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_getfh_maxsz + \
 451                                 encode_getattr_maxsz)
 452 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_open_maxsz + \
 456                                 decode_getfh_maxsz + \
 457                                 decode_getattr_maxsz)
 458 #define NFS4_enc_open_confirm_sz \
 459                                 (compound_encode_hdr_maxsz + \
 460                                  encode_putfh_maxsz + \
 461                                  encode_open_confirm_maxsz)
 462 #define NFS4_dec_open_confirm_sz \
 463                                 (compound_decode_hdr_maxsz + \
 464                                  decode_putfh_maxsz + \
 465                                  decode_open_confirm_maxsz)
 466 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 467                                         encode_sequence_maxsz + \
 468                                         encode_putfh_maxsz + \
 469                                         encode_open_maxsz + \
 470                                         encode_getattr_maxsz)
 471 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 472                                         decode_sequence_maxsz + \
 473                                         decode_putfh_maxsz + \
 474                                         decode_open_maxsz + \
 475                                         decode_getattr_maxsz)
 476 #define NFS4_enc_open_downgrade_sz \
 477                                 (compound_encode_hdr_maxsz + \
 478                                  encode_sequence_maxsz + \
 479                                  encode_putfh_maxsz + \
 480                                  encode_open_downgrade_maxsz + \
 481                                  encode_getattr_maxsz)
 482 #define NFS4_dec_open_downgrade_sz \
 483                                 (compound_decode_hdr_maxsz + \
 484                                  decode_sequence_maxsz + \
 485                                  decode_putfh_maxsz + \
 486                                  decode_open_downgrade_maxsz + \
 487                                  decode_getattr_maxsz)
 488 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 489                                  encode_sequence_maxsz + \
 490                                  encode_putfh_maxsz + \
 491                                  encode_close_maxsz + \
 492                                  encode_getattr_maxsz)
 493 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 494                                  decode_sequence_maxsz + \
 495                                  decode_putfh_maxsz + \
 496                                  decode_close_maxsz + \
 497                                  decode_getattr_maxsz)
 498 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 499                                  encode_sequence_maxsz + \
 500                                  encode_putfh_maxsz + \
 501                                  encode_setattr_maxsz + \
 502                                  encode_getattr_maxsz)
 503 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 504                                  decode_sequence_maxsz + \
 505                                  decode_putfh_maxsz + \
 506                                  decode_setattr_maxsz + \
 507                                  decode_getattr_maxsz)
 508 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 509                                 encode_sequence_maxsz + \
 510                                 encode_putfh_maxsz + \
 511                                 encode_fsinfo_maxsz)
 512 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 513                                 decode_sequence_maxsz + \
 514                                 decode_putfh_maxsz + \
 515                                 decode_fsinfo_maxsz)
 516 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 517                                 encode_renew_maxsz)
 518 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 519                                 decode_renew_maxsz)
 520 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 521                                 encode_setclientid_maxsz)
 522 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 523                                 decode_setclientid_maxsz)
 524 #define NFS4_enc_setclientid_confirm_sz \
 525                                 (compound_encode_hdr_maxsz + \
 526                                 encode_setclientid_confirm_maxsz + \
 527                                 encode_putrootfh_maxsz + \
 528                                 encode_fsinfo_maxsz)
 529 #define NFS4_dec_setclientid_confirm_sz \
 530                                 (compound_decode_hdr_maxsz + \
 531                                 decode_setclientid_confirm_maxsz + \
 532                                 decode_putrootfh_maxsz + \
 533                                 decode_fsinfo_maxsz)
 534 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 535                                 encode_sequence_maxsz + \
 536                                 encode_putfh_maxsz + \
 537                                 encode_lock_maxsz)
 538 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 539                                 decode_sequence_maxsz + \
 540                                 decode_putfh_maxsz + \
 541                                 decode_lock_maxsz)
 542 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 543                                 encode_sequence_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_lockt_maxsz)
 546 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 547                                  decode_sequence_maxsz + \
 548                                  decode_putfh_maxsz + \
 549                                  decode_lockt_maxsz)
 550 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 551                                 encode_sequence_maxsz + \
 552                                 encode_putfh_maxsz + \
 553                                 encode_locku_maxsz)
 554 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 555                                 decode_sequence_maxsz + \
 556                                 decode_putfh_maxsz + \
 557                                 decode_locku_maxsz)
 558 #define NFS4_enc_release_lockowner_sz \
 559                                 (compound_encode_hdr_maxsz + \
 560                                  encode_lockowner_maxsz)
 561 #define NFS4_dec_release_lockowner_sz \
 562                                 (compound_decode_hdr_maxsz + \
 563                                  decode_lockowner_maxsz)
 564 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 565                                 encode_sequence_maxsz + \
 566                                 encode_putfh_maxsz + \
 567                                 encode_access_maxsz + \
 568                                 encode_getattr_maxsz)
 569 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 570                                 decode_sequence_maxsz + \
 571                                 decode_putfh_maxsz + \
 572                                 decode_access_maxsz + \
 573                                 decode_getattr_maxsz)
 574 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 575                                 encode_sequence_maxsz + \
 576                                 encode_putfh_maxsz + \
 577                                 encode_getattr_maxsz)
 578 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 579                                 decode_sequence_maxsz + \
 580                                 decode_putfh_maxsz + \
 581                                 decode_getattr_maxsz)
 582 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 583                                 encode_sequence_maxsz + \
 584                                 encode_putfh_maxsz + \
 585                                 encode_lookup_maxsz + \
 586                                 encode_getattr_maxsz + \
 587                                 encode_getfh_maxsz)
 588 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 589                                 decode_sequence_maxsz + \
 590                                 decode_putfh_maxsz + \
 591                                 decode_lookup_maxsz + \
 592                                 decode_getattr_maxsz + \
 593                                 decode_getfh_maxsz)
 594 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 595                                 encode_sequence_maxsz + \
 596                                 encode_putrootfh_maxsz + \
 597                                 encode_getattr_maxsz + \
 598                                 encode_getfh_maxsz)
 599 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 600                                 decode_sequence_maxsz + \
 601                                 decode_putrootfh_maxsz + \
 602                                 decode_getattr_maxsz + \
 603                                 decode_getfh_maxsz)
 604 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_remove_maxsz)
 608 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_remove_maxsz)
 612 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_savefh_maxsz + \
 616                                 encode_putfh_maxsz + \
 617                                 encode_rename_maxsz)
 618 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 619                                 decode_sequence_maxsz + \
 620                                 decode_putfh_maxsz + \
 621                                 decode_savefh_maxsz + \
 622                                 decode_putfh_maxsz + \
 623                                 decode_rename_maxsz)
 624 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 625                                 encode_sequence_maxsz + \
 626                                 encode_putfh_maxsz + \
 627                                 encode_savefh_maxsz + \
 628                                 encode_putfh_maxsz + \
 629                                 encode_link_maxsz + \
 630                                 encode_restorefh_maxsz + \
 631                                 encode_getattr_maxsz)
 632 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 633                                 decode_sequence_maxsz + \
 634                                 decode_putfh_maxsz + \
 635                                 decode_savefh_maxsz + \
 636                                 decode_putfh_maxsz + \
 637                                 decode_link_maxsz + \
 638                                 decode_restorefh_maxsz + \
 639                                 decode_getattr_maxsz)
 640 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 641                                 encode_sequence_maxsz + \
 642                                 encode_putfh_maxsz + \
 643                                 encode_symlink_maxsz + \
 644                                 encode_getattr_maxsz + \
 645                                 encode_getfh_maxsz)
 646 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 647                                 decode_sequence_maxsz + \
 648                                 decode_putfh_maxsz + \
 649                                 decode_symlink_maxsz + \
 650                                 decode_getattr_maxsz + \
 651                                 decode_getfh_maxsz)
 652 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 653                                 encode_sequence_maxsz + \
 654                                 encode_putfh_maxsz + \
 655                                 encode_create_maxsz + \
 656                                 encode_getfh_maxsz + \
 657                                 encode_getattr_maxsz)
 658 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 659                                 decode_sequence_maxsz + \
 660                                 decode_putfh_maxsz + \
 661                                 decode_create_maxsz + \
 662                                 decode_getfh_maxsz + \
 663                                 decode_getattr_maxsz)
 664 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 665                                 encode_sequence_maxsz + \
 666                                 encode_putfh_maxsz + \
 667                                 encode_getattr_maxsz)
 668 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 669                                 decode_sequence_maxsz + \
 670                                 decode_putfh_maxsz + \
 671                                 decode_getattr_maxsz)
 672 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 673                                 encode_sequence_maxsz + \
 674                                 encode_putfh_maxsz + \
 675                                 encode_statfs_maxsz)
 676 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 677                                 decode_sequence_maxsz + \
 678                                 decode_putfh_maxsz + \
 679                                 decode_statfs_maxsz)
 680 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 681                                 encode_sequence_maxsz + \
 682                                 encode_putfh_maxsz + \
 683                                 encode_getattr_maxsz)
 684 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 685                                 decode_sequence_maxsz + \
 686                                 decode_putfh_maxsz + \
 687                                 decode_getattr_maxsz)
 688 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 689                                 encode_sequence_maxsz + \
 690                                 encode_putfh_maxsz + \
 691                                 encode_delegreturn_maxsz + \
 692                                 encode_getattr_maxsz)
 693 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 694                                 decode_sequence_maxsz + \
 695                                 decode_delegreturn_maxsz + \
 696                                 decode_getattr_maxsz)
 697 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_getacl_maxsz)
 701 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_getacl_maxsz)
 705 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 706                                 encode_sequence_maxsz + \
 707                                 encode_putfh_maxsz + \
 708                                 encode_setacl_maxsz)
 709 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 710                                 decode_sequence_maxsz + \
 711                                 decode_putfh_maxsz + \
 712                                 decode_setacl_maxsz)
 713 #define NFS4_enc_fs_locations_sz \
 714                                 (compound_encode_hdr_maxsz + \
 715                                  encode_sequence_maxsz + \
 716                                  encode_putfh_maxsz + \
 717                                  encode_lookup_maxsz + \
 718                                  encode_fs_locations_maxsz)
 719 #define NFS4_dec_fs_locations_sz \
 720                                 (compound_decode_hdr_maxsz + \
 721                                  decode_sequence_maxsz + \
 722                                  decode_putfh_maxsz + \
 723                                  decode_lookup_maxsz + \
 724                                  decode_fs_locations_maxsz)
 725 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 726                                 encode_sequence_maxsz + \
 727                                 encode_putfh_maxsz + \
 728                                 encode_secinfo_maxsz)
 729 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 730                                 decode_sequence_maxsz + \
 731                                 decode_putfh_maxsz + \
 732                                 decode_secinfo_maxsz)
 733 #if defined(CONFIG_NFS_V4_1)
 734 #define NFS4_enc_bind_conn_to_session_sz \
 735                                 (compound_encode_hdr_maxsz + \
 736                                  encode_bind_conn_to_session_maxsz)
 737 #define NFS4_dec_bind_conn_to_session_sz \
 738                                 (compound_decode_hdr_maxsz + \
 739                                  decode_bind_conn_to_session_maxsz)
 740 #define NFS4_enc_exchange_id_sz \
 741                                 (compound_encode_hdr_maxsz + \
 742                                  encode_exchange_id_maxsz)
 743 #define NFS4_dec_exchange_id_sz \
 744                                 (compound_decode_hdr_maxsz + \
 745                                  decode_exchange_id_maxsz)
 746 #define NFS4_enc_create_session_sz \
 747                                 (compound_encode_hdr_maxsz + \
 748                                  encode_create_session_maxsz)
 749 #define NFS4_dec_create_session_sz \
 750                                 (compound_decode_hdr_maxsz + \
 751                                  decode_create_session_maxsz)
 752 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 753                                          encode_destroy_session_maxsz)
 754 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 755                                          decode_destroy_session_maxsz)
 756 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 757                                          encode_destroy_clientid_maxsz)
 758 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 759                                          decode_destroy_clientid_maxsz)
 760 #define NFS4_enc_sequence_sz \
 761                                 (compound_decode_hdr_maxsz + \
 762                                  encode_sequence_maxsz)
 763 #define NFS4_dec_sequence_sz \
 764                                 (compound_decode_hdr_maxsz + \
 765                                  decode_sequence_maxsz)
 766 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 767                                          encode_sequence_maxsz + \
 768                                          encode_putrootfh_maxsz + \
 769                                          encode_fsinfo_maxsz)
 770 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 771                                          decode_sequence_maxsz + \
 772                                          decode_putrootfh_maxsz + \
 773                                          decode_fsinfo_maxsz)
 774 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 775                                          encode_sequence_maxsz + \
 776                                          encode_reclaim_complete_maxsz)
 777 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 778                                          decode_sequence_maxsz + \
 779                                          decode_reclaim_complete_maxsz)
 780 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 781                                 encode_sequence_maxsz + \
 782                                 encode_putfh_maxsz + \
 783                                 encode_getdevicelist_maxsz)
 784 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 785                                 decode_sequence_maxsz + \
 786                                 decode_putfh_maxsz + \
 787                                 decode_getdevicelist_maxsz)
 788 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 789                                 encode_sequence_maxsz +\
 790                                 encode_getdeviceinfo_maxsz)
 791 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 792                                 decode_sequence_maxsz + \
 793                                 decode_getdeviceinfo_maxsz)
 794 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 795                                 encode_sequence_maxsz + \
 796                                 encode_putfh_maxsz +        \
 797                                 encode_layoutget_maxsz)
 798 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 799                                 decode_sequence_maxsz + \
 800                                 decode_putfh_maxsz +        \
 801                                 decode_layoutget_maxsz)
 802 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 803                                 encode_sequence_maxsz +\
 804                                 encode_putfh_maxsz + \
 805                                 encode_layoutcommit_maxsz + \
 806                                 encode_getattr_maxsz)
 807 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 808                                 decode_sequence_maxsz + \
 809                                 decode_putfh_maxsz + \
 810                                 decode_layoutcommit_maxsz + \
 811                                 decode_getattr_maxsz)
 812 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 813                                 encode_sequence_maxsz + \
 814                                 encode_putfh_maxsz + \
 815                                 encode_layoutreturn_maxsz)
 816 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 817                                 decode_sequence_maxsz + \
 818                                 decode_putfh_maxsz + \
 819                                 decode_layoutreturn_maxsz)
 820 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 821                                         encode_sequence_maxsz + \
 822                                         encode_putrootfh_maxsz +\
 823                                         encode_secinfo_no_name_maxsz)
 824 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 825                                         decode_sequence_maxsz + \
 826                                         decode_putrootfh_maxsz + \
 827                                         decode_secinfo_no_name_maxsz)
 828 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 829                                          encode_sequence_maxsz + \
 830                                          encode_test_stateid_maxsz)
 831 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 832                                          decode_sequence_maxsz + \
 833                                          decode_test_stateid_maxsz)
 834 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 835                                          encode_sequence_maxsz + \
 836                                          encode_free_stateid_maxsz)
 837 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 838                                          decode_sequence_maxsz + \
 839                                          decode_free_stateid_maxsz)
 840
 841 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 842                                       compound_encode_hdr_maxsz +
 843                                       encode_sequence_maxsz +
 844                                       encode_putfh_maxsz +
 845                                       encode_getattr_maxsz) *
 846                                      XDR_UNIT);
 847
 848 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 849                                      compound_decode_hdr_maxsz +
 850                                      decode_sequence_maxsz +
 851                                      decode_putfh_maxsz) *
 852                                     XDR_UNIT);
 853 #endif /* CONFIG_NFS_V4_1 */
 854
 855 static unsigned short send_implementation_id = 1;
 856
 857 module_param(send_implementation_id, ushort, 0644);
 858 MODULE_PARM_DESC(send_implementation_id,
 859                 "Send implementation ID with NFSv4.1 exchange_id");
 860
 861 static const umode_t nfs_type2fmt[] = {
 862         [NF4BAD] = 0,
 863         [NF4REG] = S_IFREG,
 864         [NF4DIR] = S_IFDIR,
 865         [NF4BLK] = S_IFBLK,
 866         [NF4CHR] = S_IFCHR,
 867         [NF4LNK] = S_IFLNK,
 868         [NF4SOCK] = S_IFSOCK,
 869         [NF4FIFO] = S_IFIFO,
 870         [NF4ATTRDIR] = 0,
 871         [NF4NAMEDATTR] = 0,
 872 };
 873
 874 struct compound_hdr {
 875         int32_t         status;
 876         uint32_t        nops;
 877         __be32 *        nops_p;
 878         uint32_t        taglen;
 879         char *          tag;
 880         uint32_t        replen;         /* expected reply words */
 881         u32             minorversion;
 882 };
 883
 884 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 885 {
 886         __be32 *p = xdr_reserve_space(xdr, nbytes);
 887         BUG_ON(!p);
 888         return p;
 889 }
 890
 891 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 892 {
 893         __be32 *p;
 894
 895         p = xdr_reserve_space(xdr, len);
 896         xdr_encode_opaque_fixed(p, buf, len);
 897 }
 898
 899 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 900 {
 901         __be32 *p;
 902
 903         p = reserve_space(xdr, 4 + len);
 904         xdr_encode_opaque(p, str, len);
 905 }
 906
 907 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 908 {
 909         __be32 *p;
 910
 911         p = reserve_space(xdr, 4);
 912         *p = cpu_to_be32(n);
 913 }
 914
 915 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 916 {
 917         __be32 *p;
 918
 919         p = reserve_space(xdr, 8);
 920         xdr_encode_hyper(p, n);
 921 }
 922
 923 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 924                 const struct nfs_seqid *seqid)
 925 {
 926         encode_uint32(xdr, seqid->sequence->counter);
 927 }
 928
 929 static void encode_compound_hdr(struct xdr_stream *xdr,
 930                                 struct rpc_rqst *req,
 931                                 struct compound_hdr *hdr)
 932 {
 933         __be32 *p;
 934         struct rpc_auth *auth = req->rq_cred->cr_auth;
 935
 936         /* initialize running count of expected bytes in reply.
 937          * NOTE: the replied tag SHOULD be the same is the one sent,
 938          * but this is not required as a MUST for the server to do so. */
 939         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 940
 941         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 942         encode_string(xdr, hdr->taglen, hdr->tag);
 943         p = reserve_space(xdr, 8);
 944         *p++ = cpu_to_be32(hdr->minorversion);
 945         hdr->nops_p = p;
 946         *p = cpu_to_be32(hdr->nops);
 947 }
 948
 949 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 950                 uint32_t replen,
 951                 struct compound_hdr *hdr)
 952 {
 953         encode_uint32(xdr, op);
 954         hdr->nops++;
 955         hdr->replen += replen;
 956 }
 957
 958 static void encode_nops(struct compound_hdr *hdr)
 959 {
 960         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 961         *hdr->nops_p = htonl(hdr->nops);
 962 }
 963
 964 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 965 {
 966         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 967 }
 968
 969 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 970 {
 971         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 972 }
 973
 974 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 975 {
 976         char owner_name[IDMAP_NAMESZ];
 977         char owner_group[IDMAP_NAMESZ];
 978         int owner_namelen = 0;
 979         int owner_grouplen = 0;
 980         __be32 *p;
 981         __be32 *q;
 982         int len;
 983         uint32_t bmval0 = 0;
 984         uint32_t bmval1 = 0;
 985
 986         /*
 987          * We reserve enough space to write the entire attribute buffer at once.
 988          * In the worst-case, this would be
 989          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 990          *          = 36 bytes, plus any contribution from variable-length fields
 991          *            such as owner/group.
 992          */
 993         len = 16;
 994
 995         /* Sigh */
 996         if (iap->ia_valid & ATTR_SIZE)
 997                 len += 8;
 998         if (iap->ia_valid & ATTR_MODE)
 999                 len += 4;
1000         if (iap->ia_valid & ATTR_UID) {
1001                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1002                 if (owner_namelen < 0) {
1003                         dprintk("nfs: couldn't resolve uid %d to string\n",
1004                                         iap->ia_uid);
1005                         /* XXX */
1006                         strcpy(owner_name, "nobody");
1007                         owner_namelen = sizeof("nobody") - 1;
1008                         /* goto out; */
1009                 }
1010                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1011         }
1012         if (iap->ia_valid & ATTR_GID) {
1013                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1014                 if (owner_grouplen < 0) {
1015                         dprintk("nfs: couldn't resolve gid %d to string\n",
1016                                         iap->ia_gid);
1017                         strcpy(owner_group, "nobody");
1018                         owner_grouplen = sizeof("nobody") - 1;
1019                         /* goto out; */
1020                 }
1021                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1022         }
1023         if (iap->ia_valid & ATTR_ATIME_SET)
1024                 len += 16;
1025         else if (iap->ia_valid & ATTR_ATIME)
1026                 len += 4;
1027         if (iap->ia_valid & ATTR_MTIME_SET)
1028                 len += 16;
1029         else if (iap->ia_valid & ATTR_MTIME)
1030                 len += 4;
1031         p = reserve_space(xdr, len);
1032
1033         /*
1034          * We write the bitmap length now, but leave the bitmap and the attribute
1035          * buffer length to be backfilled at the end of this routine.
1036          */
1037         *p++ = cpu_to_be32(2);
1038         q = p;
1039         p += 3;
1040
1041         if (iap->ia_valid & ATTR_SIZE) {
1042                 bmval0 |= FATTR4_WORD0_SIZE;
1043                 p = xdr_encode_hyper(p, iap->ia_size);
1044         }
1045         if (iap->ia_valid & ATTR_MODE) {
1046                 bmval1 |= FATTR4_WORD1_MODE;
1047                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1048         }
1049         if (iap->ia_valid & ATTR_UID) {
1050                 bmval1 |= FATTR4_WORD1_OWNER;
1051                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1052         }
1053         if (iap->ia_valid & ATTR_GID) {
1054                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1055                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1056         }
1057         if (iap->ia_valid & ATTR_ATIME_SET) {
1058                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1059                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1060                 *p++ = cpu_to_be32(0);
1061                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1062                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1063         }
1064         else if (iap->ia_valid & ATTR_ATIME) {
1065                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1066                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1067         }
1068         if (iap->ia_valid & ATTR_MTIME_SET) {
1069                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1070                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1071                 *p++ = cpu_to_be32(0);
1072                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1073                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1074         }
1075         else if (iap->ia_valid & ATTR_MTIME) {
1076                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1077                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1078         }
1079
1080         /*
1081          * Now we backfill the bitmap and the attribute buffer length.
