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 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108 #else
 109 #define nfs4_label_maxsz        0
 110 #endif
 111 /* We support only one layout type per file system */
 112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 113 /* This is based on getfattr, which uses the most attributes: */
 114 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 115                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 116                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 117                                  decode_mdsthreshold_maxsz))
 118 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 119                                 nfs4_fattr_value_maxsz)
 120 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 121 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 122                                  1 + 2 + 1 + \
 123                                 nfs4_owner_maxsz + \
 124                                 nfs4_group_maxsz + \
 125                                 nfs4_label_maxsz + \
 126                                 4 + 4)
 127 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 128 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 129 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 130 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 131 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 133  * layout types will be returned.
 134  */
 135 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 136                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 137 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 138 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 139 #define encode_setclientid_maxsz \
 140                                 (op_encode_hdr_maxsz + \
 141                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 142                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 143                                 1 /* sc_prog */ + \
 144                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 145                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 146                                 1) /* sc_cb_ident */
 147 #define decode_setclientid_maxsz \
 148                                 (op_decode_hdr_maxsz + \
 149                                 2 + \
 150                                 1024) /* large value for CLID_INUSE */
 151 #define encode_setclientid_confirm_maxsz \
 152                                 (op_encode_hdr_maxsz + \
 153                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 154 #define decode_setclientid_confirm_maxsz \
 155                                 (op_decode_hdr_maxsz)
 156 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 157 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 158 #define encode_share_access_maxsz \
 159                                 (2)
 160 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 161 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 162 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 163 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 164                                 2 + encode_share_access_maxsz + 2 + \
 165                                 open_owner_id_maxsz + \
 166                                 encode_opentype_maxsz + \
 167                                 encode_claim_null_maxsz)
 168 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 169 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 170                                 decode_ace_maxsz)
 171 #define decode_change_info_maxsz        (5)
 172 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 173                                 decode_stateid_maxsz + \
 174                                 decode_change_info_maxsz + 1 + \
 175                                 nfs4_fattr_bitmap_maxsz + \
 176                                 decode_delegation_maxsz)
 177 #define encode_open_confirm_maxsz \
 178                                 (op_encode_hdr_maxsz + \
 179                                  encode_stateid_maxsz + 1)
 180 #define decode_open_confirm_maxsz \
 181                                 (op_decode_hdr_maxsz + \
 182                                  decode_stateid_maxsz)
 183 #define encode_open_downgrade_maxsz \
 184                                 (op_encode_hdr_maxsz + \
 185                                  encode_stateid_maxsz + 1 + \
 186                                  encode_share_access_maxsz)
 187 #define decode_open_downgrade_maxsz \
 188                                 (op_decode_hdr_maxsz + \
 189                                  decode_stateid_maxsz)
 190 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 191                                  1 + encode_stateid_maxsz)
 192 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 193                                  decode_stateid_maxsz)
 194 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 195                                  encode_stateid_maxsz + \
 196                                  encode_attrs_maxsz)
 197 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 198                                  nfs4_fattr_bitmap_maxsz)
 199 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 200                                  encode_stateid_maxsz + 3)
 201 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 202 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 203                                  2 + encode_verifier_maxsz + 5 + \
 204                                 nfs4_label_maxsz)
 205 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 206                                  decode_verifier_maxsz)
 207 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 208 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 209 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 210                                  encode_stateid_maxsz + 4)
 211 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 212                                  2 + decode_verifier_maxsz)
 213 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 214 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 215                                  decode_verifier_maxsz)
 216 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 217                                 nfs4_name_maxsz)
 218 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 219                                  decode_change_info_maxsz)
 220 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 221                                 2 * nfs4_name_maxsz)
 222 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 223                                  decode_change_info_maxsz + \
 224                                  decode_change_info_maxsz)
 225 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 226                                 nfs4_name_maxsz)
 227 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 228 #define encode_lockowner_maxsz  (7)
 229 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 230                                  7 + \
 231                                  1 + encode_stateid_maxsz + 1 + \
 232                                  encode_lockowner_maxsz)
 233 #define decode_lock_denied_maxsz \
 234                                 (8 + decode_lockowner_maxsz)
 235 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 236                                  decode_lock_denied_maxsz)
 237 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 238                                 encode_lockowner_maxsz)
 239 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 240                                  decode_lock_denied_maxsz)
 241 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 242                                  encode_stateid_maxsz + \
 243                                  4)
 244 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 245                                  decode_stateid_maxsz)
 246 #define encode_release_lockowner_maxsz \
 247                                 (op_encode_hdr_maxsz + \
 248                                  encode_lockowner_maxsz)
 249 #define decode_release_lockowner_maxsz \
 250                                 (op_decode_hdr_maxsz)
 251 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 252 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 253 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 254                                 1 + nfs4_name_maxsz + \
 255                                 1 + \
 256                                 nfs4_fattr_maxsz)
 257 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 258 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 259                                 1 + 2 + nfs4_name_maxsz + \
 260                                 encode_attrs_maxsz)
 261 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 262                                 decode_change_info_maxsz + \
 263                                 nfs4_fattr_bitmap_maxsz)
 264 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 265 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 266 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 267 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 268 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 269 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 270                                  nfs4_fattr_bitmap_maxsz + 1)
 271 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 272                                  encode_stateid_maxsz + 3)
 273 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 274 #define encode_fs_locations_maxsz \
 275                                 (encode_getattr_maxsz)
 276 #define decode_fs_locations_maxsz \
 277                                 (0)
 278 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 279 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 280
 281 #if defined(CONFIG_NFS_V4_1)
 282 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 283 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 284                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 285
 286 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 287                                 encode_verifier_maxsz + \
 288                                 1 /* co_ownerid.len */ + \
 289                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 290                                 1 /* flags */ + \
 291                                 1 /* spa_how */ + \
 292                                 /* max is SP4_MACH_CRED (for now) */ + \
 293                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 294                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 295                                 1 /* implementation id array of size 1 */ + \
 296                                 1 /* nii_domain */ + \
 297                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 298                                 1 /* nii_name */ + \
 299                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 300                                 3 /* nii_date */)
 301 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 302                                 2 /* eir_clientid */ + \
 303                                 1 /* eir_sequenceid */ + \
 304                                 1 /* eir_flags */ + \
 305                                 1 /* spr_how */ + \
 306                                   /* max is SP4_MACH_CRED (for now) */ + \
 307                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 308                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 309                                 2 /* eir_server_owner.so_minor_id */ + \
 310                                 /* eir_server_owner.so_major_id<> */ \
 311                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 312                                 /* eir_server_scope<> */ \
 313                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 314                                 1 /* eir_server_impl_id array length */ + \
 315                                 1 /* nii_domain */ + \
 316                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 317                                 1 /* nii_name */ + \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 319                                 3 /* nii_date */)
 320 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 321 #define decode_channel_attrs_maxsz  (6 + \
 322                                      1 /* ca_rdma_ird.len */ + \
 323                                      1 /* ca_rdma_ird */)
 324 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 325                                      2 /* csa_clientid */ + \
 326                                      1 /* csa_sequence */ + \
 327                                      1 /* csa_flags */ + \
 328                                      encode_channel_attrs_maxsz + \
 329                                      encode_channel_attrs_maxsz + \
 330                                      1 /* csa_cb_program */ + \
 331                                      1 /* csa_sec_parms.len (1) */ + \
 332                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 333                                      1 /* stamp */ + \
 334                                      1 /* machinename.len */ + \
 335                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 336                                      1 /* uid */ + \
 337                                      1 /* gid */ + \
 338                                      1 /* gids.len (0) */)
 339 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 340                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 341                                      1 /* csr_sequence */ + \
 342                                      1 /* csr_flags */ + \
 343                                      decode_channel_attrs_maxsz + \
 344                                      decode_channel_attrs_maxsz)
 345 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 346                                      /* bctsa_sessid */ \
 347                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 348                                      1 /* bctsa_dir */ + \
 349                                      1 /* bctsa_use_conn_in_rdma_mode */)
 350 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 351                                      /* bctsr_sessid */ \
 352                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 353                                      1 /* bctsr_dir */ + \
 354                                      1 /* bctsr_use_conn_in_rdma_mode */)
 355 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 356 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 357 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 358 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 359 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 360                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 361 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 362                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 363 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 364 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 365 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 366                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 367                                 1 /* layout type */ + \
 368                                 1 /* maxcount */ + \
 369                                 1 /* bitmap size */ + \
 370                                 1 /* notification bitmap length */ + \
 371                                 1 /* notification bitmap, word 0 */)
 372 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 373                                 1 /* layout type */ + \
 374                                 1 /* opaque devaddr4 length */ + \
 375                                   /* devaddr4 payload is read into page */ \
 376                                 1 /* notification bitmap length */ + \
 377                                 1 /* notification bitmap, word 0 */)
 378 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 379                                 encode_stateid_maxsz)
 380 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 381                                 decode_stateid_maxsz + \
 382                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 383 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 384                                 2 /* offset */ + \
 385                                 2 /* length */ + \
 386                                 1 /* reclaim */ + \
 387                                 encode_stateid_maxsz + \
 388                                 1 /* new offset (true) */ + \
 389                                 2 /* last byte written */ + \
 390                                 1 /* nt_timechanged (false) */ + \
 391                                 1 /* layoutupdate4 layout type */ + \
 392                                 1 /* layoutupdate4 opaqueue len */)
 393                                   /* the actual content of layoutupdate4 should
 394                                      be allocated by drivers and spliced in
 395                                      using xdr_write_pages */
 396 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 397 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 398                                 encode_stateid_maxsz + \
 399                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 400 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 401                                 1 + decode_stateid_maxsz)
 402 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 403 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 404 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 405                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 406 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 407 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 408                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 409 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 410 #else /* CONFIG_NFS_V4_1 */
 411 #define encode_sequence_maxsz   0
 412 #define decode_sequence_maxsz   0
 413 #endif /* CONFIG_NFS_V4_1 */
 414
 415 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 416 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 417 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 418                                 encode_sequence_maxsz + \
 419                                 encode_putfh_maxsz + \
 420                                 encode_read_maxsz)
 421 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 422                                 decode_sequence_maxsz + \
 423                                 decode_putfh_maxsz + \
 424                                 decode_read_maxsz)
 425 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 426                                 encode_sequence_maxsz + \
 427                                 encode_putfh_maxsz + \
 428                                 encode_readlink_maxsz)
 429 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 430                                 decode_sequence_maxsz + \
 431                                 decode_putfh_maxsz + \
 432                                 decode_readlink_maxsz)
 433 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 434                                 encode_sequence_maxsz + \
 435                                 encode_putfh_maxsz + \
 436                                 encode_readdir_maxsz)
 437 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 438                                 decode_sequence_maxsz + \
 439                                 decode_putfh_maxsz + \
 440                                 decode_readdir_maxsz)
 441 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_write_maxsz + \
 445                                 encode_getattr_maxsz)
 446 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 447                                 decode_sequence_maxsz + \
 448                                 decode_putfh_maxsz + \
 449                                 decode_write_maxsz + \
 450                                 decode_getattr_maxsz)
 451 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 452                                 encode_sequence_maxsz + \
 453                                 encode_putfh_maxsz + \
 454                                 encode_commit_maxsz)
 455 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 456                                 decode_sequence_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_commit_maxsz)
 459 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 460                                 encode_sequence_maxsz + \
 461                                 encode_putfh_maxsz + \
 462                                 encode_open_maxsz + \
 463                                 encode_access_maxsz + \
 464                                 encode_getfh_maxsz + \
 465                                 encode_getattr_maxsz)
 466 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 467                                 decode_sequence_maxsz + \
 468                                 decode_putfh_maxsz + \
 469                                 decode_open_maxsz + \
 470                                 decode_access_maxsz + \
 471                                 decode_getfh_maxsz + \
 472                                 decode_getattr_maxsz)
 473 #define NFS4_enc_open_confirm_sz \
 474                                 (compound_encode_hdr_maxsz + \
 475                                  encode_putfh_maxsz + \
 476                                  encode_open_confirm_maxsz)
 477 #define NFS4_dec_open_confirm_sz \
 478                                 (compound_decode_hdr_maxsz + \
 479                                  decode_putfh_maxsz + \
 480                                  decode_open_confirm_maxsz)
 481 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 482                                         encode_sequence_maxsz + \
 483                                         encode_putfh_maxsz + \
 484                                         encode_open_maxsz + \
 485                                         encode_access_maxsz + \
 486                                         encode_getattr_maxsz)
 487 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 488                                         decode_sequence_maxsz + \
 489                                         decode_putfh_maxsz + \
 490                                         decode_open_maxsz + \
 491                                         decode_access_maxsz + \
 492                                         decode_getattr_maxsz)
 493 #define NFS4_enc_open_downgrade_sz \
 494                                 (compound_encode_hdr_maxsz + \
 495                                  encode_sequence_maxsz + \
 496                                  encode_putfh_maxsz + \
 497                                  encode_open_downgrade_maxsz + \
 498                                  encode_getattr_maxsz)
 499 #define NFS4_dec_open_downgrade_sz \
 500                                 (compound_decode_hdr_maxsz + \
 501                                  decode_sequence_maxsz + \
 502                                  decode_putfh_maxsz + \
 503                                  decode_open_downgrade_maxsz + \
 504                                  decode_getattr_maxsz)
 505 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 506                                  encode_sequence_maxsz + \
 507                                  encode_putfh_maxsz + \
 508                                  encode_close_maxsz + \
 509                                  encode_getattr_maxsz)
 510 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 511                                  decode_sequence_maxsz + \
 512                                  decode_putfh_maxsz + \
 513                                  decode_close_maxsz + \
 514                                  decode_getattr_maxsz)
 515 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 516                                  encode_sequence_maxsz + \
 517                                  encode_putfh_maxsz + \
 518                                  encode_setattr_maxsz + \
 519                                  encode_getattr_maxsz)
 520 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 521                                  decode_sequence_maxsz + \
 522                                  decode_putfh_maxsz + \
 523                                  decode_setattr_maxsz + \
 524                                  decode_getattr_maxsz)
 525 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 526                                 encode_sequence_maxsz + \
 527                                 encode_putfh_maxsz + \
 528                                 encode_fsinfo_maxsz)
 529 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 530                                 decode_sequence_maxsz + \
 531                                 decode_putfh_maxsz + \
 532                                 decode_fsinfo_maxsz)
 533 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 534                                 encode_renew_maxsz)
 535 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 536                                 decode_renew_maxsz)
 537 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 538                                 encode_setclientid_maxsz)
 539 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 540                                 decode_setclientid_maxsz)
 541 #define NFS4_enc_setclientid_confirm_sz \
 542                                 (compound_encode_hdr_maxsz + \
 543                                 encode_setclientid_confirm_maxsz)
 544 #define NFS4_dec_setclientid_confirm_sz \
 545                                 (compound_decode_hdr_maxsz + \
 546                                 decode_setclientid_confirm_maxsz)
 547 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 548                                 encode_sequence_maxsz + \
 549                                 encode_putfh_maxsz + \
 550                                 encode_lock_maxsz)
 551 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 552                                 decode_sequence_maxsz + \
 553                                 decode_putfh_maxsz + \
 554                                 decode_lock_maxsz)
 555 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 556                                 encode_sequence_maxsz + \
 557                                 encode_putfh_maxsz + \
 558                                 encode_lockt_maxsz)
 559 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 560                                  decode_sequence_maxsz + \
 561                                  decode_putfh_maxsz + \
 562                                  decode_lockt_maxsz)
 563 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 564                                 encode_sequence_maxsz + \
 565                                 encode_putfh_maxsz + \
 566                                 encode_locku_maxsz)
 567 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 568                                 decode_sequence_maxsz + \
 569                                 decode_putfh_maxsz + \
 570                                 decode_locku_maxsz)
 571 #define NFS4_enc_release_lockowner_sz \
 572                                 (compound_encode_hdr_maxsz + \
 573                                  encode_lockowner_maxsz)
 574 #define NFS4_dec_release_lockowner_sz \
 575                                 (compound_decode_hdr_maxsz + \
 576                                  decode_lockowner_maxsz)
 577 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 578                                 encode_sequence_maxsz + \
 579                                 encode_putfh_maxsz + \
 580                                 encode_access_maxsz + \
 581                                 encode_getattr_maxsz)
 582 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 583                                 decode_sequence_maxsz + \
 584                                 decode_putfh_maxsz + \
 585                                 decode_access_maxsz + \
 586                                 decode_getattr_maxsz)
 587 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 588                                 encode_sequence_maxsz + \
 589                                 encode_putfh_maxsz + \
 590                                 encode_getattr_maxsz + \
 591                                 encode_renew_maxsz)
 592 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_getattr_maxsz + \
 596                                 decode_renew_maxsz)
 597 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 598                                 encode_sequence_maxsz + \
 599                                 encode_putfh_maxsz + \
 600                                 encode_lookup_maxsz + \
 601                                 encode_getattr_maxsz + \
 602                                 encode_getfh_maxsz)
 603 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 604                                 decode_sequence_maxsz + \
 605                                 decode_putfh_maxsz + \
 606                                 decode_lookup_maxsz + \
 607                                 decode_getattr_maxsz + \
 608                                 decode_getfh_maxsz)
 609 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 610                                 encode_sequence_maxsz + \
 611                                 encode_putrootfh_maxsz + \
 612                                 encode_getattr_maxsz + \
 613                                 encode_getfh_maxsz)
 614 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 615                                 decode_sequence_maxsz + \
 616                                 decode_putrootfh_maxsz + \
 617                                 decode_getattr_maxsz + \
 618                                 decode_getfh_maxsz)
 619 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 620                                 encode_sequence_maxsz + \
 621                                 encode_putfh_maxsz + \
 622                                 encode_remove_maxsz)
 623 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 624                                 decode_sequence_maxsz + \
 625                                 decode_putfh_maxsz + \
 626                                 decode_remove_maxsz)
 627 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 628                                 encode_sequence_maxsz + \
 629                                 encode_putfh_maxsz + \
 630                                 encode_savefh_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_rename_maxsz)
 633 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_savefh_maxsz + \
 637                                 decode_putfh_maxsz + \
 638                                 decode_rename_maxsz)
 639 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 640                                 encode_sequence_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_savefh_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_link_maxsz + \
 645                                 encode_restorefh_maxsz + \
 646                                 encode_getattr_maxsz)
 647 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 648                                 decode_sequence_maxsz + \
 649                                 decode_putfh_maxsz + \
 650                                 decode_savefh_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_link_maxsz + \
 653                                 decode_restorefh_maxsz + \
 654                                 decode_getattr_maxsz)
 655 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 656                                 encode_sequence_maxsz + \
 657                                 encode_putfh_maxsz + \
 658                                 encode_symlink_maxsz + \
 659                                 encode_getattr_maxsz + \
 660                                 encode_getfh_maxsz)
 661 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 662                                 decode_sequence_maxsz + \
 663                                 decode_putfh_maxsz + \
 664                                 decode_symlink_maxsz + \
 665                                 decode_getattr_maxsz + \
 666                                 decode_getfh_maxsz)
 667 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 668                                 encode_sequence_maxsz + \
 669                                 encode_putfh_maxsz + \
 670                                 encode_create_maxsz + \
 671                                 encode_getfh_maxsz + \
 672                                 encode_getattr_maxsz)
 673 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 674                                 decode_sequence_maxsz + \
 675                                 decode_putfh_maxsz + \
 676                                 decode_create_maxsz + \
 677                                 decode_getfh_maxsz + \
 678                                 decode_getattr_maxsz)
 679 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 680                                 encode_sequence_maxsz + \
 681                                 encode_putfh_maxsz + \
 682                                 encode_getattr_maxsz)
 683 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 684                                 decode_sequence_maxsz + \
 685                                 decode_putfh_maxsz + \
 686                                 decode_getattr_maxsz)
 687 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 688                                 encode_sequence_maxsz + \
 689                                 encode_putfh_maxsz + \
 690                                 encode_statfs_maxsz)
 691 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 692                                 decode_sequence_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_statfs_maxsz)
 695 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 696                                 encode_sequence_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_getattr_maxsz)
 699 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 700                                 decode_sequence_maxsz + \
 701                                 decode_putfh_maxsz + \
 702                                 decode_getattr_maxsz)
 703 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 704                                 encode_sequence_maxsz + \
 705                                 encode_putfh_maxsz + \
 706                                 encode_delegreturn_maxsz + \
 707                                 encode_getattr_maxsz)
 708 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 709                                 decode_sequence_maxsz + \
 710                                 decode_delegreturn_maxsz + \
 711                                 decode_getattr_maxsz)
 712 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 713                                 encode_sequence_maxsz + \
 714                                 encode_putfh_maxsz + \
 715                                 encode_getacl_maxsz)
 716 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 717                                 decode_sequence_maxsz + \
 718                                 decode_putfh_maxsz + \
 719                                 decode_getacl_maxsz)
 720 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 721                                 encode_sequence_maxsz + \
 722                                 encode_putfh_maxsz + \
 723                                 encode_setacl_maxsz)
 724 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 725                                 decode_sequence_maxsz + \
 726                                 decode_putfh_maxsz + \
 727                                 decode_setacl_maxsz)
 728 #define NFS4_enc_fs_locations_sz \
 729                                 (compound_encode_hdr_maxsz + \
 730                                  encode_sequence_maxsz + \
 731                                  encode_putfh_maxsz + \
 732                                  encode_lookup_maxsz + \
 733                                  encode_fs_locations_maxsz + \
 734                                  encode_renew_maxsz)
 735 #define NFS4_dec_fs_locations_sz \
 736                                 (compound_decode_hdr_maxsz + \
 737                                  decode_sequence_maxsz + \
 738                                  decode_putfh_maxsz + \
 739                                  decode_lookup_maxsz + \
 740                                  decode_fs_locations_maxsz + \
 741                                  decode_renew_maxsz)
 742 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 743                                 encode_sequence_maxsz + \
 744                                 encode_putfh_maxsz + \
 745                                 encode_secinfo_maxsz)
 746 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 747                                 decode_sequence_maxsz + \
 748                                 decode_putfh_maxsz + \
 749                                 decode_secinfo_maxsz)
 750 #define NFS4_enc_fsid_present_sz \
 751                                 (compound_encode_hdr_maxsz + \
 752                                  encode_sequence_maxsz + \
 753                                  encode_putfh_maxsz + \
 754                                  encode_getfh_maxsz + \
 755                                  encode_renew_maxsz)
 756 #define NFS4_dec_fsid_present_sz \
 757                                 (compound_decode_hdr_maxsz + \
 758                                  decode_sequence_maxsz + \
 759                                  decode_putfh_maxsz + \
 760                                  decode_getfh_maxsz + \
 761                                  decode_renew_maxsz)
 762 #if defined(CONFIG_NFS_V4_1)
 763 #define NFS4_enc_bind_conn_to_session_sz \
 764                                 (compound_encode_hdr_maxsz + \
 765                                  encode_bind_conn_to_session_maxsz)
 766 #define NFS4_dec_bind_conn_to_session_sz \
 767                                 (compound_decode_hdr_maxsz + \
 768                                  decode_bind_conn_to_session_maxsz)
 769 #define NFS4_enc_exchange_id_sz \
 770                                 (compound_encode_hdr_maxsz + \
 771                                  encode_exchange_id_maxsz)
 772 #define NFS4_dec_exchange_id_sz \
 773                                 (compound_decode_hdr_maxsz + \
 774                                  decode_exchange_id_maxsz)
 775 #define NFS4_enc_create_session_sz \
 776                                 (compound_encode_hdr_maxsz + \
 777                                  encode_create_session_maxsz)
 778 #define NFS4_dec_create_session_sz \
 779                                 (compound_decode_hdr_maxsz + \
 780                                  decode_create_session_maxsz)
 781 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 782                                          encode_destroy_session_maxsz)
 783 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 784                                          decode_destroy_session_maxsz)
 785 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 786                                          encode_destroy_clientid_maxsz)
 787 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 788                                          decode_destroy_clientid_maxsz)
 789 #define NFS4_enc_sequence_sz \
 790                                 (compound_decode_hdr_maxsz + \
 791                                  encode_sequence_maxsz)
 792 #define NFS4_dec_sequence_sz \
 793                                 (compound_decode_hdr_maxsz + \
 794                                  decode_sequence_maxsz)
 795 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 796                                          encode_sequence_maxsz + \
 797                                          encode_putrootfh_maxsz + \
 798                                          encode_fsinfo_maxsz)
 799 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 800                                          decode_sequence_maxsz + \
 801                                          decode_putrootfh_maxsz + \
 802                                          decode_fsinfo_maxsz)
 803 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 804                                          encode_sequence_maxsz + \
 805                                          encode_reclaim_complete_maxsz)
 806 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 807                                          decode_sequence_maxsz + \
 808                                          decode_reclaim_complete_maxsz)
 809 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 810                                 encode_sequence_maxsz +\
 811                                 encode_getdeviceinfo_maxsz)
 812 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 813                                 decode_sequence_maxsz + \
 814                                 decode_getdeviceinfo_maxsz)
 815 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 816                                 encode_sequence_maxsz + \
 817                                 encode_putfh_maxsz +        \
 818                                 encode_layoutget_maxsz)
 819 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 820                                 decode_sequence_maxsz + \
 821                                 decode_putfh_maxsz +        \
 822                                 decode_layoutget_maxsz)
 823 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 824                                 encode_sequence_maxsz +\
 825                                 encode_putfh_maxsz + \
 826                                 encode_layoutcommit_maxsz + \
 827                                 encode_getattr_maxsz)
 828 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 829                                 decode_sequence_maxsz + \
 830                                 decode_putfh_maxsz + \
 831                                 decode_layoutcommit_maxsz + \
 832                                 decode_getattr_maxsz)
 833 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 834                                 encode_sequence_maxsz + \
 835                                 encode_putfh_maxsz + \
 836                                 encode_layoutreturn_maxsz)
 837 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 838                                 decode_sequence_maxsz + \
 839                                 decode_putfh_maxsz + \
 840                                 decode_layoutreturn_maxsz)
 841 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 842                                         encode_sequence_maxsz + \
 843                                         encode_putrootfh_maxsz +\
 844                                         encode_secinfo_no_name_maxsz)
 845 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 846                                         decode_sequence_maxsz + \
 847                                         decode_putrootfh_maxsz + \
 848                                         decode_secinfo_no_name_maxsz)
 849 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 850                                          encode_sequence_maxsz + \
 851                                          encode_test_stateid_maxsz)
 852 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 853                                          decode_sequence_maxsz + \
 854                                          decode_test_stateid_maxsz)
 855 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 856                                          encode_sequence_maxsz + \
 857                                          encode_free_stateid_maxsz)
 858 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 859                                          decode_sequence_maxsz + \
 860                                          decode_free_stateid_maxsz)
 861
 862 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 863                                       compound_encode_hdr_maxsz +
 864                                       encode_sequence_maxsz +
 865                                       encode_putfh_maxsz +
 866                                       encode_getattr_maxsz) *
 867                                      XDR_UNIT);
 868
 869 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 870                                      compound_decode_hdr_maxsz +
 871                                      decode_sequence_maxsz +
 872                                      decode_putfh_maxsz) *
 873                                     XDR_UNIT);
 874
 875 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 876                                            compound_decode_hdr_maxsz +
 877                                            decode_sequence_maxsz) *
 878                                           XDR_UNIT);
 879 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 880 #endif /* CONFIG_NFS_V4_1 */
 881
 882 static const umode_t nfs_type2fmt[] = {
 883         [NF4BAD] = 0,
 884         [NF4REG] = S_IFREG,
 885         [NF4DIR] = S_IFDIR,
 886         [NF4BLK] = S_IFBLK,
 887         [NF4CHR] = S_IFCHR,
 888         [NF4LNK] = S_IFLNK,
 889         [NF4SOCK] = S_IFSOCK,
 890         [NF4FIFO] = S_IFIFO,
 891         [NF4ATTRDIR] = 0,
 892         [NF4NAMEDATTR] = 0,
 893 };
 894
 895 struct compound_hdr {
 896         int32_t         status;
 897         uint32_t        nops;
 898         __be32 *        nops_p;
 899         uint32_t        taglen;
 900         char *          tag;
 901         uint32_t        replen;         /* expected reply words */
 902         u32             minorversion;
 903 };
 904
 905 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 906 {
 907         __be32 *p = xdr_reserve_space(xdr, nbytes);
 908         BUG_ON(!p);
 909         return p;
 910 }
 911
 912 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 913 {
 914         __be32 *p;
 915
 916         p = xdr_reserve_space(xdr, len);
 917         xdr_encode_opaque_fixed(p, buf, len);
 918 }
 919
 920 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 921 {
 922         __be32 *p;
 923
 924         p = reserve_space(xdr, 4 + len);
 925         xdr_encode_opaque(p, str, len);
 926 }
 927
 928 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 929 {
 930         __be32 *p;
 931
 932         p = reserve_space(xdr, 4);
 933         *p = cpu_to_be32(n);
 934 }
 935
 936 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 937 {
 938         __be32 *p;
 939
 940         p = reserve_space(xdr, 8);
 941         xdr_encode_hyper(p, n);
 942 }
 943
 944 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 945                 const struct nfs_seqid *seqid)
 946 {
 947         encode_uint32(xdr, seqid->sequence->counter);
 948 }
 949
 950 static void encode_compound_hdr(struct xdr_stream *xdr,
 951                                 struct rpc_rqst *req,
 952                                 struct compound_hdr *hdr)
 953 {
 954         __be32 *p;
 955         struct rpc_auth *auth = req->rq_cred->cr_auth;
 956
 957         /* initialize running count of expected bytes in reply.
