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 "pnfs.h"
  60 #include "netns.h"
  61
  62 #define NFSDBG_FACILITY         NFSDBG_XDR
  63
  64 /* Mapping from NFS error code to "errno" error code. */
  65 #define errno_NFSERR_IO         EIO
  66
  67 static int nfs4_stat_to_errno(int);
  68
  69 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  70 #ifdef DEBUG
  71 #define NFS4_MAXTAGLEN          20
  72 #else
  73 #define NFS4_MAXTAGLEN          0
  74 #endif
  75
  76 /* lock,open owner id:
  77  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  78  */
  79 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  80 #define lock_owner_id_maxsz     (1 + 1 + 4)
  81 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  82 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  83 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define op_encode_hdr_maxsz     (1)
  85 #define op_decode_hdr_maxsz     (2)
  86 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  87 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  89 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  91                                 (NFS4_FHSIZE >> 2))
  92 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  93 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  94 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  95 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  96 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  97                                 ((3+NFS4_FHSIZE) >> 2))
  98 #define nfs4_fattr_bitmap_maxsz 4
  99 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 100 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 101 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 102 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 103 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 /* We support only one layout type per file system */
 105 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 106 /* This is based on getfattr, which uses the most attributes: */
 107 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 108                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 109                                 nfs4_group_maxsz + decode_mdsthreshold_maxsz))
 110 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 111                                 nfs4_fattr_value_maxsz)
 112 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 113 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 114                                  1 + 2 + 1 + \
 115                                 nfs4_owner_maxsz + \
 116                                 nfs4_group_maxsz + \
 117                                 4 + 4)
 118 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 119 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 120 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 121 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 122 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 123 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 124  * layout types will be returned.
 125  */
 126 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 127                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 128 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 129 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 130 #define encode_setclientid_maxsz \
 131                                 (op_encode_hdr_maxsz + \
 132                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 133                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 134                                 1 /* sc_prog */ + \
 135                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 136                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 137                                 1) /* sc_cb_ident */
 138 #define decode_setclientid_maxsz \
 139                                 (op_decode_hdr_maxsz + \
 140                                 2 + \
 141                                 1024) /* large value for CLID_INUSE */
 142 #define encode_setclientid_confirm_maxsz \
 143                                 (op_encode_hdr_maxsz + \
 144                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 145 #define decode_setclientid_confirm_maxsz \
 146                                 (op_decode_hdr_maxsz)
 147 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 148 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 149 #define encode_share_access_maxsz \
 150                                 (2)
 151 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 152 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 153 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 154 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 155                                 2 + encode_share_access_maxsz + 2 + \
 156                                 open_owner_id_maxsz + \
 157                                 encode_opentype_maxsz + \
 158                                 encode_claim_null_maxsz)
 159 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 160 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 161                                 decode_ace_maxsz)
 162 #define decode_change_info_maxsz        (5)
 163 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 164                                 decode_stateid_maxsz + \
 165                                 decode_change_info_maxsz + 1 + \
 166                                 nfs4_fattr_bitmap_maxsz + \
 167                                 decode_delegation_maxsz)
 168 #define encode_open_confirm_maxsz \
 169                                 (op_encode_hdr_maxsz + \
 170                                  encode_stateid_maxsz + 1)
 171 #define decode_open_confirm_maxsz \
 172                                 (op_decode_hdr_maxsz + \
 173                                  decode_stateid_maxsz)
 174 #define encode_open_downgrade_maxsz \
 175                                 (op_encode_hdr_maxsz + \
 176                                  encode_stateid_maxsz + 1 + \
 177                                  encode_share_access_maxsz)
 178 #define decode_open_downgrade_maxsz \
 179                                 (op_decode_hdr_maxsz + \
 180                                  decode_stateid_maxsz)
 181 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 182                                  1 + encode_stateid_maxsz)
 183 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 184                                  decode_stateid_maxsz)
 185 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 186                                  encode_stateid_maxsz + \
 187                                  encode_attrs_maxsz)
 188 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 189                                  nfs4_fattr_bitmap_maxsz)
 190 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 191                                  encode_stateid_maxsz + 3)
 192 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 193 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 194                                  2 + encode_verifier_maxsz + 5)
 195 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 196                                  decode_verifier_maxsz)
 197 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 198 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 199 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 200                                  encode_stateid_maxsz + 4)
 201 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 202                                  2 + decode_verifier_maxsz)
 203 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 204 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 205                                  decode_verifier_maxsz)
 206 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 207                                 nfs4_name_maxsz)
 208 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 209                                  decode_change_info_maxsz)
 210 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 211                                 2 * nfs4_name_maxsz)
 212 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 213                                  decode_change_info_maxsz + \
 214                                  decode_change_info_maxsz)
 215 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 216                                 nfs4_name_maxsz)
 217 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 218 #define encode_lockowner_maxsz  (7)
 219 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 220                                  7 + \
 221                                  1 + encode_stateid_maxsz + 1 + \
 222                                  encode_lockowner_maxsz)
 223 #define decode_lock_denied_maxsz \
 224                                 (8 + decode_lockowner_maxsz)
 225 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 226                                  decode_lock_denied_maxsz)
 227 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 228                                 encode_lockowner_maxsz)
 229 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 230                                  decode_lock_denied_maxsz)
 231 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 232                                  encode_stateid_maxsz + \
 233                                  4)
 234 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 235                                  decode_stateid_maxsz)
 236 #define encode_release_lockowner_maxsz \
 237                                 (op_encode_hdr_maxsz + \
 238                                  encode_lockowner_maxsz)
 239 #define decode_release_lockowner_maxsz \
 240                                 (op_decode_hdr_maxsz)
 241 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 242 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 243 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 244                                 1 + nfs4_name_maxsz + \
 245                                 1 + \
 246                                 nfs4_fattr_maxsz)
 247 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 248 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 249                                 1 + 2 + nfs4_name_maxsz + \
 250                                 encode_attrs_maxsz)
 251 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 252                                 decode_change_info_maxsz + \
 253                                 nfs4_fattr_bitmap_maxsz)
 254 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 255 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 256 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 257 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 258 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 259 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 260                                  nfs4_fattr_bitmap_maxsz + 1)
 261 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 262                                  encode_stateid_maxsz + 3)
 263 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 264 #define encode_fs_locations_maxsz \
 265                                 (encode_getattr_maxsz)
 266 #define decode_fs_locations_maxsz \
 267                                 (0)
 268 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 269 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 270
 271 #if defined(CONFIG_NFS_V4_1)
 272 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 273
 274 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 275                                 encode_verifier_maxsz + \
 276                                 1 /* co_ownerid.len */ + \
 277                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 278                                 1 /* flags */ + \
 279                                 1 /* spa_how */ + \
 280                                 0 /* SP4_NONE (for now) */ + \
 281                                 1 /* implementation id array of size 1 */ + \
 282                                 1 /* nii_domain */ + \
 283                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 284                                 1 /* nii_name */ + \
 285                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 286                                 3 /* nii_date */)
 287 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 288                                 2 /* eir_clientid */ + \
 289                                 1 /* eir_sequenceid */ + \
 290                                 1 /* eir_flags */ + \
 291                                 1 /* spr_how */ + \
 292                                 0 /* SP4_NONE (for now) */ + \
 293                                 2 /* eir_server_owner.so_minor_id */ + \
 294                                 /* eir_server_owner.so_major_id<> */ \
 295                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 296                                 /* eir_server_scope<> */ \
 297                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 298                                 1 /* eir_server_impl_id array length */ + \
 299                                 1 /* nii_domain */ + \
 300                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 301                                 1 /* nii_name */ + \
 302                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 303                                 3 /* nii_date */)
 304 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 305 #define decode_channel_attrs_maxsz  (6 + \
 306                                      1 /* ca_rdma_ird.len */ + \
 307                                      1 /* ca_rdma_ird */)
 308 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 309                                      2 /* csa_clientid */ + \
 310                                      1 /* csa_sequence */ + \
 311                                      1 /* csa_flags */ + \
 312                                      encode_channel_attrs_maxsz + \
 313                                      encode_channel_attrs_maxsz + \
 314                                      1 /* csa_cb_program */ + \
 315                                      1 /* csa_sec_parms.len (1) */ + \
 316                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 317                                      1 /* stamp */ + \
 318                                      1 /* machinename.len */ + \
 319                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 320                                      1 /* uid */ + \
 321                                      1 /* gid */ + \
 322                                      1 /* gids.len (0) */)
 323 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 324                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 325                                      1 /* csr_sequence */ + \
 326                                      1 /* csr_flags */ + \
 327                                      decode_channel_attrs_maxsz + \
 328                                      decode_channel_attrs_maxsz)
 329 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 330                                      /* bctsa_sessid */ \
 331                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 332                                      1 /* bctsa_dir */ + \
 333                                      1 /* bctsa_use_conn_in_rdma_mode */)
 334 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 335                                      /* bctsr_sessid */ \
 336                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 337                                      1 /* bctsr_dir */ + \
 338                                      1 /* bctsr_use_conn_in_rdma_mode */)
 339 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 340 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 341 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 342 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 343 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 344                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 345 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 346                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 347 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 348 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 349 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 350                                 encode_verifier_maxsz)
 351 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 352                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 353                                 decode_verifier_maxsz \
 354                                   /* verifier4 gdlr_verifier */ + \
 355                                 1 /* gdlr_deviceid_list count */ + \
 356                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 357                                             NFS4_DEVICEID4_SIZE) \
 358                                   /* gdlr_deviceid_list */ + \
 359                                 1 /* bool gdlr_eof */)
 360 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 361                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 362 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 363                                 1 /* layout type */ + \
 364                                 1 /* opaque devaddr4 length */ + \
 365                                   /* devaddr4 payload is read into page */ \
 366                                 1 /* notification bitmap length */ + \
 367                                 1 /* notification bitmap */)
 368 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 369                                 encode_stateid_maxsz)
 370 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 371                                 decode_stateid_maxsz + \
 372                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 373 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 374                                 2 /* offset */ + \
 375                                 2 /* length */ + \
 376                                 1 /* reclaim */ + \
 377                                 encode_stateid_maxsz + \
 378                                 1 /* new offset (true) */ + \
 379                                 2 /* last byte written */ + \
 380                                 1 /* nt_timechanged (false) */ + \
 381                                 1 /* layoutupdate4 layout type */ + \
 382                                 1 /* NULL filelayout layoutupdate4 payload */)
 383 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 384 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 385                                 encode_stateid_maxsz + \
 386                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 387 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 388                                 1 + decode_stateid_maxsz)
 389 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 390 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 391 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 392                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 393 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 394 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 395                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 396 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 397 #else /* CONFIG_NFS_V4_1 */
 398 #define encode_sequence_maxsz   0
 399 #define decode_sequence_maxsz   0
 400 #endif /* CONFIG_NFS_V4_1 */
 401
 402 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 403 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 404 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 405                                 encode_sequence_maxsz + \
 406                                 encode_putfh_maxsz + \
 407                                 encode_read_maxsz)
 408 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 409                                 decode_sequence_maxsz + \
 410                                 decode_putfh_maxsz + \
 411                                 decode_read_maxsz)
 412 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 413                                 encode_sequence_maxsz + \
 414                                 encode_putfh_maxsz + \
 415                                 encode_readlink_maxsz)
 416 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 417                                 decode_sequence_maxsz + \
 418                                 decode_putfh_maxsz + \
 419                                 decode_readlink_maxsz)
 420 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 421                                 encode_sequence_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_readdir_maxsz)
 424 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 425                                 decode_sequence_maxsz + \
 426                                 decode_putfh_maxsz + \
 427                                 decode_readdir_maxsz)
 428 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 429                                 encode_sequence_maxsz + \
 430                                 encode_putfh_maxsz + \
 431                                 encode_write_maxsz + \
 432                                 encode_getattr_maxsz)
 433 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 434                                 decode_sequence_maxsz + \
 435                                 decode_putfh_maxsz + \
 436                                 decode_write_maxsz + \
 437                                 decode_getattr_maxsz)
 438 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 439                                 encode_sequence_maxsz + \
 440                                 encode_putfh_maxsz + \
 441                                 encode_commit_maxsz)
 442 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 443                                 decode_sequence_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_commit_maxsz)
 446 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 447                                 encode_sequence_maxsz + \
 448                                 encode_putfh_maxsz + \
 449                                 encode_open_maxsz + \
 450                                 encode_access_maxsz + \
 451                                 encode_getfh_maxsz + \
 452                                 encode_getattr_maxsz)
 453 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 454                                 decode_sequence_maxsz + \
 455                                 decode_putfh_maxsz + \
 456                                 decode_open_maxsz + \
 457                                 decode_access_maxsz + \
 458                                 decode_getfh_maxsz + \
 459                                 decode_getattr_maxsz)
 460 #define NFS4_enc_open_confirm_sz \
 461                                 (compound_encode_hdr_maxsz + \
 462                                  encode_putfh_maxsz + \
 463                                  encode_open_confirm_maxsz)
 464 #define NFS4_dec_open_confirm_sz \
 465                                 (compound_decode_hdr_maxsz + \
 466                                  decode_putfh_maxsz + \
 467                                  decode_open_confirm_maxsz)
 468 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 469                                         encode_sequence_maxsz + \
 470                                         encode_putfh_maxsz + \
 471                                         encode_open_maxsz + \
 472                                         encode_access_maxsz + \
 473                                         encode_getattr_maxsz)
 474 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 475                                         decode_sequence_maxsz + \
 476                                         decode_putfh_maxsz + \
 477                                         decode_open_maxsz + \
 478                                         decode_access_maxsz + \
 479                                         decode_getattr_maxsz)
 480 #define NFS4_enc_open_downgrade_sz \
 481                                 (compound_encode_hdr_maxsz + \
 482                                  encode_sequence_maxsz + \
 483                                  encode_putfh_maxsz + \
 484                                  encode_open_downgrade_maxsz + \
 485                                  encode_getattr_maxsz)
 486 #define NFS4_dec_open_downgrade_sz \
 487                                 (compound_decode_hdr_maxsz + \
 488                                  decode_sequence_maxsz + \
 489                                  decode_putfh_maxsz + \
 490                                  decode_open_downgrade_maxsz + \
 491                                  decode_getattr_maxsz)
 492 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 493                                  encode_sequence_maxsz + \
 494                                  encode_putfh_maxsz + \
 495                                  encode_close_maxsz + \
 496                                  encode_getattr_maxsz)
 497 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 498                                  decode_sequence_maxsz + \
 499                                  decode_putfh_maxsz + \
 500                                  decode_close_maxsz + \
 501                                  decode_getattr_maxsz)
 502 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 503                                  encode_sequence_maxsz + \
 504                                  encode_putfh_maxsz + \
 505                                  encode_setattr_maxsz + \
 506                                  encode_getattr_maxsz)
 507 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 508                                  decode_sequence_maxsz + \
 509                                  decode_putfh_maxsz + \
 510                                  decode_setattr_maxsz + \
 511                                  decode_getattr_maxsz)
 512 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 513                                 encode_sequence_maxsz + \
 514                                 encode_putfh_maxsz + \
 515                                 encode_fsinfo_maxsz)
 516 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 517                                 decode_sequence_maxsz + \
 518                                 decode_putfh_maxsz + \
 519                                 decode_fsinfo_maxsz)
 520 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 521                                 encode_renew_maxsz)
 522 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 523                                 decode_renew_maxsz)
 524 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 525                                 encode_setclientid_maxsz)
 526 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 527                                 decode_setclientid_maxsz)
 528 #define NFS4_enc_setclientid_confirm_sz \
 529                                 (compound_encode_hdr_maxsz + \
 530                                 encode_setclientid_confirm_maxsz + \
 531                                 encode_putrootfh_maxsz + \
 532                                 encode_fsinfo_maxsz)
 533 #define NFS4_dec_setclientid_confirm_sz \
 534                                 (compound_decode_hdr_maxsz + \
 535                                 decode_setclientid_confirm_maxsz + \
 536                                 decode_putrootfh_maxsz + \
 537                                 decode_fsinfo_maxsz)
 538 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 539                                 encode_sequence_maxsz + \
 540                                 encode_putfh_maxsz + \
 541                                 encode_lock_maxsz)
 542 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 543                                 decode_sequence_maxsz + \
 544                                 decode_putfh_maxsz + \
 545                                 decode_lock_maxsz)
 546 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 547                                 encode_sequence_maxsz + \
 548                                 encode_putfh_maxsz + \
 549                                 encode_lockt_maxsz)
 550 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 551                                  decode_sequence_maxsz + \
 552                                  decode_putfh_maxsz + \
 553                                  decode_lockt_maxsz)
 554 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 555                                 encode_sequence_maxsz + \
 556                                 encode_putfh_maxsz + \
 557                                 encode_locku_maxsz)
 558 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 559                                 decode_sequence_maxsz + \
 560                                 decode_putfh_maxsz + \
 561                                 decode_locku_maxsz)
 562 #define NFS4_enc_release_lockowner_sz \
 563                                 (compound_encode_hdr_maxsz + \
 564                                  encode_lockowner_maxsz)
 565 #define NFS4_dec_release_lockowner_sz \
 566                                 (compound_decode_hdr_maxsz + \
 567                                  decode_lockowner_maxsz)
 568 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 569                                 encode_sequence_maxsz + \
 570                                 encode_putfh_maxsz + \
 571                                 encode_access_maxsz + \
 572                                 encode_getattr_maxsz)
 573 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 574                                 decode_sequence_maxsz + \
 575                                 decode_putfh_maxsz + \
 576                                 decode_access_maxsz + \
 577                                 decode_getattr_maxsz)
 578 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 579                                 encode_sequence_maxsz + \
 580                                 encode_putfh_maxsz + \
 581                                 encode_getattr_maxsz)
 582 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 583                                 decode_sequence_maxsz + \
 584                                 decode_putfh_maxsz + \
 585                                 decode_getattr_maxsz)
 586 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 587                                 encode_sequence_maxsz + \
 588                                 encode_putfh_maxsz + \
 589                                 encode_lookup_maxsz + \
 590                                 encode_getattr_maxsz + \
 591                                 encode_getfh_maxsz)
 592 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_lookup_maxsz + \
 596                                 decode_getattr_maxsz + \
 597                                 decode_getfh_maxsz)
 598 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 599                                 encode_sequence_maxsz + \
 600                                 encode_putrootfh_maxsz + \
 601                                 encode_getattr_maxsz + \
 602                                 encode_getfh_maxsz)
 603 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 604                                 decode_sequence_maxsz + \
 605                                 decode_putrootfh_maxsz + \
 606                                 decode_getattr_maxsz + \
 607                                 decode_getfh_maxsz)
 608 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 609                                 encode_sequence_maxsz + \
 610                                 encode_putfh_maxsz + \
 611                                 encode_remove_maxsz)
 612 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 613                                 decode_sequence_maxsz + \
 614                                 decode_putfh_maxsz + \
 615                                 decode_remove_maxsz)
 616 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 617                                 encode_sequence_maxsz + \
 618                                 encode_putfh_maxsz + \
 619                                 encode_savefh_maxsz + \
 620                                 encode_putfh_maxsz + \
 621                                 encode_rename_maxsz)
 622 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 623                                 decode_sequence_maxsz + \
 624                                 decode_putfh_maxsz + \
 625                                 decode_savefh_maxsz + \
 626                                 decode_putfh_maxsz + \
 627                                 decode_rename_maxsz)
 628 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 629                                 encode_sequence_maxsz + \
 630                                 encode_putfh_maxsz + \
 631                                 encode_savefh_maxsz + \
 632                                 encode_putfh_maxsz + \
 633                                 encode_link_maxsz + \
 634                                 encode_restorefh_maxsz + \
 635                                 encode_getattr_maxsz)
 636 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 637                                 decode_sequence_maxsz + \
 638                                 decode_putfh_maxsz + \
 639                                 decode_savefh_maxsz + \
 640                                 decode_putfh_maxsz + \
 641                                 decode_link_maxsz + \
 642                                 decode_restorefh_maxsz + \
 643                                 decode_getattr_maxsz)
 644 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 645                                 encode_sequence_maxsz + \
 646                                 encode_putfh_maxsz + \
 647                                 encode_symlink_maxsz + \
 648                                 encode_getattr_maxsz + \
 649                                 encode_getfh_maxsz)
 650 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 651                                 decode_sequence_maxsz + \
 652                                 decode_putfh_maxsz + \
 653                                 decode_symlink_maxsz + \
 654                                 decode_getattr_maxsz + \
 655                                 decode_getfh_maxsz)
 656 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 657                                 encode_sequence_maxsz + \
 658                                 encode_putfh_maxsz + \
 659                                 encode_create_maxsz + \
 660                                 encode_getfh_maxsz + \
 661                                 encode_getattr_maxsz)
 662 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 663                                 decode_sequence_maxsz + \
 664                                 decode_putfh_maxsz + \
 665                                 decode_create_maxsz + \
 666                                 decode_getfh_maxsz + \
 667                                 decode_getattr_maxsz)
 668 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 669                                 encode_sequence_maxsz + \
 670                                 encode_putfh_maxsz + \
 671                                 encode_getattr_maxsz)
 672 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 673                                 decode_sequence_maxsz + \
 674                                 decode_putfh_maxsz + \
 675                                 decode_getattr_maxsz)
 676 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 677                                 encode_sequence_maxsz + \
 678                                 encode_putfh_maxsz + \
 679                                 encode_statfs_maxsz)
 680 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 681                                 decode_sequence_maxsz + \
 682                                 decode_putfh_maxsz + \
 683                                 decode_statfs_maxsz)
 684 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 685                                 encode_sequence_maxsz + \
 686                                 encode_putfh_maxsz + \
 687                                 encode_getattr_maxsz)
 688 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 689                                 decode_sequence_maxsz + \
 690                                 decode_putfh_maxsz + \
 691                                 decode_getattr_maxsz)
 692 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 693                                 encode_sequence_maxsz + \
 694                                 encode_putfh_maxsz + \
 695                                 encode_delegreturn_maxsz + \
 696                                 encode_getattr_maxsz)
 697 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 698                                 decode_sequence_maxsz + \
 699                                 decode_delegreturn_maxsz + \
 700                                 decode_getattr_maxsz)
 701 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 702                                 encode_sequence_maxsz + \
 703                                 encode_putfh_maxsz + \
 704                                 encode_getacl_maxsz)
 705 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 706                                 decode_sequence_maxsz + \
 707                                 decode_putfh_maxsz + \
 708                                 decode_getacl_maxsz)
 709 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 710                                 encode_sequence_maxsz + \
 711                                 encode_putfh_maxsz + \
 712                                 encode_setacl_maxsz)
 713 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 714                                 decode_sequence_maxsz + \
 715                                 decode_putfh_maxsz + \
 716                                 decode_setacl_maxsz)
 717 #define NFS4_enc_fs_locations_sz \
 718                                 (compound_encode_hdr_maxsz + \
 719                                  encode_sequence_maxsz + \
 720                                  encode_putfh_maxsz + \
 721                                  encode_lookup_maxsz + \
 722                                  encode_fs_locations_maxsz)
 723 #define NFS4_dec_fs_locations_sz \
 724                                 (compound_decode_hdr_maxsz + \
 725                                  decode_sequence_maxsz + \
 726                                  decode_putfh_maxsz + \
 727                                  decode_lookup_maxsz + \
 728                                  decode_fs_locations_maxsz)
 729 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 730                                 encode_sequence_maxsz + \
 731                                 encode_putfh_maxsz + \
 732                                 encode_secinfo_maxsz)
 733 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 734                                 decode_sequence_maxsz + \
 735                                 decode_putfh_maxsz + \
 736                                 decode_secinfo_maxsz)
 737 #if defined(CONFIG_NFS_V4_1)
 738 #define NFS4_enc_bind_conn_to_session_sz \
 739                                 (compound_encode_hdr_maxsz + \
 740                                  encode_bind_conn_to_session_maxsz)
 741 #define NFS4_dec_bind_conn_to_session_sz \
 742                                 (compound_decode_hdr_maxsz + \
 743                                  decode_bind_conn_to_session_maxsz)
 744 #define NFS4_enc_exchange_id_sz \
 745                                 (compound_encode_hdr_maxsz + \
 746                                  encode_exchange_id_maxsz)
 747 #define NFS4_dec_exchange_id_sz \
 748                                 (compound_decode_hdr_maxsz + \
 749                                  decode_exchange_id_maxsz)
 750 #define NFS4_enc_create_session_sz \
 751                                 (compound_encode_hdr_maxsz + \
 752                                  encode_create_session_maxsz)
 753 #define NFS4_dec_create_session_sz \
 754                                 (compound_decode_hdr_maxsz + \
 755                                  decode_create_session_maxsz)
 756 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 757                                          encode_destroy_session_maxsz)
 758 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 759                                          decode_destroy_session_maxsz)
 760 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 761                                          encode_destroy_clientid_maxsz)
 762 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 763                                          decode_destroy_clientid_maxsz)
 764 #define NFS4_enc_sequence_sz \
 765                                 (compound_decode_hdr_maxsz + \
 766                                  encode_sequence_maxsz)
 767 #define NFS4_dec_sequence_sz \
 768                                 (compound_decode_hdr_maxsz + \
 769                                  decode_sequence_maxsz)
 770 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 771                                          encode_sequence_maxsz + \
 772                                          encode_putrootfh_maxsz + \
 773                                          encode_fsinfo_maxsz)
 774 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 775                                          decode_sequence_maxsz + \
 776                                          decode_putrootfh_maxsz + \
 777                                          decode_fsinfo_maxsz)
 778 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 779                                          encode_sequence_maxsz + \
 780                                          encode_reclaim_complete_maxsz)
 781 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 782                                          decode_sequence_maxsz + \
 783                                          decode_reclaim_complete_maxsz)
 784 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 785                                 encode_sequence_maxsz + \
 786                                 encode_putfh_maxsz + \
 787                                 encode_getdevicelist_maxsz)
 788 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 789                                 decode_sequence_maxsz + \
 790                                 decode_putfh_maxsz + \
 791                                 decode_getdevicelist_maxsz)
 792 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 793                                 encode_sequence_maxsz +\
 794                                 encode_getdeviceinfo_maxsz)
 795 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 796                                 decode_sequence_maxsz + \
 797                                 decode_getdeviceinfo_maxsz)
 798 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 799                                 encode_sequence_maxsz + \
 800                                 encode_putfh_maxsz +        \
 801                                 encode_layoutget_maxsz)
 802 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 803                                 decode_sequence_maxsz + \
 804                                 decode_putfh_maxsz +        \
 805                                 decode_layoutget_maxsz)
 806 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 807                                 encode_sequence_maxsz +\
 808                                 encode_putfh_maxsz + \
 809                                 encode_layoutcommit_maxsz + \
 810                                 encode_getattr_maxsz)
 811 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 812                                 decode_sequence_maxsz + \
 813                                 decode_putfh_maxsz + \
 814                                 decode_layoutcommit_maxsz + \
 815                                 decode_getattr_maxsz)
 816 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 817                                 encode_sequence_maxsz + \
 818                                 encode_putfh_maxsz + \
 819                                 encode_layoutreturn_maxsz)
 820 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 821                                 decode_sequence_maxsz + \
 822                                 decode_putfh_maxsz + \
 823                                 decode_layoutreturn_maxsz)
 824 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 825                                         encode_sequence_maxsz + \
 826                                         encode_putrootfh_maxsz +\
 827                                         encode_secinfo_no_name_maxsz)
 828 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 829                                         decode_sequence_maxsz + \
 830                                         decode_putrootfh_maxsz + \
 831                                         decode_secinfo_no_name_maxsz)
 832 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 833                                          encode_sequence_maxsz + \
 834                                          encode_test_stateid_maxsz)
 835 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 836                                          decode_sequence_maxsz + \
 837                                          decode_test_stateid_maxsz)
 838 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 839                                          encode_sequence_maxsz + \
 840                                          encode_free_stateid_maxsz)
 841 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 842                                          decode_sequence_maxsz + \
 843                                          decode_free_stateid_maxsz)
 844
 845 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 846                                       compound_encode_hdr_maxsz +
 847                                       encode_sequence_maxsz +
 848                                       encode_putfh_maxsz +
 849                                       encode_getattr_maxsz) *
 850                                      XDR_UNIT);
 851
 852 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 853                                      compound_decode_hdr_maxsz +
 854                                      decode_sequence_maxsz +
 855                                      decode_putfh_maxsz) *
 856                                     XDR_UNIT);
 857 #endif /* CONFIG_NFS_V4_1 */
 858
 859 static const umode_t nfs_type2fmt[] = {
 860         [NF4BAD] = 0,
 861         [NF4REG] = S_IFREG,
 862         [NF4DIR] = S_IFDIR,
 863         [NF4BLK] = S_IFBLK,
 864         [NF4CHR] = S_IFCHR,
 865         [NF4LNK] = S_IFLNK,
 866         [NF4SOCK] = S_IFSOCK,
 867         [NF4FIFO] = S_IFIFO,
 868         [NF4ATTRDIR] = 0,
 869         [NF4NAMEDATTR] = 0,
 870 };
 871
 872 struct compound_hdr {
 873         int32_t         status;
 874         uint32_t        nops;
 875         __be32 *        nops_p;
 876         uint32_t        taglen;
 877         char *          tag;
 878         uint32_t        replen;         /* expected reply words */
 879         u32             minorversion;
 880 };
 881
 882 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 883 {
 884         __be32 *p = xdr_reserve_space(xdr, nbytes);
 885         BUG_ON(!p);
 886         return p;
 887 }
 888
 889 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 890 {
 891         __be32 *p;
 892
 893         p = xdr_reserve_space(xdr, len);
 894         xdr_encode_opaque_fixed(p, buf, len);
 895 }
 896
 897 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 898 {
 899         __be32 *p;
 900
 901         p = reserve_space(xdr, 4 + len);
 902         xdr_encode_opaque(p, str, len);
 903 }
 904
 905 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 906 {
 907         __be32 *p;
 908
 909         p = reserve_space(xdr, 4);
 910         *p = cpu_to_be32(n);
 911 }
 912
 913 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 914 {
 915         __be32 *p;
 916
 917         p = reserve_space(xdr, 8);
 918         xdr_encode_hyper(p, n);
 919 }
 920
 921 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 922                 const struct nfs_seqid *seqid)
 923 {
 924         encode_uint32(xdr, seqid->sequence->counter);
 925 }
 926
 927 static void encode_compound_hdr(struct xdr_stream *xdr,
 928                                 struct rpc_rqst *req,
 929                                 struct compound_hdr *hdr)
 930 {
 931         __be32 *p;
 932         struct rpc_auth *auth = req->rq_cred->cr_auth;
 933
 934         /* initialize running count of expected bytes in reply.
