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 "internal.h"
  58 #include "nfs4idmap.h"
  59 #include "nfs4session.h"
  60 #include "pnfs.h"
  61 #include "netns.h"
  62
  63 #define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65 /* Mapping from NFS error code to "errno" error code. */
  66 #define errno_NFSERR_IO         EIO
  67
  68 struct compound_hdr;
  69 static int nfs4_stat_to_errno(int);
  70 static void encode_layoutget(struct xdr_stream *xdr,
  71                              const struct nfs4_layoutget_args *args,
  72                              struct compound_hdr *hdr);
  73 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
  74                              struct nfs4_layoutget_res *res);
  75
  76 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  77 #ifdef DEBUG
  78 #define NFS4_MAXTAGLEN          20
  79 #else
  80 #define NFS4_MAXTAGLEN          0
  81 #endif
  82
  83 /* lock,open owner id:
  84  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  85  */
  86 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  87 #define lock_owner_id_maxsz     (1 + 1 + 4)
  88 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  89 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  90 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  91 #define op_encode_hdr_maxsz     (1)
  92 #define op_decode_hdr_maxsz     (2)
  93 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  94 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  95 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  96 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  97 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  98                                 (NFS4_FHSIZE >> 2))
  99 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
 100 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 101 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 102 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 103 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 104                                 ((3+NFS4_FHSIZE) >> 2))
 105 #define nfs4_fattr_bitmap_maxsz 4
 106 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 107 #define nfstime4_maxsz          (3)
 108 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 109 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 110 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 111 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 112 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 113 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 114 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 115 #else
 116 #define nfs4_label_maxsz        0
 117 #endif
 118 /* We support only one layout type per file system */
 119 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 120 /* This is based on getfattr, which uses the most attributes: */
 121 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 122                                 3*nfstime4_maxsz + \
 123                                 nfs4_owner_maxsz + \
 124                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 125                                  decode_mdsthreshold_maxsz))
 126 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 127                                 nfs4_fattr_value_maxsz)
 128 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 129 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 130                                  1 + 2 + 1 + \
 131                                 nfs4_owner_maxsz + \
 132                                 nfs4_group_maxsz + \
 133                                 nfs4_label_maxsz + \
 134                                 1 + nfstime4_maxsz + \
 135                                 1 + nfstime4_maxsz)
 136 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 137 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 138 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 139 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 140 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 141 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 142  * layout types will be returned.
 143  */
 144 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 145                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 146 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 147 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 148 #define encode_setclientid_maxsz \
 149                                 (op_encode_hdr_maxsz + \
 150                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 151                                 /* client name */ \
 152                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 153                                 1 /* sc_prog */ + \
 154                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 155                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 156                                 1) /* sc_cb_ident */
 157 #define decode_setclientid_maxsz \
 158                                 (op_decode_hdr_maxsz + \
 159                                 2 /* clientid */ + \
 160                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 161                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 162                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 163 #define encode_setclientid_confirm_maxsz \
 164                                 (op_encode_hdr_maxsz + \
 165                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 166 #define decode_setclientid_confirm_maxsz \
 167                                 (op_decode_hdr_maxsz)
 168 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 169 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 170 #define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 171 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 172 #define encode_share_access_maxsz \
 173                                 (2)
 174 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 175 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 176 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 177 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 178                                 2 + encode_share_access_maxsz + 2 + \
 179                                 open_owner_id_maxsz + \
 180                                 encode_opentype_maxsz + \
 181                                 encode_claim_null_maxsz)
 182 #define decode_space_limit_maxsz        (3)
 183 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 184 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 185                                 decode_space_limit_maxsz + \
 186                                 decode_ace_maxsz)
 187 #define decode_change_info_maxsz        (5)
 188 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 189                                 decode_stateid_maxsz + \
 190                                 decode_change_info_maxsz + 1 + \
 191                                 nfs4_fattr_bitmap_maxsz + \
 192                                 decode_delegation_maxsz)
 193 #define encode_open_confirm_maxsz \
 194                                 (op_encode_hdr_maxsz + \
 195                                  encode_stateid_maxsz + 1)
 196 #define decode_open_confirm_maxsz \
 197                                 (op_decode_hdr_maxsz + \
 198                                  decode_stateid_maxsz)
 199 #define encode_open_downgrade_maxsz \
 200                                 (op_encode_hdr_maxsz + \
 201                                  encode_stateid_maxsz + 1 + \
 202                                  encode_share_access_maxsz)
 203 #define decode_open_downgrade_maxsz \
 204                                 (op_decode_hdr_maxsz + \
 205                                  decode_stateid_maxsz)
 206 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 207                                  1 + encode_stateid_maxsz)
 208 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 209                                  decode_stateid_maxsz)
 210 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 211                                  encode_stateid_maxsz + \
 212                                  encode_attrs_maxsz)
 213 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 214                                  nfs4_fattr_bitmap_maxsz)
 215 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 216                                  encode_stateid_maxsz + 3)
 217 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 218 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 219                                  2 + encode_verifier_maxsz + 5 + \
 220                                 nfs4_label_maxsz)
 221 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 222                                  decode_verifier_maxsz)
 223 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 224 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 225 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 226                                  encode_stateid_maxsz + 4)
 227 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 228                                  2 + decode_verifier_maxsz)
 229 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 230 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 231                                  decode_verifier_maxsz)
 232 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 233                                 nfs4_name_maxsz)
 234 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 235                                  decode_change_info_maxsz)
 236 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 237                                 2 * nfs4_name_maxsz)
 238 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 239                                  decode_change_info_maxsz + \
 240                                  decode_change_info_maxsz)
 241 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 242                                 nfs4_name_maxsz)
 243 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 244 #define encode_lockowner_maxsz  (7)
 245 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 246                                  7 + \
 247                                  1 + encode_stateid_maxsz + 1 + \
 248                                  encode_lockowner_maxsz)
 249 #define decode_lock_denied_maxsz \
 250                                 (8 + decode_lockowner_maxsz)
 251 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 252                                  decode_lock_denied_maxsz)
 253 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 254                                 encode_lockowner_maxsz)
 255 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 256                                  decode_lock_denied_maxsz)
 257 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 258                                  encode_stateid_maxsz + \
 259                                  4)
 260 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 261                                  decode_stateid_maxsz)
 262 #define encode_release_lockowner_maxsz \
 263                                 (op_encode_hdr_maxsz + \
 264                                  encode_lockowner_maxsz)
 265 #define decode_release_lockowner_maxsz \
 266                                 (op_decode_hdr_maxsz)
 267 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 268 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 269 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 270                                 1 + nfs4_name_maxsz + \
 271                                 1 + \
 272                                 nfs4_fattr_maxsz)
 273 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 274 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 275                                 1 + 2 + nfs4_name_maxsz + \
 276                                 encode_attrs_maxsz)
 277 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 278                                 decode_change_info_maxsz + \
 279                                 nfs4_fattr_bitmap_maxsz)
 280 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 281 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 282 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 283 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 284 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 285 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 286                                  nfs4_fattr_bitmap_maxsz + 1)
 287 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 288                                  encode_stateid_maxsz + 3)
 289 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 290 #define encode_fs_locations_maxsz \
 291                                 (encode_getattr_maxsz)
 292 #define decode_fs_locations_maxsz \
 293                                 (0)
 294 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 295 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 296
 297 #if defined(CONFIG_NFS_V4_1)
 298 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 299 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 300                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 301
 302 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 303                                 encode_verifier_maxsz + \
 304                                 1 /* co_ownerid.len */ + \
 305                                 /* eia_clientowner */ \
 306                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 307                                 1 /* flags */ + \
 308                                 1 /* spa_how */ + \
 309                                 /* max is SP4_MACH_CRED (for now) */ + \
 310                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 311                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 312                                 1 /* implementation id array of size 1 */ + \
 313                                 1 /* nii_domain */ + \
 314                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 315                                 1 /* nii_name */ + \
 316                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 317                                 3 /* nii_date */)
 318 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 319                                 2 /* eir_clientid */ + \
 320                                 1 /* eir_sequenceid */ + \
 321                                 1 /* eir_flags */ + \
 322                                 1 /* spr_how */ + \
 323                                   /* max is SP4_MACH_CRED (for now) */ + \
 324                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 325                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 326                                 2 /* eir_server_owner.so_minor_id */ + \
 327                                 /* eir_server_owner.so_major_id<> */ \
 328                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 329                                 /* eir_server_scope<> */ \
 330                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 331                                 1 /* eir_server_impl_id array length */ + \
 332                                 1 /* nii_domain */ + \
 333                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 334                                 1 /* nii_name */ + \
 335                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 336                                 3 /* nii_date */)
 337 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 338 #define decode_channel_attrs_maxsz  (6 + \
 339                                      1 /* ca_rdma_ird.len */ + \
 340                                      1 /* ca_rdma_ird */)
 341 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 342                                      2 /* csa_clientid */ + \
 343                                      1 /* csa_sequence */ + \
 344                                      1 /* csa_flags */ + \
 345                                      encode_channel_attrs_maxsz + \
 346                                      encode_channel_attrs_maxsz + \
 347                                      1 /* csa_cb_program */ + \
 348                                      1 /* csa_sec_parms.len (1) */ + \
 349                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 350                                      1 /* stamp */ + \
 351                                      1 /* machinename.len */ + \
 352                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 353                                      1 /* uid */ + \
 354                                      1 /* gid */ + \
 355                                      1 /* gids.len (0) */)
 356 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 357                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 358                                      1 /* csr_sequence */ + \
 359                                      1 /* csr_flags */ + \
 360                                      decode_channel_attrs_maxsz + \
 361                                      decode_channel_attrs_maxsz)
 362 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 363                                      /* bctsa_sessid */ \
 364                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 365                                      1 /* bctsa_dir */ + \
 366                                      1 /* bctsa_use_conn_in_rdma_mode */)
 367 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 368                                      /* bctsr_sessid */ \
 369                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 370                                      1 /* bctsr_dir */ + \
 371                                      1 /* bctsr_use_conn_in_rdma_mode */)
 372 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 373 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 374 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 375 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 376 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 377                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 378 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 379                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 380 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 381 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 382 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 383                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 384                                 1 /* layout type */ + \
 385                                 1 /* maxcount */ + \
 386                                 1 /* bitmap size */ + \
 387                                 1 /* notification bitmap length */ + \
 388                                 1 /* notification bitmap, word 0 */)
 389 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 390                                 1 /* layout type */ + \
 391                                 1 /* opaque devaddr4 length */ + \
 392                                   /* devaddr4 payload is read into page */ \
