 931         char *          tag;
 932         uint32_t        replen;         /* expected reply words */
 933         u32             minorversion;
 934 };
 935
 936 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 937 {
 938         __be32 *p = xdr_reserve_space(xdr, nbytes);
 939         BUG_ON(!p);
 940         return p;
 941 }
 942
 943 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 944 {
 945         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 946 }
 947
 948 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 949 {
 950         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 951 }
 952
 953 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 954 {
 955         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 956 }
 957
 958 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 959 {
 960         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 961 }
 962
 963 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 964                 const __u32 *bitmap, size_t len)
 965 {
 966         ssize_t ret;
 967
 968         /* Trim empty words */
 969         while (len > 0 && bitmap[len-1] == 0)
 970                 len--;
 971         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 972         if (WARN_ON_ONCE(ret < 0))
 973                 return ret;
 974         return len;
 975 }
 976
 977 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 978                 __u32 *res, size_t len)
 979 {
 980         size_t i;
 981         __u32 tmp;
 982
 983         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
 984                 len--;
 985         for (i = len; i-- > 0;) {
 986                 tmp = bitmap[i] & mask[i];
 987                 res[i] = tmp;
 988         }
 989         return len;
 990 }
 991
 992 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 993                 const struct nfs_seqid *seqid)
 994 {
 995         if (seqid != NULL)
 996                 encode_uint32(xdr, seqid->sequence->counter);
 997         else
 998                 encode_uint32(xdr, 0);
 999 }
1000
1001 static void encode_compound_hdr(struct xdr_stream *xdr,
1002                                 struct rpc_rqst *req,
1003                                 struct compound_hdr *hdr)
1004 {
1005         __be32 *p;
1006         struct rpc_auth *auth = req->rq_cred->cr_auth;
1007
1008         /* initialize running count of expected bytes in reply.
1009          * NOTE: the replied tag SHOULD be the same is the one sent,
1010          * but this is not required as a MUST for the server to do so. */
1011         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
1012
1013         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1014         encode_string(xdr, hdr->taglen, hdr->tag);
1015         p = reserve_space(xdr, 8);
1016         *p++ = cpu_to_be32(hdr->minorversion);
1017         hdr->nops_p = p;
1018         *p = cpu_to_be32(hdr->nops);
1019 }
1020
1021 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1022                 uint32_t replen,
1023                 struct compound_hdr *hdr)
1024 {
1025         encode_uint32(xdr, op);
1026         hdr->nops++;
1027         hdr->replen += replen;
1028 }
1029
1030 static void encode_nops(struct compound_hdr *hdr)
1031 {
1032         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1033         *hdr->nops_p = htonl(hdr->nops);
1034 }
1035
1036 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1037 {
1038         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1039 }
1040
1041 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1042 {
1043         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1044 }
1045
1046 static __be32 *
1047 xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1048 {
1049         p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1050         *p++ = cpu_to_be32(t->tv_nsec);
1051         return p;
1052 }
1053
1054 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1055                                 const struct nfs4_label *label,
1056                                 const umode_t *umask,
1057                                 const struct nfs_server *server,
1058                                 const uint32_t attrmask[])
1059 {
1060         char owner_name[IDMAP_NAMESZ];
1061         char owner_group[IDMAP_NAMESZ];
1062         int owner_namelen = 0;
1063         int owner_grouplen = 0;
1064         __be32 *p;
1065         uint32_t len = 0;
1066         uint32_t bmval[3] = { 0 };
1067
1068         /*
1069          * We reserve enough space to write the entire attribute buffer at once.
1070          */
1071         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1072                 bmval[0] |= FATTR4_WORD0_SIZE;
1073                 len += 8;
1074         }
1075         if (iap->ia_valid & ATTR_MODE) {
1076                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1077                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1078                         len += 8;
1079                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1080                         bmval[1] |= FATTR4_WORD1_MODE;
1081                         len += 4;
1082                 }
1083         }
1084         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1085                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1086                 if (owner_namelen < 0) {
1087                         dprintk("nfs: couldn't resolve uid %d to string\n",
1088                                         from_kuid(&init_user_ns, iap->ia_uid));
1089                         /* XXX */
1090                         strcpy(owner_name, "nobody");
1091                         owner_namelen = sizeof("nobody") - 1;
1092                         /* goto out; */
1093                 }
1094                 bmval[1] |= FATTR4_WORD1_OWNER;
1095                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1096         }
1097         if ((iap->ia_valid & ATTR_GID) &&
1098            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1099                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1100                 if (owner_grouplen < 0) {
1101                         dprintk("nfs: couldn't resolve gid %d to string\n",
1102                                         from_kgid(&init_user_ns, iap->ia_gid));
1103                         strcpy(owner_group, "nobody");
1104                         owner_grouplen = sizeof("nobody") - 1;
1105                         /* goto out; */
1106                 }
1107                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1108                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1109         }
1110         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1111                 if (iap->ia_valid & ATTR_ATIME_SET) {
1112                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1113                         len += 4 + (nfstime4_maxsz << 2);
1114                 } else if (iap->ia_valid & ATTR_ATIME) {
1115                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1116                         len += 4;
1117                 }
1118         }
1119         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1120                 if (iap->ia_valid & ATTR_MTIME_SET) {
1121                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1122                         len += 4 + (nfstime4_maxsz << 2);
1123                 } else if (iap->ia_valid & ATTR_MTIME) {
1124                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1125                         len += 4;
1126                 }
1127         }
1128
1129         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1130                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1131                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1132         }
1133
1134         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1135         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1136
1137         if (bmval[0] & FATTR4_WORD0_SIZE)
1138                 p = xdr_encode_hyper(p, iap->ia_size);
1139         if (bmval[1] & FATTR4_WORD1_MODE)
1140                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1141         if (bmval[1] & FATTR4_WORD1_OWNER)
1142                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1143         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1144                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1145         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1146                 if (iap->ia_valid & ATTR_ATIME_SET) {
1147                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1148                         p = xdr_encode_nfstime4(p, &iap->ia_atime);
1149                 } else
1150                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1151         }
1152         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1153                 if (iap->ia_valid & ATTR_MTIME_SET) {
1154                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1155                         p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1156                 } else
1157                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1158         }
1159         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1160                 *p++ = cpu_to_be32(label->lfs);
1161                 *p++ = cpu_to_be32(label->pi);
1162                 *p++ = cpu_to_be32(label->len);
1163                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1164         }
1165         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1166                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1167                 *p++ = cpu_to_be32(*umask);
1168         }
1169
1170 /* out: */
1171 }
1172
1173 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1174 {
1175         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1176         encode_uint32(xdr, access);
1177 }
1178
1179 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1180 {
1181         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1182         encode_nfs4_seqid(xdr, arg->seqid);
1183         encode_nfs4_stateid(xdr, &arg->stateid);
1184 }
1185
1186 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1187 {
1188         __be32 *p;
1189
1190         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1191         p = reserve_space(xdr, 12);
1192         p = xdr_encode_hyper(p, args->offset);
1193         *p = cpu_to_be32(args->count);
1194 }
1195
1196 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1197 {
1198         __be32 *p;
1199
1200         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1201         encode_uint32(xdr, create->ftype);
1202
1203         switch (create->ftype) {
1204         case NF4LNK:
1205                 p = reserve_space(xdr, 4);
1206                 *p = cpu_to_be32(create->u.symlink.len);
1207                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1208                                 create->u.symlink.len);
1209                 xdr->buf->flags |= XDRBUF_WRITE;
1210                 break;
1211
1212         case NF4BLK: case NF4CHR:
1213                 p = reserve_space(xdr, 8);
1214                 *p++ = cpu_to_be32(create->u.device.specdata1);
1215                 *p = cpu_to_be32(create->u.device.specdata2);
1216                 break;
1217
1218         default:
1219                 break;
1220         }
1221
1222         encode_string(xdr, create->name->len, create->name->name);
1223         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1224                         create->server, create->server->attr_bitmask);
1225 }
1226
1227 static void encode_getattr(struct xdr_stream *xdr,
1228                 const __u32 *bitmap, const __u32 *mask, size_t len,
1229                 struct compound_hdr *hdr)
1230 {
1231         __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1232
1233         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234         if (mask) {
1235                 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1236                         len = ARRAY_SIZE(masked_bitmap);
1237                 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1238                 bitmap = masked_bitmap;
1239         }
1240         xdr_encode_bitmap4(xdr, bitmap, len);
1241 }
1242
1243 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1244 {
1245         encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1246                         ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1247 }
1248
1249 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1250                                  const u32 *open_bitmap,
1251                                  struct compound_hdr *hdr)
1252 {
1253         encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1254 }
1255
1256 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1257 {
1258         encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1259                         ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1260 }
1261
1262 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1263 {
1264         encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1265                         ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1266 }
1267
1268 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1269 {
1270         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1271 }
1272
1273 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1274 {
1275         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1276         encode_string(xdr, name->len, name->name);
1277 }
1278
1279 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1280 {
1281         if (fl->fl_type == F_RDLCK)
1282                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1283         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1284 }
1285
1286 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1287 {
1288         if (fl->fl_end == OFFSET_MAX)
1289                 return ~(uint64_t)0;
1290         return fl->fl_end - fl->fl_start + 1;
1291 }
1292
1293 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1294 {
1295         __be32 *p;
1296
1297         p = reserve_space(xdr, 32);
1298         p = xdr_encode_hyper(p, lowner->clientid);
1299         *p++ = cpu_to_be32(20);
1300         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1301         *p++ = cpu_to_be32(lowner->s_dev);
1302         xdr_encode_hyper(p, lowner->id);
1303 }
1304
1305 /*
1306  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1307  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1308  */
1309 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1310 {
1311         __be32 *p;
1312
1313         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1314         p = reserve_space(xdr, 28);
1315         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1316         *p++ = cpu_to_be32(args->reclaim);
1317         p = xdr_encode_hyper(p, args->fl->fl_start);
1318         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1319         *p = cpu_to_be32(args->new_lock_owner);
1320         if (args->new_lock_owner){
1321                 encode_nfs4_seqid(xdr, args->open_seqid);
1322                 encode_nfs4_stateid(xdr, &args->open_stateid);
1323                 encode_nfs4_seqid(xdr, args->lock_seqid);
1324                 encode_lockowner(xdr, &args->lock_owner);
1325         }
1326         else {
1327                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1328                 encode_nfs4_seqid(xdr, args->lock_seqid);
1329         }
1330 }
1331
1332 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1333 {
1334         __be32 *p;
1335
1336         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1337         p = reserve_space(xdr, 20);
1338         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1339         p = xdr_encode_hyper(p, args->fl->fl_start);
1340         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1341         encode_lockowner(xdr, &args->lock_owner);
1342 }
1343
1344 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1345 {
1346         __be32 *p;
1347
1348         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1349         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1350         encode_nfs4_seqid(xdr, args->seqid);
1351         encode_nfs4_stateid(xdr, &args->stateid);
1352         p = reserve_space(xdr, 16);
1353         p = xdr_encode_hyper(p, args->fl->fl_start);
1354         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1355 }
1356
1357 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1358 {
1359         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1360         encode_lockowner(xdr, lowner);
1361 }
1362
1363 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1364 {
1365         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1366         encode_string(xdr, name->len, name->name);
1367 }
1368
1369 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1370 {
1371         encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1372 }
1373
1374 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1375 {
1376         __be32 *p;
1377
1378         p = reserve_space(xdr, 8);
1379         *p++ = cpu_to_be32(share_access);
1380         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1381 }
1382
1383 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1384 {
1385         __be32 *p;
1386  /*
1387  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1388  * owner 4 = 32
1389  */
1390         encode_nfs4_seqid(xdr, arg->seqid);
1391         encode_share_access(xdr, arg->share_access);
1392         p = reserve_space(xdr, 36);
1393         p = xdr_encode_hyper(p, arg->clientid);
1394         *p++ = cpu_to_be32(24);
1395         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1396         *p++ = cpu_to_be32(arg->server->s_dev);
1397         *p++ = cpu_to_be32(arg->id.uniquifier);
1398         xdr_encode_hyper(p, arg->id.create_time);
1399 }
1400
1401 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1402 {
1403         __be32 *p;
1404
1405         p = reserve_space(xdr, 4);
1406         switch(arg->createmode) {
1407         case NFS4_CREATE_UNCHECKED:
1408                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1409                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1410                                 arg->server, arg->server->attr_bitmask);
1411                 break;
1412         case NFS4_CREATE_GUARDED:
1413                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1414                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1415                                 arg->server, arg->server->attr_bitmask);
1416                 break;
1417         case NFS4_CREATE_EXCLUSIVE:
1418                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1419                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1420                 break;
1421         case NFS4_CREATE_EXCLUSIVE4_1:
1422                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1423                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1424                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1425                                 arg->server, arg->server->exclcreat_bitmask);
1426         }
1427 }
1428
1429 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1430 {
1431         __be32 *p;
1432
1433         p = reserve_space(xdr, 4);
1434         switch (arg->open_flags & O_CREAT) {
1435         case 0:
1436                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1437                 break;
1438         default:
1439                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1440                 encode_createmode(xdr, arg);
1441         }
1442 }
1443
1444 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1445 {
1446         __be32 *p;
1447
1448         p = reserve_space(xdr, 4);
1449         switch (delegation_type) {
1450         case 0:
1451                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1452                 break;
1453         case FMODE_READ:
1454                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1455                 break;
1456         case FMODE_WRITE|FMODE_READ:
1457                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1458                 break;
1459         default:
1460                 BUG();
1461         }
1462 }
1463
1464 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1465 {
1466         __be32 *p;
1467
1468         p = reserve_space(xdr, 4);
1469         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1470         encode_string(xdr, name->len, name->name);
1471 }
1472
1473 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1474 {
1475         __be32 *p;
1476
1477         p = reserve_space(xdr, 4);
1478         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1479         encode_delegation_type(xdr, type);
1480 }
1481
1482 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1483 {
1484         __be32 *p;
1485
1486         p = reserve_space(xdr, 4);
1487         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1488         encode_nfs4_stateid(xdr, stateid);
1489         encode_string(xdr, name->len, name->name);
1490 }
1491
1492 static inline void encode_claim_fh(struct xdr_stream *xdr)
1493 {
1494         __be32 *p;
1495
1496         p = reserve_space(xdr, 4);
1497         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1498 }
1499
1500 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1501 {
1502         __be32 *p;
1503
1504         p = reserve_space(xdr, 4);
1505         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1506         encode_nfs4_stateid(xdr, stateid);
1507 }
1508
1509 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1510 {
1511         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1512         encode_openhdr(xdr, arg);
1513         encode_opentype(xdr, arg);
1514         switch (arg->claim) {
1515         case NFS4_OPEN_CLAIM_NULL:
1516                 encode_claim_null(xdr, arg->name);
1517                 break;
1518         case NFS4_OPEN_CLAIM_PREVIOUS:
1519                 encode_claim_previous(xdr, arg->u.delegation_type);
1520                 break;
1521         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1522                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1523                 break;
1524         case NFS4_OPEN_CLAIM_FH:
1525                 encode_claim_fh(xdr);
1526                 break;
1527         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1528                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1529                 break;
1530         default:
1531                 BUG();
1532         }
1533 }
1534
1535 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1536 {
1537         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1538         encode_nfs4_stateid(xdr, arg->stateid);
1539         encode_nfs4_seqid(xdr, arg->seqid);
1540 }
1541
1542 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1543 {
1544         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1545         encode_nfs4_stateid(xdr, &arg->stateid);
1546         encode_nfs4_seqid(xdr, arg->seqid);
1547         encode_share_access(xdr, arg->share_access);
1548 }
1549
1550 static void
1551 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1552 {
1553         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1554         encode_string(xdr, fh->size, fh->data);
1555 }
1556
1557 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1558 {
1559         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1560 }
1561
1562 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1563                         struct compound_hdr *hdr)
1564 {
1565         __be32 *p;
1566
1567         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1568         encode_nfs4_stateid(xdr, &args->stateid);
1569
1570         p = reserve_space(xdr, 12);
1571         p = xdr_encode_hyper(p, args->offset);
1572         *p = cpu_to_be32(args->count);
1573 }
1574
1575 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1576 {
1577         uint32_t attrs[3] = {
1578                 FATTR4_WORD0_RDATTR_ERROR,
1579                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1580         };
1581         uint32_t dircount = readdir->count >> 1;
1582         __be32 *p, verf[2];
1583         uint32_t attrlen = 0;
1584         unsigned int i;
1585
1586         if (readdir->plus) {
1587                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1588                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1589                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1590                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1591                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1592                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1593                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1594                 dircount >>= 1;
1595         }
1596         /* Use mounted_on_fileid only if the server supports it */
1597         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1598                 attrs[0] |= FATTR4_WORD0_FILEID;
1599         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1600                 attrs[i] &= readdir->bitmask[i];
1601                 if (attrs[i] != 0)
1602                         attrlen = i+1;
1603         }
1604
1605         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1606         encode_uint64(xdr, readdir->cookie);
1607         encode_nfs4_verifier(xdr, &readdir->verifier);
1608         p = reserve_space(xdr, 12 + (attrlen << 2));
1609         *p++ = cpu_to_be32(dircount);
1610         *p++ = cpu_to_be32(readdir->count);
1611         *p++ = cpu_to_be32(attrlen);
1612         for (i = 0; i < attrlen; i++)
1613                 *p++ = cpu_to_be32(attrs[i]);
1614         memcpy(verf, readdir->verifier.data, sizeof(verf));
1615
1616         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1617                         __func__,
1618                         (unsigned long long)readdir->cookie,
1619                         verf[0], verf[1],
1620                         attrs[0] & readdir->bitmask[0],
1621                         attrs[1] & readdir->bitmask[1],
1622                         attrs[2] & readdir->bitmask[2]);
1623 }
1624
1625 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1626 {
1627         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1628 }
1629
1630 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1631 {
1632         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1633         encode_string(xdr, name->len, name->name);
1634 }
1635
1636 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1637 {
1638         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1639         encode_string(xdr, oldname->len, oldname->name);
1640         encode_string(xdr, newname->len, newname->name);
1641 }
1642
1643 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1644                          struct compound_hdr *hdr)
1645 {
1646         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1647         encode_uint64(xdr, clid);
1648 }
1649
1650 static void
1651 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1652 {
1653         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1654 }
1655
1656 static void
1657 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1658                 struct compound_hdr *hdr)
1659 {
1660         __be32 *p;
1661
1662         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1663         encode_nfs4_stateid(xdr, &zero_stateid);
1664         p = reserve_space(xdr, 2*4);
1665         *p++ = cpu_to_be32(1);
1666         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1667         p = reserve_space(xdr, 4);
1668         *p = cpu_to_be32(arg->acl_len);
1669         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1670 }
1671
1672 static void
1673 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1674 {
1675         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1676 }
1677
1678 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1679 {
1680         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1681         encode_nfs4_stateid(xdr, &arg->stateid);
1682         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1683                         server->attr_bitmask);
1684 }
1685
1686 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1687 {
1688         __be32 *p;
1689
1690         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1691         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1692
1693         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1694                         setclientid->sc_clnt->cl_owner_id);
1695         p = reserve_space(xdr, 4);
1696         *p = cpu_to_be32(setclientid->sc_prog);
1697         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1698         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1699         p = reserve_space(xdr, 4);
1700         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1701 }
1702
1703 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1704 {
1705         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1706                         decode_setclientid_confirm_maxsz, hdr);
1707         encode_uint64(xdr, arg->clientid);
1708         encode_nfs4_verifier(xdr, &arg->confirm);
1709 }
1710
1711 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1712                          struct compound_hdr *hdr)
1713 {
1714         __be32 *p;
1715
1716         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1717         encode_nfs4_stateid(xdr, &args->stateid);
1718
1719         p = reserve_space(xdr, 16);
1720         p = xdr_encode_hyper(p, args->offset);
1721         *p++ = cpu_to_be32(args->stable);
1722         *p = cpu_to_be32(args->count);
1723
1724         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1725 }
1726
1727 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1728 {
1729         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1730         encode_nfs4_stateid(xdr, stateid);
1731 }
1732
1733 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1734 {
1735         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1736         encode_string(xdr, name->len, name->name);
1737 }
1738
1739 #if defined(CONFIG_NFS_V4_1)
1740 /* NFSv4.1 operations */
1741 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1742                                    const struct nfs41_bind_conn_to_session_args *args,
1743                                    struct compound_hdr *hdr)
1744 {
1745         __be32 *p;
1746
1747         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1748                 decode_bind_conn_to_session_maxsz, hdr);
1749         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1750         p = xdr_reserve_space(xdr, 8);
1751         *p++ = cpu_to_be32(args->dir);
1752         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1753 }
1754
1755 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1756 {
1757         unsigned int i;
1758         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1759         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1760                 encode_uint32(xdr, op_map->u.words[i]);
1761 }
1762
1763 static void encode_exchange_id(struct xdr_stream *xdr,
1764                                const struct nfs41_exchange_id_args *args,
1765                                struct compound_hdr *hdr)
1766 {
1767         __be32 *p;
1768         char impl_name[IMPL_NAME_LIMIT];
1769         int len = 0;
1770
1771         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1772         encode_nfs4_verifier(xdr, &args->verifier);
1773
1774         encode_string(xdr, strlen(args->client->cl_owner_id),
1775                         args->client->cl_owner_id);
1776
1777         encode_uint32(xdr, args->flags);
1778         encode_uint32(xdr, args->state_protect.how);
1779
1780         switch (args->state_protect.how) {
1781         case SP4_NONE:
1782                 break;
1783         case SP4_MACH_CRED:
1784                 encode_op_map(xdr, &args->state_protect.enforce);
1785                 encode_op_map(xdr, &args->state_protect.allow);
1786                 break;
1787         default:
1788                 WARN_ON_ONCE(1);
1789                 break;
1790         }
1791
1792         if (send_implementation_id &&
1793             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1794             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1795                 <= sizeof(impl_name) + 1)
1796                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1797                                utsname()->sysname, utsname()->release,
1798                                utsname()->version, utsname()->machine);
1799
1800         if (len > 0) {
1801                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1802
1803                 encode_string(xdr,
1804                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1805                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1806                 encode_string(xdr, len, impl_name);
1807                 /* just send zeros for nii_date - the date is in nii_name */
1808                 p = reserve_space(xdr, 12);
1809                 p = xdr_encode_hyper(p, 0);
1810                 *p = cpu_to_be32(0);
1811         } else
1812                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1813 }
1814
1815 static void encode_create_session(struct xdr_stream *xdr,
1816                                   const struct nfs41_create_session_args *args,
1817                                   struct compound_hdr *hdr)
1818 {
1819         __be32 *p;
1820         struct nfs_client *clp = args->client;
1821         struct rpc_clnt *clnt = clp->cl_rpcclient;
1822         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1823         u32 max_resp_sz_cached;
1824
1825         /*
1826          * Assumes OPEN is the biggest non-idempotent compound.
1827          * 2 is the verifier.
