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                                 encode_putrootfh_maxsz + \
 535                                 encode_fsinfo_maxsz)
 536 #define NFS4_dec_setclientid_confirm_sz \
 537                                 (compound_decode_hdr_maxsz + \
 538                                 decode_setclientid_confirm_maxsz + \
 539                                 decode_putrootfh_maxsz + \
 540                                 decode_fsinfo_maxsz)
 541 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 542                                 encode_sequence_maxsz + \
 543                                 encode_putfh_maxsz + \
 544                                 encode_lock_maxsz)
 545 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 546                                 decode_sequence_maxsz + \
 547                                 decode_putfh_maxsz + \
 548                                 decode_lock_maxsz)
 549 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 550                                 encode_sequence_maxsz + \
 551                                 encode_putfh_maxsz + \
 552                                 encode_lockt_maxsz)
 553 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 554                                  decode_sequence_maxsz + \
 555                                  decode_putfh_maxsz + \
 556                                  decode_lockt_maxsz)
 557 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_locku_maxsz)
 561 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_locku_maxsz)
 565 #define NFS4_enc_release_lockowner_sz \
 566                                 (compound_encode_hdr_maxsz + \
 567                                  encode_lockowner_maxsz)
 568 #define NFS4_dec_release_lockowner_sz \
 569                                 (compound_decode_hdr_maxsz + \
 570                                  decode_lockowner_maxsz)
 571 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 572                                 encode_sequence_maxsz + \
 573                                 encode_putfh_maxsz + \
 574                                 encode_access_maxsz + \
 575                                 encode_getattr_maxsz)
 576 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 577                                 decode_sequence_maxsz + \
 578                                 decode_putfh_maxsz + \
 579                                 decode_access_maxsz + \
 580                                 decode_getattr_maxsz)
 581 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 582                                 encode_sequence_maxsz + \
 583                                 encode_putfh_maxsz + \
 584                                 encode_getattr_maxsz)
 585 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 586                                 decode_sequence_maxsz + \
 587                                 decode_putfh_maxsz + \
 588                                 decode_getattr_maxsz)
 589 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 590                                 encode_sequence_maxsz + \
 591                                 encode_putfh_maxsz + \
 592                                 encode_lookup_maxsz + \
 593                                 encode_getattr_maxsz + \
 594                                 encode_getfh_maxsz)
 595 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_lookup_maxsz + \
 599                                 decode_getattr_maxsz + \
 600                                 decode_getfh_maxsz)
 601 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 602                                 encode_sequence_maxsz + \
 603                                 encode_putrootfh_maxsz + \
 604                                 encode_getattr_maxsz + \
 605                                 encode_getfh_maxsz)
 606 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 607                                 decode_sequence_maxsz + \
 608                                 decode_putrootfh_maxsz + \
 609                                 decode_getattr_maxsz + \
 610                                 decode_getfh_maxsz)
 611 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 612                                 encode_sequence_maxsz + \
 613                                 encode_putfh_maxsz + \
 614                                 encode_remove_maxsz)
 615 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 616                                 decode_sequence_maxsz + \
 617                                 decode_putfh_maxsz + \
 618                                 decode_remove_maxsz)
 619 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 620                                 encode_sequence_maxsz + \
 621                                 encode_putfh_maxsz + \
 622                                 encode_savefh_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_rename_maxsz)
 625 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_savefh_maxsz + \
 629                                 decode_putfh_maxsz + \
 630                                 decode_rename_maxsz)
 631 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 632                                 encode_sequence_maxsz + \
 633                                 encode_putfh_maxsz + \
 634                                 encode_savefh_maxsz + \
 635                                 encode_putfh_maxsz + \
 636                                 encode_link_maxsz + \
 637                                 encode_restorefh_maxsz + \
 638                                 encode_getattr_maxsz)
 639 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 640                                 decode_sequence_maxsz + \
 641                                 decode_putfh_maxsz + \
 642                                 decode_savefh_maxsz + \
 643                                 decode_putfh_maxsz + \
 644                                 decode_link_maxsz + \
 645                                 decode_restorefh_maxsz + \
 646                                 decode_getattr_maxsz)
 647 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 648                                 encode_sequence_maxsz + \
 649                                 encode_putfh_maxsz + \
 650                                 encode_symlink_maxsz + \
 651                                 encode_getattr_maxsz + \
 652                                 encode_getfh_maxsz)
 653 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 654                                 decode_sequence_maxsz + \
 655                                 decode_putfh_maxsz + \
 656                                 decode_symlink_maxsz + \
 657                                 decode_getattr_maxsz + \
 658                                 decode_getfh_maxsz)
 659 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 660                                 encode_sequence_maxsz + \
 661                                 encode_putfh_maxsz + \
 662                                 encode_create_maxsz + \
 663                                 encode_getfh_maxsz + \
 664                                 encode_getattr_maxsz)
 665 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 666                                 decode_sequence_maxsz + \
 667                                 decode_putfh_maxsz + \
 668                                 decode_create_maxsz + \
 669                                 decode_getfh_maxsz + \
 670                                 decode_getattr_maxsz)
 671 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 672                                 encode_sequence_maxsz + \
 673                                 encode_putfh_maxsz + \
 674                                 encode_getattr_maxsz)
 675 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_getattr_maxsz)
 679 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 680                                 encode_sequence_maxsz + \
 681                                 encode_putfh_maxsz + \
 682                                 encode_statfs_maxsz)
 683 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 684                                 decode_sequence_maxsz + \
 685                                 decode_putfh_maxsz + \
 686                                 decode_statfs_maxsz)
 687 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 688                                 encode_sequence_maxsz + \
 689                                 encode_putfh_maxsz + \
 690                                 encode_getattr_maxsz)
 691 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 692                                 decode_sequence_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_getattr_maxsz)
 695 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 696                                 encode_sequence_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_delegreturn_maxsz + \
 699                                 encode_getattr_maxsz)
 700 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 701                                 decode_sequence_maxsz + \
 702                                 decode_delegreturn_maxsz + \
 703                                 decode_getattr_maxsz)
 704 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 705                                 encode_sequence_maxsz + \
 706                                 encode_putfh_maxsz + \
 707                                 encode_getacl_maxsz)
 708 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 709                                 decode_sequence_maxsz + \
 710                                 decode_putfh_maxsz + \
 711                                 decode_getacl_maxsz)
 712 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 713                                 encode_sequence_maxsz + \
 714                                 encode_putfh_maxsz + \
 715                                 encode_setacl_maxsz)
 716 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 717                                 decode_sequence_maxsz + \
 718                                 decode_putfh_maxsz + \
 719                                 decode_setacl_maxsz)
 720 #define NFS4_enc_fs_locations_sz \
 721                                 (compound_encode_hdr_maxsz + \
 722                                  encode_sequence_maxsz + \
 723                                  encode_putfh_maxsz + \
 724                                  encode_lookup_maxsz + \
 725                                  encode_fs_locations_maxsz)
 726 #define NFS4_dec_fs_locations_sz \
 727                                 (compound_decode_hdr_maxsz + \
 728                                  decode_sequence_maxsz + \
 729                                  decode_putfh_maxsz + \
 730                                  decode_lookup_maxsz + \
 731                                  decode_fs_locations_maxsz)
 732 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 733                                 encode_sequence_maxsz + \
 734                                 encode_putfh_maxsz + \
 735                                 encode_secinfo_maxsz)
 736 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 737                                 decode_sequence_maxsz + \
 738                                 decode_putfh_maxsz + \
 739                                 decode_secinfo_maxsz)
 740 #if defined(CONFIG_NFS_V4_1)
 741 #define NFS4_enc_bind_conn_to_session_sz \
 742                                 (compound_encode_hdr_maxsz + \
 743                                  encode_bind_conn_to_session_maxsz)
 744 #define NFS4_dec_bind_conn_to_session_sz \
 745                                 (compound_decode_hdr_maxsz + \
 746                                  decode_bind_conn_to_session_maxsz)
 747 #define NFS4_enc_exchange_id_sz \
 748                                 (compound_encode_hdr_maxsz + \
 749                                  encode_exchange_id_maxsz)
 750 #define NFS4_dec_exchange_id_sz \
 751                                 (compound_decode_hdr_maxsz + \
 752                                  decode_exchange_id_maxsz)
 753 #define NFS4_enc_create_session_sz \
 754                                 (compound_encode_hdr_maxsz + \
 755                                  encode_create_session_maxsz)
 756 #define NFS4_dec_create_session_sz \
 757                                 (compound_decode_hdr_maxsz + \
 758                                  decode_create_session_maxsz)
 759 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 760                                          encode_destroy_session_maxsz)
 761 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 762                                          decode_destroy_session_maxsz)
 763 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 764                                          encode_destroy_clientid_maxsz)
 765 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 766                                          decode_destroy_clientid_maxsz)
 767 #define NFS4_enc_sequence_sz \
 768                                 (compound_decode_hdr_maxsz + \
 769                                  encode_sequence_maxsz)
 770 #define NFS4_dec_sequence_sz \
 771                                 (compound_decode_hdr_maxsz + \
 772                                  decode_sequence_maxsz)
 773 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 774                                          encode_sequence_maxsz + \
 775                                          encode_putrootfh_maxsz + \
 776                                          encode_fsinfo_maxsz)
 777 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 778                                          decode_sequence_maxsz + \
 779                                          decode_putrootfh_maxsz + \
 780                                          decode_fsinfo_maxsz)
 781 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 782                                          encode_sequence_maxsz + \
 783                                          encode_reclaim_complete_maxsz)
 784 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 785                                          decode_sequence_maxsz + \
 786                                          decode_reclaim_complete_maxsz)
 787 #define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
 788                                 encode_sequence_maxsz + \
 789                                 encode_putfh_maxsz + \
 790                                 encode_getdevicelist_maxsz)
 791 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 792                                 decode_sequence_maxsz + \
 793                                 decode_putfh_maxsz + \
 794                                 decode_getdevicelist_maxsz)
 795 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 796                                 encode_sequence_maxsz +\
 797                                 encode_getdeviceinfo_maxsz)
 798 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 799                                 decode_sequence_maxsz + \
 800                                 decode_getdeviceinfo_maxsz)
 801 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 802                                 encode_sequence_maxsz + \
 803                                 encode_putfh_maxsz +        \
 804                                 encode_layoutget_maxsz)
 805 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 806                                 decode_sequence_maxsz + \
 807                                 decode_putfh_maxsz +        \
 808                                 decode_layoutget_maxsz)
 809 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 810                                 encode_sequence_maxsz +\
 811                                 encode_putfh_maxsz + \
 812                                 encode_layoutcommit_maxsz + \
 813                                 encode_getattr_maxsz)
 814 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 815                                 decode_sequence_maxsz + \
 816                                 decode_putfh_maxsz + \
 817                                 decode_layoutcommit_maxsz + \
 818                                 decode_getattr_maxsz)
 819 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 820                                 encode_sequence_maxsz + \
 821                                 encode_putfh_maxsz + \
 822                                 encode_layoutreturn_maxsz)
 823 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 824                                 decode_sequence_maxsz + \
 825                                 decode_putfh_maxsz + \
 826                                 decode_layoutreturn_maxsz)
 827 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 828                                         encode_sequence_maxsz + \
 829                                         encode_putrootfh_maxsz +\
 830                                         encode_secinfo_no_name_maxsz)
 831 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 832                                         decode_sequence_maxsz + \
 833                                         decode_putrootfh_maxsz + \
 834                                         decode_secinfo_no_name_maxsz)
 835 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 836                                          encode_sequence_maxsz + \
 837                                          encode_test_stateid_maxsz)
 838 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 839                                          decode_sequence_maxsz + \
 840                                          decode_test_stateid_maxsz)
 841 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 842                                          encode_sequence_maxsz + \
 843                                          encode_free_stateid_maxsz)
 844 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 845                                          decode_sequence_maxsz + \
 846                                          decode_free_stateid_maxsz)
 847
 848 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 849                                       compound_encode_hdr_maxsz +
 850                                       encode_sequence_maxsz +
 851                                       encode_putfh_maxsz +
 852                                       encode_getattr_maxsz) *
 853                                      XDR_UNIT);
 854
 855 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 856                                      compound_decode_hdr_maxsz +
 857                                      decode_sequence_maxsz +
 858                                      decode_putfh_maxsz) *
 859                                     XDR_UNIT);
 860 #endif /* CONFIG_NFS_V4_1 */
 861
 862 static const umode_t nfs_type2fmt[] = {
 863         [NF4BAD] = 0,
 864         [NF4REG] = S_IFREG,
 865         [NF4DIR] = S_IFDIR,
 866         [NF4BLK] = S_IFBLK,
 867         [NF4CHR] = S_IFCHR,
 868         [NF4LNK] = S_IFLNK,
 869         [NF4SOCK] = S_IFSOCK,
 870         [NF4FIFO] = S_IFIFO,
 871         [NF4ATTRDIR] = 0,
 872         [NF4NAMEDATTR] = 0,
 873 };
 874
 875 struct compound_hdr {
 876         int32_t         status;
 877         uint32_t        nops;
 878         __be32 *        nops_p;
 879         uint32_t        taglen;
 880         char *          tag;
 881         uint32_t        replen;         /* expected reply words */
 882         u32             minorversion;
 883 };
 884
 885 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 886 {
 887         __be32 *p = xdr_reserve_space(xdr, nbytes);
 888         BUG_ON(!p);
 889         return p;
 890 }
 891
 892 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 893 {
 894         __be32 *p;
 895
 896         p = xdr_reserve_space(xdr, len);
 897         xdr_encode_opaque_fixed(p, buf, len);
 898 }
 899
 900 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 901 {
 902         __be32 *p;
 903
 904         p = reserve_space(xdr, 4 + len);
 905         xdr_encode_opaque(p, str, len);
 906 }
 907
 908 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 909 {
 910         __be32 *p;
 911
 912         p = reserve_space(xdr, 4);
 913         *p = cpu_to_be32(n);
 914 }
 915
 916 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 917 {
 918         __be32 *p;
 919
 920         p = reserve_space(xdr, 8);
 921         xdr_encode_hyper(p, n);
 922 }
 923
 924 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 925                 const struct nfs_seqid *seqid)
 926 {
 927         encode_uint32(xdr, seqid->sequence->counter);
 928 }
 929
 930 static void encode_compound_hdr(struct xdr_stream *xdr,
 931                                 struct rpc_rqst *req,
 932                                 struct compound_hdr *hdr)
 933 {
 934         __be32 *p;
 935         struct rpc_auth *auth = req->rq_cred->cr_auth;
 936
 937         /* initialize running count of expected bytes in reply.
 938          * NOTE: the replied tag SHOULD be the same is the one sent,
 939          * but this is not required as a MUST for the server to do so. */
 940         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 941
 942         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 943         encode_string(xdr, hdr->taglen, hdr->tag);
 944         p = reserve_space(xdr, 8);
 945         *p++ = cpu_to_be32(hdr->minorversion);
 946         hdr->nops_p = p;
 947         *p = cpu_to_be32(hdr->nops);
 948 }
 949
 950 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 951                 uint32_t replen,
 952                 struct compound_hdr *hdr)
 953 {
 954         encode_uint32(xdr, op);
 955         hdr->nops++;
 956         hdr->replen += replen;
 957 }
 958
 959 static void encode_nops(struct compound_hdr *hdr)
 960 {
 961         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 962         *hdr->nops_p = htonl(hdr->nops);
 963 }
 964
 965 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 966 {
 967         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 968 }
 969
 970 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 971 {
 972         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 973 }
 974
 975 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 976 {
 977         char owner_name[IDMAP_NAMESZ];
 978         char owner_group[IDMAP_NAMESZ];
 979         int owner_namelen = 0;
 980         int owner_grouplen = 0;
 981         __be32 *p;
 982         __be32 *q;
 983         int len;
 984         uint32_t bmval0 = 0;
 985         uint32_t bmval1 = 0;
 986
 987         /*
 988          * We reserve enough space to write the entire attribute buffer at once.
 989          * In the worst-case, this would be
 990          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 991          *          = 36 bytes, plus any contribution from variable-length fields
 992          *            such as owner/group.
 993          */
 994         len = 16;
 995
 996         /* Sigh */
 997         if (iap->ia_valid & ATTR_SIZE)
 998                 len += 8;
 999         if (iap->ia_valid & ATTR_MODE)
1000                 len += 4;
1001         if (iap->ia_valid & ATTR_UID) {
1002                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1003                 if (owner_namelen < 0) {
1004                         dprintk("nfs: couldn't resolve uid %d to string\n",
1005                                         from_kuid(&init_user_ns, iap->ia_uid));
1006                         /* XXX */
1007                         strcpy(owner_name, "nobody");
1008                         owner_namelen = sizeof("nobody") - 1;
1009                         /* goto out; */
1010                 }
1011                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1012         }
1013         if (iap->ia_valid & ATTR_GID) {
1014                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1015                 if (owner_grouplen < 0) {
1016                         dprintk("nfs: couldn't resolve gid %d to string\n",
1017                                         from_kgid(&init_user_ns, iap->ia_gid));
1018                         strcpy(owner_group, "nobody");
1019                         owner_grouplen = sizeof("nobody") - 1;
1020                         /* goto out; */
1021                 }
1022                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1023         }
1024         if (iap->ia_valid & ATTR_ATIME_SET)
1025                 len += 16;
1026         else if (iap->ia_valid & ATTR_ATIME)
1027                 len += 4;
1028         if (iap->ia_valid & ATTR_MTIME_SET)
1029                 len += 16;
1030         else if (iap->ia_valid & ATTR_MTIME)
1031                 len += 4;
1032         p = reserve_space(xdr, len);
1033
1034         /*
1035          * We write the bitmap length now, but leave the bitmap and the attribute
1036          * buffer length to be backfilled at the end of this routine.
1037          */
1038         *p++ = cpu_to_be32(2);
1039         q = p;
1040         p += 3;
1041
1042         if (iap->ia_valid & ATTR_SIZE) {
1043                 bmval0 |= FATTR4_WORD0_SIZE;
1044                 p = xdr_encode_hyper(p, iap->ia_size);
1045         }
1046         if (iap->ia_valid & ATTR_MODE) {
1047                 bmval1 |= FATTR4_WORD1_MODE;
1048                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1049         }
1050         if (iap->ia_valid & ATTR_UID) {
1051                 bmval1 |= FATTR4_WORD1_OWNER;
1052                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1053         }
1054         if (iap->ia_valid & ATTR_GID) {
1055                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
1056                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1057         }
1058         if (iap->ia_valid & ATTR_ATIME_SET) {
1059                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1060                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1061                 *p++ = cpu_to_be32(0);
1062                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
1063                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1064         }
1065         else if (iap->ia_valid & ATTR_ATIME) {
1066                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
1067                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1068         }
1069         if (iap->ia_valid & ATTR_MTIME_SET) {
1070                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1071                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1072                 *p++ = cpu_to_be32(0);
1073                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
1074                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1075         }
1076         else if (iap->ia_valid & ATTR_MTIME) {
1077                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
1078                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1079         }
1080
1081         /*
1082          * Now we backfill the bitmap and the attribute buffer length.
