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 + 1)
 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 + 1)
 224 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 225 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1 + 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 + 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                                 (1)
 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                                 1 /* possible XDR padding */)
 397 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 398                                 encode_stateid_maxsz)
 399 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 400                                 decode_stateid_maxsz + \
 401                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + 1)
 402 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 403                                 2 /* offset */ + \
 404                                 2 /* length */ + \
 405                                 1 /* reclaim */ + \
 406                                 encode_stateid_maxsz + \
 407                                 1 /* new offset (true) */ + \
 408                                 2 /* last byte written */ + \
 409                                 1 /* nt_timechanged (false) */ + \
 410                                 1 /* layoutupdate4 layout type */ + \
 411                                 1 /* layoutupdate4 opaqueue len */)
 412                                   /* the actual content of layoutupdate4 should
 413                                      be allocated by drivers and spliced in
 414                                      using xdr_write_pages */
 415 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 416 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 417                                 encode_stateid_maxsz + \
 418                                 1 + \
 419                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 420 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 421                                 1 + decode_stateid_maxsz)
 422 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 423 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 424 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 425                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 426 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 427 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 428                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 429 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 430 #else /* CONFIG_NFS_V4_1 */
 431 #define encode_sequence_maxsz   0
 432 #define decode_sequence_maxsz   0
 433 #define encode_layoutreturn_maxsz 0
 434 #define decode_layoutreturn_maxsz 0
 435 #define encode_layoutget_maxsz  0
 436 #define decode_layoutget_maxsz  0
 437 #endif /* CONFIG_NFS_V4_1 */
 438
 439 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 440 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 441 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_read_maxsz)
 445 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 446                                 decode_sequence_maxsz + \
 447                                 decode_putfh_maxsz + \
 448                                 decode_read_maxsz)
 449 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 450                                 encode_sequence_maxsz + \
 451                                 encode_putfh_maxsz + \
 452                                 encode_readlink_maxsz)
 453 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 454                                 decode_sequence_maxsz + \
 455                                 decode_putfh_maxsz + \
 456                                 decode_readlink_maxsz)
 457 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 458                                 encode_sequence_maxsz + \
 459                                 encode_putfh_maxsz + \
 460                                 encode_readdir_maxsz)
 461 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 462                                 decode_sequence_maxsz + \
 463                                 decode_putfh_maxsz + \
 464                                 decode_readdir_maxsz)
 465 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 466                                 encode_sequence_maxsz + \
 467                                 encode_putfh_maxsz + \
 468                                 encode_write_maxsz + \
 469                                 encode_getattr_maxsz)
 470 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 471                                 decode_sequence_maxsz + \
 472                                 decode_putfh_maxsz + \
 473                                 decode_write_maxsz + \
 474                                 decode_getattr_maxsz)
 475 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 476                                 encode_sequence_maxsz + \
 477                                 encode_putfh_maxsz + \
 478                                 encode_commit_maxsz)
 479 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 480                                 decode_sequence_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_commit_maxsz)
 483 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 484                                 encode_sequence_maxsz + \
 485                                 encode_putfh_maxsz + \
 486                                 encode_open_maxsz + \
 487                                 encode_access_maxsz + \
 488                                 encode_getfh_maxsz + \
 489                                 encode_getattr_maxsz + \
 490                                 encode_layoutget_maxsz)
 491 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 492                                 decode_sequence_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_open_maxsz + \
 495                                 decode_access_maxsz + \
 496                                 decode_getfh_maxsz + \
 497                                 decode_getattr_maxsz + \
 498                                 decode_layoutget_maxsz)
 499 #define NFS4_enc_open_confirm_sz \
 500                                 (compound_encode_hdr_maxsz + \
 501                                  encode_putfh_maxsz + \
 502                                  encode_open_confirm_maxsz)
 503 #define NFS4_dec_open_confirm_sz \
 504                                 (compound_decode_hdr_maxsz + \
 505                                  decode_putfh_maxsz + \
 506                                  decode_open_confirm_maxsz)
 507 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 508                                         encode_sequence_maxsz + \
 509                                         encode_putfh_maxsz + \
 510                                         encode_open_maxsz + \
 511                                         encode_access_maxsz + \
 512                                         encode_getattr_maxsz + \
 513                                         encode_layoutget_maxsz)
 514 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 515                                         decode_sequence_maxsz + \
 516                                         decode_putfh_maxsz + \
 517                                         decode_open_maxsz + \
 518                                         decode_access_maxsz + \
 519                                         decode_getattr_maxsz + \
 520                                         decode_layoutget_maxsz)
 521 #define NFS4_enc_open_downgrade_sz \
 522                                 (compound_encode_hdr_maxsz + \
 523                                  encode_sequence_maxsz + \
 524                                  encode_putfh_maxsz + \
 525                                  encode_layoutreturn_maxsz + \
 526                                  encode_open_downgrade_maxsz)
 527 #define NFS4_dec_open_downgrade_sz \
 528                                 (compound_decode_hdr_maxsz + \
 529                                  decode_sequence_maxsz + \
 530                                  decode_putfh_maxsz + \
 531                                  decode_layoutreturn_maxsz + \
 532                                  decode_open_downgrade_maxsz)
 533 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 534                                  encode_sequence_maxsz + \
 535                                  encode_putfh_maxsz + \
 536                                  encode_layoutreturn_maxsz + \
 537                                  encode_close_maxsz + \
 538                                  encode_getattr_maxsz)
 539 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 540                                  decode_sequence_maxsz + \
 541                                  decode_putfh_maxsz + \
 542                                  decode_layoutreturn_maxsz + \
 543                                  decode_close_maxsz + \
 544                                  decode_getattr_maxsz)
 545 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 546                                  encode_sequence_maxsz + \
 547                                  encode_putfh_maxsz + \
 548                                  encode_setattr_maxsz + \
 549                                  encode_getattr_maxsz)
 550 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 551                                  decode_sequence_maxsz + \
 552                                  decode_putfh_maxsz + \
 553                                  decode_setattr_maxsz + \
 554                                  decode_getattr_maxsz)
 555 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 556                                 encode_sequence_maxsz + \
 557                                 encode_putfh_maxsz + \
 558                                 encode_fsinfo_maxsz)
 559 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 560                                 decode_sequence_maxsz + \
 561                                 decode_putfh_maxsz + \
 562                                 decode_fsinfo_maxsz)
 563 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 564                                 encode_renew_maxsz)
 565 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 566                                 decode_renew_maxsz)
 567 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 568                                 encode_setclientid_maxsz)
 569 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 570                                 decode_setclientid_maxsz)
 571 #define NFS4_enc_setclientid_confirm_sz \
 572                                 (compound_encode_hdr_maxsz + \
 573                                 encode_setclientid_confirm_maxsz)
 574 #define NFS4_dec_setclientid_confirm_sz \
 575                                 (compound_decode_hdr_maxsz + \
 576                                 decode_setclientid_confirm_maxsz)
 577 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 578                                 encode_sequence_maxsz + \
 579                                 encode_putfh_maxsz + \
 580                                 encode_lock_maxsz)
 581 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 582                                 decode_sequence_maxsz + \
 583                                 decode_putfh_maxsz + \
 584                                 decode_lock_maxsz)
 585 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 586                                 encode_sequence_maxsz + \
 587                                 encode_putfh_maxsz + \
 588                                 encode_lockt_maxsz)
 589 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 590                                  decode_sequence_maxsz + \
 591                                  decode_putfh_maxsz + \
 592                                  decode_lockt_maxsz)
 593 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 594                                 encode_sequence_maxsz + \
 595                                 encode_putfh_maxsz + \
 596                                 encode_locku_maxsz)
 597 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 598                                 decode_sequence_maxsz + \
 599                                 decode_putfh_maxsz + \
 600                                 decode_locku_maxsz)
 601 #define NFS4_enc_release_lockowner_sz \
 602                                 (compound_encode_hdr_maxsz + \
 603                                  encode_lockowner_maxsz)
 604 #define NFS4_dec_release_lockowner_sz \
 605                                 (compound_decode_hdr_maxsz + \
 606                                  decode_lockowner_maxsz)
 607 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_access_maxsz + \
 611                                 encode_getattr_maxsz)
 612 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 613                                 decode_sequence_maxsz + \
 614                                 decode_putfh_maxsz + \
 615                                 decode_access_maxsz + \
 616                                 decode_getattr_maxsz)
 617 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 618                                 encode_sequence_maxsz + \
 619                                 encode_putfh_maxsz + \
 620                                 encode_getattr_maxsz + \
 621                                 encode_renew_maxsz)
 622 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 623                                 decode_sequence_maxsz + \
 624                                 decode_putfh_maxsz + \
 625                                 decode_getattr_maxsz + \
 626                                 decode_renew_maxsz)
 627 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 628                                 encode_sequence_maxsz + \
 629                                 encode_putfh_maxsz + \
 630                                 encode_lookup_maxsz + \
 631                                 encode_getattr_maxsz + \
 632                                 encode_getfh_maxsz)
 633 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_lookup_maxsz + \
 637                                 decode_getattr_maxsz + \
 638                                 decode_getfh_maxsz)
 639 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 640                                 encode_sequence_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_lookupp_maxsz + \
 643                                 encode_getattr_maxsz + \
 644                                 encode_getfh_maxsz)
 645 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 646                                 decode_sequence_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_lookupp_maxsz + \
 649                                 decode_getattr_maxsz + \
 650                                 decode_getfh_maxsz)
 651 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 652                                 encode_sequence_maxsz + \
 653                                 encode_putrootfh_maxsz + \
 654                                 encode_getattr_maxsz + \
 655                                 encode_getfh_maxsz)
 656 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 657                                 decode_sequence_maxsz + \
 658                                 decode_putrootfh_maxsz + \
 659                                 decode_getattr_maxsz + \
 660                                 decode_getfh_maxsz)
 661 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 662                                 encode_sequence_maxsz + \
 663                                 encode_putfh_maxsz + \
 664                                 encode_remove_maxsz)
 665 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 666                                 decode_sequence_maxsz + \
 667                                 decode_putfh_maxsz + \
 668                                 decode_remove_maxsz)
 669 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 670                                 encode_sequence_maxsz + \
 671                                 encode_putfh_maxsz + \
 672                                 encode_savefh_maxsz + \
 673                                 encode_putfh_maxsz + \
 674                                 encode_rename_maxsz)
 675 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_savefh_maxsz + \
 679                                 decode_putfh_maxsz + \
 680                                 decode_rename_maxsz)
 681 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 682                                 encode_sequence_maxsz + \
 683                                 encode_putfh_maxsz + \
 684                                 encode_savefh_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_link_maxsz + \
 687                                 encode_restorefh_maxsz + \
 688                                 encode_getattr_maxsz)
 689 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 690                                 decode_sequence_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_savefh_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_link_maxsz + \
 695                                 decode_restorefh_maxsz + \
 696                                 decode_getattr_maxsz)
 697 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 698                                 encode_sequence_maxsz + \
 699                                 encode_putfh_maxsz + \
 700                                 encode_symlink_maxsz + \
 701                                 encode_getattr_maxsz + \
 702                                 encode_getfh_maxsz)
 703 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 704                                 decode_sequence_maxsz + \
 705                                 decode_putfh_maxsz + \
 706                                 decode_symlink_maxsz + \
 707                                 decode_getattr_maxsz + \
 708                                 decode_getfh_maxsz)
 709 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 710                                 encode_sequence_maxsz + \
 711                                 encode_putfh_maxsz + \
 712                                 encode_create_maxsz + \
 713                                 encode_getfh_maxsz + \
 714                                 encode_getattr_maxsz)
 715 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 716                                 decode_sequence_maxsz + \
 717                                 decode_putfh_maxsz + \
 718                                 decode_create_maxsz + \
 719                                 decode_getfh_maxsz + \
 720                                 decode_getattr_maxsz)
 721 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 722                                 encode_sequence_maxsz + \
 723                                 encode_putfh_maxsz + \
 724                                 encode_getattr_maxsz)
 725 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 726                                 decode_sequence_maxsz + \
 727                                 decode_putfh_maxsz + \
 728                                 decode_getattr_maxsz)
 729 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 730                                 encode_sequence_maxsz + \
 731                                 encode_putfh_maxsz + \
 732                                 encode_statfs_maxsz)
 733 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 734                                 decode_sequence_maxsz + \
 735                                 decode_putfh_maxsz + \
 736                                 decode_statfs_maxsz)
 737 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 738                                 encode_sequence_maxsz + \
 739                                 encode_putfh_maxsz + \
 740                                 encode_getattr_maxsz)
 741 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 742                                 decode_sequence_maxsz + \
 743                                 decode_putfh_maxsz + \
 744                                 decode_getattr_maxsz)
 745 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 746                                 encode_sequence_maxsz + \
 747                                 encode_putfh_maxsz + \
 748                                 encode_layoutreturn_maxsz + \
 749                                 encode_delegreturn_maxsz + \
 750                                 encode_getattr_maxsz)
 751 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 752                                 decode_sequence_maxsz + \
 753                                 decode_putfh_maxsz + \
 754                                 decode_layoutreturn_maxsz + \
 755                                 decode_delegreturn_maxsz + \
 756                                 decode_getattr_maxsz)
 757 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 758                                 encode_sequence_maxsz + \
 759                                 encode_putfh_maxsz + \
 760                                 encode_getacl_maxsz)
 761 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 762                                 decode_sequence_maxsz + \
 763                                 decode_putfh_maxsz + \
 764                                 decode_getacl_maxsz)
 765 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 766                                 encode_sequence_maxsz + \
 767                                 encode_putfh_maxsz + \
 768                                 encode_setacl_maxsz)
 769 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 770                                 decode_sequence_maxsz + \
 771                                 decode_putfh_maxsz + \
 772                                 decode_setacl_maxsz)
 773 #define NFS4_enc_fs_locations_sz \
 774                                 (compound_encode_hdr_maxsz + \
 775                                  encode_sequence_maxsz + \
 776                                  encode_putfh_maxsz + \
 777                                  encode_lookup_maxsz + \
 778                                  encode_fs_locations_maxsz + \
 779                                  encode_renew_maxsz)
 780 #define NFS4_dec_fs_locations_sz \
 781                                 (compound_decode_hdr_maxsz + \
 782                                  decode_sequence_maxsz + \
 783                                  decode_putfh_maxsz + \
 784                                  decode_lookup_maxsz + \
 785                                  decode_fs_locations_maxsz + \
 786                                  decode_renew_maxsz)
 787 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 788                                 encode_sequence_maxsz + \
 789                                 encode_putfh_maxsz + \
 790                                 encode_secinfo_maxsz)
 791 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 792                                 decode_sequence_maxsz + \
 793                                 decode_putfh_maxsz + \
 794                                 decode_secinfo_maxsz)
 795 #define NFS4_enc_fsid_present_sz \
 796                                 (compound_encode_hdr_maxsz + \
 797                                  encode_sequence_maxsz + \
 798                                  encode_putfh_maxsz + \
 799                                  encode_getfh_maxsz + \
 800                                  encode_renew_maxsz)
 801 #define NFS4_dec_fsid_present_sz \
 802                                 (compound_decode_hdr_maxsz + \
 803                                  decode_sequence_maxsz + \
 804                                  decode_putfh_maxsz + \
 805                                  decode_getfh_maxsz + \
 806                                  decode_renew_maxsz)
 807 #if defined(CONFIG_NFS_V4_1)
 808 #define NFS4_enc_bind_conn_to_session_sz \
 809                                 (compound_encode_hdr_maxsz + \
 810                                  encode_bind_conn_to_session_maxsz)
 811 #define NFS4_dec_bind_conn_to_session_sz \
 812                                 (compound_decode_hdr_maxsz + \
 813                                  decode_bind_conn_to_session_maxsz)
 814 #define NFS4_enc_exchange_id_sz \
 815                                 (compound_encode_hdr_maxsz + \
 816                                  encode_exchange_id_maxsz)
 817 #define NFS4_dec_exchange_id_sz \
 818                                 (compound_decode_hdr_maxsz + \
 819                                  decode_exchange_id_maxsz)
 820 #define NFS4_enc_create_session_sz \
 821                                 (compound_encode_hdr_maxsz + \
 822                                  encode_create_session_maxsz)
 823 #define NFS4_dec_create_session_sz \
 824                                 (compound_decode_hdr_maxsz + \
 825                                  decode_create_session_maxsz)
 826 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 827                                          encode_destroy_session_maxsz)
 828 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 829                                          decode_destroy_session_maxsz)
 830 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 831                                          encode_destroy_clientid_maxsz)
 832 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 833                                          decode_destroy_clientid_maxsz)
 834 #define NFS4_enc_sequence_sz \
 835                                 (compound_decode_hdr_maxsz + \
 836                                  encode_sequence_maxsz)
 837 #define NFS4_dec_sequence_sz \
 838                                 (compound_decode_hdr_maxsz + \
 839                                  decode_sequence_maxsz)
 840 #endif
 841 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 842                                          encode_sequence_maxsz + \
 843                                          encode_putrootfh_maxsz + \
 844                                          encode_fsinfo_maxsz)
 845 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 846                                          decode_sequence_maxsz + \
 847                                          decode_putrootfh_maxsz + \
 848                                          decode_fsinfo_maxsz)
 849 #if defined(CONFIG_NFS_V4_1)
 850 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 851                                          encode_sequence_maxsz + \
 852                                          encode_reclaim_complete_maxsz)
 853 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 854                                          decode_sequence_maxsz + \
 855                                          decode_reclaim_complete_maxsz)
 856 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 857                                 encode_sequence_maxsz +\
 858                                 encode_getdeviceinfo_maxsz)
 859 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 860                                 decode_sequence_maxsz + \
 861                                 decode_getdeviceinfo_maxsz)
 862 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 863                                 encode_sequence_maxsz + \
 864                                 encode_putfh_maxsz +        \
 865                                 encode_layoutget_maxsz)
 866 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 867                                 decode_sequence_maxsz + \
 868                                 decode_putfh_maxsz +        \
 869                                 decode_layoutget_maxsz)
 870 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 871                                 encode_sequence_maxsz +\
 872                                 encode_putfh_maxsz + \
 873                                 encode_layoutcommit_maxsz + \
 874                                 encode_getattr_maxsz)
 875 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 876                                 decode_sequence_maxsz + \
 877                                 decode_putfh_maxsz + \
 878                                 decode_layoutcommit_maxsz + \
 879                                 decode_getattr_maxsz)
 880 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 881                                 encode_sequence_maxsz + \
 882                                 encode_putfh_maxsz + \
 883                                 encode_layoutreturn_maxsz)
 884 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 885                                 decode_sequence_maxsz + \
 886                                 decode_putfh_maxsz + \
 887                                 decode_layoutreturn_maxsz)
 888 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 889                                         encode_sequence_maxsz + \
 890                                         encode_putrootfh_maxsz +\
 891                                         encode_secinfo_no_name_maxsz)
 892 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 893                                         decode_sequence_maxsz + \
 894                                         decode_putrootfh_maxsz + \
 895                                         decode_secinfo_no_name_maxsz)
 896 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 897                                          encode_sequence_maxsz + \
 898                                          encode_test_stateid_maxsz)
 899 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 900                                          decode_sequence_maxsz + \
 901                                          decode_test_stateid_maxsz)
 902 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 903                                          encode_sequence_maxsz + \
 904                                          encode_free_stateid_maxsz)
 905 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 906                                          decode_sequence_maxsz + \
 907                                          decode_free_stateid_maxsz)
 908
 909 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 910                                       compound_encode_hdr_maxsz +
 911                                       encode_sequence_maxsz +
 912                                       encode_putfh_maxsz +
 913                                       encode_getattr_maxsz) *
 914                                      XDR_UNIT);
 915
 916 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 917                                      compound_decode_hdr_maxsz +
 918                                      decode_sequence_maxsz +
 919                                      decode_putfh_maxsz) *
 920                                     XDR_UNIT);
 921
 922 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 923                                            compound_decode_hdr_maxsz +
 924                                            decode_sequence_maxsz) *
 925                                           XDR_UNIT);
 926 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 927 #endif /* CONFIG_NFS_V4_1 */
 928
 929 static const umode_t nfs_type2fmt[] = {
 930         [NF4BAD] = 0,
 931         [NF4REG] = S_IFREG,
 932         [NF4DIR] = S_IFDIR,
 933         [NF4BLK] = S_IFBLK,
 934         [NF4CHR] = S_IFCHR,
 935         [NF4LNK] = S_IFLNK,
 936         [NF4SOCK] = S_IFSOCK,
 937         [NF4FIFO] = S_IFIFO,
 938         [NF4ATTRDIR] = 0,
 939         [NF4NAMEDATTR] = 0,
 940 };
 941
 942 struct compound_hdr {
 943         int32_t         status;
 944         uint32_t        nops;
 945         __be32 *        nops_p;
 946         uint32_t        taglen;
 947         char *          tag;
 948         uint32_t        replen;         /* expected reply words */
 949         u32             minorversion;
 950 };
 951
 952 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 953 {
 954         __be32 *p = xdr_reserve_space(xdr, nbytes);
 955         BUG_ON(!p);
 956         return p;
 957 }
 958
 959 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 960 {
 961         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 962 }
 963
 964 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 965 {
 966         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 967 }
 968
 969 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 970 {
 971         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 972 }
 973
 974 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 975 {
 976         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 977 }
 978
 979 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 980                 const __u32 *bitmap, size_t len)
 981 {
 982         ssize_t ret;
 983
 984         /* Trim empty words */
 985         while (len > 0 && bitmap[len-1] == 0)
 986                 len--;
 987         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 988         if (WARN_ON_ONCE(ret < 0))
 989                 return ret;
 990         return len;
 991 }
 992
 993 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 994                 __u32 *res, size_t len)
 995 {
 996         size_t i;
 997         __u32 tmp;
 998
 999         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1000                 len--;
1001         for (i = len; i-- > 0;) {
1002                 tmp = bitmap[i] & mask[i];
1003                 res[i] = tmp;
1004         }
1005         return len;
1006 }
1007
1008 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1009                 const struct nfs_seqid *seqid)
1010 {
1011         if (seqid != NULL)
1012                 encode_uint32(xdr, seqid->sequence->counter);
1013         else
1014                 encode_uint32(xdr, 0);
1015 }
1016
1017 static void encode_compound_hdr(struct xdr_stream *xdr,
1018                                 struct rpc_rqst *req,
1019                                 struct compound_hdr *hdr)
1020 {
1021         __be32 *p;
1022
1023         /* initialize running count of expected bytes in reply.