1828          */
1829         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1830                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1831
1832         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1833         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1834         p = xdr_encode_hyper(p, args->clientid);
1835         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1836         *p++ = cpu_to_be32(args->flags);                        /*flags */
1837
1838         /* Fore Channel */
1839         *p++ = cpu_to_be32(0);                          /* header padding size */
1840         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1841         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1842         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1843         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1844         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1845         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1846
1847         /* Back Channel */
1848         *p++ = cpu_to_be32(0);                          /* header padding size */
1849         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1850         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1851         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1852         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1853         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1854         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1855
1856         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1857         *p++ = cpu_to_be32(1);
1858         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1859
1860         /* authsys_parms rfc1831 */
1861         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1862         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1863         *p++ = cpu_to_be32(0);                          /* UID */
1864         *p++ = cpu_to_be32(0);                          /* GID */
1865         *p = cpu_to_be32(0);                            /* No more gids */
1866 }
1867
1868 static void encode_destroy_session(struct xdr_stream *xdr,
1869                                    const struct nfs4_session *session,
1870                                    struct compound_hdr *hdr)
1871 {
1872         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1873         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1874 }
1875
1876 static void encode_destroy_clientid(struct xdr_stream *xdr,
1877                                    uint64_t clientid,
1878                                    struct compound_hdr *hdr)
1879 {
1880         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1881         encode_uint64(xdr, clientid);
1882 }
1883
1884 static void encode_reclaim_complete(struct xdr_stream *xdr,
1885                                     const struct nfs41_reclaim_complete_args *args,
1886                                     struct compound_hdr *hdr)
1887 {
1888         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1889         encode_uint32(xdr, args->one_fs);
1890 }
1891 #endif /* CONFIG_NFS_V4_1 */
1892
1893 static void encode_sequence(struct xdr_stream *xdr,
1894                             const struct nfs4_sequence_args *args,
1895                             struct compound_hdr *hdr)
1896 {
1897 #if defined(CONFIG_NFS_V4_1)
1898         struct nfs4_session *session;
1899         struct nfs4_slot_table *tp;
1900         struct nfs4_slot *slot = args->sa_slot;
1901         __be32 *p;
1902
1903         tp = slot->table;
1904         session = tp->session;
1905         if (!session)
1906                 return;
1907
1908         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1909
1910         /*
1911          * Sessionid + seqid + slotid + max slotid + cache_this
1912          */
1913         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1914                 "max_slotid=%d cache_this=%d\n",
1915                 __func__,
1916                 ((u32 *)session->sess_id.data)[0],
1917                 ((u32 *)session->sess_id.data)[1],
1918                 ((u32 *)session->sess_id.data)[2],
1919                 ((u32 *)session->sess_id.data)[3],
1920                 slot->seq_nr, slot->slot_nr,
1921                 tp->highest_used_slotid, args->sa_cache_this);
1922         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1923         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1924         *p++ = cpu_to_be32(slot->seq_nr);
1925         *p++ = cpu_to_be32(slot->slot_nr);
1926         *p++ = cpu_to_be32(tp->highest_used_slotid);
1927         *p = cpu_to_be32(args->sa_cache_this);
1928 #endif /* CONFIG_NFS_V4_1 */
1929 }
1930
1931 #ifdef CONFIG_NFS_V4_1
1932 static void
1933 encode_getdeviceinfo(struct xdr_stream *xdr,
1934                      const struct nfs4_getdeviceinfo_args *args,
1935                      struct compound_hdr *hdr)
1936 {
1937         __be32 *p;
1938
1939         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1940         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1941         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1942                                     NFS4_DEVICEID4_SIZE);
1943         *p++ = cpu_to_be32(args->pdev->layout_type);
1944         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1945
1946         p = reserve_space(xdr, 4 + 4);
1947         *p++ = cpu_to_be32(1);                  /* bitmap length */
1948         *p++ = cpu_to_be32(args->notify_types);
1949 }
1950
1951 static void
1952 encode_layoutget(struct xdr_stream *xdr,
1953                       const struct nfs4_layoutget_args *args,
1954                       struct compound_hdr *hdr)
1955 {
1956         __be32 *p;
1957
1958         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1959         p = reserve_space(xdr, 36);
1960         *p++ = cpu_to_be32(0);     /* Signal layout available */
1961         *p++ = cpu_to_be32(args->type);
1962         *p++ = cpu_to_be32(args->range.iomode);
1963         p = xdr_encode_hyper(p, args->range.offset);
1964         p = xdr_encode_hyper(p, args->range.length);
1965         p = xdr_encode_hyper(p, args->minlength);
1966         encode_nfs4_stateid(xdr, &args->stateid);
1967         encode_uint32(xdr, args->maxcount);
1968
1969         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1970                 __func__,
1971                 args->type,
1972                 args->range.iomode,
1973                 (unsigned long)args->range.offset,
1974                 (unsigned long)args->range.length,
1975                 args->maxcount);
1976 }
1977
1978 static int
1979 encode_layoutcommit(struct xdr_stream *xdr,
1980                     struct inode *inode,
1981                     const struct nfs4_layoutcommit_args *args,
1982                     struct compound_hdr *hdr)
1983 {
1984         __be32 *p;
1985
1986         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1987                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1988
1989         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1990         p = reserve_space(xdr, 20);
1991         /* Only whole file layouts */
1992         p = xdr_encode_hyper(p, 0); /* offset */
1993         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1994         *p = cpu_to_be32(0); /* reclaim */
1995         encode_nfs4_stateid(xdr, &args->stateid);
1996         if (args->lastbytewritten != U64_MAX) {
1997                 p = reserve_space(xdr, 20);
1998                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1999                 p = xdr_encode_hyper(p, args->lastbytewritten);
2000         } else {
2001                 p = reserve_space(xdr, 12);
2002                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2003         }
2004         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2005         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2006
2007         encode_uint32(xdr, args->layoutupdate_len);
2008         if (args->layoutupdate_pages)
2009                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2010                                 args->layoutupdate_len);
2011
2012         return 0;
2013 }
2014
2015 static void
2016 encode_layoutreturn(struct xdr_stream *xdr,
2017                     const struct nfs4_layoutreturn_args *args,
2018                     struct compound_hdr *hdr)
2019 {
2020         __be32 *p;
2021
2022         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2023         p = reserve_space(xdr, 16);
2024         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2025         *p++ = cpu_to_be32(args->layout_type);
2026         *p++ = cpu_to_be32(args->range.iomode);
2027         *p = cpu_to_be32(RETURN_FILE);
2028         p = reserve_space(xdr, 16);
2029         p = xdr_encode_hyper(p, args->range.offset);
2030         p = xdr_encode_hyper(p, args->range.length);
2031         spin_lock(&args->inode->i_lock);
2032         encode_nfs4_stateid(xdr, &args->stateid);
2033         spin_unlock(&args->inode->i_lock);
2034         if (args->ld_private->ops && args->ld_private->ops->encode)
2035                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2036         else
2037                 encode_uint32(xdr, 0);
2038 }
2039
2040 static int
2041 encode_secinfo_no_name(struct xdr_stream *xdr,
2042                        const struct nfs41_secinfo_no_name_args *args,
2043                        struct compound_hdr *hdr)
2044 {
2045         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2046         encode_uint32(xdr, args->style);
2047         return 0;
2048 }
2049
2050 static void encode_test_stateid(struct xdr_stream *xdr,
2051                                 const struct nfs41_test_stateid_args *args,
2052                                 struct compound_hdr *hdr)
2053 {
2054         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2055         encode_uint32(xdr, 1);
2056         encode_nfs4_stateid(xdr, args->stateid);
2057 }
2058
2059 static void encode_free_stateid(struct xdr_stream *xdr,
2060                                 const struct nfs41_free_stateid_args *args,
2061                                 struct compound_hdr *hdr)
2062 {
2063         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2064         encode_nfs4_stateid(xdr, &args->stateid);
2065 }
2066 #else
2067 static inline void
2068 encode_layoutreturn(struct xdr_stream *xdr,
2069                     const struct nfs4_layoutreturn_args *args,
2070                     struct compound_hdr *hdr)
2071 {
2072 }
2073 #endif /* CONFIG_NFS_V4_1 */
2074
2075 /*
2076  * END OF "GENERIC" ENCODE ROUTINES.
2077  */
2078
2079 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2080 {
2081 #if defined(CONFIG_NFS_V4_1)
2082         struct nfs4_session *session = args->sa_slot->table->session;
2083         if (session)
2084                 return session->clp->cl_mvops->minor_version;
2085 #endif /* CONFIG_NFS_V4_1 */
2086         return 0;
2087 }
2088
2089 /*
2090  * Encode an ACCESS request
2091  */
2092 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2093                                 const void *data)
2094 {
2095         const struct nfs4_accessargs *args = data;
2096         struct compound_hdr hdr = {
2097                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098         };
2099
2100         encode_compound_hdr(xdr, req, &hdr);
2101         encode_sequence(xdr, &args->seq_args, &hdr);
2102         encode_putfh(xdr, args->fh, &hdr);
2103         encode_access(xdr, args->access, &hdr);
2104         if (args->bitmask)
2105                 encode_getfattr(xdr, args->bitmask, &hdr);
2106         encode_nops(&hdr);
2107 }
2108
2109 /*
2110  * Encode LOOKUP request
2111  */
2112 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                 const void *data)
2114 {
2115         const struct nfs4_lookup_arg *args = data;
2116         struct compound_hdr hdr = {
2117                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2118         };
2119
2120         encode_compound_hdr(xdr, req, &hdr);
2121         encode_sequence(xdr, &args->seq_args, &hdr);
2122         encode_putfh(xdr, args->dir_fh, &hdr);
2123         encode_lookup(xdr, args->name, &hdr);
2124         encode_getfh(xdr, &hdr);
2125         encode_getfattr(xdr, args->bitmask, &hdr);
2126         encode_nops(&hdr);
2127 }
2128
2129 /*
2130  * Encode LOOKUPP request
2131  */
2132 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2133                 const void *data)
2134 {
2135         const struct nfs4_lookupp_arg *args = data;
2136         struct compound_hdr hdr = {
2137                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2138         };
2139
2140         encode_compound_hdr(xdr, req, &hdr);
2141         encode_sequence(xdr, &args->seq_args, &hdr);
2142         encode_putfh(xdr, args->fh, &hdr);
2143         encode_lookupp(xdr, &hdr);
2144         encode_getfh(xdr, &hdr);
2145         encode_getfattr(xdr, args->bitmask, &hdr);
2146         encode_nops(&hdr);
2147 }
2148
2149 /*
2150  * Encode LOOKUP_ROOT request
2151  */
2152 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2153                                      struct xdr_stream *xdr,
2154                                      const void *data)
2155 {
2156         const struct nfs4_lookup_root_arg *args = data;
2157         struct compound_hdr hdr = {
2158                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2159         };
2160
2161         encode_compound_hdr(xdr, req, &hdr);
2162         encode_sequence(xdr, &args->seq_args, &hdr);
2163         encode_putrootfh(xdr, &hdr);
2164         encode_getfh(xdr, &hdr);
2165         encode_getfattr(xdr, args->bitmask, &hdr);
2166         encode_nops(&hdr);
2167 }
2168
2169 /*
2170  * Encode REMOVE request
2171  */
2172 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2173                                 const void *data)
2174 {
2175         const struct nfs_removeargs *args = data;
2176         struct compound_hdr hdr = {
2177                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2178         };
2179
2180         encode_compound_hdr(xdr, req, &hdr);
2181         encode_sequence(xdr, &args->seq_args, &hdr);
2182         encode_putfh(xdr, args->fh, &hdr);
2183         encode_remove(xdr, &args->name, &hdr);
2184         encode_nops(&hdr);
2185 }
2186
2187 /*
2188  * Encode RENAME request
2189  */
2190 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2191                                 const void *data)
2192 {
2193         const struct nfs_renameargs *args = data;
2194         struct compound_hdr hdr = {
2195                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196         };
2197
2198         encode_compound_hdr(xdr, req, &hdr);
2199         encode_sequence(xdr, &args->seq_args, &hdr);
2200         encode_putfh(xdr, args->old_dir, &hdr);
2201         encode_savefh(xdr, &hdr);
2202         encode_putfh(xdr, args->new_dir, &hdr);
2203         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2204         encode_nops(&hdr);
2205 }
2206
2207 /*
2208  * Encode LINK request
2209  */
2210 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2211                               const void *data)
2212 {
2213         const struct nfs4_link_arg *args = data;
2214         struct compound_hdr hdr = {
2215                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2216         };
2217
2218         encode_compound_hdr(xdr, req, &hdr);
2219         encode_sequence(xdr, &args->seq_args, &hdr);
2220         encode_putfh(xdr, args->fh, &hdr);
2221         encode_savefh(xdr, &hdr);
2222         encode_putfh(xdr, args->dir_fh, &hdr);
2223         encode_link(xdr, args->name, &hdr);
2224         encode_restorefh(xdr, &hdr);
2225         encode_getfattr(xdr, args->bitmask, &hdr);
2226         encode_nops(&hdr);
2227 }
2228
2229 /*
2230  * Encode CREATE request
2231  */
2232 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2233                                 const void *data)
2234 {
2235         const struct nfs4_create_arg *args = data;
2236         struct compound_hdr hdr = {
2237                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238         };
2239
2240         encode_compound_hdr(xdr, req, &hdr);
2241         encode_sequence(xdr, &args->seq_args, &hdr);
2242         encode_putfh(xdr, args->dir_fh, &hdr);
2243         encode_create(xdr, args, &hdr);
2244         encode_getfh(xdr, &hdr);
2245         encode_getfattr(xdr, args->bitmask, &hdr);
2246         encode_nops(&hdr);
2247 }
2248
2249 /*
2250  * Encode SYMLINK request
2251  */
2252 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2253                                  const void *data)
2254 {
2255         const struct nfs4_create_arg *args = data;
2256
2257         nfs4_xdr_enc_create(req, xdr, args);
2258 }
2259
2260 /*
2261  * Encode GETATTR request
2262  */
2263 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2264                                  const void *data)
2265 {
2266         const struct nfs4_getattr_arg *args = data;
2267         struct compound_hdr hdr = {
2268                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2269         };
2270
2271         encode_compound_hdr(xdr, req, &hdr);
2272         encode_sequence(xdr, &args->seq_args, &hdr);
2273         encode_putfh(xdr, args->fh, &hdr);
2274         encode_getfattr(xdr, args->bitmask, &hdr);
2275         encode_nops(&hdr);
2276 }
2277
2278 /*
2279  * Encode a CLOSE request
2280  */
2281 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2282                                const void *data)
2283 {
2284         const struct nfs_closeargs *args = data;
2285         struct compound_hdr hdr = {
2286                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2287         };
2288
2289         encode_compound_hdr(xdr, req, &hdr);
2290         encode_sequence(xdr, &args->seq_args, &hdr);
2291         encode_putfh(xdr, args->fh, &hdr);
2292         if (args->lr_args)
2293                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2294         if (args->bitmask != NULL)
2295                 encode_getfattr(xdr, args->bitmask, &hdr);
2296         encode_close(xdr, args, &hdr);
2297         encode_nops(&hdr);
2298 }
2299
2300 /*
2301  * Encode an OPEN request
2302  */
2303 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2304                               const void *data)
2305 {
2306         const struct nfs_openargs *args = data;
2307         struct compound_hdr hdr = {
2308                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309         };
2310
2311         encode_compound_hdr(xdr, req, &hdr);
2312         encode_sequence(xdr, &args->seq_args, &hdr);
2313         encode_putfh(xdr, args->fh, &hdr);
2314         encode_open(xdr, args, &hdr);
2315         encode_getfh(xdr, &hdr);
2316         if (args->access)
2317                 encode_access(xdr, args->access, &hdr);
2318         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode an OPEN_CONFIRM request
2324  */
2325 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2326                                       struct xdr_stream *xdr,
2327                                       const void *data)
2328 {
2329         const struct nfs_open_confirmargs *args = data;
2330         struct compound_hdr hdr = {
2331                 .nops   = 0,
2332         };
2333
2334         encode_compound_hdr(xdr, req, &hdr);
2335         encode_putfh(xdr, args->fh, &hdr);
2336         encode_open_confirm(xdr, args, &hdr);
2337         encode_nops(&hdr);
2338 }
2339
2340 /*
2341  * Encode an OPEN request with no attributes.
2342  */
2343 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2344                                      struct xdr_stream *xdr,
2345                                      const void *data)
2346 {
2347         const struct nfs_openargs *args = data;
2348         struct compound_hdr hdr = {
2349                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350         };
2351
2352         encode_compound_hdr(xdr, req, &hdr);
2353         encode_sequence(xdr, &args->seq_args, &hdr);
2354         encode_putfh(xdr, args->fh, &hdr);
2355         encode_open(xdr, args, &hdr);
2356         if (args->access)
2357                 encode_access(xdr, args->access, &hdr);
2358         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2359         encode_nops(&hdr);
2360 }
2361
2362 /*
2363  * Encode an OPEN_DOWNGRADE request
2364  */
2365 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2366                                         struct xdr_stream *xdr,
2367                                         const void *data)
2368 {
2369         const struct nfs_closeargs *args = data;
2370         struct compound_hdr hdr = {
2371                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2372         };
2373
2374         encode_compound_hdr(xdr, req, &hdr);
2375         encode_sequence(xdr, &args->seq_args, &hdr);
2376         encode_putfh(xdr, args->fh, &hdr);
2377         if (args->lr_args)
2378                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2379         encode_open_downgrade(xdr, args, &hdr);
2380         encode_nops(&hdr);
2381 }
2382
2383 /*
2384  * Encode a LOCK request
2385  */
2386 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2387                               const void *data)
2388 {
2389         const struct nfs_lock_args *args = data;
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_lock(xdr, args, &hdr);
2398         encode_nops(&hdr);
2399 }
2400
2401 /*
2402  * Encode a LOCKT request
2403  */
2404 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2405                                const void *data)
2406 {
2407         const struct nfs_lockt_args *args = data;
2408         struct compound_hdr hdr = {
2409                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2410         };
2411
2412         encode_compound_hdr(xdr, req, &hdr);
2413         encode_sequence(xdr, &args->seq_args, &hdr);
2414         encode_putfh(xdr, args->fh, &hdr);
2415         encode_lockt(xdr, args, &hdr);
2416         encode_nops(&hdr);
2417 }
2418
2419 /*
2420  * Encode a LOCKU request
2421  */
2422 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2423                                const void *data)
2424 {
2425         const struct nfs_locku_args *args = data;
2426         struct compound_hdr hdr = {
2427                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2428         };
2429
2430         encode_compound_hdr(xdr, req, &hdr);
2431         encode_sequence(xdr, &args->seq_args, &hdr);
2432         encode_putfh(xdr, args->fh, &hdr);
2433         encode_locku(xdr, args, &hdr);
2434         encode_nops(&hdr);
2435 }
2436
2437 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2438                                            struct xdr_stream *xdr,
2439                                            const void *data)
2440 {
2441         const struct nfs_release_lockowner_args *args = data;
2442         struct compound_hdr hdr = {
2443                 .minorversion = 0,
2444         };
2445
2446         encode_compound_hdr(xdr, req, &hdr);
2447         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2448         encode_nops(&hdr);
2449 }
2450
2451 /*
2452  * Encode a READLINK request
2453  */
2454 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2455                                   const void *data)
2456 {
2457         const struct nfs4_readlink *args = data;
2458         struct compound_hdr hdr = {
2459                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2460         };
2461
2462         encode_compound_hdr(xdr, req, &hdr);
2463         encode_sequence(xdr, &args->seq_args, &hdr);
2464         encode_putfh(xdr, args->fh, &hdr);
2465         encode_readlink(xdr, args, req, &hdr);
2466
2467         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2468                         args->pgbase, args->pglen);
2469         encode_nops(&hdr);
2470 }
2471
2472 /*
2473  * Encode a READDIR request
2474  */
2475 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2476                                  const void *data)
2477 {
2478         const struct nfs4_readdir_arg *args = data;
2479         struct compound_hdr hdr = {
2480                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2481         };
2482
2483         encode_compound_hdr(xdr, req, &hdr);
2484         encode_sequence(xdr, &args->seq_args, &hdr);
2485         encode_putfh(xdr, args->fh, &hdr);
2486         encode_readdir(xdr, args, req, &hdr);
2487
2488         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2489                          args->pgbase, args->count);
2490         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2491                         __func__, hdr.replen << 2, args->pages,
2492                         args->pgbase, args->count);
2493         encode_nops(&hdr);
2494 }
2495
2496 /*
2497  * Encode a READ request
2498  */
2499 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2500                               const void *data)
2501 {
2502         const struct nfs_pgio_args *args = data;
2503         struct compound_hdr hdr = {
2504                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2505         };
2506
2507         encode_compound_hdr(xdr, req, &hdr);
2508         encode_sequence(xdr, &args->seq_args, &hdr);
2509         encode_putfh(xdr, args->fh, &hdr);
2510         encode_read(xdr, args, &hdr);
2511
2512         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2513                          args->pages, args->pgbase, args->count);
2514         req->rq_rcv_buf.flags |= XDRBUF_READ;
2515         encode_nops(&hdr);
2516 }
2517
2518 /*
2519  * Encode an SETATTR request
2520  */
2521 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2522                                  const void *data)
2523 {
2524         const struct nfs_setattrargs *args = data;
2525         struct compound_hdr hdr = {
2526                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527         };
2528
2529         encode_compound_hdr(xdr, req, &hdr);
2530         encode_sequence(xdr, &args->seq_args, &hdr);
2531         encode_putfh(xdr, args->fh, &hdr);
2532         encode_setattr(xdr, args, args->server, &hdr);
2533         encode_getfattr(xdr, args->bitmask, &hdr);
2534         encode_nops(&hdr);
2535 }
2536
2537 /*
2538  * Encode a GETACL request
2539  */
2540 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2541                                 const void *data)
2542 {
2543         const struct nfs_getaclargs *args = data;
2544         struct compound_hdr hdr = {
2545                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2546         };
2547         const __u32 nfs4_acl_bitmap[1] = {
2548                 [0] = FATTR4_WORD0_ACL,
2549         };
2550         uint32_t replen;
2551
2552         encode_compound_hdr(xdr, req, &hdr);
2553         encode_sequence(xdr, &args->seq_args, &hdr);
2554         encode_putfh(xdr, args->fh, &hdr);
2555         replen = hdr.replen + op_decode_hdr_maxsz;
2556         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2557                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2558
2559         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2560                 args->acl_pages, 0, args->acl_len);
2561
2562         encode_nops(&hdr);
2563 }
2564
2565 /*
2566  * Encode a WRITE request
2567  */
2568 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2569                                const void *data)
2570 {
2571         const struct nfs_pgio_args *args = data;
2572         struct compound_hdr hdr = {
2573                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2574         };
2575
2576         encode_compound_hdr(xdr, req, &hdr);
2577         encode_sequence(xdr, &args->seq_args, &hdr);
2578         encode_putfh(xdr, args->fh, &hdr);
2579         encode_write(xdr, args, &hdr);
2580         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2581         if (args->bitmask)
2582                 encode_getfattr(xdr, args->bitmask, &hdr);
2583         encode_nops(&hdr);
2584 }
2585
2586 /*
2587  *  a COMMIT request
2588  */
2589 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2590                                 const void *data)
2591 {
2592         const struct nfs_commitargs *args = data;
2593         struct compound_hdr hdr = {
2594                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2595         };
2596
2597         encode_compound_hdr(xdr, req, &hdr);
2598         encode_sequence(xdr, &args->seq_args, &hdr);
2599         encode_putfh(xdr, args->fh, &hdr);
2600         encode_commit(xdr, args, &hdr);
2601         encode_nops(&hdr);
2602 }
2603
2604 /*
2605  * FSINFO request
2606  */
2607 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2608                                 const void *data)
2609 {
2610         const struct nfs4_fsinfo_arg *args = data;
2611         struct compound_hdr hdr = {
2612                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2613         };
2614
2615         encode_compound_hdr(xdr, req, &hdr);
2616         encode_sequence(xdr, &args->seq_args, &hdr);
2617         encode_putfh(xdr, args->fh, &hdr);
2618         encode_fsinfo(xdr, args->bitmask, &hdr);
2619         encode_nops(&hdr);
2620 }
2621
2622 /*
2623  * a PATHCONF request
2624  */
2625 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2626                                   const void *data)
2627 {
2628         const struct nfs4_pathconf_arg *args = data;
2629         struct compound_hdr hdr = {
2630                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2631         };
2632
2633         encode_compound_hdr(xdr, req, &hdr);
2634         encode_sequence(xdr, &args->seq_args, &hdr);
2635         encode_putfh(xdr, args->fh, &hdr);
2636         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2637                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2638         encode_nops(&hdr);
2639 }
2640
2641 /*
2642  * a STATFS request
2643  */
2644 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2645                                 const void *data)
2646 {
2647         const struct nfs4_statfs_arg *args = data;
2648         struct compound_hdr hdr = {
2649                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2650         };
2651
2652         encode_compound_hdr(xdr, req, &hdr);
2653         encode_sequence(xdr, &args->seq_args, &hdr);
2654         encode_putfh(xdr, args->fh, &hdr);
2655         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2656                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2657         encode_nops(&hdr);
2658 }
2659
2660 /*
2661  * GETATTR_BITMAP request
2662  */
2663 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2664                                      struct xdr_stream *xdr,
2665                                      const void *data)
2666 {
2667         const struct nfs4_server_caps_arg *args = data;
2668         const u32 *bitmask = args->bitmask;
2669         struct compound_hdr hdr = {
2670                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2671         };
2672
2673         encode_compound_hdr(xdr, req, &hdr);
2674         encode_sequence(xdr, &args->seq_args, &hdr);
2675         encode_putfh(xdr, args->fhandle, &hdr);
2676         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2677         encode_nops(&hdr);
2678 }
2679
2680 /*
2681  * a RENEW request
2682  */
2683 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2684                                const void *data)
2685
2686 {
2687         const struct nfs_client *clp = data;
2688         struct compound_hdr hdr = {
2689                 .nops   = 0,
2690         };
2691
2692         encode_compound_hdr(xdr, req, &hdr);
2693         encode_renew(xdr, clp->cl_clientid, &hdr);