1082          */
1083         if (len != ((char *)p - (char *)q) + 4) {
1084                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1085                                 len, ((char *)p - (char *)q) + 4);
1086                 BUG();
1087         }
1088         len = (char *)p - (char *)q - 12;
1089         *q++ = htonl(bmval0);
1090         *q++ = htonl(bmval1);
1091         *q = htonl(len);
1092
1093 /* out: */
1094 }
1095
1096 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1097 {
1098         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1099         encode_uint32(xdr, access);
1100 }
1101
1102 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1103 {
1104         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1105         encode_nfs4_seqid(xdr, arg->seqid);
1106         encode_nfs4_stateid(xdr, arg->stateid);
1107 }
1108
1109 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1110 {
1111         __be32 *p;
1112
1113         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1114         p = reserve_space(xdr, 12);
1115         p = xdr_encode_hyper(p, args->offset);
1116         *p = cpu_to_be32(args->count);
1117 }
1118
1119 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1120 {
1121         __be32 *p;
1122
1123         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1124         encode_uint32(xdr, create->ftype);
1125
1126         switch (create->ftype) {
1127         case NF4LNK:
1128                 p = reserve_space(xdr, 4);
1129                 *p = cpu_to_be32(create->u.symlink.len);
1130                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1131                 break;
1132
1133         case NF4BLK: case NF4CHR:
1134                 p = reserve_space(xdr, 8);
1135                 *p++ = cpu_to_be32(create->u.device.specdata1);
1136                 *p = cpu_to_be32(create->u.device.specdata2);
1137                 break;
1138
1139         default:
1140                 break;
1141         }
1142
1143         encode_string(xdr, create->name->len, create->name->name);
1144         encode_attrs(xdr, create->attrs, create->server);
1145 }
1146
1147 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1148 {
1149         __be32 *p;
1150
1151         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1152         p = reserve_space(xdr, 8);
1153         *p++ = cpu_to_be32(1);
1154         *p = cpu_to_be32(bitmap);
1155 }
1156
1157 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1158 {
1159         __be32 *p;
1160
1161         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1162         p = reserve_space(xdr, 12);
1163         *p++ = cpu_to_be32(2);
1164         *p++ = cpu_to_be32(bm0);
1165         *p = cpu_to_be32(bm1);
1166 }
1167
1168 static void
1169 encode_getattr_three(struct xdr_stream *xdr,
1170                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1171                      struct compound_hdr *hdr)
1172 {
1173         __be32 *p;
1174
1175         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1176         if (bm2) {
1177                 p = reserve_space(xdr, 16);
1178                 *p++ = cpu_to_be32(3);
1179                 *p++ = cpu_to_be32(bm0);
1180                 *p++ = cpu_to_be32(bm1);
1181                 *p = cpu_to_be32(bm2);
1182         } else if (bm1) {
1183                 p = reserve_space(xdr, 12);
1184                 *p++ = cpu_to_be32(2);
1185                 *p++ = cpu_to_be32(bm0);
1186                 *p = cpu_to_be32(bm1);
1187         } else {
1188                 p = reserve_space(xdr, 8);
1189                 *p++ = cpu_to_be32(1);
1190                 *p = cpu_to_be32(bm0);
1191         }
1192 }
1193
1194 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1195 {
1196         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1197                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1198 }
1199
1200 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1201                                  const u32 *open_bitmap,
1202                                  struct compound_hdr *hdr)
1203 {
1204         encode_getattr_three(xdr,
1205                              bitmask[0] & open_bitmap[0],
1206                              bitmask[1] & open_bitmap[1],
1207                              bitmask[2] & open_bitmap[2],
1208                              hdr);
1209 }
1210
1211 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1212 {
1213         encode_getattr_three(xdr,
1214                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1215                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1216                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1217                              hdr);
1218 }
1219
1220 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1221 {
1222         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1223                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1224 }
1225
1226 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1227 {
1228         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1229 }
1230
1231 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1232 {
1233         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1234         encode_string(xdr, name->len, name->name);
1235 }
1236
1237 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1238 {
1239         if (fl->fl_type == F_RDLCK)
1240                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1241         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1242 }
1243
1244 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1245 {
1246         if (fl->fl_end == OFFSET_MAX)
1247                 return ~(uint64_t)0;
1248         return fl->fl_end - fl->fl_start + 1;
1249 }
1250
1251 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1252 {
1253         __be32 *p;
1254
1255         p = reserve_space(xdr, 32);
1256         p = xdr_encode_hyper(p, lowner->clientid);
1257         *p++ = cpu_to_be32(20);
1258         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1259         *p++ = cpu_to_be32(lowner->s_dev);
1260         xdr_encode_hyper(p, lowner->id);
1261 }
1262
1263 /*
1264  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1265  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1266  */
1267 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1268 {
1269         __be32 *p;
1270
1271         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1272         p = reserve_space(xdr, 28);
1273         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1274         *p++ = cpu_to_be32(args->reclaim);
1275         p = xdr_encode_hyper(p, args->fl->fl_start);
1276         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1277         *p = cpu_to_be32(args->new_lock_owner);
1278         if (args->new_lock_owner){
1279                 encode_nfs4_seqid(xdr, args->open_seqid);
1280                 encode_nfs4_stateid(xdr, args->open_stateid);
1281                 encode_nfs4_seqid(xdr, args->lock_seqid);
1282                 encode_lockowner(xdr, &args->lock_owner);
1283         }
1284         else {
1285                 encode_nfs4_stateid(xdr, args->lock_stateid);
1286                 encode_nfs4_seqid(xdr, args->lock_seqid);
1287         }
1288 }
1289
1290 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1291 {
1292         __be32 *p;
1293
1294         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1295         p = reserve_space(xdr, 20);
1296         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1297         p = xdr_encode_hyper(p, args->fl->fl_start);
1298         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299         encode_lockowner(xdr, &args->lock_owner);
1300 }
1301
1302 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1303 {
1304         __be32 *p;
1305
1306         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1307         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1308         encode_nfs4_seqid(xdr, args->seqid);
1309         encode_nfs4_stateid(xdr, args->stateid);
1310         p = reserve_space(xdr, 16);
1311         p = xdr_encode_hyper(p, args->fl->fl_start);
1312         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1313 }
1314
1315 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1316 {
1317         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1318         encode_lockowner(xdr, lowner);
1319 }
1320
1321 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1322 {
1323         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1324         encode_string(xdr, name->len, name->name);
1325 }
1326
1327 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1328 {
1329         __be32 *p;
1330
1331         p = reserve_space(xdr, 8);
1332         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1333         case FMODE_READ:
1334                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1335                 break;
1336         case FMODE_WRITE:
1337                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1338                 break;
1339         case FMODE_READ|FMODE_WRITE:
1340                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1341                 break;
1342         default:
1343                 *p++ = cpu_to_be32(0);
1344         }
1345         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1346 }
1347
1348 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1349 {
1350         __be32 *p;
1351  /*
1352  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1353  * owner 4 = 32
1354  */
1355         encode_nfs4_seqid(xdr, arg->seqid);
1356         encode_share_access(xdr, arg->fmode);
1357         p = reserve_space(xdr, 36);
1358         p = xdr_encode_hyper(p, arg->clientid);
1359         *p++ = cpu_to_be32(24);
1360         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1361         *p++ = cpu_to_be32(arg->server->s_dev);
1362         *p++ = cpu_to_be32(arg->id.uniquifier);
1363         xdr_encode_hyper(p, arg->id.create_time);
1364 }
1365
1366 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1367 {
1368         __be32 *p;
1369         struct nfs_client *clp;
1370
1371         p = reserve_space(xdr, 4);
1372         switch(arg->open_flags & O_EXCL) {
1373         case 0:
1374                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1375                 encode_attrs(xdr, arg->u.attrs, arg->server);
1376                 break;
1377         default:
1378                 clp = arg->server->nfs_client;
1379                 if (clp->cl_mvops->minor_version > 0) {
1380                         if (nfs4_has_persistent_session(clp)) {
1381                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1382                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1383                         } else {
1384                                 struct iattr dummy;
1385
1386                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1387                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1388                                 dummy.ia_valid = 0;
1389                                 encode_attrs(xdr, &dummy, arg->server);
1390                         }
1391                 } else {
1392                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1393                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1394                 }
1395         }
1396 }
1397
1398 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch (arg->open_flags & O_CREAT) {
1404         case 0:
1405                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1406                 break;
1407         default:
1408                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1409                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1410                 encode_createmode(xdr, arg);
1411         }
1412 }
1413
1414 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1415 {
1416         __be32 *p;
1417
1418         p = reserve_space(xdr, 4);
1419         switch (delegation_type) {
1420         case 0:
1421                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1422                 break;
1423         case FMODE_READ:
1424                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1425                 break;
1426         case FMODE_WRITE|FMODE_READ:
1427                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1428                 break;
1429         default:
1430                 BUG();
1431         }
1432 }
1433
1434 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1435 {
1436         __be32 *p;
1437
1438         p = reserve_space(xdr, 4);
1439         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1440         encode_string(xdr, name->len, name->name);
1441 }
1442
1443 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1444 {
1445         __be32 *p;
1446
1447         p = reserve_space(xdr, 4);
1448         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1449         encode_delegation_type(xdr, type);
1450 }
1451
1452 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1453 {
1454         __be32 *p;
1455
1456         p = reserve_space(xdr, 4);
1457         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1458         encode_nfs4_stateid(xdr, stateid);
1459         encode_string(xdr, name->len, name->name);
1460 }
1461
1462 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1463 {
1464         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1465         encode_openhdr(xdr, arg);
1466         encode_opentype(xdr, arg);
1467         switch (arg->claim) {
1468         case NFS4_OPEN_CLAIM_NULL:
1469                 encode_claim_null(xdr, arg->name);
1470                 break;
1471         case NFS4_OPEN_CLAIM_PREVIOUS:
1472                 encode_claim_previous(xdr, arg->u.delegation_type);
1473                 break;
1474         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1475                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1476                 break;
1477         default:
1478                 BUG();
1479         }
1480 }
1481
1482 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1483 {
1484         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1485         encode_nfs4_stateid(xdr, arg->stateid);
1486         encode_nfs4_seqid(xdr, arg->seqid);
1487 }
1488
1489 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1490 {
1491         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1492         encode_nfs4_stateid(xdr, arg->stateid);
1493         encode_nfs4_seqid(xdr, arg->seqid);
1494         encode_share_access(xdr, arg->fmode);
1495 }
1496
1497 static void
1498 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1499 {
1500         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1501         encode_string(xdr, fh->size, fh->data);
1502 }
1503
1504 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1505 {
1506         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1507 }
1508
1509 static void encode_open_stateid(struct xdr_stream *xdr,
1510                 const struct nfs_open_context *ctx,
1511                 const struct nfs_lock_context *l_ctx,
1512                 fmode_t fmode,
1513                 int zero_seqid)
1514 {
1515         nfs4_stateid stateid;
1516
1517         if (ctx->state != NULL) {
1518                 nfs4_select_rw_stateid(&stateid, ctx->state,
1519                                 fmode, l_ctx->lockowner, l_ctx->pid);
1520                 if (zero_seqid)
1521                         stateid.seqid = 0;
1522                 encode_nfs4_stateid(xdr, &stateid);
1523         } else
1524                 encode_nfs4_stateid(xdr, &zero_stateid);
1525 }
1526
1527 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1528 {
1529         __be32 *p;
1530
1531         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1532         encode_open_stateid(xdr, args->context, args->lock_context,
1533                         FMODE_READ, hdr->minorversion);
1534
1535         p = reserve_space(xdr, 12);
1536         p = xdr_encode_hyper(p, args->offset);
1537         *p = cpu_to_be32(args->count);
1538 }
1539
1540 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1541 {
1542         uint32_t attrs[2] = {
1543                 FATTR4_WORD0_RDATTR_ERROR,
1544                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1545         };
1546         uint32_t dircount = readdir->count >> 1;
1547         __be32 *p, verf[2];
1548
1549         if (readdir->plus) {
1550                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1551                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1552                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1553                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1554                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1555                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1556                 dircount >>= 1;
1557         }
1558         /* Use mounted_on_fileid only if the server supports it */
1559         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1560                 attrs[0] |= FATTR4_WORD0_FILEID;
1561
1562         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1563         encode_uint64(xdr, readdir->cookie);
1564         encode_nfs4_verifier(xdr, &readdir->verifier);
1565         p = reserve_space(xdr, 20);
1566         *p++ = cpu_to_be32(dircount);
1567         *p++ = cpu_to_be32(readdir->count);
1568         *p++ = cpu_to_be32(2);
1569
1570         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1571         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1572         memcpy(verf, readdir->verifier.data, sizeof(verf));
1573         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1574                         __func__,
1575                         (unsigned long long)readdir->cookie,
1576                         verf[0], verf[1],
1577                         attrs[0] & readdir->bitmask[0],
1578                         attrs[1] & readdir->bitmask[1]);
1579 }
1580
1581 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1582 {
1583         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1584 }
1585
1586 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1587 {
1588         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1589         encode_string(xdr, name->len, name->name);
1590 }
1591
1592 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1593 {
1594         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1595         encode_string(xdr, oldname->len, oldname->name);
1596         encode_string(xdr, newname->len, newname->name);
1597 }
1598
1599 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1600                          struct compound_hdr *hdr)
1601 {
1602         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1603         encode_uint64(xdr, clid);
1604 }
1605
1606 static void
1607 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1608 {
1609         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1610 }
1611
1612 static void
1613 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1614 {
1615         __be32 *p;
1616
1617         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1618         encode_nfs4_stateid(xdr, &zero_stateid);
1619         p = reserve_space(xdr, 2*4);
1620         *p++ = cpu_to_be32(1);
1621         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1622         BUG_ON(arg->acl_len % 4);
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         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2226         encode_nops(&hdr);
2227 }
2228
2229 /*
2230  * Encode an OPEN_CONFIRM request
2231  */
2232 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2233                                       struct xdr_stream *xdr,
2234                                       struct nfs_open_confirmargs *args)
2235 {
2236         struct compound_hdr hdr = {
2237                 .nops   = 0,
2238         };
2239
2240         encode_compound_hdr(xdr, req, &hdr);
2241         encode_putfh(xdr, args->fh, &hdr);
2242         encode_open_confirm(xdr, args, &hdr);
2243         encode_nops(&hdr);
2244 }
2245
2246 /*
2247  * Encode an OPEN request with no attributes.
2248  */
2249 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2250                                      struct xdr_stream *xdr,
2251                                      struct nfs_openargs *args)
2252 {
2253         struct compound_hdr hdr = {
2254                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2255         };
2256
2257         encode_compound_hdr(xdr, req, &hdr);
2258         encode_sequence(xdr, &args->seq_args, &hdr);
2259         encode_putfh(xdr, args->fh, &hdr);
2260         encode_open(xdr, args, &hdr);
2261         encode_getfattr(xdr, args->bitmask, &hdr);
2262         encode_nops(&hdr);
2263 }
2264
2265 /*
2266  * Encode an OPEN_DOWNGRADE request
2267  */
2268 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2269                                         struct xdr_stream *xdr,
2270                                         struct nfs_closeargs *args)
2271 {
2272         struct compound_hdr hdr = {
2273                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2274         };
2275
2276         encode_compound_hdr(xdr, req, &hdr);
2277         encode_sequence(xdr, &args->seq_args, &hdr);
2278         encode_putfh(xdr, args->fh, &hdr);
2279         encode_open_downgrade(xdr, args, &hdr);
2280         encode_getfattr(xdr, args->bitmask, &hdr);
2281         encode_nops(&hdr);
2282 }
2283
2284 /*
2285  * Encode a LOCK request
2286  */
2287 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2288                               struct nfs_lock_args *args)
2289 {
2290         struct compound_hdr hdr = {
2291                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2292         };
2293
2294         encode_compound_hdr(xdr, req, &hdr);
2295         encode_sequence(xdr, &args->seq_args, &hdr);
2296         encode_putfh(xdr, args->fh, &hdr);
2297         encode_lock(xdr, args, &hdr);
2298         encode_nops(&hdr);
2299 }
2300
2301 /*
2302  * Encode a LOCKT request
2303  */
2304 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2305                                struct nfs_lockt_args *args)
2306 {
2307         struct compound_hdr hdr = {
2308                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309         };
2310
2311         encode_compound_hdr(xdr, req, &hdr);
2312         encode_sequence(xdr, &args->seq_args, &hdr);
2313         encode_putfh(xdr, args->fh, &hdr);
2314         encode_lockt(xdr, args, &hdr);
2315         encode_nops(&hdr);
2316 }
2317
2318 /*
2319  * Encode a LOCKU request
2320  */
2321 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2322                                struct nfs_locku_args *args)
2323 {
2324         struct compound_hdr hdr = {
2325                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2326         };
2327
2328         encode_compound_hdr(xdr, req, &hdr);
2329         encode_sequence(xdr, &args->seq_args, &hdr);
2330         encode_putfh(xdr, args->fh, &hdr);
2331         encode_locku(xdr, args, &hdr);
2332         encode_nops(&hdr);
2333 }
2334
2335 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2336                                            struct xdr_stream *xdr,
2337                                         struct nfs_release_lockowner_args *args)
2338 {
2339         struct compound_hdr hdr = {
2340                 .minorversion = 0,
2341         };
2342
2343         encode_compound_hdr(xdr, req, &hdr);
2344         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2345         encode_nops(&hdr);
2346 }
2347
2348 /*
2349  * Encode a READLINK request
2350  */
2351 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2352                                   const struct nfs4_readlink *args)
2353 {
2354         struct compound_hdr hdr = {
2355                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356         };
2357
2358         encode_compound_hdr(xdr, req, &hdr);
2359         encode_sequence(xdr, &args->seq_args, &hdr);
2360         encode_putfh(xdr, args->fh, &hdr);
2361         encode_readlink(xdr, args, req, &hdr);
2362
2363         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2364                         args->pgbase, args->pglen);
2365         encode_nops(&hdr);
2366 }
2367
2368 /*
2369  * Encode a READDIR request
2370  */
2371 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2372                                  const struct nfs4_readdir_arg *args)
2373 {
2374         struct compound_hdr hdr = {
2375                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2376         };
2377
2378         encode_compound_hdr(xdr, req, &hdr);
2379         encode_sequence(xdr, &args->seq_args, &hdr);
2380         encode_putfh(xdr, args->fh, &hdr);
2381         encode_readdir(xdr, args, req, &hdr);
2382
2383         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2384                          args->pgbase, args->count);
2385         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2386                         __func__, hdr.replen << 2, args->pages,
2387                         args->pgbase, args->count);
2388         encode_nops(&hdr);
2389 }
2390
2391 /*
2392  * Encode a READ request
2393  */
2394 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2395                               struct nfs_readargs *args)
2396 {
2397         struct compound_hdr hdr = {
2398                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2399         };
2400
2401         encode_compound_hdr(xdr, req, &hdr);
2402         encode_sequence(xdr, &args->seq_args, &hdr);
2403         encode_putfh(xdr, args->fh, &hdr);
2404         encode_read(xdr, args, &hdr);
2405
2406         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2407                          args->pages, args->pgbase, args->count);
2408         req->rq_rcv_buf.flags |= XDRBUF_READ;
2409         encode_nops(&hdr);
2410 }
2411
2412 /*
2413  * Encode an SETATTR request
2414  */
2415 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2416                                  struct nfs_setattrargs *args)
2417 {
2418         struct compound_hdr hdr = {
2419                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2420         };
2421
2422         encode_compound_hdr(xdr, req, &hdr);
2423         encode_sequence(xdr, &args->seq_args, &hdr);
2424         encode_putfh(xdr, args->fh, &hdr);
2425         encode_setattr(xdr, args, args->server, &hdr);
2426         encode_getfattr(xdr, args->bitmask, &hdr);
2427         encode_nops(&hdr);
2428 }
2429
2430 /*
2431  * Encode a GETACL request
2432  */
2433 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2434                                 struct nfs_getaclargs *args)
2435 {
2436         struct compound_hdr hdr = {
2437                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2438         };
2439         uint32_t replen;
2440
2441         encode_compound_hdr(xdr, req, &hdr);
2442         encode_sequence(xdr, &args->seq_args, &hdr);
2443         encode_putfh(xdr, args->fh, &hdr);
2444         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2445         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2446
2447         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2448                 args->acl_pages, args->acl_pgbase, args->acl_len);
2449
2450         encode_nops(&hdr);
2451 }
2452
2453 /*
2454  * Encode a WRITE request
2455  */
2456 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2457                                struct nfs_writeargs *args)
2458 {
2459         struct compound_hdr hdr = {
2460                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2461         };
2462
2463         encode_compound_hdr(xdr, req, &hdr);
2464         encode_sequence(xdr, &args->seq_args, &hdr);
2465         encode_putfh(xdr, args->fh, &hdr);
2466         encode_write(xdr, args, &hdr);
2467         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2468         if (args->bitmask)
2469                 encode_getfattr(xdr, args->bitmask, &hdr);
2470         encode_nops(&hdr);
2471 }
2472
2473 /*
2474  *  a COMMIT request
2475  */
2476 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2477                                 struct nfs_commitargs *args)
2478 {
2479         struct compound_hdr hdr = {
2480                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2481         };
2482
2483         encode_compound_hdr(xdr, req, &hdr);
2484         encode_sequence(xdr, &args->seq_args, &hdr);
2485         encode_putfh(xdr, args->fh, &hdr);
2486         encode_commit(xdr, args, &hdr);
2487         encode_nops(&hdr);
2488 }
2489
2490 /*
2491  * FSINFO request
2492  */
2493 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2494                                 struct nfs4_fsinfo_arg *args)
2495 {
2496         struct compound_hdr hdr = {
2497                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2498         };
2499
2500         encode_compound_hdr(xdr, req, &hdr);
2501         encode_sequence(xdr, &args->seq_args, &hdr);
2502         encode_putfh(xdr, args->fh, &hdr);
2503         encode_fsinfo(xdr, args->bitmask, &hdr);
2504         encode_nops(&hdr);
2505 }
2506
2507 /*
2508  * a PATHCONF request
2509  */
2510 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2511                                   const struct nfs4_pathconf_arg *args)
2512 {
2513         struct compound_hdr hdr = {
2514                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2515         };
2516
2517         encode_compound_hdr(xdr, req, &hdr);
2518         encode_sequence(xdr, &args->seq_args, &hdr);
2519         encode_putfh(xdr, args->fh, &hdr);