1024          * NOTE: the replied tag SHOULD be the same is the one sent,
1025          * but this is not required as a MUST for the server to do so. */
1026         hdr->replen = 3 + hdr->taglen;
1027
1028         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1029         encode_string(xdr, hdr->taglen, hdr->tag);
1030         p = reserve_space(xdr, 8);
1031         *p++ = cpu_to_be32(hdr->minorversion);
1032         hdr->nops_p = p;
1033         *p = cpu_to_be32(hdr->nops);
1034 }
1035
1036 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1037                 uint32_t replen,
1038                 struct compound_hdr *hdr)
1039 {
1040         encode_uint32(xdr, op);
1041         hdr->nops++;
1042         hdr->replen += replen;
1043 }
1044
1045 static void encode_nops(struct compound_hdr *hdr)
1046 {
1047         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1048         *hdr->nops_p = htonl(hdr->nops);
1049 }
1050
1051 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1052 {
1053         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1054 }
1055
1056 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1057 {
1058         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1059 }
1060
1061 static __be32 *
1062 xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1063 {
1064         p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1065         *p++ = cpu_to_be32(t->tv_nsec);
1066         return p;
1067 }
1068
1069 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1070                                 const struct nfs4_label *label,
1071                                 const umode_t *umask,
1072                                 const struct nfs_server *server,
1073                                 const uint32_t attrmask[])
1074 {
1075         char owner_name[IDMAP_NAMESZ];
1076         char owner_group[IDMAP_NAMESZ];
1077         int owner_namelen = 0;
1078         int owner_grouplen = 0;
1079         __be32 *p;
1080         uint32_t len = 0;
1081         uint32_t bmval[3] = { 0 };
1082
1083         /*
1084          * We reserve enough space to write the entire attribute buffer at once.
1085          */
1086         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1087                 bmval[0] |= FATTR4_WORD0_SIZE;
1088                 len += 8;
1089         }
1090         if (iap->ia_valid & ATTR_MODE) {
1091                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1092                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1093                         len += 8;
1094                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1095                         bmval[1] |= FATTR4_WORD1_MODE;
1096                         len += 4;
1097                 }
1098         }
1099         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1100                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1101                 if (owner_namelen < 0) {
1102                         dprintk("nfs: couldn't resolve uid %d to string\n",
1103                                         from_kuid(&init_user_ns, iap->ia_uid));
1104                         /* XXX */
1105                         strcpy(owner_name, "nobody");
1106                         owner_namelen = sizeof("nobody") - 1;
1107                         /* goto out; */
1108                 }
1109                 bmval[1] |= FATTR4_WORD1_OWNER;
1110                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1111         }
1112         if ((iap->ia_valid & ATTR_GID) &&
1113            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1114                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1115                 if (owner_grouplen < 0) {
1116                         dprintk("nfs: couldn't resolve gid %d to string\n",
1117                                         from_kgid(&init_user_ns, iap->ia_gid));
1118                         strcpy(owner_group, "nobody");
1119                         owner_grouplen = sizeof("nobody") - 1;
1120                         /* goto out; */
1121                 }
1122                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1123                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1124         }
1125         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1126                 if (iap->ia_valid & ATTR_ATIME_SET) {
1127                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1128                         len += 4 + (nfstime4_maxsz << 2);
1129                 } else if (iap->ia_valid & ATTR_ATIME) {
1130                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1131                         len += 4;
1132                 }
1133         }
1134         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1135                 if (iap->ia_valid & ATTR_MTIME_SET) {
1136                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1137                         len += 4 + (nfstime4_maxsz << 2);
1138                 } else if (iap->ia_valid & ATTR_MTIME) {
1139                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1140                         len += 4;
1141                 }
1142         }
1143
1144         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1145                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1146                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1147         }
1148
1149         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1150         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1151
1152         if (bmval[0] & FATTR4_WORD0_SIZE)
1153                 p = xdr_encode_hyper(p, iap->ia_size);
1154         if (bmval[1] & FATTR4_WORD1_MODE)
1155                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1156         if (bmval[1] & FATTR4_WORD1_OWNER)
1157                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1158         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1159                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1160         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1161                 if (iap->ia_valid & ATTR_ATIME_SET) {
1162                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1163                         p = xdr_encode_nfstime4(p, &iap->ia_atime);
1164                 } else
1165                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1166         }
1167         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1168                 if (iap->ia_valid & ATTR_MTIME_SET) {
1169                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1170                         p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1171                 } else
1172                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1173         }
1174         if (label && (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 + 1);
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 + 1);
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 #endif
2960
2961 /*
2962  * a GET_LEASE_TIME request
2963  */
2964 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2965                                         struct xdr_stream *xdr,
2966                                         const void *data)
2967 {
2968         const struct nfs4_get_lease_time_args *args = data;
2969         struct compound_hdr hdr = {
2970                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2971         };
2972         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2973
2974         encode_compound_hdr(xdr, req, &hdr);
2975         encode_sequence(xdr, &args->la_seq_args, &hdr);
2976         encode_putrootfh(xdr, &hdr);
2977         encode_fsinfo(xdr, lease_bitmap, &hdr);
2978         encode_nops(&hdr);
2979 }
2980
2981 #ifdef CONFIG_NFS_V4_1
2982
2983 /*
2984  * a RECLAIM_COMPLETE request
2985  */
2986 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2987                                           struct xdr_stream *xdr,
2988                                           const void *data)
2989 {
2990         const struct nfs41_reclaim_complete_args *args = data;
2991         struct compound_hdr hdr = {
2992                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2993         };
2994
2995         encode_compound_hdr(xdr, req, &hdr);
2996         encode_sequence(xdr, &args->seq_args, &hdr);
2997         encode_reclaim_complete(xdr, args, &hdr);
2998         encode_nops(&hdr);
2999 }
3000
3001 /*
3002  * Encode GETDEVICEINFO request
3003  */
3004 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3005                                        struct xdr_stream *xdr,
3006                                        const void *data)
3007 {
3008         const struct nfs4_getdeviceinfo_args *args = data;
3009         struct compound_hdr hdr = {
3010                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3011         };
3012
3013         encode_compound_hdr(xdr, req, &hdr);
3014         encode_sequence(xdr, &args->seq_args, &hdr);
3015         encode_getdeviceinfo(xdr, args, &hdr);
3016
3017         /* set up reply kvec. Subtract notification bitmap max size (2)
3018          * so that notification bitmap is put in xdr_buf tail */
3019         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3020                                 args->pdev->pglen, hdr.replen - 2);
3021         encode_nops(&hdr);
3022 }
3023
3024 /*
3025  *  Encode LAYOUTGET request
3026  */
3027 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3028                                    struct xdr_stream *xdr,
3029                                    const void *data)
3030 {
3031         const struct nfs4_layoutget_args *args = data;
3032         struct compound_hdr hdr = {
3033                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3034         };
3035
3036         encode_compound_hdr(xdr, req, &hdr);
3037         encode_sequence(xdr, &args->seq_args, &hdr);
3038         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3039         encode_layoutget(xdr, args, &hdr);
3040
3041         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3042                                 args->layout.pglen, hdr.replen);
3043         encode_nops(&hdr);
3044 }
3045
3046 /*
3047  *  Encode LAYOUTCOMMIT request
3048  */
3049 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3050                                       struct xdr_stream *xdr,
3051                                       const void *priv)
3052 {
3053         const struct nfs4_layoutcommit_args *args = priv;
3054         struct nfs4_layoutcommit_data *data =
3055                 container_of(args, struct nfs4_layoutcommit_data, args);
3056         struct compound_hdr hdr = {
3057                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3058         };
3059
3060         encode_compound_hdr(xdr, req, &hdr);
3061         encode_sequence(xdr, &args->seq_args, &hdr);
3062         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3063         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3064         encode_getfattr(xdr, args->bitmask, &hdr);
3065         encode_nops(&hdr);
3066 }
3067
3068 /*
3069  * Encode LAYOUTRETURN request
3070  */
3071 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3072                                       struct xdr_stream *xdr,
3073                                       const void *data)
3074 {
3075         const struct nfs4_layoutreturn_args *args = data;
3076         struct compound_hdr hdr = {
3077                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3078         };
3079
3080         encode_compound_hdr(xdr, req, &hdr);
3081         encode_sequence(xdr, &args->seq_args, &hdr);
3082         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3083         encode_layoutreturn(xdr, args, &hdr);
3084         encode_nops(&hdr);
3085 }
3086
3087 /*
3088  * Encode SECINFO_NO_NAME request
3089  */
3090 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3091                                         struct xdr_stream *xdr,
3092                                         const void *data)
3093 {
3094         const struct nfs41_secinfo_no_name_args *args = data;
3095         struct compound_hdr hdr = {
3096                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3097         };
3098
3099         encode_compound_hdr(xdr, req, &hdr);
3100         encode_sequence(xdr, &args->seq_args, &hdr);
3101         encode_putrootfh(xdr, &hdr);
3102         encode_secinfo_no_name(xdr, args, &hdr);
3103         encode_nops(&hdr);
3104 }
3105
3106 /*
3107  *  Encode TEST_STATEID request
3108  */
3109 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3110                                       struct xdr_stream *xdr,
3111                                       const void *data)
3112 {
3113         const struct nfs41_test_stateid_args *args = data;
3114         struct compound_hdr hdr = {
3115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3116         };
3117
3118         encode_compound_hdr(xdr, req, &hdr);
3119         encode_sequence(xdr, &args->seq_args, &hdr);
3120         encode_test_stateid(xdr, args, &hdr);
3121         encode_nops(&hdr);
3122 }
3123
3124 /*
3125  *  Encode FREE_STATEID request
3126  */
3127 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3128                                      struct xdr_stream *xdr,
3129                                      const void *data)
3130 {
3131         const struct nfs41_free_stateid_args *args = data;
3132         struct compound_hdr hdr = {
3133                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3134         };
3135
3136         encode_compound_hdr(xdr, req, &hdr);
3137         encode_sequence(xdr, &args->seq_args, &hdr);
3138         encode_free_stateid(xdr, args, &hdr);
3139         encode_nops(&hdr);
3140 }
3141 #endif /* CONFIG_NFS_V4_1 */
3142
3143 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3144 {
3145         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3146                         NFS4_OPAQUE_LIMIT);
3147         if (unlikely(ret < 0))
3148                 return -EIO;
3149         *len = ret;
3150         return 0;
3151 }
3152
3153 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3154 {
3155         __be32 *p;
3156
3157         p = xdr_inline_decode(xdr, 8);
3158         if (unlikely(!p))
3159                 return -EIO;
3160         hdr->status = be32_to_cpup(p++);
3161         hdr->taglen = be32_to_cpup(p);
3162
3163         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3164         if (unlikely(!p))
3165                 return -EIO;
3166         hdr->tag = (char *)p;
3167         p += XDR_QUADLEN(hdr->taglen);
3168         hdr->nops = be32_to_cpup(p);
3169         if (unlikely(hdr->nops < 1))
3170                 return nfs4_stat_to_errno(hdr->status);
3171         return 0;
3172 }
3173
3174 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3175                 int *nfs_retval)
3176 {
3177         __be32 *p;
3178         uint32_t opnum;
3179         int32_t nfserr;
3180
3181         p = xdr_inline_decode(xdr, 8);
3182         if (unlikely(!p))
3183                 goto out_overflow;
3184         opnum = be32_to_cpup(p++);
3185         if (unlikely(opnum != expected))
3186                 goto out_bad_operation;
3187         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3188                 goto out_status;
3189         *nfs_retval = 0;
3190         return true;
3191 out_status:
3192         nfserr = be32_to_cpup(p);
3193         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3194         *nfs_retval = nfs4_stat_to_errno(nfserr);
3195         return true;
3196 out_bad_operation:
3197         dprintk("nfs: Server returned operation"
3198                 " %d but we issued a request for %d\n",
3199                         opnum, expected);
3200         *nfs_retval = -EREMOTEIO;
3201         return false;
3202 out_overflow:
3203         *nfs_retval = -EIO;
3204         return false;
3205 }
3206
3207 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3208 {
3209         int retval;
3210
3211         __decode_op_hdr(xdr, expected, &retval);
3212         return retval;
3213 }
3214
3215 /* Dummy routine */
3216 static int decode_ace(struct xdr_stream *xdr, void *ace)
3217 {
3218         __be32 *p;
3219         unsigned int strlen;
3220         char *str;
3221
3222         p = xdr_inline_decode(xdr, 12);
3223         if (unlikely(!p))
3224                 return -EIO;
3225         return decode_opaque_inline(xdr, &strlen, &str);
3226 }
3227
3228 static ssize_t
3229 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3230 {
3231         ssize_t ret;
3232
3233         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3234         if (likely(ret >= 0))
3235                 return ret;
3236         if (ret != -EMSGSIZE)
3237                 return -EIO;
3238         return sz;
3239 }
3240
3241 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3242 {
3243         ssize_t ret;
3244         ret = decode_bitmap4(xdr, bitmap, 3);
3245         return ret < 0 ? ret : 0;
3246 }
3247
3248 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3249 {
3250         __be32 *p;
3251
3252         p = xdr_inline_decode(xdr, 4);
3253         if (unlikely(!p))
3254                 return -EIO;
3255         *attrlen = be32_to_cpup(p);
3256         *savep = xdr_stream_pos(xdr);
3257         return 0;
3258 }
3259
3260 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3261 {
3262         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3263                 int ret;
3264                 ret = decode_attr_bitmap(xdr, bitmask);
3265                 if (unlikely(ret < 0))
3266                         return ret;
3267                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3268         } else
3269                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3270         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3271                 bitmask[0], bitmask[1], bitmask[2]);
3272         return 0;
3273 }
3274
3275 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3276 {
3277         __be32 *p;
3278         int ret = 0;
3279
3280         *type = 0;
3281         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3282                 return -EIO;
3283         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3284                 p = xdr_inline_decode(xdr, 4);
3285                 if (unlikely(!p))
3286                         return -EIO;
3287                 *type = be32_to_cpup(p);
3288                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3289                         dprintk("%s: bad type %d\n", __func__, *type);
3290                         return -EIO;
3291                 }
3292                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3293                 ret = NFS_ATTR_FATTR_TYPE;
3294         }
3295         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3296         return ret;
3297 }
3298
3299 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3300                                       uint32_t *bitmap, uint32_t *type)
3301 {
3302         __be32 *p;
3303
3304         *type = 0;
3305         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3306                 return -EIO;
3307         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3308                 p = xdr_inline_decode(xdr, 4);
3309                 if (unlikely(!p))
3310                         return -EIO;
3311                 *type = be32_to_cpup(p);
3312                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3313         }
3314         dprintk("%s: expire type=0x%x\n", __func__, *type);
3315         return 0;
3316 }
3317
3318 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3319 {
3320         __be32 *p;
3321         int ret = 0;
3322
3323         *change = 0;
3324         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3325                 return -EIO;
3326         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3327                 p = xdr_inline_decode(xdr, 8);
3328                 if (unlikely(!p))
3329                         return -EIO;
3330                 xdr_decode_hyper(p, change);
3331                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3332                 ret = NFS_ATTR_FATTR_CHANGE;
3333         }
3334         dprintk("%s: change attribute=%Lu\n", __func__,
3335                         (unsigned long long)*change);
3336         return ret;
3337 }
3338
3339 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3340 {
3341         __be32 *p;
3342         int ret = 0;
3343
3344         *size = 0;
3345         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3346                 return -EIO;
3347         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3348                 p = xdr_inline_decode(xdr, 8);
3349                 if (unlikely(!p))
3350                         return -EIO;
3351                 xdr_decode_hyper(p, size);
3352                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3353                 ret = NFS_ATTR_FATTR_SIZE;
3354         }
3355         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3356         return ret;
3357 }
3358
3359 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3360 {
3361         __be32 *p;
3362
3363         *res = 0;
3364         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3365                 return -EIO;
3366         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3367                 p = xdr_inline_decode(xdr, 4);
3368                 if (unlikely(!p))
3369                         return -EIO;
3370                 *res = be32_to_cpup(p);
3371                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3372         }
3373         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3374         return 0;
3375 }
3376
3377 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3378 {
3379         __be32 *p;
3380
3381         *res = 0;
3382         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3383                 return -EIO;
3384         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3385                 p = xdr_inline_decode(xdr, 4);
3386                 if (unlikely(!p))
3387                         return -EIO;
3388                 *res = be32_to_cpup(p);
3389                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3390         }
3391         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3392         return 0;
3393 }
3394
3395 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3396 {
3397         __be32 *p;
3398         int ret = 0;
3399
3400         fsid->major = 0;
3401         fsid->minor = 0;
3402         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3403                 return -EIO;
3404         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3405                 p = xdr_inline_decode(xdr, 16);
3406                 if (unlikely(!p))
3407                         return -EIO;
3408                 p = xdr_decode_hyper(p, &fsid->major);
3409                 xdr_decode_hyper(p, &fsid->minor);
3410                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3411                 ret = NFS_ATTR_FATTR_FSID;
3412         }
3413         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3414                         (unsigned long long)fsid->major,
3415                         (unsigned long long)fsid->minor);
3416         return ret;
3417 }
3418
3419 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3420 {
3421         __be32 *p;
3422
3423         *res = 60;
3424         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3425                 return -EIO;
3426         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3427                 p = xdr_inline_decode(xdr, 4);
3428                 if (unlikely(!p))
3429                         return -EIO;
3430                 *res = be32_to_cpup(p);
3431                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3432         }
3433         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3434         return 0;
3435 }
3436
3437 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3438 {
3439         __be32 *p;
3440
3441         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3442                 return -EIO;
3443         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3444                 p = xdr_inline_decode(xdr, 4);
3445                 if (unlikely(!p))
3446                         return -EIO;
3447                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3448                 *res = -be32_to_cpup(p);
3449         }
3450         return 0;
3451 }
3452
3453 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3454                                  uint32_t *bitmap, uint32_t *bitmask)
3455 {
3456         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3457                 int ret;
3458                 ret = decode_attr_bitmap(xdr, bitmask);
3459                 if (unlikely(ret < 0))
3460                         return ret;
3461                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3462         } else
3463                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3464         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3465                 bitmask[0], bitmask[1], bitmask[2]);
3466         return 0;
3467 }
3468
3469 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3470 {
3471         __be32 *p;
3472         u32 len;
3473
3474         if (fh != NULL)
3475                 memset(fh, 0, sizeof(*fh));
3476
3477         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3478                 return -EIO;
3479         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3480                 p = xdr_inline_decode(xdr, 4);
3481                 if (unlikely(!p))
3482                         return -EIO;
