fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/nfs_idmap.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "internal.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 nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108 #define encode_readdir_space 24
 109 #define encode_readdir_bitmask_sz 3
 110 #else
 111 #define nfs4_label_maxsz        0
 112 #define encode_readdir_space 20
 113 #define encode_readdir_bitmask_sz 2
 114 #endif
 115 /* We support only one layout type per file system */
 116 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 117 /* This is based on getfattr, which uses the most attributes: */
 118 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 119                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 120                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 121                                  decode_mdsthreshold_maxsz))
 122 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 123                                 nfs4_fattr_value_maxsz)
 124 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 125 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 126                                  1 + 2 + 1 + \
 127                                 nfs4_owner_maxsz + \
 128                                 nfs4_group_maxsz + \
 129                                 nfs4_label_maxsz + \
 130                                 4 + 4)
 131 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 132 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 133 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 134 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 135 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 136 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 137  * layout types will be returned.
 138  */
 139 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 140                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 141 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 142 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 143 #define encode_setclientid_maxsz \
 144                                 (op_encode_hdr_maxsz + \
 145                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 146                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 147                                 1 /* sc_prog */ + \
 148                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 149                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 150                                 1) /* sc_cb_ident */
 151 #define decode_setclientid_maxsz \
 152                                 (op_decode_hdr_maxsz + \
 153                                 2 + \
 154                                 1024) /* large value for CLID_INUSE */
 155 #define encode_setclientid_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 158 #define decode_setclientid_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz)
 160 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 161 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 162 #define encode_share_access_maxsz \
 163                                 (2)
 164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 165 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 167 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 168                                 2 + encode_share_access_maxsz + 2 + \
 169                                 open_owner_id_maxsz + \
 170                                 encode_opentype_maxsz + \
 171                                 encode_claim_null_maxsz)
 172 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 174                                 decode_ace_maxsz)
 175 #define decode_change_info_maxsz        (5)
 176 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 177                                 decode_stateid_maxsz + \
 178                                 decode_change_info_maxsz + 1 + \
 179                                 nfs4_fattr_bitmap_maxsz + \
 180                                 decode_delegation_maxsz)
 181 #define encode_open_confirm_maxsz \
 182                                 (op_encode_hdr_maxsz + \
 183                                  encode_stateid_maxsz + 1)
 184 #define decode_open_confirm_maxsz \
 185                                 (op_decode_hdr_maxsz + \
 186                                  decode_stateid_maxsz)
 187 #define encode_open_downgrade_maxsz \
 188                                 (op_encode_hdr_maxsz + \
 189                                  encode_stateid_maxsz + 1 + \
 190                                  encode_share_access_maxsz)
 191 #define decode_open_downgrade_maxsz \
 192                                 (op_decode_hdr_maxsz + \
 193                                  decode_stateid_maxsz)
 194 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 195                                  1 + encode_stateid_maxsz)
 196 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 197                                  decode_stateid_maxsz)
 198 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 199                                  encode_stateid_maxsz + \
 200                                  encode_attrs_maxsz)
 201 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 202                                  nfs4_fattr_bitmap_maxsz)
 203 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 204                                  encode_stateid_maxsz + 3)
 205 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 206 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 207                                  2 + encode_verifier_maxsz + 5 + \
 208                                 nfs4_label_maxsz)
 209 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 210                                  decode_verifier_maxsz + \
 211                                 nfs4_label_maxsz + nfs4_fattr_maxsz)
 212 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 213 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 214 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 215                                  encode_stateid_maxsz + 4)
 216 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 217                                  2 + decode_verifier_maxsz)
 218 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 219 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 220                                  decode_verifier_maxsz)
 221 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 222                                 nfs4_name_maxsz)
 223 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 224                                  decode_change_info_maxsz)
 225 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 226                                 2 * nfs4_name_maxsz)
 227 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 228                                  decode_change_info_maxsz + \
 229                                  decode_change_info_maxsz)
 230 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 231                                 nfs4_name_maxsz)
 232 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 233 #define encode_lockowner_maxsz  (7)
 234 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 235                                  7 + \
 236                                  1 + encode_stateid_maxsz + 1 + \
 237                                  encode_lockowner_maxsz)
 238 #define decode_lock_denied_maxsz \
 239                                 (8 + decode_lockowner_maxsz)
 240 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 241                                  decode_lock_denied_maxsz)
 242 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 243                                 encode_lockowner_maxsz)
 244 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 245                                  decode_lock_denied_maxsz)
 246 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 247                                  encode_stateid_maxsz + \
 248                                  4)
 249 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 250                                  decode_stateid_maxsz)
 251 #define encode_release_lockowner_maxsz \
 252                                 (op_encode_hdr_maxsz + \
 253                                  encode_lockowner_maxsz)
 254 #define decode_release_lockowner_maxsz \
 255                                 (op_decode_hdr_maxsz)
 256 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 257 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 258 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 259                                 1 + nfs4_name_maxsz + \
 260                                 1 + \
 261                                 nfs4_fattr_maxsz)
 262 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 263 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 264                                 1 + 2 + nfs4_name_maxsz + \
 265                                 encode_attrs_maxsz)
 266 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 267                                 decode_change_info_maxsz + \
 268                                 nfs4_fattr_bitmap_maxsz)
 269 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 270 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 271 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 272 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 273 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 274 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 275                                  nfs4_fattr_bitmap_maxsz + 1)
 276 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 277                                  encode_stateid_maxsz + 3)
 278 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 279 #define encode_fs_locations_maxsz \
 280                                 (encode_getattr_maxsz)
 281 #define decode_fs_locations_maxsz \
 282                                 (0)
 283 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 284 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 285
 286 #if defined(CONFIG_NFS_V4_1)
 287 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 288 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 289                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 290
 291 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 292                                 encode_verifier_maxsz + \
 293                                 1 /* co_ownerid.len */ + \
 294                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 295                                 1 /* flags */ + \
 296                                 1 /* spa_how */ + \
 297                                 0 /* SP4_NONE (for now) */ + \
 298                                 1 /* implementation id array of size 1 */ + \
 299                                 1 /* nii_domain */ + \
 300                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 301                                 1 /* nii_name */ + \
 302                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 303                                 3 /* nii_date */)
 304 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 305                                 2 /* eir_clientid */ + \
 306                                 1 /* eir_sequenceid */ + \
 307                                 1 /* eir_flags */ + \
 308                                 1 /* spr_how */ + \
 309                                 0 /* SP4_NONE (for now) */ + \
 310                                 2 /* eir_server_owner.so_minor_id */ + \
 311                                 /* eir_server_owner.so_major_id<> */ \
 312                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 313                                 /* eir_server_scope<> */ \
 314                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 315                                 1 /* eir_server_impl_id array length */ + \
 316                                 1 /* nii_domain */ + \
 317                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 318                                 1 /* nii_name */ + \
 319                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 320                                 3 /* nii_date */)
 321 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 322 #define decode_channel_attrs_maxsz  (6 + \
 323                                      1 /* ca_rdma_ird.len */ + \
 324                                      1 /* ca_rdma_ird */)
 325 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 326                                      2 /* csa_clientid */ + \
 327                                      1 /* csa_sequence */ + \
 328                                      1 /* csa_flags */ + \
 329                                      encode_channel_attrs_maxsz + \
 330                                      encode_channel_attrs_maxsz + \
 331                                      1 /* csa_cb_program */ + \
 332                                      1 /* csa_sec_parms.len (1) */ + \
 333                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 334                                      1 /* stamp */ + \
 335                                      1 /* machinename.len */ + \
 336                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 337                                      1 /* uid */ + \
 338                                      1 /* gid */ + \
 339                                      1 /* gids.len (0) */)
 340 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 341                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 342                                      1 /* csr_sequence */ + \
 343                                      1 /* csr_flags */ + \
 344                                      decode_channel_attrs_maxsz + \
 345                                      decode_channel_attrs_maxsz)
 346 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 347                                      /* bctsa_sessid */ \
 348                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 349                                      1 /* bctsa_dir */ + \
 350                                      1 /* bctsa_use_conn_in_rdma_mode */)
 351 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 352                                      /* bctsr_sessid */ \
 353                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 354                                      1 /* bctsr_dir */ + \
 355                                      1 /* bctsr_use_conn_in_rdma_mode */)
 356 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 357 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 358 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 359 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 360 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 361                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 362 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 363                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 364 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 365 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 366 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 367                                 encode_verifier_maxsz)
 368 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 369                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 370                                 decode_verifier_maxsz \
 371                                   /* verifier4 gdlr_verifier */ + \
 372                                 1 /* gdlr_deviceid_list count */ + \
 373                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 374                                             NFS4_DEVICEID4_SIZE) \
 375                                   /* gdlr_deviceid_list */ + \
 376                                 1 /* bool gdlr_eof */)
 377 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 378                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 379 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 380                                 1 /* layout type */ + \
 381                                 1 /* opaque devaddr4 length */ + \
 382                                   /* devaddr4 payload is read into page */ \
 383                                 1 /* notification bitmap length */ + \
 384                                 1 /* notification bitmap */)
 385 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 386                                 encode_stateid_maxsz)
 387 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 388                                 decode_stateid_maxsz + \
 389                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 390 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 391                                 2 /* offset */ + \
 392                                 2 /* length */ + \
 393                                 1 /* reclaim */ + \
 394                                 encode_stateid_maxsz + \
 395                                 1 /* new offset (true) */ + \
 396                                 2 /* last byte written */ + \
 397                                 1 /* nt_timechanged (false) */ + \
 398                                 1 /* layoutupdate4 layout type */ + \
 399                                 1 /* NULL filelayout layoutupdate4 payload */)
 400 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 401 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 402                                 encode_stateid_maxsz + \
 403                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 404 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 405                                 1 + decode_stateid_maxsz)
 406 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 407 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 408 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 409                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 410 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 411 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 412                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 413 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 414 #else /* CONFIG_NFS_V4_1 */
 415 #define encode_sequence_maxsz   0
 416 #define decode_sequence_maxsz   0
 417 #endif /* CONFIG_NFS_V4_1 */
 418
 419 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 420 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 421 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 422                                 encode_sequence_maxsz + \
 423                                 encode_putfh_maxsz + \
 424                                 encode_read_maxsz)
 425 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 426                                 decode_sequence_maxsz + \
 427                                 decode_putfh_maxsz + \
 428                                 decode_read_maxsz)
 429 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 430                                 encode_sequence_maxsz + \
 431                                 encode_putfh_maxsz + \
 432                                 encode_readlink_maxsz)
 433 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 434                                 decode_sequence_maxsz + \
 435                                 decode_putfh_maxsz + \
 436                                 decode_readlink_maxsz)
 437 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 438                                 encode_sequence_maxsz + \
 439                                 encode_putfh_maxsz + \
 440                                 encode_readdir_maxsz)
 441 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 442                                 decode_sequence_maxsz + \
 443                                 decode_putfh_maxsz + \
 444                                 decode_readdir_maxsz)
 445 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 446                                 encode_sequence_maxsz + \
 447                                 encode_putfh_maxsz + \
 448                                 encode_write_maxsz + \
 449                                 encode_getattr_maxsz)
 450 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 451                                 decode_sequence_maxsz + \
 452                                 decode_putfh_maxsz + \
 453                                 decode_write_maxsz + \
 454                                 decode_getattr_maxsz)
 455 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 456                                 encode_sequence_maxsz + \
 457                                 encode_putfh_maxsz + \
 458                                 encode_commit_maxsz)
 459 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 460                                 decode_sequence_maxsz + \
 461                                 decode_putfh_maxsz + \
 462                                 decode_commit_maxsz)
 463 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 464                                 encode_sequence_maxsz + \
 465                                 encode_putfh_maxsz + \
 466                                 encode_open_maxsz + \
 467                                 encode_access_maxsz + \
 468                                 encode_getfh_maxsz + \
 469                                 encode_getattr_maxsz)
 470 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 471                                 decode_sequence_maxsz + \
 472                                 decode_putfh_maxsz + \
 473                                 decode_open_maxsz + \
 474                                 decode_access_maxsz + \
 475                                 decode_getfh_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_open_confirm_sz \
 478                                 (compound_encode_hdr_maxsz + \
 479                                  encode_putfh_maxsz + \
 480                                  encode_open_confirm_maxsz)
 481 #define NFS4_dec_open_confirm_sz \
 482                                 (compound_decode_hdr_maxsz + \
 483                                  decode_putfh_maxsz + \
 484                                  decode_open_confirm_maxsz)
 485 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 486                                         encode_sequence_maxsz + \
 487                                         encode_putfh_maxsz + \
 488                                         encode_open_maxsz + \
 489                                         encode_access_maxsz + \
 490                                         encode_getattr_maxsz)
 491 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 492                                         decode_sequence_maxsz + \
 493                                         decode_putfh_maxsz + \
 494                                         decode_open_maxsz + \
 495                                         decode_access_maxsz + \
 496                                         decode_getattr_maxsz)
 497 #define NFS4_enc_open_downgrade_sz \
 498                                 (compound_encode_hdr_maxsz + \
 499                                  encode_sequence_maxsz + \
 500                                  encode_putfh_maxsz + \
 501                                  encode_open_downgrade_maxsz + \
 502                                  encode_getattr_maxsz)
 503 #define NFS4_dec_open_downgrade_sz \
 504                                 (compound_decode_hdr_maxsz + \
 505                                  decode_sequence_maxsz + \
 506                                  decode_putfh_maxsz + \
 507                                  decode_open_downgrade_maxsz + \
 508                                  decode_getattr_maxsz)
 509 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 510                                  encode_sequence_maxsz + \
 511                                  encode_putfh_maxsz + \
 512                                  encode_close_maxsz + \
 513                                  encode_getattr_maxsz)
 514 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 515                                  decode_sequence_maxsz + \
 516                                  decode_putfh_maxsz + \
 517                                  decode_close_maxsz + \
 518                                  decode_getattr_maxsz)
 519 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 520                                  encode_sequence_maxsz + \
 521                                  encode_putfh_maxsz + \
 522                                  encode_setattr_maxsz + \
 523                                  encode_getattr_maxsz)
 524 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 525                                  decode_sequence_maxsz + \
 526                                  decode_putfh_maxsz + \
 527                                  decode_setattr_maxsz + \
 528                                  decode_getattr_maxsz)
 529 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 530                                 encode_sequence_maxsz + \
 531                                 encode_putfh_maxsz + \
 532                                 encode_fsinfo_maxsz)
 533 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 534                                 decode_sequence_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_fsinfo_maxsz)
 537 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 538                                 encode_renew_maxsz)
 539 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 540                                 decode_renew_maxsz)
 541 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 542                                 encode_setclientid_maxsz)
 543 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 544                                 decode_setclientid_maxsz)
 545 #define NFS4_enc_setclientid_confirm_sz \
 546                                 (compound_encode_hdr_maxsz + \
 547                                 encode_setclientid_confirm_maxsz)
 548 #define NFS4_dec_setclientid_confirm_sz \
 549                                 (compound_decode_hdr_maxsz + \
 550                                 decode_setclientid_confirm_maxsz)
 551 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 552                                 encode_sequence_maxsz + \
 553                                 encode_putfh_maxsz + \
 554                                 encode_lock_maxsz)
 555 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 556                                 decode_sequence_maxsz + \
 557                                 decode_putfh_maxsz + \
 558                                 decode_lock_maxsz)
 559 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 560                                 encode_sequence_maxsz + \
 561                                 encode_putfh_maxsz + \
 562                                 encode_lockt_maxsz)
 563 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 564                                  decode_sequence_maxsz + \
 565                                  decode_putfh_maxsz + \
 566                                  decode_lockt_maxsz)
 567 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_locku_maxsz)
 571 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 572                                 decode_sequence_maxsz + \
 573                                 decode_putfh_maxsz + \
 574                                 decode_locku_maxsz)
 575 #define NFS4_enc_release_lockowner_sz \
 576                                 (compound_encode_hdr_maxsz + \
 577                                  encode_lockowner_maxsz)
 578 #define NFS4_dec_release_lockowner_sz \
 579                                 (compound_decode_hdr_maxsz + \
 580                                  decode_lockowner_maxsz)
 581 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 582                                 encode_sequence_maxsz + \
 583                                 encode_putfh_maxsz + \
 584                                 encode_access_maxsz + \
 585                                 encode_getattr_maxsz)
 586 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 587                                 decode_sequence_maxsz + \
 588                                 decode_putfh_maxsz + \
 589                                 decode_access_maxsz + \
 590                                 decode_getattr_maxsz)
 591 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 592                                 encode_sequence_maxsz + \
 593                                 encode_putfh_maxsz + \
 594                                 encode_getattr_maxsz)
 595 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_getattr_maxsz)
 599 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 600                                 encode_sequence_maxsz + \
 601                                 encode_putfh_maxsz + \
 602                                 encode_lookup_maxsz + \
 603                                 encode_getattr_maxsz + \
 604                                 encode_getfh_maxsz)
 605 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 606                                 decode_sequence_maxsz + \
 607                                 decode_putfh_maxsz + \
 608                                 decode_lookup_maxsz + \
 609                                 decode_getattr_maxsz + \
 610                                 decode_getfh_maxsz)
 611 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 612                                 encode_sequence_maxsz + \
 613                                 encode_putrootfh_maxsz + \
 614                                 encode_getattr_maxsz + \
 615                                 encode_getfh_maxsz)
 616 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 617                                 decode_sequence_maxsz + \
 618                                 decode_putrootfh_maxsz + \
 619                                 decode_getattr_maxsz + \
 620                                 decode_getfh_maxsz)
 621 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_remove_maxsz)
 625 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_remove_maxsz)
 629 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_savefh_maxsz + \
 633                                 encode_putfh_maxsz + \
 634                                 encode_rename_maxsz)
 635 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 636                                 decode_sequence_maxsz + \
 637                                 decode_putfh_maxsz + \
 638                                 decode_savefh_maxsz + \
 639                                 decode_putfh_maxsz + \
 640                                 decode_rename_maxsz)
 641 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 642                                 encode_sequence_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_savefh_maxsz + \
 645                                 encode_putfh_maxsz + \
 646                                 encode_link_maxsz + \
 647                                 encode_restorefh_maxsz + \
 648                                 encode_getattr_maxsz)
 649 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 650                                 decode_sequence_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_savefh_maxsz + \
 653                                 decode_putfh_maxsz + \
 654                                 decode_link_maxsz + \
 655                                 decode_restorefh_maxsz + \
 656                                 decode_getattr_maxsz)
 657 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 658                                 encode_sequence_maxsz + \
 659                                 encode_putfh_maxsz + \
 660                                 encode_symlink_maxsz + \
 661                                 encode_getattr_maxsz + \
 662                                 encode_getfh_maxsz)
 663 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 664                                 decode_sequence_maxsz + \
 665                                 decode_putfh_maxsz + \
 666                                 decode_symlink_maxsz + \
 667                                 decode_getattr_maxsz + \
 668                                 decode_getfh_maxsz)
 669 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 670                                 encode_sequence_maxsz + \
 671                                 encode_putfh_maxsz + \
 672                                 encode_create_maxsz + \
 673                                 encode_getfh_maxsz + \
 674                                 encode_getattr_maxsz)
 675 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_create_maxsz + \
 679                                 decode_getfh_maxsz + \
 680                                 decode_getattr_maxsz)
 681 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 682                                 encode_sequence_maxsz + \
 683                                 encode_putfh_maxsz + \
 684                                 encode_getattr_maxsz)
 685 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 686                                 decode_sequence_maxsz + \
 687                                 decode_putfh_maxsz + \
 688                                 decode_getattr_maxsz)
 689 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 690                                 encode_sequence_maxsz + \
 691                                 encode_putfh_maxsz + \
 692                                 encode_statfs_maxsz)
 693 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 694                                 decode_sequence_maxsz + \
 695                                 decode_putfh_maxsz + \
 696                                 decode_statfs_maxsz)
 697 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_getattr_maxsz)
 701 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_getattr_maxsz)
 705 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 706                                 encode_sequence_maxsz + \
 707                                 encode_putfh_maxsz + \
 708                                 encode_delegreturn_maxsz + \
 709                                 encode_getattr_maxsz)
 710 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 711                                 decode_sequence_maxsz + \
 712                                 decode_delegreturn_maxsz + \
 713                                 decode_getattr_maxsz)
 714 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 715                                 encode_sequence_maxsz + \
 716                                 encode_putfh_maxsz + \
 717                                 encode_getacl_maxsz)
 718 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 719                                 decode_sequence_maxsz + \
 720                                 decode_putfh_maxsz + \
 721                                 decode_getacl_maxsz)
 722 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 723                                 encode_sequence_maxsz + \
 724                                 encode_putfh_maxsz + \
 725                                 encode_setacl_maxsz)
 726 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 727                                 decode_sequence_maxsz + \
 728                                 decode_putfh_maxsz + \
 729                                 decode_setacl_maxsz)
 730 #define NFS4_enc_fs_locations_sz \
 731                                 (compound_encode_hdr_maxsz + \
 732                                  encode_sequence_maxsz + \
 733                                  encode_putfh_maxsz + \
 734                                  encode_lookup_maxsz + \
 735                                  encode_fs_locations_maxsz)
 736 #define NFS4_dec_fs_locations_sz \
 737                                 (compound_decode_hdr_maxsz + \
 738                                  decode_sequence_maxsz + \
 739                                  decode_putfh_maxsz + \
 740                                  decode_lookup_maxsz + \
 741                                  decode_fs_locations_maxsz)
 742 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 743                                 encode_sequence_maxsz + \
 744                                 encode_putfh_maxsz + \
 745                                 encode_secinfo_maxsz)
 746 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 747                                 decode_sequence_maxsz + \
 748                                 decode_putfh_maxsz + \
 749                                 decode_secinfo_maxsz)
 750 #if defined(CONFIG_NFS_V4_1)
 751 #define NFS4_enc_bind_conn_to_session_sz \
 752                                 (compound_encode_hdr_maxsz + \
 753                                  encode_bind_conn_to_session_maxsz)
 754 #define NFS4_dec_bind_conn_to_session_sz \
 755                                 (compound_decode_hdr_maxsz + \
 756                                  decode_bind_conn_to_session_maxsz)
 757 #define NFS4_enc_exchange_id_sz \
 758                                 (compound_encode_hdr_maxsz + \
 759                                  encode_exchange_id_maxsz)
 760 #define NFS4_dec_exchange_id_sz \
 761                                 (compound_decode_hdr_maxsz + \
 762                                  decode_exchange_id_maxsz)
 763 #define NFS4_enc_create_session_sz \
 764                                 (compound_encode_hdr_maxsz + \
 765                                  encode_create_session_maxsz)
 766 #define NFS4_dec_create_session_sz \
 767                                 (compound_decode_hdr_maxsz + \
 768                                  decode_create_session_maxsz)
 769 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 770                                          encode_destroy_session_maxsz)
 771 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 772                                          decode_destroy_session_maxsz)
 773 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 774                                          encode_destroy_clientid_maxsz)
 775 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 776                                          decode_destroy_clientid_maxsz)
 777 #define NFS4_enc_sequence_sz \
 778                                 (compound_decode_hdr_maxsz + \
 779                                  encode_sequence_maxsz)
 780 #define NFS4_dec_sequence_sz \
 781                                 (compound_decode_hdr_maxsz + \
 782                                  decode_sequence_maxsz)
 783 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 784                                          encode_sequence_maxsz + \
 785                                          encode_putrootfh_maxsz + \
 786                                          encode_fsinfo_maxsz)
 787 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 788                                          decode_sequence_maxsz + \
 789                                          decode_putrootfh_maxsz + \
 790                                          decode_fsinfo_maxsz)
 791 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 792                                          encode_sequence_maxsz + \
 793                                          encode_reclaim_complete_maxsz)
 794 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 795                                          decode_sequence_maxsz + \
 796                                          decode_reclaim_complete_maxsz)
 797 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 798                                 encode_sequence_maxsz + \
 799                                 encode_putfh_maxsz + \
 800                                 encode_getdevicelist_maxsz)
 801 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 802                                 decode_sequence_maxsz + \
 803                                 decode_putfh_maxsz + \
 804                                 decode_getdevicelist_maxsz)
 805 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 806                                 encode_sequence_maxsz +\
 807                                 encode_getdeviceinfo_maxsz)
 808 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 809                                 decode_sequence_maxsz + \
 810                                 decode_getdeviceinfo_maxsz)
 811 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 812                                 encode_sequence_maxsz + \
 813                                 encode_putfh_maxsz +        \
 814                                 encode_layoutget_maxsz)
 815 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 816                                 decode_sequence_maxsz + \
 817                                 decode_putfh_maxsz +        \
 818                                 decode_layoutget_maxsz)
 819 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 820                                 encode_sequence_maxsz +\
 821                                 encode_putfh_maxsz + \
 822                                 encode_layoutcommit_maxsz + \
 823                                 encode_getattr_maxsz)
 824 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 825                                 decode_sequence_maxsz + \
 826                                 decode_putfh_maxsz + \
 827                                 decode_layoutcommit_maxsz + \
 828                                 decode_getattr_maxsz)
 829 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 830                                 encode_sequence_maxsz + \
 831                                 encode_putfh_maxsz + \
 832                                 encode_layoutreturn_maxsz)
 833 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 834                                 decode_sequence_maxsz + \
 835                                 decode_putfh_maxsz + \
 836                                 decode_layoutreturn_maxsz)
 837 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 838                                         encode_sequence_maxsz + \
 839                                         encode_putrootfh_maxsz +\
 840                                         encode_secinfo_no_name_maxsz)
 841 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 842                                         decode_sequence_maxsz + \
 843                                         decode_putrootfh_maxsz + \
 844                                         decode_secinfo_no_name_maxsz)
 845 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 846                                          encode_sequence_maxsz + \
 847                                          encode_test_stateid_maxsz)
 848 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 849                                          decode_sequence_maxsz + \
 850                                          decode_test_stateid_maxsz)
 851 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 852                                          encode_sequence_maxsz + \
 853                                          encode_free_stateid_maxsz)
 854 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 855                                          decode_sequence_maxsz + \
 856                                          decode_free_stateid_maxsz)
 857
 858 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 859                                       compound_encode_hdr_maxsz +
 860                                       encode_sequence_maxsz +
 861                                       encode_putfh_maxsz +
 862                                       encode_getattr_maxsz) *
 863                                      XDR_UNIT);
 864
 865 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 866                                      compound_decode_hdr_maxsz +
 867                                      decode_sequence_maxsz +
 868                                      decode_putfh_maxsz) *
 869                                     XDR_UNIT);
 870
 871 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 872                                            compound_decode_hdr_maxsz +
 873                                            decode_sequence_maxsz) *
 874                                           XDR_UNIT);
 875 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 876 #endif /* CONFIG_NFS_V4_1 */
 877
 878 static const umode_t nfs_type2fmt[] = {
 879         [NF4BAD] = 0,
 880         [NF4REG] = S_IFREG,
 881         [NF4DIR] = S_IFDIR,
 882         [NF4BLK] = S_IFBLK,
 883         [NF4CHR] = S_IFCHR,
 884         [NF4LNK] = S_IFLNK,
 885         [NF4SOCK] = S_IFSOCK,
 886         [NF4FIFO] = S_IFIFO,
 887         [NF4ATTRDIR] = 0,
 888         [NF4NAMEDATTR] = 0,
 889 };
 890
 891 struct compound_hdr {
 892         int32_t         status;
 893         uint32_t        nops;
 894         __be32 *        nops_p;
 895         uint32_t        taglen;
 896         char *          tag;
 897         uint32_t        replen;         /* expected reply words */
 898         u32             minorversion;
 899 };
 900
 901 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 902 {
 903         __be32 *p = xdr_reserve_space(xdr, nbytes);
 904         BUG_ON(!p);
 905         return p;
 906 }
 907
 908 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 909 {
 910         __be32 *p;
 911
 912         p = xdr_reserve_space(xdr, len);
 913         xdr_encode_opaque_fixed(p, buf, len);
 914 }
 915
 916 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 917 {
 918         __be32 *p;
 919
 920         p = reserve_space(xdr, 4 + len);
 921         xdr_encode_opaque(p, str, len);
 922 }
 923
 924 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 925 {
 926         __be32 *p;
 927
 928         p = reserve_space(xdr, 4);
 929         *p = cpu_to_be32(n);
 930 }
 931
 932 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 933 {
 934         __be32 *p;
 935
 936         p = reserve_space(xdr, 8);
 937         xdr_encode_hyper(p, n);
 938 }
 939
 940 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 941                 const struct nfs_seqid *seqid)
 942 {
 943         encode_uint32(xdr, seqid->sequence->counter);
 944 }
 945
 946 static void encode_compound_hdr(struct xdr_stream *xdr,
 947                                 struct rpc_rqst *req,
 948                                 struct compound_hdr *hdr)
 949 {
 950         __be32 *p;
 951         struct rpc_auth *auth = req->rq_cred->cr_auth;
 952
 953         /* initialize running count of expected bytes in reply.
