fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/nfs_idmap.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "internal.h"
  59 #include "nfs4session.h"
  60 #include "pnfs.h"
  61 #include "netns.h"
  62
  63 #define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65 /* Mapping from NFS error code to "errno" error code. */
  66 #define errno_NFSERR_IO         EIO
  67
  68 static int nfs4_stat_to_errno(int);
  69
  70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71 #ifdef DEBUG
  72 #define NFS4_MAXTAGLEN          20
  73 #else
  74 #define NFS4_MAXTAGLEN          0
  75 #endif
  76
  77 /* lock,open owner id:
  78  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79  */
  80 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81 #define lock_owner_id_maxsz     (1 + 1 + 4)
  82 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define op_encode_hdr_maxsz     (1)
  86 #define op_decode_hdr_maxsz     (2)
  87 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                 (NFS4_FHSIZE >> 2))
  93 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                 ((3+NFS4_FHSIZE) >> 2))
  99 #define nfs4_fattr_bitmap_maxsz 4
 100 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 /* We support only one layout type per file system */
 106 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 107 /* This is based on getfattr, which uses the most attributes: */
 108 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 109                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 110                                 nfs4_group_maxsz + decode_mdsthreshold_maxsz))
 111 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 112                                 nfs4_fattr_value_maxsz)
 113 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 114 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 115                                  1 + 2 + 1 + \
 116                                 nfs4_owner_maxsz + \
 117                                 nfs4_group_maxsz + \
 118                                 4 + 4)
 119 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 120 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 121 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 122 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 123 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 124 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 125  * layout types will be returned.
 126  */
 127 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 128                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 129 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 130 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 131 #define encode_setclientid_maxsz \
 132                                 (op_encode_hdr_maxsz + \
 133                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 134                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 135                                 1 /* sc_prog */ + \
 136                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 137                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 138                                 1) /* sc_cb_ident */
 139 #define decode_setclientid_maxsz \
 140                                 (op_decode_hdr_maxsz + \
 141                                 2 + \
 142                                 1024) /* large value for CLID_INUSE */
 143 #define encode_setclientid_confirm_maxsz \
 144                                 (op_encode_hdr_maxsz + \
 145                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 146 #define decode_setclientid_confirm_maxsz \
 147                                 (op_decode_hdr_maxsz)
 148 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 149 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 150 #define encode_share_access_maxsz \
 151                                 (2)
 152 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 153 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 154 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 155 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 156                                 2 + encode_share_access_maxsz + 2 + \
 157                                 open_owner_id_maxsz + \
 158                                 encode_opentype_maxsz + \
 159                                 encode_claim_null_maxsz)
 160 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 161 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 162                                 decode_ace_maxsz)
 163 #define decode_change_info_maxsz        (5)
 164 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 165                                 decode_stateid_maxsz + \
 166                                 decode_change_info_maxsz + 1 + \
 167                                 nfs4_fattr_bitmap_maxsz + \
 168                                 decode_delegation_maxsz)
 169 #define encode_open_confirm_maxsz \
 170                                 (op_encode_hdr_maxsz + \
 171                                  encode_stateid_maxsz + 1)
 172 #define decode_open_confirm_maxsz \
 173                                 (op_decode_hdr_maxsz + \
 174                                  decode_stateid_maxsz)
 175 #define encode_open_downgrade_maxsz \
 176                                 (op_encode_hdr_maxsz + \
 177                                  encode_stateid_maxsz + 1 + \
 178                                  encode_share_access_maxsz)
 179 #define decode_open_downgrade_maxsz \
 180                                 (op_decode_hdr_maxsz + \
 181                                  decode_stateid_maxsz)
 182 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 183                                  1 + encode_stateid_maxsz)
 184 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 185                                  decode_stateid_maxsz)
 186 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + \
 188                                  encode_attrs_maxsz)
 189 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 190                                  nfs4_fattr_bitmap_maxsz)
 191 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 192                                  encode_stateid_maxsz + 3)
 193 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 194 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 195                                  2 + encode_verifier_maxsz + 5)
 196 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 197                                  decode_verifier_maxsz)
 198 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 199 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 200 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 201                                  encode_stateid_maxsz + 4)
 202 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 203                                  2 + decode_verifier_maxsz)
 204 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 205 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 206                                  decode_verifier_maxsz)
 207 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 208                                 nfs4_name_maxsz)
 209 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 210                                  decode_change_info_maxsz)
 211 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 212                                 2 * nfs4_name_maxsz)
 213 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 214                                  decode_change_info_maxsz + \
 215                                  decode_change_info_maxsz)
 216 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 217                                 nfs4_name_maxsz)
 218 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 219 #define encode_lockowner_maxsz  (7)
 220 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 221                                  7 + \
 222                                  1 + encode_stateid_maxsz + 1 + \
 223                                  encode_lockowner_maxsz)
 224 #define decode_lock_denied_maxsz \
 225                                 (8 + decode_lockowner_maxsz)
 226 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 227                                  decode_lock_denied_maxsz)
 228 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 229                                 encode_lockowner_maxsz)
 230 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 231                                  decode_lock_denied_maxsz)
 232 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 233                                  encode_stateid_maxsz + \
 234                                  4)
 235 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 236                                  decode_stateid_maxsz)
 237 #define encode_release_lockowner_maxsz \
 238                                 (op_encode_hdr_maxsz + \
 239                                  encode_lockowner_maxsz)
 240 #define decode_release_lockowner_maxsz \
 241                                 (op_decode_hdr_maxsz)
 242 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 243 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 244 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 245                                 1 + nfs4_name_maxsz + \
 246                                 1 + \
 247                                 nfs4_fattr_maxsz)
 248 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 249 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 250                                 1 + 2 + nfs4_name_maxsz + \
 251                                 encode_attrs_maxsz)
 252 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 253                                 decode_change_info_maxsz + \
 254                                 nfs4_fattr_bitmap_maxsz)
 255 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 256 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 257 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 258 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 259 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 260 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 261                                  nfs4_fattr_bitmap_maxsz + 1)
 262 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 263                                  encode_stateid_maxsz + 3)
 264 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 265 #define encode_fs_locations_maxsz \
 266                                 (encode_getattr_maxsz)
 267 #define decode_fs_locations_maxsz \
 268                                 (0)
 269 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 270 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 271
 272 #if defined(CONFIG_NFS_V4_1)
 273 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 274 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 275                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 276
 277 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 278                                 encode_verifier_maxsz + \
 279                                 1 /* co_ownerid.len */ + \
 280                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 281                                 1 /* flags */ + \
 282                                 1 /* spa_how */ + \
 283                                 0 /* SP4_NONE (for now) */ + \
 284                                 1 /* implementation id array of size 1 */ + \
 285                                 1 /* nii_domain */ + \
 286                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 287                                 1 /* nii_name */ + \
 288                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 289                                 3 /* nii_date */)
 290 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 291                                 2 /* eir_clientid */ + \
 292                                 1 /* eir_sequenceid */ + \
 293                                 1 /* eir_flags */ + \
 294                                 1 /* spr_how */ + \
 295                                 0 /* SP4_NONE (for now) */ + \
 296                                 2 /* eir_server_owner.so_minor_id */ + \
 297                                 /* eir_server_owner.so_major_id<> */ \
 298                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 299                                 /* eir_server_scope<> */ \
 300                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 301                                 1 /* eir_server_impl_id array length */ + \
 302                                 1 /* nii_domain */ + \
 303                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 304                                 1 /* nii_name */ + \
 305                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 306                                 3 /* nii_date */)
 307 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 308 #define decode_channel_attrs_maxsz  (6 + \
 309                                      1 /* ca_rdma_ird.len */ + \
 310                                      1 /* ca_rdma_ird */)
 311 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 312                                      2 /* csa_clientid */ + \
 313                                      1 /* csa_sequence */ + \
 314                                      1 /* csa_flags */ + \
 315                                      encode_channel_attrs_maxsz + \
 316                                      encode_channel_attrs_maxsz + \
 317                                      1 /* csa_cb_program */ + \
 318                                      1 /* csa_sec_parms.len (1) */ + \
 319                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 320                                      1 /* stamp */ + \
 321                                      1 /* machinename.len */ + \
 322                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 323                                      1 /* uid */ + \
 324                                      1 /* gid */ + \
 325                                      1 /* gids.len (0) */)
 326 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 327                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 328                                      1 /* csr_sequence */ + \
 329                                      1 /* csr_flags */ + \
 330                                      decode_channel_attrs_maxsz + \
 331                                      decode_channel_attrs_maxsz)
 332 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 333                                      /* bctsa_sessid */ \
 334                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 335                                      1 /* bctsa_dir */ + \
 336                                      1 /* bctsa_use_conn_in_rdma_mode */)
 337 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 338                                      /* bctsr_sessid */ \
 339                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 340                                      1 /* bctsr_dir */ + \
 341                                      1 /* bctsr_use_conn_in_rdma_mode */)
 342 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 343 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 344 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 345 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 346 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 347                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 348 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 349                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 350 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 351 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 352 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 353                                 encode_verifier_maxsz)
 354 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 355                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 356                                 decode_verifier_maxsz \
 357                                   /* verifier4 gdlr_verifier */ + \
 358                                 1 /* gdlr_deviceid_list count */ + \
 359                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 360                                             NFS4_DEVICEID4_SIZE) \
 361                                   /* gdlr_deviceid_list */ + \
 362                                 1 /* bool gdlr_eof */)
 363 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 364                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 365 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 366                                 1 /* layout type */ + \
 367                                 1 /* opaque devaddr4 length */ + \
 368                                   /* devaddr4 payload is read into page */ \
 369                                 1 /* notification bitmap length */ + \
 370                                 1 /* notification bitmap */)
 371 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 372                                 encode_stateid_maxsz)
 373 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 374                                 decode_stateid_maxsz + \
 375                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 376 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 377                                 2 /* offset */ + \
 378                                 2 /* length */ + \
 379                                 1 /* reclaim */ + \
 380                                 encode_stateid_maxsz + \
 381                                 1 /* new offset (true) */ + \
 382                                 2 /* last byte written */ + \
 383                                 1 /* nt_timechanged (false) */ + \
 384                                 1 /* layoutupdate4 layout type */ + \
 385                                 1 /* NULL filelayout layoutupdate4 payload */)
 386 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 387 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 388                                 encode_stateid_maxsz + \
 389                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 390 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 391                                 1 + decode_stateid_maxsz)
 392 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 393 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 394 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 395                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 396 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 397 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 398                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 399 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz + 1)
 400 #else /* CONFIG_NFS_V4_1 */
 401 #define encode_sequence_maxsz   0
 402 #define decode_sequence_maxsz   0
 403 #endif /* CONFIG_NFS_V4_1 */
 404
 405 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 406 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 407 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 408                                 encode_sequence_maxsz + \
 409                                 encode_putfh_maxsz + \
 410                                 encode_read_maxsz)
 411 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 412                                 decode_sequence_maxsz + \
 413                                 decode_putfh_maxsz + \
 414                                 decode_read_maxsz)
 415 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 416                                 encode_sequence_maxsz + \
 417                                 encode_putfh_maxsz + \
 418                                 encode_readlink_maxsz)
 419 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 420                                 decode_sequence_maxsz + \
 421                                 decode_putfh_maxsz + \
 422                                 decode_readlink_maxsz)
 423 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 424                                 encode_sequence_maxsz + \
 425                                 encode_putfh_maxsz + \
 426                                 encode_readdir_maxsz)
 427 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 428                                 decode_sequence_maxsz + \
 429                                 decode_putfh_maxsz + \
 430                                 decode_readdir_maxsz)
 431 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 432                                 encode_sequence_maxsz + \
 433                                 encode_putfh_maxsz + \
 434                                 encode_write_maxsz + \
 435                                 encode_getattr_maxsz)
 436 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 437                                 decode_sequence_maxsz + \
 438                                 decode_putfh_maxsz + \
 439                                 decode_write_maxsz + \
 440                                 decode_getattr_maxsz)
 441 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_commit_maxsz)
 445 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 446                                 decode_sequence_maxsz + \
 447                                 decode_putfh_maxsz + \
 448                                 decode_commit_maxsz)
 449 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 450                                 encode_sequence_maxsz + \
 451                                 encode_putfh_maxsz + \
 452                                 encode_open_maxsz + \
 453                                 encode_access_maxsz + \
 454                                 encode_getfh_maxsz + \
 455                                 encode_getattr_maxsz)
 456 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 457                                 decode_sequence_maxsz + \
 458                                 decode_putfh_maxsz + \
 459                                 decode_open_maxsz + \
 460                                 decode_access_maxsz + \
 461                                 decode_getfh_maxsz + \
 462                                 decode_getattr_maxsz)
 463 #define NFS4_enc_open_confirm_sz \
 464                                 (compound_encode_hdr_maxsz + \
 465                                  encode_putfh_maxsz + \
 466                                  encode_open_confirm_maxsz)
 467 #define NFS4_dec_open_confirm_sz \
 468                                 (compound_decode_hdr_maxsz + \
 469                                  decode_putfh_maxsz + \
 470                                  decode_open_confirm_maxsz)
 471 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 472                                         encode_sequence_maxsz + \
 473                                         encode_putfh_maxsz + \
 474                                         encode_open_maxsz + \
 475                                         encode_access_maxsz + \
 476                                         encode_getattr_maxsz)
 477 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 478                                         decode_sequence_maxsz + \
 479                                         decode_putfh_maxsz + \
 480                                         decode_open_maxsz + \
 481                                         decode_access_maxsz + \
 482                                         decode_getattr_maxsz)
 483 #define NFS4_enc_open_downgrade_sz \
 484                                 (compound_encode_hdr_maxsz + \
 485                                  encode_sequence_maxsz + \
 486                                  encode_putfh_maxsz + \
 487                                  encode_open_downgrade_maxsz + \
 488                                  encode_getattr_maxsz)
 489 #define NFS4_dec_open_downgrade_sz \
 490                                 (compound_decode_hdr_maxsz + \
 491                                  decode_sequence_maxsz + \
 492                                  decode_putfh_maxsz + \
 493                                  decode_open_downgrade_maxsz + \
 494                                  decode_getattr_maxsz)
 495 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 496                                  encode_sequence_maxsz + \
 497                                  encode_putfh_maxsz + \
 498                                  encode_close_maxsz + \
 499                                  encode_getattr_maxsz)
 500 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 501                                  decode_sequence_maxsz + \
 502                                  decode_putfh_maxsz + \
 503                                  decode_close_maxsz + \
 504                                  decode_getattr_maxsz)
 505 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 506                                  encode_sequence_maxsz + \
 507                                  encode_putfh_maxsz + \
 508                                  encode_setattr_maxsz + \
 509                                  encode_getattr_maxsz)
 510 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 511                                  decode_sequence_maxsz + \
 512                                  decode_putfh_maxsz + \
 513                                  decode_setattr_maxsz + \
 514                                  decode_getattr_maxsz)
 515 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 516                                 encode_sequence_maxsz + \
 517                                 encode_putfh_maxsz + \
 518                                 encode_fsinfo_maxsz)
 519 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 520                                 decode_sequence_maxsz + \
 521                                 decode_putfh_maxsz + \
 522                                 decode_fsinfo_maxsz)
 523 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 524                                 encode_renew_maxsz)
 525 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 526                                 decode_renew_maxsz)
 527 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 528                                 encode_setclientid_maxsz)
 529 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 530                                 decode_setclientid_maxsz)
 531 #define NFS4_enc_setclientid_confirm_sz \
 532                                 (compound_encode_hdr_maxsz + \
 533                                 encode_setclientid_confirm_maxsz)
 534 #define NFS4_dec_setclientid_confirm_sz \
 535                                 (compound_decode_hdr_maxsz + \
 536                                 decode_setclientid_confirm_maxsz)
 537 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 538                                 encode_sequence_maxsz + \
 539                                 encode_putfh_maxsz + \
 540                                 encode_lock_maxsz)
 541 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 542                                 decode_sequence_maxsz + \
 543                                 decode_putfh_maxsz + \
 544                                 decode_lock_maxsz)
 545 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 546                                 encode_sequence_maxsz + \
 547                                 encode_putfh_maxsz + \
 548                                 encode_lockt_maxsz)
 549 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 550                                  decode_sequence_maxsz + \
 551                                  decode_putfh_maxsz + \
 552                                  decode_lockt_maxsz)
 553 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 554                                 encode_sequence_maxsz + \
 555                                 encode_putfh_maxsz + \
 556                                 encode_locku_maxsz)
 557 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 558                                 decode_sequence_maxsz + \
 559                                 decode_putfh_maxsz + \
 560                                 decode_locku_maxsz)
 561 #define NFS4_enc_release_lockowner_sz \
 562                                 (compound_encode_hdr_maxsz + \
 563                                  encode_lockowner_maxsz)
 564 #define NFS4_dec_release_lockowner_sz \
 565                                 (compound_decode_hdr_maxsz + \
 566                                  decode_lockowner_maxsz)
 567 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_access_maxsz + \
 571                                 encode_getattr_maxsz)
 572 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 573                                 decode_sequence_maxsz + \
 574                                 decode_putfh_maxsz + \
 575                                 decode_access_maxsz + \
 576                                 decode_getattr_maxsz)
 577 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 578                                 encode_sequence_maxsz + \
 579                                 encode_putfh_maxsz + \
 580                                 encode_getattr_maxsz)
 581 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 582                                 decode_sequence_maxsz + \
 583                                 decode_putfh_maxsz + \
 584                                 decode_getattr_maxsz)
 585 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 586                                 encode_sequence_maxsz + \
 587                                 encode_putfh_maxsz + \
 588                                 encode_lookup_maxsz + \
 589                                 encode_getattr_maxsz + \
 590                                 encode_getfh_maxsz)
 591 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 592                                 decode_sequence_maxsz + \
 593                                 decode_putfh_maxsz + \
 594                                 decode_lookup_maxsz + \
 595                                 decode_getattr_maxsz + \
 596                                 decode_getfh_maxsz)
 597 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 598                                 encode_sequence_maxsz + \
 599                                 encode_putrootfh_maxsz + \
 600                                 encode_getattr_maxsz + \
 601                                 encode_getfh_maxsz)
 602 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 603                                 decode_sequence_maxsz + \
 604                                 decode_putrootfh_maxsz + \
 605                                 decode_getattr_maxsz + \
 606                                 decode_getfh_maxsz)
 607 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_remove_maxsz)
 611 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 612                                 decode_sequence_maxsz + \
 613                                 decode_putfh_maxsz + \
 614                                 decode_remove_maxsz)
 615 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 616                                 encode_sequence_maxsz + \
 617                                 encode_putfh_maxsz + \
 618                                 encode_savefh_maxsz + \
 619                                 encode_putfh_maxsz + \
 620                                 encode_rename_maxsz)
 621 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 622                                 decode_sequence_maxsz + \
 623                                 decode_putfh_maxsz + \
 624                                 decode_savefh_maxsz + \
 625                                 decode_putfh_maxsz + \
 626                                 decode_rename_maxsz)
 627 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 628                                 encode_sequence_maxsz + \
 629                                 encode_putfh_maxsz + \
 630                                 encode_savefh_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_link_maxsz + \
 633                                 encode_restorefh_maxsz + \
 634                                 encode_getattr_maxsz)
 635 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 636                                 decode_sequence_maxsz + \
 637                                 decode_putfh_maxsz + \
 638                                 decode_savefh_maxsz + \
 639                                 decode_putfh_maxsz + \
 640                                 decode_link_maxsz + \
 641                                 decode_restorefh_maxsz + \
 642                                 decode_getattr_maxsz)
 643 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 644                                 encode_sequence_maxsz + \
 645                                 encode_putfh_maxsz + \
 646                                 encode_symlink_maxsz + \
 647                                 encode_getattr_maxsz + \
 648                                 encode_getfh_maxsz)
 649 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 650                                 decode_sequence_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_symlink_maxsz + \
 653                                 decode_getattr_maxsz + \
 654                                 decode_getfh_maxsz)
 655 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 656                                 encode_sequence_maxsz + \
 657                                 encode_putfh_maxsz + \
 658                                 encode_create_maxsz + \
 659                                 encode_getfh_maxsz + \
 660                                 encode_getattr_maxsz)
 661 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 662                                 decode_sequence_maxsz + \
 663                                 decode_putfh_maxsz + \
 664                                 decode_create_maxsz + \
 665                                 decode_getfh_maxsz + \
 666                                 decode_getattr_maxsz)
 667 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 668                                 encode_sequence_maxsz + \
 669                                 encode_putfh_maxsz + \
 670                                 encode_getattr_maxsz)
 671 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 672                                 decode_sequence_maxsz + \
 673                                 decode_putfh_maxsz + \
 674                                 decode_getattr_maxsz)
 675 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 676                                 encode_sequence_maxsz + \
 677                                 encode_putfh_maxsz + \
 678                                 encode_statfs_maxsz)
 679 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 680                                 decode_sequence_maxsz + \
 681                                 decode_putfh_maxsz + \
 682                                 decode_statfs_maxsz)
 683 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 684                                 encode_sequence_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_getattr_maxsz)
 687 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 688                                 decode_sequence_maxsz + \
 689                                 decode_putfh_maxsz + \
 690                                 decode_getattr_maxsz)
 691 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 692                                 encode_sequence_maxsz + \
 693                                 encode_putfh_maxsz + \
 694                                 encode_delegreturn_maxsz + \
 695                                 encode_getattr_maxsz)
 696 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 697                                 decode_sequence_maxsz + \
 698                                 decode_delegreturn_maxsz + \
 699                                 decode_getattr_maxsz)
 700 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 701                                 encode_sequence_maxsz + \
 702                                 encode_putfh_maxsz + \
 703                                 encode_getacl_maxsz)
 704 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 705                                 decode_sequence_maxsz + \
 706                                 decode_putfh_maxsz + \
 707                                 decode_getacl_maxsz)
 708 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 709                                 encode_sequence_maxsz + \
 710                                 encode_putfh_maxsz + \
 711                                 encode_setacl_maxsz)
 712 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 713                                 decode_sequence_maxsz + \
 714                                 decode_putfh_maxsz + \
 715                                 decode_setacl_maxsz)
 716 #define NFS4_enc_fs_locations_sz \
 717                                 (compound_encode_hdr_maxsz + \
 718                                  encode_sequence_maxsz + \
 719                                  encode_putfh_maxsz + \
 720                                  encode_lookup_maxsz + \
 721                                  encode_fs_locations_maxsz)
 722 #define NFS4_dec_fs_locations_sz \
 723                                 (compound_decode_hdr_maxsz + \
 724                                  decode_sequence_maxsz + \
 725                                  decode_putfh_maxsz + \
 726                                  decode_lookup_maxsz + \
 727                                  decode_fs_locations_maxsz)
 728 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 729                                 encode_sequence_maxsz + \
 730                                 encode_putfh_maxsz + \
 731                                 encode_secinfo_maxsz)
 732 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 733                                 decode_sequence_maxsz + \
 734                                 decode_putfh_maxsz + \
 735                                 decode_secinfo_maxsz)
 736 #if defined(CONFIG_NFS_V4_1)
 737 #define NFS4_enc_bind_conn_to_session_sz \
 738                                 (compound_encode_hdr_maxsz + \
 739                                  encode_bind_conn_to_session_maxsz)
 740 #define NFS4_dec_bind_conn_to_session_sz \
 741                                 (compound_decode_hdr_maxsz + \
 742                                  decode_bind_conn_to_session_maxsz)
 743 #define NFS4_enc_exchange_id_sz \
 744                                 (compound_encode_hdr_maxsz + \
 745                                  encode_exchange_id_maxsz)
 746 #define NFS4_dec_exchange_id_sz \
 747                                 (compound_decode_hdr_maxsz + \
 748                                  decode_exchange_id_maxsz)
 749 #define NFS4_enc_create_session_sz \
 750                                 (compound_encode_hdr_maxsz + \
 751                                  encode_create_session_maxsz)
 752 #define NFS4_dec_create_session_sz \
 753                                 (compound_decode_hdr_maxsz + \
 754                                  decode_create_session_maxsz)
 755 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 756                                          encode_destroy_session_maxsz)
 757 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 758                                          decode_destroy_session_maxsz)
 759 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 760                                          encode_destroy_clientid_maxsz)
 761 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 762                                          decode_destroy_clientid_maxsz)
 763 #define NFS4_enc_sequence_sz \
 764                                 (compound_decode_hdr_maxsz + \
 765                                  encode_sequence_maxsz)
 766 #define NFS4_dec_sequence_sz \
 767                                 (compound_decode_hdr_maxsz + \
 768                                  decode_sequence_maxsz)
 769 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 770                                          encode_sequence_maxsz + \
 771                                          encode_putrootfh_maxsz + \
 772                                          encode_fsinfo_maxsz)
 773 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 774                                          decode_sequence_maxsz + \
 775                                          decode_putrootfh_maxsz + \
 776                                          decode_fsinfo_maxsz)
 777 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 778                                          encode_sequence_maxsz + \
 779                                          encode_reclaim_complete_maxsz)
 780 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 781                                          decode_sequence_maxsz + \
 782                                          decode_reclaim_complete_maxsz)
 783 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 784                                 encode_sequence_maxsz + \
 785                                 encode_putfh_maxsz + \
 786                                 encode_getdevicelist_maxsz)
 787 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 788                                 decode_sequence_maxsz + \
 789                                 decode_putfh_maxsz + \
 790                                 decode_getdevicelist_maxsz)
 791 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 792                                 encode_sequence_maxsz +\
 793                                 encode_getdeviceinfo_maxsz)
 794 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 795                                 decode_sequence_maxsz + \
 796                                 decode_getdeviceinfo_maxsz)
 797 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 798                                 encode_sequence_maxsz + \
 799                                 encode_putfh_maxsz +        \
 800                                 encode_layoutget_maxsz)
 801 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 802                                 decode_sequence_maxsz + \
 803                                 decode_putfh_maxsz +        \
 804                                 decode_layoutget_maxsz)
 805 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 806                                 encode_sequence_maxsz +\
 807                                 encode_putfh_maxsz + \
 808                                 encode_layoutcommit_maxsz + \
 809                                 encode_getattr_maxsz)
 810 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 811                                 decode_sequence_maxsz + \
 812                                 decode_putfh_maxsz + \
 813                                 decode_layoutcommit_maxsz + \
 814                                 decode_getattr_maxsz)
 815 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 816                                 encode_sequence_maxsz + \
 817                                 encode_putfh_maxsz + \
 818                                 encode_layoutreturn_maxsz)
 819 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 820                                 decode_sequence_maxsz + \
 821                                 decode_putfh_maxsz + \
 822                                 decode_layoutreturn_maxsz)
 823 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 824                                         encode_sequence_maxsz + \
 825                                         encode_putrootfh_maxsz +\
 826                                         encode_secinfo_no_name_maxsz)
 827 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 828                                         decode_sequence_maxsz + \
 829                                         decode_putrootfh_maxsz + \
 830                                         decode_secinfo_no_name_maxsz)
 831 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 832                                          encode_sequence_maxsz + \
 833                                          encode_test_stateid_maxsz)
 834 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 835                                          decode_sequence_maxsz + \
 836                                          decode_test_stateid_maxsz)
 837 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 838                                          encode_sequence_maxsz + \
 839                                          encode_free_stateid_maxsz)
 840 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 841                                          decode_sequence_maxsz + \
 842                                          decode_free_stateid_maxsz)
 843
 844 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 845                                       compound_encode_hdr_maxsz +
 846                                       encode_sequence_maxsz +
 847                                       encode_putfh_maxsz +
 848                                       encode_getattr_maxsz) *
 849                                      XDR_UNIT);
 850
 851 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 852                                      compound_decode_hdr_maxsz +
 853                                      decode_sequence_maxsz +
 854                                      decode_putfh_maxsz) *
 855                                     XDR_UNIT);
 856 #endif /* CONFIG_NFS_V4_1 */
 857
 858 static const umode_t nfs_type2fmt[] = {
 859         [NF4BAD] = 0,
 860         [NF4REG] = S_IFREG,
 861         [NF4DIR] = S_IFDIR,
 862         [NF4BLK] = S_IFBLK,
 863         [NF4CHR] = S_IFCHR,
 864         [NF4LNK] = S_IFLNK,
 865         [NF4SOCK] = S_IFSOCK,
 866         [NF4FIFO] = S_IFIFO,
 867         [NF4ATTRDIR] = 0,
 868         [NF4NAMEDATTR] = 0,
 869 };
 870
 871 struct compound_hdr {
 872         int32_t         status;
 873         uint32_t        nops;
 874         __be32 *        nops_p;
 875         uint32_t        taglen;
 876         char *          tag;
 877         uint32_t        replen;         /* expected reply words */
 878         u32             minorversion;
 879 };
 880
 881 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 882 {
 883         __be32 *p = xdr_reserve_space(xdr, nbytes);
 884         BUG_ON(!p);
 885         return p;
 886 }
 887
 888 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 889 {
 890         __be32 *p;
 891
 892         p = xdr_reserve_space(xdr, len);
 893         xdr_encode_opaque_fixed(p, buf, len);
 894 }
 895
 896 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 897 {
 898         __be32 *p;
 899
 900         p = reserve_space(xdr, 4 + len);
 901         xdr_encode_opaque(p, str, len);
 902 }
 903
 904 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 905 {
 906         __be32 *p;
 907
 908         p = reserve_space(xdr, 4);
 909         *p = cpu_to_be32(n);
 910 }
 911
 912 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 913 {
 914         __be32 *p;
 915
 916         p = reserve_space(xdr, 8);
 917         xdr_encode_hyper(p, n);
 918 }
 919
 920 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 921                 const struct nfs_seqid *seqid)
 922 {
 923         encode_uint32(xdr, seqid->sequence->counter);
 924 }
 925
 926 static void encode_compound_hdr(struct xdr_stream *xdr,
 927                                 struct rpc_rqst *req,
 928                                 struct compound_hdr *hdr)
 929 {
 930         __be32 *p;
 931         struct rpc_auth *auth = req->rq_cred->cr_auth;
 932
 933         /* initialize running count of expected bytes in reply.