3483                 len = be32_to_cpup(p);
3484                 if (len > NFS4_FHSIZE)
3485                         return -EIO;
3486                 p = xdr_inline_decode(xdr, len);
3487                 if (unlikely(!p))
3488                         return -EIO;
3489                 if (fh != NULL) {
3490                         memcpy(fh->data, p, len);
3491                         fh->size = len;
3492                 }
3493                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3494         }
3495         return 0;
3496 }
3497
3498 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3499 {
3500         __be32 *p;
3501
3502         *res = 0;
3503         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3504                 return -EIO;
3505         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3506                 p = xdr_inline_decode(xdr, 4);
3507                 if (unlikely(!p))
3508                         return -EIO;
3509                 *res = be32_to_cpup(p);
3510                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3511         }
3512         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3513         return 0;
3514 }
3515
3516 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3517 {
3518         __be32 *p;
3519         int ret = 0;
3520
3521         *fileid = 0;
3522         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3523                 return -EIO;
3524         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3525                 p = xdr_inline_decode(xdr, 8);
3526                 if (unlikely(!p))
3527                         return -EIO;
3528                 xdr_decode_hyper(p, fileid);
3529                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3530                 ret = NFS_ATTR_FATTR_FILEID;
3531         }
3532         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3533         return ret;
3534 }
3535
3536 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3537 {
3538         __be32 *p;
3539         int ret = 0;
3540
3541         *fileid = 0;
3542         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3543                 return -EIO;
3544         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3545                 p = xdr_inline_decode(xdr, 8);
3546                 if (unlikely(!p))
3547                         return -EIO;
3548                 xdr_decode_hyper(p, fileid);
3549                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3550                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3551         }
3552         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3553         return ret;
3554 }
3555
3556 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3557 {
3558         __be32 *p;
3559         int status = 0;
3560
3561         *res = 0;
3562         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3563                 return -EIO;
3564         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3565                 p = xdr_inline_decode(xdr, 8);
3566                 if (unlikely(!p))
3567                         return -EIO;
3568                 xdr_decode_hyper(p, res);
3569                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3570         }
3571         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3572         return status;
3573 }
3574
3575 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3576 {
3577         __be32 *p;
3578         int status = 0;
3579
3580         *res = 0;
3581         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3582                 return -EIO;
3583         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3584                 p = xdr_inline_decode(xdr, 8);
3585                 if (unlikely(!p))
3586                         return -EIO;
3587                 xdr_decode_hyper(p, res);
3588                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3589         }
3590         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3591         return status;
3592 }
3593
3594 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3595 {
3596         __be32 *p;
3597         int status = 0;
3598
3599         *res = 0;
3600         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3601                 return -EIO;
3602         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3603                 p = xdr_inline_decode(xdr, 8);
3604                 if (unlikely(!p))
3605                         return -EIO;
3606                 xdr_decode_hyper(p, res);
3607                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3608         }
3609         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3610         return status;
3611 }
3612
3613 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3614 {
3615         u32 n;
3616         __be32 *p;
3617         int status = 0;
3618
3619         p = xdr_inline_decode(xdr, 4);
3620         if (unlikely(!p))
3621                 return -EIO;
3622         n = be32_to_cpup(p);
3623         if (n == 0)
3624                 goto root_path;
3625         dprintk("pathname4: ");
3626         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3627                 dprintk("cannot parse %d components in path\n", n);
3628                 goto out_eio;
3629         }
3630         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3631                 struct nfs4_string *component = &path->components[path->ncomponents];
3632                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3633                 if (unlikely(status != 0))
3634                         goto out_eio;
3635                 ifdebug (XDR)
3636                         pr_cont("%s%.*s ",
3637                                 (path->ncomponents != n ? "/ " : ""),
3638                                 component->len, component->data);
3639         }
3640 out:
3641         return status;
3642 root_path:
3643 /* a root pathname is sent as a zero component4 */
3644         path->ncomponents = 1;
3645         path->components[0].len=0;
3646         path->components[0].data=NULL;
3647         dprintk("pathname4: /\n");
3648         goto out;
3649 out_eio:
3650         dprintk(" status %d", status);
3651         status = -EIO;
3652         goto out;
3653 }
3654
3655 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3656 {
3657         int n;
3658         __be32 *p;
3659         int status = -EIO;
3660
3661         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3662                 goto out;
3663         status = 0;
3664         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3665                 goto out;
3666         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3667         status = -EIO;
3668         /* Ignore borken servers that return unrequested attrs */
3669         if (unlikely(res == NULL))
3670                 goto out;
3671         dprintk("%s: fsroot:\n", __func__);
3672         status = decode_pathname(xdr, &res->fs_path);
3673         if (unlikely(status != 0))
3674                 goto out;
3675         p = xdr_inline_decode(xdr, 4);
3676         if (unlikely(!p))
3677                 goto out_eio;
3678         n = be32_to_cpup(p);
3679         if (n <= 0)
3680                 goto out_eio;
3681         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3682                 u32 m;
3683                 struct nfs4_fs_location *loc;
3684
3685                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3686                         break;
3687                 loc = &res->locations[res->nlocations];
3688                 p = xdr_inline_decode(xdr, 4);
3689                 if (unlikely(!p))
3690                         goto out_eio;
3691                 m = be32_to_cpup(p);
3692
3693                 dprintk("%s: servers:\n", __func__);
3694                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3695                         struct nfs4_string *server;
3696
3697                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3698                                 unsigned int i;
3699                                 dprintk("%s: using first %u of %u servers "
3700                                         "returned for location %u\n",
3701                                                 __func__,
3702                                                 NFS4_FS_LOCATION_MAXSERVERS,
3703                                                 m, res->nlocations);
3704                                 for (i = loc->nservers; i < m; i++) {
3705                                         unsigned int len;
3706                                         char *data;
3707                                         status = decode_opaque_inline(xdr, &len, &data);
3708                                         if (unlikely(status != 0))
3709                                                 goto out_eio;
3710                                 }
3711                                 break;
3712                         }
3713                         server = &loc->servers[loc->nservers];
3714                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3715                         if (unlikely(status != 0))
3716                                 goto out_eio;
3717                         dprintk("%s ", server->data);
3718                 }
3719                 status = decode_pathname(xdr, &loc->rootpath);
3720                 if (unlikely(status != 0))
3721                         goto out_eio;
3722         }
3723         if (res->nlocations != 0)
3724                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3725 out:
3726         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3727         return status;
3728 out_eio:
3729         status = -EIO;
3730         goto out;
3731 }
3732
3733 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3734 {
3735         __be32 *p;
3736         int status = 0;
3737
3738         *res = 0;
3739         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3740                 return -EIO;
3741         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3742                 p = xdr_inline_decode(xdr, 8);
3743                 if (unlikely(!p))
3744                         return -EIO;
3745                 xdr_decode_hyper(p, res);
3746                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3747         }
3748         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3749         return status;
3750 }
3751
3752 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3753 {
3754         __be32 *p;
3755         int status = 0;
3756
3757         *maxlink = 1;
3758         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3759                 return -EIO;
3760         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3761                 p = xdr_inline_decode(xdr, 4);
3762                 if (unlikely(!p))
3763                         return -EIO;
3764                 *maxlink = be32_to_cpup(p);
3765                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3766         }
3767         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3768         return status;
3769 }
3770
3771 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3772 {
3773         __be32 *p;
3774         int status = 0;
3775
3776         *maxname = 1024;
3777         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3778                 return -EIO;
3779         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3780                 p = xdr_inline_decode(xdr, 4);
3781                 if (unlikely(!p))
3782                         return -EIO;
3783                 *maxname = be32_to_cpup(p);
3784                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3785         }
3786         dprintk("%s: maxname=%u\n", __func__, *maxname);
3787         return status;
3788 }
3789
3790 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3791 {
3792         __be32 *p;
3793         int status = 0;
3794
3795         *res = 1024;
3796         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3797                 return -EIO;
3798         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3799                 uint64_t maxread;
3800                 p = xdr_inline_decode(xdr, 8);
3801                 if (unlikely(!p))
3802                         return -EIO;
3803                 xdr_decode_hyper(p, &maxread);
3804                 if (maxread > 0x7FFFFFFF)
3805                         maxread = 0x7FFFFFFF;
3806                 *res = (uint32_t)maxread;
3807                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3808         }
3809         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3810         return status;
3811 }
3812
3813 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3814 {
3815         __be32 *p;
3816         int status = 0;
3817
3818         *res = 1024;
3819         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3820                 return -EIO;
3821         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3822                 uint64_t maxwrite;
3823                 p = xdr_inline_decode(xdr, 8);
3824                 if (unlikely(!p))
3825                         return -EIO;
3826                 xdr_decode_hyper(p, &maxwrite);
3827                 if (maxwrite > 0x7FFFFFFF)
3828                         maxwrite = 0x7FFFFFFF;
3829                 *res = (uint32_t)maxwrite;
3830                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3831         }
3832         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3833         return status;
3834 }
3835
3836 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3837 {
3838         uint32_t tmp;
3839         __be32 *p;
3840         int ret = 0;
3841
3842         *mode = 0;
3843         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3844                 return -EIO;
3845         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3846                 p = xdr_inline_decode(xdr, 4);
3847                 if (unlikely(!p))
3848                         return -EIO;
3849                 tmp = be32_to_cpup(p);
3850                 *mode = tmp & ~S_IFMT;
3851                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3852                 ret = NFS_ATTR_FATTR_MODE;
3853         }
3854         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3855         return ret;
3856 }
3857
3858 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3859 {
3860         __be32 *p;
3861         int ret = 0;
3862
3863         *nlink = 1;
3864         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3865                 return -EIO;
3866         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3867                 p = xdr_inline_decode(xdr, 4);
3868                 if (unlikely(!p))
3869                         return -EIO;
3870                 *nlink = be32_to_cpup(p);
3871                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3872                 ret = NFS_ATTR_FATTR_NLINK;
3873         }
3874         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3875         return ret;
3876 }
3877
3878 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3879                 struct nfs4_string *name, gfp_t gfp_flags)
3880 {
3881         ssize_t ret;
3882
3883         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3884                         XDR_MAX_NETOBJ, gfp_flags);
3885         name->len = 0;
3886         if (ret > 0)
3887                 name->len = ret;
3888         return ret;
3889 }
3890
3891 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3892                 const struct nfs_server *server, kuid_t *uid,
3893                 struct nfs4_string *owner_name)
3894 {
3895         ssize_t len;
3896         char *p;
3897
3898         *uid = make_kuid(&init_user_ns, -2);
3899         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3900                 return -EIO;
3901         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3902                 return 0;
3903         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3904
3905         if (owner_name != NULL) {
3906                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3907                 if (len <= 0)
3908                         goto out;
3909                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3910                 return NFS_ATTR_FATTR_OWNER_NAME;
3911         } else {
3912                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3913                                 XDR_MAX_NETOBJ);
3914                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3915                         goto out;
3916                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3917                 return NFS_ATTR_FATTR_OWNER;
3918         }
3919 out:
3920         if (len == -EBADMSG)
3921                 return -EIO;
3922         return 0;
3923 }
3924
3925 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3926                 const struct nfs_server *server, kgid_t *gid,
3927                 struct nfs4_string *group_name)
3928 {
3929         ssize_t len;
3930         char *p;
3931
3932         *gid = make_kgid(&init_user_ns, -2);
3933         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3934                 return -EIO;
3935         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3936                 return 0;
3937         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3938
3939         if (group_name != NULL) {
3940                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3941                 if (len <= 0)
3942                         goto out;
3943                 dprintk("%s: name=%s\n", __func__, group_name->data);
3944                 return NFS_ATTR_FATTR_GROUP_NAME;
3945         } else {
3946                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3947                                 XDR_MAX_NETOBJ);
3948                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3949                         goto out;
3950                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3951                 return NFS_ATTR_FATTR_GROUP;
3952         }
3953 out:
3954         if (len == -EBADMSG)
3955                 return -EIO;
3956         return 0;
3957 }
3958
3959 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3960 {
3961         uint32_t major = 0, minor = 0;
3962         __be32 *p;
3963         int ret = 0;
3964
3965         *rdev = MKDEV(0,0);
3966         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3967                 return -EIO;
3968         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3969                 dev_t tmp;
3970
3971                 p = xdr_inline_decode(xdr, 8);
3972                 if (unlikely(!p))
3973                         return -EIO;
3974                 major = be32_to_cpup(p++);
3975                 minor = be32_to_cpup(p);
3976                 tmp = MKDEV(major, minor);
3977                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3978                         *rdev = tmp;
3979                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3980                 ret = NFS_ATTR_FATTR_RDEV;
3981         }
3982         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3983         return ret;
3984 }
3985
3986 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3987 {
3988         __be32 *p;
3989         int status = 0;
3990
3991         *res = 0;
3992         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3993                 return -EIO;
3994         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3995                 p = xdr_inline_decode(xdr, 8);
3996                 if (unlikely(!p))
3997                         return -EIO;
3998                 xdr_decode_hyper(p, res);
3999                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4000         }
4001         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4002         return status;
4003 }
4004
4005 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4006 {
4007         __be32 *p;
4008         int status = 0;
4009
4010         *res = 0;
4011         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4012                 return -EIO;
4013         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4014                 p = xdr_inline_decode(xdr, 8);
4015                 if (unlikely(!p))
4016                         return -EIO;
4017                 xdr_decode_hyper(p, res);
4018                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4019         }
4020         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4021         return status;
4022 }
4023
4024 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4025 {
4026         __be32 *p;
4027         int status = 0;
4028
4029         *res = 0;
4030         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4031                 return -EIO;
4032         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4033                 p = xdr_inline_decode(xdr, 8);
4034                 if (unlikely(!p))
4035                         return -EIO;
4036                 xdr_decode_hyper(p, res);
4037                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4038         }
4039         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4040         return status;
4041 }
4042
4043 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4044 {
4045         __be32 *p;
4046         int ret = 0;
4047
4048         *used = 0;
4049         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4050                 return -EIO;
4051         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4052                 p = xdr_inline_decode(xdr, 8);
4053                 if (unlikely(!p))
4054                         return -EIO;
4055                 xdr_decode_hyper(p, used);
4056                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4057                 ret = NFS_ATTR_FATTR_SPACE_USED;
4058         }
4059         dprintk("%s: space used=%Lu\n", __func__,
4060                         (unsigned long long)*used);
4061         return ret;
4062 }
4063
4064 static __be32 *
4065 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4066 {
4067         __u64 sec;
4068
4069         p = xdr_decode_hyper(p, &sec);
4070         t-> tv_sec = sec;
4071         t->tv_nsec = be32_to_cpup(p++);
4072         return p;
4073 }
4074
4075 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4076 {
4077         __be32 *p;
4078
4079         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4080         if (unlikely(!p))
4081                 return -EIO;
4082         xdr_decode_nfstime4(p, time);
4083         return 0;
4084 }
4085
4086 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4087 {
4088         int status = 0;
4089
4090         time->tv_sec = 0;
4091         time->tv_nsec = 0;
4092         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4093                 return -EIO;
4094         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4095                 status = decode_attr_time(xdr, time);
4096                 if (status == 0)
4097                         status = NFS_ATTR_FATTR_ATIME;
4098                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4099         }
4100         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4101         return status;
4102 }
4103
4104 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4105 {
4106         int status = 0;
4107
4108         time->tv_sec = 0;
4109         time->tv_nsec = 0;
4110         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4111                 return -EIO;
4112         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4113                 status = decode_attr_time(xdr, time);
4114                 if (status == 0)
4115                         status = NFS_ATTR_FATTR_CTIME;
4116                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4117         }
4118         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4119         return status;
4120 }
4121
4122 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4123                                   struct timespec64 *time)
4124 {
4125         int status = 0;
4126
4127         time->tv_sec = 0;
4128         time->tv_nsec = 0;
4129         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4130                 return -EIO;
4131         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4132                 status = decode_attr_time(xdr, time);
4133                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4134         }
4135         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4136                 (long)time->tv_nsec);
4137         return status;
4138 }
4139
4140 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4141                                         struct nfs4_label *label)
4142 {
4143         uint32_t pi = 0;
4144         uint32_t lfs = 0;
4145         __u32 len;
4146         __be32 *p;
4147         int status = 0;
4148
4149         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4150                 return -EIO;
4151         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4152                 p = xdr_inline_decode(xdr, 4);
4153                 if (unlikely(!p))
4154                         return -EIO;
4155                 lfs = be32_to_cpup(p++);
4156                 p = xdr_inline_decode(xdr, 4);
4157                 if (unlikely(!p))
4158                         return -EIO;
4159                 pi = be32_to_cpup(p++);
4160                 p = xdr_inline_decode(xdr, 4);
4161                 if (unlikely(!p))
4162                         return -EIO;
4163                 len = be32_to_cpup(p++);
4164                 p = xdr_inline_decode(xdr, len);
4165                 if (unlikely(!p))
4166                         return -EIO;
4167                 if (len < NFS4_MAXLABELLEN) {