2520         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2521                            &hdr);
2522         encode_nops(&hdr);
2523 }
2524
2525 /*
2526  * a STATFS request
2527  */
2528 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2529                                 const struct nfs4_statfs_arg *args)
2530 {
2531         struct compound_hdr hdr = {
2532                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2533         };
2534
2535         encode_compound_hdr(xdr, req, &hdr);
2536         encode_sequence(xdr, &args->seq_args, &hdr);
2537         encode_putfh(xdr, args->fh, &hdr);
2538         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2539                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2540         encode_nops(&hdr);
2541 }
2542
2543 /*
2544  * GETATTR_BITMAP request
2545  */
2546 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2547                                      struct xdr_stream *xdr,
2548                                      struct nfs4_server_caps_arg *args)
2549 {
2550         struct compound_hdr hdr = {
2551                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2552         };
2553
2554         encode_compound_hdr(xdr, req, &hdr);
2555         encode_sequence(xdr, &args->seq_args, &hdr);
2556         encode_putfh(xdr, args->fhandle, &hdr);
2557         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2558                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2559                            FATTR4_WORD0_LINK_SUPPORT|
2560                            FATTR4_WORD0_SYMLINK_SUPPORT|
2561                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2562         encode_nops(&hdr);
2563 }
2564
2565 /*
2566  * a RENEW request
2567  */
2568 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2569                                struct nfs_client *clp)
2570 {
2571         struct compound_hdr hdr = {
2572                 .nops   = 0,
2573         };
2574
2575         encode_compound_hdr(xdr, req, &hdr);
2576         encode_renew(xdr, clp->cl_clientid, &hdr);
2577         encode_nops(&hdr);
2578 }
2579
2580 /*
2581  * a SETCLIENTID request
2582  */
2583 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2584                                      struct xdr_stream *xdr,
2585                                      struct nfs4_setclientid *sc)
2586 {
2587         struct compound_hdr hdr = {
2588                 .nops   = 0,
2589         };
2590
2591         encode_compound_hdr(xdr, req, &hdr);
2592         encode_setclientid(xdr, sc, &hdr);
2593         encode_nops(&hdr);
2594 }
2595
2596 /*
2597  * a SETCLIENTID_CONFIRM request
2598  */
2599 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2600                                              struct xdr_stream *xdr,
2601                                              struct nfs4_setclientid_res *arg)
2602 {
2603         struct compound_hdr hdr = {
2604                 .nops   = 0,
2605         };
2606         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2607
2608         encode_compound_hdr(xdr, req, &hdr);
2609         encode_setclientid_confirm(xdr, arg, &hdr);
2610         encode_putrootfh(xdr, &hdr);
2611         encode_fsinfo(xdr, lease_bitmap, &hdr);
2612         encode_nops(&hdr);
2613 }
2614
2615 /*
2616  * DELEGRETURN request
2617  */
2618 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2619                                      struct xdr_stream *xdr,
2620                                      const struct nfs4_delegreturnargs *args)
2621 {
2622         struct compound_hdr hdr = {
2623                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2624         };
2625
2626         encode_compound_hdr(xdr, req, &hdr);
2627         encode_sequence(xdr, &args->seq_args, &hdr);
2628         encode_putfh(xdr, args->fhandle, &hdr);
2629         encode_getfattr(xdr, args->bitmask, &hdr);
2630         encode_delegreturn(xdr, args->stateid, &hdr);
2631         encode_nops(&hdr);
2632 }
2633
2634 /*
2635  * Encode FS_LOCATIONS request
2636  */
2637 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2638                                       struct xdr_stream *xdr,
2639                                       struct nfs4_fs_locations_arg *args)
2640 {
2641         struct compound_hdr hdr = {
2642                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643         };
2644         uint32_t replen;
2645
2646         encode_compound_hdr(xdr, req, &hdr);
2647         encode_sequence(xdr, &args->seq_args, &hdr);
2648         encode_putfh(xdr, args->dir_fh, &hdr);
2649         encode_lookup(xdr, args->name, &hdr);
2650         replen = hdr.replen;    /* get the attribute into args->page */
2651         encode_fs_locations(xdr, args->bitmask, &hdr);
2652
2653         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2654                         0, PAGE_SIZE);
2655         encode_nops(&hdr);
2656 }
2657
2658 /*
2659  * Encode SECINFO request
2660  */
2661 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2662                                 struct xdr_stream *xdr,
2663                                 struct nfs4_secinfo_arg *args)
2664 {
2665         struct compound_hdr hdr = {
2666                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2667         };
2668
2669         encode_compound_hdr(xdr, req, &hdr);
2670         encode_sequence(xdr, &args->seq_args, &hdr);
2671         encode_putfh(xdr, args->dir_fh, &hdr);
2672         encode_secinfo(xdr, args->name, &hdr);
2673         encode_nops(&hdr);
2674 }
2675
2676 #if defined(CONFIG_NFS_V4_1)
2677 /*
2678  * BIND_CONN_TO_SESSION request
2679  */
2680 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2681                                 struct xdr_stream *xdr,
2682                                 struct nfs_client *clp)
2683 {
2684         struct compound_hdr hdr = {
2685                 .minorversion = clp->cl_mvops->minor_version,
2686         };
2687
2688         encode_compound_hdr(xdr, req, &hdr);
2689         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2690         encode_nops(&hdr);
2691 }
2692
2693 /*
2694  * EXCHANGE_ID request
2695  */
2696 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2697                                      struct xdr_stream *xdr,
2698                                      struct nfs41_exchange_id_args *args)
2699 {
2700         struct compound_hdr hdr = {
2701                 .minorversion = args->client->cl_mvops->minor_version,
2702         };
2703
2704         encode_compound_hdr(xdr, req, &hdr);
2705         encode_exchange_id(xdr, args, &hdr);
2706         encode_nops(&hdr);
2707 }
2708
2709 /*
2710  * a CREATE_SESSION request
2711  */
2712 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2713                                         struct xdr_stream *xdr,
2714                                         struct nfs41_create_session_args *args)
2715 {
2716         struct compound_hdr hdr = {
2717                 .minorversion = args->client->cl_mvops->minor_version,
2718         };
2719
2720         encode_compound_hdr(xdr, req, &hdr);
2721         encode_create_session(xdr, args, &hdr);
2722         encode_nops(&hdr);
2723 }
2724
2725 /*
2726  * a DESTROY_SESSION request
2727  */
2728 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2729                                          struct xdr_stream *xdr,
2730                                          struct nfs4_session *session)
2731 {
2732         struct compound_hdr hdr = {
2733                 .minorversion = session->clp->cl_mvops->minor_version,
2734         };
2735
2736         encode_compound_hdr(xdr, req, &hdr);
2737         encode_destroy_session(xdr, session, &hdr);
2738         encode_nops(&hdr);
2739 }
2740
2741 /*
2742  * a DESTROY_CLIENTID request
2743  */
2744 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2745                                          struct xdr_stream *xdr,
2746                                          struct nfs_client *clp)
2747 {
2748         struct compound_hdr hdr = {
2749                 .minorversion = clp->cl_mvops->minor_version,
2750         };
2751
2752         encode_compound_hdr(xdr, req, &hdr);
2753         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2754         encode_nops(&hdr);
2755 }
2756
2757 /*
2758  * a SEQUENCE request
2759  */
2760 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2761                                   struct nfs4_sequence_args *args)
2762 {
2763         struct compound_hdr hdr = {
2764                 .minorversion = nfs4_xdr_minorversion(args),
2765         };
2766
2767         encode_compound_hdr(xdr, req, &hdr);
2768         encode_sequence(xdr, args, &hdr);
2769         encode_nops(&hdr);
2770 }
2771
2772 /*
2773  * a GET_LEASE_TIME request
2774  */
2775 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2776                                         struct xdr_stream *xdr,
2777                                         struct nfs4_get_lease_time_args *args)
2778 {
2779         struct compound_hdr hdr = {
2780                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2781         };
2782         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2783
2784         encode_compound_hdr(xdr, req, &hdr);
2785         encode_sequence(xdr, &args->la_seq_args, &hdr);
2786         encode_putrootfh(xdr, &hdr);
2787         encode_fsinfo(xdr, lease_bitmap, &hdr);
2788         encode_nops(&hdr);
2789 }
2790
2791 /*
2792  * a RECLAIM_COMPLETE request
2793  */
2794 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2795                                           struct xdr_stream *xdr,
2796                                 struct nfs41_reclaim_complete_args *args)
2797 {
2798         struct compound_hdr hdr = {
2799                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2800         };
2801
2802         encode_compound_hdr(xdr, req, &hdr);
2803         encode_sequence(xdr, &args->seq_args, &hdr);
2804         encode_reclaim_complete(xdr, args, &hdr);
2805         encode_nops(&hdr);
2806 }
2807
2808 /*
2809  * Encode GETDEVICELIST request
2810  */
2811 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2812                                        struct xdr_stream *xdr,
2813                                        struct nfs4_getdevicelist_args *args)
2814 {
2815         struct compound_hdr hdr = {
2816                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2817         };
2818
2819         encode_compound_hdr(xdr, req, &hdr);
2820         encode_sequence(xdr, &args->seq_args, &hdr);
2821         encode_putfh(xdr, args->fh, &hdr);
2822         encode_getdevicelist(xdr, args, &hdr);
2823         encode_nops(&hdr);
2824 }
2825
2826 /*
2827  * Encode GETDEVICEINFO request
2828  */
2829 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2830                                        struct xdr_stream *xdr,
2831                                        struct nfs4_getdeviceinfo_args *args)
2832 {
2833         struct compound_hdr hdr = {
2834                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2835         };
2836
2837         encode_compound_hdr(xdr, req, &hdr);
2838         encode_sequence(xdr, &args->seq_args, &hdr);
2839         encode_getdeviceinfo(xdr, args, &hdr);
2840
2841         /* set up reply kvec. Subtract notification bitmap max size (2)
2842          * so that notification bitmap is put in xdr_buf tail */
2843         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2844                          args->pdev->pages, args->pdev->pgbase,
2845                          args->pdev->pglen);
2846
2847         encode_nops(&hdr);
2848 }
2849
2850 /*
2851  *  Encode LAYOUTGET request
2852  */
2853 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2854                                    struct xdr_stream *xdr,
2855                                    struct nfs4_layoutget_args *args)
2856 {
2857         struct compound_hdr hdr = {
2858                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2859         };
2860
2861         encode_compound_hdr(xdr, req, &hdr);
2862         encode_sequence(xdr, &args->seq_args, &hdr);
2863         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2864         encode_layoutget(xdr, args, &hdr);
2865
2866         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2867             args->layout.pages, 0, args->layout.pglen);
2868
2869         encode_nops(&hdr);
2870 }
2871
2872 /*
2873  *  Encode LAYOUTCOMMIT request
2874  */
2875 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2876                                       struct xdr_stream *xdr,
2877                                       struct nfs4_layoutcommit_args *args)
2878 {
2879         struct nfs4_layoutcommit_data *data =
2880                 container_of(args, struct nfs4_layoutcommit_data, args);
2881         struct compound_hdr hdr = {
2882                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2883         };
2884
2885         encode_compound_hdr(xdr, req, &hdr);
2886         encode_sequence(xdr, &args->seq_args, &hdr);
2887         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2888         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2889         encode_getfattr(xdr, args->bitmask, &hdr);
2890         encode_nops(&hdr);
2891 }
2892
2893 /*
2894  * Encode LAYOUTRETURN request
2895  */
2896 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2897                                       struct xdr_stream *xdr,
2898                                       struct nfs4_layoutreturn_args *args)
2899 {
2900         struct compound_hdr hdr = {
2901                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2902         };
2903
2904         encode_compound_hdr(xdr, req, &hdr);
2905         encode_sequence(xdr, &args->seq_args, &hdr);
2906         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2907         encode_layoutreturn(xdr, args, &hdr);
2908         encode_nops(&hdr);
2909 }
2910
2911 /*
2912  * Encode SECINFO_NO_NAME request
2913  */
2914 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2915                                         struct xdr_stream *xdr,
2916                                         struct nfs41_secinfo_no_name_args *args)
2917 {
2918         struct compound_hdr hdr = {
2919                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2920         };
2921
2922         encode_compound_hdr(xdr, req, &hdr);
2923         encode_sequence(xdr, &args->seq_args, &hdr);
2924         encode_putrootfh(xdr, &hdr);
2925         encode_secinfo_no_name(xdr, args, &hdr);
2926         encode_nops(&hdr);
2927         return 0;
2928 }
2929
2930 /*
2931  *  Encode TEST_STATEID request
2932  */
2933 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2934                                       struct xdr_stream *xdr,
2935                                       struct nfs41_test_stateid_args *args)
2936 {
2937         struct compound_hdr hdr = {
2938                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2939         };
2940
2941         encode_compound_hdr(xdr, req, &hdr);
2942         encode_sequence(xdr, &args->seq_args, &hdr);
2943         encode_test_stateid(xdr, args, &hdr);
2944         encode_nops(&hdr);
2945 }
2946
2947 /*
2948  *  Encode FREE_STATEID request
2949  */
2950 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2951                                      struct xdr_stream *xdr,
2952                                      struct nfs41_free_stateid_args *args)
2953 {
2954         struct compound_hdr hdr = {
2955                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2956         };
2957
2958         encode_compound_hdr(xdr, req, &hdr);
2959         encode_sequence(xdr, &args->seq_args, &hdr);
2960         encode_free_stateid(xdr, args, &hdr);
2961         encode_nops(&hdr);
2962 }
2963 #endif /* CONFIG_NFS_V4_1 */
2964
2965 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2966 {
2967         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2968                 "Remaining buffer length is %tu words.\n",
2969                 func, xdr->end - xdr->p);
2970 }
2971
2972 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2973 {
2974         __be32 *p;
2975
2976         p = xdr_inline_decode(xdr, 4);
2977         if (unlikely(!p))
2978                 goto out_overflow;
2979         *len = be32_to_cpup(p);
2980         p = xdr_inline_decode(xdr, *len);
2981         if (unlikely(!p))
2982                 goto out_overflow;
2983         *string = (char *)p;
2984         return 0;
2985 out_overflow:
2986         print_overflow_msg(__func__, xdr);
2987         return -EIO;
2988 }
2989
2990 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2991 {
2992         __be32 *p;
2993
2994         p = xdr_inline_decode(xdr, 8);
2995         if (unlikely(!p))
2996                 goto out_overflow;
2997         hdr->status = be32_to_cpup(p++);
2998         hdr->taglen = be32_to_cpup(p);
2999
3000         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3001         if (unlikely(!p))
3002                 goto out_overflow;
3003         hdr->tag = (char *)p;
3004         p += XDR_QUADLEN(hdr->taglen);
3005         hdr->nops = be32_to_cpup(p);
3006         if (unlikely(hdr->nops < 1))
3007                 return nfs4_stat_to_errno(hdr->status);
3008         return 0;
3009 out_overflow:
3010         print_overflow_msg(__func__, xdr);
3011         return -EIO;
3012 }
3013
3014 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3015 {
3016         __be32 *p;
3017         uint32_t opnum;
3018         int32_t nfserr;
3019
3020         p = xdr_inline_decode(xdr, 8);
3021         if (unlikely(!p))
3022                 goto out_overflow;
3023         opnum = be32_to_cpup(p++);
3024         if (opnum != expected) {
3025                 dprintk("nfs: Server returned operation"
3026                         " %d but we issued a request for %d\n",
3027                                 opnum, expected);
3028                 return -EIO;
3029         }
3030         nfserr = be32_to_cpup(p);
3031         if (nfserr != NFS_OK)
3032                 return nfs4_stat_to_errno(nfserr);
3033         return 0;
3034 out_overflow:
3035         print_overflow_msg(__func__, xdr);
3036         return -EIO;
3037 }
3038
3039 /* Dummy routine */
3040 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3041 {
3042         __be32 *p;
3043         unsigned int strlen;
3044         char *str;
3045
3046         p = xdr_inline_decode(xdr, 12);
3047         if (likely(p))
3048                 return decode_opaque_inline(xdr, &strlen, &str);
3049         print_overflow_msg(__func__, xdr);
3050         return -EIO;
3051 }
3052
3053 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3054 {
3055         uint32_t bmlen;
3056         __be32 *p;
3057
3058         p = xdr_inline_decode(xdr, 4);
3059         if (unlikely(!p))
3060                 goto out_overflow;
3061         bmlen = be32_to_cpup(p);
3062
3063         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3064         p = xdr_inline_decode(xdr, (bmlen << 2));
3065         if (unlikely(!p))
3066                 goto out_overflow;
3067         if (bmlen > 0) {
3068                 bitmap[0] = be32_to_cpup(p++);
3069                 if (bmlen > 1) {
3070                         bitmap[1] = be32_to_cpup(p++);
3071                         if (bmlen > 2)
3072                                 bitmap[2] = be32_to_cpup(p);
3073                 }
3074         }
3075         return 0;
3076 out_overflow:
3077         print_overflow_msg(__func__, xdr);
3078         return -EIO;
3079 }
3080
3081 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3082 {
3083         __be32 *p;
3084
3085         p = xdr_inline_decode(xdr, 4);
3086         if (unlikely(!p))
3087                 goto out_overflow;
3088         *attrlen = be32_to_cpup(p);
3089         *savep = xdr_stream_pos(xdr);
3090         return 0;
3091 out_overflow:
3092         print_overflow_msg(__func__, xdr);
3093         return -EIO;
3094 }
3095
3096 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3097 {
3098         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3099                 int ret;
3100                 ret = decode_attr_bitmap(xdr, bitmask);
3101                 if (unlikely(ret < 0))
3102                         return ret;
3103                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3104         } else
3105                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3106         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3107                 bitmask[0], bitmask[1], bitmask[2]);
3108         return 0;
3109 }
3110
3111 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3112 {
3113         __be32 *p;
3114         int ret = 0;
3115
3116         *type = 0;
3117         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3118                 return -EIO;
3119         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3120                 p = xdr_inline_decode(xdr, 4);
3121                 if (unlikely(!p))
3122                         goto out_overflow;
3123                 *type = be32_to_cpup(p);
3124                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3125                         dprintk("%s: bad type %d\n", __func__, *type);
3126                         return -EIO;
3127                 }
3128                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3129                 ret = NFS_ATTR_FATTR_TYPE;
3130         }
3131         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3132         return ret;
3133 out_overflow:
3134         print_overflow_msg(__func__, xdr);
3135         return -EIO;
3136 }
3137
3138 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3139                                       uint32_t *bitmap, uint32_t *type)
3140 {
3141         __be32 *p;
3142
3143         *type = 0;
3144         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3145                 return -EIO;
3146         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3147                 p = xdr_inline_decode(xdr, 4);
3148                 if (unlikely(!p))
3149                         goto out_overflow;
3150                 *type = be32_to_cpup(p);
3151                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3152         }
3153         dprintk("%s: expire type=0x%x\n", __func__, *type);
3154         return 0;
3155 out_overflow:
3156         print_overflow_msg(__func__, xdr);
3157         return -EIO;
3158 }
3159
3160 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3161 {
3162         __be32 *p;
3163         int ret = 0;
3164
3165         *change = 0;
3166         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3167                 return -EIO;
3168         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3169                 p = xdr_inline_decode(xdr, 8);
3170                 if (unlikely(!p))
3171                         goto out_overflow;
3172                 xdr_decode_hyper(p, change);
3173                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3174                 ret = NFS_ATTR_FATTR_CHANGE;
3175         }
3176         dprintk("%s: change attribute=%Lu\n", __func__,
3177                         (unsigned long long)*change);
3178         return ret;
3179 out_overflow:
3180         print_overflow_msg(__func__, xdr);
3181         return -EIO;
3182 }
3183
3184 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3185 {
3186         __be32 *p;
3187         int ret = 0;
3188
3189         *size = 0;
3190         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3191                 return -EIO;
3192         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3193                 p = xdr_inline_decode(xdr, 8);
3194                 if (unlikely(!p))
3195                         goto out_overflow;
3196                 xdr_decode_hyper(p, size);
3197                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3198                 ret = NFS_ATTR_FATTR_SIZE;
3199         }
3200         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3201         return ret;
3202 out_overflow:
3203         print_overflow_msg(__func__, xdr);
3204         return -EIO;
3205 }
3206
3207 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3208 {
3209         __be32 *p;
3210
3211         *res = 0;
3212         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3213                 return -EIO;
3214         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3215                 p = xdr_inline_decode(xdr, 4);
3216                 if (unlikely(!p))
3217                         goto out_overflow;
3218                 *res = be32_to_cpup(p);
3219                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3220         }
3221         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3222         return 0;
3223 out_overflow:
3224         print_overflow_msg(__func__, xdr);
3225         return -EIO;
3226 }
3227
3228 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3229 {
3230         __be32 *p;
3231
3232         *res = 0;
3233         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3234                 return -EIO;
3235         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3236                 p = xdr_inline_decode(xdr, 4);
3237                 if (unlikely(!p))
3238                         goto out_overflow;
3239                 *res = be32_to_cpup(p);
3240                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3241         }
3242         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3243         return 0;
3244 out_overflow:
3245         print_overflow_msg(__func__, xdr);
3246         return -EIO;
3247 }
3248
3249 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3250 {
3251         __be32 *p;
3252         int ret = 0;
3253
3254         fsid->major = 0;
3255         fsid->minor = 0;
3256         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3257                 return -EIO;
3258         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3259                 p = xdr_inline_decode(xdr, 16);
3260                 if (unlikely(!p))
3261                         goto out_overflow;
3262                 p = xdr_decode_hyper(p, &fsid->major);
3263                 xdr_decode_hyper(p, &fsid->minor);
3264                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3265                 ret = NFS_ATTR_FATTR_FSID;
3266         }
3267         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3268                         (unsigned long long)fsid->major,
3269                         (unsigned long long)fsid->minor);
3270         return ret;
3271 out_overflow:
3272         print_overflow_msg(__func__, xdr);
3273         return -EIO;
3274 }
3275
3276 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3277 {
3278         __be32 *p;
3279
3280         *res = 60;
3281         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3282                 return -EIO;
3283         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3284                 p = xdr_inline_decode(xdr, 4);
3285                 if (unlikely(!p))
3286                         goto out_overflow;
3287                 *res = be32_to_cpup(p);
3288                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3289         }
3290         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3291         return 0;
3292 out_overflow:
3293         print_overflow_msg(__func__, xdr);
3294         return -EIO;
3295 }
3296
3297 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3298 {
3299         __be32 *p;
3300
3301         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3302                 return -EIO;
3303         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3304                 p = xdr_inline_decode(xdr, 4);
3305                 if (unlikely(!p))
3306                         goto out_overflow;
3307                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3308                 *res = -be32_to_cpup(p);
3309         }
3310         return 0;
3311 out_overflow:
3312         print_overflow_msg(__func__, xdr);
3313         return -EIO;
3314 }
3315
3316 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3317 {
3318         __be32 *p;
3319         int len;
3320
3321         if (fh != NULL)
3322                 memset(fh, 0, sizeof(*fh));
3323
3324         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3325                 return -EIO;
3326         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3327                 p = xdr_inline_decode(xdr, 4);
3328                 if (unlikely(!p))
3329                         goto out_overflow;
3330                 len = be32_to_cpup(p);
3331                 if (len > NFS4_FHSIZE)
3332                         return -EIO;
3333                 p = xdr_inline_decode(xdr, len);
3334                 if (unlikely(!p))
3335                         goto out_overflow;
3336                 if (fh != NULL) {
3337                         memcpy(fh->data, p, len);
3338                         fh->size = len;
3339                 }
3340                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3341         }
3342         return 0;
3343 out_overflow:
3344         print_overflow_msg(__func__, xdr);
3345         return -EIO;
3346 }
3347
3348 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3349 {
3350         __be32 *p;
3351
3352         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3353         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3354                 return -EIO;
3355         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3356                 p = xdr_inline_decode(xdr, 4);
3357                 if (unlikely(!p))
3358                         goto out_overflow;
3359                 *res = be32_to_cpup(p);
3360                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3361         }