 935          * NOTE: the replied tag SHOULD be the same is the one sent,
 936          * but this is not required as a MUST for the server to do so. */
 937         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 938
 939         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 940         encode_string(xdr, hdr->taglen, hdr->tag);
 941         p = reserve_space(xdr, 8);
 942         *p++ = cpu_to_be32(hdr->minorversion);
 943         hdr->nops_p = p;
 944         *p = cpu_to_be32(hdr->nops);
 945 }
 946
 947 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 948                 uint32_t replen,
 949                 struct compound_hdr *hdr)
 950 {
 951         encode_uint32(xdr, op);
 952         hdr->nops++;
 953         hdr->replen += replen;
 954 }
 955
 956 static void encode_nops(struct compound_hdr *hdr)
 957 {
 958         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 959         *hdr->nops_p = htonl(hdr->nops);
 960 }
 961
 962 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 963 {
 964         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 965 }
 966
 967 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 968 {
 969         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 970 }
 971
 972 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 973 {
 974         char owner_name[IDMAP_NAMESZ];
 975         char owner_group[IDMAP_NAMESZ];
 976         int owner_namelen = 0;
 977         int owner_grouplen = 0;
 978         __be32 *p;
 979         __be32 *q;
 980         int len;
 981         uint32_t bmval0 = 0;
 982         uint32_t bmval1 = 0;
 983
 984         /*
 985          * We reserve enough space to write the entire attribute buffer at once.
 986          * In the worst-case, this would be
 987          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 988          *          = 36 bytes, plus any contribution from variable-length fields
 989          *            such as owner/group.
 990          */
 991         len = 16;
 992
 993         /* Sigh */
 994         if (iap->ia_valid & ATTR_SIZE)
 995                 len += 8;
 996         if (iap->ia_valid & ATTR_MODE)
 997                 len += 4;
 998         if (iap->ia_valid & ATTR_UID) {
 999                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1000                 if (owner_namelen < 0) {
1001                         dprintk("nfs: couldn't resolve uid %d to string\n",
1002                                         iap->ia_uid);
1003                         /* XXX */
1004                         strcpy(owner_name, "nobody");
1005                         owner_namelen = sizeof("nobody") - 1;
1006                         /* goto out; */
1007                 }
1008                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1009         }
1010         if (iap->ia_valid & ATTR_GID) {
1011                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1012                 if (owner_grouplen < 0) {
1013                         dprintk("nfs: couldn't resolve gid %d to string\n",
1014                                         iap->ia_gid);
1015                         strcpy(owner_group, "nobody");
1016                         owner_grouplen = sizeof("nobody") - 1;
1017                         /* goto out; */
1018                 }
1019                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1020         }
1021         if (iap->ia_valid & ATTR_ATIME_SET)
1022                 len += 16;
1023         else if (iap->ia_valid & ATTR_ATIME)
1024                 len += 4;
1025         if (iap->ia_valid & ATTR_MTIME_SET)
1026                 len += 16;
1027         else if (iap->ia_valid & ATTR_MTIME)
1028                 len += 4;
1029         p = reserve_space(xdr, len);
1030
1031         /*
1032          * We write the bitmap length now, but leave the bitmap and the attribute
1033          * buffer length to be backfilled at the end of this routine.
1034          */
1035         *p++ = cpu_to_be32(2);
1036         q = p;
1037         p += 3;
1038
1039         if (iap->ia_valid & ATTR_SIZE) {
1040                 bmval0 |= FATTR4_WORD0_SIZE;
1041                 p = xdr_encode_hyper(p, iap->ia_size);
1042         }
1043         if (iap->ia_valid & ATTR_MODE) {
1044                 bmval1 |= FATTR4_WORD1_MODE;
1045                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1046         }
1047         if (iap->ia_valid & ATTR_UID) {
1048                 bmval1 |= FATTR4_WORD1_OWNER;
1049                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1050         }
1051         if (iap->ia_valid & ATTR_GID) {
1052                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1053                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1054         }
1055         if (iap->ia_valid & ATTR_ATIME_SET) {
1056                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1057                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1058                 *p++ = cpu_to_be32(0);
1059                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1060                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1061         }
1062         else if (iap->ia_valid & ATTR_ATIME) {
1063                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1064                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1065         }
1066         if (iap->ia_valid & ATTR_MTIME_SET) {
1067                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1068                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1069                 *p++ = cpu_to_be32(0);
1070                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1071                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1072         }
1073         else if (iap->ia_valid & ATTR_MTIME) {
1074                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1075                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1076         }
1077
1078         /*
1079          * Now we backfill the bitmap and the attribute buffer length.
1080          */
1081         if (len != ((char *)p - (char *)q) + 4) {
1082                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1083                                 len, ((char *)p - (char *)q) + 4);
1084                 BUG();
1085         }
1086         len = (char *)p - (char *)q - 12;
1087         *q++ = htonl(bmval0);
1088         *q++ = htonl(bmval1);
1089         *q = htonl(len);
1090
1091 /* out: */
1092 }
1093
1094 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1095 {
1096         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1097         encode_uint32(xdr, access);
1098 }
1099
1100 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1101 {
1102         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1103         encode_nfs4_seqid(xdr, arg->seqid);
1104         encode_nfs4_stateid(xdr, arg->stateid);
1105 }
1106
1107 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1108 {
1109         __be32 *p;
1110
1111         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1112         p = reserve_space(xdr, 12);
1113         p = xdr_encode_hyper(p, args->offset);
1114         *p = cpu_to_be32(args->count);
1115 }
1116
1117 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1118 {
1119         __be32 *p;
1120
1121         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1122         encode_uint32(xdr, create->ftype);
1123
1124         switch (create->ftype) {
1125         case NF4LNK:
1126                 p = reserve_space(xdr, 4);
1127                 *p = cpu_to_be32(create->u.symlink.len);
1128                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1129                 break;
1130
1131         case NF4BLK: case NF4CHR:
1132                 p = reserve_space(xdr, 8);
1133                 *p++ = cpu_to_be32(create->u.device.specdata1);
1134                 *p = cpu_to_be32(create->u.device.specdata2);
1135                 break;
1136
1137         default:
1138                 break;
1139         }
1140
1141         encode_string(xdr, create->name->len, create->name->name);
1142         encode_attrs(xdr, create->attrs, create->server);
1143 }
1144
1145 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1146 {
1147         __be32 *p;
1148
1149         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1150         p = reserve_space(xdr, 8);
1151         *p++ = cpu_to_be32(1);
1152         *p = cpu_to_be32(bitmap);
1153 }
1154
1155 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1156 {
1157         __be32 *p;
1158
1159         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1160         p = reserve_space(xdr, 12);
1161         *p++ = cpu_to_be32(2);
1162         *p++ = cpu_to_be32(bm0);
1163         *p = cpu_to_be32(bm1);
1164 }
1165
1166 static void
1167 encode_getattr_three(struct xdr_stream *xdr,
1168                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1169                      struct compound_hdr *hdr)
1170 {
1171         __be32 *p;
1172
1173         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1174         if (bm2) {
1175                 p = reserve_space(xdr, 16);
1176                 *p++ = cpu_to_be32(3);
1177                 *p++ = cpu_to_be32(bm0);
1178                 *p++ = cpu_to_be32(bm1);
1179                 *p = cpu_to_be32(bm2);
1180         } else if (bm1) {
1181                 p = reserve_space(xdr, 12);
1182                 *p++ = cpu_to_be32(2);
1183                 *p++ = cpu_to_be32(bm0);
1184                 *p = cpu_to_be32(bm1);
1185         } else {
1186                 p = reserve_space(xdr, 8);
1187                 *p++ = cpu_to_be32(1);
1188                 *p = cpu_to_be32(bm0);
1189         }
1190 }
1191
1192 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1193 {
1194         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1195                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1196 }
1197
1198 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1199                                  const u32 *open_bitmap,
1200                                  struct compound_hdr *hdr)
1201 {
1202         encode_getattr_three(xdr,
1203                              bitmask[0] & open_bitmap[0],
1204                              bitmask[1] & open_bitmap[1],
1205                              bitmask[2] & open_bitmap[2],
1206                              hdr);
1207 }
1208
1209 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1210 {
1211         encode_getattr_three(xdr,
1212                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1213                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1214                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1215                              hdr);
1216 }
1217
1218 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1219 {
1220         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1221                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1222 }
1223
1224 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1225 {
1226         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1227 }
1228
1229 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1230 {
1231         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1232         encode_string(xdr, name->len, name->name);
1233 }
1234
1235 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1236 {
1237         if (fl->fl_type == F_RDLCK)
1238                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1239         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1240 }
1241
1242 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1243 {
1244         if (fl->fl_end == OFFSET_MAX)
1245                 return ~(uint64_t)0;
1246         return fl->fl_end - fl->fl_start + 1;
1247 }
1248
1249 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1250 {
1251         __be32 *p;
1252
1253         p = reserve_space(xdr, 32);
1254         p = xdr_encode_hyper(p, lowner->clientid);
1255         *p++ = cpu_to_be32(20);
1256         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1257         *p++ = cpu_to_be32(lowner->s_dev);
1258         xdr_encode_hyper(p, lowner->id);
1259 }
1260
1261 /*
1262  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1263  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1264  */
1265 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1266 {
1267         __be32 *p;
1268
1269         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1270         p = reserve_space(xdr, 28);
1271         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1272         *p++ = cpu_to_be32(args->reclaim);
1273         p = xdr_encode_hyper(p, args->fl->fl_start);
1274         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1275         *p = cpu_to_be32(args->new_lock_owner);
1276         if (args->new_lock_owner){
1277                 encode_nfs4_seqid(xdr, args->open_seqid);
1278                 encode_nfs4_stateid(xdr, args->open_stateid);
1279                 encode_nfs4_seqid(xdr, args->lock_seqid);
1280                 encode_lockowner(xdr, &args->lock_owner);
1281         }
1282         else {
1283                 encode_nfs4_stateid(xdr, args->lock_stateid);
1284                 encode_nfs4_seqid(xdr, args->lock_seqid);
1285         }
1286 }
1287
1288 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1289 {
1290         __be32 *p;
1291
1292         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1293         p = reserve_space(xdr, 20);
1294         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1295         p = xdr_encode_hyper(p, args->fl->fl_start);
1296         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1297         encode_lockowner(xdr, &args->lock_owner);
1298 }
1299
1300 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1301 {
1302         __be32 *p;
1303
1304         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1305         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1306         encode_nfs4_seqid(xdr, args->seqid);
1307         encode_nfs4_stateid(xdr, args->stateid);
1308         p = reserve_space(xdr, 16);
1309         p = xdr_encode_hyper(p, args->fl->fl_start);
1310         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1311 }
1312
1313 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1314 {
1315         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1316         encode_lockowner(xdr, lowner);
1317 }
1318
1319 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1320 {
1321         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1322         encode_string(xdr, name->len, name->name);
1323 }
1324
1325 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1326 {
1327         __be32 *p;
1328
1329         p = reserve_space(xdr, 8);
1330         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1331         case FMODE_READ:
1332                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1333                 break;
1334         case FMODE_WRITE:
1335                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1336                 break;
1337         case FMODE_READ|FMODE_WRITE:
1338                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1339                 break;
1340         default:
1341                 *p++ = cpu_to_be32(0);
1342         }
1343         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1344 }
1345
1346 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1347 {
1348         __be32 *p;
1349  /*
1350  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1351  * owner 4 = 32
1352  */
1353         encode_nfs4_seqid(xdr, arg->seqid);
1354         encode_share_access(xdr, arg->fmode);
1355         p = reserve_space(xdr, 36);
1356         p = xdr_encode_hyper(p, arg->clientid);
1357         *p++ = cpu_to_be32(24);
1358         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1359         *p++ = cpu_to_be32(arg->server->s_dev);
1360         *p++ = cpu_to_be32(arg->id.uniquifier);
1361         xdr_encode_hyper(p, arg->id.create_time);
1362 }
1363
1364 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1365 {
1366         __be32 *p;
1367         struct nfs_client *clp;
1368
1369         p = reserve_space(xdr, 4);
1370         switch(arg->open_flags & O_EXCL) {
1371         case 0:
1372                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1373                 encode_attrs(xdr, arg->u.attrs, arg->server);
1374                 break;
1375         default:
1376                 clp = arg->server->nfs_client;
1377                 if (clp->cl_mvops->minor_version > 0) {
1378                         if (nfs4_has_persistent_session(clp)) {
1379                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1380                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1381                         } else {
1382                                 struct iattr dummy;
1383
1384                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1385                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1386                                 dummy.ia_valid = 0;
1387                                 encode_attrs(xdr, &dummy, arg->server);
1388                         }
1389                 } else {
1390                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1391                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1392                 }
1393         }
1394 }
1395
1396 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397 {
1398         __be32 *p;
1399
1400         p = reserve_space(xdr, 4);
1401         switch (arg->open_flags & O_CREAT) {
1402         case 0:
1403                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1404                 break;
1405         default:
1406                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1407                 encode_createmode(xdr, arg);
1408         }
1409 }
1410
1411 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1412 {
1413         __be32 *p;
1414
1415         p = reserve_space(xdr, 4);
1416         switch (delegation_type) {
1417         case 0:
1418                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1419                 break;
1420         case FMODE_READ:
1421                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1422                 break;
1423         case FMODE_WRITE|FMODE_READ:
1424                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1425                 break;
1426         default:
1427                 BUG();
1428         }
1429 }
1430
1431 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1432 {
1433         __be32 *p;
1434
1435         p = reserve_space(xdr, 4);
1436         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1437         encode_string(xdr, name->len, name->name);
1438 }
1439
1440 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1441 {
1442         __be32 *p;
1443
1444         p = reserve_space(xdr, 4);
1445         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1446         encode_delegation_type(xdr, type);
1447 }
1448
1449 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1450 {
1451         __be32 *p;
1452
1453         p = reserve_space(xdr, 4);
1454         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1455         encode_nfs4_stateid(xdr, stateid);
1456         encode_string(xdr, name->len, name->name);
1457 }
1458
1459 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1460 {
1461         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1462         encode_openhdr(xdr, arg);
1463         encode_opentype(xdr, arg);
1464         switch (arg->claim) {
1465         case NFS4_OPEN_CLAIM_NULL:
1466                 encode_claim_null(xdr, arg->name);
1467                 break;
1468         case NFS4_OPEN_CLAIM_PREVIOUS:
1469                 encode_claim_previous(xdr, arg->u.delegation_type);
1470                 break;
1471         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1472                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1473                 break;
1474         default:
1475                 BUG();
1476         }
1477 }
1478
1479 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1480 {
1481         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1482         encode_nfs4_stateid(xdr, arg->stateid);
1483         encode_nfs4_seqid(xdr, arg->seqid);
1484 }
1485
1486 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1487 {
1488         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1489         encode_nfs4_stateid(xdr, arg->stateid);
1490         encode_nfs4_seqid(xdr, arg->seqid);
1491         encode_share_access(xdr, arg->fmode);
1492 }
1493
1494 static void
1495 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1496 {
1497         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1498         encode_string(xdr, fh->size, fh->data);
1499 }
1500
1501 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1502 {
1503         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1504 }
1505
1506 static void encode_open_stateid(struct xdr_stream *xdr,
1507                 const struct nfs_open_context *ctx,
1508                 const struct nfs_lock_context *l_ctx,
1509                 fmode_t fmode,
1510                 int zero_seqid)
1511 {
1512         nfs4_stateid stateid;
1513
1514         if (ctx->state != NULL) {
1515                 const struct nfs_lockowner *lockowner = NULL;
1516
1517                 if (l_ctx != NULL)
1518                         lockowner = &l_ctx->lockowner;
1519                 nfs4_select_rw_stateid(&stateid, ctx->state,
1520                                 fmode, lockowner);
1521                 if (zero_seqid)
1522                         stateid.seqid = 0;
1523                 encode_nfs4_stateid(xdr, &stateid);
1524         } else
1525                 encode_nfs4_stateid(xdr, &zero_stateid);
1526 }
1527
1528 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1529 {
1530         __be32 *p;
1531
1532         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1533         encode_open_stateid(xdr, args->context, args->lock_context,
1534                         FMODE_READ, hdr->minorversion);
1535
1536         p = reserve_space(xdr, 12);
1537         p = xdr_encode_hyper(p, args->offset);
1538         *p = cpu_to_be32(args->count);
1539 }
1540
1541 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1542 {
1543         uint32_t attrs[2] = {
1544                 FATTR4_WORD0_RDATTR_ERROR,
1545                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1546         };
1547         uint32_t dircount = readdir->count >> 1;
1548         __be32 *p, verf[2];
1549
1550         if (readdir->plus) {
1551                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1552                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1553                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1554                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1555                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1556                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1557                 dircount >>= 1;
1558         }
1559         /* Use mounted_on_fileid only if the server supports it */
1560         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1561                 attrs[0] |= FATTR4_WORD0_FILEID;
1562
1563         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1564         encode_uint64(xdr, readdir->cookie);
1565         encode_nfs4_verifier(xdr, &readdir->verifier);
1566         p = reserve_space(xdr, 20);
1567         *p++ = cpu_to_be32(dircount);
1568         *p++ = cpu_to_be32(readdir->count);
1569         *p++ = cpu_to_be32(2);
1570
1571         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1572         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1573         memcpy(verf, readdir->verifier.data, sizeof(verf));
1574         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1575                         __func__,
1576                         (unsigned long long)readdir->cookie,
1577                         verf[0], verf[1],
1578                         attrs[0] & readdir->bitmask[0],
1579                         attrs[1] & readdir->bitmask[1]);
1580 }
1581
1582 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1583 {
1584         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1585 }
1586
1587 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1588 {
1589         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1590         encode_string(xdr, name->len, name->name);
1591 }
1592
1593 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1594 {
1595         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1596         encode_string(xdr, oldname->len, oldname->name);
1597         encode_string(xdr, newname->len, newname->name);
1598 }
1599
1600 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1601                          struct compound_hdr *hdr)
1602 {
1603         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1604         encode_uint64(xdr, clid);
1605 }
1606
1607 static void
1608 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1609 {
1610         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1611 }
1612
1613 static void
1614 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1615 {
1616         __be32 *p;
1617
1618         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1619         encode_nfs4_stateid(xdr, &zero_stateid);
1620         p = reserve_space(xdr, 2*4);
1621         *p++ = cpu_to_be32(1);
1622         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1623         p = reserve_space(xdr, 4);
1624         *p = cpu_to_be32(arg->acl_len);
1625         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1626 }
1627
1628 static void
1629 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1630 {
1631         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1632 }
1633
1634 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1635 {
1636         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1637         encode_nfs4_stateid(xdr, &arg->stateid);
1638         encode_attrs(xdr, arg->iap, server);
1639 }
1640
1641 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1642 {
1643         __be32 *p;
1644
1645         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1646         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1647
1648         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1649         p = reserve_space(xdr, 4);
1650         *p = cpu_to_be32(setclientid->sc_prog);
1651         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1652         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1653         p = reserve_space(xdr, 4);
1654         *p = cpu_to_be32(setclientid->sc_cb_ident);
1655 }
1656
1657 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1658 {
1659         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1660                         decode_setclientid_confirm_maxsz, hdr);
1661         encode_uint64(xdr, arg->clientid);
1662         encode_nfs4_verifier(xdr, &arg->confirm);
1663 }
1664
1665 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1666 {
1667         __be32 *p;
1668
1669         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1670         encode_open_stateid(xdr, args->context, args->lock_context,
1671                         FMODE_WRITE, hdr->minorversion);
1672
1673         p = reserve_space(xdr, 16);
1674         p = xdr_encode_hyper(p, args->offset);
1675         *p++ = cpu_to_be32(args->stable);
1676         *p = cpu_to_be32(args->count);
1677
1678         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1679 }
1680
1681 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1682 {
1683         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1684         encode_nfs4_stateid(xdr, stateid);
1685 }
1686
1687 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1688 {
1689         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1690         encode_string(xdr, name->len, name->name);
1691 }
1692
1693 #if defined(CONFIG_NFS_V4_1)
1694 /* NFSv4.1 operations */
1695 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1696                                    struct nfs4_session *session,
1697                                    struct compound_hdr *hdr)
1698 {
1699         __be32 *p;
1700
1701         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1702                 decode_bind_conn_to_session_maxsz, hdr);
1703         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1704         p = xdr_reserve_space(xdr, 8);
1705         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1706         *p = 0; /* use_conn_in_rdma_mode = False */
1707 }
1708
1709 static void encode_exchange_id(struct xdr_stream *xdr,
1710                                struct nfs41_exchange_id_args *args,
1711                                struct compound_hdr *hdr)
1712 {
1713         __be32 *p;
1714         char impl_name[NFS4_OPAQUE_LIMIT];
1715         int len = 0;
1716
1717         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1718         encode_nfs4_verifier(xdr, args->verifier);
1719
1720         encode_string(xdr, args->id_len, args->id);
1721
1722         p = reserve_space(xdr, 12);
1723         *p++ = cpu_to_be32(args->flags);
1724         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1725
1726         if (send_implementation_id &&
1727             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1728             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1729                 <= NFS4_OPAQUE_LIMIT + 1)
1730                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1731                                utsname()->sysname, utsname()->release,
1732                                utsname()->version, utsname()->machine);
1733
1734         if (len > 0) {
1735                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1736
1737                 encode_string(xdr,
1738                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1739                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1740                 encode_string(xdr, len, impl_name);
1741                 /* just send zeros for nii_date - the date is in nii_name */
1742                 p = reserve_space(xdr, 12);
1743                 p = xdr_encode_hyper(p, 0);
1744                 *p = cpu_to_be32(0);
1745         } else
1746                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1747 }
1748
1749 static void encode_create_session(struct xdr_stream *xdr,
1750                                   struct nfs41_create_session_args *args,
1751                                   struct compound_hdr *hdr)
1752 {
1753         __be32 *p;
1754         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1755         uint32_t len;
1756         struct nfs_client *clp = args->client;
1757         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1758         u32 max_resp_sz_cached;
1759
1760         /*
1761          * Assumes OPEN is the biggest non-idempotent compound.
