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 const umode_t nfs_type2fmt[] = {
 856         [NF4BAD] = 0,
 857         [NF4REG] = S_IFREG,
 858         [NF4DIR] = S_IFDIR,
 859         [NF4BLK] = S_IFBLK,
 860         [NF4CHR] = S_IFCHR,
 861         [NF4LNK] = S_IFLNK,
 862         [NF4SOCK] = S_IFSOCK,
 863         [NF4FIFO] = S_IFIFO,
 864         [NF4ATTRDIR] = 0,
 865         [NF4NAMEDATTR] = 0,
 866 };
 867
 868 struct compound_hdr {
 869         int32_t         status;
 870         uint32_t        nops;
 871         __be32 *        nops_p;
 872         uint32_t        taglen;
 873         char *          tag;
 874         uint32_t        replen;         /* expected reply words */
 875         u32             minorversion;
 876 };
 877
 878 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 879 {
 880         __be32 *p = xdr_reserve_space(xdr, nbytes);
 881         BUG_ON(!p);
 882         return p;
 883 }
 884
 885 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 886 {
 887         __be32 *p;
 888
 889         p = xdr_reserve_space(xdr, len);
 890         xdr_encode_opaque_fixed(p, buf, len);
 891 }
 892
 893 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 894 {
 895         __be32 *p;
 896
 897         p = reserve_space(xdr, 4 + len);
 898         xdr_encode_opaque(p, str, len);
 899 }
 900
 901 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 902 {
 903         __be32 *p;
 904
 905         p = reserve_space(xdr, 4);
 906         *p = cpu_to_be32(n);
 907 }
 908
 909 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 910 {
 911         __be32 *p;
 912
 913         p = reserve_space(xdr, 8);
 914         xdr_encode_hyper(p, n);
 915 }
 916
 917 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 918                 const struct nfs_seqid *seqid)
 919 {
 920         encode_uint32(xdr, seqid->sequence->counter);
 921 }
 922
 923 static void encode_compound_hdr(struct xdr_stream *xdr,
 924                                 struct rpc_rqst *req,
 925                                 struct compound_hdr *hdr)
 926 {
 927         __be32 *p;
 928         struct rpc_auth *auth = req->rq_cred->cr_auth;
 929
 930         /* initialize running count of expected bytes in reply.
 931          * NOTE: the replied tag SHOULD be the same is the one sent,
 932          * but this is not required as a MUST for the server to do so. */
 933         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 934
 935         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 936         encode_string(xdr, hdr->taglen, hdr->tag);
 937         p = reserve_space(xdr, 8);
 938         *p++ = cpu_to_be32(hdr->minorversion);
 939         hdr->nops_p = p;
 940         *p = cpu_to_be32(hdr->nops);
 941 }
 942
 943 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 944                 uint32_t replen,
 945                 struct compound_hdr *hdr)
 946 {
 947         encode_uint32(xdr, op);
 948         hdr->nops++;
 949         hdr->replen += replen;
 950 }
 951
 952 static void encode_nops(struct compound_hdr *hdr)
 953 {
 954         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 955         *hdr->nops_p = htonl(hdr->nops);
 956 }
 957
 958 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 959 {
 960         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 961 }
 962
 963 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 964 {
 965         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 966 }
 967
 968 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 969 {
 970         char owner_name[IDMAP_NAMESZ];
 971         char owner_group[IDMAP_NAMESZ];
 972         int owner_namelen = 0;
 973         int owner_grouplen = 0;
 974         __be32 *p;
 975         __be32 *q;
 976         int len;
 977         uint32_t bmval0 = 0;
 978         uint32_t bmval1 = 0;
 979
 980         /*
 981          * We reserve enough space to write the entire attribute buffer at once.
 982          * In the worst-case, this would be
 983          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 984          *          = 36 bytes, plus any contribution from variable-length fields
 985          *            such as owner/group.
 986          */
 987         len = 16;
 988
 989         /* Sigh */
 990         if (iap->ia_valid & ATTR_SIZE)
 991                 len += 8;
 992         if (iap->ia_valid & ATTR_MODE)
 993                 len += 4;
 994         if (iap->ia_valid & ATTR_UID) {
 995                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 996                 if (owner_namelen < 0) {
 997                         dprintk("nfs: couldn't resolve uid %d to string\n",
 998                                         iap->ia_uid);
 999                         /* XXX */
1000                         strcpy(owner_name, "nobody");
1001                         owner_namelen = sizeof("nobody") - 1;
1002                         /* goto out; */
1003                 }
1004                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1005         }
1006         if (iap->ia_valid & ATTR_GID) {
1007                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1008                 if (owner_grouplen < 0) {
1009                         dprintk("nfs: couldn't resolve gid %d to string\n",
1010                                         iap->ia_gid);
1011                         strcpy(owner_group, "nobody");
1012                         owner_grouplen = sizeof("nobody") - 1;
1013                         /* goto out; */
1014                 }
1015                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1016         }
1017         if (iap->ia_valid & ATTR_ATIME_SET)
1018                 len += 16;
1019         else if (iap->ia_valid & ATTR_ATIME)
1020                 len += 4;
1021         if (iap->ia_valid & ATTR_MTIME_SET)
1022                 len += 16;
1023         else if (iap->ia_valid & ATTR_MTIME)
1024                 len += 4;
1025         p = reserve_space(xdr, len);
1026
1027         /*
1028          * We write the bitmap length now, but leave the bitmap and the attribute
1029          * buffer length to be backfilled at the end of this routine.
1030          */
1031         *p++ = cpu_to_be32(2);
1032         q = p;
1033         p += 3;
1034
1035         if (iap->ia_valid & ATTR_SIZE) {
1036                 bmval0 |= FATTR4_WORD0_SIZE;
1037                 p = xdr_encode_hyper(p, iap->ia_size);
1038         }
1039         if (iap->ia_valid & ATTR_MODE) {
1040                 bmval1 |= FATTR4_WORD1_MODE;
1041                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1042         }
1043         if (iap->ia_valid & ATTR_UID) {
1044                 bmval1 |= FATTR4_WORD1_OWNER;
1045                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1046         }
1047         if (iap->ia_valid & ATTR_GID) {
1048                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1049                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1050         }
1051         if (iap->ia_valid & ATTR_ATIME_SET) {
1052                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1053                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1054                 *p++ = cpu_to_be32(0);
1055                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1056                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1057         }
1058         else if (iap->ia_valid & ATTR_ATIME) {
1059                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1060                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1061         }
1062         if (iap->ia_valid & ATTR_MTIME_SET) {
1063                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1064                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1065                 *p++ = cpu_to_be32(0);
1066                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1067                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1068         }
1069         else if (iap->ia_valid & ATTR_MTIME) {
1070                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1071                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1072         }
1073
1074         /*
1075          * Now we backfill the bitmap and the attribute buffer length.
1076          */
1077         if (len != ((char *)p - (char *)q) + 4) {
1078                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1079                                 len, ((char *)p - (char *)q) + 4);
1080                 BUG();
1081         }
1082         len = (char *)p - (char *)q - 12;
1083         *q++ = htonl(bmval0);
1084         *q++ = htonl(bmval1);
1085         *q = htonl(len);
1086
1087 /* out: */
1088 }
1089
1090 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1091 {
1092         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1093         encode_uint32(xdr, access);
1094 }
1095
1096 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1097 {
1098         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1099         encode_nfs4_seqid(xdr, arg->seqid);
1100         encode_nfs4_stateid(xdr, arg->stateid);
1101 }
1102
1103 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1104 {
1105         __be32 *p;
1106
1107         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1108         p = reserve_space(xdr, 12);
1109         p = xdr_encode_hyper(p, args->offset);
1110         *p = cpu_to_be32(args->count);
1111 }
1112
1113 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1114 {
1115         __be32 *p;
1116
1117         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1118         encode_uint32(xdr, create->ftype);
1119
1120         switch (create->ftype) {
1121         case NF4LNK:
1122                 p = reserve_space(xdr, 4);
1123                 *p = cpu_to_be32(create->u.symlink.len);
1124                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1125                 break;
1126
1127         case NF4BLK: case NF4CHR:
1128                 p = reserve_space(xdr, 8);
1129                 *p++ = cpu_to_be32(create->u.device.specdata1);
1130                 *p = cpu_to_be32(create->u.device.specdata2);
1131                 break;
1132
1133         default:
1134                 break;
1135         }
1136
1137         encode_string(xdr, create->name->len, create->name->name);
1138         encode_attrs(xdr, create->attrs, create->server);
1139 }
1140
1141 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1142 {
1143         __be32 *p;
1144
1145         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1146         p = reserve_space(xdr, 8);
1147         *p++ = cpu_to_be32(1);
1148         *p = cpu_to_be32(bitmap);
1149 }
1150
1151 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1152 {
1153         __be32 *p;
1154
1155         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1156         p = reserve_space(xdr, 12);
1157         *p++ = cpu_to_be32(2);
1158         *p++ = cpu_to_be32(bm0);
1159         *p = cpu_to_be32(bm1);
1160 }
1161
1162 static void
1163 encode_getattr_three(struct xdr_stream *xdr,
1164                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1165                      struct compound_hdr *hdr)
1166 {
1167         __be32 *p;
1168
1169         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1170         if (bm2) {
1171                 p = reserve_space(xdr, 16);
1172                 *p++ = cpu_to_be32(3);
1173                 *p++ = cpu_to_be32(bm0);
1174                 *p++ = cpu_to_be32(bm1);
1175                 *p = cpu_to_be32(bm2);
1176         } else if (bm1) {
1177                 p = reserve_space(xdr, 12);
1178                 *p++ = cpu_to_be32(2);
1179                 *p++ = cpu_to_be32(bm0);
1180                 *p = cpu_to_be32(bm1);
1181         } else {
1182                 p = reserve_space(xdr, 8);
1183                 *p++ = cpu_to_be32(1);
1184                 *p = cpu_to_be32(bm0);
1185         }
1186 }
1187
1188 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1189 {
1190         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1191                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1192 }
1193
1194 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1195                                  const u32 *open_bitmap,
1196                                  struct compound_hdr *hdr)
1197 {
1198         encode_getattr_three(xdr,
1199                              bitmask[0] & open_bitmap[0],
1200                              bitmask[1] & open_bitmap[1],
1201                              bitmask[2] & open_bitmap[2],
1202                              hdr);
1203 }
1204
1205 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1206 {
1207         encode_getattr_three(xdr,
1208                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1209                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1210                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1211                              hdr);
1212 }
1213
1214 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1215 {
1216         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1217                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1218 }
1219
1220 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1221 {
1222         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1223 }
1224
1225 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1226 {
1227         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1228         encode_string(xdr, name->len, name->name);
1229 }
1230
1231 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1232 {
1233         if (fl->fl_type == F_RDLCK)
1234                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1235         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1236 }
1237
1238 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1239 {
1240         if (fl->fl_end == OFFSET_MAX)
1241                 return ~(uint64_t)0;
1242         return fl->fl_end - fl->fl_start + 1;
1243 }
1244
1245 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1246 {
1247         __be32 *p;
1248
1249         p = reserve_space(xdr, 32);
1250         p = xdr_encode_hyper(p, lowner->clientid);
1251         *p++ = cpu_to_be32(20);
1252         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1253         *p++ = cpu_to_be32(lowner->s_dev);
1254         xdr_encode_hyper(p, lowner->id);
1255 }
1256
1257 /*
1258  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1259  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1260  */
1261 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1262 {
1263         __be32 *p;
1264
1265         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1266         p = reserve_space(xdr, 28);
1267         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1268         *p++ = cpu_to_be32(args->reclaim);
1269         p = xdr_encode_hyper(p, args->fl->fl_start);
1270         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1271         *p = cpu_to_be32(args->new_lock_owner);
1272         if (args->new_lock_owner){
1273                 encode_nfs4_seqid(xdr, args->open_seqid);
1274                 encode_nfs4_stateid(xdr, args->open_stateid);
1275                 encode_nfs4_seqid(xdr, args->lock_seqid);
1276                 encode_lockowner(xdr, &args->lock_owner);
1277         }
1278         else {
1279                 encode_nfs4_stateid(xdr, args->lock_stateid);
1280                 encode_nfs4_seqid(xdr, args->lock_seqid);
1281         }
1282 }
1283
1284 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1285 {
1286         __be32 *p;
1287
1288         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1289         p = reserve_space(xdr, 20);
1290         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1291         p = xdr_encode_hyper(p, args->fl->fl_start);
1292         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1293         encode_lockowner(xdr, &args->lock_owner);
1294 }
1295
1296 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1297 {
1298         __be32 *p;
1299
1300         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1301         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1302         encode_nfs4_seqid(xdr, args->seqid);
1303         encode_nfs4_stateid(xdr, args->stateid);
1304         p = reserve_space(xdr, 16);
1305         p = xdr_encode_hyper(p, args->fl->fl_start);
1306         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1307 }
1308
1309 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1310 {
1311         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1312         encode_lockowner(xdr, lowner);
1313 }
1314
1315 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1316 {
1317         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1318         encode_string(xdr, name->len, name->name);
1319 }
1320
1321 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1322 {
1323         __be32 *p;
1324
1325         p = reserve_space(xdr, 8);
1326         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1327         case FMODE_READ:
1328                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1329                 break;
1330         case FMODE_WRITE:
1331                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1332                 break;
1333         case FMODE_READ|FMODE_WRITE:
1334                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1335                 break;
1336         default:
1337                 *p++ = cpu_to_be32(0);
1338         }
1339         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1340 }
1341
1342 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1343 {
1344         __be32 *p;
1345  /*
1346  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1347  * owner 4 = 32
1348  */
1349         encode_nfs4_seqid(xdr, arg->seqid);
1350         encode_share_access(xdr, arg->fmode);
1351         p = reserve_space(xdr, 36);
1352         p = xdr_encode_hyper(p, arg->clientid);
1353         *p++ = cpu_to_be32(24);
1354         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1355         *p++ = cpu_to_be32(arg->server->s_dev);
1356         *p++ = cpu_to_be32(arg->id.uniquifier);
1357         xdr_encode_hyper(p, arg->id.create_time);
1358 }
1359
1360 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1361 {
1362         __be32 *p;
1363         struct nfs_client *clp;
1364
1365         p = reserve_space(xdr, 4);
1366         switch(arg->open_flags & O_EXCL) {
1367         case 0:
1368                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1369                 encode_attrs(xdr, arg->u.attrs, arg->server);
1370                 break;
1371         default:
1372                 clp = arg->server->nfs_client;
1373                 if (clp->cl_mvops->minor_version > 0) {
1374                         if (nfs4_has_persistent_session(clp)) {
1375                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1376                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1377                         } else {
1378                                 struct iattr dummy;
1379
1380                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1381                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1382                                 dummy.ia_valid = 0;
1383                                 encode_attrs(xdr, &dummy, arg->server);
1384                         }
1385                 } else {
1386                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1387                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1388                 }
1389         }
1390 }
1391
1392 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1393 {
1394         __be32 *p;
1395
1396         p = reserve_space(xdr, 4);
1397         switch (arg->open_flags & O_CREAT) {
1398         case 0:
1399                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1400                 break;
1401         default:
1402                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1403                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1404                 encode_createmode(xdr, arg);
1405         }
1406 }
1407
1408 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1409 {
1410         __be32 *p;
1411
1412         p = reserve_space(xdr, 4);
1413         switch (delegation_type) {
1414         case 0:
1415                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1416                 break;
1417         case FMODE_READ:
1418                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1419                 break;
1420         case FMODE_WRITE|FMODE_READ:
1421                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1422                 break;
1423         default:
1424                 BUG();
1425         }
1426 }
1427
1428 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1429 {
1430         __be32 *p;
1431
1432         p = reserve_space(xdr, 4);
1433         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1434         encode_string(xdr, name->len, name->name);
1435 }
1436
1437 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1438 {
1439         __be32 *p;
1440
1441         p = reserve_space(xdr, 4);
1442         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1443         encode_delegation_type(xdr, type);
1444 }
1445
1446 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1447 {
1448         __be32 *p;
1449
1450         p = reserve_space(xdr, 4);
1451         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1452         encode_nfs4_stateid(xdr, stateid);
1453         encode_string(xdr, name->len, name->name);
1454 }
1455
1456 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1457 {
1458         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1459         encode_openhdr(xdr, arg);
1460         encode_opentype(xdr, arg);
1461         switch (arg->claim) {
1462         case NFS4_OPEN_CLAIM_NULL:
1463                 encode_claim_null(xdr, arg->name);
1464                 break;
1465         case NFS4_OPEN_CLAIM_PREVIOUS:
1466                 encode_claim_previous(xdr, arg->u.delegation_type);
1467                 break;
1468         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1469                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1470                 break;
1471         default:
1472                 BUG();
1473         }
1474 }
1475
1476 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1477 {
1478         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1479         encode_nfs4_stateid(xdr, arg->stateid);
1480         encode_nfs4_seqid(xdr, arg->seqid);
1481 }
1482
1483 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1484 {
1485         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1486         encode_nfs4_stateid(xdr, arg->stateid);
1487         encode_nfs4_seqid(xdr, arg->seqid);
1488         encode_share_access(xdr, arg->fmode);
1489 }
1490
1491 static void
1492 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1493 {
1494         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1495         encode_string(xdr, fh->size, fh->data);
1496 }
1497
1498 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1499 {
1500         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1501 }
1502
1503 static void encode_open_stateid(struct xdr_stream *xdr,
1504                 const struct nfs_open_context *ctx,
1505                 const struct nfs_lock_context *l_ctx,
1506                 fmode_t fmode,
1507                 int zero_seqid)
1508 {
1509         nfs4_stateid stateid;
1510
1511         if (ctx->state != NULL) {
1512                 nfs4_select_rw_stateid(&stateid, ctx->state,
1513                                 fmode, l_ctx->lockowner, l_ctx->pid);
1514                 if (zero_seqid)
1515                         stateid.seqid = 0;
1516                 encode_nfs4_stateid(xdr, &stateid);
1517         } else
1518                 encode_nfs4_stateid(xdr, &zero_stateid);
1519 }
1520
1521 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1522 {
1523         __be32 *p;
1524
1525         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1526         encode_open_stateid(xdr, args->context, args->lock_context,
1527                         FMODE_READ, hdr->minorversion);
1528
1529         p = reserve_space(xdr, 12);
1530         p = xdr_encode_hyper(p, args->offset);
1531         *p = cpu_to_be32(args->count);
1532 }
1533
1534 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1535 {
1536         uint32_t attrs[2] = {
1537                 FATTR4_WORD0_RDATTR_ERROR,
1538                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1539         };
1540         uint32_t dircount = readdir->count >> 1;
1541         __be32 *p, verf[2];
1542
1543         if (readdir->plus) {
1544                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1545                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1546                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1547                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1548                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1549                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1550                 dircount >>= 1;
1551         }
1552         /* Use mounted_on_fileid only if the server supports it */
1553         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1554                 attrs[0] |= FATTR4_WORD0_FILEID;
1555
1556         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1557         encode_uint64(xdr, readdir->cookie);
1558         encode_nfs4_verifier(xdr, &readdir->verifier);
1559         p = reserve_space(xdr, 20);
1560         *p++ = cpu_to_be32(dircount);
1561         *p++ = cpu_to_be32(readdir->count);
1562         *p++ = cpu_to_be32(2);
1563
1564         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1565         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1566         memcpy(verf, readdir->verifier.data, sizeof(verf));
1567         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1568                         __func__,
1569                         (unsigned long long)readdir->cookie,
1570                         verf[0], verf[1],
1571                         attrs[0] & readdir->bitmask[0],
1572                         attrs[1] & readdir->bitmask[1]);
1573 }
1574
1575 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1576 {
1577         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1578 }
1579
1580 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1581 {
1582         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1583         encode_string(xdr, name->len, name->name);
1584 }
1585
1586 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1587 {
1588         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1589         encode_string(xdr, oldname->len, oldname->name);
1590         encode_string(xdr, newname->len, newname->name);
1591 }
1592
1593 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1594                          struct compound_hdr *hdr)
1595 {
1596         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1597         encode_uint64(xdr, clid);
1598 }
1599
1600 static void
1601 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1602 {
1603         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1604 }
1605
1606 static void
1607 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1608 {
1609         __be32 *p;
1610
1611         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1612         encode_nfs4_stateid(xdr, &zero_stateid);
1613         p = reserve_space(xdr, 2*4);
1614         *p++ = cpu_to_be32(1);
1615         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1616         BUG_ON(arg->acl_len % 4);
1617         p = reserve_space(xdr, 4);
1618         *p = cpu_to_be32(arg->acl_len);
1619         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1620 }
1621
1622 static void
1623 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1624 {
1625         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1626 }
1627
1628 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1629 {
1630         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1631         encode_nfs4_stateid(xdr, &arg->stateid);
1632         encode_attrs(xdr, arg->iap, server);
1633 }
1634
1635 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1636 {
1637         __be32 *p;
1638
1639         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1640         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1641
1642         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1643         p = reserve_space(xdr, 4);
1644         *p = cpu_to_be32(setclientid->sc_prog);
1645         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1646         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1647         p = reserve_space(xdr, 4);
1648         *p = cpu_to_be32(setclientid->sc_cb_ident);
1649 }
1650
1651 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1652 {
1653         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1654                         decode_setclientid_confirm_maxsz, hdr);
1655         encode_uint64(xdr, arg->clientid);
1656         encode_nfs4_verifier(xdr, &arg->confirm);
1657 }
1658
1659 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1660 {
1661         __be32 *p;
1662
1663         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1664         encode_open_stateid(xdr, args->context, args->lock_context,
1665                         FMODE_WRITE, hdr->minorversion);
1666
1667         p = reserve_space(xdr, 16);
1668         p = xdr_encode_hyper(p, args->offset);
1669         *p++ = cpu_to_be32(args->stable);
1670         *p = cpu_to_be32(args->count);
1671
1672         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1673 }
1674
1675 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1676 {
1677         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1678         encode_nfs4_stateid(xdr, stateid);
1679 }
1680
1681 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1682 {
1683         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1684         encode_string(xdr, name->len, name->name);
1685 }
1686
1687 #if defined(CONFIG_NFS_V4_1)
1688 /* NFSv4.1 operations */
1689 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1690                                    struct nfs4_session *session,
1691                                    struct compound_hdr *hdr)
1692 {
1693         __be32 *p;
1694
1695         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1696                 decode_bind_conn_to_session_maxsz, hdr);
1697         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1698         p = xdr_reserve_space(xdr, 8);
1699         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1700         *p = 0; /* use_conn_in_rdma_mode = False */
1701 }
1702
1703 static void encode_exchange_id(struct xdr_stream *xdr,
1704                                struct nfs41_exchange_id_args *args,
1705                                struct compound_hdr *hdr)
1706 {
1707         __be32 *p;
1708         char impl_name[NFS4_OPAQUE_LIMIT];
1709         int len = 0;
1710
1711         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1712         encode_nfs4_verifier(xdr, args->verifier);
1713
1714         encode_string(xdr, args->id_len, args->id);
1715
1716         p = reserve_space(xdr, 12);
1717         *p++ = cpu_to_be32(args->flags);
1718         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1719
1720         if (send_implementation_id &&
1721             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1722             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1723                 <= NFS4_OPAQUE_LIMIT + 1)
1724                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1725                                utsname()->sysname, utsname()->release,
1726                                utsname()->version, utsname()->machine);
1727
1728         if (len > 0) {
1729                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1730
1731                 encode_string(xdr,
1732                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1733                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1734                 encode_string(xdr, len, impl_name);
1735                 /* just send zeros for nii_date - the date is in nii_name */
1736                 p = reserve_space(xdr, 12);
1737                 p = xdr_encode_hyper(p, 0);
1738                 *p = cpu_to_be32(0);
1739         } else
1740                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1741 }
1742
1743 static void encode_create_session(struct xdr_stream *xdr,
1744                                   struct nfs41_create_session_args *args,
1745                                   struct compound_hdr *hdr)
1746 {
1747         __be32 *p;
1748         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1749         uint32_t len;
1750         struct nfs_client *clp = args->client;
1751         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1752         u32 max_resp_sz_cached;
1753
1754         /*
1755          * Assumes OPEN is the biggest non-idempotent compound.
