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
  56 #include "nfs4_fs.h"
  57 #include "nfs4trace.h"
  58 #include "internal.h"
  59 #include "nfs4idmap.h"
  60 #include "nfs4session.h"
  61 #include "pnfs.h"
  62 #include "netns.h"
  63
  64 #define NFSDBG_FACILITY         NFSDBG_XDR
  65
  66 /* Mapping from NFS error code to "errno" error code. */
  67 #define errno_NFSERR_IO         EIO
  68
  69 struct compound_hdr;
  70 static int nfs4_stat_to_errno(int);
  71 static void encode_layoutget(struct xdr_stream *xdr,
  72                              const struct nfs4_layoutget_args *args,
  73                              struct compound_hdr *hdr);
  74 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
  75                              struct nfs4_layoutget_res *res);
  76
  77 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  78 #ifdef DEBUG
  79 #define NFS4_MAXTAGLEN          20
  80 #else
  81 #define NFS4_MAXTAGLEN          0
  82 #endif
  83
  84 /* lock,open owner id:
  85  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  86  */
  87 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  88 #define lock_owner_id_maxsz     (1 + 1 + 4)
  89 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  90 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  91 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  92 #define op_encode_hdr_maxsz     (1)
  93 #define op_decode_hdr_maxsz     (2)
  94 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  95 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  96 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  97 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  98 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  99                                 (NFS4_FHSIZE >> 2))
 100 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
 101 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 102 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 103 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 104 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 105                                 ((3+NFS4_FHSIZE) >> 2))
 106 #define nfs4_fattr_bitmap_maxsz 4
 107 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 108 #define nfstime4_maxsz          (3)
 109 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 110 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 111 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 112 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 113 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 114 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 115 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 116 #else
 117 #define nfs4_label_maxsz        0
 118 #endif
 119 /* We support only one layout type per file system */
 120 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 121 /* This is based on getfattr, which uses the most attributes: */
 122 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 123                                 3*nfstime4_maxsz + \
 124                                 nfs4_owner_maxsz + \
 125                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 126                                  decode_mdsthreshold_maxsz))
 127 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 128                                 nfs4_fattr_value_maxsz)
 129 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 130 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 131                                  1 + 2 + 1 + \
 132                                 nfs4_owner_maxsz + \
 133                                 nfs4_group_maxsz + \
 134                                 nfs4_label_maxsz + \
 135                                 1 + nfstime4_maxsz + \
 136                                 1 + nfstime4_maxsz)
 137 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 138 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 139 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 140 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 141 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 142 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 143  * layout types will be returned.
 144  */
 145 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 146                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 147 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 148 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 149 #define encode_setclientid_maxsz \
 150                                 (op_encode_hdr_maxsz + \
 151                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 152                                 /* client name */ \
 153                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 154                                 1 /* sc_prog */ + \
 155                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 156                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 157                                 1) /* sc_cb_ident */
 158 #define decode_setclientid_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                 2 /* clientid */ + \
 161                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 162                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 163                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 164 #define encode_setclientid_confirm_maxsz \
 165                                 (op_encode_hdr_maxsz + \
 166                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 167 #define decode_setclientid_confirm_maxsz \
 168                                 (op_decode_hdr_maxsz)
 169 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 170 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 171 #define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 172 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 173 #define encode_share_access_maxsz \
 174                                 (2)
 175 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 176 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 177 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 178 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 179                                 2 + encode_share_access_maxsz + 2 + \
 180                                 open_owner_id_maxsz + \
 181                                 encode_opentype_maxsz + \
 182                                 encode_claim_null_maxsz)
 183 #define decode_space_limit_maxsz        (3)
 184 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 185 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 186                                 decode_space_limit_maxsz + \
 187                                 decode_ace_maxsz)
 188 #define decode_change_info_maxsz        (5)
 189 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 190                                 decode_stateid_maxsz + \
 191                                 decode_change_info_maxsz + 1 + \
 192                                 nfs4_fattr_bitmap_maxsz + \
 193                                 decode_delegation_maxsz)
 194 #define encode_open_confirm_maxsz \
 195                                 (op_encode_hdr_maxsz + \
 196                                  encode_stateid_maxsz + 1)
 197 #define decode_open_confirm_maxsz \
 198                                 (op_decode_hdr_maxsz + \
 199                                  decode_stateid_maxsz)
 200 #define encode_open_downgrade_maxsz \
 201                                 (op_encode_hdr_maxsz + \
 202                                  encode_stateid_maxsz + 1 + \
 203                                  encode_share_access_maxsz)
 204 #define decode_open_downgrade_maxsz \
 205                                 (op_decode_hdr_maxsz + \
 206                                  decode_stateid_maxsz)
 207 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 208                                  1 + encode_stateid_maxsz)
 209 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 210                                  decode_stateid_maxsz)
 211 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 212                                  encode_stateid_maxsz + \
 213                                  encode_attrs_maxsz)
 214 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 215                                  nfs4_fattr_bitmap_maxsz)
 216 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 217                                  encode_stateid_maxsz + 3)
 218 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 219 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 220                                  2 + encode_verifier_maxsz + 5 + \
 221                                 nfs4_label_maxsz)
 222 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 223                                  decode_verifier_maxsz)
 224 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 225 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 226 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 227                                  encode_stateid_maxsz + 4)
 228 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 229                                  2 + decode_verifier_maxsz)
 230 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 231 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 232                                  decode_verifier_maxsz)
 233 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 234                                 nfs4_name_maxsz)
 235 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 236                                  decode_change_info_maxsz)
 237 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 238                                 2 * nfs4_name_maxsz)
 239 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 240                                  decode_change_info_maxsz + \
 241                                  decode_change_info_maxsz)
 242 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 243                                 nfs4_name_maxsz)
 244 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 245 #define encode_lockowner_maxsz  (7)
 246 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 247                                  7 + \
 248                                  1 + encode_stateid_maxsz + 1 + \
 249                                  encode_lockowner_maxsz)
 250 #define decode_lock_denied_maxsz \
 251                                 (8 + decode_lockowner_maxsz)
 252 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 253                                  decode_lock_denied_maxsz)
 254 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 255                                 encode_lockowner_maxsz)
 256 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 257                                  decode_lock_denied_maxsz)
 258 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 259                                  encode_stateid_maxsz + \
 260                                  4)
 261 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 262                                  decode_stateid_maxsz)
 263 #define encode_release_lockowner_maxsz \
 264                                 (op_encode_hdr_maxsz + \
 265                                  encode_lockowner_maxsz)
 266 #define decode_release_lockowner_maxsz \
 267                                 (op_decode_hdr_maxsz)
 268 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 269 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 270 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 271                                 1 + nfs4_name_maxsz + \
 272                                 1 + \
 273                                 nfs4_fattr_maxsz)
 274 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 275 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 276                                 1 + 2 + nfs4_name_maxsz + \
 277                                 encode_attrs_maxsz)
 278 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 279                                 decode_change_info_maxsz + \
 280                                 nfs4_fattr_bitmap_maxsz)
 281 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 282 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 283 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 284 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 285 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 286 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 287                                  nfs4_fattr_bitmap_maxsz + 1)
 288 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 289                                  encode_stateid_maxsz + 3)
 290 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 291 #define encode_fs_locations_maxsz \
 292                                 (encode_getattr_maxsz)
 293 #define decode_fs_locations_maxsz \
 294                                 (0)
 295 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 296 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 297
 298 #if defined(CONFIG_NFS_V4_1)
 299 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 300 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 301                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 302
 303 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 304                                 encode_verifier_maxsz + \
 305                                 1 /* co_ownerid.len */ + \
 306                                 /* eia_clientowner */ \
 307                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 308                                 1 /* flags */ + \
 309                                 1 /* spa_how */ + \
 310                                 /* max is SP4_MACH_CRED (for now) */ + \
 311                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 1 /* implementation id array of size 1 */ + \
 314                                 1 /* nii_domain */ + \
 315                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 316                                 1 /* nii_name */ + \
 317                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 318                                 3 /* nii_date */)
 319 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 320                                 2 /* eir_clientid */ + \
 321                                 1 /* eir_sequenceid */ + \
 322                                 1 /* eir_flags */ + \
 323                                 1 /* spr_how */ + \
 324                                   /* max is SP4_MACH_CRED (for now) */ + \
 325                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 326                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 327                                 2 /* eir_server_owner.so_minor_id */ + \
 328                                 /* eir_server_owner.so_major_id<> */ \
 329                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 330                                 /* eir_server_scope<> */ \
 331                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 332                                 1 /* eir_server_impl_id array length */ + \
 333                                 1 /* nii_domain */ + \
 334                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 335                                 1 /* nii_name */ + \
 336                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 337                                 3 /* nii_date */)
 338 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 339 #define decode_channel_attrs_maxsz  (6 + \
 340                                      1 /* ca_rdma_ird.len */ + \
 341                                      1 /* ca_rdma_ird */)
 342 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 343                                      2 /* csa_clientid */ + \
 344                                      1 /* csa_sequence */ + \
 345                                      1 /* csa_flags */ + \
 346                                      encode_channel_attrs_maxsz + \
 347                                      encode_channel_attrs_maxsz + \
 348                                      1 /* csa_cb_program */ + \
 349                                      1 /* csa_sec_parms.len (1) */ + \
 350                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 351                                      1 /* stamp */ + \
 352                                      1 /* machinename.len */ + \
 353                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 354                                      1 /* uid */ + \
 355                                      1 /* gid */ + \
 356                                      1 /* gids.len (0) */)
 357 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 358                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 359                                      1 /* csr_sequence */ + \
 360                                      1 /* csr_flags */ + \
 361                                      decode_channel_attrs_maxsz + \
 362                                      decode_channel_attrs_maxsz)
 363 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 364                                      /* bctsa_sessid */ \
 365                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 366                                      1 /* bctsa_dir */ + \
 367                                      1 /* bctsa_use_conn_in_rdma_mode */)
 368 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 369                                      /* bctsr_sessid */ \
 370                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 371                                      1 /* bctsr_dir */ + \
 372                                      1 /* bctsr_use_conn_in_rdma_mode */)
 373 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 374 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 375 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 376 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 377 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 378                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 379 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 380                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 381 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 382 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 383 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 384                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 385                                 1 /* layout type */ + \
 386                                 1 /* maxcount */ + \
 387                                 1 /* bitmap size */ + \
 388                                 1 /* notification bitmap length */ + \
 389                                 1 /* notification bitmap, word 0 */)
 390 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 391                                 1 /* layout type */ + \
 392                                 1 /* opaque devaddr4 length */ + \
 393                                   /* devaddr4 payload is read into page */ \
 394                                 1 /* notification bitmap length */ + \
 395                                 1 /* notification bitmap, word 0 */)
 396 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 397                                 encode_stateid_maxsz)
 398 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 399                                 decode_stateid_maxsz + \
 400                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 401 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 402                                 2 /* offset */ + \
 403                                 2 /* length */ + \
 404                                 1 /* reclaim */ + \
 405                                 encode_stateid_maxsz + \
 406                                 1 /* new offset (true) */ + \
 407                                 2 /* last byte written */ + \
 408                                 1 /* nt_timechanged (false) */ + \
 409                                 1 /* layoutupdate4 layout type */ + \
 410                                 1 /* layoutupdate4 opaqueue len */)
 411                                   /* the actual content of layoutupdate4 should
 412                                      be allocated by drivers and spliced in
 413                                      using xdr_write_pages */
 414 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 415 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 416                                 encode_stateid_maxsz + \
 417                                 1 + \
 418                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 419 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 420                                 1 + decode_stateid_maxsz)
 421 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 422 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 423 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 424                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 425 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 426 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 427                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 428 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 429 #else /* CONFIG_NFS_V4_1 */
 430 #define encode_sequence_maxsz   0
 431 #define decode_sequence_maxsz   0
 432 #define encode_layoutreturn_maxsz 0
 433 #define decode_layoutreturn_maxsz 0
 434 #define encode_layoutget_maxsz  0
 435 #define decode_layoutget_maxsz  0
 436 #endif /* CONFIG_NFS_V4_1 */
 437
 438 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 439 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 440 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 441                                 encode_sequence_maxsz + \
 442                                 encode_putfh_maxsz + \
 443                                 encode_read_maxsz)
 444 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 445                                 decode_sequence_maxsz + \
 446                                 decode_putfh_maxsz + \
 447                                 decode_read_maxsz)
 448 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 449                                 encode_sequence_maxsz + \
 450                                 encode_putfh_maxsz + \
 451                                 encode_readlink_maxsz)
 452 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_readlink_maxsz)
 456 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_readdir_maxsz)
 460 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 461                                 decode_sequence_maxsz + \
 462                                 decode_putfh_maxsz + \
 463                                 decode_readdir_maxsz)
 464 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_write_maxsz + \
 468                                 encode_getattr_maxsz)
 469 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 470                                 decode_sequence_maxsz + \
 471                                 decode_putfh_maxsz + \
 472                                 decode_write_maxsz + \
 473                                 decode_getattr_maxsz)
 474 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 475                                 encode_sequence_maxsz + \
 476                                 encode_putfh_maxsz + \
 477                                 encode_commit_maxsz)
 478 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 479                                 decode_sequence_maxsz + \
 480                                 decode_putfh_maxsz + \
 481                                 decode_commit_maxsz)
 482 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 483                                 encode_sequence_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_open_maxsz + \
 486                                 encode_access_maxsz + \
 487                                 encode_getfh_maxsz + \
 488                                 encode_getattr_maxsz + \
 489                                 encode_layoutget_maxsz)
 490 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 491                                 decode_sequence_maxsz + \
 492                                 decode_putfh_maxsz + \
 493                                 decode_open_maxsz + \
 494                                 decode_access_maxsz + \
 495                                 decode_getfh_maxsz + \
 496                                 decode_getattr_maxsz + \
 497                                 decode_layoutget_maxsz)
 498 #define NFS4_enc_open_confirm_sz \
 499                                 (compound_encode_hdr_maxsz + \
 500                                  encode_putfh_maxsz + \
 501                                  encode_open_confirm_maxsz)
 502 #define NFS4_dec_open_confirm_sz \
 503                                 (compound_decode_hdr_maxsz + \
 504                                  decode_putfh_maxsz + \
 505                                  decode_open_confirm_maxsz)
 506 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 507                                         encode_sequence_maxsz + \
 508                                         encode_putfh_maxsz + \
 509                                         encode_open_maxsz + \
 510                                         encode_access_maxsz + \
 511                                         encode_getattr_maxsz + \
 512                                         encode_layoutget_maxsz)
 513 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 514                                         decode_sequence_maxsz + \
 515                                         decode_putfh_maxsz + \
 516                                         decode_open_maxsz + \
 517                                         decode_access_maxsz + \
 518                                         decode_getattr_maxsz + \
 519                                         decode_layoutget_maxsz)
 520 #define NFS4_enc_open_downgrade_sz \
 521                                 (compound_encode_hdr_maxsz + \
 522                                  encode_sequence_maxsz + \
 523                                  encode_putfh_maxsz + \
 524                                  encode_layoutreturn_maxsz + \
 525                                  encode_open_downgrade_maxsz)
 526 #define NFS4_dec_open_downgrade_sz \
 527                                 (compound_decode_hdr_maxsz + \
 528                                  decode_sequence_maxsz + \
 529                                  decode_putfh_maxsz + \
 530                                  decode_layoutreturn_maxsz + \
 531                                  decode_open_downgrade_maxsz)
 532 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 533                                  encode_sequence_maxsz + \
 534                                  encode_putfh_maxsz + \
 535                                  encode_layoutreturn_maxsz + \
 536                                  encode_close_maxsz + \
 537                                  encode_getattr_maxsz)
 538 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 539                                  decode_sequence_maxsz + \
 540                                  decode_putfh_maxsz + \
 541                                  decode_layoutreturn_maxsz + \
 542                                  decode_close_maxsz + \
 543                                  decode_getattr_maxsz)
 544 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 545                                  encode_sequence_maxsz + \
 546                                  encode_putfh_maxsz + \
 547                                  encode_setattr_maxsz + \
 548                                  encode_getattr_maxsz)
 549 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 550                                  decode_sequence_maxsz + \
 551                                  decode_putfh_maxsz + \
 552                                  decode_setattr_maxsz + \
 553                                  decode_getattr_maxsz)
 554 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 555                                 encode_sequence_maxsz + \
 556                                 encode_putfh_maxsz + \
 557                                 encode_fsinfo_maxsz)
 558 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 559                                 decode_sequence_maxsz + \
 560                                 decode_putfh_maxsz + \
 561                                 decode_fsinfo_maxsz)
 562 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 563                                 encode_renew_maxsz)
 564 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 565                                 decode_renew_maxsz)
 566 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 567                                 encode_setclientid_maxsz)
 568 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 569                                 decode_setclientid_maxsz)
 570 #define NFS4_enc_setclientid_confirm_sz \
 571                                 (compound_encode_hdr_maxsz + \
 572                                 encode_setclientid_confirm_maxsz)
 573 #define NFS4_dec_setclientid_confirm_sz \
 574                                 (compound_decode_hdr_maxsz + \
 575                                 decode_setclientid_confirm_maxsz)
 576 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 577                                 encode_sequence_maxsz + \
 578                                 encode_putfh_maxsz + \
 579                                 encode_lock_maxsz)
 580 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 581                                 decode_sequence_maxsz + \
 582                                 decode_putfh_maxsz + \
 583                                 decode_lock_maxsz)
 584 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 585                                 encode_sequence_maxsz + \
 586                                 encode_putfh_maxsz + \
 587                                 encode_lockt_maxsz)
 588 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 589                                  decode_sequence_maxsz + \
 590                                  decode_putfh_maxsz + \
 591                                  decode_lockt_maxsz)
 592 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 593                                 encode_sequence_maxsz + \
 594                                 encode_putfh_maxsz + \
 595                                 encode_locku_maxsz)
 596 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 597                                 decode_sequence_maxsz + \
 598                                 decode_putfh_maxsz + \
 599                                 decode_locku_maxsz)
 600 #define NFS4_enc_release_lockowner_sz \
 601                                 (compound_encode_hdr_maxsz + \
 602                                  encode_lockowner_maxsz)
 603 #define NFS4_dec_release_lockowner_sz \
 604                                 (compound_decode_hdr_maxsz + \
 605                                  decode_lockowner_maxsz)
 606 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 607                                 encode_sequence_maxsz + \
 608                                 encode_putfh_maxsz + \
 609                                 encode_access_maxsz + \
 610                                 encode_getattr_maxsz)
 611 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 612                                 decode_sequence_maxsz + \
 613                                 decode_putfh_maxsz + \
 614                                 decode_access_maxsz + \
 615                                 decode_getattr_maxsz)
 616 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 617                                 encode_sequence_maxsz + \
 618                                 encode_putfh_maxsz + \
 619                                 encode_getattr_maxsz + \
 620                                 encode_renew_maxsz)
 621 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 622                                 decode_sequence_maxsz + \
 623                                 decode_putfh_maxsz + \
 624                                 decode_getattr_maxsz + \
 625                                 decode_renew_maxsz)
 626 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 627                                 encode_sequence_maxsz + \
 628                                 encode_putfh_maxsz + \
 629                                 encode_lookup_maxsz + \
 630                                 encode_getattr_maxsz + \
 631                                 encode_getfh_maxsz)
 632 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 633                                 decode_sequence_maxsz + \
 634                                 decode_putfh_maxsz + \
 635                                 decode_lookup_maxsz + \
 636                                 decode_getattr_maxsz + \
 637                                 decode_getfh_maxsz)
 638 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 639                                 encode_sequence_maxsz + \
 640                                 encode_putfh_maxsz + \
 641                                 encode_lookupp_maxsz + \
 642                                 encode_getattr_maxsz + \
 643                                 encode_getfh_maxsz)
 644 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 645                                 decode_sequence_maxsz + \
 646                                 decode_putfh_maxsz + \
 647                                 decode_lookupp_maxsz + \
 648                                 decode_getattr_maxsz + \
 649                                 decode_getfh_maxsz)
 650 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 651                                 encode_sequence_maxsz + \
 652                                 encode_putrootfh_maxsz + \
 653                                 encode_getattr_maxsz + \
 654                                 encode_getfh_maxsz)
 655 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 656                                 decode_sequence_maxsz + \
 657                                 decode_putrootfh_maxsz + \
 658                                 decode_getattr_maxsz + \
 659                                 decode_getfh_maxsz)
 660 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 661                                 encode_sequence_maxsz + \
 662                                 encode_putfh_maxsz + \
 663                                 encode_remove_maxsz)
 664 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 665                                 decode_sequence_maxsz + \
 666                                 decode_putfh_maxsz + \
 667                                 decode_remove_maxsz)
 668 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 669                                 encode_sequence_maxsz + \
 670                                 encode_putfh_maxsz + \
 671                                 encode_savefh_maxsz + \
 672                                 encode_putfh_maxsz + \
 673                                 encode_rename_maxsz)
 674 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 675                                 decode_sequence_maxsz + \
 676                                 decode_putfh_maxsz + \
 677                                 decode_savefh_maxsz + \
 678                                 decode_putfh_maxsz + \
 679                                 decode_rename_maxsz)
 680 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 681                                 encode_sequence_maxsz + \
 682                                 encode_putfh_maxsz + \
 683                                 encode_savefh_maxsz + \
 684                                 encode_putfh_maxsz + \
 685                                 encode_link_maxsz + \
 686                                 encode_restorefh_maxsz + \
 687                                 encode_getattr_maxsz)
 688 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 689                                 decode_sequence_maxsz + \
 690                                 decode_putfh_maxsz + \
 691                                 decode_savefh_maxsz + \
 692                                 decode_putfh_maxsz + \
 693                                 decode_link_maxsz + \
 694                                 decode_restorefh_maxsz + \
 695                                 decode_getattr_maxsz)
 696 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 697                                 encode_sequence_maxsz + \
 698                                 encode_putfh_maxsz + \
 699                                 encode_symlink_maxsz + \
 700                                 encode_getattr_maxsz + \
 701                                 encode_getfh_maxsz)
 702 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 703                                 decode_sequence_maxsz + \
 704                                 decode_putfh_maxsz + \
 705                                 decode_symlink_maxsz + \
 706                                 decode_getattr_maxsz + \
 707                                 decode_getfh_maxsz)
 708 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 709                                 encode_sequence_maxsz + \
 710                                 encode_putfh_maxsz + \
 711                                 encode_create_maxsz + \
 712                                 encode_getfh_maxsz + \
 713                                 encode_getattr_maxsz)
 714 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 715                                 decode_sequence_maxsz + \
 716                                 decode_putfh_maxsz + \
 717                                 decode_create_maxsz + \
 718                                 decode_getfh_maxsz + \
 719                                 decode_getattr_maxsz)
 720 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 721                                 encode_sequence_maxsz + \
 722                                 encode_putfh_maxsz + \
 723                                 encode_getattr_maxsz)
 724 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 725                                 decode_sequence_maxsz + \
 726                                 decode_putfh_maxsz + \
 727                                 decode_getattr_maxsz)
 728 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 729                                 encode_sequence_maxsz + \
 730                                 encode_putfh_maxsz + \
 731                                 encode_statfs_maxsz)
 732 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 733                                 decode_sequence_maxsz + \
 734                                 decode_putfh_maxsz + \
 735                                 decode_statfs_maxsz)
 736 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 737                                 encode_sequence_maxsz + \
 738                                 encode_putfh_maxsz + \
 739                                 encode_getattr_maxsz)
 740 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 741                                 decode_sequence_maxsz + \
 742                                 decode_putfh_maxsz + \
 743                                 decode_getattr_maxsz)
 744 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 745                                 encode_sequence_maxsz + \
 746                                 encode_putfh_maxsz + \
 747                                 encode_layoutreturn_maxsz + \
 748                                 encode_delegreturn_maxsz + \
 749                                 encode_getattr_maxsz)
 750 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 751                                 decode_sequence_maxsz + \
 752                                 decode_putfh_maxsz + \
 753                                 decode_layoutreturn_maxsz + \
 754                                 decode_delegreturn_maxsz + \
 755                                 decode_getattr_maxsz)
 756 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 757                                 encode_sequence_maxsz + \
 758                                 encode_putfh_maxsz + \
 759                                 encode_getacl_maxsz)
 760 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 761                                 decode_sequence_maxsz + \
 762                                 decode_putfh_maxsz + \
 763                                 decode_getacl_maxsz)
 764 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 765                                 encode_sequence_maxsz + \
 766                                 encode_putfh_maxsz + \
 767                                 encode_setacl_maxsz)
 768 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 769                                 decode_sequence_maxsz + \
 770                                 decode_putfh_maxsz + \
 771                                 decode_setacl_maxsz)
 772 #define NFS4_enc_fs_locations_sz \
 773                                 (compound_encode_hdr_maxsz + \
 774                                  encode_sequence_maxsz + \
 775                                  encode_putfh_maxsz + \
 776                                  encode_lookup_maxsz + \
 777                                  encode_fs_locations_maxsz + \
 778                                  encode_renew_maxsz)
 779 #define NFS4_dec_fs_locations_sz \
 780                                 (compound_decode_hdr_maxsz + \
 781                                  decode_sequence_maxsz + \
 782                                  decode_putfh_maxsz + \
 783                                  decode_lookup_maxsz + \
 784                                  decode_fs_locations_maxsz + \
 785                                  decode_renew_maxsz)
 786 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 787                                 encode_sequence_maxsz + \
 788                                 encode_putfh_maxsz + \
 789                                 encode_secinfo_maxsz)
 790 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 791                                 decode_sequence_maxsz + \
 792                                 decode_putfh_maxsz + \
 793                                 decode_secinfo_maxsz)
 794 #define NFS4_enc_fsid_present_sz \
 795                                 (compound_encode_hdr_maxsz + \
 796                                  encode_sequence_maxsz + \
 797                                  encode_putfh_maxsz + \
 798                                  encode_getfh_maxsz + \
 799                                  encode_renew_maxsz)
 800 #define NFS4_dec_fsid_present_sz \
 801                                 (compound_decode_hdr_maxsz + \
 802                                  decode_sequence_maxsz + \
 803                                  decode_putfh_maxsz + \
 804                                  decode_getfh_maxsz + \
 805                                  decode_renew_maxsz)
 806 #if defined(CONFIG_NFS_V4_1)
 807 #define NFS4_enc_bind_conn_to_session_sz \
 808                                 (compound_encode_hdr_maxsz + \
 809                                  encode_bind_conn_to_session_maxsz)
 810 #define NFS4_dec_bind_conn_to_session_sz \
 811                                 (compound_decode_hdr_maxsz + \
 812                                  decode_bind_conn_to_session_maxsz)
 813 #define NFS4_enc_exchange_id_sz \
 814                                 (compound_encode_hdr_maxsz + \
 815                                  encode_exchange_id_maxsz)
 816 #define NFS4_dec_exchange_id_sz \
 817                                 (compound_decode_hdr_maxsz + \
 818                                  decode_exchange_id_maxsz)
 819 #define NFS4_enc_create_session_sz \
 820                                 (compound_encode_hdr_maxsz + \
 821                                  encode_create_session_maxsz)
 822 #define NFS4_dec_create_session_sz \
 823                                 (compound_decode_hdr_maxsz + \
 824                                  decode_create_session_maxsz)
 825 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 826                                          encode_destroy_session_maxsz)
 827 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 828                                          decode_destroy_session_maxsz)
 829 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 830                                          encode_destroy_clientid_maxsz)
 831 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 832                                          decode_destroy_clientid_maxsz)
 833 #define NFS4_enc_sequence_sz \
 834                                 (compound_decode_hdr_maxsz + \
 835                                  encode_sequence_maxsz)
 836 #define NFS4_dec_sequence_sz \
 837                                 (compound_decode_hdr_maxsz + \
 838                                  decode_sequence_maxsz)
 839 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 840                                          encode_sequence_maxsz + \
 841                                          encode_putrootfh_maxsz + \
 842                                          encode_fsinfo_maxsz)
 843 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 844                                          decode_sequence_maxsz + \
 845                                          decode_putrootfh_maxsz + \
 846                                          decode_fsinfo_maxsz)
 847 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 848                                          encode_sequence_maxsz + \
 849                                          encode_reclaim_complete_maxsz)
 850 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 851                                          decode_sequence_maxsz + \
 852                                          decode_reclaim_complete_maxsz)
 853 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 854                                 encode_sequence_maxsz +\
 855                                 encode_getdeviceinfo_maxsz)
 856 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 857                                 decode_sequence_maxsz + \
 858                                 decode_getdeviceinfo_maxsz)
 859 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 860                                 encode_sequence_maxsz + \
 861                                 encode_putfh_maxsz +        \
 862                                 encode_layoutget_maxsz)
 863 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 864                                 decode_sequence_maxsz + \
 865                                 decode_putfh_maxsz +        \
 866                                 decode_layoutget_maxsz)
 867 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 868                                 encode_sequence_maxsz +\
 869                                 encode_putfh_maxsz + \
 870                                 encode_layoutcommit_maxsz + \
 871                                 encode_getattr_maxsz)
 872 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 873                                 decode_sequence_maxsz + \
 874                                 decode_putfh_maxsz + \
 875                                 decode_layoutcommit_maxsz + \
 876                                 decode_getattr_maxsz)
 877 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 878                                 encode_sequence_maxsz + \
 879                                 encode_putfh_maxsz + \
 880                                 encode_layoutreturn_maxsz)
 881 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 882                                 decode_sequence_maxsz + \
 883                                 decode_putfh_maxsz + \
 884                                 decode_layoutreturn_maxsz)
 885 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 886                                         encode_sequence_maxsz + \
 887                                         encode_putrootfh_maxsz +\
 888                                         encode_secinfo_no_name_maxsz)
 889 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 890                                         decode_sequence_maxsz + \
 891                                         decode_putrootfh_maxsz + \
 892                                         decode_secinfo_no_name_maxsz)
 893 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 894                                          encode_sequence_maxsz + \
 895                                          encode_test_stateid_maxsz)
 896 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 897                                          decode_sequence_maxsz + \
 898                                          decode_test_stateid_maxsz)
 899 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 900                                          encode_sequence_maxsz + \
 901                                          encode_free_stateid_maxsz)
 902 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 903                                          decode_sequence_maxsz + \
 904                                          decode_free_stateid_maxsz)
 905
 906 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 907                                       compound_encode_hdr_maxsz +
 908                                       encode_sequence_maxsz +
 909                                       encode_putfh_maxsz +
 910                                       encode_getattr_maxsz) *
 911                                      XDR_UNIT);
 912
 913 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 914                                      compound_decode_hdr_maxsz +
 915                                      decode_sequence_maxsz +
 916                                      decode_putfh_maxsz) *
 917                                     XDR_UNIT);
 918
 919 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 920                                            compound_decode_hdr_maxsz +
 921                                            decode_sequence_maxsz) *
 922                                           XDR_UNIT);
 923 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 924 #endif /* CONFIG_NFS_V4_1 */
 925
 926 static const umode_t nfs_type2fmt[] = {
 927         [NF4BAD] = 0,
 928         [NF4REG] = S_IFREG,
 929         [NF4DIR] = S_IFDIR,
 930         [NF4BLK] = S_IFBLK,
 931         [NF4CHR] = S_IFCHR,
 932         [NF4LNK] = S_IFLNK,
 933         [NF4SOCK] = S_IFSOCK,
 934         [NF4FIFO] = S_IFIFO,
 935         [NF4ATTRDIR] = 0,
 936         [NF4NAMEDATTR] = 0,
 937 };
 938
 939 struct compound_hdr {
 940         int32_t         status;
 941         uint32_t        nops;
 942         __be32 *        nops_p;
 943         uint32_t        taglen;
 944         char *          tag;
 945         uint32_t        replen;         /* expected reply words */
 946         u32             minorversion;
 947 };
 948
 949 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 950 {
 951         __be32 *p = xdr_reserve_space(xdr, nbytes);
 952         BUG_ON(!p);
 953         return p;
 954 }
 955
 956 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 957 {
 958         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 959 }
 960
 961 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 962 {
 963         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 964 }
 965
 966 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 967 {
 968         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 969 }
 970
 971 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 972 {
 973         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 974 }
 975
 976 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 977                 const __u32 *bitmap, size_t len)
 978 {
 979         ssize_t ret;
 980
 981         /* Trim empty words */
 982         while (len > 0 && bitmap[len-1] == 0)
 983                 len--;
 984         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 985         if (WARN_ON_ONCE(ret < 0))
 986                 return ret;
 987         return len;
 988 }
 989
 990 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 991                 __u32 *res, size_t len)
 992 {
 993         size_t i;
 994         __u32 tmp;
 995
 996         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
 997                 len--;
 998         for (i = len; i-- > 0;) {
 999                 tmp = bitmap[i] & mask[i];
1000                 res[i] = tmp;
1001         }
1002         return len;
1003 }
1004
1005 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1006                 const struct nfs_seqid *seqid)
1007 {
1008         if (seqid != NULL)
1009                 encode_uint32(xdr, seqid->sequence->counter);
1010         else
1011                 encode_uint32(xdr, 0);
1012 }
1013
1014 static void encode_compound_hdr(struct xdr_stream *xdr,
1015                                 struct rpc_rqst *req,
1016                                 struct compound_hdr *hdr)
1017 {
1018         __be32 *p;
1019
1020         /* initialize running count of expected bytes in reply.