 954          * NOTE: the replied tag SHOULD be the same is the one sent,
 955          * but this is not required as a MUST for the server to do so. */
 956         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 957
 958         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 959         encode_string(xdr, hdr->taglen, hdr->tag);
 960         p = reserve_space(xdr, 8);
 961         *p++ = cpu_to_be32(hdr->minorversion);
 962         hdr->nops_p = p;
 963         *p = cpu_to_be32(hdr->nops);
 964 }
 965
 966 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 967                 uint32_t replen,
 968                 struct compound_hdr *hdr)
 969 {
 970         encode_uint32(xdr, op);
 971         hdr->nops++;
 972         hdr->replen += replen;
 973 }
 974
 975 static void encode_nops(struct compound_hdr *hdr)
 976 {
 977         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 978         *hdr->nops_p = htonl(hdr->nops);
 979 }
 980
 981 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 982 {
 983         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 984 }
 985
 986 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 987 {
 988         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 989 }
 990
 991 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
 992                                 const struct nfs4_label *label,
 993                                 const struct nfs_server *server)
 994 {
 995         char owner_name[IDMAP_NAMESZ];
 996         char owner_group[IDMAP_NAMESZ];
 997         int owner_namelen = 0;
 998         int owner_grouplen = 0;
 999         __be32 *p;
1000         __be32 *q;
1001         int len;
1002         uint32_t bmval0 = 0;
1003         uint32_t bmval1 = 0;
1004         uint32_t bmval2 = 0;
1005
1006         /*
1007          * We reserve enough space to write the entire attribute buffer at once.
1008          * In the worst-case, this would be
1009          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1010          * = 40 bytes, plus any contribution from variable-length fields
1011          *            such as owner/group.
1012          */
1013         len = 20;
1014
1015         /* Sigh */
1016         if (iap->ia_valid & ATTR_SIZE)
1017                 len += 8;
1018         if (iap->ia_valid & ATTR_MODE)
1019                 len += 4;
1020         if (iap->ia_valid & ATTR_UID) {
1021                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1022                 if (owner_namelen < 0) {
1023                         dprintk("nfs: couldn't resolve uid %d to string\n",
1024                                         from_kuid(&init_user_ns, iap->ia_uid));
1025                         /* XXX */
1026                         strcpy(owner_name, "nobody");
1027                         owner_namelen = sizeof("nobody") - 1;
1028                         /* goto out; */
1029                 }
1030                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1031         }
1032         if (iap->ia_valid & ATTR_GID) {
1033                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1034                 if (owner_grouplen < 0) {
1035                         dprintk("nfs: couldn't resolve gid %d to string\n",
1036                                         from_kgid(&init_user_ns, iap->ia_gid));
1037                         strcpy(owner_group, "nobody");
1038                         owner_grouplen = sizeof("nobody") - 1;
1039                         /* goto out; */
1040                 }
1041                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1042         }
1043         if (label)
1044                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1045         if (iap->ia_valid & ATTR_ATIME_SET)
1046                 len += 16;
1047         else if (iap->ia_valid & ATTR_ATIME)
1048                 len += 4;
1049         if (iap->ia_valid & ATTR_MTIME_SET)
1050                 len += 16;
1051         else if (iap->ia_valid & ATTR_MTIME)
1052                 len += 4;
1053         p = reserve_space(xdr, len);
1054
1055         /*
1056          * We write the bitmap length now, but leave the bitmap and the attribute
1057          * buffer length to be backfilled at the end of this routine.
1058          */
1059         *p++ = cpu_to_be32(3);
1060         q = p;
1061         p += 4;
1062
1063         if (iap->ia_valid & ATTR_SIZE) {
1064                 bmval0 |= FATTR4_WORD0_SIZE;
1065                 p = xdr_encode_hyper(p, iap->ia_size);
1066         }
1067         if (iap->ia_valid & ATTR_MODE) {
1068                 bmval1 |= FATTR4_WORD1_MODE;
1069                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1070         }
1071         if (iap->ia_valid & ATTR_UID) {
1072                 bmval1 |= FATTR4_WORD1_OWNER;
1073                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1074         }
1075         if (iap->ia_valid & ATTR_GID) {
1076                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1077                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1078         }
1079         if (iap->ia_valid & ATTR_ATIME_SET) {
1080                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1081                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1082                 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1083                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1084         }
1085         else if (iap->ia_valid & ATTR_ATIME) {
1086                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1087                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1088         }
1089         if (iap->ia_valid & ATTR_MTIME_SET) {
1090                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1091                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1092                 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1093                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1094         }
1095         else if (iap->ia_valid & ATTR_MTIME) {
1096                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1097                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1098         }
1099         if (label) {
1100                 bmval2 |= FATTR4_WORD2_SECURITY_LABEL;
1101                 *p++ = cpu_to_be32(label->lfs);
1102                 *p++ = cpu_to_be32(label->pi);
1103                 *p++ = cpu_to_be32(label->len);
1104                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1105         }
1106
1107         /*
1108          * Now we backfill the bitmap and the attribute buffer length.
1109          */
1110         if (len != ((char *)p - (char *)q) + 4) {
1111                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1112                                 len, ((char *)p - (char *)q) + 4);
1113                 BUG();
1114         }
1115         len = (char *)p - (char *)q - 16;
1116         *q++ = htonl(bmval0);
1117         *q++ = htonl(bmval1);
1118         *q++ = htonl(bmval2);
1119         *q = htonl(len);
1120
1121 /* out: */
1122 }
1123
1124 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1125 {
1126         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1127         encode_uint32(xdr, access);
1128 }
1129
1130 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1131 {
1132         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1133         encode_nfs4_seqid(xdr, arg->seqid);
1134         encode_nfs4_stateid(xdr, arg->stateid);
1135 }
1136
1137 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1138 {
1139         __be32 *p;
1140
1141         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1142         p = reserve_space(xdr, 12);
1143         p = xdr_encode_hyper(p, args->offset);
1144         *p = cpu_to_be32(args->count);
1145 }
1146
1147 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1148 {
1149         __be32 *p;
1150
1151         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1152         encode_uint32(xdr, create->ftype);
1153
1154         switch (create->ftype) {
1155         case NF4LNK:
1156                 p = reserve_space(xdr, 4);
1157                 *p = cpu_to_be32(create->u.symlink.len);
1158                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1159                 break;
1160
1161         case NF4BLK: case NF4CHR:
1162                 p = reserve_space(xdr, 8);
1163                 *p++ = cpu_to_be32(create->u.device.specdata1);
1164                 *p = cpu_to_be32(create->u.device.specdata2);
1165                 break;
1166
1167         default:
1168                 break;
1169         }
1170
1171         encode_string(xdr, create->name->len, create->name->name);
1172         encode_attrs(xdr, create->attrs, create->label, create->server);
1173 }
1174
1175 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1176 {
1177         __be32 *p;
1178
1179         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1180         p = reserve_space(xdr, 8);
1181         *p++ = cpu_to_be32(1);
1182         *p = cpu_to_be32(bitmap);
1183 }
1184
1185 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1186 {
1187         __be32 *p;
1188
1189         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1190         p = reserve_space(xdr, 12);
1191         *p++ = cpu_to_be32(2);
1192         *p++ = cpu_to_be32(bm0);
1193         *p = cpu_to_be32(bm1);
1194 }
1195
1196 static void
1197 encode_getattr_three(struct xdr_stream *xdr,
1198                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1199                      struct compound_hdr *hdr)
1200 {
1201         __be32 *p;
1202
1203         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1204         if (bm2) {
1205                 p = reserve_space(xdr, 16);
1206                 *p++ = cpu_to_be32(3);
1207                 *p++ = cpu_to_be32(bm0);
1208                 *p++ = cpu_to_be32(bm1);
1209                 *p = cpu_to_be32(bm2);
1210         } else if (bm1) {
1211                 p = reserve_space(xdr, 12);
1212                 *p++ = cpu_to_be32(2);
1213                 *p++ = cpu_to_be32(bm0);
1214                 *p = cpu_to_be32(bm1);
1215         } else {
1216                 p = reserve_space(xdr, 8);
1217                 *p++ = cpu_to_be32(1);
1218                 *p = cpu_to_be32(bm0);
1219         }
1220 }
1221
1222 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1223 {
1224         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1225                            bitmask[1] & nfs4_fattr_bitmap[1],
1226                            bitmask[2] & nfs4_fattr_bitmap[2],
1227                            hdr);
1228 }
1229
1230 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1231                                  const u32 *open_bitmap,
1232                                  struct compound_hdr *hdr)
1233 {
1234         encode_getattr_three(xdr,
1235                              bitmask[0] & open_bitmap[0],
1236                              bitmask[1] & open_bitmap[1],
1237                              bitmask[2] & open_bitmap[2],
1238                              hdr);
1239 }
1240
1241 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1242 {
1243         encode_getattr_three(xdr,
1244                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1245                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1246                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1247                              hdr);
1248 }
1249
1250 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1251 {
1252         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1253                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1254 }
1255
1256 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1257 {
1258         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1259 }
1260
1261 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1262 {
1263         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1264         encode_string(xdr, name->len, name->name);
1265 }
1266
1267 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1268 {
1269         if (fl->fl_type == F_RDLCK)
1270                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1271         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1272 }
1273
1274 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1275 {
1276         if (fl->fl_end == OFFSET_MAX)
1277                 return ~(uint64_t)0;
1278         return fl->fl_end - fl->fl_start + 1;
1279 }
1280
1281 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1282 {
1283         __be32 *p;
1284
1285         p = reserve_space(xdr, 32);
1286         p = xdr_encode_hyper(p, lowner->clientid);
1287         *p++ = cpu_to_be32(20);
1288         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1289         *p++ = cpu_to_be32(lowner->s_dev);
1290         xdr_encode_hyper(p, lowner->id);
1291 }
1292
1293 /*
1294  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1295  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1296  */
1297 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1298 {
1299         __be32 *p;
1300
1301         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1302         p = reserve_space(xdr, 28);
1303         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1304         *p++ = cpu_to_be32(args->reclaim);
1305         p = xdr_encode_hyper(p, args->fl->fl_start);
1306         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1307         *p = cpu_to_be32(args->new_lock_owner);
1308         if (args->new_lock_owner){
1309                 encode_nfs4_seqid(xdr, args->open_seqid);
1310                 encode_nfs4_stateid(xdr, args->open_stateid);
1311                 encode_nfs4_seqid(xdr, args->lock_seqid);
1312                 encode_lockowner(xdr, &args->lock_owner);
1313         }
1314         else {
1315                 encode_nfs4_stateid(xdr, args->lock_stateid);
1316                 encode_nfs4_seqid(xdr, args->lock_seqid);
1317         }
1318 }
1319
1320 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1321 {
1322         __be32 *p;
1323
1324         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1325         p = reserve_space(xdr, 20);
1326         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1327         p = xdr_encode_hyper(p, args->fl->fl_start);
1328         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1329         encode_lockowner(xdr, &args->lock_owner);
1330 }
1331
1332 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1333 {
1334         __be32 *p;
1335
1336         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1337         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1338         encode_nfs4_seqid(xdr, args->seqid);
1339         encode_nfs4_stateid(xdr, args->stateid);
1340         p = reserve_space(xdr, 16);
1341         p = xdr_encode_hyper(p, args->fl->fl_start);
1342         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1343 }
1344
1345 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1346 {
1347         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1348         encode_lockowner(xdr, lowner);
1349 }
1350
1351 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1352 {
1353         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1354         encode_string(xdr, name->len, name->name);
1355 }
1356
1357 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1358 {
1359         __be32 *p;
1360
1361         p = reserve_space(xdr, 8);
1362         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1363         case FMODE_READ:
1364                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1365                 break;
1366         case FMODE_WRITE:
1367                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1368                 break;
1369         case FMODE_READ|FMODE_WRITE:
1370                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1371                 break;
1372         default:
1373                 *p++ = cpu_to_be32(0);
1374         }
1375         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1376 }
1377
1378 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1379 {
1380         __be32 *p;
1381  /*
1382  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1383  * owner 4 = 32
1384  */
1385         encode_nfs4_seqid(xdr, arg->seqid);
1386         encode_share_access(xdr, arg->fmode);
1387         p = reserve_space(xdr, 36);
1388         p = xdr_encode_hyper(p, arg->clientid);
1389         *p++ = cpu_to_be32(24);
1390         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1391         *p++ = cpu_to_be32(arg->server->s_dev);
1392         *p++ = cpu_to_be32(arg->id.uniquifier);
1393         xdr_encode_hyper(p, arg->id.create_time);
1394 }
1395
1396 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397 {
1398         struct iattr dummy;
1399         __be32 *p;
1400
1401         p = reserve_space(xdr, 4);
1402         switch(arg->createmode) {
1403         case NFS4_CREATE_UNCHECKED:
1404                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1405                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1406                 break;
1407         case NFS4_CREATE_GUARDED:
1408                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1409                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1410                 break;
1411         case NFS4_CREATE_EXCLUSIVE:
1412                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1413                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1414                 break;
1415         case NFS4_CREATE_EXCLUSIVE4_1:
1416                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1417                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1418                 dummy.ia_valid = 0;
1419                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1420         }
1421 }
1422
1423 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1424 {
1425         __be32 *p;
1426
1427         p = reserve_space(xdr, 4);
1428         switch (arg->open_flags & O_CREAT) {
1429         case 0:
1430                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1431                 break;
1432         default:
1433                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1434                 encode_createmode(xdr, arg);
1435         }
1436 }
1437
1438 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1439 {
1440         __be32 *p;
1441
1442         p = reserve_space(xdr, 4);
1443         switch (delegation_type) {
1444         case 0:
1445                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1446                 break;
1447         case FMODE_READ:
1448                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1449                 break;
1450         case FMODE_WRITE|FMODE_READ:
1451                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1452                 break;
1453         default:
1454                 BUG();
1455         }
1456 }
1457
1458 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1459 {
1460         __be32 *p;
1461
1462         p = reserve_space(xdr, 4);
1463         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1464         encode_string(xdr, name->len, name->name);
1465 }
1466
1467 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1468 {
1469         __be32 *p;
1470
1471         p = reserve_space(xdr, 4);
1472         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1473         encode_delegation_type(xdr, type);
1474 }
1475
1476 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1477 {
1478         __be32 *p;
1479
1480         p = reserve_space(xdr, 4);
1481         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1482         encode_nfs4_stateid(xdr, stateid);
1483         encode_string(xdr, name->len, name->name);
1484 }
1485
1486 static inline void encode_claim_fh(struct xdr_stream *xdr)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4);
1491         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1492 }
1493
1494 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1495 {
1496         __be32 *p;
1497
1498         p = reserve_space(xdr, 4);
1499         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1500         encode_nfs4_stateid(xdr, stateid);
1501 }
1502
1503 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1504 {
1505         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1506         encode_openhdr(xdr, arg);
1507         encode_opentype(xdr, arg);
1508         switch (arg->claim) {
1509         case NFS4_OPEN_CLAIM_NULL:
1510                 encode_claim_null(xdr, arg->name);
1511                 break;
1512         case NFS4_OPEN_CLAIM_PREVIOUS:
1513                 encode_claim_previous(xdr, arg->u.delegation_type);
1514                 break;
1515         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1516                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1517                 break;
1518         case NFS4_OPEN_CLAIM_FH:
1519                 encode_claim_fh(xdr);
1520                 break;
1521         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1522                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1523                 break;
1524         default:
1525                 BUG();
1526         }
1527 }
1528
1529 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1530 {
1531         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1532         encode_nfs4_stateid(xdr, arg->stateid);
1533         encode_nfs4_seqid(xdr, arg->seqid);
1534 }
1535
1536 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1537 {
1538         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1539         encode_nfs4_stateid(xdr, arg->stateid);
1540         encode_nfs4_seqid(xdr, arg->seqid);
1541         encode_share_access(xdr, arg->fmode);
1542 }
1543
1544 static void
1545 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1546 {
1547         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1548         encode_string(xdr, fh->size, fh->data);
1549 }
1550
1551 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1552 {
1553         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1554 }
1555
1556 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1557 {
1558         __be32 *p;
1559
1560         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1561         encode_nfs4_stateid(xdr, &args->stateid);
1562
1563         p = reserve_space(xdr, 12);
1564         p = xdr_encode_hyper(p, args->offset);
1565         *p = cpu_to_be32(args->count);
1566 }
1567
1568 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1569 {
1570         uint32_t attrs[3] = {
1571                 FATTR4_WORD0_RDATTR_ERROR,
1572                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1573         };
1574         uint32_t dircount = readdir->count >> 1;
1575         __be32 *p, verf[2];
1576
1577         if (readdir->plus) {
1578                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1579                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1580                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1581                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1582                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1583                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1584                 dircount >>= 1;
1585         }
1586         /* Use mounted_on_fileid only if the server supports it */
1587         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1588                 attrs[0] |= FATTR4_WORD0_FILEID;
1589
1590         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1591         encode_uint64(xdr, readdir->cookie);
1592         encode_nfs4_verifier(xdr, &readdir->verifier);
1593         p = reserve_space(xdr, encode_readdir_space);
1594         *p++ = cpu_to_be32(dircount);
1595         *p++ = cpu_to_be32(readdir->count);
1596         *p++ = cpu_to_be32(encode_readdir_bitmask_sz);
1597         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1598         *p   = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1599         if (encode_readdir_bitmask_sz > 2) {
1600                 if (hdr->minorversion > 1)
1601                         attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1602                 p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]);
1603         }
1604         memcpy(verf, readdir->verifier.data, sizeof(verf));
1605
1606         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1607                         __func__,
1608                         (unsigned long long)readdir->cookie,
1609                         verf[0], verf[1],
1610                         attrs[0] & readdir->bitmask[0],
1611                         attrs[1] & readdir->bitmask[1],
1612                         attrs[2] & readdir->bitmask[2]);
1613 }
1614
1615 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1616 {
1617         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1618 }
1619
1620 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1621 {
1622         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1623         encode_string(xdr, name->len, name->name);
1624 }
1625
1626 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1627 {
1628         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1629         encode_string(xdr, oldname->len, oldname->name);
1630         encode_string(xdr, newname->len, newname->name);
1631 }
1632
1633 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1634                          struct compound_hdr *hdr)
1635 {
1636         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1637         encode_uint64(xdr, clid);
1638 }
1639
1640 static void
1641 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1642 {
1643         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1644 }
1645
1646 static void
1647 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1648 {
1649         __be32 *p;
1650
1651         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1652         encode_nfs4_stateid(xdr, &zero_stateid);
1653         p = reserve_space(xdr, 2*4);
1654         *p++ = cpu_to_be32(1);
1655         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1656         p = reserve_space(xdr, 4);
1657         *p = cpu_to_be32(arg->acl_len);
1658         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1659 }
1660
1661 static void
1662 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1663 {
1664         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1665 }
1666
1667 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1668 {
1669         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1670         encode_nfs4_stateid(xdr, &arg->stateid);
1671         encode_attrs(xdr, arg->iap, arg->label, server);
1672 }
1673
1674 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1675 {
1676         __be32 *p;
1677
1678         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1679         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1680
1681         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1682         p = reserve_space(xdr, 4);
1683         *p = cpu_to_be32(setclientid->sc_prog);
1684         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1685         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1686         p = reserve_space(xdr, 4);
1687         *p = cpu_to_be32(setclientid->sc_cb_ident);
1688 }
1689
1690 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1691 {
1692         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1693                         decode_setclientid_confirm_maxsz, hdr);
1694         encode_uint64(xdr, arg->clientid);
1695         encode_nfs4_verifier(xdr, &arg->confirm);
1696 }
1697
1698 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1699 {
1700         __be32 *p;
1701
1702         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1703         encode_nfs4_stateid(xdr, &args->stateid);
1704
1705         p = reserve_space(xdr, 16);
1706         p = xdr_encode_hyper(p, args->offset);
1707         *p++ = cpu_to_be32(args->stable);
1708         *p = cpu_to_be32(args->count);
1709
1710         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1711 }
1712
1713 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1714 {
1715         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1716         encode_nfs4_stateid(xdr, stateid);
1717 }
1718
1719 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1720 {
1721         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1722         encode_string(xdr, name->len, name->name);
1723 }
1724
1725 #if defined(CONFIG_NFS_V4_1)
1726 /* NFSv4.1 operations */
1727 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1728                                    struct nfs4_session *session,
1729                                    struct compound_hdr *hdr)
1730 {
1731         __be32 *p;
1732
1733         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1734                 decode_bind_conn_to_session_maxsz, hdr);
1735         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1736         p = xdr_reserve_space(xdr, 8);
1737         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1738         *p = 0; /* use_conn_in_rdma_mode = False */
1739 }
1740
1741 static void encode_exchange_id(struct xdr_stream *xdr,
1742                                struct nfs41_exchange_id_args *args,
1743                                struct compound_hdr *hdr)
1744 {
1745         __be32 *p;
1746         char impl_name[IMPL_NAME_LIMIT];
1747         int len = 0;
1748
1749         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1750         encode_nfs4_verifier(xdr, args->verifier);
1751
1752         encode_string(xdr, args->id_len, args->id);
1753
1754         p = reserve_space(xdr, 12);
1755         *p++ = cpu_to_be32(args->flags);
1756         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1757
1758         if (send_implementation_id &&
1759             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1760             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1761                 <= sizeof(impl_name) + 1)
1762                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1763                                utsname()->sysname, utsname()->release,
1764                                utsname()->version, utsname()->machine);
1765
1766         if (len > 0) {
1767                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1768
1769                 encode_string(xdr,
1770                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1771                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1772                 encode_string(xdr, len, impl_name);
1773                 /* just send zeros for nii_date - the date is in nii_name */
1774                 p = reserve_space(xdr, 12);
1775                 p = xdr_encode_hyper(p, 0);
1776                 *p = cpu_to_be32(0);
1777         } else
1778                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1779 }
1780
1781 static void encode_create_session(struct xdr_stream *xdr,
1782                                   struct nfs41_create_session_args *args,
1783                                   struct compound_hdr *hdr)
1784 {
1785         __be32 *p;
1786         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1787         uint32_t len;
1788         struct nfs_client *clp = args->client;
1789         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1790         u32 max_resp_sz_cached;
1791
1792         /*
1793          * Assumes OPEN is the biggest non-idempotent compound.
1794          * 2 is the verifier.