1083          */
1084         if (len != ((char *)p - (char *)q) + 4) {
1085                 printk(KERN_ERR "NFS: Attr length error, %u != %Zu\n",
1086                                 len, ((char *)p - (char *)q) + 4);
1087                 BUG();
1088         }
1089         len = (char *)p - (char *)q - 12;
1090         *q++ = htonl(bmval0);
1091         *q++ = htonl(bmval1);
1092         *q = htonl(len);
1093
1094 /* out: */
1095 }
1096
1097 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1098 {
1099         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1100         encode_uint32(xdr, access);
1101 }
1102
1103 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1104 {
1105         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1106         encode_nfs4_seqid(xdr, arg->seqid);
1107         encode_nfs4_stateid(xdr, arg->stateid);
1108 }
1109
1110 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1111 {
1112         __be32 *p;
1113
1114         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1115         p = reserve_space(xdr, 12);
1116         p = xdr_encode_hyper(p, args->offset);
1117         *p = cpu_to_be32(args->count);
1118 }
1119
1120 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1121 {
1122         __be32 *p;
1123
1124         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1125         encode_uint32(xdr, create->ftype);
1126
1127         switch (create->ftype) {
1128         case NF4LNK:
1129                 p = reserve_space(xdr, 4);
1130                 *p = cpu_to_be32(create->u.symlink.len);
1131                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1132                 break;
1133
1134         case NF4BLK: case NF4CHR:
1135                 p = reserve_space(xdr, 8);
1136                 *p++ = cpu_to_be32(create->u.device.specdata1);
1137                 *p = cpu_to_be32(create->u.device.specdata2);
1138                 break;
1139
1140         default:
1141                 break;
1142         }
1143
1144         encode_string(xdr, create->name->len, create->name->name);
1145         encode_attrs(xdr, create->attrs, create->server);
1146 }
1147
1148 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1149 {
1150         __be32 *p;
1151
1152         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1153         p = reserve_space(xdr, 8);
1154         *p++ = cpu_to_be32(1);
1155         *p = cpu_to_be32(bitmap);
1156 }
1157
1158 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1159 {
1160         __be32 *p;
1161
1162         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1163         p = reserve_space(xdr, 12);
1164         *p++ = cpu_to_be32(2);
1165         *p++ = cpu_to_be32(bm0);
1166         *p = cpu_to_be32(bm1);
1167 }
1168
1169 static void
1170 encode_getattr_three(struct xdr_stream *xdr,
1171                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1172                      struct compound_hdr *hdr)
1173 {
1174         __be32 *p;
1175
1176         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1177         if (bm2) {
1178                 p = reserve_space(xdr, 16);
1179                 *p++ = cpu_to_be32(3);
1180                 *p++ = cpu_to_be32(bm0);
1181                 *p++ = cpu_to_be32(bm1);
1182                 *p = cpu_to_be32(bm2);
1183         } else if (bm1) {
1184                 p = reserve_space(xdr, 12);
1185                 *p++ = cpu_to_be32(2);
1186                 *p++ = cpu_to_be32(bm0);
1187                 *p = cpu_to_be32(bm1);
1188         } else {
1189                 p = reserve_space(xdr, 8);
1190                 *p++ = cpu_to_be32(1);
1191                 *p = cpu_to_be32(bm0);
1192         }
1193 }
1194
1195 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1196 {
1197         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1198                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1199 }
1200
1201 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1202                                  const u32 *open_bitmap,
1203                                  struct compound_hdr *hdr)
1204 {
1205         encode_getattr_three(xdr,
1206                              bitmask[0] & open_bitmap[0],
1207                              bitmask[1] & open_bitmap[1],
1208                              bitmask[2] & open_bitmap[2],
1209                              hdr);
1210 }
1211
1212 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1213 {
1214         encode_getattr_three(xdr,
1215                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1216                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1217                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1218                              hdr);
1219 }
1220
1221 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1222 {
1223         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1224                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1225 }
1226
1227 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1228 {
1229         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1230 }
1231
1232 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1233 {
1234         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1235         encode_string(xdr, name->len, name->name);
1236 }
1237
1238 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1239 {
1240         if (fl->fl_type == F_RDLCK)
1241                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1242         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1243 }
1244
1245 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1246 {
1247         if (fl->fl_end == OFFSET_MAX)
1248                 return ~(uint64_t)0;
1249         return fl->fl_end - fl->fl_start + 1;
1250 }
1251
1252 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1253 {
1254         __be32 *p;
1255
1256         p = reserve_space(xdr, 32);
1257         p = xdr_encode_hyper(p, lowner->clientid);
1258         *p++ = cpu_to_be32(20);
1259         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1260         *p++ = cpu_to_be32(lowner->s_dev);
1261         xdr_encode_hyper(p, lowner->id);
1262 }
1263
1264 /*
1265  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1266  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1267  */
1268 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1269 {
1270         __be32 *p;
1271
1272         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1273         p = reserve_space(xdr, 28);
1274         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1275         *p++ = cpu_to_be32(args->reclaim);
1276         p = xdr_encode_hyper(p, args->fl->fl_start);
1277         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1278         *p = cpu_to_be32(args->new_lock_owner);
1279         if (args->new_lock_owner){
1280                 encode_nfs4_seqid(xdr, args->open_seqid);
1281                 encode_nfs4_stateid(xdr, args->open_stateid);
1282                 encode_nfs4_seqid(xdr, args->lock_seqid);
1283                 encode_lockowner(xdr, &args->lock_owner);
1284         }
1285         else {
1286                 encode_nfs4_stateid(xdr, args->lock_stateid);
1287                 encode_nfs4_seqid(xdr, args->lock_seqid);
1288         }
1289 }
1290
1291 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1292 {
1293         __be32 *p;
1294
1295         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1296         p = reserve_space(xdr, 20);
1297         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1298         p = xdr_encode_hyper(p, args->fl->fl_start);
1299         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1300         encode_lockowner(xdr, &args->lock_owner);
1301 }
1302
1303 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1304 {
1305         __be32 *p;
1306
1307         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1308         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1309         encode_nfs4_seqid(xdr, args->seqid);
1310         encode_nfs4_stateid(xdr, args->stateid);
1311         p = reserve_space(xdr, 16);
1312         p = xdr_encode_hyper(p, args->fl->fl_start);
1313         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1314 }
1315
1316 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1317 {
1318         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1319         encode_lockowner(xdr, lowner);
1320 }
1321
1322 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1323 {
1324         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1325         encode_string(xdr, name->len, name->name);
1326 }
1327
1328 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1329 {
1330         __be32 *p;
1331
1332         p = reserve_space(xdr, 8);
1333         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1334         case FMODE_READ:
1335                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1336                 break;
1337         case FMODE_WRITE:
1338                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1339                 break;
1340         case FMODE_READ|FMODE_WRITE:
1341                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1342                 break;
1343         default:
1344                 *p++ = cpu_to_be32(0);
1345         }
1346         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1347 }
1348
1349 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1350 {
1351         __be32 *p;
1352  /*
1353  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1354  * owner 4 = 32
1355  */
1356         encode_nfs4_seqid(xdr, arg->seqid);
1357         encode_share_access(xdr, arg->fmode);
1358         p = reserve_space(xdr, 36);
1359         p = xdr_encode_hyper(p, arg->clientid);
1360         *p++ = cpu_to_be32(24);
1361         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1362         *p++ = cpu_to_be32(arg->server->s_dev);
1363         *p++ = cpu_to_be32(arg->id.uniquifier);
1364         xdr_encode_hyper(p, arg->id.create_time);
1365 }
1366
1367 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1368 {
1369         __be32 *p;
1370         struct nfs_client *clp;
1371
1372         p = reserve_space(xdr, 4);
1373         switch(arg->open_flags & O_EXCL) {
1374         case 0:
1375                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1376                 encode_attrs(xdr, arg->u.attrs, arg->server);
1377                 break;
1378         default:
1379                 clp = arg->server->nfs_client;
1380                 if (clp->cl_mvops->minor_version > 0) {
1381                         if (nfs4_has_persistent_session(clp)) {
1382                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1383                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1384                         } else {
1385                                 struct iattr dummy;
1386
1387                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1388                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1389                                 dummy.ia_valid = 0;
1390                                 encode_attrs(xdr, &dummy, arg->server);
1391                         }
1392                 } else {
1393                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1394                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1395                 }
1396         }
1397 }
1398
1399 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401         __be32 *p;
1402
1403         p = reserve_space(xdr, 4);
1404         switch (arg->open_flags & O_CREAT) {
1405         case 0:
1406                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1407                 break;
1408         default:
1409                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1410                 encode_createmode(xdr, arg);
1411         }
1412 }
1413
1414 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1415 {
1416         __be32 *p;
1417
1418         p = reserve_space(xdr, 4);
1419         switch (delegation_type) {
1420         case 0:
1421                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1422                 break;
1423         case FMODE_READ:
1424                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1425                 break;
1426         case FMODE_WRITE|FMODE_READ:
1427                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1428                 break;
1429         default:
1430                 BUG();
1431         }
1432 }
1433
1434 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1435 {
1436         __be32 *p;
1437
1438         p = reserve_space(xdr, 4);
1439         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1440         encode_string(xdr, name->len, name->name);
1441 }
1442
1443 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1444 {
1445         __be32 *p;
1446
1447         p = reserve_space(xdr, 4);
1448         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1449         encode_delegation_type(xdr, type);
1450 }
1451
1452 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1453 {
1454         __be32 *p;
1455
1456         p = reserve_space(xdr, 4);
1457         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1458         encode_nfs4_stateid(xdr, stateid);
1459         encode_string(xdr, name->len, name->name);
1460 }
1461
1462 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1463 {
1464         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1465         encode_openhdr(xdr, arg);
1466         encode_opentype(xdr, arg);
1467         switch (arg->claim) {
1468         case NFS4_OPEN_CLAIM_NULL:
1469                 encode_claim_null(xdr, arg->name);
1470                 break;
1471         case NFS4_OPEN_CLAIM_PREVIOUS:
1472                 encode_claim_previous(xdr, arg->u.delegation_type);
1473                 break;
1474         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1475                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1476                 break;
1477         default:
1478                 BUG();
1479         }
1480 }
1481
1482 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1483 {
1484         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1485         encode_nfs4_stateid(xdr, arg->stateid);
1486         encode_nfs4_seqid(xdr, arg->seqid);
1487 }
1488
1489 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1490 {
1491         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1492         encode_nfs4_stateid(xdr, arg->stateid);
1493         encode_nfs4_seqid(xdr, arg->seqid);
1494         encode_share_access(xdr, arg->fmode);
1495 }
1496
1497 static void
1498 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1499 {
1500         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1501         encode_string(xdr, fh->size, fh->data);
1502 }
1503
1504 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1505 {
1506         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1507 }
1508
1509 static void encode_open_stateid(struct xdr_stream *xdr,
1510                 const struct nfs_open_context *ctx,
1511                 const struct nfs_lock_context *l_ctx,
1512                 fmode_t fmode,
1513                 int zero_seqid)
1514 {
1515         nfs4_stateid stateid;
1516
1517         if (ctx->state != NULL) {
1518                 const struct nfs_lockowner *lockowner = NULL;
1519
1520                 if (l_ctx != NULL)
1521                         lockowner = &l_ctx->lockowner;
1522                 nfs4_select_rw_stateid(&stateid, ctx->state,
1523                                 fmode, lockowner);
1524                 if (zero_seqid)
1525                         stateid.seqid = 0;
1526                 encode_nfs4_stateid(xdr, &stateid);
1527         } else
1528                 encode_nfs4_stateid(xdr, &zero_stateid);
1529 }
1530
1531 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1532 {
1533         __be32 *p;
1534
1535         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1536         encode_open_stateid(xdr, args->context, args->lock_context,
1537                         FMODE_READ, hdr->minorversion);
1538
1539         p = reserve_space(xdr, 12);
1540         p = xdr_encode_hyper(p, args->offset);
1541         *p = cpu_to_be32(args->count);
1542 }
1543
1544 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1545 {
1546         uint32_t attrs[2] = {
1547                 FATTR4_WORD0_RDATTR_ERROR,
1548                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1549         };
1550         uint32_t dircount = readdir->count >> 1;
1551         __be32 *p, verf[2];
1552
1553         if (readdir->plus) {
1554                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1555                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1556                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1557                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1558                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1559                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1560                 dircount >>= 1;
1561         }
1562         /* Use mounted_on_fileid only if the server supports it */
1563         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1564                 attrs[0] |= FATTR4_WORD0_FILEID;
1565
1566         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1567         encode_uint64(xdr, readdir->cookie);
1568         encode_nfs4_verifier(xdr, &readdir->verifier);
1569         p = reserve_space(xdr, 20);
1570         *p++ = cpu_to_be32(dircount);
1571         *p++ = cpu_to_be32(readdir->count);
1572         *p++ = cpu_to_be32(2);
1573
1574         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1575         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1576         memcpy(verf, readdir->verifier.data, sizeof(verf));
1577         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1578                         __func__,
1579                         (unsigned long long)readdir->cookie,
1580                         verf[0], verf[1],
1581                         attrs[0] & readdir->bitmask[0],
1582                         attrs[1] & readdir->bitmask[1]);
1583 }
1584
1585 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1586 {
1587         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1588 }
1589
1590 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1591 {
1592         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1593         encode_string(xdr, name->len, name->name);
1594 }
1595
1596 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1597 {
1598         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1599         encode_string(xdr, oldname->len, oldname->name);
1600         encode_string(xdr, newname->len, newname->name);
1601 }
1602
1603 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1604                          struct compound_hdr *hdr)
1605 {
1606         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1607         encode_uint64(xdr, clid);
1608 }
1609
1610 static void
1611 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1612 {
1613         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1614 }
1615
1616 static void
1617 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1618 {
1619         __be32 *p;
1620
1621         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1622         encode_nfs4_stateid(xdr, &zero_stateid);
1623         p = reserve_space(xdr, 2*4);
1624         *p++ = cpu_to_be32(1);
1625         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1626         p = reserve_space(xdr, 4);
1627         *p = cpu_to_be32(arg->acl_len);
1628         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1629 }
1630
1631 static void
1632 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1633 {
1634         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1635 }
1636
1637 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1638 {
1639         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1640         encode_nfs4_stateid(xdr, &arg->stateid);
1641         encode_attrs(xdr, arg->iap, server);
1642 }
1643
1644 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1645 {
1646         __be32 *p;
1647
1648         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1649         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1650
1651         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1652         p = reserve_space(xdr, 4);
1653         *p = cpu_to_be32(setclientid->sc_prog);
1654         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1655         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1656         p = reserve_space(xdr, 4);
1657         *p = cpu_to_be32(setclientid->sc_cb_ident);
1658 }
1659
1660 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1661 {
1662         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1663                         decode_setclientid_confirm_maxsz, hdr);
1664         encode_uint64(xdr, arg->clientid);
1665         encode_nfs4_verifier(xdr, &arg->confirm);
1666 }
1667
1668 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1669 {
1670         __be32 *p;
1671
1672         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1673         encode_open_stateid(xdr, args->context, args->lock_context,
1674                         FMODE_WRITE, hdr->minorversion);
1675
1676         p = reserve_space(xdr, 16);
1677         p = xdr_encode_hyper(p, args->offset);
1678         *p++ = cpu_to_be32(args->stable);
1679         *p = cpu_to_be32(args->count);
1680
1681         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1682 }
1683
1684 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1685 {
1686         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1687         encode_nfs4_stateid(xdr, stateid);
1688 }
1689
1690 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1691 {
1692         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1693         encode_string(xdr, name->len, name->name);
1694 }
1695
1696 #if defined(CONFIG_NFS_V4_1)
1697 /* NFSv4.1 operations */
1698 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1699                                    struct nfs4_session *session,
1700                                    struct compound_hdr *hdr)
1701 {
1702         __be32 *p;
1703
1704         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1705                 decode_bind_conn_to_session_maxsz, hdr);
1706         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1707         p = xdr_reserve_space(xdr, 8);
1708         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1709         *p = 0; /* use_conn_in_rdma_mode = False */
1710 }
1711
1712 static void encode_exchange_id(struct xdr_stream *xdr,
1713                                struct nfs41_exchange_id_args *args,
1714                                struct compound_hdr *hdr)
1715 {
1716         __be32 *p;
1717         char impl_name[IMPL_NAME_LIMIT];
1718         int len = 0;
1719
1720         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1721         encode_nfs4_verifier(xdr, args->verifier);
1722
1723         encode_string(xdr, args->id_len, args->id);
1724
1725         p = reserve_space(xdr, 12);
1726         *p++ = cpu_to_be32(args->flags);
1727         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1728
1729         if (send_implementation_id &&
1730             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1731             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1732                 <= sizeof(impl_name) + 1)
1733                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1734                                utsname()->sysname, utsname()->release,
1735                                utsname()->version, utsname()->machine);
1736
1737         if (len > 0) {
1738                 *p = cpu_to_be32(1);    /* implementation id array length=1 */
1739
1740                 encode_string(xdr,
1741                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1742                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1743                 encode_string(xdr, len, impl_name);
1744                 /* just send zeros for nii_date - the date is in nii_name */
1745                 p = reserve_space(xdr, 12);
1746                 p = xdr_encode_hyper(p, 0);
1747                 *p = cpu_to_be32(0);
1748         } else
1749                 *p = cpu_to_be32(0);    /* implementation id array length=0 */
1750 }
1751
1752 static void encode_create_session(struct xdr_stream *xdr,
1753                                   struct nfs41_create_session_args *args,
1754                                   struct compound_hdr *hdr)
1755 {
1756         __be32 *p;
1757         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1758         uint32_t len;
1759         struct nfs_client *clp = args->client;
1760         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1761         u32 max_resp_sz_cached;
1762
1763         /*
1764          * Assumes OPEN is the biggest non-idempotent compound.
1765          * 2 is the verifier.