1756          * 2 is the verifier.
1757          */
1758         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1759                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1760
1761         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1762                         clp->cl_ipaddr);
1763
1764         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1765         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1766         p = xdr_encode_hyper(p, clp->cl_clientid);
1767         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1768         *p++ = cpu_to_be32(args->flags);                        /*flags */
1769
1770         /* Fore Channel */
1771         *p++ = cpu_to_be32(0);                          /* header padding size */
1772         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1773         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1774         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1775         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1776         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1777         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1778
1779         /* Back Channel */
1780         *p++ = cpu_to_be32(0);                          /* header padding size */
1781         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1782         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1783         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1784         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1785         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1786         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1787
1788         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1789         *p++ = cpu_to_be32(1);
1790         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1791
1792         /* authsys_parms rfc1831 */
1793         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1794         p = xdr_encode_opaque(p, machine_name, len);
1795         *p++ = cpu_to_be32(0);                          /* UID */
1796         *p++ = cpu_to_be32(0);                          /* GID */
1797         *p = cpu_to_be32(0);                            /* No more gids */
1798 }
1799
1800 static void encode_destroy_session(struct xdr_stream *xdr,
1801                                    struct nfs4_session *session,
1802                                    struct compound_hdr *hdr)
1803 {
1804         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1805         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1806 }
1807
1808 static void encode_destroy_clientid(struct xdr_stream *xdr,
1809                                    uint64_t clientid,
1810                                    struct compound_hdr *hdr)
1811 {
1812         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1813         encode_uint64(xdr, clientid);
1814 }
1815
1816 static void encode_reclaim_complete(struct xdr_stream *xdr,
1817                                     struct nfs41_reclaim_complete_args *args,
1818                                     struct compound_hdr *hdr)
1819 {
1820         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1821         encode_uint32(xdr, args->one_fs);
1822 }
1823 #endif /* CONFIG_NFS_V4_1 */
1824
1825 static void encode_sequence(struct xdr_stream *xdr,
1826                             const struct nfs4_sequence_args *args,
1827                             struct compound_hdr *hdr)
1828 {
1829 #if defined(CONFIG_NFS_V4_1)
1830         struct nfs4_session *session = args->sa_session;
1831         struct nfs4_slot_table *tp;
1832         struct nfs4_slot *slot;
1833         __be32 *p;
1834
1835         if (!session)
1836                 return;
1837
1838         tp = &session->fc_slot_table;
1839
1840         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1841         slot = tp->slots + args->sa_slotid;
1842
1843         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1844
1845         /*
1846          * Sessionid + seqid + slotid + max slotid + cache_this
1847          */
1848         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1849                 "max_slotid=%d cache_this=%d\n",
1850                 __func__,
1851                 ((u32 *)session->sess_id.data)[0],
1852                 ((u32 *)session->sess_id.data)[1],
1853                 ((u32 *)session->sess_id.data)[2],
1854                 ((u32 *)session->sess_id.data)[3],
1855                 slot->seq_nr, args->sa_slotid,
1856                 tp->highest_used_slotid, args->sa_cache_this);
1857         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1858         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1859         *p++ = cpu_to_be32(slot->seq_nr);
1860         *p++ = cpu_to_be32(args->sa_slotid);
1861         *p++ = cpu_to_be32(tp->highest_used_slotid);
1862         *p = cpu_to_be32(args->sa_cache_this);
1863 #endif /* CONFIG_NFS_V4_1 */
1864 }
1865
1866 #ifdef CONFIG_NFS_V4_1
1867 static void
1868 encode_getdevicelist(struct xdr_stream *xdr,
1869                      const struct nfs4_getdevicelist_args *args,
1870                      struct compound_hdr *hdr)
1871 {
1872         __be32 *p;
1873         nfs4_verifier dummy = {
1874                 .data = "dummmmmy",
1875         };
1876
1877         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1878         p = reserve_space(xdr, 16);
1879         *p++ = cpu_to_be32(args->layoutclass);
1880         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1881         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1882         encode_nfs4_verifier(xdr, &dummy);
1883 }
1884
1885 static void
1886 encode_getdeviceinfo(struct xdr_stream *xdr,
1887                      const struct nfs4_getdeviceinfo_args *args,
1888                      struct compound_hdr *hdr)
1889 {
1890         __be32 *p;
1891
1892         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1893         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1894         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1895                                     NFS4_DEVICEID4_SIZE);
1896         *p++ = cpu_to_be32(args->pdev->layout_type);
1897         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1898         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1899 }
1900
1901 static void
1902 encode_layoutget(struct xdr_stream *xdr,
1903                       const struct nfs4_layoutget_args *args,
1904                       struct compound_hdr *hdr)
1905 {
1906         __be32 *p;
1907
1908         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1909         p = reserve_space(xdr, 36);
1910         *p++ = cpu_to_be32(0);     /* Signal layout available */
1911         *p++ = cpu_to_be32(args->type);
1912         *p++ = cpu_to_be32(args->range.iomode);
1913         p = xdr_encode_hyper(p, args->range.offset);
1914         p = xdr_encode_hyper(p, args->range.length);
1915         p = xdr_encode_hyper(p, args->minlength);
1916         encode_nfs4_stateid(xdr, &args->stateid);
1917         encode_uint32(xdr, args->maxcount);
1918
1919         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1920                 __func__,
1921                 args->type,
1922                 args->range.iomode,
1923                 (unsigned long)args->range.offset,
1924                 (unsigned long)args->range.length,
1925                 args->maxcount);
1926 }
1927
1928 static int
1929 encode_layoutcommit(struct xdr_stream *xdr,
1930                     struct inode *inode,
1931                     const struct nfs4_layoutcommit_args *args,
1932                     struct compound_hdr *hdr)
1933 {
1934         __be32 *p;
1935
1936         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1937                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1938
1939         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1940         p = reserve_space(xdr, 20);
1941         /* Only whole file layouts */
1942         p = xdr_encode_hyper(p, 0); /* offset */
1943         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1944         *p = cpu_to_be32(0); /* reclaim */
1945         encode_nfs4_stateid(xdr, &args->stateid);
1946         p = reserve_space(xdr, 20);
1947         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1948         p = xdr_encode_hyper(p, args->lastbytewritten);
1949         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1950         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1951
1952         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1953                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1954                         NFS_I(inode)->layout, xdr, args);
1955         else
1956                 encode_uint32(xdr, 0); /* no layout-type payload */
1957
1958         return 0;
1959 }
1960
1961 static void
1962 encode_layoutreturn(struct xdr_stream *xdr,
1963                     const struct nfs4_layoutreturn_args *args,
1964                     struct compound_hdr *hdr)
1965 {
1966         __be32 *p;
1967
1968         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1969         p = reserve_space(xdr, 16);
1970         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1971         *p++ = cpu_to_be32(args->layout_type);
1972         *p++ = cpu_to_be32(IOMODE_ANY);
1973         *p = cpu_to_be32(RETURN_FILE);
1974         p = reserve_space(xdr, 16);
1975         p = xdr_encode_hyper(p, 0);
1976         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1977         spin_lock(&args->inode->i_lock);
1978         encode_nfs4_stateid(xdr, &args->stateid);
1979         spin_unlock(&args->inode->i_lock);
1980         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1981                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1982                         NFS_I(args->inode)->layout, xdr, args);
1983         } else
1984                 encode_uint32(xdr, 0);
1985 }
1986
1987 static int
1988 encode_secinfo_no_name(struct xdr_stream *xdr,
1989                        const struct nfs41_secinfo_no_name_args *args,
1990                        struct compound_hdr *hdr)
1991 {
1992         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1993         encode_uint32(xdr, args->style);
1994         return 0;
1995 }
1996
1997 static void encode_test_stateid(struct xdr_stream *xdr,
1998                                 struct nfs41_test_stateid_args *args,
1999                                 struct compound_hdr *hdr)
2000 {
2001         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2002         encode_uint32(xdr, 1);
2003         encode_nfs4_stateid(xdr, args->stateid);
2004 }
2005
2006 static void encode_free_stateid(struct xdr_stream *xdr,
2007                                 struct nfs41_free_stateid_args *args,
2008                                 struct compound_hdr *hdr)
2009 {
2010         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2011         encode_nfs4_stateid(xdr, args->stateid);
2012 }
2013 #endif /* CONFIG_NFS_V4_1 */
2014
2015 /*
2016  * END OF "GENERIC" ENCODE ROUTINES.
2017  */
2018
2019 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2020 {
2021 #if defined(CONFIG_NFS_V4_1)
2022         if (args->sa_session)
2023                 return args->sa_session->clp->cl_mvops->minor_version;
2024 #endif /* CONFIG_NFS_V4_1 */
2025         return 0;
2026 }
2027
2028 /*
2029  * Encode an ACCESS request
2030  */
2031 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2032                                 const struct nfs4_accessargs *args)
2033 {
2034         struct compound_hdr hdr = {
2035                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2036         };
2037
2038         encode_compound_hdr(xdr, req, &hdr);
2039         encode_sequence(xdr, &args->seq_args, &hdr);
2040         encode_putfh(xdr, args->fh, &hdr);
2041         encode_access(xdr, args->access, &hdr);
2042         encode_getfattr(xdr, args->bitmask, &hdr);
2043         encode_nops(&hdr);
2044 }
2045
2046 /*
2047  * Encode LOOKUP request
2048  */
2049 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2050                                 const struct nfs4_lookup_arg *args)
2051 {
2052         struct compound_hdr hdr = {
2053                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2054         };
2055
2056         encode_compound_hdr(xdr, req, &hdr);
2057         encode_sequence(xdr, &args->seq_args, &hdr);
2058         encode_putfh(xdr, args->dir_fh, &hdr);
2059         encode_lookup(xdr, args->name, &hdr);
2060         encode_getfh(xdr, &hdr);
2061         encode_getfattr(xdr, args->bitmask, &hdr);
2062         encode_nops(&hdr);
2063 }
2064
2065 /*
2066  * Encode LOOKUP_ROOT request
2067  */
2068 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2069                                      struct xdr_stream *xdr,
2070                                      const struct nfs4_lookup_root_arg *args)
2071 {
2072         struct compound_hdr hdr = {
2073                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2074         };
2075
2076         encode_compound_hdr(xdr, req, &hdr);
2077         encode_sequence(xdr, &args->seq_args, &hdr);
2078         encode_putrootfh(xdr, &hdr);
2079         encode_getfh(xdr, &hdr);
2080         encode_getfattr(xdr, args->bitmask, &hdr);
2081         encode_nops(&hdr);
2082 }
2083
2084 /*
2085  * Encode REMOVE request
2086  */
2087 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2088                                 const struct nfs_removeargs *args)
2089 {
2090         struct compound_hdr hdr = {
2091                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2092         };
2093
2094         encode_compound_hdr(xdr, req, &hdr);
2095         encode_sequence(xdr, &args->seq_args, &hdr);
2096         encode_putfh(xdr, args->fh, &hdr);
2097         encode_remove(xdr, &args->name, &hdr);
2098         encode_nops(&hdr);
2099 }
2100
2101 /*
2102  * Encode RENAME request
2103  */
2104 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2105                                 const struct nfs_renameargs *args)
2106 {
2107         struct compound_hdr hdr = {
2108                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2109         };
2110
2111         encode_compound_hdr(xdr, req, &hdr);
2112         encode_sequence(xdr, &args->seq_args, &hdr);
2113         encode_putfh(xdr, args->old_dir, &hdr);
2114         encode_savefh(xdr, &hdr);
2115         encode_putfh(xdr, args->new_dir, &hdr);
2116         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2117         encode_nops(&hdr);
2118 }
2119
2120 /*
2121  * Encode LINK request
2122  */
2123 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2124                              const struct nfs4_link_arg *args)
2125 {
2126         struct compound_hdr hdr = {
2127                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2128         };
2129
2130         encode_compound_hdr(xdr, req, &hdr);
2131         encode_sequence(xdr, &args->seq_args, &hdr);
2132         encode_putfh(xdr, args->fh, &hdr);
2133         encode_savefh(xdr, &hdr);
2134         encode_putfh(xdr, args->dir_fh, &hdr);
2135         encode_link(xdr, args->name, &hdr);
2136         encode_restorefh(xdr, &hdr);
2137         encode_getfattr(xdr, args->bitmask, &hdr);
2138         encode_nops(&hdr);
2139 }
2140
2141 /*
2142  * Encode CREATE request
2143  */
2144 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2145                                 const struct nfs4_create_arg *args)
2146 {
2147         struct compound_hdr hdr = {
2148                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2149         };
2150
2151         encode_compound_hdr(xdr, req, &hdr);
2152         encode_sequence(xdr, &args->seq_args, &hdr);
2153         encode_putfh(xdr, args->dir_fh, &hdr);
2154         encode_create(xdr, args, &hdr);
2155         encode_getfh(xdr, &hdr);
2156         encode_getfattr(xdr, args->bitmask, &hdr);
2157         encode_nops(&hdr);
2158 }
2159
2160 /*
2161  * Encode SYMLINK request
2162  */
2163 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2164                                  const struct nfs4_create_arg *args)
2165 {
2166         nfs4_xdr_enc_create(req, xdr, args);
2167 }
2168
2169 /*
2170  * Encode GETATTR request
2171  */
2172 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2173                                  const struct nfs4_getattr_arg *args)
2174 {
2175         struct compound_hdr hdr = {
2176                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2177         };
2178
2179         encode_compound_hdr(xdr, req, &hdr);
2180         encode_sequence(xdr, &args->seq_args, &hdr);
2181         encode_putfh(xdr, args->fh, &hdr);
2182         encode_getfattr(xdr, args->bitmask, &hdr);
2183         encode_nops(&hdr);
2184 }
2185
2186 /*
2187  * Encode a CLOSE request
2188  */
2189 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2190                                struct nfs_closeargs *args)
2191 {
2192         struct compound_hdr hdr = {
2193                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2194         };
2195
2196         encode_compound_hdr(xdr, req, &hdr);
2197         encode_sequence(xdr, &args->seq_args, &hdr);
2198         encode_putfh(xdr, args->fh, &hdr);
2199         encode_close(xdr, args, &hdr);
2200         encode_getfattr(xdr, args->bitmask, &hdr);
2201         encode_nops(&hdr);
2202 }
2203
2204 /*
2205  * Encode an OPEN request
2206  */
2207 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2208                               struct nfs_openargs *args)
2209 {
2210         struct compound_hdr hdr = {
2211                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2212         };
2213
2214         encode_compound_hdr(xdr, req, &hdr);
2215         encode_sequence(xdr, &args->seq_args, &hdr);
2216         encode_putfh(xdr, args->fh, &hdr);
2217         encode_open(xdr, args, &hdr);
2218         encode_getfh(xdr, &hdr);
2219         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2220         encode_nops(&hdr);
2221 }
2222
2223 /*
2224  * Encode an OPEN_CONFIRM request
2225  */
2226 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2227                                       struct xdr_stream *xdr,
2228                                       struct nfs_open_confirmargs *args)
2229 {
2230         struct compound_hdr hdr = {
2231                 .nops   = 0,
2232         };
2233
2234         encode_compound_hdr(xdr, req, &hdr);
2235         encode_putfh(xdr, args->fh, &hdr);
2236         encode_open_confirm(xdr, args, &hdr);
2237         encode_nops(&hdr);
2238 }
2239
2240 /*
2241  * Encode an OPEN request with no attributes.