4168                         if (label) {
4169                                 memcpy(label->label, p, len);
4170                                 label->len = len;
4171                                 label->pi = pi;
4172                                 label->lfs = lfs;
4173                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4174                         }
4175                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4176                 } else
4177                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4178                                         __func__, len);
4179         }
4180         if (label && label->label)
4181                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4182                         (char *)label->label, label->len, label->pi, label->lfs);
4183         return status;
4184 }
4185
4186 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4187 {
4188         int status = 0;
4189
4190         time->tv_sec = 0;
4191         time->tv_nsec = 0;
4192         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4193                 return -EIO;
4194         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4195                 status = decode_attr_time(xdr, time);
4196                 if (status == 0)
4197                         status = NFS_ATTR_FATTR_MTIME;
4198                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4199         }
4200         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4201         return status;
4202 }
4203
4204 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4205 {
4206         unsigned int attrwords = XDR_QUADLEN(attrlen);
4207         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4208
4209         if (unlikely(attrwords != nwords)) {
4210                 dprintk("%s: server returned incorrect attribute length: "
4211                         "%u %c %u\n",
4212                                 __func__,
4213                                 attrwords << 2,
4214                                 (attrwords < nwords) ? '<' : '>',
4215                                 nwords << 2);
4216                 return -EIO;
4217         }
4218         return 0;
4219 }
4220
4221 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4222 {
4223         __be32 *p;
4224
4225         p = xdr_inline_decode(xdr, 20);
4226         if (unlikely(!p))
4227                 return -EIO;
4228         cinfo->atomic = be32_to_cpup(p++);
4229         p = xdr_decode_hyper(p, &cinfo->before);
4230         xdr_decode_hyper(p, &cinfo->after);
4231         return 0;
4232 }
4233
4234 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4235 {
4236         __be32 *p;
4237         uint32_t supp, acc;
4238         int status;
4239
4240         status = decode_op_hdr(xdr, OP_ACCESS);
4241         if (status)
4242                 return status;
4243         p = xdr_inline_decode(xdr, 8);
4244         if (unlikely(!p))
4245                 return -EIO;
4246         supp = be32_to_cpup(p++);
4247         acc = be32_to_cpup(p);
4248         *supported = supp;
4249         *access = acc;
4250         return 0;
4251 }
4252
4253 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4254 {
4255         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4256         if (unlikely(ret < 0))
4257                 return -EIO;
4258         return 0;
4259 }
4260
4261 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4262 {
4263         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4264 }
4265
4266 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4267 {
4268         stateid->type = NFS4_OPEN_STATEID_TYPE;
4269         return decode_stateid(xdr, stateid);
4270 }
4271
4272 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4273 {
4274         stateid->type = NFS4_LOCK_STATEID_TYPE;
4275         return decode_stateid(xdr, stateid);
4276 }
4277
4278 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4279 {
4280         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4281         return decode_stateid(xdr, stateid);
4282 }
4283
4284 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4285 {
4286         nfs4_stateid dummy;
4287
4288         nfs4_stateid_copy(stateid, &invalid_stateid);
4289         return decode_stateid(xdr, &dummy);
4290 }
4291
4292 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4293 {
4294         int status;
4295
4296         status = decode_op_hdr(xdr, OP_CLOSE);
4297         if (status != -EIO)
4298                 nfs_increment_open_seqid(status, res->seqid);
4299         if (!status)
4300                 status = decode_invalid_stateid(xdr, &res->stateid);
4301         return status;
4302 }
4303
4304 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4305 {
4306         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4307 }
4308
4309 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4310 {
4311         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4312 }
4313
4314 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4315 {
4316         int status;
4317
4318         status = decode_op_hdr(xdr, OP_COMMIT);
4319         if (!status)
4320                 status = decode_write_verifier(xdr, &res->verf->verifier);
4321         return status;
4322 }
4323
4324 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4325 {
4326         __be32 *p;
4327         uint32_t bmlen;
4328         int status;
4329
4330         status = decode_op_hdr(xdr, OP_CREATE);
4331         if (status)
4332                 return status;
4333         if ((status = decode_change_info(xdr, cinfo)))
4334                 return status;
4335         p = xdr_inline_decode(xdr, 4);
4336         if (unlikely(!p))
4337                 return -EIO;
4338         bmlen = be32_to_cpup(p);
4339         p = xdr_inline_decode(xdr, bmlen << 2);
4340         if (likely(p))
4341                 return 0;
4342         return -EIO;
4343 }
4344
4345 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4346 {
4347         unsigned int savep;
4348         uint32_t attrlen, bitmap[3] = {0};
4349         int status;
4350
4351         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4352                 goto xdr_error;
4353         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4354                 goto xdr_error;
4355         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4356                 goto xdr_error;
4357         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4358                 goto xdr_error;
4359         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4360                                                  &res->fh_expire_type)) != 0)
4361                 goto xdr_error;
4362         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4363                 goto xdr_error;
4364         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4365                 goto xdr_error;
4366         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4367                 goto xdr_error;
4368         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4369                                 res->exclcreat_bitmask)) != 0)
4370                 goto xdr_error;
4371         status = verify_attr_len(xdr, savep, attrlen);
4372 xdr_error:
4373         dprintk("%s: xdr returned %d!\n", __func__, -status);
4374         return status;
4375 }
4376
4377 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4378 {
4379         unsigned int savep;
4380         uint32_t attrlen, bitmap[3] = {0};
4381         int status;
4382
4383         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4384                 goto xdr_error;
4385         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4386                 goto xdr_error;
4387         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4388                 goto xdr_error;
4389
4390         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4391                 goto xdr_error;
4392         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4393                 goto xdr_error;
4394         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4395                 goto xdr_error;
4396
4397         status = -EIO;
4398         if (unlikely(bitmap[0]))
4399                 goto xdr_error;
4400
4401         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4402                 goto xdr_error;
4403         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4404                 goto xdr_error;
4405         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4406                 goto xdr_error;
4407
4408         status = verify_attr_len(xdr, savep, attrlen);
4409 xdr_error:
4410         dprintk("%s: xdr returned %d!\n", __func__, -status);
4411         return status;
4412 }
4413
4414 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4415 {
4416         unsigned int savep;
4417         uint32_t attrlen, bitmap[3] = {0};
4418         int status;
4419
4420         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4421                 goto xdr_error;
4422         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4423                 goto xdr_error;
4424         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4425                 goto xdr_error;
4426
4427         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4428                 goto xdr_error;
4429         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4430                 goto xdr_error;
4431
4432         status = verify_attr_len(xdr, savep, attrlen);
4433 xdr_error:
4434         dprintk("%s: xdr returned %d!\n", __func__, -status);
4435         return status;
4436 }
4437
4438 static int decode_threshold_hint(struct xdr_stream *xdr,
4439                                   uint32_t *bitmap,
4440                                   uint64_t *res,
4441                                   uint32_t hint_bit)
4442 {
4443         __be32 *p;
4444
4445         *res = 0;
4446         if (likely(bitmap[0] & hint_bit)) {
4447                 p = xdr_inline_decode(xdr, 8);
4448                 if (unlikely(!p))
4449                         return -EIO;
4450                 xdr_decode_hyper(p, res);
4451         }
4452         return 0;
4453 }
4454
4455 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4456                                         struct nfs4_threshold *res)
4457 {
4458         __be32 *p;
4459         unsigned int savep;
4460         uint32_t bitmap[3] = {0,}, attrlen;
4461         int status;
4462
4463         /* layout type */
4464         p = xdr_inline_decode(xdr, 4);
4465         if (unlikely(!p))
4466                 return -EIO;
4467         res->l_type = be32_to_cpup(p);
4468
4469         /* thi_hintset bitmap */
4470         status = decode_attr_bitmap(xdr, bitmap);
4471         if (status < 0)
4472                 goto xdr_error;
4473
4474         /* thi_hintlist length */
4475         status = decode_attr_length(xdr, &attrlen, &savep);
4476         if (status < 0)
4477                 goto xdr_error;
4478         /* thi_hintlist */
4479         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4480         if (status < 0)
4481                 goto xdr_error;
4482         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4483         if (status < 0)
4484                 goto xdr_error;
4485         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4486                                        THRESHOLD_RD_IO);
4487         if (status < 0)
4488                 goto xdr_error;
4489         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4490                                        THRESHOLD_WR_IO);
4491         if (status < 0)
4492                 goto xdr_error;
4493
4494         status = verify_attr_len(xdr, savep, attrlen);
4495         res->bm = bitmap[0];
4496
4497         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4498                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4499                 res->wr_io_sz);
4500 xdr_error:
4501         dprintk("%s ret=%d!\n", __func__, status);
4502         return status;
4503 }
4504
4505 /*
4506  * Thresholds on pNFS direct I/O vrs MDS I/O
4507  */
4508 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4509                                     uint32_t *bitmap,
4510                                     struct nfs4_threshold *res)
4511 {
4512         __be32 *p;
4513         int status = 0;
4514         uint32_t num;
4515
4516         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4517                 return -EIO;
4518         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4519                 /* Did the server return an unrequested attribute? */
4520                 if (unlikely(res == NULL))
4521                         return -EREMOTEIO;
4522                 p = xdr_inline_decode(xdr, 4);
4523                 if (unlikely(!p))
4524                         return -EIO;
4525                 num = be32_to_cpup(p);
4526                 if (num == 0)
4527                         return 0;
4528                 if (num > 1)
4529                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4530                                 "drivers per filesystem not supported\n",
4531                                 __func__);
4532
4533                 status = decode_first_threshold_item4(xdr, res);
4534                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4535         }
4536         return status;
4537 }
4538
4539 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4540                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4541                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4542                 const struct nfs_server *server)
4543 {
4544         int status;
4545         umode_t fmode = 0;
4546         uint32_t type;
4547         int32_t err;
4548
4549         status = decode_attr_type(xdr, bitmap, &type);
4550         if (status < 0)
4551                 goto xdr_error;
4552         fattr->mode = 0;
4553         if (status != 0) {
4554                 fattr->mode |= nfs_type2fmt[type];
4555                 fattr->valid |= status;
4556         }
4557
4558         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4559         if (status < 0)
4560                 goto xdr_error;
4561         fattr->valid |= status;
4562
4563         status = decode_attr_size(xdr, bitmap, &fattr->size);
4564         if (status < 0)
4565                 goto xdr_error;
4566         fattr->valid |= status;
4567
4568         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4569         if (status < 0)
4570                 goto xdr_error;
4571         fattr->valid |= status;
4572
4573         err = 0;
4574         status = decode_attr_error(xdr, bitmap, &err);
4575         if (status < 0)
4576                 goto xdr_error;
4577
4578         status = decode_attr_filehandle(xdr, bitmap, fh);
4579         if (status < 0)
4580                 goto xdr_error;
4581
4582         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4583         if (status < 0)
4584                 goto xdr_error;
4585         fattr->valid |= status;
4586
4587         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4588         if (status < 0)
4589                 goto xdr_error;
4590         fattr->valid |= status;
4591
4592         status = -EIO;
4593         if (unlikely(bitmap[0]))
4594                 goto xdr_error;
4595
4596         status = decode_attr_mode(xdr, bitmap, &fmode);
4597         if (status < 0)
4598                 goto xdr_error;
4599         if (status != 0) {
4600                 fattr->mode |= fmode;
4601                 fattr->valid |= status;
4602         }
4603
4604         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4605         if (status < 0)
4606                 goto xdr_error;
4607         fattr->valid |= status;
4608
4609         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4610         if (status < 0)
4611                 goto xdr_error;
4612         fattr->valid |= status;
4613
4614         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4615         if (status < 0)
4616                 goto xdr_error;
4617         fattr->valid |= status;
4618
4619         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4620         if (status < 0)
4621                 goto xdr_error;
4622         fattr->valid |= status;
4623
4624         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4625         if (status < 0)
4626                 goto xdr_error;
4627         fattr->valid |= status;
4628
4629         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4630         if (status < 0)
4631                 goto xdr_error;
4632         fattr->valid |= status;
4633
4634         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4635         if (status < 0)
4636                 goto xdr_error;
4637         fattr->valid |= status;
4638
4639         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4640         if (status < 0)
4641                 goto xdr_error;
4642         fattr->valid |= status;
4643
4644         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4645         if (status < 0)
4646                 goto xdr_error;
4647         fattr->valid |= status;
4648
4649         status = -EIO;
4650         if (unlikely(bitmap[1]))
4651                 goto xdr_error;
4652
4653         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4654         if (status < 0)
4655                 goto xdr_error;
4656
4657         if (label) {
4658                 status = decode_attr_security_label(xdr, bitmap, label);
4659                 if (status < 0)
4660                         goto xdr_error;
4661                 fattr->valid |= status;
4662         }
4663
4664 xdr_error:
4665         dprintk("%s: xdr returned %d\n", __func__, -status);
4666         return status;
4667 }
4668
4669 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4670                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4671                 struct nfs4_label *label, const struct nfs_server *server)
4672 {
4673         unsigned int savep;
4674         uint32_t attrlen,
4675                  bitmap[3] = {0};
4676         int status;
4677
4678         status = decode_op_hdr(xdr, OP_GETATTR);
4679         if (status < 0)
4680                 goto xdr_error;
4681
4682         status = decode_attr_bitmap(xdr, bitmap);
4683         if (status < 0)
4684                 goto xdr_error;
4685
4686         status = decode_attr_length(xdr, &attrlen, &savep);
4687         if (status < 0)
4688                 goto xdr_error;
4689
4690         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4691                                         label, server);
4692         if (status < 0)
4693                 goto xdr_error;
4694
4695         status = verify_attr_len(xdr, savep, attrlen);
4696 xdr_error:
4697         dprintk("%s: xdr returned %d\n", __func__, -status);
4698         return status;
4699 }
4700
4701 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4702                 struct nfs4_label *label, const struct nfs_server *server)
4703 {
4704         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4705 }
4706
4707 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4708                 const struct nfs_server *server)
4709 {
4710         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4711 }
4712
4713 /*
4714  * Decode potentially multiple layout types.
4715  */
4716 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4717                                     struct nfs_fsinfo *fsinfo)
4718 {
4719         __be32 *p;
4720         uint32_t i;
4721
4722         p = xdr_inline_decode(xdr, 4);
4723         if (unlikely(!p))
4724                 return -EIO;
4725         fsinfo->nlayouttypes = be32_to_cpup(p);
4726
4727         /* pNFS is not supported by the underlying file system */
4728         if (fsinfo->nlayouttypes == 0)
4729                 return 0;
4730
4731         /* Decode and set first layout type, move xdr->p past unused types */
4732         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4733         if (unlikely(!p))
4734                 return -EIO;
4735
4736         /* If we get too many, then just cap it at the max */
4737         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4738                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4739                         __func__, fsinfo->nlayouttypes);
4740                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4741         }
4742
4743         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4744                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4745         return 0;
4746 }
4747
4748 /*
4749  * The type of file system exported.
4750  * Note we must ensure that layouttype is set in any non-error case.
4751  */
4752 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4753                                 struct nfs_fsinfo *fsinfo)
4754 {
4755         int status = 0;
4756
4757         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4758         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4759                 return -EIO;
4760         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4761                 status = decode_pnfs_layout_types(xdr, fsinfo);
4762                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4763         }
4764         return status;
4765 }
4766
4767 /*
4768  * The prefered block size for layout directed io
4769  */
4770 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4771                                       uint32_t *res)
4772 {
4773         __be32 *p;
4774
4775         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4776         *res = 0;
4777         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4778                 p = xdr_inline_decode(xdr, 4);
4779                 if (unlikely(!p))
4780                         return -EIO;
4781                 *res = be32_to_cpup(p);
4782                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4783         }
4784         return 0;
4785 }
4786
4787 /*
4788  * The granularity of a CLONE operation.
4789  */
4790 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4791                                      uint32_t *res)
4792 {
4793         __be32 *p;
4794
4795         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4796         *res = 0;
4797         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4798                 p = xdr_inline_decode(xdr, 4);
4799                 if (unlikely(!p))
4800                         return -EIO;
4801                 *res = be32_to_cpup(p);
4802                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4803         }
4804         return 0;
4805 }
4806
4807 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4808 {
4809         unsigned int savep;
4810         uint32_t attrlen, bitmap[3];
4811         int status;
4812
4813         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4814                 goto xdr_error;
4815         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4816                 goto xdr_error;
4817         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4818                 goto xdr_error;
4819
4820         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4821
4822         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4823                 goto xdr_error;
4824         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4825                 goto xdr_error;
4826         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4827                 goto xdr_error;
4828         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4829         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4830                 goto xdr_error;
4831         fsinfo->wtpref = fsinfo->wtmax;
4832
4833         status = -EIO;
4834         if (unlikely(bitmap[0]))
4835                 goto xdr_error;
4836
4837         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4838         if (status != 0)
4839                 goto xdr_error;
4840         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4841         if (status != 0)
4842                 goto xdr_error;
4843
4844         status = -EIO;
4845         if (unlikely(bitmap[1]))
4846                 goto xdr_error;
4847
4848         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4849         if (status)
4850                 goto xdr_error;
4851         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4852         if (status)
4853                 goto xdr_error;
4854
4855         status = verify_attr_len(xdr, savep, attrlen);
4856 xdr_error:
4857         dprintk("%s: xdr returned %d!\n", __func__, -status);
4858         return status;
4859 }
4860
4861 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4862 {
4863         __be32 *p;
4864         uint32_t len;
4865         int status;
4866
4867         /* Zero handle first to allow comparisons */
4868         memset(fh, 0, sizeof(*fh));
4869
4870         status = decode_op_hdr(xdr, OP_GETFH);
4871         if (status)
4872                 return status;
4873
4874         p = xdr_inline_decode(xdr, 4);
4875         if (unlikely(!p))
4876                 return -EIO;
4877         len = be32_to_cpup(p);
4878         if (len > NFS4_FHSIZE)
4879                 return -EIO;
4880         fh->size = len;
4881         p = xdr_inline_decode(xdr, len);
4882         if (unlikely(!p))
4883                 return -EIO;
4884         memcpy(fh->data, p, len);
4885         return 0;
4886 }
4887
4888 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4889 {
4890         int status;
4891
4892         status = decode_op_hdr(xdr, OP_LINK);
4893         if (status)
4894                 return status;
4895         return decode_change_info(xdr, cinfo);
4896 }
4897
4898 /*
4899  * We create the owner, so we know a proper owner.id length is 4.