1766          */
1767         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1768                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1769
1770         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1771                         clp->cl_ipaddr);
1772
1773         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1774         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1775         p = xdr_encode_hyper(p, clp->cl_clientid);
1776         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1777         *p++ = cpu_to_be32(args->flags);                        /*flags */
1778
1779         /* Fore Channel */
1780         *p++ = cpu_to_be32(0);                          /* header padding size */
1781         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1782         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1783         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1784         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1785         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1786         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1787
1788         /* Back Channel */
1789         *p++ = cpu_to_be32(0);                          /* header padding size */
1790         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1791         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1792         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1793         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1794         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1795         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1796
1797         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1798         *p++ = cpu_to_be32(1);
1799         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1800
1801         /* authsys_parms rfc1831 */
1802         *p++ = (__be32)nn->boot_time.tv_nsec;           /* stamp */
1803         p = xdr_encode_opaque(p, machine_name, len);
1804         *p++ = cpu_to_be32(0);                          /* UID */
1805         *p++ = cpu_to_be32(0);                          /* GID */
1806         *p = cpu_to_be32(0);                            /* No more gids */
1807 }
1808
1809 static void encode_destroy_session(struct xdr_stream *xdr,
1810                                    struct nfs4_session *session,
1811                                    struct compound_hdr *hdr)
1812 {
1813         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1814         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1815 }
1816
1817 static void encode_destroy_clientid(struct xdr_stream *xdr,
1818                                    uint64_t clientid,
1819                                    struct compound_hdr *hdr)
1820 {
1821         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1822         encode_uint64(xdr, clientid);
1823 }
1824
1825 static void encode_reclaim_complete(struct xdr_stream *xdr,
1826                                     struct nfs41_reclaim_complete_args *args,
1827                                     struct compound_hdr *hdr)
1828 {
1829         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1830         encode_uint32(xdr, args->one_fs);
1831 }
1832 #endif /* CONFIG_NFS_V4_1 */
1833
1834 static void encode_sequence(struct xdr_stream *xdr,
1835                             const struct nfs4_sequence_args *args,
1836                             struct compound_hdr *hdr)
1837 {
1838 #if defined(CONFIG_NFS_V4_1)
1839         struct nfs4_session *session;
1840         struct nfs4_slot_table *tp;
1841         struct nfs4_slot *slot = args->sa_slot;
1842         __be32 *p;
1843
1844         if (slot == NULL)
1845                 return;
1846
1847         tp = slot->table;
1848         session = tp->session;
1849
1850         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1851
1852         /*
1853          * Sessionid + seqid + slotid + max slotid + cache_this
1854          */
1855         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1856                 "max_slotid=%d cache_this=%d\n",
1857                 __func__,
1858                 ((u32 *)session->sess_id.data)[0],
1859                 ((u32 *)session->sess_id.data)[1],
1860                 ((u32 *)session->sess_id.data)[2],
1861                 ((u32 *)session->sess_id.data)[3],
1862                 slot->seq_nr, slot->slot_nr,
1863                 tp->highest_used_slotid, args->sa_cache_this);
1864         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1865         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1866         *p++ = cpu_to_be32(slot->seq_nr);
1867         *p++ = cpu_to_be32(slot->slot_nr);
1868         *p++ = cpu_to_be32(tp->highest_used_slotid);
1869         *p = cpu_to_be32(args->sa_cache_this);
1870 #endif /* CONFIG_NFS_V4_1 */
1871 }
1872
1873 #ifdef CONFIG_NFS_V4_1
1874 static void
1875 encode_getdevicelist(struct xdr_stream *xdr,
1876                      const struct nfs4_getdevicelist_args *args,
1877                      struct compound_hdr *hdr)
1878 {
1879         __be32 *p;
1880         nfs4_verifier dummy = {
1881                 .data = "dummmmmy",
1882         };
1883
1884         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1885         p = reserve_space(xdr, 16);
1886         *p++ = cpu_to_be32(args->layoutclass);
1887         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1888         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1889         encode_nfs4_verifier(xdr, &dummy);
1890 }
1891
1892 static void
1893 encode_getdeviceinfo(struct xdr_stream *xdr,
1894                      const struct nfs4_getdeviceinfo_args *args,
1895                      struct compound_hdr *hdr)
1896 {
1897         __be32 *p;
1898
1899         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1900         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1901         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1902                                     NFS4_DEVICEID4_SIZE);
1903         *p++ = cpu_to_be32(args->pdev->layout_type);
1904         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1905         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1906 }
1907
1908 static void
1909 encode_layoutget(struct xdr_stream *xdr,
1910                       const struct nfs4_layoutget_args *args,
1911                       struct compound_hdr *hdr)
1912 {
1913         __be32 *p;
1914
1915         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1916         p = reserve_space(xdr, 36);
1917         *p++ = cpu_to_be32(0);     /* Signal layout available */
1918         *p++ = cpu_to_be32(args->type);
1919         *p++ = cpu_to_be32(args->range.iomode);
1920         p = xdr_encode_hyper(p, args->range.offset);
1921         p = xdr_encode_hyper(p, args->range.length);
1922         p = xdr_encode_hyper(p, args->minlength);
1923         encode_nfs4_stateid(xdr, &args->stateid);
1924         encode_uint32(xdr, args->maxcount);
1925
1926         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1927                 __func__,
1928                 args->type,
1929                 args->range.iomode,
1930                 (unsigned long)args->range.offset,
1931                 (unsigned long)args->range.length,
1932                 args->maxcount);
1933 }
1934
1935 static int
1936 encode_layoutcommit(struct xdr_stream *xdr,
1937                     struct inode *inode,
1938                     const struct nfs4_layoutcommit_args *args,
1939                     struct compound_hdr *hdr)
1940 {
1941         __be32 *p;
1942
1943         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1944                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1945
1946         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1947         p = reserve_space(xdr, 20);
1948         /* Only whole file layouts */
1949         p = xdr_encode_hyper(p, 0); /* offset */
1950         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1951         *p = cpu_to_be32(0); /* reclaim */
1952         encode_nfs4_stateid(xdr, &args->stateid);
1953         p = reserve_space(xdr, 20);
1954         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1955         p = xdr_encode_hyper(p, args->lastbytewritten);
1956         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1957         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1958
1959         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
1960                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1961                         NFS_I(inode)->layout, xdr, args);
1962         else
1963                 encode_uint32(xdr, 0); /* no layout-type payload */
1964
1965         return 0;
1966 }
1967
1968 static void
1969 encode_layoutreturn(struct xdr_stream *xdr,
1970                     const struct nfs4_layoutreturn_args *args,
1971                     struct compound_hdr *hdr)
1972 {
1973         __be32 *p;
1974
1975         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
1976         p = reserve_space(xdr, 16);
1977         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
1978         *p++ = cpu_to_be32(args->layout_type);
1979         *p++ = cpu_to_be32(IOMODE_ANY);
1980         *p = cpu_to_be32(RETURN_FILE);
1981         p = reserve_space(xdr, 16);
1982         p = xdr_encode_hyper(p, 0);
1983         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
1984         spin_lock(&args->inode->i_lock);
1985         encode_nfs4_stateid(xdr, &args->stateid);
1986         spin_unlock(&args->inode->i_lock);
1987         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
1988                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
1989                         NFS_I(args->inode)->layout, xdr, args);
1990         } else
1991                 encode_uint32(xdr, 0);
1992 }
1993
1994 static int
1995 encode_secinfo_no_name(struct xdr_stream *xdr,
1996                        const struct nfs41_secinfo_no_name_args *args,
1997                        struct compound_hdr *hdr)
1998 {
1999         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2000         encode_uint32(xdr, args->style);
2001         return 0;
2002 }
2003
2004 static void encode_test_stateid(struct xdr_stream *xdr,
2005                                 struct nfs41_test_stateid_args *args,
2006                                 struct compound_hdr *hdr)
2007 {
2008         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2009         encode_uint32(xdr, 1);
2010         encode_nfs4_stateid(xdr, args->stateid);
2011 }
2012
2013 static void encode_free_stateid(struct xdr_stream *xdr,
2014                                 struct nfs41_free_stateid_args *args,
2015                                 struct compound_hdr *hdr)
2016 {
2017         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2018         encode_nfs4_stateid(xdr, args->stateid);
2019 }
2020 #endif /* CONFIG_NFS_V4_1 */
2021
2022 /*
2023  * END OF "GENERIC" ENCODE ROUTINES.
2024  */
2025
2026 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2027 {
2028 #if defined(CONFIG_NFS_V4_1)
2029
2030         if (args->sa_slot)
2031                 return args->sa_slot->table->session->clp->cl_mvops->minor_version;
2032 #endif /* CONFIG_NFS_V4_1 */
2033         return 0;
2034 }
2035
2036 /*
2037  * Encode an ACCESS request
2038  */
2039 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2040                                 const struct nfs4_accessargs *args)
2041 {
2042         struct compound_hdr hdr = {
2043                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2044         };
2045
2046         encode_compound_hdr(xdr, req, &hdr);
2047         encode_sequence(xdr, &args->seq_args, &hdr);
2048         encode_putfh(xdr, args->fh, &hdr);
2049         encode_access(xdr, args->access, &hdr);
2050         encode_getfattr(xdr, args->bitmask, &hdr);
2051         encode_nops(&hdr);
2052 }
2053
2054 /*
2055  * Encode LOOKUP request
2056  */
2057 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2058                                 const struct nfs4_lookup_arg *args)
2059 {
2060         struct compound_hdr hdr = {
2061                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2062         };
2063
2064         encode_compound_hdr(xdr, req, &hdr);
2065         encode_sequence(xdr, &args->seq_args, &hdr);
2066         encode_putfh(xdr, args->dir_fh, &hdr);
2067         encode_lookup(xdr, args->name, &hdr);
2068         encode_getfh(xdr, &hdr);
2069         encode_getfattr(xdr, args->bitmask, &hdr);
2070         encode_nops(&hdr);
2071 }
2072
2073 /*
2074  * Encode LOOKUP_ROOT request
2075  */
2076 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2077                                      struct xdr_stream *xdr,
2078                                      const struct nfs4_lookup_root_arg *args)
2079 {
2080         struct compound_hdr hdr = {
2081                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082         };
2083
2084         encode_compound_hdr(xdr, req, &hdr);
2085         encode_sequence(xdr, &args->seq_args, &hdr);
2086         encode_putrootfh(xdr, &hdr);
2087         encode_getfh(xdr, &hdr);
2088         encode_getfattr(xdr, args->bitmask, &hdr);
2089         encode_nops(&hdr);
2090 }
2091
2092 /*
2093  * Encode REMOVE request
2094  */
2095 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2096                                 const struct nfs_removeargs *args)
2097 {
2098         struct compound_hdr hdr = {
2099                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2100         };
2101
2102         encode_compound_hdr(xdr, req, &hdr);
2103         encode_sequence(xdr, &args->seq_args, &hdr);
2104         encode_putfh(xdr, args->fh, &hdr);
2105         encode_remove(xdr, &args->name, &hdr);
2106         encode_nops(&hdr);
2107 }
2108
2109 /*
2110  * Encode RENAME request
2111  */
2112 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                 const struct nfs_renameargs *args)
2114 {
2115         struct compound_hdr hdr = {
2116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117         };
2118
2119         encode_compound_hdr(xdr, req, &hdr);
2120         encode_sequence(xdr, &args->seq_args, &hdr);
2121         encode_putfh(xdr, args->old_dir, &hdr);
2122         encode_savefh(xdr, &hdr);
2123         encode_putfh(xdr, args->new_dir, &hdr);
2124         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2125         encode_nops(&hdr);
2126 }
2127
2128 /*
2129  * Encode LINK request
2130  */
2131 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2132                              const struct nfs4_link_arg *args)
2133 {
2134         struct compound_hdr hdr = {
2135                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136         };
2137
2138         encode_compound_hdr(xdr, req, &hdr);
2139         encode_sequence(xdr, &args->seq_args, &hdr);
2140         encode_putfh(xdr, args->fh, &hdr);
2141         encode_savefh(xdr, &hdr);
2142         encode_putfh(xdr, args->dir_fh, &hdr);
2143         encode_link(xdr, args->name, &hdr);
2144         encode_restorefh(xdr, &hdr);
2145         encode_getfattr(xdr, args->bitmask, &hdr);
2146         encode_nops(&hdr);
2147 }
2148
2149 /*
2150  * Encode CREATE request
2151  */
2152 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2153                                 const struct nfs4_create_arg *args)
2154 {
2155         struct compound_hdr hdr = {
2156                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157         };
2158
2159         encode_compound_hdr(xdr, req, &hdr);
2160         encode_sequence(xdr, &args->seq_args, &hdr);
2161         encode_putfh(xdr, args->dir_fh, &hdr);
2162         encode_create(xdr, args, &hdr);
2163         encode_getfh(xdr, &hdr);
2164         encode_getfattr(xdr, args->bitmask, &hdr);
2165         encode_nops(&hdr);
2166 }
2167
2168 /*
2169  * Encode SYMLINK request
2170  */
2171 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2172                                  const struct nfs4_create_arg *args)
2173 {
2174         nfs4_xdr_enc_create(req, xdr, args);
2175 }
2176
2177 /*
2178  * Encode GETATTR request
2179  */
2180 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2181                                  const struct nfs4_getattr_arg *args)
2182 {
2183         struct compound_hdr hdr = {
2184                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2185         };
2186
2187         encode_compound_hdr(xdr, req, &hdr);
2188         encode_sequence(xdr, &args->seq_args, &hdr);
2189         encode_putfh(xdr, args->fh, &hdr);
2190         encode_getfattr(xdr, args->bitmask, &hdr);
2191         encode_nops(&hdr);
2192 }
2193
2194 /*
2195  * Encode a CLOSE request
2196  */
2197 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2198                                struct nfs_closeargs *args)
2199 {
2200         struct compound_hdr hdr = {
2201                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2202         };
2203
2204         encode_compound_hdr(xdr, req, &hdr);
2205         encode_sequence(xdr, &args->seq_args, &hdr);
2206         encode_putfh(xdr, args->fh, &hdr);
2207         encode_close(xdr, args, &hdr);
2208         encode_getfattr(xdr, args->bitmask, &hdr);
2209         encode_nops(&hdr);
2210 }
2211
2212 /*
2213  * Encode an OPEN request
2214  */
2215 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2216                               struct nfs_openargs *args)
2217 {
2218         struct compound_hdr hdr = {
2219                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2220         };
2221
2222         encode_compound_hdr(xdr, req, &hdr);
2223         encode_sequence(xdr, &args->seq_args, &hdr);
2224         encode_putfh(xdr, args->fh, &hdr);
2225         encode_open(xdr, args, &hdr);
2226         encode_getfh(xdr, &hdr);
2227         if (args->access)
2228                 encode_access(xdr, args->access, &hdr);
2229         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2230         encode_nops(&hdr);
2231 }
2232
2233 /*
2234  * Encode an OPEN_CONFIRM request
2235  */
2236 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2237                                       struct xdr_stream *xdr,
2238                                       struct nfs_open_confirmargs *args)
2239 {
2240         struct compound_hdr hdr = {
2241                 .nops   = 0,
2242         };
2243
2244         encode_compound_hdr(xdr, req, &hdr);
2245         encode_putfh(xdr, args->fh, &hdr);
2246         encode_open_confirm(xdr, args, &hdr);
2247         encode_nops(&hdr);
2248 }
2249
2250 /*
2251  * Encode an OPEN request with no attributes.