 393                                 1 /* notification bitmap length */ + \
 394                                 1 /* notification bitmap, word 0 */)
 395 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 396                                 encode_stateid_maxsz)
 397 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 398                                 decode_stateid_maxsz + \
 399                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 400 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 401                                 2 /* offset */ + \
 402                                 2 /* length */ + \
 403                                 1 /* reclaim */ + \
 404                                 encode_stateid_maxsz + \
 405                                 1 /* new offset (true) */ + \
 406                                 2 /* last byte written */ + \
 407                                 1 /* nt_timechanged (false) */ + \
 408                                 1 /* layoutupdate4 layout type */ + \
 409                                 1 /* layoutupdate4 opaqueue len */)
 410                                   /* the actual content of layoutupdate4 should
 411                                      be allocated by drivers and spliced in
 412                                      using xdr_write_pages */
 413 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 414 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 415                                 encode_stateid_maxsz + \
 416                                 1 + \
 417                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 418 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 419                                 1 + decode_stateid_maxsz)
 420 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 421 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 422 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 423                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 424 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 425 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 426                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 427 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 428 #else /* CONFIG_NFS_V4_1 */
 429 #define encode_sequence_maxsz   0
 430 #define decode_sequence_maxsz   0
 431 #define encode_layoutreturn_maxsz 0
 432 #define decode_layoutreturn_maxsz 0
 433 #define encode_layoutget_maxsz  0
 434 #define decode_layoutget_maxsz  0
 435 #endif /* CONFIG_NFS_V4_1 */
 436
 437 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 438 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 439 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 440                                 encode_sequence_maxsz + \
 441                                 encode_putfh_maxsz + \
 442                                 encode_read_maxsz)
 443 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 444                                 decode_sequence_maxsz + \
 445                                 decode_putfh_maxsz + \
 446                                 decode_read_maxsz)
 447 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 448                                 encode_sequence_maxsz + \
 449                                 encode_putfh_maxsz + \
 450                                 encode_readlink_maxsz)
 451 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 452                                 decode_sequence_maxsz + \
 453                                 decode_putfh_maxsz + \
 454                                 decode_readlink_maxsz)
 455 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 456                                 encode_sequence_maxsz + \
 457                                 encode_putfh_maxsz + \
 458                                 encode_readdir_maxsz)
 459 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 460                                 decode_sequence_maxsz + \
 461                                 decode_putfh_maxsz + \
 462                                 decode_readdir_maxsz)
 463 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 464                                 encode_sequence_maxsz + \
 465                                 encode_putfh_maxsz + \
 466                                 encode_write_maxsz + \
 467                                 encode_getattr_maxsz)
 468 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 469                                 decode_sequence_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_write_maxsz + \
 472                                 decode_getattr_maxsz)
 473 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 474                                 encode_sequence_maxsz + \
 475                                 encode_putfh_maxsz + \
 476                                 encode_commit_maxsz)
 477 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 478                                 decode_sequence_maxsz + \
 479                                 decode_putfh_maxsz + \
 480                                 decode_commit_maxsz)
 481 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 482                                 encode_sequence_maxsz + \
 483                                 encode_putfh_maxsz + \
 484                                 encode_open_maxsz + \
 485                                 encode_access_maxsz + \
 486                                 encode_getfh_maxsz + \
 487                                 encode_getattr_maxsz + \
 488                                 encode_layoutget_maxsz)
 489 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 490                                 decode_sequence_maxsz + \
 491                                 decode_putfh_maxsz + \
 492                                 decode_open_maxsz + \
 493                                 decode_access_maxsz + \
 494                                 decode_getfh_maxsz + \
 495                                 decode_getattr_maxsz + \
 496                                 decode_layoutget_maxsz)
 497 #define NFS4_enc_open_confirm_sz \
 498                                 (compound_encode_hdr_maxsz + \
 499                                  encode_putfh_maxsz + \
 500                                  encode_open_confirm_maxsz)
 501 #define NFS4_dec_open_confirm_sz \
 502                                 (compound_decode_hdr_maxsz + \
 503                                  decode_putfh_maxsz + \
 504                                  decode_open_confirm_maxsz)
 505 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 506                                         encode_sequence_maxsz + \
 507                                         encode_putfh_maxsz + \
 508                                         encode_open_maxsz + \
 509                                         encode_access_maxsz + \
 510                                         encode_getattr_maxsz + \
 511                                         encode_layoutget_maxsz)
 512 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 513                                         decode_sequence_maxsz + \
 514                                         decode_putfh_maxsz + \
 515                                         decode_open_maxsz + \
 516                                         decode_access_maxsz + \
 517                                         decode_getattr_maxsz + \
 518                                         decode_layoutget_maxsz)
 519 #define NFS4_enc_open_downgrade_sz \
 520                                 (compound_encode_hdr_maxsz + \
 521                                  encode_sequence_maxsz + \
 522                                  encode_putfh_maxsz + \
 523                                  encode_layoutreturn_maxsz + \
 524                                  encode_open_downgrade_maxsz)
 525 #define NFS4_dec_open_downgrade_sz \
 526                                 (compound_decode_hdr_maxsz + \
 527                                  decode_sequence_maxsz + \
 528                                  decode_putfh_maxsz + \
 529                                  decode_layoutreturn_maxsz + \
 530                                  decode_open_downgrade_maxsz)
 531 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 532                                  encode_sequence_maxsz + \
 533                                  encode_putfh_maxsz + \
 534                                  encode_layoutreturn_maxsz + \
 535                                  encode_close_maxsz + \
 536                                  encode_getattr_maxsz)
 537 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 538                                  decode_sequence_maxsz + \
 539                                  decode_putfh_maxsz + \
 540                                  decode_layoutreturn_maxsz + \
 541                                  decode_close_maxsz + \
 542                                  decode_getattr_maxsz)
 543 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 544                                  encode_sequence_maxsz + \
 545                                  encode_putfh_maxsz + \
 546                                  encode_setattr_maxsz + \
 547                                  encode_getattr_maxsz)
 548 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 549                                  decode_sequence_maxsz + \
 550                                  decode_putfh_maxsz + \
 551                                  decode_setattr_maxsz + \
 552                                  decode_getattr_maxsz)
 553 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 554                                 encode_sequence_maxsz + \
 555                                 encode_putfh_maxsz + \
 556                                 encode_fsinfo_maxsz)
 557 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 558                                 decode_sequence_maxsz + \
 559                                 decode_putfh_maxsz + \
 560                                 decode_fsinfo_maxsz)
 561 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 562                                 encode_renew_maxsz)
 563 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 564                                 decode_renew_maxsz)
 565 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 566                                 encode_setclientid_maxsz)
 567 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 568                                 decode_setclientid_maxsz)
 569 #define NFS4_enc_setclientid_confirm_sz \
 570                                 (compound_encode_hdr_maxsz + \
 571                                 encode_setclientid_confirm_maxsz)
 572 #define NFS4_dec_setclientid_confirm_sz \
 573                                 (compound_decode_hdr_maxsz + \
 574                                 decode_setclientid_confirm_maxsz)
 575 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 576                                 encode_sequence_maxsz + \
 577                                 encode_putfh_maxsz + \
 578                                 encode_lock_maxsz)
 579 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_lock_maxsz)
 583 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 584                                 encode_sequence_maxsz + \
 585                                 encode_putfh_maxsz + \
 586                                 encode_lockt_maxsz)
 587 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 588                                  decode_sequence_maxsz + \
 589                                  decode_putfh_maxsz + \
 590                                  decode_lockt_maxsz)
 591 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 592                                 encode_sequence_maxsz + \
 593                                 encode_putfh_maxsz + \
 594                                 encode_locku_maxsz)
 595 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_locku_maxsz)
 599 #define NFS4_enc_release_lockowner_sz \
 600                                 (compound_encode_hdr_maxsz + \
 601                                  encode_lockowner_maxsz)
 602 #define NFS4_dec_release_lockowner_sz \
 603                                 (compound_decode_hdr_maxsz + \
 604                                  decode_lockowner_maxsz)
 605 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 606                                 encode_sequence_maxsz + \
 607                                 encode_putfh_maxsz + \
 608                                 encode_access_maxsz + \
 609                                 encode_getattr_maxsz)
 610 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 611                                 decode_sequence_maxsz + \
 612                                 decode_putfh_maxsz + \
 613                                 decode_access_maxsz + \
 614                                 decode_getattr_maxsz)
 615 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 616                                 encode_sequence_maxsz + \
 617                                 encode_putfh_maxsz + \
 618                                 encode_getattr_maxsz + \
 619                                 encode_renew_maxsz)
 620 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 621                                 decode_sequence_maxsz + \
 622                                 decode_putfh_maxsz + \
 623                                 decode_getattr_maxsz + \
 624                                 decode_renew_maxsz)
 625 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 626                                 encode_sequence_maxsz + \
 627                                 encode_putfh_maxsz + \
 628                                 encode_lookup_maxsz + \
 629                                 encode_getattr_maxsz + \
 630                                 encode_getfh_maxsz)
 631 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 632                                 decode_sequence_maxsz + \
 633                                 decode_putfh_maxsz + \
 634                                 decode_lookup_maxsz + \
 635                                 decode_getattr_maxsz + \
 636                                 decode_getfh_maxsz)
 637 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 638                                 encode_sequence_maxsz + \
 639                                 encode_putfh_maxsz + \
 640                                 encode_lookupp_maxsz + \
 641                                 encode_getattr_maxsz + \
 642                                 encode_getfh_maxsz)
 643 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 644                                 decode_sequence_maxsz + \
 645                                 decode_putfh_maxsz + \
 646                                 decode_lookupp_maxsz + \
 647                                 decode_getattr_maxsz + \
 648                                 decode_getfh_maxsz)
 649 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 650                                 encode_sequence_maxsz + \
 651                                 encode_putrootfh_maxsz + \
 652                                 encode_getattr_maxsz + \
 653                                 encode_getfh_maxsz)
 654 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 655                                 decode_sequence_maxsz + \
 656                                 decode_putrootfh_maxsz + \
 657                                 decode_getattr_maxsz + \
 658                                 decode_getfh_maxsz)
 659 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 660                                 encode_sequence_maxsz + \
 661                                 encode_putfh_maxsz + \
 662                                 encode_remove_maxsz)
 663 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 664                                 decode_sequence_maxsz + \
 665                                 decode_putfh_maxsz + \
 666                                 decode_remove_maxsz)
 667 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 668                                 encode_sequence_maxsz + \
 669                                 encode_putfh_maxsz + \
 670                                 encode_savefh_maxsz + \
 671                                 encode_putfh_maxsz + \
 672                                 encode_rename_maxsz)
 673 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 674                                 decode_sequence_maxsz + \
 675                                 decode_putfh_maxsz + \
 676                                 decode_savefh_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_rename_maxsz)
 679 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 680                                 encode_sequence_maxsz + \
 681                                 encode_putfh_maxsz + \
 682                                 encode_savefh_maxsz + \
 683                                 encode_putfh_maxsz + \
 684                                 encode_link_maxsz + \
 685                                 encode_restorefh_maxsz + \
 686                                 encode_getattr_maxsz)
 687 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 688                                 decode_sequence_maxsz + \
 689                                 decode_putfh_maxsz + \
 690                                 decode_savefh_maxsz + \
 691                                 decode_putfh_maxsz + \
 692                                 decode_link_maxsz + \
 693                                 decode_restorefh_maxsz + \
 694                                 decode_getattr_maxsz)
 695 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 696                                 encode_sequence_maxsz + \
 697                                 encode_putfh_maxsz + \
 698                                 encode_symlink_maxsz + \
 699                                 encode_getattr_maxsz + \
 700                                 encode_getfh_maxsz)
 701 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 702                                 decode_sequence_maxsz + \
 703                                 decode_putfh_maxsz + \
 704                                 decode_symlink_maxsz + \
 705                                 decode_getattr_maxsz + \
 706                                 decode_getfh_maxsz)
 707 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 708                                 encode_sequence_maxsz + \
 709                                 encode_putfh_maxsz + \
 710                                 encode_create_maxsz + \
 711                                 encode_getfh_maxsz + \
 712                                 encode_getattr_maxsz)
 713 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 714                                 decode_sequence_maxsz + \
 715                                 decode_putfh_maxsz + \
 716                                 decode_create_maxsz + \
 717                                 decode_getfh_maxsz + \
 718                                 decode_getattr_maxsz)
 719 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 720                                 encode_sequence_maxsz + \