1762          * 2 is the verifier.
1763          */
1764         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1765                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1766
1767         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1768                         clp->cl_ipaddr);
1769
1770         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1771         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1772         p = xdr_encode_hyper(p, clp->cl_clientid);
1773         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1774         *p++ = cpu_to_be32(args->flags);                        /*flags */
1775
1776         /* Fore Channel */
1777         *p++ = cpu_to_be32(0);                          /* header padding size */
1778         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1779         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1780         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1781         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1782         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1783         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1784
1785         /* Back Channel */
1786         *p++ = cpu_to_be32(0);                          /* header padding size */
1787         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1788         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1789         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1790         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1791         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1792         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1793
1794         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1795         *p++ = cpu_to_be32(1);
1796         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1797
1798         /* authsys_parms rfc1831 */
1799         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1800         p = xdr_encode_opaque(p, machine_name, len);
1801         *p++ = cpu_to_be32(0);                          /* UID */
1802         *p++ = cpu_to_be32(0);                          /* GID */
1803         *p = cpu_to_be32(0);                            /* No more gids */
1804 }
1805
1806 static void encode_destroy_session(struct xdr_stream *xdr,
1807                                    struct nfs4_session *session,
1808                                    struct compound_hdr *hdr)
1809 {
1810         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1811         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1812 }
1813
1814 static void encode_destroy_clientid(struct xdr_stream *xdr,
1815                                    uint64_t clientid,
1816                                    struct compound_hdr *hdr)
1817 {
1818         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1819         encode_uint64(xdr, clientid);
1820 }
1821
1822 static void encode_reclaim_complete(struct xdr_stream *xdr,
1823                                     struct nfs41_reclaim_complete_args *args,
1824                                     struct compound_hdr *hdr)
1825 {
1826         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1827         encode_uint32(xdr, args->one_fs);
1828 }
1829 #endif /* CONFIG_NFS_V4_1 */
1830
1831 static void encode_sequence(struct xdr_stream *xdr,
1832                             const struct nfs4_sequence_args *args,
1833                             struct compound_hdr *hdr)
1834 {
1835 #if defined(CONFIG_NFS_V4_1)
1836         struct nfs4_session *session = args->sa_session;
1837         struct nfs4_slot_table *tp;
1838         struct nfs4_slot *slot;
1839         __be32 *p;
1840
1841         if (!session)
1842                 return;
1843
1844         tp = &session->fc_slot_table;
1845
1846         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1847         slot = tp->slots + args->sa_slotid;
1848
1849         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1850
1851         /*
1852          * Sessionid + seqid + slotid + max slotid + cache_this
1853          */
1854         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1855                 "max_slotid=%d cache_this=%d\n",
1856                 __func__,
1857                 ((u32 *)session->sess_id.data)[0],
1858                 ((u32 *)session->sess_id.data)[1],
1859                 ((u32 *)session->sess_id.data)[2],
1860                 ((u32 *)session->sess_id.data)[3],
1861                 slot->seq_nr, args->sa_slotid,
1862                 tp->highest_used_slotid, args->sa_cache_this);
1863         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1864         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1865         *p++ = cpu_to_be32(slot->seq_nr);
1866         *p++ = cpu_to_be32(args->sa_slotid);
1867         *p++ = cpu_to_be32(tp->highest_used_slotid);
1868         *p = cpu_to_be32(args->sa_cache_this);
1869 #endif /* CONFIG_NFS_V4_1 */
1870 }
1871
1872 #ifdef CONFIG_NFS_V4_1
1873 static void
1874 encode_getdevicelist(struct xdr_stream *xdr,
1875                      const struct nfs4_getdevicelist_args *args,
1876                      struct compound_hdr *hdr)
1877 {
1878         __be32 *p;
1879         nfs4_verifier dummy = {
1880                 .data = "dummmmmy",
1881         };
1882
1883         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1884         p = reserve_space(xdr, 16);
1885         *p++ = cpu_to_be32(args->layoutclass);
1886         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1887         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1888         encode_nfs4_verifier(xdr, &dummy);
1889 }
1890
1891 static void
1892 encode_getdeviceinfo(struct xdr_stream *xdr,
1893                      const struct nfs4_getdeviceinfo_args *args,
1894                      struct compound_hdr *hdr)
1895 {
1896         __be32 *p;
1897
1898         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1899         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1900         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1901                                     NFS4_DEVICEID4_SIZE);
1902         *p++ = cpu_to_be32(args->pdev->layout_type);
1903         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1904         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1905 }
1906
1907 static void
1908 encode_layoutget(struct xdr_stream *xdr,
1909                       const struct nfs4_layoutget_args *args,
1910                       struct compound_hdr *hdr)
1911 {
1912         __be32 *p;
1913
1914         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1915         p = reserve_space(xdr, 36);
1916         *p++ = cpu_to_be32(0);     /* Signal layout available */
1917         *p++ = cpu_to_be32(args->type);
1918         *p++ = cpu_to_be32(args->range.iomode);
1919         p = xdr_encode_hyper(p, args->range.offset);
1920         p = xdr_encode_hyper(p, args->range.length);
1921         p = xdr_encode_hyper(p, args->minlength);
1922         encode_nfs4_stateid(xdr, &args->stateid);
1923         encode_uint32(xdr, args->maxcount);
1924
1925         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1926                 __func__,
1927                 args->type,
1928                 args->range.iomode,
1929                 (unsigned long)args->range.offset,
1930                 (unsigned long)args->range.length,
1931                 args->maxcount);
1932 }
1933
1934 static int
1935 encode_layoutcommit(struct xdr_stream *xdr,
1936                     struct inode *inode,
1937                     const struct nfs4_layoutcommit_args *args,
1938                     struct compound_hdr *hdr)
1939 {
1940         __be32 *p;
1941
1942         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1943                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1944
1945         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1946         p = reserve_space(xdr, 20);
1947         /* Only whole file layouts */
1948         p = xdr_encode_hyper(p, 0); /* offset */
1949         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1950         *p = cpu_to_be32(0); /* reclaim */
1951         encode_nfs4_stateid(xdr, &args->stateid);
1952         p = reserve_space(xdr, 20);
1953         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1954         p = xdr_encode_hyper(p, args->lastbytewritten);
1955         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1956         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1957
1958         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1959                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1960                         NFS_I(inode)->layout, xdr, args);
1961         else
1962                 encode_uint32(xdr, 0); /* no layout-type payload */
1963
1964         return 0;
1965 }
1966
1967 static void
1968 encode_layoutreturn(struct xdr_stream *xdr,
1969                     const struct nfs4_layoutreturn_args *args,
1970                     struct compound_hdr *hdr)
1971 {
1972         __be32 *p;
1973
1974         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1975         p = reserve_space(xdr, 16);
1976         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1977         *p++ = cpu_to_be32(args->layout_type);
1978         *p++ = cpu_to_be32(IOMODE_ANY);
1979         *p = cpu_to_be32(RETURN_FILE);
1980         p = reserve_space(xdr, 16);
1981         p = xdr_encode_hyper(p, 0);
1982         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1983         spin_lock(&args->inode->i_lock);
1984         encode_nfs4_stateid(xdr, &args->stateid);
1985         spin_unlock(&args->inode->i_lock);
1986         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1987                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1988                         NFS_I(args->inode)->layout, xdr, args);
1989         } else
1990                 encode_uint32(xdr, 0);
1991 }
1992
1993 static int
1994 encode_secinfo_no_name(struct xdr_stream *xdr,
1995                        const struct nfs41_secinfo_no_name_args *args,
1996                        struct compound_hdr *hdr)
1997 {
1998         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1999         encode_uint32(xdr, args->style);
2000         return 0;
2001 }
2002
2003 static void encode_test_stateid(struct xdr_stream *xdr,
2004                                 struct nfs41_test_stateid_args *args,
2005                                 struct compound_hdr *hdr)
2006 {
2007         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2008         encode_uint32(xdr, 1);
2009         encode_nfs4_stateid(xdr, args->stateid);
2010 }
2011
2012 static void encode_free_stateid(struct xdr_stream *xdr,
2013                                 struct nfs41_free_stateid_args *args,
2014                                 struct compound_hdr *hdr)
2015 {
2016         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2017         encode_nfs4_stateid(xdr, args->stateid);
2018 }
2019 #endif /* CONFIG_NFS_V4_1 */
2020
2021 /*
2022  * END OF "GENERIC" ENCODE ROUTINES.
2023  */
2024
2025 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2026 {
2027 #if defined(CONFIG_NFS_V4_1)
2028         if (args->sa_session)
2029                 return args->sa_session->clp->cl_mvops->minor_version;
2030 #endif /* CONFIG_NFS_V4_1 */
2031         return 0;
2032 }
2033
2034 /*
2035  * Encode an ACCESS request
2036  */
2037 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2038                                 const struct nfs4_accessargs *args)
2039 {
2040         struct compound_hdr hdr = {
2041                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2042         };
2043
2044         encode_compound_hdr(xdr, req, &hdr);
2045         encode_sequence(xdr, &args->seq_args, &hdr);
2046         encode_putfh(xdr, args->fh, &hdr);
2047         encode_access(xdr, args->access, &hdr);
2048         encode_getfattr(xdr, args->bitmask, &hdr);
2049         encode_nops(&hdr);
2050 }
2051
2052 /*
2053  * Encode LOOKUP request
2054  */
2055 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2056                                 const struct nfs4_lookup_arg *args)
2057 {
2058         struct compound_hdr hdr = {
2059                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2060         };
2061
2062         encode_compound_hdr(xdr, req, &hdr);
2063         encode_sequence(xdr, &args->seq_args, &hdr);
2064         encode_putfh(xdr, args->dir_fh, &hdr);
2065         encode_lookup(xdr, args->name, &hdr);
2066         encode_getfh(xdr, &hdr);
2067         encode_getfattr(xdr, args->bitmask, &hdr);
2068         encode_nops(&hdr);
2069 }
2070
2071 /*
2072  * Encode LOOKUP_ROOT request
2073  */
2074 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2075                                      struct xdr_stream *xdr,
2076                                      const struct nfs4_lookup_root_arg *args)
2077 {
2078         struct compound_hdr hdr = {
2079                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2080         };
2081
2082         encode_compound_hdr(xdr, req, &hdr);
2083         encode_sequence(xdr, &args->seq_args, &hdr);
2084         encode_putrootfh(xdr, &hdr);
2085         encode_getfh(xdr, &hdr);
2086         encode_getfattr(xdr, args->bitmask, &hdr);
2087         encode_nops(&hdr);
2088 }
2089
2090 /*
2091  * Encode REMOVE request
2092  */
2093 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2094                                 const struct nfs_removeargs *args)
2095 {
2096         struct compound_hdr hdr = {
2097                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2098         };
2099
2100         encode_compound_hdr(xdr, req, &hdr);
2101         encode_sequence(xdr, &args->seq_args, &hdr);
2102         encode_putfh(xdr, args->fh, &hdr);
2103         encode_remove(xdr, &args->name, &hdr);
2104         encode_nops(&hdr);
2105 }
2106
2107 /*
2108  * Encode RENAME request
2109  */
2110 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2111                                 const struct nfs_renameargs *args)
2112 {
2113         struct compound_hdr hdr = {
2114                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2115         };
2116
2117         encode_compound_hdr(xdr, req, &hdr);
2118         encode_sequence(xdr, &args->seq_args, &hdr);
2119         encode_putfh(xdr, args->old_dir, &hdr);
2120         encode_savefh(xdr, &hdr);
2121         encode_putfh(xdr, args->new_dir, &hdr);
2122         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2123         encode_nops(&hdr);
2124 }
2125
2126 /*
2127  * Encode LINK request
2128  */
2129 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2130                              const struct nfs4_link_arg *args)
2131 {
2132         struct compound_hdr hdr = {
2133                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2134         };
2135
2136         encode_compound_hdr(xdr, req, &hdr);
2137         encode_sequence(xdr, &args->seq_args, &hdr);
2138         encode_putfh(xdr, args->fh, &hdr);
2139         encode_savefh(xdr, &hdr);
2140         encode_putfh(xdr, args->dir_fh, &hdr);
2141         encode_link(xdr, args->name, &hdr);
2142         encode_restorefh(xdr, &hdr);
2143         encode_getfattr(xdr, args->bitmask, &hdr);
2144         encode_nops(&hdr);
2145 }
2146
2147 /*
2148  * Encode CREATE request
2149  */
2150 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2151                                 const struct nfs4_create_arg *args)
2152 {
2153         struct compound_hdr hdr = {
2154                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155         };
2156
2157         encode_compound_hdr(xdr, req, &hdr);
2158         encode_sequence(xdr, &args->seq_args, &hdr);
2159         encode_putfh(xdr, args->dir_fh, &hdr);
2160         encode_create(xdr, args, &hdr);
2161         encode_getfh(xdr, &hdr);
2162         encode_getfattr(xdr, args->bitmask, &hdr);
2163         encode_nops(&hdr);
2164 }
2165
2166 /*
2167  * Encode SYMLINK request
2168  */
2169 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2170                                  const struct nfs4_create_arg *args)
2171 {
2172         nfs4_xdr_enc_create(req, xdr, args);
2173 }
2174
2175 /*
2176  * Encode GETATTR request
2177  */
2178 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2179                                  const struct nfs4_getattr_arg *args)
2180 {
2181         struct compound_hdr hdr = {
2182                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2183         };
2184
2185         encode_compound_hdr(xdr, req, &hdr);
2186         encode_sequence(xdr, &args->seq_args, &hdr);
2187         encode_putfh(xdr, args->fh, &hdr);
2188         encode_getfattr(xdr, args->bitmask, &hdr);
2189         encode_nops(&hdr);
2190 }
2191
2192 /*
2193  * Encode a CLOSE request
2194  */
2195 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2196                                struct nfs_closeargs *args)
2197 {
2198         struct compound_hdr hdr = {
2199                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2200         };
2201
2202         encode_compound_hdr(xdr, req, &hdr);
2203         encode_sequence(xdr, &args->seq_args, &hdr);
2204         encode_putfh(xdr, args->fh, &hdr);
2205         encode_close(xdr, args, &hdr);
2206         encode_getfattr(xdr, args->bitmask, &hdr);
2207         encode_nops(&hdr);
2208 }
2209
2210 /*
2211  * Encode an OPEN request
2212  */
2213 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2214                               struct nfs_openargs *args)
2215 {
2216         struct compound_hdr hdr = {
2217                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218         };
2219
2220         encode_compound_hdr(xdr, req, &hdr);
2221         encode_sequence(xdr, &args->seq_args, &hdr);
2222         encode_putfh(xdr, args->fh, &hdr);
2223         encode_open(xdr, args, &hdr);
2224         encode_getfh(xdr, &hdr);
2225         if (args->access)
2226                 encode_access(xdr, args->access, &hdr);
2227         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2228         encode_nops(&hdr);
2229 }
2230
2231 /*
2232  * Encode an OPEN_CONFIRM request
2233  */
2234 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2235                                       struct xdr_stream *xdr,
2236                                       struct nfs_open_confirmargs *args)
2237 {
2238         struct compound_hdr hdr = {
2239                 .nops   = 0,
2240         };
2241
2242         encode_compound_hdr(xdr, req, &hdr);
2243         encode_putfh(xdr, args->fh, &hdr);
2244         encode_open_confirm(xdr, args, &hdr);
2245         encode_nops(&hdr);
2246 }
2247
2248 /*
2249  * Encode an OPEN request with no attributes.
2250  */
2251 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2252                                      struct xdr_stream *xdr,
2253                                      struct nfs_openargs *args)
2254 {
2255         struct compound_hdr hdr = {
2256                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2257         };
2258
2259         encode_compound_hdr(xdr, req, &hdr);
2260         encode_sequence(xdr, &args->seq_args, &hdr);
2261         encode_putfh(xdr, args->fh, &hdr);
2262         encode_open(xdr, args, &hdr);
2263         if (args->access)
2264                 encode_access(xdr, args->access, &hdr);
2265         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2266         encode_nops(&hdr);
2267 }
2268
2269 /*
2270  * Encode an OPEN_DOWNGRADE request
2271  */
2272 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2273                                         struct xdr_stream *xdr,
2274                                         struct nfs_closeargs *args)
2275 {
2276         struct compound_hdr hdr = {
2277                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2278         };
2279
2280         encode_compound_hdr(xdr, req, &hdr);
2281         encode_sequence(xdr, &args->seq_args, &hdr);
2282         encode_putfh(xdr, args->fh, &hdr);
2283         encode_open_downgrade(xdr, args, &hdr);
2284         encode_getfattr(xdr, args->bitmask, &hdr);
2285         encode_nops(&hdr);
2286 }
2287
2288 /*
2289  * Encode a LOCK request
2290  */
2291 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2292                               struct nfs_lock_args *args)
2293 {
2294         struct compound_hdr hdr = {
2295                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2296         };
2297
2298         encode_compound_hdr(xdr, req, &hdr);
2299         encode_sequence(xdr, &args->seq_args, &hdr);
2300         encode_putfh(xdr, args->fh, &hdr);
2301         encode_lock(xdr, args, &hdr);
2302         encode_nops(&hdr);
2303 }
2304
2305 /*
2306  * Encode a LOCKT request
2307  */
2308 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2309                                struct nfs_lockt_args *args)
2310 {
2311         struct compound_hdr hdr = {
2312                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2313         };
2314
2315         encode_compound_hdr(xdr, req, &hdr);
2316         encode_sequence(xdr, &args->seq_args, &hdr);
2317         encode_putfh(xdr, args->fh, &hdr);
2318         encode_lockt(xdr, args, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode a LOCKU request
2324  */
2325 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2326                                struct nfs_locku_args *args)
2327 {
2328         struct compound_hdr hdr = {
2329                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2330         };
2331
2332         encode_compound_hdr(xdr, req, &hdr);
2333         encode_sequence(xdr, &args->seq_args, &hdr);
2334         encode_putfh(xdr, args->fh, &hdr);
2335         encode_locku(xdr, args, &hdr);
2336         encode_nops(&hdr);
2337 }
2338
2339 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2340                                            struct xdr_stream *xdr,
2341                                         struct nfs_release_lockowner_args *args)
2342 {
2343         struct compound_hdr hdr = {
2344                 .minorversion = 0,
2345         };
2346
2347         encode_compound_hdr(xdr, req, &hdr);
2348         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2349         encode_nops(&hdr);
2350 }
2351
2352 /*
2353  * Encode a READLINK request
2354  */
2355 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2356                                   const struct nfs4_readlink *args)
2357 {
2358         struct compound_hdr hdr = {
2359                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2360         };
2361
2362         encode_compound_hdr(xdr, req, &hdr);
2363         encode_sequence(xdr, &args->seq_args, &hdr);
2364         encode_putfh(xdr, args->fh, &hdr);
2365         encode_readlink(xdr, args, req, &hdr);
2366
2367         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2368                         args->pgbase, args->pglen);
2369         encode_nops(&hdr);
2370 }
2371
2372 /*
2373  * Encode a READDIR request
2374  */
2375 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2376                                  const struct nfs4_readdir_arg *args)
2377 {
2378         struct compound_hdr hdr = {
2379                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2380         };
2381
2382         encode_compound_hdr(xdr, req, &hdr);
2383         encode_sequence(xdr, &args->seq_args, &hdr);
2384         encode_putfh(xdr, args->fh, &hdr);
2385         encode_readdir(xdr, args, req, &hdr);
2386
2387         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2388                          args->pgbase, args->count);
2389         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2390                         __func__, hdr.replen << 2, args->pages,
2391                         args->pgbase, args->count);
2392         encode_nops(&hdr);
2393 }
2394
2395 /*
2396  * Encode a READ request
2397  */
2398 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2399                               struct nfs_readargs *args)
2400 {
2401         struct compound_hdr hdr = {
2402                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2403         };
2404
2405         encode_compound_hdr(xdr, req, &hdr);
2406         encode_sequence(xdr, &args->seq_args, &hdr);
2407         encode_putfh(xdr, args->fh, &hdr);
2408         encode_read(xdr, args, &hdr);
2409
2410         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2411                          args->pages, args->pgbase, args->count);
2412         req->rq_rcv_buf.flags |= XDRBUF_READ;
2413         encode_nops(&hdr);
2414 }
2415
2416 /*
2417  * Encode an SETATTR request
2418  */
2419 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2420                                  struct nfs_setattrargs *args)
2421 {
2422         struct compound_hdr hdr = {
2423                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2424         };
2425
2426         encode_compound_hdr(xdr, req, &hdr);
2427         encode_sequence(xdr, &args->seq_args, &hdr);
2428         encode_putfh(xdr, args->fh, &hdr);
2429         encode_setattr(xdr, args, args->server, &hdr);
2430         encode_getfattr(xdr, args->bitmask, &hdr);
2431         encode_nops(&hdr);
2432 }
2433
2434 /*
2435  * Encode a GETACL request
2436  */
2437 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2438                                 struct nfs_getaclargs *args)
2439 {
2440         struct compound_hdr hdr = {
2441                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2442         };
2443         uint32_t replen;
2444
2445         encode_compound_hdr(xdr, req, &hdr);
2446         encode_sequence(xdr, &args->seq_args, &hdr);
2447         encode_putfh(xdr, args->fh, &hdr);
2448         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2449         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2450
2451         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2452                 args->acl_pages, args->acl_pgbase, args->acl_len);
2453
2454         encode_nops(&hdr);
2455 }
2456
2457 /*
2458  * Encode a WRITE request
2459  */
2460 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2461                                struct nfs_writeargs *args)
2462 {
2463         struct compound_hdr hdr = {
2464                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2465         };
2466
2467         encode_compound_hdr(xdr, req, &hdr);
2468         encode_sequence(xdr, &args->seq_args, &hdr);
2469         encode_putfh(xdr, args->fh, &hdr);
2470         encode_write(xdr, args, &hdr);
2471         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2472         if (args->bitmask)
2473                 encode_getfattr(xdr, args->bitmask, &hdr);
2474         encode_nops(&hdr);
2475 }
2476
2477 /*
2478  *  a COMMIT request
2479  */
2480 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2481                                 struct nfs_commitargs *args)
2482 {
2483         struct compound_hdr hdr = {
2484                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2485         };
2486
2487         encode_compound_hdr(xdr, req, &hdr);
2488         encode_sequence(xdr, &args->seq_args, &hdr);
2489         encode_putfh(xdr, args->fh, &hdr);
2490         encode_commit(xdr, args, &hdr);
2491         encode_nops(&hdr);
2492 }
2493
2494 /*
2495  * FSINFO request
2496  */
2497 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2498                                 struct nfs4_fsinfo_arg *args)
2499 {
2500         struct compound_hdr hdr = {
2501                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2502         };
2503
2504         encode_compound_hdr(xdr, req, &hdr);
2505         encode_sequence(xdr, &args->seq_args, &hdr);
2506         encode_putfh(xdr, args->fh, &hdr);
2507         encode_fsinfo(xdr, args->bitmask, &hdr);
2508         encode_nops(&hdr);
2509 }
2510
2511 /*
2512  * a PATHCONF request
2513  */
2514 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2515                                   const struct nfs4_pathconf_arg *args)
2516 {
2517         struct compound_hdr hdr = {
2518                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2519         };
2520
2521         encode_compound_hdr(xdr, req, &hdr);
2522         encode_sequence(xdr, &args->seq_args, &hdr);
2523         encode_putfh(xdr, args->fh, &hdr);
2524         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2525                            &hdr);
2526         encode_nops(&hdr);
2527 }
2528
2529 /*
2530  * a STATFS request
2531  */
2532 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2533                                 const struct nfs4_statfs_arg *args)
2534 {
2535         struct compound_hdr hdr = {
2536                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2537         };
2538
2539         encode_compound_hdr(xdr, req, &hdr);
2540         encode_sequence(xdr, &args->seq_args, &hdr);
2541         encode_putfh(xdr, args->fh, &hdr);
2542         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2543                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2544         encode_nops(&hdr);
2545 }
2546
2547 /*
2548  * GETATTR_BITMAP request
2549  */
2550 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2551                                      struct xdr_stream *xdr,
2552                                      struct nfs4_server_caps_arg *args)
2553 {
2554         struct compound_hdr hdr = {
2555                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2556         };
2557
2558         encode_compound_hdr(xdr, req, &hdr);
2559         encode_sequence(xdr, &args->seq_args, &hdr);
2560         encode_putfh(xdr, args->fhandle, &hdr);
2561         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2562                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2563                            FATTR4_WORD0_LINK_SUPPORT|
2564                            FATTR4_WORD0_SYMLINK_SUPPORT|
2565                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2566         encode_nops(&hdr);
2567 }
2568
2569 /*
2570  * a RENEW request
2571  */
2572 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2573                                struct nfs_client *clp)
2574 {
2575         struct compound_hdr hdr = {
2576                 .nops   = 0,
2577         };
2578
2579         encode_compound_hdr(xdr, req, &hdr);
2580         encode_renew(xdr, clp->cl_clientid, &hdr);
2581         encode_nops(&hdr);
2582 }
2583
2584 /*
2585  * a SETCLIENTID request
2586  */
2587 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2588                                      struct xdr_stream *xdr,
2589                                      struct nfs4_setclientid *sc)
2590 {
2591         struct compound_hdr hdr = {
2592                 .nops   = 0,
2593         };
2594
2595         encode_compound_hdr(xdr, req, &hdr);
2596         encode_setclientid(xdr, sc, &hdr);
2597         encode_nops(&hdr);
2598 }
2599
2600 /*
2601  * a SETCLIENTID_CONFIRM request
2602  */
2603 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2604                                              struct xdr_stream *xdr,
2605                                              struct nfs4_setclientid_res *arg)
2606 {
2607         struct compound_hdr hdr = {
2608                 .nops   = 0,
2609         };
2610         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2611
2612         encode_compound_hdr(xdr, req, &hdr);
2613         encode_setclientid_confirm(xdr, arg, &hdr);
2614         encode_putrootfh(xdr, &hdr);
2615         encode_fsinfo(xdr, lease_bitmap, &hdr);
2616         encode_nops(&hdr);
2617 }
2618
2619 /*
2620  * DELEGRETURN request
2621  */
2622 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2623                                      struct xdr_stream *xdr,
2624                                      const struct nfs4_delegreturnargs *args)
2625 {
2626         struct compound_hdr hdr = {
2627                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2628         };
2629
2630         encode_compound_hdr(xdr, req, &hdr);
2631         encode_sequence(xdr, &args->seq_args, &hdr);
2632         encode_putfh(xdr, args->fhandle, &hdr);
2633         encode_getfattr(xdr, args->bitmask, &hdr);
2634         encode_delegreturn(xdr, args->stateid, &hdr);
2635         encode_nops(&hdr);
2636 }
2637
2638 /*
2639  * Encode FS_LOCATIONS request
2640  */
2641 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2642                                       struct xdr_stream *xdr,
2643                                       struct nfs4_fs_locations_arg *args)
2644 {
2645         struct compound_hdr hdr = {
2646                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2647         };
2648         uint32_t replen;
2649
2650         encode_compound_hdr(xdr, req, &hdr);
2651         encode_sequence(xdr, &args->seq_args, &hdr);
2652         encode_putfh(xdr, args->dir_fh, &hdr);
2653         encode_lookup(xdr, args->name, &hdr);
2654         replen = hdr.replen;    /* get the attribute into args->page */
2655         encode_fs_locations(xdr, args->bitmask, &hdr);
2656
2657         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2658                         0, PAGE_SIZE);
2659         encode_nops(&hdr);
2660 }
2661
2662 /*
2663  * Encode SECINFO request
2664  */
2665 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2666                                 struct xdr_stream *xdr,
2667                                 struct nfs4_secinfo_arg *args)
2668 {
2669         struct compound_hdr hdr = {
2670                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2671         };
2672
2673         encode_compound_hdr(xdr, req, &hdr);
2674         encode_sequence(xdr, &args->seq_args, &hdr);
2675         encode_putfh(xdr, args->dir_fh, &hdr);
2676         encode_secinfo(xdr, args->name, &hdr);
2677         encode_nops(&hdr);