3362         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3363         return 0;
3364 out_overflow:
3365         print_overflow_msg(__func__, xdr);
3366         return -EIO;
3367 }
3368
3369 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3370 {
3371         __be32 *p;
3372         int ret = 0;
3373
3374         *fileid = 0;
3375         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3376                 return -EIO;
3377         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3378                 p = xdr_inline_decode(xdr, 8);
3379                 if (unlikely(!p))
3380                         goto out_overflow;
3381                 xdr_decode_hyper(p, fileid);
3382                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3383                 ret = NFS_ATTR_FATTR_FILEID;
3384         }
3385         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3386         return ret;
3387 out_overflow:
3388         print_overflow_msg(__func__, xdr);
3389         return -EIO;
3390 }
3391
3392 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3393 {
3394         __be32 *p;
3395         int ret = 0;
3396
3397         *fileid = 0;
3398         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3399                 return -EIO;
3400         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3401                 p = xdr_inline_decode(xdr, 8);
3402                 if (unlikely(!p))
3403                         goto out_overflow;
3404                 xdr_decode_hyper(p, fileid);
3405                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3406                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3407         }
3408         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3409         return ret;
3410 out_overflow:
3411         print_overflow_msg(__func__, xdr);
3412         return -EIO;
3413 }
3414
3415 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3416 {
3417         __be32 *p;
3418         int status = 0;
3419
3420         *res = 0;
3421         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3422                 return -EIO;
3423         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3424                 p = xdr_inline_decode(xdr, 8);
3425                 if (unlikely(!p))
3426                         goto out_overflow;
3427                 xdr_decode_hyper(p, res);
3428                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3429         }
3430         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3431         return status;
3432 out_overflow:
3433         print_overflow_msg(__func__, xdr);
3434         return -EIO;
3435 }
3436
3437 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3438 {
3439         __be32 *p;
3440         int status = 0;
3441
3442         *res = 0;
3443         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3444                 return -EIO;
3445         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3446                 p = xdr_inline_decode(xdr, 8);
3447                 if (unlikely(!p))
3448                         goto out_overflow;
3449                 xdr_decode_hyper(p, res);
3450                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3451         }
3452         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3453         return status;
3454 out_overflow:
3455         print_overflow_msg(__func__, xdr);
3456         return -EIO;
3457 }
3458
3459 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3460 {
3461         __be32 *p;
3462         int status = 0;
3463
3464         *res = 0;
3465         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3466                 return -EIO;
3467         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3468                 p = xdr_inline_decode(xdr, 8);
3469                 if (unlikely(!p))
3470                         goto out_overflow;
3471                 xdr_decode_hyper(p, res);
3472                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3473         }
3474         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3475         return status;
3476 out_overflow:
3477         print_overflow_msg(__func__, xdr);
3478         return -EIO;
3479 }
3480
3481 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3482 {
3483         u32 n;
3484         __be32 *p;
3485         int status = 0;
3486
3487         p = xdr_inline_decode(xdr, 4);
3488         if (unlikely(!p))
3489                 goto out_overflow;
3490         n = be32_to_cpup(p);
3491         if (n == 0)
3492                 goto root_path;
3493         dprintk("pathname4: ");
3494         path->ncomponents = 0;
3495         while (path->ncomponents < n) {
3496                 struct nfs4_string *component = &path->components[path->ncomponents];
3497                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3498                 if (unlikely(status != 0))
3499                         goto out_eio;
3500                 ifdebug (XDR)
3501                         pr_cont("%s%.*s ",
3502                                 (path->ncomponents != n ? "/ " : ""),
3503                                 component->len, component->data);
3504                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3505                         path->ncomponents++;
3506                 else {
3507                         dprintk("cannot parse %d components in path\n", n);
3508                         goto out_eio;
3509                 }
3510         }
3511 out:
3512         return status;
3513 root_path:
3514 /* a root pathname is sent as a zero component4 */
3515         path->ncomponents = 1;
3516         path->components[0].len=0;
3517         path->components[0].data=NULL;
3518         dprintk("pathname4: /\n");
3519         goto out;
3520 out_eio:
3521         dprintk(" status %d", status);
3522         status = -EIO;
3523         goto out;
3524 out_overflow:
3525         print_overflow_msg(__func__, xdr);
3526         return -EIO;
3527 }
3528
3529 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3530 {
3531         int n;
3532         __be32 *p;
3533         int status = -EIO;
3534
3535         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3536                 goto out;
3537         status = 0;
3538         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3539                 goto out;
3540         status = -EIO;
3541         /* Ignore borken servers that return unrequested attrs */
3542         if (unlikely(res == NULL))
3543                 goto out;
3544         dprintk("%s: fsroot:\n", __func__);
3545         status = decode_pathname(xdr, &res->fs_path);
3546         if (unlikely(status != 0))
3547                 goto out;
3548         p = xdr_inline_decode(xdr, 4);
3549         if (unlikely(!p))
3550                 goto out_overflow;
3551         n = be32_to_cpup(p);
3552         if (n <= 0)
3553                 goto out_eio;
3554         res->nlocations = 0;
3555         while (res->nlocations < n) {
3556                 u32 m;
3557                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3558
3559                 p = xdr_inline_decode(xdr, 4);
3560                 if (unlikely(!p))
3561                         goto out_overflow;
3562                 m = be32_to_cpup(p);
3563
3564                 loc->nservers = 0;
3565                 dprintk("%s: servers:\n", __func__);
3566                 while (loc->nservers < m) {
3567                         struct nfs4_string *server = &loc->servers[loc->nservers];
3568                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3569                         if (unlikely(status != 0))
3570                                 goto out_eio;
3571                         dprintk("%s ", server->data);
3572                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3573                                 loc->nservers++;
3574                         else {
3575                                 unsigned int i;
3576                                 dprintk("%s: using first %u of %u servers "
3577                                         "returned for location %u\n",
3578                                                 __func__,
3579                                                 NFS4_FS_LOCATION_MAXSERVERS,
3580                                                 m, res->nlocations);
3581                                 for (i = loc->nservers; i < m; i++) {
3582                                         unsigned int len;
3583                                         char *data;
3584                                         status = decode_opaque_inline(xdr, &len, &data);
3585                                         if (unlikely(status != 0))
3586                                                 goto out_eio;
3587                                 }
3588                         }
3589                 }
3590                 status = decode_pathname(xdr, &loc->rootpath);
3591                 if (unlikely(status != 0))
3592                         goto out_eio;
3593                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3594                         res->nlocations++;
3595         }
3596         if (res->nlocations != 0)
3597                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3598 out:
3599         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3600         return status;
3601 out_overflow:
3602         print_overflow_msg(__func__, xdr);
3603 out_eio:
3604         status = -EIO;
3605         goto out;
3606 }
3607
3608 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3609 {
3610         __be32 *p;
3611         int status = 0;
3612
3613         *res = 0;
3614         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3615                 return -EIO;
3616         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3617                 p = xdr_inline_decode(xdr, 8);
3618                 if (unlikely(!p))
3619                         goto out_overflow;
3620                 xdr_decode_hyper(p, res);
3621                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3622         }
3623         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3624         return status;
3625 out_overflow:
3626         print_overflow_msg(__func__, xdr);
3627         return -EIO;
3628 }
3629
3630 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3631 {
3632         __be32 *p;
3633         int status = 0;
3634
3635         *maxlink = 1;
3636         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3637                 return -EIO;
3638         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3639                 p = xdr_inline_decode(xdr, 4);
3640                 if (unlikely(!p))
3641                         goto out_overflow;
3642                 *maxlink = be32_to_cpup(p);
3643                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3644         }
3645         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3646         return status;
3647 out_overflow:
3648         print_overflow_msg(__func__, xdr);
3649         return -EIO;
3650 }
3651
3652 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3653 {
3654         __be32 *p;
3655         int status = 0;
3656
3657         *maxname = 1024;
3658         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3659                 return -EIO;
3660         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3661                 p = xdr_inline_decode(xdr, 4);
3662                 if (unlikely(!p))
3663                         goto out_overflow;
3664                 *maxname = be32_to_cpup(p);
3665                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3666         }
3667         dprintk("%s: maxname=%u\n", __func__, *maxname);
3668         return status;
3669 out_overflow:
3670         print_overflow_msg(__func__, xdr);
3671         return -EIO;
3672 }
3673
3674 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3675 {
3676         __be32 *p;
3677         int status = 0;
3678
3679         *res = 1024;
3680         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3681                 return -EIO;
3682         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3683                 uint64_t maxread;
3684                 p = xdr_inline_decode(xdr, 8);
3685                 if (unlikely(!p))
3686                         goto out_overflow;
3687                 xdr_decode_hyper(p, &maxread);
3688                 if (maxread > 0x7FFFFFFF)
3689                         maxread = 0x7FFFFFFF;
3690                 *res = (uint32_t)maxread;
3691                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3692         }
3693         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3694         return status;
3695 out_overflow:
3696         print_overflow_msg(__func__, xdr);
3697         return -EIO;
3698 }
3699
3700 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3701 {
3702         __be32 *p;
3703         int status = 0;
3704
3705         *res = 1024;
3706         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3707                 return -EIO;
3708         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3709                 uint64_t maxwrite;
3710                 p = xdr_inline_decode(xdr, 8);
3711                 if (unlikely(!p))
3712                         goto out_overflow;
3713                 xdr_decode_hyper(p, &maxwrite);
3714                 if (maxwrite > 0x7FFFFFFF)
3715                         maxwrite = 0x7FFFFFFF;
3716                 *res = (uint32_t)maxwrite;
3717                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3718         }
3719         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3720         return status;
3721 out_overflow:
3722         print_overflow_msg(__func__, xdr);
3723         return -EIO;
3724 }
3725
3726 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3727 {
3728         uint32_t tmp;
3729         __be32 *p;
3730         int ret = 0;
3731
3732         *mode = 0;
3733         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3734                 return -EIO;
3735         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3736                 p = xdr_inline_decode(xdr, 4);
3737                 if (unlikely(!p))
3738                         goto out_overflow;
3739                 tmp = be32_to_cpup(p);
3740                 *mode = tmp & ~S_IFMT;
3741                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3742                 ret = NFS_ATTR_FATTR_MODE;
3743         }
3744         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3745         return ret;
3746 out_overflow:
3747         print_overflow_msg(__func__, xdr);
3748         return -EIO;
3749 }
3750
3751 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3752 {
3753         __be32 *p;
3754         int ret = 0;
3755
3756         *nlink = 1;
3757         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3758                 return -EIO;
3759         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3760                 p = xdr_inline_decode(xdr, 4);
3761                 if (unlikely(!p))
3762                         goto out_overflow;
3763                 *nlink = be32_to_cpup(p);
3764                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3765                 ret = NFS_ATTR_FATTR_NLINK;
3766         }
3767         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3768         return ret;
3769 out_overflow:
3770         print_overflow_msg(__func__, xdr);
3771         return -EIO;
3772 }
3773
3774 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3775                 const struct nfs_server *server, uint32_t *uid,
3776                 struct nfs4_string *owner_name)
3777 {
3778         uint32_t len;
3779         __be32 *p;
3780         int ret = 0;
3781
3782         *uid = -2;
3783         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3784                 return -EIO;
3785         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3786                 p = xdr_inline_decode(xdr, 4);
3787                 if (unlikely(!p))
3788                         goto out_overflow;
3789                 len = be32_to_cpup(p);
3790                 p = xdr_inline_decode(xdr, len);
3791                 if (unlikely(!p))
3792                         goto out_overflow;
3793                 if (owner_name != NULL) {
3794                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3795                         if (owner_name->data != NULL) {
3796                                 owner_name->len = len;
3797                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3798                         }
3799                 } else if (len < XDR_MAX_NETOBJ) {
3800                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3801                                 ret = NFS_ATTR_FATTR_OWNER;
3802                         else
3803                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3804                                                 __func__);
3805                 } else
3806                         dprintk("%s: name too long (%u)!\n",
3807                                         __func__, len);
3808                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3809         }
3810         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3811         return ret;
3812 out_overflow:
3813         print_overflow_msg(__func__, xdr);
3814         return -EIO;
3815 }
3816
3817 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3818                 const struct nfs_server *server, uint32_t *gid,
3819                 struct nfs4_string *group_name)
3820 {
3821         uint32_t len;
3822         __be32 *p;
3823         int ret = 0;
3824
3825         *gid = -2;
3826         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3827                 return -EIO;
3828         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3829                 p = xdr_inline_decode(xdr, 4);
3830                 if (unlikely(!p))
3831                         goto out_overflow;
3832                 len = be32_to_cpup(p);
3833                 p = xdr_inline_decode(xdr, len);
3834                 if (unlikely(!p))
3835                         goto out_overflow;
3836                 if (group_name != NULL) {
3837                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3838                         if (group_name->data != NULL) {
3839                                 group_name->len = len;
3840                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3841                         }
3842                 } else if (len < XDR_MAX_NETOBJ) {
3843                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3844                                 ret = NFS_ATTR_FATTR_GROUP;
3845                         else
3846                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3847                                                 __func__);
3848                 } else
3849                         dprintk("%s: name too long (%u)!\n",
3850                                         __func__, len);
3851                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3852         }
3853         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3854         return ret;
3855 out_overflow:
3856         print_overflow_msg(__func__, xdr);
3857         return -EIO;
3858 }
3859
3860 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3861 {
3862         uint32_t major = 0, minor = 0;
3863         __be32 *p;
3864         int ret = 0;
3865
3866         *rdev = MKDEV(0,0);
3867         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3868                 return -EIO;
3869         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3870                 dev_t tmp;
3871
3872                 p = xdr_inline_decode(xdr, 8);
3873                 if (unlikely(!p))
3874                         goto out_overflow;
3875                 major = be32_to_cpup(p++);
3876                 minor = be32_to_cpup(p);
3877                 tmp = MKDEV(major, minor);
3878                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3879                         *rdev = tmp;
3880                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3881                 ret = NFS_ATTR_FATTR_RDEV;
3882         }
3883         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3884         return ret;
3885 out_overflow:
3886         print_overflow_msg(__func__, xdr);
3887         return -EIO;
3888 }
3889
3890 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3891 {
3892         __be32 *p;
3893         int status = 0;
3894
3895         *res = 0;
3896         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3897                 return -EIO;
3898         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3899                 p = xdr_inline_decode(xdr, 8);
3900                 if (unlikely(!p))
3901                         goto out_overflow;
3902                 xdr_decode_hyper(p, res);
3903                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3904         }
3905         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3906         return status;
3907 out_overflow:
3908         print_overflow_msg(__func__, xdr);
3909         return -EIO;
3910 }
3911
3912 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3913 {
3914         __be32 *p;
3915         int status = 0;
3916
3917         *res = 0;
3918         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3919                 return -EIO;
3920         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3921                 p = xdr_inline_decode(xdr, 8);
3922                 if (unlikely(!p))
3923                         goto out_overflow;
3924                 xdr_decode_hyper(p, res);
3925                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3926         }
3927         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3928         return status;
3929 out_overflow:
3930         print_overflow_msg(__func__, xdr);
3931         return -EIO;
3932 }
3933
3934 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3935 {
3936         __be32 *p;
3937         int status = 0;
3938
3939         *res = 0;
3940         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3941                 return -EIO;
3942         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3943                 p = xdr_inline_decode(xdr, 8);
3944                 if (unlikely(!p))
3945                         goto out_overflow;
3946                 xdr_decode_hyper(p, res);
3947                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3948         }
3949         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3950         return status;
3951 out_overflow:
3952         print_overflow_msg(__func__, xdr);
3953         return -EIO;
3954 }
3955
3956 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3957 {
3958         __be32 *p;
3959         int ret = 0;
3960
3961         *used = 0;
3962         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3963                 return -EIO;
3964         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3965                 p = xdr_inline_decode(xdr, 8);
3966                 if (unlikely(!p))
3967                         goto out_overflow;
3968                 xdr_decode_hyper(p, used);
3969                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3970                 ret = NFS_ATTR_FATTR_SPACE_USED;
3971         }
3972         dprintk("%s: space used=%Lu\n", __func__,
3973                         (unsigned long long)*used);
3974         return ret;
3975 out_overflow:
3976         print_overflow_msg(__func__, xdr);
3977         return -EIO;
3978 }
3979
3980 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3981 {
3982         __be32 *p;
3983         uint64_t sec;
3984         uint32_t nsec;
3985
3986         p = xdr_inline_decode(xdr, 12);
3987         if (unlikely(!p))
3988                 goto out_overflow;
3989         p = xdr_decode_hyper(p, &sec);
3990         nsec = be32_to_cpup(p);
3991         time->tv_sec = (time_t)sec;
3992         time->tv_nsec = (long)nsec;
3993         return 0;
3994 out_overflow:
3995         print_overflow_msg(__func__, xdr);
3996         return -EIO;
3997 }
3998
3999 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4000 {
4001         int status = 0;
4002
4003         time->tv_sec = 0;
4004         time->tv_nsec = 0;
4005         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4006                 return -EIO;
4007         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4008                 status = decode_attr_time(xdr, time);
4009                 if (status == 0)
4010                         status = NFS_ATTR_FATTR_ATIME;
4011                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4012         }
4013         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4014         return status;
4015 }
4016
4017 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4018 {
4019         int status = 0;
4020
4021         time->tv_sec = 0;
4022         time->tv_nsec = 0;
4023         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4024                 return -EIO;
4025         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4026                 status = decode_attr_time(xdr, time);
4027                 if (status == 0)
4028                         status = NFS_ATTR_FATTR_CTIME;
4029                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4030         }
4031         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4032         return status;
4033 }
4034
4035 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4036                                   struct timespec *time)
4037 {
4038         int status = 0;
4039
4040         time->tv_sec = 0;
4041         time->tv_nsec = 0;
4042         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4043                 return -EIO;
4044         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4045                 status = decode_attr_time(xdr, time);
4046                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4047         }
4048         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4049                 (long)time->tv_nsec);
4050         return status;
4051 }
4052
4053 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4054 {
4055         int status = 0;
4056
4057         time->tv_sec = 0;
4058         time->tv_nsec = 0;
4059         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4060                 return -EIO;
4061         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4062                 status = decode_attr_time(xdr, time);
4063                 if (status == 0)
4064                         status = NFS_ATTR_FATTR_MTIME;
4065                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4066         }
4067         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4068         return status;
4069 }
4070
4071 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4072 {
4073         unsigned int attrwords = XDR_QUADLEN(attrlen);
4074         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4075
4076         if (unlikely(attrwords != nwords)) {
4077                 dprintk("%s: server returned incorrect attribute length: "
4078                         "%u %c %u\n",
4079                                 __func__,
4080                                 attrwords << 2,
4081                                 (attrwords < nwords) ? '<' : '>',
4082                                 nwords << 2);
4083                 return -EIO;
4084         }
4085         return 0;
4086 }
4087
4088 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4089 {
4090         __be32 *p;
4091
4092         p = xdr_inline_decode(xdr, 20);
4093         if (unlikely(!p))
4094                 goto out_overflow;
4095         cinfo->atomic = be32_to_cpup(p++);
4096         p = xdr_decode_hyper(p, &cinfo->before);
4097         xdr_decode_hyper(p, &cinfo->after);
4098         return 0;
4099 out_overflow:
4100         print_overflow_msg(__func__, xdr);
4101         return -EIO;
4102 }
4103
4104 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4105 {
4106         __be32 *p;
4107         uint32_t supp, acc;
4108         int status;
4109
4110         status = decode_op_hdr(xdr, OP_ACCESS);
4111         if (status)
4112                 return status;
4113         p = xdr_inline_decode(xdr, 8);
4114         if (unlikely(!p))
4115                 goto out_overflow;
4116         supp = be32_to_cpup(p++);
4117         acc = be32_to_cpup(p);
4118         access->supported = supp;
4119         access->access = acc;
4120         return 0;
4121 out_overflow:
4122         print_overflow_msg(__func__, xdr);
4123         return -EIO;
4124 }
4125
4126 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4127 {
4128         __be32 *p;
4129
4130         p = xdr_inline_decode(xdr, len);
4131         if (likely(p)) {
4132                 memcpy(buf, p, len);
4133                 return 0;
4134         }
4135         print_overflow_msg(__func__, xdr);
4136         return -EIO;
4137 }
4138
4139 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4140 {
4141         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4142 }
4143
4144 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4145 {
4146         int status;
4147
4148         status = decode_op_hdr(xdr, OP_CLOSE);
4149         if (status != -EIO)
4150                 nfs_increment_open_seqid(status, res->seqid);
4151         if (!status)
4152                 status = decode_stateid(xdr, &res->stateid);
4153         return status;
4154 }
4155
4156 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4157 {
4158         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4159 }
4160
4161 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4162 {