 721                                 encode_putfh_maxsz + \
 722                                 encode_getattr_maxsz)
 723 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 724                                 decode_sequence_maxsz + \
 725                                 decode_putfh_maxsz + \
 726                                 decode_getattr_maxsz)
 727 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 728                                 encode_sequence_maxsz + \
 729                                 encode_putfh_maxsz + \
 730                                 encode_statfs_maxsz)
 731 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 732                                 decode_sequence_maxsz + \
 733                                 decode_putfh_maxsz + \
 734                                 decode_statfs_maxsz)
 735 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 736                                 encode_sequence_maxsz + \
 737                                 encode_putfh_maxsz + \
 738                                 encode_getattr_maxsz)
 739 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 740                                 decode_sequence_maxsz + \
 741                                 decode_putfh_maxsz + \
 742                                 decode_getattr_maxsz)
 743 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 744                                 encode_sequence_maxsz + \
 745                                 encode_putfh_maxsz + \
 746                                 encode_layoutreturn_maxsz + \
 747                                 encode_delegreturn_maxsz + \
 748                                 encode_getattr_maxsz)
 749 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 750                                 decode_sequence_maxsz + \
 751                                 decode_putfh_maxsz + \
 752                                 decode_layoutreturn_maxsz + \
 753                                 decode_delegreturn_maxsz + \
 754                                 decode_getattr_maxsz)
 755 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 756                                 encode_sequence_maxsz + \
 757                                 encode_putfh_maxsz + \
 758                                 encode_getacl_maxsz)
 759 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 760                                 decode_sequence_maxsz + \
 761                                 decode_putfh_maxsz + \
 762                                 decode_getacl_maxsz)
 763 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 764                                 encode_sequence_maxsz + \
 765                                 encode_putfh_maxsz + \
 766                                 encode_setacl_maxsz)
 767 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 768                                 decode_sequence_maxsz + \
 769                                 decode_putfh_maxsz + \
 770                                 decode_setacl_maxsz)
 771 #define NFS4_enc_fs_locations_sz \
 772                                 (compound_encode_hdr_maxsz + \
 773                                  encode_sequence_maxsz + \
 774                                  encode_putfh_maxsz + \
 775                                  encode_lookup_maxsz + \
 776                                  encode_fs_locations_maxsz + \
 777                                  encode_renew_maxsz)
 778 #define NFS4_dec_fs_locations_sz \
 779                                 (compound_decode_hdr_maxsz + \
 780                                  decode_sequence_maxsz + \
 781                                  decode_putfh_maxsz + \
 782                                  decode_lookup_maxsz + \
 783                                  decode_fs_locations_maxsz + \
 784                                  decode_renew_maxsz)
 785 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 786                                 encode_sequence_maxsz + \
 787                                 encode_putfh_maxsz + \
 788                                 encode_secinfo_maxsz)
 789 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 790                                 decode_sequence_maxsz + \
 791                                 decode_putfh_maxsz + \
 792                                 decode_secinfo_maxsz)
 793 #define NFS4_enc_fsid_present_sz \
 794                                 (compound_encode_hdr_maxsz + \
 795                                  encode_sequence_maxsz + \
 796                                  encode_putfh_maxsz + \
 797                                  encode_getfh_maxsz + \
 798                                  encode_renew_maxsz)
 799 #define NFS4_dec_fsid_present_sz \
 800                                 (compound_decode_hdr_maxsz + \
 801                                  decode_sequence_maxsz + \
 802                                  decode_putfh_maxsz + \
 803                                  decode_getfh_maxsz + \
 804                                  decode_renew_maxsz)
 805 #if defined(CONFIG_NFS_V4_1)
 806 #define NFS4_enc_bind_conn_to_session_sz \
 807                                 (compound_encode_hdr_maxsz + \
 808                                  encode_bind_conn_to_session_maxsz)
 809 #define NFS4_dec_bind_conn_to_session_sz \
 810                                 (compound_decode_hdr_maxsz + \
 811                                  decode_bind_conn_to_session_maxsz)
 812 #define NFS4_enc_exchange_id_sz \
 813                                 (compound_encode_hdr_maxsz + \
 814                                  encode_exchange_id_maxsz)
 815 #define NFS4_dec_exchange_id_sz \
 816                                 (compound_decode_hdr_maxsz + \
 817                                  decode_exchange_id_maxsz)
 818 #define NFS4_enc_create_session_sz \
 819                                 (compound_encode_hdr_maxsz + \
 820                                  encode_create_session_maxsz)
 821 #define NFS4_dec_create_session_sz \
 822                                 (compound_decode_hdr_maxsz + \
 823                                  decode_create_session_maxsz)
 824 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 825                                          encode_destroy_session_maxsz)
 826 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 827                                          decode_destroy_session_maxsz)
 828 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 829                                          encode_destroy_clientid_maxsz)
 830 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 831                                          decode_destroy_clientid_maxsz)
 832 #define NFS4_enc_sequence_sz \
 833                                 (compound_decode_hdr_maxsz + \
 834                                  encode_sequence_maxsz)
 835 #define NFS4_dec_sequence_sz \
 836                                 (compound_decode_hdr_maxsz + \
 837                                  decode_sequence_maxsz)
 838 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 839                                          encode_sequence_maxsz + \
 840                                          encode_putrootfh_maxsz + \
 841                                          encode_fsinfo_maxsz)
 842 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 843                                          decode_sequence_maxsz + \
 844                                          decode_putrootfh_maxsz + \
 845                                          decode_fsinfo_maxsz)
 846 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 847                                          encode_sequence_maxsz + \
 848                                          encode_reclaim_complete_maxsz)
 849 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 850                                          decode_sequence_maxsz + \
 851                                          decode_reclaim_complete_maxsz)
 852 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 853                                 encode_sequence_maxsz +\
 854                                 encode_getdeviceinfo_maxsz)
 855 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 856                                 decode_sequence_maxsz + \
 857                                 decode_getdeviceinfo_maxsz)
 858 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 859                                 encode_sequence_maxsz + \
 860                                 encode_putfh_maxsz +        \
 861                                 encode_layoutget_maxsz)
 862 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 863                                 decode_sequence_maxsz + \
 864                                 decode_putfh_maxsz +        \
 865                                 decode_layoutget_maxsz)
 866 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 867                                 encode_sequence_maxsz +\
 868                                 encode_putfh_maxsz + \
 869                                 encode_layoutcommit_maxsz + \
 870                                 encode_getattr_maxsz)
 871 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 872                                 decode_sequence_maxsz + \
 873                                 decode_putfh_maxsz + \
 874                                 decode_layoutcommit_maxsz + \
 875                                 decode_getattr_maxsz)
 876 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 877                                 encode_sequence_maxsz + \
 878                                 encode_putfh_maxsz + \
 879                                 encode_layoutreturn_maxsz)
 880 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 881                                 decode_sequence_maxsz + \
 882                                 decode_putfh_maxsz + \
 883                                 decode_layoutreturn_maxsz)
 884 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 885                                         encode_sequence_maxsz + \
 886                                         encode_putrootfh_maxsz +\
 887                                         encode_secinfo_no_name_maxsz)
 888 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 889                                         decode_sequence_maxsz + \
 890                                         decode_putrootfh_maxsz + \
 891                                         decode_secinfo_no_name_maxsz)
 892 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 893                                          encode_sequence_maxsz + \
 894                                          encode_test_stateid_maxsz)
 895 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 896                                          decode_sequence_maxsz + \
 897                                          decode_test_stateid_maxsz)
 898 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 899                                          encode_sequence_maxsz + \
 900                                          encode_free_stateid_maxsz)
 901 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 902                                          decode_sequence_maxsz + \
 903                                          decode_free_stateid_maxsz)
 904
 905 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 906                                       compound_encode_hdr_maxsz +
 907                                       encode_sequence_maxsz +
 908                                       encode_putfh_maxsz +
 909                                       encode_getattr_maxsz) *
 910                                      XDR_UNIT);
 911
 912 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 913                                      compound_decode_hdr_maxsz +
 914                                      decode_sequence_maxsz +
 915                                      decode_putfh_maxsz) *
 916                                     XDR_UNIT);
 917
 918 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 919                                            compound_decode_hdr_maxsz +
 920                                            decode_sequence_maxsz) *
 921                                           XDR_UNIT);
 922 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 923 #endif /* CONFIG_NFS_V4_1 */
 924
 925 static const umode_t nfs_type2fmt[] = {
 926         [NF4BAD] = 0,
 927         [NF4REG] = S_IFREG,
 928         [NF4DIR] = S_IFDIR,
 929         [NF4BLK] = S_IFBLK,
 930         [NF4CHR] = S_IFCHR,
 931         [NF4LNK] = S_IFLNK,
 932         [NF4SOCK] = S_IFSOCK,
 933         [NF4FIFO] = S_IFIFO,
 934         [NF4ATTRDIR] = 0,
 935         [NF4NAMEDATTR] = 0,
 936 };
 937
 938 struct compound_hdr {
 939         int32_t         status;
 940         uint32_t        nops;
 941         __be32 *        nops_p;
 942         uint32_t        taglen;
 943         char *          tag;
 944         uint32_t        replen;         /* expected reply words */
 945         u32             minorversion;
 946 };
 947
 948 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 949 {
 950         __be32 *p = xdr_reserve_space(xdr, nbytes);
 951         BUG_ON(!p);
 952         return p;
 953 }
 954
 955 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 956 {
 957         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 958 }
 959
 960 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 961 {
 962         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 963 }
 964
 965 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 966 {
 967         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 968 }
 969
 970 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 971 {
 972         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 973 }
 974
 975 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 976                 const __u32 *bitmap, size_t len)
 977 {
 978         ssize_t ret;
 979
 980         /* Trim empty words */
 981         while (len > 0 && bitmap[len-1] == 0)
 982                 len--;
 983         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 984         if (WARN_ON_ONCE(ret < 0))
 985                 return ret;
 986         return len;
 987 }
 988
 989 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 990                 __u32 *res, size_t len)
 991 {
 992         size_t i;
 993         __u32 tmp;
 994
 995         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
 996                 len--;
 997         for (i = len; i-- > 0;) {
 998                 tmp = bitmap[i] & mask[i];
 999                 res[i] = tmp;
1000         }
1001         return len;
1002 }
1003
1004 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1005                 const struct nfs_seqid *seqid)
1006 {
1007         if (seqid != NULL)
1008                 encode_uint32(xdr, seqid->sequence->counter);
1009         else
1010                 encode_uint32(xdr, 0);
1011 }
1012
1013 static void encode_compound_hdr(struct xdr_stream *xdr,
1014                                 struct rpc_rqst *req,
1015                                 struct compound_hdr *hdr)
1016 {
1017         __be32 *p;
1018         struct rpc_auth *auth = req->rq_cred->cr_auth;
1019
1020         /* initialize running count of expected bytes in reply.
1021          * NOTE: the replied tag SHOULD be the same is the one sent,
1022          * but this is not required as a MUST for the server to do so. */
1023         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
1024
1025         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1026         encode_string(xdr, hdr->taglen, hdr->tag);
1027         p = reserve_space(xdr, 8);
1028         *p++ = cpu_to_be32(hdr->minorversion);
1029         hdr->nops_p = p;
1030         *p = cpu_to_be32(hdr->nops);
1031 }
1032
1033 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1034                 uint32_t replen,
1035                 struct compound_hdr *hdr)
1036 {
1037         encode_uint32(xdr, op);
1038         hdr->nops++;
1039         hdr->replen += replen;
1040 }
1041
1042 static void encode_nops(struct compound_hdr *hdr)
1043 {
1044         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1045         *hdr->nops_p = htonl(hdr->nops);
1046 }
1047
1048 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1049 {
1050         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1051 }
1052
1053 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1054 {
1055         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1056 }
1057
1058 static __be32 *
1059 xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1060 {
1061         p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1062         *p++ = cpu_to_be32(t->tv_nsec);
1063         return p;
1064 }
1065
1066 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1067                                 const struct nfs4_label *label,
1068                                 const umode_t *umask,
1069                                 const struct nfs_server *server,
1070                                 const uint32_t attrmask[])
1071 {
1072         struct timespec ts;
1073         char owner_name[IDMAP_NAMESZ];
1074         char owner_group[IDMAP_NAMESZ];
1075         int owner_namelen = 0;
1076         int owner_grouplen = 0;
1077         __be32 *p;
1078         uint32_t len = 0;
1079         uint32_t bmval[3] = { 0 };
1080
1081         /*
1082          * We reserve enough space to write the entire attribute buffer at once.
1083          */
1084         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1085                 bmval[0] |= FATTR4_WORD0_SIZE;
1086                 len += 8;
1087         }
1088         if (iap->ia_valid & ATTR_MODE) {
1089                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1090                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1091                         len += 8;
1092                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1093                         bmval[1] |= FATTR4_WORD1_MODE;
1094                         len += 4;
1095                 }
1096         }
1097         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1098                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1099                 if (owner_namelen < 0) {
1100                         dprintk("nfs: couldn't resolve uid %d to string\n",
1101                                         from_kuid(&init_user_ns, iap->ia_uid));
1102                         /* XXX */
1103                         strcpy(owner_name, "nobody");
1104                         owner_namelen = sizeof("nobody") - 1;
1105                         /* goto out; */
1106                 }
1107                 bmval[1] |= FATTR4_WORD1_OWNER;
1108                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1109         }
1110         if ((iap->ia_valid & ATTR_GID) &&
1111            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1112                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1113                 if (owner_grouplen < 0) {
1114                         dprintk("nfs: couldn't resolve gid %d to string\n",