1795          */
1796         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1797                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1798
1799         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1800                         clp->cl_ipaddr);
1801
1802         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1803         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1804         p = xdr_encode_hyper(p, clp->cl_clientid);
1805         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1806         *p++ = cpu_to_be32(args->flags);                        /*flags */
1807
1808         /* Fore Channel */
1809         *p++ = cpu_to_be32(0);                          /* header padding size */
1810         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1811         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1812         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1813         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1814         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1815         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1816
1817         /* Back Channel */
1818         *p++ = cpu_to_be32(0);                          /* header padding size */
1819         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1820         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1821         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1822         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1823         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1824         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1825
1826         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1827         *p++ = cpu_to_be32(1);
1828         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1829
1830         /* authsys_parms rfc1831 */
1831         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1832         p = xdr_encode_opaque(p, machine_name, len);
1833         *p++ = cpu_to_be32(0);                          /* UID */
1834         *p++ = cpu_to_be32(0);                          /* GID */
1835         *p = cpu_to_be32(0);                            /* No more gids */
1836 }
1837
1838 static void encode_destroy_session(struct xdr_stream *xdr,
1839                                    struct nfs4_session *session,
1840                                    struct compound_hdr *hdr)
1841 {
1842         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1843         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1844 }
1845
1846 static void encode_destroy_clientid(struct xdr_stream *xdr,
1847                                    uint64_t clientid,
1848                                    struct compound_hdr *hdr)
1849 {
1850         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1851         encode_uint64(xdr, clientid);
1852 }
1853
1854 static void encode_reclaim_complete(struct xdr_stream *xdr,
1855                                     struct nfs41_reclaim_complete_args *args,
1856                                     struct compound_hdr *hdr)
1857 {
1858         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1859         encode_uint32(xdr, args->one_fs);
1860 }
1861 #endif /* CONFIG_NFS_V4_1 */
1862
1863 static void encode_sequence(struct xdr_stream *xdr,
1864                             const struct nfs4_sequence_args *args,
1865                             struct compound_hdr *hdr)
1866 {
1867 #if defined(CONFIG_NFS_V4_1)
1868         struct nfs4_session *session;
1869         struct nfs4_slot_table *tp;
1870         struct nfs4_slot *slot = args->sa_slot;
1871         __be32 *p;
1872
1873         if (slot == NULL)
1874                 return;
1875
1876         tp = slot->table;
1877         session = tp->session;
1878
1879         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1880
1881         /*
1882          * Sessionid + seqid + slotid + max slotid + cache_this
1883          */
1884         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1885                 "max_slotid=%d cache_this=%d\n",
1886                 __func__,
1887                 ((u32 *)session->sess_id.data)[0],
1888                 ((u32 *)session->sess_id.data)[1],
1889                 ((u32 *)session->sess_id.data)[2],
1890                 ((u32 *)session->sess_id.data)[3],
1891                 slot->seq_nr, slot->slot_nr,
1892                 tp->highest_used_slotid, args->sa_cache_this);
1893         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1894         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1895         *p++ = cpu_to_be32(slot->seq_nr);
1896         *p++ = cpu_to_be32(slot->slot_nr);
1897         *p++ = cpu_to_be32(tp->highest_used_slotid);
1898         *p = cpu_to_be32(args->sa_cache_this);
1899 #endif /* CONFIG_NFS_V4_1 */
1900 }
1901
1902 #ifdef CONFIG_NFS_V4_1
1903 static void
1904 encode_getdevicelist(struct xdr_stream *xdr,
1905                      const struct nfs4_getdevicelist_args *args,
1906                      struct compound_hdr *hdr)
1907 {
1908         __be32 *p;
1909         nfs4_verifier dummy = {
1910                 .data = "dummmmmy",
1911         };
1912
1913         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1914         p = reserve_space(xdr, 16);
1915         *p++ = cpu_to_be32(args->layoutclass);
1916         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1917         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1918         encode_nfs4_verifier(xdr, &dummy);
1919 }
1920
1921 static void
1922 encode_getdeviceinfo(struct xdr_stream *xdr,
1923                      const struct nfs4_getdeviceinfo_args *args,
1924                      struct compound_hdr *hdr)
1925 {
1926         __be32 *p;
1927
1928         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1929         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1930         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1931                                     NFS4_DEVICEID4_SIZE);
1932         *p++ = cpu_to_be32(args->pdev->layout_type);
1933         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1934         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1935 }
1936
1937 static void
1938 encode_layoutget(struct xdr_stream *xdr,
1939                       const struct nfs4_layoutget_args *args,
1940                       struct compound_hdr *hdr)
1941 {
1942         __be32 *p;
1943
1944         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1945         p = reserve_space(xdr, 36);
1946         *p++ = cpu_to_be32(0);     /* Signal layout available */
1947         *p++ = cpu_to_be32(args->type);
1948         *p++ = cpu_to_be32(args->range.iomode);
1949         p = xdr_encode_hyper(p, args->range.offset);
1950         p = xdr_encode_hyper(p, args->range.length);
1951         p = xdr_encode_hyper(p, args->minlength);
1952         encode_nfs4_stateid(xdr, &args->stateid);
1953         encode_uint32(xdr, args->maxcount);
1954
1955         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1956                 __func__,
1957                 args->type,
1958                 args->range.iomode,
1959                 (unsigned long)args->range.offset,
1960                 (unsigned long)args->range.length,
1961                 args->maxcount);
1962 }
1963
1964 static int
1965 encode_layoutcommit(struct xdr_stream *xdr,
1966                     struct inode *inode,
1967                     const struct nfs4_layoutcommit_args *args,
1968                     struct compound_hdr *hdr)
1969 {
1970         __be32 *p;
1971
1972         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1973                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1974
1975         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1976         p = reserve_space(xdr, 20);
1977         /* Only whole file layouts */
1978         p = xdr_encode_hyper(p, 0); /* offset */
1979         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1980         *p = cpu_to_be32(0); /* reclaim */
1981         encode_nfs4_stateid(xdr, &args->stateid);
1982         p = reserve_space(xdr, 20);
1983         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1984         p = xdr_encode_hyper(p, args->lastbytewritten);
1985         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1986         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1987
1988         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1989                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1990                         NFS_I(inode)->layout, xdr, args);
1991         else
1992                 encode_uint32(xdr, 0); /* no layout-type payload */
1993
1994         return 0;
1995 }
1996
1997 static void
1998 encode_layoutreturn(struct xdr_stream *xdr,
1999                     const struct nfs4_layoutreturn_args *args,
2000                     struct compound_hdr *hdr)
2001 {
2002         __be32 *p;
2003
2004         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2005         p = reserve_space(xdr, 16);
2006         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2007         *p++ = cpu_to_be32(args->layout_type);
2008         *p++ = cpu_to_be32(IOMODE_ANY);
2009         *p = cpu_to_be32(RETURN_FILE);
2010         p = reserve_space(xdr, 16);
2011         p = xdr_encode_hyper(p, 0);
2012         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2013         spin_lock(&args->inode->i_lock);
2014         encode_nfs4_stateid(xdr, &args->stateid);
2015         spin_unlock(&args->inode->i_lock);
2016         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2017                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2018                         NFS_I(args->inode)->layout, xdr, args);
2019         } else
2020                 encode_uint32(xdr, 0);
2021 }
2022
2023 static int
2024 encode_secinfo_no_name(struct xdr_stream *xdr,
2025                        const struct nfs41_secinfo_no_name_args *args,
2026                        struct compound_hdr *hdr)
2027 {
2028         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2029         encode_uint32(xdr, args->style);
2030         return 0;
2031 }
2032
2033 static void encode_test_stateid(struct xdr_stream *xdr,
2034                                 struct nfs41_test_stateid_args *args,
2035                                 struct compound_hdr *hdr)
2036 {
2037         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2038         encode_uint32(xdr, 1);
2039         encode_nfs4_stateid(xdr, args->stateid);
2040 }
2041
2042 static void encode_free_stateid(struct xdr_stream *xdr,
2043                                 struct nfs41_free_stateid_args *args,
2044                                 struct compound_hdr *hdr)
2045 {
2046         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2047         encode_nfs4_stateid(xdr, &args->stateid);
2048 }
2049 #endif /* CONFIG_NFS_V4_1 */
2050
2051 /*
2052  * END OF "GENERIC" ENCODE ROUTINES.
2053  */
2054
2055 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2056 {
2057 #if defined(CONFIG_NFS_V4_1)
2058
2059         if (args->sa_slot)
2060                 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2061 #endif /* CONFIG_NFS_V4_1 */
2062         return 0;
2063 }
2064
2065 /*
2066  * Encode an ACCESS request
2067  */
2068 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2069                                 const struct nfs4_accessargs *args)
2070 {
2071         struct compound_hdr hdr = {
2072                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2073         };
2074
2075         encode_compound_hdr(xdr, req, &hdr);
2076         encode_sequence(xdr, &args->seq_args, &hdr);
2077         encode_putfh(xdr, args->fh, &hdr);
2078         encode_access(xdr, args->access, &hdr);
2079         encode_getfattr(xdr, args->bitmask, &hdr);
2080         encode_nops(&hdr);
2081 }
2082
2083 /*
2084  * Encode LOOKUP request
2085  */
2086 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2087                                 const struct nfs4_lookup_arg *args)
2088 {
2089         struct compound_hdr hdr = {
2090                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2091         };
2092
2093         encode_compound_hdr(xdr, req, &hdr);
2094         encode_sequence(xdr, &args->seq_args, &hdr);
2095         encode_putfh(xdr, args->dir_fh, &hdr);
2096         encode_lookup(xdr, args->name, &hdr);
2097         encode_getfh(xdr, &hdr);
2098         encode_getfattr(xdr, args->bitmask, &hdr);
2099         encode_nops(&hdr);
2100 }
2101
2102 /*
2103  * Encode LOOKUP_ROOT request
2104  */
2105 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2106                                      struct xdr_stream *xdr,
2107                                      const struct nfs4_lookup_root_arg *args)
2108 {
2109         struct compound_hdr hdr = {
2110                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2111         };
2112
2113         encode_compound_hdr(xdr, req, &hdr);
2114         encode_sequence(xdr, &args->seq_args, &hdr);
2115         encode_putrootfh(xdr, &hdr);
2116         encode_getfh(xdr, &hdr);
2117         encode_getfattr(xdr, args->bitmask, &hdr);
2118         encode_nops(&hdr);
2119 }
2120
2121 /*
2122  * Encode REMOVE request
2123  */
2124 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2125                                 const struct nfs_removeargs *args)
2126 {
2127         struct compound_hdr hdr = {
2128                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2129         };
2130
2131         encode_compound_hdr(xdr, req, &hdr);
2132         encode_sequence(xdr, &args->seq_args, &hdr);
2133         encode_putfh(xdr, args->fh, &hdr);
2134         encode_remove(xdr, &args->name, &hdr);
2135         encode_nops(&hdr);
2136 }
2137
2138 /*
2139  * Encode RENAME request
2140  */
2141 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2142                                 const struct nfs_renameargs *args)
2143 {
2144         struct compound_hdr hdr = {
2145                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2146         };
2147
2148         encode_compound_hdr(xdr, req, &hdr);
2149         encode_sequence(xdr, &args->seq_args, &hdr);
2150         encode_putfh(xdr, args->old_dir, &hdr);
2151         encode_savefh(xdr, &hdr);
2152         encode_putfh(xdr, args->new_dir, &hdr);
2153         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2154         encode_nops(&hdr);
2155 }
2156
2157 /*
2158  * Encode LINK request
2159  */
2160 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2161                              const struct nfs4_link_arg *args)
2162 {
2163         struct compound_hdr hdr = {
2164                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2165         };
2166
2167         encode_compound_hdr(xdr, req, &hdr);
2168         encode_sequence(xdr, &args->seq_args, &hdr);
2169         encode_putfh(xdr, args->fh, &hdr);
2170         encode_savefh(xdr, &hdr);
2171         encode_putfh(xdr, args->dir_fh, &hdr);
2172         encode_link(xdr, args->name, &hdr);
2173         encode_restorefh(xdr, &hdr);
2174         encode_getfattr(xdr, args->bitmask, &hdr);
2175         encode_nops(&hdr);
2176 }
2177
2178 /*
2179  * Encode CREATE request
2180  */
2181 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2182                                 const struct nfs4_create_arg *args)
2183 {
2184         struct compound_hdr hdr = {
2185                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2186         };
2187
2188         encode_compound_hdr(xdr, req, &hdr);
2189         encode_sequence(xdr, &args->seq_args, &hdr);
2190         encode_putfh(xdr, args->dir_fh, &hdr);
2191         encode_create(xdr, args, &hdr);
2192         encode_getfh(xdr, &hdr);
2193         encode_getfattr(xdr, args->bitmask, &hdr);
2194         encode_nops(&hdr);
2195 }
2196
2197 /*
2198  * Encode SYMLINK request
2199  */
2200 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2201                                  const struct nfs4_create_arg *args)
2202 {
2203         nfs4_xdr_enc_create(req, xdr, args);
2204 }
2205
2206 /*
2207  * Encode GETATTR request
2208  */
2209 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2210                                  const struct nfs4_getattr_arg *args)
2211 {
2212         struct compound_hdr hdr = {
2213                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2214         };
2215
2216         encode_compound_hdr(xdr, req, &hdr);
2217         encode_sequence(xdr, &args->seq_args, &hdr);
2218         encode_putfh(xdr, args->fh, &hdr);
2219         encode_getfattr(xdr, args->bitmask, &hdr);
2220         encode_nops(&hdr);
2221 }
2222
2223 /*
2224  * Encode a CLOSE request
2225  */
2226 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2227                                struct nfs_closeargs *args)
2228 {
2229         struct compound_hdr hdr = {
2230                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231         };
2232
2233         encode_compound_hdr(xdr, req, &hdr);
2234         encode_sequence(xdr, &args->seq_args, &hdr);
2235         encode_putfh(xdr, args->fh, &hdr);
2236         encode_close(xdr, args, &hdr);
2237         encode_getfattr(xdr, args->bitmask, &hdr);
2238         encode_nops(&hdr);
2239 }
2240
2241 /*
2242  * Encode an OPEN request
2243  */
2244 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2245                               struct nfs_openargs *args)
2246 {
2247         struct compound_hdr hdr = {
2248                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2249         };
2250
2251         encode_compound_hdr(xdr, req, &hdr);
2252         encode_sequence(xdr, &args->seq_args, &hdr);
2253         encode_putfh(xdr, args->fh, &hdr);
2254         encode_open(xdr, args, &hdr);
2255         encode_getfh(xdr, &hdr);
2256         if (args->access)
2257                 encode_access(xdr, args->access, &hdr);
2258         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2259         encode_nops(&hdr);
2260 }
2261
2262 /*
2263  * Encode an OPEN_CONFIRM request
2264  */
2265 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2266                                       struct xdr_stream *xdr,
2267                                       struct nfs_open_confirmargs *args)
2268 {
2269         struct compound_hdr hdr = {
2270                 .nops   = 0,
2271         };
2272
2273         encode_compound_hdr(xdr, req, &hdr);
2274         encode_putfh(xdr, args->fh, &hdr);
2275         encode_open_confirm(xdr, args, &hdr);
2276         encode_nops(&hdr);
2277 }
2278
2279 /*
2280  * Encode an OPEN request with no attributes.
2281  */
2282 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2283                                      struct xdr_stream *xdr,
2284                                      struct nfs_openargs *args)
2285 {
2286         struct compound_hdr hdr = {
2287                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2288         };
2289
2290         encode_compound_hdr(xdr, req, &hdr);
2291         encode_sequence(xdr, &args->seq_args, &hdr);
2292         encode_putfh(xdr, args->fh, &hdr);
2293         encode_open(xdr, args, &hdr);
2294         if (args->access)
2295                 encode_access(xdr, args->access, &hdr);
2296         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2297         encode_nops(&hdr);
2298 }
2299
2300 /*
2301  * Encode an OPEN_DOWNGRADE request
2302  */
2303 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2304                                         struct xdr_stream *xdr,
2305                                         struct nfs_closeargs *args)
2306 {
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_downgrade(xdr, args, &hdr);
2315         encode_getfattr(xdr, args->bitmask, &hdr);
2316         encode_nops(&hdr);
2317 }
2318
2319 /*
2320  * Encode a LOCK request
2321  */
2322 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2323                               struct nfs_lock_args *args)
2324 {
2325         struct compound_hdr hdr = {
2326                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2327         };
2328
2329         encode_compound_hdr(xdr, req, &hdr);
2330         encode_sequence(xdr, &args->seq_args, &hdr);
2331         encode_putfh(xdr, args->fh, &hdr);
2332         encode_lock(xdr, args, &hdr);
2333         encode_nops(&hdr);
2334 }
2335
2336 /*
2337  * Encode a LOCKT request
2338  */
2339 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2340                                struct nfs_lockt_args *args)
2341 {
2342         struct compound_hdr hdr = {
2343                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2344         };
2345
2346         encode_compound_hdr(xdr, req, &hdr);
2347         encode_sequence(xdr, &args->seq_args, &hdr);
2348         encode_putfh(xdr, args->fh, &hdr);
2349         encode_lockt(xdr, args, &hdr);
2350         encode_nops(&hdr);
2351 }
2352
2353 /*
2354  * Encode a LOCKU request
2355  */
2356 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2357                                struct nfs_locku_args *args)
2358 {
2359         struct compound_hdr hdr = {
2360                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2361         };
2362
2363         encode_compound_hdr(xdr, req, &hdr);
2364         encode_sequence(xdr, &args->seq_args, &hdr);
2365         encode_putfh(xdr, args->fh, &hdr);
2366         encode_locku(xdr, args, &hdr);
2367         encode_nops(&hdr);
2368 }
2369
2370 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2371                                            struct xdr_stream *xdr,
2372                                         struct nfs_release_lockowner_args *args)
2373 {
2374         struct compound_hdr hdr = {
2375                 .minorversion = 0,
2376         };
2377
2378         encode_compound_hdr(xdr, req, &hdr);
2379         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2380         encode_nops(&hdr);
2381 }
2382
2383 /*
2384  * Encode a READLINK request
2385  */
2386 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2387                                   const struct nfs4_readlink *args)
2388 {
2389         struct compound_hdr hdr = {
2390                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2391         };
2392
2393         encode_compound_hdr(xdr, req, &hdr);
2394         encode_sequence(xdr, &args->seq_args, &hdr);
2395         encode_putfh(xdr, args->fh, &hdr);
2396         encode_readlink(xdr, args, req, &hdr);
2397
2398         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2399                         args->pgbase, args->pglen);
2400         encode_nops(&hdr);
2401 }
2402
2403 /*
2404  * Encode a READDIR request
2405  */
2406 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2407                                  const struct nfs4_readdir_arg *args)
2408 {
2409         struct compound_hdr hdr = {
2410                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2411         };
2412
2413         encode_compound_hdr(xdr, req, &hdr);
2414         encode_sequence(xdr, &args->seq_args, &hdr);
2415         encode_putfh(xdr, args->fh, &hdr);
2416         encode_readdir(xdr, args, req, &hdr);
2417
2418         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2419                          args->pgbase, args->count);
2420         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2421                         __func__, hdr.replen << 2, args->pages,
2422                         args->pgbase, args->count);
2423         encode_nops(&hdr);
2424 }
2425
2426 /*
2427  * Encode a READ request
2428  */
2429 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2430                               struct nfs_readargs *args)
2431 {
2432         struct compound_hdr hdr = {
2433                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2434         };
2435
2436         encode_compound_hdr(xdr, req, &hdr);
2437         encode_sequence(xdr, &args->seq_args, &hdr);
2438         encode_putfh(xdr, args->fh, &hdr);
2439         encode_read(xdr, args, &hdr);
2440
2441         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2442                          args->pages, args->pgbase, args->count);
2443         req->rq_rcv_buf.flags |= XDRBUF_READ;
2444         encode_nops(&hdr);
2445 }
2446
2447 /*
2448  * Encode an SETATTR request
2449  */
2450 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2451                                  struct nfs_setattrargs *args)
2452 {
2453         struct compound_hdr hdr = {
2454                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2455         };
2456
2457         encode_compound_hdr(xdr, req, &hdr);
2458         encode_sequence(xdr, &args->seq_args, &hdr);
2459         encode_putfh(xdr, args->fh, &hdr);
2460         encode_setattr(xdr, args, args->server, &hdr);
2461         encode_getfattr(xdr, args->bitmask, &hdr);
2462         encode_nops(&hdr);
2463 }
2464
2465 /*
2466  * Encode a GETACL request
2467  */
2468 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2469                                 struct nfs_getaclargs *args)
2470 {
2471         struct compound_hdr hdr = {
2472                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2473         };
2474         uint32_t replen;
2475
2476         encode_compound_hdr(xdr, req, &hdr);
2477         encode_sequence(xdr, &args->seq_args, &hdr);
2478         encode_putfh(xdr, args->fh, &hdr);
2479         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2480         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2481
2482         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2483                 args->acl_pages, args->acl_pgbase, args->acl_len);
2484
2485         encode_nops(&hdr);
2486 }
2487
2488 /*
2489  * Encode a WRITE request
2490  */
2491 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2492                                struct nfs_writeargs *args)
2493 {
2494         struct compound_hdr hdr = {
2495                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496         };
2497
2498         encode_compound_hdr(xdr, req, &hdr);
2499         encode_sequence(xdr, &args->seq_args, &hdr);
2500         encode_putfh(xdr, args->fh, &hdr);
2501         encode_write(xdr, args, &hdr);
2502         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2503         if (args->bitmask)
2504                 encode_getfattr(xdr, args->bitmask, &hdr);
2505         encode_nops(&hdr);
2506 }
2507
2508 /*
2509  *  a COMMIT request
2510  */
2511 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2512                                 struct nfs_commitargs *args)
2513 {
2514         struct compound_hdr hdr = {
2515                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2516         };
2517
2518         encode_compound_hdr(xdr, req, &hdr);
2519         encode_sequence(xdr, &args->seq_args, &hdr);
2520         encode_putfh(xdr, args->fh, &hdr);
2521         encode_commit(xdr, args, &hdr);
2522         encode_nops(&hdr);
2523 }
2524
2525 /*
2526  * FSINFO request
2527  */
2528 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2529                                 struct nfs4_fsinfo_arg *args)
2530 {
2531         struct compound_hdr hdr = {
2532                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2533         };
2534
2535         encode_compound_hdr(xdr, req, &hdr);
2536         encode_sequence(xdr, &args->seq_args, &hdr);
2537         encode_putfh(xdr, args->fh, &hdr);
2538         encode_fsinfo(xdr, args->bitmask, &hdr);
2539         encode_nops(&hdr);
2540 }
2541
2542 /*
2543  * a PATHCONF request
2544  */
2545 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2546                                   const struct nfs4_pathconf_arg *args)
2547 {
2548         struct compound_hdr hdr = {
2549                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2550         };
2551
2552         encode_compound_hdr(xdr, req, &hdr);
2553         encode_sequence(xdr, &args->seq_args, &hdr);
2554         encode_putfh(xdr, args->fh, &hdr);
2555         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2556                            &hdr);
2557         encode_nops(&hdr);
2558 }
2559
2560 /*
2561  * a STATFS request
2562  */
2563 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2564                                 const struct nfs4_statfs_arg *args)
2565 {
2566         struct compound_hdr hdr = {
2567                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2568         };
2569
2570         encode_compound_hdr(xdr, req, &hdr);
2571         encode_sequence(xdr, &args->seq_args, &hdr);
2572         encode_putfh(xdr, args->fh, &hdr);
2573         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2574                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2575         encode_nops(&hdr);
2576 }
2577
2578 /*
2579  * GETATTR_BITMAP request
2580  */
2581 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2582                                      struct xdr_stream *xdr,
2583                                      struct nfs4_server_caps_arg *args)
2584 {
2585         struct compound_hdr hdr = {
2586                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2587         };
2588
2589         encode_compound_hdr(xdr, req, &hdr);
2590         encode_sequence(xdr, &args->seq_args, &hdr);
2591         encode_putfh(xdr, args->fhandle, &hdr);
2592         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2593                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2594                            FATTR4_WORD0_LINK_SUPPORT|
2595                            FATTR4_WORD0_SYMLINK_SUPPORT|
2596                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2597         encode_nops(&hdr);
2598 }
2599
2600 /*
2601  * a RENEW request
2602  */
2603 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2604                                struct nfs_client *clp)
2605 {
2606         struct compound_hdr hdr = {
2607                 .nops   = 0,
2608         };
2609
2610         encode_compound_hdr(xdr, req, &hdr);
2611         encode_renew(xdr, clp->cl_clientid, &hdr);
2612         encode_nops(&hdr);
2613 }
2614
2615 /*
2616  * a SETCLIENTID request
2617  */
2618 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2619                                      struct xdr_stream *xdr,
2620                                      struct nfs4_setclientid *sc)
2621 {
2622         struct compound_hdr hdr = {
2623                 .nops   = 0,
2624         };
2625
2626         encode_compound_hdr(xdr, req, &hdr);
2627         encode_setclientid(xdr, sc, &hdr);
2628         encode_nops(&hdr);
2629 }
2630
2631 /*
2632  * a SETCLIENTID_CONFIRM request
2633  */
2634 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2635                                              struct xdr_stream *xdr,
2636                                              struct nfs4_setclientid_res *arg)
2637 {
2638         struct compound_hdr hdr = {
2639                 .nops   = 0,
2640         };
2641
2642         encode_compound_hdr(xdr, req, &hdr);
2643         encode_setclientid_confirm(xdr, arg, &hdr);
2644         encode_nops(&hdr);
2645 }
2646
2647 /*
2648  * DELEGRETURN request
2649  */
2650 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2651                                      struct xdr_stream *xdr,
2652                                      const struct nfs4_delegreturnargs *args)
2653 {
2654         struct compound_hdr hdr = {
2655                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2656         };
2657
2658         encode_compound_hdr(xdr, req, &hdr);
2659         encode_sequence(xdr, &args->seq_args, &hdr);
2660         encode_putfh(xdr, args->fhandle, &hdr);
2661         encode_getfattr(xdr, args->bitmask, &hdr);
2662         encode_delegreturn(xdr, args->stateid, &hdr);
2663         encode_nops(&hdr);
2664 }
2665
2666 /*
2667  * Encode FS_LOCATIONS request
2668  */
2669 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2670                                       struct xdr_stream *xdr,
2671                                       struct nfs4_fs_locations_arg *args)
2672 {
2673         struct compound_hdr hdr = {
2674                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2675         };
2676         uint32_t replen;
2677
2678         encode_compound_hdr(xdr, req, &hdr);
2679         encode_sequence(xdr, &args->seq_args, &hdr);
2680         encode_putfh(xdr, args->dir_fh, &hdr);
2681         encode_lookup(xdr, args->name, &hdr);
2682         replen = hdr.replen;    /* get the attribute into args->page */
2683         encode_fs_locations(xdr, args->bitmask, &hdr);
2684
2685         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2686                         0, PAGE_SIZE);
2687         encode_nops(&hdr);
2688 }
2689
2690 /*
2691  * Encode SECINFO request
2692  */
2693 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2694                                 struct xdr_stream *xdr,
2695                                 struct nfs4_secinfo_arg *args)
2696 {
2697         struct compound_hdr hdr = {
2698                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2699         };
2700
2701         encode_compound_hdr(xdr, req, &hdr);
2702         encode_sequence(xdr, &args->seq_args, &hdr);
2703         encode_putfh(xdr, args->dir_fh, &hdr);
2704         encode_secinfo(xdr, args->name, &hdr);
2705         encode_nops(&hdr);
2706 }
2707
2708 #if defined(CONFIG_NFS_V4_1)
2709 /*
2710  * BIND_CONN_TO_SESSION request
2711  */
2712 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2713                                 struct xdr_stream *xdr,
2714                                 struct nfs_client *clp)
2715 {
2716         struct compound_hdr hdr = {
2717                 .minorversion = clp->cl_mvops->minor_version,
2718         };
2719
2720         encode_compound_hdr(xdr, req, &hdr);
2721         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2722         encode_nops(&hdr);
2723 }
2724
2725 /*
2726  * EXCHANGE_ID request
2727  */
2728 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2729                                      struct xdr_stream *xdr,
2730                                      struct nfs41_exchange_id_args *args)
2731 {
2732         struct compound_hdr hdr = {
2733                 .minorversion = args->client->cl_mvops->minor_version,
2734         };
2735
2736         encode_compound_hdr(xdr, req, &hdr);
2737         encode_exchange_id(xdr, args, &hdr);
2738         encode_nops(&hdr);
2739 }
2740
2741 /*
2742  * a CREATE_SESSION request
2743  */
2744 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2745                                         struct xdr_stream *xdr,