2678 }
2679
2680 #if defined(CONFIG_NFS_V4_1)
2681 /*
2682  * BIND_CONN_TO_SESSION request
2683  */
2684 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2685                                 struct xdr_stream *xdr,
2686                                 struct nfs_client *clp)
2687 {
2688         struct compound_hdr hdr = {
2689                 .minorversion = clp->cl_mvops->minor_version,
2690         };
2691
2692         encode_compound_hdr(xdr, req, &hdr);
2693         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2694         encode_nops(&hdr);
2695 }
2696
2697 /*
2698  * EXCHANGE_ID request
2699  */
2700 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2701                                      struct xdr_stream *xdr,
2702                                      struct nfs41_exchange_id_args *args)
2703 {
2704         struct compound_hdr hdr = {
2705                 .minorversion = args->client->cl_mvops->minor_version,
2706         };
2707
2708         encode_compound_hdr(xdr, req, &hdr);
2709         encode_exchange_id(xdr, args, &hdr);
2710         encode_nops(&hdr);
2711 }
2712
2713 /*
2714  * a CREATE_SESSION request
2715  */
2716 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2717                                         struct xdr_stream *xdr,
2718                                         struct nfs41_create_session_args *args)
2719 {
2720         struct compound_hdr hdr = {
2721                 .minorversion = args->client->cl_mvops->minor_version,
2722         };
2723
2724         encode_compound_hdr(xdr, req, &hdr);
2725         encode_create_session(xdr, args, &hdr);
2726         encode_nops(&hdr);
2727 }
2728
2729 /*
2730  * a DESTROY_SESSION request
2731  */
2732 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2733                                          struct xdr_stream *xdr,
2734                                          struct nfs4_session *session)
2735 {
2736         struct compound_hdr hdr = {
2737                 .minorversion = session->clp->cl_mvops->minor_version,
2738         };
2739
2740         encode_compound_hdr(xdr, req, &hdr);
2741         encode_destroy_session(xdr, session, &hdr);
2742         encode_nops(&hdr);
2743 }
2744
2745 /*
2746  * a DESTROY_CLIENTID request
2747  */
2748 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2749                                          struct xdr_stream *xdr,
2750                                          struct nfs_client *clp)
2751 {
2752         struct compound_hdr hdr = {
2753                 .minorversion = clp->cl_mvops->minor_version,
2754         };
2755
2756         encode_compound_hdr(xdr, req, &hdr);
2757         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2758         encode_nops(&hdr);
2759 }
2760
2761 /*
2762  * a SEQUENCE request
2763  */
2764 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2765                                   struct nfs4_sequence_args *args)
2766 {
2767         struct compound_hdr hdr = {
2768                 .minorversion = nfs4_xdr_minorversion(args),
2769         };
2770
2771         encode_compound_hdr(xdr, req, &hdr);
2772         encode_sequence(xdr, args, &hdr);
2773         encode_nops(&hdr);
2774 }
2775
2776 /*
2777  * a GET_LEASE_TIME request
2778  */
2779 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2780                                         struct xdr_stream *xdr,
2781                                         struct nfs4_get_lease_time_args *args)
2782 {
2783         struct compound_hdr hdr = {
2784                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2785         };
2786         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2787
2788         encode_compound_hdr(xdr, req, &hdr);
2789         encode_sequence(xdr, &args->la_seq_args, &hdr);
2790         encode_putrootfh(xdr, &hdr);
2791         encode_fsinfo(xdr, lease_bitmap, &hdr);
2792         encode_nops(&hdr);
2793 }
2794
2795 /*
2796  * a RECLAIM_COMPLETE request
2797  */
2798 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2799                                           struct xdr_stream *xdr,
2800                                 struct nfs41_reclaim_complete_args *args)
2801 {
2802         struct compound_hdr hdr = {
2803                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2804         };
2805
2806         encode_compound_hdr(xdr, req, &hdr);
2807         encode_sequence(xdr, &args->seq_args, &hdr);
2808         encode_reclaim_complete(xdr, args, &hdr);
2809         encode_nops(&hdr);
2810 }
2811
2812 /*
2813  * Encode GETDEVICELIST request
2814  */
2815 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2816                                        struct xdr_stream *xdr,
2817                                        struct nfs4_getdevicelist_args *args)
2818 {
2819         struct compound_hdr hdr = {
2820                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2821         };
2822
2823         encode_compound_hdr(xdr, req, &hdr);
2824         encode_sequence(xdr, &args->seq_args, &hdr);
2825         encode_putfh(xdr, args->fh, &hdr);
2826         encode_getdevicelist(xdr, args, &hdr);
2827         encode_nops(&hdr);
2828 }
2829
2830 /*
2831  * Encode GETDEVICEINFO request
2832  */
2833 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2834                                        struct xdr_stream *xdr,
2835                                        struct nfs4_getdeviceinfo_args *args)
2836 {
2837         struct compound_hdr hdr = {
2838                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2839         };
2840
2841         encode_compound_hdr(xdr, req, &hdr);
2842         encode_sequence(xdr, &args->seq_args, &hdr);
2843         encode_getdeviceinfo(xdr, args, &hdr);
2844
2845         /* set up reply kvec. Subtract notification bitmap max size (2)
2846          * so that notification bitmap is put in xdr_buf tail */
2847         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2848                          args->pdev->pages, args->pdev->pgbase,
2849                          args->pdev->pglen);
2850
2851         encode_nops(&hdr);
2852 }
2853
2854 /*
2855  *  Encode LAYOUTGET request
2856  */
2857 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2858                                    struct xdr_stream *xdr,
2859                                    struct nfs4_layoutget_args *args)
2860 {
2861         struct compound_hdr hdr = {
2862                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2863         };
2864
2865         encode_compound_hdr(xdr, req, &hdr);
2866         encode_sequence(xdr, &args->seq_args, &hdr);
2867         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2868         encode_layoutget(xdr, args, &hdr);
2869
2870         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2871             args->layout.pages, 0, args->layout.pglen);
2872
2873         encode_nops(&hdr);
2874 }
2875
2876 /*
2877  *  Encode LAYOUTCOMMIT request
2878  */
2879 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2880                                       struct xdr_stream *xdr,
2881                                       struct nfs4_layoutcommit_args *args)
2882 {
2883         struct nfs4_layoutcommit_data *data =
2884                 container_of(args, struct nfs4_layoutcommit_data, args);
2885         struct compound_hdr hdr = {
2886                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2887         };
2888
2889         encode_compound_hdr(xdr, req, &hdr);
2890         encode_sequence(xdr, &args->seq_args, &hdr);
2891         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2892         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2893         encode_getfattr(xdr, args->bitmask, &hdr);
2894         encode_nops(&hdr);
2895 }
2896
2897 /*
2898  * Encode LAYOUTRETURN request
2899  */
2900 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2901                                       struct xdr_stream *xdr,
2902                                       struct nfs4_layoutreturn_args *args)
2903 {
2904         struct compound_hdr hdr = {
2905                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2906         };
2907
2908         encode_compound_hdr(xdr, req, &hdr);
2909         encode_sequence(xdr, &args->seq_args, &hdr);
2910         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2911         encode_layoutreturn(xdr, args, &hdr);
2912         encode_nops(&hdr);
2913 }
2914
2915 /*
2916  * Encode SECINFO_NO_NAME request
2917  */
2918 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2919                                         struct xdr_stream *xdr,
2920                                         struct nfs41_secinfo_no_name_args *args)
2921 {
2922         struct compound_hdr hdr = {
2923                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2924         };
2925
2926         encode_compound_hdr(xdr, req, &hdr);
2927         encode_sequence(xdr, &args->seq_args, &hdr);
2928         encode_putrootfh(xdr, &hdr);
2929         encode_secinfo_no_name(xdr, args, &hdr);
2930         encode_nops(&hdr);
2931         return 0;
2932 }
2933
2934 /*
2935  *  Encode TEST_STATEID request
2936  */
2937 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2938                                       struct xdr_stream *xdr,
2939                                       struct nfs41_test_stateid_args *args)
2940 {
2941         struct compound_hdr hdr = {
2942                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2943         };
2944
2945         encode_compound_hdr(xdr, req, &hdr);
2946         encode_sequence(xdr, &args->seq_args, &hdr);
2947         encode_test_stateid(xdr, args, &hdr);
2948         encode_nops(&hdr);
2949 }
2950
2951 /*
2952  *  Encode FREE_STATEID request
2953  */
2954 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2955                                      struct xdr_stream *xdr,
2956                                      struct nfs41_free_stateid_args *args)
2957 {
2958         struct compound_hdr hdr = {
2959                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2960         };
2961
2962         encode_compound_hdr(xdr, req, &hdr);
2963         encode_sequence(xdr, &args->seq_args, &hdr);
2964         encode_free_stateid(xdr, args, &hdr);
2965         encode_nops(&hdr);
2966 }
2967 #endif /* CONFIG_NFS_V4_1 */
2968
2969 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2970 {
2971         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2972                 "Remaining buffer length is %tu words.\n",
2973                 func, xdr->end - xdr->p);
2974 }
2975
2976 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2977 {
2978         __be32 *p;
2979
2980         p = xdr_inline_decode(xdr, 4);
2981         if (unlikely(!p))
2982                 goto out_overflow;
2983         *len = be32_to_cpup(p);
2984         p = xdr_inline_decode(xdr, *len);
2985         if (unlikely(!p))
2986                 goto out_overflow;
2987         *string = (char *)p;
2988         return 0;
2989 out_overflow:
2990         print_overflow_msg(__func__, xdr);
2991         return -EIO;
2992 }
2993
2994 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2995 {
2996         __be32 *p;
2997
2998         p = xdr_inline_decode(xdr, 8);
2999         if (unlikely(!p))
3000                 goto out_overflow;
3001         hdr->status = be32_to_cpup(p++);
3002         hdr->taglen = be32_to_cpup(p);
3003
3004         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3005         if (unlikely(!p))
3006                 goto out_overflow;
3007         hdr->tag = (char *)p;
3008         p += XDR_QUADLEN(hdr->taglen);
3009         hdr->nops = be32_to_cpup(p);
3010         if (unlikely(hdr->nops < 1))
3011                 return nfs4_stat_to_errno(hdr->status);
3012         return 0;
3013 out_overflow:
3014         print_overflow_msg(__func__, xdr);
3015         return -EIO;
3016 }
3017
3018 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3019 {
3020         __be32 *p;
3021         uint32_t opnum;
3022         int32_t nfserr;
3023
3024         p = xdr_inline_decode(xdr, 8);
3025         if (unlikely(!p))
3026                 goto out_overflow;
3027         opnum = be32_to_cpup(p++);
3028         if (opnum != expected) {
3029                 dprintk("nfs: Server returned operation"
3030                         " %d but we issued a request for %d\n",
3031                                 opnum, expected);
3032                 return -EIO;
3033         }
3034         nfserr = be32_to_cpup(p);
3035         if (nfserr != NFS_OK)
3036                 return nfs4_stat_to_errno(nfserr);
3037         return 0;
3038 out_overflow:
3039         print_overflow_msg(__func__, xdr);
3040         return -EIO;
3041 }
3042
3043 /* Dummy routine */
3044 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3045 {
3046         __be32 *p;
3047         unsigned int strlen;
3048         char *str;
3049
3050         p = xdr_inline_decode(xdr, 12);
3051         if (likely(p))
3052                 return decode_opaque_inline(xdr, &strlen, &str);
3053         print_overflow_msg(__func__, xdr);
3054         return -EIO;
3055 }
3056
3057 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3058 {
3059         uint32_t bmlen;
3060         __be32 *p;
3061
3062         p = xdr_inline_decode(xdr, 4);
3063         if (unlikely(!p))
3064                 goto out_overflow;
3065         bmlen = be32_to_cpup(p);
3066
3067         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3068         p = xdr_inline_decode(xdr, (bmlen << 2));
3069         if (unlikely(!p))
3070                 goto out_overflow;
3071         if (bmlen > 0) {
3072                 bitmap[0] = be32_to_cpup(p++);
3073                 if (bmlen > 1) {
3074                         bitmap[1] = be32_to_cpup(p++);
3075                         if (bmlen > 2)
3076                                 bitmap[2] = be32_to_cpup(p);
3077                 }
3078         }
3079         return 0;
3080 out_overflow:
3081         print_overflow_msg(__func__, xdr);
3082         return -EIO;
3083 }
3084
3085 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3086 {
3087         __be32 *p;
3088
3089         p = xdr_inline_decode(xdr, 4);
3090         if (unlikely(!p))
3091                 goto out_overflow;
3092         *attrlen = be32_to_cpup(p);
3093         *savep = xdr_stream_pos(xdr);
3094         return 0;
3095 out_overflow:
3096         print_overflow_msg(__func__, xdr);
3097         return -EIO;
3098 }
3099
3100 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3101 {
3102         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3103                 int ret;
3104                 ret = decode_attr_bitmap(xdr, bitmask);
3105                 if (unlikely(ret < 0))
3106                         return ret;
3107                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3108         } else
3109                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3110         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3111                 bitmask[0], bitmask[1], bitmask[2]);
3112         return 0;
3113 }
3114
3115 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3116 {
3117         __be32 *p;
3118         int ret = 0;
3119
3120         *type = 0;
3121         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3122                 return -EIO;
3123         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3124                 p = xdr_inline_decode(xdr, 4);
3125                 if (unlikely(!p))
3126                         goto out_overflow;
3127                 *type = be32_to_cpup(p);
3128                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3129                         dprintk("%s: bad type %d\n", __func__, *type);
3130                         return -EIO;
3131                 }
3132                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3133                 ret = NFS_ATTR_FATTR_TYPE;
3134         }
3135         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3136         return ret;
3137 out_overflow:
3138         print_overflow_msg(__func__, xdr);
3139         return -EIO;
3140 }
3141
3142 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3143                                       uint32_t *bitmap, uint32_t *type)
3144 {
3145         __be32 *p;
3146
3147         *type = 0;
3148         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3149                 return -EIO;
3150         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3151                 p = xdr_inline_decode(xdr, 4);
3152                 if (unlikely(!p))
3153                         goto out_overflow;
3154                 *type = be32_to_cpup(p);
3155                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3156         }
3157         dprintk("%s: expire type=0x%x\n", __func__, *type);
3158         return 0;
3159 out_overflow:
3160         print_overflow_msg(__func__, xdr);
3161         return -EIO;
3162 }
3163
3164 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3165 {
3166         __be32 *p;
3167         int ret = 0;
3168
3169         *change = 0;
3170         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3171                 return -EIO;
3172         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3173                 p = xdr_inline_decode(xdr, 8);
3174                 if (unlikely(!p))
3175                         goto out_overflow;
3176                 xdr_decode_hyper(p, change);
3177                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3178                 ret = NFS_ATTR_FATTR_CHANGE;
3179         }
3180         dprintk("%s: change attribute=%Lu\n", __func__,
3181                         (unsigned long long)*change);
3182         return ret;
3183 out_overflow:
3184         print_overflow_msg(__func__, xdr);
3185         return -EIO;
3186 }
3187
3188 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3189 {
3190         __be32 *p;
3191         int ret = 0;
3192
3193         *size = 0;
3194         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3195                 return -EIO;
3196         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3197                 p = xdr_inline_decode(xdr, 8);
3198                 if (unlikely(!p))
3199                         goto out_overflow;
3200                 xdr_decode_hyper(p, size);
3201                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3202                 ret = NFS_ATTR_FATTR_SIZE;
3203         }
3204         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3205         return ret;
3206 out_overflow:
3207         print_overflow_msg(__func__, xdr);
3208         return -EIO;
3209 }
3210
3211 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3212 {
3213         __be32 *p;
3214
3215         *res = 0;
3216         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3217                 return -EIO;
3218         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3219                 p = xdr_inline_decode(xdr, 4);
3220                 if (unlikely(!p))
3221                         goto out_overflow;
3222                 *res = be32_to_cpup(p);
3223                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3224         }
3225         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3226         return 0;
3227 out_overflow:
3228         print_overflow_msg(__func__, xdr);
3229         return -EIO;
3230 }
3231
3232 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3233 {
3234         __be32 *p;
3235
3236         *res = 0;
3237         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3238                 return -EIO;
3239         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3240                 p = xdr_inline_decode(xdr, 4);
3241                 if (unlikely(!p))
3242                         goto out_overflow;
3243                 *res = be32_to_cpup(p);
3244                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3245         }
3246         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3247         return 0;
3248 out_overflow:
3249         print_overflow_msg(__func__, xdr);
3250         return -EIO;
3251 }
3252
3253 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3254 {
3255         __be32 *p;
3256         int ret = 0;
3257
3258         fsid->major = 0;
3259         fsid->minor = 0;
3260         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3261                 return -EIO;
3262         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3263                 p = xdr_inline_decode(xdr, 16);
3264                 if (unlikely(!p))
3265                         goto out_overflow;
3266                 p = xdr_decode_hyper(p, &fsid->major);
3267                 xdr_decode_hyper(p, &fsid->minor);
3268                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3269                 ret = NFS_ATTR_FATTR_FSID;
3270         }
3271         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3272                         (unsigned long long)fsid->major,
3273                         (unsigned long long)fsid->minor);
3274         return ret;
3275 out_overflow:
3276         print_overflow_msg(__func__, xdr);
3277         return -EIO;
3278 }
3279
3280 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3281 {
3282         __be32 *p;
3283
3284         *res = 60;
3285         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3286                 return -EIO;
3287         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3288                 p = xdr_inline_decode(xdr, 4);
3289                 if (unlikely(!p))
3290                         goto out_overflow;
3291                 *res = be32_to_cpup(p);
3292                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3293         }
3294         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3295         return 0;
3296 out_overflow:
3297         print_overflow_msg(__func__, xdr);
3298         return -EIO;
3299 }
3300
3301 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3302 {
3303         __be32 *p;
3304
3305         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3306                 return -EIO;
3307         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3308                 p = xdr_inline_decode(xdr, 4);
3309                 if (unlikely(!p))
3310                         goto out_overflow;
3311                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3312                 *res = -be32_to_cpup(p);
3313         }
3314         return 0;
3315 out_overflow:
3316         print_overflow_msg(__func__, xdr);
3317         return -EIO;
3318 }
3319
3320 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3321 {
3322         __be32 *p;
3323         int len;
3324
3325         if (fh != NULL)
3326                 memset(fh, 0, sizeof(*fh));
3327
3328         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3329                 return -EIO;
3330         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3331                 p = xdr_inline_decode(xdr, 4);
3332                 if (unlikely(!p))
3333                         goto out_overflow;
3334                 len = be32_to_cpup(p);
3335                 if (len > NFS4_FHSIZE)
3336                         return -EIO;
3337                 p = xdr_inline_decode(xdr, len);
3338                 if (unlikely(!p))
3339                         goto out_overflow;
3340                 if (fh != NULL) {
3341                         memcpy(fh->data, p, len);
3342                         fh->size = len;
3343                 }
3344                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3345         }
3346         return 0;
3347 out_overflow:
3348         print_overflow_msg(__func__, xdr);
3349         return -EIO;
3350 }
3351
3352 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3353 {
3354         __be32 *p;
3355
3356         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3357         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3358                 return -EIO;
3359         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3360                 p = xdr_inline_decode(xdr, 4);
3361                 if (unlikely(!p))
3362                         goto out_overflow;
3363                 *res = be32_to_cpup(p);
3364                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3365         }
3366         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3367         return 0;
3368 out_overflow:
3369         print_overflow_msg(__func__, xdr);
3370         return -EIO;
3371 }
3372
3373 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3374 {
3375         __be32 *p;
3376         int ret = 0;
3377
3378         *fileid = 0;
3379         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3380                 return -EIO;
3381         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3382                 p = xdr_inline_decode(xdr, 8);
3383                 if (unlikely(!p))
3384                         goto out_overflow;
3385                 xdr_decode_hyper(p, fileid);
3386                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3387                 ret = NFS_ATTR_FATTR_FILEID;
3388         }
3389         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3390         return ret;
3391 out_overflow:
3392         print_overflow_msg(__func__, xdr);
3393         return -EIO;
3394 }
3395
3396 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3397 {
3398         __be32 *p;
3399         int ret = 0;
3400
3401         *fileid = 0;
3402         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3403                 return -EIO;
3404         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3405                 p = xdr_inline_decode(xdr, 8);
3406                 if (unlikely(!p))
3407                         goto out_overflow;
3408                 xdr_decode_hyper(p, fileid);
3409                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3410                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3411         }
3412         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3413         return ret;
3414 out_overflow:
3415         print_overflow_msg(__func__, xdr);
3416         return -EIO;
3417 }
3418
3419 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3420 {
3421         __be32 *p;
3422         int status = 0;
3423
3424         *res = 0;
3425         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3426                 return -EIO;
3427         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3428                 p = xdr_inline_decode(xdr, 8);
3429                 if (unlikely(!p))
3430                         goto out_overflow;
3431                 xdr_decode_hyper(p, res);
3432                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3433         }
3434         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3435         return status;
3436 out_overflow:
3437         print_overflow_msg(__func__, xdr);
3438         return -EIO;
3439 }
3440
3441 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3442 {
3443         __be32 *p;
3444         int status = 0;
3445
3446         *res = 0;
3447         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3448                 return -EIO;
3449         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3450                 p = xdr_inline_decode(xdr, 8);
3451                 if (unlikely(!p))
3452                         goto out_overflow;
3453                 xdr_decode_hyper(p, res);
3454                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3455         }
3456         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3457         return status;
3458 out_overflow:
3459         print_overflow_msg(__func__, xdr);
3460         return -EIO;
3461 }
3462
3463 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3464 {
3465         __be32 *p;
3466         int status = 0;
3467
3468         *res = 0;
3469         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3470                 return -EIO;
3471         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3472                 p = xdr_inline_decode(xdr, 8);
3473                 if (unlikely(!p))
3474                         goto out_overflow;
3475                 xdr_decode_hyper(p, res);
3476                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3477         }
3478         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3479         return status;
3480 out_overflow:
3481         print_overflow_msg(__func__, xdr);
3482         return -EIO;
3483 }
3484
3485 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3486 {
3487         u32 n;
3488         __be32 *p;
3489         int status = 0;
3490
3491         p = xdr_inline_decode(xdr, 4);
3492         if (unlikely(!p))
3493                 goto out_overflow;
3494         n = be32_to_cpup(p);
3495         if (n == 0)
3496                 goto root_path;
3497         dprintk("pathname4: ");
3498         path->ncomponents = 0;
3499         while (path->ncomponents < n) {
3500                 struct nfs4_string *component = &path->components[path->ncomponents];
3501                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3502                 if (unlikely(status != 0))
3503                         goto out_eio;
3504                 ifdebug (XDR)
3505                         pr_cont("%s%.*s ",
3506                                 (path->ncomponents != n ? "/ " : ""),
3507                                 component->len, component->data);
3508                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3509                         path->ncomponents++;
3510                 else {
3511                         dprintk("cannot parse %d components in path\n", n);
3512                         goto out_eio;
3513                 }
3514         }
3515 out:
3516         return status;
3517 root_path:
3518 /* a root pathname is sent as a zero component4 */
3519         path->ncomponents = 1;
3520         path->components[0].len=0;
3521         path->components[0].data=NULL;
3522         dprintk("pathname4: /\n");
3523         goto out;
3524 out_eio:
3525         dprintk(" status %d", status);
3526         status = -EIO;
3527         goto out;
3528 out_overflow:
3529         print_overflow_msg(__func__, xdr);
3530         return -EIO;
3531 }
3532
3533 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3534 {
3535         int n;
3536         __be32 *p;
3537         int status = -EIO;
3538
3539         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3540                 goto out;
3541         status = 0;
3542         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3543                 goto out;
3544         status = -EIO;
3545         /* Ignore borken servers that return unrequested attrs */
3546         if (unlikely(res == NULL))
3547                 goto out;
3548         dprintk("%s: fsroot:\n", __func__);
3549         status = decode_pathname(xdr, &res->fs_path);
3550         if (unlikely(status != 0))
3551                 goto out;
3552         p = xdr_inline_decode(xdr, 4);
3553         if (unlikely(!p))
3554                 goto out_overflow;
3555         n = be32_to_cpup(p);
3556         if (n <= 0)
3557                 goto out_eio;
3558         res->nlocations = 0;
3559         while (res->nlocations < n) {
3560                 u32 m;
3561                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3562
3563                 p = xdr_inline_decode(xdr, 4);
3564                 if (unlikely(!p))
3565                         goto out_overflow;
3566                 m = be32_to_cpup(p);
3567
3568                 loc->nservers = 0;
3569                 dprintk("%s: servers:\n", __func__);
3570                 while (loc->nservers < m) {
3571                         struct nfs4_string *server = &loc->servers[loc->nservers];
3572                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3573                         if (unlikely(status != 0))
3574                                 goto out_eio;
3575                         dprintk("%s ", server->data);
3576                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3577                                 loc->nservers++;
3578                         else {
3579                                 unsigned int i;
3580                                 dprintk("%s: using first %u of %u servers "
3581                                         "returned for location %u\n",
3582                                                 __func__,
3583                                                 NFS4_FS_LOCATION_MAXSERVERS,
3584                                                 m, res->nlocations);
3585                                 for (i = loc->nservers; i < m; i++) {
3586                                         unsigned int len;
3587                                         char *data;
3588                                         status = decode_opaque_inline(xdr, &len, &data);
3589                                         if (unlikely(status != 0))
3590                                                 goto out_eio;
3591                                 }
3592                         }
3593                 }
3594                 status = decode_pathname(xdr, &loc->rootpath);
3595                 if (unlikely(status != 0))
3596                         goto out_eio;
3597                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3598                         res->nlocations++;
3599         }
3600         if (res->nlocations != 0)
3601                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3602 out:
3603         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3604         return status;
3605 out_overflow:
3606         print_overflow_msg(__func__, xdr);
3607 out_eio:
3608         status = -EIO;
3609         goto out;
3610 }
3611
3612 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3613 {
3614         __be32 *p;
3615         int status = 0;
3616
3617         *res = 0;