2242  */
2243 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2244                                      struct xdr_stream *xdr,
2245                                      struct nfs_openargs *args)
2246 {
2247         struct compound_hdr hdr = {
2248                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2249         };
2250
2251         encode_compound_hdr(xdr, req, &hdr);
2252         encode_sequence(xdr, &args->seq_args, &hdr);
2253         encode_putfh(xdr, args->fh, &hdr);
2254         encode_open(xdr, args, &hdr);
2255         encode_getfattr(xdr, args->bitmask, &hdr);
2256         encode_nops(&hdr);
2257 }
2258
2259 /*
2260  * Encode an OPEN_DOWNGRADE request
2261  */
2262 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2263                                         struct xdr_stream *xdr,
2264                                         struct nfs_closeargs *args)
2265 {
2266         struct compound_hdr hdr = {
2267                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2268         };
2269
2270         encode_compound_hdr(xdr, req, &hdr);
2271         encode_sequence(xdr, &args->seq_args, &hdr);
2272         encode_putfh(xdr, args->fh, &hdr);
2273         encode_open_downgrade(xdr, args, &hdr);
2274         encode_getfattr(xdr, args->bitmask, &hdr);
2275         encode_nops(&hdr);
2276 }
2277
2278 /*
2279  * Encode a LOCK request
2280  */
2281 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2282                               struct nfs_lock_args *args)
2283 {
2284         struct compound_hdr hdr = {
2285                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2286         };
2287
2288         encode_compound_hdr(xdr, req, &hdr);
2289         encode_sequence(xdr, &args->seq_args, &hdr);
2290         encode_putfh(xdr, args->fh, &hdr);
2291         encode_lock(xdr, args, &hdr);
2292         encode_nops(&hdr);
2293 }
2294
2295 /*
2296  * Encode a LOCKT request
2297  */
2298 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2299                                struct nfs_lockt_args *args)
2300 {
2301         struct compound_hdr hdr = {
2302                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2303         };
2304
2305         encode_compound_hdr(xdr, req, &hdr);
2306         encode_sequence(xdr, &args->seq_args, &hdr);
2307         encode_putfh(xdr, args->fh, &hdr);
2308         encode_lockt(xdr, args, &hdr);
2309         encode_nops(&hdr);
2310 }
2311
2312 /*
2313  * Encode a LOCKU request
2314  */
2315 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2316                                struct nfs_locku_args *args)
2317 {
2318         struct compound_hdr hdr = {
2319                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2320         };
2321
2322         encode_compound_hdr(xdr, req, &hdr);
2323         encode_sequence(xdr, &args->seq_args, &hdr);
2324         encode_putfh(xdr, args->fh, &hdr);
2325         encode_locku(xdr, args, &hdr);
2326         encode_nops(&hdr);
2327 }
2328
2329 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2330                                            struct xdr_stream *xdr,
2331                                         struct nfs_release_lockowner_args *args)
2332 {
2333         struct compound_hdr hdr = {
2334                 .minorversion = 0,
2335         };
2336
2337         encode_compound_hdr(xdr, req, &hdr);
2338         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2339         encode_nops(&hdr);
2340 }
2341
2342 /*
2343  * Encode a READLINK request
2344  */
2345 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2346                                   const struct nfs4_readlink *args)
2347 {
2348         struct compound_hdr hdr = {
2349                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2350         };
2351
2352         encode_compound_hdr(xdr, req, &hdr);
2353         encode_sequence(xdr, &args->seq_args, &hdr);
2354         encode_putfh(xdr, args->fh, &hdr);
2355         encode_readlink(xdr, args, req, &hdr);
2356
2357         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2358                         args->pgbase, args->pglen);
2359         encode_nops(&hdr);
2360 }
2361
2362 /*
2363  * Encode a READDIR request
2364  */
2365 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2366                                  const struct nfs4_readdir_arg *args)
2367 {
2368         struct compound_hdr hdr = {
2369                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2370         };
2371
2372         encode_compound_hdr(xdr, req, &hdr);
2373         encode_sequence(xdr, &args->seq_args, &hdr);
2374         encode_putfh(xdr, args->fh, &hdr);
2375         encode_readdir(xdr, args, req, &hdr);
2376
2377         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2378                          args->pgbase, args->count);
2379         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2380                         __func__, hdr.replen << 2, args->pages,
2381                         args->pgbase, args->count);
2382         encode_nops(&hdr);
2383 }
2384
2385 /*
2386  * Encode a READ request
2387  */
2388 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2389                               struct nfs_readargs *args)
2390 {
2391         struct compound_hdr hdr = {
2392                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2393         };
2394
2395         encode_compound_hdr(xdr, req, &hdr);
2396         encode_sequence(xdr, &args->seq_args, &hdr);
2397         encode_putfh(xdr, args->fh, &hdr);
2398         encode_read(xdr, args, &hdr);
2399
2400         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2401                          args->pages, args->pgbase, args->count);
2402         req->rq_rcv_buf.flags |= XDRBUF_READ;
2403         encode_nops(&hdr);
2404 }
2405
2406 /*
2407  * Encode an SETATTR request
2408  */
2409 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2410                                  struct nfs_setattrargs *args)
2411 {
2412         struct compound_hdr hdr = {
2413                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2414         };
2415
2416         encode_compound_hdr(xdr, req, &hdr);
2417         encode_sequence(xdr, &args->seq_args, &hdr);
2418         encode_putfh(xdr, args->fh, &hdr);
2419         encode_setattr(xdr, args, args->server, &hdr);
2420         encode_getfattr(xdr, args->bitmask, &hdr);
2421         encode_nops(&hdr);
2422 }
2423
2424 /*
2425  * Encode a GETACL request
2426  */
2427 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2428                                 struct nfs_getaclargs *args)
2429 {
2430         struct compound_hdr hdr = {
2431                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2432         };
2433         uint32_t replen;
2434
2435         encode_compound_hdr(xdr, req, &hdr);
2436         encode_sequence(xdr, &args->seq_args, &hdr);
2437         encode_putfh(xdr, args->fh, &hdr);
2438         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2439         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2440
2441         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2442                 args->acl_pages, args->acl_pgbase, args->acl_len);
2443
2444         encode_nops(&hdr);
2445 }
2446
2447 /*
2448  * Encode a WRITE request
2449  */
2450 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2451                                struct nfs_writeargs *args)
2452 {
2453         struct compound_hdr hdr = {
2454                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2455         };
2456
2457         encode_compound_hdr(xdr, req, &hdr);
2458         encode_sequence(xdr, &args->seq_args, &hdr);
2459         encode_putfh(xdr, args->fh, &hdr);
2460         encode_write(xdr, args, &hdr);
2461         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2462         if (args->bitmask)
2463                 encode_getfattr(xdr, args->bitmask, &hdr);
2464         encode_nops(&hdr);
2465 }
2466
2467 /*
2468  *  a COMMIT request
2469  */
2470 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2471                                 struct nfs_commitargs *args)
2472 {
2473         struct compound_hdr hdr = {
2474                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475         };
2476
2477         encode_compound_hdr(xdr, req, &hdr);
2478         encode_sequence(xdr, &args->seq_args, &hdr);
2479         encode_putfh(xdr, args->fh, &hdr);
2480         encode_commit(xdr, args, &hdr);
2481         encode_nops(&hdr);
2482 }
2483
2484 /*
2485  * FSINFO request
2486  */
2487 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2488                                 struct nfs4_fsinfo_arg *args)
2489 {
2490         struct compound_hdr hdr = {
2491                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2492         };
2493
2494         encode_compound_hdr(xdr, req, &hdr);
2495         encode_sequence(xdr, &args->seq_args, &hdr);
2496         encode_putfh(xdr, args->fh, &hdr);
2497         encode_fsinfo(xdr, args->bitmask, &hdr);
2498         encode_nops(&hdr);
2499 }
2500
2501 /*
2502  * a PATHCONF request
2503  */
2504 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2505                                   const struct nfs4_pathconf_arg *args)
2506 {
2507         struct compound_hdr hdr = {
2508                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2509         };
2510
2511         encode_compound_hdr(xdr, req, &hdr);
2512         encode_sequence(xdr, &args->seq_args, &hdr);
2513         encode_putfh(xdr, args->fh, &hdr);
2514         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2515                            &hdr);
2516         encode_nops(&hdr);
2517 }
2518
2519 /*
2520  * a STATFS request
2521  */
2522 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2523                                 const struct nfs4_statfs_arg *args)
2524 {
2525         struct compound_hdr hdr = {
2526                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527         };
2528
2529         encode_compound_hdr(xdr, req, &hdr);
2530         encode_sequence(xdr, &args->seq_args, &hdr);
2531         encode_putfh(xdr, args->fh, &hdr);
2532         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2533                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2534         encode_nops(&hdr);
2535 }
2536
2537 /*
2538  * GETATTR_BITMAP request
2539  */
2540 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2541                                      struct xdr_stream *xdr,
2542                                      struct nfs4_server_caps_arg *args)
2543 {
2544         struct compound_hdr hdr = {
2545                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2546         };
2547
2548         encode_compound_hdr(xdr, req, &hdr);
2549         encode_sequence(xdr, &args->seq_args, &hdr);
2550         encode_putfh(xdr, args->fhandle, &hdr);
2551         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2552                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2553                            FATTR4_WORD0_LINK_SUPPORT|
2554                            FATTR4_WORD0_SYMLINK_SUPPORT|
2555                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2556         encode_nops(&hdr);
2557 }
2558
2559 /*
2560  * a RENEW request
2561  */
2562 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2563                                struct nfs_client *clp)
2564 {
2565         struct compound_hdr hdr = {
2566                 .nops   = 0,
2567         };
2568
2569         encode_compound_hdr(xdr, req, &hdr);
2570         encode_renew(xdr, clp->cl_clientid, &hdr);
2571         encode_nops(&hdr);
2572 }
2573
2574 /*
2575  * a SETCLIENTID request
2576  */
2577 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2578                                      struct xdr_stream *xdr,
2579                                      struct nfs4_setclientid *sc)
2580 {
2581         struct compound_hdr hdr = {
2582                 .nops   = 0,
2583         };
2584
2585         encode_compound_hdr(xdr, req, &hdr);
2586         encode_setclientid(xdr, sc, &hdr);
2587         encode_nops(&hdr);
2588 }
2589
2590 /*
2591  * a SETCLIENTID_CONFIRM request
2592  */
2593 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2594                                              struct xdr_stream *xdr,
2595                                              struct nfs4_setclientid_res *arg)
2596 {
2597         struct compound_hdr hdr = {
2598                 .nops   = 0,
2599         };
2600         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2601
2602         encode_compound_hdr(xdr, req, &hdr);
2603         encode_setclientid_confirm(xdr, arg, &hdr);
2604         encode_putrootfh(xdr, &hdr);
2605         encode_fsinfo(xdr, lease_bitmap, &hdr);
2606         encode_nops(&hdr);
2607 }
2608
2609 /*
2610  * DELEGRETURN request
2611  */
2612 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2613                                      struct xdr_stream *xdr,
2614                                      const struct nfs4_delegreturnargs *args)
2615 {
2616         struct compound_hdr hdr = {
2617                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2618         };
2619
2620         encode_compound_hdr(xdr, req, &hdr);
2621         encode_sequence(xdr, &args->seq_args, &hdr);
2622         encode_putfh(xdr, args->fhandle, &hdr);
2623         encode_getfattr(xdr, args->bitmask, &hdr);
2624         encode_delegreturn(xdr, args->stateid, &hdr);
2625         encode_nops(&hdr);
2626 }
2627
2628 /*
2629  * Encode FS_LOCATIONS request
2630  */
2631 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2632                                       struct xdr_stream *xdr,
2633                                       struct nfs4_fs_locations_arg *args)
2634 {
2635         struct compound_hdr hdr = {
2636                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2637         };
2638         uint32_t replen;
2639
2640         encode_compound_hdr(xdr, req, &hdr);
2641         encode_sequence(xdr, &args->seq_args, &hdr);
2642         encode_putfh(xdr, args->dir_fh, &hdr);
2643         encode_lookup(xdr, args->name, &hdr);
2644         replen = hdr.replen;    /* get the attribute into args->page */
2645         encode_fs_locations(xdr, args->bitmask, &hdr);
2646
2647         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2648                         0, PAGE_SIZE);
2649         encode_nops(&hdr);
2650 }
2651
2652 /*
2653  * Encode SECINFO request
2654  */
2655 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2656                                 struct xdr_stream *xdr,
2657                                 struct nfs4_secinfo_arg *args)
2658 {
2659         struct compound_hdr hdr = {
2660                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661         };
2662
2663         encode_compound_hdr(xdr, req, &hdr);
2664         encode_sequence(xdr, &args->seq_args, &hdr);
2665         encode_putfh(xdr, args->dir_fh, &hdr);
2666         encode_secinfo(xdr, args->name, &hdr);
2667         encode_nops(&hdr);
2668 }
2669
2670 #if defined(CONFIG_NFS_V4_1)
2671 /*
2672  * BIND_CONN_TO_SESSION request
2673  */
2674 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2675                                 struct xdr_stream *xdr,
2676                                 struct nfs_client *clp)
2677 {
2678         struct compound_hdr hdr = {
2679                 .minorversion = clp->cl_mvops->minor_version,
2680         };
2681
2682         encode_compound_hdr(xdr, req, &hdr);
2683         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2684         encode_nops(&hdr);
2685 }
2686
2687 /*
2688  * EXCHANGE_ID request
2689  */
2690 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2691                                      struct xdr_stream *xdr,
2692                                      struct nfs41_exchange_id_args *args)
2693 {
2694         struct compound_hdr hdr = {
2695                 .minorversion = args->client->cl_mvops->minor_version,
2696         };
2697
2698         encode_compound_hdr(xdr, req, &hdr);
2699         encode_exchange_id(xdr, args, &hdr);
2700         encode_nops(&hdr);
2701 }
2702
2703 /*
2704  * a CREATE_SESSION request
2705  */
2706 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2707                                         struct xdr_stream *xdr,
2708                                         struct nfs41_create_session_args *args)
2709 {
2710         struct compound_hdr hdr = {
2711                 .minorversion = args->client->cl_mvops->minor_version,
2712         };
2713
2714         encode_compound_hdr(xdr, req, &hdr);
2715         encode_create_session(xdr, args, &hdr);
2716         encode_nops(&hdr);
2717 }
2718
2719 /*
2720  * a DESTROY_SESSION request
2721  */
2722 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2723                                          struct xdr_stream *xdr,
2724                                          struct nfs4_session *session)
2725 {
2726         struct compound_hdr hdr = {
2727                 .minorversion = session->clp->cl_mvops->minor_version,
2728         };
2729
2730         encode_compound_hdr(xdr, req, &hdr);
2731         encode_destroy_session(xdr, session, &hdr);
2732         encode_nops(&hdr);
2733 }
2734
2735 /*
2736  * a DESTROY_CLIENTID request
2737  */
2738 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2739                                          struct xdr_stream *xdr,
2740                                          struct nfs_client *clp)
2741 {
2742         struct compound_hdr hdr = {
2743                 .minorversion = clp->cl_mvops->minor_version,
2744         };
2745
2746         encode_compound_hdr(xdr, req, &hdr);
2747         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2748         encode_nops(&hdr);
2749 }
2750
2751 /*
2752  * a SEQUENCE request
2753  */
2754 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2755                                   struct nfs4_sequence_args *args)
2756 {
2757         struct compound_hdr hdr = {
2758                 .minorversion = nfs4_xdr_minorversion(args),
2759         };
2760
2761         encode_compound_hdr(xdr, req, &hdr);
2762         encode_sequence(xdr, args, &hdr);
2763         encode_nops(&hdr);
2764 }
2765
2766 /*
2767  * a GET_LEASE_TIME request
2768  */
2769 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2770                                         struct xdr_stream *xdr,
2771                                         struct nfs4_get_lease_time_args *args)
2772 {
2773         struct compound_hdr hdr = {
2774                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2775         };
2776         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2777
2778         encode_compound_hdr(xdr, req, &hdr);
2779         encode_sequence(xdr, &args->la_seq_args, &hdr);
2780         encode_putrootfh(xdr, &hdr);
2781         encode_fsinfo(xdr, lease_bitmap, &hdr);
2782         encode_nops(&hdr);
2783 }
2784
2785 /*
2786  * a RECLAIM_COMPLETE request
2787  */
2788 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2789                                           struct xdr_stream *xdr,
2790                                 struct nfs41_reclaim_complete_args *args)
2791 {
2792         struct compound_hdr hdr = {
2793                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2794         };
2795
2796         encode_compound_hdr(xdr, req, &hdr);
2797         encode_sequence(xdr, &args->seq_args, &hdr);
2798         encode_reclaim_complete(xdr, args, &hdr);
2799         encode_nops(&hdr);
2800 }
2801
2802 /*
2803  * Encode GETDEVICELIST request
2804  */
2805 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2806                                        struct xdr_stream *xdr,
2807                                        struct nfs4_getdevicelist_args *args)
2808 {
2809         struct compound_hdr hdr = {
2810                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2811         };
2812
2813         encode_compound_hdr(xdr, req, &hdr);
2814         encode_sequence(xdr, &args->seq_args, &hdr);
2815         encode_putfh(xdr, args->fh, &hdr);
2816         encode_getdevicelist(xdr, args, &hdr);
2817         encode_nops(&hdr);
2818 }
2819
2820 /*
2821  * Encode GETDEVICEINFO request
2822  */
2823 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2824                                        struct xdr_stream *xdr,
2825                                        struct nfs4_getdeviceinfo_args *args)
2826 {
2827         struct compound_hdr hdr = {
2828                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2829         };
2830
2831         encode_compound_hdr(xdr, req, &hdr);
2832         encode_sequence(xdr, &args->seq_args, &hdr);
2833         encode_getdeviceinfo(xdr, args, &hdr);
2834
2835         /* set up reply kvec. Subtract notification bitmap max size (2)
2836          * so that notification bitmap is put in xdr_buf tail */
2837         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2838                          args->pdev->pages, args->pdev->pgbase,
2839                          args->pdev->pglen);
2840
2841         encode_nops(&hdr);
2842 }
2843
2844 /*
2845  *  Encode LAYOUTGET request
2846  */
2847 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2848                                    struct xdr_stream *xdr,
2849                                    struct nfs4_layoutget_args *args)
2850 {
2851         struct compound_hdr hdr = {
2852                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2853         };
2854
2855         encode_compound_hdr(xdr, req, &hdr);
2856         encode_sequence(xdr, &args->seq_args, &hdr);
2857         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2858         encode_layoutget(xdr, args, &hdr);
2859
2860         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2861             args->layout.pages, 0, args->layout.pglen);
2862
2863         encode_nops(&hdr);
2864 }
2865
2866 /*
2867  *  Encode LAYOUTCOMMIT request
2868  */
2869 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2870                                       struct xdr_stream *xdr,
2871                                       struct nfs4_layoutcommit_args *args)
2872 {
2873         struct nfs4_layoutcommit_data *data =
2874                 container_of(args, struct nfs4_layoutcommit_data, args);
2875         struct compound_hdr hdr = {
2876                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2877         };
2878
2879         encode_compound_hdr(xdr, req, &hdr);
2880         encode_sequence(xdr, &args->seq_args, &hdr);
2881         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2882         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2883         encode_getfattr(xdr, args->bitmask, &hdr);
2884         encode_nops(&hdr);
2885 }
2886
2887 /*
2888  * Encode LAYOUTRETURN request
2889  */
2890 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2891                                       struct xdr_stream *xdr,
2892                                       struct nfs4_layoutreturn_args *args)
2893 {
2894         struct compound_hdr hdr = {
2895                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2896         };
2897
2898         encode_compound_hdr(xdr, req, &hdr);
2899         encode_sequence(xdr, &args->seq_args, &hdr);
2900         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2901         encode_layoutreturn(xdr, args, &hdr);
2902         encode_nops(&hdr);
2903 }
2904
2905 /*
2906  * Encode SECINFO_NO_NAME request
2907  */
2908 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2909                                         struct xdr_stream *xdr,
2910                                         struct nfs41_secinfo_no_name_args *args)
2911 {
2912         struct compound_hdr hdr = {
2913                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2914         };
2915
2916         encode_compound_hdr(xdr, req, &hdr);
2917         encode_sequence(xdr, &args->seq_args, &hdr);
2918         encode_putrootfh(xdr, &hdr);
2919         encode_secinfo_no_name(xdr, args, &hdr);
2920         encode_nops(&hdr);
2921         return 0;
2922 }
2923
2924 /*
2925  *  Encode TEST_STATEID request
2926  */
2927 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2928                                       struct xdr_stream *xdr,
2929                                       struct nfs41_test_stateid_args *args)
2930 {
2931         struct compound_hdr hdr = {
2932                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2933         };
2934
2935         encode_compound_hdr(xdr, req, &hdr);
2936         encode_sequence(xdr, &args->seq_args, &hdr);
2937         encode_test_stateid(xdr, args, &hdr);
2938         encode_nops(&hdr);
2939 }
2940
2941 /*
2942  *  Encode FREE_STATEID request
2943  */
2944 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2945                                      struct xdr_stream *xdr,
2946                                      struct nfs41_free_stateid_args *args)
2947 {
2948         struct compound_hdr hdr = {
2949                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950         };
2951
2952         encode_compound_hdr(xdr, req, &hdr);
2953         encode_sequence(xdr, &args->seq_args, &hdr);
2954         encode_free_stateid(xdr, args, &hdr);
2955         encode_nops(&hdr);
2956 }
2957 #endif /* CONFIG_NFS_V4_1 */
2958
2959 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2960 {
2961         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2962                 "Remaining buffer length is %tu words.\n",
2963                 func, xdr->end - xdr->p);
2964 }
2965
2966 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2967 {
2968         __be32 *p;
2969
2970         p = xdr_inline_decode(xdr, 4);
2971         if (unlikely(!p))
2972                 goto out_overflow;
2973         *len = be32_to_cpup(p);
2974         p = xdr_inline_decode(xdr, *len);
2975         if (unlikely(!p))
2976                 goto out_overflow;
2977         *string = (char *)p;
2978         return 0;
2979 out_overflow:
2980         print_overflow_msg(__func__, xdr);
2981         return -EIO;
2982 }
2983
2984 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2985 {
2986         __be32 *p;
2987
2988         p = xdr_inline_decode(xdr, 8);
2989         if (unlikely(!p))
2990                 goto out_overflow;
2991         hdr->status = be32_to_cpup(p++);
2992         hdr->taglen = be32_to_cpup(p);
2993
2994         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2995         if (unlikely(!p))
2996                 goto out_overflow;
2997         hdr->tag = (char *)p;
2998         p += XDR_QUADLEN(hdr->taglen);
2999         hdr->nops = be32_to_cpup(p);
3000         if (unlikely(hdr->nops < 1))
3001                 return nfs4_stat_to_errno(hdr->status);
3002         return 0;
3003 out_overflow:
3004         print_overflow_msg(__func__, xdr);
3005         return -EIO;
3006 }
3007
3008 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3009 {
3010         __be32 *p;
3011         uint32_t opnum;
3012         int32_t nfserr;
3013
3014         p = xdr_inline_decode(xdr, 8);
3015         if (unlikely(!p))
3016                 goto out_overflow;
3017         opnum = be32_to_cpup(p++);
3018         if (opnum != expected) {
3019                 dprintk("nfs: Server returned operation"
3020                         " %d but we issued a request for %d\n",
3021                                 opnum, expected);
3022                 return -EIO;
3023         }
3024         nfserr = be32_to_cpup(p);
3025         if (nfserr != NFS_OK)
3026                 return nfs4_stat_to_errno(nfserr);
3027         return 0;
3028 out_overflow:
3029         print_overflow_msg(__func__, xdr);
3030         return -EIO;
3031 }
3032
3033 /* Dummy routine */
3034 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3035 {
3036         __be32 *p;
3037         unsigned int strlen;
3038         char *str;
3039
3040         p = xdr_inline_decode(xdr, 12);
3041         if (likely(p))
3042                 return decode_opaque_inline(xdr, &strlen, &str);
3043         print_overflow_msg(__func__, xdr);
3044         return -EIO;
3045 }
3046
3047 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3048 {
3049         uint32_t bmlen;
3050         __be32 *p;
3051
3052         p = xdr_inline_decode(xdr, 4);
3053         if (unlikely(!p))
3054                 goto out_overflow;
3055         bmlen = be32_to_cpup(p);
3056
3057         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3058         p = xdr_inline_decode(xdr, (bmlen << 2));
3059         if (unlikely(!p))
3060                 goto out_overflow;
3061         if (bmlen > 0) {
3062                 bitmap[0] = be32_to_cpup(p++);
3063                 if (bmlen > 1) {
3064                         bitmap[1] = be32_to_cpup(p++);
3065                         if (bmlen > 2)
3066                                 bitmap[2] = be32_to_cpup(p);
3067                 }
3068         }
3069         return 0;
3070 out_overflow:
3071         print_overflow_msg(__func__, xdr);
3072         return -EIO;
3073 }
3074
3075 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3076 {
3077         __be32 *p;
3078
3079         p = xdr_inline_decode(xdr, 4);
3080         if (unlikely(!p))
3081                 goto out_overflow;
3082         *attrlen = be32_to_cpup(p);
3083         *savep = xdr_stream_pos(xdr);
3084         return 0;
3085 out_overflow:
3086         print_overflow_msg(__func__, xdr);
3087         return -EIO;
3088 }
3089
3090 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3091 {
3092         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3093                 int ret;
3094                 ret = decode_attr_bitmap(xdr, bitmask);
3095                 if (unlikely(ret < 0))
3096                         return ret;
3097                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3098         } else
3099                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3100         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3101                 bitmask[0], bitmask[1], bitmask[2]);
3102         return 0;
3103 }
3104
3105 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3106 {
3107         __be32 *p;
3108         int ret = 0;
3109
3110         *type = 0;
3111         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3112                 return -EIO;
3113         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3114                 p = xdr_inline_decode(xdr, 4);
3115                 if (unlikely(!p))
3116                         goto out_overflow;
3117                 *type = be32_to_cpup(p);
3118                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3119                         dprintk("%s: bad type %d\n", __func__, *type);
3120                         return -EIO;
3121                 }
3122                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3123                 ret = NFS_ATTR_FATTR_TYPE;
3124         }
3125         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3126         return ret;
3127 out_overflow:
3128         print_overflow_msg(__func__, xdr);
3129         return -EIO;
3130 }
3131
3132 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3133                                       uint32_t *bitmap, uint32_t *type)
3134 {
3135         __be32 *p;
3136
3137         *type = 0;
3138         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3139                 return -EIO;
3140         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3141                 p = xdr_inline_decode(xdr, 4);
3142                 if (unlikely(!p))
3143                         goto out_overflow;
3144                 *type = be32_to_cpup(p);
3145                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3146         }
3147         dprintk("%s: expire type=0x%x\n", __func__, *type);
3148         return 0;
3149 out_overflow:
3150         print_overflow_msg(__func__, xdr);
3151         return -EIO;
3152 }
3153
3154 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3155 {
3156         __be32 *p;
3157         int ret = 0;
3158
3159         *change = 0;
3160         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3161                 return -EIO;
3162         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3163                 p = xdr_inline_decode(xdr, 8);
3164                 if (unlikely(!p))
3165                         goto out_overflow;
3166                 xdr_decode_hyper(p, change);
3167                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3168                 ret = NFS_ATTR_FATTR_CHANGE;
3169         }
3170         dprintk("%s: change attribute=%Lu\n", __func__,
3171                         (unsigned long long)*change);
3172         return ret;
3173 out_overflow:
3174         print_overflow_msg(__func__, xdr);
3175         return -EIO;
3176 }
3177
3178 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3179 {
3180         __be32 *p;