2694         encode_nops(&hdr);
2695 }
2696
2697 /*
2698  * a SETCLIENTID request
2699  */
2700 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2701                                      struct xdr_stream *xdr,
2702                                      const void *data)
2703 {
2704         const struct nfs4_setclientid *sc = data;
2705         struct compound_hdr hdr = {
2706                 .nops   = 0,
2707         };
2708
2709         encode_compound_hdr(xdr, req, &hdr);
2710         encode_setclientid(xdr, sc, &hdr);
2711         encode_nops(&hdr);
2712 }
2713
2714 /*
2715  * a SETCLIENTID_CONFIRM request
2716  */
2717 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2718                                              struct xdr_stream *xdr,
2719                                              const void *data)
2720 {
2721         const struct nfs4_setclientid_res *arg = data;
2722         struct compound_hdr hdr = {
2723                 .nops   = 0,
2724         };
2725
2726         encode_compound_hdr(xdr, req, &hdr);
2727         encode_setclientid_confirm(xdr, arg, &hdr);
2728         encode_nops(&hdr);
2729 }
2730
2731 /*
2732  * DELEGRETURN request
2733  */
2734 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2735                                      struct xdr_stream *xdr,
2736                                      const void *data)
2737 {
2738         const struct nfs4_delegreturnargs *args = data;
2739         struct compound_hdr hdr = {
2740                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2741         };
2742
2743         encode_compound_hdr(xdr, req, &hdr);
2744         encode_sequence(xdr, &args->seq_args, &hdr);
2745         encode_putfh(xdr, args->fhandle, &hdr);
2746         if (args->lr_args)
2747                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2748         if (args->bitmask)
2749                 encode_getfattr(xdr, args->bitmask, &hdr);
2750         encode_delegreturn(xdr, args->stateid, &hdr);
2751         encode_nops(&hdr);
2752 }
2753
2754 /*
2755  * Encode FS_LOCATIONS request
2756  */
2757 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2758                                       struct xdr_stream *xdr,
2759                                       const void *data)
2760 {
2761         const struct nfs4_fs_locations_arg *args = data;
2762         struct compound_hdr hdr = {
2763                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2764         };
2765         uint32_t replen;
2766
2767         encode_compound_hdr(xdr, req, &hdr);
2768         encode_sequence(xdr, &args->seq_args, &hdr);
2769         if (args->migration) {
2770                 encode_putfh(xdr, args->fh, &hdr);
2771                 replen = hdr.replen;
2772                 encode_fs_locations(xdr, args->bitmask, &hdr);
2773                 if (args->renew)
2774                         encode_renew(xdr, args->clientid, &hdr);
2775         } else {
2776                 encode_putfh(xdr, args->dir_fh, &hdr);
2777                 encode_lookup(xdr, args->name, &hdr);
2778                 replen = hdr.replen;
2779                 encode_fs_locations(xdr, args->bitmask, &hdr);
2780         }
2781
2782         /* Set up reply kvec to capture returned fs_locations array. */
2783         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2784                          (struct page **)&args->page, 0, PAGE_SIZE);
2785         encode_nops(&hdr);
2786 }
2787
2788 /*
2789  * Encode SECINFO request
2790  */
2791 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2792                                 struct xdr_stream *xdr,
2793                                 const void *data)
2794 {
2795         const struct nfs4_secinfo_arg *args = data;
2796         struct compound_hdr hdr = {
2797                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2798         };
2799
2800         encode_compound_hdr(xdr, req, &hdr);
2801         encode_sequence(xdr, &args->seq_args, &hdr);
2802         encode_putfh(xdr, args->dir_fh, &hdr);
2803         encode_secinfo(xdr, args->name, &hdr);
2804         encode_nops(&hdr);
2805 }
2806
2807 /*
2808  * Encode FSID_PRESENT request
2809  */
2810 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2811                                       struct xdr_stream *xdr,
2812                                       const void *data)
2813 {
2814         const struct nfs4_fsid_present_arg *args = data;
2815         struct compound_hdr hdr = {
2816                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2817         };
2818
2819         encode_compound_hdr(xdr, req, &hdr);
2820         encode_sequence(xdr, &args->seq_args, &hdr);
2821         encode_putfh(xdr, args->fh, &hdr);
2822         encode_getfh(xdr, &hdr);
2823         if (args->renew)
2824                 encode_renew(xdr, args->clientid, &hdr);
2825         encode_nops(&hdr);
2826 }
2827
2828 #if defined(CONFIG_NFS_V4_1)
2829 /*
2830  * BIND_CONN_TO_SESSION request
2831  */
2832 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2833                                 struct xdr_stream *xdr,
2834                                 const void *data)
2835 {
2836         const struct nfs41_bind_conn_to_session_args *args = data;
2837         struct compound_hdr hdr = {
2838                 .minorversion = args->client->cl_mvops->minor_version,
2839         };
2840
2841         encode_compound_hdr(xdr, req, &hdr);
2842         encode_bind_conn_to_session(xdr, args, &hdr);
2843         encode_nops(&hdr);
2844 }
2845
2846 /*
2847  * EXCHANGE_ID request
2848  */
2849 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2850                                      struct xdr_stream *xdr,
2851                                      const void *data)
2852 {
2853         const struct nfs41_exchange_id_args *args = data;
2854         struct compound_hdr hdr = {
2855                 .minorversion = args->client->cl_mvops->minor_version,
2856         };
2857
2858         encode_compound_hdr(xdr, req, &hdr);
2859         encode_exchange_id(xdr, args, &hdr);
2860         encode_nops(&hdr);
2861 }
2862
2863 /*
2864  * a CREATE_SESSION request
2865  */
2866 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2867                                         struct xdr_stream *xdr,
2868                                         const void *data)
2869 {
2870         const struct nfs41_create_session_args *args = data;
2871         struct compound_hdr hdr = {
2872                 .minorversion = args->client->cl_mvops->minor_version,
2873         };
2874
2875         encode_compound_hdr(xdr, req, &hdr);
2876         encode_create_session(xdr, args, &hdr);
2877         encode_nops(&hdr);
2878 }
2879
2880 /*
2881  * a DESTROY_SESSION request
2882  */
2883 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2884                                          struct xdr_stream *xdr,
2885                                          const void *data)
2886 {
2887         const struct nfs4_session *session = data;
2888         struct compound_hdr hdr = {
2889                 .minorversion = session->clp->cl_mvops->minor_version,
2890         };
2891
2892         encode_compound_hdr(xdr, req, &hdr);
2893         encode_destroy_session(xdr, session, &hdr);
2894         encode_nops(&hdr);
2895 }
2896
2897 /*
2898  * a DESTROY_CLIENTID request
2899  */
2900 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2901                                          struct xdr_stream *xdr,
2902                                          const void *data)
2903 {
2904         const struct nfs_client *clp = data;
2905         struct compound_hdr hdr = {
2906                 .minorversion = clp->cl_mvops->minor_version,
2907         };
2908
2909         encode_compound_hdr(xdr, req, &hdr);
2910         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2911         encode_nops(&hdr);
2912 }
2913
2914 /*
2915  * a SEQUENCE request
2916  */
2917 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2918                                   const void *data)
2919 {
2920         const struct nfs4_sequence_args *args = data;
2921         struct compound_hdr hdr = {
2922                 .minorversion = nfs4_xdr_minorversion(args),
2923         };
2924
2925         encode_compound_hdr(xdr, req, &hdr);
2926         encode_sequence(xdr, args, &hdr);
2927         encode_nops(&hdr);
2928 }
2929
2930 /*
2931  * a GET_LEASE_TIME request
2932  */
2933 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2934                                         struct xdr_stream *xdr,
2935                                         const void *data)
2936 {
2937         const struct nfs4_get_lease_time_args *args = data;
2938         struct compound_hdr hdr = {
2939                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2940         };
2941         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2942
2943         encode_compound_hdr(xdr, req, &hdr);
2944         encode_sequence(xdr, &args->la_seq_args, &hdr);
2945         encode_putrootfh(xdr, &hdr);
2946         encode_fsinfo(xdr, lease_bitmap, &hdr);
2947         encode_nops(&hdr);
2948 }
2949
2950 /*
2951  * a RECLAIM_COMPLETE request
2952  */
2953 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2954                                           struct xdr_stream *xdr,
2955                                           const void *data)
2956 {
2957         const struct nfs41_reclaim_complete_args *args = data;
2958         struct compound_hdr hdr = {
2959                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2960         };
2961
2962         encode_compound_hdr(xdr, req, &hdr);
2963         encode_sequence(xdr, &args->seq_args, &hdr);
2964         encode_reclaim_complete(xdr, args, &hdr);
2965         encode_nops(&hdr);
2966 }
2967
2968 /*
2969  * Encode GETDEVICEINFO request
2970  */
2971 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2972                                        struct xdr_stream *xdr,
2973                                        const void *data)
2974 {
2975         const struct nfs4_getdeviceinfo_args *args = data;
2976         struct compound_hdr hdr = {
2977                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2978         };
2979
2980         encode_compound_hdr(xdr, req, &hdr);
2981         encode_sequence(xdr, &args->seq_args, &hdr);
2982         encode_getdeviceinfo(xdr, args, &hdr);
2983
2984         /* set up reply kvec. Subtract notification bitmap max size (2)
2985          * so that notification bitmap is put in xdr_buf tail */
2986         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2987                          args->pdev->pages, args->pdev->pgbase,
2988                          args->pdev->pglen);
2989
2990         encode_nops(&hdr);
2991 }
2992
2993 /*
2994  *  Encode LAYOUTGET request
2995  */
2996 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2997                                    struct xdr_stream *xdr,
2998                                    const void *data)
2999 {
3000         const struct nfs4_layoutget_args *args = data;
3001         struct compound_hdr hdr = {
3002                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3003         };
3004
3005         encode_compound_hdr(xdr, req, &hdr);
3006         encode_sequence(xdr, &args->seq_args, &hdr);
3007         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3008         encode_layoutget(xdr, args, &hdr);
3009
3010         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3011             args->layout.pages, 0, args->layout.pglen);
3012
3013         encode_nops(&hdr);
3014 }
3015
3016 /*
3017  *  Encode LAYOUTCOMMIT request
3018  */
3019 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3020                                       struct xdr_stream *xdr,
3021                                       const void *priv)
3022 {
3023         const struct nfs4_layoutcommit_args *args = priv;
3024         struct nfs4_layoutcommit_data *data =
3025                 container_of(args, struct nfs4_layoutcommit_data, args);
3026         struct compound_hdr hdr = {
3027                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3028         };
3029
3030         encode_compound_hdr(xdr, req, &hdr);
3031         encode_sequence(xdr, &args->seq_args, &hdr);
3032         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3033         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3034         encode_getfattr(xdr, args->bitmask, &hdr);
3035         encode_nops(&hdr);
3036 }
3037
3038 /*
3039  * Encode LAYOUTRETURN request
3040  */
3041 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3042                                       struct xdr_stream *xdr,
3043                                       const void *data)
3044 {
3045         const struct nfs4_layoutreturn_args *args = data;
3046         struct compound_hdr hdr = {
3047                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3048         };
3049
3050         encode_compound_hdr(xdr, req, &hdr);
3051         encode_sequence(xdr, &args->seq_args, &hdr);
3052         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3053         encode_layoutreturn(xdr, args, &hdr);
3054         encode_nops(&hdr);
3055 }
3056
3057 /*
3058  * Encode SECINFO_NO_NAME request
3059  */
3060 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3061                                         struct xdr_stream *xdr,
3062                                         const void *data)
3063 {
3064         const struct nfs41_secinfo_no_name_args *args = data;
3065         struct compound_hdr hdr = {
3066                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3067         };
3068
3069         encode_compound_hdr(xdr, req, &hdr);
3070         encode_sequence(xdr, &args->seq_args, &hdr);
3071         encode_putrootfh(xdr, &hdr);
3072         encode_secinfo_no_name(xdr, args, &hdr);
3073         encode_nops(&hdr);
3074 }
3075
3076 /*
3077  *  Encode TEST_STATEID request
3078  */
3079 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3080                                       struct xdr_stream *xdr,
3081                                       const void *data)
3082 {
3083         const struct nfs41_test_stateid_args *args = data;
3084         struct compound_hdr hdr = {
3085                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3086         };
3087
3088         encode_compound_hdr(xdr, req, &hdr);
3089         encode_sequence(xdr, &args->seq_args, &hdr);
3090         encode_test_stateid(xdr, args, &hdr);
3091         encode_nops(&hdr);
3092 }
3093
3094 /*
3095  *  Encode FREE_STATEID request
3096  */
3097 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3098                                      struct xdr_stream *xdr,
3099                                      const void *data)
3100 {
3101         const struct nfs41_free_stateid_args *args = data;
3102         struct compound_hdr hdr = {
3103                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3104         };
3105
3106         encode_compound_hdr(xdr, req, &hdr);
3107         encode_sequence(xdr, &args->seq_args, &hdr);
3108         encode_free_stateid(xdr, args, &hdr);
3109         encode_nops(&hdr);
3110 }
3111 #endif /* CONFIG_NFS_V4_1 */
3112
3113 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3114 {
3115         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3116                 "Remaining buffer length is %tu words.\n",
3117                 func, xdr->end - xdr->p);
3118 }
3119
3120 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3121 {
3122         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3123                         NFS4_OPAQUE_LIMIT);
3124         if (unlikely(ret < 0)) {
3125                 if (ret == -EBADMSG)
3126                         print_overflow_msg(__func__, xdr);
3127                 return -EIO;
3128         }
3129         *len = ret;
3130         return 0;
3131 }
3132
3133 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3134 {
3135         __be32 *p;
3136
3137         p = xdr_inline_decode(xdr, 8);
3138         if (unlikely(!p))
3139                 goto out_overflow;
3140         hdr->status = be32_to_cpup(p++);
3141         hdr->taglen = be32_to_cpup(p);
3142
3143         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3144         if (unlikely(!p))
3145                 goto out_overflow;
3146         hdr->tag = (char *)p;
3147         p += XDR_QUADLEN(hdr->taglen);
3148         hdr->nops = be32_to_cpup(p);
3149         if (unlikely(hdr->nops < 1))
3150                 return nfs4_stat_to_errno(hdr->status);
3151         return 0;
3152 out_overflow:
3153         print_overflow_msg(__func__, xdr);
3154         return -EIO;
3155 }
3156
3157 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3158                 int *nfs_retval)
3159 {
3160         __be32 *p;
3161         uint32_t opnum;
3162         int32_t nfserr;
3163
3164         p = xdr_inline_decode(xdr, 8);
3165         if (unlikely(!p))
3166                 goto out_overflow;
3167         opnum = be32_to_cpup(p++);
3168         if (unlikely(opnum != expected))
3169                 goto out_bad_operation;
3170         nfserr = be32_to_cpup(p);
3171         if (nfserr == NFS_OK)
3172                 *nfs_retval = 0;
3173         else
3174                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3175         return true;
3176 out_bad_operation:
3177         dprintk("nfs: Server returned operation"
3178                 " %d but we issued a request for %d\n",
3179                         opnum, expected);
3180         *nfs_retval = -EREMOTEIO;
3181         return false;
3182 out_overflow:
3183         print_overflow_msg(__func__, xdr);
3184         *nfs_retval = -EIO;
3185         return false;
3186 }
3187
3188 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3189 {
3190         int retval;
3191
3192         __decode_op_hdr(xdr, expected, &retval);
3193         return retval;
3194 }
3195
3196 /* Dummy routine */
3197 static int decode_ace(struct xdr_stream *xdr, void *ace)
3198 {
3199         __be32 *p;
3200         unsigned int strlen;
3201         char *str;
3202
3203         p = xdr_inline_decode(xdr, 12);
3204         if (likely(p))
3205                 return decode_opaque_inline(xdr, &strlen, &str);
3206         print_overflow_msg(__func__, xdr);
3207         return -EIO;
3208 }
3209
3210 static ssize_t
3211 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3212 {
3213         ssize_t ret;
3214
3215         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3216         if (likely(ret >= 0))
3217                 return ret;
3218         if (ret == -EMSGSIZE)
3219                 return sz;
3220         print_overflow_msg(__func__, xdr);
3221         return -EIO;
3222 }
3223
3224 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3225 {
3226         ssize_t ret;
3227         ret = decode_bitmap4(xdr, bitmap, 3);
3228         return ret < 0 ? ret : 0;
3229 }
3230
3231 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3232 {
3233         __be32 *p;
3234
3235         p = xdr_inline_decode(xdr, 4);
3236         if (unlikely(!p))
3237                 goto out_overflow;
3238         *attrlen = be32_to_cpup(p);
3239         *savep = xdr_stream_pos(xdr);
3240         return 0;
3241 out_overflow:
3242         print_overflow_msg(__func__, xdr);
3243         return -EIO;
3244 }
3245
3246 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3247 {
3248         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3249                 int ret;
3250                 ret = decode_attr_bitmap(xdr, bitmask);
3251                 if (unlikely(ret < 0))
3252                         return ret;
3253                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3254         } else
3255                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3256         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3257                 bitmask[0], bitmask[1], bitmask[2]);
3258         return 0;
3259 }
3260
3261 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3262 {
3263         __be32 *p;
3264         int ret = 0;
3265
3266         *type = 0;
3267         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3268                 return -EIO;
3269         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3270                 p = xdr_inline_decode(xdr, 4);
3271                 if (unlikely(!p))
3272                         goto out_overflow;
3273                 *type = be32_to_cpup(p);
3274                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3275                         dprintk("%s: bad type %d\n", __func__, *type);
3276                         return -EIO;
3277                 }
3278                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3279                 ret = NFS_ATTR_FATTR_TYPE;
3280         }
3281         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3282         return ret;
3283 out_overflow:
3284         print_overflow_msg(__func__, xdr);
3285         return -EIO;
3286 }
3287
3288 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3289                                       uint32_t *bitmap, uint32_t *type)
3290 {
3291         __be32 *p;
3292
3293         *type = 0;
3294         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3295                 return -EIO;
3296         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3297                 p = xdr_inline_decode(xdr, 4);
3298                 if (unlikely(!p))
3299                         goto out_overflow;
3300                 *type = be32_to_cpup(p);
3301                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3302         }
3303         dprintk("%s: expire type=0x%x\n", __func__, *type);
3304         return 0;
3305 out_overflow:
3306         print_overflow_msg(__func__, xdr);
3307         return -EIO;
3308 }
3309
3310 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3311 {
3312         __be32 *p;
3313         int ret = 0;
3314
3315         *change = 0;
3316         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3317                 return -EIO;
3318         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3319                 p = xdr_inline_decode(xdr, 8);
3320                 if (unlikely(!p))
3321                         goto out_overflow;
3322                 xdr_decode_hyper(p, change);
3323                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3324                 ret = NFS_ATTR_FATTR_CHANGE;
3325         }
3326         dprintk("%s: change attribute=%Lu\n", __func__,
3327                         (unsigned long long)*change);
3328         return ret;
3329 out_overflow:
3330         print_overflow_msg(__func__, xdr);
3331         return -EIO;
3332 }
3333
3334 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3335 {
3336         __be32 *p;
3337         int ret = 0;
3338
3339         *size = 0;
3340         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3341                 return -EIO;
3342         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3343                 p = xdr_inline_decode(xdr, 8);
3344                 if (unlikely(!p))
3345                         goto out_overflow;
3346                 xdr_decode_hyper(p, size);
3347                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3348                 ret = NFS_ATTR_FATTR_SIZE;
3349         }
3350         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3351         return ret;
3352 out_overflow:
3353         print_overflow_msg(__func__, xdr);
3354         return -EIO;
3355 }
3356
3357 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3358 {
3359         __be32 *p;
3360
3361         *res = 0;
3362         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3363                 return -EIO;
3364         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3365                 p = xdr_inline_decode(xdr, 4);
3366                 if (unlikely(!p))
3367                         goto out_overflow;
3368                 *res = be32_to_cpup(p);
3369                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3370         }
3371         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3372         return 0;
3373 out_overflow:
3374         print_overflow_msg(__func__, xdr);
3375         return -EIO;
3376 }
3377
3378 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3379 {
3380         __be32 *p;
3381
3382         *res = 0;
3383         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3384                 return -EIO;
3385         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3386                 p = xdr_inline_decode(xdr, 4);
3387                 if (unlikely(!p))
3388                         goto out_overflow;
3389                 *res = be32_to_cpup(p);
3390                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3391         }
3392         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3393         return 0;
3394 out_overflow:
3395         print_overflow_msg(__func__, xdr);
3396         return -EIO;
3397 }
3398
3399 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3400 {
3401         __be32 *p;
3402         int ret = 0;
3403
3404         fsid->major = 0;
3405         fsid->minor = 0;
3406         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3407                 return -EIO;
3408         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3409                 p = xdr_inline_decode(xdr, 16);
3410                 if (unlikely(!p))
3411                         goto out_overflow;
3412                 p = xdr_decode_hyper(p, &fsid->major);
3413                 xdr_decode_hyper(p, &fsid->minor);
3414                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3415                 ret = NFS_ATTR_FATTR_FSID;
3416         }
3417         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3418                         (unsigned long long)fsid->major,
3419                         (unsigned long long)fsid->minor);
3420         return ret;
3421 out_overflow:
3422         print_overflow_msg(__func__, xdr);
3423         return -EIO;
3424 }
3425
3426 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3427 {
3428         __be32 *p;
3429
3430         *res = 60;
3431         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3432                 return -EIO;
3433         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3434                 p = xdr_inline_decode(xdr, 4);
3435                 if (unlikely(!p))
3436                         goto out_overflow;
3437                 *res = be32_to_cpup(p);
3438                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3439         }
3440         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3441         return 0;
3442 out_overflow:
3443         print_overflow_msg(__func__, xdr);
3444         return -EIO;
3445 }
3446
3447 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3448 {
3449         __be32 *p;
3450
3451         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3452                 return -EIO;
3453         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3454                 p = xdr_inline_decode(xdr, 4);
3455                 if (unlikely(!p))
3456                         goto out_overflow;
3457                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3458                 *res = -be32_to_cpup(p);
3459         }
3460         return 0;
3461 out_overflow:
3462         print_overflow_msg(__func__, xdr);
3463         return -EIO;
3464 }
3465
3466 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3467                                  uint32_t *bitmap, uint32_t *bitmask)
3468 {
3469         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3470                 int ret;
3471                 ret = decode_attr_bitmap(xdr, bitmask);
3472                 if (unlikely(ret < 0))
3473                         return ret;
3474                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3475         } else
3476                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3477         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3478                 bitmask[0], bitmask[1], bitmask[2]);
3479         return 0;
3480 }
3481
3482 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3483 {
3484         __be32 *p;
3485         int len;
3486
3487         if (fh != NULL)
3488                 memset(fh, 0, sizeof(*fh));
3489
3490         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3491                 return -EIO;
3492         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3493                 p = xdr_inline_decode(xdr, 4);
3494                 if (unlikely(!p))
3495                         goto out_overflow;
3496                 len = be32_to_cpup(p);
3497                 if (len > NFS4_FHSIZE)
3498                         return -EIO;
3499                 p = xdr_inline_decode(xdr, len);
3500                 if (unlikely(!p))
3501                         goto out_overflow;
3502                 if (fh != NULL) {
3503                         memcpy(fh->data, p, len);
3504                         fh->size = len;
3505                 }
3506                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3507         }
3508         return 0;
3509 out_overflow:
3510         print_overflow_msg(__func__, xdr);
3511         return -EIO;
3512 }
3513
3514 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3515 {
3516         __be32 *p;
3517
3518         *res = 0;
3519         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3520                 return -EIO;
3521         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3522                 p = xdr_inline_decode(xdr, 4);
3523                 if (unlikely(!p))
3524                         goto out_overflow;
3525                 *res = be32_to_cpup(p);
3526                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3527         }
3528         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3529         return 0;
3530 out_overflow:
3531         print_overflow_msg(__func__, xdr);
3532         return -EIO;
3533 }
3534
3535 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3536 {
3537         __be32 *p;
3538         int ret = 0;
3539
3540         *fileid = 0;
3541         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3542                 return -EIO;
3543         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3544                 p = xdr_inline_decode(xdr, 8);
3545                 if (unlikely(!p))
3546                         goto out_overflow;
3547                 xdr_decode_hyper(p, fileid);
3548                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3549                 ret = NFS_ATTR_FATTR_FILEID;
3550         }
3551         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3552         return ret;
3553 out_overflow:
3554         print_overflow_msg(__func__, xdr);
3555         return -EIO;
3556 }
3557
3558 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3559 {
3560         __be32 *p;
3561         int ret = 0;
3562
3563         *fileid = 0;
3564         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3565                 return -EIO;
3566         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3567                 p = xdr_inline_decode(xdr, 8);
3568                 if (unlikely(!p))
3569                         goto out_overflow;
3570                 xdr_decode_hyper(p, fileid);
3571                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3572                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3573         }
3574         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3575         return ret;
3576 out_overflow:
3577         print_overflow_msg(__func__, xdr);
3578         return -EIO;
3579 }
3580
3581 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3582 {
3583         __be32 *p;
3584         int status = 0;
3585
3586         *res = 0;
3587         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3588                 return -EIO;