2252  */
2253 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2254                                      struct xdr_stream *xdr,
2255                                      struct nfs_openargs *args)
2256 {
2257         struct compound_hdr hdr = {
2258                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2259         };
2260
2261         encode_compound_hdr(xdr, req, &hdr);
2262         encode_sequence(xdr, &args->seq_args, &hdr);
2263         encode_putfh(xdr, args->fh, &hdr);
2264         encode_open(xdr, args, &hdr);
2265         if (args->access)
2266                 encode_access(xdr, args->access, &hdr);
2267         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2268         encode_nops(&hdr);
2269 }
2270
2271 /*
2272  * Encode an OPEN_DOWNGRADE request
2273  */
2274 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2275                                         struct xdr_stream *xdr,
2276                                         struct nfs_closeargs *args)
2277 {
2278         struct compound_hdr hdr = {
2279                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2280         };
2281
2282         encode_compound_hdr(xdr, req, &hdr);
2283         encode_sequence(xdr, &args->seq_args, &hdr);
2284         encode_putfh(xdr, args->fh, &hdr);
2285         encode_open_downgrade(xdr, args, &hdr);
2286         encode_getfattr(xdr, args->bitmask, &hdr);
2287         encode_nops(&hdr);
2288 }
2289
2290 /*
2291  * Encode a LOCK request
2292  */
2293 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2294                               struct nfs_lock_args *args)
2295 {
2296         struct compound_hdr hdr = {
2297                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2298         };
2299
2300         encode_compound_hdr(xdr, req, &hdr);
2301         encode_sequence(xdr, &args->seq_args, &hdr);
2302         encode_putfh(xdr, args->fh, &hdr);
2303         encode_lock(xdr, args, &hdr);
2304         encode_nops(&hdr);
2305 }
2306
2307 /*
2308  * Encode a LOCKT request
2309  */
2310 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2311                                struct nfs_lockt_args *args)
2312 {
2313         struct compound_hdr hdr = {
2314                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2315         };
2316
2317         encode_compound_hdr(xdr, req, &hdr);
2318         encode_sequence(xdr, &args->seq_args, &hdr);
2319         encode_putfh(xdr, args->fh, &hdr);
2320         encode_lockt(xdr, args, &hdr);
2321         encode_nops(&hdr);
2322 }
2323
2324 /*
2325  * Encode a LOCKU request
2326  */
2327 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2328                                struct nfs_locku_args *args)
2329 {
2330         struct compound_hdr hdr = {
2331                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2332         };
2333
2334         encode_compound_hdr(xdr, req, &hdr);
2335         encode_sequence(xdr, &args->seq_args, &hdr);
2336         encode_putfh(xdr, args->fh, &hdr);
2337         encode_locku(xdr, args, &hdr);
2338         encode_nops(&hdr);
2339 }
2340
2341 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2342                                            struct xdr_stream *xdr,
2343                                         struct nfs_release_lockowner_args *args)
2344 {
2345         struct compound_hdr hdr = {
2346                 .minorversion = 0,
2347         };
2348
2349         encode_compound_hdr(xdr, req, &hdr);
2350         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2351         encode_nops(&hdr);
2352 }
2353
2354 /*
2355  * Encode a READLINK request
2356  */
2357 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2358                                   const struct nfs4_readlink *args)
2359 {
2360         struct compound_hdr hdr = {
2361                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2362         };
2363
2364         encode_compound_hdr(xdr, req, &hdr);
2365         encode_sequence(xdr, &args->seq_args, &hdr);
2366         encode_putfh(xdr, args->fh, &hdr);
2367         encode_readlink(xdr, args, req, &hdr);
2368
2369         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2370                         args->pgbase, args->pglen);
2371         encode_nops(&hdr);
2372 }
2373
2374 /*
2375  * Encode a READDIR request
2376  */
2377 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2378                                  const struct nfs4_readdir_arg *args)
2379 {
2380         struct compound_hdr hdr = {
2381                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2382         };
2383
2384         encode_compound_hdr(xdr, req, &hdr);
2385         encode_sequence(xdr, &args->seq_args, &hdr);
2386         encode_putfh(xdr, args->fh, &hdr);
2387         encode_readdir(xdr, args, req, &hdr);
2388
2389         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2390                          args->pgbase, args->count);
2391         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2392                         __func__, hdr.replen << 2, args->pages,
2393                         args->pgbase, args->count);
2394         encode_nops(&hdr);
2395 }
2396
2397 /*
2398  * Encode a READ request
2399  */
2400 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2401                               struct nfs_readargs *args)
2402 {
2403         struct compound_hdr hdr = {
2404                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2405         };
2406
2407         encode_compound_hdr(xdr, req, &hdr);
2408         encode_sequence(xdr, &args->seq_args, &hdr);
2409         encode_putfh(xdr, args->fh, &hdr);
2410         encode_read(xdr, args, &hdr);
2411
2412         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2413                          args->pages, args->pgbase, args->count);
2414         req->rq_rcv_buf.flags |= XDRBUF_READ;
2415         encode_nops(&hdr);
2416 }
2417
2418 /*
2419  * Encode an SETATTR request
2420  */
2421 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2422                                  struct nfs_setattrargs *args)
2423 {
2424         struct compound_hdr hdr = {
2425                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2426         };
2427
2428         encode_compound_hdr(xdr, req, &hdr);
2429         encode_sequence(xdr, &args->seq_args, &hdr);
2430         encode_putfh(xdr, args->fh, &hdr);
2431         encode_setattr(xdr, args, args->server, &hdr);
2432         encode_getfattr(xdr, args->bitmask, &hdr);
2433         encode_nops(&hdr);
2434 }
2435
2436 /*
2437  * Encode a GETACL request
2438  */
2439 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2440                                 struct nfs_getaclargs *args)
2441 {
2442         struct compound_hdr hdr = {
2443                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444         };
2445         uint32_t replen;
2446
2447         encode_compound_hdr(xdr, req, &hdr);
2448         encode_sequence(xdr, &args->seq_args, &hdr);
2449         encode_putfh(xdr, args->fh, &hdr);
2450         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2451         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2452
2453         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2454                 args->acl_pages, args->acl_pgbase, args->acl_len);
2455
2456         encode_nops(&hdr);
2457 }
2458
2459 /*
2460  * Encode a WRITE request
2461  */
2462 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2463                                struct nfs_writeargs *args)
2464 {
2465         struct compound_hdr hdr = {
2466                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2467         };
2468
2469         encode_compound_hdr(xdr, req, &hdr);
2470         encode_sequence(xdr, &args->seq_args, &hdr);
2471         encode_putfh(xdr, args->fh, &hdr);
2472         encode_write(xdr, args, &hdr);
2473         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2474         if (args->bitmask)
2475                 encode_getfattr(xdr, args->bitmask, &hdr);
2476         encode_nops(&hdr);
2477 }
2478
2479 /*
2480  *  a COMMIT request
2481  */
2482 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2483                                 struct nfs_commitargs *args)
2484 {
2485         struct compound_hdr hdr = {
2486                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2487         };
2488
2489         encode_compound_hdr(xdr, req, &hdr);
2490         encode_sequence(xdr, &args->seq_args, &hdr);
2491         encode_putfh(xdr, args->fh, &hdr);
2492         encode_commit(xdr, args, &hdr);
2493         encode_nops(&hdr);
2494 }
2495
2496 /*
2497  * FSINFO request
2498  */
2499 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2500                                 struct nfs4_fsinfo_arg *args)
2501 {
2502         struct compound_hdr hdr = {
2503                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2504         };
2505
2506         encode_compound_hdr(xdr, req, &hdr);
2507         encode_sequence(xdr, &args->seq_args, &hdr);
2508         encode_putfh(xdr, args->fh, &hdr);
2509         encode_fsinfo(xdr, args->bitmask, &hdr);
2510         encode_nops(&hdr);
2511 }
2512
2513 /*
2514  * a PATHCONF request
2515  */
2516 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                   const struct nfs4_pathconf_arg *args)
2518 {
2519         struct compound_hdr hdr = {
2520                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521         };
2522
2523         encode_compound_hdr(xdr, req, &hdr);
2524         encode_sequence(xdr, &args->seq_args, &hdr);
2525         encode_putfh(xdr, args->fh, &hdr);
2526         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2527                            &hdr);
2528         encode_nops(&hdr);
2529 }
2530
2531 /*
2532  * a STATFS request
2533  */
2534 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2535                                 const struct nfs4_statfs_arg *args)
2536 {
2537         struct compound_hdr hdr = {
2538                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539         };
2540
2541         encode_compound_hdr(xdr, req, &hdr);
2542         encode_sequence(xdr, &args->seq_args, &hdr);
2543         encode_putfh(xdr, args->fh, &hdr);
2544         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2545                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  * GETATTR_BITMAP request
2551  */
2552 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2553                                      struct xdr_stream *xdr,
2554                                      struct nfs4_server_caps_arg *args)
2555 {
2556         struct compound_hdr hdr = {
2557                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558         };
2559
2560         encode_compound_hdr(xdr, req, &hdr);
2561         encode_sequence(xdr, &args->seq_args, &hdr);
2562         encode_putfh(xdr, args->fhandle, &hdr);
2563         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2564                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2565                            FATTR4_WORD0_LINK_SUPPORT|
2566                            FATTR4_WORD0_SYMLINK_SUPPORT|
2567                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2568         encode_nops(&hdr);
2569 }
2570
2571 /*
2572  * a RENEW request
2573  */
2574 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2575                                struct nfs_client *clp)
2576 {
2577         struct compound_hdr hdr = {
2578                 .nops   = 0,
2579         };
2580
2581         encode_compound_hdr(xdr, req, &hdr);
2582         encode_renew(xdr, clp->cl_clientid, &hdr);
2583         encode_nops(&hdr);
2584 }
2585
2586 /*
2587  * a SETCLIENTID request
2588  */
2589 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2590                                      struct xdr_stream *xdr,
2591                                      struct nfs4_setclientid *sc)
2592 {
2593         struct compound_hdr hdr = {
2594                 .nops   = 0,
2595         };
2596
2597         encode_compound_hdr(xdr, req, &hdr);
2598         encode_setclientid(xdr, sc, &hdr);
2599         encode_nops(&hdr);
2600 }
2601
2602 /*
2603  * a SETCLIENTID_CONFIRM request
2604  */
2605 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2606                                              struct xdr_stream *xdr,
2607                                              struct nfs4_setclientid_res *arg)
2608 {
2609         struct compound_hdr hdr = {
2610                 .nops   = 0,
2611         };
2612         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2613
2614         encode_compound_hdr(xdr, req, &hdr);
2615         encode_setclientid_confirm(xdr, arg, &hdr);
2616         encode_putrootfh(xdr, &hdr);
2617         encode_fsinfo(xdr, lease_bitmap, &hdr);
2618         encode_nops(&hdr);
2619 }
2620
2621 /*
2622  * DELEGRETURN request
2623  */
2624 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2625                                      struct xdr_stream *xdr,
2626                                      const struct nfs4_delegreturnargs *args)
2627 {
2628         struct compound_hdr hdr = {
2629                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2630         };
2631
2632         encode_compound_hdr(xdr, req, &hdr);
2633         encode_sequence(xdr, &args->seq_args, &hdr);
2634         encode_putfh(xdr, args->fhandle, &hdr);
2635         encode_getfattr(xdr, args->bitmask, &hdr);
2636         encode_delegreturn(xdr, args->stateid, &hdr);
2637         encode_nops(&hdr);
2638 }
2639
2640 /*
2641  * Encode FS_LOCATIONS request
2642  */
2643 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2644                                       struct xdr_stream *xdr,
2645                                       struct nfs4_fs_locations_arg *args)
2646 {
2647         struct compound_hdr hdr = {
2648                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2649         };
2650         uint32_t replen;
2651
2652         encode_compound_hdr(xdr, req, &hdr);
2653         encode_sequence(xdr, &args->seq_args, &hdr);
2654         encode_putfh(xdr, args->dir_fh, &hdr);
2655         encode_lookup(xdr, args->name, &hdr);
2656         replen = hdr.replen;    /* get the attribute into args->page */
2657         encode_fs_locations(xdr, args->bitmask, &hdr);
2658
2659         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2660                         0, PAGE_SIZE);
2661         encode_nops(&hdr);
2662 }
2663
2664 /*
2665  * Encode SECINFO request
2666  */
2667 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2668                                 struct xdr_stream *xdr,
2669                                 struct nfs4_secinfo_arg *args)
2670 {
2671         struct compound_hdr hdr = {
2672                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2673         };
2674
2675         encode_compound_hdr(xdr, req, &hdr);
2676         encode_sequence(xdr, &args->seq_args, &hdr);
2677         encode_putfh(xdr, args->dir_fh, &hdr);
2678         encode_secinfo(xdr, args->name, &hdr);
2679         encode_nops(&hdr);
2680 }
2681
2682 #if defined(CONFIG_NFS_V4_1)
2683 /*
2684  * BIND_CONN_TO_SESSION request
2685  */
2686 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2687                                 struct xdr_stream *xdr,
2688                                 struct nfs_client *clp)
2689 {
2690         struct compound_hdr hdr = {
2691                 .minorversion = clp->cl_mvops->minor_version,
2692         };
2693
2694         encode_compound_hdr(xdr, req, &hdr);
2695         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2696         encode_nops(&hdr);
2697 }
2698
2699 /*
2700  * EXCHANGE_ID request
2701  */
2702 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2703                                      struct xdr_stream *xdr,
2704                                      struct nfs41_exchange_id_args *args)
2705 {
2706         struct compound_hdr hdr = {
2707                 .minorversion = args->client->cl_mvops->minor_version,
2708         };
2709
2710         encode_compound_hdr(xdr, req, &hdr);
2711         encode_exchange_id(xdr, args, &hdr);
2712         encode_nops(&hdr);
2713 }
2714
2715 /*
2716  * a CREATE_SESSION request
2717  */
2718 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2719                                         struct xdr_stream *xdr,
2720                                         struct nfs41_create_session_args *args)
2721 {
2722         struct compound_hdr hdr = {
2723                 .minorversion = args->client->cl_mvops->minor_version,
2724         };
2725
2726         encode_compound_hdr(xdr, req, &hdr);
2727         encode_create_session(xdr, args, &hdr);
2728         encode_nops(&hdr);
2729 }
2730
2731 /*
2732  * a DESTROY_SESSION request
2733  */
2734 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2735                                          struct xdr_stream *xdr,
2736                                          struct nfs4_session *session)
2737 {
2738         struct compound_hdr hdr = {
2739                 .minorversion = session->clp->cl_mvops->minor_version,
2740         };
2741
2742         encode_compound_hdr(xdr, req, &hdr);
2743         encode_destroy_session(xdr, session, &hdr);
2744         encode_nops(&hdr);
2745 }
2746
2747 /*
2748  * a DESTROY_CLIENTID request
2749  */
2750 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2751                                          struct xdr_stream *xdr,
2752                                          struct nfs_client *clp)
2753 {
2754         struct compound_hdr hdr = {
2755                 .minorversion = clp->cl_mvops->minor_version,
2756         };
2757
2758         encode_compound_hdr(xdr, req, &hdr);
2759         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2760         encode_nops(&hdr);
2761 }
2762
2763 /*
2764  * a SEQUENCE request
2765  */
2766 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2767                                   struct nfs4_sequence_args *args)
2768 {
2769         struct compound_hdr hdr = {
2770                 .minorversion = nfs4_xdr_minorversion(args),
2771         };
2772
2773         encode_compound_hdr(xdr, req, &hdr);
2774         encode_sequence(xdr, args, &hdr);
2775         encode_nops(&hdr);
2776 }
2777
2778 /*
2779  * a GET_LEASE_TIME request
2780  */
2781 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2782                                         struct xdr_stream *xdr,
2783                                         struct nfs4_get_lease_time_args *args)
2784 {
2785         struct compound_hdr hdr = {
2786                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2787         };
2788         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2789
2790         encode_compound_hdr(xdr, req, &hdr);
2791         encode_sequence(xdr, &args->la_seq_args, &hdr);
2792         encode_putrootfh(xdr, &hdr);
2793         encode_fsinfo(xdr, lease_bitmap, &hdr);
2794         encode_nops(&hdr);
2795 }
2796
2797 /*
2798  * a RECLAIM_COMPLETE request
2799  */
2800 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2801                                           struct xdr_stream *xdr,
2802                                 struct nfs41_reclaim_complete_args *args)
2803 {
2804         struct compound_hdr hdr = {
2805                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2806         };
2807
2808         encode_compound_hdr(xdr, req, &hdr);
2809         encode_sequence(xdr, &args->seq_args, &hdr);
2810         encode_reclaim_complete(xdr, args, &hdr);
2811         encode_nops(&hdr);
2812 }
2813
2814 /*
2815  * Encode GETDEVICELIST request
2816  */
2817 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2818                                        struct xdr_stream *xdr,
2819                                        struct nfs4_getdevicelist_args *args)
2820 {
2821         struct compound_hdr hdr = {
2822                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2823         };
2824
2825         encode_compound_hdr(xdr, req, &hdr);
2826         encode_sequence(xdr, &args->seq_args, &hdr);
2827         encode_putfh(xdr, args->fh, &hdr);
2828         encode_getdevicelist(xdr, args, &hdr);
2829         encode_nops(&hdr);
2830 }
2831
2832 /*
2833  * Encode GETDEVICEINFO request
2834  */
2835 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2836                                        struct xdr_stream *xdr,
2837                                        struct nfs4_getdeviceinfo_args *args)
2838 {
2839         struct compound_hdr hdr = {
2840                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2841         };
2842
2843         encode_compound_hdr(xdr, req, &hdr);
2844         encode_sequence(xdr, &args->seq_args, &hdr);
2845         encode_getdeviceinfo(xdr, args, &hdr);
2846
2847         /* set up reply kvec. Subtract notification bitmap max size (2)
2848          * so that notification bitmap is put in xdr_buf tail */
2849         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2850                          args->pdev->pages, args->pdev->pgbase,
2851                          args->pdev->pglen);
2852
2853         encode_nops(&hdr);
2854 }
2855
2856 /*
2857  *  Encode LAYOUTGET request
2858  */
2859 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2860                                    struct xdr_stream *xdr,
2861                                    struct nfs4_layoutget_args *args)
2862 {
2863         struct compound_hdr hdr = {
2864                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2865         };
2866
2867         encode_compound_hdr(xdr, req, &hdr);
2868         encode_sequence(xdr, &args->seq_args, &hdr);
2869         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2870         encode_layoutget(xdr, args, &hdr);
2871
2872         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2873             args->layout.pages, 0, args->layout.pglen);
2874
2875         encode_nops(&hdr);
2876 }
2877
2878 /*
2879  *  Encode LAYOUTCOMMIT request
2880  */
2881 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2882                                       struct xdr_stream *xdr,
2883                                       struct nfs4_layoutcommit_args *args)
2884 {
2885         struct nfs4_layoutcommit_data *data =
2886                 container_of(args, struct nfs4_layoutcommit_data, args);
2887         struct compound_hdr hdr = {
2888                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2889         };
2890
2891         encode_compound_hdr(xdr, req, &hdr);
2892         encode_sequence(xdr, &args->seq_args, &hdr);
2893         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2894         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2895         encode_getfattr(xdr, args->bitmask, &hdr);
2896         encode_nops(&hdr);
2897 }
2898
2899 /*
2900  * Encode LAYOUTRETURN request
2901  */
2902 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2903                                       struct xdr_stream *xdr,
2904                                       struct nfs4_layoutreturn_args *args)
2905 {
2906         struct compound_hdr hdr = {
2907                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2908         };
2909
2910         encode_compound_hdr(xdr, req, &hdr);
2911         encode_sequence(xdr, &args->seq_args, &hdr);
2912         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2913         encode_layoutreturn(xdr, args, &hdr);
2914         encode_nops(&hdr);
2915 }
2916
2917 /*
2918  * Encode SECINFO_NO_NAME request
2919  */
2920 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2921                                         struct xdr_stream *xdr,
2922                                         struct nfs41_secinfo_no_name_args *args)
2923 {
2924         struct compound_hdr hdr = {
2925                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2926         };
2927
2928         encode_compound_hdr(xdr, req, &hdr);
2929         encode_sequence(xdr, &args->seq_args, &hdr);
2930         encode_putrootfh(xdr, &hdr);
2931         encode_secinfo_no_name(xdr, args, &hdr);
2932         encode_nops(&hdr);
2933         return 0;
2934 }
2935
2936 /*
2937  *  Encode TEST_STATEID request
2938  */
2939 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2940                                       struct xdr_stream *xdr,
2941                                       struct nfs41_test_stateid_args *args)
2942 {
2943         struct compound_hdr hdr = {
2944                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2945         };
2946
2947         encode_compound_hdr(xdr, req, &hdr);
2948         encode_sequence(xdr, &args->seq_args, &hdr);
2949         encode_test_stateid(xdr, args, &hdr);
2950         encode_nops(&hdr);
2951 }
2952
2953 /*
2954  *  Encode FREE_STATEID request
2955  */
2956 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2957                                      struct xdr_stream *xdr,
2958                                      struct nfs41_free_stateid_args *args)
2959 {
2960         struct compound_hdr hdr = {
2961                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2962         };
2963
2964         encode_compound_hdr(xdr, req, &hdr);
2965         encode_sequence(xdr, &args->seq_args, &hdr);
2966         encode_free_stateid(xdr, args, &hdr);
2967         encode_nops(&hdr);
2968 }
2969 #endif /* CONFIG_NFS_V4_1 */
2970
2971 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2972 {
2973         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2974                 "Remaining buffer length is %tu words.\n",
2975                 func, xdr->end - xdr->p);
2976 }
2977
2978 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2979 {
2980         __be32 *p;
2981
2982         p = xdr_inline_decode(xdr, 4);
2983         if (unlikely(!p))
2984                 goto out_overflow;
2985         *len = be32_to_cpup(p);
2986         p = xdr_inline_decode(xdr, *len);
2987         if (unlikely(!p))
2988                 goto out_overflow;
2989         *string = (char *)p;
2990         return 0;
2991 out_overflow:
2992         print_overflow_msg(__func__, xdr);
2993         return -EIO;
2994 }
2995
2996 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2997 {
2998         __be32 *p;
2999
3000         p = xdr_inline_decode(xdr, 8);
3001         if (unlikely(!p))
3002                 goto out_overflow;
3003         hdr->status = be32_to_cpup(p++);
3004         hdr->taglen = be32_to_cpup(p);
3005
3006         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3007         if (unlikely(!p))
3008                 goto out_overflow;
3009         hdr->tag = (char *)p;
3010         p += XDR_QUADLEN(hdr->taglen);
3011         hdr->nops = be32_to_cpup(p);
3012         if (unlikely(hdr->nops < 1))
3013                 return nfs4_stat_to_errno(hdr->status);
3014         return 0;
3015 out_overflow:
3016         print_overflow_msg(__func__, xdr);
3017         return -EIO;
3018 }
3019
3020 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3021 {
3022         __be32 *p;
3023         uint32_t opnum;
3024         int32_t nfserr;
3025
3026         p = xdr_inline_decode(xdr, 8);
3027         if (unlikely(!p))
3028                 goto out_overflow;
3029         opnum = be32_to_cpup(p++);
3030         if (opnum != expected) {
3031                 dprintk("nfs: Server returned operation"
3032                         " %d but we issued a request for %d\n",
3033                                 opnum, expected);
3034                 return -EIO;
3035         }
3036         nfserr = be32_to_cpup(p);
3037         if (nfserr != NFS_OK)
3038                 return nfs4_stat_to_errno(nfserr);