2746                                         struct nfs41_create_session_args *args)
2747 {
2748         struct compound_hdr hdr = {
2749                 .minorversion = args->client->cl_mvops->minor_version,
2750         };
2751
2752         encode_compound_hdr(xdr, req, &hdr);
2753         encode_create_session(xdr, args, &hdr);
2754         encode_nops(&hdr);
2755 }
2756
2757 /*
2758  * a DESTROY_SESSION request
2759  */
2760 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2761                                          struct xdr_stream *xdr,
2762                                          struct nfs4_session *session)
2763 {
2764         struct compound_hdr hdr = {
2765                 .minorversion = session->clp->cl_mvops->minor_version,
2766         };
2767
2768         encode_compound_hdr(xdr, req, &hdr);
2769         encode_destroy_session(xdr, session, &hdr);
2770         encode_nops(&hdr);
2771 }
2772
2773 /*
2774  * a DESTROY_CLIENTID request
2775  */
2776 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2777                                          struct xdr_stream *xdr,
2778                                          struct nfs_client *clp)
2779 {
2780         struct compound_hdr hdr = {
2781                 .minorversion = clp->cl_mvops->minor_version,
2782         };
2783
2784         encode_compound_hdr(xdr, req, &hdr);
2785         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2786         encode_nops(&hdr);
2787 }
2788
2789 /*
2790  * a SEQUENCE request
2791  */
2792 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2793                                   struct nfs4_sequence_args *args)
2794 {
2795         struct compound_hdr hdr = {
2796                 .minorversion = nfs4_xdr_minorversion(args),
2797         };
2798
2799         encode_compound_hdr(xdr, req, &hdr);
2800         encode_sequence(xdr, args, &hdr);
2801         encode_nops(&hdr);
2802 }
2803
2804 /*
2805  * a GET_LEASE_TIME request
2806  */
2807 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2808                                         struct xdr_stream *xdr,
2809                                         struct nfs4_get_lease_time_args *args)
2810 {
2811         struct compound_hdr hdr = {
2812                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2813         };
2814         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2815
2816         encode_compound_hdr(xdr, req, &hdr);
2817         encode_sequence(xdr, &args->la_seq_args, &hdr);
2818         encode_putrootfh(xdr, &hdr);
2819         encode_fsinfo(xdr, lease_bitmap, &hdr);
2820         encode_nops(&hdr);
2821 }
2822
2823 /*
2824  * a RECLAIM_COMPLETE request
2825  */
2826 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2827                                           struct xdr_stream *xdr,
2828                                 struct nfs41_reclaim_complete_args *args)
2829 {
2830         struct compound_hdr hdr = {
2831                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2832         };
2833
2834         encode_compound_hdr(xdr, req, &hdr);
2835         encode_sequence(xdr, &args->seq_args, &hdr);
2836         encode_reclaim_complete(xdr, args, &hdr);
2837         encode_nops(&hdr);
2838 }
2839
2840 /*
2841  * Encode GETDEVICELIST request
2842  */
2843 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2844                                        struct xdr_stream *xdr,
2845                                        struct nfs4_getdevicelist_args *args)
2846 {
2847         struct compound_hdr hdr = {
2848                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2849         };
2850
2851         encode_compound_hdr(xdr, req, &hdr);
2852         encode_sequence(xdr, &args->seq_args, &hdr);
2853         encode_putfh(xdr, args->fh, &hdr);
2854         encode_getdevicelist(xdr, args, &hdr);
2855         encode_nops(&hdr);
2856 }
2857
2858 /*
2859  * Encode GETDEVICEINFO request
2860  */
2861 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2862                                        struct xdr_stream *xdr,
2863                                        struct nfs4_getdeviceinfo_args *args)
2864 {
2865         struct compound_hdr hdr = {
2866                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2867         };
2868
2869         encode_compound_hdr(xdr, req, &hdr);
2870         encode_sequence(xdr, &args->seq_args, &hdr);
2871         encode_getdeviceinfo(xdr, args, &hdr);
2872
2873         /* set up reply kvec. Subtract notification bitmap max size (2)
2874          * so that notification bitmap is put in xdr_buf tail */
2875         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2876                          args->pdev->pages, args->pdev->pgbase,
2877                          args->pdev->pglen);
2878
2879         encode_nops(&hdr);
2880 }
2881
2882 /*
2883  *  Encode LAYOUTGET request
2884  */
2885 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2886                                    struct xdr_stream *xdr,
2887                                    struct nfs4_layoutget_args *args)
2888 {
2889         struct compound_hdr hdr = {
2890                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2891         };
2892
2893         encode_compound_hdr(xdr, req, &hdr);
2894         encode_sequence(xdr, &args->seq_args, &hdr);
2895         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2896         encode_layoutget(xdr, args, &hdr);
2897
2898         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2899             args->layout.pages, 0, args->layout.pglen);
2900
2901         encode_nops(&hdr);
2902 }
2903
2904 /*
2905  *  Encode LAYOUTCOMMIT request
2906  */
2907 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2908                                       struct xdr_stream *xdr,
2909                                       struct nfs4_layoutcommit_args *args)
2910 {
2911         struct nfs4_layoutcommit_data *data =
2912                 container_of(args, struct nfs4_layoutcommit_data, args);
2913         struct compound_hdr hdr = {
2914                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2915         };
2916
2917         encode_compound_hdr(xdr, req, &hdr);
2918         encode_sequence(xdr, &args->seq_args, &hdr);
2919         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2920         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2921         encode_getfattr(xdr, args->bitmask, &hdr);
2922         encode_nops(&hdr);
2923 }
2924
2925 /*
2926  * Encode LAYOUTRETURN request
2927  */
2928 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2929                                       struct xdr_stream *xdr,
2930                                       struct nfs4_layoutreturn_args *args)
2931 {
2932         struct compound_hdr hdr = {
2933                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2934         };
2935
2936         encode_compound_hdr(xdr, req, &hdr);
2937         encode_sequence(xdr, &args->seq_args, &hdr);
2938         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2939         encode_layoutreturn(xdr, args, &hdr);
2940         encode_nops(&hdr);
2941 }
2942
2943 /*
2944  * Encode SECINFO_NO_NAME request
2945  */
2946 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2947                                         struct xdr_stream *xdr,
2948                                         struct nfs41_secinfo_no_name_args *args)
2949 {
2950         struct compound_hdr hdr = {
2951                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2952         };
2953
2954         encode_compound_hdr(xdr, req, &hdr);
2955         encode_sequence(xdr, &args->seq_args, &hdr);
2956         encode_putrootfh(xdr, &hdr);
2957         encode_secinfo_no_name(xdr, args, &hdr);
2958         encode_nops(&hdr);
2959         return 0;
2960 }
2961
2962 /*
2963  *  Encode TEST_STATEID request
2964  */
2965 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2966                                       struct xdr_stream *xdr,
2967                                       struct nfs41_test_stateid_args *args)
2968 {
2969         struct compound_hdr hdr = {
2970                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2971         };
2972
2973         encode_compound_hdr(xdr, req, &hdr);
2974         encode_sequence(xdr, &args->seq_args, &hdr);
2975         encode_test_stateid(xdr, args, &hdr);
2976         encode_nops(&hdr);
2977 }
2978
2979 /*
2980  *  Encode FREE_STATEID request
2981  */
2982 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2983                                      struct xdr_stream *xdr,
2984                                      struct nfs41_free_stateid_args *args)
2985 {
2986         struct compound_hdr hdr = {
2987                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2988         };
2989
2990         encode_compound_hdr(xdr, req, &hdr);
2991         encode_sequence(xdr, &args->seq_args, &hdr);
2992         encode_free_stateid(xdr, args, &hdr);
2993         encode_nops(&hdr);
2994 }
2995 #endif /* CONFIG_NFS_V4_1 */
2996
2997 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2998 {
2999         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3000                 "Remaining buffer length is %tu words.\n",
3001                 func, xdr->end - xdr->p);
3002 }
3003
3004 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3005 {
3006         __be32 *p;
3007
3008         p = xdr_inline_decode(xdr, 4);
3009         if (unlikely(!p))
3010                 goto out_overflow;
3011         *len = be32_to_cpup(p);
3012         p = xdr_inline_decode(xdr, *len);
3013         if (unlikely(!p))
3014                 goto out_overflow;
3015         *string = (char *)p;
3016         return 0;
3017 out_overflow:
3018         print_overflow_msg(__func__, xdr);
3019         return -EIO;
3020 }
3021
3022 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3023 {
3024         __be32 *p;
3025
3026         p = xdr_inline_decode(xdr, 8);
3027         if (unlikely(!p))
3028                 goto out_overflow;
3029         hdr->status = be32_to_cpup(p++);
3030         hdr->taglen = be32_to_cpup(p);
3031
3032         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3033         if (unlikely(!p))
3034                 goto out_overflow;
3035         hdr->tag = (char *)p;
3036         p += XDR_QUADLEN(hdr->taglen);
3037         hdr->nops = be32_to_cpup(p);
3038         if (unlikely(hdr->nops < 1))
3039                 return nfs4_stat_to_errno(hdr->status);
3040         return 0;
3041 out_overflow:
3042         print_overflow_msg(__func__, xdr);
3043         return -EIO;
3044 }
3045
3046 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3047 {
3048         __be32 *p;
3049         uint32_t opnum;
3050         int32_t nfserr;
3051
3052         p = xdr_inline_decode(xdr, 8);
3053         if (unlikely(!p))
3054                 goto out_overflow;
3055         opnum = be32_to_cpup(p++);
3056         if (opnum != expected) {
3057                 dprintk("nfs: Server returned operation"
3058                         " %d but we issued a request for %d\n",
3059                                 opnum, expected);
3060                 return -EIO;
3061         }
3062         nfserr = be32_to_cpup(p);
3063         if (nfserr != NFS_OK)
3064                 return nfs4_stat_to_errno(nfserr);
3065         return 0;
3066 out_overflow:
3067         print_overflow_msg(__func__, xdr);
3068         return -EIO;
3069 }
3070
3071 /* Dummy routine */
3072 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3073 {
3074         __be32 *p;
3075         unsigned int strlen;
3076         char *str;
3077
3078         p = xdr_inline_decode(xdr, 12);
3079         if (likely(p))
3080                 return decode_opaque_inline(xdr, &strlen, &str);
3081         print_overflow_msg(__func__, xdr);
3082         return -EIO;
3083 }
3084
3085 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3086 {
3087         uint32_t bmlen;
3088         __be32 *p;
3089
3090         p = xdr_inline_decode(xdr, 4);
3091         if (unlikely(!p))
3092                 goto out_overflow;
3093         bmlen = be32_to_cpup(p);
3094
3095         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3096         p = xdr_inline_decode(xdr, (bmlen << 2));
3097         if (unlikely(!p))
3098                 goto out_overflow;
3099         if (bmlen > 0) {
3100                 bitmap[0] = be32_to_cpup(p++);
3101                 if (bmlen > 1) {
3102                         bitmap[1] = be32_to_cpup(p++);
3103                         if (bmlen > 2)
3104                                 bitmap[2] = be32_to_cpup(p);
3105                 }
3106         }
3107         return 0;
3108 out_overflow:
3109         print_overflow_msg(__func__, xdr);
3110         return -EIO;
3111 }
3112
3113 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3114 {
3115         __be32 *p;
3116
3117         p = xdr_inline_decode(xdr, 4);
3118         if (unlikely(!p))
3119                 goto out_overflow;
3120         *attrlen = be32_to_cpup(p);
3121         *savep = xdr_stream_pos(xdr);
3122         return 0;
3123 out_overflow:
3124         print_overflow_msg(__func__, xdr);
3125         return -EIO;
3126 }
3127
3128 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3129 {
3130         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3131                 int ret;
3132                 ret = decode_attr_bitmap(xdr, bitmask);
3133                 if (unlikely(ret < 0))
3134                         return ret;
3135                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3136         } else
3137                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3138         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3139                 bitmask[0], bitmask[1], bitmask[2]);
3140         return 0;
3141 }
3142
3143 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3144 {
3145         __be32 *p;
3146         int ret = 0;
3147
3148         *type = 0;
3149         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3150                 return -EIO;
3151         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3152                 p = xdr_inline_decode(xdr, 4);
3153                 if (unlikely(!p))
3154                         goto out_overflow;
3155                 *type = be32_to_cpup(p);
3156                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3157                         dprintk("%s: bad type %d\n", __func__, *type);
3158                         return -EIO;
3159                 }
3160                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3161                 ret = NFS_ATTR_FATTR_TYPE;
3162         }
3163         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3164         return ret;
3165 out_overflow:
3166         print_overflow_msg(__func__, xdr);
3167         return -EIO;
3168 }
3169
3170 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3171                                       uint32_t *bitmap, uint32_t *type)
3172 {
3173         __be32 *p;
3174
3175         *type = 0;
3176         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3177                 return -EIO;
3178         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3179                 p = xdr_inline_decode(xdr, 4);
3180                 if (unlikely(!p))
3181                         goto out_overflow;
3182                 *type = be32_to_cpup(p);
3183                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3184         }
3185         dprintk("%s: expire type=0x%x\n", __func__, *type);
3186         return 0;
3187 out_overflow:
3188         print_overflow_msg(__func__, xdr);
3189         return -EIO;
3190 }
3191
3192 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3193 {
3194         __be32 *p;
3195         int ret = 0;
3196
3197         *change = 0;
3198         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3199                 return -EIO;
3200         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3201                 p = xdr_inline_decode(xdr, 8);
3202                 if (unlikely(!p))
3203                         goto out_overflow;
3204                 xdr_decode_hyper(p, change);
3205                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3206                 ret = NFS_ATTR_FATTR_CHANGE;
3207         }
3208         dprintk("%s: change attribute=%Lu\n", __func__,
3209                         (unsigned long long)*change);
3210         return ret;
3211 out_overflow:
3212         print_overflow_msg(__func__, xdr);
3213         return -EIO;
3214 }
3215
3216 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3217 {
3218         __be32 *p;
3219         int ret = 0;
3220
3221         *size = 0;
3222         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3223                 return -EIO;
3224         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3225                 p = xdr_inline_decode(xdr, 8);
3226                 if (unlikely(!p))
3227                         goto out_overflow;
3228                 xdr_decode_hyper(p, size);
3229                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3230                 ret = NFS_ATTR_FATTR_SIZE;
3231         }
3232         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3233         return ret;
3234 out_overflow:
3235         print_overflow_msg(__func__, xdr);
3236         return -EIO;
3237 }
3238
3239 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3240 {
3241         __be32 *p;
3242
3243         *res = 0;
3244         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3245                 return -EIO;
3246         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3247                 p = xdr_inline_decode(xdr, 4);
3248                 if (unlikely(!p))
3249                         goto out_overflow;
3250                 *res = be32_to_cpup(p);
3251                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3252         }
3253         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3254         return 0;
3255 out_overflow:
3256         print_overflow_msg(__func__, xdr);
3257         return -EIO;
3258 }
3259
3260 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3261 {
3262         __be32 *p;
3263
3264         *res = 0;
3265         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3266                 return -EIO;
3267         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3268                 p = xdr_inline_decode(xdr, 4);
3269                 if (unlikely(!p))
3270                         goto out_overflow;
3271                 *res = be32_to_cpup(p);
3272                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3273         }
3274         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3275         return 0;
3276 out_overflow:
3277         print_overflow_msg(__func__, xdr);
3278         return -EIO;
3279 }
3280
3281 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3282 {
3283         __be32 *p;
3284         int ret = 0;
3285
3286         fsid->major = 0;
3287         fsid->minor = 0;
3288         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3289                 return -EIO;
3290         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3291                 p = xdr_inline_decode(xdr, 16);
3292                 if (unlikely(!p))
3293                         goto out_overflow;
3294                 p = xdr_decode_hyper(p, &fsid->major);
3295                 xdr_decode_hyper(p, &fsid->minor);
3296                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3297                 ret = NFS_ATTR_FATTR_FSID;
3298         }
3299         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3300                         (unsigned long long)fsid->major,
3301                         (unsigned long long)fsid->minor);
3302         return ret;
3303 out_overflow:
3304         print_overflow_msg(__func__, xdr);
3305         return -EIO;
3306 }
3307
3308 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3309 {
3310         __be32 *p;
3311
3312         *res = 60;
3313         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3314                 return -EIO;
3315         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3316                 p = xdr_inline_decode(xdr, 4);
3317                 if (unlikely(!p))
3318                         goto out_overflow;
3319                 *res = be32_to_cpup(p);
3320                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3321         }
3322         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3323         return 0;
3324 out_overflow:
3325         print_overflow_msg(__func__, xdr);
3326         return -EIO;
3327 }
3328
3329 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3330 {
3331         __be32 *p;
3332
3333         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3334                 return -EIO;
3335         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3336                 p = xdr_inline_decode(xdr, 4);
3337                 if (unlikely(!p))
3338                         goto out_overflow;
3339                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3340                 *res = -be32_to_cpup(p);
3341         }
3342         return 0;
3343 out_overflow:
3344         print_overflow_msg(__func__, xdr);
3345         return -EIO;
3346 }
3347
3348 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3349 {
3350         __be32 *p;
3351         int len;
3352
3353         if (fh != NULL)
3354                 memset(fh, 0, sizeof(*fh));
3355
3356         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3357                 return -EIO;
3358         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3359                 p = xdr_inline_decode(xdr, 4);
3360                 if (unlikely(!p))
3361                         goto out_overflow;
3362                 len = be32_to_cpup(p);
3363                 if (len > NFS4_FHSIZE)
3364                         return -EIO;
3365                 p = xdr_inline_decode(xdr, len);
3366                 if (unlikely(!p))
3367                         goto out_overflow;
3368                 if (fh != NULL) {
3369                         memcpy(fh->data, p, len);
3370                         fh->size = len;
3371                 }
3372                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3373         }
3374         return 0;
3375 out_overflow:
3376         print_overflow_msg(__func__, xdr);
3377         return -EIO;
3378 }
3379
3380 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3381 {
3382         __be32 *p;
3383
3384         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3385         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3386                 return -EIO;
3387         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3388                 p = xdr_inline_decode(xdr, 4);
3389                 if (unlikely(!p))
3390                         goto out_overflow;
3391                 *res = be32_to_cpup(p);
3392                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3393         }
3394         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3395         return 0;
3396 out_overflow:
3397         print_overflow_msg(__func__, xdr);
3398         return -EIO;
3399 }
3400
3401 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3402 {
3403         __be32 *p;
3404         int ret = 0;
3405
3406         *fileid = 0;
3407         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3408                 return -EIO;
3409         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3410                 p = xdr_inline_decode(xdr, 8);
3411                 if (unlikely(!p))
3412                         goto out_overflow;
3413                 xdr_decode_hyper(p, fileid);
3414                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3415                 ret = NFS_ATTR_FATTR_FILEID;
3416         }
3417         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3418         return ret;
3419 out_overflow:
3420         print_overflow_msg(__func__, xdr);
3421         return -EIO;
3422 }
3423
3424 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3425 {
3426         __be32 *p;
3427         int ret = 0;
3428
3429         *fileid = 0;
3430         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3431                 return -EIO;
3432         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3433                 p = xdr_inline_decode(xdr, 8);
3434                 if (unlikely(!p))
3435                         goto out_overflow;
3436                 xdr_decode_hyper(p, fileid);
3437                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3438                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3439         }
3440         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3441         return ret;
3442 out_overflow:
3443         print_overflow_msg(__func__, xdr);
3444         return -EIO;
3445 }
3446
3447 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3448 {
3449         __be32 *p;
3450         int status = 0;
3451
3452         *res = 0;
3453         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3454                 return -EIO;
3455         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3456                 p = xdr_inline_decode(xdr, 8);
3457                 if (unlikely(!p))
3458                         goto out_overflow;
3459                 xdr_decode_hyper(p, res);
3460                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3461         }
3462         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3463         return status;
3464 out_overflow:
3465         print_overflow_msg(__func__, xdr);
3466         return -EIO;
3467 }
3468
3469 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3470 {
3471         __be32 *p;
3472         int status = 0;
3473
3474         *res = 0;
3475         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3476                 return -EIO;
3477         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3478                 p = xdr_inline_decode(xdr, 8);
3479                 if (unlikely(!p))
3480                         goto out_overflow;
3481                 xdr_decode_hyper(p, res);
3482                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3483         }
3484         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3485         return status;
3486 out_overflow:
3487         print_overflow_msg(__func__, xdr);
3488         return -EIO;
3489 }
3490
3491 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3492 {
3493         __be32 *p;
3494         int status = 0;
3495
3496         *res = 0;
3497         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3498                 return -EIO;
3499         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3500                 p = xdr_inline_decode(xdr, 8);
3501                 if (unlikely(!p))
3502                         goto out_overflow;
3503                 xdr_decode_hyper(p, res);
3504                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3505         }
3506         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3507         return status;
3508 out_overflow:
3509         print_overflow_msg(__func__, xdr);
3510         return -EIO;
3511 }
3512
3513 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3514 {
3515         u32 n;
3516         __be32 *p;
3517         int status = 0;
3518
3519         p = xdr_inline_decode(xdr, 4);
3520         if (unlikely(!p))
3521                 goto out_overflow;
3522         n = be32_to_cpup(p);
3523         if (n == 0)
3524                 goto root_path;
3525         dprintk("pathname4: ");
3526         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3527                 dprintk("cannot parse %d components in path\n", n);
3528                 goto out_eio;
3529         }
3530         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3531                 struct nfs4_string *component = &path->components[path->ncomponents];
3532                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3533                 if (unlikely(status != 0))
3534                         goto out_eio;
3535                 ifdebug (XDR)
3536                         pr_cont("%s%.*s ",
3537                                 (path->ncomponents != n ? "/ " : ""),
3538                                 component->len, component->data);
3539         }
3540 out:
3541         return status;
3542 root_path:
3543 /* a root pathname is sent as a zero component4 */
3544         path->ncomponents = 1;
3545         path->components[0].len=0;
3546         path->components[0].data=NULL;
3547         dprintk("pathname4: /\n");
3548         goto out;
3549 out_eio:
3550         dprintk(" status %d", status);
3551         status = -EIO;
3552         goto out;
3553 out_overflow:
3554         print_overflow_msg(__func__, xdr);
3555         return -EIO;
3556 }
3557
3558 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3559 {
3560         int n;
3561         __be32 *p;
3562         int status = -EIO;
3563
3564         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3565                 goto out;
3566         status = 0;
3567         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3568                 goto out;
3569         status = -EIO;
3570         /* Ignore borken servers that return unrequested attrs */
3571         if (unlikely(res == NULL))
3572                 goto out;
3573         dprintk("%s: fsroot:\n", __func__);
3574         status = decode_pathname(xdr, &res->fs_path);
3575         if (unlikely(status != 0))
3576                 goto out;
3577         p = xdr_inline_decode(xdr, 4);
3578         if (unlikely(!p))
3579                 goto out_overflow;
3580         n = be32_to_cpup(p);
3581         if (n <= 0)
3582                 goto out_eio;
3583         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3584                 u32 m;
3585                 struct nfs4_fs_location *loc;
3586
3587                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3588                         break;
3589                 loc = &res->locations[res->nlocations];
3590                 p = xdr_inline_decode(xdr, 4);
3591                 if (unlikely(!p))
3592                         goto out_overflow;
3593                 m = be32_to_cpup(p);
3594
3595                 dprintk("%s: servers:\n", __func__);
3596                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3597                         struct nfs4_string *server;
3598
3599                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3600                                 unsigned int i;
3601                                 dprintk("%s: using first %u of %u servers "
3602                                         "returned for location %u\n",
3603                                                 __func__,
3604                                                 NFS4_FS_LOCATION_MAXSERVERS,
3605                                                 m, res->nlocations);
3606                                 for (i = loc->nservers; i < m; i++) {
3607                                         unsigned int len;
3608                                         char *data;
3609                                         status = decode_opaque_inline(xdr, &len, &data);
3610                                         if (unlikely(status != 0))
3611                                                 goto out_eio;
3612                                 }
3613                                 break;
3614                         }
3615                         server = &loc->servers[loc->nservers];
3616                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3617                         if (unlikely(status != 0))
3618                                 goto out_eio;
3619                         dprintk("%s ", server->data);
3620                 }
3621                 status = decode_pathname(xdr, &loc->rootpath);
3622                 if (unlikely(status != 0))
3623                         goto out_eio;
3624         }
3625         if (res->nlocations != 0)
3626                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3627 out:
3628         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3629         return status;
3630 out_overflow:
3631         print_overflow_msg(__func__, xdr);
3632 out_eio:
3633         status = -EIO;
3634         goto out;
3635 }
3636
3637 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3638 {
3639         __be32 *p;
3640         int status = 0;
3641
3642         *res = 0;
3643         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3644                 return -EIO;
3645         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3646                 p = xdr_inline_decode(xdr, 8);
3647                 if (unlikely(!p))
3648                         goto out_overflow;
3649                 xdr_decode_hyper(p, res);
3650                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3651         }
3652         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3653         return status;
3654 out_overflow:
3655         print_overflow_msg(__func__, xdr);
3656         return -EIO;
3657 }
3658
3659 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3660 {
3661         __be32 *p;
3662         int status = 0;
3663
3664         *maxlink = 1;
3665         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3666                 return -EIO;
3667         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3668                 p = xdr_inline_decode(xdr, 4);
3669                 if (unlikely(!p))
3670                         goto out_overflow;
3671                 *maxlink = be32_to_cpup(p);
3672                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3673         }
3674         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3675         return status;
3676 out_overflow:
3677         print_overflow_msg(__func__, xdr);
3678         return -EIO;
3679 }
3680
3681 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3682 {
3683         __be32 *p;
3684         int status = 0;
3685
3686         *maxname = 1024;
3687         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3688                 return -EIO;
3689         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3690                 p = xdr_inline_decode(xdr, 4);
3691                 if (unlikely(!p))
3692                         goto out_overflow;
3693                 *maxname = be32_to_cpup(p);
3694                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3695         }
3696         dprintk("%s: maxname=%u\n", __func__, *maxname);