1115                                         from_kgid(&init_user_ns, iap->ia_gid));
1116                         strcpy(owner_group, "nobody");
1117                         owner_grouplen = sizeof("nobody") - 1;
1118                         /* goto out; */
1119                 }
1120                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1121                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1122         }
1123         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1124                 if (iap->ia_valid & ATTR_ATIME_SET) {
1125                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1126                         len += 4 + (nfstime4_maxsz << 2);
1127                 } else if (iap->ia_valid & ATTR_ATIME) {
1128                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1129                         len += 4;
1130                 }
1131         }
1132         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1133                 if (iap->ia_valid & ATTR_MTIME_SET) {
1134                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1135                         len += 4 + (nfstime4_maxsz << 2);
1136                 } else if (iap->ia_valid & ATTR_MTIME) {
1137                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1138                         len += 4;
1139                 }
1140         }
1141
1142         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1143                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1144                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1145         }
1146
1147         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1148         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1149
1150         if (bmval[0] & FATTR4_WORD0_SIZE)
1151                 p = xdr_encode_hyper(p, iap->ia_size);
1152         if (bmval[1] & FATTR4_WORD1_MODE)
1153                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1154         if (bmval[1] & FATTR4_WORD1_OWNER)
1155                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1156         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1157                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1158         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1159                 if (iap->ia_valid & ATTR_ATIME_SET) {
1160                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1161                         ts = timespec64_to_timespec(iap->ia_atime);
1162                         p = xdr_encode_nfstime4(p, &ts);
1163                 } else
1164                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1165         }
1166         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1167                 if (iap->ia_valid & ATTR_MTIME_SET) {
1168                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1169                         ts = timespec64_to_timespec(iap->ia_mtime);
1170                         p = xdr_encode_nfstime4(p, &ts);
1171                 } else
1172                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1173         }
1174         if (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                 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2344                                  args->lg_args->layout.pages,
2345                                  0, args->lg_args->layout.pglen);
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                 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2390                                  args->lg_args->layout.pages,
2391                                  0, args->lg_args->layout.pglen);
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         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2502                         args->pgbase, args->pglen);
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         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2523                          args->pgbase, args->count);
2524         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2525                         __func__, hdr.replen << 2, args->pages,
2526                         args->pgbase, args->count);
2527         encode_nops(&hdr);
2528 }
2529
2530 /*
2531  * Encode a READ request
2532  */
2533 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2534                               const void *data)
2535 {
2536         const struct nfs_pgio_args *args = data;
2537         struct compound_hdr hdr = {
2538                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539         };
2540
2541         encode_compound_hdr(xdr, req, &hdr);
2542         encode_sequence(xdr, &args->seq_args, &hdr);
2543         encode_putfh(xdr, args->fh, &hdr);
2544         encode_read(xdr, args, &hdr);
2545
2546         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2547                          args->pages, args->pgbase, args->count);
2548         req->rq_rcv_buf.flags |= XDRBUF_READ;
2549         encode_nops(&hdr);
2550 }
2551
2552 /*
2553  * Encode an SETATTR request
2554  */
2555 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2556                                  const void *data)
2557 {
2558         const struct nfs_setattrargs *args = data;
2559         struct compound_hdr hdr = {
2560                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561         };
2562
2563         encode_compound_hdr(xdr, req, &hdr);
2564         encode_sequence(xdr, &args->seq_args, &hdr);
2565         encode_putfh(xdr, args->fh, &hdr);
2566         encode_setattr(xdr, args, args->server, &hdr);
2567         encode_getfattr(xdr, args->bitmask, &hdr);
2568         encode_nops(&hdr);
2569 }
2570
2571 /*
2572  * Encode a GETACL request
2573  */
2574 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2575                                 const void *data)
2576 {
2577         const struct nfs_getaclargs *args = data;
2578         struct compound_hdr hdr = {
2579                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2580         };
2581         const __u32 nfs4_acl_bitmap[1] = {
2582                 [0] = FATTR4_WORD0_ACL,
2583         };
2584         uint32_t replen;
2585
2586         encode_compound_hdr(xdr, req, &hdr);
2587         encode_sequence(xdr, &args->seq_args, &hdr);
2588         encode_putfh(xdr, args->fh, &hdr);
2589         replen = hdr.replen + op_decode_hdr_maxsz;
2590         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2591                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2592
2593         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2594                 args->acl_pages, 0, args->acl_len);
2595
2596         encode_nops(&hdr);
2597 }
2598
2599 /*
2600  * Encode a WRITE request
2601  */
2602 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2603                                const void *data)
2604 {
2605         const struct nfs_pgio_args *args = data;
2606         struct compound_hdr hdr = {
2607                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2608         };
2609
2610         encode_compound_hdr(xdr, req, &hdr);
2611         encode_sequence(xdr, &args->seq_args, &hdr);
2612         encode_putfh(xdr, args->fh, &hdr);
2613         encode_write(xdr, args, &hdr);
2614         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2615         if (args->bitmask)
2616                 encode_getfattr(xdr, args->bitmask, &hdr);
2617         encode_nops(&hdr);
2618 }
2619
2620 /*
2621  *  a COMMIT request
2622  */
2623 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2624                                 const void *data)
2625 {
2626         const struct nfs_commitargs *args = data;
2627         struct compound_hdr hdr = {
2628                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2629         };
2630
2631         encode_compound_hdr(xdr, req, &hdr);
2632         encode_sequence(xdr, &args->seq_args, &hdr);
2633         encode_putfh(xdr, args->fh, &hdr);
2634         encode_commit(xdr, args, &hdr);
2635         encode_nops(&hdr);
2636 }
2637
2638 /*
2639  * FSINFO request
2640  */
2641 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2642                                 const void *data)
2643 {
2644         const struct nfs4_fsinfo_arg *args = data;
2645         struct compound_hdr hdr = {
2646                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2647         };
2648
2649         encode_compound_hdr(xdr, req, &hdr);
2650         encode_sequence(xdr, &args->seq_args, &hdr);
2651         encode_putfh(xdr, args->fh, &hdr);
2652         encode_fsinfo(xdr, args->bitmask, &hdr);
2653         encode_nops(&hdr);
2654 }
2655
2656 /*
2657  * a PATHCONF request
2658  */
2659 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2660                                   const void *data)
2661 {
2662         const struct nfs4_pathconf_arg *args = data;
2663         struct compound_hdr hdr = {
2664                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2665         };
2666
2667         encode_compound_hdr(xdr, req, &hdr);
2668         encode_sequence(xdr, &args->seq_args, &hdr);
2669         encode_putfh(xdr, args->fh, &hdr);
2670         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2671                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2672         encode_nops(&hdr);
2673 }
2674
2675 /*
2676  * a STATFS request
2677  */
2678 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2679                                 const void *data)
2680 {
2681         const struct nfs4_statfs_arg *args = data;
2682         struct compound_hdr hdr = {
2683                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2684         };
2685
2686         encode_compound_hdr(xdr, req, &hdr);
2687         encode_sequence(xdr, &args->seq_args, &hdr);
2688         encode_putfh(xdr, args->fh, &hdr);
2689         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2690                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2691         encode_nops(&hdr);
2692 }
2693
2694 /*
2695  * GETATTR_BITMAP request
2696  */
2697 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2698                                      struct xdr_stream *xdr,
2699                                      const void *data)
2700 {
2701         const struct nfs4_server_caps_arg *args = data;
2702         const u32 *bitmask = args->bitmask;
2703         struct compound_hdr hdr = {
2704                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2705         };
2706
2707         encode_compound_hdr(xdr, req, &hdr);
2708         encode_sequence(xdr, &args->seq_args, &hdr);
2709         encode_putfh(xdr, args->fhandle, &hdr);
2710         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2711         encode_nops(&hdr);
2712 }
2713
2714 /*
2715  * a RENEW request
2716  */
2717 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2718                                const void *data)
2719
2720 {
2721         const struct nfs_client *clp = data;
2722         struct compound_hdr hdr = {
2723                 .nops   = 0,
2724         };
2725
2726         encode_compound_hdr(xdr, req, &hdr);
2727         encode_renew(xdr, clp->cl_clientid, &hdr);
2728         encode_nops(&hdr);
2729 }
2730
2731 /*
2732  * a SETCLIENTID request
2733  */
2734 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2735                                      struct xdr_stream *xdr,
2736                                      const void *data)
2737 {
2738         const struct nfs4_setclientid *sc = data;
2739         struct compound_hdr hdr = {
2740                 .nops   = 0,
2741         };
2742
2743         encode_compound_hdr(xdr, req, &hdr);
2744         encode_setclientid(xdr, sc, &hdr);
2745         encode_nops(&hdr);
2746 }
2747
2748 /*
2749  * a SETCLIENTID_CONFIRM request
2750  */
2751 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2752                                              struct xdr_stream *xdr,
2753                                              const void *data)
2754 {
2755         const struct nfs4_setclientid_res *arg = data;
2756         struct compound_hdr hdr = {
2757                 .nops   = 0,
2758         };
2759
2760         encode_compound_hdr(xdr, req, &hdr);
2761         encode_setclientid_confirm(xdr, arg, &hdr);
2762         encode_nops(&hdr);
2763 }
2764
2765 /*
2766  * DELEGRETURN request
2767  */
2768 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2769                                      struct xdr_stream *xdr,
2770                                      const void *data)
2771 {
2772         const struct nfs4_delegreturnargs *args = data;
2773         struct compound_hdr hdr = {
2774                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2775         };
2776
2777         encode_compound_hdr(xdr, req, &hdr);
2778         encode_sequence(xdr, &args->seq_args, &hdr);
2779         encode_putfh(xdr, args->fhandle, &hdr);
2780         if (args->lr_args)
2781                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2782         if (args->bitmask)
2783                 encode_getfattr(xdr, args->bitmask, &hdr);
2784         encode_delegreturn(xdr, args->stateid, &hdr);
2785         encode_nops(&hdr);
2786 }
2787
2788 /*
2789  * Encode FS_LOCATIONS request
2790  */
2791 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2792                                       struct xdr_stream *xdr,
2793                                       const void *data)
2794 {
2795         const struct nfs4_fs_locations_arg *args = data;
2796         struct compound_hdr hdr = {
2797                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2798         };
2799         uint32_t replen;
2800
2801         encode_compound_hdr(xdr, req, &hdr);
2802         encode_sequence(xdr, &args->seq_args, &hdr);
2803         if (args->migration) {
2804                 encode_putfh(xdr, args->fh, &hdr);
2805                 replen = hdr.replen;
2806                 encode_fs_locations(xdr, args->bitmask, &hdr);
2807                 if (args->renew)
2808                         encode_renew(xdr, args->clientid, &hdr);
2809         } else {
2810                 encode_putfh(xdr, args->dir_fh, &hdr);
2811                 encode_lookup(xdr, args->name, &hdr);
2812                 replen = hdr.replen;
2813                 encode_fs_locations(xdr, args->bitmask, &hdr);
2814         }
2815
2816         /* Set up reply kvec to capture returned fs_locations array. */
2817         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2818                          (struct page **)&args->page, 0, PAGE_SIZE);
2819         encode_nops(&hdr);
2820 }
2821
2822 /*
2823  * Encode SECINFO request
2824  */
2825 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2826                                 struct xdr_stream *xdr,
2827                                 const void *data)
2828 {
2829         const struct nfs4_secinfo_arg *args = data;
2830         struct compound_hdr hdr = {
2831                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2832         };
2833
2834         encode_compound_hdr(xdr, req, &hdr);
2835         encode_sequence(xdr, &args->seq_args, &hdr);
2836         encode_putfh(xdr, args->dir_fh, &hdr);
2837         encode_secinfo(xdr, args->name, &hdr);
2838         encode_nops(&hdr);
2839 }
2840
2841 /*
2842  * Encode FSID_PRESENT request
2843  */
2844 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2845                                       struct xdr_stream *xdr,
2846                                       const void *data)
2847 {
2848         const struct nfs4_fsid_present_arg *args = data;
2849         struct compound_hdr hdr = {
2850                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2851         };
2852
2853         encode_compound_hdr(xdr, req, &hdr);
2854         encode_sequence(xdr, &args->seq_args, &hdr);
2855         encode_putfh(xdr, args->fh, &hdr);
2856         encode_getfh(xdr, &hdr);
2857         if (args->renew)
2858                 encode_renew(xdr, args->clientid, &hdr);
2859         encode_nops(&hdr);
2860 }
2861
2862 #if defined(CONFIG_NFS_V4_1)
2863 /*
2864  * BIND_CONN_TO_SESSION request
2865  */
2866 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2867                                 struct xdr_stream *xdr,
2868                                 const void *data)
2869 {
2870         const struct nfs41_bind_conn_to_session_args *args = data;
2871         struct compound_hdr hdr = {
2872                 .minorversion = args->client->cl_mvops->minor_version,
2873         };
2874
2875         encode_compound_hdr(xdr, req, &hdr);
2876         encode_bind_conn_to_session(xdr, args, &hdr);
2877         encode_nops(&hdr);
2878 }
2879
2880 /*
2881  * EXCHANGE_ID request
2882  */
2883 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2884                                      struct xdr_stream *xdr,
2885                                      const void *data)
2886 {
2887         const struct nfs41_exchange_id_args *args = data;
2888         struct compound_hdr hdr = {
2889                 .minorversion = args->client->cl_mvops->minor_version,
2890         };
2891
2892         encode_compound_hdr(xdr, req, &hdr);
2893         encode_exchange_id(xdr, args, &hdr);
2894         encode_nops(&hdr);
2895 }
2896
2897 /*
2898  * a CREATE_SESSION request
2899  */
2900 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2901                                         struct xdr_stream *xdr,
2902                                         const void *data)
2903 {
2904         const struct nfs41_create_session_args *args = data;
2905         struct compound_hdr hdr = {
2906                 .minorversion = args->client->cl_mvops->minor_version,
2907         };
2908
2909         encode_compound_hdr(xdr, req, &hdr);
2910         encode_create_session(xdr, args, &hdr);
2911         encode_nops(&hdr);
2912 }
2913
2914 /*
2915  * a DESTROY_SESSION request
2916  */
2917 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2918                                          struct xdr_stream *xdr,
2919                                          const void *data)
2920 {
2921         const struct nfs4_session *session = data;
2922         struct compound_hdr hdr = {
2923                 .minorversion = session->clp->cl_mvops->minor_version,
2924         };
2925
2926         encode_compound_hdr(xdr, req, &hdr);
2927         encode_destroy_session(xdr, session, &hdr);
2928         encode_nops(&hdr);
2929 }
2930
2931 /*
2932  * a DESTROY_CLIENTID request
2933  */
2934 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2935                                          struct xdr_stream *xdr,
2936                                          const void *data)
2937 {
2938         const struct nfs_client *clp = data;
2939         struct compound_hdr hdr = {
2940                 .minorversion = clp->cl_mvops->minor_version,
2941         };
2942
2943         encode_compound_hdr(xdr, req, &hdr);
2944         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2945         encode_nops(&hdr);
2946 }
2947
2948 /*
2949  * a SEQUENCE request
2950  */
2951 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2952                                   const void *data)