3181         int ret = 0;
3182
3183         *size = 0;
3184         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3185                 return -EIO;
3186         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3187                 p = xdr_inline_decode(xdr, 8);
3188                 if (unlikely(!p))
3189                         goto out_overflow;
3190                 xdr_decode_hyper(p, size);
3191                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3192                 ret = NFS_ATTR_FATTR_SIZE;
3193         }
3194         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3195         return ret;
3196 out_overflow:
3197         print_overflow_msg(__func__, xdr);
3198         return -EIO;
3199 }
3200
3201 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3202 {
3203         __be32 *p;
3204
3205         *res = 0;
3206         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3207                 return -EIO;
3208         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3209                 p = xdr_inline_decode(xdr, 4);
3210                 if (unlikely(!p))
3211                         goto out_overflow;
3212                 *res = be32_to_cpup(p);
3213                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3214         }
3215         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3216         return 0;
3217 out_overflow:
3218         print_overflow_msg(__func__, xdr);
3219         return -EIO;
3220 }
3221
3222 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3223 {
3224         __be32 *p;
3225
3226         *res = 0;
3227         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3228                 return -EIO;
3229         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3230                 p = xdr_inline_decode(xdr, 4);
3231                 if (unlikely(!p))
3232                         goto out_overflow;
3233                 *res = be32_to_cpup(p);
3234                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3235         }
3236         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3237         return 0;
3238 out_overflow:
3239         print_overflow_msg(__func__, xdr);
3240         return -EIO;
3241 }
3242
3243 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3244 {
3245         __be32 *p;
3246         int ret = 0;
3247
3248         fsid->major = 0;
3249         fsid->minor = 0;
3250         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3251                 return -EIO;
3252         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3253                 p = xdr_inline_decode(xdr, 16);
3254                 if (unlikely(!p))
3255                         goto out_overflow;
3256                 p = xdr_decode_hyper(p, &fsid->major);
3257                 xdr_decode_hyper(p, &fsid->minor);
3258                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3259                 ret = NFS_ATTR_FATTR_FSID;
3260         }
3261         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3262                         (unsigned long long)fsid->major,
3263                         (unsigned long long)fsid->minor);
3264         return ret;
3265 out_overflow:
3266         print_overflow_msg(__func__, xdr);
3267         return -EIO;
3268 }
3269
3270 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3271 {
3272         __be32 *p;
3273
3274         *res = 60;
3275         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3276                 return -EIO;
3277         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3278                 p = xdr_inline_decode(xdr, 4);
3279                 if (unlikely(!p))
3280                         goto out_overflow;
3281                 *res = be32_to_cpup(p);
3282                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3283         }
3284         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3285         return 0;
3286 out_overflow:
3287         print_overflow_msg(__func__, xdr);
3288         return -EIO;
3289 }
3290
3291 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3292 {
3293         __be32 *p;
3294
3295         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3296                 return -EIO;
3297         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3298                 p = xdr_inline_decode(xdr, 4);
3299                 if (unlikely(!p))
3300                         goto out_overflow;
3301                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3302                 *res = -be32_to_cpup(p);
3303         }
3304         return 0;
3305 out_overflow:
3306         print_overflow_msg(__func__, xdr);
3307         return -EIO;
3308 }
3309
3310 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3311 {
3312         __be32 *p;
3313         int len;
3314
3315         if (fh != NULL)
3316                 memset(fh, 0, sizeof(*fh));
3317
3318         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3319                 return -EIO;
3320         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3321                 p = xdr_inline_decode(xdr, 4);
3322                 if (unlikely(!p))
3323                         goto out_overflow;
3324                 len = be32_to_cpup(p);
3325                 if (len > NFS4_FHSIZE)
3326                         return -EIO;
3327                 p = xdr_inline_decode(xdr, len);
3328                 if (unlikely(!p))
3329                         goto out_overflow;
3330                 if (fh != NULL) {
3331                         memcpy(fh->data, p, len);
3332                         fh->size = len;
3333                 }
3334                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3335         }
3336         return 0;
3337 out_overflow:
3338         print_overflow_msg(__func__, xdr);
3339         return -EIO;
3340 }
3341
3342 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3343 {
3344         __be32 *p;
3345
3346         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3347         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3348                 return -EIO;
3349         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3350                 p = xdr_inline_decode(xdr, 4);
3351                 if (unlikely(!p))
3352                         goto out_overflow;
3353                 *res = be32_to_cpup(p);
3354                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3355         }
3356         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3357         return 0;
3358 out_overflow:
3359         print_overflow_msg(__func__, xdr);
3360         return -EIO;
3361 }
3362
3363 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3364 {
3365         __be32 *p;
3366         int ret = 0;
3367
3368         *fileid = 0;
3369         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3370                 return -EIO;
3371         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3372                 p = xdr_inline_decode(xdr, 8);
3373                 if (unlikely(!p))
3374                         goto out_overflow;
3375                 xdr_decode_hyper(p, fileid);
3376                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3377                 ret = NFS_ATTR_FATTR_FILEID;
3378         }
3379         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3380         return ret;
3381 out_overflow:
3382         print_overflow_msg(__func__, xdr);
3383         return -EIO;
3384 }
3385
3386 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3387 {
3388         __be32 *p;
3389         int ret = 0;
3390
3391         *fileid = 0;
3392         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3393                 return -EIO;
3394         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3395                 p = xdr_inline_decode(xdr, 8);
3396                 if (unlikely(!p))
3397                         goto out_overflow;
3398                 xdr_decode_hyper(p, fileid);
3399                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3400                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3401         }
3402         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3403         return ret;
3404 out_overflow:
3405         print_overflow_msg(__func__, xdr);
3406         return -EIO;
3407 }
3408
3409 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3410 {
3411         __be32 *p;
3412         int status = 0;
3413
3414         *res = 0;
3415         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3416                 return -EIO;
3417         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3418                 p = xdr_inline_decode(xdr, 8);
3419                 if (unlikely(!p))
3420                         goto out_overflow;
3421                 xdr_decode_hyper(p, res);
3422                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3423         }
3424         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3425         return status;
3426 out_overflow:
3427         print_overflow_msg(__func__, xdr);
3428         return -EIO;
3429 }
3430
3431 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3432 {
3433         __be32 *p;
3434         int status = 0;
3435
3436         *res = 0;
3437         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3438                 return -EIO;
3439         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3440                 p = xdr_inline_decode(xdr, 8);
3441                 if (unlikely(!p))
3442                         goto out_overflow;
3443                 xdr_decode_hyper(p, res);
3444                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3445         }
3446         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3447         return status;
3448 out_overflow:
3449         print_overflow_msg(__func__, xdr);
3450         return -EIO;
3451 }
3452
3453 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3454 {
3455         __be32 *p;
3456         int status = 0;
3457
3458         *res = 0;
3459         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3460                 return -EIO;
3461         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3462                 p = xdr_inline_decode(xdr, 8);
3463                 if (unlikely(!p))
3464                         goto out_overflow;
3465                 xdr_decode_hyper(p, res);
3466                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3467         }
3468         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3469         return status;
3470 out_overflow:
3471         print_overflow_msg(__func__, xdr);
3472         return -EIO;
3473 }
3474
3475 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3476 {
3477         u32 n;
3478         __be32 *p;
3479         int status = 0;
3480
3481         p = xdr_inline_decode(xdr, 4);
3482         if (unlikely(!p))
3483                 goto out_overflow;
3484         n = be32_to_cpup(p);
3485         if (n == 0)
3486                 goto root_path;
3487         dprintk("pathname4: ");
3488         path->ncomponents = 0;
3489         while (path->ncomponents < n) {
3490                 struct nfs4_string *component = &path->components[path->ncomponents];
3491                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3492                 if (unlikely(status != 0))
3493                         goto out_eio;
3494                 ifdebug (XDR)
3495                         pr_cont("%s%.*s ",
3496                                 (path->ncomponents != n ? "/ " : ""),
3497                                 component->len, component->data);
3498                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3499                         path->ncomponents++;
3500                 else {
3501                         dprintk("cannot parse %d components in path\n", n);
3502                         goto out_eio;
3503                 }
3504         }
3505 out:
3506         return status;
3507 root_path:
3508 /* a root pathname is sent as a zero component4 */
3509         path->ncomponents = 1;
3510         path->components[0].len=0;
3511         path->components[0].data=NULL;
3512         dprintk("pathname4: /\n");
3513         goto out;
3514 out_eio:
3515         dprintk(" status %d", status);
3516         status = -EIO;
3517         goto out;
3518 out_overflow:
3519         print_overflow_msg(__func__, xdr);
3520         return -EIO;
3521 }
3522
3523 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3524 {
3525         int n;
3526         __be32 *p;
3527         int status = -EIO;
3528
3529         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3530                 goto out;
3531         status = 0;
3532         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3533                 goto out;
3534         status = -EIO;
3535         /* Ignore borken servers that return unrequested attrs */
3536         if (unlikely(res == NULL))
3537                 goto out;
3538         dprintk("%s: fsroot:\n", __func__);
3539         status = decode_pathname(xdr, &res->fs_path);
3540         if (unlikely(status != 0))
3541                 goto out;
3542         p = xdr_inline_decode(xdr, 4);
3543         if (unlikely(!p))
3544                 goto out_overflow;
3545         n = be32_to_cpup(p);
3546         if (n <= 0)
3547                 goto out_eio;
3548         res->nlocations = 0;
3549         while (res->nlocations < n) {
3550                 u32 m;
3551                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3552
3553                 p = xdr_inline_decode(xdr, 4);
3554                 if (unlikely(!p))
3555                         goto out_overflow;
3556                 m = be32_to_cpup(p);
3557
3558                 loc->nservers = 0;
3559                 dprintk("%s: servers:\n", __func__);
3560                 while (loc->nservers < m) {
3561                         struct nfs4_string *server = &loc->servers[loc->nservers];
3562                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3563                         if (unlikely(status != 0))
3564                                 goto out_eio;
3565                         dprintk("%s ", server->data);
3566                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3567                                 loc->nservers++;
3568                         else {
3569                                 unsigned int i;
3570                                 dprintk("%s: using first %u of %u servers "
3571                                         "returned for location %u\n",
3572                                                 __func__,
3573                                                 NFS4_FS_LOCATION_MAXSERVERS,
3574                                                 m, res->nlocations);
3575                                 for (i = loc->nservers; i < m; i++) {
3576                                         unsigned int len;
3577                                         char *data;
3578                                         status = decode_opaque_inline(xdr, &len, &data);
3579                                         if (unlikely(status != 0))
3580                                                 goto out_eio;
3581                                 }
3582                         }
3583                 }
3584                 status = decode_pathname(xdr, &loc->rootpath);
3585                 if (unlikely(status != 0))
3586                         goto out_eio;
3587                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3588                         res->nlocations++;
3589         }
3590         if (res->nlocations != 0)
3591                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3592 out:
3593         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3594         return status;
3595 out_overflow:
3596         print_overflow_msg(__func__, xdr);
3597 out_eio:
3598         status = -EIO;
3599         goto out;
3600 }
3601
3602 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3603 {
3604         __be32 *p;
3605         int status = 0;
3606
3607         *res = 0;
3608         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3609                 return -EIO;
3610         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3611                 p = xdr_inline_decode(xdr, 8);
3612                 if (unlikely(!p))
3613                         goto out_overflow;
3614                 xdr_decode_hyper(p, res);
3615                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3616         }
3617         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3618         return status;
3619 out_overflow:
3620         print_overflow_msg(__func__, xdr);
3621         return -EIO;
3622 }
3623
3624 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3625 {
3626         __be32 *p;
3627         int status = 0;
3628
3629         *maxlink = 1;
3630         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3631                 return -EIO;
3632         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3633                 p = xdr_inline_decode(xdr, 4);
3634                 if (unlikely(!p))
3635                         goto out_overflow;
3636                 *maxlink = be32_to_cpup(p);
3637                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3638         }
3639         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3640         return status;
3641 out_overflow:
3642         print_overflow_msg(__func__, xdr);
3643         return -EIO;
3644 }
3645
3646 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3647 {
3648         __be32 *p;
3649         int status = 0;
3650
3651         *maxname = 1024;
3652         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3653                 return -EIO;
3654         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3655                 p = xdr_inline_decode(xdr, 4);
3656                 if (unlikely(!p))
3657                         goto out_overflow;
3658                 *maxname = be32_to_cpup(p);
3659                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3660         }
3661         dprintk("%s: maxname=%u\n", __func__, *maxname);
3662         return status;
3663 out_overflow:
3664         print_overflow_msg(__func__, xdr);
3665         return -EIO;
3666 }
3667
3668 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3669 {
3670         __be32 *p;
3671         int status = 0;
3672
3673         *res = 1024;
3674         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3675                 return -EIO;
3676         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3677                 uint64_t maxread;
3678                 p = xdr_inline_decode(xdr, 8);
3679                 if (unlikely(!p))
3680                         goto out_overflow;
3681                 xdr_decode_hyper(p, &maxread);
3682                 if (maxread > 0x7FFFFFFF)
3683                         maxread = 0x7FFFFFFF;
3684                 *res = (uint32_t)maxread;
3685                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3686         }
3687         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3688         return status;
3689 out_overflow:
3690         print_overflow_msg(__func__, xdr);
3691         return -EIO;
3692 }
3693
3694 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3695 {
3696         __be32 *p;
3697         int status = 0;
3698
3699         *res = 1024;
3700         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3701                 return -EIO;
3702         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3703                 uint64_t maxwrite;
3704                 p = xdr_inline_decode(xdr, 8);
3705                 if (unlikely(!p))
3706                         goto out_overflow;
3707                 xdr_decode_hyper(p, &maxwrite);
3708                 if (maxwrite > 0x7FFFFFFF)
3709                         maxwrite = 0x7FFFFFFF;
3710                 *res = (uint32_t)maxwrite;
3711                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3712         }
3713         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3714         return status;
3715 out_overflow:
3716         print_overflow_msg(__func__, xdr);
3717         return -EIO;
3718 }
3719
3720 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3721 {
3722         uint32_t tmp;
3723         __be32 *p;
3724         int ret = 0;
3725
3726         *mode = 0;
3727         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3728                 return -EIO;
3729         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3730                 p = xdr_inline_decode(xdr, 4);
3731                 if (unlikely(!p))
3732                         goto out_overflow;
3733                 tmp = be32_to_cpup(p);
3734                 *mode = tmp & ~S_IFMT;
3735                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3736                 ret = NFS_ATTR_FATTR_MODE;
3737         }
3738         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3739         return ret;
3740 out_overflow:
3741         print_overflow_msg(__func__, xdr);
3742         return -EIO;
3743 }
3744
3745 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3746 {
3747         __be32 *p;
3748         int ret = 0;
3749
3750         *nlink = 1;
3751         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3752                 return -EIO;
3753         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3754                 p = xdr_inline_decode(xdr, 4);
3755                 if (unlikely(!p))
3756                         goto out_overflow;
3757                 *nlink = be32_to_cpup(p);
3758                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3759                 ret = NFS_ATTR_FATTR_NLINK;
3760         }
3761         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3762         return ret;
3763 out_overflow:
3764         print_overflow_msg(__func__, xdr);
3765         return -EIO;
3766 }
3767
3768 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3769                 const struct nfs_server *server, uint32_t *uid,
3770                 struct nfs4_string *owner_name)
3771 {
3772         uint32_t len;
3773         __be32 *p;
3774         int ret = 0;
3775
3776         *uid = -2;
3777         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3778                 return -EIO;
3779         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3780                 p = xdr_inline_decode(xdr, 4);
3781                 if (unlikely(!p))
3782                         goto out_overflow;
3783                 len = be32_to_cpup(p);
3784                 p = xdr_inline_decode(xdr, len);
3785                 if (unlikely(!p))
3786                         goto out_overflow;
3787                 if (owner_name != NULL) {
3788                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3789                         if (owner_name->data != NULL) {
3790                                 owner_name->len = len;
3791                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3792                         }
3793                 } else if (len < XDR_MAX_NETOBJ) {
3794                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3795                                 ret = NFS_ATTR_FATTR_OWNER;
3796                         else
3797                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3798                                                 __func__);
3799                 } else
3800                         dprintk("%s: name too long (%u)!\n",
3801                                         __func__, len);
3802                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3803         }
3804         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3805         return ret;
3806 out_overflow:
3807         print_overflow_msg(__func__, xdr);
3808         return -EIO;
3809 }
3810
3811 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3812                 const struct nfs_server *server, uint32_t *gid,
3813                 struct nfs4_string *group_name)
3814 {
3815         uint32_t len;
3816         __be32 *p;
3817         int ret = 0;
3818
3819         *gid = -2;
3820         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3821                 return -EIO;
3822         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3823                 p = xdr_inline_decode(xdr, 4);
3824                 if (unlikely(!p))
3825                         goto out_overflow;
3826                 len = be32_to_cpup(p);
3827                 p = xdr_inline_decode(xdr, len);
3828                 if (unlikely(!p))
3829                         goto out_overflow;
3830                 if (group_name != NULL) {
3831                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3832                         if (group_name->data != NULL) {
3833                                 group_name->len = len;
3834                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3835                         }
3836                 } else if (len < XDR_MAX_NETOBJ) {
3837                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3838                                 ret = NFS_ATTR_FATTR_GROUP;
3839                         else
3840                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3841                                                 __func__);
3842                 } else
3843                         dprintk("%s: name too long (%u)!\n",
3844                                         __func__, len);
3845                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3846         }
3847         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3848         return ret;
3849 out_overflow:
3850         print_overflow_msg(__func__, xdr);
3851         return -EIO;
3852 }
3853
3854 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3855 {
3856         uint32_t major = 0, minor = 0;
3857         __be32 *p;
3858         int ret = 0;
3859
3860         *rdev = MKDEV(0,0);
3861         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3862                 return -EIO;
3863         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3864                 dev_t tmp;
3865
3866                 p = xdr_inline_decode(xdr, 8);
3867                 if (unlikely(!p))
3868                         goto out_overflow;
3869                 major = be32_to_cpup(p++);
3870                 minor = be32_to_cpup(p);
3871                 tmp = MKDEV(major, minor);
3872                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3873                         *rdev = tmp;
3874                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3875                 ret = NFS_ATTR_FATTR_RDEV;
3876         }
3877         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3878         return ret;
3879 out_overflow:
3880         print_overflow_msg(__func__, xdr);
3881         return -EIO;
3882 }
3883
3884 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3885 {
3886         __be32 *p;
3887         int status = 0;
3888
3889         *res = 0;
3890         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3891                 return -EIO;
3892         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3893                 p = xdr_inline_decode(xdr, 8);
3894                 if (unlikely(!p))
3895                         goto out_overflow;
3896                 xdr_decode_hyper(p, res);
3897                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3898         }
3899         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3900         return status;
3901 out_overflow:
3902         print_overflow_msg(__func__, xdr);
3903         return -EIO;
3904 }
3905
3906 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3907 {
3908         __be32 *p;
3909         int status = 0;
3910
3911         *res = 0;
3912         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3913                 return -EIO;
3914         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3915                 p = xdr_inline_decode(xdr, 8);
3916                 if (unlikely(!p))
3917                         goto out_overflow;
3918                 xdr_decode_hyper(p, res);
3919                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3920         }
3921         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3922         return status;
3923 out_overflow:
3924         print_overflow_msg(__func__, xdr);
3925         return -EIO;
3926 }
3927
3928 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3929 {
3930         __be32 *p;
3931         int status = 0;
3932
3933         *res = 0;
3934         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3935                 return -EIO;
3936         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3937                 p = xdr_inline_decode(xdr, 8);
3938                 if (unlikely(!p))
3939                         goto out_overflow;
3940                 xdr_decode_hyper(p, res);
3941                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3942         }
3943         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3944         return status;
3945 out_overflow:
3946         print_overflow_msg(__func__, xdr);
3947         return -EIO;
3948 }
3949
3950 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3951 {
3952         __be32 *p;
3953         int ret = 0;
3954
3955         *used = 0;
3956         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3957                 return -EIO;
3958         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3959                 p = xdr_inline_decode(xdr, 8);
3960                 if (unlikely(!p))
3961                         goto out_overflow;
3962                 xdr_decode_hyper(p, used);
3963                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3964                 ret = NFS_ATTR_FATTR_SPACE_USED;
3965         }
3966         dprintk("%s: space used=%Lu\n", __func__,
3967                         (unsigned long long)*used);
3968         return ret;
3969 out_overflow:
3970         print_overflow_msg(__func__, xdr);
3971         return -EIO;
3972 }
3973
3974 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3975 {
3976         __be32 *p;
3977         uint64_t sec;
3978         uint32_t nsec;
3979
3980         p = xdr_inline_decode(xdr, 12);
3981         if (unlikely(!p))
3982                 goto out_overflow;
3983         p = xdr_decode_hyper(p, &sec);
3984         nsec = be32_to_cpup(p);
3985         time->tv_sec = (time_t)sec;
3986         time->tv_nsec = (long)nsec;
3987         return 0;
3988 out_overflow:
3989         print_overflow_msg(__func__, xdr);
3990         return -EIO;
3991 }
3992
3993 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3994 {
3995         int status = 0;
3996
3997         time->tv_sec = 0;
3998         time->tv_nsec = 0;
3999         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4000                 return -EIO;
4001         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4002                 status = decode_attr_time(xdr, time);
4003                 if (status == 0)
4004                         status = NFS_ATTR_FATTR_ATIME;
4005                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4006         }
4007         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4008         return status;
4009 }
4010
4011 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4012 {
4013         int status = 0;
4014
4015         time->tv_sec = 0;
4016         time->tv_nsec = 0;
4017         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4018                 return -EIO;
4019         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4020                 status = decode_attr_time(xdr, time);
4021                 if (status == 0)
4022                         status = NFS_ATTR_FATTR_CTIME;
4023                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4024         }
4025         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4026         return status;
4027 }
4028
4029 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4030                                   struct timespec *time)
4031 {
4032         int status = 0;
4033
4034         time->tv_sec = 0;
4035         time->tv_nsec = 0;
4036         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4037                 return -EIO;
4038         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4039                 status = decode_attr_time(xdr, time);
4040                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4041         }
4042         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4043                 (long)time->tv_nsec);
4044         return status;
4045 }
4046
4047 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4048 {
4049         int status = 0;
4050
4051         time->tv_sec = 0;
4052         time->tv_nsec = 0;
4053         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4054                 return -EIO;
4055         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4056                 status = decode_attr_time(xdr, time);