1021          * NOTE: the replied tag SHOULD be the same is the one sent,
1022          * but this is not required as a MUST for the server to do so. */
1023         hdr->replen = 3 + hdr->taglen;
1024
1025         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1026         encode_string(xdr, hdr->taglen, hdr->tag);
1027         p = reserve_space(xdr, 8);
1028         *p++ = cpu_to_be32(hdr->minorversion);
1029         hdr->nops_p = p;
1030         *p = cpu_to_be32(hdr->nops);
1031 }
1032
1033 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1034                 uint32_t replen,
1035                 struct compound_hdr *hdr)
1036 {
1037         encode_uint32(xdr, op);
1038         hdr->nops++;
1039         hdr->replen += replen;
1040 }
1041
1042 static void encode_nops(struct compound_hdr *hdr)
1043 {
1044         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1045         *hdr->nops_p = htonl(hdr->nops);
1046 }
1047
1048 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1049 {
1050         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1051 }
1052
1053 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1054 {
1055         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1056 }
1057
1058 static __be32 *
1059 xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1060 {
1061         p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1062         *p++ = cpu_to_be32(t->tv_nsec);
1063         return p;
1064 }
1065
1066 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1067                                 const struct nfs4_label *label,
1068                                 const umode_t *umask,
1069                                 const struct nfs_server *server,
1070                                 const uint32_t attrmask[])
1071 {
1072         struct timespec ts;
1073         char owner_name[IDMAP_NAMESZ];
1074         char owner_group[IDMAP_NAMESZ];
1075         int owner_namelen = 0;
1076         int owner_grouplen = 0;
1077         __be32 *p;
1078         uint32_t len = 0;
1079         uint32_t bmval[3] = { 0 };
1080
1081         /*
1082          * We reserve enough space to write the entire attribute buffer at once.
1083          */
1084         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1085                 bmval[0] |= FATTR4_WORD0_SIZE;
1086                 len += 8;
1087         }
1088         if (iap->ia_valid & ATTR_MODE) {
1089                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1090                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1091                         len += 8;
1092                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1093                         bmval[1] |= FATTR4_WORD1_MODE;
1094                         len += 4;
1095                 }
1096         }
1097         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1098                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1099                 if (owner_namelen < 0) {
1100                         dprintk("nfs: couldn't resolve uid %d to string\n",
1101                                         from_kuid(&init_user_ns, iap->ia_uid));
1102                         /* XXX */
1103                         strcpy(owner_name, "nobody");
1104                         owner_namelen = sizeof("nobody") - 1;
1105                         /* goto out; */
1106                 }
1107                 bmval[1] |= FATTR4_WORD1_OWNER;
1108                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1109         }
1110         if ((iap->ia_valid & ATTR_GID) &&
1111            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1112                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1113                 if (owner_grouplen < 0) {
1114                         dprintk("nfs: couldn't resolve gid %d to string\n",
1115                                         from_kgid(&init_user_ns, iap->ia_gid));
1116                         strcpy(owner_group, "nobody");
1117                         owner_grouplen = sizeof("nobody") - 1;
1118                         /* goto out; */
1119                 }
1120                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1121                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1122         }
1123         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1124                 if (iap->ia_valid & ATTR_ATIME_SET) {
1125                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1126                         len += 4 + (nfstime4_maxsz << 2);
1127                 } else if (iap->ia_valid & ATTR_ATIME) {
1128                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1129                         len += 4;
1130                 }
1131         }
1132         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1133                 if (iap->ia_valid & ATTR_MTIME_SET) {
1134                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1135                         len += 4 + (nfstime4_maxsz << 2);
1136                 } else if (iap->ia_valid & ATTR_MTIME) {
1137                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1138                         len += 4;
1139                 }
1140         }
1141
1142         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1143                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1144                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1145         }
1146
1147         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1148         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1149
1150         if (bmval[0] & FATTR4_WORD0_SIZE)
1151                 p = xdr_encode_hyper(p, iap->ia_size);
1152         if (bmval[1] & FATTR4_WORD1_MODE)
1153                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1154         if (bmval[1] & FATTR4_WORD1_OWNER)
1155                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1156         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1157                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1158         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1159                 if (iap->ia_valid & ATTR_ATIME_SET) {
1160                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1161                         ts = timespec64_to_timespec(iap->ia_atime);
1162                         p = xdr_encode_nfstime4(p, &ts);
1163                 } else
1164                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1165         }
1166         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1167                 if (iap->ia_valid & ATTR_MTIME_SET) {
1168                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1169                         ts = timespec64_to_timespec(iap->ia_mtime);
1170                         p = xdr_encode_nfstime4(p, &ts);
1171                 } else
1172                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1173         }
1174         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1175                 *p++ = cpu_to_be32(label->lfs);
1176                 *p++ = cpu_to_be32(label->pi);
1177                 *p++ = cpu_to_be32(label->len);
1178                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1179         }
1180         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1181                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1182                 *p++ = cpu_to_be32(*umask);
1183         }
1184
1185 /* out: */
1186 }
1187
1188 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1189 {
1190         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1191         encode_uint32(xdr, access);
1192 }
1193
1194 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1195 {
1196         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1197         encode_nfs4_seqid(xdr, arg->seqid);
1198         encode_nfs4_stateid(xdr, &arg->stateid);
1199 }
1200
1201 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1202 {
1203         __be32 *p;
1204
1205         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1206         p = reserve_space(xdr, 12);
1207         p = xdr_encode_hyper(p, args->offset);
1208         *p = cpu_to_be32(args->count);
1209 }
1210
1211 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1212 {
1213         __be32 *p;
1214
1215         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1216         encode_uint32(xdr, create->ftype);
1217
1218         switch (create->ftype) {
1219         case NF4LNK:
1220                 p = reserve_space(xdr, 4);
1221                 *p = cpu_to_be32(create->u.symlink.len);
1222                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1223                                 create->u.symlink.len);
1224                 xdr->buf->flags |= XDRBUF_WRITE;
1225                 break;
1226
1227         case NF4BLK: case NF4CHR:
1228                 p = reserve_space(xdr, 8);
1229                 *p++ = cpu_to_be32(create->u.device.specdata1);
1230                 *p = cpu_to_be32(create->u.device.specdata2);
1231                 break;
1232
1233         default:
1234                 break;
1235         }
1236
1237         encode_string(xdr, create->name->len, create->name->name);
1238         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1239                         create->server, create->server->attr_bitmask);
1240 }
1241
1242 static void encode_getattr(struct xdr_stream *xdr,
1243                 const __u32 *bitmap, const __u32 *mask, size_t len,
1244                 struct compound_hdr *hdr)
1245 {
1246         __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1247
1248         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1249         if (mask) {
1250                 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1251                         len = ARRAY_SIZE(masked_bitmap);
1252                 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1253                 bitmap = masked_bitmap;
1254         }
1255         xdr_encode_bitmap4(xdr, bitmap, len);
1256 }
1257
1258 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1259 {
1260         encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1261                         ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1262 }
1263
1264 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1265                                  const u32 *open_bitmap,
1266                                  struct compound_hdr *hdr)
1267 {
1268         encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1269 }
1270
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273         encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1274                         ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1275 }
1276
1277 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1278 {
1279         encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1280                         ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1281 }
1282
1283 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1284 {
1285         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1286 }
1287
1288 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1289 {
1290         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1291         encode_string(xdr, name->len, name->name);
1292 }
1293
1294 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1295 {
1296         if (fl->fl_type == F_RDLCK)
1297                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1298         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1299 }
1300
1301 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1302 {
1303         if (fl->fl_end == OFFSET_MAX)
1304                 return ~(uint64_t)0;
1305         return fl->fl_end - fl->fl_start + 1;
1306 }
1307
1308 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1309 {
1310         __be32 *p;
1311
1312         p = reserve_space(xdr, 32);
1313         p = xdr_encode_hyper(p, lowner->clientid);
1314         *p++ = cpu_to_be32(20);
1315         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1316         *p++ = cpu_to_be32(lowner->s_dev);
1317         xdr_encode_hyper(p, lowner->id);
1318 }
1319
1320 /*
1321  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1322  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1323  */
1324 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1325 {
1326         __be32 *p;
1327
1328         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1329         p = reserve_space(xdr, 28);
1330         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1331         *p++ = cpu_to_be32(args->reclaim);
1332         p = xdr_encode_hyper(p, args->fl->fl_start);
1333         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1334         *p = cpu_to_be32(args->new_lock_owner);
1335         if (args->new_lock_owner){
1336                 encode_nfs4_seqid(xdr, args->open_seqid);
1337                 encode_nfs4_stateid(xdr, &args->open_stateid);
1338                 encode_nfs4_seqid(xdr, args->lock_seqid);
1339                 encode_lockowner(xdr, &args->lock_owner);
1340         }
1341         else {
1342                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1343                 encode_nfs4_seqid(xdr, args->lock_seqid);
1344         }
1345 }
1346
1347 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1348 {
1349         __be32 *p;
1350
1351         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1352         p = reserve_space(xdr, 20);
1353         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1354         p = xdr_encode_hyper(p, args->fl->fl_start);
1355         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1356         encode_lockowner(xdr, &args->lock_owner);
1357 }
1358
1359 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1360 {
1361         __be32 *p;
1362
1363         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1364         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1365         encode_nfs4_seqid(xdr, args->seqid);
1366         encode_nfs4_stateid(xdr, &args->stateid);
1367         p = reserve_space(xdr, 16);
1368         p = xdr_encode_hyper(p, args->fl->fl_start);
1369         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1370 }
1371
1372 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1373 {
1374         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1375         encode_lockowner(xdr, lowner);
1376 }
1377
1378 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1379 {
1380         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1381         encode_string(xdr, name->len, name->name);
1382 }
1383
1384 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1385 {
1386         encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1387 }
1388
1389 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1390 {
1391         __be32 *p;
1392
1393         p = reserve_space(xdr, 8);
1394         *p++ = cpu_to_be32(share_access);
1395         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1396 }
1397
1398 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400         __be32 *p;
1401  /*
1402  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1403  * owner 4 = 32
1404  */
1405         encode_nfs4_seqid(xdr, arg->seqid);
1406         encode_share_access(xdr, arg->share_access);
1407         p = reserve_space(xdr, 36);
1408         p = xdr_encode_hyper(p, arg->clientid);
1409         *p++ = cpu_to_be32(24);
1410         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1411         *p++ = cpu_to_be32(arg->server->s_dev);
1412         *p++ = cpu_to_be32(arg->id.uniquifier);
1413         xdr_encode_hyper(p, arg->id.create_time);
1414 }
1415
1416 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1417 {
1418         __be32 *p;
1419
1420         p = reserve_space(xdr, 4);
1421         switch(arg->createmode) {
1422         case NFS4_CREATE_UNCHECKED:
1423                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1424                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1425                                 arg->server, arg->server->attr_bitmask);
1426                 break;
1427         case NFS4_CREATE_GUARDED:
1428                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1429                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1430                                 arg->server, arg->server->attr_bitmask);
1431                 break;
1432         case NFS4_CREATE_EXCLUSIVE:
1433                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1434                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1435                 break;
1436         case NFS4_CREATE_EXCLUSIVE4_1:
1437                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1438                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1439                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1440                                 arg->server, arg->server->exclcreat_bitmask);
1441         }
1442 }
1443
1444 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1445 {
1446         __be32 *p;
1447
1448         p = reserve_space(xdr, 4);
1449         switch (arg->open_flags & O_CREAT) {
1450         case 0:
1451                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1452                 break;
1453         default:
1454                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1455                 encode_createmode(xdr, arg);
1456         }
1457 }
1458
1459 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1460 {
1461         __be32 *p;
1462
1463         p = reserve_space(xdr, 4);
1464         switch (delegation_type) {
1465         case 0:
1466                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1467                 break;
1468         case FMODE_READ:
1469                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1470                 break;
1471         case FMODE_WRITE|FMODE_READ:
1472                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1473                 break;
1474         default:
1475                 BUG();
1476         }
1477 }
1478
1479 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4);
1484         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1485         encode_string(xdr, name->len, name->name);
1486 }
1487
1488 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1489 {
1490         __be32 *p;
1491
1492         p = reserve_space(xdr, 4);
1493         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1494         encode_delegation_type(xdr, type);
1495 }
1496
1497 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1498 {
1499         __be32 *p;
1500
1501         p = reserve_space(xdr, 4);
1502         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1503         encode_nfs4_stateid(xdr, stateid);
1504         encode_string(xdr, name->len, name->name);
1505 }
1506
1507 static inline void encode_claim_fh(struct xdr_stream *xdr)
1508 {
1509         __be32 *p;
1510
1511         p = reserve_space(xdr, 4);
1512         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1513 }
1514
1515 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1516 {
1517         __be32 *p;
1518
1519         p = reserve_space(xdr, 4);
1520         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1521         encode_nfs4_stateid(xdr, stateid);
1522 }
1523
1524 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1525 {
1526         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1527         encode_openhdr(xdr, arg);
1528         encode_opentype(xdr, arg);
1529         switch (arg->claim) {
1530         case NFS4_OPEN_CLAIM_NULL:
1531                 encode_claim_null(xdr, arg->name);
1532                 break;
1533         case NFS4_OPEN_CLAIM_PREVIOUS:
1534                 encode_claim_previous(xdr, arg->u.delegation_type);
1535                 break;
1536         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1537                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1538                 break;
1539         case NFS4_OPEN_CLAIM_FH:
1540                 encode_claim_fh(xdr);
1541                 break;
1542         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1543                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1544                 break;
1545         default:
1546                 BUG();
1547         }
1548 }
1549
1550 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1551 {
1552         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1553         encode_nfs4_stateid(xdr, arg->stateid);
1554         encode_nfs4_seqid(xdr, arg->seqid);
1555 }
1556
1557 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1558 {
1559         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1560         encode_nfs4_stateid(xdr, &arg->stateid);
1561         encode_nfs4_seqid(xdr, arg->seqid);
1562         encode_share_access(xdr, arg->share_access);
1563 }
1564
1565 static void
1566 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1567 {
1568         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1569         encode_string(xdr, fh->size, fh->data);
1570 }
1571
1572 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1573 {
1574         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1575 }
1576
1577 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1578                         struct compound_hdr *hdr)
1579 {
1580         __be32 *p;
1581
1582         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1583         encode_nfs4_stateid(xdr, &args->stateid);
1584
1585         p = reserve_space(xdr, 12);
1586         p = xdr_encode_hyper(p, args->offset);
1587         *p = cpu_to_be32(args->count);
1588 }
1589
1590 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592         uint32_t attrs[3] = {
1593                 FATTR4_WORD0_RDATTR_ERROR,
1594                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1595         };
1596         uint32_t dircount = readdir->count >> 1;
1597         __be32 *p, verf[2];
1598         uint32_t attrlen = 0;
1599         unsigned int i;
1600
1601         if (readdir->plus) {
1602                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1603                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1604                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1605                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1606                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1607                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1608                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1609                 dircount >>= 1;
1610         }
1611         /* Use mounted_on_fileid only if the server supports it */
1612         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1613                 attrs[0] |= FATTR4_WORD0_FILEID;
1614         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1615                 attrs[i] &= readdir->bitmask[i];
1616                 if (attrs[i] != 0)
1617                         attrlen = i+1;
1618         }
1619
1620         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1621         encode_uint64(xdr, readdir->cookie);
1622         encode_nfs4_verifier(xdr, &readdir->verifier);
1623         p = reserve_space(xdr, 12 + (attrlen << 2));
1624         *p++ = cpu_to_be32(dircount);
1625         *p++ = cpu_to_be32(readdir->count);
1626         *p++ = cpu_to_be32(attrlen);
1627         for (i = 0; i < attrlen; i++)
1628                 *p++ = cpu_to_be32(attrs[i]);
1629         memcpy(verf, readdir->verifier.data, sizeof(verf));
1630
1631         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1632                         __func__,
1633                         (unsigned long long)readdir->cookie,
1634                         verf[0], verf[1],
1635                         attrs[0] & readdir->bitmask[0],
1636                         attrs[1] & readdir->bitmask[1],
1637                         attrs[2] & readdir->bitmask[2]);
1638 }
1639
1640 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1641 {
1642         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1643 }
1644
1645 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1646 {
1647         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1648         encode_string(xdr, name->len, name->name);
1649 }
1650
1651 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1652 {
1653         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1654         encode_string(xdr, oldname->len, oldname->name);
1655         encode_string(xdr, newname->len, newname->name);
1656 }
1657
1658 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1659                          struct compound_hdr *hdr)
1660 {
1661         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1662         encode_uint64(xdr, clid);
1663 }
1664
1665 static void
1666 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667 {
1668         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1669 }
1670
1671 static void
1672 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1673                 struct compound_hdr *hdr)
1674 {
1675         __be32 *p;
1676
1677         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1678         encode_nfs4_stateid(xdr, &zero_stateid);
1679         p = reserve_space(xdr, 2*4);
1680         *p++ = cpu_to_be32(1);
1681         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1682         p = reserve_space(xdr, 4);
1683         *p = cpu_to_be32(arg->acl_len);
1684         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1685 }
1686
1687 static void
1688 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1689 {
1690         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1691 }
1692
1693 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1694 {
1695         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1696         encode_nfs4_stateid(xdr, &arg->stateid);
1697         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1698                         server->attr_bitmask);
1699 }
1700
1701 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1702 {
1703         __be32 *p;
1704
1705         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1706         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1707
1708         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1709                         setclientid->sc_clnt->cl_owner_id);
1710         p = reserve_space(xdr, 4);
1711         *p = cpu_to_be32(setclientid->sc_prog);
1712         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1713         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1714         p = reserve_space(xdr, 4);
1715         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1716 }
1717
1718 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1719 {
1720         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1721                         decode_setclientid_confirm_maxsz, hdr);
1722         encode_uint64(xdr, arg->clientid);
1723         encode_nfs4_verifier(xdr, &arg->confirm);
1724 }
1725
1726 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1727                          struct compound_hdr *hdr)
1728 {
1729         __be32 *p;
1730
1731         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1732         encode_nfs4_stateid(xdr, &args->stateid);
1733
1734         p = reserve_space(xdr, 16);
1735         p = xdr_encode_hyper(p, args->offset);
1736         *p++ = cpu_to_be32(args->stable);
1737         *p = cpu_to_be32(args->count);
1738
1739         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1740 }
1741
1742 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1743 {
1744         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1745         encode_nfs4_stateid(xdr, stateid);
1746 }
1747
1748 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1749 {
1750         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1751         encode_string(xdr, name->len, name->name);
1752 }
1753
1754 #if defined(CONFIG_NFS_V4_1)
1755 /* NFSv4.1 operations */
1756 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1757                                    const struct nfs41_bind_conn_to_session_args *args,
1758                                    struct compound_hdr *hdr)
1759 {
1760         __be32 *p;
1761
1762         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1763                 decode_bind_conn_to_session_maxsz, hdr);
1764         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1765         p = xdr_reserve_space(xdr, 8);
1766         *p++ = cpu_to_be32(args->dir);
1767         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1768 }
1769
1770 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1771 {
1772         unsigned int i;
1773         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1774         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1775                 encode_uint32(xdr, op_map->u.words[i]);
1776 }
1777
1778 static void encode_exchange_id(struct xdr_stream *xdr,
1779                                const struct nfs41_exchange_id_args *args,
1780                                struct compound_hdr *hdr)
1781 {
1782         __be32 *p;
1783         char impl_name[IMPL_NAME_LIMIT];
1784         int len = 0;
1785
1786         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1787         encode_nfs4_verifier(xdr, &args->verifier);
1788
1789         encode_string(xdr, strlen(args->client->cl_owner_id),
1790                         args->client->cl_owner_id);
1791
1792         encode_uint32(xdr, args->flags);
1793         encode_uint32(xdr, args->state_protect.how);
1794
1795         switch (args->state_protect.how) {
1796         case SP4_NONE:
1797                 break;
1798         case SP4_MACH_CRED:
1799                 encode_op_map(xdr, &args->state_protect.enforce);
1800                 encode_op_map(xdr, &args->state_protect.allow);
1801                 break;
1802         default:
1803                 WARN_ON_ONCE(1);
1804                 break;
1805         }
1806
1807         if (send_implementation_id &&
1808             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1809             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1810                 <= sizeof(impl_name) + 1)
1811                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1812                                utsname()->sysname, utsname()->release,
1813                                utsname()->version, utsname()->machine);
1814
1815         if (len > 0) {
1816                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1817
1818                 encode_string(xdr,
1819                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1820                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1821                 encode_string(xdr, len, impl_name);
1822                 /* just send zeros for nii_date - the date is in nii_name */
1823                 p = reserve_space(xdr, 12);
1824                 p = xdr_encode_hyper(p, 0);
1825                 *p = cpu_to_be32(0);
1826         } else
1827                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1828 }
1829
1830 static void encode_create_session(struct xdr_stream *xdr,
1831                                   const struct nfs41_create_session_args *args,
1832                                   struct compound_hdr *hdr)
1833 {
1834         __be32 *p;
1835         struct nfs_client *clp = args->client;
1836         struct rpc_clnt *clnt = clp->cl_rpcclient;
1837         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1838         u32 max_resp_sz_cached;
1839
1840         /*
1841          * Assumes OPEN is the biggest non-idempotent compound.