 958          * NOTE: the replied tag SHOULD be the same is the one sent,
 959          * but this is not required as a MUST for the server to do so. */
 960         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 961
 962         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 963         encode_string(xdr, hdr->taglen, hdr->tag);
 964         p = reserve_space(xdr, 8);
 965         *p++ = cpu_to_be32(hdr->minorversion);
 966         hdr->nops_p = p;
 967         *p = cpu_to_be32(hdr->nops);
 968 }
 969
 970 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 971                 uint32_t replen,
 972                 struct compound_hdr *hdr)
 973 {
 974         encode_uint32(xdr, op);
 975         hdr->nops++;
 976         hdr->replen += replen;
 977 }
 978
 979 static void encode_nops(struct compound_hdr *hdr)
 980 {
 981         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 982         *hdr->nops_p = htonl(hdr->nops);
 983 }
 984
 985 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 986 {
 987         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 988 }
 989
 990 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 991 {
 992         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 993 }
 994
 995 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
 996                                 const struct nfs4_label *label,
 997                                 const struct nfs_server *server)
 998 {
 999         char owner_name[IDMAP_NAMESZ];
1000         char owner_group[IDMAP_NAMESZ];
1001         int owner_namelen = 0;
1002         int owner_grouplen = 0;
1003         __be32 *p;
1004         unsigned i;
1005         uint32_t len = 0;
1006         uint32_t bmval_len;
1007         uint32_t bmval[3] = { 0 };
1008
1009         /*
1010          * We reserve enough space to write the entire attribute buffer at once.
1011          * In the worst-case, this would be
1012          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1013          * = 40 bytes, plus any contribution from variable-length fields
1014          *            such as owner/group.
1015          */
1016         if (iap->ia_valid & ATTR_SIZE) {
1017                 bmval[0] |= FATTR4_WORD0_SIZE;
1018                 len += 8;
1019         }
1020         if (iap->ia_valid & ATTR_MODE) {
1021                 bmval[1] |= FATTR4_WORD1_MODE;
1022                 len += 4;
1023         }
1024         if (iap->ia_valid & ATTR_UID) {
1025                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1026                 if (owner_namelen < 0) {
1027                         dprintk("nfs: couldn't resolve uid %d to string\n",
1028                                         from_kuid(&init_user_ns, iap->ia_uid));
1029                         /* XXX */
1030                         strcpy(owner_name, "nobody");
1031                         owner_namelen = sizeof("nobody") - 1;
1032                         /* goto out; */
1033                 }
1034                 bmval[1] |= FATTR4_WORD1_OWNER;
1035                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1036         }
1037         if (iap->ia_valid & ATTR_GID) {
1038                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1039                 if (owner_grouplen < 0) {
1040                         dprintk("nfs: couldn't resolve gid %d to string\n",
1041                                         from_kgid(&init_user_ns, iap->ia_gid));
1042                         strcpy(owner_group, "nobody");
1043                         owner_grouplen = sizeof("nobody") - 1;
1044                         /* goto out; */
1045                 }
1046                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1047                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1048         }
1049         if (iap->ia_valid & ATTR_ATIME_SET) {
1050                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1051                 len += 16;
1052         } else if (iap->ia_valid & ATTR_ATIME) {
1053                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1054                 len += 4;
1055         }
1056         if (iap->ia_valid & ATTR_MTIME_SET) {
1057                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1058                 len += 16;
1059         } else if (iap->ia_valid & ATTR_MTIME) {
1060                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1061                 len += 4;
1062         }
1063         if (label) {
1064                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1065                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1066         }
1067
1068         if (bmval[2] != 0)
1069                 bmval_len = 3;
1070         else if (bmval[1] != 0)
1071                 bmval_len = 2;
1072         else
1073                 bmval_len = 1;
1074
1075         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1076
1077         *p++ = cpu_to_be32(bmval_len);
1078         for (i = 0; i < bmval_len; i++)
1079                 *p++ = cpu_to_be32(bmval[i]);
1080         *p++ = cpu_to_be32(len);
1081
1082         if (bmval[0] & FATTR4_WORD0_SIZE)
1083                 p = xdr_encode_hyper(p, iap->ia_size);
1084         if (bmval[1] & FATTR4_WORD1_MODE)
1085                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1086         if (bmval[1] & FATTR4_WORD1_OWNER)
1087                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1088         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1089                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1090         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1091                 if (iap->ia_valid & ATTR_ATIME_SET) {
1092                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1093                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1094                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1095                 } else
1096                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1097         }
1098         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1099                 if (iap->ia_valid & ATTR_MTIME_SET) {
1100                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1101                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1102                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1103                 } else
1104                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1105         }
1106         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1107                 *p++ = cpu_to_be32(label->lfs);
1108                 *p++ = cpu_to_be32(label->pi);
1109                 *p++ = cpu_to_be32(label->len);
1110                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1111         }
1112
1113 /* out: */
1114 }
1115
1116 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1117 {
1118         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1119         encode_uint32(xdr, access);
1120 }
1121
1122 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1123 {
1124         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1125         encode_nfs4_seqid(xdr, arg->seqid);
1126         encode_nfs4_stateid(xdr, arg->stateid);
1127 }
1128
1129 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1130 {
1131         __be32 *p;
1132
1133         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1134         p = reserve_space(xdr, 12);
1135         p = xdr_encode_hyper(p, args->offset);
1136         *p = cpu_to_be32(args->count);
1137 }
1138
1139 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1140 {
1141         __be32 *p;
1142
1143         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1144         encode_uint32(xdr, create->ftype);
1145
1146         switch (create->ftype) {
1147         case NF4LNK:
1148                 p = reserve_space(xdr, 4);
1149                 *p = cpu_to_be32(create->u.symlink.len);
1150                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1151                 break;
1152
1153         case NF4BLK: case NF4CHR:
1154                 p = reserve_space(xdr, 8);
1155                 *p++ = cpu_to_be32(create->u.device.specdata1);
1156                 *p = cpu_to_be32(create->u.device.specdata2);
1157                 break;
1158
1159         default:
1160                 break;
1161         }
1162
1163         encode_string(xdr, create->name->len, create->name->name);
1164         encode_attrs(xdr, create->attrs, create->label, create->server);
1165 }
1166
1167 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1168 {
1169         __be32 *p;
1170
1171         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1172         p = reserve_space(xdr, 8);
1173         *p++ = cpu_to_be32(1);
1174         *p = cpu_to_be32(bitmap);
1175 }
1176
1177 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1178 {
1179         __be32 *p;
1180
1181         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1182         p = reserve_space(xdr, 12);
1183         *p++ = cpu_to_be32(2);
1184         *p++ = cpu_to_be32(bm0);
1185         *p = cpu_to_be32(bm1);
1186 }
1187
1188 static void
1189 encode_getattr_three(struct xdr_stream *xdr,
1190                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1191                      struct compound_hdr *hdr)
1192 {
1193         __be32 *p;
1194
1195         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1196         if (bm2) {
1197                 p = reserve_space(xdr, 16);
1198                 *p++ = cpu_to_be32(3);
1199                 *p++ = cpu_to_be32(bm0);
1200                 *p++ = cpu_to_be32(bm1);
1201                 *p = cpu_to_be32(bm2);
1202         } else if (bm1) {
1203                 p = reserve_space(xdr, 12);
1204                 *p++ = cpu_to_be32(2);
1205                 *p++ = cpu_to_be32(bm0);
1206                 *p = cpu_to_be32(bm1);
1207         } else {
1208                 p = reserve_space(xdr, 8);
1209                 *p++ = cpu_to_be32(1);
1210                 *p = cpu_to_be32(bm0);
1211         }
1212 }
1213
1214 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1215 {
1216         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1217                            bitmask[1] & nfs4_fattr_bitmap[1],
1218                            bitmask[2] & nfs4_fattr_bitmap[2],
1219                            hdr);
1220 }
1221
1222 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1223                                  const u32 *open_bitmap,
1224                                  struct compound_hdr *hdr)
1225 {
1226         encode_getattr_three(xdr,
1227                              bitmask[0] & open_bitmap[0],
1228                              bitmask[1] & open_bitmap[1],
1229                              bitmask[2] & open_bitmap[2],
1230                              hdr);
1231 }
1232
1233 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1234 {
1235         encode_getattr_three(xdr,
1236                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1237                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1238                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1239                              hdr);
1240 }
1241
1242 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1243 {
1244         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1245                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1246 }
1247
1248 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1249 {
1250         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1251 }
1252
1253 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1254 {
1255         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1256         encode_string(xdr, name->len, name->name);
1257 }
1258
1259 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1260 {
1261         if (fl->fl_type == F_RDLCK)
1262                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1263         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1264 }
1265
1266 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1267 {
1268         if (fl->fl_end == OFFSET_MAX)
1269                 return ~(uint64_t)0;
1270         return fl->fl_end - fl->fl_start + 1;
1271 }
1272
1273 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1274 {
1275         __be32 *p;
1276
1277         p = reserve_space(xdr, 32);
1278         p = xdr_encode_hyper(p, lowner->clientid);
1279         *p++ = cpu_to_be32(20);
1280         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1281         *p++ = cpu_to_be32(lowner->s_dev);
1282         xdr_encode_hyper(p, lowner->id);
1283 }
1284
1285 /*
1286  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1287  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1288  */
1289 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1290 {
1291         __be32 *p;
1292
1293         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1294         p = reserve_space(xdr, 28);
1295         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1296         *p++ = cpu_to_be32(args->reclaim);
1297         p = xdr_encode_hyper(p, args->fl->fl_start);
1298         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299         *p = cpu_to_be32(args->new_lock_owner);
1300         if (args->new_lock_owner){
1301                 encode_nfs4_seqid(xdr, args->open_seqid);
1302                 encode_nfs4_stateid(xdr, args->open_stateid);
1303                 encode_nfs4_seqid(xdr, args->lock_seqid);
1304                 encode_lockowner(xdr, &args->lock_owner);
1305         }
1306         else {
1307                 encode_nfs4_stateid(xdr, args->lock_stateid);
1308                 encode_nfs4_seqid(xdr, args->lock_seqid);
1309         }
1310 }
1311
1312 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1313 {
1314         __be32 *p;
1315
1316         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1317         p = reserve_space(xdr, 20);
1318         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1319         p = xdr_encode_hyper(p, args->fl->fl_start);
1320         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321         encode_lockowner(xdr, &args->lock_owner);
1322 }
1323
1324 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1325 {
1326         __be32 *p;
1327
1328         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1329         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1330         encode_nfs4_seqid(xdr, args->seqid);
1331         encode_nfs4_stateid(xdr, args->stateid);
1332         p = reserve_space(xdr, 16);
1333         p = xdr_encode_hyper(p, args->fl->fl_start);
1334         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335 }
1336
1337 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1338 {
1339         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1340         encode_lockowner(xdr, lowner);
1341 }
1342
1343 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1344 {
1345         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1346         encode_string(xdr, name->len, name->name);
1347 }
1348
1349 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1350 {
1351         __be32 *p;
1352
1353         p = reserve_space(xdr, 8);
1354         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1355         case FMODE_READ:
1356                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1357                 break;
1358         case FMODE_WRITE:
1359                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1360                 break;
1361         case FMODE_READ|FMODE_WRITE:
1362                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1363                 break;
1364         default:
1365                 *p++ = cpu_to_be32(0);
1366         }
1367         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1368 }
1369
1370 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1371 {
1372         __be32 *p;
1373  /*
1374  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1375  * owner 4 = 32
1376  */
1377         encode_nfs4_seqid(xdr, arg->seqid);
1378         encode_share_access(xdr, arg->fmode);
1379         p = reserve_space(xdr, 36);
1380         p = xdr_encode_hyper(p, arg->clientid);
1381         *p++ = cpu_to_be32(24);
1382         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1383         *p++ = cpu_to_be32(arg->server->s_dev);
1384         *p++ = cpu_to_be32(arg->id.uniquifier);
1385         xdr_encode_hyper(p, arg->id.create_time);
1386 }
1387
1388 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1389 {
1390         struct iattr dummy;
1391         __be32 *p;
1392
1393         p = reserve_space(xdr, 4);
1394         switch(arg->createmode) {
1395         case NFS4_CREATE_UNCHECKED:
1396                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1397                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1398                 break;
1399         case NFS4_CREATE_GUARDED:
1400                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1401                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1402                 break;
1403         case NFS4_CREATE_EXCLUSIVE:
1404                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1405                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1406                 break;
1407         case NFS4_CREATE_EXCLUSIVE4_1:
1408                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1409                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1410                 dummy.ia_valid = 0;
1411                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1412         }
1413 }
1414
1415 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1416 {
1417         __be32 *p;
1418
1419         p = reserve_space(xdr, 4);
1420         switch (arg->open_flags & O_CREAT) {
1421         case 0:
1422                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1423                 break;
1424         default:
1425                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1426                 encode_createmode(xdr, arg);
1427         }
1428 }
1429
1430 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1431 {
1432         __be32 *p;
1433
1434         p = reserve_space(xdr, 4);
1435         switch (delegation_type) {
1436         case 0:
1437                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1438                 break;
1439         case FMODE_READ:
1440                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1441                 break;
1442         case FMODE_WRITE|FMODE_READ:
1443                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1444                 break;
1445         default:
1446                 BUG();
1447         }
1448 }
1449
1450 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1451 {
1452         __be32 *p;
1453
1454         p = reserve_space(xdr, 4);
1455         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1456         encode_string(xdr, name->len, name->name);
1457 }
1458
1459 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1460 {
1461         __be32 *p;
1462
1463         p = reserve_space(xdr, 4);
1464         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1465         encode_delegation_type(xdr, type);
1466 }
1467
1468 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1469 {
1470         __be32 *p;
1471
1472         p = reserve_space(xdr, 4);
1473         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1474         encode_nfs4_stateid(xdr, stateid);
1475         encode_string(xdr, name->len, name->name);
1476 }
1477
1478 static inline void encode_claim_fh(struct xdr_stream *xdr)
1479 {
1480         __be32 *p;
1481
1482         p = reserve_space(xdr, 4);
1483         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1484 }
1485
1486 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4);
1491         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1492         encode_nfs4_stateid(xdr, stateid);
1493 }
1494
1495 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1496 {
1497         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1498         encode_openhdr(xdr, arg);
1499         encode_opentype(xdr, arg);
1500         switch (arg->claim) {
1501         case NFS4_OPEN_CLAIM_NULL:
1502                 encode_claim_null(xdr, arg->name);
1503                 break;
1504         case NFS4_OPEN_CLAIM_PREVIOUS:
1505                 encode_claim_previous(xdr, arg->u.delegation_type);
1506                 break;
1507         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1508                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1509                 break;
1510         case NFS4_OPEN_CLAIM_FH:
1511                 encode_claim_fh(xdr);
1512                 break;
1513         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1514                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1515                 break;
1516         default:
1517                 BUG();
1518         }
1519 }
1520
1521 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1522 {
1523         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1524         encode_nfs4_stateid(xdr, arg->stateid);
1525         encode_nfs4_seqid(xdr, arg->seqid);
1526 }
1527
1528 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1529 {
1530         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1531         encode_nfs4_stateid(xdr, arg->stateid);
1532         encode_nfs4_seqid(xdr, arg->seqid);
1533         encode_share_access(xdr, arg->fmode);
1534 }
1535
1536 static void
1537 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1538 {
1539         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1540         encode_string(xdr, fh->size, fh->data);
1541 }
1542
1543 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1544 {
1545         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1546 }
1547
1548 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1549                         struct compound_hdr *hdr)
1550 {
1551         __be32 *p;
1552
1553         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1554         encode_nfs4_stateid(xdr, &args->stateid);
1555
1556         p = reserve_space(xdr, 12);
1557         p = xdr_encode_hyper(p, args->offset);
1558         *p = cpu_to_be32(args->count);
1559 }
1560
1561 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1562 {
1563         uint32_t attrs[3] = {
1564                 FATTR4_WORD0_RDATTR_ERROR,
1565                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1566         };
1567         uint32_t dircount = readdir->count >> 1;
1568         __be32 *p, verf[2];
1569         uint32_t attrlen = 0;
1570         unsigned int i;
1571
1572         if (readdir->plus) {
1573                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1574                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1575                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1576                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1577                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1578                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1579                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1580                 dircount >>= 1;
1581         }
1582         /* Use mounted_on_fileid only if the server supports it */
1583         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1584                 attrs[0] |= FATTR4_WORD0_FILEID;
1585         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1586                 attrs[i] &= readdir->bitmask[i];
1587                 if (attrs[i] != 0)
1588                         attrlen = i+1;
1589         }
1590
1591         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1592         encode_uint64(xdr, readdir->cookie);
1593         encode_nfs4_verifier(xdr, &readdir->verifier);
1594         p = reserve_space(xdr, 12 + (attrlen << 2));
1595         *p++ = cpu_to_be32(dircount);
1596         *p++ = cpu_to_be32(readdir->count);
1597         *p++ = cpu_to_be32(attrlen);
1598         for (i = 0; i < attrlen; i++)
1599                 *p++ = cpu_to_be32(attrs[i]);
1600         memcpy(verf, readdir->verifier.data, sizeof(verf));
1601
1602         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1603                         __func__,
1604                         (unsigned long long)readdir->cookie,
1605                         verf[0], verf[1],
1606                         attrs[0] & readdir->bitmask[0],
1607                         attrs[1] & readdir->bitmask[1],
1608                         attrs[2] & readdir->bitmask[2]);
1609 }
1610
1611 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1612 {
1613         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1614 }
1615
1616 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1617 {
1618         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1619         encode_string(xdr, name->len, name->name);
1620 }
1621
1622 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1623 {
1624         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1625         encode_string(xdr, oldname->len, oldname->name);
1626         encode_string(xdr, newname->len, newname->name);
1627 }
1628
1629 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1630                          struct compound_hdr *hdr)
1631 {
1632         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1633         encode_uint64(xdr, clid);
1634 }
1635
1636 static void
1637 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1638 {
1639         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1640 }
1641
1642 static void
1643 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1644 {
1645         __be32 *p;
1646
1647         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1648         encode_nfs4_stateid(xdr, &zero_stateid);
1649         p = reserve_space(xdr, 2*4);
1650         *p++ = cpu_to_be32(1);
1651         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1652         p = reserve_space(xdr, 4);
1653         *p = cpu_to_be32(arg->acl_len);
1654         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1655 }
1656
1657 static void
1658 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1659 {
1660         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1661 }
1662
1663 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1664 {
1665         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1666         encode_nfs4_stateid(xdr, &arg->stateid);
1667         encode_attrs(xdr, arg->iap, arg->label, server);
1668 }
1669
1670 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1671 {
1672         __be32 *p;
1673
1674         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1675         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1676
1677         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1678         p = reserve_space(xdr, 4);
1679         *p = cpu_to_be32(setclientid->sc_prog);
1680         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1681         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1682         p = reserve_space(xdr, 4);
1683         *p = cpu_to_be32(setclientid->sc_cb_ident);
1684 }
1685
1686 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1687 {
1688         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1689                         decode_setclientid_confirm_maxsz, hdr);
1690         encode_uint64(xdr, arg->clientid);
1691         encode_nfs4_verifier(xdr, &arg->confirm);
1692 }
1693
1694 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1695                          struct compound_hdr *hdr)
1696 {
1697         __be32 *p;
1698
1699         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1700         encode_nfs4_stateid(xdr, &args->stateid);
1701
1702         p = reserve_space(xdr, 16);
1703         p = xdr_encode_hyper(p, args->offset);
1704         *p++ = cpu_to_be32(args->stable);
1705         *p = cpu_to_be32(args->count);
1706
1707         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1708 }
1709
1710 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1711 {
1712         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1713         encode_nfs4_stateid(xdr, stateid);
1714 }
1715
1716 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1717 {
1718         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1719         encode_string(xdr, name->len, name->name);
1720 }
1721
1722 #if defined(CONFIG_NFS_V4_1)
1723 /* NFSv4.1 operations */
1724 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1725                                    struct nfs4_session *session,
1726                                    struct compound_hdr *hdr)
1727 {
1728         __be32 *p;
1729
1730         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1731                 decode_bind_conn_to_session_maxsz, hdr);
1732         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1733         p = xdr_reserve_space(xdr, 8);
1734         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1735         *p = 0; /* use_conn_in_rdma_mode = False */
1736 }
1737
1738 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1739 {
1740         unsigned int i;
1741         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1742         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1743                 encode_uint32(xdr, op_map->u.words[i]);
1744 }
1745
1746 static void encode_exchange_id(struct xdr_stream *xdr,
1747                                struct nfs41_exchange_id_args *args,
1748                                struct compound_hdr *hdr)
1749 {
1750         __be32 *p;
1751         char impl_name[IMPL_NAME_LIMIT];
1752         int len = 0;
1753
1754         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1755         encode_nfs4_verifier(xdr, args->verifier);
1756
1757         encode_string(xdr, args->id_len, args->id);
1758
1759         encode_uint32(xdr, args->flags);
1760         encode_uint32(xdr, args->state_protect.how);
1761
1762         switch (args->state_protect.how) {
1763         case SP4_NONE:
1764                 break;
1765         case SP4_MACH_CRED:
1766                 encode_op_map(xdr, &args->state_protect.enforce);
1767                 encode_op_map(xdr, &args->state_protect.allow);
1768                 break;
1769         default:
1770                 WARN_ON_ONCE(1);
1771                 break;
1772         }
1773
1774         if (send_implementation_id &&
1775             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1776             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1777                 <= sizeof(impl_name) + 1)
1778                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1779                                utsname()->sysname, utsname()->release,
1780                                utsname()->version, utsname()->machine);
1781
1782         if (len > 0) {
1783                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1784
1785                 encode_string(xdr,
1786                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1787                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1788                 encode_string(xdr, len, impl_name);
1789                 /* just send zeros for nii_date - the date is in nii_name */
1790                 p = reserve_space(xdr, 12);
1791                 p = xdr_encode_hyper(p, 0);
1792                 *p = cpu_to_be32(0);
1793         } else
1794                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1795 }
1796
1797 static void encode_create_session(struct xdr_stream *xdr,
1798                                   struct nfs41_create_session_args *args,
1799                                   struct compound_hdr *hdr)
1800 {
1801         __be32 *p;
1802         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1803         uint32_t len;
1804         struct nfs_client *clp = args->client;
1805         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1806         u32 max_resp_sz_cached;
1807
1808         /*
1809          * Assumes OPEN is the biggest non-idempotent compound.
1810          * 2 is the verifier.