4900  */
4901 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4902 {
4903         uint64_t offset, length, clientid;
4904         __be32 *p;
4905         uint32_t namelen, type;
4906
4907         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4908         if (unlikely(!p))
4909                 return -EIO;
4910         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4911         p = xdr_decode_hyper(p, &length);
4912         type = be32_to_cpup(p++); /* 4 byte read */
4913         if (fl != NULL) { /* manipulate file lock */
4914                 fl->fl_start = (loff_t)offset;
4915                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4916                 if (length == ~(uint64_t)0)
4917                         fl->fl_end = OFFSET_MAX;
4918                 fl->fl_type = F_WRLCK;
4919                 if (type & 1)
4920                         fl->fl_type = F_RDLCK;
4921                 fl->fl_pid = 0;
4922         }
4923         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4924         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4925         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4926         if (likely(!p))
4927                 return -EIO;
4928         return -NFS4ERR_DENIED;
4929 }
4930
4931 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4932 {
4933         int status;
4934
4935         status = decode_op_hdr(xdr, OP_LOCK);
4936         if (status == -EIO)
4937                 goto out;
4938         if (status == 0) {
4939                 status = decode_lock_stateid(xdr, &res->stateid);
4940                 if (unlikely(status))
4941                         goto out;
4942         } else if (status == -NFS4ERR_DENIED)
4943                 status = decode_lock_denied(xdr, NULL);
4944         if (res->open_seqid != NULL)
4945                 nfs_increment_open_seqid(status, res->open_seqid);
4946         nfs_increment_lock_seqid(status, res->lock_seqid);
4947 out:
4948         return status;
4949 }
4950
4951 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4952 {
4953         int status;
4954         status = decode_op_hdr(xdr, OP_LOCKT);
4955         if (status == -NFS4ERR_DENIED)
4956                 return decode_lock_denied(xdr, res->denied);
4957         return status;
4958 }
4959
4960 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4961 {
4962         int status;
4963
4964         status = decode_op_hdr(xdr, OP_LOCKU);
4965         if (status != -EIO)
4966                 nfs_increment_lock_seqid(status, res->seqid);
4967         if (status == 0)
4968                 status = decode_lock_stateid(xdr, &res->stateid);
4969         return status;
4970 }
4971
4972 static int decode_release_lockowner(struct xdr_stream *xdr)
4973 {
4974         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4975 }
4976
4977 static int decode_lookup(struct xdr_stream *xdr)
4978 {
4979         return decode_op_hdr(xdr, OP_LOOKUP);
4980 }
4981
4982 static int decode_lookupp(struct xdr_stream *xdr)
4983 {
4984         return decode_op_hdr(xdr, OP_LOOKUPP);
4985 }
4986
4987 /* This is too sick! */
4988 static int decode_space_limit(struct xdr_stream *xdr,
4989                 unsigned long *pagemod_limit)
4990 {
4991         __be32 *p;
4992         uint32_t limit_type, nblocks, blocksize;
4993         u64 maxsize = 0;
4994
4995         p = xdr_inline_decode(xdr, 12);
4996         if (unlikely(!p))
4997                 return -EIO;
4998         limit_type = be32_to_cpup(p++);
4999         switch (limit_type) {
5000         case NFS4_LIMIT_SIZE:
5001                 xdr_decode_hyper(p, &maxsize);
5002                 break;
5003         case NFS4_LIMIT_BLOCKS:
5004                 nblocks = be32_to_cpup(p++);
5005                 blocksize = be32_to_cpup(p);
5006                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5007         }
5008         maxsize >>= PAGE_SHIFT;
5009         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5010         return 0;
5011 }
5012
5013 static int decode_rw_delegation(struct xdr_stream *xdr,
5014                 uint32_t delegation_type,
5015                 struct nfs_openres *res)
5016 {
5017         __be32 *p;
5018         int status;
5019
5020         status = decode_delegation_stateid(xdr, &res->delegation);
5021         if (unlikely(status))
5022                 return status;
5023         p = xdr_inline_decode(xdr, 4);
5024         if (unlikely(!p))
5025                 return -EIO;
5026         res->do_recall = be32_to_cpup(p);
5027
5028         switch (delegation_type) {
5029         case NFS4_OPEN_DELEGATE_READ:
5030                 res->delegation_type = FMODE_READ;
5031                 break;
5032         case NFS4_OPEN_DELEGATE_WRITE:
5033                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5034                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5035                                 return -EIO;
5036         }
5037         return decode_ace(xdr, NULL);
5038 }
5039
5040 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5041 {
5042         __be32 *p;
5043         uint32_t why_no_delegation;
5044
5045         p = xdr_inline_decode(xdr, 4);
5046         if (unlikely(!p))
5047                 return -EIO;
5048         why_no_delegation = be32_to_cpup(p);
5049         switch (why_no_delegation) {
5050                 case WND4_CONTENTION:
5051                 case WND4_RESOURCE:
5052                         xdr_inline_decode(xdr, 4);
5053                         /* Ignore for now */
5054         }
5055         return 0;
5056 }
5057
5058 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5059 {
5060         __be32 *p;
5061         uint32_t delegation_type;
5062
5063         p = xdr_inline_decode(xdr, 4);
5064         if (unlikely(!p))
5065                 return -EIO;
5066         delegation_type = be32_to_cpup(p);
5067         res->delegation_type = 0;
5068         switch (delegation_type) {
5069         case NFS4_OPEN_DELEGATE_NONE:
5070                 return 0;
5071         case NFS4_OPEN_DELEGATE_READ:
5072         case NFS4_OPEN_DELEGATE_WRITE:
5073                 return decode_rw_delegation(xdr, delegation_type, res);
5074         case NFS4_OPEN_DELEGATE_NONE_EXT:
5075                 return decode_no_delegation(xdr, res);
5076         }
5077         return -EIO;
5078 }
5079
5080 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5081 {
5082         __be32 *p;
5083         uint32_t savewords, bmlen, i;
5084         int status;
5085
5086         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5087                 return status;
5088         nfs_increment_open_seqid(status, res->seqid);
5089         if (status)
5090                 return status;
5091         status = decode_open_stateid(xdr, &res->stateid);
5092         if (unlikely(status))
5093                 return status;
5094
5095         decode_change_info(xdr, &res->cinfo);
5096
5097         p = xdr_inline_decode(xdr, 8);
5098         if (unlikely(!p))
5099                 return -EIO;
5100         res->rflags = be32_to_cpup(p++);
5101         bmlen = be32_to_cpup(p);
5102         if (bmlen > 10)
5103                 goto xdr_error;
5104
5105         p = xdr_inline_decode(xdr, bmlen << 2);
5106         if (unlikely(!p))
5107                 return -EIO;
5108         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5109         for (i = 0; i < savewords; ++i)
5110                 res->attrset[i] = be32_to_cpup(p++);
5111         for (; i < NFS4_BITMAP_SIZE; i++)
5112                 res->attrset[i] = 0;
5113
5114         return decode_delegation(xdr, res);
5115 xdr_error:
5116         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5117         return -EIO;
5118 }
5119
5120 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5121 {
5122         int status;
5123
5124         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5125         if (status != -EIO)
5126                 nfs_increment_open_seqid(status, res->seqid);
5127         if (!status)
5128                 status = decode_open_stateid(xdr, &res->stateid);
5129         return status;
5130 }
5131
5132 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5133 {
5134         int status;
5135
5136         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5137         if (status != -EIO)
5138                 nfs_increment_open_seqid(status, res->seqid);
5139         if (!status)
5140                 status = decode_open_stateid(xdr, &res->stateid);
5141         return status;
5142 }
5143
5144 static int decode_putfh(struct xdr_stream *xdr)
5145 {
5146         return decode_op_hdr(xdr, OP_PUTFH);
5147 }
5148
5149 static int decode_putrootfh(struct xdr_stream *xdr)
5150 {
5151         return decode_op_hdr(xdr, OP_PUTROOTFH);
5152 }
5153
5154 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5155                        struct nfs_pgio_res *res)
5156 {
5157         __be32 *p;
5158         uint32_t count, eof, recvd;
5159         int status;
5160
5161         status = decode_op_hdr(xdr, OP_READ);
5162         if (status)
5163                 return status;
5164         p = xdr_inline_decode(xdr, 8);
5165         if (unlikely(!p))
5166                 return -EIO;
5167         eof = be32_to_cpup(p++);
5168         count = be32_to_cpup(p);
5169         recvd = xdr_read_pages(xdr, count);
5170         if (count > recvd) {
5171                 dprintk("NFS: server cheating in read reply: "
5172                                 "count %u > recvd %u\n", count, recvd);
5173                 count = recvd;
5174                 eof = 0;
5175         }
5176         res->eof = eof;
5177         res->count = count;
5178         return 0;
5179 }
5180
5181 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5182 {
5183         int             status;
5184         __be32          verf[2];
5185
5186         status = decode_op_hdr(xdr, OP_READDIR);
5187         if (!status)
5188                 status = decode_verifier(xdr, readdir->verifier.data);
5189         if (unlikely(status))
5190                 return status;
5191         memcpy(verf, readdir->verifier.data, sizeof(verf));
5192         dprintk("%s: verifier = %08x:%08x\n",
5193                         __func__, verf[0], verf[1]);
5194         return xdr_read_pages(xdr, xdr->buf->page_len);
5195 }
5196
5197 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5198 {
5199         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5200         u32 len, recvd;
5201         __be32 *p;
5202         int status;
5203
5204         status = decode_op_hdr(xdr, OP_READLINK);
5205         if (status)
5206                 return status;
5207
5208         /* Convert length of symlink */
5209         p = xdr_inline_decode(xdr, 4);
5210         if (unlikely(!p))
5211                 return -EIO;
5212         len = be32_to_cpup(p);
5213         if (len >= rcvbuf->page_len || len <= 0) {
5214                 dprintk("nfs: server returned giant symlink!\n");
5215                 return -ENAMETOOLONG;
5216         }
5217         recvd = xdr_read_pages(xdr, len);
5218         if (recvd < len) {
5219                 dprintk("NFS: server cheating in readlink reply: "
5220                                 "count %u > recvd %u\n", len, recvd);
5221                 return -EIO;
5222         }
5223         /*
5224          * The XDR encode routine has set things up so that
5225          * the link text will be copied directly into the
5226          * buffer.  We just have to do overflow-checking,
5227          * and and null-terminate the text (the VFS expects
5228          * null-termination).
5229          */
5230         xdr_terminate_string(rcvbuf, len);
5231         return 0;
5232 }
5233
5234 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5235 {
5236         int status;
5237
5238         status = decode_op_hdr(xdr, OP_REMOVE);
5239         if (status)
5240                 goto out;
5241         status = decode_change_info(xdr, cinfo);
5242 out:
5243         return status;
5244 }
5245
5246 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5247               struct nfs4_change_info *new_cinfo)
5248 {
5249         int status;
5250
5251         status = decode_op_hdr(xdr, OP_RENAME);
5252         if (status)
5253                 goto out;
5254         if ((status = decode_change_info(xdr, old_cinfo)))
5255                 goto out;
5256         status = decode_change_info(xdr, new_cinfo);
5257 out:
5258         return status;
5259 }
5260
5261 static int decode_renew(struct xdr_stream *xdr)
5262 {
5263         return decode_op_hdr(xdr, OP_RENEW);
5264 }
5265
5266 static int
5267 decode_restorefh(struct xdr_stream *xdr)
5268 {
5269         return decode_op_hdr(xdr, OP_RESTOREFH);
5270 }
5271
5272 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5273                          struct nfs_getaclres *res)
5274 {
5275         unsigned int savep;
5276         uint32_t attrlen,
5277                  bitmap[3] = {0};
5278         int status;
5279         unsigned int pg_offset;
5280
5281         res->acl_len = 0;
5282         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5283                 goto out;
5284
5285         xdr_enter_page(xdr, xdr->buf->page_len);
5286
5287         /* Calculate the offset of the page data */
5288         pg_offset = xdr->buf->head[0].iov_len;
5289
5290         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5291                 goto out;
5292         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5293                 goto out;
5294
5295         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5296                 return -EIO;
5297         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5298
5299                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5300                  * are stored with the acl data to handle the problem of
5301                  * variable length bitmaps.*/
5302                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5303                 res->acl_len = attrlen;
5304
5305                 /* Check for receive buffer overflow */
5306                 if (res->acl_len > (xdr->nwords << 2) ||
5307                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5308                         res->acl_flags |= NFS4_ACL_TRUNC;
5309                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5310                                         attrlen, xdr->nwords << 2);
5311                 }
5312         } else
5313                 status = -EOPNOTSUPP;
5314
5315 out:
5316         return status;
5317 }
5318
5319 static int
5320 decode_savefh(struct xdr_stream *xdr)
5321 {
5322         return decode_op_hdr(xdr, OP_SAVEFH);
5323 }
5324
5325 static int decode_setattr(struct xdr_stream *xdr)
5326 {
5327         int status;
5328
5329         status = decode_op_hdr(xdr, OP_SETATTR);
5330         if (status)
5331                 return status;
5332         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5333                 return 0;
5334         return -EIO;
5335 }
5336
5337 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5338 {
5339         __be32 *p;
5340         uint32_t opnum;
5341         int32_t nfserr;
5342
5343         p = xdr_inline_decode(xdr, 8);
5344         if (unlikely(!p))
5345                 return -EIO;
5346         opnum = be32_to_cpup(p++);
5347         if (opnum != OP_SETCLIENTID) {
5348                 dprintk("nfs: decode_setclientid: Server returned operation"
5349                         " %d\n", opnum);
5350                 return -EIO;
5351         }
5352         nfserr = be32_to_cpup(p);
5353         if (nfserr == NFS_OK) {
5354                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5355                 if (unlikely(!p))
5356                         return -EIO;
5357                 p = xdr_decode_hyper(p, &res->clientid);
5358                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5359         } else if (nfserr == NFSERR_CLID_INUSE) {
5360                 uint32_t len;
5361
5362                 /* skip netid string */
5363                 p = xdr_inline_decode(xdr, 4);
5364                 if (unlikely(!p))
5365                         return -EIO;
5366                 len = be32_to_cpup(p);
5367                 p = xdr_inline_decode(xdr, len);
5368                 if (unlikely(!p))
5369                         return -EIO;
5370
5371                 /* skip uaddr string */
5372                 p = xdr_inline_decode(xdr, 4);
5373                 if (unlikely(!p))
5374                         return -EIO;
5375                 len = be32_to_cpup(p);
5376                 p = xdr_inline_decode(xdr, len);
5377                 if (unlikely(!p))
5378                         return -EIO;
5379                 return -NFSERR_CLID_INUSE;
5380         } else
5381                 return nfs4_stat_to_errno(nfserr);
5382
5383         return 0;
5384 }
5385
5386 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5387 {
5388         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5389 }
5390
5391 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5392 {
5393         __be32 *p;
5394         int status;
5395
5396         status = decode_op_hdr(xdr, OP_WRITE);
5397         if (status)
5398                 return status;
5399
5400         p = xdr_inline_decode(xdr, 8);
5401         if (unlikely(!p))
5402                 return -EIO;
5403         res->count = be32_to_cpup(p++);
5404         res->verf->committed = be32_to_cpup(p++);
5405         return decode_write_verifier(xdr, &res->verf->verifier);
5406 }
5407
5408 static int decode_delegreturn(struct xdr_stream *xdr)
5409 {
5410         return decode_op_hdr(xdr, OP_DELEGRETURN);
5411 }
5412
5413 static int decode_secinfo_gss(struct xdr_stream *xdr,
5414                               struct nfs4_secinfo4 *flavor)
5415 {
5416         u32 oid_len;
5417         __be32 *p;
5418
5419         p = xdr_inline_decode(xdr, 4);
5420         if (unlikely(!p))
5421                 return -EIO;
5422         oid_len = be32_to_cpup(p);
5423         if (oid_len > GSS_OID_MAX_LEN)
5424                 return -EINVAL;
5425
5426         p = xdr_inline_decode(xdr, oid_len);
5427         if (unlikely(!p))
5428                 return -EIO;
5429         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5430         flavor->flavor_info.oid.len = oid_len;
5431
5432         p = xdr_inline_decode(xdr, 8);
5433         if (unlikely(!p))
5434                 return -EIO;
5435         flavor->flavor_info.qop = be32_to_cpup(p++);
5436         flavor->flavor_info.service = be32_to_cpup(p);
5437
5438         return 0;
5439 }
5440
5441 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5442 {
5443         struct nfs4_secinfo4 *sec_flavor;
5444         unsigned int i, num_flavors;
5445         int status;
5446         __be32 *p;
5447
5448         p = xdr_inline_decode(xdr, 4);
5449         if (unlikely(!p))
5450                 return -EIO;
5451
5452         res->flavors->num_flavors = 0;
5453         num_flavors = be32_to_cpup(p);
5454
5455         for (i = 0; i < num_flavors; i++) {
5456                 sec_flavor = &res->flavors->flavors[i];
5457                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5458                         break;
5459
5460                 p = xdr_inline_decode(xdr, 4);
5461                 if (unlikely(!p))
5462                         return -EIO;
5463                 sec_flavor->flavor = be32_to_cpup(p);
5464
5465                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5466                         status = decode_secinfo_gss(xdr, sec_flavor);
5467                         if (status)
5468                                 goto out;
5469                 }
5470                 res->flavors->num_flavors++;
5471         }
5472
5473         status = 0;
5474 out:
5475         return status;
5476 }
5477
5478 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5479 {
5480         int status = decode_op_hdr(xdr, OP_SECINFO);
5481         if (status)
5482                 return status;
5483         return decode_secinfo_common(xdr, res);
5484 }
5485
5486 #if defined(CONFIG_NFS_V4_1)
5487 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5488 {
5489         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5490         if (status)
5491                 return status;
5492         return decode_secinfo_common(xdr, res);
5493 }
5494
5495 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5496 {
5497         __be32 *p;
5498         uint32_t bitmap_words;
5499         unsigned int i;
5500
5501         p = xdr_inline_decode(xdr, 4);
5502         if (!p)
5503                 return -EIO;
5504         bitmap_words = be32_to_cpup(p++);
5505         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5506                 return -EIO;
5507         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5508         for (i = 0; i < bitmap_words; i++)
5509                 op_map->u.words[i] = be32_to_cpup(p++);
5510
5511         return 0;
5512 }
5513
5514 static int decode_exchange_id(struct xdr_stream *xdr,
5515                               struct nfs41_exchange_id_res *res)
5516 {
5517         __be32 *p;
5518         uint32_t dummy;
5519         char *dummy_str;
5520         int status;
5521         uint32_t impl_id_count;
5522
5523         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5524         if (status)
5525                 return status;
5526
5527         p = xdr_inline_decode(xdr, 8);
5528         if (unlikely(!p))
5529                 return -EIO;
5530         xdr_decode_hyper(p, &res->clientid);
5531         p = xdr_inline_decode(xdr, 12);
5532         if (unlikely(!p))
5533                 return -EIO;
5534         res->seqid = be32_to_cpup(p++);
5535         res->flags = be32_to_cpup(p++);
5536
5537         res->state_protect.how = be32_to_cpup(p);
5538         switch (res->state_protect.how) {
5539         case SP4_NONE:
5540                 break;
5541         case SP4_MACH_CRED:
5542                 status = decode_op_map(xdr, &res->state_protect.enforce);
5543                 if (status)
5544                         return status;
5545                 status = decode_op_map(xdr, &res->state_protect.allow);
5546                 if (status)
5547                         return status;
5548                 break;
5549         default:
5550                 WARN_ON_ONCE(1);
5551                 return -EIO;
5552         }
5553
5554         /* server_owner4.so_minor_id */
5555         p = xdr_inline_decode(xdr, 8);
5556         if (unlikely(!p))
5557                 return -EIO;
5558         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5559
5560         /* server_owner4.so_major_id */
5561         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5562         if (unlikely(status))
5563                 return status;
5564         memcpy(res->server_owner->major_id, dummy_str, dummy);
5565         res->server_owner->major_id_sz = dummy;
5566
5567         /* server_scope4 */
5568         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5569         if (unlikely(status))
5570                 return status;
5571         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5572         res->server_scope->server_scope_sz = dummy;
5573
5574         /* Implementation Id */
5575         p = xdr_inline_decode(xdr, 4);
5576         if (unlikely(!p))
5577                 return -EIO;
5578         impl_id_count = be32_to_cpup(p++);
5579
5580         if (impl_id_count) {
5581                 /* nii_domain */
5582                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5583                 if (unlikely(status))
5584                         return status;
5585                 memcpy(res->impl_id->domain, dummy_str, dummy);
5586
5587                 /* nii_name */
5588                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5589                 if (unlikely(status))
5590                         return status;
5591                 memcpy(res->impl_id->name, dummy_str, dummy);
5592
5593                 /* nii_date */
5594                 p = xdr_inline_decode(xdr, 12);
5595                 if (unlikely(!p))
5596                         return -EIO;
5597                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5598                 res->impl_id->date.nseconds = be32_to_cpup(p);
5599
5600                 /* if there's more than one entry, ignore the rest */
5601         }
5602         return 0;
5603 }
5604
5605 static int decode_chan_attrs(struct xdr_stream *xdr,
5606                              struct nfs4_channel_attrs *attrs)
5607 {
5608         __be32 *p;
5609         u32 nr_attrs, val;
5610
5611         p = xdr_inline_decode(xdr, 28);
5612         if (unlikely(!p))
5613                 return -EIO;
5614         val = be32_to_cpup(p++);        /* headerpadsz */
5615         if (val)
5616                 return -EINVAL;         /* no support for header padding yet */
5617         attrs->max_rqst_sz = be32_to_cpup(p++);
5618         attrs->max_resp_sz = be32_to_cpup(p++);
5619         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5620         attrs->max_ops = be32_to_cpup(p++);
5621         attrs->max_reqs = be32_to_cpup(p++);
5622         nr_attrs = be32_to_cpup(p);
5623         if (unlikely(nr_attrs > 1)) {
5624                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5625                         "count %u\n", __func__, nr_attrs);
5626                 return -EINVAL;
5627         }
5628         if (nr_attrs == 1) {
5629                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5630                 if (unlikely(!p))
5631                         return -EIO;
5632         }
5633         return 0;
5634 }
5635
5636 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5637 {
5638         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5639 }
5640
5641 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5642                                 struct nfs41_bind_conn_to_session_res *res)
5643 {
5644         __be32 *p;
5645         int status;
5646
5647         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5648         if (!status)
5649                 status = decode_sessionid(xdr, &res->sessionid);
5650         if (unlikely(status))
5651                 return status;
5652
5653         /* dir flags, rdma mode bool */
5654         p = xdr_inline_decode(xdr, 8);
5655         if (unlikely(!p))
5656                 return -EIO;
5657
5658         res->dir = be32_to_cpup(p++);
5659         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5660                 return -EIO;
5661         if (be32_to_cpup(p) == 0)
5662                 res->use_conn_in_rdma_mode = false;
5663         else
5664                 res->use_conn_in_rdma_mode = true;
5665
5666         return 0;
5667 }
5668
5669 static int decode_create_session(struct xdr_stream *xdr,
5670                                  struct nfs41_create_session_res *res)
5671 {
5672         __be32 *p;
5673         int status;
5674
5675         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5676         if (!status)
5677                 status = decode_sessionid(xdr, &res->sessionid);
5678         if (unlikely(status))
5679                 return status;
5680
5681         /* seqid, flags */
5682         p = xdr_inline_decode(xdr, 8);
5683         if (unlikely(!p))
5684                 return -EIO;
5685         res->seqid = be32_to_cpup(p++);
5686         res->flags = be32_to_cpup(p);
5687
5688         /* Channel attributes */
5689         status = decode_chan_attrs(xdr, &res->fc_attrs);
5690         if (!status)
5691                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5692         return status;
5693 }
5694
5695 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5696 {
5697         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5698 }
5699
5700 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5701 {
5702         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5703 }
5704
5705 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5706 {
5707         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5708 }
5709 #endif /* CONFIG_NFS_V4_1 */
5710
5711 static int decode_sequence(struct xdr_stream *xdr,
5712                            struct nfs4_sequence_res *res,
5713                            struct rpc_rqst *rqstp)
5714 {
5715 #if defined(CONFIG_NFS_V4_1)
5716         struct nfs4_session *session;
5717         struct nfs4_sessionid id;
5718         u32 dummy;
5719         int status;
5720         __be32 *p;
5721
5722         if (res->sr_slot == NULL)
5723                 return 0;
5724         if (!res->sr_slot->table->session)
5725                 return 0;
5726
5727         status = decode_op_hdr(xdr, OP_SEQUENCE);
5728         if (!status)
5729                 status = decode_sessionid(xdr, &id);
5730         if (unlikely(status))
5731                 goto out_err;
5732
5733         /*
5734          * If the server returns different values for sessionID, slotID or
5735          * sequence number, the server is looney tunes.