4057                 if (status == 0)
4058                         status = NFS_ATTR_FATTR_MTIME;
4059                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4060         }
4061         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4062         return status;
4063 }
4064
4065 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4066 {
4067         unsigned int attrwords = XDR_QUADLEN(attrlen);
4068         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4069
4070         if (unlikely(attrwords != nwords)) {
4071                 dprintk("%s: server returned incorrect attribute length: "
4072                         "%u %c %u\n",
4073                                 __func__,
4074                                 attrwords << 2,
4075                                 (attrwords < nwords) ? '<' : '>',
4076                                 nwords << 2);
4077                 return -EIO;
4078         }
4079         return 0;
4080 }
4081
4082 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4083 {
4084         __be32 *p;
4085
4086         p = xdr_inline_decode(xdr, 20);
4087         if (unlikely(!p))
4088                 goto out_overflow;
4089         cinfo->atomic = be32_to_cpup(p++);
4090         p = xdr_decode_hyper(p, &cinfo->before);
4091         xdr_decode_hyper(p, &cinfo->after);
4092         return 0;
4093 out_overflow:
4094         print_overflow_msg(__func__, xdr);
4095         return -EIO;
4096 }
4097
4098 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
4099 {
4100         __be32 *p;
4101         uint32_t supp, acc;
4102         int status;
4103
4104         status = decode_op_hdr(xdr, OP_ACCESS);
4105         if (status)
4106                 return status;
4107         p = xdr_inline_decode(xdr, 8);
4108         if (unlikely(!p))
4109                 goto out_overflow;
4110         supp = be32_to_cpup(p++);
4111         acc = be32_to_cpup(p);
4112         access->supported = supp;
4113         access->access = acc;
4114         return 0;
4115 out_overflow:
4116         print_overflow_msg(__func__, xdr);
4117         return -EIO;
4118 }
4119
4120 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4121 {
4122         __be32 *p;
4123
4124         p = xdr_inline_decode(xdr, len);
4125         if (likely(p)) {
4126                 memcpy(buf, p, len);
4127                 return 0;
4128         }
4129         print_overflow_msg(__func__, xdr);
4130         return -EIO;
4131 }
4132
4133 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4134 {
4135         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4136 }
4137
4138 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4139 {
4140         int status;
4141
4142         status = decode_op_hdr(xdr, OP_CLOSE);
4143         if (status != -EIO)
4144                 nfs_increment_open_seqid(status, res->seqid);
4145         if (!status)
4146                 status = decode_stateid(xdr, &res->stateid);
4147         return status;
4148 }
4149
4150 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4151 {
4152         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4153 }
4154
4155 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4156 {
4157         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4158 }
4159
4160 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4161 {
4162         int status;
4163
4164         status = decode_op_hdr(xdr, OP_COMMIT);
4165         if (!status)
4166                 status = decode_write_verifier(xdr, &res->verf->verifier);
4167         return status;
4168 }
4169
4170 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4171 {
4172         __be32 *p;
4173         uint32_t bmlen;
4174         int status;
4175
4176         status = decode_op_hdr(xdr, OP_CREATE);
4177         if (status)
4178                 return status;
4179         if ((status = decode_change_info(xdr, cinfo)))
4180                 return status;
4181         p = xdr_inline_decode(xdr, 4);
4182         if (unlikely(!p))
4183                 goto out_overflow;
4184         bmlen = be32_to_cpup(p);
4185         p = xdr_inline_decode(xdr, bmlen << 2);
4186         if (likely(p))
4187                 return 0;
4188 out_overflow:
4189         print_overflow_msg(__func__, xdr);
4190         return -EIO;
4191 }
4192
4193 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4194 {
4195         unsigned int savep;
4196         uint32_t attrlen, bitmap[3] = {0};
4197         int status;
4198
4199         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4200                 goto xdr_error;
4201         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4202                 goto xdr_error;
4203         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4204                 goto xdr_error;
4205         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4206                 goto xdr_error;
4207         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4208                                                  &res->fh_expire_type)) != 0)
4209                 goto xdr_error;
4210         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4211                 goto xdr_error;
4212         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4213                 goto xdr_error;
4214         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4215                 goto xdr_error;
4216         status = verify_attr_len(xdr, savep, attrlen);
4217 xdr_error:
4218         dprintk("%s: xdr returned %d!\n", __func__, -status);
4219         return status;
4220 }
4221
4222 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4223 {
4224         unsigned int savep;
4225         uint32_t attrlen, bitmap[3] = {0};
4226         int status;
4227
4228         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4229                 goto xdr_error;
4230         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4231                 goto xdr_error;
4232         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4233                 goto xdr_error;
4234
4235         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4236                 goto xdr_error;
4237         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4238                 goto xdr_error;
4239         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4240                 goto xdr_error;
4241         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4242                 goto xdr_error;
4243         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4244                 goto xdr_error;
4245         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4246                 goto xdr_error;
4247
4248         status = verify_attr_len(xdr, savep, attrlen);
4249 xdr_error:
4250         dprintk("%s: xdr returned %d!\n", __func__, -status);
4251         return status;
4252 }
4253
4254 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4255 {
4256         unsigned int savep;
4257         uint32_t attrlen, bitmap[3] = {0};
4258         int status;
4259
4260         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4261                 goto xdr_error;
4262         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4263                 goto xdr_error;
4264         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4265                 goto xdr_error;
4266
4267         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4268                 goto xdr_error;
4269         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4270                 goto xdr_error;
4271
4272         status = verify_attr_len(xdr, savep, attrlen);
4273 xdr_error:
4274         dprintk("%s: xdr returned %d!\n", __func__, -status);
4275         return status;
4276 }
4277
4278 static int decode_threshold_hint(struct xdr_stream *xdr,
4279                                   uint32_t *bitmap,
4280                                   uint64_t *res,
4281                                   uint32_t hint_bit)
4282 {
4283         __be32 *p;
4284
4285         *res = 0;
4286         if (likely(bitmap[0] & hint_bit)) {
4287                 p = xdr_inline_decode(xdr, 8);
4288                 if (unlikely(!p))
4289                         goto out_overflow;
4290                 xdr_decode_hyper(p, res);
4291         }
4292         return 0;
4293 out_overflow:
4294         print_overflow_msg(__func__, xdr);
4295         return -EIO;
4296 }
4297
4298 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4299                                         struct nfs4_threshold *res)
4300 {
4301         __be32 *p;
4302         unsigned int savep;
4303         uint32_t bitmap[3] = {0,}, attrlen;
4304         int status;
4305
4306         /* layout type */
4307         p = xdr_inline_decode(xdr, 4);
4308         if (unlikely(!p)) {
4309                 print_overflow_msg(__func__, xdr);
4310                 return -EIO;
4311         }
4312         res->l_type = be32_to_cpup(p);
4313
4314         /* thi_hintset bitmap */
4315         status = decode_attr_bitmap(xdr, bitmap);
4316         if (status < 0)
4317                 goto xdr_error;
4318
4319         /* thi_hintlist length */
4320         status = decode_attr_length(xdr, &attrlen, &savep);
4321         if (status < 0)
4322                 goto xdr_error;
4323         /* thi_hintlist */
4324         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4325         if (status < 0)
4326                 goto xdr_error;
4327         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4328         if (status < 0)
4329                 goto xdr_error;
4330         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4331                                        THRESHOLD_RD_IO);
4332         if (status < 0)
4333                 goto xdr_error;
4334         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4335                                        THRESHOLD_WR_IO);
4336         if (status < 0)
4337                 goto xdr_error;
4338
4339         status = verify_attr_len(xdr, savep, attrlen);
4340         res->bm = bitmap[0];
4341
4342         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4343                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4344                 res->wr_io_sz);
4345 xdr_error:
4346         dprintk("%s ret=%d!\n", __func__, status);
4347         return status;
4348 }
4349
4350 /*
4351  * Thresholds on pNFS direct I/O vrs MDS I/O
4352  */
4353 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4354                                     uint32_t *bitmap,
4355                                     struct nfs4_threshold *res)
4356 {
4357         __be32 *p;
4358         int status = 0;
4359         uint32_t num;
4360
4361         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4362                 return -EIO;
4363         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4364                 /* Did the server return an unrequested attribute? */
4365                 if (unlikely(res == NULL))
4366                         return -EREMOTEIO;
4367                 p = xdr_inline_decode(xdr, 4);
4368                 if (unlikely(!p))
4369                         goto out_overflow;
4370                 num = be32_to_cpup(p);
4371                 if (num == 0)
4372                         return 0;
4373                 if (num > 1)
4374                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4375                                 "drivers per filesystem not supported\n",
4376                                 __func__);
4377
4378                 status = decode_first_threshold_item4(xdr, res);
4379                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4380         }
4381         return status;
4382 out_overflow:
4383         print_overflow_msg(__func__, xdr);
4384         return -EIO;
4385 }
4386
4387 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4388                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4389                 struct nfs4_fs_locations *fs_loc,
4390                 const struct nfs_server *server)
4391 {
4392         int status;
4393         umode_t fmode = 0;
4394         uint32_t type;
4395         int32_t err;
4396
4397         status = decode_attr_type(xdr, bitmap, &type);
4398         if (status < 0)
4399                 goto xdr_error;
4400         fattr->mode = 0;
4401         if (status != 0) {
4402                 fattr->mode |= nfs_type2fmt[type];
4403                 fattr->valid |= status;
4404         }
4405
4406         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4407         if (status < 0)
4408                 goto xdr_error;
4409         fattr->valid |= status;
4410
4411         status = decode_attr_size(xdr, bitmap, &fattr->size);
4412         if (status < 0)
4413                 goto xdr_error;
4414         fattr->valid |= status;
4415
4416         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4417         if (status < 0)
4418                 goto xdr_error;
4419         fattr->valid |= status;
4420
4421         err = 0;
4422         status = decode_attr_error(xdr, bitmap, &err);
4423         if (status < 0)
4424                 goto xdr_error;
4425
4426         status = decode_attr_filehandle(xdr, bitmap, fh);
4427         if (status < 0)
4428                 goto xdr_error;
4429
4430         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4431         if (status < 0)
4432                 goto xdr_error;
4433         fattr->valid |= status;
4434
4435         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4436         if (status < 0)
4437                 goto xdr_error;
4438         fattr->valid |= status;
4439
4440         status = decode_attr_mode(xdr, bitmap, &fmode);
4441         if (status < 0)
4442                 goto xdr_error;
4443         if (status != 0) {
4444                 fattr->mode |= fmode;
4445                 fattr->valid |= status;
4446         }
4447
4448         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4449         if (status < 0)
4450                 goto xdr_error;
4451         fattr->valid |= status;
4452
4453         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4454         if (status < 0)
4455                 goto xdr_error;
4456         fattr->valid |= status;
4457
4458         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4459         if (status < 0)
4460                 goto xdr_error;
4461         fattr->valid |= status;
4462
4463         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4464         if (status < 0)
4465                 goto xdr_error;
4466         fattr->valid |= status;
4467
4468         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4469         if (status < 0)
4470                 goto xdr_error;
4471         fattr->valid |= status;
4472
4473         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4474         if (status < 0)
4475                 goto xdr_error;
4476         fattr->valid |= status;
4477
4478         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4479         if (status < 0)
4480                 goto xdr_error;
4481         fattr->valid |= status;
4482
4483         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4484         if (status < 0)
4485                 goto xdr_error;
4486         fattr->valid |= status;
4487
4488         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4489         if (status < 0)
4490                 goto xdr_error;
4491         fattr->valid |= status;
4492
4493         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4494         if (status < 0)
4495                 goto xdr_error;
4496
4497 xdr_error:
4498         dprintk("%s: xdr returned %d\n", __func__, -status);
4499         return status;
4500 }
4501
4502 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4503                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4504                 const struct nfs_server *server)
4505 {
4506         unsigned int savep;
4507         uint32_t attrlen,
4508                  bitmap[3] = {0};
4509         int status;
4510
4511         status = decode_op_hdr(xdr, OP_GETATTR);
4512         if (status < 0)
4513                 goto xdr_error;
4514
4515         status = decode_attr_bitmap(xdr, bitmap);
4516         if (status < 0)
4517                 goto xdr_error;
4518
4519         status = decode_attr_length(xdr, &attrlen, &savep);
4520         if (status < 0)
4521                 goto xdr_error;
4522
4523         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4524         if (status < 0)
4525                 goto xdr_error;
4526
4527         status = verify_attr_len(xdr, savep, attrlen);
4528 xdr_error:
4529         dprintk("%s: xdr returned %d\n", __func__, -status);
4530         return status;
4531 }
4532
4533 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4534                 const struct nfs_server *server)
4535 {
4536         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4537 }
4538
4539 /*
4540  * Decode potentially multiple layout types. Currently we only support
4541  * one layout driver per file system.
4542  */
4543 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4544                                          uint32_t *layouttype)
4545 {
4546         uint32_t *p;
4547         int num;
4548
4549         p = xdr_inline_decode(xdr, 4);
4550         if (unlikely(!p))
4551                 goto out_overflow;
4552         num = be32_to_cpup(p);
4553
4554         /* pNFS is not supported by the underlying file system */
4555         if (num == 0) {
4556                 *layouttype = 0;
4557                 return 0;
4558         }
4559         if (num > 1)
4560                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4561                         "drivers per filesystem not supported\n", __func__);
4562
4563         /* Decode and set first layout type, move xdr->p past unused types */
4564         p = xdr_inline_decode(xdr, num * 4);
4565         if (unlikely(!p))
4566                 goto out_overflow;
4567         *layouttype = be32_to_cpup(p);
4568         return 0;
4569 out_overflow:
4570         print_overflow_msg(__func__, xdr);
4571         return -EIO;
4572 }
4573
4574 /*
4575  * The type of file system exported.
4576  * Note we must ensure that layouttype is set in any non-error case.
4577  */
4578 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4579                                 uint32_t *layouttype)
4580 {
4581         int status = 0;
4582
4583         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4584         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4585                 return -EIO;
4586         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4587                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4588                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4589         } else
4590                 *layouttype = 0;
4591         return status;
4592 }
4593
4594 /*
4595  * The prefered block size for layout directed io
4596  */
4597 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4598                                       uint32_t *res)
4599 {
4600         __be32 *p;
4601
4602         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4603         *res = 0;
4604         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4605                 p = xdr_inline_decode(xdr, 4);
4606                 if (unlikely(!p)) {
4607                         print_overflow_msg(__func__, xdr);
4608                         return -EIO;
4609                 }
4610                 *res = be32_to_cpup(p);
4611                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4612         }
4613         return 0;
4614 }
4615
4616 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4617 {
4618         unsigned int savep;
4619         uint32_t attrlen, bitmap[3];
4620         int status;
4621
4622         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4623                 goto xdr_error;
4624         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4625                 goto xdr_error;
4626         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4627                 goto xdr_error;
4628
4629         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4630
4631         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4632                 goto xdr_error;
4633         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4634                 goto xdr_error;
4635         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4636                 goto xdr_error;
4637         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4638         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4639                 goto xdr_error;
4640         fsinfo->wtpref = fsinfo->wtmax;
4641         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4642         if (status != 0)
4643                 goto xdr_error;
4644         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4645         if (status != 0)
4646                 goto xdr_error;
4647         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4648         if (status)
4649                 goto xdr_error;
4650
4651         status = verify_attr_len(xdr, savep, attrlen);
4652 xdr_error:
4653         dprintk("%s: xdr returned %d!\n", __func__, -status);
4654         return status;
4655 }
4656
4657 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4658 {
4659         __be32 *p;
4660         uint32_t len;
4661         int status;
4662
4663         /* Zero handle first to allow comparisons */
4664         memset(fh, 0, sizeof(*fh));
4665
4666         status = decode_op_hdr(xdr, OP_GETFH);
4667         if (status)
4668                 return status;
4669
4670         p = xdr_inline_decode(xdr, 4);
4671         if (unlikely(!p))
4672                 goto out_overflow;
4673         len = be32_to_cpup(p);
4674         if (len > NFS4_FHSIZE)
4675                 return -EIO;
4676         fh->size = len;
4677         p = xdr_inline_decode(xdr, len);
4678         if (unlikely(!p))
4679                 goto out_overflow;
4680         memcpy(fh->data, p, len);
4681         return 0;
4682 out_overflow:
4683         print_overflow_msg(__func__, xdr);
4684         return -EIO;
4685 }
4686
4687 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4688 {
4689         int status;
4690
4691         status = decode_op_hdr(xdr, OP_LINK);
4692         if (status)
4693                 return status;
4694         return decode_change_info(xdr, cinfo);
4695 }
4696
4697 /*
4698  * We create the owner, so we know a proper owner.id length is 4.
4699  */
4700 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4701 {
4702         uint64_t offset, length, clientid;
4703         __be32 *p;
4704         uint32_t namelen, type;
4705
4706         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4707         if (unlikely(!p))
4708                 goto out_overflow;
4709         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4710         p = xdr_decode_hyper(p, &length);
4711         type = be32_to_cpup(p++); /* 4 byte read */
4712         if (fl != NULL) { /* manipulate file lock */
4713                 fl->fl_start = (loff_t)offset;
4714                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4715                 if (length == ~(uint64_t)0)
4716                         fl->fl_end = OFFSET_MAX;
4717                 fl->fl_type = F_WRLCK;
4718                 if (type & 1)
4719                         fl->fl_type = F_RDLCK;
4720                 fl->fl_pid = 0;
4721         }
4722         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4723         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4724         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4725         if (likely(p))
4726                 return -NFS4ERR_DENIED;
4727 out_overflow:
4728         print_overflow_msg(__func__, xdr);
4729         return -EIO;
4730 }
4731
4732 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4733 {
4734         int status;
4735
4736         status = decode_op_hdr(xdr, OP_LOCK);
4737         if (status == -EIO)
4738                 goto out;
4739         if (status == 0) {
4740                 status = decode_stateid(xdr, &res->stateid);
4741                 if (unlikely(status))
4742                         goto out;
4743         } else if (status == -NFS4ERR_DENIED)
4744                 status = decode_lock_denied(xdr, NULL);
4745         if (res->open_seqid != NULL)
4746                 nfs_increment_open_seqid(status, res->open_seqid);
4747         nfs_increment_lock_seqid(status, res->lock_seqid);
4748 out:
4749         return status;
4750 }
4751
4752 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4753 {
4754         int status;
4755         status = decode_op_hdr(xdr, OP_LOCKT);
4756         if (status == -NFS4ERR_DENIED)
4757                 return decode_lock_denied(xdr, res->denied);
4758         return status;
4759 }
4760
4761 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4762 {
4763         int status;
4764
4765         status = decode_op_hdr(xdr, OP_LOCKU);
4766         if (status != -EIO)
4767                 nfs_increment_lock_seqid(status, res->seqid);
4768         if (status == 0)
4769                 status = decode_stateid(xdr, &res->stateid);
4770         return status;
4771 }
4772
4773 static int decode_release_lockowner(struct xdr_stream *xdr)
4774 {
4775         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4776 }
4777
4778 static int decode_lookup(struct xdr_stream *xdr)
4779 {
4780         return decode_op_hdr(xdr, OP_LOOKUP);
4781 }
4782
4783 /* This is too sick! */
4784 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4785 {
4786         __be32 *p;
4787         uint32_t limit_type, nblocks, blocksize;
4788
4789         p = xdr_inline_decode(xdr, 12);
4790         if (unlikely(!p))
4791                 goto out_overflow;
4792         limit_type = be32_to_cpup(p++);
4793         switch (limit_type) {
4794         case 1:
4795                 xdr_decode_hyper(p, maxsize);
4796                 break;
4797         case 2:
4798                 nblocks = be32_to_cpup(p++);
4799                 blocksize = be32_to_cpup(p);
4800                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4801         }
4802         return 0;
4803 out_overflow:
4804         print_overflow_msg(__func__, xdr);
4805         return -EIO;
4806 }
4807
4808 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4809 {
4810         __be32 *p;
4811         uint32_t delegation_type;
4812         int status;
4813
4814         p = xdr_inline_decode(xdr, 4);
4815         if (unlikely(!p))
4816                 goto out_overflow;
4817         delegation_type = be32_to_cpup(p);
4818         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4819                 res->delegation_type = 0;
4820                 return 0;
4821         }
4822         status = decode_stateid(xdr, &res->delegation);
4823         if (unlikely(status))
4824                 return status;
4825         p = xdr_inline_decode(xdr, 4);
4826         if (unlikely(!p))
4827                 goto out_overflow;
4828         res->do_recall = be32_to_cpup(p);
4829
4830         switch (delegation_type) {
4831         case NFS4_OPEN_DELEGATE_READ:
4832                 res->delegation_type = FMODE_READ;
4833                 break;
4834         case NFS4_OPEN_DELEGATE_WRITE:
4835                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4836                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4837                                 return -EIO;
4838         }
4839         return decode_ace(xdr, NULL, res->server->nfs_client);
4840 out_overflow:
4841         print_overflow_msg(__func__, xdr);
4842         return -EIO;
4843 }
4844
4845 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4846 {
4847         __be32 *p;
4848         uint32_t savewords, bmlen, i;
4849         int status;
4850
4851         status = decode_op_hdr(xdr, OP_OPEN);
4852         if (status != -EIO)
4853                 nfs_increment_open_seqid(status, res->seqid);
4854         if (!status)
4855                 status = decode_stateid(xdr, &res->stateid);
4856         if (unlikely(status))
4857                 return status;
4858
4859         decode_change_info(xdr, &res->cinfo);
4860
4861         p = xdr_inline_decode(xdr, 8);
4862         if (unlikely(!p))
4863                 goto out_overflow;
4864         res->rflags = be32_to_cpup(p++);
4865         bmlen = be32_to_cpup(p);
4866         if (bmlen > 10)
4867                 goto xdr_error;
4868
4869         p = xdr_inline_decode(xdr, bmlen << 2);
4870         if (unlikely(!p))
4871                 goto out_overflow;
4872         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4873         for (i = 0; i < savewords; ++i)
4874                 res->attrset[i] = be32_to_cpup(p++);
4875         for (; i < NFS4_BITMAP_SIZE; i++)
4876                 res->attrset[i] = 0;
4877
4878         return decode_delegation(xdr, res);
4879 xdr_error:
4880         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4881         return -EIO;
4882 out_overflow:
4883         print_overflow_msg(__func__, xdr);
4884         return -EIO;
4885 }
4886
4887 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4888 {
4889         int status;
4890
4891         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4892         if (status != -EIO)
4893                 nfs_increment_open_seqid(status, res->seqid);
4894         if (!status)
4895                 status = decode_stateid(xdr, &res->stateid);
4896         return status;
4897 }
4898
4899 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4900 {
4901         int status;
4902
4903         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4904         if (status != -EIO)
4905                 nfs_increment_open_seqid(status, res->seqid);
4906         if (!status)
4907                 status = decode_stateid(xdr, &res->stateid);
4908         return status;
4909 }
4910
4911 static int decode_putfh(struct xdr_stream *xdr)
4912 {
4913         return decode_op_hdr(xdr, OP_PUTFH);
4914 }
4915
4916 static int decode_putrootfh(struct xdr_stream *xdr)
4917 {
4918         return decode_op_hdr(xdr, OP_PUTROOTFH);
4919 }
4920
4921 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4922 {
4923         __be32 *p;
4924         uint32_t count, eof, recvd;
4925         int status;
4926
4927         status = decode_op_hdr(xdr, OP_READ);
4928         if (status)
4929                 return status;
4930         p = xdr_inline_decode(xdr, 8);
4931         if (unlikely(!p))
4932                 goto out_overflow;
4933         eof = be32_to_cpup(p++);
4934         count = be32_to_cpup(p);
4935         recvd = xdr_read_pages(xdr, count);
4936         if (count > recvd) {
4937                 dprintk("NFS: server cheating in read reply: "
4938                                 "count %u > recvd %u\n", count, recvd);
4939                 count = recvd;
4940                 eof = 0;
4941         }
4942         res->eof = eof;
4943         res->count = count;
4944         return 0;
4945 out_overflow:
4946         print_overflow_msg(__func__, xdr);
4947         return -EIO;
4948 }
4949
4950 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4951 {
4952         int             status;
4953         __be32          verf[2];
4954
4955         status = decode_op_hdr(xdr, OP_READDIR);
4956         if (!status)
4957                 status = decode_verifier(xdr, readdir->verifier.data);
4958         if (unlikely(status))
4959                 return status;
4960         memcpy(verf, readdir->verifier.data, sizeof(verf));
4961         dprintk("%s: verifier = %08x:%08x\n",
4962                         __func__, verf[0], verf[1]);
4963         return xdr_read_pages(xdr, xdr->buf->page_len);
4964 }
4965
4966 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4967 {
4968         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4969         u32 len, recvd;
4970         __be32 *p;
4971         int status;
4972
4973         status = decode_op_hdr(xdr, OP_READLINK);
4974         if (status)
4975                 return status;
4976
4977         /* Convert length of symlink */
4978         p = xdr_inline_decode(xdr, 4);
4979         if (unlikely(!p))
4980                 goto out_overflow;
4981         len = be32_to_cpup(p);
4982         if (len >= rcvbuf->page_len || len <= 0) {
4983                 dprintk("nfs: server returned giant symlink!\n");
4984                 return -ENAMETOOLONG;
4985         }
4986         recvd = xdr_read_pages(xdr, len);
4987         if (recvd < len) {
4988                 dprintk("NFS: server cheating in readlink reply: "
4989                                 "count %u > recvd %u\n", len, recvd);
4990                 return -EIO;
4991         }
4992         /*
4993          * The XDR encode routine has set things up so that
4994          * the link text will be copied directly into the
4995          * buffer.  We just have to do overflow-checking,
4996          * and and null-terminate the text (the VFS expects
4997          * null-termination).