3039         return 0;
3040 out_overflow:
3041         print_overflow_msg(__func__, xdr);
3042         return -EIO;
3043 }
3044
3045 /* Dummy routine */
3046 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3047 {
3048         __be32 *p;
3049         unsigned int strlen;
3050         char *str;
3051
3052         p = xdr_inline_decode(xdr, 12);
3053         if (likely(p))
3054                 return decode_opaque_inline(xdr, &strlen, &str);
3055         print_overflow_msg(__func__, xdr);
3056         return -EIO;
3057 }
3058
3059 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3060 {
3061         uint32_t bmlen;
3062         __be32 *p;
3063
3064         p = xdr_inline_decode(xdr, 4);
3065         if (unlikely(!p))
3066                 goto out_overflow;
3067         bmlen = be32_to_cpup(p);
3068
3069         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3070         p = xdr_inline_decode(xdr, (bmlen << 2));
3071         if (unlikely(!p))
3072                 goto out_overflow;
3073         if (bmlen > 0) {
3074                 bitmap[0] = be32_to_cpup(p++);
3075                 if (bmlen > 1) {
3076                         bitmap[1] = be32_to_cpup(p++);
3077                         if (bmlen > 2)
3078                                 bitmap[2] = be32_to_cpup(p);
3079                 }
3080         }
3081         return 0;
3082 out_overflow:
3083         print_overflow_msg(__func__, xdr);
3084         return -EIO;
3085 }
3086
3087 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3088 {
3089         __be32 *p;
3090
3091         p = xdr_inline_decode(xdr, 4);
3092         if (unlikely(!p))
3093                 goto out_overflow;
3094         *attrlen = be32_to_cpup(p);
3095         *savep = xdr_stream_pos(xdr);
3096         return 0;
3097 out_overflow:
3098         print_overflow_msg(__func__, xdr);
3099         return -EIO;
3100 }
3101
3102 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3103 {
3104         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3105                 int ret;
3106                 ret = decode_attr_bitmap(xdr, bitmask);
3107                 if (unlikely(ret < 0))
3108                         return ret;
3109                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3110         } else
3111                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3112         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3113                 bitmask[0], bitmask[1], bitmask[2]);
3114         return 0;
3115 }
3116
3117 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3118 {
3119         __be32 *p;
3120         int ret = 0;
3121
3122         *type = 0;
3123         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3124                 return -EIO;
3125         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3126                 p = xdr_inline_decode(xdr, 4);
3127                 if (unlikely(!p))
3128                         goto out_overflow;
3129                 *type = be32_to_cpup(p);
3130                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3131                         dprintk("%s: bad type %d\n", __func__, *type);
3132                         return -EIO;
3133                 }
3134                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3135                 ret = NFS_ATTR_FATTR_TYPE;
3136         }
3137         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3138         return ret;
3139 out_overflow:
3140         print_overflow_msg(__func__, xdr);
3141         return -EIO;
3142 }
3143
3144 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3145                                       uint32_t *bitmap, uint32_t *type)
3146 {
3147         __be32 *p;
3148
3149         *type = 0;
3150         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3151                 return -EIO;
3152         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3153                 p = xdr_inline_decode(xdr, 4);
3154                 if (unlikely(!p))
3155                         goto out_overflow;
3156                 *type = be32_to_cpup(p);
3157                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3158         }
3159         dprintk("%s: expire type=0x%x\n", __func__, *type);
3160         return 0;
3161 out_overflow:
3162         print_overflow_msg(__func__, xdr);
3163         return -EIO;
3164 }
3165
3166 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3167 {
3168         __be32 *p;
3169         int ret = 0;
3170
3171         *change = 0;
3172         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3173                 return -EIO;
3174         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3175                 p = xdr_inline_decode(xdr, 8);
3176                 if (unlikely(!p))
3177                         goto out_overflow;
3178                 xdr_decode_hyper(p, change);
3179                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3180                 ret = NFS_ATTR_FATTR_CHANGE;
3181         }
3182         dprintk("%s: change attribute=%Lu\n", __func__,
3183                         (unsigned long long)*change);
3184         return ret;
3185 out_overflow:
3186         print_overflow_msg(__func__, xdr);
3187         return -EIO;
3188 }
3189
3190 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3191 {
3192         __be32 *p;
3193         int ret = 0;
3194
3195         *size = 0;
3196         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3197                 return -EIO;
3198         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3199                 p = xdr_inline_decode(xdr, 8);
3200                 if (unlikely(!p))
3201                         goto out_overflow;
3202                 xdr_decode_hyper(p, size);
3203                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3204                 ret = NFS_ATTR_FATTR_SIZE;
3205         }
3206         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3207         return ret;
3208 out_overflow:
3209         print_overflow_msg(__func__, xdr);
3210         return -EIO;
3211 }
3212
3213 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3214 {
3215         __be32 *p;
3216
3217         *res = 0;
3218         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3219                 return -EIO;
3220         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3221                 p = xdr_inline_decode(xdr, 4);
3222                 if (unlikely(!p))
3223                         goto out_overflow;
3224                 *res = be32_to_cpup(p);
3225                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3226         }
3227         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3228         return 0;
3229 out_overflow:
3230         print_overflow_msg(__func__, xdr);
3231         return -EIO;
3232 }
3233
3234 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3235 {
3236         __be32 *p;
3237
3238         *res = 0;
3239         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3240                 return -EIO;
3241         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3242                 p = xdr_inline_decode(xdr, 4);
3243                 if (unlikely(!p))
3244                         goto out_overflow;
3245                 *res = be32_to_cpup(p);
3246                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3247         }
3248         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3249         return 0;
3250 out_overflow:
3251         print_overflow_msg(__func__, xdr);
3252         return -EIO;
3253 }
3254
3255 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3256 {
3257         __be32 *p;
3258         int ret = 0;
3259
3260         fsid->major = 0;
3261         fsid->minor = 0;
3262         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3263                 return -EIO;
3264         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3265                 p = xdr_inline_decode(xdr, 16);
3266                 if (unlikely(!p))
3267                         goto out_overflow;
3268                 p = xdr_decode_hyper(p, &fsid->major);
3269                 xdr_decode_hyper(p, &fsid->minor);
3270                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3271                 ret = NFS_ATTR_FATTR_FSID;
3272         }
3273         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3274                         (unsigned long long)fsid->major,
3275                         (unsigned long long)fsid->minor);
3276         return ret;
3277 out_overflow:
3278         print_overflow_msg(__func__, xdr);
3279         return -EIO;
3280 }
3281
3282 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3283 {
3284         __be32 *p;
3285
3286         *res = 60;
3287         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3288                 return -EIO;
3289         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3290                 p = xdr_inline_decode(xdr, 4);
3291                 if (unlikely(!p))
3292                         goto out_overflow;
3293                 *res = be32_to_cpup(p);
3294                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3295         }
3296         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3297         return 0;
3298 out_overflow:
3299         print_overflow_msg(__func__, xdr);
3300         return -EIO;
3301 }
3302
3303 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3304 {
3305         __be32 *p;
3306
3307         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3308                 return -EIO;
3309         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3310                 p = xdr_inline_decode(xdr, 4);
3311                 if (unlikely(!p))
3312                         goto out_overflow;
3313                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3314                 *res = -be32_to_cpup(p);
3315         }
3316         return 0;
3317 out_overflow:
3318         print_overflow_msg(__func__, xdr);
3319         return -EIO;
3320 }
3321
3322 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3323 {
3324         __be32 *p;
3325         int len;
3326
3327         if (fh != NULL)
3328                 memset(fh, 0, sizeof(*fh));
3329
3330         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3331                 return -EIO;
3332         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3333                 p = xdr_inline_decode(xdr, 4);
3334                 if (unlikely(!p))
3335                         goto out_overflow;
3336                 len = be32_to_cpup(p);
3337                 if (len > NFS4_FHSIZE)
3338                         return -EIO;
3339                 p = xdr_inline_decode(xdr, len);
3340                 if (unlikely(!p))
3341                         goto out_overflow;
3342                 if (fh != NULL) {
3343                         memcpy(fh->data, p, len);
3344                         fh->size = len;
3345                 }
3346                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3347         }
3348         return 0;
3349 out_overflow:
3350         print_overflow_msg(__func__, xdr);
3351         return -EIO;
3352 }
3353
3354 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3355 {
3356         __be32 *p;
3357
3358         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3359         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3360                 return -EIO;
3361         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3362                 p = xdr_inline_decode(xdr, 4);
3363                 if (unlikely(!p))
3364                         goto out_overflow;
3365                 *res = be32_to_cpup(p);
3366                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3367         }
3368         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3369         return 0;
3370 out_overflow:
3371         print_overflow_msg(__func__, xdr);
3372         return -EIO;
3373 }
3374
3375 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3376 {
3377         __be32 *p;
3378         int ret = 0;
3379
3380         *fileid = 0;
3381         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3382                 return -EIO;
3383         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3384                 p = xdr_inline_decode(xdr, 8);
3385                 if (unlikely(!p))
3386                         goto out_overflow;
3387                 xdr_decode_hyper(p, fileid);
3388                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3389                 ret = NFS_ATTR_FATTR_FILEID;
3390         }
3391         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3392         return ret;
3393 out_overflow:
3394         print_overflow_msg(__func__, xdr);
3395         return -EIO;
3396 }
3397
3398 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3399 {
3400         __be32 *p;
3401         int ret = 0;
3402
3403         *fileid = 0;
3404         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3405                 return -EIO;
3406         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3407                 p = xdr_inline_decode(xdr, 8);
3408                 if (unlikely(!p))
3409                         goto out_overflow;
3410                 xdr_decode_hyper(p, fileid);
3411                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3412                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3413         }
3414         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3415         return ret;
3416 out_overflow:
3417         print_overflow_msg(__func__, xdr);
3418         return -EIO;
3419 }
3420
3421 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3422 {
3423         __be32 *p;
3424         int status = 0;
3425
3426         *res = 0;
3427         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3428                 return -EIO;
3429         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3430                 p = xdr_inline_decode(xdr, 8);
3431                 if (unlikely(!p))
3432                         goto out_overflow;
3433                 xdr_decode_hyper(p, res);
3434                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3435         }
3436         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3437         return status;
3438 out_overflow:
3439         print_overflow_msg(__func__, xdr);
3440         return -EIO;
3441 }
3442
3443 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3444 {
3445         __be32 *p;
3446         int status = 0;
3447
3448         *res = 0;
3449         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3450                 return -EIO;
3451         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3452                 p = xdr_inline_decode(xdr, 8);
3453                 if (unlikely(!p))
3454                         goto out_overflow;
3455                 xdr_decode_hyper(p, res);
3456                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3457         }
3458         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3459         return status;
3460 out_overflow:
3461         print_overflow_msg(__func__, xdr);
3462         return -EIO;
3463 }
3464
3465 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3466 {
3467         __be32 *p;
3468         int status = 0;
3469
3470         *res = 0;
3471         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3472                 return -EIO;
3473         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3474                 p = xdr_inline_decode(xdr, 8);
3475                 if (unlikely(!p))
3476                         goto out_overflow;
3477                 xdr_decode_hyper(p, res);
3478                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3479         }
3480         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3481         return status;
3482 out_overflow:
3483         print_overflow_msg(__func__, xdr);
3484         return -EIO;
3485 }
3486
3487 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3488 {
3489         u32 n;
3490         __be32 *p;
3491         int status = 0;
3492
3493         p = xdr_inline_decode(xdr, 4);
3494         if (unlikely(!p))
3495                 goto out_overflow;
3496         n = be32_to_cpup(p);
3497         if (n == 0)
3498                 goto root_path;
3499         dprintk("pathname4: ");
3500         path->ncomponents = 0;
3501         while (path->ncomponents < n) {
3502                 struct nfs4_string *component = &path->components[path->ncomponents];
3503                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3504                 if (unlikely(status != 0))
3505                         goto out_eio;
3506                 ifdebug (XDR)
3507                         pr_cont("%s%.*s ",
3508                                 (path->ncomponents != n ? "/ " : ""),
3509                                 component->len, component->data);
3510                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3511                         path->ncomponents++;
3512                 else {
3513                         dprintk("cannot parse %d components in path\n", n);
3514                         goto out_eio;
3515                 }
3516         }
3517 out:
3518         return status;
3519 root_path:
3520 /* a root pathname is sent as a zero component4 */
3521         path->ncomponents = 1;
3522         path->components[0].len=0;
3523         path->components[0].data=NULL;
3524         dprintk("pathname4: /\n");
3525         goto out;
3526 out_eio:
3527         dprintk(" status %d", status);
3528         status = -EIO;
3529         goto out;
3530 out_overflow:
3531         print_overflow_msg(__func__, xdr);
3532         return -EIO;
3533 }
3534
3535 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3536 {
3537         int n;
3538         __be32 *p;
3539         int status = -EIO;
3540
3541         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3542                 goto out;
3543         status = 0;
3544         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3545                 goto out;
3546         status = -EIO;
3547         /* Ignore borken servers that return unrequested attrs */
3548         if (unlikely(res == NULL))
3549                 goto out;
3550         dprintk("%s: fsroot:\n", __func__);
3551         status = decode_pathname(xdr, &res->fs_path);
3552         if (unlikely(status != 0))
3553                 goto out;
3554         p = xdr_inline_decode(xdr, 4);
3555         if (unlikely(!p))
3556                 goto out_overflow;
3557         n = be32_to_cpup(p);
3558         if (n <= 0)
3559                 goto out_eio;
3560         res->nlocations = 0;
3561         while (res->nlocations < n) {
3562                 u32 m;
3563                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3564
3565                 p = xdr_inline_decode(xdr, 4);
3566                 if (unlikely(!p))
3567                         goto out_overflow;
3568                 m = be32_to_cpup(p);
3569
3570                 loc->nservers = 0;
3571                 dprintk("%s: servers:\n", __func__);
3572                 while (loc->nservers < m) {
3573                         struct nfs4_string *server = &loc->servers[loc->nservers];
3574                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3575                         if (unlikely(status != 0))
3576                                 goto out_eio;
3577                         dprintk("%s ", server->data);
3578                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3579                                 loc->nservers++;
3580                         else {
3581                                 unsigned int i;
3582                                 dprintk("%s: using first %u of %u servers "
3583                                         "returned for location %u\n",
3584                                                 __func__,
3585                                                 NFS4_FS_LOCATION_MAXSERVERS,
3586                                                 m, res->nlocations);
3587                                 for (i = loc->nservers; i < m; i++) {
3588                                         unsigned int len;
3589                                         char *data;
3590                                         status = decode_opaque_inline(xdr, &len, &data);
3591                                         if (unlikely(status != 0))
3592                                                 goto out_eio;
3593                                 }
3594                         }
3595                 }
3596                 status = decode_pathname(xdr, &loc->rootpath);
3597                 if (unlikely(status != 0))
3598                         goto out_eio;
3599                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3600                         res->nlocations++;
3601         }
3602         if (res->nlocations != 0)
3603                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3604 out:
3605         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3606         return status;
3607 out_overflow:
3608         print_overflow_msg(__func__, xdr);
3609 out_eio:
3610         status = -EIO;
3611         goto out;
3612 }
3613
3614 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3615 {
3616         __be32 *p;
3617         int status = 0;
3618
3619         *res = 0;
3620         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3621                 return -EIO;
3622         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3623                 p = xdr_inline_decode(xdr, 8);
3624                 if (unlikely(!p))
3625                         goto out_overflow;
3626                 xdr_decode_hyper(p, res);
3627                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3628         }
3629         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3630         return status;
3631 out_overflow:
3632         print_overflow_msg(__func__, xdr);
3633         return -EIO;
3634 }
3635
3636 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3637 {
3638         __be32 *p;
3639         int status = 0;
3640
3641         *maxlink = 1;
3642         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3643                 return -EIO;
3644         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3645                 p = xdr_inline_decode(xdr, 4);
3646                 if (unlikely(!p))
3647                         goto out_overflow;
3648                 *maxlink = be32_to_cpup(p);
3649                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3650         }
3651         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3652         return status;
3653 out_overflow:
3654         print_overflow_msg(__func__, xdr);
3655         return -EIO;
3656 }
3657
3658 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3659 {
3660         __be32 *p;
3661         int status = 0;
3662
3663         *maxname = 1024;
3664         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3665                 return -EIO;
3666         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3667                 p = xdr_inline_decode(xdr, 4);
3668                 if (unlikely(!p))
3669                         goto out_overflow;
3670                 *maxname = be32_to_cpup(p);
3671                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3672         }
3673         dprintk("%s: maxname=%u\n", __func__, *maxname);
3674         return status;
3675 out_overflow:
3676         print_overflow_msg(__func__, xdr);
3677         return -EIO;
3678 }
3679
3680 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3681 {
3682         __be32 *p;
3683         int status = 0;
3684
3685         *res = 1024;
3686         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3687                 return -EIO;
3688         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3689                 uint64_t maxread;
3690                 p = xdr_inline_decode(xdr, 8);
3691                 if (unlikely(!p))
3692                         goto out_overflow;
3693                 xdr_decode_hyper(p, &maxread);
3694                 if (maxread > 0x7FFFFFFF)
3695                         maxread = 0x7FFFFFFF;
3696                 *res = (uint32_t)maxread;
3697                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3698         }
3699         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3700         return status;
3701 out_overflow:
3702         print_overflow_msg(__func__, xdr);
3703         return -EIO;
3704 }
3705
3706 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3707 {
3708         __be32 *p;
3709         int status = 0;
3710
3711         *res = 1024;
3712         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3713                 return -EIO;
3714         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3715                 uint64_t maxwrite;
3716                 p = xdr_inline_decode(xdr, 8);
3717                 if (unlikely(!p))
3718                         goto out_overflow;
3719                 xdr_decode_hyper(p, &maxwrite);
3720                 if (maxwrite > 0x7FFFFFFF)
3721                         maxwrite = 0x7FFFFFFF;
3722                 *res = (uint32_t)maxwrite;
3723                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3724         }
3725         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3726         return status;
3727 out_overflow:
3728         print_overflow_msg(__func__, xdr);
3729         return -EIO;
3730 }
3731
3732 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3733 {
3734         uint32_t tmp;
3735         __be32 *p;
3736         int ret = 0;
3737
3738         *mode = 0;
3739         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3740                 return -EIO;
3741         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3742                 p = xdr_inline_decode(xdr, 4);
3743                 if (unlikely(!p))
3744                         goto out_overflow;
3745                 tmp = be32_to_cpup(p);
3746                 *mode = tmp & ~S_IFMT;
3747                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3748                 ret = NFS_ATTR_FATTR_MODE;
3749         }
3750         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3751         return ret;
3752 out_overflow:
3753         print_overflow_msg(__func__, xdr);
3754         return -EIO;
3755 }
3756
3757 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3758 {
3759         __be32 *p;
3760         int ret = 0;
3761
3762         *nlink = 1;
3763         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3764                 return -EIO;
3765         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3766                 p = xdr_inline_decode(xdr, 4);
3767                 if (unlikely(!p))
3768                         goto out_overflow;
3769                 *nlink = be32_to_cpup(p);
3770                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3771                 ret = NFS_ATTR_FATTR_NLINK;
3772         }
3773         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3774         return ret;
3775 out_overflow:
3776         print_overflow_msg(__func__, xdr);
3777         return -EIO;
3778 }
3779
3780 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3781                 const struct nfs_server *server, kuid_t *uid,
3782                 struct nfs4_string *owner_name)
3783 {
3784         uint32_t len;
3785         __be32 *p;
3786         int ret = 0;
3787
3788         *uid = make_kuid(&init_user_ns, -2);
3789         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3790                 return -EIO;