 934          * NOTE: the replied tag SHOULD be the same is the one sent,
 935          * but this is not required as a MUST for the server to do so. */
 936         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 937
 938         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 939         encode_string(xdr, hdr->taglen, hdr->tag);
 940         p = reserve_space(xdr, 8);
 941         *p++ = cpu_to_be32(hdr->minorversion);
 942         hdr->nops_p = p;
 943         *p = cpu_to_be32(hdr->nops);
 944 }
 945
 946 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 947                 uint32_t replen,
 948                 struct compound_hdr *hdr)
 949 {
 950         encode_uint32(xdr, op);
 951         hdr->nops++;
 952         hdr->replen += replen;
 953 }
 954
 955 static void encode_nops(struct compound_hdr *hdr)
 956 {
 957         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 958         *hdr->nops_p = htonl(hdr->nops);
 959 }
 960
 961 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 962 {
 963         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 964 }
 965
 966 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 967 {
 968         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 969 }
 970
 971 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 972 {
 973         char owner_name[IDMAP_NAMESZ];
 974         char owner_group[IDMAP_NAMESZ];
 975         int owner_namelen = 0;
 976         int owner_grouplen = 0;
 977         __be32 *p;
 978         __be32 *q;
 979         int len;
 980         uint32_t bmval0 = 0;
 981         uint32_t bmval1 = 0;
 982
 983         /*
 984          * We reserve enough space to write the entire attribute buffer at once.
 985          * In the worst-case, this would be
 986          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 987          *          = 36 bytes, plus any contribution from variable-length fields
 988          *            such as owner/group.
 989          */
 990         len = 16;
 991
 992         /* Sigh */
 993         if (iap->ia_valid & ATTR_SIZE)
 994                 len += 8;
 995         if (iap->ia_valid & ATTR_MODE)
 996                 len += 4;
 997         if (iap->ia_valid & ATTR_UID) {
 998                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 999                 if (owner_namelen < 0) {
1000                         dprintk("nfs: couldn't resolve uid %d to string\n",
1001                                         from_kuid(&init_user_ns, iap->ia_uid));
1002                         /* XXX */
1003                         strcpy(owner_name, "nobody");
1004                         owner_namelen = sizeof("nobody") - 1;
1005                         /* goto out; */
1006                 }
1007                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1008         }
1009         if (iap->ia_valid & ATTR_GID) {
1010                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1011                 if (owner_grouplen < 0) {
1012                         dprintk("nfs: couldn't resolve gid %d to string\n",
1013                                         from_kgid(&init_user_ns, iap->ia_gid));
1014                         strcpy(owner_group, "nobody");
1015                         owner_grouplen = sizeof("nobody") - 1;
1016                         /* goto out; */
1017                 }
1018                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1019         }
1020         if (iap->ia_valid & ATTR_ATIME_SET)
1021                 len += 16;
1022         else if (iap->ia_valid & ATTR_ATIME)
1023                 len += 4;
1024         if (iap->ia_valid & ATTR_MTIME_SET)
1025                 len += 16;
1026         else if (iap->ia_valid & ATTR_MTIME)
1027                 len += 4;
1028         p = reserve_space(xdr, len);
1029
1030         /*
1031          * We write the bitmap length now, but leave the bitmap and the attribute
1032          * buffer length to be backfilled at the end of this routine.
1033          */
1034         *p++ = cpu_to_be32(2);
1035         q = p;
1036         p += 3;
1037
1038         if (iap->ia_valid & ATTR_SIZE) {
1039                 bmval0 |= FATTR4_WORD0_SIZE;
1040                 p = xdr_encode_hyper(p, iap->ia_size);
1041         }
1042         if (iap->ia_valid & ATTR_MODE) {
1043                 bmval1 |= FATTR4_WORD1_MODE;
1044                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1045         }
1046         if (iap->ia_valid & ATTR_UID) {
1047                 bmval1 |= FATTR4_WORD1_OWNER;
1048                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1049         }
1050         if (iap->ia_valid & ATTR_GID) {
1051                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1052                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1053         }
1054         if (iap->ia_valid & ATTR_ATIME_SET) {
1055                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1056                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1057                 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1058                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1059         }
1060         else if (iap->ia_valid & ATTR_ATIME) {
1061                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1062                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1063         }
1064         if (iap->ia_valid & ATTR_MTIME_SET) {
1065                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1066                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1067                 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1068                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1069         }
1070         else if (iap->ia_valid & ATTR_MTIME) {
1071                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1072                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1073         }
1074
1075         /*
1076          * Now we backfill the bitmap and the attribute buffer length.
1077          */
1078         if (len != ((char *)p - (char *)q) + 4) {
1079                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1080                                 len, ((char *)p - (char *)q) + 4);
1081                 BUG();
1082         }
1083         len = (char *)p - (char *)q - 12;
1084         *q++ = htonl(bmval0);
1085         *q++ = htonl(bmval1);
1086         *q = htonl(len);
1087
1088 /* out: */
1089 }
1090
1091 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1092 {
1093         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1094         encode_uint32(xdr, access);
1095 }
1096
1097 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1098 {
1099         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1100         encode_nfs4_seqid(xdr, arg->seqid);
1101         encode_nfs4_stateid(xdr, arg->stateid);
1102 }
1103
1104 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1105 {
1106         __be32 *p;
1107
1108         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1109         p = reserve_space(xdr, 12);
1110         p = xdr_encode_hyper(p, args->offset);
1111         *p = cpu_to_be32(args->count);
1112 }
1113
1114 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1115 {
1116         __be32 *p;
1117
1118         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1119         encode_uint32(xdr, create->ftype);
1120
1121         switch (create->ftype) {
1122         case NF4LNK:
1123                 p = reserve_space(xdr, 4);
1124                 *p = cpu_to_be32(create->u.symlink.len);
1125                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1126                 break;
1127
1128         case NF4BLK: case NF4CHR:
1129                 p = reserve_space(xdr, 8);
1130                 *p++ = cpu_to_be32(create->u.device.specdata1);
1131                 *p = cpu_to_be32(create->u.device.specdata2);
1132                 break;
1133
1134         default:
1135                 break;
1136         }
1137
1138         encode_string(xdr, create->name->len, create->name->name);
1139         encode_attrs(xdr, create->attrs, create->server);
1140 }
1141
1142 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1143 {
1144         __be32 *p;
1145
1146         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1147         p = reserve_space(xdr, 8);
1148         *p++ = cpu_to_be32(1);
1149         *p = cpu_to_be32(bitmap);
1150 }
1151
1152 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1153 {
1154         __be32 *p;
1155
1156         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1157         p = reserve_space(xdr, 12);
1158         *p++ = cpu_to_be32(2);
1159         *p++ = cpu_to_be32(bm0);
1160         *p = cpu_to_be32(bm1);
1161 }
1162
1163 static void
1164 encode_getattr_three(struct xdr_stream *xdr,
1165                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1166                      struct compound_hdr *hdr)
1167 {
1168         __be32 *p;
1169
1170         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1171         if (bm2) {
1172                 p = reserve_space(xdr, 16);
1173                 *p++ = cpu_to_be32(3);
1174                 *p++ = cpu_to_be32(bm0);
1175                 *p++ = cpu_to_be32(bm1);
1176                 *p = cpu_to_be32(bm2);
1177         } else if (bm1) {
1178                 p = reserve_space(xdr, 12);
1179                 *p++ = cpu_to_be32(2);
1180                 *p++ = cpu_to_be32(bm0);
1181                 *p = cpu_to_be32(bm1);
1182         } else {
1183                 p = reserve_space(xdr, 8);
1184                 *p++ = cpu_to_be32(1);
1185                 *p = cpu_to_be32(bm0);
1186         }
1187 }
1188
1189 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1190 {
1191         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1192                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1193 }
1194
1195 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1196                                  const u32 *open_bitmap,
1197                                  struct compound_hdr *hdr)
1198 {
1199         encode_getattr_three(xdr,
1200                              bitmask[0] & open_bitmap[0],
1201                              bitmask[1] & open_bitmap[1],
1202                              bitmask[2] & open_bitmap[2],
1203                              hdr);
1204 }
1205
1206 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1207 {
1208         encode_getattr_three(xdr,
1209                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1210                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1211                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1212                              hdr);
1213 }
1214
1215 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1216 {
1217         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1218                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1219 }
1220
1221 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1222 {
1223         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1224 }
1225
1226 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1227 {
1228         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1229         encode_string(xdr, name->len, name->name);
1230 }
1231
1232 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1233 {
1234         if (fl->fl_type == F_RDLCK)
1235                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1236         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1237 }
1238
1239 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1240 {
1241         if (fl->fl_end == OFFSET_MAX)
1242                 return ~(uint64_t)0;
1243         return fl->fl_end - fl->fl_start + 1;
1244 }
1245
1246 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1247 {
1248         __be32 *p;
1249
1250         p = reserve_space(xdr, 32);
1251         p = xdr_encode_hyper(p, lowner->clientid);
1252         *p++ = cpu_to_be32(20);
1253         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1254         *p++ = cpu_to_be32(lowner->s_dev);
1255         xdr_encode_hyper(p, lowner->id);
1256 }
1257
1258 /*
1259  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1260  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1261  */
1262 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1263 {
1264         __be32 *p;
1265
1266         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1267         p = reserve_space(xdr, 28);
1268         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1269         *p++ = cpu_to_be32(args->reclaim);
1270         p = xdr_encode_hyper(p, args->fl->fl_start);
1271         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1272         *p = cpu_to_be32(args->new_lock_owner);
1273         if (args->new_lock_owner){
1274                 encode_nfs4_seqid(xdr, args->open_seqid);
1275                 encode_nfs4_stateid(xdr, args->open_stateid);
1276                 encode_nfs4_seqid(xdr, args->lock_seqid);
1277                 encode_lockowner(xdr, &args->lock_owner);
1278         }
1279         else {
1280                 encode_nfs4_stateid(xdr, args->lock_stateid);
1281                 encode_nfs4_seqid(xdr, args->lock_seqid);
1282         }
1283 }
1284
1285 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1286 {
1287         __be32 *p;
1288
1289         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1290         p = reserve_space(xdr, 20);
1291         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1292         p = xdr_encode_hyper(p, args->fl->fl_start);
1293         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1294         encode_lockowner(xdr, &args->lock_owner);
1295 }
1296
1297 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1298 {
1299         __be32 *p;
1300
1301         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1302         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1303         encode_nfs4_seqid(xdr, args->seqid);
1304         encode_nfs4_stateid(xdr, args->stateid);
1305         p = reserve_space(xdr, 16);
1306         p = xdr_encode_hyper(p, args->fl->fl_start);
1307         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1308 }
1309
1310 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1311 {
1312         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1313         encode_lockowner(xdr, lowner);
1314 }
1315
1316 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1317 {
1318         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1319         encode_string(xdr, name->len, name->name);
1320 }
1321
1322 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1323 {
1324         __be32 *p;
1325
1326         p = reserve_space(xdr, 8);
1327         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1328         case FMODE_READ:
1329                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1330                 break;
1331         case FMODE_WRITE:
1332                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1333                 break;
1334         case FMODE_READ|FMODE_WRITE:
1335                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1336                 break;
1337         default:
1338                 *p++ = cpu_to_be32(0);
1339         }
1340         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1341 }
1342
1343 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1344 {
1345         __be32 *p;
1346  /*
1347  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1348  * owner 4 = 32
1349  */
1350         encode_nfs4_seqid(xdr, arg->seqid);
1351         encode_share_access(xdr, arg->fmode);
1352         p = reserve_space(xdr, 36);
1353         p = xdr_encode_hyper(p, arg->clientid);
1354         *p++ = cpu_to_be32(24);
1355         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1356         *p++ = cpu_to_be32(arg->server->s_dev);
1357         *p++ = cpu_to_be32(arg->id.uniquifier);
1358         xdr_encode_hyper(p, arg->id.create_time);
1359 }
1360
1361 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1362 {
1363         struct iattr dummy;
1364         __be32 *p;
1365
1366         p = reserve_space(xdr, 4);
1367         switch(arg->createmode) {
1368         case NFS4_CREATE_UNCHECKED:
1369                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1370                 encode_attrs(xdr, arg->u.attrs, arg->server);
1371                 break;
1372         case NFS4_CREATE_GUARDED:
1373                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1374                 encode_attrs(xdr, arg->u.attrs, arg->server);
1375                 break;
1376         case NFS4_CREATE_EXCLUSIVE:
1377                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1378                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1379                 break;
1380         case NFS4_CREATE_EXCLUSIVE4_1:
1381                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1382                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1383                 dummy.ia_valid = 0;
1384                 encode_attrs(xdr, &dummy, arg->server);
1385         }
1386 }
1387
1388 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1389 {
1390         __be32 *p;
1391
1392         p = reserve_space(xdr, 4);
1393         switch (arg->open_flags & O_CREAT) {
1394         case 0:
1395                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1396                 break;
1397         default:
1398                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1399                 encode_createmode(xdr, arg);
1400         }
1401 }
1402
1403 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1404 {
1405         __be32 *p;
1406
1407         p = reserve_space(xdr, 4);
1408         switch (delegation_type) {
1409         case 0:
1410                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1411                 break;
1412         case FMODE_READ:
1413                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1414                 break;
1415         case FMODE_WRITE|FMODE_READ:
1416                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1417                 break;
1418         default:
1419                 BUG();
1420         }
1421 }
1422
1423 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1424 {
1425         __be32 *p;
1426
1427         p = reserve_space(xdr, 4);
1428         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1429         encode_string(xdr, name->len, name->name);
1430 }
1431
1432 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1433 {
1434         __be32 *p;
1435
1436         p = reserve_space(xdr, 4);
1437         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1438         encode_delegation_type(xdr, type);
1439 }
1440
1441 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1442 {
1443         __be32 *p;
1444
1445         p = reserve_space(xdr, 4);
1446         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1447         encode_nfs4_stateid(xdr, stateid);
1448         encode_string(xdr, name->len, name->name);
1449 }
1450
1451 static inline void encode_claim_fh(struct xdr_stream *xdr)
1452 {
1453         __be32 *p;
1454
1455         p = reserve_space(xdr, 4);
1456         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1457 }
1458
1459 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1460 {
1461         __be32 *p;
1462
1463         p = reserve_space(xdr, 4);
1464         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1465         encode_nfs4_stateid(xdr, stateid);
1466 }
1467
1468 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1469 {
1470         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1471         encode_openhdr(xdr, arg);
1472         encode_opentype(xdr, arg);
1473         switch (arg->claim) {
1474         case NFS4_OPEN_CLAIM_NULL:
1475                 encode_claim_null(xdr, arg->name);
1476                 break;
1477         case NFS4_OPEN_CLAIM_PREVIOUS:
1478                 encode_claim_previous(xdr, arg->u.delegation_type);
1479                 break;
1480         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1481                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1482                 break;
1483         case NFS4_OPEN_CLAIM_FH:
1484                 encode_claim_fh(xdr);
1485                 break;
1486         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1487                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1488                 break;
1489         default:
1490                 BUG();
1491         }
1492 }
1493
1494 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1495 {
1496         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1497         encode_nfs4_stateid(xdr, arg->stateid);
1498         encode_nfs4_seqid(xdr, arg->seqid);
1499 }
1500
1501 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1502 {
1503         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1504         encode_nfs4_stateid(xdr, arg->stateid);
1505         encode_nfs4_seqid(xdr, arg->seqid);
1506         encode_share_access(xdr, arg->fmode);
1507 }
1508
1509 static void
1510 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1511 {
1512         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1513         encode_string(xdr, fh->size, fh->data);
1514 }
1515
1516 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1517 {
1518         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
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_nfs4_stateid(xdr, &args->stateid);
1527
1528         p = reserve_space(xdr, 12);
1529         p = xdr_encode_hyper(p, args->offset);
1530         *p = cpu_to_be32(args->count);
1531 }
1532
1533 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1534 {
1535         uint32_t attrs[2] = {
1536                 FATTR4_WORD0_RDATTR_ERROR,
1537                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1538         };
1539         uint32_t dircount = readdir->count >> 1;
1540         __be32 *p, verf[2];
1541
1542         if (readdir->plus) {
1543                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1544                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1545                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1546                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1547                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1548                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1549                 dircount >>= 1;
1550         }
1551         /* Use mounted_on_fileid only if the server supports it */
1552         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1553                 attrs[0] |= FATTR4_WORD0_FILEID;
1554
1555         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1556         encode_uint64(xdr, readdir->cookie);
1557         encode_nfs4_verifier(xdr, &readdir->verifier);
1558         p = reserve_space(xdr, 20);
1559         *p++ = cpu_to_be32(dircount);
1560         *p++ = cpu_to_be32(readdir->count);
1561         *p++ = cpu_to_be32(2);
1562
1563         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1564         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1565         memcpy(verf, readdir->verifier.data, sizeof(verf));
1566         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1567                         __func__,
1568                         (unsigned long long)readdir->cookie,
1569                         verf[0], verf[1],
1570                         attrs[0] & readdir->bitmask[0],
1571                         attrs[1] & readdir->bitmask[1]);
1572 }
1573
1574 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1575 {
1576         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1577 }
1578
1579 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1580 {
1581         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1582         encode_string(xdr, name->len, name->name);
1583 }
1584
1585 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1586 {
1587         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1588         encode_string(xdr, oldname->len, oldname->name);
1589         encode_string(xdr, newname->len, newname->name);
1590 }
1591
1592 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1593                          struct compound_hdr *hdr)
1594 {
1595         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1596         encode_uint64(xdr, clid);
1597 }
1598
1599 static void
1600 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1601 {
1602         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1603 }
1604
1605 static void
1606 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1607 {
1608         __be32 *p;
1609
1610         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1611         encode_nfs4_stateid(xdr, &zero_stateid);
1612         p = reserve_space(xdr, 2*4);
1613         *p++ = cpu_to_be32(1);
1614         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1615         p = reserve_space(xdr, 4);
1616         *p = cpu_to_be32(arg->acl_len);
1617         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1618 }
1619
1620 static void
1621 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1622 {
1623         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1624 }
1625
1626 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1627 {
1628         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1629         encode_nfs4_stateid(xdr, &arg->stateid);
1630         encode_attrs(xdr, arg->iap, server);
1631 }
1632
1633 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1634 {
1635         __be32 *p;
1636
1637         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1638         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1639
1640         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1641         p = reserve_space(xdr, 4);
1642         *p = cpu_to_be32(setclientid->sc_prog);
1643         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1644         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1645         p = reserve_space(xdr, 4);
1646         *p = cpu_to_be32(setclientid->sc_cb_ident);
1647 }
1648
1649 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1650 {
1651         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1652                         decode_setclientid_confirm_maxsz, hdr);
1653         encode_uint64(xdr, arg->clientid);
1654         encode_nfs4_verifier(xdr, &arg->confirm);
1655 }
1656
1657 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1658 {
1659         __be32 *p;
1660
1661         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1662         encode_nfs4_stateid(xdr, &args->stateid);
1663
1664         p = reserve_space(xdr, 16);
1665         p = xdr_encode_hyper(p, args->offset);
1666         *p++ = cpu_to_be32(args->stable);
1667         *p = cpu_to_be32(args->count);
1668
1669         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1670 }
1671
1672 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1673 {
1674         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1675         encode_nfs4_stateid(xdr, stateid);
1676 }
1677
1678 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1679 {
1680         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1681         encode_string(xdr, name->len, name->name);
1682 }
1683
1684 #if defined(CONFIG_NFS_V4_1)
1685 /* NFSv4.1 operations */
1686 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1687                                    struct nfs4_session *session,
1688                                    struct compound_hdr *hdr)
1689 {
1690         __be32 *p;
1691
1692         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1693                 decode_bind_conn_to_session_maxsz, hdr);
1694         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1695         p = xdr_reserve_space(xdr, 8);
1696         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1697         *p = 0; /* use_conn_in_rdma_mode = False */
1698 }
1699
1700 static void encode_exchange_id(struct xdr_stream *xdr,
1701                                struct nfs41_exchange_id_args *args,
1702                                struct compound_hdr *hdr)
1703 {
1704         __be32 *p;
1705         char impl_name[IMPL_NAME_LIMIT];
1706         int len = 0;
1707
1708         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1709         encode_nfs4_verifier(xdr, args->verifier);
1710
1711         encode_string(xdr, args->id_len, args->id);
1712
1713         p = reserve_space(xdr, 12);
1714         *p++ = cpu_to_be32(args->flags);
1715         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1716
1717         if (send_implementation_id &&
1718             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1719             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1720                 <= sizeof(impl_name) + 1)
1721                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1722                                utsname()->sysname, utsname()->release,
1723                                utsname()->version, utsname()->machine);
1724
1725         if (len > 0) {
1726                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1727
1728                 encode_string(xdr,
1729                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1730                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1731                 encode_string(xdr, len, impl_name);
1732                 /* just send zeros for nii_date - the date is in nii_name */
1733                 p = reserve_space(xdr, 12);
1734                 p = xdr_encode_hyper(p, 0);
1735                 *p = cpu_to_be32(0);
1736         } else
1737                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1738 }
1739
1740 static void encode_create_session(struct xdr_stream *xdr,
1741                                   struct nfs41_create_session_args *args,
1742                                   struct compound_hdr *hdr)
1743 {
1744         __be32 *p;
1745         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1746         uint32_t len;
1747         struct nfs_client *clp = args->client;
1748         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1749         u32 max_resp_sz_cached;
1750
1751         /*
1752          * Assumes OPEN is the biggest non-idempotent compound.