3618         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3619                 return -EIO;
3620         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3621                 p = xdr_inline_decode(xdr, 8);
3622                 if (unlikely(!p))
3623                         goto out_overflow;
3624                 xdr_decode_hyper(p, res);
3625                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3626         }
3627         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3628         return status;
3629 out_overflow:
3630         print_overflow_msg(__func__, xdr);
3631         return -EIO;
3632 }
3633
3634 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3635 {
3636         __be32 *p;
3637         int status = 0;
3638
3639         *maxlink = 1;
3640         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3641                 return -EIO;
3642         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3643                 p = xdr_inline_decode(xdr, 4);
3644                 if (unlikely(!p))
3645                         goto out_overflow;
3646                 *maxlink = be32_to_cpup(p);
3647                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3648         }
3649         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3650         return status;
3651 out_overflow:
3652         print_overflow_msg(__func__, xdr);
3653         return -EIO;
3654 }
3655
3656 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3657 {
3658         __be32 *p;
3659         int status = 0;
3660
3661         *maxname = 1024;
3662         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3663                 return -EIO;
3664         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3665                 p = xdr_inline_decode(xdr, 4);
3666                 if (unlikely(!p))
3667                         goto out_overflow;
3668                 *maxname = be32_to_cpup(p);
3669                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3670         }
3671         dprintk("%s: maxname=%u\n", __func__, *maxname);
3672         return status;
3673 out_overflow:
3674         print_overflow_msg(__func__, xdr);
3675         return -EIO;
3676 }
3677
3678 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3679 {
3680         __be32 *p;
3681         int status = 0;
3682
3683         *res = 1024;
3684         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3685                 return -EIO;
3686         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3687                 uint64_t maxread;
3688                 p = xdr_inline_decode(xdr, 8);
3689                 if (unlikely(!p))
3690                         goto out_overflow;
3691                 xdr_decode_hyper(p, &maxread);
3692                 if (maxread > 0x7FFFFFFF)
3693                         maxread = 0x7FFFFFFF;
3694                 *res = (uint32_t)maxread;
3695                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3696         }
3697         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3698         return status;
3699 out_overflow:
3700         print_overflow_msg(__func__, xdr);
3701         return -EIO;
3702 }
3703
3704 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3705 {
3706         __be32 *p;
3707         int status = 0;
3708
3709         *res = 1024;
3710         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3711                 return -EIO;
3712         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3713                 uint64_t maxwrite;
3714                 p = xdr_inline_decode(xdr, 8);
3715                 if (unlikely(!p))
3716                         goto out_overflow;
3717                 xdr_decode_hyper(p, &maxwrite);
3718                 if (maxwrite > 0x7FFFFFFF)
3719                         maxwrite = 0x7FFFFFFF;
3720                 *res = (uint32_t)maxwrite;
3721                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3722         }
3723         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3724         return status;
3725 out_overflow:
3726         print_overflow_msg(__func__, xdr);
3727         return -EIO;
3728 }
3729
3730 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3731 {
3732         uint32_t tmp;
3733         __be32 *p;
3734         int ret = 0;
3735
3736         *mode = 0;
3737         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3738                 return -EIO;
3739         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3740                 p = xdr_inline_decode(xdr, 4);
3741                 if (unlikely(!p))
3742                         goto out_overflow;
3743                 tmp = be32_to_cpup(p);
3744                 *mode = tmp & ~S_IFMT;
3745                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3746                 ret = NFS_ATTR_FATTR_MODE;
3747         }
3748         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3749         return ret;
3750 out_overflow:
3751         print_overflow_msg(__func__, xdr);
3752         return -EIO;
3753 }
3754
3755 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3756 {
3757         __be32 *p;
3758         int ret = 0;
3759
3760         *nlink = 1;
3761         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3762                 return -EIO;
3763         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3764                 p = xdr_inline_decode(xdr, 4);
3765                 if (unlikely(!p))
3766                         goto out_overflow;
3767                 *nlink = be32_to_cpup(p);
3768                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3769                 ret = NFS_ATTR_FATTR_NLINK;
3770         }
3771         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3772         return ret;
3773 out_overflow:
3774         print_overflow_msg(__func__, xdr);
3775         return -EIO;
3776 }
3777
3778 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3779                 const struct nfs_server *server, uint32_t *uid,
3780                 struct nfs4_string *owner_name)
3781 {
3782         uint32_t len;
3783         __be32 *p;
3784         int ret = 0;
3785
3786         *uid = -2;
3787         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3788                 return -EIO;
3789         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3790                 p = xdr_inline_decode(xdr, 4);
3791                 if (unlikely(!p))
3792                         goto out_overflow;
3793                 len = be32_to_cpup(p);
3794                 p = xdr_inline_decode(xdr, len);
3795                 if (unlikely(!p))
3796                         goto out_overflow;
3797                 if (owner_name != NULL) {
3798                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3799                         if (owner_name->data != NULL) {
3800                                 owner_name->len = len;
3801                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3802                         }
3803                 } else if (len < XDR_MAX_NETOBJ) {
3804                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3805                                 ret = NFS_ATTR_FATTR_OWNER;
3806                         else
3807                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3808                                                 __func__);
3809                 } else
3810                         dprintk("%s: name too long (%u)!\n",
3811                                         __func__, len);
3812                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3813         }
3814         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3815         return ret;
3816 out_overflow:
3817         print_overflow_msg(__func__, xdr);
3818         return -EIO;
3819 }
3820
3821 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3822                 const struct nfs_server *server, uint32_t *gid,
3823                 struct nfs4_string *group_name)
3824 {
3825         uint32_t len;
3826         __be32 *p;
3827         int ret = 0;
3828
3829         *gid = -2;
3830         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3831                 return -EIO;
3832         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3833                 p = xdr_inline_decode(xdr, 4);
3834                 if (unlikely(!p))
3835                         goto out_overflow;
3836                 len = be32_to_cpup(p);
3837                 p = xdr_inline_decode(xdr, len);
3838                 if (unlikely(!p))
3839                         goto out_overflow;
3840                 if (group_name != NULL) {
3841                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3842                         if (group_name->data != NULL) {
3843                                 group_name->len = len;
3844                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3845                         }
3846                 } else if (len < XDR_MAX_NETOBJ) {
3847                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3848                                 ret = NFS_ATTR_FATTR_GROUP;
3849                         else
3850                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3851                                                 __func__);
3852                 } else
3853                         dprintk("%s: name too long (%u)!\n",
3854                                         __func__, len);
3855                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3856         }
3857         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3858         return ret;
3859 out_overflow:
3860         print_overflow_msg(__func__, xdr);
3861         return -EIO;
3862 }
3863
3864 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3865 {
3866         uint32_t major = 0, minor = 0;
3867         __be32 *p;
3868         int ret = 0;
3869
3870         *rdev = MKDEV(0,0);
3871         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3872                 return -EIO;
3873         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3874                 dev_t tmp;
3875
3876                 p = xdr_inline_decode(xdr, 8);
3877                 if (unlikely(!p))
3878                         goto out_overflow;
3879                 major = be32_to_cpup(p++);
3880                 minor = be32_to_cpup(p);
3881                 tmp = MKDEV(major, minor);
3882                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3883                         *rdev = tmp;
3884                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3885                 ret = NFS_ATTR_FATTR_RDEV;
3886         }
3887         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3888         return ret;
3889 out_overflow:
3890         print_overflow_msg(__func__, xdr);
3891         return -EIO;
3892 }
3893
3894 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3895 {
3896         __be32 *p;
3897         int status = 0;
3898
3899         *res = 0;
3900         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3901                 return -EIO;
3902         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3903                 p = xdr_inline_decode(xdr, 8);
3904                 if (unlikely(!p))
3905                         goto out_overflow;
3906                 xdr_decode_hyper(p, res);
3907                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3908         }
3909         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3910         return status;
3911 out_overflow:
3912         print_overflow_msg(__func__, xdr);
3913         return -EIO;
3914 }
3915
3916 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3917 {
3918         __be32 *p;
3919         int status = 0;
3920
3921         *res = 0;
3922         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3923                 return -EIO;
3924         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3925                 p = xdr_inline_decode(xdr, 8);
3926                 if (unlikely(!p))
3927                         goto out_overflow;
3928                 xdr_decode_hyper(p, res);
3929                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3930         }
3931         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3932         return status;
3933 out_overflow:
3934         print_overflow_msg(__func__, xdr);
3935         return -EIO;
3936 }
3937
3938 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3939 {
3940         __be32 *p;
3941         int status = 0;
3942
3943         *res = 0;
3944         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3945                 return -EIO;
3946         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3947                 p = xdr_inline_decode(xdr, 8);
3948                 if (unlikely(!p))
3949                         goto out_overflow;
3950                 xdr_decode_hyper(p, res);
3951                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3952         }
3953         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3954         return status;
3955 out_overflow:
3956         print_overflow_msg(__func__, xdr);
3957         return -EIO;
3958 }
3959
3960 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3961 {
3962         __be32 *p;
3963         int ret = 0;
3964
3965         *used = 0;
3966         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3967                 return -EIO;
3968         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3969                 p = xdr_inline_decode(xdr, 8);
3970                 if (unlikely(!p))
3971                         goto out_overflow;
3972                 xdr_decode_hyper(p, used);
3973                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3974                 ret = NFS_ATTR_FATTR_SPACE_USED;
3975         }
3976         dprintk("%s: space used=%Lu\n", __func__,
3977                         (unsigned long long)*used);
3978         return ret;
3979 out_overflow:
3980         print_overflow_msg(__func__, xdr);
3981         return -EIO;
3982 }
3983
3984 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3985 {
3986         __be32 *p;
3987         uint64_t sec;
3988         uint32_t nsec;
3989
3990         p = xdr_inline_decode(xdr, 12);
3991         if (unlikely(!p))
3992                 goto out_overflow;
3993         p = xdr_decode_hyper(p, &sec);
3994         nsec = be32_to_cpup(p);
3995         time->tv_sec = (time_t)sec;
3996         time->tv_nsec = (long)nsec;
3997         return 0;
3998 out_overflow:
3999         print_overflow_msg(__func__, xdr);
4000         return -EIO;
4001 }
4002
4003 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4004 {
4005         int status = 0;
4006
4007         time->tv_sec = 0;
4008         time->tv_nsec = 0;
4009         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4010                 return -EIO;
4011         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4012                 status = decode_attr_time(xdr, time);
4013                 if (status == 0)
4014                         status = NFS_ATTR_FATTR_ATIME;
4015                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4016         }
4017         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4018         return status;
4019 }
4020
4021 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4022 {
4023         int status = 0;
4024
4025         time->tv_sec = 0;
4026         time->tv_nsec = 0;
4027         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4028                 return -EIO;
4029         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4030                 status = decode_attr_time(xdr, time);
4031                 if (status == 0)
4032                         status = NFS_ATTR_FATTR_CTIME;
4033                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4034         }
4035         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4036         return status;
4037 }
4038
4039 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4040                                   struct timespec *time)
4041 {
4042         int status = 0;
4043
4044         time->tv_sec = 0;
4045         time->tv_nsec = 0;
4046         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4047                 return -EIO;
4048         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4049                 status = decode_attr_time(xdr, time);
4050                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4051         }
4052         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4053                 (long)time->tv_nsec);
4054         return status;
4055 }
4056
4057 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4058 {
4059         int status = 0;
4060
4061         time->tv_sec = 0;
4062         time->tv_nsec = 0;
4063         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4064                 return -EIO;
4065         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4066                 status = decode_attr_time(xdr, time);
4067                 if (status == 0)
4068                         status = NFS_ATTR_FATTR_MTIME;
4069                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4070         }
4071         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4072         return status;
4073 }
4074
4075 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4076 {
4077         unsigned int attrwords = XDR_QUADLEN(attrlen);
4078         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4079
4080         if (unlikely(attrwords != nwords)) {
4081                 dprintk("%s: server returned incorrect attribute length: "
4082                         "%u %c %u\n",
4083                                 __func__,
4084                                 attrwords << 2,
4085                                 (attrwords < nwords) ? '<' : '>',
4086                                 nwords << 2);
4087                 return -EIO;
4088         }
4089         return 0;
4090 }
4091
4092 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4093 {
4094         __be32 *p;
4095
4096         p = xdr_inline_decode(xdr, 20);
4097         if (unlikely(!p))
4098                 goto out_overflow;
4099         cinfo->atomic = be32_to_cpup(p++);
4100         p = xdr_decode_hyper(p, &cinfo->before);
4101         xdr_decode_hyper(p, &cinfo->after);
4102         return 0;
4103 out_overflow:
4104         print_overflow_msg(__func__, xdr);
4105         return -EIO;
4106 }
4107
4108 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4109 {
4110         __be32 *p;
4111         uint32_t supp, acc;
4112         int status;
4113
4114         status = decode_op_hdr(xdr, OP_ACCESS);
4115         if (status)
4116                 return status;
4117         p = xdr_inline_decode(xdr, 8);
4118         if (unlikely(!p))
4119                 goto out_overflow;
4120         supp = be32_to_cpup(p++);
4121         acc = be32_to_cpup(p);
4122         *supported = supp;
4123         *access = acc;
4124         return 0;
4125 out_overflow:
4126         print_overflow_msg(__func__, xdr);
4127         return -EIO;
4128 }
4129
4130 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4131 {
4132         __be32 *p;
4133
4134         p = xdr_inline_decode(xdr, len);
4135         if (likely(p)) {
4136                 memcpy(buf, p, len);
4137                 return 0;
4138         }
4139         print_overflow_msg(__func__, xdr);
4140         return -EIO;
4141 }
4142
4143 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4144 {
4145         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4146 }
4147
4148 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4149 {
4150         int status;
4151
4152         status = decode_op_hdr(xdr, OP_CLOSE);
4153         if (status != -EIO)
4154                 nfs_increment_open_seqid(status, res->seqid);
4155         if (!status)
4156                 status = decode_stateid(xdr, &res->stateid);
4157         return status;
4158 }
4159
4160 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4161 {
4162         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4163 }
4164
4165 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4166 {
4167         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4168 }
4169
4170 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4171 {
4172         int status;
4173
4174         status = decode_op_hdr(xdr, OP_COMMIT);
4175         if (!status)
4176                 status = decode_write_verifier(xdr, &res->verf->verifier);
4177         return status;
4178 }
4179
4180 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4181 {
4182         __be32 *p;
4183         uint32_t bmlen;
4184         int status;
4185
4186         status = decode_op_hdr(xdr, OP_CREATE);
4187         if (status)
4188                 return status;
4189         if ((status = decode_change_info(xdr, cinfo)))
4190                 return status;
4191         p = xdr_inline_decode(xdr, 4);
4192         if (unlikely(!p))
4193                 goto out_overflow;
4194         bmlen = be32_to_cpup(p);
4195         p = xdr_inline_decode(xdr, bmlen << 2);
4196         if (likely(p))
4197                 return 0;
4198 out_overflow:
4199         print_overflow_msg(__func__, xdr);
4200         return -EIO;
4201 }
4202
4203 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4204 {
4205         unsigned int savep;
4206         uint32_t attrlen, bitmap[3] = {0};
4207         int status;
4208
4209         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4210                 goto xdr_error;
4211         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4212                 goto xdr_error;
4213         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4214                 goto xdr_error;
4215         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4216                 goto xdr_error;
4217         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4218                                                  &res->fh_expire_type)) != 0)
4219                 goto xdr_error;
4220         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4221                 goto xdr_error;
4222         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4223                 goto xdr_error;
4224         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4225                 goto xdr_error;
4226         status = verify_attr_len(xdr, savep, attrlen);
4227 xdr_error:
4228         dprintk("%s: xdr returned %d!\n", __func__, -status);
4229         return status;
4230 }
4231
4232 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4233 {
4234         unsigned int savep;
4235         uint32_t attrlen, bitmap[3] = {0};
4236         int status;
4237
4238         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4239                 goto xdr_error;
4240         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4241                 goto xdr_error;
4242         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4243                 goto xdr_error;
4244
4245         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4246                 goto xdr_error;
4247         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4248                 goto xdr_error;
4249         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4250                 goto xdr_error;
4251         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4252                 goto xdr_error;
4253         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4254                 goto xdr_error;
4255         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4256                 goto xdr_error;
4257
4258         status = verify_attr_len(xdr, savep, attrlen);
4259 xdr_error:
4260         dprintk("%s: xdr returned %d!\n", __func__, -status);
4261         return status;
4262 }
4263
4264 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4265 {
4266         unsigned int savep;
4267         uint32_t attrlen, bitmap[3] = {0};
4268         int status;
4269
4270         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4271                 goto xdr_error;
4272         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4273                 goto xdr_error;
4274         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4275                 goto xdr_error;
4276
4277         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4278                 goto xdr_error;
4279         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4280                 goto xdr_error;
4281
4282         status = verify_attr_len(xdr, savep, attrlen);
4283 xdr_error:
4284         dprintk("%s: xdr returned %d!\n", __func__, -status);
4285         return status;
4286 }
4287
4288 static int decode_threshold_hint(struct xdr_stream *xdr,
4289                                   uint32_t *bitmap,
4290                                   uint64_t *res,
4291                                   uint32_t hint_bit)
4292 {
4293         __be32 *p;
4294
4295         *res = 0;
4296         if (likely(bitmap[0] & hint_bit)) {
4297                 p = xdr_inline_decode(xdr, 8);
4298                 if (unlikely(!p))
4299                         goto out_overflow;
4300                 xdr_decode_hyper(p, res);
4301         }
4302         return 0;
4303 out_overflow:
4304         print_overflow_msg(__func__, xdr);
4305         return -EIO;
4306 }
4307
4308 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4309                                         struct nfs4_threshold *res)
4310 {
4311         __be32 *p;
4312         unsigned int savep;
4313         uint32_t bitmap[3] = {0,}, attrlen;
4314         int status;
4315
4316         /* layout type */
4317         p = xdr_inline_decode(xdr, 4);
4318         if (unlikely(!p)) {
4319                 print_overflow_msg(__func__, xdr);
4320                 return -EIO;
4321         }
4322         res->l_type = be32_to_cpup(p);
4323
4324         /* thi_hintset bitmap */
4325         status = decode_attr_bitmap(xdr, bitmap);
4326         if (status < 0)
4327                 goto xdr_error;
4328
4329         /* thi_hintlist length */
4330         status = decode_attr_length(xdr, &attrlen, &savep);
4331         if (status < 0)
4332                 goto xdr_error;
4333         /* thi_hintlist */
4334         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4335         if (status < 0)
4336                 goto xdr_error;
4337         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4338         if (status < 0)
4339                 goto xdr_error;
4340         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4341                                        THRESHOLD_RD_IO);
4342         if (status < 0)
4343                 goto xdr_error;
4344         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4345                                        THRESHOLD_WR_IO);
4346         if (status < 0)
4347                 goto xdr_error;
4348
4349         status = verify_attr_len(xdr, savep, attrlen);
4350         res->bm = bitmap[0];
4351
4352         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4353                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4354                 res->wr_io_sz);
4355 xdr_error:
4356         dprintk("%s ret=%d!\n", __func__, status);
4357         return status;
4358 }
4359
4360 /*
4361  * Thresholds on pNFS direct I/O vrs MDS I/O
4362  */
4363 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4364                                     uint32_t *bitmap,
4365                                     struct nfs4_threshold *res)
4366 {
4367         __be32 *p;
4368         int status = 0;
4369         uint32_t num;
4370
4371         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4372                 return -EIO;
4373         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4374                 /* Did the server return an unrequested attribute? */
4375                 if (unlikely(res == NULL))
4376                         return -EREMOTEIO;
4377                 p = xdr_inline_decode(xdr, 4);
4378                 if (unlikely(!p))
4379                         goto out_overflow;
4380                 num = be32_to_cpup(p);
4381                 if (num == 0)
4382                         return 0;
4383                 if (num > 1)
4384                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4385                                 "drivers per filesystem not supported\n",
4386                                 __func__);
4387
4388                 status = decode_first_threshold_item4(xdr, res);
4389                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4390         }
4391         return status;
4392 out_overflow:
4393         print_overflow_msg(__func__, xdr);
4394         return -EIO;
4395 }
4396
4397 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4398                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4399                 struct nfs4_fs_locations *fs_loc,
4400                 const struct nfs_server *server)
4401 {
4402         int status;
4403         umode_t fmode = 0;
4404         uint32_t type;
4405         int32_t err;
4406
4407         status = decode_attr_type(xdr, bitmap, &type);
4408         if (status < 0)
4409                 goto xdr_error;
4410         fattr->mode = 0;
4411         if (status != 0) {
4412                 fattr->mode |= nfs_type2fmt[type];
4413                 fattr->valid |= status;
4414         }
4415
4416         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4417         if (status < 0)
4418                 goto xdr_error;
4419         fattr->valid |= status;
4420
4421         status = decode_attr_size(xdr, bitmap, &fattr->size);
4422         if (status < 0)
4423                 goto xdr_error;
4424         fattr->valid |= status;
4425
4426         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4427         if (status < 0)
4428                 goto xdr_error;
4429         fattr->valid |= status;
4430
4431         err = 0;
4432         status = decode_attr_error(xdr, bitmap, &err);
4433         if (status < 0)
4434                 goto xdr_error;
4435
4436         status = decode_attr_filehandle(xdr, bitmap, fh);
4437         if (status < 0)
4438                 goto xdr_error;
4439
4440         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4441         if (status < 0)
4442                 goto xdr_error;
4443         fattr->valid |= status;
4444
4445         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4446         if (status < 0)
4447                 goto xdr_error;
4448         fattr->valid |= status;
4449
4450         status = decode_attr_mode(xdr, bitmap, &fmode);
4451         if (status < 0)
4452                 goto xdr_error;
4453         if (status != 0) {
4454                 fattr->mode |= fmode;
4455                 fattr->valid |= status;
4456         }
4457
4458         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4459         if (status < 0)
4460                 goto xdr_error;
4461         fattr->valid |= status;
4462
4463         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4464         if (status < 0)
4465                 goto xdr_error;
4466         fattr->valid |= status;
4467
4468         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4469         if (status < 0)
4470                 goto xdr_error;
4471         fattr->valid |= status;
4472
4473         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4474         if (status < 0)
4475                 goto xdr_error;
4476         fattr->valid |= status;
4477
4478         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4479         if (status < 0)
4480                 goto xdr_error;
4481         fattr->valid |= status;
4482
4483         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4484         if (status < 0)
4485                 goto xdr_error;
4486         fattr->valid |= status;
4487
4488         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4489         if (status < 0)
4490                 goto xdr_error;
4491         fattr->valid |= status;
4492
4493         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4494         if (status < 0)
4495                 goto xdr_error;
4496         fattr->valid |= status;
4497
4498         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4499         if (status < 0)
4500                 goto xdr_error;
4501         fattr->valid |= status;
4502
4503         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4504         if (status < 0)
4505                 goto xdr_error;
4506
4507 xdr_error:
4508         dprintk("%s: xdr returned %d\n", __func__, -status);
4509         return status;
4510 }
4511
4512 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4513                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4514                 const struct nfs_server *server)
4515 {
4516         unsigned int savep;
4517         uint32_t attrlen,
4518                  bitmap[3] = {0};
4519         int status;
4520
4521         status = decode_op_hdr(xdr, OP_GETATTR);
4522         if (status < 0)
4523                 goto xdr_error;
4524
4525         status = decode_attr_bitmap(xdr, bitmap);
4526         if (status < 0)
4527                 goto xdr_error;
4528
4529         status = decode_attr_length(xdr, &attrlen, &savep);
4530         if (status < 0)
4531                 goto xdr_error;
4532
4533         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4534         if (status < 0)
4535                 goto xdr_error;
4536
4537         status = verify_attr_len(xdr, savep, attrlen);
4538 xdr_error:
4539         dprintk("%s: xdr returned %d\n", __func__, -status);
4540         return status;
4541 }
4542
4543 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4544                 const struct nfs_server *server)
4545 {
4546         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4547 }
4548
4549 /*
4550  * Decode potentially multiple layout types. Currently we only support
4551  * one layout driver per file system.