1811          */
1812         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1813                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1814
1815         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1816                         clp->cl_ipaddr);
1817
1818         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1819         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1820         p = xdr_encode_hyper(p, clp->cl_clientid);
1821         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1822         *p++ = cpu_to_be32(args->flags);                        /*flags */
1823
1824         /* Fore Channel */
1825         *p++ = cpu_to_be32(0);                          /* header padding size */
1826         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1827         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1828         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1829         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1830         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1831         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1832
1833         /* Back Channel */
1834         *p++ = cpu_to_be32(0);                          /* header padding size */
1835         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1836         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1837         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1838         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1839         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1840         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1841
1842         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1843         *p++ = cpu_to_be32(1);
1844         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1845
1846         /* authsys_parms rfc1831 */
1847         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1848         p = xdr_encode_opaque(p, machine_name, len);
1849         *p++ = cpu_to_be32(0);                          /* UID */
1850         *p++ = cpu_to_be32(0);                          /* GID */
1851         *p = cpu_to_be32(0);                            /* No more gids */
1852 }
1853
1854 static void encode_destroy_session(struct xdr_stream *xdr,
1855                                    struct nfs4_session *session,
1856                                    struct compound_hdr *hdr)
1857 {
1858         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1859         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1860 }
1861
1862 static void encode_destroy_clientid(struct xdr_stream *xdr,
1863                                    uint64_t clientid,
1864                                    struct compound_hdr *hdr)
1865 {
1866         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1867         encode_uint64(xdr, clientid);
1868 }
1869
1870 static void encode_reclaim_complete(struct xdr_stream *xdr,
1871                                     struct nfs41_reclaim_complete_args *args,
1872                                     struct compound_hdr *hdr)
1873 {
1874         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1875         encode_uint32(xdr, args->one_fs);
1876 }
1877 #endif /* CONFIG_NFS_V4_1 */
1878
1879 static void encode_sequence(struct xdr_stream *xdr,
1880                             const struct nfs4_sequence_args *args,
1881                             struct compound_hdr *hdr)
1882 {
1883 #if defined(CONFIG_NFS_V4_1)
1884         struct nfs4_session *session;
1885         struct nfs4_slot_table *tp;
1886         struct nfs4_slot *slot = args->sa_slot;
1887         __be32 *p;
1888
1889         tp = slot->table;
1890         session = tp->session;
1891         if (!session)
1892                 return;
1893
1894         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1895
1896         /*
1897          * Sessionid + seqid + slotid + max slotid + cache_this
1898          */
1899         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1900                 "max_slotid=%d cache_this=%d\n",
1901                 __func__,
1902                 ((u32 *)session->sess_id.data)[0],
1903                 ((u32 *)session->sess_id.data)[1],
1904                 ((u32 *)session->sess_id.data)[2],
1905                 ((u32 *)session->sess_id.data)[3],
1906                 slot->seq_nr, slot->slot_nr,
1907                 tp->highest_used_slotid, args->sa_cache_this);
1908         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1909         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1910         *p++ = cpu_to_be32(slot->seq_nr);
1911         *p++ = cpu_to_be32(slot->slot_nr);
1912         *p++ = cpu_to_be32(tp->highest_used_slotid);
1913         *p = cpu_to_be32(args->sa_cache_this);
1914 #endif /* CONFIG_NFS_V4_1 */
1915 }
1916
1917 #ifdef CONFIG_NFS_V4_1
1918 static void
1919 encode_getdeviceinfo(struct xdr_stream *xdr,
1920                      const struct nfs4_getdeviceinfo_args *args,
1921                      struct compound_hdr *hdr)
1922 {
1923         __be32 *p;
1924
1925         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1926         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1927         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1928                                     NFS4_DEVICEID4_SIZE);
1929         *p++ = cpu_to_be32(args->pdev->layout_type);
1930         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1931
1932         p = reserve_space(xdr, 4 + 4);
1933         *p++ = cpu_to_be32(1);                  /* bitmap length */
1934         *p++ = cpu_to_be32(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE);
1935 }
1936
1937 static void
1938 encode_layoutget(struct xdr_stream *xdr,
1939                       const struct nfs4_layoutget_args *args,
1940                       struct compound_hdr *hdr)
1941 {
1942         __be32 *p;
1943
1944         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1945         p = reserve_space(xdr, 36);
1946         *p++ = cpu_to_be32(0);     /* Signal layout available */
1947         *p++ = cpu_to_be32(args->type);
1948         *p++ = cpu_to_be32(args->range.iomode);
1949         p = xdr_encode_hyper(p, args->range.offset);
1950         p = xdr_encode_hyper(p, args->range.length);
1951         p = xdr_encode_hyper(p, args->minlength);
1952         encode_nfs4_stateid(xdr, &args->stateid);
1953         encode_uint32(xdr, args->maxcount);
1954
1955         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1956                 __func__,
1957                 args->type,
1958                 args->range.iomode,
1959                 (unsigned long)args->range.offset,
1960                 (unsigned long)args->range.length,
1961                 args->maxcount);
1962 }
1963
1964 static int
1965 encode_layoutcommit(struct xdr_stream *xdr,
1966                     struct inode *inode,
1967                     struct nfs4_layoutcommit_args *args,
1968                     struct compound_hdr *hdr)
1969 {
1970         __be32 *p;
1971
1972         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1973                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1974
1975         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1976         p = reserve_space(xdr, 20);
1977         /* Only whole file layouts */
1978         p = xdr_encode_hyper(p, 0); /* offset */
1979         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1980         *p = cpu_to_be32(0); /* reclaim */
1981         encode_nfs4_stateid(xdr, &args->stateid);
1982         p = reserve_space(xdr, 20);
1983         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1984         p = xdr_encode_hyper(p, args->lastbytewritten);
1985         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1986         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1987
1988         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1989                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1990                         NFS_I(inode)->layout, xdr, args);
1991         } else {
1992                 encode_uint32(xdr, args->layoutupdate_len);
1993                 if (args->layoutupdate_pages) {
1994                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
1995                                         args->layoutupdate_len);
1996                 }
1997         }
1998
1999         return 0;
2000 }
2001
2002 static void
2003 encode_layoutreturn(struct xdr_stream *xdr,
2004                     const struct nfs4_layoutreturn_args *args,
2005                     struct compound_hdr *hdr)
2006 {
2007         __be32 *p;
2008
2009         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2010         p = reserve_space(xdr, 16);
2011         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2012         *p++ = cpu_to_be32(args->layout_type);
2013         *p++ = cpu_to_be32(IOMODE_ANY);
2014         *p = cpu_to_be32(RETURN_FILE);
2015         p = reserve_space(xdr, 16);
2016         p = xdr_encode_hyper(p, 0);
2017         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2018         spin_lock(&args->inode->i_lock);
2019         encode_nfs4_stateid(xdr, &args->stateid);
2020         spin_unlock(&args->inode->i_lock);
2021         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2022                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2023                         NFS_I(args->inode)->layout, xdr, args);
2024         } else
2025                 encode_uint32(xdr, 0);
2026 }
2027
2028 static int
2029 encode_secinfo_no_name(struct xdr_stream *xdr,
2030                        const struct nfs41_secinfo_no_name_args *args,
2031                        struct compound_hdr *hdr)
2032 {
2033         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2034         encode_uint32(xdr, args->style);
2035         return 0;
2036 }
2037
2038 static void encode_test_stateid(struct xdr_stream *xdr,
2039                                 struct nfs41_test_stateid_args *args,
2040                                 struct compound_hdr *hdr)
2041 {
2042         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2043         encode_uint32(xdr, 1);
2044         encode_nfs4_stateid(xdr, args->stateid);
2045 }
2046
2047 static void encode_free_stateid(struct xdr_stream *xdr,
2048                                 struct nfs41_free_stateid_args *args,
2049                                 struct compound_hdr *hdr)
2050 {
2051         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2052         encode_nfs4_stateid(xdr, &args->stateid);
2053 }
2054 #endif /* CONFIG_NFS_V4_1 */
2055
2056 /*
2057  * END OF "GENERIC" ENCODE ROUTINES.
2058  */
2059
2060 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2061 {
2062 #if defined(CONFIG_NFS_V4_1)
2063         struct nfs4_session *session = args->sa_slot->table->session;
2064         if (session)
2065                 return session->clp->cl_mvops->minor_version;
2066 #endif /* CONFIG_NFS_V4_1 */
2067         return 0;
2068 }
2069
2070 /*
2071  * Encode an ACCESS request
2072  */
2073 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2074                                 const struct nfs4_accessargs *args)
2075 {
2076         struct compound_hdr hdr = {
2077                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2078         };
2079
2080         encode_compound_hdr(xdr, req, &hdr);
2081         encode_sequence(xdr, &args->seq_args, &hdr);
2082         encode_putfh(xdr, args->fh, &hdr);
2083         encode_access(xdr, args->access, &hdr);
2084         encode_getfattr(xdr, args->bitmask, &hdr);
2085         encode_nops(&hdr);
2086 }
2087
2088 /*
2089  * Encode LOOKUP request
2090  */
2091 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2092                                 const struct nfs4_lookup_arg *args)
2093 {
2094         struct compound_hdr hdr = {
2095                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2096         };
2097
2098         encode_compound_hdr(xdr, req, &hdr);
2099         encode_sequence(xdr, &args->seq_args, &hdr);
2100         encode_putfh(xdr, args->dir_fh, &hdr);
2101         encode_lookup(xdr, args->name, &hdr);
2102         encode_getfh(xdr, &hdr);
2103         encode_getfattr(xdr, args->bitmask, &hdr);
2104         encode_nops(&hdr);
2105 }
2106
2107 /*
2108  * Encode LOOKUP_ROOT request
2109  */
2110 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2111                                      struct xdr_stream *xdr,
2112                                      const struct nfs4_lookup_root_arg *args)
2113 {
2114         struct compound_hdr hdr = {
2115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116         };
2117
2118         encode_compound_hdr(xdr, req, &hdr);
2119         encode_sequence(xdr, &args->seq_args, &hdr);
2120         encode_putrootfh(xdr, &hdr);
2121         encode_getfh(xdr, &hdr);
2122         encode_getfattr(xdr, args->bitmask, &hdr);
2123         encode_nops(&hdr);
2124 }
2125
2126 /*
2127  * Encode REMOVE request
2128  */
2129 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2130                                 const struct nfs_removeargs *args)
2131 {
2132         struct compound_hdr hdr = {
2133                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2134         };
2135
2136         encode_compound_hdr(xdr, req, &hdr);
2137         encode_sequence(xdr, &args->seq_args, &hdr);
2138         encode_putfh(xdr, args->fh, &hdr);
2139         encode_remove(xdr, &args->name, &hdr);
2140         encode_nops(&hdr);
2141 }
2142
2143 /*
2144  * Encode RENAME request
2145  */
2146 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2147                                 const struct nfs_renameargs *args)
2148 {
2149         struct compound_hdr hdr = {
2150                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2151         };
2152
2153         encode_compound_hdr(xdr, req, &hdr);
2154         encode_sequence(xdr, &args->seq_args, &hdr);
2155         encode_putfh(xdr, args->old_dir, &hdr);
2156         encode_savefh(xdr, &hdr);
2157         encode_putfh(xdr, args->new_dir, &hdr);
2158         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2159         encode_nops(&hdr);
2160 }
2161
2162 /*
2163  * Encode LINK request
2164  */
2165 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2166                              const struct nfs4_link_arg *args)
2167 {
2168         struct compound_hdr hdr = {
2169                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2170         };
2171
2172         encode_compound_hdr(xdr, req, &hdr);
2173         encode_sequence(xdr, &args->seq_args, &hdr);
2174         encode_putfh(xdr, args->fh, &hdr);
2175         encode_savefh(xdr, &hdr);
2176         encode_putfh(xdr, args->dir_fh, &hdr);
2177         encode_link(xdr, args->name, &hdr);
2178         encode_restorefh(xdr, &hdr);
2179         encode_getfattr(xdr, args->bitmask, &hdr);
2180         encode_nops(&hdr);
2181 }
2182
2183 /*
2184  * Encode CREATE request
2185  */
2186 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2187                                 const struct nfs4_create_arg *args)
2188 {
2189         struct compound_hdr hdr = {
2190                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2191         };
2192
2193         encode_compound_hdr(xdr, req, &hdr);
2194         encode_sequence(xdr, &args->seq_args, &hdr);
2195         encode_putfh(xdr, args->dir_fh, &hdr);
2196         encode_create(xdr, args, &hdr);
2197         encode_getfh(xdr, &hdr);
2198         encode_getfattr(xdr, args->bitmask, &hdr);
2199         encode_nops(&hdr);
2200 }
2201
2202 /*
2203  * Encode SYMLINK request
2204  */
2205 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2206                                  const struct nfs4_create_arg *args)
2207 {
2208         nfs4_xdr_enc_create(req, xdr, args);
2209 }
2210
2211 /*
2212  * Encode GETATTR request
2213  */
2214 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2215                                  const struct nfs4_getattr_arg *args)
2216 {
2217         struct compound_hdr hdr = {
2218                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2219         };
2220
2221         encode_compound_hdr(xdr, req, &hdr);
2222         encode_sequence(xdr, &args->seq_args, &hdr);
2223         encode_putfh(xdr, args->fh, &hdr);
2224         encode_getfattr(xdr, args->bitmask, &hdr);
2225         encode_nops(&hdr);
2226 }
2227
2228 /*
2229  * Encode a CLOSE request
2230  */
2231 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2232                                struct nfs_closeargs *args)
2233 {
2234         struct compound_hdr hdr = {
2235                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2236         };
2237
2238         encode_compound_hdr(xdr, req, &hdr);
2239         encode_sequence(xdr, &args->seq_args, &hdr);
2240         encode_putfh(xdr, args->fh, &hdr);
2241         encode_close(xdr, args, &hdr);
2242         encode_getfattr(xdr, args->bitmask, &hdr);
2243         encode_nops(&hdr);
2244 }
2245
2246 /*
2247  * Encode an OPEN request
2248  */
2249 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2250                               struct nfs_openargs *args)
2251 {
2252         struct compound_hdr hdr = {
2253                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2254         };
2255
2256         encode_compound_hdr(xdr, req, &hdr);
2257         encode_sequence(xdr, &args->seq_args, &hdr);
2258         encode_putfh(xdr, args->fh, &hdr);
2259         encode_open(xdr, args, &hdr);
2260         encode_getfh(xdr, &hdr);
2261         if (args->access)
2262                 encode_access(xdr, args->access, &hdr);
2263         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2264         encode_nops(&hdr);
2265 }
2266
2267 /*
2268  * Encode an OPEN_CONFIRM request
2269  */
2270 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2271                                       struct xdr_stream *xdr,
2272                                       struct nfs_open_confirmargs *args)
2273 {
2274         struct compound_hdr hdr = {
2275                 .nops   = 0,
2276         };
2277
2278         encode_compound_hdr(xdr, req, &hdr);
2279         encode_putfh(xdr, args->fh, &hdr);
2280         encode_open_confirm(xdr, args, &hdr);
2281         encode_nops(&hdr);
2282 }
2283
2284 /*
2285  * Encode an OPEN request with no attributes.
2286  */
2287 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2288                                      struct xdr_stream *xdr,
2289                                      struct nfs_openargs *args)
2290 {
2291         struct compound_hdr hdr = {
2292                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2293         };
2294
2295         encode_compound_hdr(xdr, req, &hdr);
2296         encode_sequence(xdr, &args->seq_args, &hdr);
2297         encode_putfh(xdr, args->fh, &hdr);
2298         encode_open(xdr, args, &hdr);
2299         if (args->access)
2300                 encode_access(xdr, args->access, &hdr);
2301         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2302         encode_nops(&hdr);
2303 }
2304
2305 /*
2306  * Encode an OPEN_DOWNGRADE request
2307  */
2308 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2309                                         struct xdr_stream *xdr,
2310                                         struct nfs_closeargs *args)
2311 {
2312         struct compound_hdr hdr = {
2313                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314         };
2315
2316         encode_compound_hdr(xdr, req, &hdr);
2317         encode_sequence(xdr, &args->seq_args, &hdr);
2318         encode_putfh(xdr, args->fh, &hdr);
2319         encode_open_downgrade(xdr, args, &hdr);
2320         encode_getfattr(xdr, args->bitmask, &hdr);
2321         encode_nops(&hdr);
2322 }
2323
2324 /*
2325  * Encode a LOCK request
2326  */
2327 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2328                               struct nfs_lock_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_lock(xdr, args, &hdr);
2338         encode_nops(&hdr);
2339 }
2340
2341 /*
2342  * Encode a LOCKT request
2343  */
2344 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2345                                struct nfs_lockt_args *args)
2346 {
2347         struct compound_hdr hdr = {
2348                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2349         };
2350
2351         encode_compound_hdr(xdr, req, &hdr);
2352         encode_sequence(xdr, &args->seq_args, &hdr);
2353         encode_putfh(xdr, args->fh, &hdr);
2354         encode_lockt(xdr, args, &hdr);
2355         encode_nops(&hdr);
2356 }
2357
2358 /*
2359  * Encode a LOCKU request
2360  */
2361 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2362                                struct nfs_locku_args *args)
2363 {
2364         struct compound_hdr hdr = {
2365                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2366         };
2367
2368         encode_compound_hdr(xdr, req, &hdr);
2369         encode_sequence(xdr, &args->seq_args, &hdr);
2370         encode_putfh(xdr, args->fh, &hdr);
2371         encode_locku(xdr, args, &hdr);
2372         encode_nops(&hdr);
2373 }
2374
2375 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2376                                            struct xdr_stream *xdr,
2377                                         struct nfs_release_lockowner_args *args)
2378 {
2379         struct compound_hdr hdr = {
2380                 .minorversion = 0,
2381         };
2382
2383         encode_compound_hdr(xdr, req, &hdr);
2384         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2385         encode_nops(&hdr);
2386 }
2387
2388 /*
2389  * Encode a READLINK request
2390  */
2391 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2392                                   const struct nfs4_readlink *args)
2393 {
2394         struct compound_hdr hdr = {
2395                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2396         };
2397
2398         encode_compound_hdr(xdr, req, &hdr);
2399         encode_sequence(xdr, &args->seq_args, &hdr);
2400         encode_putfh(xdr, args->fh, &hdr);
2401         encode_readlink(xdr, args, req, &hdr);
2402
2403         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2404                         args->pgbase, args->pglen);
2405         encode_nops(&hdr);
2406 }
2407
2408 /*
2409  * Encode a READDIR request
2410  */
2411 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2412                                  const struct nfs4_readdir_arg *args)
2413 {
2414         struct compound_hdr hdr = {
2415                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2416         };
2417
2418         encode_compound_hdr(xdr, req, &hdr);
2419         encode_sequence(xdr, &args->seq_args, &hdr);
2420         encode_putfh(xdr, args->fh, &hdr);
2421         encode_readdir(xdr, args, req, &hdr);
2422
2423         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2424                          args->pgbase, args->count);
2425         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2426                         __func__, hdr.replen << 2, args->pages,
2427                         args->pgbase, args->count);
2428         encode_nops(&hdr);
2429 }
2430
2431 /*
2432  * Encode a READ request
2433  */
2434 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2435                               struct nfs_pgio_args *args)
2436 {
2437         struct compound_hdr hdr = {
2438                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439         };
2440
2441         encode_compound_hdr(xdr, req, &hdr);
2442         encode_sequence(xdr, &args->seq_args, &hdr);
2443         encode_putfh(xdr, args->fh, &hdr);
2444         encode_read(xdr, args, &hdr);
2445
2446         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2447                          args->pages, args->pgbase, args->count);
2448         req->rq_rcv_buf.flags |= XDRBUF_READ;
2449         encode_nops(&hdr);
2450 }
2451
2452 /*
2453  * Encode an SETATTR request
2454  */
2455 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2456                                  struct nfs_setattrargs *args)
2457 {
2458         struct compound_hdr hdr = {
2459                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2460         };
2461
2462         encode_compound_hdr(xdr, req, &hdr);
2463         encode_sequence(xdr, &args->seq_args, &hdr);
2464         encode_putfh(xdr, args->fh, &hdr);
2465         encode_setattr(xdr, args, args->server, &hdr);
2466         encode_getfattr(xdr, args->bitmask, &hdr);
2467         encode_nops(&hdr);
2468 }
2469
2470 /*
2471  * Encode a GETACL request
2472  */
2473 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2474                                 struct nfs_getaclargs *args)
2475 {
2476         struct compound_hdr hdr = {
2477                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2478         };
2479         uint32_t replen;
2480
2481         encode_compound_hdr(xdr, req, &hdr);
2482         encode_sequence(xdr, &args->seq_args, &hdr);
2483         encode_putfh(xdr, args->fh, &hdr);
2484         replen = hdr.replen + op_decode_hdr_maxsz + 1;
2485         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2486
2487         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2488                 args->acl_pages, args->acl_pgbase, args->acl_len);
2489
2490         encode_nops(&hdr);
2491 }
2492
2493 /*
2494  * Encode a WRITE request
2495  */
2496 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2497                                struct nfs_pgio_args *args)
2498 {
2499         struct compound_hdr hdr = {
2500                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2501         };
2502
2503         encode_compound_hdr(xdr, req, &hdr);
2504         encode_sequence(xdr, &args->seq_args, &hdr);
2505         encode_putfh(xdr, args->fh, &hdr);
2506         encode_write(xdr, args, &hdr);
2507         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2508         if (args->bitmask)
2509                 encode_getfattr(xdr, args->bitmask, &hdr);
2510         encode_nops(&hdr);
2511 }
2512
2513 /*
2514  *  a COMMIT request
2515  */
2516 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                 struct nfs_commitargs *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_commit(xdr, args, &hdr);
2527         encode_nops(&hdr);
2528 }
2529
2530 /*
2531  * FSINFO request
2532  */
2533 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2534                                 struct nfs4_fsinfo_arg *args)
2535 {
2536         struct compound_hdr hdr = {
2537                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2538         };
2539
2540         encode_compound_hdr(xdr, req, &hdr);
2541         encode_sequence(xdr, &args->seq_args, &hdr);
2542         encode_putfh(xdr, args->fh, &hdr);
2543         encode_fsinfo(xdr, args->bitmask, &hdr);
2544         encode_nops(&hdr);
2545 }
2546
2547 /*
2548  * a PATHCONF request
2549  */
2550 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2551                                   const struct nfs4_pathconf_arg *args)
2552 {
2553         struct compound_hdr hdr = {
2554                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2555         };
2556
2557         encode_compound_hdr(xdr, req, &hdr);
2558         encode_sequence(xdr, &args->seq_args, &hdr);
2559         encode_putfh(xdr, args->fh, &hdr);
2560         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2561                            &hdr);
2562         encode_nops(&hdr);
2563 }
2564
2565 /*
2566  * a STATFS request
2567  */
2568 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2569                                 const struct nfs4_statfs_arg *args)
2570 {
2571         struct compound_hdr hdr = {
2572                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2573         };
2574
2575         encode_compound_hdr(xdr, req, &hdr);
2576         encode_sequence(xdr, &args->seq_args, &hdr);
2577         encode_putfh(xdr, args->fh, &hdr);
2578         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2579                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2580         encode_nops(&hdr);
2581 }
2582
2583 /*
2584  * GETATTR_BITMAP request
2585  */
2586 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2587                                      struct xdr_stream *xdr,
2588                                      struct nfs4_server_caps_arg *args)
2589 {
2590         struct compound_hdr hdr = {
2591                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2592         };
2593
2594         encode_compound_hdr(xdr, req, &hdr);
2595         encode_sequence(xdr, &args->seq_args, &hdr);
2596         encode_putfh(xdr, args->fhandle, &hdr);
2597         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2598                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2599                            FATTR4_WORD0_LINK_SUPPORT|
2600                            FATTR4_WORD0_SYMLINK_SUPPORT|
2601                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2602         encode_nops(&hdr);
2603 }
2604
2605 /*
2606  * a RENEW request
2607  */
2608 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2609                                struct nfs_client *clp)
2610 {
2611         struct compound_hdr hdr = {
2612                 .nops   = 0,
2613         };
2614
2615         encode_compound_hdr(xdr, req, &hdr);
2616         encode_renew(xdr, clp->cl_clientid, &hdr);
2617         encode_nops(&hdr);
2618 }
2619
2620 /*
2621  * a SETCLIENTID request
2622  */
2623 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2624                                      struct xdr_stream *xdr,
2625                                      struct nfs4_setclientid *sc)
2626 {
2627         struct compound_hdr hdr = {
2628                 .nops   = 0,
2629         };
2630
2631         encode_compound_hdr(xdr, req, &hdr);
2632         encode_setclientid(xdr, sc, &hdr);
2633         encode_nops(&hdr);
2634 }
2635
2636 /*
2637  * a SETCLIENTID_CONFIRM request
2638  */
2639 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2640                                              struct xdr_stream *xdr,
2641                                              struct nfs4_setclientid_res *arg)
2642 {
2643         struct compound_hdr hdr = {
2644                 .nops   = 0,
2645         };
2646
2647         encode_compound_hdr(xdr, req, &hdr);
2648         encode_setclientid_confirm(xdr, arg, &hdr);
2649         encode_nops(&hdr);
2650 }
2651
2652 /*
2653  * DELEGRETURN request
2654  */
2655 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2656                                      struct xdr_stream *xdr,
2657                                      const struct nfs4_delegreturnargs *args)
2658 {
2659         struct compound_hdr hdr = {
2660                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661         };
2662
2663         encode_compound_hdr(xdr, req, &hdr);
2664         encode_sequence(xdr, &args->seq_args, &hdr);
2665         encode_putfh(xdr, args->fhandle, &hdr);
2666         encode_getfattr(xdr, args->bitmask, &hdr);
2667         encode_delegreturn(xdr, args->stateid, &hdr);
2668         encode_nops(&hdr);
2669 }
2670
2671 /*
2672  * Encode FS_LOCATIONS request
2673  */
2674 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2675                                       struct xdr_stream *xdr,
2676                                       struct nfs4_fs_locations_arg *args)
2677 {
2678         struct compound_hdr hdr = {
2679                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2680         };
2681         uint32_t replen;
2682
2683         encode_compound_hdr(xdr, req, &hdr);
2684         encode_sequence(xdr, &args->seq_args, &hdr);
2685         if (args->migration) {
2686                 encode_putfh(xdr, args->fh, &hdr);
2687                 replen = hdr.replen;
2688                 encode_fs_locations(xdr, args->bitmask, &hdr);
2689                 if (args->renew)
2690                         encode_renew(xdr, args->clientid, &hdr);
2691         } else {
2692                 encode_putfh(xdr, args->dir_fh, &hdr);
2693                 encode_lookup(xdr, args->name, &hdr);
2694                 replen = hdr.replen;
2695                 encode_fs_locations(xdr, args->bitmask, &hdr);
2696         }
2697
2698         /* Set up reply kvec to capture returned fs_locations array. */
2699         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2700                         0, PAGE_SIZE);
2701         encode_nops(&hdr);
2702 }
2703
2704 /*
2705  * Encode SECINFO request
2706  */
2707 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2708                                 struct xdr_stream *xdr,
2709                                 struct nfs4_secinfo_arg *args)
2710 {
2711         struct compound_hdr hdr = {
2712                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2713         };
2714
2715         encode_compound_hdr(xdr, req, &hdr);
2716         encode_sequence(xdr, &args->seq_args, &hdr);
2717         encode_putfh(xdr, args->dir_fh, &hdr);
2718         encode_secinfo(xdr, args->name, &hdr);
2719         encode_nops(&hdr);
2720 }
2721
2722 /*
2723  * Encode FSID_PRESENT request
2724  */
2725 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2726                                       struct xdr_stream *xdr,
2727                                       struct nfs4_fsid_present_arg *args)
2728 {
2729         struct compound_hdr hdr = {
2730                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2731         };
2732
2733         encode_compound_hdr(xdr, req, &hdr);
2734         encode_sequence(xdr, &args->seq_args, &hdr);
2735         encode_putfh(xdr, args->fh, &hdr);
2736         encode_getfh(xdr, &hdr);
2737         if (args->renew)
2738                 encode_renew(xdr, args->clientid, &hdr);
2739         encode_nops(&hdr);
2740 }
2741
2742 #if defined(CONFIG_NFS_V4_1)
2743 /*
2744  * BIND_CONN_TO_SESSION request
2745  */
2746 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2747                                 struct xdr_stream *xdr,
2748                                 struct nfs_client *clp)
2749 {
2750         struct compound_hdr hdr = {
2751                 .minorversion = clp->cl_mvops->minor_version,
2752         };
2753
2754         encode_compound_hdr(xdr, req, &hdr);
2755         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2756         encode_nops(&hdr);
2757 }
2758
2759 /*
2760  * EXCHANGE_ID request
2761  */
2762 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2763                                      struct xdr_stream *xdr,