1753          * 2 is the verifier.
1754          */
1755         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1756                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1757
1758         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1759                         clp->cl_ipaddr);
1760
1761         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1762         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1763         p = xdr_encode_hyper(p, clp->cl_clientid);
1764         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1765         *p++ = cpu_to_be32(args->flags);                        /*flags */
1766
1767         /* Fore Channel */
1768         *p++ = cpu_to_be32(0);                          /* header padding size */
1769         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1770         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1771         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1772         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1773         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1774         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1775
1776         /* Back Channel */
1777         *p++ = cpu_to_be32(0);                          /* header padding size */
1778         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1779         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1780         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1781         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1782         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1783         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1784
1785         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1786         *p++ = cpu_to_be32(1);
1787         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1788
1789         /* authsys_parms rfc1831 */
1790         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1791         p = xdr_encode_opaque(p, machine_name, len);
1792         *p++ = cpu_to_be32(0);                          /* UID */
1793         *p++ = cpu_to_be32(0);                          /* GID */
1794         *p = cpu_to_be32(0);                            /* No more gids */
1795 }
1796
1797 static void encode_destroy_session(struct xdr_stream *xdr,
1798                                    struct nfs4_session *session,
1799                                    struct compound_hdr *hdr)
1800 {
1801         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1802         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1803 }
1804
1805 static void encode_destroy_clientid(struct xdr_stream *xdr,
1806                                    uint64_t clientid,
1807                                    struct compound_hdr *hdr)
1808 {
1809         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1810         encode_uint64(xdr, clientid);
1811 }
1812
1813 static void encode_reclaim_complete(struct xdr_stream *xdr,
1814                                     struct nfs41_reclaim_complete_args *args,
1815                                     struct compound_hdr *hdr)
1816 {
1817         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1818         encode_uint32(xdr, args->one_fs);
1819 }
1820 #endif /* CONFIG_NFS_V4_1 */
1821
1822 static void encode_sequence(struct xdr_stream *xdr,
1823                             const struct nfs4_sequence_args *args,
1824                             struct compound_hdr *hdr)
1825 {
1826 #if defined(CONFIG_NFS_V4_1)
1827         struct nfs4_session *session;
1828         struct nfs4_slot_table *tp;
1829         struct nfs4_slot *slot = args->sa_slot;
1830         __be32 *p;
1831
1832         if (slot == NULL)
1833                 return;
1834
1835         tp = slot->table;
1836         session = tp->session;
1837
1838         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1839
1840         /*
1841          * Sessionid + seqid + slotid + max slotid + cache_this
1842          */
1843         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1844                 "max_slotid=%d cache_this=%d\n",
1845                 __func__,
1846                 ((u32 *)session->sess_id.data)[0],
1847                 ((u32 *)session->sess_id.data)[1],
1848                 ((u32 *)session->sess_id.data)[2],
1849                 ((u32 *)session->sess_id.data)[3],
1850                 slot->seq_nr, slot->slot_nr,
1851                 tp->highest_used_slotid, args->sa_cache_this);
1852         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1853         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1854         *p++ = cpu_to_be32(slot->seq_nr);
1855         *p++ = cpu_to_be32(slot->slot_nr);
1856         *p++ = cpu_to_be32(tp->highest_used_slotid);
1857         *p = cpu_to_be32(args->sa_cache_this);
1858 #endif /* CONFIG_NFS_V4_1 */
1859 }
1860
1861 #ifdef CONFIG_NFS_V4_1
1862 static void
1863 encode_getdevicelist(struct xdr_stream *xdr,
1864                      const struct nfs4_getdevicelist_args *args,
1865                      struct compound_hdr *hdr)
1866 {
1867         __be32 *p;
1868         nfs4_verifier dummy = {
1869                 .data = "dummmmmy",
1870         };
1871
1872         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1873         p = reserve_space(xdr, 16);
1874         *p++ = cpu_to_be32(args->layoutclass);
1875         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1876         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1877         encode_nfs4_verifier(xdr, &dummy);
1878 }
1879
1880 static void
1881 encode_getdeviceinfo(struct xdr_stream *xdr,
1882                      const struct nfs4_getdeviceinfo_args *args,
1883                      struct compound_hdr *hdr)
1884 {
1885         __be32 *p;
1886
1887         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1888         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1889         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1890                                     NFS4_DEVICEID4_SIZE);
1891         *p++ = cpu_to_be32(args->pdev->layout_type);
1892         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1893         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1894 }
1895
1896 static void
1897 encode_layoutget(struct xdr_stream *xdr,
1898                       const struct nfs4_layoutget_args *args,
1899                       struct compound_hdr *hdr)
1900 {
1901         __be32 *p;
1902
1903         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1904         p = reserve_space(xdr, 36);
1905         *p++ = cpu_to_be32(0);     /* Signal layout available */
1906         *p++ = cpu_to_be32(args->type);
1907         *p++ = cpu_to_be32(args->range.iomode);
1908         p = xdr_encode_hyper(p, args->range.offset);
1909         p = xdr_encode_hyper(p, args->range.length);
1910         p = xdr_encode_hyper(p, args->minlength);
1911         encode_nfs4_stateid(xdr, &args->stateid);
1912         encode_uint32(xdr, args->maxcount);
1913
1914         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1915                 __func__,
1916                 args->type,
1917                 args->range.iomode,
1918                 (unsigned long)args->range.offset,
1919                 (unsigned long)args->range.length,
1920                 args->maxcount);
1921 }
1922
1923 static int
1924 encode_layoutcommit(struct xdr_stream *xdr,
1925                     struct inode *inode,
1926                     const struct nfs4_layoutcommit_args *args,
1927                     struct compound_hdr *hdr)
1928 {
1929         __be32 *p;
1930
1931         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1932                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1933
1934         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1935         p = reserve_space(xdr, 20);
1936         /* Only whole file layouts */
1937         p = xdr_encode_hyper(p, 0); /* offset */
1938         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1939         *p = cpu_to_be32(0); /* reclaim */
1940         encode_nfs4_stateid(xdr, &args->stateid);
1941         p = reserve_space(xdr, 20);
1942         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1943         p = xdr_encode_hyper(p, args->lastbytewritten);
1944         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1945         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1946
1947         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1948                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1949                         NFS_I(inode)->layout, xdr, args);
1950         else
1951                 encode_uint32(xdr, 0); /* no layout-type payload */
1952
1953         return 0;
1954 }
1955
1956 static void
1957 encode_layoutreturn(struct xdr_stream *xdr,
1958                     const struct nfs4_layoutreturn_args *args,
1959                     struct compound_hdr *hdr)
1960 {
1961         __be32 *p;
1962
1963         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1964         p = reserve_space(xdr, 16);
1965         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1966         *p++ = cpu_to_be32(args->layout_type);
1967         *p++ = cpu_to_be32(IOMODE_ANY);
1968         *p = cpu_to_be32(RETURN_FILE);
1969         p = reserve_space(xdr, 16);
1970         p = xdr_encode_hyper(p, 0);
1971         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1972         spin_lock(&args->inode->i_lock);
1973         encode_nfs4_stateid(xdr, &args->stateid);
1974         spin_unlock(&args->inode->i_lock);
1975         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1976                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1977                         NFS_I(args->inode)->layout, xdr, args);
1978         } else
1979                 encode_uint32(xdr, 0);
1980 }
1981
1982 static int
1983 encode_secinfo_no_name(struct xdr_stream *xdr,
1984                        const struct nfs41_secinfo_no_name_args *args,
1985                        struct compound_hdr *hdr)
1986 {
1987         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
1988         encode_uint32(xdr, args->style);
1989         return 0;
1990 }
1991
1992 static void encode_test_stateid(struct xdr_stream *xdr,
1993                                 struct nfs41_test_stateid_args *args,
1994                                 struct compound_hdr *hdr)
1995 {
1996         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
1997         encode_uint32(xdr, 1);
1998         encode_nfs4_stateid(xdr, args->stateid);
1999 }
2000
2001 static void encode_free_stateid(struct xdr_stream *xdr,
2002                                 struct nfs41_free_stateid_args *args,
2003                                 struct compound_hdr *hdr)
2004 {
2005         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2006         encode_nfs4_stateid(xdr, &args->stateid);
2007 }
2008 #endif /* CONFIG_NFS_V4_1 */
2009
2010 /*
2011  * END OF "GENERIC" ENCODE ROUTINES.
2012  */
2013
2014 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2015 {
2016 #if defined(CONFIG_NFS_V4_1)
2017
2018         if (args->sa_slot)
2019                 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2020 #endif /* CONFIG_NFS_V4_1 */
2021         return 0;
2022 }
2023
2024 /*
2025  * Encode an ACCESS request
2026  */
2027 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2028                                 const struct nfs4_accessargs *args)
2029 {
2030         struct compound_hdr hdr = {
2031                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2032         };
2033
2034         encode_compound_hdr(xdr, req, &hdr);
2035         encode_sequence(xdr, &args->seq_args, &hdr);
2036         encode_putfh(xdr, args->fh, &hdr);
2037         encode_access(xdr, args->access, &hdr);
2038         encode_getfattr(xdr, args->bitmask, &hdr);
2039         encode_nops(&hdr);
2040 }
2041
2042 /*
2043  * Encode LOOKUP request
2044  */
2045 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2046                                 const struct nfs4_lookup_arg *args)
2047 {
2048         struct compound_hdr hdr = {
2049                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2050         };
2051
2052         encode_compound_hdr(xdr, req, &hdr);
2053         encode_sequence(xdr, &args->seq_args, &hdr);
2054         encode_putfh(xdr, args->dir_fh, &hdr);
2055         encode_lookup(xdr, args->name, &hdr);
2056         encode_getfh(xdr, &hdr);
2057         encode_getfattr(xdr, args->bitmask, &hdr);
2058         encode_nops(&hdr);
2059 }
2060
2061 /*
2062  * Encode LOOKUP_ROOT request
2063  */
2064 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2065                                      struct xdr_stream *xdr,
2066                                      const struct nfs4_lookup_root_arg *args)
2067 {
2068         struct compound_hdr hdr = {
2069                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2070         };
2071
2072         encode_compound_hdr(xdr, req, &hdr);
2073         encode_sequence(xdr, &args->seq_args, &hdr);
2074         encode_putrootfh(xdr, &hdr);
2075         encode_getfh(xdr, &hdr);
2076         encode_getfattr(xdr, args->bitmask, &hdr);
2077         encode_nops(&hdr);
2078 }
2079
2080 /*
2081  * Encode REMOVE request
2082  */
2083 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2084                                 const struct nfs_removeargs *args)
2085 {
2086         struct compound_hdr hdr = {
2087                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2088         };
2089
2090         encode_compound_hdr(xdr, req, &hdr);
2091         encode_sequence(xdr, &args->seq_args, &hdr);
2092         encode_putfh(xdr, args->fh, &hdr);
2093         encode_remove(xdr, &args->name, &hdr);
2094         encode_nops(&hdr);
2095 }
2096
2097 /*
2098  * Encode RENAME request
2099  */
2100 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2101                                 const struct nfs_renameargs *args)
2102 {
2103         struct compound_hdr hdr = {
2104                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2105         };
2106
2107         encode_compound_hdr(xdr, req, &hdr);
2108         encode_sequence(xdr, &args->seq_args, &hdr);
2109         encode_putfh(xdr, args->old_dir, &hdr);
2110         encode_savefh(xdr, &hdr);
2111         encode_putfh(xdr, args->new_dir, &hdr);
2112         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2113         encode_nops(&hdr);
2114 }
2115
2116 /*
2117  * Encode LINK request
2118  */
2119 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2120                              const struct nfs4_link_arg *args)
2121 {
2122         struct compound_hdr hdr = {
2123                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2124         };
2125
2126         encode_compound_hdr(xdr, req, &hdr);
2127         encode_sequence(xdr, &args->seq_args, &hdr);
2128         encode_putfh(xdr, args->fh, &hdr);
2129         encode_savefh(xdr, &hdr);
2130         encode_putfh(xdr, args->dir_fh, &hdr);
2131         encode_link(xdr, args->name, &hdr);
2132         encode_restorefh(xdr, &hdr);
2133         encode_getfattr(xdr, args->bitmask, &hdr);
2134         encode_nops(&hdr);
2135 }
2136
2137 /*
2138  * Encode CREATE request
2139  */
2140 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2141                                 const struct nfs4_create_arg *args)
2142 {
2143         struct compound_hdr hdr = {
2144                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145         };
2146
2147         encode_compound_hdr(xdr, req, &hdr);
2148         encode_sequence(xdr, &args->seq_args, &hdr);
2149         encode_putfh(xdr, args->dir_fh, &hdr);
2150         encode_create(xdr, args, &hdr);
2151         encode_getfh(xdr, &hdr);
2152         encode_getfattr(xdr, args->bitmask, &hdr);
2153         encode_nops(&hdr);
2154 }
2155
2156 /*
2157  * Encode SYMLINK request
2158  */
2159 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2160                                  const struct nfs4_create_arg *args)
2161 {
2162         nfs4_xdr_enc_create(req, xdr, args);
2163 }
2164
2165 /*
2166  * Encode GETATTR request
2167  */
2168 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2169                                  const struct nfs4_getattr_arg *args)
2170 {
2171         struct compound_hdr hdr = {
2172                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2173         };
2174
2175         encode_compound_hdr(xdr, req, &hdr);
2176         encode_sequence(xdr, &args->seq_args, &hdr);
2177         encode_putfh(xdr, args->fh, &hdr);
2178         encode_getfattr(xdr, args->bitmask, &hdr);
2179         encode_nops(&hdr);
2180 }
2181
2182 /*
2183  * Encode a CLOSE request
2184  */
2185 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2186                                struct nfs_closeargs *args)
2187 {
2188         struct compound_hdr hdr = {
2189                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190         };
2191
2192         encode_compound_hdr(xdr, req, &hdr);
2193         encode_sequence(xdr, &args->seq_args, &hdr);
2194         encode_putfh(xdr, args->fh, &hdr);
2195         encode_close(xdr, args, &hdr);
2196         encode_getfattr(xdr, args->bitmask, &hdr);
2197         encode_nops(&hdr);
2198 }
2199
2200 /*
2201  * Encode an OPEN request
2202  */
2203 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2204                               struct nfs_openargs *args)
2205 {
2206         struct compound_hdr hdr = {
2207                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2208         };
2209
2210         encode_compound_hdr(xdr, req, &hdr);
2211         encode_sequence(xdr, &args->seq_args, &hdr);
2212         encode_putfh(xdr, args->fh, &hdr);
2213         encode_open(xdr, args, &hdr);
2214         encode_getfh(xdr, &hdr);
2215         if (args->access)
2216                 encode_access(xdr, args->access, &hdr);
2217         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2218         encode_nops(&hdr);
2219 }
2220
2221 /*
2222  * Encode an OPEN_CONFIRM request
2223  */
2224 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2225                                       struct xdr_stream *xdr,
2226                                       struct nfs_open_confirmargs *args)
2227 {
2228         struct compound_hdr hdr = {
2229                 .nops   = 0,
2230         };
2231
2232         encode_compound_hdr(xdr, req, &hdr);
2233         encode_putfh(xdr, args->fh, &hdr);
2234         encode_open_confirm(xdr, args, &hdr);
2235         encode_nops(&hdr);
2236 }
2237
2238 /*
2239  * Encode an OPEN request with no attributes.
2240  */
2241 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2242                                      struct xdr_stream *xdr,
2243                                      struct nfs_openargs *args)
2244 {
2245         struct compound_hdr hdr = {
2246                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2247         };
2248
2249         encode_compound_hdr(xdr, req, &hdr);
2250         encode_sequence(xdr, &args->seq_args, &hdr);
2251         encode_putfh(xdr, args->fh, &hdr);
2252         encode_open(xdr, args, &hdr);
2253         if (args->access)
2254                 encode_access(xdr, args->access, &hdr);
2255         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &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
2601         encode_compound_hdr(xdr, req, &hdr);
2602         encode_setclientid_confirm(xdr, arg, &hdr);
2603         encode_nops(&hdr);
2604 }
2605
2606 /*
2607  * DELEGRETURN request
2608  */
2609 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2610                                      struct xdr_stream *xdr,
2611                                      const struct nfs4_delegreturnargs *args)
2612 {
2613         struct compound_hdr hdr = {
2614                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2615         };
2616
2617         encode_compound_hdr(xdr, req, &hdr);
2618         encode_sequence(xdr, &args->seq_args, &hdr);
2619         encode_putfh(xdr, args->fhandle, &hdr);
2620         encode_getfattr(xdr, args->bitmask, &hdr);
2621         encode_delegreturn(xdr, args->stateid, &hdr);
2622         encode_nops(&hdr);
2623 }
2624
2625 /*
2626  * Encode FS_LOCATIONS request
2627  */
2628 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2629                                       struct xdr_stream *xdr,
2630                                       struct nfs4_fs_locations_arg *args)
2631 {
2632         struct compound_hdr hdr = {
2633                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2634         };
2635         uint32_t replen;
2636
2637         encode_compound_hdr(xdr, req, &hdr);
2638         encode_sequence(xdr, &args->seq_args, &hdr);
2639         encode_putfh(xdr, args->dir_fh, &hdr);
2640         encode_lookup(xdr, args->name, &hdr);
2641         replen = hdr.replen;    /* get the attribute into args->page */
2642         encode_fs_locations(xdr, args->bitmask, &hdr);
2643
2644         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2645                         0, PAGE_SIZE);
2646         encode_nops(&hdr);
2647 }
2648
2649 /*
2650  * Encode SECINFO request
2651  */
2652 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2653                                 struct xdr_stream *xdr,
2654                                 struct nfs4_secinfo_arg *args)
2655 {
2656         struct compound_hdr hdr = {
2657                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2658         };
2659
2660         encode_compound_hdr(xdr, req, &hdr);
2661         encode_sequence(xdr, &args->seq_args, &hdr);
2662         encode_putfh(xdr, args->dir_fh, &hdr);
2663         encode_secinfo(xdr, args->name, &hdr);
2664         encode_nops(&hdr);
2665 }
2666
2667 #if defined(CONFIG_NFS_V4_1)
2668 /*
2669  * BIND_CONN_TO_SESSION request
2670  */
2671 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2672                                 struct xdr_stream *xdr,
2673                                 struct nfs_client *clp)
2674 {
2675         struct compound_hdr hdr = {
2676                 .minorversion = clp->cl_mvops->minor_version,
2677         };
2678
2679         encode_compound_hdr(xdr, req, &hdr);
2680         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2681         encode_nops(&hdr);
2682 }
2683
2684 /*
2685  * EXCHANGE_ID request
2686  */
2687 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2688                                      struct xdr_stream *xdr,
2689                                      struct nfs41_exchange_id_args *args)
2690 {
2691         struct compound_hdr hdr = {
2692                 .minorversion = args->client->cl_mvops->minor_version,
2693         };
2694
2695         encode_compound_hdr(xdr, req, &hdr);
2696         encode_exchange_id(xdr, args, &hdr);
2697         encode_nops(&hdr);
2698 }
2699
2700 /*
2701  * a CREATE_SESSION request
2702  */
2703 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2704                                         struct xdr_stream *xdr,
2705                                         struct nfs41_create_session_args *args)
2706 {
2707         struct compound_hdr hdr = {
2708                 .minorversion = args->client->cl_mvops->minor_version,
2709         };
2710
2711         encode_compound_hdr(xdr, req, &hdr);
2712         encode_create_session(xdr, args, &hdr);
2713         encode_nops(&hdr);
2714 }
2715
2716 /*
2717  * a DESTROY_SESSION request
2718  */
2719 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2720                                          struct xdr_stream *xdr,
2721                                          struct nfs4_session *session)
2722 {
2723         struct compound_hdr hdr = {
2724                 .minorversion = session->clp->cl_mvops->minor_version,
2725         };
2726
2727         encode_compound_hdr(xdr, req, &hdr);
2728         encode_destroy_session(xdr, session, &hdr);
2729         encode_nops(&hdr);
2730 }
2731
2732 /*
2733  * a DESTROY_CLIENTID request
2734  */
2735 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2736                                          struct xdr_stream *xdr,
2737                                          struct nfs_client *clp)
2738 {
2739         struct compound_hdr hdr = {
2740                 .minorversion = clp->cl_mvops->minor_version,
2741         };
2742
2743         encode_compound_hdr(xdr, req, &hdr);
2744         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2745         encode_nops(&hdr);
2746 }
2747
2748 /*
2749  * a SEQUENCE request
2750  */
2751 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2752                                   struct nfs4_sequence_args *args)
2753 {
2754         struct compound_hdr hdr = {
2755                 .minorversion = nfs4_xdr_minorversion(args),
2756         };
2757
2758         encode_compound_hdr(xdr, req, &hdr);
2759         encode_sequence(xdr, args, &hdr);
2760         encode_nops(&hdr);
2761 }
2762
2763 /*
2764  * a GET_LEASE_TIME request
2765  */
2766 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2767                                         struct xdr_stream *xdr,
2768                                         struct nfs4_get_lease_time_args *args)
2769 {
2770         struct compound_hdr hdr = {
2771                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2772         };
2773         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2774
2775         encode_compound_hdr(xdr, req, &hdr);
2776         encode_sequence(xdr, &args->la_seq_args, &hdr);
2777         encode_putrootfh(xdr, &hdr);
2778         encode_fsinfo(xdr, lease_bitmap, &hdr);
2779         encode_nops(&hdr);
2780 }
2781
2782 /*
2783  * a RECLAIM_COMPLETE request
2784  */
2785 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2786                                           struct xdr_stream *xdr,
2787                                 struct nfs41_reclaim_complete_args *args)
2788 {
2789         struct compound_hdr hdr = {
2790                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2791         };
2792
2793         encode_compound_hdr(xdr, req, &hdr);
2794         encode_sequence(xdr, &args->seq_args, &hdr);
2795         encode_reclaim_complete(xdr, args, &hdr);
2796         encode_nops(&hdr);
2797 }
2798
2799 /*
2800  * Encode GETDEVICELIST request
2801  */
2802 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2803                                        struct xdr_stream *xdr,
2804                                        struct nfs4_getdevicelist_args *args)
2805 {
2806         struct compound_hdr hdr = {
2807                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2808         };
2809
2810         encode_compound_hdr(xdr, req, &hdr);
2811         encode_sequence(xdr, &args->seq_args, &hdr);
2812         encode_putfh(xdr, args->fh, &hdr);
2813         encode_getdevicelist(xdr, args, &hdr);
2814         encode_nops(&hdr);
2815 }
2816
2817 /*
2818  * Encode GETDEVICEINFO request
2819  */
2820 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2821                                        struct xdr_stream *xdr,
2822                                        struct nfs4_getdeviceinfo_args *args)
2823 {
2824         struct compound_hdr hdr = {
2825                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2826         };
2827
2828         encode_compound_hdr(xdr, req, &hdr);
2829         encode_sequence(xdr, &args->seq_args, &hdr);
2830         encode_getdeviceinfo(xdr, args, &hdr);
2831
2832         /* set up reply kvec. Subtract notification bitmap max size (2)
2833          * so that notification bitmap is put in xdr_buf tail */
2834         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2835                          args->pdev->pages, args->pdev->pgbase,
2836                          args->pdev->pglen);
2837
2838         encode_nops(&hdr);
2839 }
2840
2841 /*
2842  *  Encode LAYOUTGET request
2843  */
2844 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2845                                    struct xdr_stream *xdr,
2846                                    struct nfs4_layoutget_args *args)
2847 {
2848         struct compound_hdr hdr = {
2849                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2850         };
2851
2852         encode_compound_hdr(xdr, req, &hdr);
2853         encode_sequence(xdr, &args->seq_args, &hdr);
2854         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2855         encode_layoutget(xdr, args, &hdr);
2856
2857         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2858             args->layout.pages, 0, args->layout.pglen);
2859
2860         encode_nops(&hdr);
2861 }
2862
2863 /*
2864  *  Encode LAYOUTCOMMIT request
2865  */
2866 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2867                                       struct xdr_stream *xdr,
2868                                       struct nfs4_layoutcommit_args *args)
2869 {
2870         struct nfs4_layoutcommit_data *data =
2871                 container_of(args, struct nfs4_layoutcommit_data, args);
2872         struct compound_hdr hdr = {
2873                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2874         };
2875
2876         encode_compound_hdr(xdr, req, &hdr);
2877         encode_sequence(xdr, &args->seq_args, &hdr);
2878         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2879         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2880         encode_getfattr(xdr, args->bitmask, &hdr);
2881         encode_nops(&hdr);
2882 }
2883
2884 /*
2885  * Encode LAYOUTRETURN request
2886  */
2887 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2888                                       struct xdr_stream *xdr,
2889                                       struct nfs4_layoutreturn_args *args)
2890 {
2891         struct compound_hdr hdr = {
2892                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2893         };
2894
2895         encode_compound_hdr(xdr, req, &hdr);
2896         encode_sequence(xdr, &args->seq_args, &hdr);
2897         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2898         encode_layoutreturn(xdr, args, &hdr);
2899         encode_nops(&hdr);
2900 }
2901
2902 /*
2903  * Encode SECINFO_NO_NAME request
2904  */
2905 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2906                                         struct xdr_stream *xdr,
2907                                         struct nfs41_secinfo_no_name_args *args)
2908 {
2909         struct compound_hdr hdr = {
2910                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2911         };
2912
2913         encode_compound_hdr(xdr, req, &hdr);
2914         encode_sequence(xdr, &args->seq_args, &hdr);
2915         encode_putrootfh(xdr, &hdr);
2916         encode_secinfo_no_name(xdr, args, &hdr);
2917         encode_nops(&hdr);
2918         return 0;
2919 }
2920
2921 /*
2922  *  Encode TEST_STATEID request
2923  */
2924 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2925                                       struct xdr_stream *xdr,
2926                                       struct nfs41_test_stateid_args *args)
2927 {
2928         struct compound_hdr hdr = {
2929                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2930         };
2931
2932         encode_compound_hdr(xdr, req, &hdr);
2933         encode_sequence(xdr, &args->seq_args, &hdr);
2934         encode_test_stateid(xdr, args, &hdr);
2935         encode_nops(&hdr);
2936 }
2937
2938 /*
2939  *  Encode FREE_STATEID request
2940  */
2941 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2942                                      struct xdr_stream *xdr,
2943                                      struct nfs41_free_stateid_args *args)
2944 {
2945         struct compound_hdr hdr = {