4552  */
4553 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4554                                          uint32_t *layouttype)
4555 {
4556         uint32_t *p;
4557         int num;
4558
4559         p = xdr_inline_decode(xdr, 4);
4560         if (unlikely(!p))
4561                 goto out_overflow;
4562         num = be32_to_cpup(p);
4563
4564         /* pNFS is not supported by the underlying file system */
4565         if (num == 0) {
4566                 *layouttype = 0;
4567                 return 0;
4568         }
4569         if (num > 1)
4570                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4571                         "drivers per filesystem not supported\n", __func__);
4572
4573         /* Decode and set first layout type, move xdr->p past unused types */
4574         p = xdr_inline_decode(xdr, num * 4);
4575         if (unlikely(!p))
4576                 goto out_overflow;
4577         *layouttype = be32_to_cpup(p);
4578         return 0;
4579 out_overflow:
4580         print_overflow_msg(__func__, xdr);
4581         return -EIO;
4582 }
4583
4584 /*
4585  * The type of file system exported.
4586  * Note we must ensure that layouttype is set in any non-error case.
4587  */
4588 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4589                                 uint32_t *layouttype)
4590 {
4591         int status = 0;
4592
4593         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4594         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4595                 return -EIO;
4596         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4597                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4598                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4599         } else
4600                 *layouttype = 0;
4601         return status;
4602 }
4603
4604 /*
4605  * The prefered block size for layout directed io
4606  */
4607 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4608                                       uint32_t *res)
4609 {
4610         __be32 *p;
4611
4612         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4613         *res = 0;
4614         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4615                 p = xdr_inline_decode(xdr, 4);
4616                 if (unlikely(!p)) {
4617                         print_overflow_msg(__func__, xdr);
4618                         return -EIO;
4619                 }
4620                 *res = be32_to_cpup(p);
4621                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4622         }
4623         return 0;
4624 }
4625
4626 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4627 {
4628         unsigned int savep;
4629         uint32_t attrlen, bitmap[3];
4630         int status;
4631
4632         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4633                 goto xdr_error;
4634         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4635                 goto xdr_error;
4636         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4637                 goto xdr_error;
4638
4639         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4640
4641         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4642                 goto xdr_error;
4643         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4644                 goto xdr_error;
4645         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4646                 goto xdr_error;
4647         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4648         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4649                 goto xdr_error;
4650         fsinfo->wtpref = fsinfo->wtmax;
4651         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4652         if (status != 0)
4653                 goto xdr_error;
4654         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4655         if (status != 0)
4656                 goto xdr_error;
4657         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4658         if (status)
4659                 goto xdr_error;
4660
4661         status = verify_attr_len(xdr, savep, attrlen);
4662 xdr_error:
4663         dprintk("%s: xdr returned %d!\n", __func__, -status);
4664         return status;
4665 }
4666
4667 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4668 {
4669         __be32 *p;
4670         uint32_t len;
4671         int status;
4672
4673         /* Zero handle first to allow comparisons */
4674         memset(fh, 0, sizeof(*fh));
4675
4676         status = decode_op_hdr(xdr, OP_GETFH);
4677         if (status)
4678                 return status;
4679
4680         p = xdr_inline_decode(xdr, 4);
4681         if (unlikely(!p))
4682                 goto out_overflow;
4683         len = be32_to_cpup(p);
4684         if (len > NFS4_FHSIZE)
4685                 return -EIO;
4686         fh->size = len;
4687         p = xdr_inline_decode(xdr, len);
4688         if (unlikely(!p))
4689                 goto out_overflow;
4690         memcpy(fh->data, p, len);
4691         return 0;
4692 out_overflow:
4693         print_overflow_msg(__func__, xdr);
4694         return -EIO;
4695 }
4696
4697 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4698 {
4699         int status;
4700
4701         status = decode_op_hdr(xdr, OP_LINK);
4702         if (status)
4703                 return status;
4704         return decode_change_info(xdr, cinfo);
4705 }
4706
4707 /*
4708  * We create the owner, so we know a proper owner.id length is 4.
4709  */
4710 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4711 {
4712         uint64_t offset, length, clientid;
4713         __be32 *p;
4714         uint32_t namelen, type;
4715
4716         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4717         if (unlikely(!p))
4718                 goto out_overflow;
4719         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4720         p = xdr_decode_hyper(p, &length);
4721         type = be32_to_cpup(p++); /* 4 byte read */
4722         if (fl != NULL) { /* manipulate file lock */
4723                 fl->fl_start = (loff_t)offset;
4724                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4725                 if (length == ~(uint64_t)0)
4726                         fl->fl_end = OFFSET_MAX;
4727                 fl->fl_type = F_WRLCK;
4728                 if (type & 1)
4729                         fl->fl_type = F_RDLCK;
4730                 fl->fl_pid = 0;
4731         }
4732         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4733         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4734         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4735         if (likely(p))
4736                 return -NFS4ERR_DENIED;
4737 out_overflow:
4738         print_overflow_msg(__func__, xdr);
4739         return -EIO;
4740 }
4741
4742 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4743 {
4744         int status;
4745
4746         status = decode_op_hdr(xdr, OP_LOCK);
4747         if (status == -EIO)
4748                 goto out;
4749         if (status == 0) {
4750                 status = decode_stateid(xdr, &res->stateid);
4751                 if (unlikely(status))
4752                         goto out;
4753         } else if (status == -NFS4ERR_DENIED)
4754                 status = decode_lock_denied(xdr, NULL);
4755         if (res->open_seqid != NULL)
4756                 nfs_increment_open_seqid(status, res->open_seqid);
4757         nfs_increment_lock_seqid(status, res->lock_seqid);
4758 out:
4759         return status;
4760 }
4761
4762 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4763 {
4764         int status;
4765         status = decode_op_hdr(xdr, OP_LOCKT);
4766         if (status == -NFS4ERR_DENIED)
4767                 return decode_lock_denied(xdr, res->denied);
4768         return status;
4769 }
4770
4771 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4772 {
4773         int status;
4774
4775         status = decode_op_hdr(xdr, OP_LOCKU);
4776         if (status != -EIO)
4777                 nfs_increment_lock_seqid(status, res->seqid);
4778         if (status == 0)
4779                 status = decode_stateid(xdr, &res->stateid);
4780         return status;
4781 }
4782
4783 static int decode_release_lockowner(struct xdr_stream *xdr)
4784 {
4785         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4786 }
4787
4788 static int decode_lookup(struct xdr_stream *xdr)
4789 {
4790         return decode_op_hdr(xdr, OP_LOOKUP);
4791 }
4792
4793 /* This is too sick! */
4794 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4795 {
4796         __be32 *p;
4797         uint32_t limit_type, nblocks, blocksize;
4798
4799         p = xdr_inline_decode(xdr, 12);
4800         if (unlikely(!p))
4801                 goto out_overflow;
4802         limit_type = be32_to_cpup(p++);
4803         switch (limit_type) {
4804         case 1:
4805                 xdr_decode_hyper(p, maxsize);
4806                 break;
4807         case 2:
4808                 nblocks = be32_to_cpup(p++);
4809                 blocksize = be32_to_cpup(p);
4810                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4811         }
4812         return 0;
4813 out_overflow:
4814         print_overflow_msg(__func__, xdr);
4815         return -EIO;
4816 }
4817
4818 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4819 {
4820         __be32 *p;
4821         uint32_t delegation_type;
4822         int status;
4823
4824         p = xdr_inline_decode(xdr, 4);
4825         if (unlikely(!p))
4826                 goto out_overflow;
4827         delegation_type = be32_to_cpup(p);
4828         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4829                 res->delegation_type = 0;
4830                 return 0;
4831         }
4832         status = decode_stateid(xdr, &res->delegation);
4833         if (unlikely(status))
4834                 return status;
4835         p = xdr_inline_decode(xdr, 4);
4836         if (unlikely(!p))
4837                 goto out_overflow;
4838         res->do_recall = be32_to_cpup(p);
4839
4840         switch (delegation_type) {
4841         case NFS4_OPEN_DELEGATE_READ:
4842                 res->delegation_type = FMODE_READ;
4843                 break;
4844         case NFS4_OPEN_DELEGATE_WRITE:
4845                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4846                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4847                                 return -EIO;
4848         }
4849         return decode_ace(xdr, NULL, res->server->nfs_client);
4850 out_overflow:
4851         print_overflow_msg(__func__, xdr);
4852         return -EIO;
4853 }
4854
4855 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4856 {
4857         __be32 *p;
4858         uint32_t savewords, bmlen, i;
4859         int status;
4860
4861         status = decode_op_hdr(xdr, OP_OPEN);
4862         if (status != -EIO)
4863                 nfs_increment_open_seqid(status, res->seqid);
4864         if (!status)
4865                 status = decode_stateid(xdr, &res->stateid);
4866         if (unlikely(status))
4867                 return status;
4868
4869         decode_change_info(xdr, &res->cinfo);
4870
4871         p = xdr_inline_decode(xdr, 8);
4872         if (unlikely(!p))
4873                 goto out_overflow;
4874         res->rflags = be32_to_cpup(p++);
4875         bmlen = be32_to_cpup(p);
4876         if (bmlen > 10)
4877                 goto xdr_error;
4878
4879         p = xdr_inline_decode(xdr, bmlen << 2);
4880         if (unlikely(!p))
4881                 goto out_overflow;
4882         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4883         for (i = 0; i < savewords; ++i)
4884                 res->attrset[i] = be32_to_cpup(p++);
4885         for (; i < NFS4_BITMAP_SIZE; i++)
4886                 res->attrset[i] = 0;
4887
4888         return decode_delegation(xdr, res);
4889 xdr_error:
4890         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4891         return -EIO;
4892 out_overflow:
4893         print_overflow_msg(__func__, xdr);
4894         return -EIO;
4895 }
4896
4897 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4898 {
4899         int status;
4900
4901         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4902         if (status != -EIO)
4903                 nfs_increment_open_seqid(status, res->seqid);
4904         if (!status)
4905                 status = decode_stateid(xdr, &res->stateid);
4906         return status;
4907 }
4908
4909 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4910 {
4911         int status;
4912
4913         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4914         if (status != -EIO)
4915                 nfs_increment_open_seqid(status, res->seqid);
4916         if (!status)
4917                 status = decode_stateid(xdr, &res->stateid);
4918         return status;
4919 }
4920
4921 static int decode_putfh(struct xdr_stream *xdr)
4922 {
4923         return decode_op_hdr(xdr, OP_PUTFH);
4924 }
4925
4926 static int decode_putrootfh(struct xdr_stream *xdr)
4927 {
4928         return decode_op_hdr(xdr, OP_PUTROOTFH);
4929 }
4930
4931 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4932 {
4933         __be32 *p;
4934         uint32_t count, eof, recvd;
4935         int status;
4936
4937         status = decode_op_hdr(xdr, OP_READ);
4938         if (status)
4939                 return status;
4940         p = xdr_inline_decode(xdr, 8);
4941         if (unlikely(!p))
4942                 goto out_overflow;
4943         eof = be32_to_cpup(p++);
4944         count = be32_to_cpup(p);
4945         recvd = xdr_read_pages(xdr, count);
4946         if (count > recvd) {
4947                 dprintk("NFS: server cheating in read reply: "
4948                                 "count %u > recvd %u\n", count, recvd);
4949                 count = recvd;
4950                 eof = 0;
4951         }
4952         res->eof = eof;
4953         res->count = count;
4954         return 0;
4955 out_overflow:
4956         print_overflow_msg(__func__, xdr);
4957         return -EIO;
4958 }
4959
4960 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4961 {
4962         int             status;
4963         __be32          verf[2];
4964
4965         status = decode_op_hdr(xdr, OP_READDIR);
4966         if (!status)
4967                 status = decode_verifier(xdr, readdir->verifier.data);
4968         if (unlikely(status))
4969                 return status;
4970         memcpy(verf, readdir->verifier.data, sizeof(verf));
4971         dprintk("%s: verifier = %08x:%08x\n",
4972                         __func__, verf[0], verf[1]);
4973         return xdr_read_pages(xdr, xdr->buf->page_len);
4974 }
4975
4976 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4977 {
4978         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4979         u32 len, recvd;
4980         __be32 *p;
4981         int status;
4982
4983         status = decode_op_hdr(xdr, OP_READLINK);
4984         if (status)
4985                 return status;
4986
4987         /* Convert length of symlink */
4988         p = xdr_inline_decode(xdr, 4);
4989         if (unlikely(!p))
4990                 goto out_overflow;
4991         len = be32_to_cpup(p);
4992         if (len >= rcvbuf->page_len || len <= 0) {
4993                 dprintk("nfs: server returned giant symlink!\n");
4994                 return -ENAMETOOLONG;
4995         }
4996         recvd = xdr_read_pages(xdr, len);
4997         if (recvd < len) {
4998                 dprintk("NFS: server cheating in readlink reply: "
4999                                 "count %u > recvd %u\n", len, recvd);
5000                 return -EIO;
5001         }
5002         /*
5003          * The XDR encode routine has set things up so that
5004          * the link text will be copied directly into the
5005          * buffer.  We just have to do overflow-checking,
5006          * and and null-terminate the text (the VFS expects
5007          * null-termination).
5008          */
5009         xdr_terminate_string(rcvbuf, len);
5010         return 0;
5011 out_overflow:
5012         print_overflow_msg(__func__, xdr);
5013         return -EIO;
5014 }
5015
5016 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5017 {
5018         int status;
5019
5020         status = decode_op_hdr(xdr, OP_REMOVE);
5021         if (status)
5022                 goto out;
5023         status = decode_change_info(xdr, cinfo);
5024 out:
5025         return status;
5026 }
5027
5028 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5029               struct nfs4_change_info *new_cinfo)
5030 {
5031         int status;
5032
5033         status = decode_op_hdr(xdr, OP_RENAME);
5034         if (status)
5035                 goto out;
5036         if ((status = decode_change_info(xdr, old_cinfo)))
5037                 goto out;
5038         status = decode_change_info(xdr, new_cinfo);
5039 out:
5040         return status;
5041 }
5042
5043 static int decode_renew(struct xdr_stream *xdr)
5044 {
5045         return decode_op_hdr(xdr, OP_RENEW);
5046 }
5047
5048 static int
5049 decode_restorefh(struct xdr_stream *xdr)
5050 {
5051         return decode_op_hdr(xdr, OP_RESTOREFH);
5052 }
5053
5054 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5055                          struct nfs_getaclres *res)
5056 {
5057         unsigned int savep;
5058         uint32_t attrlen,
5059                  bitmap[3] = {0};
5060         int status;
5061         unsigned int pg_offset;
5062
5063         res->acl_len = 0;
5064         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5065                 goto out;
5066
5067         xdr_enter_page(xdr, xdr->buf->page_len);
5068
5069         /* Calculate the offset of the page data */
5070         pg_offset = xdr->buf->head[0].iov_len;
5071
5072         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5073                 goto out;
5074         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5075                 goto out;
5076
5077         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5078                 return -EIO;
5079         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5080
5081                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5082                  * are stored with the acl data to handle the problem of
5083                  * variable length bitmaps.*/
5084                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5085                 res->acl_len = attrlen;
5086
5087                 /* Check for receive buffer overflow */
5088                 if (res->acl_len > (xdr->nwords << 2) ||
5089                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5090                         res->acl_flags |= NFS4_ACL_TRUNC;
5091                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5092                                         attrlen, xdr->nwords << 2);
5093                 }
5094         } else
5095                 status = -EOPNOTSUPP;
5096
5097 out:
5098         return status;
5099 }
5100
5101 static int
5102 decode_savefh(struct xdr_stream *xdr)
5103 {
5104         return decode_op_hdr(xdr, OP_SAVEFH);
5105 }
5106
5107 static int decode_setattr(struct xdr_stream *xdr)
5108 {
5109         __be32 *p;
5110         uint32_t bmlen;
5111         int status;
5112
5113         status = decode_op_hdr(xdr, OP_SETATTR);
5114         if (status)
5115                 return status;
5116         p = xdr_inline_decode(xdr, 4);
5117         if (unlikely(!p))
5118                 goto out_overflow;
5119         bmlen = be32_to_cpup(p);
5120         p = xdr_inline_decode(xdr, bmlen << 2);
5121         if (likely(p))
5122                 return 0;
5123 out_overflow:
5124         print_overflow_msg(__func__, xdr);
5125         return -EIO;
5126 }
5127
5128 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5129 {
5130         __be32 *p;
5131         uint32_t opnum;
5132         int32_t nfserr;
5133
5134         p = xdr_inline_decode(xdr, 8);
5135         if (unlikely(!p))
5136                 goto out_overflow;
5137         opnum = be32_to_cpup(p++);
5138         if (opnum != OP_SETCLIENTID) {
5139                 dprintk("nfs: decode_setclientid: Server returned operation"
5140                         " %d\n", opnum);
5141                 return -EIO;
5142         }
5143         nfserr = be32_to_cpup(p);
5144         if (nfserr == NFS_OK) {
5145                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5146                 if (unlikely(!p))
5147                         goto out_overflow;
5148                 p = xdr_decode_hyper(p, &res->clientid);
5149                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5150         } else if (nfserr == NFSERR_CLID_INUSE) {
5151                 uint32_t len;
5152
5153                 /* skip netid string */
5154                 p = xdr_inline_decode(xdr, 4);
5155                 if (unlikely(!p))
5156                         goto out_overflow;
5157                 len = be32_to_cpup(p);
5158                 p = xdr_inline_decode(xdr, len);
5159                 if (unlikely(!p))
5160                         goto out_overflow;
5161
5162                 /* skip uaddr string */
5163                 p = xdr_inline_decode(xdr, 4);
5164                 if (unlikely(!p))
5165                         goto out_overflow;
5166                 len = be32_to_cpup(p);
5167                 p = xdr_inline_decode(xdr, len);
5168                 if (unlikely(!p))
5169                         goto out_overflow;
5170                 return -NFSERR_CLID_INUSE;
5171         } else
5172                 return nfs4_stat_to_errno(nfserr);
5173
5174         return 0;
5175 out_overflow:
5176         print_overflow_msg(__func__, xdr);
5177         return -EIO;
5178 }
5179
5180 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5181 {
5182         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5183 }
5184
5185 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5186 {
5187         __be32 *p;
5188         int status;
5189
5190         status = decode_op_hdr(xdr, OP_WRITE);
5191         if (status)
5192                 return status;
5193
5194         p = xdr_inline_decode(xdr, 8);
5195         if (unlikely(!p))
5196                 goto out_overflow;
5197         res->count = be32_to_cpup(p++);
5198         res->verf->committed = be32_to_cpup(p++);
5199         return decode_write_verifier(xdr, &res->verf->verifier);
5200 out_overflow:
5201         print_overflow_msg(__func__, xdr);
5202         return -EIO;
5203 }
5204
5205 static int decode_delegreturn(struct xdr_stream *xdr)
5206 {
5207         return decode_op_hdr(xdr, OP_DELEGRETURN);
5208 }
5209
5210 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5211 {
5212         __be32 *p;
5213
5214         p = xdr_inline_decode(xdr, 4);
5215         if (unlikely(!p))
5216                 goto out_overflow;
5217         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5218         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5219                 goto out_err;
5220
5221         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5222         if (unlikely(!p))
5223                 goto out_overflow;
5224         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5225
5226         p = xdr_inline_decode(xdr, 8);
5227         if (unlikely(!p))
5228                 goto out_overflow;
5229         flavor->gss.qop4 = be32_to_cpup(p++);
5230         flavor->gss.service = be32_to_cpup(p);
5231
5232         return 0;
5233
5234 out_overflow:
5235         print_overflow_msg(__func__, xdr);
5236         return -EIO;
5237 out_err:
5238         return -EINVAL;
5239 }
5240
5241 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5242 {
5243         struct nfs4_secinfo_flavor *sec_flavor;
5244         int status;
5245         __be32 *p;
5246         int i, num_flavors;
5247
5248         p = xdr_inline_decode(xdr, 4);
5249         if (unlikely(!p))
5250                 goto out_overflow;
5251
5252         res->flavors->num_flavors = 0;
5253         num_flavors = be32_to_cpup(p);
5254
5255         for (i = 0; i < num_flavors; i++) {
5256                 sec_flavor = &res->flavors->flavors[i];
5257                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5258                         break;
5259
5260                 p = xdr_inline_decode(xdr, 4);
5261                 if (unlikely(!p))
5262                         goto out_overflow;
5263                 sec_flavor->flavor = be32_to_cpup(p);
5264
5265                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5266                         status = decode_secinfo_gss(xdr, sec_flavor);
5267                         if (status)
5268                                 goto out;
5269                 }
5270                 res->flavors->num_flavors++;
5271         }
5272
5273         status = 0;
5274 out:
5275         return status;
5276 out_overflow:
5277         print_overflow_msg(__func__, xdr);
5278         return -EIO;
5279 }
5280
5281 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5282 {
5283         int status = decode_op_hdr(xdr, OP_SECINFO);
5284         if (status)
5285                 return status;
5286         return decode_secinfo_common(xdr, res);
5287 }
5288
5289 #if defined(CONFIG_NFS_V4_1)
5290 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5291 {
5292         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5293         if (status)
5294                 return status;
5295         return decode_secinfo_common(xdr, res);
5296 }
5297
5298 static int decode_exchange_id(struct xdr_stream *xdr,
5299                               struct nfs41_exchange_id_res *res)
5300 {
5301         __be32 *p;
5302         uint32_t dummy;
5303         char *dummy_str;
5304         int status;
5305         uint32_t impl_id_count;
5306
5307         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5308         if (status)
5309                 return status;
5310
5311         p = xdr_inline_decode(xdr, 8);
5312         if (unlikely(!p))
5313                 goto out_overflow;
5314         xdr_decode_hyper(p, &res->clientid);
5315         p = xdr_inline_decode(xdr, 12);
5316         if (unlikely(!p))
5317                 goto out_overflow;
5318         res->seqid = be32_to_cpup(p++);
5319         res->flags = be32_to_cpup(p++);
5320
5321         /* We ask for SP4_NONE */
5322         dummy = be32_to_cpup(p);
5323         if (dummy != SP4_NONE)
5324                 return -EIO;
5325
5326         /* server_owner4.so_minor_id */
5327         p = xdr_inline_decode(xdr, 8);
5328         if (unlikely(!p))
5329                 goto out_overflow;
5330         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5331
5332         /* server_owner4.so_major_id */
5333         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5334         if (unlikely(status))
5335                 return status;
5336         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5337                 return -EIO;
5338         memcpy(res->server_owner->major_id, dummy_str, dummy);
5339         res->server_owner->major_id_sz = dummy;
5340
5341         /* server_scope4 */
5342         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5343         if (unlikely(status))
5344                 return status;
5345         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5346                 return -EIO;
5347         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5348         res->server_scope->server_scope_sz = dummy;
5349
5350         /* Implementation Id */
5351         p = xdr_inline_decode(xdr, 4);
5352         if (unlikely(!p))
5353                 goto out_overflow;
5354         impl_id_count = be32_to_cpup(p++);
5355
5356         if (impl_id_count) {
5357                 /* nii_domain */
5358                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5359                 if (unlikely(status))
5360                         return status;
5361                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5362                         return -EIO;
5363                 memcpy(res->impl_id->domain, dummy_str, dummy);
5364
5365                 /* nii_name */
5366                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5367                 if (unlikely(status))
5368                         return status;
5369                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5370                         return -EIO;
5371                 memcpy(res->impl_id->name, dummy_str, dummy);
5372
5373                 /* nii_date */
5374                 p = xdr_inline_decode(xdr, 12);
5375                 if (unlikely(!p))
5376                         goto out_overflow;
5377                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5378                 res->impl_id->date.nseconds = be32_to_cpup(p);
5379
5380                 /* if there's more than one entry, ignore the rest */
5381         }
5382         return 0;
5383 out_overflow:
5384         print_overflow_msg(__func__, xdr);
5385         return -EIO;
5386 }
5387
5388 static int decode_chan_attrs(struct xdr_stream *xdr,
5389                              struct nfs4_channel_attrs *attrs)
5390 {
5391         __be32 *p;
5392         u32 nr_attrs, val;
5393
5394         p = xdr_inline_decode(xdr, 28);
5395         if (unlikely(!p))
5396                 goto out_overflow;
5397         val = be32_to_cpup(p++);        /* headerpadsz */
5398         if (val)
5399                 return -EINVAL;         /* no support for header padding yet */
5400         attrs->max_rqst_sz = be32_to_cpup(p++);
5401         attrs->max_resp_sz = be32_to_cpup(p++);
5402         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5403         attrs->max_ops = be32_to_cpup(p++);
5404         attrs->max_reqs = be32_to_cpup(p++);
5405         nr_attrs = be32_to_cpup(p);
5406         if (unlikely(nr_attrs > 1)) {
5407                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5408                         "count %u\n", __func__, nr_attrs);
5409                 return -EINVAL;
5410         }
5411         if (nr_attrs == 1) {
5412                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5413                 if (unlikely(!p))
5414                         goto out_overflow;
5415         }
5416         return 0;
5417 out_overflow:
5418         print_overflow_msg(__func__, xdr);
5419         return -EIO;
5420 }
5421
5422 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5423 {
5424         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5425 }
5426
5427 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5428                                 struct nfs41_bind_conn_to_session_res *res)
5429 {
5430         __be32 *p;
5431         int status;
5432
5433         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5434         if (!status)
5435                 status = decode_sessionid(xdr, &res->session->sess_id);
5436         if (unlikely(status))
5437                 return status;
5438
5439         /* dir flags, rdma mode bool */
5440         p = xdr_inline_decode(xdr, 8);
5441         if (unlikely(!p))
5442                 goto out_overflow;
5443
5444         res->dir = be32_to_cpup(p++);
5445         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5446                 return -EIO;
5447         if (be32_to_cpup(p) == 0)
5448                 res->use_conn_in_rdma_mode = false;
5449         else
5450                 res->use_conn_in_rdma_mode = true;
5451
5452         return 0;
5453 out_overflow:
5454         print_overflow_msg(__func__, xdr);
5455         return -EIO;
5456 }
5457
5458 static int decode_create_session(struct xdr_stream *xdr,
5459                                  struct nfs41_create_session_res *res)
5460 {
5461         __be32 *p;
5462         int status;
5463         struct nfs_client *clp = res->client;
5464         struct nfs4_session *session = clp->cl_session;
5465
5466         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5467         if (!status)
5468                 status = decode_sessionid(xdr, &session->sess_id);
5469         if (unlikely(status))
5470                 return status;
5471
5472         /* seqid, flags */
5473         p = xdr_inline_decode(xdr, 8);
5474         if (unlikely(!p))
5475                 goto out_overflow;
5476         clp->cl_seqid = be32_to_cpup(p++);
5477         session->flags = be32_to_cpup(p);
5478
5479         /* Channel attributes */
5480         status = decode_chan_attrs(xdr, &session->fc_attrs);
5481         if (!status)
5482                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5483         return status;
5484 out_overflow:
5485         print_overflow_msg(__func__, xdr);
5486         return -EIO;
5487 }
5488
5489 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5490 {
5491         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5492 }
5493
5494 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5495 {
5496         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5497 }
5498
5499 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5500 {
5501         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5502 }
5503 #endif /* CONFIG_NFS_V4_1 */
5504
5505 static int decode_sequence(struct xdr_stream *xdr,
5506                            struct nfs4_sequence_res *res,
5507                            struct rpc_rqst *rqstp)
5508 {
5509 #if defined(CONFIG_NFS_V4_1)
5510         struct nfs4_session *session;
5511         struct nfs4_sessionid id;
5512         u32 dummy;
5513         int status;
5514         __be32 *p;
5515
5516         if (res->sr_slot == NULL)
5517                 return 0;
5518
5519         status = decode_op_hdr(xdr, OP_SEQUENCE);
5520         if (!status)
5521                 status = decode_sessionid(xdr, &id);
5522         if (unlikely(status))
5523                 goto out_err;
5524
5525         /*
5526          * If the server returns different values for sessionID, slotID or
5527          * sequence number, the server is looney tunes.