2953 {
2954         const struct nfs4_sequence_args *args = data;
2955         struct compound_hdr hdr = {
2956                 .minorversion = nfs4_xdr_minorversion(args),
2957         };
2958
2959         encode_compound_hdr(xdr, req, &hdr);
2960         encode_sequence(xdr, args, &hdr);
2961         encode_nops(&hdr);
2962 }
2963
2964 /*
2965  * a GET_LEASE_TIME request
2966  */
2967 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2968                                         struct xdr_stream *xdr,
2969                                         const void *data)
2970 {
2971         const struct nfs4_get_lease_time_args *args = data;
2972         struct compound_hdr hdr = {
2973                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2974         };
2975         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2976
2977         encode_compound_hdr(xdr, req, &hdr);
2978         encode_sequence(xdr, &args->la_seq_args, &hdr);
2979         encode_putrootfh(xdr, &hdr);
2980         encode_fsinfo(xdr, lease_bitmap, &hdr);
2981         encode_nops(&hdr);
2982 }
2983
2984 /*
2985  * a RECLAIM_COMPLETE request
2986  */
2987 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2988                                           struct xdr_stream *xdr,
2989                                           const void *data)
2990 {
2991         const struct nfs41_reclaim_complete_args *args = data;
2992         struct compound_hdr hdr = {
2993                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2994         };
2995
2996         encode_compound_hdr(xdr, req, &hdr);
2997         encode_sequence(xdr, &args->seq_args, &hdr);
2998         encode_reclaim_complete(xdr, args, &hdr);
2999         encode_nops(&hdr);
3000 }
3001
3002 /*
3003  * Encode GETDEVICEINFO request
3004  */
3005 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3006                                        struct xdr_stream *xdr,
3007                                        const void *data)
3008 {
3009         const struct nfs4_getdeviceinfo_args *args = data;
3010         struct compound_hdr hdr = {
3011                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3012         };
3013
3014         encode_compound_hdr(xdr, req, &hdr);
3015         encode_sequence(xdr, &args->seq_args, &hdr);
3016         encode_getdeviceinfo(xdr, args, &hdr);
3017
3018         /* set up reply kvec. Subtract notification bitmap max size (2)
3019          * so that notification bitmap is put in xdr_buf tail */
3020         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
3021                          args->pdev->pages, args->pdev->pgbase,
3022                          args->pdev->pglen);
3023
3024         encode_nops(&hdr);
3025 }
3026
3027 /*
3028  *  Encode LAYOUTGET request
3029  */
3030 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3031                                    struct xdr_stream *xdr,
3032                                    const void *data)
3033 {
3034         const struct nfs4_layoutget_args *args = data;
3035         struct compound_hdr hdr = {
3036                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3037         };
3038
3039         encode_compound_hdr(xdr, req, &hdr);
3040         encode_sequence(xdr, &args->seq_args, &hdr);
3041         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3042         encode_layoutget(xdr, args, &hdr);
3043
3044         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3045             args->layout.pages, 0, args->layout.pglen);
3046
3047         encode_nops(&hdr);
3048 }
3049
3050 /*
3051  *  Encode LAYOUTCOMMIT request
3052  */
3053 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3054                                       struct xdr_stream *xdr,
3055                                       const void *priv)
3056 {
3057         const struct nfs4_layoutcommit_args *args = priv;
3058         struct nfs4_layoutcommit_data *data =
3059                 container_of(args, struct nfs4_layoutcommit_data, args);
3060         struct compound_hdr hdr = {
3061                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3062         };
3063
3064         encode_compound_hdr(xdr, req, &hdr);
3065         encode_sequence(xdr, &args->seq_args, &hdr);
3066         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3067         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3068         encode_getfattr(xdr, args->bitmask, &hdr);
3069         encode_nops(&hdr);
3070 }
3071
3072 /*
3073  * Encode LAYOUTRETURN request
3074  */
3075 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3076                                       struct xdr_stream *xdr,
3077                                       const void *data)
3078 {
3079         const struct nfs4_layoutreturn_args *args = data;
3080         struct compound_hdr hdr = {
3081                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3082         };
3083
3084         encode_compound_hdr(xdr, req, &hdr);
3085         encode_sequence(xdr, &args->seq_args, &hdr);
3086         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3087         encode_layoutreturn(xdr, args, &hdr);
3088         encode_nops(&hdr);
3089 }
3090
3091 /*
3092  * Encode SECINFO_NO_NAME request
3093  */
3094 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3095                                         struct xdr_stream *xdr,
3096                                         const void *data)
3097 {
3098         const struct nfs41_secinfo_no_name_args *args = data;
3099         struct compound_hdr hdr = {
3100                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3101         };
3102
3103         encode_compound_hdr(xdr, req, &hdr);
3104         encode_sequence(xdr, &args->seq_args, &hdr);
3105         encode_putrootfh(xdr, &hdr);
3106         encode_secinfo_no_name(xdr, args, &hdr);
3107         encode_nops(&hdr);
3108 }
3109
3110 /*
3111  *  Encode TEST_STATEID request
3112  */
3113 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3114                                       struct xdr_stream *xdr,
3115                                       const void *data)
3116 {
3117         const struct nfs41_test_stateid_args *args = data;
3118         struct compound_hdr hdr = {
3119                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3120         };
3121
3122         encode_compound_hdr(xdr, req, &hdr);
3123         encode_sequence(xdr, &args->seq_args, &hdr);
3124         encode_test_stateid(xdr, args, &hdr);
3125         encode_nops(&hdr);
3126 }
3127
3128 /*
3129  *  Encode FREE_STATEID request
3130  */
3131 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3132                                      struct xdr_stream *xdr,
3133                                      const void *data)
3134 {
3135         const struct nfs41_free_stateid_args *args = data;
3136         struct compound_hdr hdr = {
3137                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3138         };
3139
3140         encode_compound_hdr(xdr, req, &hdr);
3141         encode_sequence(xdr, &args->seq_args, &hdr);
3142         encode_free_stateid(xdr, args, &hdr);
3143         encode_nops(&hdr);
3144 }
3145 #endif /* CONFIG_NFS_V4_1 */
3146
3147 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3148 {
3149         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3150                 "Remaining buffer length is %tu words.\n",
3151                 func, xdr->end - xdr->p);
3152 }
3153
3154 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3155 {
3156         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3157                         NFS4_OPAQUE_LIMIT);
3158         if (unlikely(ret < 0)) {
3159                 if (ret == -EBADMSG)
3160                         print_overflow_msg(__func__, xdr);
3161                 return -EIO;
3162         }
3163         *len = ret;
3164         return 0;
3165 }
3166
3167 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3168 {
3169         __be32 *p;
3170
3171         p = xdr_inline_decode(xdr, 8);
3172         if (unlikely(!p))
3173                 goto out_overflow;
3174         hdr->status = be32_to_cpup(p++);
3175         hdr->taglen = be32_to_cpup(p);
3176
3177         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3178         if (unlikely(!p))
3179                 goto out_overflow;
3180         hdr->tag = (char *)p;
3181         p += XDR_QUADLEN(hdr->taglen);
3182         hdr->nops = be32_to_cpup(p);
3183         if (unlikely(hdr->nops < 1))
3184                 return nfs4_stat_to_errno(hdr->status);
3185         return 0;
3186 out_overflow:
3187         print_overflow_msg(__func__, xdr);
3188         return -EIO;
3189 }
3190
3191 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3192                 int *nfs_retval)
3193 {
3194         __be32 *p;
3195         uint32_t opnum;
3196         int32_t nfserr;
3197
3198         p = xdr_inline_decode(xdr, 8);
3199         if (unlikely(!p))
3200                 goto out_overflow;
3201         opnum = be32_to_cpup(p++);
3202         if (unlikely(opnum != expected))
3203                 goto out_bad_operation;
3204         nfserr = be32_to_cpup(p);
3205         if (nfserr == NFS_OK)
3206                 *nfs_retval = 0;
3207         else
3208                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3209         return true;
3210 out_bad_operation:
3211         dprintk("nfs: Server returned operation"
3212                 " %d but we issued a request for %d\n",
3213                         opnum, expected);
3214         *nfs_retval = -EREMOTEIO;
3215         return false;
3216 out_overflow:
3217         print_overflow_msg(__func__, xdr);
3218         *nfs_retval = -EIO;
3219         return false;
3220 }
3221
3222 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3223 {
3224         int retval;
3225
3226         __decode_op_hdr(xdr, expected, &retval);
3227         return retval;
3228 }
3229
3230 /* Dummy routine */
3231 static int decode_ace(struct xdr_stream *xdr, void *ace)
3232 {
3233         __be32 *p;
3234         unsigned int strlen;
3235         char *str;
3236
3237         p = xdr_inline_decode(xdr, 12);
3238         if (likely(p))
3239                 return decode_opaque_inline(xdr, &strlen, &str);
3240         print_overflow_msg(__func__, xdr);
3241         return -EIO;
3242 }
3243
3244 static ssize_t
3245 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3246 {
3247         ssize_t ret;
3248
3249         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3250         if (likely(ret >= 0))
3251                 return ret;
3252         if (ret == -EMSGSIZE)
3253                 return sz;
3254         print_overflow_msg(__func__, xdr);
3255         return -EIO;
3256 }
3257
3258 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3259 {
3260         ssize_t ret;
3261         ret = decode_bitmap4(xdr, bitmap, 3);
3262         return ret < 0 ? ret : 0;
3263 }
3264
3265 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3266 {
3267         __be32 *p;
3268
3269         p = xdr_inline_decode(xdr, 4);
3270         if (unlikely(!p))
3271                 goto out_overflow;
3272         *attrlen = be32_to_cpup(p);
3273         *savep = xdr_stream_pos(xdr);
3274         return 0;
3275 out_overflow:
3276         print_overflow_msg(__func__, xdr);
3277         return -EIO;
3278 }
3279
3280 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3281 {
3282         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3283                 int ret;
3284                 ret = decode_attr_bitmap(xdr, bitmask);
3285                 if (unlikely(ret < 0))
3286                         return ret;
3287                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3288         } else
3289                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3290         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3291                 bitmask[0], bitmask[1], bitmask[2]);
3292         return 0;
3293 }
3294
3295 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3296 {
3297         __be32 *p;
3298         int ret = 0;
3299
3300         *type = 0;
3301         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3302                 return -EIO;
3303         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3304                 p = xdr_inline_decode(xdr, 4);
3305                 if (unlikely(!p))
3306                         goto out_overflow;
3307                 *type = be32_to_cpup(p);
3308                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3309                         dprintk("%s: bad type %d\n", __func__, *type);
3310                         return -EIO;
3311                 }
3312                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3313                 ret = NFS_ATTR_FATTR_TYPE;
3314         }
3315         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3316         return ret;
3317 out_overflow:
3318         print_overflow_msg(__func__, xdr);
3319         return -EIO;
3320 }
3321
3322 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3323                                       uint32_t *bitmap, uint32_t *type)
3324 {
3325         __be32 *p;
3326
3327         *type = 0;
3328         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3329                 return -EIO;
3330         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3331                 p = xdr_inline_decode(xdr, 4);
3332                 if (unlikely(!p))
3333                         goto out_overflow;
3334                 *type = be32_to_cpup(p);
3335                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3336         }
3337         dprintk("%s: expire type=0x%x\n", __func__, *type);
3338         return 0;
3339 out_overflow:
3340         print_overflow_msg(__func__, xdr);
3341         return -EIO;
3342 }
3343
3344 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3345 {
3346         __be32 *p;
3347         int ret = 0;
3348
3349         *change = 0;
3350         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3351                 return -EIO;
3352         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3353                 p = xdr_inline_decode(xdr, 8);
3354                 if (unlikely(!p))
3355                         goto out_overflow;
3356                 xdr_decode_hyper(p, change);
3357                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3358                 ret = NFS_ATTR_FATTR_CHANGE;
3359         }
3360         dprintk("%s: change attribute=%Lu\n", __func__,
3361                         (unsigned long long)*change);
3362         return ret;
3363 out_overflow:
3364         print_overflow_msg(__func__, xdr);
3365         return -EIO;
3366 }
3367
3368 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3369 {
3370         __be32 *p;
3371         int ret = 0;
3372
3373         *size = 0;
3374         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3375                 return -EIO;
3376         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3377                 p = xdr_inline_decode(xdr, 8);
3378                 if (unlikely(!p))
3379                         goto out_overflow;
3380                 xdr_decode_hyper(p, size);
3381                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3382                 ret = NFS_ATTR_FATTR_SIZE;
3383         }
3384         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3385         return ret;
3386 out_overflow:
3387         print_overflow_msg(__func__, xdr);
3388         return -EIO;
3389 }
3390
3391 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3392 {
3393         __be32 *p;
3394
3395         *res = 0;
3396         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3397                 return -EIO;
3398         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3399                 p = xdr_inline_decode(xdr, 4);
3400                 if (unlikely(!p))
3401                         goto out_overflow;
3402                 *res = be32_to_cpup(p);
3403                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3404         }
3405         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3406         return 0;
3407 out_overflow:
3408         print_overflow_msg(__func__, xdr);
3409         return -EIO;
3410 }
3411
3412 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3413 {
3414         __be32 *p;
3415
3416         *res = 0;
3417         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3418                 return -EIO;
3419         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3420                 p = xdr_inline_decode(xdr, 4);
3421                 if (unlikely(!p))
3422                         goto out_overflow;
3423                 *res = be32_to_cpup(p);
3424                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3425         }
3426         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3427         return 0;
3428 out_overflow:
3429         print_overflow_msg(__func__, xdr);
3430         return -EIO;
3431 }
3432
3433 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3434 {
3435         __be32 *p;
3436         int ret = 0;
3437
3438         fsid->major = 0;
3439         fsid->minor = 0;
3440         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3441                 return -EIO;
3442         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3443                 p = xdr_inline_decode(xdr, 16);
3444                 if (unlikely(!p))
3445                         goto out_overflow;
3446                 p = xdr_decode_hyper(p, &fsid->major);
3447                 xdr_decode_hyper(p, &fsid->minor);
3448                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3449                 ret = NFS_ATTR_FATTR_FSID;
3450         }
3451         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3452                         (unsigned long long)fsid->major,
3453                         (unsigned long long)fsid->minor);
3454         return ret;
3455 out_overflow:
3456         print_overflow_msg(__func__, xdr);
3457         return -EIO;
3458 }
3459
3460 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3461 {
3462         __be32 *p;
3463
3464         *res = 60;
3465         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3466                 return -EIO;
3467         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3468                 p = xdr_inline_decode(xdr, 4);
3469                 if (unlikely(!p))
3470                         goto out_overflow;
3471                 *res = be32_to_cpup(p);
3472                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3473         }
3474         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3475         return 0;
3476 out_overflow:
3477         print_overflow_msg(__func__, xdr);
3478         return -EIO;
3479 }
3480
3481 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3482 {
3483         __be32 *p;
3484
3485         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3486                 return -EIO;
3487         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3488                 p = xdr_inline_decode(xdr, 4);