1842          * 2 is the verifier.
1843          */
1844         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1845                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1846
1847         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1848         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1849         p = xdr_encode_hyper(p, args->clientid);
1850         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1851         *p++ = cpu_to_be32(args->flags);                        /*flags */
1852
1853         /* Fore Channel */
1854         *p++ = cpu_to_be32(0);                          /* header padding size */
1855         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1856         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1857         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1858         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1859         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1860         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1861
1862         /* Back Channel */
1863         *p++ = cpu_to_be32(0);                          /* header padding size */
1864         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1865         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1866         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1867         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1868         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1869         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1870
1871         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1872         *p++ = cpu_to_be32(1);
1873         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1874
1875         /* authsys_parms rfc1831 */
1876         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1877         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1878         *p++ = cpu_to_be32(0);                          /* UID */
1879         *p++ = cpu_to_be32(0);                          /* GID */
1880         *p = cpu_to_be32(0);                            /* No more gids */
1881 }
1882
1883 static void encode_destroy_session(struct xdr_stream *xdr,
1884                                    const struct nfs4_session *session,
1885                                    struct compound_hdr *hdr)
1886 {
1887         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1888         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1889 }
1890
1891 static void encode_destroy_clientid(struct xdr_stream *xdr,
1892                                    uint64_t clientid,
1893                                    struct compound_hdr *hdr)
1894 {
1895         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1896         encode_uint64(xdr, clientid);
1897 }
1898
1899 static void encode_reclaim_complete(struct xdr_stream *xdr,
1900                                     const struct nfs41_reclaim_complete_args *args,
1901                                     struct compound_hdr *hdr)
1902 {
1903         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1904         encode_uint32(xdr, args->one_fs);
1905 }
1906 #endif /* CONFIG_NFS_V4_1 */
1907
1908 static void encode_sequence(struct xdr_stream *xdr,
1909                             const struct nfs4_sequence_args *args,
1910                             struct compound_hdr *hdr)
1911 {
1912 #if defined(CONFIG_NFS_V4_1)
1913         struct nfs4_session *session;
1914         struct nfs4_slot_table *tp;
1915         struct nfs4_slot *slot = args->sa_slot;
1916         __be32 *p;
1917
1918         tp = slot->table;
1919         session = tp->session;
1920         if (!session)
1921                 return;
1922
1923         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1924
1925         /*
1926          * Sessionid + seqid + slotid + max slotid + cache_this
1927          */
1928         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1929                 "max_slotid=%d cache_this=%d\n",
1930                 __func__,
1931                 ((u32 *)session->sess_id.data)[0],
1932                 ((u32 *)session->sess_id.data)[1],
1933                 ((u32 *)session->sess_id.data)[2],
1934                 ((u32 *)session->sess_id.data)[3],
1935                 slot->seq_nr, slot->slot_nr,
1936                 tp->highest_used_slotid, args->sa_cache_this);
1937         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1938         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1939         *p++ = cpu_to_be32(slot->seq_nr);
1940         *p++ = cpu_to_be32(slot->slot_nr);
1941         *p++ = cpu_to_be32(tp->highest_used_slotid);
1942         *p = cpu_to_be32(args->sa_cache_this);
1943 #endif /* CONFIG_NFS_V4_1 */
1944 }
1945
1946 #ifdef CONFIG_NFS_V4_1
1947 static void
1948 encode_getdeviceinfo(struct xdr_stream *xdr,
1949                      const struct nfs4_getdeviceinfo_args *args,
1950                      struct compound_hdr *hdr)
1951 {
1952         __be32 *p;
1953
1954         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1955         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1956         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1957                                     NFS4_DEVICEID4_SIZE);
1958         *p++ = cpu_to_be32(args->pdev->layout_type);
1959         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1960
1961         p = reserve_space(xdr, 4 + 4);
1962         *p++ = cpu_to_be32(1);                  /* bitmap length */
1963         *p++ = cpu_to_be32(args->notify_types);
1964 }
1965
1966 static void
1967 encode_layoutget(struct xdr_stream *xdr,
1968                       const struct nfs4_layoutget_args *args,
1969                       struct compound_hdr *hdr)
1970 {
1971         __be32 *p;
1972
1973         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1974         p = reserve_space(xdr, 36);
1975         *p++ = cpu_to_be32(0);     /* Signal layout available */
1976         *p++ = cpu_to_be32(args->type);
1977         *p++ = cpu_to_be32(args->range.iomode);
1978         p = xdr_encode_hyper(p, args->range.offset);
1979         p = xdr_encode_hyper(p, args->range.length);
1980         p = xdr_encode_hyper(p, args->minlength);
1981         encode_nfs4_stateid(xdr, &args->stateid);
1982         encode_uint32(xdr, args->maxcount);
1983
1984         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1985                 __func__,
1986                 args->type,
1987                 args->range.iomode,
1988                 (unsigned long)args->range.offset,
1989                 (unsigned long)args->range.length,
1990                 args->maxcount);
1991 }
1992
1993 static int
1994 encode_layoutcommit(struct xdr_stream *xdr,
1995                     struct inode *inode,
1996                     const struct nfs4_layoutcommit_args *args,
1997                     struct compound_hdr *hdr)
1998 {
1999         __be32 *p;
2000
2001         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2002                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2003
2004         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2005         p = reserve_space(xdr, 20);
2006         /* Only whole file layouts */
2007         p = xdr_encode_hyper(p, 0); /* offset */
2008         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2009         *p = cpu_to_be32(0); /* reclaim */
2010         encode_nfs4_stateid(xdr, &args->stateid);
2011         if (args->lastbytewritten != U64_MAX) {
2012                 p = reserve_space(xdr, 20);
2013                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2014                 p = xdr_encode_hyper(p, args->lastbytewritten);
2015         } else {
2016                 p = reserve_space(xdr, 12);
2017                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2018         }
2019         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2020         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2021
2022         encode_uint32(xdr, args->layoutupdate_len);
2023         if (args->layoutupdate_pages)
2024                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025                                 args->layoutupdate_len);
2026
2027         return 0;
2028 }
2029
2030 static void
2031 encode_layoutreturn(struct xdr_stream *xdr,
2032                     const struct nfs4_layoutreturn_args *args,
2033                     struct compound_hdr *hdr)
2034 {
2035         __be32 *p;
2036
2037         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2038         p = reserve_space(xdr, 16);
2039         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2040         *p++ = cpu_to_be32(args->layout_type);
2041         *p++ = cpu_to_be32(args->range.iomode);
2042         *p = cpu_to_be32(RETURN_FILE);
2043         p = reserve_space(xdr, 16);
2044         p = xdr_encode_hyper(p, args->range.offset);
2045         p = xdr_encode_hyper(p, args->range.length);
2046         spin_lock(&args->inode->i_lock);
2047         encode_nfs4_stateid(xdr, &args->stateid);
2048         spin_unlock(&args->inode->i_lock);
2049         if (args->ld_private->ops && args->ld_private->ops->encode)
2050                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2051         else
2052                 encode_uint32(xdr, 0);
2053 }
2054
2055 static int
2056 encode_secinfo_no_name(struct xdr_stream *xdr,
2057                        const struct nfs41_secinfo_no_name_args *args,
2058                        struct compound_hdr *hdr)
2059 {
2060         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2061         encode_uint32(xdr, args->style);
2062         return 0;
2063 }
2064
2065 static void encode_test_stateid(struct xdr_stream *xdr,
2066                                 const struct nfs41_test_stateid_args *args,
2067                                 struct compound_hdr *hdr)
2068 {
2069         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2070         encode_uint32(xdr, 1);
2071         encode_nfs4_stateid(xdr, args->stateid);
2072 }
2073
2074 static void encode_free_stateid(struct xdr_stream *xdr,
2075                                 const struct nfs41_free_stateid_args *args,
2076                                 struct compound_hdr *hdr)
2077 {
2078         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2079         encode_nfs4_stateid(xdr, &args->stateid);
2080 }
2081 #else
2082 static inline void
2083 encode_layoutreturn(struct xdr_stream *xdr,
2084                     const struct nfs4_layoutreturn_args *args,
2085                     struct compound_hdr *hdr)
2086 {
2087 }
2088
2089 static void
2090 encode_layoutget(struct xdr_stream *xdr,
2091                       const struct nfs4_layoutget_args *args,
2092                       struct compound_hdr *hdr)
2093 {
2094 }
2095 #endif /* CONFIG_NFS_V4_1 */
2096
2097 /*
2098  * END OF "GENERIC" ENCODE ROUTINES.
2099  */
2100
2101 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2102 {
2103 #if defined(CONFIG_NFS_V4_1)
2104         struct nfs4_session *session = args->sa_slot->table->session;
2105         if (session)
2106                 return session->clp->cl_mvops->minor_version;
2107 #endif /* CONFIG_NFS_V4_1 */
2108         return 0;
2109 }
2110
2111 /*
2112  * Encode an ACCESS request
2113  */
2114 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2115                                 const void *data)
2116 {
2117         const struct nfs4_accessargs *args = data;
2118         struct compound_hdr hdr = {
2119                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2120         };
2121
2122         encode_compound_hdr(xdr, req, &hdr);
2123         encode_sequence(xdr, &args->seq_args, &hdr);
2124         encode_putfh(xdr, args->fh, &hdr);
2125         encode_access(xdr, args->access, &hdr);
2126         if (args->bitmask)
2127                 encode_getfattr(xdr, args->bitmask, &hdr);
2128         encode_nops(&hdr);
2129 }
2130
2131 /*
2132  * Encode LOOKUP request
2133  */
2134 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2135                                 const void *data)
2136 {
2137         const struct nfs4_lookup_arg *args = data;
2138         struct compound_hdr hdr = {
2139                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140         };
2141
2142         encode_compound_hdr(xdr, req, &hdr);
2143         encode_sequence(xdr, &args->seq_args, &hdr);
2144         encode_putfh(xdr, args->dir_fh, &hdr);
2145         encode_lookup(xdr, args->name, &hdr);
2146         encode_getfh(xdr, &hdr);
2147         encode_getfattr(xdr, args->bitmask, &hdr);
2148         encode_nops(&hdr);
2149 }
2150
2151 /*
2152  * Encode LOOKUPP request
2153  */
2154 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2155                 const void *data)
2156 {
2157         const struct nfs4_lookupp_arg *args = data;
2158         struct compound_hdr hdr = {
2159                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2160         };
2161
2162         encode_compound_hdr(xdr, req, &hdr);
2163         encode_sequence(xdr, &args->seq_args, &hdr);
2164         encode_putfh(xdr, args->fh, &hdr);
2165         encode_lookupp(xdr, &hdr);
2166         encode_getfh(xdr, &hdr);
2167         encode_getfattr(xdr, args->bitmask, &hdr);
2168         encode_nops(&hdr);
2169 }
2170
2171 /*
2172  * Encode LOOKUP_ROOT request
2173  */
2174 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2175                                      struct xdr_stream *xdr,
2176                                      const void *data)
2177 {
2178         const struct nfs4_lookup_root_arg *args = data;
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         encode_compound_hdr(xdr, req, &hdr);
2184         encode_sequence(xdr, &args->seq_args, &hdr);
2185         encode_putrootfh(xdr, &hdr);
2186         encode_getfh(xdr, &hdr);
2187         encode_getfattr(xdr, args->bitmask, &hdr);
2188         encode_nops(&hdr);
2189 }
2190
2191 /*
2192  * Encode REMOVE request
2193  */
2194 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2195                                 const void *data)
2196 {
2197         const struct nfs_removeargs *args = data;
2198         struct compound_hdr hdr = {
2199                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2200         };
2201
2202         encode_compound_hdr(xdr, req, &hdr);
2203         encode_sequence(xdr, &args->seq_args, &hdr);
2204         encode_putfh(xdr, args->fh, &hdr);
2205         encode_remove(xdr, &args->name, &hdr);
2206         encode_nops(&hdr);
2207 }
2208
2209 /*
2210  * Encode RENAME request
2211  */
2212 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2213                                 const void *data)
2214 {
2215         const struct nfs_renameargs *args = data;
2216         struct compound_hdr hdr = {
2217                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218         };
2219
2220         encode_compound_hdr(xdr, req, &hdr);
2221         encode_sequence(xdr, &args->seq_args, &hdr);
2222         encode_putfh(xdr, args->old_dir, &hdr);
2223         encode_savefh(xdr, &hdr);
2224         encode_putfh(xdr, args->new_dir, &hdr);
2225         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2226         encode_nops(&hdr);
2227 }
2228
2229 /*
2230  * Encode LINK request
2231  */
2232 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2233                               const void *data)
2234 {
2235         const struct nfs4_link_arg *args = data;
2236         struct compound_hdr hdr = {
2237                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238         };
2239
2240         encode_compound_hdr(xdr, req, &hdr);
2241         encode_sequence(xdr, &args->seq_args, &hdr);
2242         encode_putfh(xdr, args->fh, &hdr);
2243         encode_savefh(xdr, &hdr);
2244         encode_putfh(xdr, args->dir_fh, &hdr);
2245         encode_link(xdr, args->name, &hdr);
2246         encode_restorefh(xdr, &hdr);
2247         encode_getfattr(xdr, args->bitmask, &hdr);
2248         encode_nops(&hdr);
2249 }
2250
2251 /*
2252  * Encode CREATE request
2253  */
2254 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2255                                 const void *data)
2256 {
2257         const struct nfs4_create_arg *args = data;
2258         struct compound_hdr hdr = {
2259                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260         };
2261
2262         encode_compound_hdr(xdr, req, &hdr);
2263         encode_sequence(xdr, &args->seq_args, &hdr);
2264         encode_putfh(xdr, args->dir_fh, &hdr);
2265         encode_create(xdr, args, &hdr);
2266         encode_getfh(xdr, &hdr);
2267         encode_getfattr(xdr, args->bitmask, &hdr);
2268         encode_nops(&hdr);
2269 }
2270
2271 /*
2272  * Encode SYMLINK request
2273  */
2274 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2275                                  const void *data)
2276 {
2277         const struct nfs4_create_arg *args = data;
2278
2279         nfs4_xdr_enc_create(req, xdr, args);
2280 }
2281
2282 /*
2283  * Encode GETATTR request
2284  */
2285 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2286                                  const void *data)
2287 {
2288         const struct nfs4_getattr_arg *args = data;
2289         struct compound_hdr hdr = {
2290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291         };
2292
2293         encode_compound_hdr(xdr, req, &hdr);
2294         encode_sequence(xdr, &args->seq_args, &hdr);
2295         encode_putfh(xdr, args->fh, &hdr);
2296         encode_getfattr(xdr, args->bitmask, &hdr);
2297         encode_nops(&hdr);
2298 }
2299
2300 /*
2301  * Encode a CLOSE request
2302  */
2303 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2304                                const void *data)
2305 {
2306         const struct nfs_closeargs *args = data;
2307         struct compound_hdr hdr = {
2308                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309         };
2310
2311         encode_compound_hdr(xdr, req, &hdr);
2312         encode_sequence(xdr, &args->seq_args, &hdr);
2313         encode_putfh(xdr, args->fh, &hdr);
2314         if (args->lr_args)
2315                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2316         if (args->bitmask != NULL)
2317                 encode_getfattr(xdr, args->bitmask, &hdr);
2318         encode_close(xdr, args, &hdr);
2319         encode_nops(&hdr);
2320 }
2321
2322 /*
2323  * Encode an OPEN request
2324  */
2325 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2326                               const void *data)
2327 {
2328         const struct nfs_openargs *args = data;
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         encode_compound_hdr(xdr, req, &hdr);
2334         encode_sequence(xdr, &args->seq_args, &hdr);
2335         encode_putfh(xdr, args->fh, &hdr);
2336         encode_open(xdr, args, &hdr);
2337         encode_getfh(xdr, &hdr);
2338         if (args->access)
2339                 encode_access(xdr, args->access, &hdr);
2340         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2341         if (args->lg_args) {
2342                 encode_layoutget(xdr, args->lg_args, &hdr);
2343                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2344                                         args->lg_args->layout.pglen,
2345                                         hdr.replen);
2346         }
2347         encode_nops(&hdr);
2348 }
2349
2350 /*
2351  * Encode an OPEN_CONFIRM request
2352  */
2353 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2354                                       struct xdr_stream *xdr,
2355                                       const void *data)
2356 {
2357         const struct nfs_open_confirmargs *args = data;
2358         struct compound_hdr hdr = {
2359                 .nops   = 0,
2360         };
2361
2362         encode_compound_hdr(xdr, req, &hdr);
2363         encode_putfh(xdr, args->fh, &hdr);
2364         encode_open_confirm(xdr, args, &hdr);
2365         encode_nops(&hdr);
2366 }
2367
2368 /*
2369  * Encode an OPEN request with no attributes.
2370  */
2371 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2372                                      struct xdr_stream *xdr,
2373                                      const void *data)
2374 {
2375         const struct nfs_openargs *args = data;
2376         struct compound_hdr hdr = {
2377                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2378         };
2379
2380         encode_compound_hdr(xdr, req, &hdr);
2381         encode_sequence(xdr, &args->seq_args, &hdr);
2382         encode_putfh(xdr, args->fh, &hdr);
2383         encode_open(xdr, args, &hdr);
2384         if (args->access)
2385                 encode_access(xdr, args->access, &hdr);
2386         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2387         if (args->lg_args) {
2388                 encode_layoutget(xdr, args->lg_args, &hdr);
2389                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2390                                         args->lg_args->layout.pglen,
2391                                         hdr.replen);
2392         }
2393         encode_nops(&hdr);
2394 }
2395
2396 /*
2397  * Encode an OPEN_DOWNGRADE request
2398  */
2399 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2400                                         struct xdr_stream *xdr,
2401                                         const void *data)
2402 {
2403         const struct nfs_closeargs *args = data;
2404         struct compound_hdr hdr = {
2405                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2406         };
2407
2408         encode_compound_hdr(xdr, req, &hdr);
2409         encode_sequence(xdr, &args->seq_args, &hdr);
2410         encode_putfh(xdr, args->fh, &hdr);
2411         if (args->lr_args)
2412                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2413         encode_open_downgrade(xdr, args, &hdr);
2414         encode_nops(&hdr);
2415 }
2416
2417 /*
2418  * Encode a LOCK request
2419  */
2420 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2421                               const void *data)
2422 {
2423         const struct nfs_lock_args *args = data;
2424         struct compound_hdr hdr = {
2425                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2426         };
2427
2428         encode_compound_hdr(xdr, req, &hdr);
2429         encode_sequence(xdr, &args->seq_args, &hdr);
2430         encode_putfh(xdr, args->fh, &hdr);
2431         encode_lock(xdr, args, &hdr);
2432         encode_nops(&hdr);
2433 }
2434
2435 /*
2436  * Encode a LOCKT request
2437  */
2438 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2439                                const void *data)
2440 {
2441         const struct nfs_lockt_args *args = data;
2442         struct compound_hdr hdr = {
2443                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444         };
2445
2446         encode_compound_hdr(xdr, req, &hdr);
2447         encode_sequence(xdr, &args->seq_args, &hdr);
2448         encode_putfh(xdr, args->fh, &hdr);
2449         encode_lockt(xdr, args, &hdr);
2450         encode_nops(&hdr);
2451 }
2452
2453 /*
2454  * Encode a LOCKU request
2455  */
2456 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2457                                const void *data)
2458 {
2459         const struct nfs_locku_args *args = data;
2460         struct compound_hdr hdr = {
2461                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462         };
2463
2464         encode_compound_hdr(xdr, req, &hdr);
2465         encode_sequence(xdr, &args->seq_args, &hdr);
2466         encode_putfh(xdr, args->fh, &hdr);
2467         encode_locku(xdr, args, &hdr);
2468         encode_nops(&hdr);
2469 }
2470
2471 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2472                                            struct xdr_stream *xdr,
2473                                            const void *data)
2474 {
2475         const struct nfs_release_lockowner_args *args = data;
2476         struct compound_hdr hdr = {
2477                 .minorversion = 0,
2478         };
2479
2480         encode_compound_hdr(xdr, req, &hdr);
2481         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2482         encode_nops(&hdr);
2483 }
2484
2485 /*
2486  * Encode a READLINK request
2487  */
2488 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2489                                   const void *data)
2490 {
2491         const struct nfs4_readlink *args = data;
2492         struct compound_hdr hdr = {
2493                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2494         };
2495
2496         encode_compound_hdr(xdr, req, &hdr);
2497         encode_sequence(xdr, &args->seq_args, &hdr);
2498         encode_putfh(xdr, args->fh, &hdr);
2499         encode_readlink(xdr, args, req, &hdr);
2500
2501         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2502                                 args->pglen, hdr.replen);
2503         encode_nops(&hdr);
2504 }
2505
2506 /*
2507  * Encode a READDIR request
2508  */
2509 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2510                                  const void *data)
2511 {
2512         const struct nfs4_readdir_arg *args = data;
2513         struct compound_hdr hdr = {
2514                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2515         };
2516
2517         encode_compound_hdr(xdr, req, &hdr);
2518         encode_sequence(xdr, &args->seq_args, &hdr);
2519         encode_putfh(xdr, args->fh, &hdr);
2520         encode_readdir(xdr, args, req, &hdr);
2521
2522         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2523                                 args->count, hdr.replen);
2524         encode_nops(&hdr);
2525 }
2526
2527 /*
2528  * Encode a READ request
2529  */
2530 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2531                               const void *data)
2532 {
2533         const struct nfs_pgio_args *args = data;
2534         struct compound_hdr hdr = {
2535                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2536         };
2537
2538         encode_compound_hdr(xdr, req, &hdr);
2539         encode_sequence(xdr, &args->seq_args, &hdr);
2540         encode_putfh(xdr, args->fh, &hdr);
2541         encode_read(xdr, args, &hdr);
2542
2543         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2544                                 args->count, hdr.replen);
2545         req->rq_rcv_buf.flags |= XDRBUF_READ;
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  * Encode an SETATTR request
2551  */
2552 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2553                                  const void *data)
2554 {
2555         const struct nfs_setattrargs *args = data;
2556         struct compound_hdr hdr = {
2557                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558         };
2559
2560         encode_compound_hdr(xdr, req, &hdr);
2561         encode_sequence(xdr, &args->seq_args, &hdr);
2562         encode_putfh(xdr, args->fh, &hdr);
2563         encode_setattr(xdr, args, args->server, &hdr);
2564         encode_getfattr(xdr, args->bitmask, &hdr);
2565         encode_nops(&hdr);
2566 }
2567
2568 /*
2569  * Encode a GETACL request
2570  */
2571 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2572                                 const void *data)
2573 {
2574         const struct nfs_getaclargs *args = data;
2575         struct compound_hdr hdr = {
2576                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577         };
2578         const __u32 nfs4_acl_bitmap[1] = {
2579                 [0] = FATTR4_WORD0_ACL,
2580         };
2581         uint32_t replen;
2582
2583         encode_compound_hdr(xdr, req, &hdr);
2584         encode_sequence(xdr, &args->seq_args, &hdr);
2585         encode_putfh(xdr, args->fh, &hdr);
2586         replen = hdr.replen + op_decode_hdr_maxsz;
2587         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2588                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2589
2590         rpc_prepare_reply_pages(req, args->acl_pages, 0,
2591                                 args->acl_len, replen);
2592         encode_nops(&hdr);
2593 }
2594
2595 /*
2596  * Encode a WRITE request
2597  */
2598 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2599                                const void *data)
2600 {
2601         const struct nfs_pgio_args *args = data;
2602         struct compound_hdr hdr = {
2603                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2604         };
2605
2606         encode_compound_hdr(xdr, req, &hdr);
2607         encode_sequence(xdr, &args->seq_args, &hdr);
2608         encode_putfh(xdr, args->fh, &hdr);
2609         encode_write(xdr, args, &hdr);
2610         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2611         if (args->bitmask)
2612                 encode_getfattr(xdr, args->bitmask, &hdr);
2613         encode_nops(&hdr);
2614 }
2615
2616 /*
2617  *  a COMMIT request
2618  */
2619 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2620                                 const void *data)
2621 {
2622         const struct nfs_commitargs *args = data;
2623         struct compound_hdr hdr = {
2624                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2625         };
2626
2627         encode_compound_hdr(xdr, req, &hdr);
2628         encode_sequence(xdr, &args->seq_args, &hdr);
2629         encode_putfh(xdr, args->fh, &hdr);
2630         encode_commit(xdr, args, &hdr);
2631         encode_nops(&hdr);
2632 }
2633
2634 /*
2635  * FSINFO request
2636  */
2637 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2638                                 const void *data)
2639 {
2640         const struct nfs4_fsinfo_arg *args = data;
2641         struct compound_hdr hdr = {
2642                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643         };
2644
2645         encode_compound_hdr(xdr, req, &hdr);
2646         encode_sequence(xdr, &args->seq_args, &hdr);
2647         encode_putfh(xdr, args->fh, &hdr);
2648         encode_fsinfo(xdr, args->bitmask, &hdr);
2649         encode_nops(&hdr);
2650 }
2651
2652 /*
2653  * a PATHCONF request
2654  */
2655 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2656                                   const void *data)
2657 {
2658         const struct nfs4_pathconf_arg *args = data;
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->fh, &hdr);
2666         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2667                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2668         encode_nops(&hdr);
2669 }
2670
2671 /*
2672  * a STATFS request
2673  */
2674 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2675                                 const void *data)
2676 {
2677         const struct nfs4_statfs_arg *args = data;
2678         struct compound_hdr hdr = {
2679                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2680         };
2681
2682         encode_compound_hdr(xdr, req, &hdr);
2683         encode_sequence(xdr, &args->seq_args, &hdr);
2684         encode_putfh(xdr, args->fh, &hdr);
2685         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2686                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2687         encode_nops(&hdr);
2688 }
2689
2690 /*
2691  * GETATTR_BITMAP request
2692  */
2693 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2694                                      struct xdr_stream *xdr,
2695                                      const void *data)
2696 {
2697         const struct nfs4_server_caps_arg *args = data;
2698         const u32 *bitmask = args->bitmask;
2699         struct compound_hdr hdr = {
2700                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701         };
2702
2703         encode_compound_hdr(xdr, req, &hdr);
2704         encode_sequence(xdr, &args->seq_args, &hdr);
2705         encode_putfh(xdr, args->fhandle, &hdr);
2706         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2707         encode_nops(&hdr);
2708 }
2709
2710 /*
2711  * a RENEW request
2712  */
2713 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2714                                const void *data)
2715
2716 {
2717         const struct nfs_client *clp = data;
2718         struct compound_hdr hdr = {
2719                 .nops   = 0,
2720         };
2721
2722         encode_compound_hdr(xdr, req, &hdr);
2723         encode_renew(xdr, clp->cl_clientid, &hdr);
2724         encode_nops(&hdr);
2725 }
2726
2727 /*
2728  * a SETCLIENTID request
2729  */
2730 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2731                                      struct xdr_stream *xdr,
2732                                      const void *data)
2733 {
2734         const struct nfs4_setclientid *sc = data;
2735         struct compound_hdr hdr = {
2736                 .nops   = 0,
2737         };
2738
2739         encode_compound_hdr(xdr, req, &hdr);
2740         encode_setclientid(xdr, sc, &hdr);
2741         encode_nops(&hdr);
2742 }
2743
2744 /*
2745  * a SETCLIENTID_CONFIRM request
2746  */
2747 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2748                                              struct xdr_stream *xdr,
2749                                              const void *data)
2750 {
2751         const struct nfs4_setclientid_res *arg = data;
2752         struct compound_hdr hdr = {
2753                 .nops   = 0,
2754         };
2755
2756         encode_compound_hdr(xdr, req, &hdr);
2757         encode_setclientid_confirm(xdr, arg, &hdr);
2758         encode_nops(&hdr);
2759 }
2760
2761 /*
2762  * DELEGRETURN request
2763  */
2764 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2765                                      struct xdr_stream *xdr,
2766                                      const void *data)
2767 {
2768         const struct nfs4_delegreturnargs *args = data;
2769         struct compound_hdr hdr = {
2770                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2771         };
2772
2773         encode_compound_hdr(xdr, req, &hdr);
2774         encode_sequence(xdr, &args->seq_args, &hdr);
2775         encode_putfh(xdr, args->fhandle, &hdr);
2776         if (args->lr_args)
2777                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2778         if (args->bitmask)
2779                 encode_getfattr(xdr, args->bitmask, &hdr);
2780         encode_delegreturn(xdr, args->stateid, &hdr);
2781         encode_nops(&hdr);
2782 }
2783
2784 /*
2785  * Encode FS_LOCATIONS request
2786  */
2787 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2788                                       struct xdr_stream *xdr,
2789                                       const void *data)
2790 {
2791         const struct nfs4_fs_locations_arg *args = data;
2792         struct compound_hdr hdr = {
2793                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2794         };
2795         uint32_t replen;
2796
2797         encode_compound_hdr(xdr, req, &hdr);
2798         encode_sequence(xdr, &args->seq_args, &hdr);
2799         if (args->migration) {
2800                 encode_putfh(xdr, args->fh, &hdr);
2801                 replen = hdr.replen;
2802                 encode_fs_locations(xdr, args->bitmask, &hdr);
2803                 if (args->renew)