3589         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3590                 p = xdr_inline_decode(xdr, 8);
3591                 if (unlikely(!p))
3592                         goto out_overflow;
3593                 xdr_decode_hyper(p, res);
3594                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3595         }
3596         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3597         return status;
3598 out_overflow:
3599         print_overflow_msg(__func__, xdr);
3600         return -EIO;
3601 }
3602
3603 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3604 {
3605         __be32 *p;
3606         int status = 0;
3607
3608         *res = 0;
3609         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3610                 return -EIO;
3611         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3612                 p = xdr_inline_decode(xdr, 8);
3613                 if (unlikely(!p))
3614                         goto out_overflow;
3615                 xdr_decode_hyper(p, res);
3616                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3617         }
3618         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3619         return status;
3620 out_overflow:
3621         print_overflow_msg(__func__, xdr);
3622         return -EIO;
3623 }
3624
3625 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3626 {
3627         __be32 *p;
3628         int status = 0;
3629
3630         *res = 0;
3631         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3632                 return -EIO;
3633         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3634                 p = xdr_inline_decode(xdr, 8);
3635                 if (unlikely(!p))
3636                         goto out_overflow;
3637                 xdr_decode_hyper(p, res);
3638                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3639         }
3640         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3641         return status;
3642 out_overflow:
3643         print_overflow_msg(__func__, xdr);
3644         return -EIO;
3645 }
3646
3647 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3648 {
3649         u32 n;
3650         __be32 *p;
3651         int status = 0;
3652
3653         p = xdr_inline_decode(xdr, 4);
3654         if (unlikely(!p))
3655                 goto out_overflow;
3656         n = be32_to_cpup(p);
3657         if (n == 0)
3658                 goto root_path;
3659         dprintk("pathname4: ");
3660         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3661                 dprintk("cannot parse %d components in path\n", n);
3662                 goto out_eio;
3663         }
3664         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3665                 struct nfs4_string *component = &path->components[path->ncomponents];
3666                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3667                 if (unlikely(status != 0))
3668                         goto out_eio;
3669                 ifdebug (XDR)
3670                         pr_cont("%s%.*s ",
3671                                 (path->ncomponents != n ? "/ " : ""),
3672                                 component->len, component->data);
3673         }
3674 out:
3675         return status;
3676 root_path:
3677 /* a root pathname is sent as a zero component4 */
3678         path->ncomponents = 1;
3679         path->components[0].len=0;
3680         path->components[0].data=NULL;
3681         dprintk("pathname4: /\n");
3682         goto out;
3683 out_eio:
3684         dprintk(" status %d", status);
3685         status = -EIO;
3686         goto out;
3687 out_overflow:
3688         print_overflow_msg(__func__, xdr);
3689         return -EIO;
3690 }
3691
3692 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3693 {
3694         int n;
3695         __be32 *p;
3696         int status = -EIO;
3697
3698         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3699                 goto out;
3700         status = 0;
3701         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3702                 goto out;
3703         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3704         status = -EIO;
3705         /* Ignore borken servers that return unrequested attrs */
3706         if (unlikely(res == NULL))
3707                 goto out;
3708         dprintk("%s: fsroot:\n", __func__);
3709         status = decode_pathname(xdr, &res->fs_path);
3710         if (unlikely(status != 0))
3711                 goto out;
3712         p = xdr_inline_decode(xdr, 4);
3713         if (unlikely(!p))
3714                 goto out_overflow;
3715         n = be32_to_cpup(p);
3716         if (n <= 0)
3717                 goto out_eio;
3718         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3719                 u32 m;
3720                 struct nfs4_fs_location *loc;
3721
3722                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3723                         break;
3724                 loc = &res->locations[res->nlocations];
3725                 p = xdr_inline_decode(xdr, 4);
3726                 if (unlikely(!p))
3727                         goto out_overflow;
3728                 m = be32_to_cpup(p);
3729
3730                 dprintk("%s: servers:\n", __func__);
3731                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3732                         struct nfs4_string *server;
3733
3734                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3735                                 unsigned int i;
3736                                 dprintk("%s: using first %u of %u servers "
3737                                         "returned for location %u\n",
3738                                                 __func__,
3739                                                 NFS4_FS_LOCATION_MAXSERVERS,
3740                                                 m, res->nlocations);
3741                                 for (i = loc->nservers; i < m; i++) {
3742                                         unsigned int len;
3743                                         char *data;
3744                                         status = decode_opaque_inline(xdr, &len, &data);
3745                                         if (unlikely(status != 0))
3746                                                 goto out_eio;
3747                                 }
3748                                 break;
3749                         }
3750                         server = &loc->servers[loc->nservers];
3751                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3752                         if (unlikely(status != 0))
3753                                 goto out_eio;
3754                         dprintk("%s ", server->data);
3755                 }
3756                 status = decode_pathname(xdr, &loc->rootpath);
3757                 if (unlikely(status != 0))
3758                         goto out_eio;
3759         }
3760         if (res->nlocations != 0)
3761                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3762 out:
3763         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3764         return status;
3765 out_overflow:
3766         print_overflow_msg(__func__, xdr);
3767 out_eio:
3768         status = -EIO;
3769         goto out;
3770 }
3771
3772 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3773 {
3774         __be32 *p;
3775         int status = 0;
3776
3777         *res = 0;
3778         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3779                 return -EIO;
3780         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3781                 p = xdr_inline_decode(xdr, 8);
3782                 if (unlikely(!p))
3783                         goto out_overflow;
3784                 xdr_decode_hyper(p, res);
3785                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3786         }
3787         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3788         return status;
3789 out_overflow:
3790         print_overflow_msg(__func__, xdr);
3791         return -EIO;
3792 }
3793
3794 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3795 {
3796         __be32 *p;
3797         int status = 0;
3798
3799         *maxlink = 1;
3800         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3801                 return -EIO;
3802         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3803                 p = xdr_inline_decode(xdr, 4);
3804                 if (unlikely(!p))
3805                         goto out_overflow;
3806                 *maxlink = be32_to_cpup(p);
3807                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3808         }
3809         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3810         return status;
3811 out_overflow:
3812         print_overflow_msg(__func__, xdr);
3813         return -EIO;
3814 }
3815
3816 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3817 {
3818         __be32 *p;
3819         int status = 0;
3820
3821         *maxname = 1024;
3822         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3823                 return -EIO;
3824         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3825                 p = xdr_inline_decode(xdr, 4);
3826                 if (unlikely(!p))
3827                         goto out_overflow;
3828                 *maxname = be32_to_cpup(p);
3829                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3830         }
3831         dprintk("%s: maxname=%u\n", __func__, *maxname);
3832         return status;
3833 out_overflow:
3834         print_overflow_msg(__func__, xdr);
3835         return -EIO;
3836 }
3837
3838 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3839 {
3840         __be32 *p;
3841         int status = 0;
3842
3843         *res = 1024;
3844         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3845                 return -EIO;
3846         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3847                 uint64_t maxread;
3848                 p = xdr_inline_decode(xdr, 8);
3849                 if (unlikely(!p))
3850                         goto out_overflow;
3851                 xdr_decode_hyper(p, &maxread);
3852                 if (maxread > 0x7FFFFFFF)
3853                         maxread = 0x7FFFFFFF;
3854                 *res = (uint32_t)maxread;
3855                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3856         }
3857         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3858         return status;
3859 out_overflow:
3860         print_overflow_msg(__func__, xdr);
3861         return -EIO;
3862 }
3863
3864 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3865 {
3866         __be32 *p;
3867         int status = 0;
3868
3869         *res = 1024;
3870         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3871                 return -EIO;
3872         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3873                 uint64_t maxwrite;
3874                 p = xdr_inline_decode(xdr, 8);
3875                 if (unlikely(!p))
3876                         goto out_overflow;
3877                 xdr_decode_hyper(p, &maxwrite);
3878                 if (maxwrite > 0x7FFFFFFF)
3879                         maxwrite = 0x7FFFFFFF;
3880                 *res = (uint32_t)maxwrite;
3881                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3882         }
3883         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3884         return status;
3885 out_overflow:
3886         print_overflow_msg(__func__, xdr);
3887         return -EIO;
3888 }
3889
3890 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3891 {
3892         uint32_t tmp;
3893         __be32 *p;
3894         int ret = 0;
3895
3896         *mode = 0;
3897         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3898                 return -EIO;
3899         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3900                 p = xdr_inline_decode(xdr, 4);
3901                 if (unlikely(!p))
3902                         goto out_overflow;
3903                 tmp = be32_to_cpup(p);
3904                 *mode = tmp & ~S_IFMT;
3905                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3906                 ret = NFS_ATTR_FATTR_MODE;
3907         }
3908         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3909         return ret;
3910 out_overflow:
3911         print_overflow_msg(__func__, xdr);
3912         return -EIO;
3913 }
3914
3915 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3916 {
3917         __be32 *p;
3918         int ret = 0;
3919
3920         *nlink = 1;
3921         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3922                 return -EIO;
3923         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3924                 p = xdr_inline_decode(xdr, 4);
3925                 if (unlikely(!p))
3926                         goto out_overflow;
3927                 *nlink = be32_to_cpup(p);
3928                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3929                 ret = NFS_ATTR_FATTR_NLINK;
3930         }
3931         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3932         return ret;
3933 out_overflow:
3934         print_overflow_msg(__func__, xdr);
3935         return -EIO;
3936 }
3937
3938 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3939                 struct nfs4_string *name, gfp_t gfp_flags)
3940 {
3941         ssize_t ret;
3942
3943         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3944                         XDR_MAX_NETOBJ, gfp_flags);
3945         name->len = 0;
3946         if (ret > 0)
3947                 name->len = ret;
3948         return ret;
3949 }
3950
3951 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3952                 const struct nfs_server *server, kuid_t *uid,
3953                 struct nfs4_string *owner_name)
3954 {
3955         ssize_t len;
3956         char *p;
3957
3958         *uid = make_kuid(&init_user_ns, -2);
3959         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3960                 return -EIO;
3961         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3962                 return 0;
3963         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3964
3965         if (owner_name != NULL) {
3966                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3967                 if (len <= 0)
3968                         goto out;
3969                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3970                 return NFS_ATTR_FATTR_OWNER_NAME;
3971         } else {
3972                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3973                                 XDR_MAX_NETOBJ);
3974                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3975                         goto out;
3976                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3977                 return NFS_ATTR_FATTR_OWNER;
3978         }
3979 out:
3980         if (len != -EBADMSG)
3981                 return 0;
3982         print_overflow_msg(__func__, xdr);
3983         return -EIO;
3984 }
3985
3986 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3987                 const struct nfs_server *server, kgid_t *gid,
3988                 struct nfs4_string *group_name)
3989 {
3990         ssize_t len;
3991         char *p;
3992
3993         *gid = make_kgid(&init_user_ns, -2);
3994         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3995                 return -EIO;
3996         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3997                 return 0;
3998         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3999
4000         if (group_name != NULL) {
4001                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4002                 if (len <= 0)
4003                         goto out;
4004                 dprintk("%s: name=%s\n", __func__, group_name->data);
4005                 return NFS_ATTR_FATTR_GROUP_NAME;
4006         } else {
4007                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4008                                 XDR_MAX_NETOBJ);
4009                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4010                         goto out;
4011                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4012                 return NFS_ATTR_FATTR_GROUP;
4013         }
4014 out:
4015         if (len != -EBADMSG)
4016                 return 0;
4017         print_overflow_msg(__func__, xdr);
4018         return -EIO;
4019 }
4020
4021 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4022 {
4023         uint32_t major = 0, minor = 0;
4024         __be32 *p;
4025         int ret = 0;
4026
4027         *rdev = MKDEV(0,0);
4028         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4029                 return -EIO;
4030         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4031                 dev_t tmp;
4032
4033                 p = xdr_inline_decode(xdr, 8);
4034                 if (unlikely(!p))
4035                         goto out_overflow;
4036                 major = be32_to_cpup(p++);
4037                 minor = be32_to_cpup(p);
4038                 tmp = MKDEV(major, minor);
4039                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4040                         *rdev = tmp;
4041                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4042                 ret = NFS_ATTR_FATTR_RDEV;
4043         }
4044         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4045         return ret;
4046 out_overflow:
4047         print_overflow_msg(__func__, xdr);
4048         return -EIO;
4049 }
4050
4051 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4052 {
4053         __be32 *p;
4054         int status = 0;
4055
4056         *res = 0;
4057         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4058                 return -EIO;
4059         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4060                 p = xdr_inline_decode(xdr, 8);
4061                 if (unlikely(!p))
4062                         goto out_overflow;
4063                 xdr_decode_hyper(p, res);
4064                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4065         }
4066         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4067         return status;
4068 out_overflow:
4069         print_overflow_msg(__func__, xdr);
4070         return -EIO;
4071 }
4072
4073 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4074 {
4075         __be32 *p;
4076         int status = 0;
4077
4078         *res = 0;
4079         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4080                 return -EIO;
4081         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4082                 p = xdr_inline_decode(xdr, 8);
4083                 if (unlikely(!p))
4084                         goto out_overflow;
4085                 xdr_decode_hyper(p, res);
4086                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4087         }
4088         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4089         return status;
4090 out_overflow:
4091         print_overflow_msg(__func__, xdr);
4092         return -EIO;
4093 }
4094
4095 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4096 {
4097         __be32 *p;
4098         int status = 0;
4099
4100         *res = 0;
4101         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4102                 return -EIO;
4103         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4104                 p = xdr_inline_decode(xdr, 8);
4105                 if (unlikely(!p))
4106                         goto out_overflow;
4107                 xdr_decode_hyper(p, res);
4108                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4109         }
4110         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4111         return status;
4112 out_overflow:
4113         print_overflow_msg(__func__, xdr);
4114         return -EIO;
4115 }
4116
4117 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4118 {
4119         __be32 *p;
4120         int ret = 0;
4121
4122         *used = 0;
4123         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4124                 return -EIO;
4125         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4126                 p = xdr_inline_decode(xdr, 8);
4127                 if (unlikely(!p))
4128                         goto out_overflow;
4129                 xdr_decode_hyper(p, used);
4130                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4131                 ret = NFS_ATTR_FATTR_SPACE_USED;
4132         }
4133         dprintk("%s: space used=%Lu\n", __func__,
4134                         (unsigned long long)*used);
4135         return ret;
4136 out_overflow:
4137         print_overflow_msg(__func__, xdr);
4138         return -EIO;
4139 }
4140
4141 static __be32 *
4142 xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4143 {
4144         __u64 sec;
4145
4146         p = xdr_decode_hyper(p, &sec);
4147         t-> tv_sec = (time_t)sec;
4148         t->tv_nsec = be32_to_cpup(p++);
4149         return p;
4150 }
4151
4152 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4153 {
4154         __be32 *p;
4155
4156         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4157         if (unlikely(!p))
4158                 goto out_overflow;
4159         xdr_decode_nfstime4(p, time);
4160         return 0;
4161 out_overflow:
4162         print_overflow_msg(__func__, xdr);
4163         return -EIO;
4164 }
4165
4166 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4167 {
4168         int status = 0;
4169
4170         time->tv_sec = 0;
4171         time->tv_nsec = 0;
4172         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4173                 return -EIO;
4174         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4175                 status = decode_attr_time(xdr, time);
4176                 if (status == 0)
4177                         status = NFS_ATTR_FATTR_ATIME;
4178                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4179         }
4180         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4181         return status;
4182 }
4183
4184 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4185 {
4186         int status = 0;
4187
4188         time->tv_sec = 0;
4189         time->tv_nsec = 0;
4190         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4191                 return -EIO;
4192         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4193                 status = decode_attr_time(xdr, time);
4194                 if (status == 0)
4195                         status = NFS_ATTR_FATTR_CTIME;
4196                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4197         }
4198         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4199         return status;
4200 }
4201
4202 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4203                                   struct timespec *time)
4204 {
4205         int status = 0;
4206
4207         time->tv_sec = 0;
4208         time->tv_nsec = 0;
4209         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4210                 return -EIO;
4211         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4212                 status = decode_attr_time(xdr, time);
4213                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4214         }
4215         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4216                 (long)time->tv_nsec);
4217         return status;
4218 }
4219
4220 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4221                                         struct nfs4_label *label)
4222 {
4223         uint32_t pi = 0;
4224         uint32_t lfs = 0;
4225         __u32 len;
4226         __be32 *p;
4227         int status = 0;
4228
4229         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4230                 return -EIO;
4231         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4232                 p = xdr_inline_decode(xdr, 4);
4233                 if (unlikely(!p))
4234                         goto out_overflow;
4235                 lfs = be32_to_cpup(p++);
4236                 p = xdr_inline_decode(xdr, 4);
4237                 if (unlikely(!p))
4238                         goto out_overflow;
4239                 pi = be32_to_cpup(p++);
4240                 p = xdr_inline_decode(xdr, 4);
4241                 if (unlikely(!p))
4242                         goto out_overflow;
4243                 len = be32_to_cpup(p++);
4244                 p = xdr_inline_decode(xdr, len);
4245                 if (unlikely(!p))
4246                         goto out_overflow;
4247                 if (len < NFS4_MAXLABELLEN) {
4248                         if (label) {
4249                                 memcpy(label->label, p, len);
4250                                 label->len = len;
4251                                 label->pi = pi;
4252                                 label->lfs = lfs;
4253                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4254                         }
4255                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4256                 } else
4257                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4258                                         __func__, len);
4259         }
4260         if (label && label->label)
4261                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4262                         (char *)label->label, label->len, label->pi, label->lfs);
4263         return status;
4264
4265 out_overflow:
4266         print_overflow_msg(__func__, xdr);
4267         return -EIO;
4268 }
4269
4270 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4271 {
4272         int status = 0;
4273
4274         time->tv_sec = 0;
4275         time->tv_nsec = 0;
4276         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4277                 return -EIO;
4278         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4279                 status = decode_attr_time(xdr, time);
4280                 if (status == 0)
4281                         status = NFS_ATTR_FATTR_MTIME;
4282                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4283         }
4284         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4285         return status;
4286 }
4287
4288 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4289 {
4290         unsigned int attrwords = XDR_QUADLEN(attrlen);
4291         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4292
4293         if (unlikely(attrwords != nwords)) {
4294                 dprintk("%s: server returned incorrect attribute length: "
4295                         "%u %c %u\n",
4296                                 __func__,
4297                                 attrwords << 2,
4298                                 (attrwords < nwords) ? '<' : '>',
4299                                 nwords << 2);
4300                 return -EIO;
4301         }
4302         return 0;
4303 }
4304
4305 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4306 {
4307         __be32 *p;
4308
4309         p = xdr_inline_decode(xdr, 20);
4310         if (unlikely(!p))
4311                 goto out_overflow;
4312         cinfo->atomic = be32_to_cpup(p++);
4313         p = xdr_decode_hyper(p, &cinfo->before);
4314         xdr_decode_hyper(p, &cinfo->after);
4315         return 0;
4316 out_overflow:
4317         print_overflow_msg(__func__, xdr);
4318         return -EIO;
4319 }
4320
4321 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4322 {
4323         __be32 *p;
4324         uint32_t supp, acc;
4325         int status;
4326
4327         status = decode_op_hdr(xdr, OP_ACCESS);
4328         if (status)
4329                 return status;
4330         p = xdr_inline_decode(xdr, 8);
4331         if (unlikely(!p))
4332                 goto out_overflow;
4333         supp = be32_to_cpup(p++);
4334         acc = be32_to_cpup(p);
4335         *supported = supp;
4336         *access = acc;
4337         return 0;
4338 out_overflow:
4339         print_overflow_msg(__func__, xdr);
4340         return -EIO;
4341 }
4342
4343 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4344 {
4345         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4346         if (unlikely(ret < 0)) {
4347                 print_overflow_msg(__func__, xdr);
4348                 return -EIO;
4349         }
4350         return 0;
4351 }
4352
4353 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4354 {
4355         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4356 }
4357
4358 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4359 {
4360         stateid->type = NFS4_OPEN_STATEID_TYPE;
4361         return decode_stateid(xdr, stateid);
4362 }
4363
4364 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4365 {
4366         stateid->type = NFS4_LOCK_STATEID_TYPE;
4367         return decode_stateid(xdr, stateid);
4368 }
4369
4370 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4371 {
4372         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4373         return decode_stateid(xdr, stateid);
4374 }
4375
4376 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4377 {
4378         nfs4_stateid dummy;
4379
4380         nfs4_stateid_copy(stateid, &invalid_stateid);
4381         return decode_stateid(xdr, &dummy);
4382 }
4383
4384 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4385 {
4386         int status;
4387
4388         status = decode_op_hdr(xdr, OP_CLOSE);
4389         if (status != -EIO)
4390                 nfs_increment_open_seqid(status, res->seqid);
4391         if (!status)
4392                 status = decode_invalid_stateid(xdr, &res->stateid);
4393         return status;
4394 }
4395
4396 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4397 {
4398         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4399 }
4400
4401 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4402 {
4403         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4404 }
4405
4406 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4407 {
4408         int status;
4409
4410         status = decode_op_hdr(xdr, OP_COMMIT);
4411         if (!status)
4412                 status = decode_write_verifier(xdr, &res->verf->verifier);
4413         return status;
4414 }
4415
4416 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4417 {
4418         __be32 *p;
4419         uint32_t bmlen;
4420         int status;
4421
4422         status = decode_op_hdr(xdr, OP_CREATE);
4423         if (status)
4424                 return status;
4425         if ((status = decode_change_info(xdr, cinfo)))
4426                 return status;
4427         p = xdr_inline_decode(xdr, 4);
4428         if (unlikely(!p))
4429                 goto out_overflow;
4430         bmlen = be32_to_cpup(p);
4431         p = xdr_inline_decode(xdr, bmlen << 2);
4432         if (likely(p))
4433                 return 0;
4434 out_overflow:
4435         print_overflow_msg(__func__, xdr);
4436         return -EIO;
4437 }
4438
4439 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4440 {
4441         unsigned int savep;
4442         uint32_t attrlen, bitmap[3] = {0};
4443         int status;
4444
4445         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4446                 goto xdr_error;
4447         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4448                 goto xdr_error;
4449         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4450                 goto xdr_error;
4451         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4452                 goto xdr_error;
4453         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4454                                                  &res->fh_expire_type)) != 0)
4455                 goto xdr_error;
4456         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4457                 goto xdr_error;