3489                 if (unlikely(!p))
3490                         goto out_overflow;
3491                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3492                 *res = -be32_to_cpup(p);
3493         }
3494         return 0;
3495 out_overflow:
3496         print_overflow_msg(__func__, xdr);
3497         return -EIO;
3498 }
3499
3500 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3501                                  uint32_t *bitmap, uint32_t *bitmask)
3502 {
3503         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3504                 int ret;
3505                 ret = decode_attr_bitmap(xdr, bitmask);
3506                 if (unlikely(ret < 0))
3507                         return ret;
3508                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3509         } else
3510                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3511         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3512                 bitmask[0], bitmask[1], bitmask[2]);
3513         return 0;
3514 }
3515
3516 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3517 {
3518         __be32 *p;
3519         int len;
3520
3521         if (fh != NULL)
3522                 memset(fh, 0, sizeof(*fh));
3523
3524         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3525                 return -EIO;
3526         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3527                 p = xdr_inline_decode(xdr, 4);
3528                 if (unlikely(!p))
3529                         goto out_overflow;
3530                 len = be32_to_cpup(p);
3531                 if (len > NFS4_FHSIZE)
3532                         return -EIO;
3533                 p = xdr_inline_decode(xdr, len);
3534                 if (unlikely(!p))
3535                         goto out_overflow;
3536                 if (fh != NULL) {
3537                         memcpy(fh->data, p, len);
3538                         fh->size = len;
3539                 }
3540                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3541         }
3542         return 0;
3543 out_overflow:
3544         print_overflow_msg(__func__, xdr);
3545         return -EIO;
3546 }
3547
3548 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3549 {
3550         __be32 *p;
3551
3552         *res = 0;
3553         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3554                 return -EIO;
3555         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3556                 p = xdr_inline_decode(xdr, 4);
3557                 if (unlikely(!p))
3558                         goto out_overflow;
3559                 *res = be32_to_cpup(p);
3560                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3561         }
3562         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3563         return 0;
3564 out_overflow:
3565         print_overflow_msg(__func__, xdr);
3566         return -EIO;
3567 }
3568
3569 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3570 {
3571         __be32 *p;
3572         int ret = 0;
3573
3574         *fileid = 0;
3575         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3576                 return -EIO;
3577         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3578                 p = xdr_inline_decode(xdr, 8);
3579                 if (unlikely(!p))
3580                         goto out_overflow;
3581                 xdr_decode_hyper(p, fileid);
3582                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3583                 ret = NFS_ATTR_FATTR_FILEID;
3584         }
3585         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3586         return ret;
3587 out_overflow:
3588         print_overflow_msg(__func__, xdr);
3589         return -EIO;
3590 }
3591
3592 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3593 {
3594         __be32 *p;
3595         int ret = 0;
3596
3597         *fileid = 0;
3598         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3599                 return -EIO;
3600         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3601                 p = xdr_inline_decode(xdr, 8);
3602                 if (unlikely(!p))
3603                         goto out_overflow;
3604                 xdr_decode_hyper(p, fileid);
3605                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3606                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3607         }
3608         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3609         return ret;
3610 out_overflow:
3611         print_overflow_msg(__func__, xdr);
3612         return -EIO;
3613 }
3614
3615 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3616 {
3617         __be32 *p;
3618         int status = 0;
3619
3620         *res = 0;
3621         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3622                 return -EIO;
3623         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3624                 p = xdr_inline_decode(xdr, 8);
3625                 if (unlikely(!p))
3626                         goto out_overflow;
3627                 xdr_decode_hyper(p, res);
3628                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3629         }
3630         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3631         return status;
3632 out_overflow:
3633         print_overflow_msg(__func__, xdr);
3634         return -EIO;
3635 }
3636
3637 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3638 {
3639         __be32 *p;
3640         int status = 0;
3641
3642         *res = 0;
3643         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3644                 return -EIO;
3645         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3646                 p = xdr_inline_decode(xdr, 8);
3647                 if (unlikely(!p))
3648                         goto out_overflow;
3649                 xdr_decode_hyper(p, res);
3650                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3651         }
3652         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3653         return status;
3654 out_overflow:
3655         print_overflow_msg(__func__, xdr);
3656         return -EIO;
3657 }
3658
3659 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3660 {
3661         __be32 *p;
3662         int status = 0;
3663
3664         *res = 0;
3665         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3666                 return -EIO;
3667         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3668                 p = xdr_inline_decode(xdr, 8);
3669                 if (unlikely(!p))
3670                         goto out_overflow;
3671                 xdr_decode_hyper(p, res);
3672                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3673         }
3674         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3675         return status;
3676 out_overflow:
3677         print_overflow_msg(__func__, xdr);
3678         return -EIO;
3679 }
3680
3681 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3682 {
3683         u32 n;
3684         __be32 *p;
3685         int status = 0;
3686
3687         p = xdr_inline_decode(xdr, 4);
3688         if (unlikely(!p))
3689                 goto out_overflow;
3690         n = be32_to_cpup(p);
3691         if (n == 0)
3692                 goto root_path;
3693         dprintk("pathname4: ");
3694         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3695                 dprintk("cannot parse %d components in path\n", n);
3696                 goto out_eio;
3697         }
3698         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3699                 struct nfs4_string *component = &path->components[path->ncomponents];
3700                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3701                 if (unlikely(status != 0))
3702                         goto out_eio;
3703                 ifdebug (XDR)
3704                         pr_cont("%s%.*s ",
3705                                 (path->ncomponents != n ? "/ " : ""),
3706                                 component->len, component->data);
3707         }
3708 out:
3709         return status;
3710 root_path:
3711 /* a root pathname is sent as a zero component4 */
3712         path->ncomponents = 1;
3713         path->components[0].len=0;
3714         path->components[0].data=NULL;
3715         dprintk("pathname4: /\n");
3716         goto out;
3717 out_eio:
3718         dprintk(" status %d", status);
3719         status = -EIO;
3720         goto out;
3721 out_overflow:
3722         print_overflow_msg(__func__, xdr);
3723         return -EIO;
3724 }
3725
3726 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3727 {
3728         int n;
3729         __be32 *p;
3730         int status = -EIO;
3731
3732         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3733                 goto out;
3734         status = 0;
3735         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3736                 goto out;
3737         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3738         status = -EIO;
3739         /* Ignore borken servers that return unrequested attrs */
3740         if (unlikely(res == NULL))
3741                 goto out;
3742         dprintk("%s: fsroot:\n", __func__);
3743         status = decode_pathname(xdr, &res->fs_path);
3744         if (unlikely(status != 0))
3745                 goto out;
3746         p = xdr_inline_decode(xdr, 4);
3747         if (unlikely(!p))
3748                 goto out_overflow;
3749         n = be32_to_cpup(p);
3750         if (n <= 0)
3751                 goto out_eio;
3752         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3753                 u32 m;
3754                 struct nfs4_fs_location *loc;
3755
3756                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3757                         break;
3758                 loc = &res->locations[res->nlocations];
3759                 p = xdr_inline_decode(xdr, 4);
3760                 if (unlikely(!p))
3761                         goto out_overflow;
3762                 m = be32_to_cpup(p);
3763
3764                 dprintk("%s: servers:\n", __func__);
3765                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3766                         struct nfs4_string *server;
3767
3768                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3769                                 unsigned int i;
3770                                 dprintk("%s: using first %u of %u servers "
3771                                         "returned for location %u\n",
3772                                                 __func__,
3773                                                 NFS4_FS_LOCATION_MAXSERVERS,
3774                                                 m, res->nlocations);
3775                                 for (i = loc->nservers; i < m; i++) {
3776                                         unsigned int len;
3777                                         char *data;
3778                                         status = decode_opaque_inline(xdr, &len, &data);
3779                                         if (unlikely(status != 0))
3780                                                 goto out_eio;
3781                                 }
3782                                 break;
3783                         }
3784                         server = &loc->servers[loc->nservers];
3785                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3786                         if (unlikely(status != 0))
3787                                 goto out_eio;
3788                         dprintk("%s ", server->data);
3789                 }
3790                 status = decode_pathname(xdr, &loc->rootpath);
3791                 if (unlikely(status != 0))
3792                         goto out_eio;
3793         }
3794         if (res->nlocations != 0)
3795                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3796 out:
3797         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3798         return status;
3799 out_overflow:
3800         print_overflow_msg(__func__, xdr);
3801 out_eio:
3802         status = -EIO;
3803         goto out;
3804 }
3805
3806 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3807 {
3808         __be32 *p;
3809         int status = 0;
3810
3811         *res = 0;
3812         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3813                 return -EIO;
3814         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3815                 p = xdr_inline_decode(xdr, 8);
3816                 if (unlikely(!p))
3817                         goto out_overflow;
3818                 xdr_decode_hyper(p, res);
3819                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3820         }
3821         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3822         return status;
3823 out_overflow:
3824         print_overflow_msg(__func__, xdr);
3825         return -EIO;
3826 }
3827
3828 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3829 {
3830         __be32 *p;
3831         int status = 0;
3832
3833         *maxlink = 1;
3834         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3835                 return -EIO;
3836         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3837                 p = xdr_inline_decode(xdr, 4);
3838                 if (unlikely(!p))
3839                         goto out_overflow;
3840                 *maxlink = be32_to_cpup(p);
3841                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3842         }
3843         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3844         return status;
3845 out_overflow:
3846         print_overflow_msg(__func__, xdr);
3847         return -EIO;
3848 }
3849
3850 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3851 {
3852         __be32 *p;
3853         int status = 0;
3854
3855         *maxname = 1024;
3856         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3857                 return -EIO;
3858         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3859                 p = xdr_inline_decode(xdr, 4);
3860                 if (unlikely(!p))
3861                         goto out_overflow;
3862                 *maxname = be32_to_cpup(p);
3863                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3864         }
3865         dprintk("%s: maxname=%u\n", __func__, *maxname);
3866         return status;
3867 out_overflow:
3868         print_overflow_msg(__func__, xdr);
3869         return -EIO;
3870 }
3871
3872 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3873 {
3874         __be32 *p;
3875         int status = 0;
3876
3877         *res = 1024;
3878         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3879                 return -EIO;
3880         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3881                 uint64_t maxread;
3882                 p = xdr_inline_decode(xdr, 8);
3883                 if (unlikely(!p))
3884                         goto out_overflow;
3885                 xdr_decode_hyper(p, &maxread);
3886                 if (maxread > 0x7FFFFFFF)
3887                         maxread = 0x7FFFFFFF;
3888                 *res = (uint32_t)maxread;
3889                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3890         }
3891         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3892         return status;
3893 out_overflow:
3894         print_overflow_msg(__func__, xdr);
3895         return -EIO;
3896 }
3897
3898 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3899 {
3900         __be32 *p;
3901         int status = 0;
3902
3903         *res = 1024;
3904         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3905                 return -EIO;
3906         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3907                 uint64_t maxwrite;
3908                 p = xdr_inline_decode(xdr, 8);
3909                 if (unlikely(!p))
3910                         goto out_overflow;
3911                 xdr_decode_hyper(p, &maxwrite);
3912                 if (maxwrite > 0x7FFFFFFF)
3913                         maxwrite = 0x7FFFFFFF;
3914                 *res = (uint32_t)maxwrite;
3915                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3916         }
3917         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3918         return status;
3919 out_overflow:
3920         print_overflow_msg(__func__, xdr);
3921         return -EIO;
3922 }
3923
3924 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3925 {
3926         uint32_t tmp;
3927         __be32 *p;
3928         int ret = 0;
3929
3930         *mode = 0;
3931         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3932                 return -EIO;
3933         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3934                 p = xdr_inline_decode(xdr, 4);
3935                 if (unlikely(!p))
3936                         goto out_overflow;
3937                 tmp = be32_to_cpup(p);
3938                 *mode = tmp & ~S_IFMT;
3939                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3940                 ret = NFS_ATTR_FATTR_MODE;
3941         }
3942         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3943         return ret;
3944 out_overflow:
3945         print_overflow_msg(__func__, xdr);
3946         return -EIO;
3947 }
3948
3949 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3950 {
3951         __be32 *p;
3952         int ret = 0;
3953
3954         *nlink = 1;
3955         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3956                 return -EIO;
3957         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3958                 p = xdr_inline_decode(xdr, 4);
3959                 if (unlikely(!p))
3960                         goto out_overflow;
3961                 *nlink = be32_to_cpup(p);
3962                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3963                 ret = NFS_ATTR_FATTR_NLINK;
3964         }
3965         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3966         return ret;
3967 out_overflow:
3968         print_overflow_msg(__func__, xdr);
3969         return -EIO;
3970 }
3971
3972 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3973                 struct nfs4_string *name, gfp_t gfp_flags)
3974 {
3975         ssize_t ret;
3976
3977         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3978                         XDR_MAX_NETOBJ, gfp_flags);
3979         name->len = 0;
3980         if (ret > 0)
3981                 name->len = ret;
3982         return ret;
3983 }
3984
3985 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3986                 const struct nfs_server *server, kuid_t *uid,
3987                 struct nfs4_string *owner_name)
3988 {
3989         ssize_t len;
3990         char *p;
3991
3992         *uid = make_kuid(&init_user_ns, -2);
3993         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3994                 return -EIO;
3995         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3996                 return 0;
3997         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3998