2804                         encode_renew(xdr, args->clientid, &hdr);
2805         } else {
2806                 encode_putfh(xdr, args->dir_fh, &hdr);
2807                 encode_lookup(xdr, args->name, &hdr);
2808                 replen = hdr.replen;
2809                 encode_fs_locations(xdr, args->bitmask, &hdr);
2810         }
2811
2812         rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2813                                 PAGE_SIZE, replen);
2814         encode_nops(&hdr);
2815 }
2816
2817 /*
2818  * Encode SECINFO request
2819  */
2820 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2821                                 struct xdr_stream *xdr,
2822                                 const void *data)
2823 {
2824         const struct nfs4_secinfo_arg *args = data;
2825         struct compound_hdr hdr = {
2826                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2827         };
2828
2829         encode_compound_hdr(xdr, req, &hdr);
2830         encode_sequence(xdr, &args->seq_args, &hdr);
2831         encode_putfh(xdr, args->dir_fh, &hdr);
2832         encode_secinfo(xdr, args->name, &hdr);
2833         encode_nops(&hdr);
2834 }
2835
2836 /*
2837  * Encode FSID_PRESENT request
2838  */
2839 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2840                                       struct xdr_stream *xdr,
2841                                       const void *data)
2842 {
2843         const struct nfs4_fsid_present_arg *args = data;
2844         struct compound_hdr hdr = {
2845                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2846         };
2847
2848         encode_compound_hdr(xdr, req, &hdr);
2849         encode_sequence(xdr, &args->seq_args, &hdr);
2850         encode_putfh(xdr, args->fh, &hdr);
2851         encode_getfh(xdr, &hdr);
2852         if (args->renew)
2853                 encode_renew(xdr, args->clientid, &hdr);
2854         encode_nops(&hdr);
2855 }
2856
2857 #if defined(CONFIG_NFS_V4_1)
2858 /*
2859  * BIND_CONN_TO_SESSION request
2860  */
2861 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2862                                 struct xdr_stream *xdr,
2863                                 const void *data)
2864 {
2865         const struct nfs41_bind_conn_to_session_args *args = data;
2866         struct compound_hdr hdr = {
2867                 .minorversion = args->client->cl_mvops->minor_version,
2868         };
2869
2870         encode_compound_hdr(xdr, req, &hdr);
2871         encode_bind_conn_to_session(xdr, args, &hdr);
2872         encode_nops(&hdr);
2873 }
2874
2875 /*
2876  * EXCHANGE_ID request
2877  */
2878 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2879                                      struct xdr_stream *xdr,
2880                                      const void *data)
2881 {
2882         const struct nfs41_exchange_id_args *args = data;
2883         struct compound_hdr hdr = {
2884                 .minorversion = args->client->cl_mvops->minor_version,
2885         };
2886
2887         encode_compound_hdr(xdr, req, &hdr);
2888         encode_exchange_id(xdr, args, &hdr);
2889         encode_nops(&hdr);
2890 }
2891
2892 /*
2893  * a CREATE_SESSION request
2894  */
2895 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2896                                         struct xdr_stream *xdr,
2897                                         const void *data)
2898 {
2899         const struct nfs41_create_session_args *args = data;
2900         struct compound_hdr hdr = {
2901                 .minorversion = args->client->cl_mvops->minor_version,
2902         };
2903
2904         encode_compound_hdr(xdr, req, &hdr);
2905         encode_create_session(xdr, args, &hdr);
2906         encode_nops(&hdr);
2907 }
2908
2909 /*
2910  * a DESTROY_SESSION request
2911  */
2912 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2913                                          struct xdr_stream *xdr,
2914                                          const void *data)
2915 {
2916         const struct nfs4_session *session = data;
2917         struct compound_hdr hdr = {
2918                 .minorversion = session->clp->cl_mvops->minor_version,
2919         };
2920
2921         encode_compound_hdr(xdr, req, &hdr);
2922         encode_destroy_session(xdr, session, &hdr);
2923         encode_nops(&hdr);
2924 }
2925
2926 /*
2927  * a DESTROY_CLIENTID request
2928  */
2929 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2930                                          struct xdr_stream *xdr,
2931                                          const void *data)
2932 {
2933         const struct nfs_client *clp = data;
2934         struct compound_hdr hdr = {
2935                 .minorversion = clp->cl_mvops->minor_version,
2936         };
2937
2938         encode_compound_hdr(xdr, req, &hdr);
2939         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2940         encode_nops(&hdr);
2941 }
2942
2943 /*
2944  * a SEQUENCE request
2945  */
2946 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2947                                   const void *data)
2948 {
2949         const struct nfs4_sequence_args *args = data;
2950         struct compound_hdr hdr = {
2951                 .minorversion = nfs4_xdr_minorversion(args),
2952         };
2953
2954         encode_compound_hdr(xdr, req, &hdr);
2955         encode_sequence(xdr, args, &hdr);
2956         encode_nops(&hdr);
2957 }
2958
2959 /*
2960  * a GET_LEASE_TIME request
2961  */
2962 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2963                                         struct xdr_stream *xdr,
2964                                         const void *data)
2965 {
2966         const struct nfs4_get_lease_time_args *args = data;
2967         struct compound_hdr hdr = {
2968                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2969         };
2970         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2971
2972         encode_compound_hdr(xdr, req, &hdr);
2973         encode_sequence(xdr, &args->la_seq_args, &hdr);
2974         encode_putrootfh(xdr, &hdr);
2975         encode_fsinfo(xdr, lease_bitmap, &hdr);
2976         encode_nops(&hdr);
2977 }
2978
2979 /*
2980  * a RECLAIM_COMPLETE request
2981  */
2982 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2983                                           struct xdr_stream *xdr,
2984                                           const void *data)
2985 {
2986         const struct nfs41_reclaim_complete_args *args = data;
2987         struct compound_hdr hdr = {
2988                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2989         };
2990
2991         encode_compound_hdr(xdr, req, &hdr);
2992         encode_sequence(xdr, &args->seq_args, &hdr);
2993         encode_reclaim_complete(xdr, args, &hdr);
2994         encode_nops(&hdr);
2995 }
2996
2997 /*
2998  * Encode GETDEVICEINFO request
2999  */
3000 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3001                                        struct xdr_stream *xdr,
3002                                        const void *data)
3003 {
3004         const struct nfs4_getdeviceinfo_args *args = data;
3005         struct compound_hdr hdr = {
3006                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3007         };
3008
3009         encode_compound_hdr(xdr, req, &hdr);
3010         encode_sequence(xdr, &args->seq_args, &hdr);
3011         encode_getdeviceinfo(xdr, args, &hdr);
3012
3013         /* set up reply kvec. Subtract notification bitmap max size (2)
3014          * so that notification bitmap is put in xdr_buf tail */
3015         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3016                                 args->pdev->pglen, hdr.replen - 2);
3017         encode_nops(&hdr);
3018 }
3019
3020 /*
3021  *  Encode LAYOUTGET request
3022  */
3023 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3024                                    struct xdr_stream *xdr,
3025                                    const void *data)
3026 {
3027         const struct nfs4_layoutget_args *args = data;
3028         struct compound_hdr hdr = {
3029                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3030         };
3031
3032         encode_compound_hdr(xdr, req, &hdr);
3033         encode_sequence(xdr, &args->seq_args, &hdr);
3034         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3035         encode_layoutget(xdr, args, &hdr);
3036
3037         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3038                                 args->layout.pglen, hdr.replen);
3039         encode_nops(&hdr);
3040 }
3041
3042 /*
3043  *  Encode LAYOUTCOMMIT request
3044  */
3045 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3046                                       struct xdr_stream *xdr,
3047                                       const void *priv)
3048 {
3049         const struct nfs4_layoutcommit_args *args = priv;
3050         struct nfs4_layoutcommit_data *data =
3051                 container_of(args, struct nfs4_layoutcommit_data, args);
3052         struct compound_hdr hdr = {
3053                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3054         };
3055
3056         encode_compound_hdr(xdr, req, &hdr);
3057         encode_sequence(xdr, &args->seq_args, &hdr);
3058         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3059         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3060         encode_getfattr(xdr, args->bitmask, &hdr);
3061         encode_nops(&hdr);
3062 }
3063
3064 /*
3065  * Encode LAYOUTRETURN request
3066  */
3067 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3068                                       struct xdr_stream *xdr,
3069                                       const void *data)
3070 {
3071         const struct nfs4_layoutreturn_args *args = data;
3072         struct compound_hdr hdr = {
3073                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3074         };
3075
3076         encode_compound_hdr(xdr, req, &hdr);
3077         encode_sequence(xdr, &args->seq_args, &hdr);
3078         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3079         encode_layoutreturn(xdr, args, &hdr);
3080         encode_nops(&hdr);
3081 }
3082
3083 /*
3084  * Encode SECINFO_NO_NAME request
3085  */
3086 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3087                                         struct xdr_stream *xdr,
3088                                         const void *data)
3089 {
3090         const struct nfs41_secinfo_no_name_args *args = data;
3091         struct compound_hdr hdr = {
3092                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3093         };
3094
3095         encode_compound_hdr(xdr, req, &hdr);
3096         encode_sequence(xdr, &args->seq_args, &hdr);
3097         encode_putrootfh(xdr, &hdr);
3098         encode_secinfo_no_name(xdr, args, &hdr);
3099         encode_nops(&hdr);
3100 }
3101
3102 /*
3103  *  Encode TEST_STATEID request
3104  */
3105 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3106                                       struct xdr_stream *xdr,
3107                                       const void *data)
3108 {
3109         const struct nfs41_test_stateid_args *args = data;
3110         struct compound_hdr hdr = {
3111                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3112         };
3113
3114         encode_compound_hdr(xdr, req, &hdr);
3115         encode_sequence(xdr, &args->seq_args, &hdr);
3116         encode_test_stateid(xdr, args, &hdr);
3117         encode_nops(&hdr);
3118 }
3119
3120 /*
3121  *  Encode FREE_STATEID request
3122  */
3123 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3124                                      struct xdr_stream *xdr,
3125                                      const void *data)
3126 {
3127         const struct nfs41_free_stateid_args *args = data;
3128         struct compound_hdr hdr = {
3129                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3130         };
3131
3132         encode_compound_hdr(xdr, req, &hdr);
3133         encode_sequence(xdr, &args->seq_args, &hdr);
3134         encode_free_stateid(xdr, args, &hdr);
3135         encode_nops(&hdr);
3136 }
3137 #endif /* CONFIG_NFS_V4_1 */
3138
3139 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3140 {
3141         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3142                         NFS4_OPAQUE_LIMIT);
3143         if (unlikely(ret < 0))
3144                 return -EIO;
3145         *len = ret;
3146         return 0;
3147 }
3148
3149 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3150 {
3151         __be32 *p;
3152
3153         p = xdr_inline_decode(xdr, 8);
3154         if (unlikely(!p))
3155                 return -EIO;
3156         hdr->status = be32_to_cpup(p++);
3157         hdr->taglen = be32_to_cpup(p);
3158
3159         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3160         if (unlikely(!p))
3161                 return -EIO;
3162         hdr->tag = (char *)p;
3163         p += XDR_QUADLEN(hdr->taglen);
3164         hdr->nops = be32_to_cpup(p);
3165         if (unlikely(hdr->nops < 1))
3166                 return nfs4_stat_to_errno(hdr->status);
3167         return 0;
3168 }
3169
3170 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3171                 int *nfs_retval)
3172 {
3173         __be32 *p;
3174         uint32_t opnum;
3175         int32_t nfserr;
3176
3177         p = xdr_inline_decode(xdr, 8);
3178         if (unlikely(!p))
3179                 goto out_overflow;
3180         opnum = be32_to_cpup(p++);
3181         if (unlikely(opnum != expected))
3182                 goto out_bad_operation;
3183         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3184                 goto out_status;
3185         *nfs_retval = 0;
3186         return true;
3187 out_status:
3188         nfserr = be32_to_cpup(p);
3189         trace_nfs4_xdr_status(opnum, nfserr);
3190         *nfs_retval = nfs4_stat_to_errno(nfserr);
3191         return true;
3192 out_bad_operation:
3193         dprintk("nfs: Server returned operation"
3194                 " %d but we issued a request for %d\n",
3195                         opnum, expected);
3196         *nfs_retval = -EREMOTEIO;
3197         return false;
3198 out_overflow:
3199         *nfs_retval = -EIO;
3200         return false;
3201 }
3202
3203 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3204 {
3205         int retval;
3206
3207         __decode_op_hdr(xdr, expected, &retval);
3208         return retval;
3209 }
3210
3211 /* Dummy routine */
3212 static int decode_ace(struct xdr_stream *xdr, void *ace)
3213 {
3214         __be32 *p;
3215         unsigned int strlen;
3216         char *str;
3217
3218         p = xdr_inline_decode(xdr, 12);
3219         if (unlikely(!p))
3220                 return -EIO;
3221         return decode_opaque_inline(xdr, &strlen, &str);
3222 }
3223
3224 static ssize_t
3225 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3226 {
3227         ssize_t ret;
3228
3229         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3230         if (likely(ret >= 0))
3231                 return ret;
3232         if (ret != -EMSGSIZE)
3233                 return -EIO;
3234         return sz;
3235 }
3236
3237 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3238 {
3239         ssize_t ret;
3240         ret = decode_bitmap4(xdr, bitmap, 3);
3241         return ret < 0 ? ret : 0;
3242 }
3243
3244 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3245 {
3246         __be32 *p;
3247
3248         p = xdr_inline_decode(xdr, 4);
3249         if (unlikely(!p))
3250                 return -EIO;
3251         *attrlen = be32_to_cpup(p);
3252         *savep = xdr_stream_pos(xdr);
3253         return 0;
3254 }
3255
3256 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3257 {
3258         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3259                 int ret;
3260                 ret = decode_attr_bitmap(xdr, bitmask);
3261                 if (unlikely(ret < 0))
3262                         return ret;
3263                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3264         } else
3265                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3266         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3267                 bitmask[0], bitmask[1], bitmask[2]);
3268         return 0;
3269 }
3270
3271 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3272 {
3273         __be32 *p;
3274         int ret = 0;
3275
3276         *type = 0;
3277         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3278                 return -EIO;
3279         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3280                 p = xdr_inline_decode(xdr, 4);
3281                 if (unlikely(!p))
3282                         return -EIO;
3283                 *type = be32_to_cpup(p);
3284                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3285                         dprintk("%s: bad type %d\n", __func__, *type);
3286                         return -EIO;
3287                 }
3288                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3289                 ret = NFS_ATTR_FATTR_TYPE;
3290         }
3291         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3292         return ret;
3293 }
3294
3295 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3296                                       uint32_t *bitmap, uint32_t *type)
3297 {
3298         __be32 *p;
3299
3300         *type = 0;
3301         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3302                 return -EIO;
3303         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3304                 p = xdr_inline_decode(xdr, 4);
3305                 if (unlikely(!p))
3306                         return -EIO;
3307                 *type = be32_to_cpup(p);
3308                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3309         }
3310         dprintk("%s: expire type=0x%x\n", __func__, *type);
3311         return 0;
3312 }
3313
3314 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3315 {
3316         __be32 *p;
3317         int ret = 0;
3318
3319         *change = 0;
3320         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3321                 return -EIO;
3322         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3323                 p = xdr_inline_decode(xdr, 8);
3324                 if (unlikely(!p))
3325                         return -EIO;
3326                 xdr_decode_hyper(p, change);
3327                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3328                 ret = NFS_ATTR_FATTR_CHANGE;
3329         }
3330         dprintk("%s: change attribute=%Lu\n", __func__,
3331                         (unsigned long long)*change);
3332         return ret;
3333 }
3334
3335 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3336 {
3337         __be32 *p;
3338         int ret = 0;
3339
3340         *size = 0;
3341         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3342                 return -EIO;
3343         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3344                 p = xdr_inline_decode(xdr, 8);
3345                 if (unlikely(!p))
3346                         return -EIO;
3347                 xdr_decode_hyper(p, size);
3348                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3349                 ret = NFS_ATTR_FATTR_SIZE;
3350         }
3351         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3352         return ret;
3353 }
3354
3355 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3356 {
3357         __be32 *p;
3358
3359         *res = 0;
3360         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3361                 return -EIO;
3362         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3363                 p = xdr_inline_decode(xdr, 4);
3364                 if (unlikely(!p))
3365                         return -EIO;
3366                 *res = be32_to_cpup(p);
3367                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3368         }
3369         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3370         return 0;
3371 }
3372
3373 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3374 {
3375         __be32 *p;
3376
3377         *res = 0;
3378         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3379                 return -EIO;
3380         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3381                 p = xdr_inline_decode(xdr, 4);
3382                 if (unlikely(!p))
3383                         return -EIO;
3384                 *res = be32_to_cpup(p);
3385                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3386         }
3387         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3388         return 0;
3389 }
3390
3391 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3392 {
3393         __be32 *p;
3394         int ret = 0;
3395
3396         fsid->major = 0;
3397         fsid->minor = 0;
3398         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3399                 return -EIO;
3400         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3401                 p = xdr_inline_decode(xdr, 16);
3402                 if (unlikely(!p))
3403                         return -EIO;
3404                 p = xdr_decode_hyper(p, &fsid->major);
3405                 xdr_decode_hyper(p, &fsid->minor);
3406                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3407                 ret = NFS_ATTR_FATTR_FSID;
3408         }
3409         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3410                         (unsigned long long)fsid->major,
3411                         (unsigned long long)fsid->minor);
3412         return ret;
3413 }
3414
3415 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3416 {
3417         __be32 *p;
3418
3419         *res = 60;
3420         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3421                 return -EIO;
3422         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3423                 p = xdr_inline_decode(xdr, 4);
3424                 if (unlikely(!p))
3425                         return -EIO;
3426                 *res = be32_to_cpup(p);
3427                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3428         }
3429         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3430         return 0;
3431 }
3432
3433 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3434 {
3435         __be32 *p;
3436
3437         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3438                 return -EIO;
3439         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3440                 p = xdr_inline_decode(xdr, 4);
3441                 if (unlikely(!p))
3442                         return -EIO;
3443                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3444                 *res = -be32_to_cpup(p);
3445         }
3446         return 0;
3447 }
3448
3449 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3450                                  uint32_t *bitmap, uint32_t *bitmask)
3451 {
3452         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3453                 int ret;
3454                 ret = decode_attr_bitmap(xdr, bitmask);
3455                 if (unlikely(ret < 0))
3456                         return ret;
3457                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3458         } else
3459                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3460         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3461                 bitmask[0], bitmask[1], bitmask[2]);
3462         return 0;
3463 }
3464
3465 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3466 {
3467         __be32 *p;
3468         u32 len;
3469
3470         if (fh != NULL)
3471                 memset(fh, 0, sizeof(*fh));
3472
3473         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3474                 return -EIO;
3475         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3476                 p = xdr_inline_decode(xdr, 4);
3477                 if (unlikely(!p))
3478                         return -EIO;
3479                 len = be32_to_cpup(p);
3480                 if (len > NFS4_FHSIZE)
3481                         return -EIO;
3482                 p = xdr_inline_decode(xdr, len);
3483                 if (unlikely(!p))
3484                         return -EIO;
3485                 if (fh != NULL) {
3486                         memcpy(fh->data, p, len);
3487                         fh->size = len;
3488                 }
3489                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3490         }
3491         return 0;
3492 }
3493
3494 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3495 {
3496         __be32 *p;
3497
3498         *res = 0;
3499         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3500                 return -EIO;
3501         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3502                 p = xdr_inline_decode(xdr, 4);
3503                 if (unlikely(!p))
3504                         return -EIO;
3505                 *res = be32_to_cpup(p);
3506                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3507         }
3508         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3509         return 0;
3510 }
3511
3512 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3513 {
3514         __be32 *p;
3515         int ret = 0;
3516
3517         *fileid = 0;
3518         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3519                 return -EIO;
3520         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3521                 p = xdr_inline_decode(xdr, 8);
3522                 if (unlikely(!p))
3523                         return -EIO;
3524                 xdr_decode_hyper(p, fileid);
3525                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3526                 ret = NFS_ATTR_FATTR_FILEID;
3527         }
3528         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3529         return ret;
3530 }
3531
3532 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3533 {
3534         __be32 *p;
3535         int ret = 0;
3536
3537         *fileid = 0;
3538         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3539                 return -EIO;
3540         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3541                 p = xdr_inline_decode(xdr, 8);
3542                 if (unlikely(!p))
3543                         return -EIO;
3544                 xdr_decode_hyper(p, fileid);
3545                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3546                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3547         }
3548         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3549         return ret;
3550 }
3551
3552 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3553 {
3554         __be32 *p;
3555         int status = 0;
3556
3557         *res = 0;
3558         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3559                 return -EIO;
3560         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3561                 p = xdr_inline_decode(xdr, 8);
3562                 if (unlikely(!p))
3563                         return -EIO;
3564                 xdr_decode_hyper(p, res);
3565                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3566         }
3567         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3568         return status;
3569 }
3570
3571 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3572 {
3573         __be32 *p;
3574         int status = 0;
3575
3576         *res = 0;
3577         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3578                 return -EIO;
3579         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3580                 p = xdr_inline_decode(xdr, 8);
3581                 if (unlikely(!p))
3582                         return -EIO;
3583                 xdr_decode_hyper(p, res);
3584                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3585         }
3586         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3587         return status;
3588 }
3589
3590 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3591 {
3592         __be32 *p;
3593         int status = 0;
3594
3595         *res = 0;
3596         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3597                 return -EIO;
3598         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3599                 p = xdr_inline_decode(xdr, 8);
3600                 if (unlikely(!p))
3601                         return -EIO;
3602                 xdr_decode_hyper(p, res);
3603                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3604         }
3605         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3606         return status;
3607 }
3608
3609 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3610 {
3611         u32 n;
3612         __be32 *p;
3613         int status = 0;
3614
3615         p = xdr_inline_decode(xdr, 4);
3616         if (unlikely(!p))
3617                 return -EIO;
3618         n = be32_to_cpup(p);
3619         if (n == 0)
3620                 goto root_path;
3621         dprintk("pathname4: ");
3622         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3623                 dprintk("cannot parse %d components in path\n", n);
3624                 goto out_eio;
3625         }
3626         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3627                 struct nfs4_string *component = &path->components[path->ncomponents];
3628                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3629                 if (unlikely(status != 0))
3630                         goto out_eio;
3631                 ifdebug (XDR)
3632                         pr_cont("%s%.*s ",
3633                                 (path->ncomponents != n ? "/ " : ""),
3634                                 component->len, component->data);
3635         }
3636 out:
3637         return status;
3638 root_path:
3639 /* a root pathname is sent as a zero component4 */
3640         path->ncomponents = 1;
3641         path->components[0].len=0;
3642         path->components[0].data=NULL;
3643         dprintk("pathname4: /\n");
3644         goto out;
3645 out_eio:
3646         dprintk(" status %d", status);
3647         status = -EIO;
3648         goto out;
3649 }
3650
3651 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3652 {
3653         int n;
3654         __be32 *p;
3655         int status = -EIO;
3656
3657         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3658                 goto out;
3659         status = 0;
3660         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3661                 goto out;
3662         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3663         status = -EIO;
3664         /* Ignore borken servers that return unrequested attrs */
3665         if (unlikely(res == NULL))
3666                 goto out;
3667         dprintk("%s: fsroot:\n", __func__);
3668         status = decode_pathname(xdr, &res->fs_path);
3669         if (unlikely(status != 0))
3670                 goto out;
3671         p = xdr_inline_decode(xdr, 4);
3672         if (unlikely(!p))
3673                 goto out_eio;
3674         n = be32_to_cpup(p);
3675         if (n <= 0)
3676                 goto out_eio;
3677         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3678                 u32 m;
3679                 struct nfs4_fs_location *loc;
3680
3681                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3682                         break;
3683                 loc = &res->locations[res->nlocations];
3684                 p = xdr_inline_decode(xdr, 4);
3685                 if (unlikely(!p))
3686                         goto out_eio;
3687                 m = be32_to_cpup(p);
3688
3689                 dprintk("%s: servers:\n", __func__);
3690                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3691                         struct nfs4_string *server;
3692
3693                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3694                                 unsigned int i;
3695                                 dprintk("%s: using first %u of %u servers "
3696                                         "returned for location %u\n",
3697                                                 __func__,
3698                                                 NFS4_FS_LOCATION_MAXSERVERS,
3699                                                 m, res->nlocations);
3700                                 for (i = loc->nservers; i < m; i++) {
3701                                         unsigned int len;
3702                                         char *data;
3703                                         status = decode_opaque_inline(xdr, &len, &data);
3704                                         if (unlikely(status != 0))
3705                                                 goto out_eio;
3706                                 }
3707                                 break;
3708                         }
3709                         server = &loc->servers[loc->nservers];
3710                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3711                         if (unlikely(status != 0))
3712                                 goto out_eio;
3713                         dprintk("%s ", server->data);
3714                 }
3715                 status = decode_pathname(xdr, &loc->rootpath);
3716                 if (unlikely(status != 0))
3717                         goto out_eio;
3718         }
3719         if (res->nlocations != 0)
3720                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3721 out:
3722         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3723         return status;
3724 out_eio:
3725         status = -EIO;
3726         goto out;
3727 }
3728
3729 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3730 {
3731         __be32 *p;
3732         int status = 0;
3733
3734         *res = 0;
3735         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3736                 return -EIO;
3737         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3738                 p = xdr_inline_decode(xdr, 8);
3739                 if (unlikely(!p))
3740                         return -EIO;
3741                 xdr_decode_hyper(p, res);
3742                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3743         }
3744         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3745         return status;
3746 }
3747
3748 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3749 {
3750         __be32 *p;
3751         int status = 0;
3752
3753         *maxlink = 1;
3754         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3755                 return -EIO;
3756         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3757                 p = xdr_inline_decode(xdr, 4);
3758                 if (unlikely(!p))
3759                         return -EIO;
3760                 *maxlink = be32_to_cpup(p);
3761                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3762         }
3763         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3764         return status;
3765 }
3766
3767 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3768 {