4458         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4459                 goto xdr_error;
4460         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4461                 goto xdr_error;
4462         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4463                                 res->exclcreat_bitmask)) != 0)
4464                 goto xdr_error;
4465         status = verify_attr_len(xdr, savep, attrlen);
4466 xdr_error:
4467         dprintk("%s: xdr returned %d!\n", __func__, -status);
4468         return status;
4469 }
4470
4471 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4472 {
4473         unsigned int savep;
4474         uint32_t attrlen, bitmap[3] = {0};
4475         int status;
4476
4477         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4478                 goto xdr_error;
4479         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4480                 goto xdr_error;
4481         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4482                 goto xdr_error;
4483
4484         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4485                 goto xdr_error;
4486         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4487                 goto xdr_error;
4488         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4489                 goto xdr_error;
4490
4491         status = -EIO;
4492         if (unlikely(bitmap[0]))
4493                 goto xdr_error;
4494
4495         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4496                 goto xdr_error;
4497         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4498                 goto xdr_error;
4499         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4500                 goto xdr_error;
4501
4502         status = verify_attr_len(xdr, savep, attrlen);
4503 xdr_error:
4504         dprintk("%s: xdr returned %d!\n", __func__, -status);
4505         return status;
4506 }
4507
4508 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4509 {
4510         unsigned int savep;
4511         uint32_t attrlen, bitmap[3] = {0};
4512         int status;
4513
4514         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4515                 goto xdr_error;
4516         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4517                 goto xdr_error;
4518         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4519                 goto xdr_error;
4520
4521         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4522                 goto xdr_error;
4523         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4524                 goto xdr_error;
4525
4526         status = verify_attr_len(xdr, savep, attrlen);
4527 xdr_error:
4528         dprintk("%s: xdr returned %d!\n", __func__, -status);
4529         return status;
4530 }
4531
4532 static int decode_threshold_hint(struct xdr_stream *xdr,
4533                                   uint32_t *bitmap,
4534                                   uint64_t *res,
4535                                   uint32_t hint_bit)
4536 {
4537         __be32 *p;
4538
4539         *res = 0;
4540         if (likely(bitmap[0] & hint_bit)) {
4541                 p = xdr_inline_decode(xdr, 8);
4542                 if (unlikely(!p))
4543                         goto out_overflow;
4544                 xdr_decode_hyper(p, res);
4545         }
4546         return 0;
4547 out_overflow:
4548         print_overflow_msg(__func__, xdr);
4549         return -EIO;
4550 }
4551
4552 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4553                                         struct nfs4_threshold *res)
4554 {
4555         __be32 *p;
4556         unsigned int savep;
4557         uint32_t bitmap[3] = {0,}, attrlen;
4558         int status;
4559
4560         /* layout type */
4561         p = xdr_inline_decode(xdr, 4);
4562         if (unlikely(!p)) {
4563                 print_overflow_msg(__func__, xdr);
4564                 return -EIO;
4565         }
4566         res->l_type = be32_to_cpup(p);
4567
4568         /* thi_hintset bitmap */
4569         status = decode_attr_bitmap(xdr, bitmap);
4570         if (status < 0)
4571                 goto xdr_error;
4572
4573         /* thi_hintlist length */
4574         status = decode_attr_length(xdr, &attrlen, &savep);
4575         if (status < 0)
4576                 goto xdr_error;
4577         /* thi_hintlist */
4578         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4579         if (status < 0)
4580                 goto xdr_error;
4581         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4582         if (status < 0)
4583                 goto xdr_error;
4584         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4585                                        THRESHOLD_RD_IO);
4586         if (status < 0)
4587                 goto xdr_error;
4588         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4589                                        THRESHOLD_WR_IO);
4590         if (status < 0)
4591                 goto xdr_error;
4592
4593         status = verify_attr_len(xdr, savep, attrlen);
4594         res->bm = bitmap[0];
4595
4596         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4597                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4598                 res->wr_io_sz);
4599 xdr_error:
4600         dprintk("%s ret=%d!\n", __func__, status);
4601         return status;
4602 }
4603
4604 /*
4605  * Thresholds on pNFS direct I/O vrs MDS I/O
4606  */
4607 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4608                                     uint32_t *bitmap,
4609                                     struct nfs4_threshold *res)
4610 {
4611         __be32 *p;
4612         int status = 0;
4613         uint32_t num;
4614
4615         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4616                 return -EIO;
4617         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4618                 /* Did the server return an unrequested attribute? */
4619                 if (unlikely(res == NULL))
4620                         return -EREMOTEIO;
4621                 p = xdr_inline_decode(xdr, 4);
4622                 if (unlikely(!p))
4623                         goto out_overflow;
4624                 num = be32_to_cpup(p);
4625                 if (num == 0)
4626                         return 0;
4627                 if (num > 1)
4628                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4629                                 "drivers per filesystem not supported\n",
4630                                 __func__);
4631
4632                 status = decode_first_threshold_item4(xdr, res);
4633                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4634         }
4635         return status;
4636 out_overflow:
4637         print_overflow_msg(__func__, xdr);
4638         return -EIO;
4639 }
4640
4641 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4642                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4643                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4644                 const struct nfs_server *server)
4645 {
4646         int status;
4647         umode_t fmode = 0;
4648         uint32_t type;
4649         int32_t err;
4650
4651         status = decode_attr_type(xdr, bitmap, &type);
4652         if (status < 0)
4653                 goto xdr_error;
4654         fattr->mode = 0;
4655         if (status != 0) {
4656                 fattr->mode |= nfs_type2fmt[type];
4657                 fattr->valid |= status;
4658         }
4659
4660         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4661         if (status < 0)
4662                 goto xdr_error;
4663         fattr->valid |= status;
4664
4665         status = decode_attr_size(xdr, bitmap, &fattr->size);
4666         if (status < 0)
4667                 goto xdr_error;
4668         fattr->valid |= status;
4669
4670         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4671         if (status < 0)
4672                 goto xdr_error;
4673         fattr->valid |= status;
4674
4675         err = 0;
4676         status = decode_attr_error(xdr, bitmap, &err);
4677         if (status < 0)
4678                 goto xdr_error;
4679
4680         status = decode_attr_filehandle(xdr, bitmap, fh);
4681         if (status < 0)
4682                 goto xdr_error;
4683
4684         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4685         if (status < 0)
4686                 goto xdr_error;
4687         fattr->valid |= status;
4688
4689         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4690         if (status < 0)
4691                 goto xdr_error;
4692         fattr->valid |= status;
4693
4694         status = -EIO;
4695         if (unlikely(bitmap[0]))
4696                 goto xdr_error;
4697
4698         status = decode_attr_mode(xdr, bitmap, &fmode);
4699         if (status < 0)
4700                 goto xdr_error;
4701         if (status != 0) {
4702                 fattr->mode |= fmode;
4703                 fattr->valid |= status;
4704         }
4705
4706         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4707         if (status < 0)
4708                 goto xdr_error;
4709         fattr->valid |= status;
4710
4711         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4712         if (status < 0)
4713                 goto xdr_error;
4714         fattr->valid |= status;
4715
4716         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4717         if (status < 0)
4718                 goto xdr_error;
4719         fattr->valid |= status;
4720
4721         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4722         if (status < 0)
4723                 goto xdr_error;
4724         fattr->valid |= status;
4725
4726         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4727         if (status < 0)
4728                 goto xdr_error;
4729         fattr->valid |= status;
4730
4731         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4732         if (status < 0)
4733                 goto xdr_error;
4734         fattr->valid |= status;
4735
4736         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4737         if (status < 0)
4738                 goto xdr_error;
4739         fattr->valid |= status;
4740
4741         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4742         if (status < 0)
4743                 goto xdr_error;
4744         fattr->valid |= status;
4745
4746         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4747         if (status < 0)
4748                 goto xdr_error;
4749         fattr->valid |= status;
4750
4751         status = -EIO;
4752         if (unlikely(bitmap[1]))
4753                 goto xdr_error;
4754
4755         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4756         if (status < 0)
4757                 goto xdr_error;
4758
4759         if (label) {
4760                 status = decode_attr_security_label(xdr, bitmap, label);
4761                 if (status < 0)
4762                         goto xdr_error;
4763                 fattr->valid |= status;
4764         }
4765
4766 xdr_error:
4767         dprintk("%s: xdr returned %d\n", __func__, -status);
4768         return status;
4769 }
4770
4771 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4772                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4773                 struct nfs4_label *label, const struct nfs_server *server)
4774 {
4775         unsigned int savep;
4776         uint32_t attrlen,
4777                  bitmap[3] = {0};
4778         int status;
4779
4780         status = decode_op_hdr(xdr, OP_GETATTR);
4781         if (status < 0)
4782                 goto xdr_error;
4783
4784         status = decode_attr_bitmap(xdr, bitmap);
4785         if (status < 0)
4786                 goto xdr_error;
4787
4788         status = decode_attr_length(xdr, &attrlen, &savep);
4789         if (status < 0)
4790                 goto xdr_error;
4791
4792         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4793                                         label, server);
4794         if (status < 0)
4795                 goto xdr_error;
4796
4797         status = verify_attr_len(xdr, savep, attrlen);
4798 xdr_error:
4799         dprintk("%s: xdr returned %d\n", __func__, -status);
4800         return status;
4801 }
4802
4803 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4804                 struct nfs4_label *label, const struct nfs_server *server)
4805 {
4806         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4807 }
4808
4809 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4810                 const struct nfs_server *server)
4811 {
4812         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4813 }
4814
4815 /*
4816  * Decode potentially multiple layout types.
4817  */
4818 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4819                                     struct nfs_fsinfo *fsinfo)
4820 {
4821         __be32 *p;
4822         uint32_t i;
4823
4824         p = xdr_inline_decode(xdr, 4);
4825         if (unlikely(!p))
4826                 goto out_overflow;
4827         fsinfo->nlayouttypes = be32_to_cpup(p);
4828
4829         /* pNFS is not supported by the underlying file system */
4830         if (fsinfo->nlayouttypes == 0)
4831                 return 0;
4832
4833         /* Decode and set first layout type, move xdr->p past unused types */
4834         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4835         if (unlikely(!p))
4836                 goto out_overflow;
4837
4838         /* If we get too many, then just cap it at the max */
4839         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4840                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4841                         __func__, fsinfo->nlayouttypes);
4842                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4843         }
4844
4845         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4846                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4847         return 0;
4848 out_overflow:
4849         print_overflow_msg(__func__, xdr);
4850         return -EIO;
4851 }
4852
4853 /*
4854  * The type of file system exported.
4855  * Note we must ensure that layouttype is set in any non-error case.
4856  */
4857 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4858                                 struct nfs_fsinfo *fsinfo)
4859 {
4860         int status = 0;
4861
4862         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4863         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4864                 return -EIO;
4865         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4866                 status = decode_pnfs_layout_types(xdr, fsinfo);
4867                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4868         }
4869         return status;
4870 }
4871
4872 /*
4873  * The prefered block size for layout directed io
4874  */
4875 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4876                                       uint32_t *res)
4877 {
4878         __be32 *p;
4879
4880         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4881         *res = 0;
4882         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4883                 p = xdr_inline_decode(xdr, 4);
4884                 if (unlikely(!p)) {
4885                         print_overflow_msg(__func__, xdr);
4886                         return -EIO;
4887                 }
4888                 *res = be32_to_cpup(p);
4889                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4890         }
4891         return 0;
4892 }
4893
4894 /*
4895  * The granularity of a CLONE operation.
4896  */
4897 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4898                                      uint32_t *res)
4899 {
4900         __be32 *p;
4901
4902         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4903         *res = 0;
4904         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4905                 p = xdr_inline_decode(xdr, 4);
4906                 if (unlikely(!p)) {
4907                         print_overflow_msg(__func__, xdr);
4908                         return -EIO;
4909                 }
4910                 *res = be32_to_cpup(p);
4911                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4912         }
4913         return 0;
4914 }
4915
4916 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4917 {
4918         unsigned int savep;
4919         uint32_t attrlen, bitmap[3];
4920         int status;
4921
4922         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4923                 goto xdr_error;
4924         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4925                 goto xdr_error;
4926         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4927                 goto xdr_error;
4928
4929         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4930
4931         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4932                 goto xdr_error;
4933         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4934                 goto xdr_error;
4935         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4936                 goto xdr_error;
4937         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4938         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4939                 goto xdr_error;
4940         fsinfo->wtpref = fsinfo->wtmax;
4941
4942         status = -EIO;
4943         if (unlikely(bitmap[0]))
4944                 goto xdr_error;
4945
4946         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4947         if (status != 0)
4948                 goto xdr_error;
4949         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4950         if (status != 0)
4951                 goto xdr_error;
4952
4953         status = -EIO;
4954         if (unlikely(bitmap[1]))
4955                 goto xdr_error;
4956
4957         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4958         if (status)
4959                 goto xdr_error;
4960         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4961         if (status)
4962                 goto xdr_error;
4963
4964         status = verify_attr_len(xdr, savep, attrlen);
4965 xdr_error:
4966         dprintk("%s: xdr returned %d!\n", __func__, -status);
4967         return status;
4968 }
4969
4970 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4971 {
4972         __be32 *p;
4973         uint32_t len;
4974         int status;
4975
4976         /* Zero handle first to allow comparisons */
4977         memset(fh, 0, sizeof(*fh));
4978
4979         status = decode_op_hdr(xdr, OP_GETFH);
4980         if (status)
4981                 return status;
4982
4983         p = xdr_inline_decode(xdr, 4);
4984         if (unlikely(!p))
4985                 goto out_overflow;
4986         len = be32_to_cpup(p);
4987         if (len > NFS4_FHSIZE)
4988                 return -EIO;
4989         fh->size = len;
4990         p = xdr_inline_decode(xdr, len);
4991         if (unlikely(!p))
4992                 goto out_overflow;
4993         memcpy(fh->data, p, len);
4994         return 0;
4995 out_overflow:
4996         print_overflow_msg(__func__, xdr);
4997         return -EIO;
4998 }
4999
5000 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5001 {
5002         int status;
5003
5004         status = decode_op_hdr(xdr, OP_LINK);
5005         if (status)
5006                 return status;
5007         return decode_change_info(xdr, cinfo);
5008 }
5009
5010 /*
5011  * We create the owner, so we know a proper owner.id length is 4.
5012  */
5013 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5014 {
5015         uint64_t offset, length, clientid;
5016         __be32 *p;
5017         uint32_t namelen, type;
5018
5019         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5020         if (unlikely(!p))
5021                 goto out_overflow;
5022         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5023         p = xdr_decode_hyper(p, &length);
5024         type = be32_to_cpup(p++); /* 4 byte read */
5025         if (fl != NULL) { /* manipulate file lock */
5026                 fl->fl_start = (loff_t)offset;
5027                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5028                 if (length == ~(uint64_t)0)
5029                         fl->fl_end = OFFSET_MAX;
5030                 fl->fl_type = F_WRLCK;
5031                 if (type & 1)
5032                         fl->fl_type = F_RDLCK;
5033                 fl->fl_pid = 0;
5034         }
5035         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5036         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5037         p = xdr_inline_decode(xdr, namelen); /* variable size field */
5038         if (likely(p))
5039                 return -NFS4ERR_DENIED;
5040 out_overflow:
5041         print_overflow_msg(__func__, xdr);
5042         return -EIO;
5043 }
5044
5045 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5046 {
5047         int status;
5048
5049         status = decode_op_hdr(xdr, OP_LOCK);
5050         if (status == -EIO)
5051                 goto out;
5052         if (status == 0) {
5053                 status = decode_lock_stateid(xdr, &res->stateid);
5054                 if (unlikely(status))
5055                         goto out;
5056         } else if (status == -NFS4ERR_DENIED)
5057                 status = decode_lock_denied(xdr, NULL);
5058         if (res->open_seqid != NULL)
5059                 nfs_increment_open_seqid(status, res->open_seqid);
5060         nfs_increment_lock_seqid(status, res->lock_seqid);
5061 out:
5062         return status;
5063 }
5064
5065 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5066 {
5067         int status;
5068         status = decode_op_hdr(xdr, OP_LOCKT);
5069         if (status == -NFS4ERR_DENIED)
5070                 return decode_lock_denied(xdr, res->denied);
5071         return status;
5072 }
5073
5074 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5075 {
5076         int status;
5077
5078         status = decode_op_hdr(xdr, OP_LOCKU);
5079         if (status != -EIO)
5080                 nfs_increment_lock_seqid(status, res->seqid);
5081         if (status == 0)
5082                 status = decode_lock_stateid(xdr, &res->stateid);
5083         return status;
5084 }
5085
5086 static int decode_release_lockowner(struct xdr_stream *xdr)
5087 {
5088         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5089 }
5090
5091 static int decode_lookup(struct xdr_stream *xdr)
5092 {
5093         return decode_op_hdr(xdr, OP_LOOKUP);
5094 }
5095
5096 static int decode_lookupp(struct xdr_stream *xdr)
5097 {
5098         return decode_op_hdr(xdr, OP_LOOKUPP);
5099 }
5100
5101 /* This is too sick! */
5102 static int decode_space_limit(struct xdr_stream *xdr,
5103                 unsigned long *pagemod_limit)
5104 {
5105         __be32 *p;
5106         uint32_t limit_type, nblocks, blocksize;
5107         u64 maxsize = 0;
5108
5109         p = xdr_inline_decode(xdr, 12);
5110         if (unlikely(!p))
5111                 goto out_overflow;
5112         limit_type = be32_to_cpup(p++);
5113         switch (limit_type) {
5114         case NFS4_LIMIT_SIZE:
5115                 xdr_decode_hyper(p, &maxsize);
5116                 break;
5117         case NFS4_LIMIT_BLOCKS:
5118                 nblocks = be32_to_cpup(p++);
5119                 blocksize = be32_to_cpup(p);
5120                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5121         }
5122         maxsize >>= PAGE_SHIFT;
5123         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5124         return 0;
5125 out_overflow:
5126         print_overflow_msg(__func__, xdr);
5127         return -EIO;
5128 }
5129
5130 static int decode_rw_delegation(struct xdr_stream *xdr,
5131                 uint32_t delegation_type,
5132                 struct nfs_openres *res)
5133 {
5134         __be32 *p;
5135         int status;
5136
5137         status = decode_delegation_stateid(xdr, &res->delegation);
5138         if (unlikely(status))
5139                 return status;
5140         p = xdr_inline_decode(xdr, 4);
5141         if (unlikely(!p))
5142                 goto out_overflow;
5143         res->do_recall = be32_to_cpup(p);
5144
5145         switch (delegation_type) {
5146         case NFS4_OPEN_DELEGATE_READ:
5147                 res->delegation_type = FMODE_READ;
5148                 break;
5149         case NFS4_OPEN_DELEGATE_WRITE:
5150                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5151                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5152                                 return -EIO;
5153         }
5154         return decode_ace(xdr, NULL);
5155 out_overflow:
5156         print_overflow_msg(__func__, xdr);
5157         return -EIO;
5158 }
5159
5160 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5161 {
5162         __be32 *p;
5163         uint32_t why_no_delegation;
5164
5165         p = xdr_inline_decode(xdr, 4);
5166         if (unlikely(!p))
5167                 goto out_overflow;
5168         why_no_delegation = be32_to_cpup(p);
5169         switch (why_no_delegation) {
5170                 case WND4_CONTENTION:
5171                 case WND4_RESOURCE:
5172                         xdr_inline_decode(xdr, 4);
5173                         /* Ignore for now */
5174         }
5175         return 0;
5176 out_overflow:
5177         print_overflow_msg(__func__, xdr);
5178         return -EIO;
5179 }
5180
5181 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5182 {
5183         __be32 *p;
5184         uint32_t delegation_type;
5185
5186         p = xdr_inline_decode(xdr, 4);
5187         if (unlikely(!p))
5188                 goto out_overflow;
5189         delegation_type = be32_to_cpup(p);
5190         res->delegation_type = 0;
5191         switch (delegation_type) {
5192         case NFS4_OPEN_DELEGATE_NONE:
5193                 return 0;
5194         case NFS4_OPEN_DELEGATE_READ:
5195         case NFS4_OPEN_DELEGATE_WRITE:
5196                 return decode_rw_delegation(xdr, delegation_type, res);
5197         case NFS4_OPEN_DELEGATE_NONE_EXT:
5198                 return decode_no_delegation(xdr, res);
5199         }
5200         return -EIO;
5201 out_overflow:
5202         print_overflow_msg(__func__, xdr);
5203         return -EIO;
5204 }
5205
5206 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5207 {
5208         __be32 *p;
5209         uint32_t savewords, bmlen, i;
5210         int status;
5211
5212         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5213                 return status;
5214         nfs_increment_open_seqid(status, res->seqid);
5215         if (status)
5216                 return status;
5217         status = decode_open_stateid(xdr, &res->stateid);
5218         if (unlikely(status))
5219                 return status;
5220
5221         decode_change_info(xdr, &res->cinfo);
5222
5223         p = xdr_inline_decode(xdr, 8);
5224         if (unlikely(!p))
5225                 goto out_overflow;
5226         res->rflags = be32_to_cpup(p++);
5227         bmlen = be32_to_cpup(p);
5228         if (bmlen > 10)
5229                 goto xdr_error;
5230
5231         p = xdr_inline_decode(xdr, bmlen << 2);
5232         if (unlikely(!p))
5233                 goto out_overflow;
5234         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5235         for (i = 0; i < savewords; ++i)
5236                 res->attrset[i] = be32_to_cpup(p++);
5237         for (; i < NFS4_BITMAP_SIZE; i++)
5238                 res->attrset[i] = 0;
5239
5240         return decode_delegation(xdr, res);
5241 xdr_error:
5242         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5243         return -EIO;
5244 out_overflow:
5245         print_overflow_msg(__func__, xdr);
5246         return -EIO;
5247 }
5248
5249 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5250 {
5251         int status;
5252
5253         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5254         if (status != -EIO)
5255                 nfs_increment_open_seqid(status, res->seqid);
5256         if (!status)
5257                 status = decode_open_stateid(xdr, &res->stateid);
5258         return status;
5259 }
5260
5261 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5262 {
5263         int status;
5264
5265         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5266         if (status != -EIO)
5267                 nfs_increment_open_seqid(status, res->seqid);
5268         if (!status)
5269                 status = decode_open_stateid(xdr, &res->stateid);
5270         return status;
5271 }
5272
5273 static int decode_putfh(struct xdr_stream *xdr)
5274 {
5275         return decode_op_hdr(xdr, OP_PUTFH);
5276 }
5277
5278 static int decode_putrootfh(struct xdr_stream *xdr)
5279 {
5280         return decode_op_hdr(xdr, OP_PUTROOTFH);
5281 }
5282
5283 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5284                        struct nfs_pgio_res *res)
5285 {
5286         __be32 *p;
5287         uint32_t count, eof, recvd;
5288         int status;
5289
5290         status = decode_op_hdr(xdr, OP_READ);
5291         if (status)
5292                 return status;
5293         p = xdr_inline_decode(xdr, 8);
5294         if (unlikely(!p))
5295                 goto out_overflow;
5296         eof = be32_to_cpup(p++);
5297         count = be32_to_cpup(p);
5298         recvd = xdr_read_pages(xdr, count);
5299         if (count > recvd) {
5300                 dprintk("NFS: server cheating in read reply: "
5301                                 "count %u > recvd %u\n", count, recvd);
5302                 count = recvd;
5303                 eof = 0;
5304         }
5305         res->eof = eof;
5306         res->count = count;
5307         return 0;
5308 out_overflow:
5309         print_overflow_msg(__func__, xdr);
5310         return -EIO;
5311 }
5312
5313 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5314 {
5315         int             status;
5316         __be32          verf[2];
5317
5318         status = decode_op_hdr(xdr, OP_READDIR);
5319         if (!status)
5320                 status = decode_verifier(xdr, readdir->verifier.data);
5321         if (unlikely(status))
5322                 return status;
5323         memcpy(verf, readdir->verifier.data, sizeof(verf));
5324         dprintk("%s: verifier = %08x:%08x\n",
5325                         __func__, verf[0], verf[1]);
5326         return xdr_read_pages(xdr, xdr->buf->page_len);
5327 }
5328
5329 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5330 {
5331         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5332         u32 len, recvd;
5333         __be32 *p;
5334         int status;
5335
5336         status = decode_op_hdr(xdr, OP_READLINK);
5337         if (status)
5338                 return status;
5339
5340         /* Convert length of symlink */
5341         p = xdr_inline_decode(xdr, 4);
5342         if (unlikely(!p))
5343                 goto out_overflow;
5344         len = be32_to_cpup(p);
5345         if (len >= rcvbuf->page_len || len <= 0) {
5346                 dprintk("nfs: server returned giant symlink!\n");
5347                 return -ENAMETOOLONG;
5348         }
5349         recvd = xdr_read_pages(xdr, len);
5350         if (recvd < len) {
5351                 dprintk("NFS: server cheating in readlink reply: "
5352                                 "count %u > recvd %u\n", len, recvd);
5353                 return -EIO;
5354         }
5355         /*
5356          * The XDR encode routine has set things up so that
5357          * the link text will be copied directly into the
5358          * buffer.  We just have to do overflow-checking,
5359          * and and null-terminate the text (the VFS expects
5360          * null-termination).