2764                                      struct nfs41_exchange_id_args *args)
2765 {
2766         struct compound_hdr hdr = {
2767                 .minorversion = args->client->cl_mvops->minor_version,
2768         };
2769
2770         encode_compound_hdr(xdr, req, &hdr);
2771         encode_exchange_id(xdr, args, &hdr);
2772         encode_nops(&hdr);
2773 }
2774
2775 /*
2776  * a CREATE_SESSION request
2777  */
2778 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2779                                         struct xdr_stream *xdr,
2780                                         struct nfs41_create_session_args *args)
2781 {
2782         struct compound_hdr hdr = {
2783                 .minorversion = args->client->cl_mvops->minor_version,
2784         };
2785
2786         encode_compound_hdr(xdr, req, &hdr);
2787         encode_create_session(xdr, args, &hdr);
2788         encode_nops(&hdr);
2789 }
2790
2791 /*
2792  * a DESTROY_SESSION request
2793  */
2794 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2795                                          struct xdr_stream *xdr,
2796                                          struct nfs4_session *session)
2797 {
2798         struct compound_hdr hdr = {
2799                 .minorversion = session->clp->cl_mvops->minor_version,
2800         };
2801
2802         encode_compound_hdr(xdr, req, &hdr);
2803         encode_destroy_session(xdr, session, &hdr);
2804         encode_nops(&hdr);
2805 }
2806
2807 /*
2808  * a DESTROY_CLIENTID request
2809  */
2810 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2811                                          struct xdr_stream *xdr,
2812                                          struct nfs_client *clp)
2813 {
2814         struct compound_hdr hdr = {
2815                 .minorversion = clp->cl_mvops->minor_version,
2816         };
2817
2818         encode_compound_hdr(xdr, req, &hdr);
2819         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2820         encode_nops(&hdr);
2821 }
2822
2823 /*
2824  * a SEQUENCE request
2825  */
2826 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2827                                   struct nfs4_sequence_args *args)
2828 {
2829         struct compound_hdr hdr = {
2830                 .minorversion = nfs4_xdr_minorversion(args),
2831         };
2832
2833         encode_compound_hdr(xdr, req, &hdr);
2834         encode_sequence(xdr, args, &hdr);
2835         encode_nops(&hdr);
2836 }
2837
2838 /*
2839  * a GET_LEASE_TIME request
2840  */
2841 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2842                                         struct xdr_stream *xdr,
2843                                         struct nfs4_get_lease_time_args *args)
2844 {
2845         struct compound_hdr hdr = {
2846                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2847         };
2848         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2849
2850         encode_compound_hdr(xdr, req, &hdr);
2851         encode_sequence(xdr, &args->la_seq_args, &hdr);
2852         encode_putrootfh(xdr, &hdr);
2853         encode_fsinfo(xdr, lease_bitmap, &hdr);
2854         encode_nops(&hdr);
2855 }
2856
2857 /*
2858  * a RECLAIM_COMPLETE request
2859  */
2860 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2861                                           struct xdr_stream *xdr,
2862                                 struct nfs41_reclaim_complete_args *args)
2863 {
2864         struct compound_hdr hdr = {
2865                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2866         };
2867
2868         encode_compound_hdr(xdr, req, &hdr);
2869         encode_sequence(xdr, &args->seq_args, &hdr);
2870         encode_reclaim_complete(xdr, args, &hdr);
2871         encode_nops(&hdr);
2872 }
2873
2874 /*
2875  * Encode GETDEVICEINFO request
2876  */
2877 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2878                                        struct xdr_stream *xdr,
2879                                        struct nfs4_getdeviceinfo_args *args)
2880 {
2881         struct compound_hdr hdr = {
2882                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2883         };
2884
2885         encode_compound_hdr(xdr, req, &hdr);
2886         encode_sequence(xdr, &args->seq_args, &hdr);
2887         encode_getdeviceinfo(xdr, args, &hdr);
2888
2889         /* set up reply kvec. Subtract notification bitmap max size (2)
2890          * so that notification bitmap is put in xdr_buf tail */
2891         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2892                          args->pdev->pages, args->pdev->pgbase,
2893                          args->pdev->pglen);
2894
2895         encode_nops(&hdr);
2896 }
2897
2898 /*
2899  *  Encode LAYOUTGET request
2900  */
2901 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2902                                    struct xdr_stream *xdr,
2903                                    struct nfs4_layoutget_args *args)
2904 {
2905         struct compound_hdr hdr = {
2906                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2907         };
2908
2909         encode_compound_hdr(xdr, req, &hdr);
2910         encode_sequence(xdr, &args->seq_args, &hdr);
2911         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2912         encode_layoutget(xdr, args, &hdr);
2913
2914         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2915             args->layout.pages, 0, args->layout.pglen);
2916
2917         encode_nops(&hdr);
2918 }
2919
2920 /*
2921  *  Encode LAYOUTCOMMIT request
2922  */
2923 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2924                                       struct xdr_stream *xdr,
2925                                       struct nfs4_layoutcommit_args *args)
2926 {
2927         struct nfs4_layoutcommit_data *data =
2928                 container_of(args, struct nfs4_layoutcommit_data, args);
2929         struct compound_hdr hdr = {
2930                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2931         };
2932
2933         encode_compound_hdr(xdr, req, &hdr);
2934         encode_sequence(xdr, &args->seq_args, &hdr);
2935         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2936         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2937         encode_getfattr(xdr, args->bitmask, &hdr);
2938         encode_nops(&hdr);
2939 }
2940
2941 /*
2942  * Encode LAYOUTRETURN request
2943  */
2944 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2945                                       struct xdr_stream *xdr,
2946                                       struct nfs4_layoutreturn_args *args)
2947 {
2948         struct compound_hdr hdr = {
2949                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950         };
2951
2952         encode_compound_hdr(xdr, req, &hdr);
2953         encode_sequence(xdr, &args->seq_args, &hdr);
2954         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2955         encode_layoutreturn(xdr, args, &hdr);
2956         encode_nops(&hdr);
2957 }
2958
2959 /*
2960  * Encode SECINFO_NO_NAME request
2961  */
2962 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2963                                         struct xdr_stream *xdr,
2964                                         struct nfs41_secinfo_no_name_args *args)
2965 {
2966         struct compound_hdr hdr = {
2967                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2968         };
2969
2970         encode_compound_hdr(xdr, req, &hdr);
2971         encode_sequence(xdr, &args->seq_args, &hdr);
2972         encode_putrootfh(xdr, &hdr);
2973         encode_secinfo_no_name(xdr, args, &hdr);
2974         encode_nops(&hdr);
2975         return 0;
2976 }
2977
2978 /*
2979  *  Encode TEST_STATEID request
2980  */
2981 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2982                                       struct xdr_stream *xdr,
2983                                       struct nfs41_test_stateid_args *args)
2984 {
2985         struct compound_hdr hdr = {
2986                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2987         };
2988
2989         encode_compound_hdr(xdr, req, &hdr);
2990         encode_sequence(xdr, &args->seq_args, &hdr);
2991         encode_test_stateid(xdr, args, &hdr);
2992         encode_nops(&hdr);
2993 }
2994
2995 /*
2996  *  Encode FREE_STATEID request
2997  */
2998 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2999                                      struct xdr_stream *xdr,
3000                                      struct nfs41_free_stateid_args *args)
3001 {
3002         struct compound_hdr hdr = {
3003                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3004         };
3005
3006         encode_compound_hdr(xdr, req, &hdr);
3007         encode_sequence(xdr, &args->seq_args, &hdr);
3008         encode_free_stateid(xdr, args, &hdr);
3009         encode_nops(&hdr);
3010 }
3011 #endif /* CONFIG_NFS_V4_1 */
3012
3013 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3014 {
3015         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3016                 "Remaining buffer length is %tu words.\n",
3017                 func, xdr->end - xdr->p);
3018 }
3019
3020 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3021 {
3022         __be32 *p;
3023
3024         p = xdr_inline_decode(xdr, 4);
3025         if (unlikely(!p))
3026                 goto out_overflow;
3027         *len = be32_to_cpup(p);
3028         p = xdr_inline_decode(xdr, *len);
3029         if (unlikely(!p))
3030                 goto out_overflow;
3031         *string = (char *)p;
3032         return 0;
3033 out_overflow:
3034         print_overflow_msg(__func__, xdr);
3035         return -EIO;
3036 }
3037
3038 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3039 {
3040         __be32 *p;
3041
3042         p = xdr_inline_decode(xdr, 8);
3043         if (unlikely(!p))
3044                 goto out_overflow;
3045         hdr->status = be32_to_cpup(p++);
3046         hdr->taglen = be32_to_cpup(p);
3047
3048         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3049         if (unlikely(!p))
3050                 goto out_overflow;
3051         hdr->tag = (char *)p;
3052         p += XDR_QUADLEN(hdr->taglen);
3053         hdr->nops = be32_to_cpup(p);
3054         if (unlikely(hdr->nops < 1))
3055                 return nfs4_stat_to_errno(hdr->status);
3056         return 0;
3057 out_overflow:
3058         print_overflow_msg(__func__, xdr);
3059         return -EIO;
3060 }
3061
3062 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3063                 int *nfs_retval)
3064 {
3065         __be32 *p;
3066         uint32_t opnum;
3067         int32_t nfserr;
3068
3069         p = xdr_inline_decode(xdr, 8);
3070         if (unlikely(!p))
3071                 goto out_overflow;
3072         opnum = be32_to_cpup(p++);
3073         if (unlikely(opnum != expected))
3074                 goto out_bad_operation;
3075         nfserr = be32_to_cpup(p);
3076         if (nfserr == NFS_OK)
3077                 *nfs_retval = 0;
3078         else
3079                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3080         return true;
3081 out_bad_operation:
3082         dprintk("nfs: Server returned operation"
3083                 " %d but we issued a request for %d\n",
3084                         opnum, expected);
3085         *nfs_retval = -EREMOTEIO;
3086         return false;
3087 out_overflow:
3088         print_overflow_msg(__func__, xdr);
3089         *nfs_retval = -EIO;
3090         return false;
3091 }
3092
3093 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3094 {
3095         int retval;
3096
3097         __decode_op_hdr(xdr, expected, &retval);
3098         return retval;
3099 }
3100
3101 /* Dummy routine */
3102 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3103 {
3104         __be32 *p;
3105         unsigned int strlen;
3106         char *str;
3107
3108         p = xdr_inline_decode(xdr, 12);
3109         if (likely(p))
3110                 return decode_opaque_inline(xdr, &strlen, &str);
3111         print_overflow_msg(__func__, xdr);
3112         return -EIO;
3113 }
3114
3115 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3116 {
3117         uint32_t bmlen;
3118         __be32 *p;
3119
3120         p = xdr_inline_decode(xdr, 4);
3121         if (unlikely(!p))
3122                 goto out_overflow;
3123         bmlen = be32_to_cpup(p);
3124
3125         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3126         p = xdr_inline_decode(xdr, (bmlen << 2));
3127         if (unlikely(!p))
3128                 goto out_overflow;
3129         if (bmlen > 0) {
3130                 bitmap[0] = be32_to_cpup(p++);
3131                 if (bmlen > 1) {
3132                         bitmap[1] = be32_to_cpup(p++);
3133                         if (bmlen > 2)
3134                                 bitmap[2] = be32_to_cpup(p);
3135                 }
3136         }
3137         return 0;
3138 out_overflow:
3139         print_overflow_msg(__func__, xdr);
3140         return -EIO;
3141 }
3142
3143 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3144 {
3145         __be32 *p;
3146
3147         p = xdr_inline_decode(xdr, 4);
3148         if (unlikely(!p))
3149                 goto out_overflow;
3150         *attrlen = be32_to_cpup(p);
3151         *savep = xdr_stream_pos(xdr);
3152         return 0;
3153 out_overflow:
3154         print_overflow_msg(__func__, xdr);
3155         return -EIO;
3156 }
3157
3158 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3159 {
3160         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3161                 int ret;
3162                 ret = decode_attr_bitmap(xdr, bitmask);
3163                 if (unlikely(ret < 0))
3164                         return ret;
3165                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3166         } else
3167                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3168         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3169                 bitmask[0], bitmask[1], bitmask[2]);
3170         return 0;
3171 }
3172
3173 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3174 {
3175         __be32 *p;
3176         int ret = 0;
3177
3178         *type = 0;
3179         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3180                 return -EIO;
3181         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3182                 p = xdr_inline_decode(xdr, 4);
3183                 if (unlikely(!p))
3184                         goto out_overflow;
3185                 *type = be32_to_cpup(p);
3186                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3187                         dprintk("%s: bad type %d\n", __func__, *type);
3188                         return -EIO;
3189                 }
3190                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3191                 ret = NFS_ATTR_FATTR_TYPE;
3192         }
3193         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3194         return ret;
3195 out_overflow:
3196         print_overflow_msg(__func__, xdr);
3197         return -EIO;
3198 }
3199
3200 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3201                                       uint32_t *bitmap, uint32_t *type)
3202 {
3203         __be32 *p;
3204
3205         *type = 0;
3206         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3207                 return -EIO;
3208         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3209                 p = xdr_inline_decode(xdr, 4);
3210                 if (unlikely(!p))
3211                         goto out_overflow;
3212                 *type = be32_to_cpup(p);
3213                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3214         }
3215         dprintk("%s: expire type=0x%x\n", __func__, *type);
3216         return 0;
3217 out_overflow:
3218         print_overflow_msg(__func__, xdr);
3219         return -EIO;
3220 }
3221
3222 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3223 {
3224         __be32 *p;
3225         int ret = 0;
3226
3227         *change = 0;
3228         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3229                 return -EIO;
3230         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3231                 p = xdr_inline_decode(xdr, 8);
3232                 if (unlikely(!p))
3233                         goto out_overflow;
3234                 xdr_decode_hyper(p, change);
3235                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3236                 ret = NFS_ATTR_FATTR_CHANGE;
3237         }
3238         dprintk("%s: change attribute=%Lu\n", __func__,
3239                         (unsigned long long)*change);
3240         return ret;
3241 out_overflow:
3242         print_overflow_msg(__func__, xdr);
3243         return -EIO;
3244 }
3245
3246 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3247 {
3248         __be32 *p;
3249         int ret = 0;
3250
3251         *size = 0;
3252         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3253                 return -EIO;
3254         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3255                 p = xdr_inline_decode(xdr, 8);
3256                 if (unlikely(!p))
3257                         goto out_overflow;
3258                 xdr_decode_hyper(p, size);
3259                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3260                 ret = NFS_ATTR_FATTR_SIZE;
3261         }
3262         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3263         return ret;
3264 out_overflow:
3265         print_overflow_msg(__func__, xdr);
3266         return -EIO;
3267 }
3268
3269 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3270 {
3271         __be32 *p;
3272
3273         *res = 0;
3274         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3275                 return -EIO;
3276         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3277                 p = xdr_inline_decode(xdr, 4);
3278                 if (unlikely(!p))
3279                         goto out_overflow;
3280                 *res = be32_to_cpup(p);
3281                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3282         }
3283         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3284         return 0;
3285 out_overflow:
3286         print_overflow_msg(__func__, xdr);
3287         return -EIO;
3288 }
3289
3290 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3291 {
3292         __be32 *p;
3293
3294         *res = 0;
3295         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3296                 return -EIO;
3297         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3298                 p = xdr_inline_decode(xdr, 4);
3299                 if (unlikely(!p))
3300                         goto out_overflow;
3301                 *res = be32_to_cpup(p);
3302                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3303         }
3304         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3305         return 0;
3306 out_overflow:
3307         print_overflow_msg(__func__, xdr);
3308         return -EIO;
3309 }
3310
3311 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3312 {
3313         __be32 *p;
3314         int ret = 0;
3315
3316         fsid->major = 0;
3317         fsid->minor = 0;
3318         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3319                 return -EIO;
3320         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3321                 p = xdr_inline_decode(xdr, 16);
3322                 if (unlikely(!p))
3323                         goto out_overflow;
3324                 p = xdr_decode_hyper(p, &fsid->major);
3325                 xdr_decode_hyper(p, &fsid->minor);
3326                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3327                 ret = NFS_ATTR_FATTR_FSID;
3328         }
3329         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3330                         (unsigned long long)fsid->major,
3331                         (unsigned long long)fsid->minor);
3332         return ret;
3333 out_overflow:
3334         print_overflow_msg(__func__, xdr);
3335         return -EIO;
3336 }
3337
3338 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3339 {
3340         __be32 *p;
3341
3342         *res = 60;
3343         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3344                 return -EIO;
3345         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3346                 p = xdr_inline_decode(xdr, 4);
3347                 if (unlikely(!p))
3348                         goto out_overflow;
3349                 *res = be32_to_cpup(p);
3350                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3351         }
3352         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3353         return 0;
3354 out_overflow:
3355         print_overflow_msg(__func__, xdr);
3356         return -EIO;
3357 }
3358
3359 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3360 {
3361         __be32 *p;
3362
3363         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3364                 return -EIO;
3365         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3366                 p = xdr_inline_decode(xdr, 4);
3367                 if (unlikely(!p))
3368                         goto out_overflow;
3369                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3370                 *res = -be32_to_cpup(p);
3371         }
3372         return 0;
3373 out_overflow:
3374         print_overflow_msg(__func__, xdr);
3375         return -EIO;
3376 }
3377
3378 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3379 {
3380         __be32 *p;
3381         int len;
3382
3383         if (fh != NULL)
3384                 memset(fh, 0, sizeof(*fh));
3385
3386         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3387                 return -EIO;
3388         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3389                 p = xdr_inline_decode(xdr, 4);
3390                 if (unlikely(!p))
3391                         goto out_overflow;
3392                 len = be32_to_cpup(p);
3393                 if (len > NFS4_FHSIZE)
3394                         return -EIO;
3395                 p = xdr_inline_decode(xdr, len);
3396                 if (unlikely(!p))
3397                         goto out_overflow;
3398                 if (fh != NULL) {
3399                         memcpy(fh->data, p, len);
3400                         fh->size = len;
3401                 }
3402                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3403         }
3404         return 0;
3405 out_overflow:
3406         print_overflow_msg(__func__, xdr);
3407         return -EIO;
3408 }
3409
3410 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3411 {
3412         __be32 *p;
3413
3414         *res = 0;
3415         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3416                 return -EIO;
3417         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3418                 p = xdr_inline_decode(xdr, 4);
3419                 if (unlikely(!p))
3420                         goto out_overflow;
3421                 *res = be32_to_cpup(p);
3422                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3423         }
3424         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3425         return 0;
3426 out_overflow:
3427         print_overflow_msg(__func__, xdr);
3428         return -EIO;
3429 }
3430
3431 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3432 {
3433         __be32 *p;
3434         int ret = 0;
3435
3436         *fileid = 0;
3437         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3438                 return -EIO;
3439         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3440                 p = xdr_inline_decode(xdr, 8);
3441                 if (unlikely(!p))
3442                         goto out_overflow;
3443                 xdr_decode_hyper(p, fileid);
3444                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3445                 ret = NFS_ATTR_FATTR_FILEID;
3446         }
3447         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3448         return ret;
3449 out_overflow:
3450         print_overflow_msg(__func__, xdr);
3451         return -EIO;
3452 }
3453
3454 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3455 {
3456         __be32 *p;
3457         int ret = 0;
3458
3459         *fileid = 0;
3460         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3461                 return -EIO;
3462         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3463                 p = xdr_inline_decode(xdr, 8);
3464                 if (unlikely(!p))
3465                         goto out_overflow;
3466                 xdr_decode_hyper(p, fileid);
3467                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3468                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3469         }
3470         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3471         return ret;
3472 out_overflow:
3473         print_overflow_msg(__func__, xdr);
3474         return -EIO;
3475 }
3476
3477 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3478 {
3479         __be32 *p;
3480         int status = 0;
3481
3482         *res = 0;
3483         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3484                 return -EIO;
3485         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3486                 p = xdr_inline_decode(xdr, 8);
3487                 if (unlikely(!p))
3488                         goto out_overflow;
3489                 xdr_decode_hyper(p, res);
3490                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3491         }
3492         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3493         return status;
3494 out_overflow:
3495         print_overflow_msg(__func__, xdr);
3496         return -EIO;
3497 }
3498
3499 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3500 {
3501         __be32 *p;
3502         int status = 0;
3503
3504         *res = 0;
3505         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3506                 return -EIO;
3507         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3508                 p = xdr_inline_decode(xdr, 8);
3509                 if (unlikely(!p))
3510                         goto out_overflow;
3511                 xdr_decode_hyper(p, res);
3512                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3513         }
3514         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3515         return status;
3516 out_overflow:
3517         print_overflow_msg(__func__, xdr);
3518         return -EIO;
3519 }
3520
3521 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3522 {
3523         __be32 *p;
3524         int status = 0;
3525
3526         *res = 0;
3527         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3528                 return -EIO;
3529         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3530                 p = xdr_inline_decode(xdr, 8);
3531                 if (unlikely(!p))
3532                         goto out_overflow;
3533                 xdr_decode_hyper(p, res);
3534                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3535         }
3536         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3537         return status;
3538 out_overflow:
3539         print_overflow_msg(__func__, xdr);
3540         return -EIO;
3541 }
3542
3543 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3544 {
3545         u32 n;
3546         __be32 *p;
3547         int status = 0;
3548
3549         p = xdr_inline_decode(xdr, 4);
3550         if (unlikely(!p))
3551                 goto out_overflow;
3552         n = be32_to_cpup(p);
3553         if (n == 0)
3554                 goto root_path;
3555         dprintk("pathname4: ");
3556         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3557                 dprintk("cannot parse %d components in path\n", n);
3558                 goto out_eio;
3559         }
3560         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3561                 struct nfs4_string *component = &path->components[path->ncomponents];
3562                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3563                 if (unlikely(status != 0))
3564                         goto out_eio;
3565                 ifdebug (XDR)
3566                         pr_cont("%s%.*s ",
3567                                 (path->ncomponents != n ? "/ " : ""),
3568                                 component->len, component->data);
3569         }
3570 out:
3571         return status;
3572 root_path:
3573 /* a root pathname is sent as a zero component4 */
3574         path->ncomponents = 1;
3575         path->components[0].len=0;
3576         path->components[0].data=NULL;
3577         dprintk("pathname4: /\n");
3578         goto out;
3579 out_eio:
3580         dprintk(" status %d", status);
3581         status = -EIO;
3582         goto out;
3583 out_overflow:
3584         print_overflow_msg(__func__, xdr);
3585         return -EIO;
3586 }
3587
3588 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3589 {
3590         int n;
3591         __be32 *p;
3592         int status = -EIO;
3593
3594         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3595                 goto out;
3596         status = 0;
3597         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3598                 goto out;
3599         status = -EIO;
3600         /* Ignore borken servers that return unrequested attrs */
3601         if (unlikely(res == NULL))
3602                 goto out;
3603         dprintk("%s: fsroot:\n", __func__);
3604         status = decode_pathname(xdr, &res->fs_path);
3605         if (unlikely(status != 0))
3606                 goto out;
3607         p = xdr_inline_decode(xdr, 4);
3608         if (unlikely(!p))
3609                 goto out_overflow;
3610         n = be32_to_cpup(p);
3611         if (n <= 0)
3612                 goto out_eio;
3613         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3614                 u32 m;
3615                 struct nfs4_fs_location *loc;
3616
3617                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3618                         break;
3619                 loc = &res->locations[res->nlocations];
3620                 p = xdr_inline_decode(xdr, 4);
3621                 if (unlikely(!p))
3622                         goto out_overflow;
3623                 m = be32_to_cpup(p);
3624
3625                 dprintk("%s: servers:\n", __func__);
3626                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3627                         struct nfs4_string *server;
3628
3629                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3630                                 unsigned int i;
3631                                 dprintk("%s: using first %u of %u servers "
3632                                         "returned for location %u\n",
3633                                                 __func__,
3634                                                 NFS4_FS_LOCATION_MAXSERVERS,
3635                                                 m, res->nlocations);
3636                                 for (i = loc->nservers; i < m; i++) {
3637                                         unsigned int len;
3638                                         char *data;
3639                                         status = decode_opaque_inline(xdr, &len, &data);
3640                                         if (unlikely(status != 0))
3641                                                 goto out_eio;
3642                                 }
3643                                 break;
3644                         }
3645                         server = &loc->servers[loc->nservers];
3646                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3647                         if (unlikely(status != 0))
3648                                 goto out_eio;
3649                         dprintk("%s ", server->data);
3650                 }
3651                 status = decode_pathname(xdr, &loc->rootpath);
3652                 if (unlikely(status != 0))
3653                         goto out_eio;
3654         }
3655         if (res->nlocations != 0)
3656                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3657 out:
3658         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3659         return status;
3660 out_overflow:
3661         print_overflow_msg(__func__, xdr);
3662 out_eio:
3663         status = -EIO;
3664         goto out;
3665 }
3666
3667 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3668 {
3669         __be32 *p;
3670         int status = 0;
3671
3672         *res = 0;
3673         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3674                 return -EIO;
3675         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3676                 p = xdr_inline_decode(xdr, 8);
3677                 if (unlikely(!p))
3678                         goto out_overflow;
3679                 xdr_decode_hyper(p, res);
3680                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3681         }
3682         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3683         return status;
3684 out_overflow:
3685         print_overflow_msg(__func__, xdr);
3686         return -EIO;
3687 }
3688
3689 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3690 {
3691         __be32 *p;
3692         int status = 0;
3693
3694         *maxlink = 1;
3695         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3696                 return -EIO;
3697         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3698                 p = xdr_inline_decode(xdr, 4);
3699                 if (unlikely(!p))
3700                         goto out_overflow;
3701                 *maxlink = be32_to_cpup(p);
3702                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3703         }
3704         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3705         return status;
3706 out_overflow:
3707         print_overflow_msg(__func__, xdr);
3708         return -EIO;
3709 }
3710
3711 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3712 {
3713         __be32 *p;
3714         int status = 0;
3715
3716         *maxname = 1024;
3717         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3718                 return -EIO;
3719         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3720                 p = xdr_inline_decode(xdr, 4);
3721                 if (unlikely(!p))
3722                         goto out_overflow;
3723                 *maxname = be32_to_cpup(p);