3999         if (owner_name != NULL) {
4000                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
4001                 if (len <= 0)
4002                         goto out;
4003                 dprintk("%s: name=%s\n", __func__, owner_name->data);
4004                 return NFS_ATTR_FATTR_OWNER_NAME;
4005         } else {
4006                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4007                                 XDR_MAX_NETOBJ);
4008                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
4009                         goto out;
4010                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
4011                 return NFS_ATTR_FATTR_OWNER;
4012         }
4013 out:
4014         if (len != -EBADMSG)
4015                 return 0;
4016         print_overflow_msg(__func__, xdr);
4017         return -EIO;
4018 }
4019
4020 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4021                 const struct nfs_server *server, kgid_t *gid,
4022                 struct nfs4_string *group_name)
4023 {
4024         ssize_t len;
4025         char *p;
4026
4027         *gid = make_kgid(&init_user_ns, -2);
4028         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4029                 return -EIO;
4030         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4031                 return 0;
4032         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4033
4034         if (group_name != NULL) {
4035                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4036                 if (len <= 0)
4037                         goto out;
4038                 dprintk("%s: name=%s\n", __func__, group_name->data);
4039                 return NFS_ATTR_FATTR_GROUP_NAME;
4040         } else {
4041                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4042                                 XDR_MAX_NETOBJ);
4043                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4044                         goto out;
4045                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4046                 return NFS_ATTR_FATTR_GROUP;
4047         }
4048 out:
4049         if (len != -EBADMSG)
4050                 return 0;
4051         print_overflow_msg(__func__, xdr);
4052         return -EIO;
4053 }
4054
4055 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4056 {
4057         uint32_t major = 0, minor = 0;
4058         __be32 *p;
4059         int ret = 0;
4060
4061         *rdev = MKDEV(0,0);
4062         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4063                 return -EIO;
4064         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4065                 dev_t tmp;
4066
4067                 p = xdr_inline_decode(xdr, 8);
4068                 if (unlikely(!p))
4069                         goto out_overflow;
4070                 major = be32_to_cpup(p++);
4071                 minor = be32_to_cpup(p);
4072                 tmp = MKDEV(major, minor);
4073                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4074                         *rdev = tmp;
4075                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4076                 ret = NFS_ATTR_FATTR_RDEV;
4077         }
4078         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4079         return ret;
4080 out_overflow:
4081         print_overflow_msg(__func__, xdr);
4082         return -EIO;
4083 }
4084
4085 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4086 {
4087         __be32 *p;
4088         int status = 0;
4089
4090         *res = 0;
4091         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4092                 return -EIO;
4093         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4094                 p = xdr_inline_decode(xdr, 8);
4095                 if (unlikely(!p))
4096                         goto out_overflow;
4097                 xdr_decode_hyper(p, res);
4098                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4099         }
4100         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4101         return status;
4102 out_overflow:
4103         print_overflow_msg(__func__, xdr);
4104         return -EIO;
4105 }
4106
4107 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4108 {
4109         __be32 *p;
4110         int status = 0;
4111
4112         *res = 0;
4113         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4114                 return -EIO;
4115         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4116                 p = xdr_inline_decode(xdr, 8);
4117                 if (unlikely(!p))
4118                         goto out_overflow;
4119                 xdr_decode_hyper(p, res);
4120                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4121         }
4122         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4123         return status;
4124 out_overflow:
4125         print_overflow_msg(__func__, xdr);
4126         return -EIO;
4127 }
4128
4129 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4130 {
4131         __be32 *p;
4132         int status = 0;
4133
4134         *res = 0;
4135         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4136                 return -EIO;
4137         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4138                 p = xdr_inline_decode(xdr, 8);
4139                 if (unlikely(!p))
4140                         goto out_overflow;
4141                 xdr_decode_hyper(p, res);
4142                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4143         }
4144         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4145         return status;
4146 out_overflow:
4147         print_overflow_msg(__func__, xdr);
4148         return -EIO;
4149 }
4150
4151 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4152 {
4153         __be32 *p;
4154         int ret = 0;
4155
4156         *used = 0;
4157         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4158                 return -EIO;
4159         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4160                 p = xdr_inline_decode(xdr, 8);
4161                 if (unlikely(!p))
4162                         goto out_overflow;
4163                 xdr_decode_hyper(p, used);
4164                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4165                 ret = NFS_ATTR_FATTR_SPACE_USED;
4166         }
4167         dprintk("%s: space used=%Lu\n", __func__,
4168                         (unsigned long long)*used);
4169         return ret;
4170 out_overflow:
4171         print_overflow_msg(__func__, xdr);
4172         return -EIO;
4173 }
4174
4175 static __be32 *
4176 xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4177 {
4178         __u64 sec;
4179
4180         p = xdr_decode_hyper(p, &sec);
4181         t-> tv_sec = (time_t)sec;
4182         t->tv_nsec = be32_to_cpup(p++);
4183         return p;
4184 }
4185
4186 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4187 {
4188         __be32 *p;
4189
4190         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4191         if (unlikely(!p))
4192                 goto out_overflow;
4193         xdr_decode_nfstime4(p, time);
4194         return 0;
4195 out_overflow:
4196         print_overflow_msg(__func__, xdr);
4197         return -EIO;
4198 }
4199
4200 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4201 {
4202         int status = 0;
4203
4204         time->tv_sec = 0;
4205         time->tv_nsec = 0;
4206         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4207                 return -EIO;
4208         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4209                 status = decode_attr_time(xdr, time);
4210                 if (status == 0)
4211                         status = NFS_ATTR_FATTR_ATIME;
4212                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4213         }
4214         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4215         return status;
4216 }
4217
4218 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4219 {
4220         int status = 0;
4221
4222         time->tv_sec = 0;
4223         time->tv_nsec = 0;
4224         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4225                 return -EIO;
4226         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4227                 status = decode_attr_time(xdr, time);
4228                 if (status == 0)
4229                         status = NFS_ATTR_FATTR_CTIME;
4230                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4231         }
4232         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4233         return status;
4234 }
4235
4236 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4237                                   struct timespec *time)
4238 {
4239         int status = 0;
4240
4241         time->tv_sec = 0;
4242         time->tv_nsec = 0;
4243         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4244                 return -EIO;
4245         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4246                 status = decode_attr_time(xdr, time);
4247                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4248         }
4249         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4250                 (long)time->tv_nsec);
4251         return status;
4252 }
4253
4254 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4255                                         struct nfs4_label *label)
4256 {
4257         uint32_t pi = 0;
4258         uint32_t lfs = 0;
4259         __u32 len;
4260         __be32 *p;
4261         int status = 0;
4262
4263         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4264                 return -EIO;
4265         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4266                 p = xdr_inline_decode(xdr, 4);
4267                 if (unlikely(!p))
4268                         goto out_overflow;
4269                 lfs = be32_to_cpup(p++);
4270                 p = xdr_inline_decode(xdr, 4);
4271                 if (unlikely(!p))
4272                         goto out_overflow;
4273                 pi = be32_to_cpup(p++);
4274                 p = xdr_inline_decode(xdr, 4);
4275                 if (unlikely(!p))
4276                         goto out_overflow;
4277                 len = be32_to_cpup(p++);
4278                 p = xdr_inline_decode(xdr, len);
4279                 if (unlikely(!p))
4280                         goto out_overflow;
4281                 if (len < NFS4_MAXLABELLEN) {
4282                         if (label) {
4283                                 if (label->len) {
4284                                         if (label->len < len)
4285                                                 return -ERANGE;
4286                                         memcpy(label->label, p, len);
4287                                 }
4288                                 label->len = len;
4289                                 label->pi = pi;
4290                                 label->lfs = lfs;
4291                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4292                         }
4293                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4294                 } else
4295                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4296                                         __func__, len);
4297         }
4298         if (label && label->label)
4299                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4300                         (char *)label->label, label->len, label->pi, label->lfs);
4301         return status;
4302
4303 out_overflow:
4304         print_overflow_msg(__func__, xdr);
4305         return -EIO;
4306 }
4307
4308 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4309 {
4310         int status = 0;
4311
4312         time->tv_sec = 0;
4313         time->tv_nsec = 0;
4314         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4315                 return -EIO;
4316         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4317                 status = decode_attr_time(xdr, time);
4318                 if (status == 0)
4319                         status = NFS_ATTR_FATTR_MTIME;
4320                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4321         }
4322         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4323         return status;
4324 }
4325
4326 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4327 {
4328         unsigned int attrwords = XDR_QUADLEN(attrlen);
4329         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4330
4331         if (unlikely(attrwords != nwords)) {
4332                 dprintk("%s: server returned incorrect attribute length: "
4333                         "%u %c %u\n",
4334                                 __func__,
4335                                 attrwords << 2,
4336                                 (attrwords < nwords) ? '<' : '>',
4337                                 nwords << 2);
4338                 return -EIO;
4339         }
4340         return 0;
4341 }
4342
4343 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4344 {
4345         __be32 *p;
4346
4347         p = xdr_inline_decode(xdr, 20);
4348         if (unlikely(!p))
4349                 goto out_overflow;
4350         cinfo->atomic = be32_to_cpup(p++);
4351         p = xdr_decode_hyper(p, &cinfo->before);
4352         xdr_decode_hyper(p, &cinfo->after);
4353         return 0;
4354 out_overflow:
4355         print_overflow_msg(__func__, xdr);
4356         return -EIO;
4357 }
4358
4359 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4360 {
4361         __be32 *p;
4362         uint32_t supp, acc;
4363         int status;
4364
4365         status = decode_op_hdr(xdr, OP_ACCESS);
4366         if (status)
4367                 return status;
4368         p = xdr_inline_decode(xdr, 8);
4369         if (unlikely(!p))
4370                 goto out_overflow;
4371         supp = be32_to_cpup(p++);
4372         acc = be32_to_cpup(p);
4373         *supported = supp;
4374         *access = acc;
4375         return 0;
4376 out_overflow:
4377         print_overflow_msg(__func__, xdr);
4378         return -EIO;
4379 }
4380
4381 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4382 {
4383         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4384         if (unlikely(ret < 0)) {
4385                 print_overflow_msg(__func__, xdr);
4386                 return -EIO;
4387         }
4388         return 0;
4389 }
4390
4391 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4392 {
4393         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4394 }
4395
4396 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4397 {
4398         stateid->type = NFS4_OPEN_STATEID_TYPE;
4399         return decode_stateid(xdr, stateid);
4400 }
4401
4402 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4403 {
4404         stateid->type = NFS4_LOCK_STATEID_TYPE;
4405         return decode_stateid(xdr, stateid);
4406 }
4407
4408 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4409 {
4410         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4411         return decode_stateid(xdr, stateid);
4412 }
4413
4414 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4415 {
4416         nfs4_stateid dummy;
4417
4418         nfs4_stateid_copy(stateid, &invalid_stateid);
4419         return decode_stateid(xdr, &dummy);
4420 }
4421
4422 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4423 {
4424         int status;
4425
4426         status = decode_op_hdr(xdr, OP_CLOSE);
4427         if (status != -EIO)
4428                 nfs_increment_open_seqid(status, res->seqid);
4429         if (!status)
4430                 status = decode_invalid_stateid(xdr, &res->stateid);
4431         return status;
4432 }
4433
4434 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4435 {
4436         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4437 }
4438
4439 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4440 {
4441         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4442 }
4443
4444 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4445 {
4446         struct nfs_writeverf *verf = res->verf;
4447         int status;
4448
4449         status = decode_op_hdr(xdr, OP_COMMIT);
4450         if (!status)
4451                 status = decode_write_verifier(xdr, &verf->verifier);
4452         if (!status)
4453                 verf->committed = NFS_FILE_SYNC;
4454         return status;
4455 }
4456
4457 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4458 {
4459         __be32 *p;
4460         uint32_t bmlen;
4461         int status;
4462
4463         status = decode_op_hdr(xdr, OP_CREATE);
4464         if (status)
4465                 return status;
4466         if ((status = decode_change_info(xdr, cinfo)))
4467                 return status;
4468         p = xdr_inline_decode(xdr, 4);
4469         if (unlikely(!p))
4470                 goto out_overflow;
4471         bmlen = be32_to_cpup(p);
4472         p = xdr_inline_decode(xdr, bmlen << 2);
4473         if (likely(p))
4474                 return 0;
4475 out_overflow:
4476         print_overflow_msg(__func__, xdr);
4477         return -EIO;
4478 }
4479
4480 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4481 {
4482         unsigned int savep;
4483         uint32_t attrlen, bitmap[3] = {0};
4484         int status;
4485
4486         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4487                 goto xdr_error;
4488         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4489                 goto xdr_error;
4490         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4491                 goto xdr_error;
4492         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4493                 goto xdr_error;
4494         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4495                                                  &res->fh_expire_type)) != 0)
4496                 goto xdr_error;
4497         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4498                 goto xdr_error;
4499         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4500                 goto xdr_error;
4501         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4502                 goto xdr_error;
4503         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4504                                 res->exclcreat_bitmask)) != 0)
4505                 goto xdr_error;
4506         status = verify_attr_len(xdr, savep, attrlen);
4507 xdr_error:
4508         dprintk("%s: xdr returned %d!\n", __func__, -status);
4509         return status;
4510 }
4511
4512 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4513 {
4514         unsigned int savep;
4515         uint32_t attrlen, bitmap[3] = {0};
4516         int status;
4517
4518         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4519                 goto xdr_error;
4520         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4521                 goto xdr_error;
4522         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4523                 goto xdr_error;
4524