5361          */
5362         xdr_terminate_string(rcvbuf, len);
5363         return 0;
5364 out_overflow:
5365         print_overflow_msg(__func__, xdr);
5366         return -EIO;
5367 }
5368
5369 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5370 {
5371         int status;
5372
5373         status = decode_op_hdr(xdr, OP_REMOVE);
5374         if (status)
5375                 goto out;
5376         status = decode_change_info(xdr, cinfo);
5377 out:
5378         return status;
5379 }
5380
5381 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5382               struct nfs4_change_info *new_cinfo)
5383 {
5384         int status;
5385
5386         status = decode_op_hdr(xdr, OP_RENAME);
5387         if (status)
5388                 goto out;
5389         if ((status = decode_change_info(xdr, old_cinfo)))
5390                 goto out;
5391         status = decode_change_info(xdr, new_cinfo);
5392 out:
5393         return status;
5394 }
5395
5396 static int decode_renew(struct xdr_stream *xdr)
5397 {
5398         return decode_op_hdr(xdr, OP_RENEW);
5399 }
5400
5401 static int
5402 decode_restorefh(struct xdr_stream *xdr)
5403 {
5404         return decode_op_hdr(xdr, OP_RESTOREFH);
5405 }
5406
5407 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5408                          struct nfs_getaclres *res)
5409 {
5410         unsigned int savep;
5411         uint32_t attrlen,
5412                  bitmap[3] = {0};
5413         int status;
5414         unsigned int pg_offset;
5415
5416         res->acl_len = 0;
5417         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5418                 goto out;
5419
5420         xdr_enter_page(xdr, xdr->buf->page_len);
5421
5422         /* Calculate the offset of the page data */
5423         pg_offset = xdr->buf->head[0].iov_len;
5424
5425         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5426                 goto out;
5427         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5428                 goto out;
5429
5430         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5431                 return -EIO;
5432         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5433
5434                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5435                  * are stored with the acl data to handle the problem of
5436                  * variable length bitmaps.*/
5437                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5438                 res->acl_len = attrlen;
5439
5440                 /* Check for receive buffer overflow */
5441                 if (res->acl_len > (xdr->nwords << 2) ||
5442                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5443                         res->acl_flags |= NFS4_ACL_TRUNC;
5444                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5445                                         attrlen, xdr->nwords << 2);
5446                 }
5447         } else
5448                 status = -EOPNOTSUPP;
5449
5450 out:
5451         return status;
5452 }
5453
5454 static int
5455 decode_savefh(struct xdr_stream *xdr)
5456 {
5457         return decode_op_hdr(xdr, OP_SAVEFH);
5458 }
5459
5460 static int decode_setattr(struct xdr_stream *xdr)
5461 {
5462         int status;
5463
5464         status = decode_op_hdr(xdr, OP_SETATTR);
5465         if (status)
5466                 return status;
5467         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5468                 return 0;
5469         print_overflow_msg(__func__, xdr);
5470         return -EIO;
5471 }
5472
5473 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5474 {
5475         __be32 *p;
5476         uint32_t opnum;
5477         int32_t nfserr;
5478
5479         p = xdr_inline_decode(xdr, 8);
5480         if (unlikely(!p))
5481                 goto out_overflow;
5482         opnum = be32_to_cpup(p++);
5483         if (opnum != OP_SETCLIENTID) {
5484                 dprintk("nfs: decode_setclientid: Server returned operation"
5485                         " %d\n", opnum);
5486                 return -EIO;
5487         }
5488         nfserr = be32_to_cpup(p);
5489         if (nfserr == NFS_OK) {
5490                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5491                 if (unlikely(!p))
5492                         goto out_overflow;
5493                 p = xdr_decode_hyper(p, &res->clientid);
5494                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5495         } else if (nfserr == NFSERR_CLID_INUSE) {
5496                 uint32_t len;
5497
5498                 /* skip netid string */
5499                 p = xdr_inline_decode(xdr, 4);
5500                 if (unlikely(!p))
5501                         goto out_overflow;
5502                 len = be32_to_cpup(p);
5503                 p = xdr_inline_decode(xdr, len);
5504                 if (unlikely(!p))
5505                         goto out_overflow;
5506
5507                 /* skip uaddr string */
5508                 p = xdr_inline_decode(xdr, 4);
5509                 if (unlikely(!p))
5510                         goto out_overflow;
5511                 len = be32_to_cpup(p);
5512                 p = xdr_inline_decode(xdr, len);
5513                 if (unlikely(!p))
5514                         goto out_overflow;
5515                 return -NFSERR_CLID_INUSE;
5516         } else
5517                 return nfs4_stat_to_errno(nfserr);
5518
5519         return 0;
5520 out_overflow:
5521         print_overflow_msg(__func__, xdr);
5522         return -EIO;
5523 }
5524
5525 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5526 {
5527         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5528 }
5529
5530 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5531 {
5532         __be32 *p;
5533         int status;
5534
5535         status = decode_op_hdr(xdr, OP_WRITE);
5536         if (status)
5537                 return status;
5538
5539         p = xdr_inline_decode(xdr, 8);
5540         if (unlikely(!p))
5541                 goto out_overflow;
5542         res->count = be32_to_cpup(p++);
5543         res->verf->committed = be32_to_cpup(p++);
5544         return decode_write_verifier(xdr, &res->verf->verifier);
5545 out_overflow:
5546         print_overflow_msg(__func__, xdr);
5547         return -EIO;
5548 }
5549
5550 static int decode_delegreturn(struct xdr_stream *xdr)
5551 {
5552         return decode_op_hdr(xdr, OP_DELEGRETURN);
5553 }
5554
5555 static int decode_secinfo_gss(struct xdr_stream *xdr,
5556                               struct nfs4_secinfo4 *flavor)
5557 {
5558         u32 oid_len;
5559         __be32 *p;
5560
5561         p = xdr_inline_decode(xdr, 4);
5562         if (unlikely(!p))
5563                 goto out_overflow;
5564         oid_len = be32_to_cpup(p);
5565         if (oid_len > GSS_OID_MAX_LEN)
5566                 goto out_err;
5567
5568         p = xdr_inline_decode(xdr, oid_len);
5569         if (unlikely(!p))
5570                 goto out_overflow;
5571         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5572         flavor->flavor_info.oid.len = oid_len;
5573
5574         p = xdr_inline_decode(xdr, 8);
5575         if (unlikely(!p))
5576                 goto out_overflow;
5577         flavor->flavor_info.qop = be32_to_cpup(p++);
5578         flavor->flavor_info.service = be32_to_cpup(p);
5579
5580         return 0;
5581
5582 out_overflow:
5583         print_overflow_msg(__func__, xdr);
5584         return -EIO;
5585 out_err:
5586         return -EINVAL;
5587 }
5588
5589 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5590 {
5591         struct nfs4_secinfo4 *sec_flavor;
5592         unsigned int i, num_flavors;
5593         int status;
5594         __be32 *p;
5595
5596         p = xdr_inline_decode(xdr, 4);
5597         if (unlikely(!p))
5598                 goto out_overflow;
5599
5600         res->flavors->num_flavors = 0;
5601         num_flavors = be32_to_cpup(p);
5602
5603         for (i = 0; i < num_flavors; i++) {
5604                 sec_flavor = &res->flavors->flavors[i];
5605                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5606                         break;
5607
5608                 p = xdr_inline_decode(xdr, 4);
5609                 if (unlikely(!p))
5610                         goto out_overflow;
5611                 sec_flavor->flavor = be32_to_cpup(p);
5612
5613                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5614                         status = decode_secinfo_gss(xdr, sec_flavor);
5615                         if (status)
5616                                 goto out;
5617                 }
5618                 res->flavors->num_flavors++;
5619         }
5620
5621         status = 0;
5622 out:
5623         return status;
5624 out_overflow:
5625         print_overflow_msg(__func__, xdr);
5626         return -EIO;
5627 }
5628
5629 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5630 {
5631         int status = decode_op_hdr(xdr, OP_SECINFO);
5632         if (status)
5633                 return status;
5634         return decode_secinfo_common(xdr, res);
5635 }
5636
5637 #if defined(CONFIG_NFS_V4_1)
5638 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5639 {
5640         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5641         if (status)
5642                 return status;
5643         return decode_secinfo_common(xdr, res);
5644 }
5645
5646 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5647 {
5648         __be32 *p;
5649         uint32_t bitmap_words;
5650         unsigned int i;
5651
5652         p = xdr_inline_decode(xdr, 4);
5653         if (!p)
5654                 return -EIO;
5655         bitmap_words = be32_to_cpup(p++);
5656         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5657                 return -EIO;
5658         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5659         for (i = 0; i < bitmap_words; i++)
5660                 op_map->u.words[i] = be32_to_cpup(p++);
5661
5662         return 0;
5663 }
5664
5665 static int decode_exchange_id(struct xdr_stream *xdr,
5666                               struct nfs41_exchange_id_res *res)
5667 {
5668         __be32 *p;
5669         uint32_t dummy;
5670         char *dummy_str;
5671         int status;
5672         uint32_t impl_id_count;
5673
5674         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5675         if (status)
5676                 return status;
5677
5678         p = xdr_inline_decode(xdr, 8);
5679         if (unlikely(!p))
5680                 goto out_overflow;
5681         xdr_decode_hyper(p, &res->clientid);
5682         p = xdr_inline_decode(xdr, 12);
5683         if (unlikely(!p))
5684                 goto out_overflow;
5685         res->seqid = be32_to_cpup(p++);
5686         res->flags = be32_to_cpup(p++);
5687
5688         res->state_protect.how = be32_to_cpup(p);
5689         switch (res->state_protect.how) {
5690         case SP4_NONE:
5691                 break;
5692         case SP4_MACH_CRED:
5693                 status = decode_op_map(xdr, &res->state_protect.enforce);
5694                 if (status)
5695                         return status;
5696                 status = decode_op_map(xdr, &res->state_protect.allow);
5697                 if (status)
5698                         return status;
5699                 break;
5700         default:
5701                 WARN_ON_ONCE(1);
5702                 return -EIO;
5703         }
5704
5705         /* server_owner4.so_minor_id */
5706         p = xdr_inline_decode(xdr, 8);
5707         if (unlikely(!p))
5708                 goto out_overflow;
5709         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5710
5711         /* server_owner4.so_major_id */
5712         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5713         if (unlikely(status))
5714                 return status;
5715         memcpy(res->server_owner->major_id, dummy_str, dummy);
5716         res->server_owner->major_id_sz = dummy;
5717
5718         /* server_scope4 */
5719         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5720         if (unlikely(status))
5721                 return status;
5722         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5723         res->server_scope->server_scope_sz = dummy;
5724
5725         /* Implementation Id */
5726         p = xdr_inline_decode(xdr, 4);
5727         if (unlikely(!p))
5728                 goto out_overflow;
5729         impl_id_count = be32_to_cpup(p++);
5730
5731         if (impl_id_count) {
5732                 /* nii_domain */
5733                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5734                 if (unlikely(status))
5735                         return status;
5736                 memcpy(res->impl_id->domain, dummy_str, dummy);
5737
5738                 /* nii_name */
5739                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5740                 if (unlikely(status))
5741                         return status;
5742                 memcpy(res->impl_id->name, dummy_str, dummy);
5743
5744                 /* nii_date */
5745                 p = xdr_inline_decode(xdr, 12);
5746                 if (unlikely(!p))
5747                         goto out_overflow;
5748                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5749                 res->impl_id->date.nseconds = be32_to_cpup(p);
5750
5751                 /* if there's more than one entry, ignore the rest */
5752         }
5753         return 0;
5754 out_overflow:
5755         print_overflow_msg(__func__, xdr);
5756         return -EIO;
5757 }
5758
5759 static int decode_chan_attrs(struct xdr_stream *xdr,
5760                              struct nfs4_channel_attrs *attrs)
5761 {
5762         __be32 *p;
5763         u32 nr_attrs, val;
5764
5765         p = xdr_inline_decode(xdr, 28);
5766         if (unlikely(!p))
5767                 goto out_overflow;
5768         val = be32_to_cpup(p++);        /* headerpadsz */
5769         if (val)
5770                 return -EINVAL;         /* no support for header padding yet */
5771         attrs->max_rqst_sz = be32_to_cpup(p++);
5772         attrs->max_resp_sz = be32_to_cpup(p++);
5773         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5774         attrs->max_ops = be32_to_cpup(p++);
5775         attrs->max_reqs = be32_to_cpup(p++);
5776         nr_attrs = be32_to_cpup(p);
5777         if (unlikely(nr_attrs > 1)) {
5778                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5779                         "count %u\n", __func__, nr_attrs);
5780                 return -EINVAL;
5781         }
5782         if (nr_attrs == 1) {
5783                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5784                 if (unlikely(!p))
5785                         goto out_overflow;
5786         }
5787         return 0;
5788 out_overflow:
5789         print_overflow_msg(__func__, xdr);
5790         return -EIO;
5791 }
5792
5793 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5794 {
5795         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5796 }
5797
5798 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5799                                 struct nfs41_bind_conn_to_session_res *res)
5800 {
5801         __be32 *p;
5802         int status;
5803
5804         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5805         if (!status)
5806                 status = decode_sessionid(xdr, &res->sessionid);
5807         if (unlikely(status))
5808                 return status;
5809
5810         /* dir flags, rdma mode bool */
5811         p = xdr_inline_decode(xdr, 8);
5812         if (unlikely(!p))
5813                 goto out_overflow;
5814
5815         res->dir = be32_to_cpup(p++);
5816         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5817                 return -EIO;
5818         if (be32_to_cpup(p) == 0)
5819                 res->use_conn_in_rdma_mode = false;
5820         else
5821                 res->use_conn_in_rdma_mode = true;
5822
5823         return 0;
5824 out_overflow:
5825         print_overflow_msg(__func__, xdr);
5826         return -EIO;
5827 }
5828
5829 static int decode_create_session(struct xdr_stream *xdr,
5830                                  struct nfs41_create_session_res *res)
5831 {
5832         __be32 *p;
5833         int status;
5834
5835         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5836         if (!status)
5837                 status = decode_sessionid(xdr, &res->sessionid);
5838         if (unlikely(status))
5839                 return status;
5840
5841         /* seqid, flags */
5842         p = xdr_inline_decode(xdr, 8);
5843         if (unlikely(!p))
5844                 goto out_overflow;
5845         res->seqid = be32_to_cpup(p++);
5846         res->flags = be32_to_cpup(p);
5847
5848         /* Channel attributes */
5849         status = decode_chan_attrs(xdr, &res->fc_attrs);
5850         if (!status)
5851                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5852         return status;
5853 out_overflow:
5854         print_overflow_msg(__func__, xdr);
5855         return -EIO;
5856 }
5857
5858 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5859 {
5860         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5861 }
5862
5863 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5864 {
5865         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5866 }
5867
5868 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5869 {
5870         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5871 }
5872 #endif /* CONFIG_NFS_V4_1 */
5873
5874 static int decode_sequence(struct xdr_stream *xdr,
5875                            struct nfs4_sequence_res *res,
5876                            struct rpc_rqst *rqstp)
5877 {
5878 #if defined(CONFIG_NFS_V4_1)
5879         struct nfs4_session *session;
5880         struct nfs4_sessionid id;
5881         u32 dummy;
5882         int status;
5883         __be32 *p;
5884
5885         if (res->sr_slot == NULL)
5886                 return 0;
5887         if (!res->sr_slot->table->session)
5888                 return 0;
5889
5890         status = decode_op_hdr(xdr, OP_SEQUENCE);
5891         if (!status)
5892                 status = decode_sessionid(xdr, &id);
5893         if (unlikely(status))
5894                 goto out_err;
5895
5896         /*
5897          * If the server returns different values for sessionID, slotID or
5898          * sequence number, the server is looney tunes.
5899          */
5900         status = -EREMOTEIO;
5901         session = res->sr_slot->table->session;
5902
5903         if (memcmp(id.data, session->sess_id.data,
5904                    NFS4_MAX_SESSIONID_LEN)) {
5905                 dprintk("%s Invalid session id\n", __func__);
5906                 goto out_err;
5907         }
5908
5909         p = xdr_inline_decode(xdr, 20);
5910         if (unlikely(!p))
5911                 goto out_overflow;
5912
5913         /* seqid */
5914         dummy = be32_to_cpup(p++);
5915         if (dummy != res->sr_slot->seq_nr) {
5916                 dprintk("%s Invalid sequence number\n", __func__);
5917                 goto out_err;
5918         }
5919         /* slot id */
5920         dummy = be32_to_cpup(p++);
5921         if (dummy != res->sr_slot->slot_nr) {
5922                 dprintk("%s Invalid slot id\n", __func__);
5923                 goto out_err;
5924         }
5925         /* highest slot id */
5926         res->sr_highest_slotid = be32_to_cpup(p++);
5927         /* target highest slot id */
5928         res->sr_target_highest_slotid = be32_to_cpup(p++);
5929         /* result flags */
5930         res->sr_status_flags = be32_to_cpup(p);
5931         status = 0;
5932 out_err:
5933         res->sr_status = status;
5934         return status;
5935 out_overflow:
5936         print_overflow_msg(__func__, xdr);
5937         status = -EIO;
5938         goto out_err;
5939 #else  /* CONFIG_NFS_V4_1 */
5940         return 0;
5941 #endif /* CONFIG_NFS_V4_1 */
5942 }
5943
5944 #if defined(CONFIG_NFS_V4_1)
5945 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5946 {
5947         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5948         return decode_stateid(xdr, stateid);
5949 }
5950
5951 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5952                                 struct nfs4_getdeviceinfo_res *res)
5953 {
5954         struct pnfs_device *pdev = res->pdev;
5955         __be32 *p;
5956         uint32_t len, type;
5957         int status;
5958
5959         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5960         if (status) {
5961                 if (status == -ETOOSMALL) {
5962                         p = xdr_inline_decode(xdr, 4);
5963                         if (unlikely(!p))
5964                                 goto out_overflow;
5965                         pdev->mincount = be32_to_cpup(p);
5966                         dprintk("%s: Min count too small. mincnt = %u\n",
5967                                 __func__, pdev->mincount);
5968                 }
5969                 return status;
5970         }
5971
5972         p = xdr_inline_decode(xdr, 8);
5973         if (unlikely(!p))
5974                 goto out_overflow;
5975         type = be32_to_cpup(p++);
5976         if (type != pdev->layout_type) {
5977                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5978                         __func__, pdev->layout_type, type);
5979                 return -EINVAL;
5980         }
5981         /*
5982          * Get the length of the opaque device_addr4. xdr_read_pages places
5983          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5984          * and places the remaining xdr data in xdr_buf->tail
5985          */
5986         pdev->mincount = be32_to_cpup(p);
5987         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5988                 goto out_overflow;
5989
5990         /* Parse notification bitmap, verifying that it is zero. */
5991         p = xdr_inline_decode(xdr, 4);
5992         if (unlikely(!p))
5993                 goto out_overflow;
5994         len = be32_to_cpup(p);
5995         if (len) {
5996                 uint32_t i;
5997
5998                 p = xdr_inline_decode(xdr, 4 * len);
5999                 if (unlikely(!p))
6000                         goto out_overflow;
6001
6002                 res->notification = be32_to_cpup(p++);
6003                 for (i = 1; i < len; i++) {
6004                         if (be32_to_cpup(p++)) {
6005                                 dprintk("%s: unsupported notification\n",
6006                                         __func__);
6007                                 return -EIO;
6008                         }
6009                 }
6010         }
6011         return 0;
6012 out_overflow:
6013         print_overflow_msg(__func__, xdr);
6014         return -EIO;
6015 }
6016
6017 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6018                             struct nfs4_layoutget_res *res)
6019 {
6020         __be32 *p;
6021         int status;
6022         u32 layout_count;
6023         u32 recvd;
6024
6025         status = decode_op_hdr(xdr, OP_LAYOUTGET);
6026         if (status)
6027                 return status;
6028         p = xdr_inline_decode(xdr, 4);
6029         if (unlikely(!p))
6030                 goto out_overflow;
6031         res->return_on_close = be32_to_cpup(p);
6032         decode_layout_stateid(xdr, &res->stateid);
6033         p = xdr_inline_decode(xdr, 4);
6034         if (unlikely(!p))
6035                 goto out_overflow;
6036         layout_count = be32_to_cpup(p);
6037         if (!layout_count) {
6038                 dprintk("%s: server responded with empty layout array\n",
6039                         __func__);
6040                 return -EINVAL;
6041         }
6042
6043         p = xdr_inline_decode(xdr, 28);
6044         if (unlikely(!p))
6045                 goto out_overflow;
6046         p = xdr_decode_hyper(p, &res->range.offset);
6047         p = xdr_decode_hyper(p, &res->range.length);
6048         res->range.iomode = be32_to_cpup(p++);
6049         res->type = be32_to_cpup(p++);
6050         res->layoutp->len = be32_to_cpup(p);
6051
6052         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6053                 __func__,
6054                 (unsigned long)res->range.offset,
6055                 (unsigned long)res->range.length,
6056                 res->range.iomode,
6057                 res->type,
6058                 res->layoutp->len);
6059
6060         recvd = xdr_read_pages(xdr, res->layoutp->len);
6061         if (res->layoutp->len > recvd) {
6062                 dprintk("NFS: server cheating in layoutget reply: "
6063                                 "layout len %u > recvd %u\n",
6064                                 res->layoutp->len, recvd);
6065                 return -EINVAL;
6066         }
6067
6068         if (layout_count > 1) {
6069                 /* We only handle a length one array at the moment.  Any
6070                  * further entries are just ignored.  Note that this means
6071                  * the client may see a response that is less than the
6072                  * minimum it requested.