4163         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4164 }
4165
4166 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4167 {
4168         int status;
4169
4170         status = decode_op_hdr(xdr, OP_COMMIT);
4171         if (!status)
4172                 status = decode_write_verifier(xdr, &res->verf->verifier);
4173         return status;
4174 }
4175
4176 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4177 {
4178         __be32 *p;
4179         uint32_t bmlen;
4180         int status;
4181
4182         status = decode_op_hdr(xdr, OP_CREATE);
4183         if (status)
4184                 return status;
4185         if ((status = decode_change_info(xdr, cinfo)))
4186                 return status;
4187         p = xdr_inline_decode(xdr, 4);
4188         if (unlikely(!p))
4189                 goto out_overflow;
4190         bmlen = be32_to_cpup(p);
4191         p = xdr_inline_decode(xdr, bmlen << 2);
4192         if (likely(p))
4193                 return 0;
4194 out_overflow:
4195         print_overflow_msg(__func__, xdr);
4196         return -EIO;
4197 }
4198
4199 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4200 {
4201         unsigned int savep;
4202         uint32_t attrlen, bitmap[3] = {0};
4203         int status;
4204
4205         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4206                 goto xdr_error;
4207         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4208                 goto xdr_error;
4209         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4210                 goto xdr_error;
4211         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4212                 goto xdr_error;
4213         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4214                                                  &res->fh_expire_type)) != 0)
4215                 goto xdr_error;
4216         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4217                 goto xdr_error;
4218         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4219                 goto xdr_error;
4220         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4221                 goto xdr_error;
4222         status = verify_attr_len(xdr, savep, attrlen);
4223 xdr_error:
4224         dprintk("%s: xdr returned %d!\n", __func__, -status);
4225         return status;
4226 }
4227
4228 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4229 {
4230         unsigned int savep;
4231         uint32_t attrlen, bitmap[3] = {0};
4232         int status;
4233
4234         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4235                 goto xdr_error;
4236         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4237                 goto xdr_error;
4238         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4239                 goto xdr_error;
4240
4241         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4242                 goto xdr_error;
4243         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4244                 goto xdr_error;
4245         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4246                 goto xdr_error;
4247         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4248                 goto xdr_error;
4249         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4250                 goto xdr_error;
4251         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4252                 goto xdr_error;
4253
4254         status = verify_attr_len(xdr, savep, attrlen);
4255 xdr_error:
4256         dprintk("%s: xdr returned %d!\n", __func__, -status);
4257         return status;
4258 }
4259
4260 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4261 {
4262         unsigned int savep;
4263         uint32_t attrlen, bitmap[3] = {0};
4264         int status;
4265
4266         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4267                 goto xdr_error;
4268         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4269                 goto xdr_error;
4270         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4271                 goto xdr_error;
4272
4273         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4274                 goto xdr_error;
4275         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4276                 goto xdr_error;
4277
4278         status = verify_attr_len(xdr, savep, attrlen);
4279 xdr_error:
4280         dprintk("%s: xdr returned %d!\n", __func__, -status);
4281         return status;
4282 }
4283
4284 static int decode_threshold_hint(struct xdr_stream *xdr,
4285                                   uint32_t *bitmap,
4286                                   uint64_t *res,
4287                                   uint32_t hint_bit)
4288 {
4289         __be32 *p;
4290
4291         *res = 0;
4292         if (likely(bitmap[0] & hint_bit)) {
4293                 p = xdr_inline_decode(xdr, 8);
4294                 if (unlikely(!p))
4295                         goto out_overflow;
4296                 xdr_decode_hyper(p, res);
4297         }
4298         return 0;
4299 out_overflow:
4300         print_overflow_msg(__func__, xdr);
4301         return -EIO;
4302 }
4303
4304 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4305                                         struct nfs4_threshold *res)
4306 {
4307         __be32 *p;
4308         unsigned int savep;
4309         uint32_t bitmap[3] = {0,}, attrlen;
4310         int status;
4311
4312         /* layout type */
4313         p = xdr_inline_decode(xdr, 4);
4314         if (unlikely(!p)) {
4315                 print_overflow_msg(__func__, xdr);
4316                 return -EIO;
4317         }
4318         res->l_type = be32_to_cpup(p);
4319
4320         /* thi_hintset bitmap */
4321         status = decode_attr_bitmap(xdr, bitmap);
4322         if (status < 0)
4323                 goto xdr_error;
4324
4325         /* thi_hintlist length */
4326         status = decode_attr_length(xdr, &attrlen, &savep);
4327         if (status < 0)
4328                 goto xdr_error;
4329         /* thi_hintlist */
4330         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4331         if (status < 0)
4332                 goto xdr_error;
4333         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4334         if (status < 0)
4335                 goto xdr_error;
4336         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4337                                        THRESHOLD_RD_IO);
4338         if (status < 0)
4339                 goto xdr_error;
4340         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4341                                        THRESHOLD_WR_IO);
4342         if (status < 0)
4343                 goto xdr_error;
4344
4345         status = verify_attr_len(xdr, savep, attrlen);
4346         res->bm = bitmap[0];
4347
4348         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4349                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4350                 res->wr_io_sz);
4351 xdr_error:
4352         dprintk("%s ret=%d!\n", __func__, status);
4353         return status;
4354 }
4355
4356 /*
4357  * Thresholds on pNFS direct I/O vrs MDS I/O
4358  */
4359 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4360                                     uint32_t *bitmap,
4361                                     struct nfs4_threshold *res)
4362 {
4363         __be32 *p;
4364         int status = 0;
4365         uint32_t num;
4366
4367         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4368                 return -EIO;
4369         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4370                 /* Did the server return an unrequested attribute? */
4371                 if (unlikely(res == NULL))
4372                         return -EREMOTEIO;
4373                 p = xdr_inline_decode(xdr, 4);
4374                 if (unlikely(!p))
4375                         goto out_overflow;
4376                 num = be32_to_cpup(p);
4377                 if (num == 0)
4378                         return 0;
4379                 if (num > 1)
4380                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4381                                 "drivers per filesystem not supported\n",
4382                                 __func__);
4383
4384                 status = decode_first_threshold_item4(xdr, res);
4385                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4386         }
4387         return status;
4388 out_overflow:
4389         print_overflow_msg(__func__, xdr);
4390         return -EIO;
4391 }
4392
4393 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4394                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4395                 struct nfs4_fs_locations *fs_loc,
4396                 const struct nfs_server *server)
4397 {
4398         int status;
4399         umode_t fmode = 0;
4400         uint32_t type;
4401         int32_t err;
4402
4403         status = decode_attr_type(xdr, bitmap, &type);
4404         if (status < 0)
4405                 goto xdr_error;
4406         fattr->mode = 0;
4407         if (status != 0) {
4408                 fattr->mode |= nfs_type2fmt[type];
4409                 fattr->valid |= status;
4410         }
4411
4412         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4413         if (status < 0)
4414                 goto xdr_error;
4415         fattr->valid |= status;
4416
4417         status = decode_attr_size(xdr, bitmap, &fattr->size);
4418         if (status < 0)
4419                 goto xdr_error;
4420         fattr->valid |= status;
4421
4422         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4423         if (status < 0)
4424                 goto xdr_error;
4425         fattr->valid |= status;
4426
4427         err = 0;
4428         status = decode_attr_error(xdr, bitmap, &err);
4429         if (status < 0)
4430                 goto xdr_error;
4431
4432         status = decode_attr_filehandle(xdr, bitmap, fh);
4433         if (status < 0)
4434                 goto xdr_error;
4435
4436         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4437         if (status < 0)
4438                 goto xdr_error;
4439         fattr->valid |= status;
4440
4441         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4442         if (status < 0)
4443                 goto xdr_error;
4444         fattr->valid |= status;
4445
4446         status = decode_attr_mode(xdr, bitmap, &fmode);
4447         if (status < 0)
4448                 goto xdr_error;
4449         if (status != 0) {
4450                 fattr->mode |= fmode;
4451                 fattr->valid |= status;
4452         }
4453
4454         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4455         if (status < 0)
4456                 goto xdr_error;
4457         fattr->valid |= status;
4458
4459         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4460         if (status < 0)
4461                 goto xdr_error;
4462         fattr->valid |= status;
4463
4464         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4465         if (status < 0)
4466                 goto xdr_error;
4467         fattr->valid |= status;
4468
4469         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4470         if (status < 0)
4471                 goto xdr_error;
4472         fattr->valid |= status;
4473
4474         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4475         if (status < 0)
4476                 goto xdr_error;
4477         fattr->valid |= status;
4478
4479         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4480         if (status < 0)
4481                 goto xdr_error;
4482         fattr->valid |= status;
4483
4484         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4485         if (status < 0)
4486                 goto xdr_error;
4487         fattr->valid |= status;
4488
4489         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4490         if (status < 0)
4491                 goto xdr_error;
4492         fattr->valid |= status;
4493
4494         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4495         if (status < 0)
4496                 goto xdr_error;
4497         fattr->valid |= status;
4498
4499         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4500         if (status < 0)
4501                 goto xdr_error;
4502
4503 xdr_error:
4504         dprintk("%s: xdr returned %d\n", __func__, -status);
4505         return status;
4506 }
4507
4508 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4509                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4510                 const struct nfs_server *server)
4511 {
4512         unsigned int savep;
4513         uint32_t attrlen,
4514                  bitmap[3] = {0};
4515         int status;
4516
4517         status = decode_op_hdr(xdr, OP_GETATTR);
4518         if (status < 0)
4519                 goto xdr_error;
4520
4521         status = decode_attr_bitmap(xdr, bitmap);
4522         if (status < 0)
4523                 goto xdr_error;
4524
4525         status = decode_attr_length(xdr, &attrlen, &savep);
4526         if (status < 0)
4527                 goto xdr_error;
4528
4529         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4530         if (status < 0)
4531                 goto xdr_error;
4532
4533         status = verify_attr_len(xdr, savep, attrlen);
4534 xdr_error:
4535         dprintk("%s: xdr returned %d\n", __func__, -status);
4536         return status;
4537 }
4538
4539 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4540                 const struct nfs_server *server)
4541 {
4542         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4543 }
4544
4545 /*
4546  * Decode potentially multiple layout types. Currently we only support
4547  * one layout driver per file system.
4548  */
4549 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4550                                          uint32_t *layouttype)
4551 {
4552         uint32_t *p;
4553         int num;
4554
4555         p = xdr_inline_decode(xdr, 4);
4556         if (unlikely(!p))
4557                 goto out_overflow;
4558         num = be32_to_cpup(p);
4559
4560         /* pNFS is not supported by the underlying file system */
4561         if (num == 0) {
4562                 *layouttype = 0;
4563                 return 0;
4564         }
4565         if (num > 1)
4566                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4567                         "drivers per filesystem not supported\n", __func__);
4568
4569         /* Decode and set first layout type, move xdr->p past unused types */
4570         p = xdr_inline_decode(xdr, num * 4);
4571         if (unlikely(!p))
4572                 goto out_overflow;
4573         *layouttype = be32_to_cpup(p);
4574         return 0;
4575 out_overflow:
4576         print_overflow_msg(__func__, xdr);
4577         return -EIO;
4578 }
4579
4580 /*
4581  * The type of file system exported.
4582  * Note we must ensure that layouttype is set in any non-error case.
4583  */
4584 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4585                                 uint32_t *layouttype)
4586 {
4587         int status = 0;
4588
4589         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4590         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4591                 return -EIO;
4592         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4593                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4594                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4595         } else
4596                 *layouttype = 0;
4597         return status;
4598 }
4599
4600 /*
4601  * The prefered block size for layout directed io
4602  */
4603 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4604                                       uint32_t *res)
4605 {
4606         __be32 *p;
4607
4608         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4609         *res = 0;
4610         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4611                 p = xdr_inline_decode(xdr, 4);
4612                 if (unlikely(!p)) {
4613                         print_overflow_msg(__func__, xdr);
4614                         return -EIO;
4615                 }
4616                 *res = be32_to_cpup(p);
4617                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4618         }
4619         return 0;
4620 }
4621
4622 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4623 {
4624         unsigned int savep;
4625         uint32_t attrlen, bitmap[3];
4626         int status;
4627
4628         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4629                 goto xdr_error;
4630         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4631                 goto xdr_error;
4632         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4633                 goto xdr_error;
4634
4635         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4636
4637         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4638                 goto xdr_error;
4639         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4640                 goto xdr_error;
4641         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4642                 goto xdr_error;
4643         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4644         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4645                 goto xdr_error;
4646         fsinfo->wtpref = fsinfo->wtmax;
4647         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4648         if (status != 0)
4649                 goto xdr_error;
4650         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4651         if (status != 0)
4652                 goto xdr_error;
4653         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4654         if (status)
4655                 goto xdr_error;
4656
4657         status = verify_attr_len(xdr, savep, attrlen);
4658 xdr_error:
4659         dprintk("%s: xdr returned %d!\n", __func__, -status);
4660         return status;
4661 }
4662
4663 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4664 {
4665         __be32 *p;
4666         uint32_t len;
4667         int status;
4668
4669         /* Zero handle first to allow comparisons */
4670         memset(fh, 0, sizeof(*fh));
4671
4672         status = decode_op_hdr(xdr, OP_GETFH);
4673         if (status)
4674                 return status;
4675
4676         p = xdr_inline_decode(xdr, 4);
4677         if (unlikely(!p))
4678                 goto out_overflow;
4679         len = be32_to_cpup(p);
4680         if (len > NFS4_FHSIZE)
4681                 return -EIO;
4682         fh->size = len;
4683         p = xdr_inline_decode(xdr, len);
4684         if (unlikely(!p))
4685                 goto out_overflow;
4686         memcpy(fh->data, p, len);
4687         return 0;
4688 out_overflow:
4689         print_overflow_msg(__func__, xdr);
4690         return -EIO;
4691 }
4692
4693 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4694 {
4695         int status;
4696
4697         status = decode_op_hdr(xdr, OP_LINK);
4698         if (status)
4699                 return status;
4700         return decode_change_info(xdr, cinfo);
4701 }
4702
4703 /*
4704  * We create the owner, so we know a proper owner.id length is 4.
4705  */
4706 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4707 {
4708         uint64_t offset, length, clientid;
4709         __be32 *p;
4710         uint32_t namelen, type;
4711
4712         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4713         if (unlikely(!p))
4714                 goto out_overflow;
4715         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4716         p = xdr_decode_hyper(p, &length);
4717         type = be32_to_cpup(p++); /* 4 byte read */
4718         if (fl != NULL) { /* manipulate file lock */
4719                 fl->fl_start = (loff_t)offset;
4720                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4721                 if (length == ~(uint64_t)0)
4722                         fl->fl_end = OFFSET_MAX;
4723                 fl->fl_type = F_WRLCK;
4724                 if (type & 1)
4725                         fl->fl_type = F_RDLCK;
4726                 fl->fl_pid = 0;
4727         }
4728         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4729         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4730         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4731         if (likely(p))
4732                 return -NFS4ERR_DENIED;
4733 out_overflow:
4734         print_overflow_msg(__func__, xdr);
4735         return -EIO;
4736 }
4737
4738 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4739 {
4740         int status;
4741
4742         status = decode_op_hdr(xdr, OP_LOCK);
4743         if (status == -EIO)
4744                 goto out;
4745         if (status == 0) {
4746                 status = decode_stateid(xdr, &res->stateid);
4747                 if (unlikely(status))
4748                         goto out;
4749         } else if (status == -NFS4ERR_DENIED)
4750                 status = decode_lock_denied(xdr, NULL);
4751         if (res->open_seqid != NULL)
4752                 nfs_increment_open_seqid(status, res->open_seqid);
4753         nfs_increment_lock_seqid(status, res->lock_seqid);
4754 out:
4755         return status;
4756 }
4757
4758 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4759 {
4760         int status;
4761         status = decode_op_hdr(xdr, OP_LOCKT);
4762         if (status == -NFS4ERR_DENIED)
4763                 return decode_lock_denied(xdr, res->denied);
4764         return status;
4765 }
4766
4767 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4768 {
4769         int status;
4770
4771         status = decode_op_hdr(xdr, OP_LOCKU);
4772         if (status != -EIO)
4773                 nfs_increment_lock_seqid(status, res->seqid);
4774         if (status == 0)
4775                 status = decode_stateid(xdr, &res->stateid);
4776         return status;
4777 }
4778
4779 static int decode_release_lockowner(struct xdr_stream *xdr)
4780 {
4781         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4782 }
4783
4784 static int decode_lookup(struct xdr_stream *xdr)
4785 {
4786         return decode_op_hdr(xdr, OP_LOOKUP);
4787 }
4788
4789 /* This is too sick! */
4790 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4791 {
4792         __be32 *p;
4793         uint32_t limit_type, nblocks, blocksize;
4794
4795         p = xdr_inline_decode(xdr, 12);
4796         if (unlikely(!p))
4797                 goto out_overflow;
4798         limit_type = be32_to_cpup(p++);
4799         switch (limit_type) {
4800         case 1:
4801                 xdr_decode_hyper(p, maxsize);
4802                 break;
4803         case 2:
4804                 nblocks = be32_to_cpup(p++);
4805                 blocksize = be32_to_cpup(p);
4806                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4807         }
4808         return 0;
4809 out_overflow:
4810         print_overflow_msg(__func__, xdr);
4811         return -EIO;
4812 }
4813
4814 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4815 {
4816         __be32 *p;
4817         uint32_t delegation_type;
4818         int status;
4819
4820         p = xdr_inline_decode(xdr, 4);
4821         if (unlikely(!p))
4822                 goto out_overflow;
4823         delegation_type = be32_to_cpup(p);
4824         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4825                 res->delegation_type = 0;
4826                 return 0;
4827         }
4828         status = decode_stateid(xdr, &res->delegation);
4829         if (unlikely(status))
4830                 return status;
4831         p = xdr_inline_decode(xdr, 4);
4832         if (unlikely(!p))
4833                 goto out_overflow;
4834         res->do_recall = be32_to_cpup(p);
4835
4836         switch (delegation_type) {
4837         case NFS4_OPEN_DELEGATE_READ:
4838                 res->delegation_type = FMODE_READ;
4839                 break;
4840         case NFS4_OPEN_DELEGATE_WRITE:
4841                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4842                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4843                                 return -EIO;
4844         }
4845         return decode_ace(xdr, NULL, res->server->nfs_client);
4846 out_overflow:
4847         print_overflow_msg(__func__, xdr);
4848         return -EIO;
4849 }
4850
4851 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4852 {
4853         __be32 *p;
4854         uint32_t savewords, bmlen, i;
4855         int status;
4856
4857         status = decode_op_hdr(xdr, OP_OPEN);
4858         if (status != -EIO)
4859                 nfs_increment_open_seqid(status, res->seqid);
4860         if (!status)
4861                 status = decode_stateid(xdr, &res->stateid);
4862         if (unlikely(status))
4863                 return status;
4864
4865         decode_change_info(xdr, &res->cinfo);
4866
4867         p = xdr_inline_decode(xdr, 8);
4868         if (unlikely(!p))
4869                 goto out_overflow;
4870         res->rflags = be32_to_cpup(p++);
4871         bmlen = be32_to_cpup(p);
4872         if (bmlen > 10)
4873                 goto xdr_error;
4874
4875         p = xdr_inline_decode(xdr, bmlen << 2);
4876         if (unlikely(!p))
4877                 goto out_overflow;
4878         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4879         for (i = 0; i < savewords; ++i)
4880                 res->attrset[i] = be32_to_cpup(p++);
4881         for (; i < NFS4_BITMAP_SIZE; i++)
4882                 res->attrset[i] = 0;
4883
4884         return decode_delegation(xdr, res);
4885 xdr_error:
4886         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4887         return -EIO;
4888 out_overflow:
4889         print_overflow_msg(__func__, xdr);
4890         return -EIO;
4891 }
4892
4893 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4894 {
4895         int status;
4896
4897         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4898         if (status != -EIO)
4899                 nfs_increment_open_seqid(status, res->seqid);
4900         if (!status)
4901                 status = decode_stateid(xdr, &res->stateid);
4902         return status;
4903 }
4904
4905 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4906 {
4907         int status;
4908
4909         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4910         if (status != -EIO)
4911                 nfs_increment_open_seqid(status, res->seqid);
4912         if (!status)
4913                 status = decode_stateid(xdr, &res->stateid);
4914         return status;
4915 }
4916
4917 static int decode_putfh(struct xdr_stream *xdr)
4918 {
4919         return decode_op_hdr(xdr, OP_PUTFH);
4920 }
4921
4922 static int decode_putrootfh(struct xdr_stream *xdr)
4923 {
4924         return decode_op_hdr(xdr, OP_PUTROOTFH);
4925 }
4926
4927 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4928 {
4929         __be32 *p;
4930         uint32_t count, eof, recvd;
4931         int status;
4932
4933         status = decode_op_hdr(xdr, OP_READ);
4934         if (status)
4935                 return status;
4936         p = xdr_inline_decode(xdr, 8);
4937         if (unlikely(!p))
4938                 goto out_overflow;
4939         eof = be32_to_cpup(p++);
4940         count = be32_to_cpup(p);
4941         recvd = xdr_read_pages(xdr, count);
4942         if (count > recvd) {
4943                 dprintk("NFS: server cheating in read reply: "
4944                                 "count %u > recvd %u\n", count, recvd);
4945                 count = recvd;
4946                 eof = 0;
4947         }
4948         res->eof = eof;
4949         res->count = count;
4950         return 0;
4951 out_overflow:
4952         print_overflow_msg(__func__, xdr);
4953         return -EIO;
4954 }
4955
4956 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4957 {
4958         int             status;
4959         __be32          verf[2];
4960
4961         status = decode_op_hdr(xdr, OP_READDIR);
4962         if (!status)
4963                 status = decode_verifier(xdr, readdir->verifier.data);
4964         if (unlikely(status))
4965                 return status;
4966         memcpy(verf, readdir->verifier.data, sizeof(verf));
4967         dprintk("%s: verifier = %08x:%08x\n",
4968                         __func__, verf[0], verf[1]);
4969         return xdr_read_pages(xdr, xdr->buf->page_len);
4970 }
4971
4972 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4973 {
4974         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4975         u32 len, recvd;
4976         __be32 *p;
4977         int status;
4978
4979         status = decode_op_hdr(xdr, OP_READLINK);
4980         if (status)
4981                 return status;
4982
4983         /* Convert length of symlink */
4984         p = xdr_inline_decode(xdr, 4);
4985         if (unlikely(!p))
4986                 goto out_overflow;
4987         len = be32_to_cpup(p);
4988         if (len >= rcvbuf->page_len || len <= 0) {
4989                 dprintk("nfs: server returned giant symlink!\n");
4990                 return -ENAMETOOLONG;
4991         }
4992         recvd = xdr_read_pages(xdr, len);
4993         if (recvd < len) {
4994                 dprintk("NFS: server cheating in readlink reply: "
4995                                 "count %u > recvd %u\n", len, recvd);
4996                 return -EIO;
4997         }
4998         /*
4999          * The XDR encode routine has set things up so that
5000          * the link text will be copied directly into the
5001          * buffer.  We just have to do overflow-checking,
5002          * and and null-terminate the text (the VFS expects
5003          * null-termination).