3697         return status;
3698 out_overflow:
3699         print_overflow_msg(__func__, xdr);
3700         return -EIO;
3701 }
3702
3703 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3704 {
3705         __be32 *p;
3706         int status = 0;
3707
3708         *res = 1024;
3709         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3710                 return -EIO;
3711         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3712                 uint64_t maxread;
3713                 p = xdr_inline_decode(xdr, 8);
3714                 if (unlikely(!p))
3715                         goto out_overflow;
3716                 xdr_decode_hyper(p, &maxread);
3717                 if (maxread > 0x7FFFFFFF)
3718                         maxread = 0x7FFFFFFF;
3719                 *res = (uint32_t)maxread;
3720                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3721         }
3722         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3723         return status;
3724 out_overflow:
3725         print_overflow_msg(__func__, xdr);
3726         return -EIO;
3727 }
3728
3729 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3730 {
3731         __be32 *p;
3732         int status = 0;
3733
3734         *res = 1024;
3735         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3736                 return -EIO;
3737         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3738                 uint64_t maxwrite;
3739                 p = xdr_inline_decode(xdr, 8);
3740                 if (unlikely(!p))
3741                         goto out_overflow;
3742                 xdr_decode_hyper(p, &maxwrite);
3743                 if (maxwrite > 0x7FFFFFFF)
3744                         maxwrite = 0x7FFFFFFF;
3745                 *res = (uint32_t)maxwrite;
3746                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3747         }
3748         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3749         return status;
3750 out_overflow:
3751         print_overflow_msg(__func__, xdr);
3752         return -EIO;
3753 }
3754
3755 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3756 {
3757         uint32_t tmp;
3758         __be32 *p;
3759         int ret = 0;
3760
3761         *mode = 0;
3762         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3763                 return -EIO;
3764         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3765                 p = xdr_inline_decode(xdr, 4);
3766                 if (unlikely(!p))
3767                         goto out_overflow;
3768                 tmp = be32_to_cpup(p);
3769                 *mode = tmp & ~S_IFMT;
3770                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3771                 ret = NFS_ATTR_FATTR_MODE;
3772         }
3773         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3774         return ret;
3775 out_overflow:
3776         print_overflow_msg(__func__, xdr);
3777         return -EIO;
3778 }
3779
3780 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3781 {
3782         __be32 *p;
3783         int ret = 0;
3784
3785         *nlink = 1;
3786         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3787                 return -EIO;
3788         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3789                 p = xdr_inline_decode(xdr, 4);
3790                 if (unlikely(!p))
3791                         goto out_overflow;
3792                 *nlink = be32_to_cpup(p);
3793                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3794                 ret = NFS_ATTR_FATTR_NLINK;
3795         }
3796         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3797         return ret;
3798 out_overflow:
3799         print_overflow_msg(__func__, xdr);
3800         return -EIO;
3801 }
3802
3803 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3804                 const struct nfs_server *server, kuid_t *uid,
3805                 struct nfs4_string *owner_name)
3806 {
3807         uint32_t len;
3808         __be32 *p;
3809         int ret = 0;
3810
3811         *uid = make_kuid(&init_user_ns, -2);
3812         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3813                 return -EIO;
3814         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3815                 p = xdr_inline_decode(xdr, 4);
3816                 if (unlikely(!p))
3817                         goto out_overflow;
3818                 len = be32_to_cpup(p);
3819                 p = xdr_inline_decode(xdr, len);
3820                 if (unlikely(!p))
3821                         goto out_overflow;
3822                 if (owner_name != NULL) {
3823                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3824                         if (owner_name->data != NULL) {
3825                                 owner_name->len = len;
3826                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3827                         }
3828                 } else if (len < XDR_MAX_NETOBJ) {
3829                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3830                                 ret = NFS_ATTR_FATTR_OWNER;
3831                         else
3832                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3833                                                 __func__);
3834                 } else
3835                         dprintk("%s: name too long (%u)!\n",
3836                                         __func__, len);
3837                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3838         }
3839         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3840         return ret;
3841 out_overflow:
3842         print_overflow_msg(__func__, xdr);
3843         return -EIO;
3844 }
3845
3846 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3847                 const struct nfs_server *server, kgid_t *gid,
3848                 struct nfs4_string *group_name)
3849 {
3850         uint32_t len;
3851         __be32 *p;
3852         int ret = 0;
3853
3854         *gid = make_kgid(&init_user_ns, -2);
3855         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3856                 return -EIO;
3857         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3858                 p = xdr_inline_decode(xdr, 4);
3859                 if (unlikely(!p))
3860                         goto out_overflow;
3861                 len = be32_to_cpup(p);
3862                 p = xdr_inline_decode(xdr, len);
3863                 if (unlikely(!p))
3864                         goto out_overflow;
3865                 if (group_name != NULL) {
3866                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3867                         if (group_name->data != NULL) {
3868                                 group_name->len = len;
3869                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3870                         }
3871                 } else if (len < XDR_MAX_NETOBJ) {
3872                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3873                                 ret = NFS_ATTR_FATTR_GROUP;
3874                         else
3875                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3876                                                 __func__);
3877                 } else
3878                         dprintk("%s: name too long (%u)!\n",
3879                                         __func__, len);
3880                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3881         }
3882         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3883         return ret;
3884 out_overflow:
3885         print_overflow_msg(__func__, xdr);
3886         return -EIO;
3887 }
3888
3889 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3890 {
3891         uint32_t major = 0, minor = 0;
3892         __be32 *p;
3893         int ret = 0;
3894
3895         *rdev = MKDEV(0,0);
3896         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3897                 return -EIO;
3898         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3899                 dev_t tmp;
3900
3901                 p = xdr_inline_decode(xdr, 8);
3902                 if (unlikely(!p))
3903                         goto out_overflow;
3904                 major = be32_to_cpup(p++);
3905                 minor = be32_to_cpup(p);
3906                 tmp = MKDEV(major, minor);
3907                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3908                         *rdev = tmp;
3909                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3910                 ret = NFS_ATTR_FATTR_RDEV;
3911         }
3912         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3913         return ret;
3914 out_overflow:
3915         print_overflow_msg(__func__, xdr);
3916         return -EIO;
3917 }
3918
3919 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3920 {
3921         __be32 *p;
3922         int status = 0;
3923
3924         *res = 0;
3925         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3926                 return -EIO;
3927         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3928                 p = xdr_inline_decode(xdr, 8);
3929                 if (unlikely(!p))
3930                         goto out_overflow;
3931                 xdr_decode_hyper(p, res);
3932                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3933         }
3934         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3935         return status;
3936 out_overflow:
3937         print_overflow_msg(__func__, xdr);
3938         return -EIO;
3939 }
3940
3941 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3942 {
3943         __be32 *p;
3944         int status = 0;
3945
3946         *res = 0;
3947         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3948                 return -EIO;
3949         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3950                 p = xdr_inline_decode(xdr, 8);
3951                 if (unlikely(!p))
3952                         goto out_overflow;
3953                 xdr_decode_hyper(p, res);
3954                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3955         }
3956         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3957         return status;
3958 out_overflow:
3959         print_overflow_msg(__func__, xdr);
3960         return -EIO;
3961 }
3962
3963 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3964 {
3965         __be32 *p;
3966         int status = 0;
3967
3968         *res = 0;
3969         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3970                 return -EIO;
3971         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3972                 p = xdr_inline_decode(xdr, 8);
3973                 if (unlikely(!p))
3974                         goto out_overflow;
3975                 xdr_decode_hyper(p, res);
3976                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3977         }
3978         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3979         return status;
3980 out_overflow:
3981         print_overflow_msg(__func__, xdr);
3982         return -EIO;
3983 }
3984
3985 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3986 {
3987         __be32 *p;
3988         int ret = 0;
3989
3990         *used = 0;
3991         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3992                 return -EIO;
3993         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3994                 p = xdr_inline_decode(xdr, 8);
3995                 if (unlikely(!p))
3996                         goto out_overflow;
3997                 xdr_decode_hyper(p, used);
3998                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3999                 ret = NFS_ATTR_FATTR_SPACE_USED;
4000         }
4001         dprintk("%s: space used=%Lu\n", __func__,
4002                         (unsigned long long)*used);
4003         return ret;
4004 out_overflow:
4005         print_overflow_msg(__func__, xdr);
4006         return -EIO;
4007 }
4008
4009 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4010 {
4011         __be32 *p;
4012         uint64_t sec;
4013         uint32_t nsec;
4014
4015         p = xdr_inline_decode(xdr, 12);
4016         if (unlikely(!p))
4017                 goto out_overflow;
4018         p = xdr_decode_hyper(p, &sec);
4019         nsec = be32_to_cpup(p);
4020         time->tv_sec = (time_t)sec;
4021         time->tv_nsec = (long)nsec;
4022         return 0;
4023 out_overflow:
4024         print_overflow_msg(__func__, xdr);
4025         return -EIO;
4026 }
4027
4028 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4029 {
4030         int status = 0;
4031
4032         time->tv_sec = 0;
4033         time->tv_nsec = 0;
4034         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4035                 return -EIO;
4036         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4037                 status = decode_attr_time(xdr, time);
4038                 if (status == 0)
4039                         status = NFS_ATTR_FATTR_ATIME;
4040                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4041         }
4042         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4043         return status;
4044 }
4045
4046 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4047 {
4048         int status = 0;
4049
4050         time->tv_sec = 0;
4051         time->tv_nsec = 0;
4052         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4053                 return -EIO;
4054         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4055                 status = decode_attr_time(xdr, time);
4056                 if (status == 0)
4057                         status = NFS_ATTR_FATTR_CTIME;
4058                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4059         }
4060         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4061         return status;
4062 }
4063
4064 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4065                                   struct timespec *time)
4066 {
4067         int status = 0;
4068
4069         time->tv_sec = 0;
4070         time->tv_nsec = 0;
4071         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4072                 return -EIO;
4073         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4074                 status = decode_attr_time(xdr, time);
4075                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4076         }
4077         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4078                 (long)time->tv_nsec);
4079         return status;
4080 }
4081
4082 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4083                                         struct nfs4_label *label)
4084 {
4085         uint32_t pi = 0;
4086         uint32_t lfs = 0;
4087         __u32 len;
4088         __be32 *p;
4089         int status = 0;
4090
4091         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4092                 return -EIO;
4093         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4094                 p = xdr_inline_decode(xdr, 4);
4095                 if (unlikely(!p))
4096                         goto out_overflow;
4097                 lfs = be32_to_cpup(p++);
4098                 p = xdr_inline_decode(xdr, 4);
4099                 if (unlikely(!p))
4100                         goto out_overflow;
4101                 pi = be32_to_cpup(p++);
4102                 p = xdr_inline_decode(xdr, 4);
4103                 if (unlikely(!p))
4104                         goto out_overflow;
4105                 len = be32_to_cpup(p++);
4106                 p = xdr_inline_decode(xdr, len);
4107                 if (unlikely(!p))
4108                         goto out_overflow;
4109                 if (len < NFS4_MAXLABELLEN) {
4110                         if (label) {
4111                                 memcpy(label->label, p, len);
4112                                 label->len = len;
4113                                 label->pi = pi;
4114                                 label->lfs = lfs;
4115                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4116                         }
4117                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4118                 } else
4119                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4120                                         __func__, len);
4121         }
4122         if (label && label->label)
4123                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4124                         (char *)label->label, label->len, label->pi, label->lfs);
4125         return status;
4126
4127 out_overflow:
4128         print_overflow_msg(__func__, xdr);
4129         return -EIO;
4130 }
4131
4132 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4133 {
4134         int status = 0;
4135
4136         time->tv_sec = 0;
4137         time->tv_nsec = 0;
4138         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4139                 return -EIO;
4140         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4141                 status = decode_attr_time(xdr, time);
4142                 if (status == 0)
4143                         status = NFS_ATTR_FATTR_MTIME;
4144                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4145         }
4146         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4147         return status;
4148 }
4149
4150 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4151 {
4152         unsigned int attrwords = XDR_QUADLEN(attrlen);
4153         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4154
4155         if (unlikely(attrwords != nwords)) {
4156                 dprintk("%s: server returned incorrect attribute length: "
4157                         "%u %c %u\n",
4158                                 __func__,
4159                                 attrwords << 2,
4160                                 (attrwords < nwords) ? '<' : '>',
4161                                 nwords << 2);
4162                 return -EIO;
4163         }
4164         return 0;
4165 }
4166
4167 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4168 {
4169         __be32 *p;
4170
4171         p = xdr_inline_decode(xdr, 20);
4172         if (unlikely(!p))
4173                 goto out_overflow;
4174         cinfo->atomic = be32_to_cpup(p++);
4175         p = xdr_decode_hyper(p, &cinfo->before);
4176         xdr_decode_hyper(p, &cinfo->after);
4177         return 0;
4178 out_overflow:
4179         print_overflow_msg(__func__, xdr);
4180         return -EIO;
4181 }
4182
4183 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4184 {
4185         __be32 *p;
4186         uint32_t supp, acc;
4187         int status;
4188
4189         status = decode_op_hdr(xdr, OP_ACCESS);
4190         if (status)
4191                 return status;
4192         p = xdr_inline_decode(xdr, 8);
4193         if (unlikely(!p))
4194                 goto out_overflow;
4195         supp = be32_to_cpup(p++);
4196         acc = be32_to_cpup(p);
4197         *supported = supp;
4198         *access = acc;
4199         return 0;
4200 out_overflow:
4201         print_overflow_msg(__func__, xdr);
4202         return -EIO;
4203 }
4204
4205 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4206 {
4207         __be32 *p;
4208
4209         p = xdr_inline_decode(xdr, len);
4210         if (likely(p)) {
4211                 memcpy(buf, p, len);
4212                 return 0;
4213         }
4214         print_overflow_msg(__func__, xdr);
4215         return -EIO;
4216 }
4217
4218 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4219 {
4220         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4221 }
4222
4223 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4224 {
4225         int status;
4226
4227         status = decode_op_hdr(xdr, OP_CLOSE);
4228         if (status != -EIO)
4229                 nfs_increment_open_seqid(status, res->seqid);
4230         if (!status)
4231                 status = decode_stateid(xdr, &res->stateid);
4232         return status;
4233 }
4234
4235 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4236 {
4237         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4238 }
4239
4240 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4241 {
4242         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4243 }
4244
4245 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4246 {
4247         int status;
4248
4249         status = decode_op_hdr(xdr, OP_COMMIT);
4250         if (!status)
4251                 status = decode_write_verifier(xdr, &res->verf->verifier);
4252         return status;
4253 }
4254
4255 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4256 {
4257         __be32 *p;
4258         uint32_t bmlen;
4259         int status;
4260
4261         status = decode_op_hdr(xdr, OP_CREATE);
4262         if (status)
4263                 return status;
4264         if ((status = decode_change_info(xdr, cinfo)))
4265                 return status;
4266         p = xdr_inline_decode(xdr, 4);
4267         if (unlikely(!p))
4268                 goto out_overflow;
4269         bmlen = be32_to_cpup(p);
4270         p = xdr_inline_decode(xdr, bmlen << 2);
4271         if (likely(p))
4272                 return 0;
4273 out_overflow:
4274         print_overflow_msg(__func__, xdr);
4275         return -EIO;
4276 }
4277
4278 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4279 {
4280         unsigned int savep;
4281         uint32_t attrlen, bitmap[3] = {0};
4282         int status;
4283
4284         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4285                 goto xdr_error;
4286         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4287                 goto xdr_error;
4288         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4289                 goto xdr_error;
4290         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4291                 goto xdr_error;
4292         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4293                                                  &res->fh_expire_type)) != 0)
4294                 goto xdr_error;
4295         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4296                 goto xdr_error;
4297         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4298                 goto xdr_error;
4299         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4300                 goto xdr_error;
4301         status = verify_attr_len(xdr, savep, attrlen);
4302 xdr_error:
4303         dprintk("%s: xdr returned %d!\n", __func__, -status);
4304         return status;
4305 }
4306
4307 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4308 {
4309         unsigned int savep;
4310         uint32_t attrlen, bitmap[3] = {0};
4311         int status;
4312
4313         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4314                 goto xdr_error;
4315         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4316                 goto xdr_error;
4317         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4318                 goto xdr_error;
4319
4320         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4321                 goto xdr_error;
4322         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4323                 goto xdr_error;
4324         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4325                 goto xdr_error;
4326         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4327                 goto xdr_error;
4328         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4329                 goto xdr_error;
4330         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4331                 goto xdr_error;
4332
4333         status = verify_attr_len(xdr, savep, attrlen);
4334 xdr_error:
4335         dprintk("%s: xdr returned %d!\n", __func__, -status);
4336         return status;
4337 }
4338
4339 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4340 {
4341         unsigned int savep;
4342         uint32_t attrlen, bitmap[3] = {0};
4343         int status;
4344
4345         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4346                 goto xdr_error;
4347         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4348                 goto xdr_error;
4349         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4350                 goto xdr_error;
4351
4352         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4353                 goto xdr_error;
4354         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4355                 goto xdr_error;
4356
4357         status = verify_attr_len(xdr, savep, attrlen);
4358 xdr_error:
4359         dprintk("%s: xdr returned %d!\n", __func__, -status);
4360         return status;
4361 }
4362
4363 static int decode_threshold_hint(struct xdr_stream *xdr,
4364                                   uint32_t *bitmap,
4365                                   uint64_t *res,
4366                                   uint32_t hint_bit)
4367 {
4368         __be32 *p;
4369
4370         *res = 0;
4371         if (likely(bitmap[0] & hint_bit)) {
4372                 p = xdr_inline_decode(xdr, 8);
4373                 if (unlikely(!p))
4374                         goto out_overflow;
4375                 xdr_decode_hyper(p, res);
4376         }
4377         return 0;
4378 out_overflow:
4379         print_overflow_msg(__func__, xdr);
4380         return -EIO;
4381 }
4382
4383 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4384                                         struct nfs4_threshold *res)
4385 {
4386         __be32 *p;
4387         unsigned int savep;
4388         uint32_t bitmap[3] = {0,}, attrlen;
4389         int status;
4390
4391         /* layout type */
4392         p = xdr_inline_decode(xdr, 4);
4393         if (unlikely(!p)) {
4394                 print_overflow_msg(__func__, xdr);
4395                 return -EIO;
4396         }
4397         res->l_type = be32_to_cpup(p);
4398
4399         /* thi_hintset bitmap */
4400         status = decode_attr_bitmap(xdr, bitmap);
4401         if (status < 0)
4402                 goto xdr_error;
4403
4404         /* thi_hintlist length */
4405         status = decode_attr_length(xdr, &attrlen, &savep);
4406         if (status < 0)
4407                 goto xdr_error;
4408         /* thi_hintlist */
4409         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4410         if (status < 0)
4411                 goto xdr_error;
4412         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4413         if (status < 0)
4414                 goto xdr_error;
4415         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4416                                        THRESHOLD_RD_IO);
4417         if (status < 0)
4418                 goto xdr_error;
4419         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4420                                        THRESHOLD_WR_IO);
4421         if (status < 0)
4422                 goto xdr_error;
4423
4424         status = verify_attr_len(xdr, savep, attrlen);
4425         res->bm = bitmap[0];
4426
4427         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4428                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4429                 res->wr_io_sz);
4430 xdr_error:
4431         dprintk("%s ret=%d!\n", __func__, status);
4432         return status;
4433 }
4434
4435 /*
4436  * Thresholds on pNFS direct I/O vrs MDS I/O
4437  */
4438 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4439                                     uint32_t *bitmap,
4440                                     struct nfs4_threshold *res)
4441 {
4442         __be32 *p;
4443         int status = 0;
4444         uint32_t num;
4445
4446         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4447                 return -EIO;
4448         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4449                 /* Did the server return an unrequested attribute? */
4450                 if (unlikely(res == NULL))
4451                         return -EREMOTEIO;
4452                 p = xdr_inline_decode(xdr, 4);
4453                 if (unlikely(!p))
4454                         goto out_overflow;
4455                 num = be32_to_cpup(p);
4456                 if (num == 0)
4457                         return 0;
4458                 if (num > 1)
4459                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4460                                 "drivers per filesystem not supported\n",
4461                                 __func__);
4462
4463                 status = decode_first_threshold_item4(xdr, res);
4464                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4465         }
4466         return status;
4467 out_overflow:
4468         print_overflow_msg(__func__, xdr);
4469         return -EIO;
4470 }
4471
4472 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4473                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4474                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4475                 const struct nfs_server *server)
4476 {
4477         int status;
4478         umode_t fmode = 0;
4479         uint32_t type;
4480         int32_t err;
4481
4482         status = decode_attr_type(xdr, bitmap, &type);
4483         if (status < 0)
4484                 goto xdr_error;
4485         fattr->mode = 0;
4486         if (status != 0) {
4487                 fattr->mode |= nfs_type2fmt[type];
4488                 fattr->valid |= status;
4489         }
4490
4491         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4492         if (status < 0)
4493                 goto xdr_error;
4494         fattr->valid |= status;
4495
4496         status = decode_attr_size(xdr, bitmap, &fattr->size);
4497         if (status < 0)
4498                 goto xdr_error;
4499         fattr->valid |= status;
4500
4501         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4502         if (status < 0)
4503                 goto xdr_error;
4504         fattr->valid |= status;
4505
4506         err = 0;
4507         status = decode_attr_error(xdr, bitmap, &err);
4508         if (status < 0)
4509                 goto xdr_error;
4510
4511         status = decode_attr_filehandle(xdr, bitmap, fh);
4512         if (status < 0)
4513                 goto xdr_error;
4514
4515         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4516         if (status < 0)
4517                 goto xdr_error;
4518         fattr->valid |= status;
4519
4520         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4521         if (status < 0)
4522                 goto xdr_error;
4523         fattr->valid |= status;
4524
4525         status = decode_attr_mode(xdr, bitmap, &fmode);
4526         if (status < 0)
4527                 goto xdr_error;
4528         if (status != 0) {
4529                 fattr->mode |= fmode;
4530                 fattr->valid |= status;
4531         }
4532
4533         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4534         if (status < 0)
4535                 goto xdr_error;
4536         fattr->valid |= status;
4537
4538         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4539         if (status < 0)
4540                 goto xdr_error;
4541         fattr->valid |= status;
4542
4543         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4544         if (status < 0)
4545                 goto xdr_error;
4546         fattr->valid |= status;
4547
4548         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4549         if (status < 0)
4550                 goto xdr_error;
4551         fattr->valid |= status;
4552
4553         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4554         if (status < 0)
4555                 goto xdr_error;
4556         fattr->valid |= status;
4557
4558         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4559         if (status < 0)
4560                 goto xdr_error;
4561         fattr->valid |= status;
4562
4563         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4564         if (status < 0)
4565                 goto xdr_error;
4566         fattr->valid |= status;
4567
4568         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4569         if (status < 0)
4570                 goto xdr_error;
4571         fattr->valid |= status;
4572
4573         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4574         if (status < 0)
4575                 goto xdr_error;
4576         fattr->valid |= status;
4577
4578         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4579         if (status < 0)
4580                 goto xdr_error;
4581
4582         if (label) {
4583                 status = decode_attr_security_label(xdr, bitmap, label);
4584                 if (status < 0)
4585                         goto xdr_error;
4586                 fattr->valid |= status;
4587         }
4588
4589 xdr_error:
4590         dprintk("%s: xdr returned %d\n", __func__, -status);
4591         return status;
4592 }
4593
4594 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4595                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4596                 struct nfs4_label *label, const struct nfs_server *server)
4597 {
4598         unsigned int savep;
4599         uint32_t attrlen,
4600                  bitmap[3] = {0};
4601         int status;
4602
4603         status = decode_op_hdr(xdr, OP_GETATTR);
4604         if (status < 0)
4605                 goto xdr_error;
4606
4607         status = decode_attr_bitmap(xdr, bitmap);
4608         if (status < 0)
4609                 goto xdr_error;
4610
4611         status = decode_attr_length(xdr, &attrlen, &savep);
4612         if (status < 0)
4613                 goto xdr_error;
4614
4615         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4616                                         label, server);
4617         if (status < 0)
4618                 goto xdr_error;
4619
4620         status = verify_attr_len(xdr, savep, attrlen);
4621 xdr_error:
4622         dprintk("%s: xdr returned %d\n", __func__, -status);
4623         return status;
4624 }
4625
4626 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4627                 struct nfs4_label *label, const struct nfs_server *server)
4628 {
4629         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4630 }
4631
4632 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4633                 const struct nfs_server *server)
4634 {
4635         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4636 }
4637
4638 /*
4639  * Decode potentially multiple layout types. Currently we only support
4640  * one layout driver per file system.