4998          */
4999         xdr_terminate_string(rcvbuf, len);
5000         return 0;
5001 out_overflow:
5002         print_overflow_msg(__func__, xdr);
5003         return -EIO;
5004 }
5005
5006 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5007 {
5008         int status;
5009
5010         status = decode_op_hdr(xdr, OP_REMOVE);
5011         if (status)
5012                 goto out;
5013         status = decode_change_info(xdr, cinfo);
5014 out:
5015         return status;
5016 }
5017
5018 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5019               struct nfs4_change_info *new_cinfo)
5020 {
5021         int status;
5022
5023         status = decode_op_hdr(xdr, OP_RENAME);
5024         if (status)
5025                 goto out;
5026         if ((status = decode_change_info(xdr, old_cinfo)))
5027                 goto out;
5028         status = decode_change_info(xdr, new_cinfo);
5029 out:
5030         return status;
5031 }
5032
5033 static int decode_renew(struct xdr_stream *xdr)
5034 {
5035         return decode_op_hdr(xdr, OP_RENEW);
5036 }
5037
5038 static int
5039 decode_restorefh(struct xdr_stream *xdr)
5040 {
5041         return decode_op_hdr(xdr, OP_RESTOREFH);
5042 }
5043
5044 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5045                          struct nfs_getaclres *res)
5046 {
5047         unsigned int savep;
5048         __be32 *bm_p;
5049         uint32_t attrlen,
5050                  bitmap[3] = {0};
5051         int status;
5052         size_t page_len = xdr->buf->page_len;
5053
5054         res->acl_len = 0;
5055         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5056                 goto out;
5057
5058         bm_p = xdr->p;
5059         res->acl_data_offset = be32_to_cpup(bm_p) + 2;
5060         res->acl_data_offset <<= 2;
5061         /* Check if the acl data starts beyond the allocated buffer */
5062         if (res->acl_data_offset > page_len)
5063                 return -ERANGE;
5064
5065         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5066                 goto out;
5067         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5068                 goto out;
5069
5070         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5071                 return -EIO;
5072         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5073
5074                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5075                  * are stored with the acl data to handle the problem of
5076                  * variable length bitmaps.*/
5077                 xdr->p = bm_p;
5078
5079                 /* We ignore &savep and don't do consistency checks on
5080                  * the attr length.  Let userspace figure it out.... */
5081                 attrlen += res->acl_data_offset;
5082                 if (attrlen > page_len) {
5083                         if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
5084                                 /* getxattr interface called with a NULL buf */
5085                                 res->acl_len = attrlen;
5086                                 goto out;
5087                         }
5088                         dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5089                                         attrlen, page_len);
5090                         return -EINVAL;
5091                 }
5092                 xdr_read_pages(xdr, attrlen);
5093                 res->acl_len = attrlen;
5094         } else
5095                 status = -EOPNOTSUPP;
5096
5097 out:
5098         return status;
5099 }
5100
5101 static int
5102 decode_savefh(struct xdr_stream *xdr)
5103 {
5104         return decode_op_hdr(xdr, OP_SAVEFH);
5105 }
5106
5107 static int decode_setattr(struct xdr_stream *xdr)
5108 {
5109         __be32 *p;
5110         uint32_t bmlen;
5111         int status;
5112
5113         status = decode_op_hdr(xdr, OP_SETATTR);
5114         if (status)
5115                 return status;
5116         p = xdr_inline_decode(xdr, 4);
5117         if (unlikely(!p))
5118                 goto out_overflow;
5119         bmlen = be32_to_cpup(p);
5120         p = xdr_inline_decode(xdr, bmlen << 2);
5121         if (likely(p))
5122                 return 0;
5123 out_overflow:
5124         print_overflow_msg(__func__, xdr);
5125         return -EIO;
5126 }
5127
5128 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5129 {
5130         __be32 *p;
5131         uint32_t opnum;
5132         int32_t nfserr;
5133
5134         p = xdr_inline_decode(xdr, 8);
5135         if (unlikely(!p))
5136                 goto out_overflow;
5137         opnum = be32_to_cpup(p++);
5138         if (opnum != OP_SETCLIENTID) {
5139                 dprintk("nfs: decode_setclientid: Server returned operation"
5140                         " %d\n", opnum);
5141                 return -EIO;
5142         }
5143         nfserr = be32_to_cpup(p);
5144         if (nfserr == NFS_OK) {
5145                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5146                 if (unlikely(!p))
5147                         goto out_overflow;
5148                 p = xdr_decode_hyper(p, &res->clientid);
5149                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5150         } else if (nfserr == NFSERR_CLID_INUSE) {
5151                 uint32_t len;
5152
5153                 /* skip netid string */
5154                 p = xdr_inline_decode(xdr, 4);
5155                 if (unlikely(!p))
5156                         goto out_overflow;
5157                 len = be32_to_cpup(p);
5158                 p = xdr_inline_decode(xdr, len);
5159                 if (unlikely(!p))
5160                         goto out_overflow;
5161
5162                 /* skip uaddr string */
5163                 p = xdr_inline_decode(xdr, 4);
5164                 if (unlikely(!p))
5165                         goto out_overflow;
5166                 len = be32_to_cpup(p);
5167                 p = xdr_inline_decode(xdr, len);
5168                 if (unlikely(!p))
5169                         goto out_overflow;
5170                 return -NFSERR_CLID_INUSE;
5171         } else
5172                 return nfs4_stat_to_errno(nfserr);
5173
5174         return 0;
5175 out_overflow:
5176         print_overflow_msg(__func__, xdr);
5177         return -EIO;
5178 }
5179
5180 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5181 {
5182         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5183 }
5184
5185 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5186 {
5187         __be32 *p;
5188         int status;
5189
5190         status = decode_op_hdr(xdr, OP_WRITE);
5191         if (status)
5192                 return status;
5193
5194         p = xdr_inline_decode(xdr, 8);
5195         if (unlikely(!p))
5196                 goto out_overflow;
5197         res->count = be32_to_cpup(p++);
5198         res->verf->committed = be32_to_cpup(p++);
5199         return decode_write_verifier(xdr, &res->verf->verifier);
5200 out_overflow:
5201         print_overflow_msg(__func__, xdr);
5202         return -EIO;
5203 }
5204
5205 static int decode_delegreturn(struct xdr_stream *xdr)
5206 {
5207         return decode_op_hdr(xdr, OP_DELEGRETURN);
5208 }
5209
5210 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5211 {
5212         __be32 *p;
5213
5214         p = xdr_inline_decode(xdr, 4);
5215         if (unlikely(!p))
5216                 goto out_overflow;
5217         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5218         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5219                 goto out_err;
5220
5221         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5222         if (unlikely(!p))
5223                 goto out_overflow;
5224         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5225
5226         p = xdr_inline_decode(xdr, 8);
5227         if (unlikely(!p))
5228                 goto out_overflow;
5229         flavor->gss.qop4 = be32_to_cpup(p++);
5230         flavor->gss.service = be32_to_cpup(p);
5231
5232         return 0;
5233
5234 out_overflow:
5235         print_overflow_msg(__func__, xdr);
5236         return -EIO;
5237 out_err:
5238         return -EINVAL;
5239 }
5240
5241 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5242 {
5243         struct nfs4_secinfo_flavor *sec_flavor;
5244         int status;
5245         __be32 *p;
5246         int i, num_flavors;
5247
5248         p = xdr_inline_decode(xdr, 4);
5249         if (unlikely(!p))
5250                 goto out_overflow;
5251
5252         res->flavors->num_flavors = 0;
5253         num_flavors = be32_to_cpup(p);
5254
5255         for (i = 0; i < num_flavors; i++) {
5256                 sec_flavor = &res->flavors->flavors[i];
5257                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5258                         break;
5259
5260                 p = xdr_inline_decode(xdr, 4);
5261                 if (unlikely(!p))
5262                         goto out_overflow;
5263                 sec_flavor->flavor = be32_to_cpup(p);
5264
5265                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5266                         status = decode_secinfo_gss(xdr, sec_flavor);
5267                         if (status)
5268                                 goto out;
5269                 }
5270                 res->flavors->num_flavors++;
5271         }
5272
5273         status = 0;
5274 out:
5275         return status;
5276 out_overflow:
5277         print_overflow_msg(__func__, xdr);
5278         return -EIO;
5279 }
5280
5281 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5282 {
5283         int status = decode_op_hdr(xdr, OP_SECINFO);
5284         if (status)
5285                 return status;
5286         return decode_secinfo_common(xdr, res);
5287 }
5288
5289 #if defined(CONFIG_NFS_V4_1)
5290 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5291 {
5292         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5293         if (status)
5294                 return status;
5295         return decode_secinfo_common(xdr, res);
5296 }
5297
5298 static int decode_exchange_id(struct xdr_stream *xdr,
5299                               struct nfs41_exchange_id_res *res)
5300 {
5301         __be32 *p;
5302         uint32_t dummy;
5303         char *dummy_str;
5304         int status;
5305         uint32_t impl_id_count;
5306
5307         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5308         if (status)
5309                 return status;
5310
5311         p = xdr_inline_decode(xdr, 8);
5312         if (unlikely(!p))
5313                 goto out_overflow;
5314         xdr_decode_hyper(p, &res->clientid);
5315         p = xdr_inline_decode(xdr, 12);
5316         if (unlikely(!p))
5317                 goto out_overflow;
5318         res->seqid = be32_to_cpup(p++);
5319         res->flags = be32_to_cpup(p++);
5320
5321         /* We ask for SP4_NONE */
5322         dummy = be32_to_cpup(p);
5323         if (dummy != SP4_NONE)
5324                 return -EIO;
5325
5326         /* server_owner4.so_minor_id */
5327         p = xdr_inline_decode(xdr, 8);
5328         if (unlikely(!p))
5329                 goto out_overflow;
5330         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5331
5332         /* server_owner4.so_major_id */
5333         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5334         if (unlikely(status))
5335                 return status;
5336         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5337                 return -EIO;
5338         memcpy(res->server_owner->major_id, dummy_str, dummy);
5339         res->server_owner->major_id_sz = dummy;
5340
5341         /* server_scope4 */
5342         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5343         if (unlikely(status))
5344                 return status;
5345         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5346                 return -EIO;
5347         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5348         res->server_scope->server_scope_sz = dummy;
5349
5350         /* Implementation Id */
5351         p = xdr_inline_decode(xdr, 4);
5352         if (unlikely(!p))
5353                 goto out_overflow;
5354         impl_id_count = be32_to_cpup(p++);
5355
5356         if (impl_id_count) {
5357                 /* nii_domain */
5358                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5359                 if (unlikely(status))
5360                         return status;
5361                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5362                         return -EIO;
5363                 memcpy(res->impl_id->domain, dummy_str, dummy);
5364
5365                 /* nii_name */
5366                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5367                 if (unlikely(status))
5368                         return status;
5369                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5370                         return -EIO;
5371                 memcpy(res->impl_id->name, dummy_str, dummy);
5372
5373                 /* nii_date */
5374                 p = xdr_inline_decode(xdr, 12);
5375                 if (unlikely(!p))
5376                         goto out_overflow;
5377                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5378                 res->impl_id->date.nseconds = be32_to_cpup(p);
5379
5380                 /* if there's more than one entry, ignore the rest */
5381         }
5382         return 0;
5383 out_overflow:
5384         print_overflow_msg(__func__, xdr);
5385         return -EIO;
5386 }
5387
5388 static int decode_chan_attrs(struct xdr_stream *xdr,
5389                              struct nfs4_channel_attrs *attrs)
5390 {
5391         __be32 *p;
5392         u32 nr_attrs, val;
5393
5394         p = xdr_inline_decode(xdr, 28);
5395         if (unlikely(!p))
5396                 goto out_overflow;
5397         val = be32_to_cpup(p++);        /* headerpadsz */
5398         if (val)
5399                 return -EINVAL;         /* no support for header padding yet */
5400         attrs->max_rqst_sz = be32_to_cpup(p++);
5401         attrs->max_resp_sz = be32_to_cpup(p++);
5402         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5403         attrs->max_ops = be32_to_cpup(p++);
5404         attrs->max_reqs = be32_to_cpup(p++);
5405         nr_attrs = be32_to_cpup(p);
5406         if (unlikely(nr_attrs > 1)) {
5407                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5408                         "count %u\n", __func__, nr_attrs);
5409                 return -EINVAL;
5410         }
5411         if (nr_attrs == 1) {
5412                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5413                 if (unlikely(!p))
5414                         goto out_overflow;
5415         }
5416         return 0;
5417 out_overflow:
5418         print_overflow_msg(__func__, xdr);
5419         return -EIO;
5420 }
5421
5422 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5423 {
5424         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5425 }
5426
5427 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5428                                 struct nfs41_bind_conn_to_session_res *res)
5429 {
5430         __be32 *p;
5431         int status;
5432
5433         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5434         if (!status)
5435                 status = decode_sessionid(xdr, &res->session->sess_id);
5436         if (unlikely(status))
5437                 return status;
5438
5439         /* dir flags, rdma mode bool */
5440         p = xdr_inline_decode(xdr, 8);
5441         if (unlikely(!p))
5442                 goto out_overflow;
5443
5444         res->dir = be32_to_cpup(p++);
5445         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5446                 return -EIO;
5447         if (be32_to_cpup(p) == 0)
5448                 res->use_conn_in_rdma_mode = false;
5449         else
5450                 res->use_conn_in_rdma_mode = true;
5451
5452         return 0;
5453 out_overflow:
5454         print_overflow_msg(__func__, xdr);
5455         return -EIO;
5456 }
5457
5458 static int decode_create_session(struct xdr_stream *xdr,
5459                                  struct nfs41_create_session_res *res)
5460 {
5461         __be32 *p;
5462         int status;
5463         struct nfs_client *clp = res->client;
5464         struct nfs4_session *session = clp->cl_session;
5465
5466         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5467         if (!status)
5468                 status = decode_sessionid(xdr, &session->sess_id);
5469         if (unlikely(status))
5470                 return status;
5471
5472         /* seqid, flags */
5473         p = xdr_inline_decode(xdr, 8);
5474         if (unlikely(!p))
5475                 goto out_overflow;
5476         clp->cl_seqid = be32_to_cpup(p++);
5477         session->flags = be32_to_cpup(p);
5478
5479         /* Channel attributes */
5480         status = decode_chan_attrs(xdr, &session->fc_attrs);
5481         if (!status)
5482                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5483         return status;
5484 out_overflow:
5485         print_overflow_msg(__func__, xdr);
5486         return -EIO;
5487 }
5488
5489 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5490 {
5491         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5492 }
5493
5494 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5495 {
5496         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5497 }
5498
5499 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5500 {
5501         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5502 }
5503 #endif /* CONFIG_NFS_V4_1 */
5504
5505 static int decode_sequence(struct xdr_stream *xdr,
5506                            struct nfs4_sequence_res *res,
5507                            struct rpc_rqst *rqstp)
5508 {
5509 #if defined(CONFIG_NFS_V4_1)
5510         struct nfs4_sessionid id;
5511         u32 dummy;
5512         int status;
5513         __be32 *p;
5514
5515         if (!res->sr_session)
5516                 return 0;
5517
5518         status = decode_op_hdr(xdr, OP_SEQUENCE);
5519         if (!status)
5520                 status = decode_sessionid(xdr, &id);
5521         if (unlikely(status))
5522                 goto out_err;
5523
5524         /*
5525          * If the server returns different values for sessionID, slotID or
5526          * sequence number, the server is looney tunes.
5527          */
5528         status = -EREMOTEIO;
5529
5530         if (memcmp(id.data, res->sr_session->sess_id.data,
5531                    NFS4_MAX_SESSIONID_LEN)) {
5532                 dprintk("%s Invalid session id\n", __func__);
5533                 goto out_err;
5534         }
5535
5536         p = xdr_inline_decode(xdr, 20);
5537         if (unlikely(!p))
5538                 goto out_overflow;
5539
5540         /* seqid */
5541         dummy = be32_to_cpup(p++);
5542         if (dummy != res->sr_slot->seq_nr) {
5543                 dprintk("%s Invalid sequence number\n", __func__);
5544                 goto out_err;
5545         }
5546         /* slot id */
5547         dummy = be32_to_cpup(p++);
5548         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5549                 dprintk("%s Invalid slot id\n", __func__);
5550                 goto out_err;
5551         }
5552         /* highest slot id - currently not processed */
5553         dummy = be32_to_cpup(p++);
5554         /* target highest slot id - currently not processed */
5555         dummy = be32_to_cpup(p++);
5556         /* result flags */
5557         res->sr_status_flags = be32_to_cpup(p);
5558         status = 0;
5559 out_err:
5560         res->sr_status = status;
5561         return status;
5562 out_overflow:
5563         print_overflow_msg(__func__, xdr);
5564         status = -EIO;
5565         goto out_err;
5566 #else  /* CONFIG_NFS_V4_1 */
5567         return 0;
5568 #endif /* CONFIG_NFS_V4_1 */
5569 }
5570
5571 #if defined(CONFIG_NFS_V4_1)
5572 /*
5573  * TODO: Need to handle case when EOF != true;
5574  */
5575 static int decode_getdevicelist(struct xdr_stream *xdr,
5576                                 struct pnfs_devicelist *res)
5577 {
5578         __be32 *p;
5579         int status, i;
5580         nfs4_verifier verftemp;
5581
5582         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5583         if (status)
5584                 return status;
5585
5586         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5587         if (unlikely(!p))
5588                 goto out_overflow;
5589
5590         /* TODO: Skip cookie for now */
5591         p += 2;
5592
5593         /* Read verifier */
5594         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5595
5596         res->num_devs = be32_to_cpup(p);
5597
5598         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5599
5600         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5601                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5602                                 __func__, res->num_devs);
5603                 return -EIO;
5604         }
5605
5606         p = xdr_inline_decode(xdr,
5607                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5608         if (unlikely(!p))
5609                 goto out_overflow;
5610         for (i = 0; i < res->num_devs; i++)
5611                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5612                                             NFS4_DEVICEID4_SIZE);
5613         res->eof = be32_to_cpup(p);
5614         return 0;
5615 out_overflow:
5616         print_overflow_msg(__func__, xdr);
5617         return -EIO;
5618 }
5619
5620 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5621                                 struct pnfs_device *pdev)
5622 {
5623         __be32 *p;
5624         uint32_t len, type;
5625         int status;
5626
5627         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5628         if (status) {
5629                 if (status == -ETOOSMALL) {
5630                         p = xdr_inline_decode(xdr, 4);
5631                         if (unlikely(!p))
5632                                 goto out_overflow;
5633                         pdev->mincount = be32_to_cpup(p);
5634                         dprintk("%s: Min count too small. mincnt = %u\n",
5635                                 __func__, pdev->mincount);
5636                 }
5637                 return status;
5638         }
5639
5640         p = xdr_inline_decode(xdr, 8);
5641         if (unlikely(!p))
5642                 goto out_overflow;
5643         type = be32_to_cpup(p++);
5644         if (type != pdev->layout_type) {
5645                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5646                         __func__, pdev->layout_type, type);
5647                 return -EINVAL;
5648         }
5649         /*
5650          * Get the length of the opaque device_addr4. xdr_read_pages places
5651          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5652          * and places the remaining xdr data in xdr_buf->tail
5653          */
5654         pdev->mincount = be32_to_cpup(p);
5655         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5656
5657         /* Parse notification bitmap, verifying that it is zero. */
5658         p = xdr_inline_decode(xdr, 4);
5659         if (unlikely(!p))
5660                 goto out_overflow;
5661         len = be32_to_cpup(p);
5662         if (len) {
5663                 uint32_t i;
5664
5665                 p = xdr_inline_decode(xdr, 4 * len);
5666                 if (unlikely(!p))
5667                         goto out_overflow;
5668                 for (i = 0; i < len; i++, p++) {
5669                         if (be32_to_cpup(p)) {
5670                                 dprintk("%s: notifications not supported\n",
5671                                         __func__);
5672                                 return -EIO;
5673                         }
5674                 }
5675         }
5676         return 0;
5677 out_overflow:
5678         print_overflow_msg(__func__, xdr);
5679         return -EIO;
5680 }
5681
5682 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5683                             struct nfs4_layoutget_res *res)
5684 {
5685         __be32 *p;
5686         int status;
5687         u32 layout_count;
5688         u32 recvd;
5689
5690         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5691         if (status)
5692                 return status;
5693         p = xdr_inline_decode(xdr, 4);
5694         if (unlikely(!p))
5695                 goto out_overflow;
5696         res->return_on_close = be32_to_cpup(p);
5697         decode_stateid(xdr, &res->stateid);
5698         p = xdr_inline_decode(xdr, 4);
5699         if (unlikely(!p))
5700                 goto out_overflow;
5701         layout_count = be32_to_cpup(p);
5702         if (!layout_count) {
5703                 dprintk("%s: server responded with empty layout array\n",
5704                         __func__);
5705                 return -EINVAL;
5706         }
5707
5708         p = xdr_inline_decode(xdr, 28);
5709         if (unlikely(!p))
5710                 goto out_overflow;
5711         p = xdr_decode_hyper(p, &res->range.offset);
5712         p = xdr_decode_hyper(p, &res->range.length);
5713         res->range.iomode = be32_to_cpup(p++);
5714         res->type = be32_to_cpup(p++);
5715         res->layoutp->len = be32_to_cpup(p);
5716
5717         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5718                 __func__,
5719                 (unsigned long)res->range.offset,
5720                 (unsigned long)res->range.length,
5721                 res->range.iomode,
5722                 res->type,
5723                 res->layoutp->len);
5724
5725         recvd = xdr_read_pages(xdr, res->layoutp->len);
5726         if (res->layoutp->len > recvd) {
5727                 dprintk("NFS: server cheating in layoutget reply: "
5728                                 "layout len %u > recvd %u\n",
5729                                 res->layoutp->len, recvd);
5730                 return -EINVAL;
5731         }
5732
5733         if (layout_count > 1) {
5734                 /* We only handle a length one array at the moment.  Any
5735                  * further entries are just ignored.  Note that this means
5736                  * the client may see a response that is less than the
5737                  * minimum it requested.