3724                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3725         }
3726         dprintk("%s: maxname=%u\n", __func__, *maxname);
3727         return status;
3728 out_overflow:
3729         print_overflow_msg(__func__, xdr);
3730         return -EIO;
3731 }
3732
3733 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3734 {
3735         __be32 *p;
3736         int status = 0;
3737
3738         *res = 1024;
3739         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3740                 return -EIO;
3741         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3742                 uint64_t maxread;
3743                 p = xdr_inline_decode(xdr, 8);
3744                 if (unlikely(!p))
3745                         goto out_overflow;
3746                 xdr_decode_hyper(p, &maxread);
3747                 if (maxread > 0x7FFFFFFF)
3748                         maxread = 0x7FFFFFFF;
3749                 *res = (uint32_t)maxread;
3750                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3751         }
3752         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3753         return status;
3754 out_overflow:
3755         print_overflow_msg(__func__, xdr);
3756         return -EIO;
3757 }
3758
3759 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3760 {
3761         __be32 *p;
3762         int status = 0;
3763
3764         *res = 1024;
3765         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3766                 return -EIO;
3767         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3768                 uint64_t maxwrite;
3769                 p = xdr_inline_decode(xdr, 8);
3770                 if (unlikely(!p))
3771                         goto out_overflow;
3772                 xdr_decode_hyper(p, &maxwrite);
3773                 if (maxwrite > 0x7FFFFFFF)
3774                         maxwrite = 0x7FFFFFFF;
3775                 *res = (uint32_t)maxwrite;
3776                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3777         }
3778         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3779         return status;
3780 out_overflow:
3781         print_overflow_msg(__func__, xdr);
3782         return -EIO;
3783 }
3784
3785 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3786 {
3787         uint32_t tmp;
3788         __be32 *p;
3789         int ret = 0;
3790
3791         *mode = 0;
3792         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3793                 return -EIO;
3794         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3795                 p = xdr_inline_decode(xdr, 4);
3796                 if (unlikely(!p))
3797                         goto out_overflow;
3798                 tmp = be32_to_cpup(p);
3799                 *mode = tmp & ~S_IFMT;
3800                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3801                 ret = NFS_ATTR_FATTR_MODE;
3802         }
3803         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3804         return ret;
3805 out_overflow:
3806         print_overflow_msg(__func__, xdr);
3807         return -EIO;
3808 }
3809
3810 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3811 {
3812         __be32 *p;
3813         int ret = 0;
3814
3815         *nlink = 1;
3816         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3817                 return -EIO;
3818         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3819                 p = xdr_inline_decode(xdr, 4);
3820                 if (unlikely(!p))
3821                         goto out_overflow;
3822                 *nlink = be32_to_cpup(p);
3823                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3824                 ret = NFS_ATTR_FATTR_NLINK;
3825         }
3826         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3827         return ret;
3828 out_overflow:
3829         print_overflow_msg(__func__, xdr);
3830         return -EIO;
3831 }
3832
3833 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3834                 const struct nfs_server *server, kuid_t *uid,
3835                 struct nfs4_string *owner_name)
3836 {
3837         uint32_t len;
3838         __be32 *p;
3839         int ret = 0;
3840
3841         *uid = make_kuid(&init_user_ns, -2);
3842         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3843                 return -EIO;
3844         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3845                 p = xdr_inline_decode(xdr, 4);
3846                 if (unlikely(!p))
3847                         goto out_overflow;
3848                 len = be32_to_cpup(p);
3849                 p = xdr_inline_decode(xdr, len);
3850                 if (unlikely(!p))
3851                         goto out_overflow;
3852                 if (owner_name != NULL) {
3853                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3854                         if (owner_name->data != NULL) {
3855                                 owner_name->len = len;
3856                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3857                         }
3858                 } else if (len < XDR_MAX_NETOBJ) {
3859                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3860                                 ret = NFS_ATTR_FATTR_OWNER;
3861                         else
3862                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3863                                                 __func__);
3864                 } else
3865                         dprintk("%s: name too long (%u)!\n",
3866                                         __func__, len);
3867                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3868         }
3869         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3870         return ret;
3871 out_overflow:
3872         print_overflow_msg(__func__, xdr);
3873         return -EIO;
3874 }
3875
3876 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3877                 const struct nfs_server *server, kgid_t *gid,
3878                 struct nfs4_string *group_name)
3879 {
3880         uint32_t len;
3881         __be32 *p;
3882         int ret = 0;
3883
3884         *gid = make_kgid(&init_user_ns, -2);
3885         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3886                 return -EIO;
3887         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3888                 p = xdr_inline_decode(xdr, 4);
3889                 if (unlikely(!p))
3890                         goto out_overflow;
3891                 len = be32_to_cpup(p);
3892                 p = xdr_inline_decode(xdr, len);
3893                 if (unlikely(!p))
3894                         goto out_overflow;
3895                 if (group_name != NULL) {
3896                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3897                         if (group_name->data != NULL) {
3898                                 group_name->len = len;
3899                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3900                         }
3901                 } else if (len < XDR_MAX_NETOBJ) {
3902                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3903                                 ret = NFS_ATTR_FATTR_GROUP;
3904                         else
3905                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3906                                                 __func__);
3907                 } else
3908                         dprintk("%s: name too long (%u)!\n",
3909                                         __func__, len);
3910                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3911         }
3912         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3913         return ret;
3914 out_overflow:
3915         print_overflow_msg(__func__, xdr);
3916         return -EIO;
3917 }
3918
3919 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3920 {
3921         uint32_t major = 0, minor = 0;
3922         __be32 *p;
3923         int ret = 0;
3924
3925         *rdev = MKDEV(0,0);
3926         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3927                 return -EIO;
3928         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3929                 dev_t tmp;
3930
3931                 p = xdr_inline_decode(xdr, 8);
3932                 if (unlikely(!p))
3933                         goto out_overflow;
3934                 major = be32_to_cpup(p++);
3935                 minor = be32_to_cpup(p);
3936                 tmp = MKDEV(major, minor);
3937                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3938                         *rdev = tmp;
3939                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3940                 ret = NFS_ATTR_FATTR_RDEV;
3941         }
3942         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3943         return ret;
3944 out_overflow:
3945         print_overflow_msg(__func__, xdr);
3946         return -EIO;
3947 }
3948
3949 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3950 {
3951         __be32 *p;
3952         int status = 0;
3953
3954         *res = 0;
3955         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3956                 return -EIO;
3957         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3958                 p = xdr_inline_decode(xdr, 8);
3959                 if (unlikely(!p))
3960                         goto out_overflow;
3961                 xdr_decode_hyper(p, res);
3962                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3963         }
3964         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3965         return status;
3966 out_overflow:
3967         print_overflow_msg(__func__, xdr);
3968         return -EIO;
3969 }
3970
3971 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3972 {
3973         __be32 *p;
3974         int status = 0;
3975
3976         *res = 0;
3977         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3978                 return -EIO;
3979         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3980                 p = xdr_inline_decode(xdr, 8);
3981                 if (unlikely(!p))
3982                         goto out_overflow;
3983                 xdr_decode_hyper(p, res);
3984                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3985         }
3986         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3987         return status;
3988 out_overflow:
3989         print_overflow_msg(__func__, xdr);
3990         return -EIO;
3991 }
3992
3993 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3994 {
3995         __be32 *p;
3996         int status = 0;
3997
3998         *res = 0;
3999         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4000                 return -EIO;
4001         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4002                 p = xdr_inline_decode(xdr, 8);
4003                 if (unlikely(!p))
4004                         goto out_overflow;
4005                 xdr_decode_hyper(p, res);
4006                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4007         }
4008         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4009         return status;
4010 out_overflow:
4011         print_overflow_msg(__func__, xdr);
4012         return -EIO;
4013 }
4014
4015 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4016 {
4017         __be32 *p;
4018         int ret = 0;
4019
4020         *used = 0;
4021         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4022                 return -EIO;
4023         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4024                 p = xdr_inline_decode(xdr, 8);
4025                 if (unlikely(!p))
4026                         goto out_overflow;
4027                 xdr_decode_hyper(p, used);
4028                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4029                 ret = NFS_ATTR_FATTR_SPACE_USED;
4030         }
4031         dprintk("%s: space used=%Lu\n", __func__,
4032                         (unsigned long long)*used);
4033         return ret;
4034 out_overflow:
4035         print_overflow_msg(__func__, xdr);
4036         return -EIO;
4037 }
4038
4039 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4040 {
4041         __be32 *p;
4042         uint64_t sec;
4043         uint32_t nsec;
4044
4045         p = xdr_inline_decode(xdr, 12);
4046         if (unlikely(!p))
4047                 goto out_overflow;
4048         p = xdr_decode_hyper(p, &sec);
4049         nsec = be32_to_cpup(p);
4050         time->tv_sec = (time_t)sec;
4051         time->tv_nsec = (long)nsec;
4052         return 0;
4053 out_overflow:
4054         print_overflow_msg(__func__, xdr);
4055         return -EIO;
4056 }
4057
4058 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4059 {
4060         int status = 0;
4061
4062         time->tv_sec = 0;
4063         time->tv_nsec = 0;
4064         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4065                 return -EIO;
4066         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4067                 status = decode_attr_time(xdr, time);
4068                 if (status == 0)
4069                         status = NFS_ATTR_FATTR_ATIME;
4070                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4071         }
4072         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4073         return status;
4074 }
4075
4076 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4077 {
4078         int status = 0;
4079
4080         time->tv_sec = 0;
4081         time->tv_nsec = 0;
4082         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4083                 return -EIO;
4084         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4085                 status = decode_attr_time(xdr, time);
4086                 if (status == 0)
4087                         status = NFS_ATTR_FATTR_CTIME;
4088                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4089         }
4090         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4091         return status;
4092 }
4093
4094 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4095                                   struct timespec *time)
4096 {
4097         int status = 0;
4098
4099         time->tv_sec = 0;
4100         time->tv_nsec = 0;
4101         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4102                 return -EIO;
4103         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4104                 status = decode_attr_time(xdr, time);
4105                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4106         }
4107         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4108                 (long)time->tv_nsec);
4109         return status;
4110 }
4111
4112 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4113                                         struct nfs4_label *label)
4114 {
4115         uint32_t pi = 0;
4116         uint32_t lfs = 0;
4117         __u32 len;
4118         __be32 *p;
4119         int status = 0;
4120
4121         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4122                 return -EIO;
4123         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4124                 p = xdr_inline_decode(xdr, 4);
4125                 if (unlikely(!p))
4126                         goto out_overflow;
4127                 lfs = be32_to_cpup(p++);
4128                 p = xdr_inline_decode(xdr, 4);
4129                 if (unlikely(!p))
4130                         goto out_overflow;
4131                 pi = be32_to_cpup(p++);
4132                 p = xdr_inline_decode(xdr, 4);
4133                 if (unlikely(!p))
4134                         goto out_overflow;
4135                 len = be32_to_cpup(p++);
4136                 p = xdr_inline_decode(xdr, len);
4137                 if (unlikely(!p))
4138                         goto out_overflow;
4139                 if (len < NFS4_MAXLABELLEN) {
4140                         if (label) {
4141                                 memcpy(label->label, p, len);
4142                                 label->len = len;
4143                                 label->pi = pi;
4144                                 label->lfs = lfs;
4145                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4146                         }
4147                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4148                 } else
4149                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4150                                         __func__, len);
4151         }
4152         if (label && label->label)
4153                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4154                         (char *)label->label, label->len, label->pi, label->lfs);
4155         return status;
4156
4157 out_overflow:
4158         print_overflow_msg(__func__, xdr);
4159         return -EIO;
4160 }
4161
4162 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4163 {
4164         int status = 0;
4165
4166         time->tv_sec = 0;
4167         time->tv_nsec = 0;
4168         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4169                 return -EIO;
4170         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4171                 status = decode_attr_time(xdr, time);
4172                 if (status == 0)
4173                         status = NFS_ATTR_FATTR_MTIME;
4174                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4175         }
4176         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4177         return status;
4178 }
4179
4180 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4181 {
4182         unsigned int attrwords = XDR_QUADLEN(attrlen);
4183         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4184
4185         if (unlikely(attrwords != nwords)) {
4186                 dprintk("%s: server returned incorrect attribute length: "
4187                         "%u %c %u\n",
4188                                 __func__,
4189                                 attrwords << 2,
4190                                 (attrwords < nwords) ? '<' : '>',
4191                                 nwords << 2);
4192                 return -EIO;
4193         }
4194         return 0;
4195 }
4196
4197 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4198 {
4199         __be32 *p;
4200
4201         p = xdr_inline_decode(xdr, 20);
4202         if (unlikely(!p))
4203                 goto out_overflow;
4204         cinfo->atomic = be32_to_cpup(p++);
4205         p = xdr_decode_hyper(p, &cinfo->before);
4206         xdr_decode_hyper(p, &cinfo->after);
4207         return 0;
4208 out_overflow:
4209         print_overflow_msg(__func__, xdr);
4210         return -EIO;
4211 }
4212
4213 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4214 {
4215         __be32 *p;
4216         uint32_t supp, acc;
4217         int status;
4218
4219         status = decode_op_hdr(xdr, OP_ACCESS);
4220         if (status)
4221                 return status;
4222         p = xdr_inline_decode(xdr, 8);
4223         if (unlikely(!p))
4224                 goto out_overflow;
4225         supp = be32_to_cpup(p++);
4226         acc = be32_to_cpup(p);
4227         *supported = supp;
4228         *access = acc;
4229         return 0;
4230 out_overflow:
4231         print_overflow_msg(__func__, xdr);
4232         return -EIO;
4233 }
4234
4235 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4236 {
4237         __be32 *p;
4238
4239         p = xdr_inline_decode(xdr, len);
4240         if (likely(p)) {
4241                 memcpy(buf, p, len);
4242                 return 0;
4243         }
4244         print_overflow_msg(__func__, xdr);
4245         return -EIO;
4246 }
4247
4248 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4249 {
4250         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4251 }
4252
4253 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4254 {
4255         int status;
4256
4257         status = decode_op_hdr(xdr, OP_CLOSE);
4258         if (status != -EIO)
4259                 nfs_increment_open_seqid(status, res->seqid);
4260         if (!status)
4261                 status = decode_stateid(xdr, &res->stateid);
4262         return status;
4263 }
4264
4265 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4266 {
4267         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4268 }
4269
4270 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4271 {
4272         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4273 }
4274
4275 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4276 {
4277         int status;
4278
4279         status = decode_op_hdr(xdr, OP_COMMIT);
4280         if (!status)
4281                 status = decode_write_verifier(xdr, &res->verf->verifier);
4282         return status;
4283 }
4284
4285 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4286 {
4287         __be32 *p;
4288         uint32_t bmlen;
4289         int status;
4290
4291         status = decode_op_hdr(xdr, OP_CREATE);
4292         if (status)
4293                 return status;
4294         if ((status = decode_change_info(xdr, cinfo)))
4295                 return status;
4296         p = xdr_inline_decode(xdr, 4);
4297         if (unlikely(!p))
4298                 goto out_overflow;
4299         bmlen = be32_to_cpup(p);
4300         p = xdr_inline_decode(xdr, bmlen << 2);
4301         if (likely(p))
4302                 return 0;
4303 out_overflow:
4304         print_overflow_msg(__func__, xdr);
4305         return -EIO;
4306 }
4307
4308 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4309 {
4310         unsigned int savep;
4311         uint32_t attrlen, bitmap[3] = {0};
4312         int status;
4313
4314         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4315                 goto xdr_error;
4316         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4317                 goto xdr_error;
4318         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4319                 goto xdr_error;
4320         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4321                 goto xdr_error;
4322         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4323                                                  &res->fh_expire_type)) != 0)
4324                 goto xdr_error;
4325         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4326                 goto xdr_error;
4327         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4328                 goto xdr_error;
4329         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4330                 goto xdr_error;
4331         status = verify_attr_len(xdr, savep, attrlen);
4332 xdr_error:
4333         dprintk("%s: xdr returned %d!\n", __func__, -status);
4334         return status;
4335 }
4336
4337 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4338 {
4339         unsigned int savep;
4340         uint32_t attrlen, bitmap[3] = {0};
4341         int status;
4342
4343         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4344                 goto xdr_error;
4345         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4346                 goto xdr_error;
4347         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4348                 goto xdr_error;
4349
4350         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4351                 goto xdr_error;
4352         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4353                 goto xdr_error;
4354         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4355                 goto xdr_error;
4356         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4357                 goto xdr_error;
4358         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4359                 goto xdr_error;
4360         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4361                 goto xdr_error;
4362
4363         status = verify_attr_len(xdr, savep, attrlen);
4364 xdr_error:
4365         dprintk("%s: xdr returned %d!\n", __func__, -status);
4366         return status;
4367 }
4368
4369 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4370 {
4371         unsigned int savep;
4372         uint32_t attrlen, bitmap[3] = {0};
4373         int status;
4374
4375         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4376                 goto xdr_error;
4377         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4378                 goto xdr_error;
4379         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4380                 goto xdr_error;
4381
4382         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4383                 goto xdr_error;
4384         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4385                 goto xdr_error;
4386
4387         status = verify_attr_len(xdr, savep, attrlen);
4388 xdr_error:
4389         dprintk("%s: xdr returned %d!\n", __func__, -status);
4390         return status;
4391 }
4392
4393 static int decode_threshold_hint(struct xdr_stream *xdr,
4394                                   uint32_t *bitmap,
4395                                   uint64_t *res,
4396                                   uint32_t hint_bit)
4397 {
4398         __be32 *p;
4399
4400         *res = 0;
4401         if (likely(bitmap[0] & hint_bit)) {
4402                 p = xdr_inline_decode(xdr, 8);
4403                 if (unlikely(!p))
4404                         goto out_overflow;
4405                 xdr_decode_hyper(p, res);
4406         }
4407         return 0;
4408 out_overflow:
4409         print_overflow_msg(__func__, xdr);
4410         return -EIO;
4411 }
4412
4413 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4414                                         struct nfs4_threshold *res)
4415 {
4416         __be32 *p;
4417         unsigned int savep;
4418         uint32_t bitmap[3] = {0,}, attrlen;
4419         int status;
4420
4421         /* layout type */
4422         p = xdr_inline_decode(xdr, 4);
4423         if (unlikely(!p)) {
4424                 print_overflow_msg(__func__, xdr);
4425                 return -EIO;
4426         }
4427         res->l_type = be32_to_cpup(p);
4428
4429         /* thi_hintset bitmap */
4430         status = decode_attr_bitmap(xdr, bitmap);
4431         if (status < 0)
4432                 goto xdr_error;
4433
4434         /* thi_hintlist length */
4435         status = decode_attr_length(xdr, &attrlen, &savep);
4436         if (status < 0)
4437                 goto xdr_error;
4438         /* thi_hintlist */
4439         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4440         if (status < 0)
4441                 goto xdr_error;
4442         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4443         if (status < 0)
4444                 goto xdr_error;
4445         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4446                                        THRESHOLD_RD_IO);
4447         if (status < 0)
4448                 goto xdr_error;
4449         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4450                                        THRESHOLD_WR_IO);
4451         if (status < 0)
4452                 goto xdr_error;
4453
4454         status = verify_attr_len(xdr, savep, attrlen);
4455         res->bm = bitmap[0];
4456
4457         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4458                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4459                 res->wr_io_sz);
4460 xdr_error:
4461         dprintk("%s ret=%d!\n", __func__, status);
4462         return status;
4463 }
4464
4465 /*
4466  * Thresholds on pNFS direct I/O vrs MDS I/O
4467  */
4468 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4469                                     uint32_t *bitmap,
4470                                     struct nfs4_threshold *res)
4471 {
4472         __be32 *p;
4473         int status = 0;
4474         uint32_t num;
4475
4476         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4477                 return -EIO;
4478         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4479                 /* Did the server return an unrequested attribute? */
4480                 if (unlikely(res == NULL))
4481                         return -EREMOTEIO;
4482                 p = xdr_inline_decode(xdr, 4);
4483                 if (unlikely(!p))
4484                         goto out_overflow;
4485                 num = be32_to_cpup(p);
4486                 if (num == 0)
4487                         return 0;
4488                 if (num > 1)
4489                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4490                                 "drivers per filesystem not supported\n",
4491                                 __func__);
4492
4493                 status = decode_first_threshold_item4(xdr, res);
4494                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4495         }
4496         return status;
4497 out_overflow:
4498         print_overflow_msg(__func__, xdr);
4499         return -EIO;
4500 }
4501
4502 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4503                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4504                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4505                 const struct nfs_server *server)
4506 {
4507         int status;
4508         umode_t fmode = 0;
4509         uint32_t type;
4510         int32_t err;
4511
4512         status = decode_attr_type(xdr, bitmap, &type);
4513         if (status < 0)
4514                 goto xdr_error;
4515         fattr->mode = 0;
4516         if (status != 0) {
4517                 fattr->mode |= nfs_type2fmt[type];
4518                 fattr->valid |= status;
4519         }
4520
4521         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4522         if (status < 0)
4523                 goto xdr_error;
4524         fattr->valid |= status;
4525
4526         status = decode_attr_size(xdr, bitmap, &fattr->size);
4527         if (status < 0)
4528                 goto xdr_error;
4529         fattr->valid |= status;
4530
4531         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4532         if (status < 0)
4533                 goto xdr_error;
4534         fattr->valid |= status;
4535
4536         err = 0;
4537         status = decode_attr_error(xdr, bitmap, &err);
4538         if (status < 0)
4539                 goto xdr_error;
4540
4541         status = decode_attr_filehandle(xdr, bitmap, fh);
4542         if (status < 0)
4543                 goto xdr_error;
4544
4545         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4546         if (status < 0)
4547                 goto xdr_error;
4548         fattr->valid |= status;
4549
4550         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4551         if (status < 0)
4552                 goto xdr_error;
4553         fattr->valid |= status;
4554
4555         status = decode_attr_mode(xdr, bitmap, &fmode);
4556         if (status < 0)
4557                 goto xdr_error;
4558         if (status != 0) {
4559                 fattr->mode |= fmode;
4560                 fattr->valid |= status;
4561         }
4562
4563         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4564         if (status < 0)
4565                 goto xdr_error;
4566         fattr->valid |= status;
4567
4568         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4569         if (status < 0)
4570                 goto xdr_error;
4571         fattr->valid |= status;
4572
4573         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4574         if (status < 0)
4575                 goto xdr_error;
4576         fattr->valid |= status;
4577
4578         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4579         if (status < 0)
4580                 goto xdr_error;
4581         fattr->valid |= status;
4582
4583         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4584         if (status < 0)
4585                 goto xdr_error;
4586         fattr->valid |= status;
4587
4588         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4589         if (status < 0)
4590                 goto xdr_error;
4591         fattr->valid |= status;
4592
4593         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4594         if (status < 0)
4595                 goto xdr_error;
4596         fattr->valid |= status;
4597
4598         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4599         if (status < 0)
4600                 goto xdr_error;
4601         fattr->valid |= status;
4602
4603         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4604         if (status < 0)
4605                 goto xdr_error;
4606         fattr->valid |= status;
4607
4608         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4609         if (status < 0)
4610                 goto xdr_error;
4611
4612         if (label) {
4613                 status = decode_attr_security_label(xdr, bitmap, label);
4614                 if (status < 0)
4615                         goto xdr_error;
4616                 fattr->valid |= status;
4617         }
4618
4619 xdr_error:
4620         dprintk("%s: xdr returned %d\n", __func__, -status);
4621         return status;
4622 }
4623
4624 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4625                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4626                 struct nfs4_label *label, const struct nfs_server *server)
4627 {
4628         unsigned int savep;
4629         uint32_t attrlen,
4630                  bitmap[3] = {0};
4631         int status;
4632
4633         status = decode_op_hdr(xdr, OP_GETATTR);
4634         if (status < 0)
4635                 goto xdr_error;
4636
4637         status = decode_attr_bitmap(xdr, bitmap);
4638         if (status < 0)
4639                 goto xdr_error;
4640
4641         status = decode_attr_length(xdr, &attrlen, &savep);
4642         if (status < 0)
4643                 goto xdr_error;
4644
4645         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4646                                         label, server);
4647         if (status < 0)
4648                 goto xdr_error;
4649
4650         status = verify_attr_len(xdr, savep, attrlen);
4651 xdr_error:
4652         dprintk("%s: xdr returned %d\n", __func__, -status);
4653         return status;
4654 }
4655
4656 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4657                 struct nfs4_label *label, const struct nfs_server *server)
4658 {
4659         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4660 }
4661
4662 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4663                 const struct nfs_server *server)
4664 {
4665         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4666 }
4667
4668 /*
4669  * Decode potentially multiple layout types. Currently we only support
4670  * one layout driver per file system.