4641  */
4642 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4643                                          uint32_t *layouttype)
4644 {
4645         uint32_t *p;
4646         int num;
4647
4648         p = xdr_inline_decode(xdr, 4);
4649         if (unlikely(!p))
4650                 goto out_overflow;
4651         num = be32_to_cpup(p);
4652
4653         /* pNFS is not supported by the underlying file system */
4654         if (num == 0) {
4655                 *layouttype = 0;
4656                 return 0;
4657         }
4658         if (num > 1)
4659                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4660                         "drivers per filesystem not supported\n", __func__);
4661
4662         /* Decode and set first layout type, move xdr->p past unused types */
4663         p = xdr_inline_decode(xdr, num * 4);
4664         if (unlikely(!p))
4665                 goto out_overflow;
4666         *layouttype = be32_to_cpup(p);
4667         return 0;
4668 out_overflow:
4669         print_overflow_msg(__func__, xdr);
4670         return -EIO;
4671 }
4672
4673 /*
4674  * The type of file system exported.
4675  * Note we must ensure that layouttype is set in any non-error case.
4676  */
4677 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4678                                 uint32_t *layouttype)
4679 {
4680         int status = 0;
4681
4682         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4683         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4684                 return -EIO;
4685         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4686                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4687                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4688         } else
4689                 *layouttype = 0;
4690         return status;
4691 }
4692
4693 /*
4694  * The prefered block size for layout directed io
4695  */
4696 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4697                                       uint32_t *res)
4698 {
4699         __be32 *p;
4700
4701         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4702         *res = 0;
4703         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4704                 p = xdr_inline_decode(xdr, 4);
4705                 if (unlikely(!p)) {
4706                         print_overflow_msg(__func__, xdr);
4707                         return -EIO;
4708                 }
4709                 *res = be32_to_cpup(p);
4710                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4711         }
4712         return 0;
4713 }
4714
4715 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4716 {
4717         unsigned int savep;
4718         uint32_t attrlen, bitmap[3];
4719         int status;
4720
4721         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4722                 goto xdr_error;
4723         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4724                 goto xdr_error;
4725         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4726                 goto xdr_error;
4727
4728         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4729
4730         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4731                 goto xdr_error;
4732         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4733                 goto xdr_error;
4734         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4735                 goto xdr_error;
4736         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4737         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4738                 goto xdr_error;
4739         fsinfo->wtpref = fsinfo->wtmax;
4740         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4741         if (status != 0)
4742                 goto xdr_error;
4743         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4744         if (status != 0)
4745                 goto xdr_error;
4746         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4747         if (status)
4748                 goto xdr_error;
4749
4750         status = verify_attr_len(xdr, savep, attrlen);
4751 xdr_error:
4752         dprintk("%s: xdr returned %d!\n", __func__, -status);
4753         return status;
4754 }
4755
4756 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4757 {
4758         __be32 *p;
4759         uint32_t len;
4760         int status;
4761
4762         /* Zero handle first to allow comparisons */
4763         memset(fh, 0, sizeof(*fh));
4764
4765         status = decode_op_hdr(xdr, OP_GETFH);
4766         if (status)
4767                 return status;
4768
4769         p = xdr_inline_decode(xdr, 4);
4770         if (unlikely(!p))
4771                 goto out_overflow;
4772         len = be32_to_cpup(p);
4773         if (len > NFS4_FHSIZE)
4774                 return -EIO;
4775         fh->size = len;
4776         p = xdr_inline_decode(xdr, len);
4777         if (unlikely(!p))
4778                 goto out_overflow;
4779         memcpy(fh->data, p, len);
4780         return 0;
4781 out_overflow:
4782         print_overflow_msg(__func__, xdr);
4783         return -EIO;
4784 }
4785
4786 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4787 {
4788         int status;
4789
4790         status = decode_op_hdr(xdr, OP_LINK);
4791         if (status)
4792                 return status;
4793         return decode_change_info(xdr, cinfo);
4794 }
4795
4796 /*
4797  * We create the owner, so we know a proper owner.id length is 4.
4798  */
4799 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4800 {
4801         uint64_t offset, length, clientid;
4802         __be32 *p;
4803         uint32_t namelen, type;
4804
4805         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4806         if (unlikely(!p))
4807                 goto out_overflow;
4808         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4809         p = xdr_decode_hyper(p, &length);
4810         type = be32_to_cpup(p++); /* 4 byte read */
4811         if (fl != NULL) { /* manipulate file lock */
4812                 fl->fl_start = (loff_t)offset;
4813                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4814                 if (length == ~(uint64_t)0)
4815                         fl->fl_end = OFFSET_MAX;
4816                 fl->fl_type = F_WRLCK;
4817                 if (type & 1)
4818                         fl->fl_type = F_RDLCK;
4819                 fl->fl_pid = 0;
4820         }
4821         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4822         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4823         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4824         if (likely(p))
4825                 return -NFS4ERR_DENIED;
4826 out_overflow:
4827         print_overflow_msg(__func__, xdr);
4828         return -EIO;
4829 }
4830
4831 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4832 {
4833         int status;
4834
4835         status = decode_op_hdr(xdr, OP_LOCK);
4836         if (status == -EIO)
4837                 goto out;
4838         if (status == 0) {
4839                 status = decode_stateid(xdr, &res->stateid);
4840                 if (unlikely(status))
4841                         goto out;
4842         } else if (status == -NFS4ERR_DENIED)
4843                 status = decode_lock_denied(xdr, NULL);
4844         if (res->open_seqid != NULL)
4845                 nfs_increment_open_seqid(status, res->open_seqid);
4846         nfs_increment_lock_seqid(status, res->lock_seqid);
4847 out:
4848         return status;
4849 }
4850
4851 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4852 {
4853         int status;
4854         status = decode_op_hdr(xdr, OP_LOCKT);
4855         if (status == -NFS4ERR_DENIED)
4856                 return decode_lock_denied(xdr, res->denied);
4857         return status;
4858 }
4859
4860 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4861 {
4862         int status;
4863
4864         status = decode_op_hdr(xdr, OP_LOCKU);
4865         if (status != -EIO)
4866                 nfs_increment_lock_seqid(status, res->seqid);
4867         if (status == 0)
4868                 status = decode_stateid(xdr, &res->stateid);
4869         return status;
4870 }
4871
4872 static int decode_release_lockowner(struct xdr_stream *xdr)
4873 {
4874         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4875 }
4876
4877 static int decode_lookup(struct xdr_stream *xdr)
4878 {
4879         return decode_op_hdr(xdr, OP_LOOKUP);
4880 }
4881
4882 /* This is too sick! */
4883 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4884 {
4885         __be32 *p;
4886         uint32_t limit_type, nblocks, blocksize;
4887
4888         p = xdr_inline_decode(xdr, 12);
4889         if (unlikely(!p))
4890                 goto out_overflow;
4891         limit_type = be32_to_cpup(p++);
4892         switch (limit_type) {
4893         case 1:
4894                 xdr_decode_hyper(p, maxsize);
4895                 break;
4896         case 2:
4897                 nblocks = be32_to_cpup(p++);
4898                 blocksize = be32_to_cpup(p);
4899                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4900         }
4901         return 0;
4902 out_overflow:
4903         print_overflow_msg(__func__, xdr);
4904         return -EIO;
4905 }
4906
4907 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4908 {
4909         __be32 *p;
4910         uint32_t delegation_type;
4911         int status;
4912
4913         p = xdr_inline_decode(xdr, 4);
4914         if (unlikely(!p))
4915                 goto out_overflow;
4916         delegation_type = be32_to_cpup(p);
4917         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4918                 res->delegation_type = 0;
4919                 return 0;
4920         }
4921         status = decode_stateid(xdr, &res->delegation);
4922         if (unlikely(status))
4923                 return status;
4924         p = xdr_inline_decode(xdr, 4);
4925         if (unlikely(!p))
4926                 goto out_overflow;
4927         res->do_recall = be32_to_cpup(p);
4928
4929         switch (delegation_type) {
4930         case NFS4_OPEN_DELEGATE_READ:
4931                 res->delegation_type = FMODE_READ;
4932                 break;
4933         case NFS4_OPEN_DELEGATE_WRITE:
4934                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4935                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4936                                 return -EIO;
4937         }
4938         return decode_ace(xdr, NULL, res->server->nfs_client);
4939 out_overflow:
4940         print_overflow_msg(__func__, xdr);
4941         return -EIO;
4942 }
4943
4944 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4945 {
4946         __be32 *p;
4947         uint32_t savewords, bmlen, i;
4948         int status;
4949
4950         status = decode_op_hdr(xdr, OP_OPEN);
4951         if (status != -EIO)
4952                 nfs_increment_open_seqid(status, res->seqid);
4953         if (!status)
4954                 status = decode_stateid(xdr, &res->stateid);
4955         if (unlikely(status))
4956                 return status;
4957
4958         decode_change_info(xdr, &res->cinfo);
4959
4960         p = xdr_inline_decode(xdr, 8);
4961         if (unlikely(!p))
4962                 goto out_overflow;
4963         res->rflags = be32_to_cpup(p++);
4964         bmlen = be32_to_cpup(p);
4965         if (bmlen > 10)
4966                 goto xdr_error;
4967
4968         p = xdr_inline_decode(xdr, bmlen << 2);
4969         if (unlikely(!p))
4970                 goto out_overflow;
4971         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4972         for (i = 0; i < savewords; ++i)
4973                 res->attrset[i] = be32_to_cpup(p++);
4974         for (; i < NFS4_BITMAP_SIZE; i++)
4975                 res->attrset[i] = 0;
4976
4977         return decode_delegation(xdr, res);
4978 xdr_error:
4979         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4980         return -EIO;
4981 out_overflow:
4982         print_overflow_msg(__func__, xdr);
4983         return -EIO;
4984 }
4985
4986 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4987 {
4988         int status;
4989
4990         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4991         if (status != -EIO)
4992                 nfs_increment_open_seqid(status, res->seqid);
4993         if (!status)
4994                 status = decode_stateid(xdr, &res->stateid);
4995         return status;
4996 }
4997
4998 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4999 {
5000         int status;
5001
5002         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5003         if (status != -EIO)
5004                 nfs_increment_open_seqid(status, res->seqid);
5005         if (!status)
5006                 status = decode_stateid(xdr, &res->stateid);
5007         return status;
5008 }
5009
5010 static int decode_putfh(struct xdr_stream *xdr)
5011 {
5012         return decode_op_hdr(xdr, OP_PUTFH);
5013 }
5014
5015 static int decode_putrootfh(struct xdr_stream *xdr)
5016 {
5017         return decode_op_hdr(xdr, OP_PUTROOTFH);
5018 }
5019
5020 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
5021 {
5022         __be32 *p;
5023         uint32_t count, eof, recvd;
5024         int status;
5025
5026         status = decode_op_hdr(xdr, OP_READ);
5027         if (status)
5028                 return status;
5029         p = xdr_inline_decode(xdr, 8);
5030         if (unlikely(!p))
5031                 goto out_overflow;
5032         eof = be32_to_cpup(p++);
5033         count = be32_to_cpup(p);
5034         recvd = xdr_read_pages(xdr, count);
5035         if (count > recvd) {
5036                 dprintk("NFS: server cheating in read reply: "
5037                                 "count %u > recvd %u\n", count, recvd);
5038                 count = recvd;
5039                 eof = 0;
5040         }
5041         res->eof = eof;
5042         res->count = count;
5043         return 0;
5044 out_overflow:
5045         print_overflow_msg(__func__, xdr);
5046         return -EIO;
5047 }
5048
5049 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5050 {
5051         int             status;
5052         __be32          verf[2];
5053
5054         status = decode_op_hdr(xdr, OP_READDIR);
5055         if (!status)
5056                 status = decode_verifier(xdr, readdir->verifier.data);
5057         if (unlikely(status))
5058                 return status;
5059         memcpy(verf, readdir->verifier.data, sizeof(verf));
5060         dprintk("%s: verifier = %08x:%08x\n",
5061                         __func__, verf[0], verf[1]);
5062         return xdr_read_pages(xdr, xdr->buf->page_len);
5063 }
5064
5065 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5066 {
5067         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5068         u32 len, recvd;
5069         __be32 *p;
5070         int status;
5071
5072         status = decode_op_hdr(xdr, OP_READLINK);
5073         if (status)
5074                 return status;
5075
5076         /* Convert length of symlink */
5077         p = xdr_inline_decode(xdr, 4);
5078         if (unlikely(!p))
5079                 goto out_overflow;
5080         len = be32_to_cpup(p);
5081         if (len >= rcvbuf->page_len || len <= 0) {
5082                 dprintk("nfs: server returned giant symlink!\n");
5083                 return -ENAMETOOLONG;
5084         }
5085         recvd = xdr_read_pages(xdr, len);
5086         if (recvd < len) {
5087                 dprintk("NFS: server cheating in readlink reply: "
5088                                 "count %u > recvd %u\n", len, recvd);
5089                 return -EIO;
5090         }
5091         /*
5092          * The XDR encode routine has set things up so that
5093          * the link text will be copied directly into the
5094          * buffer.  We just have to do overflow-checking,
5095          * and and null-terminate the text (the VFS expects
5096          * null-termination).
5097          */
5098         xdr_terminate_string(rcvbuf, len);
5099         return 0;
5100 out_overflow:
5101         print_overflow_msg(__func__, xdr);
5102         return -EIO;
5103 }
5104
5105 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5106 {
5107         int status;
5108
5109         status = decode_op_hdr(xdr, OP_REMOVE);
5110         if (status)
5111                 goto out;
5112         status = decode_change_info(xdr, cinfo);
5113 out:
5114         return status;
5115 }
5116
5117 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5118               struct nfs4_change_info *new_cinfo)
5119 {
5120         int status;
5121
5122         status = decode_op_hdr(xdr, OP_RENAME);
5123         if (status)
5124                 goto out;
5125         if ((status = decode_change_info(xdr, old_cinfo)))
5126                 goto out;
5127         status = decode_change_info(xdr, new_cinfo);
5128 out:
5129         return status;
5130 }
5131
5132 static int decode_renew(struct xdr_stream *xdr)
5133 {
5134         return decode_op_hdr(xdr, OP_RENEW);
5135 }
5136
5137 static int
5138 decode_restorefh(struct xdr_stream *xdr)
5139 {
5140         return decode_op_hdr(xdr, OP_RESTOREFH);
5141 }
5142
5143 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5144                          struct nfs_getaclres *res)
5145 {
5146         unsigned int savep;
5147         uint32_t attrlen,
5148                  bitmap[3] = {0};
5149         int status;
5150         unsigned int pg_offset;
5151
5152         res->acl_len = 0;
5153         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5154                 goto out;
5155
5156         xdr_enter_page(xdr, xdr->buf->page_len);
5157
5158         /* Calculate the offset of the page data */
5159         pg_offset = xdr->buf->head[0].iov_len;
5160
5161         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5162                 goto out;
5163         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5164                 goto out;
5165
5166         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5167                 return -EIO;
5168         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5169
5170                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5171                  * are stored with the acl data to handle the problem of
5172                  * variable length bitmaps.*/
5173                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5174                 res->acl_len = attrlen;
5175
5176                 /* Check for receive buffer overflow */
5177                 if (res->acl_len > (xdr->nwords << 2) ||
5178                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5179                         res->acl_flags |= NFS4_ACL_TRUNC;
5180                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5181                                         attrlen, xdr->nwords << 2);
5182                 }
5183         } else
5184                 status = -EOPNOTSUPP;
5185
5186 out:
5187         return status;
5188 }
5189
5190 static int
5191 decode_savefh(struct xdr_stream *xdr)
5192 {
5193         return decode_op_hdr(xdr, OP_SAVEFH);
5194 }
5195
5196 static int decode_setattr(struct xdr_stream *xdr)
5197 {
5198         __be32 *p;
5199         uint32_t bmlen;
5200         int status;
5201
5202         status = decode_op_hdr(xdr, OP_SETATTR);
5203         if (status)
5204                 return status;
5205         p = xdr_inline_decode(xdr, 4);
5206         if (unlikely(!p))
5207                 goto out_overflow;
5208         bmlen = be32_to_cpup(p);
5209         p = xdr_inline_decode(xdr, bmlen << 2);
5210         if (likely(p))
5211                 return 0;
5212 out_overflow:
5213         print_overflow_msg(__func__, xdr);
5214         return -EIO;
5215 }
5216
5217 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5218 {
5219         __be32 *p;
5220         uint32_t opnum;
5221         int32_t nfserr;
5222
5223         p = xdr_inline_decode(xdr, 8);
5224         if (unlikely(!p))
5225                 goto out_overflow;
5226         opnum = be32_to_cpup(p++);
5227         if (opnum != OP_SETCLIENTID) {
5228                 dprintk("nfs: decode_setclientid: Server returned operation"
5229                         " %d\n", opnum);
5230                 return -EIO;
5231         }
5232         nfserr = be32_to_cpup(p);
5233         if (nfserr == NFS_OK) {
5234                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5235                 if (unlikely(!p))
5236                         goto out_overflow;
5237                 p = xdr_decode_hyper(p, &res->clientid);
5238                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5239         } else if (nfserr == NFSERR_CLID_INUSE) {
5240                 uint32_t len;
5241
5242                 /* skip netid string */
5243                 p = xdr_inline_decode(xdr, 4);
5244                 if (unlikely(!p))
5245                         goto out_overflow;
5246                 len = be32_to_cpup(p);
5247                 p = xdr_inline_decode(xdr, len);
5248                 if (unlikely(!p))
5249                         goto out_overflow;
5250
5251                 /* skip uaddr string */
5252                 p = xdr_inline_decode(xdr, 4);
5253                 if (unlikely(!p))
5254                         goto out_overflow;
5255                 len = be32_to_cpup(p);
5256                 p = xdr_inline_decode(xdr, len);
5257                 if (unlikely(!p))
5258                         goto out_overflow;
5259                 return -NFSERR_CLID_INUSE;
5260         } else
5261                 return nfs4_stat_to_errno(nfserr);
5262
5263         return 0;
5264 out_overflow:
5265         print_overflow_msg(__func__, xdr);
5266         return -EIO;
5267 }
5268
5269 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5270 {
5271         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5272 }
5273
5274 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5275 {
5276         __be32 *p;
5277         int status;
5278
5279         status = decode_op_hdr(xdr, OP_WRITE);
5280         if (status)
5281                 return status;
5282
5283         p = xdr_inline_decode(xdr, 8);
5284         if (unlikely(!p))
5285                 goto out_overflow;
5286         res->count = be32_to_cpup(p++);
5287         res->verf->committed = be32_to_cpup(p++);
5288         return decode_write_verifier(xdr, &res->verf->verifier);
5289 out_overflow:
5290         print_overflow_msg(__func__, xdr);
5291         return -EIO;
5292 }
5293
5294 static int decode_delegreturn(struct xdr_stream *xdr)
5295 {
5296         return decode_op_hdr(xdr, OP_DELEGRETURN);
5297 }
5298
5299 static int decode_secinfo_gss(struct xdr_stream *xdr,
5300                               struct nfs4_secinfo4 *flavor)
5301 {
5302         u32 oid_len;
5303         __be32 *p;
5304
5305         p = xdr_inline_decode(xdr, 4);
5306         if (unlikely(!p))
5307                 goto out_overflow;
5308         oid_len = be32_to_cpup(p);
5309         if (oid_len > GSS_OID_MAX_LEN)
5310                 goto out_err;
5311
5312         p = xdr_inline_decode(xdr, oid_len);
5313         if (unlikely(!p))
5314                 goto out_overflow;
5315         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5316         flavor->flavor_info.oid.len = oid_len;
5317
5318         p = xdr_inline_decode(xdr, 8);
5319         if (unlikely(!p))
5320                 goto out_overflow;
5321         flavor->flavor_info.qop = be32_to_cpup(p++);
5322         flavor->flavor_info.service = be32_to_cpup(p);
5323
5324         return 0;
5325
5326 out_overflow:
5327         print_overflow_msg(__func__, xdr);
5328         return -EIO;
5329 out_err:
5330         return -EINVAL;
5331 }
5332
5333 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5334 {
5335         struct nfs4_secinfo4 *sec_flavor;
5336         unsigned int i, num_flavors;
5337         int status;
5338         __be32 *p;
5339
5340         p = xdr_inline_decode(xdr, 4);
5341         if (unlikely(!p))
5342                 goto out_overflow;
5343
5344         res->flavors->num_flavors = 0;
5345         num_flavors = be32_to_cpup(p);
5346
5347         for (i = 0; i < num_flavors; i++) {
5348                 sec_flavor = &res->flavors->flavors[i];
5349                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5350                         break;
5351
5352                 p = xdr_inline_decode(xdr, 4);
5353                 if (unlikely(!p))
5354                         goto out_overflow;
5355                 sec_flavor->flavor = be32_to_cpup(p);
5356
5357                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5358                         status = decode_secinfo_gss(xdr, sec_flavor);
5359                         if (status)
5360                                 goto out;
5361                 }
5362                 res->flavors->num_flavors++;
5363         }
5364
5365         status = 0;
5366 out:
5367         return status;
5368 out_overflow:
5369         print_overflow_msg(__func__, xdr);
5370         return -EIO;
5371 }
5372
5373 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5374 {
5375         int status = decode_op_hdr(xdr, OP_SECINFO);
5376         if (status)
5377                 return status;
5378         return decode_secinfo_common(xdr, res);
5379 }
5380
5381 #if defined(CONFIG_NFS_V4_1)
5382 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5383 {
5384         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5385         if (status)
5386                 return status;
5387         return decode_secinfo_common(xdr, res);
5388 }
5389
5390 static int decode_exchange_id(struct xdr_stream *xdr,
5391                               struct nfs41_exchange_id_res *res)
5392 {
5393         __be32 *p;
5394         uint32_t dummy;
5395         char *dummy_str;
5396         int status;
5397         uint32_t impl_id_count;
5398
5399         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5400         if (status)
5401                 return status;
5402
5403         p = xdr_inline_decode(xdr, 8);
5404         if (unlikely(!p))
5405                 goto out_overflow;
5406         xdr_decode_hyper(p, &res->clientid);
5407         p = xdr_inline_decode(xdr, 12);
5408         if (unlikely(!p))
5409                 goto out_overflow;
5410         res->seqid = be32_to_cpup(p++);
5411         res->flags = be32_to_cpup(p++);
5412
5413         /* We ask for SP4_NONE */
5414         dummy = be32_to_cpup(p);
5415         if (dummy != SP4_NONE)
5416                 return -EIO;
5417
5418         /* server_owner4.so_minor_id */
5419         p = xdr_inline_decode(xdr, 8);
5420         if (unlikely(!p))
5421                 goto out_overflow;
5422         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5423
5424         /* server_owner4.so_major_id */
5425         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5426         if (unlikely(status))
5427                 return status;
5428         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5429                 return -EIO;
5430         memcpy(res->server_owner->major_id, dummy_str, dummy);
5431         res->server_owner->major_id_sz = dummy;
5432
5433         /* server_scope4 */
5434         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5435         if (unlikely(status))
5436                 return status;
5437         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5438                 return -EIO;
5439         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5440         res->server_scope->server_scope_sz = dummy;
5441
5442         /* Implementation Id */
5443         p = xdr_inline_decode(xdr, 4);
5444         if (unlikely(!p))
5445                 goto out_overflow;
5446         impl_id_count = be32_to_cpup(p++);
5447
5448         if (impl_id_count) {
5449                 /* nii_domain */
5450                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5451                 if (unlikely(status))
5452                         return status;
5453                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5454                         return -EIO;
5455                 memcpy(res->impl_id->domain, dummy_str, dummy);
5456
5457                 /* nii_name */
5458                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5459                 if (unlikely(status))
5460                         return status;
5461                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5462                         return -EIO;
5463                 memcpy(res->impl_id->name, dummy_str, dummy);
5464
5465                 /* nii_date */
5466                 p = xdr_inline_decode(xdr, 12);
5467                 if (unlikely(!p))
5468                         goto out_overflow;
5469                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5470                 res->impl_id->date.nseconds = be32_to_cpup(p);
5471
5472                 /* if there's more than one entry, ignore the rest */
5473         }
5474         return 0;
5475 out_overflow:
5476         print_overflow_msg(__func__, xdr);
5477         return -EIO;
5478 }
5479
5480 static int decode_chan_attrs(struct xdr_stream *xdr,
5481                              struct nfs4_channel_attrs *attrs)
5482 {
5483         __be32 *p;
5484         u32 nr_attrs, val;
5485
5486         p = xdr_inline_decode(xdr, 28);
5487         if (unlikely(!p))
5488                 goto out_overflow;
5489         val = be32_to_cpup(p++);        /* headerpadsz */
5490         if (val)
5491                 return -EINVAL;         /* no support for header padding yet */
5492         attrs->max_rqst_sz = be32_to_cpup(p++);
5493         attrs->max_resp_sz = be32_to_cpup(p++);
5494         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5495         attrs->max_ops = be32_to_cpup(p++);
5496         attrs->max_reqs = be32_to_cpup(p++);
5497         nr_attrs = be32_to_cpup(p);
5498         if (unlikely(nr_attrs > 1)) {
5499                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5500                         "count %u\n", __func__, nr_attrs);
5501                 return -EINVAL;
5502         }
5503         if (nr_attrs == 1) {
5504                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5505                 if (unlikely(!p))
5506                         goto out_overflow;
5507         }
5508         return 0;
5509 out_overflow:
5510         print_overflow_msg(__func__, xdr);
5511         return -EIO;
5512 }
5513
5514 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5515 {
5516         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5517 }
5518
5519 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5520                                 struct nfs41_bind_conn_to_session_res *res)
5521 {
5522         __be32 *p;
5523         int status;
5524
5525         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5526         if (!status)
5527                 status = decode_sessionid(xdr, &res->session->sess_id);
5528         if (unlikely(status))
5529                 return status;
5530
5531         /* dir flags, rdma mode bool */
5532         p = xdr_inline_decode(xdr, 8);
5533         if (unlikely(!p))
5534                 goto out_overflow;
5535
5536         res->dir = be32_to_cpup(p++);
5537         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5538                 return -EIO;
5539         if (be32_to_cpup(p) == 0)
5540                 res->use_conn_in_rdma_mode = false;
5541         else
5542                 res->use_conn_in_rdma_mode = true;
5543
5544         return 0;
5545 out_overflow:
5546         print_overflow_msg(__func__, xdr);
5547         return -EIO;
5548 }
5549
5550 static int decode_create_session(struct xdr_stream *xdr,
5551                                  struct nfs41_create_session_res *res)
5552 {
5553         __be32 *p;
5554         int status;
5555         struct nfs_client *clp = res->client;
5556         struct nfs4_session *session = clp->cl_session;
5557
5558         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5559         if (!status)
5560                 status = decode_sessionid(xdr, &session->sess_id);
5561         if (unlikely(status))
5562                 return status;
5563
5564         /* seqid, flags */
5565         p = xdr_inline_decode(xdr, 8);
5566         if (unlikely(!p))
5567                 goto out_overflow;
5568         clp->cl_seqid = be32_to_cpup(p++);
5569         session->flags = be32_to_cpup(p);
5570
5571         /* Channel attributes */
5572         status = decode_chan_attrs(xdr, &session->fc_attrs);
5573         if (!status)
5574                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5575         return status;
5576 out_overflow:
5577         print_overflow_msg(__func__, xdr);
5578         return -EIO;
5579 }
5580
5581 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5582 {
5583         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5584 }
5585
5586 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5587 {
5588         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5589 }
5590
5591 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5592 {
5593         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5594 }
5595 #endif /* CONFIG_NFS_V4_1 */
5596
5597 static int decode_sequence(struct xdr_stream *xdr,
5598                            struct nfs4_sequence_res *res,
5599                            struct rpc_rqst *rqstp)
5600 {
5601 #if defined(CONFIG_NFS_V4_1)
5602         struct nfs4_session *session;
5603         struct nfs4_sessionid id;
5604         u32 dummy;
5605         int status;
5606         __be32 *p;
5607
5608         if (res->sr_slot == NULL)
5609                 return 0;
5610
5611         status = decode_op_hdr(xdr, OP_SEQUENCE);
5612         if (!status)
5613                 status = decode_sessionid(xdr, &id);
5614         if (unlikely(status))
5615                 goto out_err;
5616
5617         /*
5618          * If the server returns different values for sessionID, slotID or
5619          * sequence number, the server is looney tunes.