2946                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2947         };
2948
2949         encode_compound_hdr(xdr, req, &hdr);
2950         encode_sequence(xdr, &args->seq_args, &hdr);
2951         encode_free_stateid(xdr, args, &hdr);
2952         encode_nops(&hdr);
2953 }
2954 #endif /* CONFIG_NFS_V4_1 */
2955
2956 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2957 {
2958         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2959                 "Remaining buffer length is %tu words.\n",
2960                 func, xdr->end - xdr->p);
2961 }
2962
2963 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2964 {
2965         __be32 *p;
2966
2967         p = xdr_inline_decode(xdr, 4);
2968         if (unlikely(!p))
2969                 goto out_overflow;
2970         *len = be32_to_cpup(p);
2971         p = xdr_inline_decode(xdr, *len);
2972         if (unlikely(!p))
2973                 goto out_overflow;
2974         *string = (char *)p;
2975         return 0;
2976 out_overflow:
2977         print_overflow_msg(__func__, xdr);
2978         return -EIO;
2979 }
2980
2981 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2982 {
2983         __be32 *p;
2984
2985         p = xdr_inline_decode(xdr, 8);
2986         if (unlikely(!p))
2987                 goto out_overflow;
2988         hdr->status = be32_to_cpup(p++);
2989         hdr->taglen = be32_to_cpup(p);
2990
2991         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2992         if (unlikely(!p))
2993                 goto out_overflow;
2994         hdr->tag = (char *)p;
2995         p += XDR_QUADLEN(hdr->taglen);
2996         hdr->nops = be32_to_cpup(p);
2997         if (unlikely(hdr->nops < 1))
2998                 return nfs4_stat_to_errno(hdr->status);
2999         return 0;
3000 out_overflow:
3001         print_overflow_msg(__func__, xdr);
3002         return -EIO;
3003 }
3004
3005 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3006                 int *nfs_retval)
3007 {
3008         __be32 *p;
3009         uint32_t opnum;
3010         int32_t nfserr;
3011
3012         p = xdr_inline_decode(xdr, 8);
3013         if (unlikely(!p))
3014                 goto out_overflow;
3015         opnum = be32_to_cpup(p++);
3016         if (unlikely(opnum != expected))
3017                 goto out_bad_operation;
3018         nfserr = be32_to_cpup(p);
3019         if (nfserr == NFS_OK)
3020                 *nfs_retval = 0;
3021         else
3022                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3023         return true;
3024 out_bad_operation:
3025         dprintk("nfs: Server returned operation"
3026                 " %d but we issued a request for %d\n",
3027                         opnum, expected);
3028         *nfs_retval = -EREMOTEIO;
3029         return false;
3030 out_overflow:
3031         print_overflow_msg(__func__, xdr);
3032         *nfs_retval = -EIO;
3033         return false;
3034 }
3035
3036 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3037 {
3038         int retval;
3039
3040         __decode_op_hdr(xdr, expected, &retval);
3041         return retval;
3042 }
3043
3044 /* Dummy routine */
3045 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3046 {
3047         __be32 *p;
3048         unsigned int strlen;
3049         char *str;
3050
3051         p = xdr_inline_decode(xdr, 12);
3052         if (likely(p))
3053                 return decode_opaque_inline(xdr, &strlen, &str);
3054         print_overflow_msg(__func__, xdr);
3055         return -EIO;
3056 }
3057
3058 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3059 {
3060         uint32_t bmlen;
3061         __be32 *p;
3062
3063         p = xdr_inline_decode(xdr, 4);
3064         if (unlikely(!p))
3065                 goto out_overflow;
3066         bmlen = be32_to_cpup(p);
3067
3068         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3069         p = xdr_inline_decode(xdr, (bmlen << 2));
3070         if (unlikely(!p))
3071                 goto out_overflow;
3072         if (bmlen > 0) {
3073                 bitmap[0] = be32_to_cpup(p++);
3074                 if (bmlen > 1) {
3075                         bitmap[1] = be32_to_cpup(p++);
3076                         if (bmlen > 2)
3077                                 bitmap[2] = be32_to_cpup(p);
3078                 }
3079         }
3080         return 0;
3081 out_overflow:
3082         print_overflow_msg(__func__, xdr);
3083         return -EIO;
3084 }
3085
3086 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3087 {
3088         __be32 *p;
3089
3090         p = xdr_inline_decode(xdr, 4);
3091         if (unlikely(!p))
3092                 goto out_overflow;
3093         *attrlen = be32_to_cpup(p);
3094         *savep = xdr_stream_pos(xdr);
3095         return 0;
3096 out_overflow:
3097         print_overflow_msg(__func__, xdr);
3098         return -EIO;
3099 }
3100
3101 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3102 {
3103         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3104                 int ret;
3105                 ret = decode_attr_bitmap(xdr, bitmask);
3106                 if (unlikely(ret < 0))
3107                         return ret;
3108                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3109         } else
3110                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3111         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3112                 bitmask[0], bitmask[1], bitmask[2]);
3113         return 0;
3114 }
3115
3116 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3117 {
3118         __be32 *p;
3119         int ret = 0;
3120
3121         *type = 0;
3122         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3123                 return -EIO;
3124         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3125                 p = xdr_inline_decode(xdr, 4);
3126                 if (unlikely(!p))
3127                         goto out_overflow;
3128                 *type = be32_to_cpup(p);
3129                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3130                         dprintk("%s: bad type %d\n", __func__, *type);
3131                         return -EIO;
3132                 }
3133                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3134                 ret = NFS_ATTR_FATTR_TYPE;
3135         }
3136         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3137         return ret;
3138 out_overflow:
3139         print_overflow_msg(__func__, xdr);
3140         return -EIO;
3141 }
3142
3143 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3144                                       uint32_t *bitmap, uint32_t *type)
3145 {
3146         __be32 *p;
3147
3148         *type = 0;
3149         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3150                 return -EIO;
3151         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3152                 p = xdr_inline_decode(xdr, 4);
3153                 if (unlikely(!p))
3154                         goto out_overflow;
3155                 *type = be32_to_cpup(p);
3156                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3157         }
3158         dprintk("%s: expire type=0x%x\n", __func__, *type);
3159         return 0;
3160 out_overflow:
3161         print_overflow_msg(__func__, xdr);
3162         return -EIO;
3163 }
3164
3165 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3166 {
3167         __be32 *p;
3168         int ret = 0;
3169
3170         *change = 0;
3171         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3172                 return -EIO;
3173         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3174                 p = xdr_inline_decode(xdr, 8);
3175                 if (unlikely(!p))
3176                         goto out_overflow;
3177                 xdr_decode_hyper(p, change);
3178                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3179                 ret = NFS_ATTR_FATTR_CHANGE;
3180         }
3181         dprintk("%s: change attribute=%Lu\n", __func__,
3182                         (unsigned long long)*change);
3183         return ret;
3184 out_overflow:
3185         print_overflow_msg(__func__, xdr);
3186         return -EIO;
3187 }
3188
3189 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3190 {
3191         __be32 *p;
3192         int ret = 0;
3193
3194         *size = 0;
3195         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3196                 return -EIO;
3197         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3198                 p = xdr_inline_decode(xdr, 8);
3199                 if (unlikely(!p))
3200                         goto out_overflow;
3201                 xdr_decode_hyper(p, size);
3202                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3203                 ret = NFS_ATTR_FATTR_SIZE;
3204         }
3205         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3206         return ret;
3207 out_overflow:
3208         print_overflow_msg(__func__, xdr);
3209         return -EIO;
3210 }
3211
3212 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3213 {
3214         __be32 *p;
3215
3216         *res = 0;
3217         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3218                 return -EIO;
3219         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3220                 p = xdr_inline_decode(xdr, 4);
3221                 if (unlikely(!p))
3222                         goto out_overflow;
3223                 *res = be32_to_cpup(p);
3224                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3225         }
3226         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3227         return 0;
3228 out_overflow:
3229         print_overflow_msg(__func__, xdr);
3230         return -EIO;
3231 }
3232
3233 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3234 {
3235         __be32 *p;
3236
3237         *res = 0;
3238         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3239                 return -EIO;
3240         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3241                 p = xdr_inline_decode(xdr, 4);
3242                 if (unlikely(!p))
3243                         goto out_overflow;
3244                 *res = be32_to_cpup(p);
3245                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3246         }
3247         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3248         return 0;
3249 out_overflow:
3250         print_overflow_msg(__func__, xdr);
3251         return -EIO;
3252 }
3253
3254 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3255 {
3256         __be32 *p;
3257         int ret = 0;
3258
3259         fsid->major = 0;
3260         fsid->minor = 0;
3261         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3262                 return -EIO;
3263         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3264                 p = xdr_inline_decode(xdr, 16);
3265                 if (unlikely(!p))
3266                         goto out_overflow;
3267                 p = xdr_decode_hyper(p, &fsid->major);
3268                 xdr_decode_hyper(p, &fsid->minor);
3269                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3270                 ret = NFS_ATTR_FATTR_FSID;
3271         }
3272         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3273                         (unsigned long long)fsid->major,
3274                         (unsigned long long)fsid->minor);
3275         return ret;
3276 out_overflow:
3277         print_overflow_msg(__func__, xdr);
3278         return -EIO;
3279 }
3280
3281 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3282 {
3283         __be32 *p;
3284
3285         *res = 60;
3286         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3287                 return -EIO;
3288         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3289                 p = xdr_inline_decode(xdr, 4);
3290                 if (unlikely(!p))
3291                         goto out_overflow;
3292                 *res = be32_to_cpup(p);
3293                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3294         }
3295         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3296         return 0;
3297 out_overflow:
3298         print_overflow_msg(__func__, xdr);
3299         return -EIO;
3300 }
3301
3302 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3303 {
3304         __be32 *p;
3305
3306         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3307                 return -EIO;
3308         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3309                 p = xdr_inline_decode(xdr, 4);
3310                 if (unlikely(!p))
3311                         goto out_overflow;
3312                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3313                 *res = -be32_to_cpup(p);
3314         }
3315         return 0;
3316 out_overflow:
3317         print_overflow_msg(__func__, xdr);
3318         return -EIO;
3319 }
3320
3321 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3322 {
3323         __be32 *p;
3324         int len;
3325
3326         if (fh != NULL)
3327                 memset(fh, 0, sizeof(*fh));
3328
3329         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3330                 return -EIO;
3331         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3332                 p = xdr_inline_decode(xdr, 4);
3333                 if (unlikely(!p))
3334                         goto out_overflow;
3335                 len = be32_to_cpup(p);
3336                 if (len > NFS4_FHSIZE)
3337                         return -EIO;
3338                 p = xdr_inline_decode(xdr, len);
3339                 if (unlikely(!p))
3340                         goto out_overflow;
3341                 if (fh != NULL) {
3342                         memcpy(fh->data, p, len);
3343                         fh->size = len;
3344                 }
3345                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3346         }
3347         return 0;
3348 out_overflow:
3349         print_overflow_msg(__func__, xdr);
3350         return -EIO;
3351 }
3352
3353 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3354 {
3355         __be32 *p;
3356
3357         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3358         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3359                 return -EIO;
3360         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3361                 p = xdr_inline_decode(xdr, 4);
3362                 if (unlikely(!p))
3363                         goto out_overflow;
3364                 *res = be32_to_cpup(p);
3365                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3366         }
3367         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3368         return 0;
3369 out_overflow:
3370         print_overflow_msg(__func__, xdr);
3371         return -EIO;
3372 }
3373
3374 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3375 {
3376         __be32 *p;
3377         int ret = 0;
3378
3379         *fileid = 0;
3380         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3381                 return -EIO;
3382         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3383                 p = xdr_inline_decode(xdr, 8);
3384                 if (unlikely(!p))
3385                         goto out_overflow;
3386                 xdr_decode_hyper(p, fileid);
3387                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3388                 ret = NFS_ATTR_FATTR_FILEID;
3389         }
3390         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3391         return ret;
3392 out_overflow:
3393         print_overflow_msg(__func__, xdr);
3394         return -EIO;
3395 }
3396
3397 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3398 {
3399         __be32 *p;
3400         int ret = 0;
3401
3402         *fileid = 0;
3403         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3404                 return -EIO;
3405         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3406                 p = xdr_inline_decode(xdr, 8);
3407                 if (unlikely(!p))
3408                         goto out_overflow;
3409                 xdr_decode_hyper(p, fileid);
3410                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3411                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3412         }
3413         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3414         return ret;
3415 out_overflow:
3416         print_overflow_msg(__func__, xdr);
3417         return -EIO;
3418 }
3419
3420 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3421 {
3422         __be32 *p;
3423         int status = 0;
3424
3425         *res = 0;
3426         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3427                 return -EIO;
3428         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3429                 p = xdr_inline_decode(xdr, 8);
3430                 if (unlikely(!p))
3431                         goto out_overflow;
3432                 xdr_decode_hyper(p, res);
3433                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3434         }
3435         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3436         return status;
3437 out_overflow:
3438         print_overflow_msg(__func__, xdr);
3439         return -EIO;
3440 }
3441
3442 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3443 {
3444         __be32 *p;
3445         int status = 0;
3446
3447         *res = 0;
3448         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3449                 return -EIO;
3450         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3451                 p = xdr_inline_decode(xdr, 8);
3452                 if (unlikely(!p))
3453                         goto out_overflow;
3454                 xdr_decode_hyper(p, res);
3455                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3456         }
3457         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3458         return status;
3459 out_overflow:
3460         print_overflow_msg(__func__, xdr);
3461         return -EIO;
3462 }
3463
3464 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3465 {
3466         __be32 *p;
3467         int status = 0;
3468
3469         *res = 0;
3470         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3471                 return -EIO;
3472         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3473                 p = xdr_inline_decode(xdr, 8);
3474                 if (unlikely(!p))
3475                         goto out_overflow;
3476                 xdr_decode_hyper(p, res);
3477                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3478         }
3479         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3480         return status;
3481 out_overflow:
3482         print_overflow_msg(__func__, xdr);
3483         return -EIO;
3484 }
3485
3486 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3487 {
3488         u32 n;
3489         __be32 *p;
3490         int status = 0;
3491
3492         p = xdr_inline_decode(xdr, 4);
3493         if (unlikely(!p))
3494                 goto out_overflow;
3495         n = be32_to_cpup(p);
3496         if (n == 0)
3497                 goto root_path;
3498         dprintk("pathname4: ");
3499         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3500                 dprintk("cannot parse %d components in path\n", n);
3501                 goto out_eio;
3502         }
3503         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3504                 struct nfs4_string *component = &path->components[path->ncomponents];
3505                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3506                 if (unlikely(status != 0))
3507                         goto out_eio;
3508                 ifdebug (XDR)
3509                         pr_cont("%s%.*s ",
3510                                 (path->ncomponents != n ? "/ " : ""),
3511                                 component->len, component->data);
3512         }
3513 out:
3514         return status;
3515 root_path:
3516 /* a root pathname is sent as a zero component4 */
3517         path->ncomponents = 1;
3518         path->components[0].len=0;
3519         path->components[0].data=NULL;
3520         dprintk("pathname4: /\n");
3521         goto out;
3522 out_eio:
3523         dprintk(" status %d", status);
3524         status = -EIO;
3525         goto out;
3526 out_overflow:
3527         print_overflow_msg(__func__, xdr);
3528         return -EIO;
3529 }
3530
3531 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3532 {
3533         int n;
3534         __be32 *p;
3535         int status = -EIO;
3536
3537         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3538                 goto out;
3539         status = 0;
3540         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3541                 goto out;
3542         status = -EIO;
3543         /* Ignore borken servers that return unrequested attrs */
3544         if (unlikely(res == NULL))
3545                 goto out;
3546         dprintk("%s: fsroot:\n", __func__);
3547         status = decode_pathname(xdr, &res->fs_path);
3548         if (unlikely(status != 0))
3549                 goto out;
3550         p = xdr_inline_decode(xdr, 4);
3551         if (unlikely(!p))
3552                 goto out_overflow;
3553         n = be32_to_cpup(p);
3554         if (n <= 0)
3555                 goto out_eio;
3556         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3557                 u32 m;
3558                 struct nfs4_fs_location *loc;
3559
3560                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3561                         break;
3562                 loc = &res->locations[res->nlocations];
3563                 p = xdr_inline_decode(xdr, 4);
3564                 if (unlikely(!p))
3565                         goto out_overflow;
3566                 m = be32_to_cpup(p);
3567
3568                 dprintk("%s: servers:\n", __func__);
3569                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3570                         struct nfs4_string *server;
3571
3572                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3573                                 unsigned int i;
3574                                 dprintk("%s: using first %u of %u servers "
3575                                         "returned for location %u\n",
3576                                                 __func__,
3577                                                 NFS4_FS_LOCATION_MAXSERVERS,
3578                                                 m, res->nlocations);
3579                                 for (i = loc->nservers; i < m; i++) {
3580                                         unsigned int len;
3581                                         char *data;
3582                                         status = decode_opaque_inline(xdr, &len, &data);
3583                                         if (unlikely(status != 0))
3584                                                 goto out_eio;
3585                                 }
3586                                 break;
3587                         }
3588                         server = &loc->servers[loc->nservers];
3589                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3590                         if (unlikely(status != 0))
3591                                 goto out_eio;
3592                         dprintk("%s ", server->data);
3593                 }
3594                 status = decode_pathname(xdr, &loc->rootpath);
3595                 if (unlikely(status != 0))
3596                         goto out_eio;
3597         }
3598         if (res->nlocations != 0)
3599                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3600 out:
3601         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3602         return status;
3603 out_overflow:
3604         print_overflow_msg(__func__, xdr);
3605 out_eio:
3606         status = -EIO;
3607         goto out;
3608 }
3609
3610 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3611 {
3612         __be32 *p;
3613         int status = 0;
3614
3615         *res = 0;
3616         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3617                 return -EIO;
3618         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3619                 p = xdr_inline_decode(xdr, 8);
3620                 if (unlikely(!p))
3621                         goto out_overflow;
3622                 xdr_decode_hyper(p, res);
3623                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3624         }
3625         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3626         return status;
3627 out_overflow:
3628         print_overflow_msg(__func__, xdr);
3629         return -EIO;
3630 }
3631
3632 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3633 {
3634         __be32 *p;
3635         int status = 0;
3636
3637         *maxlink = 1;
3638         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3639                 return -EIO;
3640         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3641                 p = xdr_inline_decode(xdr, 4);
3642                 if (unlikely(!p))
3643                         goto out_overflow;
3644                 *maxlink = be32_to_cpup(p);
3645                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3646         }
3647         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3648         return status;
3649 out_overflow:
3650         print_overflow_msg(__func__, xdr);
3651         return -EIO;
3652 }
3653
3654 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3655 {
3656         __be32 *p;
3657         int status = 0;
3658
3659         *maxname = 1024;
3660         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3661                 return -EIO;
3662         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3663                 p = xdr_inline_decode(xdr, 4);
3664                 if (unlikely(!p))
3665                         goto out_overflow;
3666                 *maxname = be32_to_cpup(p);
3667                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3668         }
3669         dprintk("%s: maxname=%u\n", __func__, *maxname);
3670         return status;
3671 out_overflow:
3672         print_overflow_msg(__func__, xdr);
3673         return -EIO;
3674 }
3675
3676 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3677 {
3678         __be32 *p;
3679         int status = 0;
3680
3681         *res = 1024;
3682         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3683                 return -EIO;
3684         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3685                 uint64_t maxread;
3686                 p = xdr_inline_decode(xdr, 8);
3687                 if (unlikely(!p))
3688                         goto out_overflow;
3689                 xdr_decode_hyper(p, &maxread);
3690                 if (maxread > 0x7FFFFFFF)
3691                         maxread = 0x7FFFFFFF;
3692                 *res = (uint32_t)maxread;
3693                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3694         }
3695         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3696         return status;
3697 out_overflow:
3698         print_overflow_msg(__func__, xdr);
3699         return -EIO;
3700 }
3701
3702 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3703 {
3704         __be32 *p;
3705         int status = 0;
3706
3707         *res = 1024;
3708         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3709                 return -EIO;
3710         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3711                 uint64_t maxwrite;
3712                 p = xdr_inline_decode(xdr, 8);
3713                 if (unlikely(!p))
3714                         goto out_overflow;
3715                 xdr_decode_hyper(p, &maxwrite);
3716                 if (maxwrite > 0x7FFFFFFF)
3717                         maxwrite = 0x7FFFFFFF;
3718                 *res = (uint32_t)maxwrite;
3719                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3720         }
3721         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3722         return status;
3723 out_overflow:
3724         print_overflow_msg(__func__, xdr);
3725         return -EIO;
3726 }
3727
3728 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3729 {
3730         uint32_t tmp;
3731         __be32 *p;
3732         int ret = 0;
3733
3734         *mode = 0;
3735         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3736                 return -EIO;
3737         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3738                 p = xdr_inline_decode(xdr, 4);
3739                 if (unlikely(!p))
3740                         goto out_overflow;
3741                 tmp = be32_to_cpup(p);
3742                 *mode = tmp & ~S_IFMT;
3743                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3744                 ret = NFS_ATTR_FATTR_MODE;
3745         }
3746         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3747         return ret;
3748 out_overflow:
3749         print_overflow_msg(__func__, xdr);
3750         return -EIO;
3751 }
3752
3753 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3754 {
3755         __be32 *p;
3756         int ret = 0;
3757
3758         *nlink = 1;
3759         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3760                 return -EIO;
3761         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3762                 p = xdr_inline_decode(xdr, 4);
3763                 if (unlikely(!p))
3764                         goto out_overflow;
3765                 *nlink = be32_to_cpup(p);
3766                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3767                 ret = NFS_ATTR_FATTR_NLINK;
3768         }
3769         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3770         return ret;
3771 out_overflow:
3772         print_overflow_msg(__func__, xdr);
3773         return -EIO;
3774 }
3775
3776 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3777                 const struct nfs_server *server, kuid_t *uid,
3778                 struct nfs4_string *owner_name)
3779 {
3780         uint32_t len;
3781         __be32 *p;
3782         int ret = 0;
3783
3784         *uid = make_kuid(&init_user_ns, -2);
3785         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3786                 return -EIO;
3787         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3788                 p = xdr_inline_decode(xdr, 4);
3789                 if (unlikely(!p))
3790                         goto out_overflow;
3791                 len = be32_to_cpup(p);
3792                 p = xdr_inline_decode(xdr, len);
3793                 if (unlikely(!p))
3794                         goto out_overflow;
3795                 if (owner_name != NULL) {
3796                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3797                         if (owner_name->data != NULL) {
3798                                 owner_name->len = len;
3799                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3800                         }
3801                 } else if (len < XDR_MAX_NETOBJ) {
3802                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3803                                 ret = NFS_ATTR_FATTR_OWNER;
3804                         else
3805                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3806                                                 __func__);
3807                 } else
3808                         dprintk("%s: name too long (%u)!\n",
3809                                         __func__, len);
3810                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3811         }