3791         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3792                 p = xdr_inline_decode(xdr, 4);
3793                 if (unlikely(!p))
3794                         goto out_overflow;
3795                 len = be32_to_cpup(p);
3796                 p = xdr_inline_decode(xdr, len);
3797                 if (unlikely(!p))
3798                         goto out_overflow;
3799                 if (owner_name != NULL) {
3800                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3801                         if (owner_name->data != NULL) {
3802                                 owner_name->len = len;
3803                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3804                         }
3805                 } else if (len < XDR_MAX_NETOBJ) {
3806                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3807                                 ret = NFS_ATTR_FATTR_OWNER;
3808                         else
3809                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3810                                                 __func__);
3811                 } else
3812                         dprintk("%s: name too long (%u)!\n",
3813                                         __func__, len);
3814                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3815         }
3816         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3817         return ret;
3818 out_overflow:
3819         print_overflow_msg(__func__, xdr);
3820         return -EIO;
3821 }
3822
3823 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3824                 const struct nfs_server *server, kgid_t *gid,
3825                 struct nfs4_string *group_name)
3826 {
3827         uint32_t len;
3828         __be32 *p;
3829         int ret = 0;
3830
3831         *gid = make_kgid(&init_user_ns, -2);
3832         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3833                 return -EIO;
3834         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3835                 p = xdr_inline_decode(xdr, 4);
3836                 if (unlikely(!p))
3837                         goto out_overflow;
3838                 len = be32_to_cpup(p);
3839                 p = xdr_inline_decode(xdr, len);
3840                 if (unlikely(!p))
3841                         goto out_overflow;
3842                 if (group_name != NULL) {
3843                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3844                         if (group_name->data != NULL) {
3845                                 group_name->len = len;
3846                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3847                         }
3848                 } else if (len < XDR_MAX_NETOBJ) {
3849                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3850                                 ret = NFS_ATTR_FATTR_GROUP;
3851                         else
3852                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3853                                                 __func__);
3854                 } else
3855                         dprintk("%s: name too long (%u)!\n",
3856                                         __func__, len);
3857                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3858         }
3859         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3860         return ret;
3861 out_overflow:
3862         print_overflow_msg(__func__, xdr);
3863         return -EIO;
3864 }
3865
3866 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3867 {
3868         uint32_t major = 0, minor = 0;
3869         __be32 *p;
3870         int ret = 0;
3871
3872         *rdev = MKDEV(0,0);
3873         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3874                 return -EIO;
3875         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3876                 dev_t tmp;
3877
3878                 p = xdr_inline_decode(xdr, 8);
3879                 if (unlikely(!p))
3880                         goto out_overflow;
3881                 major = be32_to_cpup(p++);
3882                 minor = be32_to_cpup(p);
3883                 tmp = MKDEV(major, minor);
3884                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3885                         *rdev = tmp;
3886                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3887                 ret = NFS_ATTR_FATTR_RDEV;
3888         }
3889         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3890         return ret;
3891 out_overflow:
3892         print_overflow_msg(__func__, xdr);
3893         return -EIO;
3894 }
3895
3896 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3897 {
3898         __be32 *p;
3899         int status = 0;
3900
3901         *res = 0;
3902         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3903                 return -EIO;
3904         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3905                 p = xdr_inline_decode(xdr, 8);
3906                 if (unlikely(!p))
3907                         goto out_overflow;
3908                 xdr_decode_hyper(p, res);
3909                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3910         }
3911         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3912         return status;
3913 out_overflow:
3914         print_overflow_msg(__func__, xdr);
3915         return -EIO;
3916 }
3917
3918 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3919 {
3920         __be32 *p;
3921         int status = 0;
3922
3923         *res = 0;
3924         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3925                 return -EIO;
3926         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3927                 p = xdr_inline_decode(xdr, 8);
3928                 if (unlikely(!p))
3929                         goto out_overflow;
3930                 xdr_decode_hyper(p, res);
3931                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3932         }
3933         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3934         return status;
3935 out_overflow:
3936         print_overflow_msg(__func__, xdr);
3937         return -EIO;
3938 }
3939
3940 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3941 {
3942         __be32 *p;
3943         int status = 0;
3944
3945         *res = 0;
3946         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3947                 return -EIO;
3948         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3949                 p = xdr_inline_decode(xdr, 8);
3950                 if (unlikely(!p))
3951                         goto out_overflow;
3952                 xdr_decode_hyper(p, res);
3953                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3954         }
3955         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3956         return status;
3957 out_overflow:
3958         print_overflow_msg(__func__, xdr);
3959         return -EIO;
3960 }
3961
3962 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3963 {
3964         __be32 *p;
3965         int ret = 0;
3966
3967         *used = 0;
3968         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3969                 return -EIO;
3970         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3971                 p = xdr_inline_decode(xdr, 8);
3972                 if (unlikely(!p))
3973                         goto out_overflow;
3974                 xdr_decode_hyper(p, used);
3975                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3976                 ret = NFS_ATTR_FATTR_SPACE_USED;
3977         }
3978         dprintk("%s: space used=%Lu\n", __func__,
3979                         (unsigned long long)*used);
3980         return ret;
3981 out_overflow:
3982         print_overflow_msg(__func__, xdr);
3983         return -EIO;
3984 }
3985
3986 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3987 {
3988         __be32 *p;
3989         uint64_t sec;
3990         uint32_t nsec;
3991
3992         p = xdr_inline_decode(xdr, 12);
3993         if (unlikely(!p))
3994                 goto out_overflow;
3995         p = xdr_decode_hyper(p, &sec);
3996         nsec = be32_to_cpup(p);
3997         time->tv_sec = (time_t)sec;
3998         time->tv_nsec = (long)nsec;
3999         return 0;
4000 out_overflow:
4001         print_overflow_msg(__func__, xdr);
4002         return -EIO;
4003 }
4004
4005 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4006 {
4007         int status = 0;
4008
4009         time->tv_sec = 0;
4010         time->tv_nsec = 0;
4011         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4012                 return -EIO;
4013         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4014                 status = decode_attr_time(xdr, time);
4015                 if (status == 0)
4016                         status = NFS_ATTR_FATTR_ATIME;
4017                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4018         }
4019         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4020         return status;
4021 }
4022
4023 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4024 {
4025         int status = 0;
4026
4027         time->tv_sec = 0;
4028         time->tv_nsec = 0;
4029         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4030                 return -EIO;
4031         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4032                 status = decode_attr_time(xdr, time);
4033                 if (status == 0)
4034                         status = NFS_ATTR_FATTR_CTIME;
4035                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4036         }
4037         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4038         return status;
4039 }
4040
4041 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4042                                   struct timespec *time)
4043 {
4044         int status = 0;
4045
4046         time->tv_sec = 0;
4047         time->tv_nsec = 0;
4048         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4049                 return -EIO;
4050         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4051                 status = decode_attr_time(xdr, time);
4052                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4053         }
4054         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4055                 (long)time->tv_nsec);
4056         return status;
4057 }
4058
4059 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4060 {
4061         int status = 0;
4062
4063         time->tv_sec = 0;
4064         time->tv_nsec = 0;
4065         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4066                 return -EIO;
4067         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4068                 status = decode_attr_time(xdr, time);
4069                 if (status == 0)
4070                         status = NFS_ATTR_FATTR_MTIME;
4071                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4072         }
4073         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4074         return status;
4075 }
4076
4077 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4078 {
4079         unsigned int attrwords = XDR_QUADLEN(attrlen);
4080         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4081
4082         if (unlikely(attrwords != nwords)) {
4083                 dprintk("%s: server returned incorrect attribute length: "
4084                         "%u %c %u\n",
4085                                 __func__,
4086                                 attrwords << 2,
4087                                 (attrwords < nwords) ? '<' : '>',
4088                                 nwords << 2);
4089                 return -EIO;
4090         }
4091         return 0;
4092 }
4093
4094 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4095 {
4096         __be32 *p;
4097
4098         p = xdr_inline_decode(xdr, 20);
4099         if (unlikely(!p))
4100                 goto out_overflow;
4101         cinfo->atomic = be32_to_cpup(p++);
4102         p = xdr_decode_hyper(p, &cinfo->before);
4103         xdr_decode_hyper(p, &cinfo->after);
4104         return 0;
4105 out_overflow:
4106         print_overflow_msg(__func__, xdr);
4107         return -EIO;
4108 }
4109
4110 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4111 {
4112         __be32 *p;
4113         uint32_t supp, acc;
4114         int status;
4115
4116         status = decode_op_hdr(xdr, OP_ACCESS);
4117         if (status)
4118                 return status;
4119         p = xdr_inline_decode(xdr, 8);
4120         if (unlikely(!p))
4121                 goto out_overflow;
4122         supp = be32_to_cpup(p++);
4123         acc = be32_to_cpup(p);
4124         *supported = supp;
4125         *access = acc;
4126         return 0;
4127 out_overflow:
4128         print_overflow_msg(__func__, xdr);
4129         return -EIO;
4130 }
4131
4132 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4133 {
4134         __be32 *p;
4135
4136         p = xdr_inline_decode(xdr, len);
4137         if (likely(p)) {
4138                 memcpy(buf, p, len);
4139                 return 0;
4140         }
4141         print_overflow_msg(__func__, xdr);
4142         return -EIO;
4143 }
4144
4145 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4146 {
4147         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4148 }
4149
4150 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4151 {
4152         int status;
4153
4154         status = decode_op_hdr(xdr, OP_CLOSE);
4155         if (status != -EIO)
4156                 nfs_increment_open_seqid(status, res->seqid);
4157         if (!status)
4158                 status = decode_stateid(xdr, &res->stateid);
4159         return status;
4160 }
4161
4162 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4163 {
4164         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4165 }
4166
4167 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4168 {
4169         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4170 }
4171
4172 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4173 {
4174         int status;
4175
4176         status = decode_op_hdr(xdr, OP_COMMIT);
4177         if (!status)
4178                 status = decode_write_verifier(xdr, &res->verf->verifier);
4179         return status;
4180 }
4181
4182 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4183 {
4184         __be32 *p;
4185         uint32_t bmlen;
4186         int status;
4187
4188         status = decode_op_hdr(xdr, OP_CREATE);
4189         if (status)
4190                 return status;
4191         if ((status = decode_change_info(xdr, cinfo)))
4192                 return status;
4193         p = xdr_inline_decode(xdr, 4);
4194         if (unlikely(!p))
4195                 goto out_overflow;
4196         bmlen = be32_to_cpup(p);
4197         p = xdr_inline_decode(xdr, bmlen << 2);
4198         if (likely(p))
4199                 return 0;
4200 out_overflow:
4201         print_overflow_msg(__func__, xdr);
4202         return -EIO;
4203 }
4204
4205 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4206 {
4207         unsigned int savep;
4208         uint32_t attrlen, bitmap[3] = {0};
4209         int status;
4210
4211         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4212                 goto xdr_error;
4213         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4214                 goto xdr_error;
4215         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4216                 goto xdr_error;
4217         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4218                 goto xdr_error;
4219         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4220                                                  &res->fh_expire_type)) != 0)
4221                 goto xdr_error;
4222         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4223                 goto xdr_error;
4224         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4225                 goto xdr_error;
4226         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4227                 goto xdr_error;
4228         status = verify_attr_len(xdr, savep, attrlen);
4229 xdr_error:
4230         dprintk("%s: xdr returned %d!\n", __func__, -status);
4231         return status;
4232 }
4233
4234 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4235 {
4236         unsigned int savep;
4237         uint32_t attrlen, bitmap[3] = {0};
4238         int status;
4239
4240         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4241                 goto xdr_error;
4242         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4243                 goto xdr_error;
4244         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4245                 goto xdr_error;
4246
4247         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4248                 goto xdr_error;
4249         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4250                 goto xdr_error;
4251         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4252                 goto xdr_error;
4253         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4254                 goto xdr_error;
4255         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4256                 goto xdr_error;
4257         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4258                 goto xdr_error;
4259
4260         status = verify_attr_len(xdr, savep, attrlen);
4261 xdr_error:
4262         dprintk("%s: xdr returned %d!\n", __func__, -status);
4263         return status;
4264 }
4265
4266 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4267 {
4268         unsigned int savep;
4269         uint32_t attrlen, bitmap[3] = {0};
4270         int status;
4271
4272         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4273                 goto xdr_error;
4274         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4275                 goto xdr_error;
4276         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4277                 goto xdr_error;
4278
4279         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4280                 goto xdr_error;
4281         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4282                 goto xdr_error;
4283
4284         status = verify_attr_len(xdr, savep, attrlen);
4285 xdr_error:
4286         dprintk("%s: xdr returned %d!\n", __func__, -status);
4287         return status;
4288 }
4289
4290 static int decode_threshold_hint(struct xdr_stream *xdr,
4291                                   uint32_t *bitmap,
4292                                   uint64_t *res,
4293                                   uint32_t hint_bit)
4294 {
4295         __be32 *p;
4296
4297         *res = 0;
4298         if (likely(bitmap[0] & hint_bit)) {
4299                 p = xdr_inline_decode(xdr, 8);
4300                 if (unlikely(!p))
4301                         goto out_overflow;
4302                 xdr_decode_hyper(p, res);
4303         }
4304         return 0;
4305 out_overflow:
4306         print_overflow_msg(__func__, xdr);
4307         return -EIO;
4308 }
4309
4310 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4311                                         struct nfs4_threshold *res)
4312 {
4313         __be32 *p;
4314         unsigned int savep;
4315         uint32_t bitmap[3] = {0,}, attrlen;
4316         int status;
4317
4318         /* layout type */
4319         p = xdr_inline_decode(xdr, 4);
4320         if (unlikely(!p)) {
4321                 print_overflow_msg(__func__, xdr);
4322                 return -EIO;
4323         }
4324         res->l_type = be32_to_cpup(p);
4325
4326         /* thi_hintset bitmap */
4327         status = decode_attr_bitmap(xdr, bitmap);
4328         if (status < 0)
4329                 goto xdr_error;
4330
4331         /* thi_hintlist length */
4332         status = decode_attr_length(xdr, &attrlen, &savep);
4333         if (status < 0)
4334                 goto xdr_error;
4335         /* thi_hintlist */
4336         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4337         if (status < 0)
4338                 goto xdr_error;
4339         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4340         if (status < 0)
4341                 goto xdr_error;
4342         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4343                                        THRESHOLD_RD_IO);
4344         if (status < 0)
4345                 goto xdr_error;
4346         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4347                                        THRESHOLD_WR_IO);
4348         if (status < 0)
4349                 goto xdr_error;
4350
4351         status = verify_attr_len(xdr, savep, attrlen);
4352         res->bm = bitmap[0];
4353
4354         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4355                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4356                 res->wr_io_sz);
4357 xdr_error:
4358         dprintk("%s ret=%d!\n", __func__, status);
4359         return status;
4360 }
4361
4362 /*
4363  * Thresholds on pNFS direct I/O vrs MDS I/O
4364  */
4365 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4366                                     uint32_t *bitmap,
4367                                     struct nfs4_threshold *res)
4368 {
4369         __be32 *p;
4370         int status = 0;
4371         uint32_t num;
4372
4373         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4374                 return -EIO;
4375         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4376                 /* Did the server return an unrequested attribute? */
4377                 if (unlikely(res == NULL))
4378                         return -EREMOTEIO;
4379                 p = xdr_inline_decode(xdr, 4);
4380                 if (unlikely(!p))
4381                         goto out_overflow;
4382                 num = be32_to_cpup(p);
4383                 if (num == 0)
4384                         return 0;
4385                 if (num > 1)
4386                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4387                                 "drivers per filesystem not supported\n",
4388                                 __func__);
4389
4390                 status = decode_first_threshold_item4(xdr, res);
4391                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4392         }
4393         return status;
4394 out_overflow:
4395         print_overflow_msg(__func__, xdr);
4396         return -EIO;
4397 }
4398
4399 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4400                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4401                 struct nfs4_fs_locations *fs_loc,
4402                 const struct nfs_server *server)
4403 {
4404         int status;
4405         umode_t fmode = 0;
4406         uint32_t type;
4407         int32_t err;
4408
4409         status = decode_attr_type(xdr, bitmap, &type);
4410         if (status < 0)
4411                 goto xdr_error;
4412         fattr->mode = 0;
4413         if (status != 0) {
4414                 fattr->mode |= nfs_type2fmt[type];
4415                 fattr->valid |= status;
4416         }
4417
4418         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4419         if (status < 0)
4420                 goto xdr_error;
4421         fattr->valid |= status;
4422
4423         status = decode_attr_size(xdr, bitmap, &fattr->size);
4424         if (status < 0)
4425                 goto xdr_error;
4426         fattr->valid |= status;
4427
4428         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4429         if (status < 0)
4430                 goto xdr_error;
4431         fattr->valid |= status;
4432
4433         err = 0;
4434         status = decode_attr_error(xdr, bitmap, &err);
4435         if (status < 0)
4436                 goto xdr_error;
4437
4438         status = decode_attr_filehandle(xdr, bitmap, fh);
4439         if (status < 0)
4440                 goto xdr_error;
4441
4442         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4443         if (status < 0)
4444                 goto xdr_error;
4445         fattr->valid |= status;
4446
4447         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4448         if (status < 0)
4449                 goto xdr_error;
4450         fattr->valid |= status;
4451
4452         status = decode_attr_mode(xdr, bitmap, &fmode);
4453         if (status < 0)
4454                 goto xdr_error;
4455         if (status != 0) {
4456                 fattr->mode |= fmode;
4457                 fattr->valid |= status;
4458         }
4459
4460         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4461         if (status < 0)
4462                 goto xdr_error;
4463         fattr->valid |= status;
4464
4465         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4466         if (status < 0)
4467                 goto xdr_error;
4468         fattr->valid |= status;
4469
4470         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4471         if (status < 0)
4472                 goto xdr_error;
4473         fattr->valid |= status;
4474
4475         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4476         if (status < 0)
4477                 goto xdr_error;
4478         fattr->valid |= status;
4479
4480         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4481         if (status < 0)
4482                 goto xdr_error;
4483         fattr->valid |= status;
4484
4485         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4486         if (status < 0)
4487                 goto xdr_error;
4488         fattr->valid |= status;
4489
4490         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4491         if (status < 0)
4492                 goto xdr_error;
4493         fattr->valid |= status;
4494
4495         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4496         if (status < 0)
4497                 goto xdr_error;
4498         fattr->valid |= status;
4499
4500         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4501         if (status < 0)
4502                 goto xdr_error;
4503         fattr->valid |= status;
4504
4505         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4506         if (status < 0)
4507                 goto xdr_error;
4508
4509 xdr_error:
4510         dprintk("%s: xdr returned %d\n", __func__, -status);
4511         return status;
4512 }
4513
4514 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4515                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4516                 const struct nfs_server *server)
4517 {
4518         unsigned int savep;
4519         uint32_t attrlen,
4520                  bitmap[3] = {0};
4521         int status;
4522
4523         status = decode_op_hdr(xdr, OP_GETATTR);
4524         if (status < 0)
4525                 goto xdr_error;
4526
4527         status = decode_attr_bitmap(xdr, bitmap);
4528         if (status < 0)
4529                 goto xdr_error;
4530
4531         status = decode_attr_length(xdr, &attrlen, &savep);
4532         if (status < 0)
4533                 goto xdr_error;
4534
4535         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4536         if (status < 0)
4537                 goto xdr_error;
4538
4539         status = verify_attr_len(xdr, savep, attrlen);
4540 xdr_error:
4541         dprintk("%s: xdr returned %d\n", __func__, -status);
4542         return status;
4543 }
4544
4545 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4546                 const struct nfs_server *server)
4547 {
4548         return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4549 }
4550
4551 /*
4552  * Decode potentially multiple layout types. Currently we only support
4553  * one layout driver per file system.