5528          */
5529         status = -EREMOTEIO;
5530         session = res->sr_slot->table->session;
5531
5532         if (memcmp(id.data, session->sess_id.data,
5533                    NFS4_MAX_SESSIONID_LEN)) {
5534                 dprintk("%s Invalid session id\n", __func__);
5535                 goto out_err;
5536         }
5537
5538         p = xdr_inline_decode(xdr, 20);
5539         if (unlikely(!p))
5540                 goto out_overflow;
5541
5542         /* seqid */
5543         dummy = be32_to_cpup(p++);
5544         if (dummy != res->sr_slot->seq_nr) {
5545                 dprintk("%s Invalid sequence number\n", __func__);
5546                 goto out_err;
5547         }
5548         /* slot id */
5549         dummy = be32_to_cpup(p++);
5550         if (dummy != res->sr_slot - session->fc_slot_table.slots) {
5551                 dprintk("%s Invalid slot id\n", __func__);
5552                 goto out_err;
5553         }
5554         /* highest slot id - currently not processed */
5555         dummy = be32_to_cpup(p++);
5556         /* target highest slot id - currently not processed */
5557         dummy = be32_to_cpup(p++);
5558         /* result flags */
5559         res->sr_status_flags = be32_to_cpup(p);
5560         status = 0;
5561 out_err:
5562         res->sr_status = status;
5563         return status;
5564 out_overflow:
5565         print_overflow_msg(__func__, xdr);
5566         status = -EIO;
5567         goto out_err;
5568 #else  /* CONFIG_NFS_V4_1 */
5569         return 0;
5570 #endif /* CONFIG_NFS_V4_1 */
5571 }
5572
5573 #if defined(CONFIG_NFS_V4_1)
5574 /*
5575  * TODO: Need to handle case when EOF != true;
5576  */
5577 static int decode_getdevicelist(struct xdr_stream *xdr,
5578                                 struct pnfs_devicelist *res)
5579 {
5580         __be32 *p;
5581         int status, i;
5582         nfs4_verifier verftemp;
5583
5584         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5585         if (status)
5586                 return status;
5587
5588         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5589         if (unlikely(!p))
5590                 goto out_overflow;
5591
5592         /* TODO: Skip cookie for now */
5593         p += 2;
5594
5595         /* Read verifier */
5596         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5597
5598         res->num_devs = be32_to_cpup(p);
5599
5600         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5601
5602         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5603                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5604                                 __func__, res->num_devs);
5605                 return -EIO;
5606         }
5607
5608         p = xdr_inline_decode(xdr,
5609                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5610         if (unlikely(!p))
5611                 goto out_overflow;
5612         for (i = 0; i < res->num_devs; i++)
5613                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5614                                             NFS4_DEVICEID4_SIZE);
5615         res->eof = be32_to_cpup(p);
5616         return 0;
5617 out_overflow:
5618         print_overflow_msg(__func__, xdr);
5619         return -EIO;
5620 }
5621
5622 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5623                                 struct pnfs_device *pdev)
5624 {
5625         __be32 *p;
5626         uint32_t len, type;
5627         int status;
5628
5629         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5630         if (status) {
5631                 if (status == -ETOOSMALL) {
5632                         p = xdr_inline_decode(xdr, 4);
5633                         if (unlikely(!p))
5634                                 goto out_overflow;
5635                         pdev->mincount = be32_to_cpup(p);
5636                         dprintk("%s: Min count too small. mincnt = %u\n",
5637                                 __func__, pdev->mincount);
5638                 }
5639                 return status;
5640         }
5641
5642         p = xdr_inline_decode(xdr, 8);
5643         if (unlikely(!p))
5644                 goto out_overflow;
5645         type = be32_to_cpup(p++);
5646         if (type != pdev->layout_type) {
5647                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5648                         __func__, pdev->layout_type, type);
5649                 return -EINVAL;
5650         }
5651         /*
5652          * Get the length of the opaque device_addr4. xdr_read_pages places
5653          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5654          * and places the remaining xdr data in xdr_buf->tail
5655          */
5656         pdev->mincount = be32_to_cpup(p);
5657         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5658                 goto out_overflow;
5659
5660         /* Parse notification bitmap, verifying that it is zero. */
5661         p = xdr_inline_decode(xdr, 4);
5662         if (unlikely(!p))
5663                 goto out_overflow;
5664         len = be32_to_cpup(p);
5665         if (len) {
5666                 uint32_t i;
5667
5668                 p = xdr_inline_decode(xdr, 4 * len);
5669                 if (unlikely(!p))
5670                         goto out_overflow;
5671                 for (i = 0; i < len; i++, p++) {
5672                         if (be32_to_cpup(p)) {
5673                                 dprintk("%s: notifications not supported\n",
5674                                         __func__);
5675                                 return -EIO;
5676                         }
5677                 }
5678         }
5679         return 0;
5680 out_overflow:
5681         print_overflow_msg(__func__, xdr);
5682         return -EIO;
5683 }
5684
5685 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5686                             struct nfs4_layoutget_res *res)
5687 {
5688         __be32 *p;
5689         int status;
5690         u32 layout_count;
5691         u32 recvd;
5692
5693         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5694         if (status)
5695                 return status;
5696         p = xdr_inline_decode(xdr, 4);
5697         if (unlikely(!p))
5698                 goto out_overflow;
5699         res->return_on_close = be32_to_cpup(p);
5700         decode_stateid(xdr, &res->stateid);
5701         p = xdr_inline_decode(xdr, 4);
5702         if (unlikely(!p))
5703                 goto out_overflow;
5704         layout_count = be32_to_cpup(p);
5705         if (!layout_count) {
5706                 dprintk("%s: server responded with empty layout array\n",
5707                         __func__);
5708                 return -EINVAL;
5709         }
5710
5711         p = xdr_inline_decode(xdr, 28);
5712         if (unlikely(!p))
5713                 goto out_overflow;
5714         p = xdr_decode_hyper(p, &res->range.offset);
5715         p = xdr_decode_hyper(p, &res->range.length);
5716         res->range.iomode = be32_to_cpup(p++);
5717         res->type = be32_to_cpup(p++);
5718         res->layoutp->len = be32_to_cpup(p);
5719
5720         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5721                 __func__,
5722                 (unsigned long)res->range.offset,
5723                 (unsigned long)res->range.length,
5724                 res->range.iomode,
5725                 res->type,
5726                 res->layoutp->len);
5727
5728         recvd = xdr_read_pages(xdr, res->layoutp->len);
5729         if (res->layoutp->len > recvd) {
5730                 dprintk("NFS: server cheating in layoutget reply: "
5731                                 "layout len %u > recvd %u\n",
5732                                 res->layoutp->len, recvd);
5733                 return -EINVAL;
5734         }
5735
5736         if (layout_count > 1) {
5737                 /* We only handle a length one array at the moment.  Any
5738                  * further entries are just ignored.  Note that this means
5739                  * the client may see a response that is less than the
5740                  * minimum it requested.
5741                  */
5742                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5743                         __func__, layout_count);
5744         }
5745
5746         return 0;
5747 out_overflow:
5748         print_overflow_msg(__func__, xdr);
5749         return -EIO;
5750 }
5751
5752 static int decode_layoutreturn(struct xdr_stream *xdr,
5753                                struct nfs4_layoutreturn_res *res)
5754 {
5755         __be32 *p;
5756         int status;
5757
5758         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5759         if (status)
5760                 return status;
5761         p = xdr_inline_decode(xdr, 4);
5762         if (unlikely(!p))
5763                 goto out_overflow;
5764         res->lrs_present = be32_to_cpup(p);
5765         if (res->lrs_present)
5766                 status = decode_stateid(xdr, &res->stateid);
5767         return status;
5768 out_overflow:
5769         print_overflow_msg(__func__, xdr);
5770         return -EIO;
5771 }
5772
5773 static int decode_layoutcommit(struct xdr_stream *xdr,
5774                                struct rpc_rqst *req,
5775                                struct nfs4_layoutcommit_res *res)
5776 {
5777         __be32 *p;
5778         __u32 sizechanged;
5779         int status;
5780
5781         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5782         res->status = status;
5783         if (status)
5784                 return status;
5785
5786         p = xdr_inline_decode(xdr, 4);
5787         if (unlikely(!p))
5788                 goto out_overflow;
5789         sizechanged = be32_to_cpup(p);
5790
5791         if (sizechanged) {
5792                 /* throw away new size */
5793                 p = xdr_inline_decode(xdr, 8);
5794                 if (unlikely(!p))
5795                         goto out_overflow;
5796         }
5797         return 0;
5798 out_overflow:
5799         print_overflow_msg(__func__, xdr);
5800         return -EIO;
5801 }
5802
5803 static int decode_test_stateid(struct xdr_stream *xdr,
5804                                struct nfs41_test_stateid_res *res)
5805 {
5806         __be32 *p;
5807         int status;
5808         int num_res;
5809
5810         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5811         if (status)
5812                 return status;
5813
5814         p = xdr_inline_decode(xdr, 4);
5815         if (unlikely(!p))
5816                 goto out_overflow;
5817         num_res = be32_to_cpup(p++);
5818         if (num_res != 1)
5819                 goto out;
5820
5821         p = xdr_inline_decode(xdr, 4);
5822         if (unlikely(!p))
5823                 goto out_overflow;
5824         res->status = be32_to_cpup(p++);
5825
5826         return status;
5827 out_overflow:
5828         print_overflow_msg(__func__, xdr);
5829 out:
5830         return -EIO;
5831 }
5832
5833 static int decode_free_stateid(struct xdr_stream *xdr,
5834                                struct nfs41_free_stateid_res *res)
5835 {
5836         __be32 *p;
5837         int status;
5838
5839         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5840         if (status)
5841                 return status;
5842
5843         p = xdr_inline_decode(xdr, 4);
5844         if (unlikely(!p))
5845                 goto out_overflow;
5846         res->status = be32_to_cpup(p++);
5847         return res->status;
5848 out_overflow:
5849         print_overflow_msg(__func__, xdr);
5850         return -EIO;
5851 }
5852 #endif /* CONFIG_NFS_V4_1 */
5853
5854 /*
5855  * END OF "GENERIC" DECODE ROUTINES.
5856  */
5857
5858 /*
5859  * Decode OPEN_DOWNGRADE response
5860  */
5861 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5862                                        struct xdr_stream *xdr,
5863                                        struct nfs_closeres *res)
5864 {
5865         struct compound_hdr hdr;
5866         int status;
5867
5868         status = decode_compound_hdr(xdr, &hdr);
5869         if (status)
5870                 goto out;
5871         status = decode_sequence(xdr, &res->seq_res, rqstp);
5872         if (status)
5873                 goto out;
5874         status = decode_putfh(xdr);
5875         if (status)
5876                 goto out;
5877         status = decode_open_downgrade(xdr, res);
5878         if (status != 0)
5879                 goto out;
5880         decode_getfattr(xdr, res->fattr, res->server);
5881 out:
5882         return status;
5883 }
5884
5885 /*
5886  * Decode ACCESS response
5887  */
5888 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5889                                struct nfs4_accessres *res)
5890 {
5891         struct compound_hdr hdr;
5892         int status;
5893
5894         status = decode_compound_hdr(xdr, &hdr);
5895         if (status)
5896                 goto out;
5897         status = decode_sequence(xdr, &res->seq_res, rqstp);
5898         if (status)
5899                 goto out;
5900         status = decode_putfh(xdr);
5901         if (status != 0)
5902                 goto out;
5903         status = decode_access(xdr, &res->supported, &res->access);
5904         if (status != 0)
5905                 goto out;
5906         decode_getfattr(xdr, res->fattr, res->server);
5907 out:
5908         return status;
5909 }
5910
5911 /*
5912  * Decode LOOKUP response
5913  */
5914 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5915                                struct nfs4_lookup_res *res)
5916 {
5917         struct compound_hdr hdr;
5918         int status;
5919
5920         status = decode_compound_hdr(xdr, &hdr);
5921         if (status)
5922                 goto out;
5923         status = decode_sequence(xdr, &res->seq_res, rqstp);
5924         if (status)
5925                 goto out;
5926         status = decode_putfh(xdr);
5927         if (status)
5928                 goto out;
5929         status = decode_lookup(xdr);
5930         if (status)
5931                 goto out;
5932         status = decode_getfh(xdr, res->fh);
5933         if (status)
5934                 goto out;
5935         status = decode_getfattr(xdr, res->fattr, res->server);
5936 out:
5937         return status;
5938 }
5939
5940 /*
5941  * Decode LOOKUP_ROOT response
5942  */
5943 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5944                                     struct xdr_stream *xdr,
5945                                     struct nfs4_lookup_res *res)
5946 {
5947         struct compound_hdr hdr;
5948         int status;
5949
5950         status = decode_compound_hdr(xdr, &hdr);
5951         if (status)
5952                 goto out;
5953         status = decode_sequence(xdr, &res->seq_res, rqstp);
5954         if (status)
5955                 goto out;
5956         status = decode_putrootfh(xdr);
5957         if (status)
5958                 goto out;
5959         status = decode_getfh(xdr, res->fh);
5960         if (status == 0)
5961                 status = decode_getfattr(xdr, res->fattr, res->server);
5962 out:
5963         return status;
5964 }
5965
5966 /*
5967  * Decode REMOVE response
5968  */
5969 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5970                                struct nfs_removeres *res)
5971 {
5972         struct compound_hdr hdr;
5973         int status;
5974
5975         status = decode_compound_hdr(xdr, &hdr);
5976         if (status)
5977                 goto out;
5978         status = decode_sequence(xdr, &res->seq_res, rqstp);
5979         if (status)
5980                 goto out;
5981         status = decode_putfh(xdr);
5982         if (status)
5983                 goto out;
5984         status = decode_remove(xdr, &res->cinfo);
5985 out:
5986         return status;
5987 }
5988
5989 /*
5990  * Decode RENAME response
5991  */
5992 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5993                                struct nfs_renameres *res)
5994 {
5995         struct compound_hdr hdr;
5996         int status;
5997
5998         status = decode_compound_hdr(xdr, &hdr);
5999         if (status)
6000                 goto out;
6001         status = decode_sequence(xdr, &res->seq_res, rqstp);
6002         if (status)
6003                 goto out;
6004         status = decode_putfh(xdr);
6005         if (status)
6006                 goto out;
6007         status = decode_savefh(xdr);
6008         if (status)
6009                 goto out;
6010         status = decode_putfh(xdr);
6011         if (status)
6012                 goto out;
6013         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6014 out:
6015         return status;
6016 }
6017
6018 /*
6019  * Decode LINK response
6020  */
6021 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6022                              struct nfs4_link_res *res)
6023 {
6024         struct compound_hdr hdr;
6025         int status;
6026
6027         status = decode_compound_hdr(xdr, &hdr);
6028         if (status)
6029                 goto out;
6030         status = decode_sequence(xdr, &res->seq_res, rqstp);
6031         if (status)
6032                 goto out;
6033         status = decode_putfh(xdr);
6034         if (status)
6035                 goto out;
6036         status = decode_savefh(xdr);
6037         if (status)
6038                 goto out;
6039         status = decode_putfh(xdr);
6040         if (status)
6041                 goto out;
6042         status = decode_link(xdr, &res->cinfo);
6043         if (status)
6044                 goto out;
6045         /*
6046          * Note order: OP_LINK leaves the directory as the current
6047          *             filehandle.
6048          */
6049         status = decode_restorefh(xdr);
6050         if (status)
6051                 goto out;
6052         decode_getfattr(xdr, res->fattr, res->server);
6053 out:
6054         return status;
6055 }
6056
6057 /*
6058  * Decode CREATE response
6059  */
6060 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6061                                struct nfs4_create_res *res)
6062 {
6063         struct compound_hdr hdr;
6064         int status;
6065
6066         status = decode_compound_hdr(xdr, &hdr);
6067         if (status)
6068                 goto out;
6069         status = decode_sequence(xdr, &res->seq_res, rqstp);
6070         if (status)
6071                 goto out;
6072         status = decode_putfh(xdr);
6073         if (status)
6074                 goto out;
6075         status = decode_create(xdr, &res->dir_cinfo);
6076         if (status)
6077                 goto out;
6078         status = decode_getfh(xdr, res->fh);
6079         if (status)
6080                 goto out;
6081         decode_getfattr(xdr, res->fattr, res->server);
6082 out:
6083         return status;
6084 }
6085
6086 /*
6087  * Decode SYMLINK response
6088  */
6089 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6090                                 struct nfs4_create_res *res)
6091 {
6092         return nfs4_xdr_dec_create(rqstp, xdr, res);
6093 }
6094
6095 /*
6096  * Decode GETATTR response
6097  */
6098 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6099                                 struct nfs4_getattr_res *res)
6100 {
6101         struct compound_hdr hdr;
6102         int status;
6103
6104         status = decode_compound_hdr(xdr, &hdr);
6105         if (status)
6106                 goto out;
6107         status = decode_sequence(xdr, &res->seq_res, rqstp);
6108         if (status)
6109                 goto out;
6110         status = decode_putfh(xdr);
6111         if (status)
6112                 goto out;
6113         status = decode_getfattr(xdr, res->fattr, res->server);
6114 out:
6115         return status;
6116 }
6117
6118 /*
6119  * Encode an SETACL request
6120  */
6121 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6122                                 struct nfs_setaclargs *args)
6123 {
6124         struct compound_hdr hdr = {
6125                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6126         };
6127
6128         encode_compound_hdr(xdr, req, &hdr);
6129         encode_sequence(xdr, &args->seq_args, &hdr);
6130         encode_putfh(xdr, args->fh, &hdr);
6131         encode_setacl(xdr, args, &hdr);
6132         encode_nops(&hdr);
6133 }
6134
6135 /*
6136  * Decode SETACL response
6137  */
6138 static int
6139 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6140                     struct nfs_setaclres *res)
6141 {
6142         struct compound_hdr hdr;
6143         int status;
6144
6145         status = decode_compound_hdr(xdr, &hdr);
6146         if (status)
6147                 goto out;
6148         status = decode_sequence(xdr, &res->seq_res, rqstp);
6149         if (status)
6150                 goto out;
6151         status = decode_putfh(xdr);
6152         if (status)
6153                 goto out;
6154         status = decode_setattr(xdr);
6155 out:
6156         return status;
6157 }
6158
6159 /*
6160  * Decode GETACL response
6161  */
6162 static int
6163 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6164                     struct nfs_getaclres *res)
6165 {
6166         struct compound_hdr hdr;
6167         int status;
6168
6169         if (res->acl_scratch != NULL) {
6170                 void *p = page_address(res->acl_scratch);
6171                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6172         }
6173         status = decode_compound_hdr(xdr, &hdr);
6174         if (status)
6175                 goto out;
6176         status = decode_sequence(xdr, &res->seq_res, rqstp);
6177         if (status)
6178                 goto out;
6179         status = decode_putfh(xdr);
6180         if (status)
6181                 goto out;
6182         status = decode_getacl(xdr, rqstp, res);
6183
6184 out:
6185         return status;
6186 }
6187
6188 /*
6189  * Decode CLOSE response
6190  */
6191 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6192                               struct nfs_closeres *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_close(xdr, res);
6207         if (status != 0)
6208                 goto out;
6209         /*
6210          * Note: Server may do delete on close for this file
6211          *      in which case the getattr call will fail with
6212          *      an ESTALE error. Shouldn't be a problem,
6213          *      though, since fattr->valid will remain unset.