5620          */
5621         status = -EREMOTEIO;
5622         session = res->sr_slot->table->session;
5623
5624         if (memcmp(id.data, session->sess_id.data,
5625                    NFS4_MAX_SESSIONID_LEN)) {
5626                 dprintk("%s Invalid session id\n", __func__);
5627                 goto out_err;
5628         }
5629
5630         p = xdr_inline_decode(xdr, 20);
5631         if (unlikely(!p))
5632                 goto out_overflow;
5633
5634         /* seqid */
5635         dummy = be32_to_cpup(p++);
5636         if (dummy != res->sr_slot->seq_nr) {
5637                 dprintk("%s Invalid sequence number\n", __func__);
5638                 goto out_err;
5639         }
5640         /* slot id */
5641         dummy = be32_to_cpup(p++);
5642         if (dummy != res->sr_slot->slot_nr) {
5643                 dprintk("%s Invalid slot id\n", __func__);
5644                 goto out_err;
5645         }
5646         /* highest slot id */
5647         res->sr_highest_slotid = be32_to_cpup(p++);
5648         /* target highest slot id */
5649         res->sr_target_highest_slotid = be32_to_cpup(p++);
5650         /* result flags */
5651         res->sr_status_flags = be32_to_cpup(p);
5652         status = 0;
5653 out_err:
5654         res->sr_status = status;
5655         return status;
5656 out_overflow:
5657         print_overflow_msg(__func__, xdr);
5658         status = -EIO;
5659         goto out_err;
5660 #else  /* CONFIG_NFS_V4_1 */
5661         return 0;
5662 #endif /* CONFIG_NFS_V4_1 */
5663 }
5664
5665 #if defined(CONFIG_NFS_V4_1)
5666 /*
5667  * TODO: Need to handle case when EOF != true;
5668  */
5669 static int decode_getdevicelist(struct xdr_stream *xdr,
5670                                 struct pnfs_devicelist *res)
5671 {
5672         __be32 *p;
5673         int status, i;
5674         nfs4_verifier verftemp;
5675
5676         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5677         if (status)
5678                 return status;
5679
5680         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5681         if (unlikely(!p))
5682                 goto out_overflow;
5683
5684         /* TODO: Skip cookie for now */
5685         p += 2;
5686
5687         /* Read verifier */
5688         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5689
5690         res->num_devs = be32_to_cpup(p);
5691
5692         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5693
5694         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5695                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5696                                 __func__, res->num_devs);
5697                 return -EIO;
5698         }
5699
5700         p = xdr_inline_decode(xdr,
5701                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5702         if (unlikely(!p))
5703                 goto out_overflow;
5704         for (i = 0; i < res->num_devs; i++)
5705                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5706                                             NFS4_DEVICEID4_SIZE);
5707         res->eof = be32_to_cpup(p);
5708         return 0;
5709 out_overflow:
5710         print_overflow_msg(__func__, xdr);
5711         return -EIO;
5712 }
5713
5714 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5715                                 struct pnfs_device *pdev)
5716 {
5717         __be32 *p;
5718         uint32_t len, type;
5719         int status;
5720
5721         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5722         if (status) {
5723                 if (status == -ETOOSMALL) {
5724                         p = xdr_inline_decode(xdr, 4);
5725                         if (unlikely(!p))
5726                                 goto out_overflow;
5727                         pdev->mincount = be32_to_cpup(p);
5728                         dprintk("%s: Min count too small. mincnt = %u\n",
5729                                 __func__, pdev->mincount);
5730                 }
5731                 return status;
5732         }
5733
5734         p = xdr_inline_decode(xdr, 8);
5735         if (unlikely(!p))
5736                 goto out_overflow;
5737         type = be32_to_cpup(p++);
5738         if (type != pdev->layout_type) {
5739                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5740                         __func__, pdev->layout_type, type);
5741                 return -EINVAL;
5742         }
5743         /*
5744          * Get the length of the opaque device_addr4. xdr_read_pages places
5745          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5746          * and places the remaining xdr data in xdr_buf->tail
5747          */
5748         pdev->mincount = be32_to_cpup(p);
5749         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5750                 goto out_overflow;
5751
5752         /* Parse notification bitmap, verifying that it is zero. */
5753         p = xdr_inline_decode(xdr, 4);
5754         if (unlikely(!p))
5755                 goto out_overflow;
5756         len = be32_to_cpup(p);
5757         if (len) {
5758                 uint32_t i;
5759
5760                 p = xdr_inline_decode(xdr, 4 * len);
5761                 if (unlikely(!p))
5762                         goto out_overflow;
5763                 for (i = 0; i < len; i++, p++) {
5764                         if (be32_to_cpup(p)) {
5765                                 dprintk("%s: notifications not supported\n",
5766                                         __func__);
5767                                 return -EIO;
5768                         }
5769                 }
5770         }
5771         return 0;
5772 out_overflow:
5773         print_overflow_msg(__func__, xdr);
5774         return -EIO;
5775 }
5776
5777 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5778                             struct nfs4_layoutget_res *res)
5779 {
5780         __be32 *p;
5781         int status;
5782         u32 layout_count;
5783         u32 recvd;
5784
5785         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5786         if (status)
5787                 return status;
5788         p = xdr_inline_decode(xdr, 4);
5789         if (unlikely(!p))
5790                 goto out_overflow;
5791         res->return_on_close = be32_to_cpup(p);
5792         decode_stateid(xdr, &res->stateid);
5793         p = xdr_inline_decode(xdr, 4);
5794         if (unlikely(!p))
5795                 goto out_overflow;
5796         layout_count = be32_to_cpup(p);
5797         if (!layout_count) {
5798                 dprintk("%s: server responded with empty layout array\n",
5799                         __func__);
5800                 return -EINVAL;
5801         }
5802
5803         p = xdr_inline_decode(xdr, 28);
5804         if (unlikely(!p))
5805                 goto out_overflow;
5806         p = xdr_decode_hyper(p, &res->range.offset);
5807         p = xdr_decode_hyper(p, &res->range.length);
5808         res->range.iomode = be32_to_cpup(p++);
5809         res->type = be32_to_cpup(p++);
5810         res->layoutp->len = be32_to_cpup(p);
5811
5812         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5813                 __func__,
5814                 (unsigned long)res->range.offset,
5815                 (unsigned long)res->range.length,
5816                 res->range.iomode,
5817                 res->type,
5818                 res->layoutp->len);
5819
5820         recvd = xdr_read_pages(xdr, res->layoutp->len);
5821         if (res->layoutp->len > recvd) {
5822                 dprintk("NFS: server cheating in layoutget reply: "
5823                                 "layout len %u > recvd %u\n",
5824                                 res->layoutp->len, recvd);
5825                 return -EINVAL;
5826         }
5827
5828         if (layout_count > 1) {
5829                 /* We only handle a length one array at the moment.  Any
5830                  * further entries are just ignored.  Note that this means
5831                  * the client may see a response that is less than the
5832                  * minimum it requested.
5833                  */
5834                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5835                         __func__, layout_count);
5836         }
5837
5838         return 0;
5839 out_overflow:
5840         print_overflow_msg(__func__, xdr);
5841         return -EIO;
5842 }
5843
5844 static int decode_layoutreturn(struct xdr_stream *xdr,
5845                                struct nfs4_layoutreturn_res *res)
5846 {
5847         __be32 *p;
5848         int status;
5849
5850         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5851         if (status)
5852                 return status;
5853         p = xdr_inline_decode(xdr, 4);
5854         if (unlikely(!p))
5855                 goto out_overflow;
5856         res->lrs_present = be32_to_cpup(p);
5857         if (res->lrs_present)
5858                 status = decode_stateid(xdr, &res->stateid);
5859         return status;
5860 out_overflow:
5861         print_overflow_msg(__func__, xdr);
5862         return -EIO;
5863 }
5864
5865 static int decode_layoutcommit(struct xdr_stream *xdr,
5866                                struct rpc_rqst *req,
5867                                struct nfs4_layoutcommit_res *res)
5868 {
5869         __be32 *p;
5870         __u32 sizechanged;
5871         int status;
5872
5873         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5874         res->status = status;
5875         if (status)
5876                 return status;
5877
5878         p = xdr_inline_decode(xdr, 4);
5879         if (unlikely(!p))
5880                 goto out_overflow;
5881         sizechanged = be32_to_cpup(p);
5882
5883         if (sizechanged) {
5884                 /* throw away new size */
5885                 p = xdr_inline_decode(xdr, 8);
5886                 if (unlikely(!p))
5887                         goto out_overflow;
5888         }
5889         return 0;
5890 out_overflow:
5891         print_overflow_msg(__func__, xdr);
5892         return -EIO;
5893 }
5894
5895 static int decode_test_stateid(struct xdr_stream *xdr,
5896                                struct nfs41_test_stateid_res *res)
5897 {
5898         __be32 *p;
5899         int status;
5900         int num_res;
5901
5902         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5903         if (status)
5904                 return status;
5905
5906         p = xdr_inline_decode(xdr, 4);
5907         if (unlikely(!p))
5908                 goto out_overflow;
5909         num_res = be32_to_cpup(p++);
5910         if (num_res != 1)
5911                 goto out;
5912
5913         p = xdr_inline_decode(xdr, 4);
5914         if (unlikely(!p))
5915                 goto out_overflow;
5916         res->status = be32_to_cpup(p++);
5917
5918         return status;
5919 out_overflow:
5920         print_overflow_msg(__func__, xdr);
5921 out:
5922         return -EIO;
5923 }
5924
5925 static int decode_free_stateid(struct xdr_stream *xdr,
5926                                struct nfs41_free_stateid_res *res)
5927 {
5928         __be32 *p;
5929         int status;
5930
5931         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5932         if (status)
5933                 return status;
5934
5935         p = xdr_inline_decode(xdr, 4);
5936         if (unlikely(!p))
5937                 goto out_overflow;
5938         res->status = be32_to_cpup(p++);
5939         return res->status;
5940 out_overflow:
5941         print_overflow_msg(__func__, xdr);
5942         return -EIO;
5943 }
5944 #endif /* CONFIG_NFS_V4_1 */
5945
5946 /*
5947  * END OF "GENERIC" DECODE ROUTINES.
5948  */
5949
5950 /*
5951  * Decode OPEN_DOWNGRADE response
5952  */
5953 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5954                                        struct xdr_stream *xdr,
5955                                        struct nfs_closeres *res)
5956 {
5957         struct compound_hdr hdr;
5958         int status;
5959
5960         status = decode_compound_hdr(xdr, &hdr);
5961         if (status)
5962                 goto out;
5963         status = decode_sequence(xdr, &res->seq_res, rqstp);
5964         if (status)
5965                 goto out;
5966         status = decode_putfh(xdr);
5967         if (status)
5968                 goto out;
5969         status = decode_open_downgrade(xdr, res);
5970         if (status != 0)
5971                 goto out;
5972         decode_getfattr(xdr, res->fattr, res->server);
5973 out:
5974         return status;
5975 }
5976
5977 /*
5978  * Decode ACCESS response
5979  */
5980 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5981                                struct nfs4_accessres *res)
5982 {
5983         struct compound_hdr hdr;
5984         int status;
5985
5986         status = decode_compound_hdr(xdr, &hdr);
5987         if (status)
5988                 goto out;
5989         status = decode_sequence(xdr, &res->seq_res, rqstp);
5990         if (status)
5991                 goto out;
5992         status = decode_putfh(xdr);
5993         if (status != 0)
5994                 goto out;
5995         status = decode_access(xdr, &res->supported, &res->access);
5996         if (status != 0)
5997                 goto out;
5998         decode_getfattr(xdr, res->fattr, res->server);
5999 out:
6000         return status;
6001 }
6002
6003 /*
6004  * Decode LOOKUP response
6005  */
6006 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6007                                struct nfs4_lookup_res *res)
6008 {
6009         struct compound_hdr hdr;
6010         int status;
6011
6012         status = decode_compound_hdr(xdr, &hdr);
6013         if (status)
6014                 goto out;
6015         status = decode_sequence(xdr, &res->seq_res, rqstp);
6016         if (status)
6017                 goto out;
6018         status = decode_putfh(xdr);
6019         if (status)
6020                 goto out;
6021         status = decode_lookup(xdr);
6022         if (status)
6023                 goto out;
6024         status = decode_getfh(xdr, res->fh);
6025         if (status)
6026                 goto out;
6027         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6028 out:
6029         return status;
6030 }
6031
6032 /*
6033  * Decode LOOKUP_ROOT response
6034  */
6035 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6036                                     struct xdr_stream *xdr,
6037                                     struct nfs4_lookup_res *res)
6038 {
6039         struct compound_hdr hdr;
6040         int status;
6041
6042         status = decode_compound_hdr(xdr, &hdr);
6043         if (status)
6044                 goto out;
6045         status = decode_sequence(xdr, &res->seq_res, rqstp);
6046         if (status)
6047                 goto out;
6048         status = decode_putrootfh(xdr);
6049         if (status)
6050                 goto out;
6051         status = decode_getfh(xdr, res->fh);
6052         if (status == 0)
6053                 status = decode_getfattr_label(xdr, res->fattr,
6054                                                 res->label, res->server);
6055 out:
6056         return status;
6057 }
6058
6059 /*
6060  * Decode REMOVE response
6061  */
6062 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6063                                struct nfs_removeres *res)
6064 {
6065         struct compound_hdr hdr;
6066         int status;
6067
6068         status = decode_compound_hdr(xdr, &hdr);
6069         if (status)
6070                 goto out;
6071         status = decode_sequence(xdr, &res->seq_res, rqstp);
6072         if (status)
6073                 goto out;
6074         status = decode_putfh(xdr);
6075         if (status)
6076                 goto out;
6077         status = decode_remove(xdr, &res->cinfo);
6078 out:
6079         return status;
6080 }
6081
6082 /*
6083  * Decode RENAME response
6084  */
6085 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6086                                struct nfs_renameres *res)
6087 {
6088         struct compound_hdr hdr;
6089         int status;
6090
6091         status = decode_compound_hdr(xdr, &hdr);
6092         if (status)
6093                 goto out;
6094         status = decode_sequence(xdr, &res->seq_res, rqstp);
6095         if (status)
6096                 goto out;
6097         status = decode_putfh(xdr);
6098         if (status)
6099                 goto out;
6100         status = decode_savefh(xdr);
6101         if (status)
6102                 goto out;
6103         status = decode_putfh(xdr);
6104         if (status)
6105                 goto out;
6106         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6107 out:
6108         return status;
6109 }
6110
6111 /*
6112  * Decode LINK response
6113  */
6114 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6115                              struct nfs4_link_res *res)
6116 {
6117         struct compound_hdr hdr;
6118         int status;
6119
6120         status = decode_compound_hdr(xdr, &hdr);
6121         if (status)
6122                 goto out;
6123         status = decode_sequence(xdr, &res->seq_res, rqstp);
6124         if (status)
6125                 goto out;
6126         status = decode_putfh(xdr);
6127         if (status)
6128                 goto out;
6129         status = decode_savefh(xdr);
6130         if (status)
6131                 goto out;
6132         status = decode_putfh(xdr);
6133         if (status)
6134                 goto out;
6135         status = decode_link(xdr, &res->cinfo);
6136         if (status)
6137                 goto out;
6138         /*
6139          * Note order: OP_LINK leaves the directory as the current
6140          *             filehandle.
6141          */
6142         status = decode_restorefh(xdr);
6143         if (status)
6144                 goto out;
6145         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6146 out:
6147         return status;
6148 }
6149
6150 /*
6151  * Decode CREATE response
6152  */
6153 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6154                                struct nfs4_create_res *res)
6155 {
6156         struct compound_hdr hdr;
6157         int status;
6158
6159         status = decode_compound_hdr(xdr, &hdr);
6160         if (status)
6161                 goto out;
6162         status = decode_sequence(xdr, &res->seq_res, rqstp);
6163         if (status)
6164                 goto out;
6165         status = decode_putfh(xdr);
6166         if (status)
6167                 goto out;
6168         status = decode_create(xdr, &res->dir_cinfo);
6169         if (status)
6170                 goto out;
6171         status = decode_getfh(xdr, res->fh);
6172         if (status)
6173                 goto out;
6174         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6175 out:
6176         return status;
6177 }
6178
6179 /*
6180  * Decode SYMLINK response
6181  */
6182 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6183                                 struct nfs4_create_res *res)
6184 {
6185         return nfs4_xdr_dec_create(rqstp, xdr, res);
6186 }
6187
6188 /*
6189  * Decode GETATTR response
6190  */
6191 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6192                                 struct nfs4_getattr_res *res)
6193 {
6194         struct compound_hdr hdr;
6195         int status;
6196
6197         status = decode_compound_hdr(xdr, &hdr);
6198         if (status)
6199                 goto out;
6200         status = decode_sequence(xdr, &res->seq_res, rqstp);
6201         if (status)
6202                 goto out;
6203         status = decode_putfh(xdr);
6204         if (status)
6205                 goto out;
6206         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6207 out:
6208         return status;
6209 }
6210
6211 /*
6212  * Encode an SETACL request
6213  */
6214 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6215                                 struct nfs_setaclargs *args)
6216 {
6217         struct compound_hdr hdr = {
6218                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6219         };
6220
6221         encode_compound_hdr(xdr, req, &hdr);
6222         encode_sequence(xdr, &args->seq_args, &hdr);
6223         encode_putfh(xdr, args->fh, &hdr);
6224         encode_setacl(xdr, args, &hdr);
6225         encode_nops(&hdr);
6226 }
6227
6228 /*
6229  * Decode SETACL response
6230  */
6231 static int
6232 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6233                     struct nfs_setaclres *res)
6234 {
6235         struct compound_hdr hdr;
6236         int status;
6237
6238         status = decode_compound_hdr(xdr, &hdr);
6239         if (status)
6240                 goto out;
6241         status = decode_sequence(xdr, &res->seq_res, rqstp);
6242         if (status)
6243                 goto out;
6244         status = decode_putfh(xdr);
6245         if (status)
6246                 goto out;
6247         status = decode_setattr(xdr);
6248 out:
6249         return status;
6250 }
6251
6252 /*
6253  * Decode GETACL response
6254  */
6255 static int
6256 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6257                     struct nfs_getaclres *res)
6258 {
6259         struct compound_hdr hdr;
6260         int status;
6261
6262         if (res->acl_scratch != NULL) {
6263                 void *p = page_address(res->acl_scratch);
6264                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6265         }
6266         status = decode_compound_hdr(xdr, &hdr);
6267         if (status)
6268                 goto out;
6269         status = decode_sequence(xdr, &res->seq_res, rqstp);
6270         if (status)
6271                 goto out;
6272         status = decode_putfh(xdr);
6273         if (status)
6274                 goto out;
6275         status = decode_getacl(xdr, rqstp, res);
6276
6277 out:
6278         return status;
6279 }
6280
6281 /*
6282  * Decode CLOSE response
6283  */
6284 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6285                               struct nfs_closeres *res)
6286 {
6287         struct compound_hdr hdr;
6288         int status;
6289
6290         status = decode_compound_hdr(xdr, &hdr);
6291         if (status)
6292                 goto out;
6293         status = decode_sequence(xdr, &res->seq_res, rqstp);
6294         if (status)
6295                 goto out;
6296         status = decode_putfh(xdr);
6297         if (status)
6298                 goto out;
6299         status = decode_close(xdr, res);
6300         if (status != 0)
6301                 goto out;
6302         /*
6303          * Note: Server may do delete on close for this file
6304          *      in which case the getattr call will fail with
6305          *      an ESTALE error. Shouldn't be a problem,
6306          *      though, since fattr->valid will remain unset.