4554  */
4555 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4556                                          uint32_t *layouttype)
4557 {
4558         uint32_t *p;
4559         int num;
4560
4561         p = xdr_inline_decode(xdr, 4);
4562         if (unlikely(!p))
4563                 goto out_overflow;
4564         num = be32_to_cpup(p);
4565
4566         /* pNFS is not supported by the underlying file system */
4567         if (num == 0) {
4568                 *layouttype = 0;
4569                 return 0;
4570         }
4571         if (num > 1)
4572                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4573                         "drivers per filesystem not supported\n", __func__);
4574
4575         /* Decode and set first layout type, move xdr->p past unused types */
4576         p = xdr_inline_decode(xdr, num * 4);
4577         if (unlikely(!p))
4578                 goto out_overflow;
4579         *layouttype = be32_to_cpup(p);
4580         return 0;
4581 out_overflow:
4582         print_overflow_msg(__func__, xdr);
4583         return -EIO;
4584 }
4585
4586 /*
4587  * The type of file system exported.
4588  * Note we must ensure that layouttype is set in any non-error case.
4589  */
4590 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4591                                 uint32_t *layouttype)
4592 {
4593         int status = 0;
4594
4595         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4596         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4597                 return -EIO;
4598         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4599                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4600                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4601         } else
4602                 *layouttype = 0;
4603         return status;
4604 }
4605
4606 /*
4607  * The prefered block size for layout directed io
4608  */
4609 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4610                                       uint32_t *res)
4611 {
4612         __be32 *p;
4613
4614         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4615         *res = 0;
4616         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4617                 p = xdr_inline_decode(xdr, 4);
4618                 if (unlikely(!p)) {
4619                         print_overflow_msg(__func__, xdr);
4620                         return -EIO;
4621                 }
4622                 *res = be32_to_cpup(p);
4623                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4624         }
4625         return 0;
4626 }
4627
4628 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4629 {
4630         unsigned int savep;
4631         uint32_t attrlen, bitmap[3];
4632         int status;
4633
4634         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4635                 goto xdr_error;
4636         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4637                 goto xdr_error;
4638         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4639                 goto xdr_error;
4640
4641         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4642
4643         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4644                 goto xdr_error;
4645         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4646                 goto xdr_error;
4647         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4648                 goto xdr_error;
4649         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4650         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4651                 goto xdr_error;
4652         fsinfo->wtpref = fsinfo->wtmax;
4653         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4654         if (status != 0)
4655                 goto xdr_error;
4656         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4657         if (status != 0)
4658                 goto xdr_error;
4659         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4660         if (status)
4661                 goto xdr_error;
4662
4663         status = verify_attr_len(xdr, savep, attrlen);
4664 xdr_error:
4665         dprintk("%s: xdr returned %d!\n", __func__, -status);
4666         return status;
4667 }
4668
4669 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4670 {
4671         __be32 *p;
4672         uint32_t len;
4673         int status;
4674
4675         /* Zero handle first to allow comparisons */
4676         memset(fh, 0, sizeof(*fh));
4677
4678         status = decode_op_hdr(xdr, OP_GETFH);
4679         if (status)
4680                 return status;
4681
4682         p = xdr_inline_decode(xdr, 4);
4683         if (unlikely(!p))
4684                 goto out_overflow;
4685         len = be32_to_cpup(p);
4686         if (len > NFS4_FHSIZE)
4687                 return -EIO;
4688         fh->size = len;
4689         p = xdr_inline_decode(xdr, len);
4690         if (unlikely(!p))
4691                 goto out_overflow;
4692         memcpy(fh->data, p, len);
4693         return 0;
4694 out_overflow:
4695         print_overflow_msg(__func__, xdr);
4696         return -EIO;
4697 }
4698
4699 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4700 {
4701         int status;
4702
4703         status = decode_op_hdr(xdr, OP_LINK);
4704         if (status)
4705                 return status;
4706         return decode_change_info(xdr, cinfo);
4707 }
4708
4709 /*
4710  * We create the owner, so we know a proper owner.id length is 4.
4711  */
4712 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4713 {
4714         uint64_t offset, length, clientid;
4715         __be32 *p;
4716         uint32_t namelen, type;
4717
4718         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4719         if (unlikely(!p))
4720                 goto out_overflow;
4721         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4722         p = xdr_decode_hyper(p, &length);
4723         type = be32_to_cpup(p++); /* 4 byte read */
4724         if (fl != NULL) { /* manipulate file lock */
4725                 fl->fl_start = (loff_t)offset;
4726                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4727                 if (length == ~(uint64_t)0)
4728                         fl->fl_end = OFFSET_MAX;
4729                 fl->fl_type = F_WRLCK;
4730                 if (type & 1)
4731                         fl->fl_type = F_RDLCK;
4732                 fl->fl_pid = 0;
4733         }
4734         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4735         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4736         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4737         if (likely(p))
4738                 return -NFS4ERR_DENIED;
4739 out_overflow:
4740         print_overflow_msg(__func__, xdr);
4741         return -EIO;
4742 }
4743
4744 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4745 {
4746         int status;
4747
4748         status = decode_op_hdr(xdr, OP_LOCK);
4749         if (status == -EIO)
4750                 goto out;
4751         if (status == 0) {
4752                 status = decode_stateid(xdr, &res->stateid);
4753                 if (unlikely(status))
4754                         goto out;
4755         } else if (status == -NFS4ERR_DENIED)
4756                 status = decode_lock_denied(xdr, NULL);
4757         if (res->open_seqid != NULL)
4758                 nfs_increment_open_seqid(status, res->open_seqid);
4759         nfs_increment_lock_seqid(status, res->lock_seqid);
4760 out:
4761         return status;
4762 }
4763
4764 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4765 {
4766         int status;
4767         status = decode_op_hdr(xdr, OP_LOCKT);
4768         if (status == -NFS4ERR_DENIED)
4769                 return decode_lock_denied(xdr, res->denied);
4770         return status;
4771 }
4772
4773 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4774 {
4775         int status;
4776
4777         status = decode_op_hdr(xdr, OP_LOCKU);
4778         if (status != -EIO)
4779                 nfs_increment_lock_seqid(status, res->seqid);
4780         if (status == 0)
4781                 status = decode_stateid(xdr, &res->stateid);
4782         return status;
4783 }
4784
4785 static int decode_release_lockowner(struct xdr_stream *xdr)
4786 {
4787         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4788 }
4789
4790 static int decode_lookup(struct xdr_stream *xdr)
4791 {
4792         return decode_op_hdr(xdr, OP_LOOKUP);
4793 }
4794
4795 /* This is too sick! */
4796 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4797 {
4798         __be32 *p;
4799         uint32_t limit_type, nblocks, blocksize;
4800
4801         p = xdr_inline_decode(xdr, 12);
4802         if (unlikely(!p))
4803                 goto out_overflow;
4804         limit_type = be32_to_cpup(p++);
4805         switch (limit_type) {
4806         case 1:
4807                 xdr_decode_hyper(p, maxsize);
4808                 break;
4809         case 2:
4810                 nblocks = be32_to_cpup(p++);
4811                 blocksize = be32_to_cpup(p);
4812                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4813         }
4814         return 0;
4815 out_overflow:
4816         print_overflow_msg(__func__, xdr);
4817         return -EIO;
4818 }
4819
4820 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4821 {
4822         __be32 *p;
4823         uint32_t delegation_type;
4824         int status;
4825
4826         p = xdr_inline_decode(xdr, 4);
4827         if (unlikely(!p))
4828                 goto out_overflow;
4829         delegation_type = be32_to_cpup(p);
4830         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4831                 res->delegation_type = 0;
4832                 return 0;
4833         }
4834         status = decode_stateid(xdr, &res->delegation);
4835         if (unlikely(status))
4836                 return status;
4837         p = xdr_inline_decode(xdr, 4);
4838         if (unlikely(!p))
4839                 goto out_overflow;
4840         res->do_recall = be32_to_cpup(p);
4841
4842         switch (delegation_type) {
4843         case NFS4_OPEN_DELEGATE_READ:
4844                 res->delegation_type = FMODE_READ;
4845                 break;
4846         case NFS4_OPEN_DELEGATE_WRITE:
4847                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4848                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4849                                 return -EIO;
4850         }
4851         return decode_ace(xdr, NULL, res->server->nfs_client);
4852 out_overflow:
4853         print_overflow_msg(__func__, xdr);
4854         return -EIO;
4855 }
4856
4857 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4858 {
4859         __be32 *p;
4860         uint32_t savewords, bmlen, i;
4861         int status;
4862
4863         status = decode_op_hdr(xdr, OP_OPEN);
4864         if (status != -EIO)
4865                 nfs_increment_open_seqid(status, res->seqid);
4866         if (!status)
4867                 status = decode_stateid(xdr, &res->stateid);
4868         if (unlikely(status))
4869                 return status;
4870
4871         decode_change_info(xdr, &res->cinfo);
4872
4873         p = xdr_inline_decode(xdr, 8);
4874         if (unlikely(!p))
4875                 goto out_overflow;
4876         res->rflags = be32_to_cpup(p++);
4877         bmlen = be32_to_cpup(p);
4878         if (bmlen > 10)
4879                 goto xdr_error;
4880
4881         p = xdr_inline_decode(xdr, bmlen << 2);
4882         if (unlikely(!p))
4883                 goto out_overflow;
4884         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4885         for (i = 0; i < savewords; ++i)
4886                 res->attrset[i] = be32_to_cpup(p++);
4887         for (; i < NFS4_BITMAP_SIZE; i++)
4888                 res->attrset[i] = 0;
4889
4890         return decode_delegation(xdr, res);
4891 xdr_error:
4892         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4893         return -EIO;
4894 out_overflow:
4895         print_overflow_msg(__func__, xdr);
4896         return -EIO;
4897 }
4898
4899 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4900 {
4901         int status;
4902
4903         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4904         if (status != -EIO)
4905                 nfs_increment_open_seqid(status, res->seqid);
4906         if (!status)
4907                 status = decode_stateid(xdr, &res->stateid);
4908         return status;
4909 }
4910
4911 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4912 {
4913         int status;
4914
4915         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4916         if (status != -EIO)
4917                 nfs_increment_open_seqid(status, res->seqid);
4918         if (!status)
4919                 status = decode_stateid(xdr, &res->stateid);
4920         return status;
4921 }
4922
4923 static int decode_putfh(struct xdr_stream *xdr)
4924 {
4925         return decode_op_hdr(xdr, OP_PUTFH);
4926 }
4927
4928 static int decode_putrootfh(struct xdr_stream *xdr)
4929 {
4930         return decode_op_hdr(xdr, OP_PUTROOTFH);
4931 }
4932
4933 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4934 {
4935         __be32 *p;
4936         uint32_t count, eof, recvd;
4937         int status;
4938
4939         status = decode_op_hdr(xdr, OP_READ);
4940         if (status)
4941                 return status;
4942         p = xdr_inline_decode(xdr, 8);
4943         if (unlikely(!p))
4944                 goto out_overflow;
4945         eof = be32_to_cpup(p++);
4946         count = be32_to_cpup(p);
4947         recvd = xdr_read_pages(xdr, count);
4948         if (count > recvd) {
4949                 dprintk("NFS: server cheating in read reply: "
4950                                 "count %u > recvd %u\n", count, recvd);
4951                 count = recvd;
4952                 eof = 0;
4953         }
4954         res->eof = eof;
4955         res->count = count;
4956         return 0;
4957 out_overflow:
4958         print_overflow_msg(__func__, xdr);
4959         return -EIO;
4960 }
4961
4962 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4963 {
4964         int             status;
4965         __be32          verf[2];
4966
4967         status = decode_op_hdr(xdr, OP_READDIR);
4968         if (!status)
4969                 status = decode_verifier(xdr, readdir->verifier.data);
4970         if (unlikely(status))
4971                 return status;
4972         memcpy(verf, readdir->verifier.data, sizeof(verf));
4973         dprintk("%s: verifier = %08x:%08x\n",
4974                         __func__, verf[0], verf[1]);
4975         return xdr_read_pages(xdr, xdr->buf->page_len);
4976 }
4977
4978 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4979 {
4980         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4981         u32 len, recvd;
4982         __be32 *p;
4983         int status;
4984
4985         status = decode_op_hdr(xdr, OP_READLINK);
4986         if (status)
4987                 return status;
4988
4989         /* Convert length of symlink */
4990         p = xdr_inline_decode(xdr, 4);
4991         if (unlikely(!p))
4992                 goto out_overflow;
4993         len = be32_to_cpup(p);
4994         if (len >= rcvbuf->page_len || len <= 0) {
4995                 dprintk("nfs: server returned giant symlink!\n");
4996                 return -ENAMETOOLONG;
4997         }
4998         recvd = xdr_read_pages(xdr, len);
4999         if (recvd < len) {
5000                 dprintk("NFS: server cheating in readlink reply: "
5001                                 "count %u > recvd %u\n", len, recvd);
5002                 return -EIO;
5003         }
5004         /*
5005          * The XDR encode routine has set things up so that
5006          * the link text will be copied directly into the
5007          * buffer.  We just have to do overflow-checking,
5008          * and and null-terminate the text (the VFS expects
5009          * null-termination).
5010          */
5011         xdr_terminate_string(rcvbuf, len);
5012         return 0;
5013 out_overflow:
5014         print_overflow_msg(__func__, xdr);
5015         return -EIO;
5016 }
5017
5018 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5019 {
5020         int status;
5021
5022         status = decode_op_hdr(xdr, OP_REMOVE);
5023         if (status)
5024                 goto out;
5025         status = decode_change_info(xdr, cinfo);
5026 out:
5027         return status;
5028 }
5029
5030 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5031               struct nfs4_change_info *new_cinfo)
5032 {
5033         int status;
5034
5035         status = decode_op_hdr(xdr, OP_RENAME);
5036         if (status)
5037                 goto out;
5038         if ((status = decode_change_info(xdr, old_cinfo)))
5039                 goto out;
5040         status = decode_change_info(xdr, new_cinfo);
5041 out:
5042         return status;
5043 }
5044
5045 static int decode_renew(struct xdr_stream *xdr)
5046 {
5047         return decode_op_hdr(xdr, OP_RENEW);
5048 }
5049
5050 static int
5051 decode_restorefh(struct xdr_stream *xdr)
5052 {
5053         return decode_op_hdr(xdr, OP_RESTOREFH);
5054 }
5055
5056 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5057                          struct nfs_getaclres *res)
5058 {
5059         unsigned int savep;
5060         uint32_t attrlen,
5061                  bitmap[3] = {0};
5062         int status;
5063         unsigned int pg_offset;
5064
5065         res->acl_len = 0;
5066         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5067                 goto out;
5068
5069         xdr_enter_page(xdr, xdr->buf->page_len);
5070
5071         /* Calculate the offset of the page data */
5072         pg_offset = xdr->buf->head[0].iov_len;
5073
5074         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5075                 goto out;
5076         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5077                 goto out;
5078
5079         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5080                 return -EIO;
5081         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5082
5083                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5084                  * are stored with the acl data to handle the problem of
5085                  * variable length bitmaps.*/
5086                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5087                 res->acl_len = attrlen;
5088
5089                 /* Check for receive buffer overflow */
5090                 if (res->acl_len > (xdr->nwords << 2) ||
5091                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5092                         res->acl_flags |= NFS4_ACL_TRUNC;
5093                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5094                                         attrlen, xdr->nwords << 2);
5095                 }
5096         } else
5097                 status = -EOPNOTSUPP;
5098
5099 out:
5100         return status;
5101 }
5102
5103 static int
5104 decode_savefh(struct xdr_stream *xdr)
5105 {
5106         return decode_op_hdr(xdr, OP_SAVEFH);
5107 }
5108
5109 static int decode_setattr(struct xdr_stream *xdr)
5110 {
5111         __be32 *p;
5112         uint32_t bmlen;
5113         int status;
5114
5115         status = decode_op_hdr(xdr, OP_SETATTR);
5116         if (status)
5117                 return status;
5118         p = xdr_inline_decode(xdr, 4);
5119         if (unlikely(!p))
5120                 goto out_overflow;
5121         bmlen = be32_to_cpup(p);
5122         p = xdr_inline_decode(xdr, bmlen << 2);
5123         if (likely(p))
5124                 return 0;
5125 out_overflow:
5126         print_overflow_msg(__func__, xdr);
5127         return -EIO;
5128 }
5129
5130 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5131 {
5132         __be32 *p;
5133         uint32_t opnum;
5134         int32_t nfserr;
5135
5136         p = xdr_inline_decode(xdr, 8);
5137         if (unlikely(!p))
5138                 goto out_overflow;
5139         opnum = be32_to_cpup(p++);
5140         if (opnum != OP_SETCLIENTID) {
5141                 dprintk("nfs: decode_setclientid: Server returned operation"
5142                         " %d\n", opnum);
5143                 return -EIO;
5144         }
5145         nfserr = be32_to_cpup(p);
5146         if (nfserr == NFS_OK) {
5147                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5148                 if (unlikely(!p))
5149                         goto out_overflow;
5150                 p = xdr_decode_hyper(p, &res->clientid);
5151                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5152         } else if (nfserr == NFSERR_CLID_INUSE) {
5153                 uint32_t len;
5154
5155                 /* skip netid string */
5156                 p = xdr_inline_decode(xdr, 4);
5157                 if (unlikely(!p))
5158                         goto out_overflow;
5159                 len = be32_to_cpup(p);
5160                 p = xdr_inline_decode(xdr, len);
5161                 if (unlikely(!p))
5162                         goto out_overflow;
5163
5164                 /* skip uaddr string */
5165                 p = xdr_inline_decode(xdr, 4);
5166                 if (unlikely(!p))
5167                         goto out_overflow;
5168                 len = be32_to_cpup(p);
5169                 p = xdr_inline_decode(xdr, len);
5170                 if (unlikely(!p))
5171                         goto out_overflow;
5172                 return -NFSERR_CLID_INUSE;
5173         } else
5174                 return nfs4_stat_to_errno(nfserr);
5175
5176         return 0;
5177 out_overflow:
5178         print_overflow_msg(__func__, xdr);
5179         return -EIO;
5180 }
5181
5182 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5183 {
5184         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5185 }
5186
5187 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
5188 {
5189         __be32 *p;
5190         int status;
5191
5192         status = decode_op_hdr(xdr, OP_WRITE);
5193         if (status)
5194                 return status;
5195
5196         p = xdr_inline_decode(xdr, 8);
5197         if (unlikely(!p))
5198                 goto out_overflow;
5199         res->count = be32_to_cpup(p++);
5200         res->verf->committed = be32_to_cpup(p++);
5201         return decode_write_verifier(xdr, &res->verf->verifier);
5202 out_overflow:
5203         print_overflow_msg(__func__, xdr);
5204         return -EIO;
5205 }
5206
5207 static int decode_delegreturn(struct xdr_stream *xdr)
5208 {
5209         return decode_op_hdr(xdr, OP_DELEGRETURN);
5210 }
5211
5212 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
5213 {
5214         __be32 *p;
5215
5216         p = xdr_inline_decode(xdr, 4);
5217         if (unlikely(!p))
5218                 goto out_overflow;
5219         flavor->gss.sec_oid4.len = be32_to_cpup(p);
5220         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
5221                 goto out_err;
5222
5223         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
5224         if (unlikely(!p))
5225                 goto out_overflow;
5226         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
5227
5228         p = xdr_inline_decode(xdr, 8);
5229         if (unlikely(!p))
5230                 goto out_overflow;
5231         flavor->gss.qop4 = be32_to_cpup(p++);
5232         flavor->gss.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_secinfo_flavor *sec_flavor;
5246         int status;
5247         __be32 *p;
5248         int i, num_flavors;
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                                             struct nfs_fsinfo *fsinfo)
6653 {
6654         struct compound_hdr hdr;
6655         int status;
6656
6657         status = decode_compound_hdr(xdr, &hdr);