6073                  */
6074                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6075                         __func__, layout_count);
6076         }
6077
6078         return 0;
6079 out_overflow:
6080         print_overflow_msg(__func__, xdr);
6081         return -EIO;
6082 }
6083
6084 static int decode_layoutreturn(struct xdr_stream *xdr,
6085                                struct nfs4_layoutreturn_res *res)
6086 {
6087         __be32 *p;
6088         int status;
6089
6090         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6091         if (status)
6092                 return status;
6093         p = xdr_inline_decode(xdr, 4);
6094         if (unlikely(!p))
6095                 goto out_overflow;
6096         res->lrs_present = be32_to_cpup(p);
6097         if (res->lrs_present)
6098                 status = decode_layout_stateid(xdr, &res->stateid);
6099         else
6100                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6101         return status;
6102 out_overflow:
6103         print_overflow_msg(__func__, xdr);
6104         return -EIO;
6105 }
6106
6107 static int decode_layoutcommit(struct xdr_stream *xdr,
6108                                struct rpc_rqst *req,
6109                                struct nfs4_layoutcommit_res *res)
6110 {
6111         __be32 *p;
6112         __u32 sizechanged;
6113         int status;
6114
6115         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6116         res->status = status;
6117         if (status)
6118                 return status;
6119
6120         p = xdr_inline_decode(xdr, 4);
6121         if (unlikely(!p))
6122                 goto out_overflow;
6123         sizechanged = be32_to_cpup(p);
6124
6125         if (sizechanged) {
6126                 /* throw away new size */
6127                 p = xdr_inline_decode(xdr, 8);
6128                 if (unlikely(!p))
6129                         goto out_overflow;
6130         }
6131         return 0;
6132 out_overflow:
6133         print_overflow_msg(__func__, xdr);
6134         return -EIO;
6135 }
6136
6137 static int decode_test_stateid(struct xdr_stream *xdr,
6138                                struct nfs41_test_stateid_res *res)
6139 {
6140         __be32 *p;
6141         int status;
6142         int num_res;
6143
6144         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6145         if (status)
6146                 return status;
6147
6148         p = xdr_inline_decode(xdr, 4);
6149         if (unlikely(!p))
6150                 goto out_overflow;
6151         num_res = be32_to_cpup(p++);
6152         if (num_res != 1)
6153                 goto out;
6154
6155         p = xdr_inline_decode(xdr, 4);
6156         if (unlikely(!p))
6157                 goto out_overflow;
6158         res->status = be32_to_cpup(p++);
6159
6160         return status;
6161 out_overflow:
6162         print_overflow_msg(__func__, xdr);
6163 out:
6164         return -EIO;
6165 }
6166
6167 static int decode_free_stateid(struct xdr_stream *xdr,
6168                                struct nfs41_free_stateid_res *res)
6169 {
6170         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6171         return res->status;
6172 }
6173 #else
6174 static inline
6175 int decode_layoutreturn(struct xdr_stream *xdr,
6176                                struct nfs4_layoutreturn_res *res)
6177 {
6178         return 0;
6179 }
6180 #endif /* CONFIG_NFS_V4_1 */
6181
6182 /*
6183  * END OF "GENERIC" DECODE ROUTINES.
6184  */
6185
6186 /*
6187  * Decode OPEN_DOWNGRADE response
6188  */
6189 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6190                                        struct xdr_stream *xdr,
6191                                        void *data)
6192 {
6193         struct nfs_closeres *res = data;
6194         struct compound_hdr hdr;
6195         int status;
6196
6197         status = decode_compound_hdr(xdr, &hdr);
6198         if (status)
6199                 goto out;
6200         status = decode_sequence(xdr, &res->seq_res, rqstp);
6201         if (status)
6202                 goto out;
6203         status = decode_putfh(xdr);
6204         if (status)
6205                 goto out;
6206         if (res->lr_res) {
6207                 status = decode_layoutreturn(xdr, res->lr_res);
6208                 res->lr_ret = status;
6209                 if (status)
6210                         goto out;
6211         }
6212         status = decode_open_downgrade(xdr, res);
6213 out:
6214         return status;
6215 }
6216
6217 /*
6218  * Decode ACCESS response
6219  */
6220 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6221                                void *data)
6222 {
6223         struct nfs4_accessres *res = data;
6224         struct compound_hdr hdr;
6225         int status;
6226
6227         status = decode_compound_hdr(xdr, &hdr);
6228         if (status)
6229                 goto out;
6230         status = decode_sequence(xdr, &res->seq_res, rqstp);
6231         if (status)
6232                 goto out;
6233         status = decode_putfh(xdr);
6234         if (status != 0)
6235                 goto out;
6236         status = decode_access(xdr, &res->supported, &res->access);
6237         if (status != 0)
6238                 goto out;
6239         if (res->fattr)
6240                 decode_getfattr(xdr, res->fattr, res->server);
6241 out:
6242         return status;
6243 }
6244
6245 /*
6246  * Decode LOOKUP response
6247  */
6248 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6249                                void *data)
6250 {
6251         struct nfs4_lookup_res *res = data;
6252         struct compound_hdr hdr;
6253         int status;
6254
6255         status = decode_compound_hdr(xdr, &hdr);
6256         if (status)
6257                 goto out;
6258         status = decode_sequence(xdr, &res->seq_res, rqstp);
6259         if (status)
6260                 goto out;
6261         status = decode_putfh(xdr);
6262         if (status)
6263                 goto out;
6264         status = decode_lookup(xdr);
6265         if (status)
6266                 goto out;
6267         status = decode_getfh(xdr, res->fh);
6268         if (status)
6269                 goto out;
6270         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6271 out:
6272         return status;
6273 }
6274
6275 /*
6276  * Decode LOOKUPP response
6277  */
6278 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279                 void *data)
6280 {
6281         struct nfs4_lookupp_res *res = data;
6282         struct compound_hdr hdr;
6283         int status;
6284
6285         status = decode_compound_hdr(xdr, &hdr);
6286         if (status)
6287                 goto out;
6288         status = decode_sequence(xdr, &res->seq_res, rqstp);
6289         if (status)
6290                 goto out;
6291         status = decode_putfh(xdr);
6292         if (status)
6293                 goto out;
6294         status = decode_lookupp(xdr);
6295         if (status)
6296                 goto out;
6297         status = decode_getfh(xdr, res->fh);
6298         if (status)
6299                 goto out;
6300         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6301 out:
6302         return status;
6303 }
6304
6305 /*
6306  * Decode LOOKUP_ROOT response
6307  */
6308 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6309                                     struct xdr_stream *xdr,
6310                                     void *data)
6311 {
6312         struct nfs4_lookup_res *res = data;
6313         struct compound_hdr hdr;
6314         int status;
6315
6316         status = decode_compound_hdr(xdr, &hdr);
6317         if (status)
6318                 goto out;
6319         status = decode_sequence(xdr, &res->seq_res, rqstp);
6320         if (status)
6321                 goto out;
6322         status = decode_putrootfh(xdr);
6323         if (status)
6324                 goto out;
6325         status = decode_getfh(xdr, res->fh);
6326         if (status == 0)
6327                 status = decode_getfattr_label(xdr, res->fattr,
6328                                                 res->label, res->server);
6329 out:
6330         return status;
6331 }
6332
6333 /*
6334  * Decode REMOVE response
6335  */
6336 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6337                                void *data)
6338 {
6339         struct nfs_removeres *res = data;
6340         struct compound_hdr hdr;
6341         int status;
6342
6343         status = decode_compound_hdr(xdr, &hdr);
6344         if (status)
6345                 goto out;
6346         status = decode_sequence(xdr, &res->seq_res, rqstp);
6347         if (status)
6348                 goto out;
6349         status = decode_putfh(xdr);
6350         if (status)
6351                 goto out;
6352         status = decode_remove(xdr, &res->cinfo);
6353 out:
6354         return status;
6355 }
6356
6357 /*
6358  * Decode RENAME response
6359  */
6360 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6361                                void *data)
6362 {
6363         struct nfs_renameres *res = data;
6364         struct compound_hdr hdr;
6365         int status;
6366
6367         status = decode_compound_hdr(xdr, &hdr);
6368         if (status)
6369                 goto out;
6370         status = decode_sequence(xdr, &res->seq_res, rqstp);
6371         if (status)
6372                 goto out;
6373         status = decode_putfh(xdr);
6374         if (status)
6375                 goto out;
6376         status = decode_savefh(xdr);
6377         if (status)
6378                 goto out;
6379         status = decode_putfh(xdr);
6380         if (status)
6381                 goto out;
6382         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6383 out:
6384         return status;
6385 }
6386
6387 /*
6388  * Decode LINK response
6389  */
6390 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6391                              void *data)
6392 {
6393         struct nfs4_link_res *res = data;
6394         struct compound_hdr hdr;
6395         int status;
6396
6397         status = decode_compound_hdr(xdr, &hdr);
6398         if (status)
6399                 goto out;
6400         status = decode_sequence(xdr, &res->seq_res, rqstp);
6401         if (status)
6402                 goto out;
6403         status = decode_putfh(xdr);
6404         if (status)
6405                 goto out;
6406         status = decode_savefh(xdr);
6407         if (status)
6408                 goto out;
6409         status = decode_putfh(xdr);
6410         if (status)
6411                 goto out;
6412         status = decode_link(xdr, &res->cinfo);
6413         if (status)
6414                 goto out;
6415         /*
6416          * Note order: OP_LINK leaves the directory as the current
6417          *             filehandle.
6418          */
6419         status = decode_restorefh(xdr);
6420         if (status)
6421                 goto out;
6422         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6423 out:
6424         return status;
6425 }
6426
6427 /*
6428  * Decode CREATE response
6429  */
6430 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6431                                void *data)
6432 {
6433         struct nfs4_create_res *res = data;
6434         struct compound_hdr hdr;
6435         int status;
6436
6437         status = decode_compound_hdr(xdr, &hdr);
6438         if (status)
6439                 goto out;
6440         status = decode_sequence(xdr, &res->seq_res, rqstp);
6441         if (status)
6442                 goto out;
6443         status = decode_putfh(xdr);
6444         if (status)
6445                 goto out;
6446         status = decode_create(xdr, &res->dir_cinfo);
6447         if (status)
6448                 goto out;
6449         status = decode_getfh(xdr, res->fh);
6450         if (status)
6451                 goto out;
6452         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6453 out:
6454         return status;
6455 }
6456
6457 /*
6458  * Decode SYMLINK response
6459  */
6460 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6461                                 void *res)
6462 {
6463         return nfs4_xdr_dec_create(rqstp, xdr, res);
6464 }
6465
6466 /*
6467  * Decode GETATTR response
6468  */
6469 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6470                                 void *data)
6471 {
6472         struct nfs4_getattr_res *res = data;
6473         struct compound_hdr hdr;
6474         int status;
6475
6476         status = decode_compound_hdr(xdr, &hdr);
6477         if (status)
6478                 goto out;
6479         status = decode_sequence(xdr, &res->seq_res, rqstp);
6480         if (status)
6481                 goto out;
6482         status = decode_putfh(xdr);
6483         if (status)
6484                 goto out;
6485         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6486 out:
6487         return status;
6488 }
6489
6490 /*
6491  * Encode an SETACL request
6492  */
6493 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6494                                 const void *data)
6495 {
6496         const struct nfs_setaclargs *args = data;
6497         struct compound_hdr hdr = {
6498                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6499         };
6500
6501         encode_compound_hdr(xdr, req, &hdr);
6502         encode_sequence(xdr, &args->seq_args, &hdr);
6503         encode_putfh(xdr, args->fh, &hdr);
6504         encode_setacl(xdr, args, &hdr);
6505         encode_nops(&hdr);
6506 }
6507
6508 /*
6509  * Decode SETACL response
6510  */
6511 static int
6512 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6513                     void *data)
6514 {
6515         struct nfs_setaclres *res = data;
6516         struct compound_hdr hdr;
6517         int status;
6518
6519         status = decode_compound_hdr(xdr, &hdr);
6520         if (status)
6521                 goto out;
6522         status = decode_sequence(xdr, &res->seq_res, rqstp);
6523         if (status)
6524                 goto out;
6525         status = decode_putfh(xdr);
6526         if (status)
6527                 goto out;
6528         status = decode_setattr(xdr);
6529 out:
6530         return status;
6531 }
6532
6533 /*
6534  * Decode GETACL response
6535  */
6536 static int
6537 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6538                     void *data)
6539 {
6540         struct nfs_getaclres *res = data;
6541         struct compound_hdr hdr;
6542         int status;
6543
6544         if (res->acl_scratch != NULL) {
6545                 void *p = page_address(res->acl_scratch);
6546                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6547         }
6548         status = decode_compound_hdr(xdr, &hdr);
6549         if (status)
6550                 goto out;
6551         status = decode_sequence(xdr, &res->seq_res, rqstp);
6552         if (status)
6553                 goto out;
6554         status = decode_putfh(xdr);
6555         if (status)
6556                 goto out;
6557         status = decode_getacl(xdr, rqstp, res);
6558
6559 out:
6560         return status;
6561 }
6562
6563 /*
6564  * Decode CLOSE response
6565  */
6566 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6567                               void *data)
6568 {
6569         struct nfs_closeres *res = data;
6570         struct compound_hdr hdr;
6571         int status;
6572
6573         status = decode_compound_hdr(xdr, &hdr);
6574         if (status)
6575                 goto out;
6576         status = decode_sequence(xdr, &res->seq_res, rqstp);
6577         if (status)
6578                 goto out;
6579         status = decode_putfh(xdr);
6580         if (status)
6581                 goto out;
6582         if (res->lr_res) {
6583                 status = decode_layoutreturn(xdr, res->lr_res);
6584                 res->lr_ret = status;
6585                 if (status)
6586                         goto out;
6587         }
6588         if (res->fattr != NULL) {
6589                 status = decode_getfattr(xdr, res->fattr, res->server);
6590                 if (status != 0)
6591                         goto out;
6592         }
6593         status = decode_close(xdr, res);
6594 out:
6595         return status;
6596 }
6597
6598 /*
6599  * Decode OPEN response
6600  */
6601 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6602                              void *data)
6603 {
6604         struct nfs_openres *res = data;
6605         struct compound_hdr hdr;
6606         int status;
6607
6608         status = decode_compound_hdr(xdr, &hdr);
6609         if (status)
6610                 goto out;
6611         status = decode_sequence(xdr, &res->seq_res, rqstp);
6612         if (status)
6613                 goto out;
6614         status = decode_putfh(xdr);
6615         if (status)
6616                 goto out;
6617         status = decode_open(xdr, res);
6618         if (status)
6619                 goto out;
6620         status = decode_getfh(xdr, &res->fh);
6621         if (status)
6622                 goto out;
6623         if (res->access_request)
6624                 decode_access(xdr, &res->access_supported, &res->access_result);
6625         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6626 out:
6627         return status;
6628 }
6629
6630 /*
6631  * Decode OPEN_CONFIRM response
6632  */
6633 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6634                                      struct xdr_stream *xdr,
6635                                      void *data)
6636 {
6637         struct nfs_open_confirmres *res = data;
6638         struct compound_hdr hdr;
6639         int status;
6640
6641         status = decode_compound_hdr(xdr, &hdr);
6642         if (status)
6643                 goto out;
6644         status = decode_putfh(xdr);
6645         if (status)
6646                 goto out;
6647         status = decode_open_confirm(xdr, res);
6648 out:
6649         return status;
6650 }
6651
6652 /*
6653  * Decode OPEN response
6654  */
6655 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6656                                     struct xdr_stream *xdr,
6657                                     void *data)
6658 {
6659         struct nfs_openres *res = data;
6660         struct compound_hdr hdr;
6661         int status;
6662
6663         status = decode_compound_hdr(xdr, &hdr);
6664         if (status)
6665                 goto out;
6666         status = decode_sequence(xdr, &res->seq_res, rqstp);
6667         if (status)
6668                 goto out;
6669         status = decode_putfh(xdr);
6670         if (status)
6671                 goto out;
6672         status = decode_open(xdr, res);
6673         if (status)
6674                 goto out;
6675         if (res->access_request)
6676                 decode_access(xdr, &res->access_supported, &res->access_result);
6677         decode_getfattr(xdr, res->f_attr, res->server);
6678 out:
6679         return status;
6680 }
6681
6682 /*
6683  * Decode SETATTR response
6684  */
6685 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6686                                 struct xdr_stream *xdr,
6687                                 void *data)
6688 {
6689         struct nfs_setattrres *res = data;
6690         struct compound_hdr hdr;
6691         int status;
6692
6693         status = decode_compound_hdr(xdr, &hdr);
6694         if (status)
6695                 goto out;
6696         status = decode_sequence(xdr, &res->seq_res, rqstp);
6697         if (status)
6698                 goto out;
6699         status = decode_putfh(xdr);
6700         if (status)
6701                 goto out;
6702         status = decode_setattr(xdr);
6703         if (status)
6704                 goto out;
6705         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6706 out:
6707         return status;
6708 }
6709
6710 /*
6711  * Decode LOCK response
6712  */
6713 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6714                              void *data)
6715 {
6716         struct nfs_lock_res *res = data;
6717         struct compound_hdr hdr;
6718         int status;
6719
6720         status = decode_compound_hdr(xdr, &hdr);
6721         if (status)
6722                 goto out;
6723         status = decode_sequence(xdr, &res->seq_res, rqstp);
6724         if (status)
6725                 goto out;
6726         status = decode_putfh(xdr);
6727         if (status)
6728                 goto out;
6729         status = decode_lock(xdr, res);
6730 out:
6731         return status;
6732 }
6733
6734 /*
6735  * Decode LOCKT response
6736  */
6737 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6738                               void *data)
6739 {
6740         struct nfs_lockt_res *res = data;
6741         struct compound_hdr hdr;
6742         int status;
6743
6744         status = decode_compound_hdr(xdr, &hdr);
6745         if (status)
6746                 goto out;
6747         status = decode_sequence(xdr, &res->seq_res, rqstp);
6748         if (status)
6749                 goto out;
6750         status = decode_putfh(xdr);
6751         if (status)
6752                 goto out;
6753         status = decode_lockt(xdr, res);
6754 out:
6755         return status;
6756 }
6757
6758 /*
6759  * Decode LOCKU response
6760  */
6761 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6762                               void *data)
6763 {
6764         struct nfs_locku_res *res = data;
6765         struct compound_hdr hdr;
6766         int status;
6767
6768         status = decode_compound_hdr(xdr, &hdr);
6769         if (status)
6770                 goto out;
6771         status = decode_sequence(xdr, &res->seq_res, rqstp);
6772         if (status)
6773                 goto out;
6774         status = decode_putfh(xdr);
6775         if (status)
6776                 goto out;
6777         status = decode_locku(xdr, res);
6778 out:
6779         return status;
6780 }
6781
6782 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6783                                           struct xdr_stream *xdr, void *dummy)
6784 {
6785         struct compound_hdr hdr;
6786         int status;
6787
6788         status = decode_compound_hdr(xdr, &hdr);
6789         if (!status)
6790                 status = decode_release_lockowner(xdr);
6791         return status;
6792 }
6793
6794 /*
6795  * Decode READLINK response
6796  */
6797 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6798                                  struct xdr_stream *xdr,
6799                                  void *data)
6800 {
6801         struct nfs4_readlink_res *res = data;
6802         struct compound_hdr hdr;
6803         int status;
6804
6805         status = decode_compound_hdr(xdr, &hdr);
6806         if (status)
6807                 goto out;
6808         status = decode_sequence(xdr, &res->seq_res, rqstp);
6809         if (status)
6810                 goto out;
6811         status = decode_putfh(xdr);
6812         if (status)
6813                 goto out;
6814         status = decode_readlink(xdr, rqstp);
6815 out:
6816         return status;
6817 }
6818
6819 /*
6820  * Decode READDIR response
6821  */
6822 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6823                                 void *data)
6824 {
6825         struct nfs4_readdir_res *res = data;
6826         struct compound_hdr hdr;
6827         int status;
6828
6829         status = decode_compound_hdr(xdr, &hdr);
6830         if (status)
6831                 goto out;
6832         status = decode_sequence(xdr, &res->seq_res, rqstp);
6833         if (status)
6834                 goto out;
6835         status = decode_putfh(xdr);
6836         if (status)
6837                 goto out;
6838         status = decode_readdir(xdr, rqstp, res);
6839 out:
6840         return status;
6841 }
6842
6843 /*
6844  * Decode Read response
6845  */
6846 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6847                              void *data)
6848 {
6849         struct nfs_pgio_res *res = data;
6850         struct compound_hdr hdr;
6851         int status;
6852
6853         status = decode_compound_hdr(xdr, &hdr);
6854         res->op_status = hdr.status;
6855         if (status)
6856                 goto out;
6857         status = decode_sequence(xdr, &res->seq_res, rqstp);
6858         if (status)
6859                 goto out;
6860         status = decode_putfh(xdr);
6861         if (status)
6862                 goto out;
6863         status = decode_read(xdr, rqstp, res);
6864         if (!status)
6865                 status = res->count;
6866 out:
6867         return status;
6868 }
6869
6870 /*
6871  * Decode WRITE response
6872  */
6873 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6874                               void *data)
6875 {
6876         struct nfs_pgio_res *res = data;
6877         struct compound_hdr hdr;
6878         int status;
6879
6880         status = decode_compound_hdr(xdr, &hdr);
6881         res->op_status = hdr.status;
6882         if (status)
6883                 goto out;
6884         status = decode_sequence(xdr, &res->seq_res, rqstp);
6885         if (status)
6886                 goto out;
6887         status = decode_putfh(xdr);
6888         if (status)
6889                 goto out;
6890         status = decode_write(xdr, res);
6891         if (status)
6892                 goto out;
6893         if (res->fattr)
6894                 decode_getfattr(xdr, res->fattr, res->server);
6895         if (!status)
6896                 status = res->count;
6897 out:
6898         return status;
6899 }
6900
6901 /*
6902  * Decode COMMIT response
6903  */
6904 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6905                                void *data)
6906 {
6907         struct nfs_commitres *res = data;
6908         struct compound_hdr hdr;
6909         int status;
6910
6911         status = decode_compound_hdr(xdr, &hdr);
6912         res->op_status = hdr.status;
6913         if (status)
6914                 goto out;
6915         status = decode_sequence(xdr, &res->seq_res, rqstp);
6916         if (status)
6917                 goto out;
6918         status = decode_putfh(xdr);
6919         if (status)
6920                 goto out;
6921         status = decode_commit(xdr, res);
6922 out:
6923         return status;
6924 }
6925
6926 /*
6927  * Decode FSINFO response
6928  */
6929 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6930                                void *data)
6931 {
6932         struct nfs4_fsinfo_res *res = data;
6933         struct compound_hdr hdr;
6934         int status;
6935
6936         status = decode_compound_hdr(xdr, &hdr);
6937         if (!status)
6938                 status = decode_sequence(xdr, &res->seq_res, req);
6939         if (!status)
6940                 status = decode_putfh(xdr);
6941         if (!status)
6942                 status = decode_fsinfo(xdr, res->fsinfo);
6943         return status;
6944 }
6945
6946 /*
6947  * Decode PATHCONF response
6948  */
6949 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6950                                  void *data)
6951 {
6952         struct nfs4_pathconf_res *res = data;
6953         struct compound_hdr hdr;
6954         int status;
6955
6956         status = decode_compound_hdr(xdr, &hdr);
6957         if (!status)
6958                 status = decode_sequence(xdr, &res->seq_res, req);
6959         if (!status)
6960                 status = decode_putfh(xdr);
6961         if (!status)
6962                 status = decode_pathconf(xdr, res->pathconf);
6963         return status;
6964 }
6965
6966 /*
6967  * Decode STATFS response
6968  */
6969 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6970                                void *data)
6971 {
6972         struct nfs4_statfs_res *res = data;
6973         struct compound_hdr hdr;
6974         int status;
6975
6976         status = decode_compound_hdr(xdr, &hdr);
6977         if (!status)
6978                 status = decode_sequence(xdr, &res->seq_res, req);
6979         if (!status)
6980                 status = decode_putfh(xdr);
6981         if (!status)
6982                 status = decode_statfs(xdr, res->fsstat);
6983         return status;
6984 }
6985
6986 /*
6987  * Decode GETATTR_BITMAP response
6988  */
6989 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6990                                     struct xdr_stream *xdr,