3812         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3813         return ret;
3814 out_overflow:
3815         print_overflow_msg(__func__, xdr);
3816         return -EIO;
3817 }
3818
3819 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3820                 const struct nfs_server *server, kgid_t *gid,
3821                 struct nfs4_string *group_name)
3822 {
3823         uint32_t len;
3824         __be32 *p;
3825         int ret = 0;
3826
3827         *gid = make_kgid(&init_user_ns, -2);
3828         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3829                 return -EIO;
3830         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3831                 p = xdr_inline_decode(xdr, 4);
3832                 if (unlikely(!p))
3833                         goto out_overflow;
3834                 len = be32_to_cpup(p);
3835                 p = xdr_inline_decode(xdr, len);
3836                 if (unlikely(!p))
3837                         goto out_overflow;
3838                 if (group_name != NULL) {
3839                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3840                         if (group_name->data != NULL) {
3841                                 group_name->len = len;
3842                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3843                         }
3844                 } else if (len < XDR_MAX_NETOBJ) {
3845                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3846                                 ret = NFS_ATTR_FATTR_GROUP;
3847                         else
3848                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3849                                                 __func__);
3850                 } else
3851                         dprintk("%s: name too long (%u)!\n",
3852                                         __func__, len);
3853                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3854         }
3855         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3856         return ret;
3857 out_overflow:
3858         print_overflow_msg(__func__, xdr);
3859         return -EIO;
3860 }
3861
3862 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3863 {
3864         uint32_t major = 0, minor = 0;
3865         __be32 *p;
3866         int ret = 0;
3867
3868         *rdev = MKDEV(0,0);
3869         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3870                 return -EIO;
3871         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3872                 dev_t tmp;
3873
3874                 p = xdr_inline_decode(xdr, 8);
3875                 if (unlikely(!p))
3876                         goto out_overflow;
3877                 major = be32_to_cpup(p++);
3878                 minor = be32_to_cpup(p);
3879                 tmp = MKDEV(major, minor);
3880                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3881                         *rdev = tmp;
3882                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3883                 ret = NFS_ATTR_FATTR_RDEV;
3884         }
3885         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3886         return ret;
3887 out_overflow:
3888         print_overflow_msg(__func__, xdr);
3889         return -EIO;
3890 }
3891
3892 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3893 {
3894         __be32 *p;
3895         int status = 0;
3896
3897         *res = 0;
3898         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3899                 return -EIO;
3900         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3901                 p = xdr_inline_decode(xdr, 8);
3902                 if (unlikely(!p))
3903                         goto out_overflow;
3904                 xdr_decode_hyper(p, res);
3905                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3906         }
3907         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3908         return status;
3909 out_overflow:
3910         print_overflow_msg(__func__, xdr);
3911         return -EIO;
3912 }
3913
3914 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3915 {
3916         __be32 *p;
3917         int status = 0;
3918
3919         *res = 0;
3920         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3921                 return -EIO;
3922         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3923                 p = xdr_inline_decode(xdr, 8);
3924                 if (unlikely(!p))
3925                         goto out_overflow;
3926                 xdr_decode_hyper(p, res);
3927                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3928         }
3929         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3930         return status;
3931 out_overflow:
3932         print_overflow_msg(__func__, xdr);
3933         return -EIO;
3934 }
3935
3936 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3937 {
3938         __be32 *p;
3939         int status = 0;
3940
3941         *res = 0;
3942         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3943                 return -EIO;
3944         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3945                 p = xdr_inline_decode(xdr, 8);
3946                 if (unlikely(!p))
3947                         goto out_overflow;
3948                 xdr_decode_hyper(p, res);
3949                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3950         }
3951         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3952         return status;
3953 out_overflow:
3954         print_overflow_msg(__func__, xdr);
3955         return -EIO;
3956 }
3957
3958 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3959 {
3960         __be32 *p;
3961         int ret = 0;
3962
3963         *used = 0;
3964         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3965                 return -EIO;
3966         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3967                 p = xdr_inline_decode(xdr, 8);
3968                 if (unlikely(!p))
3969                         goto out_overflow;
3970                 xdr_decode_hyper(p, used);
3971                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3972                 ret = NFS_ATTR_FATTR_SPACE_USED;
3973         }
3974         dprintk("%s: space used=%Lu\n", __func__,
3975                         (unsigned long long)*used);
3976         return ret;
3977 out_overflow:
3978         print_overflow_msg(__func__, xdr);
3979         return -EIO;
3980 }
3981
3982 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3983 {
3984         __be32 *p;
3985         uint64_t sec;
3986         uint32_t nsec;
3987
3988         p = xdr_inline_decode(xdr, 12);
3989         if (unlikely(!p))
3990                 goto out_overflow;
3991         p = xdr_decode_hyper(p, &sec);
3992         nsec = be32_to_cpup(p);
3993         time->tv_sec = (time_t)sec;
3994         time->tv_nsec = (long)nsec;
3995         return 0;
3996 out_overflow:
3997         print_overflow_msg(__func__, xdr);
3998         return -EIO;
3999 }
4000
4001 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4002 {
4003         int status = 0;
4004
4005         time->tv_sec = 0;
4006         time->tv_nsec = 0;
4007         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4008                 return -EIO;
4009         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4010                 status = decode_attr_time(xdr, time);
4011                 if (status == 0)
4012                         status = NFS_ATTR_FATTR_ATIME;
4013                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4014         }
4015         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4016         return status;
4017 }
4018
4019 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4020 {
4021         int status = 0;
4022
4023         time->tv_sec = 0;
4024         time->tv_nsec = 0;
4025         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4026                 return -EIO;
4027         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4028                 status = decode_attr_time(xdr, time);
4029                 if (status == 0)
4030                         status = NFS_ATTR_FATTR_CTIME;
4031                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4032         }
4033         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4034         return status;
4035 }
4036
4037 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4038                                   struct timespec *time)
4039 {
4040         int status = 0;
4041
4042         time->tv_sec = 0;
4043         time->tv_nsec = 0;
4044         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4045                 return -EIO;
4046         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4047                 status = decode_attr_time(xdr, time);
4048                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4049         }
4050         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4051                 (long)time->tv_nsec);
4052         return status;
4053 }
4054
4055 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4056 {
4057         int status = 0;
4058
4059         time->tv_sec = 0;
4060         time->tv_nsec = 0;
4061         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4062                 return -EIO;
4063         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4064                 status = decode_attr_time(xdr, time);
4065                 if (status == 0)
4066                         status = NFS_ATTR_FATTR_MTIME;
4067                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4068         }
4069         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4070         return status;
4071 }
4072
4073 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4074 {
4075         unsigned int attrwords = XDR_QUADLEN(attrlen);
4076         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4077
4078         if (unlikely(attrwords != nwords)) {
4079                 dprintk("%s: server returned incorrect attribute length: "
4080                         "%u %c %u\n",
4081                                 __func__,
4082                                 attrwords << 2,
4083                                 (attrwords < nwords) ? '<' : '>',
4084                                 nwords << 2);
4085                 return -EIO;
4086         }
4087         return 0;
4088 }
4089
4090 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4091 {
4092         __be32 *p;
4093
4094         p = xdr_inline_decode(xdr, 20);
4095         if (unlikely(!p))
4096                 goto out_overflow;
4097         cinfo->atomic = be32_to_cpup(p++);
4098         p = xdr_decode_hyper(p, &cinfo->before);
4099         xdr_decode_hyper(p, &cinfo->after);
4100         return 0;
4101 out_overflow:
4102         print_overflow_msg(__func__, xdr);
4103         return -EIO;
4104 }
4105
4106 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4107 {
4108         __be32 *p;
4109         uint32_t supp, acc;
4110         int status;
4111
4112         status = decode_op_hdr(xdr, OP_ACCESS);
4113         if (status)
4114                 return status;
4115         p = xdr_inline_decode(xdr, 8);
4116         if (unlikely(!p))
4117                 goto out_overflow;
4118         supp = be32_to_cpup(p++);
4119         acc = be32_to_cpup(p);
4120         *supported = supp;
4121         *access = acc;
4122         return 0;
4123 out_overflow:
4124         print_overflow_msg(__func__, xdr);
4125         return -EIO;
4126 }
4127
4128 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4129 {
4130         __be32 *p;
4131
4132         p = xdr_inline_decode(xdr, len);
4133         if (likely(p)) {
4134                 memcpy(buf, p, len);
4135                 return 0;
4136         }
4137         print_overflow_msg(__func__, xdr);
4138         return -EIO;
4139 }
4140
4141 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4142 {
4143         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4144 }
4145
4146 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4147 {
4148         int status;
4149
4150         status = decode_op_hdr(xdr, OP_CLOSE);
4151         if (status != -EIO)
4152                 nfs_increment_open_seqid(status, res->seqid);
4153         if (!status)
4154                 status = decode_stateid(xdr, &res->stateid);
4155         return status;
4156 }
4157
4158 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4159 {
4160         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4161 }
4162
4163 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4164 {
4165         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4166 }
4167
4168 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4169 {
4170         int status;
4171
4172         status = decode_op_hdr(xdr, OP_COMMIT);
4173         if (!status)
4174                 status = decode_write_verifier(xdr, &res->verf->verifier);
4175         return status;
4176 }
4177
4178 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4179 {
4180         __be32 *p;
4181         uint32_t bmlen;
4182         int status;
4183
4184         status = decode_op_hdr(xdr, OP_CREATE);
4185         if (status)
4186                 return status;
4187         if ((status = decode_change_info(xdr, cinfo)))
4188                 return status;
4189         p = xdr_inline_decode(xdr, 4);
4190         if (unlikely(!p))
4191                 goto out_overflow;
4192         bmlen = be32_to_cpup(p);
4193         p = xdr_inline_decode(xdr, bmlen << 2);
4194         if (likely(p))
4195                 return 0;
4196 out_overflow:
4197         print_overflow_msg(__func__, xdr);
4198         return -EIO;
4199 }
4200
4201 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4202 {
4203         unsigned int savep;
4204         uint32_t attrlen, bitmap[3] = {0};
4205         int status;
4206
4207         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4208                 goto xdr_error;
4209         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4210                 goto xdr_error;
4211         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4212                 goto xdr_error;
4213         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4214                 goto xdr_error;
4215         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4216                                                  &res->fh_expire_type)) != 0)
4217                 goto xdr_error;
4218         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4219                 goto xdr_error;
4220         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4221                 goto xdr_error;
4222         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4223                 goto xdr_error;
4224         status = verify_attr_len(xdr, savep, attrlen);
4225 xdr_error:
4226         dprintk("%s: xdr returned %d!\n", __func__, -status);
4227         return status;
4228 }
4229
4230 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4231 {
4232         unsigned int savep;
4233         uint32_t attrlen, bitmap[3] = {0};
4234         int status;
4235
4236         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4237                 goto xdr_error;
4238         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4239                 goto xdr_error;
4240         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4241                 goto xdr_error;
4242
4243         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4244                 goto xdr_error;
4245         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4246                 goto xdr_error;
4247         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4248                 goto xdr_error;
4249         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4250                 goto xdr_error;
4251         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4252                 goto xdr_error;
4253         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4254                 goto xdr_error;
4255
4256         status = verify_attr_len(xdr, savep, attrlen);
4257 xdr_error:
4258         dprintk("%s: xdr returned %d!\n", __func__, -status);
4259         return status;
4260 }
4261
4262 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4263 {
4264         unsigned int savep;
4265         uint32_t attrlen, bitmap[3] = {0};
4266         int status;
4267
4268         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4269                 goto xdr_error;
4270         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4271                 goto xdr_error;
4272         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4273                 goto xdr_error;
4274
4275         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4276                 goto xdr_error;
4277         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4278                 goto xdr_error;
4279
4280         status = verify_attr_len(xdr, savep, attrlen);
4281 xdr_error:
4282         dprintk("%s: xdr returned %d!\n", __func__, -status);
4283         return status;
4284 }
4285
4286 static int decode_threshold_hint(struct xdr_stream *xdr,
4287                                   uint32_t *bitmap,
4288                                   uint64_t *res,
4289                                   uint32_t hint_bit)
4290 {
4291         __be32 *p;
4292
4293         *res = 0;
4294         if (likely(bitmap[0] & hint_bit)) {
4295                 p = xdr_inline_decode(xdr, 8);
4296                 if (unlikely(!p))
4297                         goto out_overflow;
4298                 xdr_decode_hyper(p, res);
4299         }
4300         return 0;
4301 out_overflow:
4302         print_overflow_msg(__func__, xdr);
4303         return -EIO;
4304 }
4305
4306 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4307                                         struct nfs4_threshold *res)
4308 {
4309         __be32 *p;
4310         unsigned int savep;
4311         uint32_t bitmap[3] = {0,}, attrlen;
4312         int status;
4313
4314         /* layout type */
4315         p = xdr_inline_decode(xdr, 4);
4316         if (unlikely(!p)) {
4317                 print_overflow_msg(__func__, xdr);
4318                 return -EIO;
4319         }
4320         res->l_type = be32_to_cpup(p);
4321
4322         /* thi_hintset bitmap */
4323         status = decode_attr_bitmap(xdr, bitmap);
4324         if (status < 0)
4325                 goto xdr_error;
4326
4327         /* thi_hintlist length */
4328         status = decode_attr_length(xdr, &attrlen, &savep);
4329         if (status < 0)
4330                 goto xdr_error;
4331         /* thi_hintlist */
4332         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4333         if (status < 0)
4334                 goto xdr_error;
4335         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4336         if (status < 0)
4337                 goto xdr_error;
4338         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4339                                        THRESHOLD_RD_IO);
4340         if (status < 0)
4341                 goto xdr_error;
4342         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4343                                        THRESHOLD_WR_IO);
4344         if (status < 0)
4345                 goto xdr_error;
4346
4347         status = verify_attr_len(xdr, savep, attrlen);
4348         res->bm = bitmap[0];
4349
4350         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4351                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4352                 res->wr_io_sz);
4353 xdr_error:
4354         dprintk("%s ret=%d!\n", __func__, status);
4355         return status;
4356 }
4357
4358 /*
4359  * Thresholds on pNFS direct I/O vrs MDS I/O
4360  */
4361 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4362                                     uint32_t *bitmap,
4363                                     struct nfs4_threshold *res)
4364 {
4365         __be32 *p;
4366         int status = 0;
4367         uint32_t num;
4368
4369         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4370                 return -EIO;
4371         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4372                 /* Did the server return an unrequested attribute? */
4373                 if (unlikely(res == NULL))
4374                         return -EREMOTEIO;
4375                 p = xdr_inline_decode(xdr, 4);
4376                 if (unlikely(!p))
4377                         goto out_overflow;
4378                 num = be32_to_cpup(p);
4379                 if (num == 0)
4380                         return 0;
4381                 if (num > 1)
4382                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4383                                 "drivers per filesystem not supported\n",
4384                                 __func__);
4385
4386                 status = decode_first_threshold_item4(xdr, res);
4387                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4388         }
4389         return status;
4390 out_overflow:
4391         print_overflow_msg(__func__, xdr);
4392         return -EIO;
4393 }
4394
4395 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4396                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4397                 struct nfs4_fs_locations *fs_loc,
4398                 const struct nfs_server *server)
4399 {
4400         int status;
4401         umode_t fmode = 0;
4402         uint32_t type;
4403         int32_t err;
4404
4405         status = decode_attr_type(xdr, bitmap, &type);
4406         if (status < 0)
4407                 goto xdr_error;
4408         fattr->mode = 0;
4409         if (status != 0) {
4410                 fattr->mode |= nfs_type2fmt[type];
4411                 fattr->valid |= status;
4412         }
4413
4414         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4415         if (status < 0)
4416                 goto xdr_error;
4417         fattr->valid |= status;
4418
4419         status = decode_attr_size(xdr, bitmap, &fattr->size);
4420         if (status < 0)
4421                 goto xdr_error;
4422         fattr->valid |= status;
4423
4424         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4425         if (status < 0)
4426                 goto xdr_error;
4427         fattr->valid |= status;
4428
4429         err = 0;
4430         status = decode_attr_error(xdr, bitmap, &err);
4431         if (status < 0)
4432                 goto xdr_error;
4433
4434         status = decode_attr_filehandle(xdr, bitmap, fh);
4435         if (status < 0)
4436                 goto xdr_error;
4437
4438         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4439         if (status < 0)
4440                 goto xdr_error;
4441         fattr->valid |= status;
4442
4443         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4444         if (status < 0)
4445                 goto xdr_error;
4446         fattr->valid |= status;
4447
4448         status = decode_attr_mode(xdr, bitmap, &fmode);
4449         if (status < 0)
4450                 goto xdr_error;
4451         if (status != 0) {
4452                 fattr->mode |= fmode;
4453                 fattr->valid |= status;
4454         }
4455
4456         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4457         if (status < 0)
4458                 goto xdr_error;
4459         fattr->valid |= status;
4460
4461         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4462         if (status < 0)
4463                 goto xdr_error;
4464         fattr->valid |= status;
4465
4466         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4467         if (status < 0)
4468                 goto xdr_error;
4469         fattr->valid |= status;
4470
4471         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4472         if (status < 0)
4473                 goto xdr_error;
4474         fattr->valid |= status;
4475
4476         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4477         if (status < 0)
4478                 goto xdr_error;
4479         fattr->valid |= status;
4480
4481         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4482         if (status < 0)
4483                 goto xdr_error;
4484         fattr->valid |= status;
4485
4486         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4487         if (status < 0)
4488                 goto xdr_error;
4489         fattr->valid |= status;
4490
4491         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4492         if (status < 0)
4493                 goto xdr_error;
4494         fattr->valid |= status;
4495
4496         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4497         if (status < 0)
4498                 goto xdr_error;
4499         fattr->valid |= status;
4500
4501         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4502         if (status < 0)
4503                 goto xdr_error;
4504
4505 xdr_error:
4506         dprintk("%s: xdr returned %d\n", __func__, -status);
4507         return status;
4508 }
4509
4510 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4511                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4512                 const struct nfs_server *server)
4513 {
4514         unsigned int savep;
4515         uint32_t attrlen,
4516                  bitmap[3] = {0};
4517         int status;
4518
4519         status = decode_op_hdr(xdr, OP_GETATTR);
4520         if (status < 0)
4521                 goto xdr_error;
4522
4523         status = decode_attr_bitmap(xdr, bitmap);
4524         if (status < 0)
4525                 goto xdr_error;
4526
4527         status = decode_attr_length(xdr, &attrlen, &savep);
4528         if (status < 0)
4529                 goto xdr_error;
4530
4531         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4532         if (status < 0)
4533                 goto xdr_error;
4534
4535         status = verify_attr_len(xdr, savep, attrlen);
4536 xdr_error:
4537         dprintk("%s: xdr returned %d\n", __func__, -status);
4538         return status;
4539 }
4540
4541 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4542                 const struct nfs_server *server)
4543 {
4544         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4545 }
4546
4547 /*
4548  * Decode potentially multiple layout types. Currently we only support
4549  * one layout driver per file system.
4550  */
4551 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4552                                          uint32_t *layouttype)
4553 {
4554         uint32_t *p;
4555         int num;
4556
4557         p = xdr_inline_decode(xdr, 4);
4558         if (unlikely(!p))
4559                 goto out_overflow;
4560         num = be32_to_cpup(p);
4561
4562         /* pNFS is not supported by the underlying file system */
4563         if (num == 0) {
4564                 *layouttype = 0;
4565                 return 0;
4566         }
4567         if (num > 1)
4568                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4569                         "drivers per filesystem not supported\n", __func__);
4570
4571         /* Decode and set first layout type, move xdr->p past unused types */
4572         p = xdr_inline_decode(xdr, num * 4);
4573         if (unlikely(!p))
4574                 goto out_overflow;
4575         *layouttype = be32_to_cpup(p);
4576         return 0;
4577 out_overflow:
4578         print_overflow_msg(__func__, xdr);
4579         return -EIO;
4580 }
4581
4582 /*
4583  * The type of file system exported.
4584  * Note we must ensure that layouttype is set in any non-error case.
4585  */
4586 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4587                                 uint32_t *layouttype)
4588 {
4589         int status = 0;
4590
4591         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4592         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4593                 return -EIO;
4594         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4595                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4596                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4597         } else
4598                 *layouttype = 0;
4599         return status;
4600 }
4601
4602 /*
4603  * The prefered block size for layout directed io
4604  */
4605 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4606                                       uint32_t *res)
4607 {
4608         __be32 *p;
4609
4610         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4611         *res = 0;
4612         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4613                 p = xdr_inline_decode(xdr, 4);
4614                 if (unlikely(!p)) {
4615                         print_overflow_msg(__func__, xdr);
4616                         return -EIO;
4617                 }
4618                 *res = be32_to_cpup(p);
4619                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4620         }
4621         return 0;
4622 }
4623
4624 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4625 {
4626         unsigned int savep;
4627         uint32_t attrlen, bitmap[3];
4628         int status;
4629
4630         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4631                 goto xdr_error;
4632         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4633                 goto xdr_error;
4634         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4635                 goto xdr_error;
4636
4637         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4638
4639         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4640                 goto xdr_error;
4641         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4642                 goto xdr_error;
4643         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4644                 goto xdr_error;
4645         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4646         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4647                 goto xdr_error;
4648         fsinfo->wtpref = fsinfo->wtmax;
4649         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4650         if (status != 0)
4651                 goto xdr_error;
4652         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4653         if (status != 0)
4654                 goto xdr_error;
4655         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4656         if (status)
4657                 goto xdr_error;
4658
4659         status = verify_attr_len(xdr, savep, attrlen);
4660 xdr_error:
4661         dprintk("%s: xdr returned %d!\n", __func__, -status);
4662         return status;
4663 }
4664
4665 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4666 {
4667         __be32 *p;
4668         uint32_t len;
4669         int status;
4670
4671         /* Zero handle first to allow comparisons */
4672         memset(fh, 0, sizeof(*fh));
4673
4674         status = decode_op_hdr(xdr, OP_GETFH);
4675         if (status)
4676                 return status;
4677
4678         p = xdr_inline_decode(xdr, 4);
4679         if (unlikely(!p))
4680                 goto out_overflow;
4681         len = be32_to_cpup(p);
4682         if (len > NFS4_FHSIZE)
4683                 return -EIO;
4684         fh->size = len;
4685         p = xdr_inline_decode(xdr, len);
4686         if (unlikely(!p))
4687                 goto out_overflow;
4688         memcpy(fh->data, p, len);
4689         return 0;
4690 out_overflow:
4691         print_overflow_msg(__func__, xdr);
4692         return -EIO;
4693 }
4694
4695 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4696 {
4697         int status;
4698
4699         status = decode_op_hdr(xdr, OP_LINK);
4700         if (status)
4701                 return status;
4702         return decode_change_info(xdr, cinfo);
4703 }
4704
4705 /*
4706  * We create the owner, so we know a proper owner.id length is 4.