5736          */
5737         status = -EREMOTEIO;
5738         session = res->sr_slot->table->session;
5739
5740         if (memcmp(id.data, session->sess_id.data,
5741                    NFS4_MAX_SESSIONID_LEN)) {
5742                 dprintk("%s Invalid session id\n", __func__);
5743                 goto out_err;
5744         }
5745
5746         p = xdr_inline_decode(xdr, 20);
5747         if (unlikely(!p))
5748                 goto out_overflow;
5749
5750         /* seqid */
5751         dummy = be32_to_cpup(p++);
5752         if (dummy != res->sr_slot->seq_nr) {
5753                 dprintk("%s Invalid sequence number\n", __func__);
5754                 goto out_err;
5755         }
5756         /* slot id */
5757         dummy = be32_to_cpup(p++);
5758         if (dummy != res->sr_slot->slot_nr) {
5759                 dprintk("%s Invalid slot id\n", __func__);
5760                 goto out_err;
5761         }
5762         /* highest slot id */
5763         res->sr_highest_slotid = be32_to_cpup(p++);
5764         /* target highest slot id */
5765         res->sr_target_highest_slotid = be32_to_cpup(p++);
5766         /* result flags */
5767         res->sr_status_flags = be32_to_cpup(p);
5768         status = 0;
5769 out_err:
5770         res->sr_status = status;
5771         return status;
5772 out_overflow:
5773         status = -EIO;
5774         goto out_err;
5775 #else  /* CONFIG_NFS_V4_1 */
5776         return 0;
5777 #endif /* CONFIG_NFS_V4_1 */
5778 }
5779
5780 #if defined(CONFIG_NFS_V4_1)
5781 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5782 {
5783         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5784         return decode_stateid(xdr, stateid);
5785 }
5786
5787 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5788                                 struct nfs4_getdeviceinfo_res *res)
5789 {
5790         struct pnfs_device *pdev = res->pdev;
5791         __be32 *p;
5792         uint32_t len, type;
5793         int status;
5794
5795         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5796         if (status) {
5797                 if (status == -ETOOSMALL) {
5798                         p = xdr_inline_decode(xdr, 4);
5799                         if (unlikely(!p))
5800                                 return -EIO;
5801                         pdev->mincount = be32_to_cpup(p);
5802                         dprintk("%s: Min count too small. mincnt = %u\n",
5803                                 __func__, pdev->mincount);
5804                 }
5805                 return status;
5806         }
5807
5808         p = xdr_inline_decode(xdr, 8);
5809         if (unlikely(!p))
5810                 return -EIO;
5811         type = be32_to_cpup(p++);
5812         if (type != pdev->layout_type) {
5813                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5814                         __func__, pdev->layout_type, type);
5815                 return -EINVAL;
5816         }
5817         /*
5818          * Get the length of the opaque device_addr4. xdr_read_pages places
5819          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5820          * and places the remaining xdr data in xdr_buf->tail
5821          */
5822         pdev->mincount = be32_to_cpup(p);
5823         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5824                 return -EIO;
5825
5826         /* Parse notification bitmap, verifying that it is zero. */
5827         p = xdr_inline_decode(xdr, 4);
5828         if (unlikely(!p))
5829                 return -EIO;
5830         len = be32_to_cpup(p);
5831         if (len) {
5832                 uint32_t i;
5833
5834                 p = xdr_inline_decode(xdr, 4 * len);
5835                 if (unlikely(!p))
5836                         return -EIO;
5837
5838                 res->notification = be32_to_cpup(p++);
5839                 for (i = 1; i < len; i++) {
5840                         if (be32_to_cpup(p++)) {
5841                                 dprintk("%s: unsupported notification\n",
5842                                         __func__);
5843                                 return -EIO;
5844                         }
5845                 }
5846         }
5847         return 0;
5848 }
5849
5850 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5851                             struct nfs4_layoutget_res *res)
5852 {
5853         __be32 *p;
5854         int status;
5855         u32 layout_count;
5856         u32 recvd;
5857
5858         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5859         if (status)
5860                 goto out;
5861         p = xdr_inline_decode(xdr, 4);
5862         if (unlikely(!p))
5863                 goto out_overflow;
5864         res->return_on_close = be32_to_cpup(p);
5865         decode_layout_stateid(xdr, &res->stateid);
5866         p = xdr_inline_decode(xdr, 4);
5867         if (unlikely(!p))
5868                 goto out_overflow;
5869         layout_count = be32_to_cpup(p);
5870         if (!layout_count) {
5871                 dprintk("%s: server responded with empty layout array\n",
5872                         __func__);
5873                 status = -EINVAL;
5874                 goto out;
5875         }
5876
5877         p = xdr_inline_decode(xdr, 28);
5878         if (unlikely(!p))
5879                 goto out_overflow;
5880         p = xdr_decode_hyper(p, &res->range.offset);
5881         p = xdr_decode_hyper(p, &res->range.length);
5882         res->range.iomode = be32_to_cpup(p++);
5883         res->type = be32_to_cpup(p++);
5884         res->layoutp->len = be32_to_cpup(p);
5885
5886         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5887                 __func__,
5888                 (unsigned long)res->range.offset,
5889                 (unsigned long)res->range.length,
5890                 res->range.iomode,
5891                 res->type,
5892                 res->layoutp->len);
5893
5894         recvd = xdr_read_pages(xdr, res->layoutp->len);
5895         if (res->layoutp->len > recvd) {
5896                 dprintk("NFS: server cheating in layoutget reply: "
5897                                 "layout len %u > recvd %u\n",
5898                                 res->layoutp->len, recvd);
5899                 status = -EINVAL;
5900                 goto out;
5901         }
5902
5903         if (layout_count > 1) {
5904                 /* We only handle a length one array at the moment.  Any
5905                  * further entries are just ignored.  Note that this means
5906                  * the client may see a response that is less than the
5907                  * minimum it requested.
5908                  */
5909                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5910                         __func__, layout_count);
5911         }
5912
5913 out:
5914         res->status = status;
5915         return status;
5916 out_overflow:
5917         status = -EIO;
5918         goto out;
5919 }
5920
5921 static int decode_layoutreturn(struct xdr_stream *xdr,
5922                                struct nfs4_layoutreturn_res *res)
5923 {
5924         __be32 *p;
5925         int status;
5926
5927         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5928         if (status)
5929                 return status;
5930         p = xdr_inline_decode(xdr, 4);
5931         if (unlikely(!p))
5932                 return -EIO;
5933         res->lrs_present = be32_to_cpup(p);
5934         if (res->lrs_present)
5935                 status = decode_layout_stateid(xdr, &res->stateid);
5936         else
5937                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5938         return status;
5939 }
5940
5941 static int decode_layoutcommit(struct xdr_stream *xdr,
5942                                struct rpc_rqst *req,
5943                                struct nfs4_layoutcommit_res *res)
5944 {
5945         __be32 *p;
5946         __u32 sizechanged;
5947         int status;
5948
5949         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5950         res->status = status;
5951         if (status)
5952                 return status;
5953
5954         p = xdr_inline_decode(xdr, 4);
5955         if (unlikely(!p))
5956                 return -EIO;
5957         sizechanged = be32_to_cpup(p);
5958
5959         if (sizechanged) {
5960                 /* throw away new size */
5961                 p = xdr_inline_decode(xdr, 8);
5962                 if (unlikely(!p))
5963                         return -EIO;
5964         }
5965         return 0;
5966 }
5967
5968 static int decode_test_stateid(struct xdr_stream *xdr,
5969                                struct nfs41_test_stateid_res *res)
5970 {
5971         __be32 *p;
5972         int status;
5973         int num_res;
5974
5975         status = decode_op_hdr(xdr, OP_TEST_STATEID);
5976         if (status)
5977                 return status;
5978
5979         p = xdr_inline_decode(xdr, 4);
5980         if (unlikely(!p))
5981                 return -EIO;
5982         num_res = be32_to_cpup(p++);
5983         if (num_res != 1)
5984                 return -EIO;
5985
5986         p = xdr_inline_decode(xdr, 4);
5987         if (unlikely(!p))
5988                 return -EIO;
5989         res->status = be32_to_cpup(p++);
5990
5991         return status;
5992 }
5993
5994 static int decode_free_stateid(struct xdr_stream *xdr,
5995                                struct nfs41_free_stateid_res *res)
5996 {
5997         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5998         return res->status;
5999 }
6000 #else
6001 static inline
6002 int decode_layoutreturn(struct xdr_stream *xdr,
6003                                struct nfs4_layoutreturn_res *res)
6004 {
6005         return 0;
6006 }
6007
6008 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6009                             struct nfs4_layoutget_res *res)
6010 {
6011         return 0;
6012 }
6013
6014 #endif /* CONFIG_NFS_V4_1 */
6015
6016 /*
6017  * END OF "GENERIC" DECODE ROUTINES.
6018  */
6019
6020 /*
6021  * Decode OPEN_DOWNGRADE response
6022  */
6023 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6024                                        struct xdr_stream *xdr,
6025                                        void *data)
6026 {
6027         struct nfs_closeres *res = data;
6028         struct compound_hdr hdr;
6029         int status;
6030
6031         status = decode_compound_hdr(xdr, &hdr);
6032         if (status)
6033                 goto out;
6034         status = decode_sequence(xdr, &res->seq_res, rqstp);
6035         if (status)
6036                 goto out;
6037         status = decode_putfh(xdr);
6038         if (status)
6039                 goto out;
6040         if (res->lr_res) {
6041                 status = decode_layoutreturn(xdr, res->lr_res);
6042                 res->lr_ret = status;
6043                 if (status)
6044                         goto out;
6045         }
6046         status = decode_open_downgrade(xdr, res);
6047 out:
6048         return status;
6049 }
6050
6051 /*
6052  * Decode ACCESS response
6053  */
6054 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6055                                void *data)
6056 {
6057         struct nfs4_accessres *res = data;
6058         struct compound_hdr hdr;
6059         int status;
6060
6061         status = decode_compound_hdr(xdr, &hdr);
6062         if (status)
6063                 goto out;
6064         status = decode_sequence(xdr, &res->seq_res, rqstp);
6065         if (status)
6066                 goto out;
6067         status = decode_putfh(xdr);
6068         if (status != 0)
6069                 goto out;
6070         status = decode_access(xdr, &res->supported, &res->access);
6071         if (status != 0)
6072                 goto out;
6073         if (res->fattr)
6074                 decode_getfattr(xdr, res->fattr, res->server);
6075 out:
6076         return status;
6077 }
6078
6079 /*
6080  * Decode LOOKUP response
6081  */
6082 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6083                                void *data)
6084 {
6085         struct nfs4_lookup_res *res = data;
6086         struct compound_hdr hdr;
6087         int status;
6088
6089         status = decode_compound_hdr(xdr, &hdr);
6090         if (status)
6091                 goto out;
6092         status = decode_sequence(xdr, &res->seq_res, rqstp);
6093         if (status)
6094                 goto out;
6095         status = decode_putfh(xdr);
6096         if (status)
6097                 goto out;
6098         status = decode_lookup(xdr);
6099         if (status)
6100                 goto out;
6101         status = decode_getfh(xdr, res->fh);
6102         if (status)
6103                 goto out;
6104         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6105 out:
6106         return status;
6107 }
6108
6109 /*
6110  * Decode LOOKUPP response
6111  */
6112 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6113                 void *data)
6114 {
6115         struct nfs4_lookupp_res *res = data;
6116         struct compound_hdr hdr;
6117         int status;
6118
6119         status = decode_compound_hdr(xdr, &hdr);
6120         if (status)
6121                 goto out;
6122         status = decode_sequence(xdr, &res->seq_res, rqstp);
6123         if (status)
6124                 goto out;
6125         status = decode_putfh(xdr);
6126         if (status)
6127                 goto out;
6128         status = decode_lookupp(xdr);
6129         if (status)
6130                 goto out;
6131         status = decode_getfh(xdr, res->fh);
6132         if (status)
6133                 goto out;
6134         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6135 out:
6136         return status;
6137 }
6138
6139 /*
6140  * Decode LOOKUP_ROOT response
6141  */
6142 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6143                                     struct xdr_stream *xdr,
6144                                     void *data)
6145 {
6146         struct nfs4_lookup_res *res = data;
6147         struct compound_hdr hdr;
6148         int status;
6149
6150         status = decode_compound_hdr(xdr, &hdr);
6151         if (status)
6152                 goto out;
6153         status = decode_sequence(xdr, &res->seq_res, rqstp);
6154         if (status)
6155                 goto out;
6156         status = decode_putrootfh(xdr);
6157         if (status)
6158                 goto out;
6159         status = decode_getfh(xdr, res->fh);
6160         if (status == 0)
6161                 status = decode_getfattr_label(xdr, res->fattr,
6162                                                 res->label, res->server);
6163 out:
6164         return status;
6165 }
6166
6167 /*
6168  * Decode REMOVE response
6169  */
6170 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6171                                void *data)
6172 {
6173         struct nfs_removeres *res = data;
6174         struct compound_hdr hdr;
6175         int status;
6176
6177         status = decode_compound_hdr(xdr, &hdr);
6178         if (status)
6179                 goto out;
6180         status = decode_sequence(xdr, &res->seq_res, rqstp);
6181         if (status)
6182                 goto out;
6183         status = decode_putfh(xdr);
6184         if (status)
6185                 goto out;
6186         status = decode_remove(xdr, &res->cinfo);
6187 out:
6188         return status;
6189 }
6190
6191 /*
6192  * Decode RENAME response
6193  */
6194 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6195                                void *data)
6196 {
6197         struct nfs_renameres *res = data;
6198         struct compound_hdr hdr;
6199         int status;
6200
6201         status = decode_compound_hdr(xdr, &hdr);
6202         if (status)
6203                 goto out;
6204         status = decode_sequence(xdr, &res->seq_res, rqstp);
6205         if (status)
6206                 goto out;
6207         status = decode_putfh(xdr);
6208         if (status)
6209                 goto out;
6210         status = decode_savefh(xdr);
6211         if (status)
6212                 goto out;
6213         status = decode_putfh(xdr);
6214         if (status)
6215                 goto out;
6216         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6217 out:
6218         return status;
6219 }
6220
6221 /*
6222  * Decode LINK response
6223  */
6224 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6225                              void *data)
6226 {
6227         struct nfs4_link_res *res = data;
6228         struct compound_hdr hdr;
6229         int status;
6230
6231         status = decode_compound_hdr(xdr, &hdr);
6232         if (status)
6233                 goto out;
6234         status = decode_sequence(xdr, &res->seq_res, rqstp);
6235         if (status)
6236                 goto out;
6237         status = decode_putfh(xdr);
6238         if (status)
6239                 goto out;
6240         status = decode_savefh(xdr);
6241         if (status)
6242                 goto out;
6243         status = decode_putfh(xdr);
6244         if (status)
6245                 goto out;
6246         status = decode_link(xdr, &res->cinfo);
6247         if (status)
6248                 goto out;
6249         /*
6250          * Note order: OP_LINK leaves the directory as the current
6251          *             filehandle.