6307          */
6308         decode_getfattr(xdr, res->fattr, res->server);
6309 out:
6310         return status;
6311 }
6312
6313 /*
6314  * Decode OPEN response
6315  */
6316 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6317                              struct nfs_openres *res)
6318 {
6319         struct compound_hdr hdr;
6320         int status;
6321
6322         status = decode_compound_hdr(xdr, &hdr);
6323         if (status)
6324                 goto out;
6325         status = decode_sequence(xdr, &res->seq_res, rqstp);
6326         if (status)
6327                 goto out;
6328         status = decode_putfh(xdr);
6329         if (status)
6330                 goto out;
6331         status = decode_open(xdr, res);
6332         if (status)
6333                 goto out;
6334         status = decode_getfh(xdr, &res->fh);
6335         if (status)
6336                 goto out;
6337         if (res->access_request)
6338                 decode_access(xdr, &res->access_supported, &res->access_result);
6339         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6340 out:
6341         return status;
6342 }
6343
6344 /*
6345  * Decode OPEN_CONFIRM response
6346  */
6347 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6348                                      struct xdr_stream *xdr,
6349                                      struct nfs_open_confirmres *res)
6350 {
6351         struct compound_hdr hdr;
6352         int status;
6353
6354         status = decode_compound_hdr(xdr, &hdr);
6355         if (status)
6356                 goto out;
6357         status = decode_putfh(xdr);
6358         if (status)
6359                 goto out;
6360         status = decode_open_confirm(xdr, res);
6361 out:
6362         return status;
6363 }
6364
6365 /*
6366  * Decode OPEN response
6367  */
6368 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6369                                     struct xdr_stream *xdr,
6370                                     struct nfs_openres *res)
6371 {
6372         struct compound_hdr hdr;
6373         int status;
6374
6375         status = decode_compound_hdr(xdr, &hdr);
6376         if (status)
6377                 goto out;
6378         status = decode_sequence(xdr, &res->seq_res, rqstp);
6379         if (status)
6380                 goto out;
6381         status = decode_putfh(xdr);
6382         if (status)
6383                 goto out;
6384         status = decode_open(xdr, res);
6385         if (status)
6386                 goto out;
6387         if (res->access_request)
6388                 decode_access(xdr, &res->access_supported, &res->access_result);
6389         decode_getfattr(xdr, res->f_attr, res->server);
6390 out:
6391         return status;
6392 }
6393
6394 /*
6395  * Decode SETATTR response
6396  */
6397 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6398                                 struct xdr_stream *xdr,
6399                                 struct nfs_setattrres *res)
6400 {
6401         struct compound_hdr hdr;
6402         int status;
6403
6404         status = decode_compound_hdr(xdr, &hdr);
6405         if (status)
6406                 goto out;
6407         status = decode_sequence(xdr, &res->seq_res, rqstp);
6408         if (status)
6409                 goto out;
6410         status = decode_putfh(xdr);
6411         if (status)
6412                 goto out;
6413         status = decode_setattr(xdr);
6414         if (status)
6415                 goto out;
6416         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6417 out:
6418         return status;
6419 }
6420
6421 /*
6422  * Decode LOCK response
6423  */
6424 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6425                              struct nfs_lock_res *res)
6426 {
6427         struct compound_hdr hdr;
6428         int status;
6429
6430         status = decode_compound_hdr(xdr, &hdr);
6431         if (status)
6432                 goto out;
6433         status = decode_sequence(xdr, &res->seq_res, rqstp);
6434         if (status)
6435                 goto out;
6436         status = decode_putfh(xdr);
6437         if (status)
6438                 goto out;
6439         status = decode_lock(xdr, res);
6440 out:
6441         return status;
6442 }
6443
6444 /*
6445  * Decode LOCKT response
6446  */
6447 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6448                               struct nfs_lockt_res *res)
6449 {
6450         struct compound_hdr hdr;
6451         int status;
6452
6453         status = decode_compound_hdr(xdr, &hdr);
6454         if (status)
6455                 goto out;
6456         status = decode_sequence(xdr, &res->seq_res, rqstp);
6457         if (status)
6458                 goto out;
6459         status = decode_putfh(xdr);
6460         if (status)
6461                 goto out;
6462         status = decode_lockt(xdr, res);
6463 out:
6464         return status;
6465 }
6466
6467 /*
6468  * Decode LOCKU response
6469  */
6470 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6471                               struct nfs_locku_res *res)
6472 {
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_locku(xdr, res);
6486 out:
6487         return status;
6488 }
6489
6490 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6491                                           struct xdr_stream *xdr, void *dummy)
6492 {
6493         struct compound_hdr hdr;
6494         int status;
6495
6496         status = decode_compound_hdr(xdr, &hdr);
6497         if (!status)
6498                 status = decode_release_lockowner(xdr);
6499         return status;
6500 }
6501
6502 /*
6503  * Decode READLINK response
6504  */
6505 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6506                                  struct xdr_stream *xdr,
6507                                  struct nfs4_readlink_res *res)
6508 {
6509         struct compound_hdr hdr;
6510         int status;
6511
6512         status = decode_compound_hdr(xdr, &hdr);
6513         if (status)
6514                 goto out;
6515         status = decode_sequence(xdr, &res->seq_res, rqstp);
6516         if (status)
6517                 goto out;
6518         status = decode_putfh(xdr);
6519         if (status)
6520                 goto out;
6521         status = decode_readlink(xdr, rqstp);
6522 out:
6523         return status;
6524 }
6525
6526 /*
6527  * Decode READDIR response
6528  */
6529 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6530                                 struct nfs4_readdir_res *res)
6531 {
6532         struct compound_hdr hdr;
6533         int status;
6534
6535         status = decode_compound_hdr(xdr, &hdr);
6536         if (status)
6537                 goto out;
6538         status = decode_sequence(xdr, &res->seq_res, rqstp);
6539         if (status)
6540                 goto out;
6541         status = decode_putfh(xdr);
6542         if (status)
6543                 goto out;
6544         status = decode_readdir(xdr, rqstp, res);
6545 out:
6546         return status;
6547 }
6548
6549 /*
6550  * Decode Read response
6551  */
6552 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6553                              struct nfs_readres *res)
6554 {
6555         struct compound_hdr hdr;
6556         int status;
6557
6558         status = decode_compound_hdr(xdr, &hdr);
6559         if (status)
6560                 goto out;
6561         status = decode_sequence(xdr, &res->seq_res, rqstp);
6562         if (status)
6563                 goto out;
6564         status = decode_putfh(xdr);
6565         if (status)
6566                 goto out;
6567         status = decode_read(xdr, rqstp, res);
6568         if (!status)
6569                 status = res->count;
6570 out:
6571         return status;
6572 }
6573
6574 /*
6575  * Decode WRITE response
6576  */
6577 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6578                               struct nfs_writeres *res)
6579 {
6580         struct compound_hdr hdr;
6581         int status;
6582
6583         status = decode_compound_hdr(xdr, &hdr);
6584         if (status)
6585                 goto out;
6586         status = decode_sequence(xdr, &res->seq_res, rqstp);
6587         if (status)
6588                 goto out;
6589         status = decode_putfh(xdr);
6590         if (status)
6591                 goto out;
6592         status = decode_write(xdr, res);
6593         if (status)
6594                 goto out;
6595         if (res->fattr)
6596                 decode_getfattr(xdr, res->fattr, res->server);
6597         if (!status)
6598                 status = res->count;
6599 out:
6600         return status;
6601 }
6602
6603 /*
6604  * Decode COMMIT response
6605  */
6606 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6607                                struct nfs_commitres *res)
6608 {
6609         struct compound_hdr hdr;
6610         int status;
6611
6612         status = decode_compound_hdr(xdr, &hdr);
6613         if (status)
6614                 goto out;
6615         status = decode_sequence(xdr, &res->seq_res, rqstp);
6616         if (status)
6617                 goto out;
6618         status = decode_putfh(xdr);
6619         if (status)
6620                 goto out;
6621         status = decode_commit(xdr, res);
6622 out:
6623         return status;
6624 }
6625
6626 /*
6627  * Decode FSINFO response
6628  */
6629 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6630                                struct nfs4_fsinfo_res *res)
6631 {
6632         struct compound_hdr hdr;
6633         int status;
6634
6635         status = decode_compound_hdr(xdr, &hdr);
6636         if (!status)
6637                 status = decode_sequence(xdr, &res->seq_res, req);
6638         if (!status)
6639                 status = decode_putfh(xdr);
6640         if (!status)
6641                 status = decode_fsinfo(xdr, res->fsinfo);
6642         return status;
6643 }
6644
6645 /*
6646  * Decode PATHCONF response
6647  */
6648 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6649                                  struct nfs4_pathconf_res *res)
6650 {
6651         struct compound_hdr hdr;
6652         int status;
6653
6654         status = decode_compound_hdr(xdr, &hdr);
6655         if (!status)
6656                 status = decode_sequence(xdr, &res->seq_res, req);
6657         if (!status)
6658                 status = decode_putfh(xdr);
6659         if (!status)
6660                 status = decode_pathconf(xdr, res->pathconf);
6661         return status;
6662 }
6663
6664 /*
6665  * Decode STATFS response
6666  */
6667 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6668                                struct nfs4_statfs_res *res)
6669 {
6670         struct compound_hdr hdr;
6671         int status;
6672
6673         status = decode_compound_hdr(xdr, &hdr);
6674         if (!status)
6675                 status = decode_sequence(xdr, &res->seq_res, req);
6676         if (!status)
6677                 status = decode_putfh(xdr);
6678         if (!status)
6679                 status = decode_statfs(xdr, res->fsstat);
6680         return status;
6681 }
6682
6683 /*
6684  * Decode GETATTR_BITMAP response
6685  */
6686 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6687                                     struct xdr_stream *xdr,
6688                                     struct nfs4_server_caps_res *res)
6689 {
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, req);
6697         if (status)
6698                 goto out;
6699         status = decode_putfh(xdr);
6700         if (status)
6701                 goto out;
6702         status = decode_server_caps(xdr, res);
6703 out:
6704         return status;
6705 }
6706
6707 /*
6708  * Decode RENEW response
6709  */
6710 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6711                               void *__unused)
6712 {
6713         struct compound_hdr hdr;
6714         int status;
6715
6716         status = decode_compound_hdr(xdr, &hdr);
6717         if (!status)
6718                 status = decode_renew(xdr);
6719         return status;
6720 }
6721
6722 /*
6723  * Decode SETCLIENTID response
6724  */
6725 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6726                                     struct xdr_stream *xdr,
6727                                     struct nfs4_setclientid_res *res)
6728 {
6729         struct compound_hdr hdr;
6730         int status;
6731
6732         status = decode_compound_hdr(xdr, &hdr);
6733         if (!status)
6734                 status = decode_setclientid(xdr, res);
6735         return status;
6736 }
6737
6738 /*
6739  * Decode SETCLIENTID_CONFIRM response
6740  */
6741 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6742                                             struct xdr_stream *xdr)
6743 {
6744         struct compound_hdr hdr;
6745         int status;
6746
6747         status = decode_compound_hdr(xdr, &hdr);
6748         if (!status)
6749                 status = decode_setclientid_confirm(xdr);
6750         return status;
6751 }
6752
6753 /*
6754  * Decode DELEGRETURN response
6755  */
6756 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6757                                     struct xdr_stream *xdr,
6758                                     struct nfs4_delegreturnres *res)
6759 {
6760         struct compound_hdr hdr;
6761         int status;
6762
6763         status = decode_compound_hdr(xdr, &hdr);
6764         if (status)
6765                 goto out;
6766         status = decode_sequence(xdr, &res->seq_res, rqstp);
6767         if (status)
6768                 goto out;
6769         status = decode_putfh(xdr);
6770         if (status != 0)
6771                 goto out;
6772         status = decode_getfattr(xdr, res->fattr, res->server);
6773         if (status != 0)
6774                 goto out;
6775         status = decode_delegreturn(xdr);
6776 out:
6777         return status;
6778 }
6779
6780 /*
6781  * Decode FS_LOCATIONS response
6782  */
6783 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6784                                      struct xdr_stream *xdr,
6785                                      struct nfs4_fs_locations_res *res)
6786 {
6787         struct compound_hdr hdr;
6788         int status;
6789
6790         status = decode_compound_hdr(xdr, &hdr);
6791         if (status)
6792                 goto out;
6793         status = decode_sequence(xdr, &res->seq_res, req);
6794         if (status)
6795                 goto out;
6796         status = decode_putfh(xdr);
6797         if (status)
6798                 goto out;
6799         status = decode_lookup(xdr);
6800         if (status)
6801                 goto out;
6802         xdr_enter_page(xdr, PAGE_SIZE);
6803         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6804                                          NULL, res->fs_locations,
6805                                          NULL, res->fs_locations->server);
6806 out:
6807         return status;
6808 }
6809
6810 /*
6811  * Decode SECINFO response
6812  */
6813 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6814                                 struct xdr_stream *xdr,
6815                                 struct nfs4_secinfo_res *res)
6816 {
6817         struct compound_hdr hdr;
6818         int status;
6819
6820         status = decode_compound_hdr(xdr, &hdr);
6821         if (status)
6822                 goto out;
6823         status = decode_sequence(xdr, &res->seq_res, rqstp);
6824         if (status)
6825                 goto out;
6826         status = decode_putfh(xdr);
6827         if (status)
6828                 goto out;
6829         status = decode_secinfo(xdr, res);
6830 out:
6831         return status;
6832 }
6833
6834 #if defined(CONFIG_NFS_V4_1)
6835 /*
6836  * Decode BIND_CONN_TO_SESSION response
6837  */
6838 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6839                                         struct xdr_stream *xdr,
6840                                         void *res)
6841 {
6842         struct compound_hdr hdr;
6843         int status;
6844
6845         status = decode_compound_hdr(xdr, &hdr);
6846         if (!status)
6847                 status = decode_bind_conn_to_session(xdr, res);
6848         return status;
6849 }
6850
6851 /*
6852  * Decode EXCHANGE_ID response
6853  */
6854 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6855                                     struct xdr_stream *xdr,
6856                                     void *res)
6857 {
6858         struct compound_hdr hdr;
6859         int status;
6860
6861         status = decode_compound_hdr(xdr, &hdr);
6862         if (!status)
6863                 status = decode_exchange_id(xdr, res);
6864         return status;
6865 }
6866
6867 /*
6868  * Decode CREATE_SESSION response
6869  */
6870 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6871                                        struct xdr_stream *xdr,
6872                                        struct nfs41_create_session_res *res)
6873 {
6874         struct compound_hdr hdr;
6875         int status;
6876
6877         status = decode_compound_hdr(xdr, &hdr);
6878         if (!status)
6879                 status = decode_create_session(xdr, res);
6880         return status;
6881 }
6882
6883 /*
6884  * Decode DESTROY_SESSION response
6885  */
6886 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6887                                         struct xdr_stream *xdr,
6888                                         void *res)
6889 {
6890         struct compound_hdr hdr;
6891         int status;
6892
6893         status = decode_compound_hdr(xdr, &hdr);
6894         if (!status)
6895                 status = decode_destroy_session(xdr, res);
6896         return status;
6897 }
6898
6899 /*
6900  * Decode DESTROY_CLIENTID response
6901  */
6902 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6903                                         struct xdr_stream *xdr,
6904                                         void *res)
6905 {
6906         struct compound_hdr hdr;
6907         int status;
6908
6909         status = decode_compound_hdr(xdr, &hdr);
6910         if (!status)
6911                 status = decode_destroy_clientid(xdr, res);
6912         return status;
6913 }
6914
6915 /*
6916  * Decode SEQUENCE response
6917  */
6918 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6919                                  struct xdr_stream *xdr,
6920                                  struct nfs4_sequence_res *res)
6921 {
6922         struct compound_hdr hdr;
6923         int status;
6924
6925         status = decode_compound_hdr(xdr, &hdr);
6926         if (!status)
6927                 status = decode_sequence(xdr, res, rqstp);
6928         return status;
6929 }
6930
6931 /*
6932  * Decode GET_LEASE_TIME response
6933  */
6934 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6935                                        struct xdr_stream *xdr,
6936                                        struct nfs4_get_lease_time_res *res)
6937 {
6938         struct compound_hdr hdr;
6939         int status;
6940
6941         status = decode_compound_hdr(xdr, &hdr);
6942         if (!status)
6943                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6944         if (!status)
6945                 status = decode_putrootfh(xdr);
6946         if (!status)
6947                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6948         return status;
6949 }
6950
6951 /*
6952  * Decode RECLAIM_COMPLETE response
6953  */
6954 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6955                                          struct xdr_stream *xdr,
6956                                          struct nfs41_reclaim_complete_res *res)
6957 {
6958         struct compound_hdr hdr;
6959         int status;
6960
6961         status = decode_compound_hdr(xdr, &hdr);
6962         if (!status)
6963                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6964         if (!status)
6965                 status = decode_reclaim_complete(xdr, (void *)NULL);
6966         return status;
6967 }
6968
6969 /*
6970  * Decode GETDEVICELIST response
6971  */
6972 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6973                                       struct xdr_stream *xdr,
6974                                       struct nfs4_getdevicelist_res *res)
6975 {
6976         struct compound_hdr hdr;
6977         int status;
6978
6979         dprintk("encoding getdevicelist!\n");
6980
6981         status = decode_compound_hdr(xdr, &hdr);
6982         if (status != 0)
6983                 goto out;
6984         status = decode_sequence(xdr, &res->seq_res, rqstp);
6985         if (status != 0)
6986                 goto out;
6987         status = decode_putfh(xdr);
6988         if (status != 0)
6989                 goto out;
6990         status = decode_getdevicelist(xdr, res->devlist);
6991 out:
6992         return status;
6993 }
6994
6995 /*
6996  * Decode GETDEVINFO response
6997  */
6998 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6999                                       struct xdr_stream *xdr,
7000                                       struct nfs4_getdeviceinfo_res *res)
7001 {
7002         struct compound_hdr hdr;
7003         int status;
7004
7005         status = decode_compound_hdr(xdr, &hdr);
7006         if (status != 0)
7007                 goto out;
7008         status = decode_sequence(xdr, &res->seq_res, rqstp);
7009         if (status != 0)
7010                 goto out;
7011         status = decode_getdeviceinfo(xdr, res->pdev);
7012 out:
7013         return status;
7014 }
7015
7016 /*
7017  * Decode LAYOUTGET response
7018  */
7019 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7020                                   struct xdr_stream *xdr,
7021                                   struct nfs4_layoutget_res *res)
7022 {
7023         struct compound_hdr hdr;
7024         int status;
7025
7026         status = decode_compound_hdr(xdr, &hdr);
7027         if (status)
7028                 goto out;
7029         status = decode_sequence(xdr, &res->seq_res, rqstp);
7030         if (status)
7031                 goto out;
7032         status = decode_putfh(xdr);
7033         if (status)
7034                 goto out;
7035         status = decode_layoutget(xdr, rqstp, res);
7036 out:
7037         return status;
7038 }
7039
7040 /*
7041  * Decode LAYOUTRETURN response
7042  */
7043 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7044                                      struct xdr_stream *xdr,
7045                                      struct nfs4_layoutreturn_res *res)
7046 {
7047         struct compound_hdr hdr;
7048         int status;
7049
7050         status = decode_compound_hdr(xdr, &hdr);
7051         if (status)
7052                 goto out;
7053         status = decode_sequence(xdr, &res->seq_res, rqstp);
7054         if (status)
7055                 goto out;
7056         status = decode_putfh(xdr);
7057         if (status)
7058                 goto out;
7059         status = decode_layoutreturn(xdr, res);
7060 out:
7061         return status;
7062 }
7063
7064 /*
7065  * Decode LAYOUTCOMMIT response
7066  */
7067 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7068                                      struct xdr_stream *xdr,
7069                                      struct nfs4_layoutcommit_res *res)
7070 {
7071         struct compound_hdr hdr;
7072         int status;
7073
7074         status = decode_compound_hdr(xdr, &hdr);
7075         if (status)
7076                 goto out;
7077         status = decode_sequence(xdr, &res->seq_res, rqstp);
7078         if (status)
7079                 goto out;
7080         status = decode_putfh(xdr);
7081         if (status)
7082                 goto out;
7083         status = decode_layoutcommit(xdr, rqstp, res);
7084         if (status)
7085                 goto out;
7086         decode_getfattr(xdr, res->fattr, res->server);
7087 out:
7088         return status;
7089 }
7090
7091 /*
7092  * Decode SECINFO_NO_NAME response
7093  */
7094 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7095                                         struct xdr_stream *xdr,
7096                                         struct nfs4_secinfo_res *res)
7097 {
7098         struct compound_hdr hdr;
7099         int status;
7100
7101         status = decode_compound_hdr(xdr, &hdr);
7102         if (status)
7103                 goto out;
7104         status = decode_sequence(xdr, &res->seq_res, rqstp);
7105         if (status)
7106                 goto out;
7107         status = decode_putrootfh(xdr);
7108         if (status)
7109                 goto out;
7110         status = decode_secinfo_no_name(xdr, res);
7111 out:
7112         return status;
7113 }
7114
7115 /*
7116  * Decode TEST_STATEID response
7117  */
7118 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7119                                      struct xdr_stream *xdr,
7120                                      struct nfs41_test_stateid_res *res)
7121 {
7122         struct compound_hdr hdr;
7123         int status;
7124
7125         status = decode_compound_hdr(xdr, &hdr);
7126         if (status)
7127                 goto out;
7128         status = decode_sequence(xdr, &res->seq_res, rqstp);
7129         if (status)
7130                 goto out;
7131         status = decode_test_stateid(xdr, res);
7132 out:
7133         return status;
7134 }
7135
7136 /*
7137  * Decode FREE_STATEID response
7138  */
7139 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7140                                      struct xdr_stream *xdr,
7141                                      struct nfs41_free_stateid_res *res)
7142 {
7143         struct compound_hdr hdr;
7144         int status;
7145
7146         status = decode_compound_hdr(xdr, &hdr);
7147         if (status)
7148                 goto out;
7149         status = decode_sequence(xdr, &res->seq_res, rqstp);
7150         if (status)
7151                 goto out;
7152         status = decode_free_stateid(xdr, res);
7153 out:
7154         return status;
7155 }
7156 #endif /* CONFIG_NFS_V4_1 */
7157
7158 /**
7159  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7160  *                      the local page cache.
7161  * @xdr: XDR stream where entry resides
7162  * @entry: buffer to fill in with entry data
7163  * @plus: boolean indicating whether this should be a readdirplus entry
7164  *
7165  * Returns zero if successful, otherwise a negative errno value is
7166  * returned.
7167  *
7168  * This function is not invoked during READDIR reply decoding, but
7169  * rather whenever an application invokes the getdents(2) system call
7170  * on a directory already in our cache.
7171  */
7172 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7173                        int plus)
7174 {
7175         unsigned int savep;
7176         uint32_t bitmap[3] = {0};
7177         uint32_t len;
7178         __be32 *p = xdr_inline_decode(xdr, 4);
7179         if (unlikely(!p))
7180                 goto out_overflow;
7181         if (*p == xdr_zero) {
7182                 p = xdr_inline_decode(xdr, 4);
7183                 if (unlikely(!p))
7184                         goto out_overflow;
7185                 if (*p == xdr_zero)
7186                         return -EAGAIN;
7187                 entry->eof = 1;
7188                 return -EBADCOOKIE;
7189         }
7190
7191         p = xdr_inline_decode(xdr, 12);
7192         if (unlikely(!p))
7193                 goto out_overflow;
7194         entry->prev_cookie = entry->cookie;
7195         p = xdr_decode_hyper(p, &entry->cookie);
7196         entry->len = be32_to_cpup(p);
7197
7198         p = xdr_inline_decode(xdr, entry->len);
7199         if (unlikely(!p))
7200                 goto out_overflow;
7201         entry->name = (const char *) p;
7202
7203         /*
7204          * In case the server doesn't return an inode number,
7205          * we fake one here.  (We don't use inode number 0,
7206          * since glibc seems to choke on it...)
7207          */
7208         entry->ino = 1;
7209         entry->fattr->valid = 0;
7210
7211         if (decode_attr_bitmap(xdr, bitmap) < 0)
7212                 goto out_overflow;
7213
7214         if (decode_attr_length(xdr, &len, &savep) < 0)
7215                 goto out_overflow;
7216
7217         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7218                         NULL, entry->label, entry->server) < 0)
7219                 goto out_overflow;
7220         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7221                 entry->ino = entry->fattr->mounted_on_fileid;
7222         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7223                 entry->ino = entry->fattr->fileid;
7224
7225         entry->d_type = DT_UNKNOWN;
7226         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7227                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7228
7229         return 0;
7230
7231 out_overflow:
7232         print_overflow_msg(__func__, xdr);
7233         return -EAGAIN;
7234 }
7235
7236 /*
7237  * We need to translate between nfs status return values and
7238  * the local errno values which may not be the same.
7239  */
7240 static struct {
7241         int stat;
7242         int errno;
7243 } nfs_errtbl[] = {
7244         { NFS4_OK,              0               },
7245         { NFS4ERR_PERM,         -EPERM          },
7246         { NFS4ERR_NOENT,        -ENOENT         },
7247         { NFS4ERR_IO,           -errno_NFSERR_IO},
7248         { NFS4ERR_NXIO,         -ENXIO          },
7249         { NFS4ERR_ACCESS,       -EACCES         },
7250         { NFS4ERR_EXIST,        -EEXIST         },
7251         { NFS4ERR_XDEV,         -EXDEV          },
7252         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7253         { NFS4ERR_ISDIR,        -EISDIR         },
7254         { NFS4ERR_INVAL,        -EINVAL         },
7255         { NFS4ERR_FBIG,         -EFBIG          },
7256         { NFS4ERR_NOSPC,        -ENOSPC         },
7257         { NFS4ERR_ROFS,         -EROFS          },
7258         { NFS4ERR_MLINK,        -EMLINK         },
7259         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7260         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7261         { NFS4ERR_DQUOT,        -EDQUOT         },
7262         { NFS4ERR_STALE,        -ESTALE         },
7263         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7264         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7265         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7266         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7267         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7268         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7269         { NFS4ERR_LOCKED,       -EAGAIN         },
7270         { NFS4ERR_SYMLINK,      -ELOOP          },
7271         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7272         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7273         { -1,                   -EIO            }
7274 };
7275
7276 /*
7277  * Convert an NFS error code to a local one.
7278  * This one is used jointly by NFSv2 and NFSv3.
7279  */
7280 static int
7281 nfs4_stat_to_errno(int stat)
7282 {
7283         int i;
7284         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7285                 if (nfs_errtbl[i].stat == stat)
7286                         return nfs_errtbl[i].errno;
7287         }
7288         if (stat <= 10000 || stat > 10100) {
7289                 /* The server is looney tunes. */
7290                 return -EREMOTEIO;
7291         }
7292         /* If we cannot translate the error, the recovery routines should
7293          * handle it.
7294          * Note: remaining NFSv4 error codes have values > 10000, so should
7295          * not conflict with native Linux error codes.
7296          */
7297         return -stat;
7298 }
7299
7300 #define PROC(proc, argtype, restype)                            \
7301 [NFSPROC4_CLNT_##proc] = {                                      \
7302         .p_proc   = NFSPROC4_COMPOUND,                          \
7303         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7304         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7305         .p_arglen = NFS4_##argtype##_sz,                        \
7306         .p_replen = NFS4_##restype##_sz,                        \
7307         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7308         .p_name   = #proc,                                      \
7309 }
7310
7311 struct rpc_procinfo     nfs4_procedures[] = {
7312         PROC(READ,              enc_read,               dec_read),
7313         PROC(WRITE,             enc_write,              dec_write),
7314         PROC(COMMIT,            enc_commit,             dec_commit),
7315         PROC(OPEN,              enc_open,               dec_open),
7316         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7317         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7318         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7319         PROC(CLOSE,             enc_close,              dec_close),
7320         PROC(SETATTR,           enc_setattr,            dec_setattr),
7321         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7322         PROC(RENEW,             enc_renew,              dec_renew),
7323         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7324         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7325         PROC(LOCK,              enc_lock,               dec_lock),
7326         PROC(LOCKT,             enc_lockt,              dec_lockt),
7327         PROC(LOCKU,             enc_locku,              dec_locku),
7328         PROC(ACCESS,            enc_access,             dec_access),
7329         PROC(GETATTR,           enc_getattr,            dec_getattr),
7330         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7331         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7332         PROC(REMOVE,            enc_remove,             dec_remove),
7333         PROC(RENAME,            enc_rename,             dec_rename),
7334         PROC(LINK,              enc_link,               dec_link),
7335         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7336         PROC(CREATE,            enc_create,             dec_create),
7337         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7338         PROC(STATFS,            enc_statfs,             dec_statfs),
7339         PROC(READLINK,          enc_readlink,           dec_readlink),
7340         PROC(READDIR,           enc_readdir,            dec_readdir),
7341         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7342         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7343         PROC(GETACL,            enc_getacl,             dec_getacl),
7344         PROC(SETACL,            enc_setacl,             dec_setacl),
7345         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7346         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7347         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7348 #if defined(CONFIG_NFS_V4_1)
7349         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7350         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7351         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7352         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7353         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7354         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7355         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7356         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7357         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7358         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7359         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7360         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7361         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7362         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7363         PROC(BIND_CONN_TO_SESSION,
7364                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7365         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7366 #endif /* CONFIG_NFS_V4_1 */
7367 };
7368
7369 const struct rpc_version nfs_version4 = {
7370         .number                 = 4,
7371         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7372         .procs                  = nfs4_procedures
7373 };
7374
7375 /*
7376  * Local variables:
7377  *  c-basic-offset: 8
7378  * End:
7379  */