5004          */
5005         xdr_terminate_string(rcvbuf, len);
5006         return 0;
5007 out_overflow:
5008         print_overflow_msg(__func__, xdr);
5009         return -EIO;
5010 }
5011
5012 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5013 {
5014         int status;
5015
5016         status = decode_op_hdr(xdr, OP_REMOVE);
5017         if (status)
5018                 goto out;
5019         status = decode_change_info(xdr, cinfo);
5020 out:
5021         return status;
5022 }
5023
5024 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5025               struct nfs4_change_info *new_cinfo)
5026 {
5027         int status;
5028
5029         status = decode_op_hdr(xdr, OP_RENAME);
5030         if (status)
5031                 goto out;
5032         if ((status = decode_change_info(xdr, old_cinfo)))
5033                 goto out;
5034         status = decode_change_info(xdr, new_cinfo);
5035 out:
5036         return status;
5037 }
5038
5039 static int decode_renew(struct xdr_stream *xdr)
5040 {
5041         return decode_op_hdr(xdr, OP_RENEW);
5042 }
5043
5044 static int
5045 decode_restorefh(struct xdr_stream *xdr)
5046 {
5047         return decode_op_hdr(xdr, OP_RESTOREFH);
5048 }
5049
5050 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5051                          struct nfs_getaclres *res)
5052 {
5053         unsigned int savep;
5054         __be32 *bm_p;
5055         uint32_t attrlen,
5056                  bitmap[3] = {0};
5057         int status;
5058         size_t page_len = xdr->buf->page_len;
5059
5060         res->acl_len = 0;
5061         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5062                 goto out;
5063
5064         bm_p = xdr->p;
5065         res->acl_data_offset = be32_to_cpup(bm_p) + 2;
5066         res->acl_data_offset <<= 2;
5067         /* Check if the acl data starts beyond the allocated buffer */
5068         if (res->acl_data_offset > page_len)
5069                 return -ERANGE;
5070
5071         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5072                 goto out;
5073         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5074                 goto out;
5075
5076         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5077                 return -EIO;
5078         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5079
5080                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5081                  * are stored with the acl data to handle the problem of
5082                  * variable length bitmaps.*/
5083                 xdr->p = bm_p;
5084
5085                 /* We ignore &savep and don't do consistency checks on
5086                  * the attr length.  Let userspace figure it out.... */
5087                 attrlen += res->acl_data_offset;
5088                 if (attrlen > page_len) {
5089                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
5090                                 /* getxattr interface called with a NULL buf */
5091                                 res->acl_len = attrlen;
5092                                 goto out;
5093                         }
5094                         dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5095                                         attrlen, page_len);
5096                         return -EINVAL;
5097                 }
5098                 xdr_read_pages(xdr, attrlen);
5099                 res->acl_len = attrlen;
5100         } else
5101                 status = -EOPNOTSUPP;
5102
5103 out:
5104         return status;
5105 }
5106
5107 static int
5108 decode_savefh(struct xdr_stream *xdr)
5109 {
5110         return decode_op_hdr(xdr, OP_SAVEFH);
5111 }
5112
5113 static int decode_setattr(struct xdr_stream *xdr)
5114 {
5115         __be32 *p;
5116         uint32_t bmlen;
5117         int status;
5118
5119         status = decode_op_hdr(xdr, OP_SETATTR);
5120         if (status)
5121                 return status;
5122         p = xdr_inline_decode(xdr, 4);
5123         if (unlikely(!p))
5124                 goto out_overflow;
5125         bmlen = be32_to_cpup(p);
5126         p = xdr_inline_decode(xdr, bmlen << 2);
5127         if (likely(p))
5128                 return 0;
5129 out_overflow:
5130         print_overflow_msg(__func__, xdr);
5131         return -EIO;
5132 }
5133
5134 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5135 {
5136         __be32 *p;
5137         uint32_t opnum;
5138         int32_t nfserr;
5139
5140         p = xdr_inline_decode(xdr, 8);
5141         if (unlikely(!p))
5142                 goto out_overflow;
5143         opnum = be32_to_cpup(p++);
5144         if (opnum != OP_SETCLIENTID) {
5145                 dprintk("nfs: decode_setclientid: Server returned operation"
5146                         " %d\n", opnum);
5147                 return -EIO;
5148         }
5149         nfserr = be32_to_cpup(p);
5150         if (nfserr == NFS_OK) {
5151                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5152                 if (unlikely(!p))
5153                         goto out_overflow;
5154                 p = xdr_decode_hyper(p, &res->clientid);
5155                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5156         } else if (nfserr == NFSERR_CLID_INUSE) {
5157                 uint32_t len;
5158
5159                 /* skip netid string */
5160                 p = xdr_inline_decode(xdr, 4);
5161                 if (unlikely(!p))
5162                         goto out_overflow;
5163                 len = be32_to_cpup(p);
5164                 p = xdr_inline_decode(xdr, len);
5165                 if (unlikely(!p))
5166                         goto out_overflow;
5167
5168                 /* skip uaddr string */
5169                 p = xdr_inline_decode(xdr, 4);
5170                 if (unlikely(!p))
5171                         goto out_overflow;
5172                 len = be32_to_cpup(p);
5173                 p = xdr_inline_decode(xdr, len);
5174                 if (unlikely(!p))
5175                         goto out_overflow;
5176                 return -NFSERR_CLID_INUSE;
5177         } else
5178                 return nfs4_stat_to_errno(nfserr);
5179
5180         return 0;
5181 out_overflow:
5182         print_overflow_msg(__func__, xdr);
5183         return -EIO;
5184 }
5185
5186 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5187 {
5188         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5189 }
5190
5191 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5192 {
5193         __be32 *p;
5194         int status;
5195
5196         status = decode_op_hdr(xdr, OP_WRITE);
5197         if (status)
5198                 return status;
5199
5200         p = xdr_inline_decode(xdr, 8);
5201         if (unlikely(!p))
5202                 goto out_overflow;
5203         res->count = be32_to_cpup(p++);
5204         res->verf->committed = be32_to_cpup(p++);
5205         return decode_write_verifier(xdr, &res->verf->verifier);
5206 out_overflow:
5207         print_overflow_msg(__func__, xdr);
5208         return -EIO;
5209 }
5210
5211 static int decode_delegreturn(struct xdr_stream *xdr)
5212 {
5213         return decode_op_hdr(xdr, OP_DELEGRETURN);
5214 }
5215
5216 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5217 {
5218         __be32 *p;
5219
5220         p = xdr_inline_decode(xdr, 4);
5221         if (unlikely(!p))
5222                 goto out_overflow;
5223         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5224         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5225                 goto out_err;
5226
5227         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5228         if (unlikely(!p))
5229                 goto out_overflow;
5230         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5231
5232         p = xdr_inline_decode(xdr, 8);
5233         if (unlikely(!p))
5234                 goto out_overflow;
5235         flavor->gss.qop4 = be32_to_cpup(p++);
5236         flavor->gss.service = be32_to_cpup(p);
5237
5238         return 0;
5239
5240 out_overflow:
5241         print_overflow_msg(__func__, xdr);
5242         return -EIO;
5243 out_err:
5244         return -EINVAL;
5245 }
5246
5247 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5248 {
5249         struct nfs4_secinfo_flavor *sec_flavor;
5250         int status;
5251         __be32 *p;
5252         int i, num_flavors;
5253
5254         p = xdr_inline_decode(xdr, 4);
5255         if (unlikely(!p))
5256                 goto out_overflow;
5257
5258         res->flavors->num_flavors = 0;
5259         num_flavors = be32_to_cpup(p);
5260
5261         for (i = 0; i < num_flavors; i++) {
5262                 sec_flavor = &res->flavors->flavors[i];
5263                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5264                         break;
5265
5266                 p = xdr_inline_decode(xdr, 4);
5267                 if (unlikely(!p))
5268                         goto out_overflow;
5269                 sec_flavor->flavor = be32_to_cpup(p);
5270
5271                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5272                         status = decode_secinfo_gss(xdr, sec_flavor);
5273                         if (status)
5274                                 goto out;
5275                 }
5276                 res->flavors->num_flavors++;
5277         }
5278
5279         status = 0;
5280 out:
5281         return status;
5282 out_overflow:
5283         print_overflow_msg(__func__, xdr);
5284         return -EIO;
5285 }
5286
5287 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5288 {
5289         int status = decode_op_hdr(xdr, OP_SECINFO);
5290         if (status)
5291                 return status;
5292         return decode_secinfo_common(xdr, res);
5293 }
5294
5295 #if defined(CONFIG_NFS_V4_1)
5296 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5297 {
5298         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5299         if (status)
5300                 return status;
5301         return decode_secinfo_common(xdr, res);
5302 }
5303
5304 static int decode_exchange_id(struct xdr_stream *xdr,
5305                               struct nfs41_exchange_id_res *res)
5306 {
5307         __be32 *p;
5308         uint32_t dummy;
5309         char *dummy_str;
5310         int status;
5311         uint32_t impl_id_count;
5312
5313         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5314         if (status)
5315                 return status;
5316
5317         p = xdr_inline_decode(xdr, 8);
5318         if (unlikely(!p))
5319                 goto out_overflow;
5320         xdr_decode_hyper(p, &res->clientid);
5321         p = xdr_inline_decode(xdr, 12);
5322         if (unlikely(!p))
5323                 goto out_overflow;
5324         res->seqid = be32_to_cpup(p++);
5325         res->flags = be32_to_cpup(p++);
5326
5327         /* We ask for SP4_NONE */
5328         dummy = be32_to_cpup(p);
5329         if (dummy != SP4_NONE)
5330                 return -EIO;
5331
5332         /* server_owner4.so_minor_id */
5333         p = xdr_inline_decode(xdr, 8);
5334         if (unlikely(!p))
5335                 goto out_overflow;
5336         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5337
5338         /* server_owner4.so_major_id */
5339         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5340         if (unlikely(status))
5341                 return status;
5342         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5343                 return -EIO;
5344         memcpy(res->server_owner->major_id, dummy_str, dummy);
5345         res->server_owner->major_id_sz = dummy;
5346
5347         /* server_scope4 */
5348         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5349         if (unlikely(status))
5350                 return status;
5351         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5352                 return -EIO;
5353         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5354         res->server_scope->server_scope_sz = dummy;
5355
5356         /* Implementation Id */
5357         p = xdr_inline_decode(xdr, 4);
5358         if (unlikely(!p))
5359                 goto out_overflow;
5360         impl_id_count = be32_to_cpup(p++);
5361
5362         if (impl_id_count) {
5363                 /* nii_domain */
5364                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5365                 if (unlikely(status))
5366                         return status;
5367                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5368                         return -EIO;
5369                 memcpy(res->impl_id->domain, dummy_str, dummy);
5370
5371                 /* nii_name */
5372                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5373                 if (unlikely(status))
5374                         return status;
5375                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5376                         return -EIO;
5377                 memcpy(res->impl_id->name, dummy_str, dummy);
5378
5379                 /* nii_date */
5380                 p = xdr_inline_decode(xdr, 12);
5381                 if (unlikely(!p))
5382                         goto out_overflow;
5383                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5384                 res->impl_id->date.nseconds = be32_to_cpup(p);
5385
5386                 /* if there's more than one entry, ignore the rest */
5387         }
5388         return 0;
5389 out_overflow:
5390         print_overflow_msg(__func__, xdr);
5391         return -EIO;
5392 }
5393
5394 static int decode_chan_attrs(struct xdr_stream *xdr,
5395                              struct nfs4_channel_attrs *attrs)
5396 {
5397         __be32 *p;
5398         u32 nr_attrs, val;
5399
5400         p = xdr_inline_decode(xdr, 28);
5401         if (unlikely(!p))
5402                 goto out_overflow;
5403         val = be32_to_cpup(p++);        /* headerpadsz */
5404         if (val)
5405                 return -EINVAL;         /* no support for header padding yet */
5406         attrs->max_rqst_sz = be32_to_cpup(p++);
5407         attrs->max_resp_sz = be32_to_cpup(p++);
5408         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5409         attrs->max_ops = be32_to_cpup(p++);
5410         attrs->max_reqs = be32_to_cpup(p++);
5411         nr_attrs = be32_to_cpup(p);
5412         if (unlikely(nr_attrs > 1)) {
5413                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5414                         "count %u\n", __func__, nr_attrs);
5415                 return -EINVAL;
5416         }
5417         if (nr_attrs == 1) {
5418                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5419                 if (unlikely(!p))
5420                         goto out_overflow;
5421         }
5422         return 0;
5423 out_overflow:
5424         print_overflow_msg(__func__, xdr);
5425         return -EIO;
5426 }
5427
5428 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5429 {
5430         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5431 }
5432
5433 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5434                                 struct nfs41_bind_conn_to_session_res *res)
5435 {
5436         __be32 *p;
5437         int status;
5438
5439         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5440         if (!status)
5441                 status = decode_sessionid(xdr, &res->session->sess_id);
5442         if (unlikely(status))
5443                 return status;
5444
5445         /* dir flags, rdma mode bool */
5446         p = xdr_inline_decode(xdr, 8);
5447         if (unlikely(!p))
5448                 goto out_overflow;
5449
5450         res->dir = be32_to_cpup(p++);
5451         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5452                 return -EIO;
5453         if (be32_to_cpup(p) == 0)
5454                 res->use_conn_in_rdma_mode = false;
5455         else
5456                 res->use_conn_in_rdma_mode = true;
5457
5458         return 0;
5459 out_overflow:
5460         print_overflow_msg(__func__, xdr);
5461         return -EIO;
5462 }
5463
5464 static int decode_create_session(struct xdr_stream *xdr,
5465                                  struct nfs41_create_session_res *res)
5466 {
5467         __be32 *p;
5468         int status;
5469         struct nfs_client *clp = res->client;
5470         struct nfs4_session *session = clp->cl_session;
5471
5472         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5473         if (!status)
5474                 status = decode_sessionid(xdr, &session->sess_id);
5475         if (unlikely(status))
5476                 return status;
5477
5478         /* seqid, flags */
5479         p = xdr_inline_decode(xdr, 8);
5480         if (unlikely(!p))
5481                 goto out_overflow;
5482         clp->cl_seqid = be32_to_cpup(p++);
5483         session->flags = be32_to_cpup(p);
5484
5485         /* Channel attributes */
5486         status = decode_chan_attrs(xdr, &session->fc_attrs);
5487         if (!status)
5488                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5489         return status;
5490 out_overflow:
5491         print_overflow_msg(__func__, xdr);
5492         return -EIO;
5493 }
5494
5495 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5496 {
5497         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5498 }
5499
5500 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5501 {
5502         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5503 }
5504
5505 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5506 {
5507         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5508 }
5509 #endif /* CONFIG_NFS_V4_1 */
5510
5511 static int decode_sequence(struct xdr_stream *xdr,
5512                            struct nfs4_sequence_res *res,
5513                            struct rpc_rqst *rqstp)
5514 {
5515 #if defined(CONFIG_NFS_V4_1)
5516         struct nfs4_sessionid id;
5517         u32 dummy;
5518         int status;
5519         __be32 *p;
5520
5521         if (!res->sr_session)
5522                 return 0;
5523
5524         status = decode_op_hdr(xdr, OP_SEQUENCE);
5525         if (!status)
5526                 status = decode_sessionid(xdr, &id);
5527         if (unlikely(status))
5528                 goto out_err;
5529
5530         /*
5531          * If the server returns different values for sessionID, slotID or
5532          * sequence number, the server is looney tunes.
5533          */
5534         status = -EREMOTEIO;
5535
5536         if (memcmp(id.data, res->sr_session->sess_id.data,
5537                    NFS4_MAX_SESSIONID_LEN)) {
5538                 dprintk("%s Invalid session id\n", __func__);
5539                 goto out_err;
5540         }
5541
5542         p = xdr_inline_decode(xdr, 20);
5543         if (unlikely(!p))
5544                 goto out_overflow;
5545
5546         /* seqid */
5547         dummy = be32_to_cpup(p++);
5548         if (dummy != res->sr_slot->seq_nr) {
5549                 dprintk("%s Invalid sequence number\n", __func__);
5550                 goto out_err;
5551         }
5552         /* slot id */
5553         dummy = be32_to_cpup(p++);
5554         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5555                 dprintk("%s Invalid slot id\n", __func__);
5556                 goto out_err;
5557         }
5558         /* highest slot id - currently not processed */
5559         dummy = be32_to_cpup(p++);
5560         /* target highest slot id - currently not processed */
5561         dummy = be32_to_cpup(p++);
5562         /* result flags */
5563         res->sr_status_flags = be32_to_cpup(p);
5564         status = 0;
5565 out_err:
5566         res->sr_status = status;
5567         return status;
5568 out_overflow:
5569         print_overflow_msg(__func__, xdr);
5570         status = -EIO;
5571         goto out_err;
5572 #else  /* CONFIG_NFS_V4_1 */
5573         return 0;
5574 #endif /* CONFIG_NFS_V4_1 */
5575 }
5576
5577 #if defined(CONFIG_NFS_V4_1)
5578 /*
5579  * TODO: Need to handle case when EOF != true;
5580  */
5581 static int decode_getdevicelist(struct xdr_stream *xdr,
5582                                 struct pnfs_devicelist *res)
5583 {
5584         __be32 *p;
5585         int status, i;
5586         nfs4_verifier verftemp;
5587
5588         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5589         if (status)
5590                 return status;
5591
5592         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5593         if (unlikely(!p))
5594                 goto out_overflow;
5595
5596         /* TODO: Skip cookie for now */
5597         p += 2;
5598
5599         /* Read verifier */
5600         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5601
5602         res->num_devs = be32_to_cpup(p);
5603
5604         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5605
5606         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5607                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5608                                 __func__, res->num_devs);
5609                 return -EIO;
5610         }
5611
5612         p = xdr_inline_decode(xdr,
5613                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5614         if (unlikely(!p))
5615                 goto out_overflow;
5616         for (i = 0; i < res->num_devs; i++)
5617                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5618                                             NFS4_DEVICEID4_SIZE);
5619         res->eof = be32_to_cpup(p);
5620         return 0;
5621 out_overflow:
5622         print_overflow_msg(__func__, xdr);
5623         return -EIO;
5624 }
5625
5626 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5627                                 struct pnfs_device *pdev)
5628 {
5629         __be32 *p;
5630         uint32_t len, type;
5631         int status;
5632
5633         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5634         if (status) {
5635                 if (status == -ETOOSMALL) {
5636                         p = xdr_inline_decode(xdr, 4);
5637                         if (unlikely(!p))
5638                                 goto out_overflow;
5639                         pdev->mincount = be32_to_cpup(p);
5640                         dprintk("%s: Min count too small. mincnt = %u\n",
5641                                 __func__, pdev->mincount);
5642                 }
5643                 return status;
5644         }
5645
5646         p = xdr_inline_decode(xdr, 8);
5647         if (unlikely(!p))
5648                 goto out_overflow;
5649         type = be32_to_cpup(p++);
5650         if (type != pdev->layout_type) {
5651                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5652                         __func__, pdev->layout_type, type);
5653                 return -EINVAL;
5654         }
5655         /*
5656          * Get the length of the opaque device_addr4. xdr_read_pages places
5657          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5658          * and places the remaining xdr data in xdr_buf->tail
5659          */
5660         pdev->mincount = be32_to_cpup(p);
5661         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5662
5663         /* Parse notification bitmap, verifying that it is zero. */
5664         p = xdr_inline_decode(xdr, 4);
5665         if (unlikely(!p))
5666                 goto out_overflow;
5667         len = be32_to_cpup(p);
5668         if (len) {
5669                 uint32_t i;
5670
5671                 p = xdr_inline_decode(xdr, 4 * len);
5672                 if (unlikely(!p))
5673                         goto out_overflow;
5674                 for (i = 0; i < len; i++, p++) {
5675                         if (be32_to_cpup(p)) {
5676                                 dprintk("%s: notifications not supported\n",
5677                                         __func__);
5678                                 return -EIO;
5679                         }
5680                 }
5681         }
5682         return 0;
5683 out_overflow:
5684         print_overflow_msg(__func__, xdr);
5685         return -EIO;
5686 }
5687
5688 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5689                             struct nfs4_layoutget_res *res)
5690 {
5691         __be32 *p;
5692         int status;
5693         u32 layout_count;
5694         u32 recvd;
5695
5696         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5697         if (status)
5698                 return status;
5699         p = xdr_inline_decode(xdr, 4);
5700         if (unlikely(!p))
5701                 goto out_overflow;
5702         res->return_on_close = be32_to_cpup(p);
5703         decode_stateid(xdr, &res->stateid);
5704         p = xdr_inline_decode(xdr, 4);
5705         if (unlikely(!p))
5706                 goto out_overflow;
5707         layout_count = be32_to_cpup(p);
5708         if (!layout_count) {
5709                 dprintk("%s: server responded with empty layout array\n",
5710                         __func__);
5711                 return -EINVAL;
5712         }
5713
5714         p = xdr_inline_decode(xdr, 28);
5715         if (unlikely(!p))
5716                 goto out_overflow;
5717         p = xdr_decode_hyper(p, &res->range.offset);
5718         p = xdr_decode_hyper(p, &res->range.length);
5719         res->range.iomode = be32_to_cpup(p++);
5720         res->type = be32_to_cpup(p++);
5721         res->layoutp->len = be32_to_cpup(p);
5722
5723         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5724                 __func__,
5725                 (unsigned long)res->range.offset,
5726                 (unsigned long)res->range.length,
5727                 res->range.iomode,
5728                 res->type,
5729                 res->layoutp->len);
5730
5731         recvd = xdr_read_pages(xdr, res->layoutp->len);
5732         if (res->layoutp->len > recvd) {
5733                 dprintk("NFS: server cheating in layoutget reply: "
5734                                 "layout len %u > recvd %u\n",
5735                                 res->layoutp->len, recvd);
5736                 return -EINVAL;
5737         }
5738
5739         if (layout_count > 1) {
5740                 /* We only handle a length one array at the moment.  Any
5741                  * further entries are just ignored.  Note that this means
5742                  * the client may see a response that is less than the
5743                  * minimum it requested.