4671  */
4672 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4673                                          uint32_t *layouttype)
4674 {
4675         __be32 *p;
4676         int num;
4677
4678         p = xdr_inline_decode(xdr, 4);
4679         if (unlikely(!p))
4680                 goto out_overflow;
4681         num = be32_to_cpup(p);
4682
4683         /* pNFS is not supported by the underlying file system */
4684         if (num == 0) {
4685                 *layouttype = 0;
4686                 return 0;
4687         }
4688         if (num > 1)
4689                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4690                         "drivers per filesystem not supported\n", __func__);
4691
4692         /* Decode and set first layout type, move xdr->p past unused types */
4693         p = xdr_inline_decode(xdr, num * 4);
4694         if (unlikely(!p))
4695                 goto out_overflow;
4696         *layouttype = be32_to_cpup(p);
4697         return 0;
4698 out_overflow:
4699         print_overflow_msg(__func__, xdr);
4700         return -EIO;
4701 }
4702
4703 /*
4704  * The type of file system exported.
4705  * Note we must ensure that layouttype is set in any non-error case.
4706  */
4707 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4708                                 uint32_t *layouttype)
4709 {
4710         int status = 0;
4711
4712         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4713         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4714                 return -EIO;
4715         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4716                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4717                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4718         } else
4719                 *layouttype = 0;
4720         return status;
4721 }
4722
4723 /*
4724  * The prefered block size for layout directed io
4725  */
4726 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4727                                       uint32_t *res)
4728 {
4729         __be32 *p;
4730
4731         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4732         *res = 0;
4733         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4734                 p = xdr_inline_decode(xdr, 4);
4735                 if (unlikely(!p)) {
4736                         print_overflow_msg(__func__, xdr);
4737                         return -EIO;
4738                 }
4739                 *res = be32_to_cpup(p);
4740                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4741         }
4742         return 0;
4743 }
4744
4745 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4746 {
4747         unsigned int savep;
4748         uint32_t attrlen, bitmap[3];
4749         int status;
4750
4751         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4752                 goto xdr_error;
4753         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4754                 goto xdr_error;
4755         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4756                 goto xdr_error;
4757
4758         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4759
4760         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4761                 goto xdr_error;
4762         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4763                 goto xdr_error;
4764         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4765                 goto xdr_error;
4766         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4767         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4768                 goto xdr_error;
4769         fsinfo->wtpref = fsinfo->wtmax;
4770         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4771         if (status != 0)
4772                 goto xdr_error;
4773         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4774         if (status != 0)
4775                 goto xdr_error;
4776         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4777         if (status)
4778                 goto xdr_error;
4779
4780         status = verify_attr_len(xdr, savep, attrlen);
4781 xdr_error:
4782         dprintk("%s: xdr returned %d!\n", __func__, -status);
4783         return status;
4784 }
4785
4786 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4787 {
4788         __be32 *p;
4789         uint32_t len;
4790         int status;
4791
4792         /* Zero handle first to allow comparisons */
4793         memset(fh, 0, sizeof(*fh));
4794
4795         status = decode_op_hdr(xdr, OP_GETFH);
4796         if (status)
4797                 return status;
4798
4799         p = xdr_inline_decode(xdr, 4);
4800         if (unlikely(!p))
4801                 goto out_overflow;
4802         len = be32_to_cpup(p);
4803         if (len > NFS4_FHSIZE)
4804                 return -EIO;
4805         fh->size = len;
4806         p = xdr_inline_decode(xdr, len);
4807         if (unlikely(!p))
4808                 goto out_overflow;
4809         memcpy(fh->data, p, len);
4810         return 0;
4811 out_overflow:
4812         print_overflow_msg(__func__, xdr);
4813         return -EIO;
4814 }
4815
4816 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4817 {
4818         int status;
4819
4820         status = decode_op_hdr(xdr, OP_LINK);
4821         if (status)
4822                 return status;
4823         return decode_change_info(xdr, cinfo);
4824 }
4825
4826 /*
4827  * We create the owner, so we know a proper owner.id length is 4.
4828  */
4829 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4830 {
4831         uint64_t offset, length, clientid;
4832         __be32 *p;
4833         uint32_t namelen, type;
4834
4835         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4836         if (unlikely(!p))
4837                 goto out_overflow;
4838         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4839         p = xdr_decode_hyper(p, &length);
4840         type = be32_to_cpup(p++); /* 4 byte read */
4841         if (fl != NULL) { /* manipulate file lock */
4842                 fl->fl_start = (loff_t)offset;
4843                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4844                 if (length == ~(uint64_t)0)
4845                         fl->fl_end = OFFSET_MAX;
4846                 fl->fl_type = F_WRLCK;
4847                 if (type & 1)
4848                         fl->fl_type = F_RDLCK;
4849                 fl->fl_pid = 0;
4850         }
4851         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4852         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4853         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4854         if (likely(p))
4855                 return -NFS4ERR_DENIED;
4856 out_overflow:
4857         print_overflow_msg(__func__, xdr);
4858         return -EIO;
4859 }
4860
4861 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4862 {
4863         int status;
4864
4865         status = decode_op_hdr(xdr, OP_LOCK);
4866         if (status == -EIO)
4867                 goto out;
4868         if (status == 0) {
4869                 status = decode_stateid(xdr, &res->stateid);
4870                 if (unlikely(status))
4871                         goto out;
4872         } else if (status == -NFS4ERR_DENIED)
4873                 status = decode_lock_denied(xdr, NULL);
4874         if (res->open_seqid != NULL)
4875                 nfs_increment_open_seqid(status, res->open_seqid);
4876         nfs_increment_lock_seqid(status, res->lock_seqid);
4877 out:
4878         return status;
4879 }
4880
4881 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4882 {
4883         int status;
4884         status = decode_op_hdr(xdr, OP_LOCKT);
4885         if (status == -NFS4ERR_DENIED)
4886                 return decode_lock_denied(xdr, res->denied);
4887         return status;
4888 }
4889
4890 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4891 {
4892         int status;
4893
4894         status = decode_op_hdr(xdr, OP_LOCKU);
4895         if (status != -EIO)
4896                 nfs_increment_lock_seqid(status, res->seqid);
4897         if (status == 0)
4898                 status = decode_stateid(xdr, &res->stateid);
4899         return status;
4900 }
4901
4902 static int decode_release_lockowner(struct xdr_stream *xdr)
4903 {
4904         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4905 }
4906
4907 static int decode_lookup(struct xdr_stream *xdr)
4908 {
4909         return decode_op_hdr(xdr, OP_LOOKUP);
4910 }
4911
4912 /* This is too sick! */
4913 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4914 {
4915         __be32 *p;
4916         uint32_t limit_type, nblocks, blocksize;
4917
4918         p = xdr_inline_decode(xdr, 12);
4919         if (unlikely(!p))
4920                 goto out_overflow;
4921         limit_type = be32_to_cpup(p++);
4922         switch (limit_type) {
4923         case 1:
4924                 xdr_decode_hyper(p, maxsize);
4925                 break;
4926         case 2:
4927                 nblocks = be32_to_cpup(p++);
4928                 blocksize = be32_to_cpup(p);
4929                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4930         }
4931         return 0;
4932 out_overflow:
4933         print_overflow_msg(__func__, xdr);
4934         return -EIO;
4935 }
4936
4937 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4938 {
4939         __be32 *p;
4940         uint32_t delegation_type;
4941         int status;
4942
4943         p = xdr_inline_decode(xdr, 4);
4944         if (unlikely(!p))
4945                 goto out_overflow;
4946         delegation_type = be32_to_cpup(p);
4947         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4948                 res->delegation_type = 0;
4949                 return 0;
4950         }
4951         status = decode_stateid(xdr, &res->delegation);
4952         if (unlikely(status))
4953                 return status;
4954         p = xdr_inline_decode(xdr, 4);
4955         if (unlikely(!p))
4956                 goto out_overflow;
4957         res->do_recall = be32_to_cpup(p);
4958
4959         switch (delegation_type) {
4960         case NFS4_OPEN_DELEGATE_READ:
4961                 res->delegation_type = FMODE_READ;
4962                 break;
4963         case NFS4_OPEN_DELEGATE_WRITE:
4964                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4965                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4966                                 return -EIO;
4967         }
4968         return decode_ace(xdr, NULL, res->server->nfs_client);
4969 out_overflow:
4970         print_overflow_msg(__func__, xdr);
4971         return -EIO;
4972 }
4973
4974 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4975 {
4976         __be32 *p;
4977         uint32_t savewords, bmlen, i;
4978         int status;
4979
4980         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
4981                 return status;
4982         nfs_increment_open_seqid(status, res->seqid);
4983         if (status)
4984                 return status;
4985         status = decode_stateid(xdr, &res->stateid);
4986         if (unlikely(status))
4987                 return status;
4988
4989         decode_change_info(xdr, &res->cinfo);
4990
4991         p = xdr_inline_decode(xdr, 8);
4992         if (unlikely(!p))
4993                 goto out_overflow;
4994         res->rflags = be32_to_cpup(p++);
4995         bmlen = be32_to_cpup(p);
4996         if (bmlen > 10)
4997                 goto xdr_error;
4998
4999         p = xdr_inline_decode(xdr, bmlen << 2);
5000         if (unlikely(!p))
5001                 goto out_overflow;
5002         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5003         for (i = 0; i < savewords; ++i)
5004                 res->attrset[i] = be32_to_cpup(p++);
5005         for (; i < NFS4_BITMAP_SIZE; i++)
5006                 res->attrset[i] = 0;
5007
5008         return decode_delegation(xdr, res);
5009 xdr_error:
5010         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5011         return -EIO;
5012 out_overflow:
5013         print_overflow_msg(__func__, xdr);
5014         return -EIO;
5015 }
5016
5017 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5018 {
5019         int status;
5020
5021         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5022         if (status != -EIO)
5023                 nfs_increment_open_seqid(status, res->seqid);
5024         if (!status)
5025                 status = decode_stateid(xdr, &res->stateid);
5026         return status;
5027 }
5028
5029 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5030 {
5031         int status;
5032
5033         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5034         if (status != -EIO)
5035                 nfs_increment_open_seqid(status, res->seqid);
5036         if (!status)
5037                 status = decode_stateid(xdr, &res->stateid);
5038         return status;
5039 }
5040
5041 static int decode_putfh(struct xdr_stream *xdr)
5042 {
5043         return decode_op_hdr(xdr, OP_PUTFH);
5044 }
5045
5046 static int decode_putrootfh(struct xdr_stream *xdr)
5047 {
5048         return decode_op_hdr(xdr, OP_PUTROOTFH);
5049 }
5050
5051 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5052                        struct nfs_pgio_res *res)
5053 {
5054         __be32 *p;
5055         uint32_t count, eof, recvd;
5056         int status;
5057
5058         status = decode_op_hdr(xdr, OP_READ);
5059         if (status)
5060                 return status;
5061         p = xdr_inline_decode(xdr, 8);
5062         if (unlikely(!p))
5063                 goto out_overflow;
5064         eof = be32_to_cpup(p++);
5065         count = be32_to_cpup(p);
5066         recvd = xdr_read_pages(xdr, count);
5067         if (count > recvd) {
5068                 dprintk("NFS: server cheating in read reply: "
5069                                 "count %u > recvd %u\n", count, recvd);
5070                 count = recvd;
5071                 eof = 0;
5072         }
5073         res->eof = eof;
5074         res->count = count;
5075         return 0;
5076 out_overflow:
5077         print_overflow_msg(__func__, xdr);
5078         return -EIO;
5079 }
5080
5081 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5082 {
5083         int             status;
5084         __be32          verf[2];
5085
5086         status = decode_op_hdr(xdr, OP_READDIR);
5087         if (!status)
5088                 status = decode_verifier(xdr, readdir->verifier.data);
5089         if (unlikely(status))
5090                 return status;
5091         memcpy(verf, readdir->verifier.data, sizeof(verf));
5092         dprintk("%s: verifier = %08x:%08x\n",
5093                         __func__, verf[0], verf[1]);
5094         return xdr_read_pages(xdr, xdr->buf->page_len);
5095 }
5096
5097 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5098 {
5099         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5100         u32 len, recvd;
5101         __be32 *p;
5102         int status;
5103
5104         status = decode_op_hdr(xdr, OP_READLINK);
5105         if (status)
5106                 return status;
5107
5108         /* Convert length of symlink */
5109         p = xdr_inline_decode(xdr, 4);
5110         if (unlikely(!p))
5111                 goto out_overflow;
5112         len = be32_to_cpup(p);
5113         if (len >= rcvbuf->page_len || len <= 0) {
5114                 dprintk("nfs: server returned giant symlink!\n");
5115                 return -ENAMETOOLONG;
5116         }
5117         recvd = xdr_read_pages(xdr, len);
5118         if (recvd < len) {
5119                 dprintk("NFS: server cheating in readlink reply: "
5120                                 "count %u > recvd %u\n", len, recvd);
5121                 return -EIO;
5122         }
5123         /*
5124          * The XDR encode routine has set things up so that
5125          * the link text will be copied directly into the
5126          * buffer.  We just have to do overflow-checking,
5127          * and and null-terminate the text (the VFS expects
5128          * null-termination).
5129          */
5130         xdr_terminate_string(rcvbuf, len);
5131         return 0;
5132 out_overflow:
5133         print_overflow_msg(__func__, xdr);
5134         return -EIO;
5135 }
5136
5137 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5138 {
5139         int status;
5140
5141         status = decode_op_hdr(xdr, OP_REMOVE);
5142         if (status)
5143                 goto out;
5144         status = decode_change_info(xdr, cinfo);
5145 out:
5146         return status;
5147 }
5148
5149 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5150               struct nfs4_change_info *new_cinfo)
5151 {
5152         int status;
5153
5154         status = decode_op_hdr(xdr, OP_RENAME);
5155         if (status)
5156                 goto out;
5157         if ((status = decode_change_info(xdr, old_cinfo)))
5158                 goto out;
5159         status = decode_change_info(xdr, new_cinfo);
5160 out:
5161         return status;
5162 }
5163
5164 static int decode_renew(struct xdr_stream *xdr)
5165 {
5166         return decode_op_hdr(xdr, OP_RENEW);
5167 }
5168
5169 static int
5170 decode_restorefh(struct xdr_stream *xdr)
5171 {
5172         return decode_op_hdr(xdr, OP_RESTOREFH);
5173 }
5174
5175 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5176                          struct nfs_getaclres *res)
5177 {
5178         unsigned int savep;
5179         uint32_t attrlen,
5180                  bitmap[3] = {0};
5181         int status;
5182         unsigned int pg_offset;
5183
5184         res->acl_len = 0;
5185         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5186                 goto out;
5187
5188         xdr_enter_page(xdr, xdr->buf->page_len);
5189
5190         /* Calculate the offset of the page data */
5191         pg_offset = xdr->buf->head[0].iov_len;
5192
5193         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5194                 goto out;
5195         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5196                 goto out;
5197
5198         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5199                 return -EIO;
5200         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5201
5202                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5203                  * are stored with the acl data to handle the problem of
5204                  * variable length bitmaps.*/
5205                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5206                 res->acl_len = attrlen;
5207
5208                 /* Check for receive buffer overflow */
5209                 if (res->acl_len > (xdr->nwords << 2) ||
5210                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5211                         res->acl_flags |= NFS4_ACL_TRUNC;
5212                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5213                                         attrlen, xdr->nwords << 2);
5214                 }
5215         } else
5216                 status = -EOPNOTSUPP;
5217
5218 out:
5219         return status;
5220 }
5221
5222 static int
5223 decode_savefh(struct xdr_stream *xdr)
5224 {
5225         return decode_op_hdr(xdr, OP_SAVEFH);
5226 }
5227
5228 static int decode_setattr(struct xdr_stream *xdr)
5229 {
5230         __be32 *p;
5231         uint32_t bmlen;
5232         int status;
5233
5234         status = decode_op_hdr(xdr, OP_SETATTR);
5235         if (status)
5236                 return status;
5237         p = xdr_inline_decode(xdr, 4);
5238         if (unlikely(!p))
5239                 goto out_overflow;
5240         bmlen = be32_to_cpup(p);
5241         p = xdr_inline_decode(xdr, bmlen << 2);
5242         if (likely(p))
5243                 return 0;
5244 out_overflow:
5245         print_overflow_msg(__func__, xdr);
5246         return -EIO;
5247 }
5248
5249 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5250 {
5251         __be32 *p;
5252         uint32_t opnum;
5253         int32_t nfserr;
5254
5255         p = xdr_inline_decode(xdr, 8);
5256         if (unlikely(!p))
5257                 goto out_overflow;
5258         opnum = be32_to_cpup(p++);
5259         if (opnum != OP_SETCLIENTID) {
5260                 dprintk("nfs: decode_setclientid: Server returned operation"
5261                         " %d\n", opnum);
5262                 return -EIO;
5263         }
5264         nfserr = be32_to_cpup(p);
5265         if (nfserr == NFS_OK) {
5266                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5267                 if (unlikely(!p))
5268                         goto out_overflow;
5269                 p = xdr_decode_hyper(p, &res->clientid);
5270                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5271         } else if (nfserr == NFSERR_CLID_INUSE) {
5272                 uint32_t len;
5273
5274                 /* skip netid string */
5275                 p = xdr_inline_decode(xdr, 4);
5276                 if (unlikely(!p))
5277                         goto out_overflow;
5278                 len = be32_to_cpup(p);
5279                 p = xdr_inline_decode(xdr, len);
5280                 if (unlikely(!p))
5281                         goto out_overflow;
5282
5283                 /* skip uaddr string */
5284                 p = xdr_inline_decode(xdr, 4);
5285                 if (unlikely(!p))
5286                         goto out_overflow;
5287                 len = be32_to_cpup(p);
5288                 p = xdr_inline_decode(xdr, len);
5289                 if (unlikely(!p))
5290                         goto out_overflow;
5291                 return -NFSERR_CLID_INUSE;
5292         } else
5293                 return nfs4_stat_to_errno(nfserr);
5294
5295         return 0;
5296 out_overflow:
5297         print_overflow_msg(__func__, xdr);
5298         return -EIO;
5299 }
5300
5301 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5302 {
5303         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5304 }
5305
5306 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5307 {
5308         __be32 *p;
5309         int status;
5310
5311         status = decode_op_hdr(xdr, OP_WRITE);
5312         if (status)
5313                 return status;
5314
5315         p = xdr_inline_decode(xdr, 8);
5316         if (unlikely(!p))
5317                 goto out_overflow;
5318         res->count = be32_to_cpup(p++);
5319         res->verf->committed = be32_to_cpup(p++);
5320         return decode_write_verifier(xdr, &res->verf->verifier);
5321 out_overflow:
5322         print_overflow_msg(__func__, xdr);
5323         return -EIO;
5324 }
5325
5326 static int decode_delegreturn(struct xdr_stream *xdr)
5327 {
5328         return decode_op_hdr(xdr, OP_DELEGRETURN);
5329 }
5330
5331 static int decode_secinfo_gss(struct xdr_stream *xdr,
5332                               struct nfs4_secinfo4 *flavor)
5333 {
5334         u32 oid_len;
5335         __be32 *p;
5336
5337         p = xdr_inline_decode(xdr, 4);
5338         if (unlikely(!p))
5339                 goto out_overflow;
5340         oid_len = be32_to_cpup(p);
5341         if (oid_len > GSS_OID_MAX_LEN)
5342                 goto out_err;
5343
5344         p = xdr_inline_decode(xdr, oid_len);
5345         if (unlikely(!p))
5346                 goto out_overflow;
5347         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5348         flavor->flavor_info.oid.len = oid_len;
5349
5350         p = xdr_inline_decode(xdr, 8);
5351         if (unlikely(!p))
5352                 goto out_overflow;
5353         flavor->flavor_info.qop = be32_to_cpup(p++);
5354         flavor->flavor_info.service = be32_to_cpup(p);
5355
5356         return 0;
5357
5358 out_overflow:
5359         print_overflow_msg(__func__, xdr);
5360         return -EIO;
5361 out_err:
5362         return -EINVAL;
5363 }
5364
5365 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5366 {
5367         struct nfs4_secinfo4 *sec_flavor;
5368         unsigned int i, num_flavors;
5369         int status;
5370         __be32 *p;
5371
5372         p = xdr_inline_decode(xdr, 4);
5373         if (unlikely(!p))
5374                 goto out_overflow;
5375
5376         res->flavors->num_flavors = 0;
5377         num_flavors = be32_to_cpup(p);
5378
5379         for (i = 0; i < num_flavors; i++) {
5380                 sec_flavor = &res->flavors->flavors[i];
5381                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5382                         break;
5383
5384                 p = xdr_inline_decode(xdr, 4);
5385                 if (unlikely(!p))
5386                         goto out_overflow;
5387                 sec_flavor->flavor = be32_to_cpup(p);
5388
5389                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5390                         status = decode_secinfo_gss(xdr, sec_flavor);
5391                         if (status)
5392                                 goto out;
5393                 }
5394                 res->flavors->num_flavors++;
5395         }
5396
5397         status = 0;
5398 out:
5399         return status;
5400 out_overflow:
5401         print_overflow_msg(__func__, xdr);
5402         return -EIO;
5403 }
5404
5405 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5406 {
5407         int status = decode_op_hdr(xdr, OP_SECINFO);
5408         if (status)
5409                 return status;
5410         return decode_secinfo_common(xdr, res);
5411 }
5412
5413 #if defined(CONFIG_NFS_V4_1)
5414 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5415 {
5416         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5417         if (status)
5418                 return status;
5419         return decode_secinfo_common(xdr, res);
5420 }
5421
5422 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5423 {
5424         __be32 *p;
5425         uint32_t bitmap_words;
5426         unsigned int i;
5427
5428         p = xdr_inline_decode(xdr, 4);
5429         bitmap_words = be32_to_cpup(p++);
5430         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5431                 return -EIO;
5432         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5433         for (i = 0; i < bitmap_words; i++)
5434                 op_map->u.words[i] = be32_to_cpup(p++);
5435
5436         return 0;
5437 }
5438
5439 static int decode_exchange_id(struct xdr_stream *xdr,
5440                               struct nfs41_exchange_id_res *res)
5441 {
5442         __be32 *p;
5443         uint32_t dummy;
5444         char *dummy_str;
5445         int status;
5446         uint32_t impl_id_count;
5447
5448         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5449         if (status)
5450                 return status;
5451
5452         p = xdr_inline_decode(xdr, 8);
5453         if (unlikely(!p))
5454                 goto out_overflow;
5455         xdr_decode_hyper(p, &res->clientid);
5456         p = xdr_inline_decode(xdr, 12);
5457         if (unlikely(!p))
5458                 goto out_overflow;
5459         res->seqid = be32_to_cpup(p++);
5460         res->flags = be32_to_cpup(p++);
5461
5462         res->state_protect.how = be32_to_cpup(p);
5463         switch (res->state_protect.how) {
5464         case SP4_NONE:
5465                 break;
5466         case SP4_MACH_CRED:
5467                 status = decode_op_map(xdr, &res->state_protect.enforce);
5468                 if (status)
5469                         return status;
5470                 status = decode_op_map(xdr, &res->state_protect.allow);
5471                 if (status)
5472                         return status;
5473                 break;
5474         default:
5475                 WARN_ON_ONCE(1);
5476                 return -EIO;
5477         }
5478
5479         /* server_owner4.so_minor_id */
5480         p = xdr_inline_decode(xdr, 8);
5481         if (unlikely(!p))
5482                 goto out_overflow;
5483         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5484
5485         /* server_owner4.so_major_id */
5486         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5487         if (unlikely(status))
5488                 return status;
5489         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5490                 return -EIO;
5491         memcpy(res->server_owner->major_id, dummy_str, dummy);
5492         res->server_owner->major_id_sz = dummy;
5493
5494         /* server_scope4 */
5495         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5496         if (unlikely(status))
5497                 return status;
5498         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5499                 return -EIO;
5500         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5501         res->server_scope->server_scope_sz = dummy;
5502
5503         /* Implementation Id */
5504         p = xdr_inline_decode(xdr, 4);
5505         if (unlikely(!p))
5506                 goto out_overflow;
5507         impl_id_count = be32_to_cpup(p++);
5508
5509         if (impl_id_count) {
5510                 /* nii_domain */
5511                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5512                 if (unlikely(status))
5513                         return status;
5514                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5515                         return -EIO;
5516                 memcpy(res->impl_id->domain, dummy_str, dummy);
5517
5518                 /* nii_name */
5519                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5520                 if (unlikely(status))
5521                         return status;
5522                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5523                         return -EIO;
5524                 memcpy(res->impl_id->name, dummy_str, dummy);
5525
5526                 /* nii_date */
5527                 p = xdr_inline_decode(xdr, 12);
5528                 if (unlikely(!p))
5529                         goto out_overflow;
5530                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5531                 res->impl_id->date.nseconds = be32_to_cpup(p);
5532
5533                 /* if there's more than one entry, ignore the rest */
5534         }
5535         return 0;
5536 out_overflow:
5537         print_overflow_msg(__func__, xdr);
5538         return -EIO;
5539 }
5540
5541 static int decode_chan_attrs(struct xdr_stream *xdr,
5542                              struct nfs4_channel_attrs *attrs)
5543 {
5544         __be32 *p;
5545         u32 nr_attrs, val;
5546
5547         p = xdr_inline_decode(xdr, 28);
5548         if (unlikely(!p))
5549                 goto out_overflow;
5550         val = be32_to_cpup(p++);        /* headerpadsz */
5551         if (val)
5552                 return -EINVAL;         /* no support for header padding yet */
5553         attrs->max_rqst_sz = be32_to_cpup(p++);
5554         attrs->max_resp_sz = be32_to_cpup(p++);
5555         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5556         attrs->max_ops = be32_to_cpup(p++);
5557         attrs->max_reqs = be32_to_cpup(p++);
5558         nr_attrs = be32_to_cpup(p);
5559         if (unlikely(nr_attrs > 1)) {
5560                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5561                         "count %u\n", __func__, nr_attrs);
5562                 return -EINVAL;
5563         }
5564         if (nr_attrs == 1) {
5565                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5566                 if (unlikely(!p))
5567                         goto out_overflow;
5568         }
5569         return 0;
5570 out_overflow:
5571         print_overflow_msg(__func__, xdr);
5572         return -EIO;
5573 }
5574
5575 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5576 {
5577         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5578 }
5579
5580 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5581                                 struct nfs41_bind_conn_to_session_res *res)
5582 {
5583         __be32 *p;
5584         int status;
5585
5586         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5587         if (!status)
5588                 status = decode_sessionid(xdr, &res->session->sess_id);
5589         if (unlikely(status))
5590                 return status;
5591
5592         /* dir flags, rdma mode bool */
5593         p = xdr_inline_decode(xdr, 8);
5594         if (unlikely(!p))
5595                 goto out_overflow;
5596
5597         res->dir = be32_to_cpup(p++);
5598         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5599                 return -EIO;
5600         if (be32_to_cpup(p) == 0)
5601                 res->use_conn_in_rdma_mode = false;
5602         else
5603                 res->use_conn_in_rdma_mode = true;
5604
5605         return 0;
5606 out_overflow:
5607         print_overflow_msg(__func__, xdr);
5608         return -EIO;
5609 }
5610
5611 static int decode_create_session(struct xdr_stream *xdr,
5612                                  struct nfs41_create_session_res *res)
5613 {
5614         __be32 *p;
5615         int status;
5616         struct nfs_client *clp = res->client;
5617         struct nfs4_session *session = clp->cl_session;
5618
5619         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5620         if (!status)
5621                 status = decode_sessionid(xdr, &session->sess_id);
5622         if (unlikely(status))
5623                 return status;
5624
5625         /* seqid, flags */
5626         p = xdr_inline_decode(xdr, 8);
5627         if (unlikely(!p))
5628                 goto out_overflow;
5629         clp->cl_seqid = be32_to_cpup(p++);
5630         session->flags = be32_to_cpup(p);
5631
5632         /* Channel attributes */
5633         status = decode_chan_attrs(xdr, &session->fc_attrs);
5634         if (!status)
5635                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5636         return status;
5637 out_overflow:
5638         print_overflow_msg(__func__, xdr);
5639         return -EIO;
5640 }
5641
5642 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5643 {
5644         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5645 }
5646
5647 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5648 {
5649         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5650 }
5651
5652 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5653 {
5654         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5655 }
5656 #endif /* CONFIG_NFS_V4_1 */
5657
5658 static int decode_sequence(struct xdr_stream *xdr,
5659                            struct nfs4_sequence_res *res,
5660                            struct rpc_rqst *rqstp)
5661 {
5662 #if defined(CONFIG_NFS_V4_1)
5663         struct nfs4_session *session;
5664         struct nfs4_sessionid id;
5665         u32 dummy;
5666         int status;
5667         __be32 *p;
5668
5669         if (res->sr_slot == NULL)
5670                 return 0;
5671         if (!res->sr_slot->table->session)
5672                 return 0;
5673
5674         status = decode_op_hdr(xdr, OP_SEQUENCE);
5675         if (!status)
5676                 status = decode_sessionid(xdr, &id);
5677         if (unlikely(status))
5678                 goto out_err;
5679
5680         /*
5681          * If the server returns different values for sessionID, slotID or
5682          * sequence number, the server is looney tunes.