6252          */
6253         status = decode_restorefh(xdr);
6254         if (status)
6255                 goto out;
6256         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6257 out:
6258         return status;
6259 }
6260
6261 /*
6262  * Decode CREATE response
6263  */
6264 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6265                                void *data)
6266 {
6267         struct nfs4_create_res *res = data;
6268         struct compound_hdr hdr;
6269         int status;
6270
6271         status = decode_compound_hdr(xdr, &hdr);
6272         if (status)
6273                 goto out;
6274         status = decode_sequence(xdr, &res->seq_res, rqstp);
6275         if (status)
6276                 goto out;
6277         status = decode_putfh(xdr);
6278         if (status)
6279                 goto out;
6280         status = decode_create(xdr, &res->dir_cinfo);
6281         if (status)
6282                 goto out;
6283         status = decode_getfh(xdr, res->fh);
6284         if (status)
6285                 goto out;
6286         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6287 out:
6288         return status;
6289 }
6290
6291 /*
6292  * Decode SYMLINK response
6293  */
6294 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6295                                 void *res)
6296 {
6297         return nfs4_xdr_dec_create(rqstp, xdr, res);
6298 }
6299
6300 /*
6301  * Decode GETATTR response
6302  */
6303 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6304                                 void *data)
6305 {
6306         struct nfs4_getattr_res *res = data;
6307         struct compound_hdr hdr;
6308         int status;
6309
6310         status = decode_compound_hdr(xdr, &hdr);
6311         if (status)
6312                 goto out;
6313         status = decode_sequence(xdr, &res->seq_res, rqstp);
6314         if (status)
6315                 goto out;
6316         status = decode_putfh(xdr);
6317         if (status)
6318                 goto out;
6319         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6320 out:
6321         return status;
6322 }
6323
6324 /*
6325  * Encode an SETACL request
6326  */
6327 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6328                                 const void *data)
6329 {
6330         const struct nfs_setaclargs *args = data;
6331         struct compound_hdr hdr = {
6332                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6333         };
6334
6335         encode_compound_hdr(xdr, req, &hdr);
6336         encode_sequence(xdr, &args->seq_args, &hdr);
6337         encode_putfh(xdr, args->fh, &hdr);
6338         encode_setacl(xdr, args, &hdr);
6339         encode_nops(&hdr);
6340 }
6341
6342 /*
6343  * Decode SETACL response
6344  */
6345 static int
6346 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6347                     void *data)
6348 {
6349         struct nfs_setaclres *res = data;
6350         struct compound_hdr hdr;
6351         int status;
6352
6353         status = decode_compound_hdr(xdr, &hdr);
6354         if (status)
6355                 goto out;
6356         status = decode_sequence(xdr, &res->seq_res, rqstp);
6357         if (status)
6358                 goto out;
6359         status = decode_putfh(xdr);
6360         if (status)
6361                 goto out;
6362         status = decode_setattr(xdr);
6363 out:
6364         return status;
6365 }
6366
6367 /*
6368  * Decode GETACL response
6369  */
6370 static int
6371 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6372                     void *data)
6373 {
6374         struct nfs_getaclres *res = data;
6375         struct compound_hdr hdr;
6376         int status;
6377
6378         if (res->acl_scratch != NULL) {
6379                 void *p = page_address(res->acl_scratch);
6380                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6381         }
6382         status = decode_compound_hdr(xdr, &hdr);
6383         if (status)
6384                 goto out;
6385         status = decode_sequence(xdr, &res->seq_res, rqstp);
6386         if (status)
6387                 goto out;
6388         status = decode_putfh(xdr);
6389         if (status)
6390                 goto out;
6391         status = decode_getacl(xdr, rqstp, res);
6392
6393 out:
6394         return status;
6395 }
6396
6397 /*
6398  * Decode CLOSE response
6399  */
6400 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6401                               void *data)
6402 {
6403         struct nfs_closeres *res = data;
6404         struct compound_hdr hdr;
6405         int status;
6406
6407         status = decode_compound_hdr(xdr, &hdr);
6408         if (status)
6409                 goto out;
6410         status = decode_sequence(xdr, &res->seq_res, rqstp);
6411         if (status)
6412                 goto out;
6413         status = decode_putfh(xdr);
6414         if (status)
6415                 goto out;
6416         if (res->lr_res) {
6417                 status = decode_layoutreturn(xdr, res->lr_res);
6418                 res->lr_ret = status;
6419                 if (status)
6420                         goto out;
6421         }
6422         if (res->fattr != NULL) {
6423                 status = decode_getfattr(xdr, res->fattr, res->server);
6424                 if (status != 0)
6425                         goto out;
6426         }
6427         status = decode_close(xdr, res);
6428 out:
6429         return status;
6430 }
6431
6432 /*
6433  * Decode OPEN response
6434  */
6435 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6436                              void *data)
6437 {
6438         struct nfs_openres *res = data;
6439         struct compound_hdr hdr;
6440         int status;
6441
6442         status = decode_compound_hdr(xdr, &hdr);
6443         if (status)
6444                 goto out;
6445         status = decode_sequence(xdr, &res->seq_res, rqstp);
6446         if (status)
6447                 goto out;
6448         status = decode_putfh(xdr);
6449         if (status)
6450                 goto out;
6451         status = decode_open(xdr, res);
6452         if (status)
6453                 goto out;
6454         status = decode_getfh(xdr, &res->fh);
6455         if (status)
6456                 goto out;
6457         if (res->access_request)
6458                 decode_access(xdr, &res->access_supported, &res->access_result);
6459         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6460         if (res->lg_res)
6461                 decode_layoutget(xdr, rqstp, res->lg_res);
6462 out:
6463         return status;
6464 }
6465
6466 /*
6467  * Decode OPEN_CONFIRM response
6468  */
6469 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6470                                      struct xdr_stream *xdr,
6471                                      void *data)
6472 {
6473         struct nfs_open_confirmres *res = data;
6474         struct compound_hdr hdr;
6475         int status;
6476
6477         status = decode_compound_hdr(xdr, &hdr);
6478         if (status)
6479                 goto out;
6480         status = decode_putfh(xdr);
6481         if (status)
6482                 goto out;
6483         status = decode_open_confirm(xdr, res);
6484 out:
6485         return status;
6486 }
6487
6488 /*
6489  * Decode OPEN response
6490  */
6491 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6492                                     struct xdr_stream *xdr,
6493                                     void *data)
6494 {
6495         struct nfs_openres *res = data;
6496         struct compound_hdr hdr;
6497         int status;
6498
6499         status = decode_compound_hdr(xdr, &hdr);
6500         if (status)
6501                 goto out;
6502         status = decode_sequence(xdr, &res->seq_res, rqstp);
6503         if (status)
6504                 goto out;
6505         status = decode_putfh(xdr);
6506         if (status)
6507                 goto out;
6508         status = decode_open(xdr, res);
6509         if (status)
6510                 goto out;
6511         if (res->access_request)
6512                 decode_access(xdr, &res->access_supported, &res->access_result);
6513         decode_getfattr(xdr, res->f_attr, res->server);
6514         if (res->lg_res)
6515                 decode_layoutget(xdr, rqstp, res->lg_res);
6516 out:
6517         return status;
6518 }
6519
6520 /*
6521  * Decode SETATTR response
6522  */
6523 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6524                                 struct xdr_stream *xdr,
6525                                 void *data)
6526 {
6527         struct nfs_setattrres *res = data;
6528         struct compound_hdr hdr;
6529         int status;
6530
6531         status = decode_compound_hdr(xdr, &hdr);
6532         if (status)
6533                 goto out;
6534         status = decode_sequence(xdr, &res->seq_res, rqstp);
6535         if (status)
6536                 goto out;
6537         status = decode_putfh(xdr);
6538         if (status)
6539                 goto out;
6540         status = decode_setattr(xdr);
6541         if (status)
6542                 goto out;
6543         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6544 out:
6545         return status;
6546 }
6547
6548 /*
6549  * Decode LOCK response
6550  */
6551 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6552                              void *data)
6553 {
6554         struct nfs_lock_res *res = data;
6555         struct compound_hdr hdr;
6556         int status;
6557
6558         status = decode_compound_hdr(xdr, &hdr);
6559         if (status)
6560                 goto out;
6561         status = decode_sequence(xdr, &res->seq_res, rqstp);
6562         if (status)
6563                 goto out;
6564         status = decode_putfh(xdr);
6565         if (status)
6566                 goto out;
6567         status = decode_lock(xdr, res);
6568 out:
6569         return status;
6570 }
6571
6572 /*
6573  * Decode LOCKT response
6574  */
6575 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6576                               void *data)
6577 {
6578         struct nfs_lockt_res *res = data;
6579         struct compound_hdr hdr;
6580         int status;
6581
6582         status = decode_compound_hdr(xdr, &hdr);
6583         if (status)
6584                 goto out;
6585         status = decode_sequence(xdr, &res->seq_res, rqstp);
6586         if (status)
6587                 goto out;
6588         status = decode_putfh(xdr);
6589         if (status)
6590                 goto out;
6591         status = decode_lockt(xdr, res);
6592 out:
6593         return status;
6594 }
6595
6596 /*
6597  * Decode LOCKU response
6598  */
6599 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6600                               void *data)
6601 {
6602         struct nfs_locku_res *res = data;
6603         struct compound_hdr hdr;
6604         int status;
6605
6606         status = decode_compound_hdr(xdr, &hdr);
6607         if (status)
6608                 goto out;
6609         status = decode_sequence(xdr, &res->seq_res, rqstp);
6610         if (status)
6611                 goto out;
6612         status = decode_putfh(xdr);
6613         if (status)
6614                 goto out;
6615         status = decode_locku(xdr, res);
6616 out:
6617         return status;
6618 }
6619
6620 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6621                                           struct xdr_stream *xdr, void *dummy)
6622 {
6623         struct compound_hdr hdr;
6624         int status;
6625
6626         status = decode_compound_hdr(xdr, &hdr);
6627         if (!status)
6628                 status = decode_release_lockowner(xdr);
6629         return status;
6630 }
6631
6632 /*
6633  * Decode READLINK response
6634  */
6635 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6636                                  struct xdr_stream *xdr,
6637                                  void *data)
6638 {
6639         struct nfs4_readlink_res *res = data;
6640         struct compound_hdr hdr;
6641         int status;
6642
6643         status = decode_compound_hdr(xdr, &hdr);
6644         if (status)
6645                 goto out;
6646         status = decode_sequence(xdr, &res->seq_res, rqstp);
6647         if (status)
6648                 goto out;
6649         status = decode_putfh(xdr);
6650         if (status)
6651                 goto out;
6652         status = decode_readlink(xdr, rqstp);
6653 out:
6654         return status;
6655 }
6656
6657 /*
6658  * Decode READDIR response
6659  */
6660 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6661                                 void *data)
6662 {
6663         struct nfs4_readdir_res *res = data;
6664         struct compound_hdr hdr;
6665         int status;
6666
6667         status = decode_compound_hdr(xdr, &hdr);
6668         if (status)
6669                 goto out;
6670         status = decode_sequence(xdr, &res->seq_res, rqstp);
6671         if (status)
6672                 goto out;
6673         status = decode_putfh(xdr);
6674         if (status)
6675                 goto out;
6676         status = decode_readdir(xdr, rqstp, res);
6677 out:
6678         return status;
6679 }
6680
6681 /*
6682  * Decode Read response
6683  */
6684 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6685                              void *data)
6686 {
6687         struct nfs_pgio_res *res = data;
6688         struct compound_hdr hdr;
6689         int status;
6690
6691         status = decode_compound_hdr(xdr, &hdr);
6692         res->op_status = hdr.status;
6693         if (status)
6694                 goto out;
6695         status = decode_sequence(xdr, &res->seq_res, rqstp);
6696         if (status)
6697                 goto out;
6698         status = decode_putfh(xdr);
6699         if (status)
6700                 goto out;
6701         status = decode_read(xdr, rqstp, res);
6702         if (!status)
6703                 status = res->count;
6704 out:
6705         return status;
6706 }
6707
6708 /*
6709  * Decode WRITE response
6710  */
6711 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6712                               void *data)
6713 {
6714         struct nfs_pgio_res *res = data;
6715         struct compound_hdr hdr;
6716         int status;
6717
6718         status = decode_compound_hdr(xdr, &hdr);
6719         res->op_status = hdr.status;
6720         if (status)
6721                 goto out;
6722         status = decode_sequence(xdr, &res->seq_res, rqstp);
6723         if (status)
6724                 goto out;
6725         status = decode_putfh(xdr);
6726         if (status)
6727                 goto out;
6728         status = decode_write(xdr, res);
6729         if (status)
6730                 goto out;
6731         if (res->fattr)
6732                 decode_getfattr(xdr, res->fattr, res->server);
6733         if (!status)
6734                 status = res->count;
6735 out:
6736         return status;
6737 }
6738
6739 /*
6740  * Decode COMMIT response
6741  */
6742 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6743                                void *data)
6744 {
6745         struct nfs_commitres *res = data;
6746         struct compound_hdr hdr;
6747         int status;
6748
6749         status = decode_compound_hdr(xdr, &hdr);
6750         res->op_status = hdr.status;
6751         if (status)
6752                 goto out;
6753         status = decode_sequence(xdr, &res->seq_res, rqstp);
6754         if (status)
6755                 goto out;
6756         status = decode_putfh(xdr);
6757         if (status)
6758                 goto out;
6759         status = decode_commit(xdr, res);
6760 out:
6761         return status;
6762 }
6763
6764 /*
6765  * Decode FSINFO response
6766  */
6767 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6768                                void *data)
6769 {
6770         struct nfs4_fsinfo_res *res = data;
6771         struct compound_hdr hdr;
6772         int status;
6773
6774         status = decode_compound_hdr(xdr, &hdr);
6775         if (!status)
6776                 status = decode_sequence(xdr, &res->seq_res, req);
6777         if (!status)
6778                 status = decode_putfh(xdr);
6779         if (!status)
6780                 status = decode_fsinfo(xdr, res->fsinfo);
6781         return status;
6782 }
6783
6784 /*
6785  * Decode PATHCONF response
6786  */
6787 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6788                                  void *data)
6789 {
6790         struct nfs4_pathconf_res *res = data;
6791         struct compound_hdr hdr;
6792         int status;
6793
6794         status = decode_compound_hdr(xdr, &hdr);
6795         if (!status)
6796                 status = decode_sequence(xdr, &res->seq_res, req);
6797         if (!status)
6798                 status = decode_putfh(xdr);
6799         if (!status)
6800                 status = decode_pathconf(xdr, res->pathconf);
6801         return status;
6802 }
6803
6804 /*
6805  * Decode STATFS response
6806  */
6807 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6808                                void *data)
6809 {
6810         struct nfs4_statfs_res *res = data;
6811         struct compound_hdr hdr;
6812         int status;
6813
6814         status = decode_compound_hdr(xdr, &hdr);
6815         if (!status)
6816                 status = decode_sequence(xdr, &res->seq_res, req);
6817         if (!status)
6818                 status = decode_putfh(xdr);
6819         if (!status)
6820                 status = decode_statfs(xdr, res->fsstat);
6821         return status;
6822 }
6823
6824 /*
6825  * Decode GETATTR_BITMAP response
6826  */
6827 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6828                                     struct xdr_stream *xdr,
6829                                     void *data)
6830 {
6831         struct nfs4_server_caps_res *res = data;
6832         struct compound_hdr hdr;
6833         int status;
6834
6835         status = decode_compound_hdr(xdr, &hdr);
6836         if (status)
6837                 goto out;
6838         status = decode_sequence(xdr, &res->seq_res, req);
6839         if (status)
6840                 goto out;
6841         status = decode_putfh(xdr);
6842         if (status)
6843                 goto out;
6844         status = decode_server_caps(xdr, res);
6845 out:
6846         return status;
6847 }
6848
6849 /*
6850  * Decode RENEW response
6851  */
6852 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6853                               void *__unused)
6854 {
6855         struct compound_hdr hdr;
6856         int status;
6857
6858         status = decode_compound_hdr(xdr, &hdr);
6859         if (!status)
6860                 status = decode_renew(xdr);
6861         return status;
6862 }
6863
6864 /*
6865  * Decode SETCLIENTID response
6866  */
6867 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6868                                     struct xdr_stream *xdr,
6869                                     void *data)
6870 {
6871         struct nfs4_setclientid_res *res = data;
6872         struct compound_hdr hdr;
6873         int status;
6874
6875         status = decode_compound_hdr(xdr, &hdr);
6876         if (!status)
6877                 status = decode_setclientid(xdr, res);
6878         return status;
6879 }
6880
6881 /*
6882  * Decode SETCLIENTID_CONFIRM response
6883  */
6884 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6885                                             struct xdr_stream *xdr,
6886                                             void *data)
6887 {
6888         struct compound_hdr hdr;
6889         int status;
6890
6891         status = decode_compound_hdr(xdr, &hdr);
6892         if (!status)
6893                 status = decode_setclientid_confirm(xdr);
6894         return status;
6895 }
6896
6897 /*
6898  * Decode DELEGRETURN response
6899  */
6900 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6901                                     struct xdr_stream *xdr,
6902                                     void *data)
6903 {
6904         struct nfs4_delegreturnres *res = data;
6905         struct compound_hdr hdr;
6906         int status;
6907
6908         status = decode_compound_hdr(xdr, &hdr);
6909         if (status)
6910                 goto out;
6911         status = decode_sequence(xdr, &res->seq_res, rqstp);
6912         if (status)
6913                 goto out;
6914         status = decode_putfh(xdr);
6915         if (status != 0)
6916                 goto out;
6917         if (res->lr_res) {
6918                 status = decode_layoutreturn(xdr, res->lr_res);
6919                 res->lr_ret = status;
6920                 if (status)
6921                         goto out;
6922         }
6923         if (res->fattr) {
6924                 status = decode_getfattr(xdr, res->fattr, res->server);
6925                 if (status != 0)
6926                         goto out;
6927         }
6928         status = decode_delegreturn(xdr);
6929 out:
6930         return status;
6931 }
6932
6933 /*
6934  * Decode FS_LOCATIONS response
6935  */
6936 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6937                                      struct xdr_stream *xdr,
6938                                      void *data)
6939 {
6940         struct nfs4_fs_locations_res *res = data;
6941         struct compound_hdr hdr;
6942         int status;
6943
6944         status = decode_compound_hdr(xdr, &hdr);
6945         if (status)
6946                 goto out;
6947         status = decode_sequence(xdr, &res->seq_res, req);
6948         if (status)
6949                 goto out;
6950         status = decode_putfh(xdr);
6951         if (status)
6952                 goto out;
6953         if (res->migration) {
6954                 xdr_enter_page(xdr, PAGE_SIZE);
6955                 status = decode_getfattr_generic(xdr,
6956                                         &res->fs_locations->fattr,
6957                                          NULL, res->fs_locations,
6958                                          NULL, res->fs_locations->server);
6959                 if (status)
6960                         goto out;
6961                 if (res->renew)
6962                         status = decode_renew(xdr);
6963         } else {
6964                 status = decode_lookup(xdr);
6965                 if (status)
6966                         goto out;
6967                 xdr_enter_page(xdr, PAGE_SIZE);
6968                 status = decode_getfattr_generic(xdr,
6969                                         &res->fs_locations->fattr,
6970                                          NULL, res->fs_locations,
6971                                          NULL, res->fs_locations->server);
6972         }
6973 out:
6974         return status;
6975 }
6976
6977 /*
6978  * Decode SECINFO response
6979  */
6980 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6981                                 struct xdr_stream *xdr,
6982                                 void *data)
6983 {
6984         struct nfs4_secinfo_res *res = data;
6985         struct compound_hdr hdr;
6986         int status;
6987