5744                  */
5745                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5746                         __func__, layout_count);
5747         }
5748
5749         return 0;
5750 out_overflow:
5751         print_overflow_msg(__func__, xdr);
5752         return -EIO;
5753 }
5754
5755 static int decode_layoutreturn(struct xdr_stream *xdr,
5756                                struct nfs4_layoutreturn_res *res)
5757 {
5758         __be32 *p;
5759         int status;
5760
5761         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5762         if (status)
5763                 return status;
5764         p = xdr_inline_decode(xdr, 4);
5765         if (unlikely(!p))
5766                 goto out_overflow;
5767         res->lrs_present = be32_to_cpup(p);
5768         if (res->lrs_present)
5769                 status = decode_stateid(xdr, &res->stateid);
5770         return status;
5771 out_overflow:
5772         print_overflow_msg(__func__, xdr);
5773         return -EIO;
5774 }
5775
5776 static int decode_layoutcommit(struct xdr_stream *xdr,
5777                                struct rpc_rqst *req,
5778                                struct nfs4_layoutcommit_res *res)
5779 {
5780         __be32 *p;
5781         __u32 sizechanged;
5782         int status;
5783
5784         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5785         res->status = status;
5786         if (status)
5787                 return status;
5788
5789         p = xdr_inline_decode(xdr, 4);
5790         if (unlikely(!p))
5791                 goto out_overflow;
5792         sizechanged = be32_to_cpup(p);
5793
5794         if (sizechanged) {
5795                 /* throw away new size */
5796                 p = xdr_inline_decode(xdr, 8);
5797                 if (unlikely(!p))
5798                         goto out_overflow;
5799         }
5800         return 0;
5801 out_overflow:
5802         print_overflow_msg(__func__, xdr);
5803         return -EIO;
5804 }
5805
5806 static int decode_test_stateid(struct xdr_stream *xdr,
5807                                struct nfs41_test_stateid_res *res)
5808 {
5809         __be32 *p;
5810         int status;
5811         int num_res;
5812
5813         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5814         if (status)
5815                 return status;
5816
5817         p = xdr_inline_decode(xdr, 4);
5818         if (unlikely(!p))
5819                 goto out_overflow;
5820         num_res = be32_to_cpup(p++);
5821         if (num_res != 1)
5822                 goto out;
5823
5824         p = xdr_inline_decode(xdr, 4);
5825         if (unlikely(!p))
5826                 goto out_overflow;
5827         res->status = be32_to_cpup(p++);
5828
5829         return status;
5830 out_overflow:
5831         print_overflow_msg(__func__, xdr);
5832 out:
5833         return -EIO;
5834 }
5835
5836 static int decode_free_stateid(struct xdr_stream *xdr,
5837                                struct nfs41_free_stateid_res *res)
5838 {
5839         __be32 *p;
5840         int status;
5841
5842         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5843         if (status)
5844                 return status;
5845
5846         p = xdr_inline_decode(xdr, 4);
5847         if (unlikely(!p))
5848                 goto out_overflow;
5849         res->status = be32_to_cpup(p++);
5850         return res->status;
5851 out_overflow:
5852         print_overflow_msg(__func__, xdr);
5853         return -EIO;
5854 }
5855 #endif /* CONFIG_NFS_V4_1 */
5856
5857 /*
5858  * END OF "GENERIC" DECODE ROUTINES.
5859  */
5860
5861 /*
5862  * Decode OPEN_DOWNGRADE response
5863  */
5864 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5865                                        struct xdr_stream *xdr,
5866                                        struct nfs_closeres *res)
5867 {
5868         struct compound_hdr hdr;
5869         int status;
5870
5871         status = decode_compound_hdr(xdr, &hdr);
5872         if (status)
5873                 goto out;
5874         status = decode_sequence(xdr, &res->seq_res, rqstp);
5875         if (status)
5876                 goto out;
5877         status = decode_putfh(xdr);
5878         if (status)
5879                 goto out;
5880         status = decode_open_downgrade(xdr, res);
5881         if (status != 0)
5882                 goto out;
5883         decode_getfattr(xdr, res->fattr, res->server);
5884 out:
5885         return status;
5886 }
5887
5888 /*
5889  * Decode ACCESS response
5890  */
5891 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5892                                struct nfs4_accessres *res)
5893 {
5894         struct compound_hdr hdr;
5895         int status;
5896
5897         status = decode_compound_hdr(xdr, &hdr);
5898         if (status)
5899                 goto out;
5900         status = decode_sequence(xdr, &res->seq_res, rqstp);
5901         if (status)
5902                 goto out;
5903         status = decode_putfh(xdr);
5904         if (status != 0)
5905                 goto out;
5906         status = decode_access(xdr, res);
5907         if (status != 0)
5908                 goto out;
5909         decode_getfattr(xdr, res->fattr, res->server);
5910 out:
5911         return status;
5912 }
5913
5914 /*
5915  * Decode LOOKUP response
5916  */
5917 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5918                                struct nfs4_lookup_res *res)
5919 {
5920         struct compound_hdr hdr;
5921         int status;
5922
5923         status = decode_compound_hdr(xdr, &hdr);
5924         if (status)
5925                 goto out;
5926         status = decode_sequence(xdr, &res->seq_res, rqstp);
5927         if (status)
5928                 goto out;
5929         status = decode_putfh(xdr);
5930         if (status)
5931                 goto out;
5932         status = decode_lookup(xdr);
5933         if (status)
5934                 goto out;
5935         status = decode_getfh(xdr, res->fh);
5936         if (status)
5937                 goto out;
5938         status = decode_getfattr(xdr, res->fattr, res->server);
5939 out:
5940         return status;
5941 }
5942
5943 /*
5944  * Decode LOOKUP_ROOT response
5945  */
5946 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5947                                     struct xdr_stream *xdr,
5948                                     struct nfs4_lookup_res *res)
5949 {
5950         struct compound_hdr hdr;
5951         int status;
5952
5953         status = decode_compound_hdr(xdr, &hdr);
5954         if (status)
5955                 goto out;
5956         status = decode_sequence(xdr, &res->seq_res, rqstp);
5957         if (status)
5958                 goto out;
5959         status = decode_putrootfh(xdr);
5960         if (status)
5961                 goto out;
5962         status = decode_getfh(xdr, res->fh);
5963         if (status == 0)
5964                 status = decode_getfattr(xdr, res->fattr, res->server);
5965 out:
5966         return status;
5967 }
5968
5969 /*
5970  * Decode REMOVE response
5971  */
5972 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5973                                struct nfs_removeres *res)
5974 {
5975         struct compound_hdr hdr;
5976         int status;
5977
5978         status = decode_compound_hdr(xdr, &hdr);
5979         if (status)
5980                 goto out;
5981         status = decode_sequence(xdr, &res->seq_res, rqstp);
5982         if (status)
5983                 goto out;
5984         status = decode_putfh(xdr);
5985         if (status)
5986                 goto out;
5987         status = decode_remove(xdr, &res->cinfo);
5988 out:
5989         return status;
5990 }
5991
5992 /*
5993  * Decode RENAME response
5994  */
5995 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5996                                struct nfs_renameres *res)
5997 {
5998         struct compound_hdr hdr;
5999         int status;
6000
6001         status = decode_compound_hdr(xdr, &hdr);
6002         if (status)
6003                 goto out;
6004         status = decode_sequence(xdr, &res->seq_res, rqstp);
6005         if (status)
6006                 goto out;
6007         status = decode_putfh(xdr);
6008         if (status)
6009                 goto out;
6010         status = decode_savefh(xdr);
6011         if (status)
6012                 goto out;
6013         status = decode_putfh(xdr);
6014         if (status)
6015                 goto out;
6016         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6017 out:
6018         return status;
6019 }
6020
6021 /*
6022  * Decode LINK response
6023  */
6024 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6025                              struct nfs4_link_res *res)
6026 {
6027         struct compound_hdr hdr;
6028         int status;
6029
6030         status = decode_compound_hdr(xdr, &hdr);
6031         if (status)
6032                 goto out;
6033         status = decode_sequence(xdr, &res->seq_res, rqstp);
6034         if (status)
6035                 goto out;
6036         status = decode_putfh(xdr);
6037         if (status)
6038                 goto out;
6039         status = decode_savefh(xdr);
6040         if (status)
6041                 goto out;
6042         status = decode_putfh(xdr);
6043         if (status)
6044                 goto out;
6045         status = decode_link(xdr, &res->cinfo);
6046         if (status)
6047                 goto out;
6048         /*
6049          * Note order: OP_LINK leaves the directory as the current
6050          *             filehandle.
6051          */
6052         status = decode_restorefh(xdr);
6053         if (status)
6054                 goto out;
6055         decode_getfattr(xdr, res->fattr, res->server);
6056 out:
6057         return status;
6058 }
6059
6060 /*
6061  * Decode CREATE response
6062  */
6063 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6064                                struct nfs4_create_res *res)
6065 {
6066         struct compound_hdr hdr;
6067         int status;
6068
6069         status = decode_compound_hdr(xdr, &hdr);
6070         if (status)
6071                 goto out;
6072         status = decode_sequence(xdr, &res->seq_res, rqstp);
6073         if (status)
6074                 goto out;
6075         status = decode_putfh(xdr);
6076         if (status)
6077                 goto out;
6078         status = decode_create(xdr, &res->dir_cinfo);
6079         if (status)
6080                 goto out;
6081         status = decode_getfh(xdr, res->fh);
6082         if (status)
6083                 goto out;
6084         decode_getfattr(xdr, res->fattr, res->server);
6085 out:
6086         return status;
6087 }
6088
6089 /*
6090  * Decode SYMLINK response
6091  */
6092 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6093                                 struct nfs4_create_res *res)
6094 {
6095         return nfs4_xdr_dec_create(rqstp, xdr, res);
6096 }
6097
6098 /*
6099  * Decode GETATTR response
6100  */
6101 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6102                                 struct nfs4_getattr_res *res)
6103 {
6104         struct compound_hdr hdr;
6105         int status;
6106
6107         status = decode_compound_hdr(xdr, &hdr);
6108         if (status)
6109                 goto out;
6110         status = decode_sequence(xdr, &res->seq_res, rqstp);
6111         if (status)
6112                 goto out;
6113         status = decode_putfh(xdr);
6114         if (status)
6115                 goto out;
6116         status = decode_getfattr(xdr, res->fattr, res->server);
6117 out:
6118         return status;
6119 }
6120
6121 /*
6122  * Encode an SETACL request
6123  */
6124 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6125                                 struct nfs_setaclargs *args)
6126 {
6127         struct compound_hdr hdr = {
6128                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6129         };
6130
6131         encode_compound_hdr(xdr, req, &hdr);
6132         encode_sequence(xdr, &args->seq_args, &hdr);
6133         encode_putfh(xdr, args->fh, &hdr);
6134         encode_setacl(xdr, args, &hdr);
6135         encode_nops(&hdr);
6136 }
6137
6138 /*
6139  * Decode SETACL response
6140  */
6141 static int
6142 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6143                     struct nfs_setaclres *res)
6144 {
6145         struct compound_hdr hdr;
6146         int status;
6147
6148         status = decode_compound_hdr(xdr, &hdr);
6149         if (status)
6150                 goto out;
6151         status = decode_sequence(xdr, &res->seq_res, rqstp);
6152         if (status)
6153                 goto out;
6154         status = decode_putfh(xdr);
6155         if (status)
6156                 goto out;
6157         status = decode_setattr(xdr);
6158 out:
6159         return status;
6160 }
6161
6162 /*
6163  * Decode GETACL response
6164  */
6165 static int
6166 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6167                     struct nfs_getaclres *res)
6168 {
6169         struct compound_hdr hdr;
6170         int status;
6171
6172         if (res->acl_scratch != NULL) {
6173                 void *p = page_address(res->acl_scratch);
6174                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6175         }
6176         status = decode_compound_hdr(xdr, &hdr);
6177         if (status)
6178                 goto out;
6179         status = decode_sequence(xdr, &res->seq_res, rqstp);
6180         if (status)
6181                 goto out;
6182         status = decode_putfh(xdr);
6183         if (status)
6184                 goto out;
6185         status = decode_getacl(xdr, rqstp, res);
6186
6187 out:
6188         return status;
6189 }
6190
6191 /*
6192  * Decode CLOSE response
6193  */
6194 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6195                               struct nfs_closeres *res)
6196 {
6197         struct compound_hdr hdr;
6198         int status;
6199
6200         status = decode_compound_hdr(xdr, &hdr);
6201         if (status)
6202                 goto out;
6203         status = decode_sequence(xdr, &res->seq_res, rqstp);
6204         if (status)
6205                 goto out;
6206         status = decode_putfh(xdr);
6207         if (status)
6208                 goto out;
6209         status = decode_close(xdr, res);
6210         if (status != 0)
6211                 goto out;
6212         /*
6213          * Note: Server may do delete on close for this file
6214          *      in which case the getattr call will fail with
6215          *      an ESTALE error. Shouldn't be a problem,
6216          *      though, since fattr->valid will remain unset.
6217          */
6218         decode_getfattr(xdr, res->fattr, res->server);
6219 out:
6220         return status;
6221 }
6222
6223 /*
6224  * Decode OPEN response
6225  */
6226 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6227                              struct nfs_openres *res)
6228 {
6229         struct compound_hdr hdr;
6230         int status;
6231
6232         status = decode_compound_hdr(xdr, &hdr);
6233         if (status)
6234                 goto out;
6235         status = decode_sequence(xdr, &res->seq_res, rqstp);
6236         if (status)
6237                 goto out;
6238         status = decode_putfh(xdr);
6239         if (status)
6240                 goto out;
6241         status = decode_open(xdr, res);
6242         if (status)
6243                 goto out;
6244         if (decode_getfh(xdr, &res->fh) != 0)
6245                 goto out;
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         decode_getfattr(xdr, res->f_attr, res->server);
6295 out:
6296         return status;
6297 }
6298
6299 /*
6300  * Decode SETATTR response
6301  */
6302 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6303                                 struct xdr_stream *xdr,
6304                                 struct nfs_setattrres *res)
6305 {
6306         struct compound_hdr hdr;
6307         int status;
6308
6309         status = decode_compound_hdr(xdr, &hdr);
6310         if (status)
6311                 goto out;
6312         status = decode_sequence(xdr, &res->seq_res, rqstp);
6313         if (status)
6314                 goto out;
6315         status = decode_putfh(xdr);
6316         if (status)
6317                 goto out;
6318         status = decode_setattr(xdr);
6319         if (status)
6320                 goto out;
6321         decode_getfattr(xdr, res->fattr, res->server);
6322 out:
6323         return status;
6324 }
6325
6326 /*
6327  * Decode LOCK response
6328  */
6329 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6330                              struct nfs_lock_res *res)
6331 {
6332         struct compound_hdr hdr;
6333         int status;
6334
6335         status = decode_compound_hdr(xdr, &hdr);
6336         if (status)
6337                 goto out;
6338         status = decode_sequence(xdr, &res->seq_res, rqstp);
6339         if (status)
6340                 goto out;
6341         status = decode_putfh(xdr);
6342         if (status)
6343                 goto out;
6344         status = decode_lock(xdr, res);
6345 out:
6346         return status;
6347 }
6348
6349 /*
6350  * Decode LOCKT response
6351  */
6352 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6353                               struct nfs_lockt_res *res)
6354 {
6355         struct compound_hdr hdr;
6356         int status;
6357
6358         status = decode_compound_hdr(xdr, &hdr);
6359         if (status)
6360                 goto out;
6361         status = decode_sequence(xdr, &res->seq_res, rqstp);
6362         if (status)
6363                 goto out;
6364         status = decode_putfh(xdr);
6365         if (status)
6366                 goto out;
6367         status = decode_lockt(xdr, res);
6368 out:
6369         return status;
6370 }
6371
6372 /*
6373  * Decode LOCKU response
6374  */
6375 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6376                               struct nfs_locku_res *res)
6377 {
6378         struct compound_hdr hdr;
6379         int status;
6380
6381         status = decode_compound_hdr(xdr, &hdr);
6382         if (status)
6383                 goto out;
6384         status = decode_sequence(xdr, &res->seq_res, rqstp);
6385         if (status)
6386                 goto out;
6387         status = decode_putfh(xdr);
6388         if (status)
6389                 goto out;
6390         status = decode_locku(xdr, res);
6391 out:
6392         return status;
6393 }
6394
6395 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6396                                           struct xdr_stream *xdr, void *dummy)
6397 {
6398         struct compound_hdr hdr;
6399         int status;
6400
6401         status = decode_compound_hdr(xdr, &hdr);
6402         if (!status)
6403                 status = decode_release_lockowner(xdr);
6404         return status;
6405 }
6406
6407 /*
6408  * Decode READLINK response
6409  */
6410 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6411                                  struct xdr_stream *xdr,
6412                                  struct nfs4_readlink_res *res)
6413 {
6414         struct compound_hdr hdr;
6415         int status;
6416
6417         status = decode_compound_hdr(xdr, &hdr);
6418         if (status)
6419                 goto out;
6420         status = decode_sequence(xdr, &res->seq_res, rqstp);
6421         if (status)
6422                 goto out;
6423         status = decode_putfh(xdr);
6424         if (status)
6425                 goto out;
6426         status = decode_readlink(xdr, rqstp);
6427 out:
6428         return status;
6429 }
6430
6431 /*
6432  * Decode READDIR response
6433  */
6434 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6435                                 struct nfs4_readdir_res *res)
6436 {
6437         struct compound_hdr hdr;
6438         int status;
6439
6440         status = decode_compound_hdr(xdr, &hdr);
6441         if (status)
6442                 goto out;
6443         status = decode_sequence(xdr, &res->seq_res, rqstp);
6444         if (status)
6445                 goto out;
6446         status = decode_putfh(xdr);
6447         if (status)
6448                 goto out;
6449         status = decode_readdir(xdr, rqstp, res);
6450 out:
6451         return status;
6452 }
6453
6454 /*
6455  * Decode Read response
6456  */
6457 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6458                              struct nfs_readres *res)
6459 {
6460         struct compound_hdr hdr;
6461         int status;
6462
6463         status = decode_compound_hdr(xdr, &hdr);
6464         if (status)
6465                 goto out;
6466         status = decode_sequence(xdr, &res->seq_res, rqstp);
6467         if (status)
6468                 goto out;
6469         status = decode_putfh(xdr);
6470         if (status)
6471                 goto out;
6472         status = decode_read(xdr, rqstp, res);
6473         if (!status)
6474                 status = res->count;
6475 out:
6476         return status;
6477 }
6478
6479 /*
6480  * Decode WRITE response
6481  */
6482 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6483                               struct nfs_writeres *res)
6484 {
6485         struct compound_hdr hdr;
6486         int status;
6487
6488         status = decode_compound_hdr(xdr, &hdr);
6489         if (status)
6490                 goto out;
6491         status = decode_sequence(xdr, &res->seq_res, rqstp);
6492         if (status)
6493                 goto out;
6494         status = decode_putfh(xdr);
6495         if (status)
6496                 goto out;
6497         status = decode_write(xdr, res);
6498         if (status)
6499                 goto out;
6500         if (res->fattr)
6501                 decode_getfattr(xdr, res->fattr, res->server);
6502         if (!status)
6503                 status = res->count;
6504 out:
6505         return status;
6506 }
6507
6508 /*
6509  * Decode COMMIT response
6510  */
6511 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6512                                struct nfs_commitres *res)
6513 {
6514         struct compound_hdr hdr;
6515         int status;
6516
6517         status = decode_compound_hdr(xdr, &hdr);
6518         if (status)
6519                 goto out;
6520         status = decode_sequence(xdr, &res->seq_res, rqstp);
6521         if (status)
6522                 goto out;
6523         status = decode_putfh(xdr);
6524         if (status)
6525                 goto out;
6526         status = decode_commit(xdr, res);
6527 out:
6528         return status;
6529 }
6530
6531 /*
6532  * Decode FSINFO response
6533  */
6534 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6535                                struct nfs4_fsinfo_res *res)
6536 {
6537         struct compound_hdr hdr;
6538         int status;
6539
6540         status = decode_compound_hdr(xdr, &hdr);
6541         if (!status)
6542                 status = decode_sequence(xdr, &res->seq_res, req);
6543         if (!status)
6544                 status = decode_putfh(xdr);
6545         if (!status)
6546                 status = decode_fsinfo(xdr, res->fsinfo);
6547         return status;
6548 }
6549
6550 /*
6551  * Decode PATHCONF response
6552  */
6553 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6554                                  struct nfs4_pathconf_res *res)
6555 {
6556         struct compound_hdr hdr;
6557         int status;
6558
6559         status = decode_compound_hdr(xdr, &hdr);
6560         if (!status)
6561                 status = decode_sequence(xdr, &res->seq_res, req);
6562         if (!status)
6563                 status = decode_putfh(xdr);
6564         if (!status)
6565                 status = decode_pathconf(xdr, res->pathconf);
6566         return status;
6567 }
6568
6569 /*
6570  * Decode STATFS response
6571  */
6572 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6573                                struct nfs4_statfs_res *res)
6574 {
6575         struct compound_hdr hdr;
6576         int status;
6577
6578         status = decode_compound_hdr(xdr, &hdr);
6579         if (!status)
6580                 status = decode_sequence(xdr, &res->seq_res, req);
6581         if (!status)
6582                 status = decode_putfh(xdr);
6583         if (!status)
6584                 status = decode_statfs(xdr, res->fsstat);
6585         return status;
6586 }
6587
6588 /*
6589  * Decode GETATTR_BITMAP response
6590  */
6591 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6592                                     struct xdr_stream *xdr,
6593                                     struct nfs4_server_caps_res *res)
6594 {
6595         struct compound_hdr hdr;
6596         int status;
6597
6598         status = decode_compound_hdr(xdr, &hdr);
6599         if (status)
6600                 goto out;
6601         status = decode_sequence(xdr, &res->seq_res, req);
6602         if (status)
6603                 goto out;
6604         status = decode_putfh(xdr);
6605         if (status)
6606                 goto out;
6607         status = decode_server_caps(xdr, res);
6608 out:
6609         return status;
6610 }