6214          */
6215         decode_getfattr(xdr, res->fattr, res->server);
6216 out:
6217         return status;
6218 }
6219
6220 /*
6221  * Decode OPEN response
6222  */
6223 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6224                              struct nfs_openres *res)
6225 {
6226         struct compound_hdr hdr;
6227         int status;
6228
6229         status = decode_compound_hdr(xdr, &hdr);
6230         if (status)
6231                 goto out;
6232         status = decode_sequence(xdr, &res->seq_res, rqstp);
6233         if (status)
6234                 goto out;
6235         status = decode_putfh(xdr);
6236         if (status)
6237                 goto out;
6238         status = decode_open(xdr, res);
6239         if (status)
6240                 goto out;
6241         status = decode_getfh(xdr, &res->fh);
6242         if (status)
6243                 goto out;
6244         if (res->access_request)
6245                 decode_access(xdr, &res->access_supported, &res->access_result);
6246         decode_getfattr(xdr, res->f_attr, res->server);
6247 out:
6248         return status;
6249 }
6250
6251 /*
6252  * Decode OPEN_CONFIRM response
6253  */
6254 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6255                                      struct xdr_stream *xdr,
6256                                      struct nfs_open_confirmres *res)
6257 {
6258         struct compound_hdr hdr;
6259         int status;
6260
6261         status = decode_compound_hdr(xdr, &hdr);
6262         if (status)
6263                 goto out;
6264         status = decode_putfh(xdr);
6265         if (status)
6266                 goto out;
6267         status = decode_open_confirm(xdr, res);
6268 out:
6269         return status;
6270 }
6271
6272 /*
6273  * Decode OPEN response
6274  */
6275 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6276                                     struct xdr_stream *xdr,
6277                                     struct nfs_openres *res)
6278 {
6279         struct compound_hdr hdr;
6280         int status;
6281
6282         status = decode_compound_hdr(xdr, &hdr);
6283         if (status)
6284                 goto out;
6285         status = decode_sequence(xdr, &res->seq_res, rqstp);
6286         if (status)
6287                 goto out;
6288         status = decode_putfh(xdr);
6289         if (status)
6290                 goto out;
6291         status = decode_open(xdr, res);
6292         if (status)
6293                 goto out;
6294         if (res->access_request)
6295                 decode_access(xdr, &res->access_supported, &res->access_result);
6296         decode_getfattr(xdr, res->f_attr, res->server);
6297 out:
6298         return status;
6299 }
6300
6301 /*
6302  * Decode SETATTR response
6303  */
6304 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6305                                 struct xdr_stream *xdr,
6306                                 struct nfs_setattrres *res)
6307 {
6308         struct compound_hdr hdr;
6309         int status;
6310
6311         status = decode_compound_hdr(xdr, &hdr);
6312         if (status)
6313                 goto out;
6314         status = decode_sequence(xdr, &res->seq_res, rqstp);
6315         if (status)
6316                 goto out;
6317         status = decode_putfh(xdr);
6318         if (status)
6319                 goto out;
6320         status = decode_setattr(xdr);
6321         if (status)
6322                 goto out;
6323         decode_getfattr(xdr, res->fattr, res->server);
6324 out:
6325         return status;
6326 }
6327
6328 /*
6329  * Decode LOCK response
6330  */
6331 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6332                              struct nfs_lock_res *res)
6333 {
6334         struct compound_hdr hdr;
6335         int status;
6336
6337         status = decode_compound_hdr(xdr, &hdr);
6338         if (status)
6339                 goto out;
6340         status = decode_sequence(xdr, &res->seq_res, rqstp);
6341         if (status)
6342                 goto out;
6343         status = decode_putfh(xdr);
6344         if (status)
6345                 goto out;
6346         status = decode_lock(xdr, res);
6347 out:
6348         return status;
6349 }
6350
6351 /*
6352  * Decode LOCKT response
6353  */
6354 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6355                               struct nfs_lockt_res *res)
6356 {
6357         struct compound_hdr hdr;
6358         int status;
6359
6360         status = decode_compound_hdr(xdr, &hdr);
6361         if (status)
6362                 goto out;
6363         status = decode_sequence(xdr, &res->seq_res, rqstp);
6364         if (status)
6365                 goto out;
6366         status = decode_putfh(xdr);
6367         if (status)
6368                 goto out;
6369         status = decode_lockt(xdr, res);
6370 out:
6371         return status;
6372 }
6373
6374 /*
6375  * Decode LOCKU response
6376  */
6377 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6378                               struct nfs_locku_res *res)
6379 {
6380         struct compound_hdr hdr;
6381         int status;
6382
6383         status = decode_compound_hdr(xdr, &hdr);
6384         if (status)
6385                 goto out;
6386         status = decode_sequence(xdr, &res->seq_res, rqstp);
6387         if (status)
6388                 goto out;
6389         status = decode_putfh(xdr);
6390         if (status)
6391                 goto out;
6392         status = decode_locku(xdr, res);
6393 out:
6394         return status;
6395 }
6396
6397 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6398                                           struct xdr_stream *xdr, void *dummy)
6399 {
6400         struct compound_hdr hdr;
6401         int status;
6402
6403         status = decode_compound_hdr(xdr, &hdr);
6404         if (!status)
6405                 status = decode_release_lockowner(xdr);
6406         return status;
6407 }
6408
6409 /*
6410  * Decode READLINK response
6411  */
6412 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6413                                  struct xdr_stream *xdr,
6414                                  struct nfs4_readlink_res *res)
6415 {
6416         struct compound_hdr hdr;
6417         int status;
6418
6419         status = decode_compound_hdr(xdr, &hdr);
6420         if (status)
6421                 goto out;
6422         status = decode_sequence(xdr, &res->seq_res, rqstp);
6423         if (status)
6424                 goto out;
6425         status = decode_putfh(xdr);
6426         if (status)
6427                 goto out;
6428         status = decode_readlink(xdr, rqstp);
6429 out:
6430         return status;
6431 }
6432
6433 /*
6434  * Decode READDIR response
6435  */
6436 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6437                                 struct nfs4_readdir_res *res)
6438 {
6439         struct compound_hdr hdr;
6440         int status;
6441
6442         status = decode_compound_hdr(xdr, &hdr);
6443         if (status)
6444                 goto out;
6445         status = decode_sequence(xdr, &res->seq_res, rqstp);
6446         if (status)
6447                 goto out;
6448         status = decode_putfh(xdr);
6449         if (status)
6450                 goto out;
6451         status = decode_readdir(xdr, rqstp, res);
6452 out:
6453         return status;
6454 }
6455
6456 /*
6457  * Decode Read response
6458  */
6459 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6460                              struct nfs_readres *res)
6461 {
6462         struct compound_hdr hdr;
6463         int status;
6464
6465         status = decode_compound_hdr(xdr, &hdr);
6466         if (status)
6467                 goto out;
6468         status = decode_sequence(xdr, &res->seq_res, rqstp);
6469         if (status)
6470                 goto out;
6471         status = decode_putfh(xdr);
6472         if (status)
6473                 goto out;
6474         status = decode_read(xdr, rqstp, res);
6475         if (!status)
6476                 status = res->count;
6477 out:
6478         return status;
6479 }
6480
6481 /*
6482  * Decode WRITE response
6483  */
6484 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6485                               struct nfs_writeres *res)
6486 {
6487         struct compound_hdr hdr;
6488         int status;
6489
6490         status = decode_compound_hdr(xdr, &hdr);
6491         if (status)
6492                 goto out;
6493         status = decode_sequence(xdr, &res->seq_res, rqstp);
6494         if (status)
6495                 goto out;
6496         status = decode_putfh(xdr);
6497         if (status)
6498                 goto out;
6499         status = decode_write(xdr, res);
6500         if (status)
6501                 goto out;
6502         if (res->fattr)
6503                 decode_getfattr(xdr, res->fattr, res->server);
6504         if (!status)
6505                 status = res->count;
6506 out:
6507         return status;
6508 }
6509
6510 /*
6511  * Decode COMMIT response
6512  */
6513 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6514                                struct nfs_commitres *res)
6515 {
6516         struct compound_hdr hdr;
6517         int status;
6518
6519         status = decode_compound_hdr(xdr, &hdr);
6520         if (status)
6521                 goto out;
6522         status = decode_sequence(xdr, &res->seq_res, rqstp);
6523         if (status)
6524                 goto out;
6525         status = decode_putfh(xdr);
6526         if (status)
6527                 goto out;
6528         status = decode_commit(xdr, res);
6529 out:
6530         return status;
6531 }
6532
6533 /*
6534  * Decode FSINFO response
6535  */
6536 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6537                                struct nfs4_fsinfo_res *res)
6538 {
6539         struct compound_hdr hdr;
6540         int status;
6541
6542         status = decode_compound_hdr(xdr, &hdr);
6543         if (!status)
6544                 status = decode_sequence(xdr, &res->seq_res, req);
6545         if (!status)
6546                 status = decode_putfh(xdr);
6547         if (!status)
6548                 status = decode_fsinfo(xdr, res->fsinfo);
6549         return status;
6550 }
6551
6552 /*
6553  * Decode PATHCONF response
6554  */
6555 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6556                                  struct nfs4_pathconf_res *res)
6557 {
6558         struct compound_hdr hdr;
6559         int status;
6560
6561         status = decode_compound_hdr(xdr, &hdr);
6562         if (!status)
6563                 status = decode_sequence(xdr, &res->seq_res, req);
6564         if (!status)
6565                 status = decode_putfh(xdr);
6566         if (!status)
6567                 status = decode_pathconf(xdr, res->pathconf);
6568         return status;
6569 }
6570
6571 /*
6572  * Decode STATFS response
6573  */
6574 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6575                                struct nfs4_statfs_res *res)
6576 {
6577         struct compound_hdr hdr;
6578         int status;
6579
6580         status = decode_compound_hdr(xdr, &hdr);
6581         if (!status)
6582                 status = decode_sequence(xdr, &res->seq_res, req);
6583         if (!status)
6584                 status = decode_putfh(xdr);
6585         if (!status)
6586                 status = decode_statfs(xdr, res->fsstat);
6587         return status;
6588 }
6589
6590 /*
6591  * Decode GETATTR_BITMAP response
6592  */
6593 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6594                                     struct xdr_stream *xdr,
6595                                     struct nfs4_server_caps_res *res)
6596 {
6597         struct compound_hdr hdr;
6598         int status;
6599
6600         status = decode_compound_hdr(xdr, &hdr);
6601         if (status)
6602                 goto out;
6603         status = decode_sequence(xdr, &res->seq_res, req);
6604         if (status)
6605                 goto out;
6606         status = decode_putfh(xdr);
6607         if (status)
6608                 goto out;
6609         status = decode_server_caps(xdr, res);
6610 out:
6611         return status;
6612 }
6613
6614 /*
6615  * Decode RENEW response
6616  */
6617 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6618                               void *__unused)
6619 {
6620         struct compound_hdr hdr;
6621         int status;
6622
6623         status = decode_compound_hdr(xdr, &hdr);
6624         if (!status)
6625                 status = decode_renew(xdr);
6626         return status;
6627 }
6628
6629 /*
6630  * Decode SETCLIENTID response
6631  */
6632 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6633                                     struct xdr_stream *xdr,
6634                                     struct nfs4_setclientid_res *res)
6635 {
6636         struct compound_hdr hdr;
6637         int status;
6638
6639         status = decode_compound_hdr(xdr, &hdr);
6640         if (!status)
6641                 status = decode_setclientid(xdr, res);
6642         return status;
6643 }
6644
6645 /*
6646  * Decode SETCLIENTID_CONFIRM response
6647  */
6648 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6649                                             struct xdr_stream *xdr,
6650                                             struct nfs_fsinfo *fsinfo)
6651 {
6652         struct compound_hdr hdr;
6653         int status;
6654
6655         status = decode_compound_hdr(xdr, &hdr);
6656         if (!status)
6657                 status = decode_setclientid_confirm(xdr);
6658         if (!status)
6659                 status = decode_putrootfh(xdr);
6660         if (!status)
6661                 status = decode_fsinfo(xdr, fsinfo);
6662         return status;
6663 }
6664
6665 /*
6666  * Decode DELEGRETURN response
6667  */
6668 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6669                                     struct xdr_stream *xdr,
6670                                     struct nfs4_delegreturnres *res)
6671 {
6672         struct compound_hdr hdr;
6673         int status;
6674
6675         status = decode_compound_hdr(xdr, &hdr);
6676         if (status)
6677                 goto out;
6678         status = decode_sequence(xdr, &res->seq_res, rqstp);
6679         if (status)
6680                 goto out;
6681         status = decode_putfh(xdr);
6682         if (status != 0)
6683                 goto out;
6684         status = decode_getfattr(xdr, res->fattr, res->server);
6685         if (status != 0)
6686                 goto out;
6687         status = decode_delegreturn(xdr);
6688 out:
6689         return status;
6690 }
6691
6692 /*
6693  * Decode FS_LOCATIONS response
6694  */
6695 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6696                                      struct xdr_stream *xdr,
6697                                      struct nfs4_fs_locations_res *res)
6698 {
6699         struct compound_hdr hdr;
6700         int status;
6701
6702         status = decode_compound_hdr(xdr, &hdr);
6703         if (status)
6704                 goto out;
6705         status = decode_sequence(xdr, &res->seq_res, req);
6706         if (status)
6707                 goto out;
6708         status = decode_putfh(xdr);
6709         if (status)
6710                 goto out;
6711         status = decode_lookup(xdr);
6712         if (status)
6713                 goto out;
6714         xdr_enter_page(xdr, PAGE_SIZE);
6715         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6716                                          NULL, res->fs_locations,
6717                                          res->fs_locations->server);
6718 out:
6719         return status;
6720 }
6721
6722 /*
6723  * Decode SECINFO response
6724  */
6725 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6726                                 struct xdr_stream *xdr,
6727                                 struct nfs4_secinfo_res *res)
6728 {
6729         struct compound_hdr hdr;
6730         int status;
6731
6732         status = decode_compound_hdr(xdr, &hdr);
6733         if (status)
6734                 goto out;
6735         status = decode_sequence(xdr, &res->seq_res, rqstp);
6736         if (status)
6737                 goto out;
6738         status = decode_putfh(xdr);
6739         if (status)
6740                 goto out;
6741         status = decode_secinfo(xdr, res);
6742 out:
6743         return status;
6744 }
6745
6746 #if defined(CONFIG_NFS_V4_1)
6747 /*
6748  * Decode BIND_CONN_TO_SESSION response
6749  */
6750 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6751                                         struct xdr_stream *xdr,
6752                                         void *res)
6753 {
6754         struct compound_hdr hdr;
6755         int status;
6756
6757         status = decode_compound_hdr(xdr, &hdr);
6758         if (!status)
6759                 status = decode_bind_conn_to_session(xdr, res);
6760         return status;
6761 }
6762
6763 /*
6764  * Decode EXCHANGE_ID response
6765  */
6766 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6767                                     struct xdr_stream *xdr,
6768                                     void *res)
6769 {
6770         struct compound_hdr hdr;
6771         int status;
6772
6773         status = decode_compound_hdr(xdr, &hdr);
6774         if (!status)
6775                 status = decode_exchange_id(xdr, res);
6776         return status;
6777 }
6778
6779 /*
6780  * Decode CREATE_SESSION response
6781  */
6782 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6783                                        struct xdr_stream *xdr,
6784                                        struct nfs41_create_session_res *res)
6785 {
6786         struct compound_hdr hdr;
6787         int status;
6788
6789         status = decode_compound_hdr(xdr, &hdr);
6790         if (!status)
6791                 status = decode_create_session(xdr, res);
6792         return status;
6793 }
6794
6795 /*
6796  * Decode DESTROY_SESSION response
6797  */
6798 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6799                                         struct xdr_stream *xdr,
6800                                         void *res)
6801 {
6802         struct compound_hdr hdr;
6803         int status;
6804
6805         status = decode_compound_hdr(xdr, &hdr);
6806         if (!status)
6807                 status = decode_destroy_session(xdr, res);
6808         return status;
6809 }
6810
6811 /*
6812  * Decode DESTROY_CLIENTID response
6813  */
6814 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6815                                         struct xdr_stream *xdr,
6816                                         void *res)
6817 {
6818         struct compound_hdr hdr;
6819         int status;
6820
6821         status = decode_compound_hdr(xdr, &hdr);
6822         if (!status)
6823                 status = decode_destroy_clientid(xdr, res);
6824         return status;
6825 }
6826
6827 /*
6828  * Decode SEQUENCE response
6829  */
6830 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6831                                  struct xdr_stream *xdr,
6832                                  struct nfs4_sequence_res *res)
6833 {
6834         struct compound_hdr hdr;
6835         int status;
6836
6837         status = decode_compound_hdr(xdr, &hdr);
6838         if (!status)
6839                 status = decode_sequence(xdr, res, rqstp);
6840         return status;
6841 }
6842
6843 /*
6844  * Decode GET_LEASE_TIME response
6845  */
6846 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6847                                        struct xdr_stream *xdr,
6848                                        struct nfs4_get_lease_time_res *res)
6849 {
6850         struct compound_hdr hdr;
6851         int status;
6852
6853         status = decode_compound_hdr(xdr, &hdr);
6854         if (!status)
6855                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6856         if (!status)
6857                 status = decode_putrootfh(xdr);
6858         if (!status)
6859                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6860         return status;
6861 }
6862
6863 /*
6864  * Decode RECLAIM_COMPLETE response
6865  */
6866 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6867                                          struct xdr_stream *xdr,
6868                                          struct nfs41_reclaim_complete_res *res)
6869 {
6870         struct compound_hdr hdr;
6871         int status;
6872
6873         status = decode_compound_hdr(xdr, &hdr);
6874         if (!status)
6875                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6876         if (!status)
6877                 status = decode_reclaim_complete(xdr, (void *)NULL);
6878         return status;
6879 }
6880
6881 /*
6882  * Decode GETDEVICELIST response
6883  */
6884 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6885                                       struct xdr_stream *xdr,
6886                                       struct nfs4_getdevicelist_res *res)
6887 {
6888         struct compound_hdr hdr;
6889         int status;
6890
6891         dprintk("encoding getdevicelist!\n");
6892
6893         status = decode_compound_hdr(xdr, &hdr);
6894         if (status != 0)
6895                 goto out;
6896         status = decode_sequence(xdr, &res->seq_res, rqstp);
6897         if (status != 0)
6898                 goto out;
6899         status = decode_putfh(xdr);
6900         if (status != 0)
6901                 goto out;
6902         status = decode_getdevicelist(xdr, res->devlist);
6903 out:
6904         return status;
6905 }
6906
6907 /*
6908  * Decode GETDEVINFO response
6909  */
6910 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6911                                       struct xdr_stream *xdr,
6912                                       struct nfs4_getdeviceinfo_res *res)
6913 {
6914         struct compound_hdr hdr;
6915         int status;
6916
6917         status = decode_compound_hdr(xdr, &hdr);
6918         if (status != 0)
6919                 goto out;
6920         status = decode_sequence(xdr, &res->seq_res, rqstp);
6921         if (status != 0)
6922                 goto out;
6923         status = decode_getdeviceinfo(xdr, res->pdev);
6924 out:
6925         return status;
6926 }
6927
6928 /*
6929  * Decode LAYOUTGET response
6930  */
6931 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6932                                   struct xdr_stream *xdr,
6933                                   struct nfs4_layoutget_res *res)
6934 {
6935         struct compound_hdr hdr;
6936         int status;
6937
6938         status = decode_compound_hdr(xdr, &hdr);
6939         if (status)
6940                 goto out;
6941         status = decode_sequence(xdr, &res->seq_res, rqstp);
6942         if (status)
6943                 goto out;
6944         status = decode_putfh(xdr);
6945         if (status)
6946                 goto out;
6947         status = decode_layoutget(xdr, rqstp, res);
6948 out:
6949         return status;
6950 }
6951
6952 /*
6953  * Decode LAYOUTRETURN response
6954  */
6955 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6956                                      struct xdr_stream *xdr,
6957                                      struct nfs4_layoutreturn_res *res)
6958 {
6959         struct compound_hdr hdr;
6960         int status;
6961
6962         status = decode_compound_hdr(xdr, &hdr);
6963         if (status)
6964                 goto out;
6965         status = decode_sequence(xdr, &res->seq_res, rqstp);
6966         if (status)
6967                 goto out;
6968         status = decode_putfh(xdr);
6969         if (status)
6970                 goto out;
6971         status = decode_layoutreturn(xdr, res);
6972 out:
6973         return status;
6974 }
6975
6976 /*
6977  * Decode LAYOUTCOMMIT response
6978  */
6979 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6980                                      struct xdr_stream *xdr,
6981                                      struct nfs4_layoutcommit_res *res)
6982 {
6983         struct compound_hdr hdr;
6984         int status;
6985
6986         status = decode_compound_hdr(xdr, &hdr);
6987         if (status)
6988                 goto out;
6989         status = decode_sequence(xdr, &res->seq_res, rqstp);
6990         if (status)
6991                 goto out;
6992         status = decode_putfh(xdr);
6993         if (status)
6994                 goto out;
6995         status = decode_layoutcommit(xdr, rqstp, res);
6996         if (status)
6997                 goto out;
6998         decode_getfattr(xdr, res->fattr, res->server);
6999 out:
7000         return status;
7001 }
7002
7003 /*
7004  * Decode SECINFO_NO_NAME response
7005  */
7006 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7007                                         struct xdr_stream *xdr,
7008                                         struct nfs4_secinfo_res *res)
7009 {
7010         struct compound_hdr hdr;
7011         int status;
7012
7013         status = decode_compound_hdr(xdr, &hdr);
7014         if (status)
7015                 goto out;
7016         status = decode_sequence(xdr, &res->seq_res, rqstp);
7017         if (status)
7018                 goto out;
7019         status = decode_putrootfh(xdr);
7020         if (status)
7021                 goto out;
7022         status = decode_secinfo_no_name(xdr, res);
7023 out:
7024         return status;
7025 }
7026
7027 /*
7028  * Decode TEST_STATEID response
7029  */
7030 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7031                                      struct xdr_stream *xdr,
7032                                      struct nfs41_test_stateid_res *res)
7033 {
7034         struct compound_hdr hdr;
7035         int status;
7036
7037         status = decode_compound_hdr(xdr, &hdr);
7038         if (status)
7039                 goto out;
7040         status = decode_sequence(xdr, &res->seq_res, rqstp);
7041         if (status)
7042                 goto out;
7043         status = decode_test_stateid(xdr, res);
7044 out:
7045         return status;
7046 }
7047
7048 /*
7049  * Decode FREE_STATEID response
7050  */
7051 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7052                                      struct xdr_stream *xdr,
7053                                      struct nfs41_free_stateid_res *res)
7054 {
7055         struct compound_hdr hdr;
7056         int status;
7057
7058         status = decode_compound_hdr(xdr, &hdr);
7059         if (status)
7060                 goto out;
7061         status = decode_sequence(xdr, &res->seq_res, rqstp);
7062         if (status)
7063                 goto out;
7064         status = decode_free_stateid(xdr, res);
7065 out:
7066         return status;
7067 }
7068 #endif /* CONFIG_NFS_V4_1 */
7069
7070 /**
7071  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7072  *                      the local page cache.
7073  * @xdr: XDR stream where entry resides
7074  * @entry: buffer to fill in with entry data
7075  * @plus: boolean indicating whether this should be a readdirplus entry
7076  *
7077  * Returns zero if successful, otherwise a negative errno value is
7078  * returned.
7079  *
7080  * This function is not invoked during READDIR reply decoding, but
7081  * rather whenever an application invokes the getdents(2) system call
7082  * on a directory already in our cache.
7083  */
7084 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7085                        int plus)
7086 {
7087         unsigned int savep;
7088         uint32_t bitmap[3] = {0};
7089         uint32_t len;
7090         __be32 *p = xdr_inline_decode(xdr, 4);
7091         if (unlikely(!p))
7092                 goto out_overflow;
7093         if (*p == xdr_zero) {
7094                 p = xdr_inline_decode(xdr, 4);
7095                 if (unlikely(!p))
7096                         goto out_overflow;
7097                 if (*p == xdr_zero)
7098                         return -EAGAIN;
7099                 entry->eof = 1;
7100                 return -EBADCOOKIE;
7101         }
7102
7103         p = xdr_inline_decode(xdr, 12);
7104         if (unlikely(!p))
7105                 goto out_overflow;
7106         entry->prev_cookie = entry->cookie;
7107         p = xdr_decode_hyper(p, &entry->cookie);
7108         entry->len = be32_to_cpup(p);
7109
7110         p = xdr_inline_decode(xdr, entry->len);
7111         if (unlikely(!p))
7112                 goto out_overflow;
7113         entry->name = (const char *) p;
7114
7115         /*
7116          * In case the server doesn't return an inode number,
7117          * we fake one here.  (We don't use inode number 0,
7118          * since glibc seems to choke on it...)
7119          */
7120         entry->ino = 1;
7121         entry->fattr->valid = 0;
7122
7123         if (decode_attr_bitmap(xdr, bitmap) < 0)
7124                 goto out_overflow;
7125
7126         if (decode_attr_length(xdr, &len, &savep) < 0)
7127                 goto out_overflow;
7128
7129         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7130                                   NULL, entry->server) < 0)
7131                 goto out_overflow;
7132         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7133                 entry->ino = entry->fattr->mounted_on_fileid;
7134         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7135                 entry->ino = entry->fattr->fileid;
7136
7137         entry->d_type = DT_UNKNOWN;
7138         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7139                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7140
7141         return 0;
7142
7143 out_overflow:
7144         print_overflow_msg(__func__, xdr);
7145         return -EAGAIN;
7146 }
7147
7148 /*
7149  * We need to translate between nfs status return values and
7150  * the local errno values which may not be the same.
7151  */
7152 static struct {
7153         int stat;
7154         int errno;
7155 } nfs_errtbl[] = {
7156         { NFS4_OK,              0               },
7157         { NFS4ERR_PERM,         -EPERM          },
7158         { NFS4ERR_NOENT,        -ENOENT         },
7159         { NFS4ERR_IO,           -errno_NFSERR_IO},
7160         { NFS4ERR_NXIO,         -ENXIO          },
7161         { NFS4ERR_ACCESS,       -EACCES         },
7162         { NFS4ERR_EXIST,        -EEXIST         },
7163         { NFS4ERR_XDEV,         -EXDEV          },
7164         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7165         { NFS4ERR_ISDIR,        -EISDIR         },
7166         { NFS4ERR_INVAL,        -EINVAL         },
7167         { NFS4ERR_FBIG,         -EFBIG          },
7168         { NFS4ERR_NOSPC,        -ENOSPC         },
7169         { NFS4ERR_ROFS,         -EROFS          },
7170         { NFS4ERR_MLINK,        -EMLINK         },
7171         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7172         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7173         { NFS4ERR_DQUOT,        -EDQUOT         },
7174         { NFS4ERR_STALE,        -ESTALE         },
7175         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7176         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7177         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7178         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7179         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7180         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7181         { NFS4ERR_LOCKED,       -EAGAIN         },
7182         { NFS4ERR_SYMLINK,      -ELOOP          },
7183         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7184         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7185         { -1,                   -EIO            }
7186 };
7187
7188 /*
7189  * Convert an NFS error code to a local one.
7190  * This one is used jointly by NFSv2 and NFSv3.
7191  */
7192 static int
7193 nfs4_stat_to_errno(int stat)
7194 {
7195         int i;
7196         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7197                 if (nfs_errtbl[i].stat == stat)
7198                         return nfs_errtbl[i].errno;
7199         }
7200         if (stat <= 10000 || stat > 10100) {
7201                 /* The server is looney tunes. */
7202                 return -EREMOTEIO;
7203         }
7204         /* If we cannot translate the error, the recovery routines should
7205          * handle it.
7206          * Note: remaining NFSv4 error codes have values > 10000, so should
7207          * not conflict with native Linux error codes.
7208          */
7209         return -stat;
7210 }
7211
7212 #define PROC(proc, argtype, restype)                            \
7213 [NFSPROC4_CLNT_##proc] = {                                      \
7214         .p_proc   = NFSPROC4_COMPOUND,                          \
7215         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7216         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7217         .p_arglen = NFS4_##argtype##_sz,                        \
7218         .p_replen = NFS4_##restype##_sz,                        \
7219         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7220         .p_name   = #proc,                                      \
7221 }
7222
7223 struct rpc_procinfo     nfs4_procedures[] = {
7224         PROC(READ,              enc_read,               dec_read),
7225         PROC(WRITE,             enc_write,              dec_write),
7226         PROC(COMMIT,            enc_commit,             dec_commit),
7227         PROC(OPEN,              enc_open,               dec_open),
7228         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7229         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7230         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7231         PROC(CLOSE,             enc_close,              dec_close),
7232         PROC(SETATTR,           enc_setattr,            dec_setattr),
7233         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7234         PROC(RENEW,             enc_renew,              dec_renew),
7235         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7236         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7237         PROC(LOCK,              enc_lock,               dec_lock),
7238         PROC(LOCKT,             enc_lockt,              dec_lockt),
7239         PROC(LOCKU,             enc_locku,              dec_locku),
7240         PROC(ACCESS,            enc_access,             dec_access),
7241         PROC(GETATTR,           enc_getattr,            dec_getattr),
7242         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7243         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7244         PROC(REMOVE,            enc_remove,             dec_remove),
7245         PROC(RENAME,            enc_rename,             dec_rename),
7246         PROC(LINK,              enc_link,               dec_link),
7247         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7248         PROC(CREATE,            enc_create,             dec_create),
7249         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7250         PROC(STATFS,            enc_statfs,             dec_statfs),
7251         PROC(READLINK,          enc_readlink,           dec_readlink),
7252         PROC(READDIR,           enc_readdir,            dec_readdir),
7253         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7254         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7255         PROC(GETACL,            enc_getacl,             dec_getacl),
7256         PROC(SETACL,            enc_setacl,             dec_setacl),
7257         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7258         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7259         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7260 #if defined(CONFIG_NFS_V4_1)
7261         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7262         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7263         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7264         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7265         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7266         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7267         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7268         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7269         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7270         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7271         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7272         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7273         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7274         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7275         PROC(BIND_CONN_TO_SESSION,
7276                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7277         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7278 #endif /* CONFIG_NFS_V4_1 */
7279 };
7280
7281 const struct rpc_version nfs_version4 = {
7282         .number                 = 4,
7283         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7284         .procs                  = nfs4_procedures
7285 };
7286
7287 /*
7288  * Local variables:
7289  *  c-basic-offset: 8
7290  * End:
7291  */