4707  */
4708 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4709 {
4710         uint64_t offset, length, clientid;
4711         __be32 *p;
4712         uint32_t namelen, type;
4713
4714         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4715         if (unlikely(!p))
4716                 goto out_overflow;
4717         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4718         p = xdr_decode_hyper(p, &length);
4719         type = be32_to_cpup(p++); /* 4 byte read */
4720         if (fl != NULL) { /* manipulate file lock */
4721                 fl->fl_start = (loff_t)offset;
4722                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4723                 if (length == ~(uint64_t)0)
4724                         fl->fl_end = OFFSET_MAX;
4725                 fl->fl_type = F_WRLCK;
4726                 if (type & 1)
4727                         fl->fl_type = F_RDLCK;
4728                 fl->fl_pid = 0;
4729         }
4730         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4731         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4732         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4733         if (likely(p))
4734                 return -NFS4ERR_DENIED;
4735 out_overflow:
4736         print_overflow_msg(__func__, xdr);
4737         return -EIO;
4738 }
4739
4740 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4741 {
4742         int status;
4743
4744         status = decode_op_hdr(xdr, OP_LOCK);
4745         if (status == -EIO)
4746                 goto out;
4747         if (status == 0) {
4748                 status = decode_stateid(xdr, &res->stateid);
4749                 if (unlikely(status))
4750                         goto out;
4751         } else if (status == -NFS4ERR_DENIED)
4752                 status = decode_lock_denied(xdr, NULL);
4753         if (res->open_seqid != NULL)
4754                 nfs_increment_open_seqid(status, res->open_seqid);
4755         nfs_increment_lock_seqid(status, res->lock_seqid);
4756 out:
4757         return status;
4758 }
4759
4760 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4761 {
4762         int status;
4763         status = decode_op_hdr(xdr, OP_LOCKT);
4764         if (status == -NFS4ERR_DENIED)
4765                 return decode_lock_denied(xdr, res->denied);
4766         return status;
4767 }
4768
4769 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4770 {
4771         int status;
4772
4773         status = decode_op_hdr(xdr, OP_LOCKU);
4774         if (status != -EIO)
4775                 nfs_increment_lock_seqid(status, res->seqid);
4776         if (status == 0)
4777                 status = decode_stateid(xdr, &res->stateid);
4778         return status;
4779 }
4780
4781 static int decode_release_lockowner(struct xdr_stream *xdr)
4782 {
4783         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4784 }
4785
4786 static int decode_lookup(struct xdr_stream *xdr)
4787 {
4788         return decode_op_hdr(xdr, OP_LOOKUP);
4789 }
4790
4791 /* This is too sick! */
4792 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4793 {
4794         __be32 *p;
4795         uint32_t limit_type, nblocks, blocksize;
4796
4797         p = xdr_inline_decode(xdr, 12);
4798         if (unlikely(!p))
4799                 goto out_overflow;
4800         limit_type = be32_to_cpup(p++);
4801         switch (limit_type) {
4802         case 1:
4803                 xdr_decode_hyper(p, maxsize);
4804                 break;
4805         case 2:
4806                 nblocks = be32_to_cpup(p++);
4807                 blocksize = be32_to_cpup(p);
4808                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4809         }
4810         return 0;
4811 out_overflow:
4812         print_overflow_msg(__func__, xdr);
4813         return -EIO;
4814 }
4815
4816 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4817 {
4818         __be32 *p;
4819         uint32_t delegation_type;
4820         int status;
4821
4822         p = xdr_inline_decode(xdr, 4);
4823         if (unlikely(!p))
4824                 goto out_overflow;
4825         delegation_type = be32_to_cpup(p);
4826         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4827                 res->delegation_type = 0;
4828                 return 0;
4829         }
4830         status = decode_stateid(xdr, &res->delegation);
4831         if (unlikely(status))
4832                 return status;
4833         p = xdr_inline_decode(xdr, 4);
4834         if (unlikely(!p))
4835                 goto out_overflow;
4836         res->do_recall = be32_to_cpup(p);
4837
4838         switch (delegation_type) {
4839         case NFS4_OPEN_DELEGATE_READ:
4840                 res->delegation_type = FMODE_READ;
4841                 break;
4842         case NFS4_OPEN_DELEGATE_WRITE:
4843                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4844                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4845                                 return -EIO;
4846         }
4847         return decode_ace(xdr, NULL, res->server->nfs_client);
4848 out_overflow:
4849         print_overflow_msg(__func__, xdr);
4850         return -EIO;
4851 }
4852
4853 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4854 {
4855         __be32 *p;
4856         uint32_t savewords, bmlen, i;
4857         int status;
4858
4859         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
4860                 return status;
4861         nfs_increment_open_seqid(status, res->seqid);
4862         if (status)
4863                 return status;
4864         status = decode_stateid(xdr, &res->stateid);
4865         if (unlikely(status))
4866                 return status;
4867
4868         decode_change_info(xdr, &res->cinfo);
4869
4870         p = xdr_inline_decode(xdr, 8);
4871         if (unlikely(!p))
4872                 goto out_overflow;
4873         res->rflags = be32_to_cpup(p++);
4874         bmlen = be32_to_cpup(p);
4875         if (bmlen > 10)
4876                 goto xdr_error;
4877
4878         p = xdr_inline_decode(xdr, bmlen << 2);
4879         if (unlikely(!p))
4880                 goto out_overflow;
4881         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4882         for (i = 0; i < savewords; ++i)
4883                 res->attrset[i] = be32_to_cpup(p++);
4884         for (; i < NFS4_BITMAP_SIZE; i++)
4885                 res->attrset[i] = 0;
4886
4887         return decode_delegation(xdr, res);
4888 xdr_error:
4889         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4890         return -EIO;
4891 out_overflow:
4892         print_overflow_msg(__func__, xdr);
4893         return -EIO;
4894 }
4895
4896 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4897 {
4898         int status;
4899
4900         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4901         if (status != -EIO)
4902                 nfs_increment_open_seqid(status, res->seqid);
4903         if (!status)
4904                 status = decode_stateid(xdr, &res->stateid);
4905         return status;
4906 }
4907
4908 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4909 {
4910         int status;
4911
4912         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4913         if (status != -EIO)
4914                 nfs_increment_open_seqid(status, res->seqid);
4915         if (!status)
4916                 status = decode_stateid(xdr, &res->stateid);
4917         return status;
4918 }
4919
4920 static int decode_putfh(struct xdr_stream *xdr)
4921 {
4922         return decode_op_hdr(xdr, OP_PUTFH);
4923 }
4924
4925 static int decode_putrootfh(struct xdr_stream *xdr)
4926 {
4927         return decode_op_hdr(xdr, OP_PUTROOTFH);
4928 }
4929
4930 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4931 {
4932         __be32 *p;
4933         uint32_t count, eof, recvd;
4934         int status;
4935
4936         status = decode_op_hdr(xdr, OP_READ);
4937         if (status)
4938                 return status;
4939         p = xdr_inline_decode(xdr, 8);
4940         if (unlikely(!p))
4941                 goto out_overflow;
4942         eof = be32_to_cpup(p++);
4943         count = be32_to_cpup(p);
4944         recvd = xdr_read_pages(xdr, count);
4945         if (count > recvd) {
4946                 dprintk("NFS: server cheating in read reply: "
4947                                 "count %u > recvd %u\n", count, recvd);
4948                 count = recvd;
4949                 eof = 0;
4950         }
4951         res->eof = eof;
4952         res->count = count;
4953         return 0;
4954 out_overflow:
4955         print_overflow_msg(__func__, xdr);
4956         return -EIO;
4957 }
4958
4959 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4960 {
4961         int             status;
4962         __be32          verf[2];
4963
4964         status = decode_op_hdr(xdr, OP_READDIR);
4965         if (!status)
4966                 status = decode_verifier(xdr, readdir->verifier.data);
4967         if (unlikely(status))
4968                 return status;
4969         memcpy(verf, readdir->verifier.data, sizeof(verf));
4970         dprintk("%s: verifier = %08x:%08x\n",
4971                         __func__, verf[0], verf[1]);
4972         return xdr_read_pages(xdr, xdr->buf->page_len);
4973 }
4974
4975 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4976 {
4977         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4978         u32 len, recvd;
4979         __be32 *p;
4980         int status;
4981
4982         status = decode_op_hdr(xdr, OP_READLINK);
4983         if (status)
4984                 return status;
4985
4986         /* Convert length of symlink */
4987         p = xdr_inline_decode(xdr, 4);
4988         if (unlikely(!p))
4989                 goto out_overflow;
4990         len = be32_to_cpup(p);
4991         if (len >= rcvbuf->page_len || len <= 0) {
4992                 dprintk("nfs: server returned giant symlink!\n");
4993                 return -ENAMETOOLONG;
4994         }
4995         recvd = xdr_read_pages(xdr, len);
4996         if (recvd < len) {
4997                 dprintk("NFS: server cheating in readlink reply: "
4998                                 "count %u > recvd %u\n", len, recvd);
4999                 return -EIO;
5000         }
5001         /*
5002          * The XDR encode routine has set things up so that
5003          * the link text will be copied directly into the
5004          * buffer.  We just have to do overflow-checking,
5005          * and and null-terminate the text (the VFS expects
5006          * null-termination).
5007          */
5008         xdr_terminate_string(rcvbuf, len);
5009         return 0;
5010 out_overflow:
5011         print_overflow_msg(__func__, xdr);
5012         return -EIO;
5013 }
5014
5015 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5016 {
5017         int status;
5018
5019         status = decode_op_hdr(xdr, OP_REMOVE);
5020         if (status)
5021                 goto out;
5022         status = decode_change_info(xdr, cinfo);
5023 out:
5024         return status;
5025 }
5026
5027 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5028               struct nfs4_change_info *new_cinfo)
5029 {
5030         int status;
5031
5032         status = decode_op_hdr(xdr, OP_RENAME);
5033         if (status)
5034                 goto out;
5035         if ((status = decode_change_info(xdr, old_cinfo)))
5036                 goto out;
5037         status = decode_change_info(xdr, new_cinfo);
5038 out:
5039         return status;
5040 }
5041
5042 static int decode_renew(struct xdr_stream *xdr)
5043 {
5044         return decode_op_hdr(xdr, OP_RENEW);
5045 }
5046
5047 static int
5048 decode_restorefh(struct xdr_stream *xdr)
5049 {
5050         return decode_op_hdr(xdr, OP_RESTOREFH);
5051 }
5052
5053 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5054                          struct nfs_getaclres *res)
5055 {
5056         unsigned int savep;
5057         uint32_t attrlen,
5058                  bitmap[3] = {0};
5059         int status;
5060         unsigned int pg_offset;
5061
5062         res->acl_len = 0;
5063         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5064                 goto out;
5065
5066         xdr_enter_page(xdr, xdr->buf->page_len);
5067
5068         /* Calculate the offset of the page data */
5069         pg_offset = xdr->buf->head[0].iov_len;
5070
5071         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5072                 goto out;
5073         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5074                 goto out;
5075
5076         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5077                 return -EIO;
5078         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5079
5080                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5081                  * are stored with the acl data to handle the problem of
5082                  * variable length bitmaps.*/
5083                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5084                 res->acl_len = attrlen;
5085
5086                 /* Check for receive buffer overflow */
5087                 if (res->acl_len > (xdr->nwords << 2) ||
5088                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5089                         res->acl_flags |= NFS4_ACL_TRUNC;
5090                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5091                                         attrlen, xdr->nwords << 2);
5092                 }
5093         } else
5094                 status = -EOPNOTSUPP;
5095
5096 out:
5097         return status;
5098 }
5099
5100 static int
5101 decode_savefh(struct xdr_stream *xdr)
5102 {
5103         return decode_op_hdr(xdr, OP_SAVEFH);
5104 }
5105
5106 static int decode_setattr(struct xdr_stream *xdr)
5107 {
5108         __be32 *p;
5109         uint32_t bmlen;
5110         int status;
5111
5112         status = decode_op_hdr(xdr, OP_SETATTR);
5113         if (status)
5114                 return status;
5115         p = xdr_inline_decode(xdr, 4);
5116         if (unlikely(!p))
5117                 goto out_overflow;
5118         bmlen = be32_to_cpup(p);
5119         p = xdr_inline_decode(xdr, bmlen << 2);
5120         if (likely(p))
5121                 return 0;
5122 out_overflow:
5123         print_overflow_msg(__func__, xdr);
5124         return -EIO;
5125 }
5126
5127 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5128 {
5129         __be32 *p;
5130         uint32_t opnum;
5131         int32_t nfserr;
5132
5133         p = xdr_inline_decode(xdr, 8);
5134         if (unlikely(!p))
5135                 goto out_overflow;
5136         opnum = be32_to_cpup(p++);
5137         if (opnum != OP_SETCLIENTID) {
5138                 dprintk("nfs: decode_setclientid: Server returned operation"
5139                         " %d\n", opnum);
5140                 return -EIO;
5141         }
5142         nfserr = be32_to_cpup(p);
5143         if (nfserr == NFS_OK) {
5144                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5145                 if (unlikely(!p))
5146                         goto out_overflow;
5147                 p = xdr_decode_hyper(p, &res->clientid);
5148                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5149         } else if (nfserr == NFSERR_CLID_INUSE) {
5150                 uint32_t len;
5151
5152                 /* skip netid string */
5153                 p = xdr_inline_decode(xdr, 4);
5154                 if (unlikely(!p))
5155                         goto out_overflow;
5156                 len = be32_to_cpup(p);
5157                 p = xdr_inline_decode(xdr, len);
5158                 if (unlikely(!p))
5159                         goto out_overflow;
5160
5161                 /* skip uaddr string */
5162                 p = xdr_inline_decode(xdr, 4);
5163                 if (unlikely(!p))
5164                         goto out_overflow;
5165                 len = be32_to_cpup(p);
5166                 p = xdr_inline_decode(xdr, len);
5167                 if (unlikely(!p))
5168                         goto out_overflow;
5169                 return -NFSERR_CLID_INUSE;
5170         } else
5171                 return nfs4_stat_to_errno(nfserr);
5172
5173         return 0;
5174 out_overflow:
5175         print_overflow_msg(__func__, xdr);
5176         return -EIO;
5177 }
5178
5179 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5180 {
5181         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5182 }
5183
5184 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5185 {
5186         __be32 *p;
5187         int status;
5188
5189         status = decode_op_hdr(xdr, OP_WRITE);
5190         if (status)
5191                 return status;
5192
5193         p = xdr_inline_decode(xdr, 8);
5194         if (unlikely(!p))
5195                 goto out_overflow;
5196         res->count = be32_to_cpup(p++);
5197         res->verf->committed = be32_to_cpup(p++);
5198         return decode_write_verifier(xdr, &res->verf->verifier);
5199 out_overflow:
5200         print_overflow_msg(__func__, xdr);
5201         return -EIO;
5202 }
5203
5204 static int decode_delegreturn(struct xdr_stream *xdr)
5205 {
5206         return decode_op_hdr(xdr, OP_DELEGRETURN);
5207 }
5208
5209 static int decode_secinfo_gss(struct xdr_stream *xdr,
5210                               struct nfs4_secinfo4 *flavor)
5211 {
5212         u32 oid_len;
5213         __be32 *p;
5214
5215         p = xdr_inline_decode(xdr, 4);
5216         if (unlikely(!p))
5217                 goto out_overflow;
5218         oid_len = be32_to_cpup(p);
5219         if (oid_len > GSS_OID_MAX_LEN)
5220                 goto out_err;
5221
5222         p = xdr_inline_decode(xdr, oid_len);
5223         if (unlikely(!p))
5224                 goto out_overflow;
5225         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5226         flavor->flavor_info.oid.len = oid_len;
5227
5228         p = xdr_inline_decode(xdr, 8);
5229         if (unlikely(!p))
5230                 goto out_overflow;
5231         flavor->flavor_info.qop = be32_to_cpup(p++);
5232         flavor->flavor_info.service = be32_to_cpup(p);
5233
5234         return 0;
5235
5236 out_overflow:
5237         print_overflow_msg(__func__, xdr);
5238         return -EIO;
5239 out_err:
5240         return -EINVAL;
5241 }
5242
5243 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5244 {
5245         struct nfs4_secinfo4 *sec_flavor;
5246         unsigned int i, num_flavors;
5247         int status;
5248         __be32 *p;
5249
5250         p = xdr_inline_decode(xdr, 4);
5251         if (unlikely(!p))
5252                 goto out_overflow;
5253
5254         res->flavors->num_flavors = 0;
5255         num_flavors = be32_to_cpup(p);
5256
5257         for (i = 0; i < num_flavors; i++) {
5258                 sec_flavor = &res->flavors->flavors[i];
5259                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5260                         break;
5261
5262                 p = xdr_inline_decode(xdr, 4);
5263                 if (unlikely(!p))
5264                         goto out_overflow;
5265                 sec_flavor->flavor = be32_to_cpup(p);
5266
5267                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5268                         status = decode_secinfo_gss(xdr, sec_flavor);
5269                         if (status)
5270                                 goto out;
5271                 }
5272                 res->flavors->num_flavors++;
5273         }
5274
5275         status = 0;
5276 out:
5277         return status;
5278 out_overflow:
5279         print_overflow_msg(__func__, xdr);
5280         return -EIO;
5281 }
5282
5283 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5284 {
5285         int status = decode_op_hdr(xdr, OP_SECINFO);
5286         if (status)
5287                 return status;
5288         return decode_secinfo_common(xdr, res);
5289 }
5290
5291 #if defined(CONFIG_NFS_V4_1)
5292 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5293 {
5294         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5295         if (status)
5296                 return status;
5297         return decode_secinfo_common(xdr, res);
5298 }
5299
5300 static int decode_exchange_id(struct xdr_stream *xdr,
5301                               struct nfs41_exchange_id_res *res)
5302 {
5303         __be32 *p;
5304         uint32_t dummy;
5305         char *dummy_str;
5306         int status;
5307         uint32_t impl_id_count;
5308
5309         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5310         if (status)
5311                 return status;
5312
5313         p = xdr_inline_decode(xdr, 8);
5314         if (unlikely(!p))
5315                 goto out_overflow;
5316         xdr_decode_hyper(p, &res->clientid);
5317         p = xdr_inline_decode(xdr, 12);
5318         if (unlikely(!p))
5319                 goto out_overflow;
5320         res->seqid = be32_to_cpup(p++);
5321         res->flags = be32_to_cpup(p++);
5322
5323         /* We ask for SP4_NONE */
5324         dummy = be32_to_cpup(p);
5325         if (dummy != SP4_NONE)
5326                 return -EIO;
5327
5328         /* server_owner4.so_minor_id */
5329         p = xdr_inline_decode(xdr, 8);
5330         if (unlikely(!p))
5331                 goto out_overflow;
5332         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5333
5334         /* server_owner4.so_major_id */
5335         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5336         if (unlikely(status))
5337                 return status;
5338         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5339                 return -EIO;
5340         memcpy(res->server_owner->major_id, dummy_str, dummy);
5341         res->server_owner->major_id_sz = dummy;
5342
5343         /* server_scope4 */
5344         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5345         if (unlikely(status))
5346                 return status;
5347         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5348                 return -EIO;
5349         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5350         res->server_scope->server_scope_sz = dummy;
5351
5352         /* Implementation Id */
5353         p = xdr_inline_decode(xdr, 4);
5354         if (unlikely(!p))
5355                 goto out_overflow;
5356         impl_id_count = be32_to_cpup(p++);
5357
5358         if (impl_id_count) {
5359                 /* nii_domain */
5360                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5361                 if (unlikely(status))
5362                         return status;
5363                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5364                         return -EIO;
5365                 memcpy(res->impl_id->domain, dummy_str, dummy);
5366
5367                 /* nii_name */
5368                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5369                 if (unlikely(status))
5370                         return status;
5371                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5372                         return -EIO;
5373                 memcpy(res->impl_id->name, dummy_str, dummy);
5374
5375                 /* nii_date */
5376                 p = xdr_inline_decode(xdr, 12);
5377                 if (unlikely(!p))
5378                         goto out_overflow;
5379                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5380                 res->impl_id->date.nseconds = be32_to_cpup(p);
5381
5382                 /* if there's more than one entry, ignore the rest */
5383         }
5384         return 0;
5385 out_overflow:
5386         print_overflow_msg(__func__, xdr);
5387         return -EIO;
5388 }
5389
5390 static int decode_chan_attrs(struct xdr_stream *xdr,
5391                              struct nfs4_channel_attrs *attrs)
5392 {
5393         __be32 *p;
5394         u32 nr_attrs, val;
5395
5396         p = xdr_inline_decode(xdr, 28);
5397         if (unlikely(!p))
5398                 goto out_overflow;
5399         val = be32_to_cpup(p++);        /* headerpadsz */
5400         if (val)
5401                 return -EINVAL;         /* no support for header padding yet */
5402         attrs->max_rqst_sz = be32_to_cpup(p++);
5403         attrs->max_resp_sz = be32_to_cpup(p++);
5404         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5405         attrs->max_ops = be32_to_cpup(p++);
5406         attrs->max_reqs = be32_to_cpup(p++);
5407         nr_attrs = be32_to_cpup(p);
5408         if (unlikely(nr_attrs > 1)) {
5409                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5410                         "count %u\n", __func__, nr_attrs);
5411                 return -EINVAL;
5412         }
5413         if (nr_attrs == 1) {
5414                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5415                 if (unlikely(!p))
5416                         goto out_overflow;
5417         }
5418         return 0;
5419 out_overflow:
5420         print_overflow_msg(__func__, xdr);
5421         return -EIO;
5422 }
5423
5424 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5425 {
5426         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5427 }
5428
5429 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5430                                 struct nfs41_bind_conn_to_session_res *res)
5431 {
5432         __be32 *p;
5433         int status;
5434
5435         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5436         if (!status)
5437                 status = decode_sessionid(xdr, &res->session->sess_id);
5438         if (unlikely(status))
5439                 return status;
5440
5441         /* dir flags, rdma mode bool */
5442         p = xdr_inline_decode(xdr, 8);
5443         if (unlikely(!p))
5444                 goto out_overflow;
5445
5446         res->dir = be32_to_cpup(p++);
5447         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5448                 return -EIO;
5449         if (be32_to_cpup(p) == 0)
5450                 res->use_conn_in_rdma_mode = false;
5451         else
5452                 res->use_conn_in_rdma_mode = true;
5453
5454         return 0;
5455 out_overflow:
5456         print_overflow_msg(__func__, xdr);
5457         return -EIO;
5458 }
5459
5460 static int decode_create_session(struct xdr_stream *xdr,
5461                                  struct nfs41_create_session_res *res)
5462 {
5463         __be32 *p;
5464         int status;
5465         struct nfs_client *clp = res->client;
5466         struct nfs4_session *session = clp->cl_session;
5467
5468         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5469         if (!status)
5470                 status = decode_sessionid(xdr, &session->sess_id);
5471         if (unlikely(status))
5472                 return status;
5473
5474         /* seqid, flags */
5475         p = xdr_inline_decode(xdr, 8);
5476         if (unlikely(!p))
5477                 goto out_overflow;
5478         clp->cl_seqid = be32_to_cpup(p++);
5479         session->flags = be32_to_cpup(p);
5480
5481         /* Channel attributes */
5482         status = decode_chan_attrs(xdr, &session->fc_attrs);
5483         if (!status)
5484                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5485         return status;
5486 out_overflow:
5487         print_overflow_msg(__func__, xdr);
5488         return -EIO;
5489 }
5490
5491 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5492 {
5493         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5494 }
5495
5496 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5497 {
5498         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5499 }
5500
5501 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5502 {
5503         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5504 }
5505 #endif /* CONFIG_NFS_V4_1 */
5506
5507 static int decode_sequence(struct xdr_stream *xdr,
5508                            struct nfs4_sequence_res *res,
5509                            struct rpc_rqst *rqstp)
5510 {
5511 #if defined(CONFIG_NFS_V4_1)
5512         struct nfs4_session *session;
5513         struct nfs4_sessionid id;
5514         u32 dummy;
5515         int status;
5516         __be32 *p;
5517
5518         if (res->sr_slot == NULL)
5519                 return 0;
5520
5521         status = decode_op_hdr(xdr, OP_SEQUENCE);
5522         if (!status)
5523                 status = decode_sessionid(xdr, &id);
5524         if (unlikely(status))
5525                 goto out_err;
5526
5527         /*
5528          * If the server returns different values for sessionID, slotID or
5529          * sequence number, the server is looney tunes.