6658         if (!status)
6659                 status = decode_setclientid_confirm(xdr);
6660         if (!status)
6661                 status = decode_putrootfh(xdr);
6662         if (!status)
6663                 status = decode_fsinfo(xdr, fsinfo);
6664         return status;
6665 }
6666
6667 /*
6668  * Decode DELEGRETURN response
6669  */
6670 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6671                                     struct xdr_stream *xdr,
6672                                     struct nfs4_delegreturnres *res)
6673 {
6674         struct compound_hdr hdr;
6675         int status;
6676
6677         status = decode_compound_hdr(xdr, &hdr);
6678         if (status)
6679                 goto out;
6680         status = decode_sequence(xdr, &res->seq_res, rqstp);
6681         if (status)
6682                 goto out;
6683         status = decode_putfh(xdr);
6684         if (status != 0)
6685                 goto out;
6686         status = decode_getfattr(xdr, res->fattr, res->server);
6687         if (status != 0)
6688                 goto out;
6689         status = decode_delegreturn(xdr);
6690 out:
6691         return status;
6692 }
6693
6694 /*
6695  * Decode FS_LOCATIONS response
6696  */
6697 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6698                                      struct xdr_stream *xdr,
6699                                      struct nfs4_fs_locations_res *res)
6700 {
6701         struct compound_hdr hdr;
6702         int status;
6703
6704         status = decode_compound_hdr(xdr, &hdr);
6705         if (status)
6706                 goto out;
6707         status = decode_sequence(xdr, &res->seq_res, req);
6708         if (status)
6709                 goto out;
6710         status = decode_putfh(xdr);
6711         if (status)
6712                 goto out;
6713         status = decode_lookup(xdr);
6714         if (status)
6715                 goto out;
6716         xdr_enter_page(xdr, PAGE_SIZE);
6717         status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
6718                                          NULL, res->fs_locations,
6719                                          res->fs_locations->server);
6720 out:
6721         return status;
6722 }
6723
6724 /*
6725  * Decode SECINFO response
6726  */
6727 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6728                                 struct xdr_stream *xdr,
6729                                 struct nfs4_secinfo_res *res)
6730 {
6731         struct compound_hdr hdr;
6732         int status;
6733
6734         status = decode_compound_hdr(xdr, &hdr);
6735         if (status)
6736                 goto out;
6737         status = decode_sequence(xdr, &res->seq_res, rqstp);
6738         if (status)
6739                 goto out;
6740         status = decode_putfh(xdr);
6741         if (status)
6742                 goto out;
6743         status = decode_secinfo(xdr, res);
6744 out:
6745         return status;
6746 }
6747
6748 #if defined(CONFIG_NFS_V4_1)
6749 /*
6750  * Decode BIND_CONN_TO_SESSION response
6751  */
6752 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6753                                         struct xdr_stream *xdr,
6754                                         void *res)
6755 {
6756         struct compound_hdr hdr;
6757         int status;
6758
6759         status = decode_compound_hdr(xdr, &hdr);
6760         if (!status)
6761                 status = decode_bind_conn_to_session(xdr, res);
6762         return status;
6763 }
6764
6765 /*
6766  * Decode EXCHANGE_ID response
6767  */
6768 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6769                                     struct xdr_stream *xdr,
6770                                     void *res)
6771 {
6772         struct compound_hdr hdr;
6773         int status;
6774
6775         status = decode_compound_hdr(xdr, &hdr);
6776         if (!status)
6777                 status = decode_exchange_id(xdr, res);
6778         return status;
6779 }
6780
6781 /*
6782  * Decode CREATE_SESSION response
6783  */
6784 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6785                                        struct xdr_stream *xdr,
6786                                        struct nfs41_create_session_res *res)
6787 {
6788         struct compound_hdr hdr;
6789         int status;
6790
6791         status = decode_compound_hdr(xdr, &hdr);
6792         if (!status)
6793                 status = decode_create_session(xdr, res);
6794         return status;
6795 }
6796
6797 /*
6798  * Decode DESTROY_SESSION response
6799  */
6800 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6801                                         struct xdr_stream *xdr,
6802                                         void *res)
6803 {
6804         struct compound_hdr hdr;
6805         int status;
6806
6807         status = decode_compound_hdr(xdr, &hdr);
6808         if (!status)
6809                 status = decode_destroy_session(xdr, res);
6810         return status;
6811 }
6812
6813 /*
6814  * Decode DESTROY_CLIENTID response
6815  */
6816 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6817                                         struct xdr_stream *xdr,
6818                                         void *res)
6819 {
6820         struct compound_hdr hdr;
6821         int status;
6822
6823         status = decode_compound_hdr(xdr, &hdr);
6824         if (!status)
6825                 status = decode_destroy_clientid(xdr, res);
6826         return status;
6827 }
6828
6829 /*
6830  * Decode SEQUENCE response
6831  */
6832 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6833                                  struct xdr_stream *xdr,
6834                                  struct nfs4_sequence_res *res)
6835 {
6836         struct compound_hdr hdr;
6837         int status;
6838
6839         status = decode_compound_hdr(xdr, &hdr);
6840         if (!status)
6841                 status = decode_sequence(xdr, res, rqstp);
6842         return status;
6843 }
6844
6845 /*
6846  * Decode GET_LEASE_TIME response
6847  */
6848 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6849                                        struct xdr_stream *xdr,
6850                                        struct nfs4_get_lease_time_res *res)
6851 {
6852         struct compound_hdr hdr;
6853         int status;
6854
6855         status = decode_compound_hdr(xdr, &hdr);
6856         if (!status)
6857                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6858         if (!status)
6859                 status = decode_putrootfh(xdr);
6860         if (!status)
6861                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6862         return status;
6863 }
6864
6865 /*
6866  * Decode RECLAIM_COMPLETE response
6867  */
6868 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6869                                          struct xdr_stream *xdr,
6870                                          struct nfs41_reclaim_complete_res *res)
6871 {
6872         struct compound_hdr hdr;
6873         int status;
6874
6875         status = decode_compound_hdr(xdr, &hdr);
6876         if (!status)
6877                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6878         if (!status)
6879                 status = decode_reclaim_complete(xdr, (void *)NULL);
6880         return status;
6881 }
6882
6883 /*
6884  * Decode GETDEVICELIST response
6885  */
6886 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
6887                                       struct xdr_stream *xdr,
6888                                       struct nfs4_getdevicelist_res *res)
6889 {
6890         struct compound_hdr hdr;
6891         int status;
6892
6893         dprintk("encoding getdevicelist!\n");
6894
6895         status = decode_compound_hdr(xdr, &hdr);
6896         if (status != 0)
6897                 goto out;
6898         status = decode_sequence(xdr, &res->seq_res, rqstp);
6899         if (status != 0)
6900                 goto out;
6901         status = decode_putfh(xdr);
6902         if (status != 0)
6903                 goto out;
6904         status = decode_getdevicelist(xdr, res->devlist);
6905 out:
6906         return status;
6907 }
6908
6909 /*
6910  * Decode GETDEVINFO response
6911  */
6912 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6913                                       struct xdr_stream *xdr,
6914                                       struct nfs4_getdeviceinfo_res *res)
6915 {
6916         struct compound_hdr hdr;
6917         int status;
6918
6919         status = decode_compound_hdr(xdr, &hdr);
6920         if (status != 0)
6921                 goto out;
6922         status = decode_sequence(xdr, &res->seq_res, rqstp);
6923         if (status != 0)
6924                 goto out;
6925         status = decode_getdeviceinfo(xdr, res->pdev);
6926 out:
6927         return status;
6928 }
6929
6930 /*
6931  * Decode LAYOUTGET response
6932  */
6933 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6934                                   struct xdr_stream *xdr,
6935                                   struct nfs4_layoutget_res *res)
6936 {
6937         struct compound_hdr hdr;
6938         int status;
6939
6940         status = decode_compound_hdr(xdr, &hdr);
6941         if (status)
6942                 goto out;
6943         status = decode_sequence(xdr, &res->seq_res, rqstp);
6944         if (status)
6945                 goto out;
6946         status = decode_putfh(xdr);
6947         if (status)
6948                 goto out;
6949         status = decode_layoutget(xdr, rqstp, res);
6950 out:
6951         return status;
6952 }
6953
6954 /*
6955  * Decode LAYOUTRETURN response
6956  */
6957 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
6958                                      struct xdr_stream *xdr,
6959                                      struct nfs4_layoutreturn_res *res)
6960 {
6961         struct compound_hdr hdr;
6962         int status;
6963
6964         status = decode_compound_hdr(xdr, &hdr);
6965         if (status)
6966                 goto out;
6967         status = decode_sequence(xdr, &res->seq_res, rqstp);
6968         if (status)
6969                 goto out;
6970         status = decode_putfh(xdr);
6971         if (status)
6972                 goto out;
6973         status = decode_layoutreturn(xdr, res);
6974 out:
6975         return status;
6976 }
6977
6978 /*
6979  * Decode LAYOUTCOMMIT response
6980  */
6981 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6982                                      struct xdr_stream *xdr,
6983                                      struct nfs4_layoutcommit_res *res)
6984 {
6985         struct compound_hdr hdr;
6986         int status;
6987
6988         status = decode_compound_hdr(xdr, &hdr);
6989         if (status)
6990                 goto out;
6991         status = decode_sequence(xdr, &res->seq_res, rqstp);
6992         if (status)
6993                 goto out;
6994         status = decode_putfh(xdr);
6995         if (status)
6996                 goto out;
6997         status = decode_layoutcommit(xdr, rqstp, res);
6998         if (status)
6999                 goto out;
7000         decode_getfattr(xdr, res->fattr, res->server);
7001 out:
7002         return status;
7003 }
7004
7005 /*
7006  * Decode SECINFO_NO_NAME response
7007  */
7008 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7009                                         struct xdr_stream *xdr,
7010                                         struct nfs4_secinfo_res *res)
7011 {
7012         struct compound_hdr hdr;
7013         int status;
7014
7015         status = decode_compound_hdr(xdr, &hdr);
7016         if (status)
7017                 goto out;
7018         status = decode_sequence(xdr, &res->seq_res, rqstp);
7019         if (status)
7020                 goto out;
7021         status = decode_putrootfh(xdr);
7022         if (status)
7023                 goto out;
7024         status = decode_secinfo_no_name(xdr, res);
7025 out:
7026         return status;
7027 }
7028
7029 /*
7030  * Decode TEST_STATEID response
7031  */
7032 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7033                                      struct xdr_stream *xdr,
7034                                      struct nfs41_test_stateid_res *res)
7035 {
7036         struct compound_hdr hdr;
7037         int status;
7038
7039         status = decode_compound_hdr(xdr, &hdr);
7040         if (status)
7041                 goto out;
7042         status = decode_sequence(xdr, &res->seq_res, rqstp);
7043         if (status)
7044                 goto out;
7045         status = decode_test_stateid(xdr, res);
7046 out:
7047         return status;
7048 }
7049
7050 /*
7051  * Decode FREE_STATEID response
7052  */
7053 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7054                                      struct xdr_stream *xdr,
7055                                      struct nfs41_free_stateid_res *res)
7056 {
7057         struct compound_hdr hdr;
7058         int status;
7059
7060         status = decode_compound_hdr(xdr, &hdr);
7061         if (status)
7062                 goto out;
7063         status = decode_sequence(xdr, &res->seq_res, rqstp);
7064         if (status)
7065                 goto out;
7066         status = decode_free_stateid(xdr, res);
7067 out:
7068         return status;
7069 }
7070 #endif /* CONFIG_NFS_V4_1 */
7071
7072 /**
7073  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7074  *                      the local page cache.
7075  * @xdr: XDR stream where entry resides
7076  * @entry: buffer to fill in with entry data
7077  * @plus: boolean indicating whether this should be a readdirplus entry
7078  *
7079  * Returns zero if successful, otherwise a negative errno value is
7080  * returned.
7081  *
7082  * This function is not invoked during READDIR reply decoding, but
7083  * rather whenever an application invokes the getdents(2) system call
7084  * on a directory already in our cache.
7085  */
7086 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7087                        int plus)
7088 {
7089         unsigned int savep;
7090         uint32_t bitmap[3] = {0};
7091         uint32_t len;
7092         __be32 *p = xdr_inline_decode(xdr, 4);
7093         if (unlikely(!p))
7094                 goto out_overflow;
7095         if (*p == xdr_zero) {
7096                 p = xdr_inline_decode(xdr, 4);
7097                 if (unlikely(!p))
7098                         goto out_overflow;
7099                 if (*p == xdr_zero)
7100                         return -EAGAIN;
7101                 entry->eof = 1;
7102                 return -EBADCOOKIE;
7103         }
7104
7105         p = xdr_inline_decode(xdr, 12);
7106         if (unlikely(!p))
7107                 goto out_overflow;
7108         entry->prev_cookie = entry->cookie;
7109         p = xdr_decode_hyper(p, &entry->cookie);
7110         entry->len = be32_to_cpup(p);
7111
7112         p = xdr_inline_decode(xdr, entry->len);
7113         if (unlikely(!p))
7114                 goto out_overflow;
7115         entry->name = (const char *) p;
7116
7117         /*
7118          * In case the server doesn't return an inode number,
7119          * we fake one here.  (We don't use inode number 0,
7120          * since glibc seems to choke on it...)
7121          */
7122         entry->ino = 1;
7123         entry->fattr->valid = 0;
7124
7125         if (decode_attr_bitmap(xdr, bitmap) < 0)
7126                 goto out_overflow;
7127
7128         if (decode_attr_length(xdr, &len, &savep) < 0)
7129                 goto out_overflow;
7130
7131         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7132                                   NULL, entry->server) < 0)
7133                 goto out_overflow;
7134         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7135                 entry->ino = entry->fattr->mounted_on_fileid;
7136         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7137                 entry->ino = entry->fattr->fileid;
7138
7139         entry->d_type = DT_UNKNOWN;
7140         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7141                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7142
7143         return 0;
7144
7145 out_overflow:
7146         print_overflow_msg(__func__, xdr);
7147         return -EAGAIN;
7148 }
7149
7150 /*
7151  * We need to translate between nfs status return values and
7152  * the local errno values which may not be the same.
7153  */
7154 static struct {
7155         int stat;
7156         int errno;
7157 } nfs_errtbl[] = {
7158         { NFS4_OK,              0               },
7159         { NFS4ERR_PERM,         -EPERM          },
7160         { NFS4ERR_NOENT,        -ENOENT         },
7161         { NFS4ERR_IO,           -errno_NFSERR_IO},
7162         { NFS4ERR_NXIO,         -ENXIO          },
7163         { NFS4ERR_ACCESS,       -EACCES         },
7164         { NFS4ERR_EXIST,        -EEXIST         },
7165         { NFS4ERR_XDEV,         -EXDEV          },
7166         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7167         { NFS4ERR_ISDIR,        -EISDIR         },
7168         { NFS4ERR_INVAL,        -EINVAL         },
7169         { NFS4ERR_FBIG,         -EFBIG          },
7170         { NFS4ERR_NOSPC,        -ENOSPC         },
7171         { NFS4ERR_ROFS,         -EROFS          },
7172         { NFS4ERR_MLINK,        -EMLINK         },
7173         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7174         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7175         { NFS4ERR_DQUOT,        -EDQUOT         },
7176         { NFS4ERR_STALE,        -ESTALE         },
7177         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7178         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7179         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7180         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7181         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7182         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7183         { NFS4ERR_LOCKED,       -EAGAIN         },
7184         { NFS4ERR_SYMLINK,      -ELOOP          },
7185         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7186         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7187         { -1,                   -EIO            }
7188 };
7189
7190 /*
7191  * Convert an NFS error code to a local one.
7192  * This one is used jointly by NFSv2 and NFSv3.
7193  */
7194 static int
7195 nfs4_stat_to_errno(int stat)
7196 {
7197         int i;
7198         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7199                 if (nfs_errtbl[i].stat == stat)
7200                         return nfs_errtbl[i].errno;
7201         }
7202         if (stat <= 10000 || stat > 10100) {
7203                 /* The server is looney tunes. */
7204                 return -EREMOTEIO;
7205         }
7206         /* If we cannot translate the error, the recovery routines should
7207          * handle it.
7208          * Note: remaining NFSv4 error codes have values > 10000, so should
7209          * not conflict with native Linux error codes.
7210          */
7211         return -stat;
7212 }
7213
7214 #define PROC(proc, argtype, restype)                            \
7215 [NFSPROC4_CLNT_##proc] = {                                      \
7216         .p_proc   = NFSPROC4_COMPOUND,                          \
7217         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7218         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7219         .p_arglen = NFS4_##argtype##_sz,                        \
7220         .p_replen = NFS4_##restype##_sz,                        \
7221         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7222         .p_name   = #proc,                                      \
7223 }
7224
7225 struct rpc_procinfo     nfs4_procedures[] = {
7226         PROC(READ,              enc_read,               dec_read),
7227         PROC(WRITE,             enc_write,              dec_write),
7228         PROC(COMMIT,            enc_commit,             dec_commit),
7229         PROC(OPEN,              enc_open,               dec_open),
7230         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7231         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7232         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7233         PROC(CLOSE,             enc_close,              dec_close),
7234         PROC(SETATTR,           enc_setattr,            dec_setattr),
7235         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7236         PROC(RENEW,             enc_renew,              dec_renew),
7237         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7238         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7239         PROC(LOCK,              enc_lock,               dec_lock),
7240         PROC(LOCKT,             enc_lockt,              dec_lockt),
7241         PROC(LOCKU,             enc_locku,              dec_locku),
7242         PROC(ACCESS,            enc_access,             dec_access),
7243         PROC(GETATTR,           enc_getattr,            dec_getattr),
7244         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7245         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7246         PROC(REMOVE,            enc_remove,             dec_remove),
7247         PROC(RENAME,            enc_rename,             dec_rename),
7248         PROC(LINK,              enc_link,               dec_link),
7249         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7250         PROC(CREATE,            enc_create,             dec_create),
7251         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7252         PROC(STATFS,            enc_statfs,             dec_statfs),
7253         PROC(READLINK,          enc_readlink,           dec_readlink),
7254         PROC(READDIR,           enc_readdir,            dec_readdir),
7255         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7256         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7257         PROC(GETACL,            enc_getacl,             dec_getacl),
7258         PROC(SETACL,            enc_setacl,             dec_setacl),
7259         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7260         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7261         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7262 #if defined(CONFIG_NFS_V4_1)
7263         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7264         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7265         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7266         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7267         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7268         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7269         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7270         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7271         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7272         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7273         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7274         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7275         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7276         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7277         PROC(BIND_CONN_TO_SESSION,
7278                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7279         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7280 #endif /* CONFIG_NFS_V4_1 */
7281 };
7282
7283 const struct rpc_version nfs_version4 = {
7284         .number                 = 4,
7285         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7286         .procs                  = nfs4_procedures
7287 };
7288
7289 /*
7290  * Local variables:
7291  *  c-basic-offset: 8
7292  * End:
7293  */