3769         __be32 *p;
3770         int status = 0;
3771
3772         *maxname = 1024;
3773         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3774                 return -EIO;
3775         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3776                 p = xdr_inline_decode(xdr, 4);
3777                 if (unlikely(!p))
3778                         return -EIO;
3779                 *maxname = be32_to_cpup(p);
3780                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3781         }
3782         dprintk("%s: maxname=%u\n", __func__, *maxname);
3783         return status;
3784 }
3785
3786 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3787 {
3788         __be32 *p;
3789         int status = 0;
3790
3791         *res = 1024;
3792         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3793                 return -EIO;
3794         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3795                 uint64_t maxread;
3796                 p = xdr_inline_decode(xdr, 8);
3797                 if (unlikely(!p))
3798                         return -EIO;
3799                 xdr_decode_hyper(p, &maxread);
3800                 if (maxread > 0x7FFFFFFF)
3801                         maxread = 0x7FFFFFFF;
3802                 *res = (uint32_t)maxread;
3803                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3804         }
3805         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3806         return status;
3807 }
3808
3809 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3810 {
3811         __be32 *p;
3812         int status = 0;
3813
3814         *res = 1024;
3815         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3816                 return -EIO;
3817         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3818                 uint64_t maxwrite;
3819                 p = xdr_inline_decode(xdr, 8);
3820                 if (unlikely(!p))
3821                         return -EIO;
3822                 xdr_decode_hyper(p, &maxwrite);
3823                 if (maxwrite > 0x7FFFFFFF)
3824                         maxwrite = 0x7FFFFFFF;
3825                 *res = (uint32_t)maxwrite;
3826                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3827         }
3828         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3829         return status;
3830 }
3831
3832 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3833 {
3834         uint32_t tmp;
3835         __be32 *p;
3836         int ret = 0;
3837
3838         *mode = 0;
3839         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3840                 return -EIO;
3841         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3842                 p = xdr_inline_decode(xdr, 4);
3843                 if (unlikely(!p))
3844                         return -EIO;
3845                 tmp = be32_to_cpup(p);
3846                 *mode = tmp & ~S_IFMT;
3847                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3848                 ret = NFS_ATTR_FATTR_MODE;
3849         }
3850         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3851         return ret;
3852 }
3853
3854 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3855 {
3856         __be32 *p;
3857         int ret = 0;
3858
3859         *nlink = 1;
3860         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3861                 return -EIO;
3862         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3863                 p = xdr_inline_decode(xdr, 4);
3864                 if (unlikely(!p))
3865                         return -EIO;
3866                 *nlink = be32_to_cpup(p);
3867                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3868                 ret = NFS_ATTR_FATTR_NLINK;
3869         }
3870         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3871         return ret;
3872 }
3873
3874 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3875                 struct nfs4_string *name, gfp_t gfp_flags)
3876 {
3877         ssize_t ret;
3878
3879         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3880                         XDR_MAX_NETOBJ, gfp_flags);
3881         name->len = 0;
3882         if (ret > 0)
3883                 name->len = ret;
3884         return ret;
3885 }
3886
3887 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3888                 const struct nfs_server *server, kuid_t *uid,
3889                 struct nfs4_string *owner_name)
3890 {
3891         ssize_t len;
3892         char *p;
3893
3894         *uid = make_kuid(&init_user_ns, -2);
3895         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3896                 return -EIO;
3897         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3898                 return 0;
3899         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3900
3901         if (owner_name != NULL) {
3902                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3903                 if (len <= 0)
3904                         goto out;
3905                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3906                 return NFS_ATTR_FATTR_OWNER_NAME;
3907         } else {
3908                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3909                                 XDR_MAX_NETOBJ);
3910                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3911                         goto out;
3912                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3913                 return NFS_ATTR_FATTR_OWNER;
3914         }
3915 out:
3916         if (len == -EBADMSG)
3917                 return -EIO;
3918         return 0;
3919 }
3920
3921 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3922                 const struct nfs_server *server, kgid_t *gid,
3923                 struct nfs4_string *group_name)
3924 {
3925         ssize_t len;
3926         char *p;
3927
3928         *gid = make_kgid(&init_user_ns, -2);
3929         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3930                 return -EIO;
3931         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3932                 return 0;
3933         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3934
3935         if (group_name != NULL) {
3936                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3937                 if (len <= 0)
3938                         goto out;
3939                 dprintk("%s: name=%s\n", __func__, group_name->data);
3940                 return NFS_ATTR_FATTR_GROUP_NAME;
3941         } else {
3942                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3943                                 XDR_MAX_NETOBJ);
3944                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3945                         goto out;
3946                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3947                 return NFS_ATTR_FATTR_GROUP;
3948         }
3949 out:
3950         if (len == -EBADMSG)
3951                 return -EIO;
3952         return 0;
3953 }
3954
3955 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3956 {
3957         uint32_t major = 0, minor = 0;
3958         __be32 *p;
3959         int ret = 0;
3960
3961         *rdev = MKDEV(0,0);
3962         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3963                 return -EIO;
3964         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3965                 dev_t tmp;
3966
3967                 p = xdr_inline_decode(xdr, 8);
3968                 if (unlikely(!p))
3969                         return -EIO;
3970                 major = be32_to_cpup(p++);
3971                 minor = be32_to_cpup(p);
3972                 tmp = MKDEV(major, minor);
3973                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3974                         *rdev = tmp;
3975                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3976                 ret = NFS_ATTR_FATTR_RDEV;
3977         }
3978         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3979         return ret;
3980 }
3981
3982 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3983 {
3984         __be32 *p;
3985         int status = 0;
3986
3987         *res = 0;
3988         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3989                 return -EIO;
3990         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3991                 p = xdr_inline_decode(xdr, 8);
3992                 if (unlikely(!p))
3993                         return -EIO;
3994                 xdr_decode_hyper(p, res);
3995                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3996         }
3997         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3998         return status;
3999 }
4000
4001 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4002 {
4003         __be32 *p;
4004         int status = 0;
4005
4006         *res = 0;
4007         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4008                 return -EIO;
4009         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4010                 p = xdr_inline_decode(xdr, 8);
4011                 if (unlikely(!p))
4012                         return -EIO;
4013                 xdr_decode_hyper(p, res);
4014                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4015         }
4016         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4017         return status;
4018 }
4019
4020 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4021 {
4022         __be32 *p;
4023         int status = 0;
4024
4025         *res = 0;
4026         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4027                 return -EIO;
4028         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4029                 p = xdr_inline_decode(xdr, 8);
4030                 if (unlikely(!p))
4031                         return -EIO;
4032                 xdr_decode_hyper(p, res);
4033                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4034         }
4035         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4036         return status;
4037 }
4038
4039 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4040 {
4041         __be32 *p;
4042         int ret = 0;
4043
4044         *used = 0;
4045         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4046                 return -EIO;
4047         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4048                 p = xdr_inline_decode(xdr, 8);
4049                 if (unlikely(!p))
4050                         return -EIO;
4051                 xdr_decode_hyper(p, used);
4052                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4053                 ret = NFS_ATTR_FATTR_SPACE_USED;
4054         }
4055         dprintk("%s: space used=%Lu\n", __func__,
4056                         (unsigned long long)*used);
4057         return ret;
4058 }
4059
4060 static __be32 *
4061 xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4062 {
4063         __u64 sec;
4064
4065         p = xdr_decode_hyper(p, &sec);
4066         t-> tv_sec = (time_t)sec;
4067         t->tv_nsec = be32_to_cpup(p++);
4068         return p;
4069 }
4070
4071 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4072 {
4073         __be32 *p;
4074
4075         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4076         if (unlikely(!p))
4077                 return -EIO;
4078         xdr_decode_nfstime4(p, time);
4079         return 0;
4080 }
4081
4082 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4083 {
4084         int status = 0;
4085
4086         time->tv_sec = 0;
4087         time->tv_nsec = 0;
4088         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4089                 return -EIO;
4090         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4091                 status = decode_attr_time(xdr, time);
4092                 if (status == 0)
4093                         status = NFS_ATTR_FATTR_ATIME;
4094                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4095         }
4096         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4097         return status;
4098 }
4099
4100 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4101 {
4102         int status = 0;
4103
4104         time->tv_sec = 0;
4105         time->tv_nsec = 0;
4106         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4107                 return -EIO;
4108         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4109                 status = decode_attr_time(xdr, time);
4110                 if (status == 0)
4111                         status = NFS_ATTR_FATTR_CTIME;
4112                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4113         }
4114         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4115         return status;
4116 }
4117
4118 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4119                                   struct timespec *time)
4120 {
4121         int status = 0;
4122
4123         time->tv_sec = 0;
4124         time->tv_nsec = 0;
4125         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4126                 return -EIO;
4127         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4128                 status = decode_attr_time(xdr, time);
4129                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4130         }
4131         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4132                 (long)time->tv_nsec);
4133         return status;
4134 }
4135
4136 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4137                                         struct nfs4_label *label)
4138 {
4139         uint32_t pi = 0;
4140         uint32_t lfs = 0;
4141         __u32 len;
4142         __be32 *p;
4143         int status = 0;
4144
4145         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4146                 return -EIO;
4147         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4148                 p = xdr_inline_decode(xdr, 4);
4149                 if (unlikely(!p))
4150                         return -EIO;
4151                 lfs = be32_to_cpup(p++);
4152                 p = xdr_inline_decode(xdr, 4);
4153                 if (unlikely(!p))
4154                         return -EIO;
4155                 pi = be32_to_cpup(p++);
4156                 p = xdr_inline_decode(xdr, 4);
4157                 if (unlikely(!p))
4158                         return -EIO;
4159                 len = be32_to_cpup(p++);
4160                 p = xdr_inline_decode(xdr, len);
4161                 if (unlikely(!p))
4162                         return -EIO;
4163                 if (len < NFS4_MAXLABELLEN) {
4164                         if (label) {
4165                                 memcpy(label->label, p, len);
4166                                 label->len = len;
4167                                 label->pi = pi;
4168                                 label->lfs = lfs;
4169                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4170                         }
4171                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4172                 } else
4173                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4174                                         __func__, len);
4175         }
4176         if (label && label->label)
4177                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4178                         (char *)label->label, label->len, label->pi, label->lfs);
4179         return status;
4180 }
4181
4182 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4183 {
4184         int status = 0;
4185
4186         time->tv_sec = 0;
4187         time->tv_nsec = 0;
4188         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4189                 return -EIO;
4190         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4191                 status = decode_attr_time(xdr, time);
4192                 if (status == 0)
4193                         status = NFS_ATTR_FATTR_MTIME;
4194                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4195         }
4196         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4197         return status;
4198 }
4199
4200 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4201 {
4202         unsigned int attrwords = XDR_QUADLEN(attrlen);
4203         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4204
4205         if (unlikely(attrwords != nwords)) {
4206                 dprintk("%s: server returned incorrect attribute length: "
4207                         "%u %c %u\n",
4208                                 __func__,
4209                                 attrwords << 2,
4210                                 (attrwords < nwords) ? '<' : '>',
4211                                 nwords << 2);
4212                 return -EIO;
4213         }
4214         return 0;
4215 }
4216
4217 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4218 {
4219         __be32 *p;
4220
4221         p = xdr_inline_decode(xdr, 20);
4222         if (unlikely(!p))
4223                 return -EIO;
4224         cinfo->atomic = be32_to_cpup(p++);
4225         p = xdr_decode_hyper(p, &cinfo->before);
4226         xdr_decode_hyper(p, &cinfo->after);
4227         return 0;
4228 }
4229
4230 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4231 {
4232         __be32 *p;
4233         uint32_t supp, acc;
4234         int status;
4235
4236         status = decode_op_hdr(xdr, OP_ACCESS);
4237         if (status)
4238                 return status;
4239         p = xdr_inline_decode(xdr, 8);
4240         if (unlikely(!p))
4241                 return -EIO;
4242         supp = be32_to_cpup(p++);
4243         acc = be32_to_cpup(p);
4244         *supported = supp;
4245         *access = acc;
4246         return 0;
4247 }
4248
4249 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4250 {
4251         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4252         if (unlikely(ret < 0))
4253                 return -EIO;
4254         return 0;
4255 }
4256
4257 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4258 {
4259         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4260 }
4261
4262 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4263 {
4264         stateid->type = NFS4_OPEN_STATEID_TYPE;
4265         return decode_stateid(xdr, stateid);
4266 }
4267
4268 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4269 {
4270         stateid->type = NFS4_LOCK_STATEID_TYPE;
4271         return decode_stateid(xdr, stateid);
4272 }
4273
4274 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4275 {
4276         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4277         return decode_stateid(xdr, stateid);
4278 }
4279
4280 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4281 {
4282         nfs4_stateid dummy;
4283
4284         nfs4_stateid_copy(stateid, &invalid_stateid);
4285         return decode_stateid(xdr, &dummy);
4286 }
4287
4288 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4289 {
4290         int status;
4291
4292         status = decode_op_hdr(xdr, OP_CLOSE);
4293         if (status != -EIO)
4294                 nfs_increment_open_seqid(status, res->seqid);
4295         if (!status)
4296                 status = decode_invalid_stateid(xdr, &res->stateid);
4297         return status;
4298 }
4299
4300 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4301 {
4302         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4303 }
4304
4305 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4306 {
4307         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4308 }
4309
4310 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4311 {
4312         int status;
4313
4314         status = decode_op_hdr(xdr, OP_COMMIT);
4315         if (!status)
4316                 status = decode_write_verifier(xdr, &res->verf->verifier);
4317         return status;
4318 }
4319
4320 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4321 {
4322         __be32 *p;
4323         uint32_t bmlen;
4324         int status;
4325
4326         status = decode_op_hdr(xdr, OP_CREATE);
4327         if (status)
4328                 return status;
4329         if ((status = decode_change_info(xdr, cinfo)))
4330                 return status;
4331         p = xdr_inline_decode(xdr, 4);
4332         if (unlikely(!p))
4333                 return -EIO;
4334         bmlen = be32_to_cpup(p);
4335         p = xdr_inline_decode(xdr, bmlen << 2);
4336         if (likely(p))
4337                 return 0;
4338         return -EIO;
4339 }
4340
4341 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4342 {
4343         unsigned int savep;
4344         uint32_t attrlen, bitmap[3] = {0};
4345         int status;
4346
4347         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4348                 goto xdr_error;
4349         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4350                 goto xdr_error;
4351         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4352                 goto xdr_error;
4353         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4354                 goto xdr_error;
4355         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4356                                                  &res->fh_expire_type)) != 0)
4357                 goto xdr_error;
4358         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4359                 goto xdr_error;
4360         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4361                 goto xdr_error;
4362         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4363                 goto xdr_error;
4364         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4365                                 res->exclcreat_bitmask)) != 0)
4366                 goto xdr_error;
4367         status = verify_attr_len(xdr, savep, attrlen);
4368 xdr_error:
4369         dprintk("%s: xdr returned %d!\n", __func__, -status);
4370         return status;
4371 }
4372
4373 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4374 {
4375         unsigned int savep;
4376         uint32_t attrlen, bitmap[3] = {0};
4377         int status;
4378
4379         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4380                 goto xdr_error;
4381         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4382                 goto xdr_error;
4383         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4384                 goto xdr_error;
4385
4386         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4387                 goto xdr_error;
4388         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4389                 goto xdr_error;
4390         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4391                 goto xdr_error;
4392
4393         status = -EIO;
4394         if (unlikely(bitmap[0]))
4395                 goto xdr_error;
4396
4397         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4398                 goto xdr_error;
4399         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4400                 goto xdr_error;
4401         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4402                 goto xdr_error;
4403
4404         status = verify_attr_len(xdr, savep, attrlen);
4405 xdr_error:
4406         dprintk("%s: xdr returned %d!\n", __func__, -status);
4407         return status;
4408 }
4409
4410 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4411 {
4412         unsigned int savep;
4413         uint32_t attrlen, bitmap[3] = {0};
4414         int status;
4415
4416         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4417                 goto xdr_error;
4418         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4419                 goto xdr_error;
4420         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4421                 goto xdr_error;
4422
4423         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4424                 goto xdr_error;
4425         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4426                 goto xdr_error;
4427
4428         status = verify_attr_len(xdr, savep, attrlen);
4429 xdr_error:
4430         dprintk("%s: xdr returned %d!\n", __func__, -status);
4431         return status;
4432 }
4433
4434 static int decode_threshold_hint(struct xdr_stream *xdr,
4435                                   uint32_t *bitmap,
4436                                   uint64_t *res,
4437                                   uint32_t hint_bit)
4438 {
4439         __be32 *p;
4440
4441         *res = 0;
4442         if (likely(bitmap[0] & hint_bit)) {
4443                 p = xdr_inline_decode(xdr, 8);
4444                 if (unlikely(!p))
4445                         return -EIO;
4446                 xdr_decode_hyper(p, res);
4447         }
4448         return 0;
4449 }
4450
4451 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4452                                         struct nfs4_threshold *res)
4453 {
4454         __be32 *p;
4455         unsigned int savep;
4456         uint32_t bitmap[3] = {0,}, attrlen;
4457         int status;
4458
4459         /* layout type */
4460         p = xdr_inline_decode(xdr, 4);
4461         if (unlikely(!p))
4462                 return -EIO;
4463         res->l_type = be32_to_cpup(p);
4464
4465         /* thi_hintset bitmap */
4466         status = decode_attr_bitmap(xdr, bitmap);
4467         if (status < 0)
4468                 goto xdr_error;
4469
4470         /* thi_hintlist length */
4471         status = decode_attr_length(xdr, &attrlen, &savep);
4472         if (status < 0)
4473                 goto xdr_error;
4474         /* thi_hintlist */
4475         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4476         if (status < 0)
4477                 goto xdr_error;
4478         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4479         if (status < 0)
4480                 goto xdr_error;
4481         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4482                                        THRESHOLD_RD_IO);
4483         if (status < 0)
4484                 goto xdr_error;
4485         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4486                                        THRESHOLD_WR_IO);
4487         if (status < 0)
4488                 goto xdr_error;
4489
4490         status = verify_attr_len(xdr, savep, attrlen);
4491         res->bm = bitmap[0];
4492
4493         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4494                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4495                 res->wr_io_sz);
4496 xdr_error:
4497         dprintk("%s ret=%d!\n", __func__, status);
4498         return status;
4499 }
4500
4501 /*
4502  * Thresholds on pNFS direct I/O vrs MDS I/O
4503  */
4504 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4505                                     uint32_t *bitmap,
4506                                     struct nfs4_threshold *res)
4507 {
4508         __be32 *p;
4509         int status = 0;
4510         uint32_t num;
4511
4512         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4513                 return -EIO;
4514         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4515                 /* Did the server return an unrequested attribute? */
4516                 if (unlikely(res == NULL))
4517                         return -EREMOTEIO;
4518                 p = xdr_inline_decode(xdr, 4);
4519                 if (unlikely(!p))
4520                         return -EIO;
4521                 num = be32_to_cpup(p);
4522                 if (num == 0)
4523                         return 0;
4524                 if (num > 1)
4525                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4526                                 "drivers per filesystem not supported\n",
4527                                 __func__);
4528
4529                 status = decode_first_threshold_item4(xdr, res);
4530                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4531         }
4532         return status;
4533 }
4534
4535 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4536                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4537                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4538                 const struct nfs_server *server)
4539 {
4540         int status;
4541         umode_t fmode = 0;
4542         uint32_t type;
4543         int32_t err;
4544
4545         status = decode_attr_type(xdr, bitmap, &type);
4546         if (status < 0)
4547                 goto xdr_error;
4548         fattr->mode = 0;
4549         if (status != 0) {
4550                 fattr->mode |= nfs_type2fmt[type];
4551                 fattr->valid |= status;
4552         }
4553
4554         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4555         if (status < 0)
4556                 goto xdr_error;
4557         fattr->valid |= status;
4558
4559         status = decode_attr_size(xdr, bitmap, &fattr->size);
4560         if (status < 0)
4561                 goto xdr_error;
4562         fattr->valid |= status;
4563
4564         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4565         if (status < 0)
4566                 goto xdr_error;
4567         fattr->valid |= status;
4568
4569         err = 0;
4570         status = decode_attr_error(xdr, bitmap, &err);
4571         if (status < 0)
4572                 goto xdr_error;
4573
4574         status = decode_attr_filehandle(xdr, bitmap, fh);
4575         if (status < 0)
4576                 goto xdr_error;
4577
4578         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4579         if (status < 0)
4580                 goto xdr_error;
4581         fattr->valid |= status;
4582
4583         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4584         if (status < 0)
4585                 goto xdr_error;
4586         fattr->valid |= status;
4587
4588         status = -EIO;
4589         if (unlikely(bitmap[0]))
4590                 goto xdr_error;
4591
4592         status = decode_attr_mode(xdr, bitmap, &fmode);
4593         if (status < 0)
4594                 goto xdr_error;
4595         if (status != 0) {
4596                 fattr->mode |= fmode;
4597                 fattr->valid |= status;
4598         }
4599
4600         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4601         if (status < 0)
4602                 goto xdr_error;
4603         fattr->valid |= status;
4604
4605         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4606         if (status < 0)
4607                 goto xdr_error;
4608         fattr->valid |= status;
4609
4610         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4611         if (status < 0)
4612                 goto xdr_error;
4613         fattr->valid |= status;
4614
4615         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4616         if (status < 0)
4617                 goto xdr_error;
4618         fattr->valid |= status;
4619
4620         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4621         if (status < 0)
4622                 goto xdr_error;
4623         fattr->valid |= status;
4624
4625         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4626         if (status < 0)
4627                 goto xdr_error;
4628         fattr->valid |= status;
4629
4630         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4631         if (status < 0)
4632                 goto xdr_error;
4633         fattr->valid |= status;
4634
4635         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4636         if (status < 0)
4637                 goto xdr_error;
4638         fattr->valid |= status;
4639
4640         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4641         if (status < 0)
4642                 goto xdr_error;
4643         fattr->valid |= status;
4644
4645         status = -EIO;
4646         if (unlikely(bitmap[1]))
4647                 goto xdr_error;
4648
4649         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4650         if (status < 0)
4651                 goto xdr_error;
4652
4653         if (label) {
4654                 status = decode_attr_security_label(xdr, bitmap, label);
4655                 if (status < 0)
4656                         goto xdr_error;
4657                 fattr->valid |= status;
4658         }
4659
4660 xdr_error:
4661         dprintk("%s: xdr returned %d\n", __func__, -status);
4662         return status;
4663 }
4664
4665 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4666                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4667                 struct nfs4_label *label, const struct nfs_server *server)
4668 {
4669         unsigned int savep;
4670         uint32_t attrlen,
4671                  bitmap[3] = {0};
4672         int status;
4673
4674         status = decode_op_hdr(xdr, OP_GETATTR);
4675         if (status < 0)
4676                 goto xdr_error;
4677
4678         status = decode_attr_bitmap(xdr, bitmap);
4679         if (status < 0)
4680                 goto xdr_error;
4681
4682         status = decode_attr_length(xdr, &attrlen, &savep);
4683         if (status < 0)
4684                 goto xdr_error;
4685
4686         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4687                                         label, server);
4688         if (status < 0)
4689                 goto xdr_error;
4690
4691         status = verify_attr_len(xdr, savep, attrlen);
4692 xdr_error:
4693         dprintk("%s: xdr returned %d\n", __func__, -status);
4694         return status;
4695 }
4696
4697 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4698                 struct nfs4_label *label, const struct nfs_server *server)
4699 {
4700         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4701 }
4702
4703 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4704                 const struct nfs_server *server)
4705 {
4706         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4707 }
4708
4709 /*
4710  * Decode potentially multiple layout types.
4711  */
4712 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4713                                     struct nfs_fsinfo *fsinfo)
4714 {
4715         __be32 *p;
4716         uint32_t i;
4717
4718         p = xdr_inline_decode(xdr, 4);
4719         if (unlikely(!p))
4720                 return -EIO;
4721         fsinfo->nlayouttypes = be32_to_cpup(p);
4722
4723         /* pNFS is not supported by the underlying file system */
4724         if (fsinfo->nlayouttypes == 0)
4725                 return 0;
4726
4727         /* Decode and set first layout type, move xdr->p past unused types */
4728         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4729         if (unlikely(!p))
4730                 return -EIO;
4731
4732         /* If we get too many, then just cap it at the max */
4733         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4734                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4735                         __func__, fsinfo->nlayouttypes);
4736                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4737         }
4738
4739         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4740                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4741         return 0;
4742 }
4743
4744 /*
4745  * The type of file system exported.
4746  * Note we must ensure that layouttype is set in any non-error case.