5683          */
5684         status = -EREMOTEIO;
5685         session = res->sr_slot->table->session;
5686
5687         if (memcmp(id.data, session->sess_id.data,
5688                    NFS4_MAX_SESSIONID_LEN)) {
5689                 dprintk("%s Invalid session id\n", __func__);
5690                 goto out_err;
5691         }
5692
5693         p = xdr_inline_decode(xdr, 20);
5694         if (unlikely(!p))
5695                 goto out_overflow;
5696
5697         /* seqid */
5698         dummy = be32_to_cpup(p++);
5699         if (dummy != res->sr_slot->seq_nr) {
5700                 dprintk("%s Invalid sequence number\n", __func__);
5701                 goto out_err;
5702         }
5703         /* slot id */
5704         dummy = be32_to_cpup(p++);
5705         if (dummy != res->sr_slot->slot_nr) {
5706                 dprintk("%s Invalid slot id\n", __func__);
5707                 goto out_err;
5708         }
5709         /* highest slot id */
5710         res->sr_highest_slotid = be32_to_cpup(p++);
5711         /* target highest slot id */
5712         res->sr_target_highest_slotid = be32_to_cpup(p++);
5713         /* result flags */
5714         res->sr_status_flags = be32_to_cpup(p);
5715         status = 0;
5716 out_err:
5717         res->sr_status = status;
5718         return status;
5719 out_overflow:
5720         print_overflow_msg(__func__, xdr);
5721         status = -EIO;
5722         goto out_err;
5723 #else  /* CONFIG_NFS_V4_1 */
5724         return 0;
5725 #endif /* CONFIG_NFS_V4_1 */
5726 }
5727
5728 #if defined(CONFIG_NFS_V4_1)
5729 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5730                                 struct pnfs_device *pdev)
5731 {
5732         __be32 *p;
5733         uint32_t len, type;
5734         int status;
5735
5736         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5737         if (status) {
5738                 if (status == -ETOOSMALL) {
5739                         p = xdr_inline_decode(xdr, 4);
5740                         if (unlikely(!p))
5741                                 goto out_overflow;
5742                         pdev->mincount = be32_to_cpup(p);
5743                         dprintk("%s: Min count too small. mincnt = %u\n",
5744                                 __func__, pdev->mincount);
5745                 }
5746                 return status;
5747         }
5748
5749         p = xdr_inline_decode(xdr, 8);
5750         if (unlikely(!p))
5751                 goto out_overflow;
5752         type = be32_to_cpup(p++);
5753         if (type != pdev->layout_type) {
5754                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5755                         __func__, pdev->layout_type, type);
5756                 return -EINVAL;
5757         }
5758         /*
5759          * Get the length of the opaque device_addr4. xdr_read_pages places
5760          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5761          * and places the remaining xdr data in xdr_buf->tail
5762          */
5763         pdev->mincount = be32_to_cpup(p);
5764         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5765                 goto out_overflow;
5766
5767         /* Parse notification bitmap, verifying that it is zero. */
5768         p = xdr_inline_decode(xdr, 4);
5769         if (unlikely(!p))
5770                 goto out_overflow;
5771         len = be32_to_cpup(p);
5772         if (len) {
5773                 uint32_t i;
5774
5775                 p = xdr_inline_decode(xdr, 4 * len);
5776                 if (unlikely(!p))
5777                         goto out_overflow;
5778
5779                 if (be32_to_cpup(p++) &
5780                     ~(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE)) {
5781                         dprintk("%s: unsupported notification\n",
5782                                 __func__);
5783                 }
5784
5785                 for (i = 1; i < len; i++) {
5786                         if (be32_to_cpup(p++)) {
5787                                 dprintk("%s: unsupported notification\n",
5788                                         __func__);
5789                                 return -EIO;
5790                         }
5791                 }
5792         }
5793         return 0;
5794 out_overflow:
5795         print_overflow_msg(__func__, xdr);
5796         return -EIO;
5797 }
5798
5799 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5800                             struct nfs4_layoutget_res *res)
5801 {
5802         __be32 *p;
5803         int status;
5804         u32 layout_count;
5805         u32 recvd;
5806
5807         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5808         if (status)
5809                 return status;
5810         p = xdr_inline_decode(xdr, 4);
5811         if (unlikely(!p))
5812                 goto out_overflow;
5813         res->return_on_close = be32_to_cpup(p);
5814         decode_stateid(xdr, &res->stateid);
5815         p = xdr_inline_decode(xdr, 4);
5816         if (unlikely(!p))
5817                 goto out_overflow;
5818         layout_count = be32_to_cpup(p);
5819         if (!layout_count) {
5820                 dprintk("%s: server responded with empty layout array\n",
5821                         __func__);
5822                 return -EINVAL;
5823         }
5824
5825         p = xdr_inline_decode(xdr, 28);
5826         if (unlikely(!p))
5827                 goto out_overflow;
5828         p = xdr_decode_hyper(p, &res->range.offset);
5829         p = xdr_decode_hyper(p, &res->range.length);
5830         res->range.iomode = be32_to_cpup(p++);
5831         res->type = be32_to_cpup(p++);
5832         res->layoutp->len = be32_to_cpup(p);
5833
5834         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5835                 __func__,
5836                 (unsigned long)res->range.offset,
5837                 (unsigned long)res->range.length,
5838                 res->range.iomode,
5839                 res->type,
5840                 res->layoutp->len);
5841
5842         recvd = xdr_read_pages(xdr, res->layoutp->len);
5843         if (res->layoutp->len > recvd) {
5844                 dprintk("NFS: server cheating in layoutget reply: "
5845                                 "layout len %u > recvd %u\n",
5846                                 res->layoutp->len, recvd);
5847                 return -EINVAL;
5848         }
5849
5850         if (layout_count > 1) {
5851                 /* We only handle a length one array at the moment.  Any
5852                  * further entries are just ignored.  Note that this means
5853                  * the client may see a response that is less than the
5854                  * minimum it requested.
5855                  */
5856                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5857                         __func__, layout_count);
5858         }
5859
5860         return 0;
5861 out_overflow:
5862         print_overflow_msg(__func__, xdr);
5863         return -EIO;
5864 }
5865
5866 static int decode_layoutreturn(struct xdr_stream *xdr,
5867                                struct nfs4_layoutreturn_res *res)
5868 {
5869         __be32 *p;
5870         int status;
5871
5872         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5873         if (status)
5874                 return status;
5875         p = xdr_inline_decode(xdr, 4);
5876         if (unlikely(!p))
5877                 goto out_overflow;
5878         res->lrs_present = be32_to_cpup(p);
5879         if (res->lrs_present)
5880                 status = decode_stateid(xdr, &res->stateid);
5881         return status;
5882 out_overflow:
5883         print_overflow_msg(__func__, xdr);
5884         return -EIO;
5885 }
5886
5887 static int decode_layoutcommit(struct xdr_stream *xdr,
5888                                struct rpc_rqst *req,
5889                                struct nfs4_layoutcommit_res *res)
5890 {
5891         __be32 *p;
5892         __u32 sizechanged;
5893         int status;
5894
5895         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5896         res->status = status;
5897         if (status)
5898                 return status;
5899
5900         p = xdr_inline_decode(xdr, 4);
5901         if (unlikely(!p))
5902                 goto out_overflow;
5903         sizechanged = be32_to_cpup(p);
5904
5905         if (sizechanged) {
5906                 /* throw away new size */
5907                 p = xdr_inline_decode(xdr, 8);
5908                 if (unlikely(!p))
5909                         goto out_overflow;
5910         }
5911         return 0;
5912 out_overflow:
5913         print_overflow_msg(__func__, xdr);
5914         return -EIO;
5915 }
5916
5917 static int decode_test_stateid(struct xdr_stream *xdr,
5918                                struct nfs41_test_stateid_res *res)
5919 {
5920         __be32 *p;
5921         int status;
5922         int num_res;
5923
5924         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5925         if (status)
5926                 return status;
5927
5928         p = xdr_inline_decode(xdr, 4);
5929         if (unlikely(!p))
5930                 goto out_overflow;
5931         num_res = be32_to_cpup(p++);
5932         if (num_res != 1)
5933                 goto out;
5934
5935         p = xdr_inline_decode(xdr, 4);
5936         if (unlikely(!p))
5937                 goto out_overflow;
5938         res->status = be32_to_cpup(p++);
5939
5940         return status;
5941 out_overflow:
5942         print_overflow_msg(__func__, xdr);
5943 out:
5944         return -EIO;
5945 }
5946
5947 static int decode_free_stateid(struct xdr_stream *xdr,
5948                                struct nfs41_free_stateid_res *res)
5949 {
5950         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5951         return res->status;
5952 }
5953 #endif /* CONFIG_NFS_V4_1 */
5954
5955 /*
5956  * END OF "GENERIC" DECODE ROUTINES.
5957  */
5958
5959 /*
5960  * Decode OPEN_DOWNGRADE response
5961  */
5962 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5963                                        struct xdr_stream *xdr,
5964                                        struct nfs_closeres *res)
5965 {
5966         struct compound_hdr hdr;
5967         int status;
5968
5969         status = decode_compound_hdr(xdr, &hdr);
5970         if (status)
5971                 goto out;
5972         status = decode_sequence(xdr, &res->seq_res, rqstp);
5973         if (status)
5974                 goto out;
5975         status = decode_putfh(xdr);
5976         if (status)
5977                 goto out;
5978         status = decode_open_downgrade(xdr, res);
5979         if (status != 0)
5980                 goto out;
5981         decode_getfattr(xdr, res->fattr, res->server);
5982 out:
5983         return status;
5984 }
5985
5986 /*
5987  * Decode ACCESS response
5988  */
5989 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5990                                struct nfs4_accessres *res)
5991 {
5992         struct compound_hdr hdr;
5993         int status;
5994
5995         status = decode_compound_hdr(xdr, &hdr);
5996         if (status)
5997                 goto out;
5998         status = decode_sequence(xdr, &res->seq_res, rqstp);
5999         if (status)
6000                 goto out;
6001         status = decode_putfh(xdr);
6002         if (status != 0)
6003                 goto out;
6004         status = decode_access(xdr, &res->supported, &res->access);
6005         if (status != 0)
6006                 goto out;
6007         decode_getfattr(xdr, res->fattr, res->server);
6008 out:
6009         return status;
6010 }
6011
6012 /*
6013  * Decode LOOKUP response
6014  */
6015 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6016                                struct nfs4_lookup_res *res)
6017 {
6018         struct compound_hdr hdr;
6019         int status;
6020
6021         status = decode_compound_hdr(xdr, &hdr);
6022         if (status)
6023                 goto out;
6024         status = decode_sequence(xdr, &res->seq_res, rqstp);
6025         if (status)
6026                 goto out;
6027         status = decode_putfh(xdr);
6028         if (status)
6029                 goto out;
6030         status = decode_lookup(xdr);
6031         if (status)
6032                 goto out;
6033         status = decode_getfh(xdr, res->fh);
6034         if (status)
6035                 goto out;
6036         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6037 out:
6038         return status;
6039 }
6040
6041 /*
6042  * Decode LOOKUP_ROOT response
6043  */
6044 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6045                                     struct xdr_stream *xdr,
6046                                     struct nfs4_lookup_res *res)
6047 {
6048         struct compound_hdr hdr;
6049         int status;
6050
6051         status = decode_compound_hdr(xdr, &hdr);
6052         if (status)
6053                 goto out;
6054         status = decode_sequence(xdr, &res->seq_res, rqstp);
6055         if (status)
6056                 goto out;
6057         status = decode_putrootfh(xdr);
6058         if (status)
6059                 goto out;
6060         status = decode_getfh(xdr, res->fh);
6061         if (status == 0)
6062                 status = decode_getfattr_label(xdr, res->fattr,
6063                                                 res->label, res->server);
6064 out:
6065         return status;
6066 }
6067
6068 /*
6069  * Decode REMOVE response
6070  */
6071 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6072                                struct nfs_removeres *res)
6073 {
6074         struct compound_hdr hdr;
6075         int status;
6076
6077         status = decode_compound_hdr(xdr, &hdr);
6078         if (status)
6079                 goto out;
6080         status = decode_sequence(xdr, &res->seq_res, rqstp);
6081         if (status)
6082                 goto out;
6083         status = decode_putfh(xdr);
6084         if (status)
6085                 goto out;
6086         status = decode_remove(xdr, &res->cinfo);
6087 out:
6088         return status;
6089 }
6090
6091 /*
6092  * Decode RENAME response
6093  */
6094 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6095                                struct nfs_renameres *res)
6096 {
6097         struct compound_hdr hdr;
6098         int status;
6099
6100         status = decode_compound_hdr(xdr, &hdr);
6101         if (status)
6102                 goto out;
6103         status = decode_sequence(xdr, &res->seq_res, rqstp);
6104         if (status)
6105                 goto out;
6106         status = decode_putfh(xdr);
6107         if (status)
6108                 goto out;
6109         status = decode_savefh(xdr);
6110         if (status)
6111                 goto out;
6112         status = decode_putfh(xdr);
6113         if (status)
6114                 goto out;
6115         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6116 out:
6117         return status;
6118 }
6119
6120 /*
6121  * Decode LINK response
6122  */
6123 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6124                              struct nfs4_link_res *res)
6125 {
6126         struct compound_hdr hdr;
6127         int status;
6128
6129         status = decode_compound_hdr(xdr, &hdr);
6130         if (status)
6131                 goto out;
6132         status = decode_sequence(xdr, &res->seq_res, rqstp);
6133         if (status)
6134                 goto out;
6135         status = decode_putfh(xdr);
6136         if (status)
6137                 goto out;
6138         status = decode_savefh(xdr);
6139         if (status)
6140                 goto out;
6141         status = decode_putfh(xdr);
6142         if (status)
6143                 goto out;
6144         status = decode_link(xdr, &res->cinfo);
6145         if (status)
6146                 goto out;
6147         /*
6148          * Note order: OP_LINK leaves the directory as the current
6149          *             filehandle.
6150          */
6151         status = decode_restorefh(xdr);
6152         if (status)
6153                 goto out;
6154         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6155 out:
6156         return status;
6157 }
6158
6159 /*
6160  * Decode CREATE response
6161  */
6162 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6163                                struct nfs4_create_res *res)
6164 {
6165         struct compound_hdr hdr;
6166         int status;
6167
6168         status = decode_compound_hdr(xdr, &hdr);
6169         if (status)
6170                 goto out;
6171         status = decode_sequence(xdr, &res->seq_res, rqstp);
6172         if (status)
6173                 goto out;
6174         status = decode_putfh(xdr);
6175         if (status)
6176                 goto out;
6177         status = decode_create(xdr, &res->dir_cinfo);
6178         if (status)
6179                 goto out;
6180         status = decode_getfh(xdr, res->fh);
6181         if (status)
6182                 goto out;
6183         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6184 out:
6185         return status;
6186 }
6187
6188 /*
6189  * Decode SYMLINK response
6190  */
6191 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6192                                 struct nfs4_create_res *res)
6193 {
6194         return nfs4_xdr_dec_create(rqstp, xdr, res);
6195 }
6196
6197 /*
6198  * Decode GETATTR response
6199  */
6200 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6201                                 struct nfs4_getattr_res *res)
6202 {
6203         struct compound_hdr hdr;
6204         int status;
6205
6206         status = decode_compound_hdr(xdr, &hdr);
6207         if (status)
6208                 goto out;
6209         status = decode_sequence(xdr, &res->seq_res, rqstp);
6210         if (status)
6211                 goto out;
6212         status = decode_putfh(xdr);
6213         if (status)
6214                 goto out;
6215         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6216 out:
6217         return status;
6218 }
6219
6220 /*
6221  * Encode an SETACL request
6222  */
6223 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6224                                 struct nfs_setaclargs *args)
6225 {
6226         struct compound_hdr hdr = {
6227                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6228         };
6229
6230         encode_compound_hdr(xdr, req, &hdr);
6231         encode_sequence(xdr, &args->seq_args, &hdr);
6232         encode_putfh(xdr, args->fh, &hdr);
6233         encode_setacl(xdr, args, &hdr);
6234         encode_nops(&hdr);
6235 }
6236
6237 /*
6238  * Decode SETACL response
6239  */
6240 static int
6241 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6242                     struct nfs_setaclres *res)
6243 {
6244         struct compound_hdr hdr;
6245         int status;
6246
6247         status = decode_compound_hdr(xdr, &hdr);
6248         if (status)
6249                 goto out;
6250         status = decode_sequence(xdr, &res->seq_res, rqstp);
6251         if (status)
6252                 goto out;
6253         status = decode_putfh(xdr);
6254         if (status)
6255                 goto out;
6256         status = decode_setattr(xdr);
6257 out:
6258         return status;
6259 }
6260
6261 /*
6262  * Decode GETACL response
6263  */
6264 static int
6265 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6266                     struct nfs_getaclres *res)
6267 {
6268         struct compound_hdr hdr;
6269         int status;
6270
6271         if (res->acl_scratch != NULL) {
6272                 void *p = page_address(res->acl_scratch);
6273                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6274         }
6275         status = decode_compound_hdr(xdr, &hdr);
6276         if (status)
6277                 goto out;
6278         status = decode_sequence(xdr, &res->seq_res, rqstp);
6279         if (status)
6280                 goto out;
6281         status = decode_putfh(xdr);
6282         if (status)
6283                 goto out;
6284         status = decode_getacl(xdr, rqstp, res);
6285
6286 out:
6287         return status;
6288 }
6289
6290 /*
6291  * Decode CLOSE response
6292  */
6293 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6294                               struct nfs_closeres *res)
6295 {
6296         struct compound_hdr hdr;
6297         int status;
6298
6299         status = decode_compound_hdr(xdr, &hdr);
6300         if (status)
6301                 goto out;
6302         status = decode_sequence(xdr, &res->seq_res, rqstp);
6303         if (status)
6304                 goto out;
6305         status = decode_putfh(xdr);
6306         if (status)
6307                 goto out;
6308         status = decode_close(xdr, res);
6309         if (status != 0)
6310                 goto out;
6311         /*
6312          * Note: Server may do delete on close for this file
6313          *      in which case the getattr call will fail with
6314          *      an ESTALE error. Shouldn't be a problem,
6315          *      though, since fattr->valid will remain unset.