5738                  */
5739                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5740                         __func__, layout_count);
5741         }
5742
5743         return 0;
5744 out_overflow:
5745         print_overflow_msg(__func__, xdr);
5746         return -EIO;
5747 }
5748
5749 static int decode_layoutreturn(struct xdr_stream *xdr,
5750                                struct nfs4_layoutreturn_res *res)
5751 {
5752         __be32 *p;
5753         int status;
5754
5755         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5756         if (status)
5757                 return status;
5758         p = xdr_inline_decode(xdr, 4);
5759         if (unlikely(!p))
5760                 goto out_overflow;
5761         res->lrs_present = be32_to_cpup(p);
5762         if (res->lrs_present)
5763                 status = decode_stateid(xdr, &res->stateid);
5764         return status;
5765 out_overflow:
5766         print_overflow_msg(__func__, xdr);
5767         return -EIO;
5768 }
5769
5770 static int decode_layoutcommit(struct xdr_stream *xdr,
5771                                struct rpc_rqst *req,
5772                                struct nfs4_layoutcommit_res *res)
5773 {
5774         __be32 *p;
5775         __u32 sizechanged;
5776         int status;
5777
5778         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5779         res->status = status;
5780         if (status)
5781                 return status;
5782
5783         p = xdr_inline_decode(xdr, 4);
5784         if (unlikely(!p))
5785                 goto out_overflow;
5786         sizechanged = be32_to_cpup(p);
5787
5788         if (sizechanged) {
5789                 /* throw away new size */
5790                 p = xdr_inline_decode(xdr, 8);
5791                 if (unlikely(!p))
5792                         goto out_overflow;
5793         }
5794         return 0;
5795 out_overflow:
5796         print_overflow_msg(__func__, xdr);
5797         return -EIO;
5798 }
5799
5800 static int decode_test_stateid(struct xdr_stream *xdr,
5801                                struct nfs41_test_stateid_res *res)
5802 {
5803         __be32 *p;
5804         int status;
5805         int num_res;
5806
5807         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5808         if (status)
5809                 return status;
5810
5811         p = xdr_inline_decode(xdr, 4);
5812         if (unlikely(!p))
5813                 goto out_overflow;
5814         num_res = be32_to_cpup(p++);
5815         if (num_res != 1)
5816                 goto out;
5817
5818         p = xdr_inline_decode(xdr, 4);
5819         if (unlikely(!p))
5820                 goto out_overflow;
5821         res->status = be32_to_cpup(p++);
5822
5823         return status;
5824 out_overflow:
5825         print_overflow_msg(__func__, xdr);
5826 out:
5827         return -EIO;
5828 }
5829
5830 static int decode_free_stateid(struct xdr_stream *xdr,
5831                                struct nfs41_free_stateid_res *res)
5832 {
5833         __be32 *p;
5834         int status;
5835
5836         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5837         if (status)
5838                 return status;
5839
5840         p = xdr_inline_decode(xdr, 4);
5841         if (unlikely(!p))
5842                 goto out_overflow;
5843         res->status = be32_to_cpup(p++);
5844         return res->status;
5845 out_overflow:
5846         print_overflow_msg(__func__, xdr);
5847         return -EIO;
5848 }
5849 #endif /* CONFIG_NFS_V4_1 */
5850
5851 /*
5852  * END OF "GENERIC" DECODE ROUTINES.
5853  */
5854
5855 /*
5856  * Decode OPEN_DOWNGRADE response
5857  */
5858 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5859                                        struct xdr_stream *xdr,
5860                                        struct nfs_closeres *res)
5861 {
5862         struct compound_hdr hdr;
5863         int status;
5864
5865         status = decode_compound_hdr(xdr, &hdr);
5866         if (status)
5867                 goto out;
5868         status = decode_sequence(xdr, &res->seq_res, rqstp);
5869         if (status)
5870                 goto out;
5871         status = decode_putfh(xdr);
5872         if (status)
5873                 goto out;
5874         status = decode_open_downgrade(xdr, res);
5875         if (status != 0)
5876                 goto out;
5877         decode_getfattr(xdr, res->fattr, res->server);
5878 out:
5879         return status;
5880 }
5881
5882 /*
5883  * Decode ACCESS response
5884  */
5885 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5886                                struct nfs4_accessres *res)
5887 {
5888         struct compound_hdr hdr;
5889         int status;
5890
5891         status = decode_compound_hdr(xdr, &hdr);
5892         if (status)
5893                 goto out;
5894         status = decode_sequence(xdr, &res->seq_res, rqstp);
5895         if (status)
5896                 goto out;
5897         status = decode_putfh(xdr);
5898         if (status != 0)
5899                 goto out;
5900         status = decode_access(xdr, res);
5901         if (status != 0)
5902                 goto out;
5903         decode_getfattr(xdr, res->fattr, res->server);
5904 out:
5905         return status;
5906 }
5907
5908 /*
5909  * Decode LOOKUP response
5910  */
5911 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5912                                struct nfs4_lookup_res *res)
5913 {
5914         struct compound_hdr hdr;
5915         int status;
5916
5917         status = decode_compound_hdr(xdr, &hdr);
5918         if (status)
5919                 goto out;
5920         status = decode_sequence(xdr, &res->seq_res, rqstp);
5921         if (status)
5922                 goto out;
5923         status = decode_putfh(xdr);
5924         if (status)
5925                 goto out;
5926         status = decode_lookup(xdr);
5927         if (status)
5928                 goto out;
5929         status = decode_getfh(xdr, res->fh);
5930         if (status)
5931                 goto out;
5932         status = decode_getfattr(xdr, res->fattr, res->server);
5933 out:
5934         return status;
5935 }
5936
5937 /*
5938  * Decode LOOKUP_ROOT response
5939  */
5940 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5941                                     struct xdr_stream *xdr,
5942                                     struct nfs4_lookup_res *res)
5943 {
5944         struct compound_hdr hdr;
5945         int status;
5946
5947         status = decode_compound_hdr(xdr, &hdr);
5948         if (status)
5949                 goto out;
5950         status = decode_sequence(xdr, &res->seq_res, rqstp);
5951         if (status)
5952                 goto out;
5953         status = decode_putrootfh(xdr);
5954         if (status)
5955                 goto out;
5956         status = decode_getfh(xdr, res->fh);
5957         if (status == 0)
5958                 status = decode_getfattr(xdr, res->fattr, res->server);
5959 out:
5960         return status;
5961 }
5962
5963 /*
5964  * Decode REMOVE response
5965  */
5966 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5967                                struct nfs_removeres *res)
5968 {
5969         struct compound_hdr hdr;
5970         int status;
5971
5972         status = decode_compound_hdr(xdr, &hdr);
5973         if (status)
5974                 goto out;
5975         status = decode_sequence(xdr, &res->seq_res, rqstp);
5976         if (status)
5977                 goto out;
5978         status = decode_putfh(xdr);
5979         if (status)
5980                 goto out;
5981         status = decode_remove(xdr, &res->cinfo);
5982 out:
5983         return status;
5984 }
5985
5986 /*
5987  * Decode RENAME response
5988  */
5989 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5990                                struct nfs_renameres *res)
5991 {
5992         struct compound_hdr hdr;
5993         int status;
5994
5995         status = decode_compound_hdr(xdr, &hdr);
5996         if (status)
5997                 goto out;
5998         status = decode_sequence(xdr, &res->seq_res, rqstp);
5999         if (status)
6000                 goto out;
6001         status = decode_putfh(xdr);
6002         if (status)
6003                 goto out;
6004         status = decode_savefh(xdr);
6005         if (status)
6006                 goto out;
6007         status = decode_putfh(xdr);
6008         if (status)
6009                 goto out;
6010         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6011 out:
6012         return status;
6013 }
6014
6015 /*
6016  * Decode LINK response
6017  */
6018 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6019                              struct nfs4_link_res *res)
6020 {
6021         struct compound_hdr hdr;
6022         int status;
6023
6024         status = decode_compound_hdr(xdr, &hdr);
6025         if (status)
6026                 goto out;
6027         status = decode_sequence(xdr, &res->seq_res, rqstp);
6028         if (status)
6029                 goto out;
6030         status = decode_putfh(xdr);
6031         if (status)
6032                 goto out;
6033         status = decode_savefh(xdr);
6034         if (status)
6035                 goto out;
6036         status = decode_putfh(xdr);
6037         if (status)
6038                 goto out;
6039         status = decode_link(xdr, &res->cinfo);
6040         if (status)
6041                 goto out;
6042         /*
6043          * Note order: OP_LINK leaves the directory as the current
6044          *             filehandle.
6045          */
6046         status = decode_restorefh(xdr);
6047         if (status)
6048                 goto out;
6049         decode_getfattr(xdr, res->fattr, res->server);
6050 out:
6051         return status;
6052 }
6053
6054 /*
6055  * Decode CREATE response
6056  */
6057 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6058                                struct nfs4_create_res *res)
6059 {
6060         struct compound_hdr hdr;
6061         int status;
6062
6063         status = decode_compound_hdr(xdr, &hdr);
6064         if (status)
6065                 goto out;
6066         status = decode_sequence(xdr, &res->seq_res, rqstp);
6067         if (status)
6068                 goto out;
6069         status = decode_putfh(xdr);
6070         if (status)
6071                 goto out;
6072         status = decode_create(xdr, &res->dir_cinfo);
6073         if (status)
6074                 goto out;
6075         status = decode_getfh(xdr, res->fh);
6076         if (status)
6077                 goto out;
6078         decode_getfattr(xdr, res->fattr, res->server);
6079 out:
6080         return status;
6081 }
6082
6083 /*
6084  * Decode SYMLINK response
6085  */
6086 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6087                                 struct nfs4_create_res *res)
6088 {
6089         return nfs4_xdr_dec_create(rqstp, xdr, res);
6090 }
6091
6092 /*
6093  * Decode GETATTR response
6094  */
6095 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6096                                 struct nfs4_getattr_res *res)
6097 {
6098         struct compound_hdr hdr;
6099         int status;
6100
6101         status = decode_compound_hdr(xdr, &hdr);
6102         if (status)
6103                 goto out;
6104         status = decode_sequence(xdr, &res->seq_res, rqstp);
6105         if (status)
6106                 goto out;
6107         status = decode_putfh(xdr);
6108         if (status)
6109                 goto out;
6110         status = decode_getfattr(xdr, res->fattr, res->server);
6111 out:
6112         return status;
6113 }
6114
6115 /*
6116  * Encode an SETACL request
6117  */
6118 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6119                                 struct nfs_setaclargs *args)
6120 {
6121         struct compound_hdr hdr = {
6122                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6123         };
6124
6125         encode_compound_hdr(xdr, req, &hdr);
6126         encode_sequence(xdr, &args->seq_args, &hdr);
6127         encode_putfh(xdr, args->fh, &hdr);
6128         encode_setacl(xdr, args, &hdr);
6129         encode_nops(&hdr);
6130 }
6131
6132 /*
6133  * Decode SETACL response
6134  */
6135 static int
6136 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6137                     struct nfs_setaclres *res)
6138 {
6139         struct compound_hdr hdr;
6140         int status;
6141
6142         status = decode_compound_hdr(xdr, &hdr);
6143         if (status)
6144                 goto out;
6145         status = decode_sequence(xdr, &res->seq_res, rqstp);
6146         if (status)
6147                 goto out;
6148         status = decode_putfh(xdr);
6149         if (status)
6150                 goto out;
6151         status = decode_setattr(xdr);
6152 out:
6153         return status;
6154 }
6155
6156 /*
6157  * Decode GETACL response
6158  */
6159 static int
6160 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6161                     struct nfs_getaclres *res)
6162 {
6163         struct compound_hdr hdr;
6164         int status;
6165
6166         if (res->acl_scratch != NULL) {
6167                 void *p = page_address(res->acl_scratch);
6168                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6169         }
6170         status = decode_compound_hdr(xdr, &hdr);
6171         if (status)
6172                 goto out;
6173         status = decode_sequence(xdr, &res->seq_res, rqstp);
6174         if (status)
6175                 goto out;
6176         status = decode_putfh(xdr);
6177         if (status)
6178                 goto out;
6179         status = decode_getacl(xdr, rqstp, res);
6180
6181 out:
6182         return status;
6183 }
6184
6185 /*
6186  * Decode CLOSE response
6187  */
6188 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6189                               struct nfs_closeres *res)
6190 {
6191         struct compound_hdr hdr;
6192         int status;
6193
6194         status = decode_compound_hdr(xdr, &hdr);
6195         if (status)
6196                 goto out;
6197         status = decode_sequence(xdr, &res->seq_res, rqstp);
6198         if (status)
6199                 goto out;
6200         status = decode_putfh(xdr);
6201         if (status)
6202                 goto out;
6203         status = decode_close(xdr, res);
6204         if (status != 0)
6205                 goto out;
6206         /*
6207          * Note: Server may do delete on close for this file
6208          *      in which case the getattr call will fail with
6209          *      an ESTALE error. Shouldn't be a problem,
6210          *      though, since fattr->valid will remain unset.
6211          */
6212         decode_getfattr(xdr, res->fattr, res->server);
6213 out:
6214         return status;
6215 }
6216
6217 /*
6218  * Decode OPEN response
6219  */
6220 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6221                              struct nfs_openres *res)
6222 {
6223         struct compound_hdr hdr;
6224         int status;
6225
6226         status = decode_compound_hdr(xdr, &hdr);
6227         if (status)
6228                 goto out;
6229         status = decode_sequence(xdr, &res->seq_res, rqstp);
6230         if (status)
6231                 goto out;
6232         status = decode_putfh(xdr);
6233         if (status)
6234                 goto out;
6235         status = decode_open(xdr, res);
6236         if (status)
6237                 goto out;
6238         if (decode_getfh(xdr, &res->fh) != 0)
6239                 goto out;
6240         decode_getfattr(xdr, res->f_attr, res->server);
6241 out:
6242         return status;
6243 }
6244
6245 /*
6246  * Decode OPEN_CONFIRM response
6247  */
6248 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6249                                      struct xdr_stream *xdr,
6250                                      struct nfs_open_confirmres *res)
6251 {
6252         struct compound_hdr hdr;
6253         int status;
6254
6255         status = decode_compound_hdr(xdr, &hdr);
6256         if (status)
6257                 goto out;
6258         status = decode_putfh(xdr);
6259         if (status)
6260                 goto out;
6261         status = decode_open_confirm(xdr, res);
6262 out:
6263         return status;
6264 }
6265
6266 /*
6267  * Decode OPEN response
6268  */
6269 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6270                                     struct xdr_stream *xdr,
6271                                     struct nfs_openres *res)
6272 {
6273         struct compound_hdr hdr;
6274         int status;
6275
6276         status = decode_compound_hdr(xdr, &hdr);
6277         if (status)
6278                 goto out;
6279         status = decode_sequence(xdr, &res->seq_res, rqstp);
6280         if (status)
6281                 goto out;
6282         status = decode_putfh(xdr);
6283         if (status)
6284                 goto out;
6285         status = decode_open(xdr, res);
6286         if (status)
6287                 goto out;
6288         decode_getfattr(xdr, res->f_attr, res->server);
6289 out:
6290         return status;
6291 }
6292
6293 /*
6294  * Decode SETATTR response
6295  */
6296 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6297                                 struct xdr_stream *xdr,
6298                                 struct nfs_setattrres *res)
6299 {
6300         struct compound_hdr hdr;
6301         int status;
6302
6303         status = decode_compound_hdr(xdr, &hdr);
6304         if (status)
6305                 goto out;
6306         status = decode_sequence(xdr, &res->seq_res, rqstp);
6307         if (status)
6308                 goto out;
6309         status = decode_putfh(xdr);
6310         if (status)
6311                 goto out;
6312         status = decode_setattr(xdr);
6313         if (status)
6314                 goto out;
6315         decode_getfattr(xdr, res->fattr, res->server);
6316 out:
6317         return status;
6318 }
6319
6320 /*
6321  * Decode LOCK response
6322  */
6323 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6324                              struct nfs_lock_res *res)
6325 {
6326         struct compound_hdr hdr;
6327         int status;
6328
6329         status = decode_compound_hdr(xdr, &hdr);
6330         if (status)
6331                 goto out;
6332         status = decode_sequence(xdr, &res->seq_res, rqstp);
6333         if (status)
6334                 goto out;
6335         status = decode_putfh(xdr);
6336         if (status)
6337                 goto out;
6338         status = decode_lock(xdr, res);
6339 out:
6340         return status;
6341 }
6342
6343 /*
6344  * Decode LOCKT response
6345  */
6346 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6347                               struct nfs_lockt_res *res)
6348 {
6349         struct compound_hdr hdr;
6350         int status;
6351
6352         status = decode_compound_hdr(xdr, &hdr);
6353         if (status)
6354                 goto out;
6355         status = decode_sequence(xdr, &res->seq_res, rqstp);
6356         if (status)
6357                 goto out;
6358         status = decode_putfh(xdr);
6359         if (status)
6360                 goto out;
6361         status = decode_lockt(xdr, res);
6362 out:
6363         return status;
6364 }
6365
6366 /*
6367  * Decode LOCKU response
6368  */
6369 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6370                               struct nfs_locku_res *res)
6371 {
6372         struct compound_hdr hdr;
6373         int status;
6374
6375         status = decode_compound_hdr(xdr, &hdr);
6376         if (status)
6377                 goto out;
6378         status = decode_sequence(xdr, &res->seq_res, rqstp);
6379         if (status)
6380                 goto out;
6381         status = decode_putfh(xdr);
6382         if (status)
6383                 goto out;
6384         status = decode_locku(xdr, res);
6385 out:
6386         return status;
6387 }
6388
6389 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6390                                           struct xdr_stream *xdr, void *dummy)
6391 {
6392         struct compound_hdr hdr;
6393         int status;
6394
6395         status = decode_compound_hdr(xdr, &hdr);
6396         if (!status)
6397                 status = decode_release_lockowner(xdr);
6398         return status;
6399 }
6400
6401 /*
6402  * Decode READLINK response
6403  */
6404 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6405                                  struct xdr_stream *xdr,
6406                                  struct nfs4_readlink_res *res)
6407 {
6408         struct compound_hdr hdr;
6409         int status;
6410
6411         status = decode_compound_hdr(xdr, &hdr);
6412         if (status)
6413                 goto out;
6414         status = decode_sequence(xdr, &res->seq_res, rqstp);
6415         if (status)
6416                 goto out;
6417         status = decode_putfh(xdr);
6418         if (status)
6419                 goto out;
6420         status = decode_readlink(xdr, rqstp);
6421 out:
6422         return status;
6423 }
6424
6425 /*
6426  * Decode READDIR response
6427  */
6428 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6429                                 struct nfs4_readdir_res *res)
6430 {
6431         struct compound_hdr hdr;
6432         int status;
6433
6434         status = decode_compound_hdr(xdr, &hdr);
6435         if (status)
6436                 goto out;
6437         status = decode_sequence(xdr, &res->seq_res, rqstp);
6438         if (status)
6439                 goto out;
6440         status = decode_putfh(xdr);
6441         if (status)
6442                 goto out;
6443         status = decode_readdir(xdr, rqstp, res);
6444 out:
6445         return status;
6446 }
6447
6448 /*
6449  * Decode Read response
6450  */
6451 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6452                              struct nfs_readres *res)
6453 {
6454         struct compound_hdr hdr;
6455         int status;
6456
6457         status = decode_compound_hdr(xdr, &hdr);
6458         if (status)
6459                 goto out;
6460         status = decode_sequence(xdr, &res->seq_res, rqstp);
6461         if (status)
6462                 goto out;
6463         status = decode_putfh(xdr);
6464         if (status)
6465                 goto out;
6466         status = decode_read(xdr, rqstp, res);
6467         if (!status)
6468                 status = res->count;
6469 out:
6470         return status;
6471 }
6472
6473 /*
6474  * Decode WRITE response
6475  */
6476 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6477                               struct nfs_writeres *res)
6478 {
6479         struct compound_hdr hdr;
6480         int status;
6481
6482         status = decode_compound_hdr(xdr, &hdr);
6483         if (status)
6484                 goto out;
6485         status = decode_sequence(xdr, &res->seq_res, rqstp);
6486         if (status)
6487                 goto out;
6488         status = decode_putfh(xdr);
6489         if (status)
6490                 goto out;
6491         status = decode_write(xdr, res);
6492         if (status)
6493                 goto out;
6494         if (res->fattr)
6495                 decode_getfattr(xdr, res->fattr, res->server);
6496         if (!status)
6497                 status = res->count;
6498 out:
6499         return status;
6500 }
6501
6502 /*
6503  * Decode COMMIT response
6504  */
6505 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6506                                struct nfs_commitres *res)
6507 {
6508         struct compound_hdr hdr;
6509         int status;
6510
6511         status = decode_compound_hdr(xdr, &hdr);
6512         if (status)
6513                 goto out;
6514         status = decode_sequence(xdr, &res->seq_res, rqstp);
6515         if (status)
6516                 goto out;
6517         status = decode_putfh(xdr);
6518         if (status)
6519                 goto out;
6520         status = decode_commit(xdr, res);
6521 out:
6522         return status;
6523 }
6524
6525 /*
6526  * Decode FSINFO response
6527  */
6528 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6529                                struct nfs4_fsinfo_res *res)
6530 {
6531         struct compound_hdr hdr;
6532         int status;
6533
6534         status = decode_compound_hdr(xdr, &hdr);
6535         if (!status)
6536                 status = decode_sequence(xdr, &res->seq_res, req);
6537         if (!status)
6538                 status = decode_putfh(xdr);
6539         if (!status)
6540                 status = decode_fsinfo(xdr, res->fsinfo);
6541         return status;
6542 }
6543
6544 /*
6545  * Decode PATHCONF response
6546  */
6547 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6548                                  struct nfs4_pathconf_res *res)
6549 {
6550         struct compound_hdr hdr;
6551         int status;
6552
6553         status = decode_compound_hdr(xdr, &hdr);
6554         if (!status)
6555                 status = decode_sequence(xdr, &res->seq_res, req);
6556         if (!status)
6557                 status = decode_putfh(xdr);
6558         if (!status)
6559                 status = decode_pathconf(xdr, res->pathconf);
6560         return status;
6561 }
6562
6563 /*
6564  * Decode STATFS response
6565  */
6566 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6567                                struct nfs4_statfs_res *res)
6568 {
6569         struct compound_hdr hdr;
6570         int status;
6571
6572         status = decode_compound_hdr(xdr, &hdr);
6573         if (!status)
6574                 status = decode_sequence(xdr, &res->seq_res, req);
6575         if (!status)
6576                 status = decode_putfh(xdr);
6577         if (!status)
6578                 status = decode_statfs(xdr, res->fsstat);
6579         return status;
6580 }
6581
6582 /*
6583  * Decode GETATTR_BITMAP response