4747  */
4748 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4749                                 struct nfs_fsinfo *fsinfo)
4750 {
4751         int status = 0;
4752
4753         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4754         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4755                 return -EIO;
4756         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4757                 status = decode_pnfs_layout_types(xdr, fsinfo);
4758                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4759         }
4760         return status;
4761 }
4762
4763 /*
4764  * The prefered block size for layout directed io
4765  */
4766 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4767                                       uint32_t *res)
4768 {
4769         __be32 *p;
4770
4771         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4772         *res = 0;
4773         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4774                 p = xdr_inline_decode(xdr, 4);
4775                 if (unlikely(!p))
4776                         return -EIO;
4777                 *res = be32_to_cpup(p);
4778                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4779         }
4780         return 0;
4781 }
4782
4783 /*
4784  * The granularity of a CLONE operation.
4785  */
4786 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4787                                      uint32_t *res)
4788 {
4789         __be32 *p;
4790
4791         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4792         *res = 0;
4793         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4794                 p = xdr_inline_decode(xdr, 4);
4795                 if (unlikely(!p))
4796                         return -EIO;
4797                 *res = be32_to_cpup(p);
4798                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4799         }
4800         return 0;
4801 }
4802
4803 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4804 {
4805         unsigned int savep;
4806         uint32_t attrlen, bitmap[3];
4807         int status;
4808
4809         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4810                 goto xdr_error;
4811         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4812                 goto xdr_error;
4813         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4814                 goto xdr_error;
4815
4816         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4817
4818         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4819                 goto xdr_error;
4820         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4821                 goto xdr_error;
4822         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4823                 goto xdr_error;
4824         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4825         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4826                 goto xdr_error;
4827         fsinfo->wtpref = fsinfo->wtmax;
4828
4829         status = -EIO;
4830         if (unlikely(bitmap[0]))
4831                 goto xdr_error;
4832
4833         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4834         if (status != 0)
4835                 goto xdr_error;
4836         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4837         if (status != 0)
4838                 goto xdr_error;
4839
4840         status = -EIO;
4841         if (unlikely(bitmap[1]))
4842                 goto xdr_error;
4843
4844         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4845         if (status)
4846                 goto xdr_error;
4847         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4848         if (status)
4849                 goto xdr_error;
4850
4851         status = verify_attr_len(xdr, savep, attrlen);
4852 xdr_error:
4853         dprintk("%s: xdr returned %d!\n", __func__, -status);
4854         return status;
4855 }
4856
4857 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4858 {
4859         __be32 *p;
4860         uint32_t len;
4861         int status;
4862
4863         /* Zero handle first to allow comparisons */
4864         memset(fh, 0, sizeof(*fh));
4865
4866         status = decode_op_hdr(xdr, OP_GETFH);
4867         if (status)
4868                 return status;
4869
4870         p = xdr_inline_decode(xdr, 4);
4871         if (unlikely(!p))
4872                 return -EIO;
4873         len = be32_to_cpup(p);
4874         if (len > NFS4_FHSIZE)
4875                 return -EIO;
4876         fh->size = len;
4877         p = xdr_inline_decode(xdr, len);
4878         if (unlikely(!p))
4879                 return -EIO;
4880         memcpy(fh->data, p, len);
4881         return 0;
4882 }
4883
4884 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4885 {
4886         int status;
4887
4888         status = decode_op_hdr(xdr, OP_LINK);
4889         if (status)
4890                 return status;
4891         return decode_change_info(xdr, cinfo);
4892 }
4893
4894 /*
4895  * We create the owner, so we know a proper owner.id length is 4.
4896  */
4897 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4898 {
4899         uint64_t offset, length, clientid;
4900         __be32 *p;
4901         uint32_t namelen, type;
4902
4903         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4904         if (unlikely(!p))
4905                 return -EIO;
4906         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4907         p = xdr_decode_hyper(p, &length);
4908         type = be32_to_cpup(p++); /* 4 byte read */
4909         if (fl != NULL) { /* manipulate file lock */
4910                 fl->fl_start = (loff_t)offset;
4911                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4912                 if (length == ~(uint64_t)0)
4913                         fl->fl_end = OFFSET_MAX;
4914                 fl->fl_type = F_WRLCK;
4915                 if (type & 1)
4916                         fl->fl_type = F_RDLCK;
4917                 fl->fl_pid = 0;
4918         }
4919         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4920         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4921         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4922         if (likely(!p))
4923                 return -EIO;
4924         return -NFS4ERR_DENIED;
4925 }
4926
4927 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4928 {
4929         int status;
4930
4931         status = decode_op_hdr(xdr, OP_LOCK);
4932         if (status == -EIO)
4933                 goto out;
4934         if (status == 0) {
4935                 status = decode_lock_stateid(xdr, &res->stateid);
4936                 if (unlikely(status))
4937                         goto out;
4938         } else if (status == -NFS4ERR_DENIED)
4939                 status = decode_lock_denied(xdr, NULL);
4940         if (res->open_seqid != NULL)
4941                 nfs_increment_open_seqid(status, res->open_seqid);
4942         nfs_increment_lock_seqid(status, res->lock_seqid);
4943 out:
4944         return status;
4945 }
4946
4947 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4948 {
4949         int status;
4950         status = decode_op_hdr(xdr, OP_LOCKT);
4951         if (status == -NFS4ERR_DENIED)
4952                 return decode_lock_denied(xdr, res->denied);
4953         return status;
4954 }
4955
4956 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4957 {
4958         int status;
4959
4960         status = decode_op_hdr(xdr, OP_LOCKU);
4961         if (status != -EIO)
4962                 nfs_increment_lock_seqid(status, res->seqid);
4963         if (status == 0)
4964                 status = decode_lock_stateid(xdr, &res->stateid);
4965         return status;
4966 }
4967
4968 static int decode_release_lockowner(struct xdr_stream *xdr)
4969 {
4970         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4971 }
4972
4973 static int decode_lookup(struct xdr_stream *xdr)
4974 {
4975         return decode_op_hdr(xdr, OP_LOOKUP);
4976 }
4977
4978 static int decode_lookupp(struct xdr_stream *xdr)
4979 {
4980         return decode_op_hdr(xdr, OP_LOOKUPP);
4981 }
4982
4983 /* This is too sick! */
4984 static int decode_space_limit(struct xdr_stream *xdr,
4985                 unsigned long *pagemod_limit)
4986 {
4987         __be32 *p;
4988         uint32_t limit_type, nblocks, blocksize;
4989         u64 maxsize = 0;
4990
4991         p = xdr_inline_decode(xdr, 12);
4992         if (unlikely(!p))
4993                 return -EIO;
4994         limit_type = be32_to_cpup(p++);
4995         switch (limit_type) {
4996         case NFS4_LIMIT_SIZE:
4997                 xdr_decode_hyper(p, &maxsize);
4998                 break;
4999         case NFS4_LIMIT_BLOCKS:
5000                 nblocks = be32_to_cpup(p++);
5001                 blocksize = be32_to_cpup(p);
5002                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5003         }
5004         maxsize >>= PAGE_SHIFT;
5005         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5006         return 0;
5007 }
5008
5009 static int decode_rw_delegation(struct xdr_stream *xdr,
5010                 uint32_t delegation_type,
5011                 struct nfs_openres *res)
5012 {
5013         __be32 *p;
5014         int status;
5015
5016         status = decode_delegation_stateid(xdr, &res->delegation);
5017         if (unlikely(status))
5018                 return status;
5019         p = xdr_inline_decode(xdr, 4);
5020         if (unlikely(!p))
5021                 return -EIO;
5022         res->do_recall = be32_to_cpup(p);
5023
5024         switch (delegation_type) {
5025         case NFS4_OPEN_DELEGATE_READ:
5026                 res->delegation_type = FMODE_READ;
5027                 break;
5028         case NFS4_OPEN_DELEGATE_WRITE:
5029                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5030                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5031                                 return -EIO;
5032         }
5033         return decode_ace(xdr, NULL);
5034 }
5035
5036 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5037 {
5038         __be32 *p;
5039         uint32_t why_no_delegation;
5040
5041         p = xdr_inline_decode(xdr, 4);
5042         if (unlikely(!p))
5043                 return -EIO;
5044         why_no_delegation = be32_to_cpup(p);
5045         switch (why_no_delegation) {
5046                 case WND4_CONTENTION:
5047                 case WND4_RESOURCE:
5048                         xdr_inline_decode(xdr, 4);
5049                         /* Ignore for now */
5050         }
5051         return 0;
5052 }
5053
5054 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5055 {
5056         __be32 *p;
5057         uint32_t delegation_type;
5058
5059         p = xdr_inline_decode(xdr, 4);
5060         if (unlikely(!p))
5061                 return -EIO;
5062         delegation_type = be32_to_cpup(p);
5063         res->delegation_type = 0;
5064         switch (delegation_type) {
5065         case NFS4_OPEN_DELEGATE_NONE:
5066                 return 0;
5067         case NFS4_OPEN_DELEGATE_READ:
5068         case NFS4_OPEN_DELEGATE_WRITE:
5069                 return decode_rw_delegation(xdr, delegation_type, res);
5070         case NFS4_OPEN_DELEGATE_NONE_EXT:
5071                 return decode_no_delegation(xdr, res);
5072         }
5073         return -EIO;
5074 }
5075
5076 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5077 {
5078         __be32 *p;
5079         uint32_t savewords, bmlen, i;
5080         int status;
5081
5082         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5083                 return status;
5084         nfs_increment_open_seqid(status, res->seqid);
5085         if (status)
5086                 return status;
5087         status = decode_open_stateid(xdr, &res->stateid);
5088         if (unlikely(status))
5089                 return status;
5090
5091         decode_change_info(xdr, &res->cinfo);
5092
5093         p = xdr_inline_decode(xdr, 8);
5094         if (unlikely(!p))
5095                 return -EIO;
5096         res->rflags = be32_to_cpup(p++);
5097         bmlen = be32_to_cpup(p);
5098         if (bmlen > 10)
5099                 goto xdr_error;
5100
5101         p = xdr_inline_decode(xdr, bmlen << 2);
5102         if (unlikely(!p))
5103                 return -EIO;
5104         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5105         for (i = 0; i < savewords; ++i)
5106                 res->attrset[i] = be32_to_cpup(p++);
5107         for (; i < NFS4_BITMAP_SIZE; i++)
5108                 res->attrset[i] = 0;
5109
5110         return decode_delegation(xdr, res);
5111 xdr_error:
5112         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5113         return -EIO;
5114 }
5115
5116 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5117 {
5118         int status;
5119
5120         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5121         if (status != -EIO)
5122                 nfs_increment_open_seqid(status, res->seqid);
5123         if (!status)
5124                 status = decode_open_stateid(xdr, &res->stateid);
5125         return status;
5126 }
5127
5128 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5129 {
5130         int status;
5131
5132         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5133         if (status != -EIO)
5134                 nfs_increment_open_seqid(status, res->seqid);
5135         if (!status)
5136                 status = decode_open_stateid(xdr, &res->stateid);
5137         return status;
5138 }
5139
5140 static int decode_putfh(struct xdr_stream *xdr)
5141 {
5142         return decode_op_hdr(xdr, OP_PUTFH);
5143 }
5144
5145 static int decode_putrootfh(struct xdr_stream *xdr)
5146 {
5147         return decode_op_hdr(xdr, OP_PUTROOTFH);
5148 }
5149
5150 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5151                        struct nfs_pgio_res *res)
5152 {
5153         __be32 *p;
5154         uint32_t count, eof, recvd;
5155         int status;
5156
5157         status = decode_op_hdr(xdr, OP_READ);
5158         if (status)
5159                 return status;
5160         p = xdr_inline_decode(xdr, 8);
5161         if (unlikely(!p))
5162                 return -EIO;
5163         eof = be32_to_cpup(p++);
5164         count = be32_to_cpup(p);
5165         recvd = xdr_read_pages(xdr, count);
5166         if (count > recvd) {
5167                 dprintk("NFS: server cheating in read reply: "
5168                                 "count %u > recvd %u\n", count, recvd);
5169                 count = recvd;
5170                 eof = 0;
5171         }
5172         res->eof = eof;
5173         res->count = count;
5174         return 0;
5175 }
5176
5177 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5178 {
5179         int             status;
5180         __be32          verf[2];
5181
5182         status = decode_op_hdr(xdr, OP_READDIR);
5183         if (!status)
5184                 status = decode_verifier(xdr, readdir->verifier.data);
5185         if (unlikely(status))
5186                 return status;
5187         memcpy(verf, readdir->verifier.data, sizeof(verf));
5188         dprintk("%s: verifier = %08x:%08x\n",
5189                         __func__, verf[0], verf[1]);
5190         return xdr_read_pages(xdr, xdr->buf->page_len);
5191 }
5192
5193 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5194 {
5195         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5196         u32 len, recvd;
5197         __be32 *p;
5198         int status;
5199
5200         status = decode_op_hdr(xdr, OP_READLINK);
5201         if (status)
5202                 return status;
5203
5204         /* Convert length of symlink */
5205         p = xdr_inline_decode(xdr, 4);
5206         if (unlikely(!p))
5207                 return -EIO;
5208         len = be32_to_cpup(p);
5209         if (len >= rcvbuf->page_len || len <= 0) {
5210                 dprintk("nfs: server returned giant symlink!\n");
5211                 return -ENAMETOOLONG;
5212         }
5213         recvd = xdr_read_pages(xdr, len);
5214         if (recvd < len) {
5215                 dprintk("NFS: server cheating in readlink reply: "
5216                                 "count %u > recvd %u\n", len, recvd);
5217                 return -EIO;
5218         }
5219         /*
5220          * The XDR encode routine has set things up so that
5221          * the link text will be copied directly into the
5222          * buffer.  We just have to do overflow-checking,
5223          * and and null-terminate the text (the VFS expects
5224          * null-termination).
5225          */
5226         xdr_terminate_string(rcvbuf, len);
5227         return 0;
5228 }
5229
5230 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5231 {
5232         int status;
5233
5234         status = decode_op_hdr(xdr, OP_REMOVE);
5235         if (status)
5236                 goto out;
5237         status = decode_change_info(xdr, cinfo);
5238 out:
5239         return status;
5240 }
5241
5242 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5243               struct nfs4_change_info *new_cinfo)
5244 {
5245         int status;
5246
5247         status = decode_op_hdr(xdr, OP_RENAME);
5248         if (status)
5249                 goto out;
5250         if ((status = decode_change_info(xdr, old_cinfo)))
5251                 goto out;
5252         status = decode_change_info(xdr, new_cinfo);
5253 out:
5254         return status;
5255 }
5256
5257 static int decode_renew(struct xdr_stream *xdr)
5258 {
5259         return decode_op_hdr(xdr, OP_RENEW);
5260 }
5261
5262 static int
5263 decode_restorefh(struct xdr_stream *xdr)
5264 {
5265         return decode_op_hdr(xdr, OP_RESTOREFH);
5266 }
5267
5268 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5269                          struct nfs_getaclres *res)
5270 {
5271         unsigned int savep;
5272         uint32_t attrlen,
5273                  bitmap[3] = {0};
5274         int status;
5275         unsigned int pg_offset;
5276
5277         res->acl_len = 0;
5278         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5279                 goto out;
5280
5281         xdr_enter_page(xdr, xdr->buf->page_len);
5282
5283         /* Calculate the offset of the page data */
5284         pg_offset = xdr->buf->head[0].iov_len;
5285
5286         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5287                 goto out;
5288         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5289                 goto out;
5290
5291         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5292                 return -EIO;
5293         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5294
5295                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5296                  * are stored with the acl data to handle the problem of
5297                  * variable length bitmaps.*/
5298                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5299                 res->acl_len = attrlen;
5300
5301                 /* Check for receive buffer overflow */
5302                 if (res->acl_len > (xdr->nwords << 2) ||
5303                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5304                         res->acl_flags |= NFS4_ACL_TRUNC;
5305                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5306                                         attrlen, xdr->nwords << 2);
5307                 }
5308         } else
5309                 status = -EOPNOTSUPP;
5310
5311 out:
5312         return status;
5313 }
5314
5315 static int
5316 decode_savefh(struct xdr_stream *xdr)
5317 {
5318         return decode_op_hdr(xdr, OP_SAVEFH);
5319 }
5320
5321 static int decode_setattr(struct xdr_stream *xdr)
5322 {
5323         int status;
5324
5325         status = decode_op_hdr(xdr, OP_SETATTR);
5326         if (status)
5327                 return status;
5328         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5329                 return 0;
5330         return -EIO;
5331 }
5332
5333 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5334 {
5335         __be32 *p;
5336         uint32_t opnum;
5337         int32_t nfserr;
5338
5339         p = xdr_inline_decode(xdr, 8);
5340         if (unlikely(!p))
5341                 return -EIO;
5342         opnum = be32_to_cpup(p++);
5343         if (opnum != OP_SETCLIENTID) {
5344                 dprintk("nfs: decode_setclientid: Server returned operation"
5345                         " %d\n", opnum);
5346                 return -EIO;
5347         }
5348         nfserr = be32_to_cpup(p);
5349         if (nfserr == NFS_OK) {
5350                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5351                 if (unlikely(!p))
5352                         return -EIO;
5353                 p = xdr_decode_hyper(p, &res->clientid);
5354                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5355         } else if (nfserr == NFSERR_CLID_INUSE) {
5356                 uint32_t len;
5357
5358                 /* skip netid string */
5359                 p = xdr_inline_decode(xdr, 4);
5360                 if (unlikely(!p))
5361                         return -EIO;
5362                 len = be32_to_cpup(p);
5363                 p = xdr_inline_decode(xdr, len);
5364                 if (unlikely(!p))
5365                         return -EIO;
5366
5367                 /* skip uaddr string */
5368                 p = xdr_inline_decode(xdr, 4);
5369                 if (unlikely(!p))
5370                         return -EIO;
5371                 len = be32_to_cpup(p);
5372                 p = xdr_inline_decode(xdr, len);
5373                 if (unlikely(!p))
5374                         return -EIO;
5375                 return -NFSERR_CLID_INUSE;
5376         } else
5377                 return nfs4_stat_to_errno(nfserr);
5378
5379         return 0;
5380 }
5381
5382 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5383 {
5384         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5385 }
5386
5387 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5388 {
5389         __be32 *p;
5390         int status;
5391
5392         status = decode_op_hdr(xdr, OP_WRITE);
5393         if (status)
5394                 return status;
5395
5396         p = xdr_inline_decode(xdr, 8);
5397         if (unlikely(!p))
5398                 return -EIO;
5399         res->count = be32_to_cpup(p++);
5400         res->verf->committed = be32_to_cpup(p++);
5401         return decode_write_verifier(xdr, &res->verf->verifier);
5402 }
5403
5404 static int decode_delegreturn(struct xdr_stream *xdr)
5405 {
5406         return decode_op_hdr(xdr, OP_DELEGRETURN);
5407 }
5408
5409 static int decode_secinfo_gss(struct xdr_stream *xdr,
5410                               struct nfs4_secinfo4 *flavor)
5411 {
5412         u32 oid_len;
5413         __be32 *p;
5414
5415         p = xdr_inline_decode(xdr, 4);
5416         if (unlikely(!p))
5417                 return -EIO;
5418         oid_len = be32_to_cpup(p);
5419         if (oid_len > GSS_OID_MAX_LEN)
5420                 return -EINVAL;
5421
5422         p = xdr_inline_decode(xdr, oid_len);
5423         if (unlikely(!p))
5424                 return -EIO;
5425         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5426         flavor->flavor_info.oid.len = oid_len;
5427
5428         p = xdr_inline_decode(xdr, 8);
5429         if (unlikely(!p))
5430                 return -EIO;
5431         flavor->flavor_info.qop = be32_to_cpup(p++);
5432         flavor->flavor_info.service = be32_to_cpup(p);
5433
5434         return 0;
5435 }
5436
5437 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5438 {
5439         struct nfs4_secinfo4 *sec_flavor;
5440         unsigned int i, num_flavors;
5441         int status;
5442         __be32 *p;
5443
5444         p = xdr_inline_decode(xdr, 4);
5445         if (unlikely(!p))
5446                 return -EIO;
5447
5448         res->flavors->num_flavors = 0;
5449         num_flavors = be32_to_cpup(p);
5450
5451         for (i = 0; i < num_flavors; i++) {
5452                 sec_flavor = &res->flavors->flavors[i];
5453                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5454                         break;
5455
5456                 p = xdr_inline_decode(xdr, 4);
5457                 if (unlikely(!p))
5458                         return -EIO;
5459                 sec_flavor->flavor = be32_to_cpup(p);
5460
5461                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5462                         status = decode_secinfo_gss(xdr, sec_flavor);
5463                         if (status)
5464                                 goto out;
5465                 }
5466                 res->flavors->num_flavors++;
5467         }
5468
5469         status = 0;
5470 out:
5471         return status;
5472 }
5473
5474 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5475 {
5476         int status = decode_op_hdr(xdr, OP_SECINFO);
5477         if (status)
5478                 return status;
5479         return decode_secinfo_common(xdr, res);
5480 }
5481
5482 #if defined(CONFIG_NFS_V4_1)
5483 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5484 {
5485         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5486         if (status)
5487                 return status;
5488         return decode_secinfo_common(xdr, res);
5489 }
5490
5491 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5492 {
5493         __be32 *p;
5494         uint32_t bitmap_words;
5495         unsigned int i;
5496
5497         p = xdr_inline_decode(xdr, 4);
5498         if (!p)
5499                 return -EIO;
5500         bitmap_words = be32_to_cpup(p++);
5501         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5502                 return -EIO;
5503         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5504         for (i = 0; i < bitmap_words; i++)
5505                 op_map->u.words[i] = be32_to_cpup(p++);
5506
5507         return 0;
5508 }
5509
5510 static int decode_exchange_id(struct xdr_stream *xdr,
5511                               struct nfs41_exchange_id_res *res)
5512 {
5513         __be32 *p;
5514         uint32_t dummy;
5515         char *dummy_str;
5516         int status;
5517         uint32_t impl_id_count;
5518
5519         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5520         if (status)
5521                 return status;
5522
5523         p = xdr_inline_decode(xdr, 8);
5524         if (unlikely(!p))
5525                 return -EIO;
5526         xdr_decode_hyper(p, &res->clientid);
5527         p = xdr_inline_decode(xdr, 12);
5528         if (unlikely(!p))
5529                 return -EIO;
5530         res->seqid = be32_to_cpup(p++);
5531         res->flags = be32_to_cpup(p++);
5532
5533         res->state_protect.how = be32_to_cpup(p);
5534         switch (res->state_protect.how) {
5535         case SP4_NONE:
5536                 break;
5537         case SP4_MACH_CRED:
5538                 status = decode_op_map(xdr, &res->state_protect.enforce);
5539                 if (status)
5540                         return status;
5541                 status = decode_op_map(xdr, &res->state_protect.allow);
5542                 if (status)
5543                         return status;
5544                 break;
5545         default:
5546                 WARN_ON_ONCE(1);
5547                 return -EIO;
5548         }
5549
5550         /* server_owner4.so_minor_id */
5551         p = xdr_inline_decode(xdr, 8);
5552         if (unlikely(!p))
5553                 return -EIO;
5554         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5555
5556         /* server_owner4.so_major_id */
5557         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5558         if (unlikely(status))
5559                 return status;
5560         memcpy(res->server_owner->major_id, dummy_str, dummy);
5561         res->server_owner->major_id_sz = dummy;
5562
5563         /* server_scope4 */
5564         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5565         if (unlikely(status))
5566                 return status;
5567         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5568         res->server_scope->server_scope_sz = dummy;
5569
5570         /* Implementation Id */
5571         p = xdr_inline_decode(xdr, 4);
5572         if (unlikely(!p))
5573                 return -EIO;
5574         impl_id_count = be32_to_cpup(p++);
5575
5576         if (impl_id_count) {
5577                 /* nii_domain */
5578                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5579                 if (unlikely(status))
5580                         return status;
5581                 memcpy(res->impl_id->domain, dummy_str, dummy);
5582
5583                 /* nii_name */
5584                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5585                 if (unlikely(status))
5586                         return status;
5587                 memcpy(res->impl_id->name, dummy_str, dummy);
5588
5589                 /* nii_date */
5590                 p = xdr_inline_decode(xdr, 12);
5591                 if (unlikely(!p))
5592                         return -EIO;
5593                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5594                 res->impl_id->date.nseconds = be32_to_cpup(p);
5595
5596                 /* if there's more than one entry, ignore the rest */
5597         }
5598         return 0;
5599 }
5600
5601 static int decode_chan_attrs(struct xdr_stream *xdr,
5602                              struct nfs4_channel_attrs *attrs)
5603 {
5604         __be32 *p;
5605         u32 nr_attrs, val;
5606
5607         p = xdr_inline_decode(xdr, 28);
5608         if (unlikely(!p))
5609                 return -EIO;
5610         val = be32_to_cpup(p++);        /* headerpadsz */
5611         if (val)
5612                 return -EINVAL;         /* no support for header padding yet */
5613         attrs->max_rqst_sz = be32_to_cpup(p++);
5614         attrs->max_resp_sz = be32_to_cpup(p++);
5615         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5616         attrs->max_ops = be32_to_cpup(p++);
5617         attrs->max_reqs = be32_to_cpup(p++);
5618         nr_attrs = be32_to_cpup(p);
5619         if (unlikely(nr_attrs > 1)) {
5620                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5621                         "count %u\n", __func__, nr_attrs);
5622                 return -EINVAL;
5623         }
5624         if (nr_attrs == 1) {
5625                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5626                 if (unlikely(!p))
5627                         return -EIO;
5628         }
5629         return 0;
5630 }
5631
5632 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5633 {
5634         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5635 }
5636
5637 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5638                                 struct nfs41_bind_conn_to_session_res *res)
5639 {
5640         __be32 *p;
5641         int status;
5642
5643         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5644         if (!status)
5645                 status = decode_sessionid(xdr, &res->sessionid);
5646         if (unlikely(status))
5647                 return status;
5648
5649         /* dir flags, rdma mode bool */
5650         p = xdr_inline_decode(xdr, 8);
5651         if (unlikely(!p))
5652                 return -EIO;
5653
5654         res->dir = be32_to_cpup(p++);
5655         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5656                 return -EIO;
5657         if (be32_to_cpup(p) == 0)
5658                 res->use_conn_in_rdma_mode = false;
5659         else
5660                 res->use_conn_in_rdma_mode = true;
5661
5662         return 0;
5663 }
5664
5665 static int decode_create_session(struct xdr_stream *xdr,
5666                                  struct nfs41_create_session_res *res)
5667 {
5668         __be32 *p;
5669         int status;
5670
5671         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5672         if (!status)
5673                 status = decode_sessionid(xdr, &res->sessionid);
5674         if (unlikely(status))
5675                 return status;
5676
5677         /* seqid, flags */
5678         p = xdr_inline_decode(xdr, 8);
5679         if (unlikely(!p))
5680                 return -EIO;
5681         res->seqid = be32_to_cpup(p++);
5682         res->flags = be32_to_cpup(p);
5683
5684         /* Channel attributes */
5685         status = decode_chan_attrs(xdr, &res->fc_attrs);
5686         if (!status)
5687                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5688         return status;
5689 }
5690
5691 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5692 {
5693         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5694 }
5695
5696 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5697 {
5698         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5699 }
5700
5701 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5702 {
5703         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5704 }
5705 #endif /* CONFIG_NFS_V4_1 */
5706
5707 static int decode_sequence(struct xdr_stream *xdr,
5708                            struct nfs4_sequence_res *res,
5709                            struct rpc_rqst *rqstp)
5710 {
5711 #if defined(CONFIG_NFS_V4_1)
5712         struct nfs4_session *session;
5713         struct nfs4_sessionid id;
5714         u32 dummy;
5715         int status;
5716         __be32 *p;
5717
5718         if (res->sr_slot == NULL)
5719                 return 0;
5720         if (!res->sr_slot->table->session)
5721                 return 0;
5722
5723         status = decode_op_hdr(xdr, OP_SEQUENCE);
5724         if (!status)
5725                 status = decode_sessionid(xdr, &id);
5726         if (unlikely(status))
5727                 goto out_err;
5728
5729         /*
5730          * If the server returns different values for sessionID, slotID or
5731          * sequence number, the server is looney tunes.