5530          */
5531         status = -EREMOTEIO;
5532         session = res->sr_slot->table->session;
5533
5534         if (memcmp(id.data, session->sess_id.data,
5535                    NFS4_MAX_SESSIONID_LEN)) {
5536                 dprintk("%s Invalid session id\n", __func__);
5537                 goto out_err;
5538         }
5539
5540         p = xdr_inline_decode(xdr, 20);
5541         if (unlikely(!p))
5542                 goto out_overflow;
5543
5544         /* seqid */
5545         dummy = be32_to_cpup(p++);
5546         if (dummy != res->sr_slot->seq_nr) {
5547                 dprintk("%s Invalid sequence number\n", __func__);
5548                 goto out_err;
5549         }
5550         /* slot id */
5551         dummy = be32_to_cpup(p++);
5552         if (dummy != res->sr_slot->slot_nr) {
5553                 dprintk("%s Invalid slot id\n", __func__);
5554                 goto out_err;
5555         }
5556         /* highest slot id */
5557         res->sr_highest_slotid = be32_to_cpup(p++);
5558         /* target highest slot id */
5559         res->sr_target_highest_slotid = be32_to_cpup(p++);
5560         /* result flags */
5561         res->sr_status_flags = be32_to_cpup(p);
5562         status = 0;
5563 out_err:
5564         res->sr_status = status;
5565         return status;
5566 out_overflow:
5567         print_overflow_msg(__func__, xdr);
5568         status = -EIO;
5569         goto out_err;
5570 #else  /* CONFIG_NFS_V4_1 */
5571         return 0;
5572 #endif /* CONFIG_NFS_V4_1 */
5573 }
5574
5575 #if defined(CONFIG_NFS_V4_1)
5576 /*
5577  * TODO: Need to handle case when EOF != true;
5578  */
5579 static int decode_getdevicelist(struct xdr_stream *xdr,
5580                                 struct pnfs_devicelist *res)
5581 {
5582         __be32 *p;
5583         int status, i;
5584         nfs4_verifier verftemp;
5585
5586         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5587         if (status)
5588                 return status;
5589
5590         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5591         if (unlikely(!p))
5592                 goto out_overflow;
5593
5594         /* TODO: Skip cookie for now */
5595         p += 2;
5596
5597         /* Read verifier */
5598         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5599
5600         res->num_devs = be32_to_cpup(p);
5601
5602         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5603
5604         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5605                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5606                                 __func__, res->num_devs);
5607                 return -EIO;
5608         }
5609
5610         p = xdr_inline_decode(xdr,
5611                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5612         if (unlikely(!p))
5613                 goto out_overflow;
5614         for (i = 0; i < res->num_devs; i++)
5615                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5616                                             NFS4_DEVICEID4_SIZE);
5617         res->eof = be32_to_cpup(p);
5618         return 0;
5619 out_overflow:
5620         print_overflow_msg(__func__, xdr);
5621         return -EIO;
5622 }
5623
5624 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5625                                 struct pnfs_device *pdev)
5626 {
5627         __be32 *p;
5628         uint32_t len, type;
5629         int status;
5630
5631         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5632         if (status) {
5633                 if (status == -ETOOSMALL) {
5634                         p = xdr_inline_decode(xdr, 4);
5635                         if (unlikely(!p))
5636                                 goto out_overflow;
5637                         pdev->mincount = be32_to_cpup(p);
5638                         dprintk("%s: Min count too small. mincnt = %u\n",
5639                                 __func__, pdev->mincount);
5640                 }
5641                 return status;
5642         }
5643
5644         p = xdr_inline_decode(xdr, 8);
5645         if (unlikely(!p))
5646                 goto out_overflow;
5647         type = be32_to_cpup(p++);
5648         if (type != pdev->layout_type) {
5649                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5650                         __func__, pdev->layout_type, type);
5651                 return -EINVAL;
5652         }
5653         /*
5654          * Get the length of the opaque device_addr4. xdr_read_pages places
5655          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5656          * and places the remaining xdr data in xdr_buf->tail
5657          */
5658         pdev->mincount = be32_to_cpup(p);
5659         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5660                 goto out_overflow;
5661
5662         /* Parse notification bitmap, verifying that it is zero. */
5663         p = xdr_inline_decode(xdr, 4);
5664         if (unlikely(!p))
5665                 goto out_overflow;
5666         len = be32_to_cpup(p);
5667         if (len) {
5668                 uint32_t i;
5669
5670                 p = xdr_inline_decode(xdr, 4 * len);
5671                 if (unlikely(!p))
5672                         goto out_overflow;
5673                 for (i = 0; i < len; i++, p++) {
5674                         if (be32_to_cpup(p)) {
5675                                 dprintk("%s: notifications not supported\n",
5676                                         __func__);
5677                                 return -EIO;
5678                         }
5679                 }
5680         }
5681         return 0;
5682 out_overflow:
5683         print_overflow_msg(__func__, xdr);
5684         return -EIO;
5685 }
5686
5687 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5688                             struct nfs4_layoutget_res *res)
5689 {
5690         __be32 *p;
5691         int status;
5692         u32 layout_count;
5693         u32 recvd;
5694
5695         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5696         if (status)
5697                 return status;
5698         p = xdr_inline_decode(xdr, 4);
5699         if (unlikely(!p))
5700                 goto out_overflow;
5701         res->return_on_close = be32_to_cpup(p);
5702         decode_stateid(xdr, &res->stateid);
5703         p = xdr_inline_decode(xdr, 4);
5704         if (unlikely(!p))
5705                 goto out_overflow;
5706         layout_count = be32_to_cpup(p);
5707         if (!layout_count) {
5708                 dprintk("%s: server responded with empty layout array\n",
5709                         __func__);
5710                 return -EINVAL;
5711         }
5712
5713         p = xdr_inline_decode(xdr, 28);
5714         if (unlikely(!p))
5715                 goto out_overflow;
5716         p = xdr_decode_hyper(p, &res->range.offset);
5717         p = xdr_decode_hyper(p, &res->range.length);
5718         res->range.iomode = be32_to_cpup(p++);
5719         res->type = be32_to_cpup(p++);
5720         res->layoutp->len = be32_to_cpup(p);
5721
5722         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5723                 __func__,
5724                 (unsigned long)res->range.offset,
5725                 (unsigned long)res->range.length,
5726                 res->range.iomode,
5727                 res->type,
5728                 res->layoutp->len);
5729
5730         recvd = xdr_read_pages(xdr, res->layoutp->len);
5731         if (res->layoutp->len > recvd) {
5732                 dprintk("NFS: server cheating in layoutget reply: "
5733                                 "layout len %u > recvd %u\n",
5734                                 res->layoutp->len, recvd);
5735                 return -EINVAL;
5736         }
5737
5738         if (layout_count > 1) {
5739                 /* We only handle a length one array at the moment.  Any
5740                  * further entries are just ignored.  Note that this means
5741                  * the client may see a response that is less than the
5742                  * minimum it requested.
5743                  */
5744                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5745                         __func__, layout_count);
5746         }
5747
5748         return 0;
5749 out_overflow:
5750         print_overflow_msg(__func__, xdr);
5751         return -EIO;
5752 }
5753
5754 static int decode_layoutreturn(struct xdr_stream *xdr,
5755                                struct nfs4_layoutreturn_res *res)
5756 {
5757         __be32 *p;
5758         int status;
5759
5760         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5761         if (status)
5762                 return status;
5763         p = xdr_inline_decode(xdr, 4);
5764         if (unlikely(!p))
5765                 goto out_overflow;
5766         res->lrs_present = be32_to_cpup(p);
5767         if (res->lrs_present)
5768                 status = decode_stateid(xdr, &res->stateid);
5769         return status;
5770 out_overflow:
5771         print_overflow_msg(__func__, xdr);
5772         return -EIO;
5773 }
5774
5775 static int decode_layoutcommit(struct xdr_stream *xdr,
5776                                struct rpc_rqst *req,
5777                                struct nfs4_layoutcommit_res *res)
5778 {
5779         __be32 *p;
5780         __u32 sizechanged;
5781         int status;
5782
5783         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5784         res->status = status;
5785         if (status)
5786                 return status;
5787
5788         p = xdr_inline_decode(xdr, 4);
5789         if (unlikely(!p))
5790                 goto out_overflow;
5791         sizechanged = be32_to_cpup(p);
5792
5793         if (sizechanged) {
5794                 /* throw away new size */
5795                 p = xdr_inline_decode(xdr, 8);
5796                 if (unlikely(!p))
5797                         goto out_overflow;
5798         }
5799         return 0;
5800 out_overflow:
5801         print_overflow_msg(__func__, xdr);
5802         return -EIO;
5803 }
5804
5805 static int decode_test_stateid(struct xdr_stream *xdr,
5806                                struct nfs41_test_stateid_res *res)
5807 {
5808         __be32 *p;
5809         int status;
5810         int num_res;
5811
5812         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5813         if (status)
5814                 return status;
5815
5816         p = xdr_inline_decode(xdr, 4);
5817         if (unlikely(!p))
5818                 goto out_overflow;
5819         num_res = be32_to_cpup(p++);
5820         if (num_res != 1)
5821                 goto out;
5822
5823         p = xdr_inline_decode(xdr, 4);
5824         if (unlikely(!p))
5825                 goto out_overflow;
5826         res->status = be32_to_cpup(p++);
5827
5828         return status;
5829 out_overflow:
5830         print_overflow_msg(__func__, xdr);
5831 out:
5832         return -EIO;
5833 }
5834
5835 static int decode_free_stateid(struct xdr_stream *xdr,
5836                                struct nfs41_free_stateid_res *res)
5837 {
5838         __be32 *p;
5839         int status;
5840
5841         status = decode_op_hdr(xdr, OP_FREE_STATEID);
5842         if (status)
5843                 return status;
5844
5845         p = xdr_inline_decode(xdr, 4);
5846         if (unlikely(!p))
5847                 goto out_overflow;
5848         res->status = be32_to_cpup(p++);
5849         return res->status;
5850 out_overflow:
5851         print_overflow_msg(__func__, xdr);
5852         return -EIO;
5853 }
5854 #endif /* CONFIG_NFS_V4_1 */
5855
5856 /*
5857  * END OF "GENERIC" DECODE ROUTINES.
5858  */
5859
5860 /*
5861  * Decode OPEN_DOWNGRADE response
5862  */
5863 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5864                                        struct xdr_stream *xdr,
5865                                        struct nfs_closeres *res)
5866 {
5867         struct compound_hdr hdr;
5868         int status;
5869
5870         status = decode_compound_hdr(xdr, &hdr);
5871         if (status)
5872                 goto out;
5873         status = decode_sequence(xdr, &res->seq_res, rqstp);
5874         if (status)
5875                 goto out;
5876         status = decode_putfh(xdr);
5877         if (status)
5878                 goto out;
5879         status = decode_open_downgrade(xdr, res);
5880         if (status != 0)
5881                 goto out;
5882         decode_getfattr(xdr, res->fattr, res->server);
5883 out:
5884         return status;
5885 }
5886
5887 /*
5888  * Decode ACCESS response
5889  */
5890 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5891                                struct nfs4_accessres *res)
5892 {
5893         struct compound_hdr hdr;
5894         int status;
5895
5896         status = decode_compound_hdr(xdr, &hdr);
5897         if (status)
5898                 goto out;
5899         status = decode_sequence(xdr, &res->seq_res, rqstp);
5900         if (status)
5901                 goto out;
5902         status = decode_putfh(xdr);
5903         if (status != 0)
5904                 goto out;
5905         status = decode_access(xdr, &res->supported, &res->access);
5906         if (status != 0)
5907                 goto out;
5908         decode_getfattr(xdr, res->fattr, res->server);
5909 out:
5910         return status;
5911 }
5912
5913 /*
5914  * Decode LOOKUP response
5915  */
5916 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5917                                struct nfs4_lookup_res *res)
5918 {
5919         struct compound_hdr hdr;
5920         int status;
5921
5922         status = decode_compound_hdr(xdr, &hdr);
5923         if (status)
5924                 goto out;
5925         status = decode_sequence(xdr, &res->seq_res, rqstp);
5926         if (status)
5927                 goto out;
5928         status = decode_putfh(xdr);
5929         if (status)
5930                 goto out;
5931         status = decode_lookup(xdr);
5932         if (status)
5933                 goto out;
5934         status = decode_getfh(xdr, res->fh);
5935         if (status)
5936                 goto out;
5937         status = decode_getfattr(xdr, res->fattr, res->server);
5938 out:
5939         return status;
5940 }
5941
5942 /*
5943  * Decode LOOKUP_ROOT response
5944  */
5945 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5946                                     struct xdr_stream *xdr,
5947                                     struct nfs4_lookup_res *res)
5948 {
5949         struct compound_hdr hdr;
5950         int status;
5951
5952         status = decode_compound_hdr(xdr, &hdr);
5953         if (status)
5954                 goto out;
5955         status = decode_sequence(xdr, &res->seq_res, rqstp);
5956         if (status)
5957                 goto out;
5958         status = decode_putrootfh(xdr);
5959         if (status)
5960                 goto out;
5961         status = decode_getfh(xdr, res->fh);
5962         if (status == 0)
5963                 status = decode_getfattr(xdr, res->fattr, res->server);
5964 out:
5965         return status;
5966 }
5967
5968 /*
5969  * Decode REMOVE response
5970  */
5971 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5972                                struct nfs_removeres *res)
5973 {
5974         struct compound_hdr hdr;
5975         int status;
5976
5977         status = decode_compound_hdr(xdr, &hdr);
5978         if (status)
5979                 goto out;
5980         status = decode_sequence(xdr, &res->seq_res, rqstp);
5981         if (status)
5982                 goto out;
5983         status = decode_putfh(xdr);
5984         if (status)
5985                 goto out;
5986         status = decode_remove(xdr, &res->cinfo);
5987 out:
5988         return status;
5989 }
5990
5991 /*
5992  * Decode RENAME response
5993  */
5994 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5995                                struct nfs_renameres *res)
5996 {
5997         struct compound_hdr hdr;
5998         int status;
5999
6000         status = decode_compound_hdr(xdr, &hdr);
6001         if (status)
6002                 goto out;
6003         status = decode_sequence(xdr, &res->seq_res, rqstp);
6004         if (status)
6005                 goto out;
6006         status = decode_putfh(xdr);
6007         if (status)
6008                 goto out;
6009         status = decode_savefh(xdr);
6010         if (status)
6011                 goto out;
6012         status = decode_putfh(xdr);
6013         if (status)
6014                 goto out;
6015         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6016 out:
6017         return status;
6018 }
6019
6020 /*
6021  * Decode LINK response
6022  */
6023 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6024                              struct nfs4_link_res *res)
6025 {
6026         struct compound_hdr hdr;
6027         int status;
6028
6029         status = decode_compound_hdr(xdr, &hdr);
6030         if (status)
6031                 goto out;
6032         status = decode_sequence(xdr, &res->seq_res, rqstp);
6033         if (status)
6034                 goto out;
6035         status = decode_putfh(xdr);
6036         if (status)
6037                 goto out;
6038         status = decode_savefh(xdr);
6039         if (status)
6040                 goto out;
6041         status = decode_putfh(xdr);
6042         if (status)
6043                 goto out;
6044         status = decode_link(xdr, &res->cinfo);
6045         if (status)
6046                 goto out;
6047         /*
6048          * Note order: OP_LINK leaves the directory as the current
6049          *             filehandle.
6050          */
6051         status = decode_restorefh(xdr);
6052         if (status)
6053                 goto out;
6054         decode_getfattr(xdr, res->fattr, res->server);
6055 out:
6056         return status;
6057 }
6058
6059 /*
6060  * Decode CREATE response
6061  */
6062 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6063                                struct nfs4_create_res *res)
6064 {
6065         struct compound_hdr hdr;
6066         int status;
6067
6068         status = decode_compound_hdr(xdr, &hdr);
6069         if (status)
6070                 goto out;
6071         status = decode_sequence(xdr, &res->seq_res, rqstp);
6072         if (status)
6073                 goto out;
6074         status = decode_putfh(xdr);
6075         if (status)
6076                 goto out;
6077         status = decode_create(xdr, &res->dir_cinfo);
6078         if (status)
6079                 goto out;
6080         status = decode_getfh(xdr, res->fh);
6081         if (status)
6082                 goto out;
6083         decode_getfattr(xdr, res->fattr, res->server);
6084 out:
6085         return status;
6086 }
6087
6088 /*
6089  * Decode SYMLINK response
6090  */
6091 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6092                                 struct nfs4_create_res *res)
6093 {
6094         return nfs4_xdr_dec_create(rqstp, xdr, res);
6095 }
6096
6097 /*
6098  * Decode GETATTR response
6099  */
6100 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6101                                 struct nfs4_getattr_res *res)
6102 {
6103         struct compound_hdr hdr;
6104         int status;
6105
6106         status = decode_compound_hdr(xdr, &hdr);
6107         if (status)
6108                 goto out;
6109         status = decode_sequence(xdr, &res->seq_res, rqstp);
6110         if (status)
6111                 goto out;
6112         status = decode_putfh(xdr);
6113         if (status)
6114                 goto out;
6115         status = decode_getfattr(xdr, res->fattr, res->server);
6116 out:
6117         return status;
6118 }
6119
6120 /*
6121  * Encode an SETACL request
6122  */
6123 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6124                                 struct nfs_setaclargs *args)
6125 {
6126         struct compound_hdr hdr = {
6127                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6128         };
6129
6130         encode_compound_hdr(xdr, req, &hdr);
6131         encode_sequence(xdr, &args->seq_args, &hdr);
6132         encode_putfh(xdr, args->fh, &hdr);
6133         encode_setacl(xdr, args, &hdr);
6134         encode_nops(&hdr);
6135 }
6136
6137 /*
6138  * Decode SETACL response
6139  */
6140 static int
6141 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6142                     struct nfs_setaclres *res)
6143 {
6144         struct compound_hdr hdr;
6145         int status;
6146
6147         status = decode_compound_hdr(xdr, &hdr);
6148         if (status)
6149                 goto out;
6150         status = decode_sequence(xdr, &res->seq_res, rqstp);
6151         if (status)
6152                 goto out;
6153         status = decode_putfh(xdr);
6154         if (status)
6155                 goto out;
6156         status = decode_setattr(xdr);
6157 out:
6158         return status;
6159 }
6160
6161 /*
6162  * Decode GETACL response
6163  */
6164 static int
6165 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6166                     struct nfs_getaclres *res)
6167 {
6168         struct compound_hdr hdr;
6169         int status;
6170
6171         if (res->acl_scratch != NULL) {
6172                 void *p = page_address(res->acl_scratch);
6173                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6174         }
6175         status = decode_compound_hdr(xdr, &hdr);
6176         if (status)
6177                 goto out;
6178         status = decode_sequence(xdr, &res->seq_res, rqstp);
6179         if (status)
6180                 goto out;
6181         status = decode_putfh(xdr);
6182         if (status)
6183                 goto out;
6184         status = decode_getacl(xdr, rqstp, res);
6185
6186 out:
6187         return status;
6188 }
6189
6190 /*
6191  * Decode CLOSE response
6192  */
6193 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6194                               struct nfs_closeres *res)
6195 {
6196         struct compound_hdr hdr;
6197         int status;
6198
6199         status = decode_compound_hdr(xdr, &hdr);
6200         if (status)
6201                 goto out;
6202         status = decode_sequence(xdr, &res->seq_res, rqstp);
6203         if (status)
6204                 goto out;
6205         status = decode_putfh(xdr);
6206         if (status)
6207                 goto out;
6208         status = decode_close(xdr, res);
6209         if (status != 0)
6210                 goto out;
6211         /*
6212          * Note: Server may do delete on close for this file
6213          *      in which case the getattr call will fail with
6214          *      an ESTALE error. Shouldn't be a problem,
6215          *      though, since fattr->valid will remain unset.