6991                                     void *data)
6992 {
6993         struct nfs4_server_caps_res *res = data;
6994         struct compound_hdr hdr;
6995         int status;
6996
6997         status = decode_compound_hdr(xdr, &hdr);
6998         if (status)
6999                 goto out;
7000         status = decode_sequence(xdr, &res->seq_res, req);
7001         if (status)
7002                 goto out;
7003         status = decode_putfh(xdr);
7004         if (status)
7005                 goto out;
7006         status = decode_server_caps(xdr, res);
7007 out:
7008         return status;
7009 }
7010
7011 /*
7012  * Decode RENEW response
7013  */
7014 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7015                               void *__unused)
7016 {
7017         struct compound_hdr hdr;
7018         int status;
7019
7020         status = decode_compound_hdr(xdr, &hdr);
7021         if (!status)
7022                 status = decode_renew(xdr);
7023         return status;
7024 }
7025
7026 /*
7027  * Decode SETCLIENTID response
7028  */
7029 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7030                                     struct xdr_stream *xdr,
7031                                     void *data)
7032 {
7033         struct nfs4_setclientid_res *res = data;
7034         struct compound_hdr hdr;
7035         int status;
7036
7037         status = decode_compound_hdr(xdr, &hdr);
7038         if (!status)
7039                 status = decode_setclientid(xdr, res);
7040         return status;
7041 }
7042
7043 /*
7044  * Decode SETCLIENTID_CONFIRM response
7045  */
7046 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7047                                             struct xdr_stream *xdr,
7048                                             void *data)
7049 {
7050         struct compound_hdr hdr;
7051         int status;
7052
7053         status = decode_compound_hdr(xdr, &hdr);
7054         if (!status)
7055                 status = decode_setclientid_confirm(xdr);
7056         return status;
7057 }
7058
7059 /*
7060  * Decode DELEGRETURN response
7061  */
7062 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7063                                     struct xdr_stream *xdr,
7064                                     void *data)
7065 {
7066         struct nfs4_delegreturnres *res = data;
7067         struct compound_hdr hdr;
7068         int status;
7069
7070         status = decode_compound_hdr(xdr, &hdr);
7071         if (status)
7072                 goto out;
7073         status = decode_sequence(xdr, &res->seq_res, rqstp);
7074         if (status)
7075                 goto out;
7076         status = decode_putfh(xdr);
7077         if (status != 0)
7078                 goto out;
7079         if (res->lr_res) {
7080                 status = decode_layoutreturn(xdr, res->lr_res);
7081                 res->lr_ret = status;
7082                 if (status)
7083                         goto out;
7084         }
7085         if (res->fattr) {
7086                 status = decode_getfattr(xdr, res->fattr, res->server);
7087                 if (status != 0)
7088                         goto out;
7089         }
7090         status = decode_delegreturn(xdr);
7091 out:
7092         return status;
7093 }
7094
7095 /*
7096  * Decode FS_LOCATIONS response
7097  */
7098 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7099                                      struct xdr_stream *xdr,
7100                                      void *data)
7101 {
7102         struct nfs4_fs_locations_res *res = data;
7103         struct compound_hdr hdr;
7104         int status;
7105
7106         status = decode_compound_hdr(xdr, &hdr);
7107         if (status)
7108                 goto out;
7109         status = decode_sequence(xdr, &res->seq_res, req);
7110         if (status)
7111                 goto out;
7112         status = decode_putfh(xdr);
7113         if (status)
7114                 goto out;
7115         if (res->migration) {
7116                 xdr_enter_page(xdr, PAGE_SIZE);
7117                 status = decode_getfattr_generic(xdr,
7118                                         &res->fs_locations->fattr,
7119                                          NULL, res->fs_locations,
7120                                          NULL, res->fs_locations->server);
7121                 if (status)
7122                         goto out;
7123                 if (res->renew)
7124                         status = decode_renew(xdr);
7125         } else {
7126                 status = decode_lookup(xdr);
7127                 if (status)
7128                         goto out;
7129                 xdr_enter_page(xdr, PAGE_SIZE);
7130                 status = decode_getfattr_generic(xdr,
7131                                         &res->fs_locations->fattr,
7132                                          NULL, res->fs_locations,
7133                                          NULL, res->fs_locations->server);
7134         }
7135 out:
7136         return status;
7137 }
7138
7139 /*
7140  * Decode SECINFO response
7141  */
7142 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7143                                 struct xdr_stream *xdr,
7144                                 void *data)
7145 {
7146         struct nfs4_secinfo_res *res = data;
7147         struct compound_hdr hdr;
7148         int status;
7149
7150         status = decode_compound_hdr(xdr, &hdr);
7151         if (status)
7152                 goto out;
7153         status = decode_sequence(xdr, &res->seq_res, rqstp);
7154         if (status)
7155                 goto out;
7156         status = decode_putfh(xdr);
7157         if (status)
7158                 goto out;
7159         status = decode_secinfo(xdr, res);
7160 out:
7161         return status;
7162 }
7163
7164 /*
7165  * Decode FSID_PRESENT response
7166  */
7167 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7168                                      struct xdr_stream *xdr,
7169                                      void *data)
7170 {
7171         struct nfs4_fsid_present_res *res = data;
7172         struct compound_hdr hdr;
7173         int status;
7174
7175         status = decode_compound_hdr(xdr, &hdr);
7176         if (status)
7177                 goto out;
7178         status = decode_sequence(xdr, &res->seq_res, rqstp);
7179         if (status)
7180                 goto out;
7181         status = decode_putfh(xdr);
7182         if (status)
7183                 goto out;
7184         status = decode_getfh(xdr, res->fh);
7185         if (status)
7186                 goto out;
7187         if (res->renew)
7188                 status = decode_renew(xdr);
7189 out:
7190         return status;
7191 }
7192
7193 #if defined(CONFIG_NFS_V4_1)
7194 /*
7195  * Decode BIND_CONN_TO_SESSION response
7196  */
7197 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7198                                         struct xdr_stream *xdr,
7199                                         void *res)
7200 {
7201         struct compound_hdr hdr;
7202         int status;
7203
7204         status = decode_compound_hdr(xdr, &hdr);
7205         if (!status)
7206                 status = decode_bind_conn_to_session(xdr, res);
7207         return status;
7208 }
7209
7210 /*
7211  * Decode EXCHANGE_ID response
7212  */
7213 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7214                                     struct xdr_stream *xdr,
7215                                     void *res)
7216 {
7217         struct compound_hdr hdr;
7218         int status;
7219
7220         status = decode_compound_hdr(xdr, &hdr);
7221         if (!status)
7222                 status = decode_exchange_id(xdr, res);
7223         return status;
7224 }
7225
7226 /*
7227  * Decode CREATE_SESSION response
7228  */
7229 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7230                                        struct xdr_stream *xdr,
7231                                        void *res)
7232 {
7233         struct compound_hdr hdr;
7234         int status;
7235
7236         status = decode_compound_hdr(xdr, &hdr);
7237         if (!status)
7238                 status = decode_create_session(xdr, res);
7239         return status;
7240 }
7241
7242 /*
7243  * Decode DESTROY_SESSION response
7244  */
7245 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7246                                         struct xdr_stream *xdr,
7247                                         void *res)
7248 {
7249         struct compound_hdr hdr;
7250         int status;
7251
7252         status = decode_compound_hdr(xdr, &hdr);
7253         if (!status)
7254                 status = decode_destroy_session(xdr, res);
7255         return status;
7256 }
7257
7258 /*
7259  * Decode DESTROY_CLIENTID response
7260  */
7261 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7262                                         struct xdr_stream *xdr,
7263                                         void *res)
7264 {
7265         struct compound_hdr hdr;
7266         int status;
7267
7268         status = decode_compound_hdr(xdr, &hdr);
7269         if (!status)
7270                 status = decode_destroy_clientid(xdr, res);
7271         return status;
7272 }
7273
7274 /*
7275  * Decode SEQUENCE response
7276  */
7277 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7278                                  struct xdr_stream *xdr,
7279                                  void *res)
7280 {
7281         struct compound_hdr hdr;
7282         int status;
7283
7284         status = decode_compound_hdr(xdr, &hdr);
7285         if (!status)
7286                 status = decode_sequence(xdr, res, rqstp);
7287         return status;
7288 }
7289
7290 /*
7291  * Decode GET_LEASE_TIME response
7292  */
7293 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7294                                        struct xdr_stream *xdr,
7295                                        void *data)
7296 {
7297         struct nfs4_get_lease_time_res *res = data;
7298         struct compound_hdr hdr;
7299         int status;
7300
7301         status = decode_compound_hdr(xdr, &hdr);
7302         if (!status)
7303                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7304         if (!status)
7305                 status = decode_putrootfh(xdr);
7306         if (!status)
7307                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7308         return status;
7309 }
7310
7311 /*
7312  * Decode RECLAIM_COMPLETE response
7313  */
7314 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7315                                          struct xdr_stream *xdr,
7316                                          void *data)
7317 {
7318         struct nfs41_reclaim_complete_res *res = data;
7319         struct compound_hdr hdr;
7320         int status;
7321
7322         status = decode_compound_hdr(xdr, &hdr);
7323         if (!status)
7324                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7325         if (!status)
7326                 status = decode_reclaim_complete(xdr, NULL);
7327         return status;
7328 }
7329
7330 /*
7331  * Decode GETDEVINFO response
7332  */
7333 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7334                                       struct xdr_stream *xdr,
7335                                       void *data)
7336 {
7337         struct nfs4_getdeviceinfo_res *res = data;
7338         struct compound_hdr hdr;
7339         int status;
7340
7341         status = decode_compound_hdr(xdr, &hdr);
7342         if (status != 0)
7343                 goto out;
7344         status = decode_sequence(xdr, &res->seq_res, rqstp);
7345         if (status != 0)
7346                 goto out;
7347         status = decode_getdeviceinfo(xdr, res);
7348 out:
7349         return status;
7350 }
7351
7352 /*
7353  * Decode LAYOUTGET response
7354  */
7355 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7356                                   struct xdr_stream *xdr,
7357                                   void *data)
7358 {
7359         struct nfs4_layoutget_res *res = data;
7360         struct compound_hdr hdr;
7361         int status;
7362
7363         status = decode_compound_hdr(xdr, &hdr);
7364         if (status)
7365                 goto out;
7366         status = decode_sequence(xdr, &res->seq_res, rqstp);
7367         if (status)
7368                 goto out;
7369         status = decode_putfh(xdr);
7370         if (status)
7371                 goto out;
7372         status = decode_layoutget(xdr, rqstp, res);
7373 out:
7374         return status;
7375 }
7376
7377 /*
7378  * Decode LAYOUTRETURN response
7379  */
7380 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7381                                      struct xdr_stream *xdr,
7382                                      void *data)
7383 {
7384         struct nfs4_layoutreturn_res *res = data;
7385         struct compound_hdr hdr;
7386         int status;
7387
7388         status = decode_compound_hdr(xdr, &hdr);
7389         if (status)
7390                 goto out;
7391         status = decode_sequence(xdr, &res->seq_res, rqstp);
7392         if (status)
7393                 goto out;
7394         status = decode_putfh(xdr);
7395         if (status)
7396                 goto out;
7397         status = decode_layoutreturn(xdr, res);
7398 out:
7399         return status;
7400 }
7401
7402 /*
7403  * Decode LAYOUTCOMMIT response
7404  */
7405 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7406                                      struct xdr_stream *xdr,
7407                                      void *data)
7408 {
7409         struct nfs4_layoutcommit_res *res = data;
7410         struct compound_hdr hdr;
7411         int status;
7412
7413         status = decode_compound_hdr(xdr, &hdr);
7414         if (status)
7415                 goto out;
7416         status = decode_sequence(xdr, &res->seq_res, rqstp);
7417         if (status)
7418                 goto out;
7419         status = decode_putfh(xdr);
7420         if (status)
7421                 goto out;
7422         status = decode_layoutcommit(xdr, rqstp, res);
7423         if (status)
7424                 goto out;
7425         decode_getfattr(xdr, res->fattr, res->server);
7426 out:
7427         return status;
7428 }
7429
7430 /*
7431  * Decode SECINFO_NO_NAME response
7432  */
7433 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7434                                         struct xdr_stream *xdr,
7435                                         void *data)
7436 {
7437         struct nfs4_secinfo_res *res = data;
7438         struct compound_hdr hdr;
7439         int status;
7440
7441         status = decode_compound_hdr(xdr, &hdr);
7442         if (status)
7443                 goto out;
7444         status = decode_sequence(xdr, &res->seq_res, rqstp);
7445         if (status)
7446                 goto out;
7447         status = decode_putrootfh(xdr);
7448         if (status)
7449                 goto out;
7450         status = decode_secinfo_no_name(xdr, res);
7451 out:
7452         return status;
7453 }
7454
7455 /*
7456  * Decode TEST_STATEID response
7457  */
7458 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7459                                      struct xdr_stream *xdr,
7460                                      void *data)
7461 {
7462         struct nfs41_test_stateid_res *res = data;
7463         struct compound_hdr hdr;
7464         int status;
7465
7466         status = decode_compound_hdr(xdr, &hdr);
7467         if (status)
7468                 goto out;
7469         status = decode_sequence(xdr, &res->seq_res, rqstp);
7470         if (status)
7471                 goto out;
7472         status = decode_test_stateid(xdr, res);
7473 out:
7474         return status;
7475 }
7476
7477 /*
7478  * Decode FREE_STATEID response
7479  */
7480 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7481                                      struct xdr_stream *xdr,
7482                                      void *data)
7483 {
7484         struct nfs41_free_stateid_res *res = data;
7485         struct compound_hdr hdr;
7486         int status;
7487
7488         status = decode_compound_hdr(xdr, &hdr);
7489         if (status)
7490                 goto out;
7491         status = decode_sequence(xdr, &res->seq_res, rqstp);
7492         if (status)
7493                 goto out;
7494         status = decode_free_stateid(xdr, res);
7495 out:
7496         return status;
7497 }
7498 #endif /* CONFIG_NFS_V4_1 */
7499
7500 /**
7501  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7502  *                      the local page cache.
7503  * @xdr: XDR stream where entry resides
7504  * @entry: buffer to fill in with entry data
7505  * @plus: boolean indicating whether this should be a readdirplus entry
7506  *
7507  * Returns zero if successful, otherwise a negative errno value is
7508  * returned.
7509  *
7510  * This function is not invoked during READDIR reply decoding, but
7511  * rather whenever an application invokes the getdents(2) system call
7512  * on a directory already in our cache.
7513  */
7514 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7515                        bool plus)
7516 {
7517         unsigned int savep;
7518         uint32_t bitmap[3] = {0};
7519         uint32_t len;
7520         uint64_t new_cookie;
7521         __be32 *p = xdr_inline_decode(xdr, 4);
7522         if (unlikely(!p))
7523                 goto out_overflow;
7524         if (*p == xdr_zero) {
7525                 p = xdr_inline_decode(xdr, 4);
7526                 if (unlikely(!p))
7527                         goto out_overflow;
7528                 if (*p == xdr_zero)
7529                         return -EAGAIN;
7530                 entry->eof = 1;
7531                 return -EBADCOOKIE;
7532         }
7533
7534         p = xdr_inline_decode(xdr, 12);
7535         if (unlikely(!p))
7536                 goto out_overflow;
7537         p = xdr_decode_hyper(p, &new_cookie);
7538         entry->len = be32_to_cpup(p);
7539
7540         p = xdr_inline_decode(xdr, entry->len);
7541         if (unlikely(!p))
7542                 goto out_overflow;
7543         entry->name = (const char *) p;
7544
7545         /*
7546          * In case the server doesn't return an inode number,
7547          * we fake one here.  (We don't use inode number 0,
7548          * since glibc seems to choke on it...)
7549          */
7550         entry->ino = 1;
7551         entry->fattr->valid = 0;
7552
7553         if (decode_attr_bitmap(xdr, bitmap) < 0)
7554                 goto out_overflow;
7555
7556         if (decode_attr_length(xdr, &len, &savep) < 0)
7557                 goto out_overflow;
7558
7559         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7560                         NULL, entry->label, entry->server) < 0)
7561                 goto out_overflow;
7562         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7563                 entry->ino = entry->fattr->mounted_on_fileid;
7564         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7565                 entry->ino = entry->fattr->fileid;
7566
7567         entry->d_type = DT_UNKNOWN;
7568         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7569                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7570
7571         entry->prev_cookie = entry->cookie;
7572         entry->cookie = new_cookie;
7573
7574         return 0;
7575
7576 out_overflow:
7577         print_overflow_msg(__func__, xdr);
7578         return -EAGAIN;
7579 }
7580
7581 /*
7582  * We need to translate between nfs status return values and
7583  * the local errno values which may not be the same.
7584  */
7585 static struct {
7586         int stat;
7587         int errno;
7588 } nfs_errtbl[] = {
7589         { NFS4_OK,              0               },
7590         { NFS4ERR_PERM,         -EPERM          },
7591         { NFS4ERR_NOENT,        -ENOENT         },
7592         { NFS4ERR_IO,           -errno_NFSERR_IO},
7593         { NFS4ERR_NXIO,         -ENXIO          },
7594         { NFS4ERR_ACCESS,       -EACCES         },
7595         { NFS4ERR_EXIST,        -EEXIST         },
7596         { NFS4ERR_XDEV,         -EXDEV          },
7597         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7598         { NFS4ERR_ISDIR,        -EISDIR         },
7599         { NFS4ERR_INVAL,        -EINVAL         },
7600         { NFS4ERR_FBIG,         -EFBIG          },
7601         { NFS4ERR_NOSPC,        -ENOSPC         },
7602         { NFS4ERR_ROFS,         -EROFS          },
7603         { NFS4ERR_MLINK,        -EMLINK         },
7604         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7605         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7606         { NFS4ERR_DQUOT,        -EDQUOT         },
7607         { NFS4ERR_STALE,        -ESTALE         },
7608         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7609         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7610         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7611         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7612         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7613         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7614         { NFS4ERR_LOCKED,       -EAGAIN         },
7615         { NFS4ERR_SYMLINK,      -ELOOP          },
7616         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7617         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7618         { -1,                   -EIO            }
7619 };
7620
7621 /*
7622  * Convert an NFS error code to a local one.
7623  * This one is used jointly by NFSv2 and NFSv3.
7624  */
7625 static int
7626 nfs4_stat_to_errno(int stat)
7627 {
7628         int i;
7629         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7630                 if (nfs_errtbl[i].stat == stat)
7631                         return nfs_errtbl[i].errno;
7632         }
7633         if (stat <= 10000 || stat > 10100) {
7634                 /* The server is looney tunes. */
7635                 return -EREMOTEIO;
7636         }
7637         /* If we cannot translate the error, the recovery routines should
7638          * handle it.
7639          * Note: remaining NFSv4 error codes have values > 10000, so should
7640          * not conflict with native Linux error codes.
7641          */
7642         return -stat;
7643 }
7644
7645 #ifdef CONFIG_NFS_V4_2
7646 #include "nfs42xdr.c"
7647 #endif /* CONFIG_NFS_V4_2 */
7648
7649 #define PROC(proc, argtype, restype)                            \
7650 [NFSPROC4_CLNT_##proc] = {                                      \
7651         .p_proc   = NFSPROC4_COMPOUND,                          \
7652         .p_encode = nfs4_xdr_##argtype,                         \
7653         .p_decode = nfs4_xdr_##restype,                         \
7654         .p_arglen = NFS4_##argtype##_sz,                        \
7655         .p_replen = NFS4_##restype##_sz,                        \
7656         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7657         .p_name   = #proc,                                      \
7658 }
7659
7660 #define STUB(proc)              \
7661 [NFSPROC4_CLNT_##proc] = {      \
7662         .p_name = #proc,        \
7663 }
7664
7665 #if defined(CONFIG_NFS_V4_1)
7666 #define PROC41(proc, argtype, restype)                          \
7667         PROC(proc, argtype, restype)
7668 #else
7669 #define PROC41(proc, argtype, restype)                          \
7670         STUB(proc)
7671 #endif
7672
7673 #if defined(CONFIG_NFS_V4_2)
7674 #define PROC42(proc, argtype, restype)                          \
7675         PROC(proc, argtype, restype)
7676 #else
7677 #define PROC42(proc, argtype, restype)                          \
7678         STUB(proc)
7679 #endif
7680
7681 const struct rpc_procinfo nfs4_procedures[] = {
7682         PROC(READ,              enc_read,               dec_read),
7683         PROC(WRITE,             enc_write,              dec_write),
7684         PROC(COMMIT,            enc_commit,             dec_commit),
7685         PROC(OPEN,              enc_open,               dec_open),
7686         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7687         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7688         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7689         PROC(CLOSE,             enc_close,              dec_close),
7690         PROC(SETATTR,           enc_setattr,            dec_setattr),
7691         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7692         PROC(RENEW,             enc_renew,              dec_renew),
7693         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7694         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7695         PROC(LOCK,              enc_lock,               dec_lock),
7696         PROC(LOCKT,             enc_lockt,              dec_lockt),
7697         PROC(LOCKU,             enc_locku,              dec_locku),
7698         PROC(ACCESS,            enc_access,             dec_access),
7699         PROC(GETATTR,           enc_getattr,            dec_getattr),
7700         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7701         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7702         PROC(REMOVE,            enc_remove,             dec_remove),
7703         PROC(RENAME,            enc_rename,             dec_rename),
7704         PROC(LINK,              enc_link,               dec_link),
7705         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7706         PROC(CREATE,            enc_create,             dec_create),
7707         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7708         PROC(STATFS,            enc_statfs,             dec_statfs),
7709         PROC(READLINK,          enc_readlink,           dec_readlink),
7710         PROC(READDIR,           enc_readdir,            dec_readdir),
7711         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7712         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7713         PROC(GETACL,            enc_getacl,             dec_getacl),
7714         PROC(SETACL,            enc_setacl,             dec_setacl),
7715         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7716         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7717         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7718         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7719         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7720         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7721         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7722         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7723         PROC41(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
7724         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7725         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7726         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7727         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7728         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7729         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7730         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7731         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7732         STUB(GETDEVICELIST),
7733         PROC41(BIND_CONN_TO_SESSION,
7734                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7735         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7736         PROC42(SEEK,            enc_seek,               dec_seek),
7737         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7738         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7739         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7740         PROC42(CLONE,           enc_clone,              dec_clone),
7741         PROC42(COPY,            enc_copy,               dec_copy),
7742         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7743 };
7744
7745 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7746 const struct rpc_version nfs_version4 = {
7747         .number                 = 4,
7748         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7749         .procs                  = nfs4_procedures,
7750         .counts                 = nfs_version4_counts,
7751 };
7752
7753 /*
7754  * Local variables:
7755  *  c-basic-offset: 8
7756  * End:
7757  */