6316          */
6317         decode_getfattr(xdr, res->fattr, res->server);
6318 out:
6319         return status;
6320 }
6321
6322 /*
6323  * Decode OPEN response
6324  */
6325 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6326                              struct nfs_openres *res)
6327 {
6328         struct compound_hdr hdr;
6329         int status;
6330
6331         status = decode_compound_hdr(xdr, &hdr);
6332         if (status)
6333                 goto out;
6334         status = decode_sequence(xdr, &res->seq_res, rqstp);
6335         if (status)
6336                 goto out;
6337         status = decode_putfh(xdr);
6338         if (status)
6339                 goto out;
6340         status = decode_open(xdr, res);
6341         if (status)
6342                 goto out;
6343         status = decode_getfh(xdr, &res->fh);
6344         if (status)
6345                 goto out;
6346         if (res->access_request)
6347                 decode_access(xdr, &res->access_supported, &res->access_result);
6348         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6349 out:
6350         return status;
6351 }
6352
6353 /*
6354  * Decode OPEN_CONFIRM response
6355  */
6356 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6357                                      struct xdr_stream *xdr,
6358                                      struct nfs_open_confirmres *res)
6359 {
6360         struct compound_hdr hdr;
6361         int status;
6362
6363         status = decode_compound_hdr(xdr, &hdr);
6364         if (status)
6365                 goto out;
6366         status = decode_putfh(xdr);
6367         if (status)
6368                 goto out;
6369         status = decode_open_confirm(xdr, res);
6370 out:
6371         return status;
6372 }
6373
6374 /*
6375  * Decode OPEN response
6376  */
6377 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6378                                     struct xdr_stream *xdr,
6379                                     struct nfs_openres *res)
6380 {
6381         struct compound_hdr hdr;
6382         int status;
6383
6384         status = decode_compound_hdr(xdr, &hdr);
6385         if (status)
6386                 goto out;
6387         status = decode_sequence(xdr, &res->seq_res, rqstp);
6388         if (status)
6389                 goto out;
6390         status = decode_putfh(xdr);
6391         if (status)
6392                 goto out;
6393         status = decode_open(xdr, res);
6394         if (status)
6395                 goto out;
6396         if (res->access_request)
6397                 decode_access(xdr, &res->access_supported, &res->access_result);
6398         decode_getfattr(xdr, res->f_attr, res->server);
6399 out:
6400         return status;
6401 }
6402
6403 /*
6404  * Decode SETATTR response
6405  */
6406 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6407                                 struct xdr_stream *xdr,
6408                                 struct nfs_setattrres *res)
6409 {
6410         struct compound_hdr hdr;
6411         int status;
6412
6413         status = decode_compound_hdr(xdr, &hdr);
6414         if (status)
6415                 goto out;
6416         status = decode_sequence(xdr, &res->seq_res, rqstp);
6417         if (status)
6418                 goto out;
6419         status = decode_putfh(xdr);
6420         if (status)
6421                 goto out;
6422         status = decode_setattr(xdr);
6423         if (status)
6424                 goto out;
6425         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6426 out:
6427         return status;
6428 }
6429
6430 /*
6431  * Decode LOCK response
6432  */
6433 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6434                              struct nfs_lock_res *res)
6435 {
6436         struct compound_hdr hdr;
6437         int status;
6438
6439         status = decode_compound_hdr(xdr, &hdr);
6440         if (status)
6441                 goto out;
6442         status = decode_sequence(xdr, &res->seq_res, rqstp);
6443         if (status)
6444                 goto out;
6445         status = decode_putfh(xdr);
6446         if (status)
6447                 goto out;
6448         status = decode_lock(xdr, res);
6449 out:
6450         return status;
6451 }
6452
6453 /*
6454  * Decode LOCKT response
6455  */
6456 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6457                               struct nfs_lockt_res *res)
6458 {
6459         struct compound_hdr hdr;
6460         int status;
6461
6462         status = decode_compound_hdr(xdr, &hdr);
6463         if (status)
6464                 goto out;
6465         status = decode_sequence(xdr, &res->seq_res, rqstp);
6466         if (status)
6467                 goto out;
6468         status = decode_putfh(xdr);
6469         if (status)
6470                 goto out;
6471         status = decode_lockt(xdr, res);
6472 out:
6473         return status;
6474 }
6475
6476 /*
6477  * Decode LOCKU response
6478  */
6479 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6480                               struct nfs_locku_res *res)
6481 {
6482         struct compound_hdr hdr;
6483         int status;
6484
6485         status = decode_compound_hdr(xdr, &hdr);
6486         if (status)
6487                 goto out;
6488         status = decode_sequence(xdr, &res->seq_res, rqstp);
6489         if (status)
6490                 goto out;
6491         status = decode_putfh(xdr);
6492         if (status)
6493                 goto out;
6494         status = decode_locku(xdr, res);
6495 out:
6496         return status;
6497 }
6498
6499 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6500                                           struct xdr_stream *xdr, void *dummy)
6501 {
6502         struct compound_hdr hdr;
6503         int status;
6504
6505         status = decode_compound_hdr(xdr, &hdr);
6506         if (!status)
6507                 status = decode_release_lockowner(xdr);
6508         return status;
6509 }
6510
6511 /*
6512  * Decode READLINK response
6513  */
6514 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6515                                  struct xdr_stream *xdr,
6516                                  struct nfs4_readlink_res *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_readlink(xdr, rqstp);
6531 out:
6532         return status;
6533 }
6534
6535 /*
6536  * Decode READDIR response
6537  */
6538 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6539                                 struct nfs4_readdir_res *res)
6540 {
6541         struct compound_hdr hdr;
6542         int status;
6543
6544         status = decode_compound_hdr(xdr, &hdr);
6545         if (status)
6546                 goto out;
6547         status = decode_sequence(xdr, &res->seq_res, rqstp);
6548         if (status)
6549                 goto out;
6550         status = decode_putfh(xdr);
6551         if (status)
6552                 goto out;
6553         status = decode_readdir(xdr, rqstp, res);
6554 out:
6555         return status;
6556 }
6557
6558 /*
6559  * Decode Read response
6560  */
6561 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6562                              struct nfs_pgio_res *res)
6563 {
6564         struct compound_hdr hdr;
6565         int status;
6566
6567         status = decode_compound_hdr(xdr, &hdr);
6568         if (status)
6569                 goto out;
6570         status = decode_sequence(xdr, &res->seq_res, rqstp);
6571         if (status)
6572                 goto out;
6573         status = decode_putfh(xdr);
6574         if (status)
6575                 goto out;
6576         status = decode_read(xdr, rqstp, res);
6577         if (!status)
6578                 status = res->count;
6579 out:
6580         return status;
6581 }
6582
6583 /*
6584  * Decode WRITE response
6585  */
6586 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6587                               struct nfs_pgio_res *res)
6588 {
6589         struct compound_hdr hdr;
6590         int status;
6591
6592         status = decode_compound_hdr(xdr, &hdr);
6593         if (status)
6594                 goto out;
6595         status = decode_sequence(xdr, &res->seq_res, rqstp);
6596         if (status)
6597                 goto out;
6598         status = decode_putfh(xdr);
6599         if (status)
6600                 goto out;
6601         status = decode_write(xdr, res);
6602         if (status)
6603                 goto out;
6604         if (res->fattr)
6605                 decode_getfattr(xdr, res->fattr, res->server);
6606         if (!status)
6607                 status = res->count;
6608 out:
6609         return status;
6610 }
6611
6612 /*
6613  * Decode COMMIT response
6614  */
6615 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6616                                struct nfs_commitres *res)
6617 {
6618         struct compound_hdr hdr;
6619         int status;
6620
6621         status = decode_compound_hdr(xdr, &hdr);
6622         if (status)
6623                 goto out;
6624         status = decode_sequence(xdr, &res->seq_res, rqstp);
6625         if (status)
6626                 goto out;
6627         status = decode_putfh(xdr);
6628         if (status)
6629                 goto out;
6630         status = decode_commit(xdr, res);
6631 out:
6632         return status;
6633 }
6634
6635 /*
6636  * Decode FSINFO response
6637  */
6638 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6639                                struct nfs4_fsinfo_res *res)
6640 {
6641         struct compound_hdr hdr;
6642         int status;
6643
6644         status = decode_compound_hdr(xdr, &hdr);
6645         if (!status)
6646                 status = decode_sequence(xdr, &res->seq_res, req);
6647         if (!status)
6648                 status = decode_putfh(xdr);
6649         if (!status)
6650                 status = decode_fsinfo(xdr, res->fsinfo);
6651         return status;
6652 }
6653
6654 /*
6655  * Decode PATHCONF response
6656  */
6657 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6658                                  struct nfs4_pathconf_res *res)
6659 {
6660         struct compound_hdr hdr;
6661         int status;
6662
6663         status = decode_compound_hdr(xdr, &hdr);
6664         if (!status)
6665                 status = decode_sequence(xdr, &res->seq_res, req);
6666         if (!status)
6667                 status = decode_putfh(xdr);
6668         if (!status)
6669                 status = decode_pathconf(xdr, res->pathconf);
6670         return status;
6671 }
6672
6673 /*
6674  * Decode STATFS response
6675  */
6676 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6677                                struct nfs4_statfs_res *res)
6678 {
6679         struct compound_hdr hdr;
6680         int status;
6681
6682         status = decode_compound_hdr(xdr, &hdr);
6683         if (!status)
6684                 status = decode_sequence(xdr, &res->seq_res, req);
6685         if (!status)
6686                 status = decode_putfh(xdr);
6687         if (!status)
6688                 status = decode_statfs(xdr, res->fsstat);
6689         return status;
6690 }
6691
6692 /*
6693  * Decode GETATTR_BITMAP response
6694  */
6695 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6696                                     struct xdr_stream *xdr,
6697                                     struct nfs4_server_caps_res *res)
6698 {
6699         struct compound_hdr hdr;
6700         int status;
6701
6702         status = decode_compound_hdr(xdr, &hdr);
6703         if (status)
6704                 goto out;
6705         status = decode_sequence(xdr, &res->seq_res, req);
6706         if (status)
6707                 goto out;
6708         status = decode_putfh(xdr);
6709         if (status)
6710                 goto out;
6711         status = decode_server_caps(xdr, res);
6712 out:
6713         return status;
6714 }
6715
6716 /*
6717  * Decode RENEW response
6718  */
6719 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6720                               void *__unused)
6721 {
6722         struct compound_hdr hdr;
6723         int status;
6724
6725         status = decode_compound_hdr(xdr, &hdr);
6726         if (!status)
6727                 status = decode_renew(xdr);
6728         return status;
6729 }
6730
6731 /*
6732  * Decode SETCLIENTID response
6733  */
6734 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6735                                     struct xdr_stream *xdr,
6736                                     struct nfs4_setclientid_res *res)
6737 {
6738         struct compound_hdr hdr;
6739         int status;
6740
6741         status = decode_compound_hdr(xdr, &hdr);
6742         if (!status)
6743                 status = decode_setclientid(xdr, res);
6744         return status;
6745 }
6746
6747 /*
6748  * Decode SETCLIENTID_CONFIRM response
6749  */
6750 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6751                                             struct xdr_stream *xdr)
6752 {
6753         struct compound_hdr hdr;
6754         int status;
6755
6756         status = decode_compound_hdr(xdr, &hdr);
6757         if (!status)
6758                 status = decode_setclientid_confirm(xdr);
6759         return status;
6760 }
6761
6762 /*
6763  * Decode DELEGRETURN response
6764  */
6765 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6766                                     struct xdr_stream *xdr,
6767                                     struct nfs4_delegreturnres *res)
6768 {
6769         struct compound_hdr hdr;
6770         int status;
6771
6772         status = decode_compound_hdr(xdr, &hdr);
6773         if (status)
6774                 goto out;
6775         status = decode_sequence(xdr, &res->seq_res, rqstp);
6776         if (status)
6777                 goto out;
6778         status = decode_putfh(xdr);
6779         if (status != 0)
6780                 goto out;
6781         status = decode_getfattr(xdr, res->fattr, res->server);
6782         if (status != 0)
6783                 goto out;
6784         status = decode_delegreturn(xdr);
6785 out:
6786         return status;
6787 }
6788
6789 /*
6790  * Decode FS_LOCATIONS response
6791  */
6792 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6793                                      struct xdr_stream *xdr,
6794                                      struct nfs4_fs_locations_res *res)
6795 {
6796         struct compound_hdr hdr;
6797         int status;
6798
6799         status = decode_compound_hdr(xdr, &hdr);
6800         if (status)
6801                 goto out;
6802         status = decode_sequence(xdr, &res->seq_res, req);
6803         if (status)
6804                 goto out;
6805         status = decode_putfh(xdr);
6806         if (status)
6807                 goto out;
6808         if (res->migration) {
6809                 xdr_enter_page(xdr, PAGE_SIZE);
6810                 status = decode_getfattr_generic(xdr,
6811                                         &res->fs_locations->fattr,
6812                                          NULL, res->fs_locations,
6813                                          NULL, res->fs_locations->server);
6814                 if (status)
6815                         goto out;
6816                 if (res->renew)
6817                         status = decode_renew(xdr);
6818         } else {
6819                 status = decode_lookup(xdr);
6820                 if (status)
6821                         goto out;
6822                 xdr_enter_page(xdr, PAGE_SIZE);
6823                 status = decode_getfattr_generic(xdr,
6824                                         &res->fs_locations->fattr,
6825                                          NULL, res->fs_locations,
6826                                          NULL, res->fs_locations->server);
6827         }
6828 out:
6829         return status;
6830 }
6831
6832 /*
6833  * Decode SECINFO response
6834  */
6835 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6836                                 struct xdr_stream *xdr,
6837                                 struct nfs4_secinfo_res *res)
6838 {
6839         struct compound_hdr hdr;
6840         int status;
6841
6842         status = decode_compound_hdr(xdr, &hdr);
6843         if (status)
6844                 goto out;
6845         status = decode_sequence(xdr, &res->seq_res, rqstp);
6846         if (status)
6847                 goto out;
6848         status = decode_putfh(xdr);
6849         if (status)
6850                 goto out;
6851         status = decode_secinfo(xdr, res);
6852 out:
6853         return status;
6854 }
6855
6856 /*
6857  * Decode FSID_PRESENT response
6858  */
6859 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6860                                      struct xdr_stream *xdr,
6861                                      struct nfs4_fsid_present_res *res)
6862 {
6863         struct compound_hdr hdr;
6864         int status;
6865
6866         status = decode_compound_hdr(xdr, &hdr);
6867         if (status)
6868                 goto out;
6869         status = decode_sequence(xdr, &res->seq_res, rqstp);
6870         if (status)
6871                 goto out;
6872         status = decode_putfh(xdr);
6873         if (status)
6874                 goto out;
6875         status = decode_getfh(xdr, res->fh);
6876         if (status)
6877                 goto out;
6878         if (res->renew)
6879                 status = decode_renew(xdr);
6880 out:
6881         return status;
6882 }
6883
6884 #if defined(CONFIG_NFS_V4_1)
6885 /*
6886  * Decode BIND_CONN_TO_SESSION response
6887  */
6888 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6889                                         struct xdr_stream *xdr,
6890                                         void *res)
6891 {
6892         struct compound_hdr hdr;
6893         int status;
6894
6895         status = decode_compound_hdr(xdr, &hdr);
6896         if (!status)
6897                 status = decode_bind_conn_to_session(xdr, res);
6898         return status;
6899 }
6900
6901 /*
6902  * Decode EXCHANGE_ID response
6903  */
6904 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6905                                     struct xdr_stream *xdr,
6906                                     void *res)
6907 {
6908         struct compound_hdr hdr;
6909         int status;
6910
6911         status = decode_compound_hdr(xdr, &hdr);
6912         if (!status)
6913                 status = decode_exchange_id(xdr, res);
6914         return status;
6915 }
6916
6917 /*
6918  * Decode CREATE_SESSION response
6919  */
6920 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6921                                        struct xdr_stream *xdr,
6922                                        struct nfs41_create_session_res *res)
6923 {
6924         struct compound_hdr hdr;
6925         int status;
6926
6927         status = decode_compound_hdr(xdr, &hdr);
6928         if (!status)
6929                 status = decode_create_session(xdr, res);
6930         return status;
6931 }
6932
6933 /*
6934  * Decode DESTROY_SESSION response
6935  */
6936 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6937                                         struct xdr_stream *xdr,
6938                                         void *res)
6939 {
6940         struct compound_hdr hdr;
6941         int status;
6942
6943         status = decode_compound_hdr(xdr, &hdr);
6944         if (!status)
6945                 status = decode_destroy_session(xdr, res);
6946         return status;
6947 }
6948
6949 /*
6950  * Decode DESTROY_CLIENTID response
6951  */
6952 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6953                                         struct xdr_stream *xdr,
6954                                         void *res)
6955 {
6956         struct compound_hdr hdr;
6957         int status;
6958
6959         status = decode_compound_hdr(xdr, &hdr);
6960         if (!status)
6961                 status = decode_destroy_clientid(xdr, res);
6962         return status;
6963 }
6964
6965 /*
6966  * Decode SEQUENCE response
6967  */
6968 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6969                                  struct xdr_stream *xdr,
6970                                  struct nfs4_sequence_res *res)
6971 {
6972         struct compound_hdr hdr;
6973         int status;
6974
6975         status = decode_compound_hdr(xdr, &hdr);
6976         if (!status)
6977                 status = decode_sequence(xdr, res, rqstp);
6978         return status;
6979 }
6980
6981 /*
6982  * Decode GET_LEASE_TIME response
6983  */
6984 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6985                                        struct xdr_stream *xdr,
6986                                        struct nfs4_get_lease_time_res *res)
6987 {
6988         struct compound_hdr hdr;
6989         int status;
6990
6991         status = decode_compound_hdr(xdr, &hdr);
6992         if (!status)
6993                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6994         if (!status)
6995                 status = decode_putrootfh(xdr);
6996         if (!status)
6997                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6998         return status;
6999 }
7000
7001 /*
7002  * Decode RECLAIM_COMPLETE response
7003  */
7004 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7005                                          struct xdr_stream *xdr,
7006                                          struct nfs41_reclaim_complete_res *res)
7007 {
7008         struct compound_hdr hdr;
7009         int status;
7010
7011         status = decode_compound_hdr(xdr, &hdr);
7012         if (!status)
7013                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7014         if (!status)
7015                 status = decode_reclaim_complete(xdr, NULL);
7016         return status;
7017 }
7018
7019 /*
7020  * Decode GETDEVINFO response
7021  */
7022 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7023                                       struct xdr_stream *xdr,
7024                                       struct nfs4_getdeviceinfo_res *res)
7025 {
7026         struct compound_hdr hdr;
7027         int status;
7028
7029         status = decode_compound_hdr(xdr, &hdr);
7030         if (status != 0)
7031                 goto out;
7032         status = decode_sequence(xdr, &res->seq_res, rqstp);
7033         if (status != 0)
7034                 goto out;
7035         status = decode_getdeviceinfo(xdr, res->pdev);
7036 out:
7037         return status;
7038 }
7039
7040 /*
7041  * Decode LAYOUTGET response
7042  */
7043 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7044                                   struct xdr_stream *xdr,
7045                                   struct nfs4_layoutget_res *res)
7046 {
7047         struct compound_hdr hdr;
7048         int status;
7049
7050         status = decode_compound_hdr(xdr, &hdr);
7051         if (status)
7052                 goto out;
7053         status = decode_sequence(xdr, &res->seq_res, rqstp);
7054         if (status)
7055                 goto out;
7056         status = decode_putfh(xdr);
7057         if (status)
7058                 goto out;
7059         status = decode_layoutget(xdr, rqstp, res);
7060 out:
7061         return status;
7062 }
7063
7064 /*
7065  * Decode LAYOUTRETURN response
7066  */
7067 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7068                                      struct xdr_stream *xdr,
7069                                      struct nfs4_layoutreturn_res *res)
7070 {
7071         struct compound_hdr hdr;
7072         int status;
7073
7074         status = decode_compound_hdr(xdr, &hdr);
7075         if (status)
7076                 goto out;
7077         status = decode_sequence(xdr, &res->seq_res, rqstp);
7078         if (status)
7079                 goto out;
7080         status = decode_putfh(xdr);
7081         if (status)
7082                 goto out;
7083         status = decode_layoutreturn(xdr, res);
7084 out:
7085         return status;
7086 }
7087
7088 /*
7089  * Decode LAYOUTCOMMIT response
7090  */
7091 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7092                                      struct xdr_stream *xdr,
7093                                      struct nfs4_layoutcommit_res *res)
7094 {
7095         struct compound_hdr hdr;
7096         int status;
7097
7098         status = decode_compound_hdr(xdr, &hdr);
7099         if (status)
7100                 goto out;
7101         status = decode_sequence(xdr, &res->seq_res, rqstp);
7102         if (status)
7103                 goto out;
7104         status = decode_putfh(xdr);
7105         if (status)
7106                 goto out;
7107         status = decode_layoutcommit(xdr, rqstp, res);
7108         if (status)
7109                 goto out;
7110         decode_getfattr(xdr, res->fattr, res->server);
7111 out:
7112         return status;
7113 }
7114
7115 /*
7116  * Decode SECINFO_NO_NAME response
7117  */
7118 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7119                                         struct xdr_stream *xdr,
7120                                         struct nfs4_secinfo_res *res)
7121 {
7122         struct compound_hdr hdr;
7123         int status;
7124
7125         status = decode_compound_hdr(xdr, &hdr);
7126         if (status)
7127                 goto out;
7128         status = decode_sequence(xdr, &res->seq_res, rqstp);
7129         if (status)
7130                 goto out;
7131         status = decode_putrootfh(xdr);
7132         if (status)
7133                 goto out;
7134         status = decode_secinfo_no_name(xdr, res);
7135 out:
7136         return status;
7137 }
7138
7139 /*
7140  * Decode TEST_STATEID response
7141  */
7142 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7143                                      struct xdr_stream *xdr,
7144                                      struct nfs41_test_stateid_res *res)
7145 {
7146         struct compound_hdr hdr;
7147         int status;
7148
7149         status = decode_compound_hdr(xdr, &hdr);
7150         if (status)
7151                 goto out;
7152         status = decode_sequence(xdr, &res->seq_res, rqstp);
7153         if (status)
7154                 goto out;
7155         status = decode_test_stateid(xdr, res);
7156 out:
7157         return status;
7158 }
7159
7160 /*
7161  * Decode FREE_STATEID response
7162  */
7163 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7164                                      struct xdr_stream *xdr,
7165                                      struct nfs41_free_stateid_res *res)
7166 {
7167         struct compound_hdr hdr;
7168         int status;
7169
7170         status = decode_compound_hdr(xdr, &hdr);
7171         if (status)
7172                 goto out;
7173         status = decode_sequence(xdr, &res->seq_res, rqstp);
7174         if (status)
7175                 goto out;
7176         status = decode_free_stateid(xdr, res);
7177 out:
7178         return status;
7179 }
7180 #endif /* CONFIG_NFS_V4_1 */
7181
7182 /**
7183  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7184  *                      the local page cache.
7185  * @xdr: XDR stream where entry resides
7186  * @entry: buffer to fill in with entry data
7187  * @plus: boolean indicating whether this should be a readdirplus entry
7188  *
7189  * Returns zero if successful, otherwise a negative errno value is
7190  * returned.
7191  *
7192  * This function is not invoked during READDIR reply decoding, but
7193  * rather whenever an application invokes the getdents(2) system call
7194  * on a directory already in our cache.
7195  */
7196 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7197                        int plus)
7198 {
7199         unsigned int savep;
7200         uint32_t bitmap[3] = {0};
7201         uint32_t len;
7202         __be32 *p = xdr_inline_decode(xdr, 4);
7203         if (unlikely(!p))
7204                 goto out_overflow;
7205         if (*p == xdr_zero) {
7206                 p = xdr_inline_decode(xdr, 4);
7207                 if (unlikely(!p))
7208                         goto out_overflow;
7209                 if (*p == xdr_zero)
7210                         return -EAGAIN;
7211                 entry->eof = 1;
7212                 return -EBADCOOKIE;
7213         }
7214
7215         p = xdr_inline_decode(xdr, 12);
7216         if (unlikely(!p))
7217                 goto out_overflow;
7218         entry->prev_cookie = entry->cookie;
7219         p = xdr_decode_hyper(p, &entry->cookie);
7220         entry->len = be32_to_cpup(p);
7221
7222         p = xdr_inline_decode(xdr, entry->len);
7223         if (unlikely(!p))
7224                 goto out_overflow;
7225         entry->name = (const char *) p;
7226
7227         /*
7228          * In case the server doesn't return an inode number,
7229          * we fake one here.  (We don't use inode number 0,
7230          * since glibc seems to choke on it...)
7231          */
7232         entry->ino = 1;
7233         entry->fattr->valid = 0;
7234
7235         if (decode_attr_bitmap(xdr, bitmap) < 0)
7236                 goto out_overflow;
7237
7238         if (decode_attr_length(xdr, &len, &savep) < 0)
7239                 goto out_overflow;
7240
7241         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7242                         NULL, entry->label, entry->server) < 0)
7243                 goto out_overflow;
7244         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7245                 entry->ino = entry->fattr->mounted_on_fileid;
7246         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7247                 entry->ino = entry->fattr->fileid;
7248
7249         entry->d_type = DT_UNKNOWN;
7250         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7251                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7252
7253         return 0;
7254
7255 out_overflow:
7256         print_overflow_msg(__func__, xdr);
7257         return -EAGAIN;
7258 }
7259
7260 /*
7261  * We need to translate between nfs status return values and
7262  * the local errno values which may not be the same.
7263  */
7264 static struct {
7265         int stat;
7266         int errno;
7267 } nfs_errtbl[] = {
7268         { NFS4_OK,              0               },
7269         { NFS4ERR_PERM,         -EPERM          },
7270         { NFS4ERR_NOENT,        -ENOENT         },
7271         { NFS4ERR_IO,           -errno_NFSERR_IO},
7272         { NFS4ERR_NXIO,         -ENXIO          },
7273         { NFS4ERR_ACCESS,       -EACCES         },
7274         { NFS4ERR_EXIST,        -EEXIST         },
7275         { NFS4ERR_XDEV,         -EXDEV          },
7276         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7277         { NFS4ERR_ISDIR,        -EISDIR         },
7278         { NFS4ERR_INVAL,        -EINVAL         },
7279         { NFS4ERR_FBIG,         -EFBIG          },
7280         { NFS4ERR_NOSPC,        -ENOSPC         },
7281         { NFS4ERR_ROFS,         -EROFS          },
7282         { NFS4ERR_MLINK,        -EMLINK         },
7283         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7284         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7285         { NFS4ERR_DQUOT,        -EDQUOT         },
7286         { NFS4ERR_STALE,        -ESTALE         },
7287         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7288         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7289         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7290         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7291         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7292         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7293         { NFS4ERR_LOCKED,       -EAGAIN         },
7294         { NFS4ERR_SYMLINK,      -ELOOP          },
7295         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7296         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7297         { -1,                   -EIO            }
7298 };
7299
7300 /*
7301  * Convert an NFS error code to a local one.
7302  * This one is used jointly by NFSv2 and NFSv3.
7303  */
7304 static int
7305 nfs4_stat_to_errno(int stat)
7306 {
7307         int i;
7308         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7309                 if (nfs_errtbl[i].stat == stat)
7310                         return nfs_errtbl[i].errno;
7311         }
7312         if (stat <= 10000 || stat > 10100) {
7313                 /* The server is looney tunes. */
7314                 return -EREMOTEIO;
7315         }
7316         /* If we cannot translate the error, the recovery routines should
7317          * handle it.
7318          * Note: remaining NFSv4 error codes have values > 10000, so should
7319          * not conflict with native Linux error codes.
7320          */
7321         return -stat;
7322 }
7323
7324 #define PROC(proc, argtype, restype)                            \
7325 [NFSPROC4_CLNT_##proc] = {                                      \
7326         .p_proc   = NFSPROC4_COMPOUND,                          \
7327         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7328         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7329         .p_arglen = NFS4_##argtype##_sz,                        \
7330         .p_replen = NFS4_##restype##_sz,                        \
7331         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7332         .p_name   = #proc,                                      \
7333 }
7334
7335 struct rpc_procinfo     nfs4_procedures[] = {
7336         PROC(READ,              enc_read,               dec_read),
7337         PROC(WRITE,             enc_write,              dec_write),
7338         PROC(COMMIT,            enc_commit,             dec_commit),
7339         PROC(OPEN,              enc_open,               dec_open),
7340         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7341         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7342         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7343         PROC(CLOSE,             enc_close,              dec_close),
7344         PROC(SETATTR,           enc_setattr,            dec_setattr),
7345         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7346         PROC(RENEW,             enc_renew,              dec_renew),
7347         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7348         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7349         PROC(LOCK,              enc_lock,               dec_lock),
7350         PROC(LOCKT,             enc_lockt,              dec_lockt),
7351         PROC(LOCKU,             enc_locku,              dec_locku),
7352         PROC(ACCESS,            enc_access,             dec_access),
7353         PROC(GETATTR,           enc_getattr,            dec_getattr),
7354         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7355         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7356         PROC(REMOVE,            enc_remove,             dec_remove),
7357         PROC(RENAME,            enc_rename,             dec_rename),
7358         PROC(LINK,              enc_link,               dec_link),
7359         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7360         PROC(CREATE,            enc_create,             dec_create),
7361         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7362         PROC(STATFS,            enc_statfs,             dec_statfs),
7363         PROC(READLINK,          enc_readlink,           dec_readlink),
7364         PROC(READDIR,           enc_readdir,            dec_readdir),
7365         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7366         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7367         PROC(GETACL,            enc_getacl,             dec_getacl),
7368         PROC(SETACL,            enc_setacl,             dec_setacl),
7369         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7370         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7371         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7372         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7373 #if defined(CONFIG_NFS_V4_1)
7374         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7375         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7376         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7377         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7378         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7379         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7380         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7381         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7382         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7383         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7384         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7385         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7386         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7387         PROC(BIND_CONN_TO_SESSION,
7388                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7389         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7390 #endif /* CONFIG_NFS_V4_1 */
7391 };
7392
7393 const struct rpc_version nfs_version4 = {
7394         .number                 = 4,
7395         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7396         .procs                  = nfs4_procedures
7397 };
7398
7399 /*
7400  * Local variables:
7401  *  c-basic-offset: 8
7402  * End:
7403  */