6216          */
6217         decode_getfattr(xdr, res->fattr, res->server);
6218 out:
6219         return status;
6220 }
6221
6222 /*
6223  * Decode OPEN response
6224  */
6225 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6226                              struct nfs_openres *res)
6227 {
6228         struct compound_hdr hdr;
6229         int status;
6230
6231         status = decode_compound_hdr(xdr, &hdr);
6232         if (status)
6233                 goto out;
6234         status = decode_sequence(xdr, &res->seq_res, rqstp);
6235         if (status)
6236                 goto out;
6237         status = decode_putfh(xdr);
6238         if (status)
6239                 goto out;
6240         status = decode_open(xdr, res);
6241         if (status)
6242                 goto out;
6243         status = decode_getfh(xdr, &res->fh);
6244         if (status)
6245                 goto out;
6246         if (res->access_request)
6247                 decode_access(xdr, &res->access_supported, &res->access_result);
6248         decode_getfattr(xdr, res->f_attr, res->server);
6249 out:
6250         return status;
6251 }
6252
6253 /*
6254  * Decode OPEN_CONFIRM response
6255  */
6256 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6257                                      struct xdr_stream *xdr,
6258                                      struct nfs_open_confirmres *res)
6259 {
6260         struct compound_hdr hdr;
6261         int status;
6262
6263         status = decode_compound_hdr(xdr, &hdr);
6264         if (status)
6265                 goto out;
6266         status = decode_putfh(xdr);
6267         if (status)
6268                 goto out;
6269         status = decode_open_confirm(xdr, res);
6270 out:
6271         return status;
6272 }
6273
6274 /*
6275  * Decode OPEN response
6276  */
6277 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6278                                     struct xdr_stream *xdr,
6279                                     struct nfs_openres *res)
6280 {
6281         struct compound_hdr hdr;
6282         int status;
6283
6284         status = decode_compound_hdr(xdr, &hdr);
6285         if (status)
6286                 goto out;
6287         status = decode_sequence(xdr, &res->seq_res, rqstp);
6288         if (status)
6289                 goto out;
6290         status = decode_putfh(xdr);
6291         if (status)
6292                 goto out;
6293         status = decode_open(xdr, res);
6294         if (status)
6295                 goto out;
6296         if (res->access_request)
6297                 decode_access(xdr, &res->access_supported, &res->access_result);
6298         decode_getfattr(xdr, res->f_attr, res->server);
6299 out:
6300         return status;
6301 }
6302
6303 /*
6304  * Decode SETATTR response
6305  */
6306 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6307                                 struct xdr_stream *xdr,
6308                                 struct nfs_setattrres *res)
6309 {
6310         struct compound_hdr hdr;
6311         int status;
6312
6313         status = decode_compound_hdr(xdr, &hdr);
6314         if (status)
6315                 goto out;
6316         status = decode_sequence(xdr, &res->seq_res, rqstp);
6317         if (status)
6318                 goto out;
6319         status = decode_putfh(xdr);
6320         if (status)
6321                 goto out;
6322         status = decode_setattr(xdr);
6323         if (status)
6324                 goto out;
6325         decode_getfattr(xdr, res->fattr, res->server);
6326 out:
6327         return status;
6328 }
6329
6330 /*
6331  * Decode LOCK response
6332  */
6333 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6334                              struct nfs_lock_res *res)
6335 {
6336         struct compound_hdr hdr;
6337         int status;
6338
6339         status = decode_compound_hdr(xdr, &hdr);
6340         if (status)
6341                 goto out;
6342         status = decode_sequence(xdr, &res->seq_res, rqstp);
6343         if (status)
6344                 goto out;
6345         status = decode_putfh(xdr);
6346         if (status)
6347                 goto out;
6348         status = decode_lock(xdr, res);
6349 out:
6350         return status;
6351 }
6352
6353 /*
6354  * Decode LOCKT response
6355  */
6356 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6357                               struct nfs_lockt_res *res)
6358 {
6359         struct compound_hdr hdr;
6360         int status;
6361
6362         status = decode_compound_hdr(xdr, &hdr);
6363         if (status)
6364                 goto out;
6365         status = decode_sequence(xdr, &res->seq_res, rqstp);
6366         if (status)
6367                 goto out;
6368         status = decode_putfh(xdr);
6369         if (status)
6370                 goto out;
6371         status = decode_lockt(xdr, res);
6372 out:
6373         return status;
6374 }
6375
6376 /*
6377  * Decode LOCKU response
6378  */
6379 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6380                               struct nfs_locku_res *res)
6381 {
6382         struct compound_hdr hdr;
6383         int status;
6384
6385         status = decode_compound_hdr(xdr, &hdr);
6386         if (status)
6387                 goto out;
6388         status = decode_sequence(xdr, &res->seq_res, rqstp);
6389         if (status)
6390                 goto out;
6391         status = decode_putfh(xdr);
6392         if (status)
6393                 goto out;
6394         status = decode_locku(xdr, res);
6395 out:
6396         return status;
6397 }
6398
6399 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6400                                           struct xdr_stream *xdr, void *dummy)
6401 {
6402         struct compound_hdr hdr;
6403         int status;
6404
6405         status = decode_compound_hdr(xdr, &hdr);
6406         if (!status)
6407                 status = decode_release_lockowner(xdr);
6408         return status;
6409 }
6410
6411 /*
6412  * Decode READLINK response
6413  */
6414 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6415                                  struct xdr_stream *xdr,
6416                                  struct nfs4_readlink_res *res)
6417 {
6418         struct compound_hdr hdr;
6419         int status;
6420
6421         status = decode_compound_hdr(xdr, &hdr);
6422         if (status)
6423                 goto out;
6424         status = decode_sequence(xdr, &res->seq_res, rqstp);
6425         if (status)
6426                 goto out;
6427         status = decode_putfh(xdr);
6428         if (status)
6429                 goto out;
6430         status = decode_readlink(xdr, rqstp);
6431 out:
6432         return status;
6433 }
6434
6435 /*
6436  * Decode READDIR response
6437  */
6438 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6439                                 struct nfs4_readdir_res *res)
6440 {
6441         struct compound_hdr hdr;
6442         int status;
6443
6444         status = decode_compound_hdr(xdr, &hdr);
6445         if (status)
6446                 goto out;
6447         status = decode_sequence(xdr, &res->seq_res, rqstp);
6448         if (status)
6449                 goto out;
6450         status = decode_putfh(xdr);
6451         if (status)
6452                 goto out;
6453         status = decode_readdir(xdr, rqstp, res);
6454 out:
6455         return status;
6456 }
6457
6458 /*
6459  * Decode Read response
6460  */
6461 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6462                              struct nfs_readres *res)
6463 {
6464         struct compound_hdr hdr;
6465         int status;
6466
6467         status = decode_compound_hdr(xdr, &hdr);
6468         if (status)
6469                 goto out;
6470         status = decode_sequence(xdr, &res->seq_res, rqstp);
6471         if (status)
6472                 goto out;
6473         status = decode_putfh(xdr);
6474         if (status)
6475                 goto out;
6476         status = decode_read(xdr, rqstp, res);
6477         if (!status)
6478                 status = res->count;
6479 out:
6480         return status;
6481 }
6482
6483 /*
6484  * Decode WRITE response
6485  */
6486 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6487                               struct nfs_writeres *res)
6488 {
6489         struct compound_hdr hdr;
6490         int status;
6491
6492         status = decode_compound_hdr(xdr, &hdr);
6493         if (status)
6494                 goto out;
6495         status = decode_sequence(xdr, &res->seq_res, rqstp);
6496         if (status)
6497                 goto out;
6498         status = decode_putfh(xdr);
6499         if (status)
6500                 goto out;
6501         status = decode_write(xdr, res);
6502         if (status)
6503                 goto out;
6504         if (res->fattr)
6505                 decode_getfattr(xdr, res->fattr, res->server);
6506         if (!status)
6507                 status = res->count;
6508 out:
6509         return status;
6510 }
6511
6512 /*
6513  * Decode COMMIT response
6514  */
6515 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6516                                struct nfs_commitres *res)
6517 {
6518         struct compound_hdr hdr;
6519         int status;
6520
6521         status = decode_compound_hdr(xdr, &hdr);
6522         if (status)
6523                 goto out;
6524         status = decode_sequence(xdr, &res->seq_res, rqstp);
6525         if (status)
6526                 goto out;
6527         status = decode_putfh(xdr);
6528         if (status)
6529                 goto out;
6530         status = decode_commit(xdr, res);
6531 out:
6532         return status;
6533 }
6534
6535 /*
6536  * Decode FSINFO response
6537  */
6538 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6539                                struct nfs4_fsinfo_res *res)
6540 {
6541         struct compound_hdr hdr;
6542         int status;
6543
6544         status = decode_compound_hdr(xdr, &hdr);
6545         if (!status)
6546                 status = decode_sequence(xdr, &res->seq_res, req);
6547         if (!status)
6548                 status = decode_putfh(xdr);
6549         if (!status)
6550                 status = decode_fsinfo(xdr, res->fsinfo);
6551         return status;
6552 }
6553
6554 /*
6555  * Decode PATHCONF response
6556  */
6557 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6558                                  struct nfs4_pathconf_res *res)
6559 {
6560         struct compound_hdr hdr;
6561         int status;
6562
6563         status = decode_compound_hdr(xdr, &hdr);
6564         if (!status)
6565                 status = decode_sequence(xdr, &res->seq_res, req);
6566         if (!status)
6567                 status = decode_putfh(xdr);
6568         if (!status)
6569                 status = decode_pathconf(xdr, res->pathconf);
6570         return status;
6571 }
6572
6573 /*
6574  * Decode STATFS response
6575  */
6576 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6577                                struct nfs4_statfs_res *res)
6578 {
6579         struct compound_hdr hdr;
6580         int status;
6581
6582         status = decode_compound_hdr(xdr, &hdr);
6583         if (!status)
6584                 status = decode_sequence(xdr, &res->seq_res, req);
6585         if (!status)
6586                 status = decode_putfh(xdr);
6587         if (!status)
6588                 status = decode_statfs(xdr, res->fsstat);
6589         return status;
6590 }
6591
6592 /*
6593  * Decode GETATTR_BITMAP response
6594  */
6595 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6596                                     struct xdr_stream *xdr,
6597                                     struct nfs4_server_caps_res *res)
6598 {
6599         struct compound_hdr hdr;
6600         int status;
6601
6602         status = decode_compound_hdr(xdr, &hdr);
6603         if (status)
6604                 goto out;
6605         status = decode_sequence(xdr, &res->seq_res, req);
6606         if (status)
6607                 goto out;
6608         status = decode_putfh(xdr);
6609         if (status)
6610                 goto out;
6611         status = decode_server_caps(xdr, res);
6612 out:
6613         return status;
6614 }
6615
6616 /*
6617  * Decode RENEW response
6618  */
6619 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6620                               void *__unused)
6621 {
6622         struct compound_hdr hdr;
6623         int status;
6624
6625         status = decode_compound_hdr(xdr, &hdr);
6626         if (!status)
6627                 status = decode_renew(xdr);
6628         return status;
6629 }
6630
6631 /*
6632  * Decode SETCLIENTID response
6633  */
6634 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6635                                     struct xdr_stream *xdr,
6636                                     struct nfs4_setclientid_res *res)
6637 {
6638         struct compound_hdr hdr;
6639         int status;
6640
6641         status = decode_compound_hdr(xdr, &hdr);
6642         if (!status)
6643                 status = decode_setclientid(xdr, res);
6644         return status;
6645 }
6646
6647 /*
6648  * Decode SETCLIENTID_CONFIRM response
6649  */
6650 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6651                                             struct xdr_stream *xdr)
6652 {
6653         struct compound_hdr hdr;
6654         int status;
6655
6656         status = decode_compound_hdr(xdr, &hdr);
6657         if (!status)
6658                 status = decode_setclientid_confirm(xdr);
6659         return status;
6660 }
6661
6662 /*
6663  * Decode DELEGRETURN response
6664  */
6665 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6666                                     struct xdr_stream *xdr,
6667                                     struct nfs4_delegreturnres *res)
6668 {
6669         struct compound_hdr hdr;
6670         int status;
6671
6672         status = decode_compound_hdr(xdr, &hdr);
6673         if (status)
6674                 goto out;
6675         status = decode_sequence(xdr, &res->seq_res, rqstp);
6676         if (status)
6677                 goto out;
6678         status = decode_putfh(xdr);
6679         if (status != 0)
6680                 goto out;
6681         status = decode_getfattr(xdr, res->fattr, res->server);
6682         if (status != 0)
6683                 goto out;
6684         status = decode_delegreturn(xdr);
6685 out:
6686         return status;
6687 }
6688
6689 /*
6690  * Decode FS_LOCATIONS response
6691  */
6692 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6693                                      struct xdr_stream *xdr,
6694                                      struct nfs4_fs_locations_res *res)
6695 {
6696         struct compound_hdr hdr;
6697         int status;
6698
6699         status = decode_compound_hdr(xdr, &hdr);
6700         if (status)
6701                 goto out;
6702         status = decode_sequence(xdr, &res->seq_res, req);
6703         if (status)
6704                 goto out;
6705         status = decode_putfh(xdr);
6706         if (status)
6707                 goto out;
6708         status = decode_lookup(xdr);
6709         if (status)
6710                 goto out;
6711         xdr_enter_page(xdr, PAGE_SIZE);
6712         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6713                                          NULL, res->fs_locations,
6714                                          res->fs_locations->server);
6715 out:
6716         return status;
6717 }
6718
6719 /*
6720  * Decode SECINFO response
6721  */
6722 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6723                                 struct xdr_stream *xdr,
6724                                 struct nfs4_secinfo_res *res)
6725 {
6726         struct compound_hdr hdr;
6727         int status;
6728
6729         status = decode_compound_hdr(xdr, &hdr);
6730         if (status)
6731                 goto out;
6732         status = decode_sequence(xdr, &res->seq_res, rqstp);
6733         if (status)
6734                 goto out;
6735         status = decode_putfh(xdr);
6736         if (status)
6737                 goto out;
6738         status = decode_secinfo(xdr, res);
6739 out:
6740         return status;
6741 }
6742
6743 #if defined(CONFIG_NFS_V4_1)
6744 /*
6745  * Decode BIND_CONN_TO_SESSION response
6746  */
6747 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6748                                         struct xdr_stream *xdr,
6749                                         void *res)
6750 {
6751         struct compound_hdr hdr;
6752         int status;
6753
6754         status = decode_compound_hdr(xdr, &hdr);
6755         if (!status)
6756                 status = decode_bind_conn_to_session(xdr, res);
6757         return status;
6758 }
6759
6760 /*
6761  * Decode EXCHANGE_ID response
6762  */
6763 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6764                                     struct xdr_stream *xdr,
6765                                     void *res)
6766 {
6767         struct compound_hdr hdr;
6768         int status;
6769
6770         status = decode_compound_hdr(xdr, &hdr);
6771         if (!status)
6772                 status = decode_exchange_id(xdr, res);
6773         return status;
6774 }
6775
6776 /*
6777  * Decode CREATE_SESSION response
6778  */
6779 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6780                                        struct xdr_stream *xdr,
6781                                        struct nfs41_create_session_res *res)
6782 {
6783         struct compound_hdr hdr;
6784         int status;
6785
6786         status = decode_compound_hdr(xdr, &hdr);
6787         if (!status)
6788                 status = decode_create_session(xdr, res);
6789         return status;
6790 }
6791
6792 /*
6793  * Decode DESTROY_SESSION response
6794  */
6795 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6796                                         struct xdr_stream *xdr,
6797                                         void *res)
6798 {
6799         struct compound_hdr hdr;
6800         int status;
6801
6802         status = decode_compound_hdr(xdr, &hdr);
6803         if (!status)
6804                 status = decode_destroy_session(xdr, res);
6805         return status;
6806 }
6807
6808 /*
6809  * Decode DESTROY_CLIENTID response
6810  */
6811 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6812                                         struct xdr_stream *xdr,
6813                                         void *res)
6814 {
6815         struct compound_hdr hdr;
6816         int status;
6817
6818         status = decode_compound_hdr(xdr, &hdr);
6819         if (!status)
6820                 status = decode_destroy_clientid(xdr, res);
6821         return status;
6822 }
6823
6824 /*
6825  * Decode SEQUENCE response
6826  */
6827 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6828                                  struct xdr_stream *xdr,
6829                                  struct nfs4_sequence_res *res)
6830 {
6831         struct compound_hdr hdr;
6832         int status;
6833
6834         status = decode_compound_hdr(xdr, &hdr);
6835         if (!status)
6836                 status = decode_sequence(xdr, res, rqstp);
6837         return status;
6838 }
6839
6840 /*
6841  * Decode GET_LEASE_TIME response
6842  */
6843 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6844                                        struct xdr_stream *xdr,
6845                                        struct nfs4_get_lease_time_res *res)
6846 {
6847         struct compound_hdr hdr;
6848         int status;
6849
6850         status = decode_compound_hdr(xdr, &hdr);
6851         if (!status)
6852                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6853         if (!status)
6854                 status = decode_putrootfh(xdr);
6855         if (!status)
6856                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6857         return status;
6858 }
6859
6860 /*
6861  * Decode RECLAIM_COMPLETE response
6862  */
6863 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6864                                          struct xdr_stream *xdr,
6865                                          struct nfs41_reclaim_complete_res *res)
6866 {
6867         struct compound_hdr hdr;
6868         int status;
6869
6870         status = decode_compound_hdr(xdr, &hdr);
6871         if (!status)
6872                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6873         if (!status)
6874                 status = decode_reclaim_complete(xdr, (void *)NULL);
6875         return status;
6876 }
6877
6878 /*
6879  * Decode GETDEVICELIST response
6880  */
6881 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6882                                       struct xdr_stream *xdr,
6883                                       struct nfs4_getdevicelist_res *res)
6884 {
6885         struct compound_hdr hdr;
6886         int status;
6887
6888         dprintk("encoding getdevicelist!\n");
6889
6890         status = decode_compound_hdr(xdr, &hdr);
6891         if (status != 0)
6892                 goto out;
6893         status = decode_sequence(xdr, &res->seq_res, rqstp);
6894         if (status != 0)
6895                 goto out;
6896         status = decode_putfh(xdr);
6897         if (status != 0)
6898                 goto out;
6899         status = decode_getdevicelist(xdr, res->devlist);
6900 out:
6901         return status;
6902 }
6903
6904 /*
6905  * Decode GETDEVINFO response
6906  */
6907 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6908                                       struct xdr_stream *xdr,
6909                                       struct nfs4_getdeviceinfo_res *res)
6910 {
6911         struct compound_hdr hdr;
6912         int status;
6913
6914         status = decode_compound_hdr(xdr, &hdr);
6915         if (status != 0)
6916                 goto out;
6917         status = decode_sequence(xdr, &res->seq_res, rqstp);
6918         if (status != 0)
6919                 goto out;
6920         status = decode_getdeviceinfo(xdr, res->pdev);
6921 out:
6922         return status;
6923 }
6924
6925 /*
6926  * Decode LAYOUTGET response
6927  */
6928 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6929                                   struct xdr_stream *xdr,
6930                                   struct nfs4_layoutget_res *res)
6931 {
6932         struct compound_hdr hdr;
6933         int status;
6934
6935         status = decode_compound_hdr(xdr, &hdr);
6936         if (status)
6937                 goto out;
6938         status = decode_sequence(xdr, &res->seq_res, rqstp);
6939         if (status)
6940                 goto out;
6941         status = decode_putfh(xdr);
6942         if (status)
6943                 goto out;
6944         status = decode_layoutget(xdr, rqstp, res);
6945 out:
6946         return status;
6947 }
6948
6949 /*
6950  * Decode LAYOUTRETURN response
6951  */
6952 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6953                                      struct xdr_stream *xdr,
6954                                      struct nfs4_layoutreturn_res *res)
6955 {
6956         struct compound_hdr hdr;
6957         int status;
6958
6959         status = decode_compound_hdr(xdr, &hdr);
6960         if (status)
6961                 goto out;
6962         status = decode_sequence(xdr, &res->seq_res, rqstp);
6963         if (status)
6964                 goto out;
6965         status = decode_putfh(xdr);
6966         if (status)
6967                 goto out;
6968         status = decode_layoutreturn(xdr, res);
6969 out:
6970         return status;
6971 }
6972
6973 /*
6974  * Decode LAYOUTCOMMIT response
6975  */
6976 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6977                                      struct xdr_stream *xdr,
6978                                      struct nfs4_layoutcommit_res *res)
6979 {
6980         struct compound_hdr hdr;
6981         int status;
6982
6983         status = decode_compound_hdr(xdr, &hdr);
6984         if (status)
6985                 goto out;
6986         status = decode_sequence(xdr, &res->seq_res, rqstp);
6987         if (status)
6988                 goto out;
6989         status = decode_putfh(xdr);
6990         if (status)
6991                 goto out;
6992         status = decode_layoutcommit(xdr, rqstp, res);
6993         if (status)
6994                 goto out;
6995         decode_getfattr(xdr, res->fattr, res->server);
6996 out:
6997         return status;
6998 }
6999
7000 /*
7001  * Decode SECINFO_NO_NAME response
7002  */
7003 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7004                                         struct xdr_stream *xdr,
7005                                         struct nfs4_secinfo_res *res)
7006 {
7007         struct compound_hdr hdr;
7008         int status;
7009
7010         status = decode_compound_hdr(xdr, &hdr);
7011         if (status)
7012                 goto out;
7013         status = decode_sequence(xdr, &res->seq_res, rqstp);
7014         if (status)
7015                 goto out;
7016         status = decode_putrootfh(xdr);
7017         if (status)
7018                 goto out;
7019         status = decode_secinfo_no_name(xdr, res);
7020 out:
7021         return status;
7022 }
7023
7024 /*
7025  * Decode TEST_STATEID response
7026  */
7027 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7028                                      struct xdr_stream *xdr,
7029                                      struct nfs41_test_stateid_res *res)
7030 {
7031         struct compound_hdr hdr;
7032         int status;
7033
7034         status = decode_compound_hdr(xdr, &hdr);
7035         if (status)
7036                 goto out;
7037         status = decode_sequence(xdr, &res->seq_res, rqstp);
7038         if (status)
7039                 goto out;
7040         status = decode_test_stateid(xdr, res);
7041 out:
7042         return status;
7043 }
7044
7045 /*
7046  * Decode FREE_STATEID response
7047  */
7048 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7049                                      struct xdr_stream *xdr,
7050                                      struct nfs41_free_stateid_res *res)
7051 {
7052         struct compound_hdr hdr;
7053         int status;
7054
7055         status = decode_compound_hdr(xdr, &hdr);
7056         if (status)
7057                 goto out;
7058         status = decode_sequence(xdr, &res->seq_res, rqstp);
7059         if (status)
7060                 goto out;
7061         status = decode_free_stateid(xdr, res);
7062 out:
7063         return status;
7064 }
7065 #endif /* CONFIG_NFS_V4_1 */
7066
7067 /**
7068  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7069  *                      the local page cache.
7070  * @xdr: XDR stream where entry resides
7071  * @entry: buffer to fill in with entry data
7072  * @plus: boolean indicating whether this should be a readdirplus entry
7073  *
7074  * Returns zero if successful, otherwise a negative errno value is
7075  * returned.
7076  *
7077  * This function is not invoked during READDIR reply decoding, but
7078  * rather whenever an application invokes the getdents(2) system call
7079  * on a directory already in our cache.
7080  */
7081 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7082                        int plus)
7083 {
7084         unsigned int savep;
7085         uint32_t bitmap[3] = {0};
7086         uint32_t len;
7087         __be32 *p = xdr_inline_decode(xdr, 4);
7088         if (unlikely(!p))
7089                 goto out_overflow;
7090         if (*p == xdr_zero) {
7091                 p = xdr_inline_decode(xdr, 4);
7092                 if (unlikely(!p))
7093                         goto out_overflow;
7094                 if (*p == xdr_zero)
7095                         return -EAGAIN;
7096                 entry->eof = 1;
7097                 return -EBADCOOKIE;
7098         }
7099
7100         p = xdr_inline_decode(xdr, 12);
7101         if (unlikely(!p))
7102                 goto out_overflow;
7103         entry->prev_cookie = entry->cookie;
7104         p = xdr_decode_hyper(p, &entry->cookie);
7105         entry->len = be32_to_cpup(p);
7106
7107         p = xdr_inline_decode(xdr, entry->len);
7108         if (unlikely(!p))
7109                 goto out_overflow;
7110         entry->name = (const char *) p;
7111
7112         /*
7113          * In case the server doesn't return an inode number,
7114          * we fake one here.  (We don't use inode number 0,
7115          * since glibc seems to choke on it...)
7116          */
7117         entry->ino = 1;
7118         entry->fattr->valid = 0;
7119
7120         if (decode_attr_bitmap(xdr, bitmap) < 0)
7121                 goto out_overflow;
7122
7123         if (decode_attr_length(xdr, &len, &savep) < 0)
7124                 goto out_overflow;
7125
7126         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7127                                   NULL, entry->server) < 0)
7128                 goto out_overflow;
7129         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7130                 entry->ino = entry->fattr->mounted_on_fileid;
7131         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7132                 entry->ino = entry->fattr->fileid;
7133
7134         entry->d_type = DT_UNKNOWN;
7135         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7136                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7137
7138         return 0;
7139
7140 out_overflow:
7141         print_overflow_msg(__func__, xdr);
7142         return -EAGAIN;
7143 }
7144
7145 /*
7146  * We need to translate between nfs status return values and
7147  * the local errno values which may not be the same.
7148  */
7149 static struct {
7150         int stat;
7151         int errno;
7152 } nfs_errtbl[] = {
7153         { NFS4_OK,              0               },
7154         { NFS4ERR_PERM,         -EPERM          },
7155         { NFS4ERR_NOENT,        -ENOENT         },
7156         { NFS4ERR_IO,           -errno_NFSERR_IO},
7157         { NFS4ERR_NXIO,         -ENXIO          },
7158         { NFS4ERR_ACCESS,       -EACCES         },
7159         { NFS4ERR_EXIST,        -EEXIST         },
7160         { NFS4ERR_XDEV,         -EXDEV          },
7161         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7162         { NFS4ERR_ISDIR,        -EISDIR         },
7163         { NFS4ERR_INVAL,        -EINVAL         },
7164         { NFS4ERR_FBIG,         -EFBIG          },
7165         { NFS4ERR_NOSPC,        -ENOSPC         },
7166         { NFS4ERR_ROFS,         -EROFS          },
7167         { NFS4ERR_MLINK,        -EMLINK         },
7168         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7169         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7170         { NFS4ERR_DQUOT,        -EDQUOT         },
7171         { NFS4ERR_STALE,        -ESTALE         },
7172         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7173         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7174         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7175         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7176         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7177         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7178         { NFS4ERR_LOCKED,       -EAGAIN         },
7179         { NFS4ERR_SYMLINK,      -ELOOP          },
7180         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7181         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7182         { -1,                   -EIO            }
7183 };
7184
7185 /*
7186  * Convert an NFS error code to a local one.
7187  * This one is used jointly by NFSv2 and NFSv3.
7188  */
7189 static int
7190 nfs4_stat_to_errno(int stat)
7191 {
7192         int i;
7193         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7194                 if (nfs_errtbl[i].stat == stat)
7195                         return nfs_errtbl[i].errno;
7196         }
7197         if (stat <= 10000 || stat > 10100) {
7198                 /* The server is looney tunes. */
7199                 return -EREMOTEIO;
7200         }
7201         /* If we cannot translate the error, the recovery routines should
7202          * handle it.
7203          * Note: remaining NFSv4 error codes have values > 10000, so should
7204          * not conflict with native Linux error codes.
7205          */
7206         return -stat;
7207 }
7208
7209 #define PROC(proc, argtype, restype)                            \
7210 [NFSPROC4_CLNT_##proc] = {                                      \
7211         .p_proc   = NFSPROC4_COMPOUND,                          \
7212         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7213         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7214         .p_arglen = NFS4_##argtype##_sz,                        \
7215         .p_replen = NFS4_##restype##_sz,                        \
7216         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7217         .p_name   = #proc,                                      \
7218 }
7219
7220 struct rpc_procinfo     nfs4_procedures[] = {
7221         PROC(READ,              enc_read,               dec_read),
7222         PROC(WRITE,             enc_write,              dec_write),
7223         PROC(COMMIT,            enc_commit,             dec_commit),
7224         PROC(OPEN,              enc_open,               dec_open),
7225         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7226         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7227         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7228         PROC(CLOSE,             enc_close,              dec_close),
7229         PROC(SETATTR,           enc_setattr,            dec_setattr),
7230         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7231         PROC(RENEW,             enc_renew,              dec_renew),
7232         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7233         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7234         PROC(LOCK,              enc_lock,               dec_lock),
7235         PROC(LOCKT,             enc_lockt,              dec_lockt),
7236         PROC(LOCKU,             enc_locku,              dec_locku),
7237         PROC(ACCESS,            enc_access,             dec_access),
7238         PROC(GETATTR,           enc_getattr,            dec_getattr),
7239         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7240         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7241         PROC(REMOVE,            enc_remove,             dec_remove),
7242         PROC(RENAME,            enc_rename,             dec_rename),
7243         PROC(LINK,              enc_link,               dec_link),
7244         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7245         PROC(CREATE,            enc_create,             dec_create),
7246         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7247         PROC(STATFS,            enc_statfs,             dec_statfs),
7248         PROC(READLINK,          enc_readlink,           dec_readlink),
7249         PROC(READDIR,           enc_readdir,            dec_readdir),
7250         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7251         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7252         PROC(GETACL,            enc_getacl,             dec_getacl),
7253         PROC(SETACL,            enc_setacl,             dec_setacl),
7254         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7255         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7256         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7257 #if defined(CONFIG_NFS_V4_1)
7258         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7259         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7260         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7261         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7262         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7263         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7264         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7265         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7266         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7267         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7268         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7269         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7270         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7271         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7272         PROC(BIND_CONN_TO_SESSION,
7273                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7274         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7275 #endif /* CONFIG_NFS_V4_1 */
7276 };
7277
7278 const struct rpc_version nfs_version4 = {
7279         .number                 = 4,
7280         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7281         .procs                  = nfs4_procedures
7282 };
7283
7284 /*
7285  * Local variables:
7286  *  c-basic-offset: 8
7287  * End:
7288  */