6611
6612 /*
6613  * Decode RENEW response
6614  */
6615 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6616                               void *__unused)
6617 {
6618         struct compound_hdr hdr;
6619         int status;
6620
6621         status = decode_compound_hdr(xdr, &hdr);
6622         if (!status)
6623                 status = decode_renew(xdr);
6624         return status;
6625 }
6626
6627 /*
6628  * Decode SETCLIENTID response
6629  */
6630 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6631                                     struct xdr_stream *xdr,
6632                                     struct nfs4_setclientid_res *res)
6633 {
6634         struct compound_hdr hdr;
6635         int status;
6636
6637         status = decode_compound_hdr(xdr, &hdr);
6638         if (!status)
6639                 status = decode_setclientid(xdr, res);
6640         return status;
6641 }
6642
6643 /*
6644  * Decode SETCLIENTID_CONFIRM response
6645  */
6646 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6647                                             struct xdr_stream *xdr,
6648                                             struct nfs_fsinfo *fsinfo)
6649 {
6650         struct compound_hdr hdr;
6651         int status;
6652
6653         status = decode_compound_hdr(xdr, &hdr);
6654         if (!status)
6655                 status = decode_setclientid_confirm(xdr);
6656         if (!status)
6657                 status = decode_putrootfh(xdr);
6658         if (!status)
6659                 status = decode_fsinfo(xdr, fsinfo);
6660         return status;
6661 }
6662
6663 /*
6664  * Decode DELEGRETURN response
6665  */
6666 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6667                                     struct xdr_stream *xdr,
6668                                     struct nfs4_delegreturnres *res)
6669 {
6670         struct compound_hdr hdr;
6671         int status;
6672
6673         status = decode_compound_hdr(xdr, &hdr);
6674         if (status)
6675                 goto out;
6676         status = decode_sequence(xdr, &res->seq_res, rqstp);
6677         if (status)
6678                 goto out;
6679         status = decode_putfh(xdr);
6680         if (status != 0)
6681                 goto out;
6682         status = decode_getfattr(xdr, res->fattr, res->server);
6683         if (status != 0)
6684                 goto out;
6685         status = decode_delegreturn(xdr);
6686 out:
6687         return status;
6688 }
6689
6690 /*
6691  * Decode FS_LOCATIONS response
6692  */
6693 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6694                                      struct xdr_stream *xdr,
6695                                      struct nfs4_fs_locations_res *res)
6696 {
6697         struct compound_hdr hdr;
6698         int status;
6699
6700         status = decode_compound_hdr(xdr, &hdr);
6701         if (status)
6702                 goto out;
6703         status = decode_sequence(xdr, &res->seq_res, req);
6704         if (status)
6705                 goto out;
6706         status = decode_putfh(xdr);
6707         if (status)
6708                 goto out;
6709         status = decode_lookup(xdr);
6710         if (status)
6711                 goto out;
6712         xdr_enter_page(xdr, PAGE_SIZE);
6713         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6714                                          NULL, res->fs_locations,
6715                                          res->fs_locations->server);
6716 out:
6717         return status;
6718 }
6719
6720 /*
6721  * Decode SECINFO response
6722  */
6723 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6724                                 struct xdr_stream *xdr,
6725                                 struct nfs4_secinfo_res *res)
6726 {
6727         struct compound_hdr hdr;
6728         int status;
6729
6730         status = decode_compound_hdr(xdr, &hdr);
6731         if (status)
6732                 goto out;
6733         status = decode_sequence(xdr, &res->seq_res, rqstp);
6734         if (status)
6735                 goto out;
6736         status = decode_putfh(xdr);
6737         if (status)
6738                 goto out;
6739         status = decode_secinfo(xdr, res);
6740 out:
6741         return status;
6742 }
6743
6744 #if defined(CONFIG_NFS_V4_1)
6745 /*
6746  * Decode BIND_CONN_TO_SESSION response
6747  */
6748 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6749                                         struct xdr_stream *xdr,
6750                                         void *res)
6751 {
6752         struct compound_hdr hdr;
6753         int status;
6754
6755         status = decode_compound_hdr(xdr, &hdr);
6756         if (!status)
6757                 status = decode_bind_conn_to_session(xdr, res);
6758         return status;
6759 }
6760
6761 /*
6762  * Decode EXCHANGE_ID response
6763  */
6764 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6765                                     struct xdr_stream *xdr,
6766                                     void *res)
6767 {
6768         struct compound_hdr hdr;
6769         int status;
6770
6771         status = decode_compound_hdr(xdr, &hdr);
6772         if (!status)
6773                 status = decode_exchange_id(xdr, res);
6774         return status;
6775 }
6776
6777 /*
6778  * Decode CREATE_SESSION response
6779  */
6780 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6781                                        struct xdr_stream *xdr,
6782                                        struct nfs41_create_session_res *res)
6783 {
6784         struct compound_hdr hdr;
6785         int status;
6786
6787         status = decode_compound_hdr(xdr, &hdr);
6788         if (!status)
6789                 status = decode_create_session(xdr, res);
6790         return status;
6791 }
6792
6793 /*
6794  * Decode DESTROY_SESSION response
6795  */
6796 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6797                                         struct xdr_stream *xdr,
6798                                         void *res)
6799 {
6800         struct compound_hdr hdr;
6801         int status;
6802
6803         status = decode_compound_hdr(xdr, &hdr);
6804         if (!status)
6805                 status = decode_destroy_session(xdr, res);
6806         return status;
6807 }
6808
6809 /*
6810  * Decode DESTROY_CLIENTID response
6811  */
6812 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6813                                         struct xdr_stream *xdr,
6814                                         void *res)
6815 {
6816         struct compound_hdr hdr;
6817         int status;
6818
6819         status = decode_compound_hdr(xdr, &hdr);
6820         if (!status)
6821                 status = decode_destroy_clientid(xdr, res);
6822         return status;
6823 }
6824
6825 /*
6826  * Decode SEQUENCE response
6827  */
6828 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6829                                  struct xdr_stream *xdr,
6830                                  struct nfs4_sequence_res *res)
6831 {
6832         struct compound_hdr hdr;
6833         int status;
6834
6835         status = decode_compound_hdr(xdr, &hdr);
6836         if (!status)
6837                 status = decode_sequence(xdr, res, rqstp);
6838         return status;
6839 }
6840
6841 /*
6842  * Decode GET_LEASE_TIME response
6843  */
6844 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6845                                        struct xdr_stream *xdr,
6846                                        struct nfs4_get_lease_time_res *res)
6847 {
6848         struct compound_hdr hdr;
6849         int status;
6850
6851         status = decode_compound_hdr(xdr, &hdr);
6852         if (!status)
6853                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6854         if (!status)
6855                 status = decode_putrootfh(xdr);
6856         if (!status)
6857                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6858         return status;
6859 }
6860
6861 /*
6862  * Decode RECLAIM_COMPLETE response
6863  */
6864 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6865                                          struct xdr_stream *xdr,
6866                                          struct nfs41_reclaim_complete_res *res)
6867 {
6868         struct compound_hdr hdr;
6869         int status;
6870
6871         status = decode_compound_hdr(xdr, &hdr);
6872         if (!status)
6873                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6874         if (!status)
6875                 status = decode_reclaim_complete(xdr, (void *)NULL);
6876         return status;
6877 }
6878
6879 /*
6880  * Decode GETDEVICELIST response
6881  */
6882 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6883                                       struct xdr_stream *xdr,
6884                                       struct nfs4_getdevicelist_res *res)
6885 {
6886         struct compound_hdr hdr;
6887         int status;
6888
6889         dprintk("encoding getdevicelist!\n");
6890
6891         status = decode_compound_hdr(xdr, &hdr);
6892         if (status != 0)
6893                 goto out;
6894         status = decode_sequence(xdr, &res->seq_res, rqstp);
6895         if (status != 0)
6896                 goto out;
6897         status = decode_putfh(xdr);
6898         if (status != 0)
6899                 goto out;
6900         status = decode_getdevicelist(xdr, res->devlist);
6901 out:
6902         return status;
6903 }
6904
6905 /*
6906  * Decode GETDEVINFO response
6907  */
6908 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6909                                       struct xdr_stream *xdr,
6910                                       struct nfs4_getdeviceinfo_res *res)
6911 {
6912         struct compound_hdr hdr;
6913         int status;
6914
6915         status = decode_compound_hdr(xdr, &hdr);
6916         if (status != 0)
6917                 goto out;
6918         status = decode_sequence(xdr, &res->seq_res, rqstp);
6919         if (status != 0)
6920                 goto out;
6921         status = decode_getdeviceinfo(xdr, res->pdev);
6922 out:
6923         return status;
6924 }
6925
6926 /*
6927  * Decode LAYOUTGET response
6928  */
6929 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6930                                   struct xdr_stream *xdr,
6931                                   struct nfs4_layoutget_res *res)
6932 {
6933         struct compound_hdr hdr;
6934         int status;
6935
6936         status = decode_compound_hdr(xdr, &hdr);
6937         if (status)
6938                 goto out;
6939         status = decode_sequence(xdr, &res->seq_res, rqstp);
6940         if (status)
6941                 goto out;
6942         status = decode_putfh(xdr);
6943         if (status)
6944                 goto out;
6945         status = decode_layoutget(xdr, rqstp, res);
6946 out:
6947         return status;
6948 }
6949
6950 /*
6951  * Decode LAYOUTRETURN response
6952  */
6953 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6954                                      struct xdr_stream *xdr,
6955                                      struct nfs4_layoutreturn_res *res)
6956 {
6957         struct compound_hdr hdr;
6958         int status;
6959
6960         status = decode_compound_hdr(xdr, &hdr);
6961         if (status)
6962                 goto out;
6963         status = decode_sequence(xdr, &res->seq_res, rqstp);
6964         if (status)
6965                 goto out;
6966         status = decode_putfh(xdr);
6967         if (status)
6968                 goto out;
6969         status = decode_layoutreturn(xdr, res);
6970 out:
6971         return status;
6972 }
6973
6974 /*
6975  * Decode LAYOUTCOMMIT response
6976  */
6977 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6978                                      struct xdr_stream *xdr,
6979                                      struct nfs4_layoutcommit_res *res)
6980 {
6981         struct compound_hdr hdr;
6982         int status;
6983
6984         status = decode_compound_hdr(xdr, &hdr);
6985         if (status)
6986                 goto out;
6987         status = decode_sequence(xdr, &res->seq_res, rqstp);
6988         if (status)
6989                 goto out;
6990         status = decode_putfh(xdr);
6991         if (status)
6992                 goto out;
6993         status = decode_layoutcommit(xdr, rqstp, res);
6994         if (status)
6995                 goto out;
6996         decode_getfattr(xdr, res->fattr, res->server);
6997 out:
6998         return status;
6999 }
7000
7001 /*
7002  * Decode SECINFO_NO_NAME response
7003  */
7004 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7005                                         struct xdr_stream *xdr,
7006                                         struct nfs4_secinfo_res *res)
7007 {
7008         struct compound_hdr hdr;
7009         int status;
7010
7011         status = decode_compound_hdr(xdr, &hdr);
7012         if (status)
7013                 goto out;
7014         status = decode_sequence(xdr, &res->seq_res, rqstp);
7015         if (status)
7016                 goto out;
7017         status = decode_putrootfh(xdr);
7018         if (status)
7019                 goto out;
7020         status = decode_secinfo_no_name(xdr, res);
7021 out:
7022         return status;
7023 }
7024
7025 /*
7026  * Decode TEST_STATEID response
7027  */
7028 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7029                                      struct xdr_stream *xdr,
7030                                      struct nfs41_test_stateid_res *res)
7031 {
7032         struct compound_hdr hdr;
7033         int status;
7034
7035         status = decode_compound_hdr(xdr, &hdr);
7036         if (status)
7037                 goto out;
7038         status = decode_sequence(xdr, &res->seq_res, rqstp);
7039         if (status)
7040                 goto out;
7041         status = decode_test_stateid(xdr, res);
7042 out:
7043         return status;
7044 }
7045
7046 /*
7047  * Decode FREE_STATEID response
7048  */
7049 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7050                                      struct xdr_stream *xdr,
7051                                      struct nfs41_free_stateid_res *res)
7052 {
7053         struct compound_hdr hdr;
7054         int status;
7055
7056         status = decode_compound_hdr(xdr, &hdr);
7057         if (status)
7058                 goto out;
7059         status = decode_sequence(xdr, &res->seq_res, rqstp);
7060         if (status)
7061                 goto out;
7062         status = decode_free_stateid(xdr, res);
7063 out:
7064         return status;
7065 }
7066 #endif /* CONFIG_NFS_V4_1 */
7067
7068 /**
7069  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7070  *                      the local page cache.
7071  * @xdr: XDR stream where entry resides
7072  * @entry: buffer to fill in with entry data
7073  * @plus: boolean indicating whether this should be a readdirplus entry
7074  *
7075  * Returns zero if successful, otherwise a negative errno value is
7076  * returned.
7077  *
7078  * This function is not invoked during READDIR reply decoding, but
7079  * rather whenever an application invokes the getdents(2) system call
7080  * on a directory already in our cache.
7081  */
7082 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7083                        int plus)
7084 {
7085         unsigned int savep;
7086         uint32_t bitmap[3] = {0};
7087         uint32_t len;
7088         __be32 *p = xdr_inline_decode(xdr, 4);
7089         if (unlikely(!p))
7090                 goto out_overflow;
7091         if (*p == xdr_zero) {
7092                 p = xdr_inline_decode(xdr, 4);
7093                 if (unlikely(!p))
7094                         goto out_overflow;
7095                 if (*p == xdr_zero)
7096                         return -EAGAIN;
7097                 entry->eof = 1;
7098                 return -EBADCOOKIE;
7099         }
7100
7101         p = xdr_inline_decode(xdr, 12);
7102         if (unlikely(!p))
7103                 goto out_overflow;
7104         entry->prev_cookie = entry->cookie;
7105         p = xdr_decode_hyper(p, &entry->cookie);
7106         entry->len = be32_to_cpup(p);
7107
7108         p = xdr_inline_decode(xdr, entry->len);
7109         if (unlikely(!p))
7110                 goto out_overflow;
7111         entry->name = (const char *) p;
7112
7113         /*
7114          * In case the server doesn't return an inode number,
7115          * we fake one here.  (We don't use inode number 0,
7116          * since glibc seems to choke on it...)
7117          */
7118         entry->ino = 1;
7119         entry->fattr->valid = 0;
7120
7121         if (decode_attr_bitmap(xdr, bitmap) < 0)
7122                 goto out_overflow;
7123
7124         if (decode_attr_length(xdr, &len, &savep) < 0)
7125                 goto out_overflow;
7126
7127         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7128                                   NULL, entry->server) < 0)
7129                 goto out_overflow;
7130         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7131                 entry->ino = entry->fattr->mounted_on_fileid;
7132         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7133                 entry->ino = entry->fattr->fileid;
7134
7135         entry->d_type = DT_UNKNOWN;
7136         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7137                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7138
7139         return 0;
7140
7141 out_overflow:
7142         print_overflow_msg(__func__, xdr);
7143         return -EAGAIN;
7144 }
7145
7146 /*
7147  * We need to translate between nfs status return values and
7148  * the local errno values which may not be the same.
7149  */
7150 static struct {
7151         int stat;
7152         int errno;
7153 } nfs_errtbl[] = {
7154         { NFS4_OK,              0               },
7155         { NFS4ERR_PERM,         -EPERM          },
7156         { NFS4ERR_NOENT,        -ENOENT         },
7157         { NFS4ERR_IO,           -errno_NFSERR_IO},
7158         { NFS4ERR_NXIO,         -ENXIO          },
7159         { NFS4ERR_ACCESS,       -EACCES         },
7160         { NFS4ERR_EXIST,        -EEXIST         },
7161         { NFS4ERR_XDEV,         -EXDEV          },
7162         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7163         { NFS4ERR_ISDIR,        -EISDIR         },
7164         { NFS4ERR_INVAL,        -EINVAL         },
7165         { NFS4ERR_FBIG,         -EFBIG          },
7166         { NFS4ERR_NOSPC,        -ENOSPC         },
7167         { NFS4ERR_ROFS,         -EROFS          },
7168         { NFS4ERR_MLINK,        -EMLINK         },
7169         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7170         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7171         { NFS4ERR_DQUOT,        -EDQUOT         },
7172         { NFS4ERR_STALE,        -ESTALE         },
7173         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7174         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7175         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7176         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7177         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7178         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7179         { NFS4ERR_LOCKED,       -EAGAIN         },
7180         { NFS4ERR_SYMLINK,      -ELOOP          },
7181         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7182         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7183         { -1,                   -EIO            }
7184 };
7185
7186 /*
7187  * Convert an NFS error code to a local one.
7188  * This one is used jointly by NFSv2 and NFSv3.
7189  */
7190 static int
7191 nfs4_stat_to_errno(int stat)
7192 {
7193         int i;
7194         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7195                 if (nfs_errtbl[i].stat == stat)
7196                         return nfs_errtbl[i].errno;
7197         }
7198         if (stat <= 10000 || stat > 10100) {
7199                 /* The server is looney tunes. */
7200                 return -EREMOTEIO;
7201         }
7202         /* If we cannot translate the error, the recovery routines should
7203          * handle it.
7204          * Note: remaining NFSv4 error codes have values > 10000, so should
7205          * not conflict with native Linux error codes.
7206          */
7207         return -stat;
7208 }
7209
7210 #define PROC(proc, argtype, restype)                            \
7211 [NFSPROC4_CLNT_##proc] = {                                      \
7212         .p_proc   = NFSPROC4_COMPOUND,                          \
7213         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7214         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7215         .p_arglen = NFS4_##argtype##_sz,                        \
7216         .p_replen = NFS4_##restype##_sz,                        \
7217         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7218         .p_name   = #proc,                                      \
7219 }
7220
7221 struct rpc_procinfo     nfs4_procedures[] = {
7222         PROC(READ,              enc_read,               dec_read),
7223         PROC(WRITE,             enc_write,              dec_write),
7224         PROC(COMMIT,            enc_commit,             dec_commit),
7225         PROC(OPEN,              enc_open,               dec_open),
7226         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7227         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7228         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7229         PROC(CLOSE,             enc_close,              dec_close),
7230         PROC(SETATTR,           enc_setattr,            dec_setattr),
7231         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7232         PROC(RENEW,             enc_renew,              dec_renew),
7233         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7234         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7235         PROC(LOCK,              enc_lock,               dec_lock),
7236         PROC(LOCKT,             enc_lockt,              dec_lockt),
7237         PROC(LOCKU,             enc_locku,              dec_locku),
7238         PROC(ACCESS,            enc_access,             dec_access),
7239         PROC(GETATTR,           enc_getattr,            dec_getattr),
7240         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7241         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7242         PROC(REMOVE,            enc_remove,             dec_remove),
7243         PROC(RENAME,            enc_rename,             dec_rename),
7244         PROC(LINK,              enc_link,               dec_link),
7245         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7246         PROC(CREATE,            enc_create,             dec_create),
7247         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7248         PROC(STATFS,            enc_statfs,             dec_statfs),
7249         PROC(READLINK,          enc_readlink,           dec_readlink),
7250         PROC(READDIR,           enc_readdir,            dec_readdir),
7251         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7252         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7253         PROC(GETACL,            enc_getacl,             dec_getacl),
7254         PROC(SETACL,            enc_setacl,             dec_setacl),
7255         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7256         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7257         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7258 #if defined(CONFIG_NFS_V4_1)
7259         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7260         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7261         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7262         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7263         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7264         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7265         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7266         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7267         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7268         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7269         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7270         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7271         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7272         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7273         PROC(BIND_CONN_TO_SESSION,
7274                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7275         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7276 #endif /* CONFIG_NFS_V4_1 */
7277 };
7278
7279 const struct rpc_version nfs_version4 = {
7280         .number                 = 4,
7281         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7282         .procs                  = nfs4_procedures
7283 };
7284
7285 /*
7286  * Local variables:
7287  *  c-basic-offset: 8
7288  * End:
7289  */