5732          */
5733         status = -EREMOTEIO;
5734         session = res->sr_slot->table->session;
5735
5736         if (memcmp(id.data, session->sess_id.data,
5737                    NFS4_MAX_SESSIONID_LEN)) {
5738                 dprintk("%s Invalid session id\n", __func__);
5739                 goto out_err;
5740         }
5741
5742         p = xdr_inline_decode(xdr, 20);
5743         if (unlikely(!p))
5744                 goto out_overflow;
5745
5746         /* seqid */
5747         dummy = be32_to_cpup(p++);
5748         if (dummy != res->sr_slot->seq_nr) {
5749                 dprintk("%s Invalid sequence number\n", __func__);
5750                 goto out_err;
5751         }
5752         /* slot id */
5753         dummy = be32_to_cpup(p++);
5754         if (dummy != res->sr_slot->slot_nr) {
5755                 dprintk("%s Invalid slot id\n", __func__);
5756                 goto out_err;
5757         }
5758         /* highest slot id */
5759         res->sr_highest_slotid = be32_to_cpup(p++);
5760         /* target highest slot id */
5761         res->sr_target_highest_slotid = be32_to_cpup(p++);
5762         /* result flags */
5763         res->sr_status_flags = be32_to_cpup(p);
5764         status = 0;
5765 out_err:
5766         res->sr_status = status;
5767         return status;
5768 out_overflow:
5769         status = -EIO;
5770         goto out_err;
5771 #else  /* CONFIG_NFS_V4_1 */
5772         return 0;
5773 #endif /* CONFIG_NFS_V4_1 */
5774 }
5775
5776 #if defined(CONFIG_NFS_V4_1)
5777 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5778 {
5779         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5780         return decode_stateid(xdr, stateid);
5781 }
5782
5783 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5784                                 struct nfs4_getdeviceinfo_res *res)
5785 {
5786         struct pnfs_device *pdev = res->pdev;
5787         __be32 *p;
5788         uint32_t len, type;
5789         int status;
5790
5791         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5792         if (status) {
5793                 if (status == -ETOOSMALL) {
5794                         p = xdr_inline_decode(xdr, 4);
5795                         if (unlikely(!p))
5796                                 return -EIO;
5797                         pdev->mincount = be32_to_cpup(p);
5798                         dprintk("%s: Min count too small. mincnt = %u\n",
5799                                 __func__, pdev->mincount);
5800                 }
5801                 return status;
5802         }
5803
5804         p = xdr_inline_decode(xdr, 8);
5805         if (unlikely(!p))
5806                 return -EIO;
5807         type = be32_to_cpup(p++);
5808         if (type != pdev->layout_type) {
5809                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5810                         __func__, pdev->layout_type, type);
5811                 return -EINVAL;
5812         }
5813         /*
5814          * Get the length of the opaque device_addr4. xdr_read_pages places
5815          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5816          * and places the remaining xdr data in xdr_buf->tail
5817          */
5818         pdev->mincount = be32_to_cpup(p);
5819         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5820                 return -EIO;
5821
5822         /* Parse notification bitmap, verifying that it is zero. */
5823         p = xdr_inline_decode(xdr, 4);
5824         if (unlikely(!p))
5825                 return -EIO;
5826         len = be32_to_cpup(p);
5827         if (len) {
5828                 uint32_t i;
5829
5830                 p = xdr_inline_decode(xdr, 4 * len);
5831                 if (unlikely(!p))
5832                         return -EIO;
5833
5834                 res->notification = be32_to_cpup(p++);
5835                 for (i = 1; i < len; i++) {
5836                         if (be32_to_cpup(p++)) {
5837                                 dprintk("%s: unsupported notification\n",
5838                                         __func__);
5839                                 return -EIO;
5840                         }
5841                 }
5842         }
5843         return 0;
5844 }
5845
5846 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5847                             struct nfs4_layoutget_res *res)
5848 {
5849         __be32 *p;
5850         int status;
5851         u32 layout_count;
5852         u32 recvd;
5853
5854         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5855         if (status)
5856                 goto out;
5857         p = xdr_inline_decode(xdr, 4);
5858         if (unlikely(!p))
5859                 goto out_overflow;
5860         res->return_on_close = be32_to_cpup(p);
5861         decode_layout_stateid(xdr, &res->stateid);
5862         p = xdr_inline_decode(xdr, 4);
5863         if (unlikely(!p))
5864                 goto out_overflow;
5865         layout_count = be32_to_cpup(p);
5866         if (!layout_count) {
5867                 dprintk("%s: server responded with empty layout array\n",
5868                         __func__);
5869                 status = -EINVAL;
5870                 goto out;
5871         }
5872
5873         p = xdr_inline_decode(xdr, 28);
5874         if (unlikely(!p))
5875                 goto out_overflow;
5876         p = xdr_decode_hyper(p, &res->range.offset);
5877         p = xdr_decode_hyper(p, &res->range.length);
5878         res->range.iomode = be32_to_cpup(p++);
5879         res->type = be32_to_cpup(p++);
5880         res->layoutp->len = be32_to_cpup(p);
5881
5882         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5883                 __func__,
5884                 (unsigned long)res->range.offset,
5885                 (unsigned long)res->range.length,
5886                 res->range.iomode,
5887                 res->type,
5888                 res->layoutp->len);
5889
5890         recvd = xdr_read_pages(xdr, res->layoutp->len);
5891         if (res->layoutp->len > recvd) {
5892                 dprintk("NFS: server cheating in layoutget reply: "
5893                                 "layout len %u > recvd %u\n",
5894                                 res->layoutp->len, recvd);
5895                 status = -EINVAL;
5896                 goto out;
5897         }
5898
5899         if (layout_count > 1) {
5900                 /* We only handle a length one array at the moment.  Any
5901                  * further entries are just ignored.  Note that this means
5902                  * the client may see a response that is less than the
5903                  * minimum it requested.
5904                  */
5905                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5906                         __func__, layout_count);
5907         }
5908
5909 out:
5910         res->status = status;
5911         return status;
5912 out_overflow:
5913         status = -EIO;
5914         goto out;
5915 }
5916
5917 static int decode_layoutreturn(struct xdr_stream *xdr,
5918                                struct nfs4_layoutreturn_res *res)
5919 {
5920         __be32 *p;
5921         int status;
5922
5923         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5924         if (status)
5925                 return status;
5926         p = xdr_inline_decode(xdr, 4);
5927         if (unlikely(!p))
5928                 return -EIO;
5929         res->lrs_present = be32_to_cpup(p);
5930         if (res->lrs_present)
5931                 status = decode_layout_stateid(xdr, &res->stateid);
5932         else
5933                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5934         return status;
5935 }
5936
5937 static int decode_layoutcommit(struct xdr_stream *xdr,
5938                                struct rpc_rqst *req,
5939                                struct nfs4_layoutcommit_res *res)
5940 {
5941         __be32 *p;
5942         __u32 sizechanged;
5943         int status;
5944
5945         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5946         res->status = status;
5947         if (status)
5948                 return status;
5949
5950         p = xdr_inline_decode(xdr, 4);
5951         if (unlikely(!p))
5952                 return -EIO;
5953         sizechanged = be32_to_cpup(p);
5954
5955         if (sizechanged) {
5956                 /* throw away new size */
5957                 p = xdr_inline_decode(xdr, 8);
5958                 if (unlikely(!p))
5959                         return -EIO;
5960         }
5961         return 0;
5962 }
5963
5964 static int decode_test_stateid(struct xdr_stream *xdr,
5965                                struct nfs41_test_stateid_res *res)
5966 {
5967         __be32 *p;
5968         int status;
5969         int num_res;
5970
5971         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5972         if (status)
5973                 return status;
5974
5975         p = xdr_inline_decode(xdr, 4);
5976         if (unlikely(!p))
5977                 return -EIO;
5978         num_res = be32_to_cpup(p++);
5979         if (num_res != 1)
5980                 return -EIO;
5981
5982         p = xdr_inline_decode(xdr, 4);
5983         if (unlikely(!p))
5984                 return -EIO;
5985         res->status = be32_to_cpup(p++);
5986
5987         return status;
5988 }
5989
5990 static int decode_free_stateid(struct xdr_stream *xdr,
5991                                struct nfs41_free_stateid_res *res)
5992 {
5993         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5994         return res->status;
5995 }
5996 #else
5997 static inline
5998 int decode_layoutreturn(struct xdr_stream *xdr,
5999                                struct nfs4_layoutreturn_res *res)
6000 {
6001         return 0;
6002 }
6003
6004 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6005                             struct nfs4_layoutget_res *res)
6006 {
6007         return 0;
6008 }
6009
6010 #endif /* CONFIG_NFS_V4_1 */
6011
6012 /*
6013  * END OF "GENERIC" DECODE ROUTINES.
6014  */
6015
6016 /*
6017  * Decode OPEN_DOWNGRADE response
6018  */
6019 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6020                                        struct xdr_stream *xdr,
6021                                        void *data)
6022 {
6023         struct nfs_closeres *res = data;
6024         struct compound_hdr hdr;
6025         int status;
6026
6027         status = decode_compound_hdr(xdr, &hdr);
6028         if (status)
6029                 goto out;
6030         status = decode_sequence(xdr, &res->seq_res, rqstp);
6031         if (status)
6032                 goto out;
6033         status = decode_putfh(xdr);
6034         if (status)
6035                 goto out;
6036         if (res->lr_res) {
6037                 status = decode_layoutreturn(xdr, res->lr_res);
6038                 res->lr_ret = status;
6039                 if (status)
6040                         goto out;
6041         }
6042         status = decode_open_downgrade(xdr, res);
6043 out:
6044         return status;
6045 }
6046
6047 /*
6048  * Decode ACCESS response
6049  */
6050 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6051                                void *data)
6052 {
6053         struct nfs4_accessres *res = data;
6054         struct compound_hdr hdr;
6055         int status;
6056
6057         status = decode_compound_hdr(xdr, &hdr);
6058         if (status)
6059                 goto out;
6060         status = decode_sequence(xdr, &res->seq_res, rqstp);
6061         if (status)
6062                 goto out;
6063         status = decode_putfh(xdr);
6064         if (status != 0)
6065                 goto out;
6066         status = decode_access(xdr, &res->supported, &res->access);
6067         if (status != 0)
6068                 goto out;
6069         if (res->fattr)
6070                 decode_getfattr(xdr, res->fattr, res->server);
6071 out:
6072         return status;
6073 }
6074
6075 /*
6076  * Decode LOOKUP response
6077  */
6078 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6079                                void *data)
6080 {
6081         struct nfs4_lookup_res *res = data;
6082         struct compound_hdr hdr;
6083         int status;
6084
6085         status = decode_compound_hdr(xdr, &hdr);
6086         if (status)
6087                 goto out;
6088         status = decode_sequence(xdr, &res->seq_res, rqstp);
6089         if (status)
6090                 goto out;
6091         status = decode_putfh(xdr);
6092         if (status)
6093                 goto out;
6094         status = decode_lookup(xdr);
6095         if (status)
6096                 goto out;
6097         status = decode_getfh(xdr, res->fh);
6098         if (status)
6099                 goto out;
6100         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6101 out:
6102         return status;
6103 }
6104
6105 /*
6106  * Decode LOOKUPP response
6107  */
6108 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6109                 void *data)
6110 {
6111         struct nfs4_lookupp_res *res = data;
6112         struct compound_hdr hdr;
6113         int status;
6114
6115         status = decode_compound_hdr(xdr, &hdr);
6116         if (status)
6117                 goto out;
6118         status = decode_sequence(xdr, &res->seq_res, rqstp);
6119         if (status)
6120                 goto out;
6121         status = decode_putfh(xdr);
6122         if (status)
6123                 goto out;
6124         status = decode_lookupp(xdr);
6125         if (status)
6126                 goto out;
6127         status = decode_getfh(xdr, res->fh);
6128         if (status)
6129                 goto out;
6130         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6131 out:
6132         return status;
6133 }
6134
6135 /*
6136  * Decode LOOKUP_ROOT response
6137  */
6138 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6139                                     struct xdr_stream *xdr,
6140                                     void *data)
6141 {
6142         struct nfs4_lookup_res *res = data;
6143         struct compound_hdr hdr;
6144         int status;
6145
6146         status = decode_compound_hdr(xdr, &hdr);
6147         if (status)
6148                 goto out;
6149         status = decode_sequence(xdr, &res->seq_res, rqstp);
6150         if (status)
6151                 goto out;
6152         status = decode_putrootfh(xdr);
6153         if (status)
6154                 goto out;
6155         status = decode_getfh(xdr, res->fh);
6156         if (status == 0)
6157                 status = decode_getfattr_label(xdr, res->fattr,
6158                                                 res->label, res->server);
6159 out:
6160         return status;
6161 }
6162
6163 /*
6164  * Decode REMOVE response
6165  */
6166 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6167                                void *data)
6168 {
6169         struct nfs_removeres *res = data;
6170         struct compound_hdr hdr;
6171         int status;
6172
6173         status = decode_compound_hdr(xdr, &hdr);
6174         if (status)
6175                 goto out;
6176         status = decode_sequence(xdr, &res->seq_res, rqstp);
6177         if (status)
6178                 goto out;
6179         status = decode_putfh(xdr);
6180         if (status)
6181                 goto out;
6182         status = decode_remove(xdr, &res->cinfo);
6183 out:
6184         return status;
6185 }
6186
6187 /*
6188  * Decode RENAME response
6189  */
6190 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6191                                void *data)
6192 {
6193         struct nfs_renameres *res = data;
6194         struct compound_hdr hdr;
6195         int status;
6196
6197         status = decode_compound_hdr(xdr, &hdr);
6198         if (status)
6199                 goto out;
6200         status = decode_sequence(xdr, &res->seq_res, rqstp);
6201         if (status)
6202                 goto out;
6203         status = decode_putfh(xdr);
6204         if (status)
6205                 goto out;
6206         status = decode_savefh(xdr);
6207         if (status)
6208                 goto out;
6209         status = decode_putfh(xdr);
6210         if (status)
6211                 goto out;
6212         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6213 out:
6214         return status;
6215 }
6216
6217 /*
6218  * Decode LINK response
6219  */
6220 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6221                              void *data)
6222 {
6223         struct nfs4_link_res *res = data;
6224         struct compound_hdr hdr;
6225         int status;
6226
6227         status = decode_compound_hdr(xdr, &hdr);
6228         if (status)
6229                 goto out;
6230         status = decode_sequence(xdr, &res->seq_res, rqstp);
6231         if (status)
6232                 goto out;
6233         status = decode_putfh(xdr);
6234         if (status)
6235                 goto out;
6236         status = decode_savefh(xdr);
6237         if (status)
6238                 goto out;
6239         status = decode_putfh(xdr);
6240         if (status)
6241                 goto out;
6242         status = decode_link(xdr, &res->cinfo);
6243         if (status)
6244                 goto out;
6245         /*
6246          * Note order: OP_LINK leaves the directory as the current
6247          *             filehandle.
6248          */
6249         status = decode_restorefh(xdr);
6250         if (status)
6251                 goto out;
6252         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6253 out:
6254         return status;
6255 }
6256
6257 /*
6258  * Decode CREATE response
6259  */
6260 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6261                                void *data)
6262 {
6263         struct nfs4_create_res *res = data;
6264         struct compound_hdr hdr;
6265         int status;
6266
6267         status = decode_compound_hdr(xdr, &hdr);
6268         if (status)
6269                 goto out;
6270         status = decode_sequence(xdr, &res->seq_res, rqstp);
6271         if (status)
6272                 goto out;
6273         status = decode_putfh(xdr);
6274         if (status)
6275                 goto out;
6276         status = decode_create(xdr, &res->dir_cinfo);
6277         if (status)
6278                 goto out;
6279         status = decode_getfh(xdr, res->fh);
6280         if (status)
6281                 goto out;
6282         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6283 out:
6284         return status;
6285 }
6286
6287 /*
6288  * Decode SYMLINK response
6289  */
6290 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6291                                 void *res)
6292 {
6293         return nfs4_xdr_dec_create(rqstp, xdr, res);
6294 }
6295
6296 /*
6297  * Decode GETATTR response
6298  */
6299 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6300                                 void *data)
6301 {
6302         struct nfs4_getattr_res *res = data;
6303         struct compound_hdr hdr;
6304         int status;
6305
6306         status = decode_compound_hdr(xdr, &hdr);
6307         if (status)
6308                 goto out;
6309         status = decode_sequence(xdr, &res->seq_res, rqstp);
6310         if (status)
6311                 goto out;
6312         status = decode_putfh(xdr);
6313         if (status)
6314                 goto out;
6315         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6316 out:
6317         return status;
6318 }
6319
6320 /*
6321  * Encode an SETACL request
6322  */
6323 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6324                                 const void *data)
6325 {
6326         const struct nfs_setaclargs *args = data;
6327         struct compound_hdr hdr = {
6328                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6329         };
6330
6331         encode_compound_hdr(xdr, req, &hdr);
6332         encode_sequence(xdr, &args->seq_args, &hdr);
6333         encode_putfh(xdr, args->fh, &hdr);
6334         encode_setacl(xdr, args, &hdr);
6335         encode_nops(&hdr);
6336 }
6337
6338 /*
6339  * Decode SETACL response
6340  */
6341 static int
6342 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6343                     void *data)
6344 {
6345         struct nfs_setaclres *res = data;
6346         struct compound_hdr hdr;
6347         int status;
6348
6349         status = decode_compound_hdr(xdr, &hdr);
6350         if (status)
6351                 goto out;
6352         status = decode_sequence(xdr, &res->seq_res, rqstp);
6353         if (status)
6354                 goto out;
6355         status = decode_putfh(xdr);
6356         if (status)
6357                 goto out;
6358         status = decode_setattr(xdr);
6359 out:
6360         return status;
6361 }
6362
6363 /*
6364  * Decode GETACL response
6365  */
6366 static int
6367 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6368                     void *data)
6369 {
6370         struct nfs_getaclres *res = data;
6371         struct compound_hdr hdr;
6372         int status;
6373
6374         if (res->acl_scratch != NULL) {
6375                 void *p = page_address(res->acl_scratch);
6376                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6377         }
6378         status = decode_compound_hdr(xdr, &hdr);
6379         if (status)
6380                 goto out;
6381         status = decode_sequence(xdr, &res->seq_res, rqstp);
6382         if (status)
6383                 goto out;
6384         status = decode_putfh(xdr);
6385         if (status)
6386                 goto out;
6387         status = decode_getacl(xdr, rqstp, res);
6388
6389 out:
6390         return status;
6391 }
6392
6393 /*
6394  * Decode CLOSE response
6395  */
6396 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6397                               void *data)
6398 {
6399         struct nfs_closeres *res = data;
6400         struct compound_hdr hdr;
6401         int status;
6402
6403         status = decode_compound_hdr(xdr, &hdr);
6404         if (status)
6405                 goto out;
6406         status = decode_sequence(xdr, &res->seq_res, rqstp);
6407         if (status)
6408                 goto out;
6409         status = decode_putfh(xdr);
6410         if (status)
6411                 goto out;
6412         if (res->lr_res) {
6413                 status = decode_layoutreturn(xdr, res->lr_res);
6414                 res->lr_ret = status;
6415                 if (status)
6416                         goto out;
6417         }
6418         if (res->fattr != NULL) {
6419                 status = decode_getfattr(xdr, res->fattr, res->server);
6420                 if (status != 0)
6421                         goto out;
6422         }
6423         status = decode_close(xdr, res);
6424 out:
6425         return status;
6426 }
6427
6428 /*
6429  * Decode OPEN response
6430  */
6431 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6432                              void *data)
6433 {
6434         struct nfs_openres *res = data;
6435         struct compound_hdr hdr;
6436         int status;
6437
6438         status = decode_compound_hdr(xdr, &hdr);
6439         if (status)
6440                 goto out;
6441         status = decode_sequence(xdr, &res->seq_res, rqstp);
6442         if (status)
6443                 goto out;
6444         status = decode_putfh(xdr);
6445         if (status)
6446                 goto out;
6447         status = decode_open(xdr, res);
6448         if (status)
6449                 goto out;
6450         status = decode_getfh(xdr, &res->fh);
6451         if (status)
6452                 goto out;
6453         if (res->access_request)
6454                 decode_access(xdr, &res->access_supported, &res->access_result);
6455         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6456         if (res->lg_res)
6457                 decode_layoutget(xdr, rqstp, res->lg_res);
6458 out:
6459         return status;
6460 }
6461
6462 /*
6463  * Decode OPEN_CONFIRM response
6464  */
6465 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6466                                      struct xdr_stream *xdr,
6467                                      void *data)
6468 {
6469         struct nfs_open_confirmres *res = data;
6470         struct compound_hdr hdr;
6471         int status;
6472
6473         status = decode_compound_hdr(xdr, &hdr);
6474         if (status)
6475                 goto out;
6476         status = decode_putfh(xdr);
6477         if (status)
6478                 goto out;
6479         status = decode_open_confirm(xdr, res);
6480 out:
6481         return status;
6482 }
6483
6484 /*
6485  * Decode OPEN response
6486  */
6487 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6488                                     struct xdr_stream *xdr,
6489                                     void *data)
6490 {
6491         struct nfs_openres *res = data;
6492         struct compound_hdr hdr;
6493         int status;
6494
6495         status = decode_compound_hdr(xdr, &hdr);
6496         if (status)
6497                 goto out;
6498         status = decode_sequence(xdr, &res->seq_res, rqstp);
6499         if (status)
6500                 goto out;
6501         status = decode_putfh(xdr);
6502         if (status)
6503                 goto out;
6504         status = decode_open(xdr, res);
6505         if (status)
6506                 goto out;
6507         if (res->access_request)
6508                 decode_access(xdr, &res->access_supported, &res->access_result);
6509         decode_getfattr(xdr, res->f_attr, res->server);
6510         if (res->lg_res)
6511                 decode_layoutget(xdr, rqstp, res->lg_res);
6512 out:
6513         return status;
6514 }
6515
6516 /*
6517  * Decode SETATTR response
6518  */
6519 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6520                                 struct xdr_stream *xdr,
6521                                 void *data)
6522 {
6523         struct nfs_setattrres *res = data;
6524         struct compound_hdr hdr;
6525         int status;
6526
6527         status = decode_compound_hdr(xdr, &hdr);
6528         if (status)
6529                 goto out;
6530         status = decode_sequence(xdr, &res->seq_res, rqstp);
6531         if (status)
6532                 goto out;
6533         status = decode_putfh(xdr);
6534         if (status)
6535                 goto out;
6536         status = decode_setattr(xdr);
6537         if (status)
6538                 goto out;
6539         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6540 out:
6541         return status;
6542 }
6543
6544 /*
6545  * Decode LOCK response
6546  */
6547 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6548                              void *data)
6549 {
6550         struct nfs_lock_res *res = data;
6551         struct compound_hdr hdr;
6552         int status;
6553
6554         status = decode_compound_hdr(xdr, &hdr);
6555         if (status)
6556                 goto out;
6557         status = decode_sequence(xdr, &res->seq_res, rqstp);
6558         if (status)
6559                 goto out;
6560         status = decode_putfh(xdr);
6561         if (status)
6562                 goto out;
6563         status = decode_lock(xdr, res);
6564 out:
6565         return status;
6566 }
6567
6568 /*
6569  * Decode LOCKT response
6570  */
6571 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6572                               void *data)
6573 {
6574         struct nfs_lockt_res *res = data;
6575         struct compound_hdr hdr;
6576         int status;
6577
6578         status = decode_compound_hdr(xdr, &hdr);
6579         if (status)
6580                 goto out;
6581         status = decode_sequence(xdr, &res->seq_res, rqstp);
6582         if (status)
6583                 goto out;
6584         status = decode_putfh(xdr);
6585         if (status)
6586                 goto out;
6587         status = decode_lockt(xdr, res);
6588 out:
6589         return status;
6590 }
6591
6592 /*
6593  * Decode LOCKU response
6594  */
6595 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6596                               void *data)
6597 {
6598         struct nfs_locku_res *res = data;
6599         struct compound_hdr hdr;
6600         int status;
6601
6602         status = decode_compound_hdr(xdr, &hdr);
6603         if (status)
6604                 goto out;
6605         status = decode_sequence(xdr, &res->seq_res, rqstp);
6606         if (status)
6607                 goto out;
6608         status = decode_putfh(xdr);
6609         if (status)
6610                 goto out;
6611         status = decode_locku(xdr, res);
6612 out:
6613         return status;
6614 }
6615
6616 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6617                                           struct xdr_stream *xdr, void *dummy)
6618 {
6619         struct compound_hdr hdr;
6620         int status;
6621
6622         status = decode_compound_hdr(xdr, &hdr);
6623         if (!status)
6624                 status = decode_release_lockowner(xdr);
6625         return status;
6626 }
6627
6628 /*
6629  * Decode READLINK response
6630  */
6631 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6632                                  struct xdr_stream *xdr,
6633                                  void *data)
6634 {
6635         struct nfs4_readlink_res *res = data;
6636         struct compound_hdr hdr;
6637         int status;
6638
6639         status = decode_compound_hdr(xdr, &hdr);
6640         if (status)
6641                 goto out;
6642         status = decode_sequence(xdr, &res->seq_res, rqstp);
6643         if (status)
6644                 goto out;
6645         status = decode_putfh(xdr);
6646         if (status)
6647                 goto out;
6648         status = decode_readlink(xdr, rqstp);
6649 out:
6650         return status;
6651 }
6652
6653 /*
6654  * Decode READDIR response
6655  */
6656 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6657                                 void *data)
6658 {
6659         struct nfs4_readdir_res *res = data;
6660         struct compound_hdr hdr;
6661         int status;
6662
6663         status = decode_compound_hdr(xdr, &hdr);
6664         if (status)
6665                 goto out;
6666         status = decode_sequence(xdr, &res->seq_res, rqstp);
6667         if (status)
6668                 goto out;
6669         status = decode_putfh(xdr);
6670         if (status)
6671                 goto out;
6672         status = decode_readdir(xdr, rqstp, res);
6673 out:
6674         return status;
6675 }
6676
6677 /*
6678  * Decode Read response
6679  */
6680 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6681                              void *data)
6682 {
6683         struct nfs_pgio_res *res = data;
6684         struct compound_hdr hdr;
6685         int status;
6686
6687         status = decode_compound_hdr(xdr, &hdr);
6688         res->op_status = hdr.status;
6689         if (status)
6690                 goto out;
6691         status = decode_sequence(xdr, &res->seq_res, rqstp);
6692         if (status)
6693                 goto out;
6694         status = decode_putfh(xdr);
6695         if (status)
6696                 goto out;
6697         status = decode_read(xdr, rqstp, res);
6698         if (!status)
6699                 status = res->count;
6700 out:
6701         return status;
6702 }
6703
6704 /*
6705  * Decode WRITE response
6706  */
6707 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6708                               void *data)
6709 {
6710         struct nfs_pgio_res *res = data;
6711         struct compound_hdr hdr;
6712         int status;
6713
6714         status = decode_compound_hdr(xdr, &hdr);
6715         res->op_status = hdr.status;
6716         if (status)