6584  */
6585 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6586                                     struct xdr_stream *xdr,
6587                                     struct nfs4_server_caps_res *res)
6588 {
6589         struct compound_hdr hdr;
6590         int status;
6591
6592         status = decode_compound_hdr(xdr, &hdr);
6593         if (status)
6594                 goto out;
6595         status = decode_sequence(xdr, &res->seq_res, req);
6596         if (status)
6597                 goto out;
6598         status = decode_putfh(xdr);
6599         if (status)
6600                 goto out;
6601         status = decode_server_caps(xdr, res);
6602 out:
6603         return status;
6604 }
6605
6606 /*
6607  * Decode RENEW response
6608  */
6609 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6610                               void *__unused)
6611 {
6612         struct compound_hdr hdr;
6613         int status;
6614
6615         status = decode_compound_hdr(xdr, &hdr);
6616         if (!status)
6617                 status = decode_renew(xdr);
6618         return status;
6619 }
6620
6621 /*
6622  * Decode SETCLIENTID response
6623  */
6624 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6625                                     struct xdr_stream *xdr,
6626                                     struct nfs4_setclientid_res *res)
6627 {
6628         struct compound_hdr hdr;
6629         int status;
6630
6631         status = decode_compound_hdr(xdr, &hdr);
6632         if (!status)
6633                 status = decode_setclientid(xdr, res);
6634         return status;
6635 }
6636
6637 /*
6638  * Decode SETCLIENTID_CONFIRM response
6639  */
6640 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6641                                             struct xdr_stream *xdr,
6642                                             struct nfs_fsinfo *fsinfo)
6643 {
6644         struct compound_hdr hdr;
6645         int status;
6646
6647         status = decode_compound_hdr(xdr, &hdr);
6648         if (!status)
6649                 status = decode_setclientid_confirm(xdr);
6650         if (!status)
6651                 status = decode_putrootfh(xdr);
6652         if (!status)
6653                 status = decode_fsinfo(xdr, fsinfo);
6654         return status;
6655 }
6656
6657 /*
6658  * Decode DELEGRETURN response
6659  */
6660 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6661                                     struct xdr_stream *xdr,
6662                                     struct nfs4_delegreturnres *res)
6663 {
6664         struct compound_hdr hdr;
6665         int status;
6666
6667         status = decode_compound_hdr(xdr, &hdr);
6668         if (status)
6669                 goto out;
6670         status = decode_sequence(xdr, &res->seq_res, rqstp);
6671         if (status)
6672                 goto out;
6673         status = decode_putfh(xdr);
6674         if (status != 0)
6675                 goto out;
6676         status = decode_getfattr(xdr, res->fattr, res->server);
6677         if (status != 0)
6678                 goto out;
6679         status = decode_delegreturn(xdr);
6680 out:
6681         return status;
6682 }
6683
6684 /*
6685  * Decode FS_LOCATIONS response
6686  */
6687 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6688                                      struct xdr_stream *xdr,
6689                                      struct nfs4_fs_locations_res *res)
6690 {
6691         struct compound_hdr hdr;
6692         int status;
6693
6694         status = decode_compound_hdr(xdr, &hdr);
6695         if (status)
6696                 goto out;
6697         status = decode_sequence(xdr, &res->seq_res, req);
6698         if (status)
6699                 goto out;
6700         status = decode_putfh(xdr);
6701         if (status)
6702                 goto out;
6703         status = decode_lookup(xdr);
6704         if (status)
6705                 goto out;
6706         xdr_enter_page(xdr, PAGE_SIZE);
6707         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6708                                          NULL, res->fs_locations,
6709                                          res->fs_locations->server);
6710 out:
6711         return status;
6712 }
6713
6714 /*
6715  * Decode SECINFO response
6716  */
6717 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6718                                 struct xdr_stream *xdr,
6719                                 struct nfs4_secinfo_res *res)
6720 {
6721         struct compound_hdr hdr;
6722         int status;
6723
6724         status = decode_compound_hdr(xdr, &hdr);
6725         if (status)
6726                 goto out;
6727         status = decode_sequence(xdr, &res->seq_res, rqstp);
6728         if (status)
6729                 goto out;
6730         status = decode_putfh(xdr);
6731         if (status)
6732                 goto out;
6733         status = decode_secinfo(xdr, res);
6734 out:
6735         return status;
6736 }
6737
6738 #if defined(CONFIG_NFS_V4_1)
6739 /*
6740  * Decode BIND_CONN_TO_SESSION response
6741  */
6742 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6743                                         struct xdr_stream *xdr,
6744                                         void *res)
6745 {
6746         struct compound_hdr hdr;
6747         int status;
6748
6749         status = decode_compound_hdr(xdr, &hdr);
6750         if (!status)
6751                 status = decode_bind_conn_to_session(xdr, res);
6752         return status;
6753 }
6754
6755 /*
6756  * Decode EXCHANGE_ID response
6757  */
6758 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6759                                     struct xdr_stream *xdr,
6760                                     void *res)
6761 {
6762         struct compound_hdr hdr;
6763         int status;
6764
6765         status = decode_compound_hdr(xdr, &hdr);
6766         if (!status)
6767                 status = decode_exchange_id(xdr, res);
6768         return status;
6769 }
6770
6771 /*
6772  * Decode CREATE_SESSION response
6773  */
6774 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6775                                        struct xdr_stream *xdr,
6776                                        struct nfs41_create_session_res *res)
6777 {
6778         struct compound_hdr hdr;
6779         int status;
6780
6781         status = decode_compound_hdr(xdr, &hdr);
6782         if (!status)
6783                 status = decode_create_session(xdr, res);
6784         return status;
6785 }
6786
6787 /*
6788  * Decode DESTROY_SESSION response
6789  */
6790 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6791                                         struct xdr_stream *xdr,
6792                                         void *res)
6793 {
6794         struct compound_hdr hdr;
6795         int status;
6796
6797         status = decode_compound_hdr(xdr, &hdr);
6798         if (!status)
6799                 status = decode_destroy_session(xdr, res);
6800         return status;
6801 }
6802
6803 /*
6804  * Decode DESTROY_CLIENTID response
6805  */
6806 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6807                                         struct xdr_stream *xdr,
6808                                         void *res)
6809 {
6810         struct compound_hdr hdr;
6811         int status;
6812
6813         status = decode_compound_hdr(xdr, &hdr);
6814         if (!status)
6815                 status = decode_destroy_clientid(xdr, res);
6816         return status;
6817 }
6818
6819 /*
6820  * Decode SEQUENCE response
6821  */
6822 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6823                                  struct xdr_stream *xdr,
6824                                  struct nfs4_sequence_res *res)
6825 {
6826         struct compound_hdr hdr;
6827         int status;
6828
6829         status = decode_compound_hdr(xdr, &hdr);
6830         if (!status)
6831                 status = decode_sequence(xdr, res, rqstp);
6832         return status;
6833 }
6834
6835 /*
6836  * Decode GET_LEASE_TIME response
6837  */
6838 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6839                                        struct xdr_stream *xdr,
6840                                        struct nfs4_get_lease_time_res *res)
6841 {
6842         struct compound_hdr hdr;
6843         int status;
6844
6845         status = decode_compound_hdr(xdr, &hdr);
6846         if (!status)
6847                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6848         if (!status)
6849                 status = decode_putrootfh(xdr);
6850         if (!status)
6851                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6852         return status;
6853 }
6854
6855 /*
6856  * Decode RECLAIM_COMPLETE response
6857  */
6858 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6859                                          struct xdr_stream *xdr,
6860                                          struct nfs41_reclaim_complete_res *res)
6861 {
6862         struct compound_hdr hdr;
6863         int status;
6864
6865         status = decode_compound_hdr(xdr, &hdr);
6866         if (!status)
6867                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6868         if (!status)
6869                 status = decode_reclaim_complete(xdr, (void *)NULL);
6870         return status;
6871 }
6872
6873 /*
6874  * Decode GETDEVICELIST response
6875  */
6876 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6877                                       struct xdr_stream *xdr,
6878                                       struct nfs4_getdevicelist_res *res)
6879 {
6880         struct compound_hdr hdr;
6881         int status;
6882
6883         dprintk("encoding getdevicelist!\n");
6884
6885         status = decode_compound_hdr(xdr, &hdr);
6886         if (status != 0)
6887                 goto out;
6888         status = decode_sequence(xdr, &res->seq_res, rqstp);
6889         if (status != 0)
6890                 goto out;
6891         status = decode_putfh(xdr);
6892         if (status != 0)
6893                 goto out;
6894         status = decode_getdevicelist(xdr, res->devlist);
6895 out:
6896         return status;
6897 }
6898
6899 /*
6900  * Decode GETDEVINFO response
6901  */
6902 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6903                                       struct xdr_stream *xdr,
6904                                       struct nfs4_getdeviceinfo_res *res)
6905 {
6906         struct compound_hdr hdr;
6907         int status;
6908
6909         status = decode_compound_hdr(xdr, &hdr);
6910         if (status != 0)
6911                 goto out;
6912         status = decode_sequence(xdr, &res->seq_res, rqstp);
6913         if (status != 0)
6914                 goto out;
6915         status = decode_getdeviceinfo(xdr, res->pdev);
6916 out:
6917         return status;
6918 }
6919
6920 /*
6921  * Decode LAYOUTGET response
6922  */
6923 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6924                                   struct xdr_stream *xdr,
6925                                   struct nfs4_layoutget_res *res)
6926 {
6927         struct compound_hdr hdr;
6928         int status;
6929
6930         status = decode_compound_hdr(xdr, &hdr);
6931         if (status)
6932                 goto out;
6933         status = decode_sequence(xdr, &res->seq_res, rqstp);
6934         if (status)
6935                 goto out;
6936         status = decode_putfh(xdr);
6937         if (status)
6938                 goto out;
6939         status = decode_layoutget(xdr, rqstp, res);
6940 out:
6941         return status;
6942 }
6943
6944 /*
6945  * Decode LAYOUTRETURN response
6946  */
6947 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6948                                      struct xdr_stream *xdr,
6949                                      struct nfs4_layoutreturn_res *res)
6950 {
6951         struct compound_hdr hdr;
6952         int status;
6953
6954         status = decode_compound_hdr(xdr, &hdr);
6955         if (status)
6956                 goto out;
6957         status = decode_sequence(xdr, &res->seq_res, rqstp);
6958         if (status)
6959                 goto out;
6960         status = decode_putfh(xdr);
6961         if (status)
6962                 goto out;
6963         status = decode_layoutreturn(xdr, res);
6964 out:
6965         return status;
6966 }
6967
6968 /*
6969  * Decode LAYOUTCOMMIT response
6970  */
6971 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6972                                      struct xdr_stream *xdr,
6973                                      struct nfs4_layoutcommit_res *res)
6974 {
6975         struct compound_hdr hdr;
6976         int status;
6977
6978         status = decode_compound_hdr(xdr, &hdr);
6979         if (status)
6980                 goto out;
6981         status = decode_sequence(xdr, &res->seq_res, rqstp);
6982         if (status)
6983                 goto out;
6984         status = decode_putfh(xdr);
6985         if (status)
6986                 goto out;
6987         status = decode_layoutcommit(xdr, rqstp, res);
6988         if (status)
6989                 goto out;
6990         decode_getfattr(xdr, res->fattr, res->server);
6991 out:
6992         return status;
6993 }
6994
6995 /*
6996  * Decode SECINFO_NO_NAME response
6997  */
6998 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
6999                                         struct xdr_stream *xdr,
7000                                         struct nfs4_secinfo_res *res)
7001 {
7002         struct compound_hdr hdr;
7003         int status;
7004
7005         status = decode_compound_hdr(xdr, &hdr);
7006         if (status)
7007                 goto out;
7008         status = decode_sequence(xdr, &res->seq_res, rqstp);
7009         if (status)
7010                 goto out;
7011         status = decode_putrootfh(xdr);
7012         if (status)
7013                 goto out;
7014         status = decode_secinfo_no_name(xdr, res);
7015 out:
7016         return status;
7017 }
7018
7019 /*
7020  * Decode TEST_STATEID response
7021  */
7022 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7023                                      struct xdr_stream *xdr,
7024                                      struct nfs41_test_stateid_res *res)
7025 {
7026         struct compound_hdr hdr;
7027         int status;
7028
7029         status = decode_compound_hdr(xdr, &hdr);
7030         if (status)
7031                 goto out;
7032         status = decode_sequence(xdr, &res->seq_res, rqstp);
7033         if (status)
7034                 goto out;
7035         status = decode_test_stateid(xdr, res);
7036 out:
7037         return status;
7038 }
7039
7040 /*
7041  * Decode FREE_STATEID response
7042  */
7043 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7044                                      struct xdr_stream *xdr,
7045                                      struct nfs41_free_stateid_res *res)
7046 {
7047         struct compound_hdr hdr;
7048         int status;
7049
7050         status = decode_compound_hdr(xdr, &hdr);
7051         if (status)
7052                 goto out;
7053         status = decode_sequence(xdr, &res->seq_res, rqstp);
7054         if (status)
7055                 goto out;
7056         status = decode_free_stateid(xdr, res);
7057 out:
7058         return status;
7059 }
7060 #endif /* CONFIG_NFS_V4_1 */
7061
7062 /**
7063  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7064  *                      the local page cache.
7065  * @xdr: XDR stream where entry resides
7066  * @entry: buffer to fill in with entry data
7067  * @plus: boolean indicating whether this should be a readdirplus entry
7068  *
7069  * Returns zero if successful, otherwise a negative errno value is
7070  * returned.
7071  *
7072  * This function is not invoked during READDIR reply decoding, but
7073  * rather whenever an application invokes the getdents(2) system call
7074  * on a directory already in our cache.
7075  */
7076 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7077                        int plus)
7078 {
7079         unsigned int savep;
7080         uint32_t bitmap[3] = {0};
7081         uint32_t len;
7082         __be32 *p = xdr_inline_decode(xdr, 4);
7083         if (unlikely(!p))
7084                 goto out_overflow;
7085         if (*p == xdr_zero) {
7086                 p = xdr_inline_decode(xdr, 4);
7087                 if (unlikely(!p))
7088                         goto out_overflow;
7089                 if (*p == xdr_zero)
7090                         return -EAGAIN;
7091                 entry->eof = 1;
7092                 return -EBADCOOKIE;
7093         }
7094
7095         p = xdr_inline_decode(xdr, 12);
7096         if (unlikely(!p))
7097                 goto out_overflow;
7098         entry->prev_cookie = entry->cookie;
7099         p = xdr_decode_hyper(p, &entry->cookie);
7100         entry->len = be32_to_cpup(p);
7101
7102         p = xdr_inline_decode(xdr, entry->len);
7103         if (unlikely(!p))
7104                 goto out_overflow;
7105         entry->name = (const char *) p;
7106
7107         /*
7108          * In case the server doesn't return an inode number,
7109          * we fake one here.  (We don't use inode number 0,
7110          * since glibc seems to choke on it...)
7111          */
7112         entry->ino = 1;
7113         entry->fattr->valid = 0;
7114
7115         if (decode_attr_bitmap(xdr, bitmap) < 0)
7116                 goto out_overflow;
7117
7118         if (decode_attr_length(xdr, &len, &savep) < 0)
7119                 goto out_overflow;
7120
7121         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7122                                   NULL, entry->server) < 0)
7123                 goto out_overflow;
7124         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7125                 entry->ino = entry->fattr->mounted_on_fileid;
7126         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7127                 entry->ino = entry->fattr->fileid;
7128
7129         entry->d_type = DT_UNKNOWN;
7130         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7131                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7132
7133         return 0;
7134
7135 out_overflow:
7136         print_overflow_msg(__func__, xdr);
7137         return -EAGAIN;
7138 }
7139
7140 /*
7141  * We need to translate between nfs status return values and
7142  * the local errno values which may not be the same.
7143  */
7144 static struct {
7145         int stat;
7146         int errno;
7147 } nfs_errtbl[] = {
7148         { NFS4_OK,              0               },
7149         { NFS4ERR_PERM,         -EPERM          },
7150         { NFS4ERR_NOENT,        -ENOENT         },
7151         { NFS4ERR_IO,           -errno_NFSERR_IO},
7152         { NFS4ERR_NXIO,         -ENXIO          },
7153         { NFS4ERR_ACCESS,       -EACCES         },
7154         { NFS4ERR_EXIST,        -EEXIST         },
7155         { NFS4ERR_XDEV,         -EXDEV          },
7156         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7157         { NFS4ERR_ISDIR,        -EISDIR         },
7158         { NFS4ERR_INVAL,        -EINVAL         },
7159         { NFS4ERR_FBIG,         -EFBIG          },
7160         { NFS4ERR_NOSPC,        -ENOSPC         },
7161         { NFS4ERR_ROFS,         -EROFS          },
7162         { NFS4ERR_MLINK,        -EMLINK         },
7163         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7164         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7165         { NFS4ERR_DQUOT,        -EDQUOT         },
7166         { NFS4ERR_STALE,        -ESTALE         },
7167         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7168         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7169         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7170         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7171         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7172         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7173         { NFS4ERR_LOCKED,       -EAGAIN         },
7174         { NFS4ERR_SYMLINK,      -ELOOP          },
7175         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7176         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7177         { -1,                   -EIO            }
7178 };
7179
7180 /*
7181  * Convert an NFS error code to a local one.
7182  * This one is used jointly by NFSv2 and NFSv3.
7183  */
7184 static int
7185 nfs4_stat_to_errno(int stat)
7186 {
7187         int i;
7188         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7189                 if (nfs_errtbl[i].stat == stat)
7190                         return nfs_errtbl[i].errno;
7191         }
7192         if (stat <= 10000 || stat > 10100) {
7193                 /* The server is looney tunes. */
7194                 return -EREMOTEIO;
7195         }
7196         /* If we cannot translate the error, the recovery routines should
7197          * handle it.
7198          * Note: remaining NFSv4 error codes have values > 10000, so should
7199          * not conflict with native Linux error codes.
7200          */
7201         return -stat;
7202 }
7203
7204 #define PROC(proc, argtype, restype)                            \
7205 [NFSPROC4_CLNT_##proc] = {                                      \
7206         .p_proc   = NFSPROC4_COMPOUND,                          \
7207         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7208         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7209         .p_arglen = NFS4_##argtype##_sz,                        \
7210         .p_replen = NFS4_##restype##_sz,                        \
7211         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7212         .p_name   = #proc,                                      \
7213 }
7214
7215 struct rpc_procinfo     nfs4_procedures[] = {
7216         PROC(READ,              enc_read,               dec_read),
7217         PROC(WRITE,             enc_write,              dec_write),
7218         PROC(COMMIT,            enc_commit,             dec_commit),
7219         PROC(OPEN,              enc_open,               dec_open),
7220         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7221         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7222         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7223         PROC(CLOSE,             enc_close,              dec_close),
7224         PROC(SETATTR,           enc_setattr,            dec_setattr),
7225         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7226         PROC(RENEW,             enc_renew,              dec_renew),
7227         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7228         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7229         PROC(LOCK,              enc_lock,               dec_lock),
7230         PROC(LOCKT,             enc_lockt,              dec_lockt),
7231         PROC(LOCKU,             enc_locku,              dec_locku),
7232         PROC(ACCESS,            enc_access,             dec_access),
7233         PROC(GETATTR,           enc_getattr,            dec_getattr),
7234         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7235         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7236         PROC(REMOVE,            enc_remove,             dec_remove),
7237         PROC(RENAME,            enc_rename,             dec_rename),
7238         PROC(LINK,              enc_link,               dec_link),
7239         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7240         PROC(CREATE,            enc_create,             dec_create),
7241         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7242         PROC(STATFS,            enc_statfs,             dec_statfs),
7243         PROC(READLINK,          enc_readlink,           dec_readlink),
7244         PROC(READDIR,           enc_readdir,            dec_readdir),
7245         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7246         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7247         PROC(GETACL,            enc_getacl,             dec_getacl),
7248         PROC(SETACL,            enc_setacl,             dec_setacl),
7249         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7250         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7251         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7252 #if defined(CONFIG_NFS_V4_1)
7253         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7254         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7255         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7256         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7257         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7258         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7259         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7260         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7261         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7262         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7263         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7264         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7265         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7266         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7267         PROC(BIND_CONN_TO_SESSION,
7268                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7269         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7270 #endif /* CONFIG_NFS_V4_1 */
7271 };
7272
7273 const struct rpc_version nfs_version4 = {
7274         .number                 = 4,
7275         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7276         .procs                  = nfs4_procedures
7277 };
7278
7279 /*
7280  * Local variables:
7281  *  c-basic-offset: 8
7282  * End:
7283  */