6988         status = decode_compound_hdr(xdr, &hdr);
6989         if (status)
6990                 goto out;
6991         status = decode_sequence(xdr, &res->seq_res, rqstp);
6992         if (status)
6993                 goto out;
6994         status = decode_putfh(xdr);
6995         if (status)
6996                 goto out;
6997         status = decode_secinfo(xdr, res);
6998 out:
6999         return status;
7000 }
7001
7002 /*
7003  * Decode FSID_PRESENT response
7004  */
7005 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7006                                      struct xdr_stream *xdr,
7007                                      void *data)
7008 {
7009         struct nfs4_fsid_present_res *res = data;
7010         struct compound_hdr hdr;
7011         int status;
7012
7013         status = decode_compound_hdr(xdr, &hdr);
7014         if (status)
7015                 goto out;
7016         status = decode_sequence(xdr, &res->seq_res, rqstp);
7017         if (status)
7018                 goto out;
7019         status = decode_putfh(xdr);
7020         if (status)
7021                 goto out;
7022         status = decode_getfh(xdr, res->fh);
7023         if (status)
7024                 goto out;
7025         if (res->renew)
7026                 status = decode_renew(xdr);
7027 out:
7028         return status;
7029 }
7030
7031 #if defined(CONFIG_NFS_V4_1)
7032 /*
7033  * Decode BIND_CONN_TO_SESSION response
7034  */
7035 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7036                                         struct xdr_stream *xdr,
7037                                         void *res)
7038 {
7039         struct compound_hdr hdr;
7040         int status;
7041
7042         status = decode_compound_hdr(xdr, &hdr);
7043         if (!status)
7044                 status = decode_bind_conn_to_session(xdr, res);
7045         return status;
7046 }
7047
7048 /*
7049  * Decode EXCHANGE_ID response
7050  */
7051 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7052                                     struct xdr_stream *xdr,
7053                                     void *res)
7054 {
7055         struct compound_hdr hdr;
7056         int status;
7057
7058         status = decode_compound_hdr(xdr, &hdr);
7059         if (!status)
7060                 status = decode_exchange_id(xdr, res);
7061         return status;
7062 }
7063
7064 /*
7065  * Decode CREATE_SESSION response
7066  */
7067 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7068                                        struct xdr_stream *xdr,
7069                                        void *res)
7070 {
7071         struct compound_hdr hdr;
7072         int status;
7073
7074         status = decode_compound_hdr(xdr, &hdr);
7075         if (!status)
7076                 status = decode_create_session(xdr, res);
7077         return status;
7078 }
7079
7080 /*
7081  * Decode DESTROY_SESSION response
7082  */
7083 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7084                                         struct xdr_stream *xdr,
7085                                         void *res)
7086 {
7087         struct compound_hdr hdr;
7088         int status;
7089
7090         status = decode_compound_hdr(xdr, &hdr);
7091         if (!status)
7092                 status = decode_destroy_session(xdr, res);
7093         return status;
7094 }
7095
7096 /*
7097  * Decode DESTROY_CLIENTID response
7098  */
7099 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7100                                         struct xdr_stream *xdr,
7101                                         void *res)
7102 {
7103         struct compound_hdr hdr;
7104         int status;
7105
7106         status = decode_compound_hdr(xdr, &hdr);
7107         if (!status)
7108                 status = decode_destroy_clientid(xdr, res);
7109         return status;
7110 }
7111
7112 /*
7113  * Decode SEQUENCE response
7114  */
7115 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7116                                  struct xdr_stream *xdr,
7117                                  void *res)
7118 {
7119         struct compound_hdr hdr;
7120         int status;
7121
7122         status = decode_compound_hdr(xdr, &hdr);
7123         if (!status)
7124                 status = decode_sequence(xdr, res, rqstp);
7125         return status;
7126 }
7127
7128 #endif
7129
7130 /*
7131  * Decode GET_LEASE_TIME response
7132  */
7133 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7134                                        struct xdr_stream *xdr,
7135                                        void *data)
7136 {
7137         struct nfs4_get_lease_time_res *res = data;
7138         struct compound_hdr hdr;
7139         int status;
7140
7141         status = decode_compound_hdr(xdr, &hdr);
7142         if (!status)
7143                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7144         if (!status)
7145                 status = decode_putrootfh(xdr);
7146         if (!status)
7147                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7148         return status;
7149 }
7150
7151 #ifdef CONFIG_NFS_V4_1
7152
7153 /*
7154  * Decode RECLAIM_COMPLETE response
7155  */
7156 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7157                                          struct xdr_stream *xdr,
7158                                          void *data)
7159 {
7160         struct nfs41_reclaim_complete_res *res = data;
7161         struct compound_hdr hdr;
7162         int status;
7163
7164         status = decode_compound_hdr(xdr, &hdr);
7165         if (!status)
7166                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7167         if (!status)
7168                 status = decode_reclaim_complete(xdr, NULL);
7169         return status;
7170 }
7171
7172 /*
7173  * Decode GETDEVINFO response
7174  */
7175 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7176                                       struct xdr_stream *xdr,
7177                                       void *data)
7178 {
7179         struct nfs4_getdeviceinfo_res *res = data;
7180         struct compound_hdr hdr;
7181         int status;
7182
7183         status = decode_compound_hdr(xdr, &hdr);
7184         if (status != 0)
7185                 goto out;
7186         status = decode_sequence(xdr, &res->seq_res, rqstp);
7187         if (status != 0)
7188                 goto out;
7189         status = decode_getdeviceinfo(xdr, res);
7190 out:
7191         return status;
7192 }
7193
7194 /*
7195  * Decode LAYOUTGET response
7196  */
7197 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7198                                   struct xdr_stream *xdr,
7199                                   void *data)
7200 {
7201         struct nfs4_layoutget_res *res = data;
7202         struct compound_hdr hdr;
7203         int status;
7204
7205         status = decode_compound_hdr(xdr, &hdr);
7206         if (status)
7207                 goto out;
7208         status = decode_sequence(xdr, &res->seq_res, rqstp);
7209         if (status)
7210                 goto out;
7211         status = decode_putfh(xdr);
7212         if (status)
7213                 goto out;
7214         status = decode_layoutget(xdr, rqstp, res);
7215 out:
7216         return status;
7217 }
7218
7219 /*
7220  * Decode LAYOUTRETURN response
7221  */
7222 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7223                                      struct xdr_stream *xdr,
7224                                      void *data)
7225 {
7226         struct nfs4_layoutreturn_res *res = data;
7227         struct compound_hdr hdr;
7228         int status;
7229
7230         status = decode_compound_hdr(xdr, &hdr);
7231         if (status)
7232                 goto out;
7233         status = decode_sequence(xdr, &res->seq_res, rqstp);
7234         if (status)
7235                 goto out;
7236         status = decode_putfh(xdr);
7237         if (status)
7238                 goto out;
7239         status = decode_layoutreturn(xdr, res);
7240 out:
7241         return status;
7242 }
7243
7244 /*
7245  * Decode LAYOUTCOMMIT response
7246  */
7247 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7248                                      struct xdr_stream *xdr,
7249                                      void *data)
7250 {
7251         struct nfs4_layoutcommit_res *res = data;
7252         struct compound_hdr hdr;
7253         int status;
7254
7255         status = decode_compound_hdr(xdr, &hdr);
7256         if (status)
7257                 goto out;
7258         status = decode_sequence(xdr, &res->seq_res, rqstp);
7259         if (status)
7260                 goto out;
7261         status = decode_putfh(xdr);
7262         if (status)
7263                 goto out;
7264         status = decode_layoutcommit(xdr, rqstp, res);
7265         if (status)
7266                 goto out;
7267         decode_getfattr(xdr, res->fattr, res->server);
7268 out:
7269         return status;
7270 }
7271
7272 /*
7273  * Decode SECINFO_NO_NAME response
7274  */
7275 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7276                                         struct xdr_stream *xdr,
7277                                         void *data)
7278 {
7279         struct nfs4_secinfo_res *res = data;
7280         struct compound_hdr hdr;
7281         int status;
7282
7283         status = decode_compound_hdr(xdr, &hdr);
7284         if (status)
7285                 goto out;
7286         status = decode_sequence(xdr, &res->seq_res, rqstp);
7287         if (status)
7288                 goto out;
7289         status = decode_putrootfh(xdr);
7290         if (status)
7291                 goto out;
7292         status = decode_secinfo_no_name(xdr, res);
7293 out:
7294         return status;
7295 }
7296
7297 /*
7298  * Decode TEST_STATEID response
7299  */
7300 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7301                                      struct xdr_stream *xdr,
7302                                      void *data)
7303 {
7304         struct nfs41_test_stateid_res *res = data;
7305         struct compound_hdr hdr;
7306         int status;
7307
7308         status = decode_compound_hdr(xdr, &hdr);
7309         if (status)
7310                 goto out;
7311         status = decode_sequence(xdr, &res->seq_res, rqstp);
7312         if (status)
7313                 goto out;
7314         status = decode_test_stateid(xdr, res);
7315 out:
7316         return status;
7317 }
7318
7319 /*
7320  * Decode FREE_STATEID response
7321  */
7322 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7323                                      struct xdr_stream *xdr,
7324                                      void *data)
7325 {
7326         struct nfs41_free_stateid_res *res = data;
7327         struct compound_hdr hdr;
7328         int status;
7329
7330         status = decode_compound_hdr(xdr, &hdr);
7331         if (status)
7332                 goto out;
7333         status = decode_sequence(xdr, &res->seq_res, rqstp);
7334         if (status)
7335                 goto out;
7336         status = decode_free_stateid(xdr, res);
7337 out:
7338         return status;
7339 }
7340 #endif /* CONFIG_NFS_V4_1 */
7341
7342 /**
7343  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7344  *                      the local page cache.
7345  * @xdr: XDR stream where entry resides
7346  * @entry: buffer to fill in with entry data
7347  * @plus: boolean indicating whether this should be a readdirplus entry
7348  *
7349  * Returns zero if successful, otherwise a negative errno value is
7350  * returned.
7351  *
7352  * This function is not invoked during READDIR reply decoding, but
7353  * rather whenever an application invokes the getdents(2) system call
7354  * on a directory already in our cache.
7355  */
7356 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7357                        bool plus)
7358 {
7359         unsigned int savep;
7360         uint32_t bitmap[3] = {0};
7361         uint32_t len;
7362         uint64_t new_cookie;
7363         __be32 *p = xdr_inline_decode(xdr, 4);
7364         if (unlikely(!p))
7365                 return -EAGAIN;
7366         if (*p == xdr_zero) {
7367                 p = xdr_inline_decode(xdr, 4);
7368                 if (unlikely(!p))
7369                         return -EAGAIN;
7370                 if (*p == xdr_zero)
7371                         return -EAGAIN;
7372                 entry->eof = 1;
7373                 return -EBADCOOKIE;
7374         }
7375
7376         p = xdr_inline_decode(xdr, 12);
7377         if (unlikely(!p))
7378                 return -EAGAIN;
7379         p = xdr_decode_hyper(p, &new_cookie);
7380         entry->len = be32_to_cpup(p);
7381
7382         p = xdr_inline_decode(xdr, entry->len);
7383         if (unlikely(!p))
7384                 return -EAGAIN;
7385         entry->name = (const char *) p;
7386
7387         /*
7388          * In case the server doesn't return an inode number,
7389          * we fake one here.  (We don't use inode number 0,
7390          * since glibc seems to choke on it...)
7391          */
7392         entry->ino = 1;
7393         entry->fattr->valid = 0;
7394
7395         if (decode_attr_bitmap(xdr, bitmap) < 0)
7396                 return -EAGAIN;
7397
7398         if (decode_attr_length(xdr, &len, &savep) < 0)
7399                 return -EAGAIN;
7400
7401         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7402                         NULL, entry->label, entry->server) < 0)
7403                 return -EAGAIN;
7404         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7405                 entry->ino = entry->fattr->mounted_on_fileid;
7406         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7407                 entry->ino = entry->fattr->fileid;
7408
7409         entry->d_type = DT_UNKNOWN;
7410         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7411                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7412
7413         entry->prev_cookie = entry->cookie;
7414         entry->cookie = new_cookie;
7415
7416         return 0;
7417 }
7418
7419 /*
7420  * We need to translate between nfs status return values and
7421  * the local errno values which may not be the same.
7422  */
7423 static struct {
7424         int stat;
7425         int errno;
7426 } nfs_errtbl[] = {
7427         { NFS4_OK,              0               },
7428         { NFS4ERR_PERM,         -EPERM          },
7429         { NFS4ERR_NOENT,        -ENOENT         },
7430         { NFS4ERR_IO,           -errno_NFSERR_IO},
7431         { NFS4ERR_NXIO,         -ENXIO          },
7432         { NFS4ERR_ACCESS,       -EACCES         },
7433         { NFS4ERR_EXIST,        -EEXIST         },
7434         { NFS4ERR_XDEV,         -EXDEV          },
7435         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7436         { NFS4ERR_ISDIR,        -EISDIR         },
7437         { NFS4ERR_INVAL,        -EINVAL         },
7438         { NFS4ERR_FBIG,         -EFBIG          },
7439         { NFS4ERR_NOSPC,        -ENOSPC         },
7440         { NFS4ERR_ROFS,         -EROFS          },
7441         { NFS4ERR_MLINK,        -EMLINK         },
7442         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7443         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7444         { NFS4ERR_DQUOT,        -EDQUOT         },
7445         { NFS4ERR_STALE,        -ESTALE         },
7446         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7447         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7448         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7449         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7450         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7451         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7452         { NFS4ERR_LOCKED,       -EAGAIN         },
7453         { NFS4ERR_SYMLINK,      -ELOOP          },
7454         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7455         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7456         { -1,                   -EIO            }
7457 };
7458
7459 /*
7460  * Convert an NFS error code to a local one.
7461  * This one is used jointly by NFSv2 and NFSv3.
7462  */
7463 static int
7464 nfs4_stat_to_errno(int stat)
7465 {
7466         int i;
7467         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7468                 if (nfs_errtbl[i].stat == stat)
7469                         return nfs_errtbl[i].errno;
7470         }
7471         if (stat <= 10000 || stat > 10100) {
7472                 /* The server is looney tunes. */
7473                 return -EREMOTEIO;
7474         }
7475         /* If we cannot translate the error, the recovery routines should
7476          * handle it.
7477          * Note: remaining NFSv4 error codes have values > 10000, so should
7478          * not conflict with native Linux error codes.
7479          */
7480         return -stat;
7481 }
7482
7483 #ifdef CONFIG_NFS_V4_2
7484 #include "nfs42xdr.c"
7485 #endif /* CONFIG_NFS_V4_2 */
7486
7487 #define PROC(proc, argtype, restype)                            \
7488 [NFSPROC4_CLNT_##proc] = {                                      \
7489         .p_proc   = NFSPROC4_COMPOUND,                          \
7490         .p_encode = nfs4_xdr_##argtype,                         \
7491         .p_decode = nfs4_xdr_##restype,                         \
7492         .p_arglen = NFS4_##argtype##_sz,                        \
7493         .p_replen = NFS4_##restype##_sz,                        \
7494         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7495         .p_name   = #proc,                                      \
7496 }
7497
7498 #define STUB(proc)              \
7499 [NFSPROC4_CLNT_##proc] = {      \
7500         .p_name = #proc,        \
7501 }
7502
7503 #if defined(CONFIG_NFS_V4_1)
7504 #define PROC41(proc, argtype, restype)                          \
7505         PROC(proc, argtype, restype)
7506 #else
7507 #define PROC41(proc, argtype, restype)                          \
7508         STUB(proc)
7509 #endif
7510
7511 #if defined(CONFIG_NFS_V4_2)
7512 #define PROC42(proc, argtype, restype)                          \
7513         PROC(proc, argtype, restype)
7514 #else
7515 #define PROC42(proc, argtype, restype)                          \
7516         STUB(proc)
7517 #endif
7518
7519 const struct rpc_procinfo nfs4_procedures[] = {
7520         PROC(READ,              enc_read,               dec_read),
7521         PROC(WRITE,             enc_write,              dec_write),
7522         PROC(COMMIT,            enc_commit,             dec_commit),
7523         PROC(OPEN,              enc_open,               dec_open),
7524         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7525         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7526         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7527         PROC(CLOSE,             enc_close,              dec_close),
7528         PROC(SETATTR,           enc_setattr,            dec_setattr),
7529         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7530         PROC(RENEW,             enc_renew,              dec_renew),
7531         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7532         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7533         PROC(LOCK,              enc_lock,               dec_lock),
7534         PROC(LOCKT,             enc_lockt,              dec_lockt),
7535         PROC(LOCKU,             enc_locku,              dec_locku),
7536         PROC(ACCESS,            enc_access,             dec_access),
7537         PROC(GETATTR,           enc_getattr,            dec_getattr),
7538         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7539         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7540         PROC(REMOVE,            enc_remove,             dec_remove),
7541         PROC(RENAME,            enc_rename,             dec_rename),
7542         PROC(LINK,              enc_link,               dec_link),
7543         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7544         PROC(CREATE,            enc_create,             dec_create),
7545         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7546         PROC(STATFS,            enc_statfs,             dec_statfs),
7547         PROC(READLINK,          enc_readlink,           dec_readlink),
7548         PROC(READDIR,           enc_readdir,            dec_readdir),
7549         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7550         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7551         PROC(GETACL,            enc_getacl,             dec_getacl),
7552         PROC(SETACL,            enc_setacl,             dec_setacl),
7553         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7554         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7555         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7556         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7557         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7558         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7559         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7560         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7561         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7562         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7563         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7564         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7565         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7566         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7567         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7568         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7569         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7570         STUB(GETDEVICELIST),
7571         PROC41(BIND_CONN_TO_SESSION,
7572                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7573         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7574         PROC42(SEEK,            enc_seek,               dec_seek),
7575         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7576         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7577         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7578         PROC42(CLONE,           enc_clone,              dec_clone),
7579         PROC42(COPY,            enc_copy,               dec_copy),
7580         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7581         PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7582         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7583         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7584 };
7585
7586 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7587 const struct rpc_version nfs_version4 = {
7588         .number                 = 4,
7589         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7590         .procs                  = nfs4_procedures,
7591         .counts                 = nfs_version4_counts,
7592 };
7593
7594 /*
7595  * Local variables:
7596  *  c-basic-offset: 8
7597  * End:
7598  */