6717                 goto out;
6718         status = decode_sequence(xdr, &res->seq_res, rqstp);
6719         if (status)
6720                 goto out;
6721         status = decode_putfh(xdr);
6722         if (status)
6723                 goto out;
6724         status = decode_write(xdr, res);
6725         if (status)
6726                 goto out;
6727         if (res->fattr)
6728                 decode_getfattr(xdr, res->fattr, res->server);
6729         if (!status)
6730                 status = res->count;
6731 out:
6732         return status;
6733 }
6734
6735 /*
6736  * Decode COMMIT response
6737  */
6738 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6739                                void *data)
6740 {
6741         struct nfs_commitres *res = data;
6742         struct compound_hdr hdr;
6743         int status;
6744
6745         status = decode_compound_hdr(xdr, &hdr);
6746         res->op_status = hdr.status;
6747         if (status)
6748                 goto out;
6749         status = decode_sequence(xdr, &res->seq_res, rqstp);
6750         if (status)
6751                 goto out;
6752         status = decode_putfh(xdr);
6753         if (status)
6754                 goto out;
6755         status = decode_commit(xdr, res);
6756 out:
6757         return status;
6758 }
6759
6760 /*
6761  * Decode FSINFO response
6762  */
6763 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6764                                void *data)
6765 {
6766         struct nfs4_fsinfo_res *res = data;
6767         struct compound_hdr hdr;
6768         int status;
6769
6770         status = decode_compound_hdr(xdr, &hdr);
6771         if (!status)
6772                 status = decode_sequence(xdr, &res->seq_res, req);
6773         if (!status)
6774                 status = decode_putfh(xdr);
6775         if (!status)
6776                 status = decode_fsinfo(xdr, res->fsinfo);
6777         return status;
6778 }
6779
6780 /*
6781  * Decode PATHCONF response
6782  */
6783 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6784                                  void *data)
6785 {
6786         struct nfs4_pathconf_res *res = data;
6787         struct compound_hdr hdr;
6788         int status;
6789
6790         status = decode_compound_hdr(xdr, &hdr);
6791         if (!status)
6792                 status = decode_sequence(xdr, &res->seq_res, req);
6793         if (!status)
6794                 status = decode_putfh(xdr);
6795         if (!status)
6796                 status = decode_pathconf(xdr, res->pathconf);
6797         return status;
6798 }
6799
6800 /*
6801  * Decode STATFS response
6802  */
6803 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6804                                void *data)
6805 {
6806         struct nfs4_statfs_res *res = data;
6807         struct compound_hdr hdr;
6808         int status;
6809
6810         status = decode_compound_hdr(xdr, &hdr);
6811         if (!status)
6812                 status = decode_sequence(xdr, &res->seq_res, req);
6813         if (!status)
6814                 status = decode_putfh(xdr);
6815         if (!status)
6816                 status = decode_statfs(xdr, res->fsstat);
6817         return status;
6818 }
6819
6820 /*
6821  * Decode GETATTR_BITMAP response
6822  */
6823 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6824                                     struct xdr_stream *xdr,
6825                                     void *data)
6826 {
6827         struct nfs4_server_caps_res *res = data;
6828         struct compound_hdr hdr;
6829         int status;
6830
6831         status = decode_compound_hdr(xdr, &hdr);
6832         if (status)
6833                 goto out;
6834         status = decode_sequence(xdr, &res->seq_res, req);
6835         if (status)
6836                 goto out;
6837         status = decode_putfh(xdr);
6838         if (status)
6839                 goto out;
6840         status = decode_server_caps(xdr, res);
6841 out:
6842         return status;
6843 }
6844
6845 /*
6846  * Decode RENEW response
6847  */
6848 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6849                               void *__unused)
6850 {
6851         struct compound_hdr hdr;
6852         int status;
6853
6854         status = decode_compound_hdr(xdr, &hdr);
6855         if (!status)
6856                 status = decode_renew(xdr);
6857         return status;
6858 }
6859
6860 /*
6861  * Decode SETCLIENTID response
6862  */
6863 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6864                                     struct xdr_stream *xdr,
6865                                     void *data)
6866 {
6867         struct nfs4_setclientid_res *res = data;
6868         struct compound_hdr hdr;
6869         int status;
6870
6871         status = decode_compound_hdr(xdr, &hdr);
6872         if (!status)
6873                 status = decode_setclientid(xdr, res);
6874         return status;
6875 }
6876
6877 /*
6878  * Decode SETCLIENTID_CONFIRM response
6879  */
6880 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6881                                             struct xdr_stream *xdr,
6882                                             void *data)
6883 {
6884         struct compound_hdr hdr;
6885         int status;
6886
6887         status = decode_compound_hdr(xdr, &hdr);
6888         if (!status)
6889                 status = decode_setclientid_confirm(xdr);
6890         return status;
6891 }
6892
6893 /*
6894  * Decode DELEGRETURN response
6895  */
6896 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6897                                     struct xdr_stream *xdr,
6898                                     void *data)
6899 {
6900         struct nfs4_delegreturnres *res = data;
6901         struct compound_hdr hdr;
6902         int status;
6903
6904         status = decode_compound_hdr(xdr, &hdr);
6905         if (status)
6906                 goto out;
6907         status = decode_sequence(xdr, &res->seq_res, rqstp);
6908         if (status)
6909                 goto out;
6910         status = decode_putfh(xdr);
6911         if (status != 0)
6912                 goto out;
6913         if (res->lr_res) {
6914                 status = decode_layoutreturn(xdr, res->lr_res);
6915                 res->lr_ret = status;
6916                 if (status)
6917                         goto out;
6918         }
6919         if (res->fattr) {
6920                 status = decode_getfattr(xdr, res->fattr, res->server);
6921                 if (status != 0)
6922                         goto out;
6923         }
6924         status = decode_delegreturn(xdr);
6925 out:
6926         return status;
6927 }
6928
6929 /*
6930  * Decode FS_LOCATIONS response
6931  */
6932 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6933                                      struct xdr_stream *xdr,
6934                                      void *data)
6935 {
6936         struct nfs4_fs_locations_res *res = data;
6937         struct compound_hdr hdr;
6938         int status;
6939
6940         status = decode_compound_hdr(xdr, &hdr);
6941         if (status)
6942                 goto out;
6943         status = decode_sequence(xdr, &res->seq_res, req);
6944         if (status)
6945                 goto out;
6946         status = decode_putfh(xdr);
6947         if (status)
6948                 goto out;
6949         if (res->migration) {
6950                 xdr_enter_page(xdr, PAGE_SIZE);
6951                 status = decode_getfattr_generic(xdr,
6952                                         &res->fs_locations->fattr,
6953                                          NULL, res->fs_locations,
6954                                          NULL, res->fs_locations->server);
6955                 if (status)
6956                         goto out;
6957                 if (res->renew)
6958                         status = decode_renew(xdr);
6959         } else {
6960                 status = decode_lookup(xdr);
6961                 if (status)
6962                         goto out;
6963                 xdr_enter_page(xdr, PAGE_SIZE);
6964                 status = decode_getfattr_generic(xdr,
6965                                         &res->fs_locations->fattr,
6966                                          NULL, res->fs_locations,
6967                                          NULL, res->fs_locations->server);
6968         }
6969 out:
6970         return status;
6971 }
6972
6973 /*
6974  * Decode SECINFO response
6975  */
6976 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6977                                 struct xdr_stream *xdr,
6978                                 void *data)
6979 {
6980         struct nfs4_secinfo_res *res = data;
6981         struct compound_hdr hdr;
6982         int status;
6983
6984         status = decode_compound_hdr(xdr, &hdr);
6985         if (status)
6986                 goto out;
6987         status = decode_sequence(xdr, &res->seq_res, rqstp);
6988         if (status)
6989                 goto out;
6990         status = decode_putfh(xdr);
6991         if (status)
6992                 goto out;
6993         status = decode_secinfo(xdr, res);
6994 out:
6995         return status;
6996 }
6997
6998 /*
6999  * Decode FSID_PRESENT response
7000  */
7001 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7002                                      struct xdr_stream *xdr,
7003                                      void *data)
7004 {
7005         struct nfs4_fsid_present_res *res = data;
7006         struct compound_hdr hdr;
7007         int status;
7008
7009         status = decode_compound_hdr(xdr, &hdr);
7010         if (status)
7011                 goto out;
7012         status = decode_sequence(xdr, &res->seq_res, rqstp);
7013         if (status)
7014                 goto out;
7015         status = decode_putfh(xdr);
7016         if (status)
7017                 goto out;
7018         status = decode_getfh(xdr, res->fh);
7019         if (status)
7020                 goto out;
7021         if (res->renew)
7022                 status = decode_renew(xdr);
7023 out:
7024         return status;
7025 }
7026
7027 #if defined(CONFIG_NFS_V4_1)
7028 /*
7029  * Decode BIND_CONN_TO_SESSION response
7030  */
7031 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7032                                         struct xdr_stream *xdr,
7033                                         void *res)
7034 {
7035         struct compound_hdr hdr;
7036         int status;
7037
7038         status = decode_compound_hdr(xdr, &hdr);
7039         if (!status)
7040                 status = decode_bind_conn_to_session(xdr, res);
7041         return status;
7042 }
7043
7044 /*
7045  * Decode EXCHANGE_ID response
7046  */
7047 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7048                                     struct xdr_stream *xdr,
7049                                     void *res)
7050 {
7051         struct compound_hdr hdr;
7052         int status;
7053
7054         status = decode_compound_hdr(xdr, &hdr);
7055         if (!status)
7056                 status = decode_exchange_id(xdr, res);
7057         return status;
7058 }
7059
7060 /*
7061  * Decode CREATE_SESSION response
7062  */
7063 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7064                                        struct xdr_stream *xdr,
7065                                        void *res)
7066 {
7067         struct compound_hdr hdr;
7068         int status;
7069
7070         status = decode_compound_hdr(xdr, &hdr);
7071         if (!status)
7072                 status = decode_create_session(xdr, res);
7073         return status;
7074 }
7075
7076 /*
7077  * Decode DESTROY_SESSION response
7078  */
7079 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7080                                         struct xdr_stream *xdr,
7081                                         void *res)
7082 {
7083         struct compound_hdr hdr;
7084         int status;
7085
7086         status = decode_compound_hdr(xdr, &hdr);
7087         if (!status)
7088                 status = decode_destroy_session(xdr, res);
7089         return status;
7090 }
7091
7092 /*
7093  * Decode DESTROY_CLIENTID response
7094  */
7095 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7096                                         struct xdr_stream *xdr,
7097                                         void *res)
7098 {
7099         struct compound_hdr hdr;
7100         int status;
7101
7102         status = decode_compound_hdr(xdr, &hdr);
7103         if (!status)
7104                 status = decode_destroy_clientid(xdr, res);
7105         return status;
7106 }
7107
7108 /*
7109  * Decode SEQUENCE response
7110  */
7111 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7112                                  struct xdr_stream *xdr,
7113                                  void *res)
7114 {
7115         struct compound_hdr hdr;
7116         int status;
7117
7118         status = decode_compound_hdr(xdr, &hdr);
7119         if (!status)
7120                 status = decode_sequence(xdr, res, rqstp);
7121         return status;
7122 }
7123
7124 /*
7125  * Decode GET_LEASE_TIME response
7126  */
7127 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7128                                        struct xdr_stream *xdr,
7129                                        void *data)
7130 {
7131         struct nfs4_get_lease_time_res *res = data;
7132         struct compound_hdr hdr;
7133         int status;
7134
7135         status = decode_compound_hdr(xdr, &hdr);
7136         if (!status)
7137                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7138         if (!status)
7139                 status = decode_putrootfh(xdr);
7140         if (!status)
7141                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7142         return status;
7143 }
7144
7145 /*
7146  * Decode RECLAIM_COMPLETE response
7147  */
7148 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7149                                          struct xdr_stream *xdr,
7150                                          void *data)
7151 {
7152         struct nfs41_reclaim_complete_res *res = data;
7153         struct compound_hdr hdr;
7154         int status;
7155
7156         status = decode_compound_hdr(xdr, &hdr);
7157         if (!status)
7158                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7159         if (!status)
7160                 status = decode_reclaim_complete(xdr, NULL);
7161         return status;
7162 }
7163
7164 /*
7165  * Decode GETDEVINFO response
7166  */
7167 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7168                                       struct xdr_stream *xdr,
7169                                       void *data)
7170 {
7171         struct nfs4_getdeviceinfo_res *res = data;
7172         struct compound_hdr hdr;
7173         int status;
7174
7175         status = decode_compound_hdr(xdr, &hdr);
7176         if (status != 0)
7177                 goto out;
7178         status = decode_sequence(xdr, &res->seq_res, rqstp);
7179         if (status != 0)
7180                 goto out;
7181         status = decode_getdeviceinfo(xdr, res);
7182 out:
7183         return status;
7184 }
7185
7186 /*
7187  * Decode LAYOUTGET response
7188  */
7189 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7190                                   struct xdr_stream *xdr,
7191                                   void *data)
7192 {
7193         struct nfs4_layoutget_res *res = data;
7194         struct compound_hdr hdr;
7195         int status;
7196
7197         status = decode_compound_hdr(xdr, &hdr);
7198         if (status)
7199                 goto out;
7200         status = decode_sequence(xdr, &res->seq_res, rqstp);
7201         if (status)
7202                 goto out;
7203         status = decode_putfh(xdr);
7204         if (status)
7205                 goto out;
7206         status = decode_layoutget(xdr, rqstp, res);
7207 out:
7208         return status;
7209 }
7210
7211 /*
7212  * Decode LAYOUTRETURN response
7213  */
7214 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7215                                      struct xdr_stream *xdr,
7216                                      void *data)
7217 {
7218         struct nfs4_layoutreturn_res *res = data;
7219         struct compound_hdr hdr;
7220         int status;
7221
7222         status = decode_compound_hdr(xdr, &hdr);
7223         if (status)
7224                 goto out;
7225         status = decode_sequence(xdr, &res->seq_res, rqstp);
7226         if (status)
7227                 goto out;
7228         status = decode_putfh(xdr);
7229         if (status)
7230                 goto out;
7231         status = decode_layoutreturn(xdr, res);
7232 out:
7233         return status;
7234 }
7235
7236 /*
7237  * Decode LAYOUTCOMMIT response
7238  */
7239 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7240                                      struct xdr_stream *xdr,
7241                                      void *data)
7242 {
7243         struct nfs4_layoutcommit_res *res = data;
7244         struct compound_hdr hdr;
7245         int status;
7246
7247         status = decode_compound_hdr(xdr, &hdr);
7248         if (status)
7249                 goto out;
7250         status = decode_sequence(xdr, &res->seq_res, rqstp);
7251         if (status)
7252                 goto out;
7253         status = decode_putfh(xdr);
7254         if (status)
7255                 goto out;
7256         status = decode_layoutcommit(xdr, rqstp, res);
7257         if (status)
7258                 goto out;
7259         decode_getfattr(xdr, res->fattr, res->server);
7260 out:
7261         return status;
7262 }
7263
7264 /*
7265  * Decode SECINFO_NO_NAME response
7266  */
7267 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7268                                         struct xdr_stream *xdr,
7269                                         void *data)
7270 {
7271         struct nfs4_secinfo_res *res = data;
7272         struct compound_hdr hdr;
7273         int status;
7274
7275         status = decode_compound_hdr(xdr, &hdr);
7276         if (status)
7277                 goto out;
7278         status = decode_sequence(xdr, &res->seq_res, rqstp);
7279         if (status)
7280                 goto out;
7281         status = decode_putrootfh(xdr);
7282         if (status)
7283                 goto out;
7284         status = decode_secinfo_no_name(xdr, res);
7285 out:
7286         return status;
7287 }
7288
7289 /*
7290  * Decode TEST_STATEID response
7291  */
7292 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7293                                      struct xdr_stream *xdr,
7294                                      void *data)
7295 {
7296         struct nfs41_test_stateid_res *res = data;
7297         struct compound_hdr hdr;
7298         int status;
7299
7300         status = decode_compound_hdr(xdr, &hdr);
7301         if (status)
7302                 goto out;
7303         status = decode_sequence(xdr, &res->seq_res, rqstp);
7304         if (status)
7305                 goto out;
7306         status = decode_test_stateid(xdr, res);
7307 out:
7308         return status;
7309 }
7310
7311 /*
7312  * Decode FREE_STATEID response
7313  */
7314 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7315                                      struct xdr_stream *xdr,
7316                                      void *data)
7317 {
7318         struct nfs41_free_stateid_res *res = data;
7319         struct compound_hdr hdr;
7320         int status;
7321
7322         status = decode_compound_hdr(xdr, &hdr);
7323         if (status)
7324                 goto out;
7325         status = decode_sequence(xdr, &res->seq_res, rqstp);
7326         if (status)
7327                 goto out;
7328         status = decode_free_stateid(xdr, res);
7329 out:
7330         return status;
7331 }
7332 #endif /* CONFIG_NFS_V4_1 */
7333
7334 /**
7335  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7336  *                      the local page cache.
7337  * @xdr: XDR stream where entry resides
7338  * @entry: buffer to fill in with entry data
7339  * @plus: boolean indicating whether this should be a readdirplus entry
7340  *
7341  * Returns zero if successful, otherwise a negative errno value is
7342  * returned.
7343  *
7344  * This function is not invoked during READDIR reply decoding, but
7345  * rather whenever an application invokes the getdents(2) system call
7346  * on a directory already in our cache.
7347  */
7348 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7349                        bool plus)
7350 {
7351         unsigned int savep;
7352         uint32_t bitmap[3] = {0};
7353         uint32_t len;
7354         uint64_t new_cookie;
7355         __be32 *p = xdr_inline_decode(xdr, 4);
7356         if (unlikely(!p))
7357                 return -EAGAIN;
7358         if (*p == xdr_zero) {
7359                 p = xdr_inline_decode(xdr, 4);
7360                 if (unlikely(!p))
7361                         return -EAGAIN;
7362                 if (*p == xdr_zero)
7363                         return -EAGAIN;
7364                 entry->eof = 1;
7365                 return -EBADCOOKIE;
7366         }
7367
7368         p = xdr_inline_decode(xdr, 12);
7369         if (unlikely(!p))
7370                 return -EAGAIN;
7371         p = xdr_decode_hyper(p, &new_cookie);
7372         entry->len = be32_to_cpup(p);
7373
7374         p = xdr_inline_decode(xdr, entry->len);
7375         if (unlikely(!p))
7376                 return -EAGAIN;
7377         entry->name = (const char *) p;
7378
7379         /*
7380          * In case the server doesn't return an inode number,
7381          * we fake one here.  (We don't use inode number 0,
7382          * since glibc seems to choke on it...)
7383          */
7384         entry->ino = 1;
7385         entry->fattr->valid = 0;
7386
7387         if (decode_attr_bitmap(xdr, bitmap) < 0)
7388                 return -EAGAIN;
7389
7390         if (decode_attr_length(xdr, &len, &savep) < 0)
7391                 return -EAGAIN;
7392
7393         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7394                         NULL, entry->label, entry->server) < 0)
7395                 return -EAGAIN;
7396         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7397                 entry->ino = entry->fattr->mounted_on_fileid;
7398         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7399                 entry->ino = entry->fattr->fileid;
7400
7401         entry->d_type = DT_UNKNOWN;
7402         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7403                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7404
7405         entry->prev_cookie = entry->cookie;
7406         entry->cookie = new_cookie;
7407
7408         return 0;
7409 }
7410
7411 /*
7412  * We need to translate between nfs status return values and
7413  * the local errno values which may not be the same.
7414  */
7415 static struct {
7416         int stat;
7417         int errno;
7418 } nfs_errtbl[] = {
7419         { NFS4_OK,              0               },
7420         { NFS4ERR_PERM,         -EPERM          },
7421         { NFS4ERR_NOENT,        -ENOENT         },
7422         { NFS4ERR_IO,           -errno_NFSERR_IO},
7423         { NFS4ERR_NXIO,         -ENXIO          },
7424         { NFS4ERR_ACCESS,       -EACCES         },
7425         { NFS4ERR_EXIST,        -EEXIST         },
7426         { NFS4ERR_XDEV,         -EXDEV          },
7427         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7428         { NFS4ERR_ISDIR,        -EISDIR         },
7429         { NFS4ERR_INVAL,        -EINVAL         },
7430         { NFS4ERR_FBIG,         -EFBIG          },
7431         { NFS4ERR_NOSPC,        -ENOSPC         },
7432         { NFS4ERR_ROFS,         -EROFS          },
7433         { NFS4ERR_MLINK,        -EMLINK         },
7434         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7435         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7436         { NFS4ERR_DQUOT,        -EDQUOT         },
7437         { NFS4ERR_STALE,        -ESTALE         },
7438         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7439         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7440         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7441         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7442         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7443         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7444         { NFS4ERR_LOCKED,       -EAGAIN         },
7445         { NFS4ERR_SYMLINK,      -ELOOP          },
7446         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7447         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7448         { -1,                   -EIO            }
7449 };
7450
7451 /*
7452  * Convert an NFS error code to a local one.
7453  * This one is used jointly by NFSv2 and NFSv3.
7454  */
7455 static int
7456 nfs4_stat_to_errno(int stat)
7457 {
7458         int i;
7459         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7460                 if (nfs_errtbl[i].stat == stat)
7461                         return nfs_errtbl[i].errno;
7462         }
7463         if (stat <= 10000 || stat > 10100) {
7464                 /* The server is looney tunes. */
7465                 return -EREMOTEIO;
7466         }
7467         /* If we cannot translate the error, the recovery routines should
7468          * handle it.
7469          * Note: remaining NFSv4 error codes have values > 10000, so should
7470          * not conflict with native Linux error codes.
7471          */
7472         return -stat;
7473 }
7474
7475 #ifdef CONFIG_NFS_V4_2
7476 #include "nfs42xdr.c"
7477 #endif /* CONFIG_NFS_V4_2 */
7478
7479 #define PROC(proc, argtype, restype)                            \
7480 [NFSPROC4_CLNT_##proc] = {                                      \
7481         .p_proc   = NFSPROC4_COMPOUND,                          \
7482         .p_encode = nfs4_xdr_##argtype,                         \
7483         .p_decode = nfs4_xdr_##restype,                         \
7484         .p_arglen = NFS4_##argtype##_sz,                        \
7485         .p_replen = NFS4_##restype##_sz,                        \
7486         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7487         .p_name   = #proc,                                      \
7488 }
7489
7490 #define STUB(proc)              \
7491 [NFSPROC4_CLNT_##proc] = {      \
7492         .p_name = #proc,        \
7493 }
7494
7495 #if defined(CONFIG_NFS_V4_1)
7496 #define PROC41(proc, argtype, restype)                          \
7497         PROC(proc, argtype, restype)
7498 #else
7499 #define PROC41(proc, argtype, restype)                          \
7500         STUB(proc)
7501 #endif
7502
7503 #if defined(CONFIG_NFS_V4_2)
7504 #define PROC42(proc, argtype, restype)                          \
7505         PROC(proc, argtype, restype)
7506 #else
7507 #define PROC42(proc, argtype, restype)                          \
7508         STUB(proc)
7509 #endif
7510
7511 const struct rpc_procinfo nfs4_procedures[] = {
7512         PROC(READ,              enc_read,               dec_read),
7513         PROC(WRITE,             enc_write,              dec_write),
7514         PROC(COMMIT,            enc_commit,             dec_commit),
7515         PROC(OPEN,              enc_open,               dec_open),
7516         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7517         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7518         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7519         PROC(CLOSE,             enc_close,              dec_close),
7520         PROC(SETATTR,           enc_setattr,            dec_setattr),
7521         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7522         PROC(RENEW,             enc_renew,              dec_renew),
7523         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7524         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7525         PROC(LOCK,              enc_lock,               dec_lock),
7526         PROC(LOCKT,             enc_lockt,              dec_lockt),
7527         PROC(LOCKU,             enc_locku,              dec_locku),
7528         PROC(ACCESS,            enc_access,             dec_access),
7529         PROC(GETATTR,           enc_getattr,            dec_getattr),
7530         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7531         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7532         PROC(REMOVE,            enc_remove,             dec_remove),
7533         PROC(RENAME,            enc_rename,             dec_rename),
7534         PROC(LINK,              enc_link,               dec_link),
7535         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7536         PROC(CREATE,            enc_create,             dec_create),
7537         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7538         PROC(STATFS,            enc_statfs,             dec_statfs),
7539         PROC(READLINK,          enc_readlink,           dec_readlink),
7540         PROC(READDIR,           enc_readdir,            dec_readdir),
7541         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7542         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7543         PROC(GETACL,            enc_getacl,             dec_getacl),
7544         PROC(SETACL,            enc_setacl,             dec_setacl),
7545         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7546         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7547         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7548         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7549         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7550         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7551         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7552         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7553         PROC41(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
7554         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7555         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7556         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7557         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7558         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7559         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7560         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7561         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7562         STUB(GETDEVICELIST),
7563         PROC41(BIND_CONN_TO_SESSION,
7564                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7565         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7566         PROC42(SEEK,            enc_seek,               dec_seek),
7567         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7568         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7569         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7570         PROC42(CLONE,           enc_clone,              dec_clone),
7571         PROC42(COPY,            enc_copy,               dec_copy),
7572         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7573         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7574 };
7575
7576 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7577 const struct rpc_version nfs_version4 = {
7578         .number                 = 4,
7579         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7580         .procs                  = nfs4_procedures,
7581         .counts                 = nfs_version4_counts,
7582 };
7583
7584 /*
7585  * Local variables:
7586  *  c-basic-offset: 8
7587  * End:
7588  */