4525         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4526                 goto xdr_error;
4527         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4528                 goto xdr_error;
4529         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4530                 goto xdr_error;
4531
4532         status = -EIO;
4533         if (unlikely(bitmap[0]))
4534                 goto xdr_error;
4535
4536         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4537                 goto xdr_error;
4538         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4539                 goto xdr_error;
4540         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4541                 goto xdr_error;
4542
4543         status = verify_attr_len(xdr, savep, attrlen);
4544 xdr_error:
4545         dprintk("%s: xdr returned %d!\n", __func__, -status);
4546         return status;
4547 }
4548
4549 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4550 {
4551         unsigned int savep;
4552         uint32_t attrlen, bitmap[3] = {0};
4553         int status;
4554
4555         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4556                 goto xdr_error;
4557         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4558                 goto xdr_error;
4559         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4560                 goto xdr_error;
4561
4562         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4563                 goto xdr_error;
4564         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4565                 goto xdr_error;
4566
4567         status = verify_attr_len(xdr, savep, attrlen);
4568 xdr_error:
4569         dprintk("%s: xdr returned %d!\n", __func__, -status);
4570         return status;
4571 }
4572
4573 static int decode_threshold_hint(struct xdr_stream *xdr,
4574                                   uint32_t *bitmap,
4575                                   uint64_t *res,
4576                                   uint32_t hint_bit)
4577 {
4578         __be32 *p;
4579
4580         *res = 0;
4581         if (likely(bitmap[0] & hint_bit)) {
4582                 p = xdr_inline_decode(xdr, 8);
4583                 if (unlikely(!p))
4584                         goto out_overflow;
4585                 xdr_decode_hyper(p, res);
4586         }
4587         return 0;
4588 out_overflow:
4589         print_overflow_msg(__func__, xdr);
4590         return -EIO;
4591 }
4592
4593 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4594                                         struct nfs4_threshold *res)
4595 {
4596         __be32 *p;
4597         unsigned int savep;
4598         uint32_t bitmap[3] = {0,}, attrlen;
4599         int status;
4600
4601         /* layout type */
4602         p = xdr_inline_decode(xdr, 4);
4603         if (unlikely(!p)) {
4604                 print_overflow_msg(__func__, xdr);
4605                 return -EIO;
4606         }
4607         res->l_type = be32_to_cpup(p);
4608
4609         /* thi_hintset bitmap */
4610         status = decode_attr_bitmap(xdr, bitmap);
4611         if (status < 0)
4612                 goto xdr_error;
4613
4614         /* thi_hintlist length */
4615         status = decode_attr_length(xdr, &attrlen, &savep);
4616         if (status < 0)
4617                 goto xdr_error;
4618         /* thi_hintlist */
4619         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4620         if (status < 0)
4621                 goto xdr_error;
4622         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4623         if (status < 0)
4624                 goto xdr_error;
4625         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4626                                        THRESHOLD_RD_IO);
4627         if (status < 0)
4628                 goto xdr_error;
4629         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4630                                        THRESHOLD_WR_IO);
4631         if (status < 0)
4632                 goto xdr_error;
4633
4634         status = verify_attr_len(xdr, savep, attrlen);
4635         res->bm = bitmap[0];
4636
4637         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4638                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4639                 res->wr_io_sz);
4640 xdr_error:
4641         dprintk("%s ret=%d!\n", __func__, status);
4642         return status;
4643 }
4644
4645 /*
4646  * Thresholds on pNFS direct I/O vrs MDS I/O
4647  */
4648 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4649                                     uint32_t *bitmap,
4650                                     struct nfs4_threshold *res)
4651 {
4652         __be32 *p;
4653         int status = 0;
4654         uint32_t num;
4655
4656         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4657                 return -EIO;
4658         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4659                 /* Did the server return an unrequested attribute? */
4660                 if (unlikely(res == NULL))
4661                         return -EREMOTEIO;
4662                 p = xdr_inline_decode(xdr, 4);
4663                 if (unlikely(!p))
4664                         goto out_overflow;
4665                 num = be32_to_cpup(p);
4666                 if (num == 0)
4667                         return 0;
4668                 if (num > 1)
4669                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4670                                 "drivers per filesystem not supported\n",
4671                                 __func__);
4672
4673                 status = decode_first_threshold_item4(xdr, res);
4674                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4675         }
4676         return status;
4677 out_overflow:
4678         print_overflow_msg(__func__, xdr);
4679         return -EIO;
4680 }
4681
4682 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4683                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4684                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4685                 const struct nfs_server *server)
4686 {
4687         int status;
4688         umode_t fmode = 0;
4689         uint32_t type;
4690         int32_t err;
4691
4692         status = decode_attr_type(xdr, bitmap, &type);
4693         if (status < 0)
4694                 goto xdr_error;
4695         fattr->mode = 0;
4696         if (status != 0) {
4697                 fattr->mode |= nfs_type2fmt[type];
4698                 fattr->valid |= status;
4699         }
4700
4701         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4702         if (status < 0)
4703                 goto xdr_error;
4704         fattr->valid |= status;
4705
4706         status = decode_attr_size(xdr, bitmap, &fattr->size);
4707         if (status < 0)
4708                 goto xdr_error;
4709         fattr->valid |= status;
4710
4711         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4712         if (status < 0)
4713                 goto xdr_error;
4714         fattr->valid |= status;
4715
4716         err = 0;
4717         status = decode_attr_error(xdr, bitmap, &err);
4718         if (status < 0)
4719                 goto xdr_error;
4720
4721         status = decode_attr_filehandle(xdr, bitmap, fh);
4722         if (status < 0)
4723                 goto xdr_error;
4724
4725         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4726         if (status < 0)
4727                 goto xdr_error;
4728         fattr->valid |= status;
4729
4730         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4731         if (status < 0)
4732                 goto xdr_error;
4733         fattr->valid |= status;
4734
4735         status = -EIO;
4736         if (unlikely(bitmap[0]))
4737                 goto xdr_error;
4738
4739         status = decode_attr_mode(xdr, bitmap, &fmode);
4740         if (status < 0)
4741                 goto xdr_error;
4742         if (status != 0) {
4743                 fattr->mode |= fmode;
4744                 fattr->valid |= status;
4745         }
4746
4747         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4748         if (status < 0)
4749                 goto xdr_error;
4750         fattr->valid |= status;
4751
4752         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4753         if (status < 0)
4754                 goto xdr_error;
4755         fattr->valid |= status;
4756
4757         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4758         if (status < 0)
4759                 goto xdr_error;
4760         fattr->valid |= status;
4761
4762         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4763         if (status < 0)
4764                 goto xdr_error;
4765         fattr->valid |= status;
4766
4767         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4768         if (status < 0)
4769                 goto xdr_error;
4770         fattr->valid |= status;
4771
4772         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4773         if (status < 0)
4774                 goto xdr_error;
4775         fattr->valid |= status;
4776
4777         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4778         if (status < 0)
4779                 goto xdr_error;
4780         fattr->valid |= status;
4781
4782         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4783         if (status < 0)
4784                 goto xdr_error;
4785         fattr->valid |= status;
4786
4787         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4788         if (status < 0)
4789                 goto xdr_error;
4790         fattr->valid |= status;
4791
4792         status = -EIO;
4793         if (unlikely(bitmap[1]))
4794                 goto xdr_error;
4795
4796         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4797         if (status < 0)
4798                 goto xdr_error;
4799
4800         if (label) {
4801                 status = decode_attr_security_label(xdr, bitmap, label);
4802                 if (status < 0)
4803                         goto xdr_error;
4804                 fattr->valid |= status;
4805         }
4806
4807 xdr_error:
4808         dprintk("%s: xdr returned %d\n", __func__, -status);
4809         return status;
4810 }
4811
4812 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4813                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4814                 struct nfs4_label *label, const struct nfs_server *server)
4815 {
4816         unsigned int savep;
4817         uint32_t attrlen,
4818                  bitmap[3] = {0};
4819         int status;
4820
4821         status = decode_op_hdr(xdr, OP_GETATTR);
4822         if (status < 0)
4823                 goto xdr_error;
4824
4825         status = decode_attr_bitmap(xdr, bitmap);
4826         if (status < 0)
4827                 goto xdr_error;
4828
4829         status = decode_attr_length(xdr, &attrlen, &savep);
4830         if (status < 0)
4831                 goto xdr_error;
4832
4833         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4834                                         label, server);
4835         if (status < 0)
4836                 goto xdr_error;
4837
4838         status = verify_attr_len(xdr, savep, attrlen);
4839 xdr_error:
4840         dprintk("%s: xdr returned %d\n", __func__, -status);
4841         return status;
4842 }
4843
4844 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4845                 struct nfs4_label *label, const struct nfs_server *server)
4846 {
4847         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4848 }
4849
4850 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4851                 const struct nfs_server *server)
4852 {
4853         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4854 }
4855
4856 /*
4857  * Decode potentially multiple layout types.
4858  */
4859 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4860                                     struct nfs_fsinfo *fsinfo)
4861 {
4862         __be32 *p;
4863         uint32_t i;
4864
4865         p = xdr_inline_decode(xdr, 4);
4866         if (unlikely(!p))
4867                 goto out_overflow;
4868         fsinfo->nlayouttypes = be32_to_cpup(p);
4869
4870         /* pNFS is not supported by the underlying file system */
4871         if (fsinfo->nlayouttypes == 0)
4872                 return 0;
4873
4874         /* Decode and set first layout type, move xdr->p past unused types */
4875         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4876         if (unlikely(!p))
4877                 goto out_overflow;
4878
4879         /* If we get too many, then just cap it at the max */
4880         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4881                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4882                         __func__, fsinfo->nlayouttypes);
4883                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4884         }
4885
4886         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4887                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4888         return 0;
4889 out_overflow:
4890         print_overflow_msg(__func__, xdr);
4891         return -EIO;
4892 }
4893
4894 /*
4895  * The type of file system exported.
4896  * Note we must ensure that layouttype is set in any non-error case.
4897  */
4898 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4899                                 struct nfs_fsinfo *fsinfo)
4900 {
4901         int status = 0;
4902
4903         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4904         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4905                 return -EIO;
4906         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4907                 status = decode_pnfs_layout_types(xdr, fsinfo);
4908                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4909         }
4910         return status;
4911 }
4912
4913 /*
4914  * The prefered block size for layout directed io
4915  */
4916 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4917                                       uint32_t *res)
4918 {
4919         __be32 *p;
4920
4921         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4922         *res = 0;
4923         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4924                 p = xdr_inline_decode(xdr, 4);
4925                 if (unlikely(!p)) {
4926                         print_overflow_msg(__func__, xdr);
4927                         return -EIO;
4928                 }
4929                 *res = be32_to_cpup(p);
4930                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4931         }
4932         return 0;
4933 }
4934
4935 /*
4936  * The granularity of a CLONE operation.
4937  */
4938 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4939                                      uint32_t *res)
4940 {
4941         __be32 *p;
4942
4943         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4944         *res = 0;
4945         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4946                 p = xdr_inline_decode(xdr, 4);
4947                 if (unlikely(!p)) {
4948                         print_overflow_msg(__func__, xdr);
4949                         return -EIO;
4950                 }
4951                 *res = be32_to_cpup(p);
4952                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4953         }
4954         return 0;
4955 }
4956
4957 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4958 {
4959         unsigned int savep;
4960         uint32_t attrlen, bitmap[3];
4961         int status;
4962
4963         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4964                 goto xdr_error;
4965         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4966                 goto xdr_error;
4967         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4968                 goto xdr_error;
4969
4970         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4971
4972         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4973                 goto xdr_error;
4974         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4975                 goto xdr_error;
4976         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4977                 goto xdr_error;
4978         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4979         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4980                 goto xdr_error;
4981         fsinfo->wtpref = fsinfo->wtmax;
4982
4983         status = -EIO;
4984         if (unlikely(bitmap[0]))
4985                 goto xdr_error;
4986
4987         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4988         if (status != 0)
4989                 goto xdr_error;
4990         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4991         if (status != 0)
4992                 goto xdr_error;
4993
4994         status = -EIO;
4995         if (unlikely(bitmap[1]))
4996                 goto xdr_error;
4997
4998         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4999         if (status)
5000                 goto xdr_error;
5001         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
5002         if (status)
5003                 goto xdr_error;
5004
5005         status = verify_attr_len(xdr, savep, attrlen);
5006 xdr_error:
5007         dprintk("%s: xdr returned %d!\n", __func__, -status);
5008         return status;
5009 }
5010
5011 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
5012 {
5013         __be32 *p;
5014         uint32_t len;
5015         int status;
5016
5017         /* Zero handle first to allow comparisons */
5018         memset(fh, 0, sizeof(*fh));
5019
5020         status = decode_op_hdr(xdr, OP_GETFH);
5021         if (status)
5022                 return status;
5023
5024         p = xdr_inline_decode(xdr, 4);
5025         if (unlikely(!p))
5026                 goto out_overflow;
5027         len = be32_to_cpup(p);
5028         if (len > NFS4_FHSIZE)
5029                 return -EIO;
5030         fh->size = len;
5031         p = xdr_inline_decode(xdr, len);
5032         if (unlikely(!p))
5033                 goto out_overflow;
5034         memcpy(fh->data, p, len);
5035         return 0;
5036 out_overflow:
5037         print_overflow_msg(__func__, xdr);
5038         return -EIO;
5039 }
5040
5041 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5042 {
5043         int status;
5044
5045         status = decode_op_hdr(xdr, OP_LINK);
5046         if (status)
5047                 return status;
5048         return decode_change_info(xdr, cinfo);
5049 }
5050
5051 /*
5052  * We create the owner, so we know a proper owner.id length is 4.
5053  */
5054 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5055 {
5056         uint64_t offset, length, clientid;
5057         __be32 *p;
5058         uint32_t namelen, type;
5059
5060         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5061         if (unlikely(!p))
5062                 goto out_overflow;
5063         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5064         p = xdr_decode_hyper(p, &length);
5065         type = be32_to_cpup(p++); /* 4 byte read */
5066         if (fl != NULL) { /* manipulate file lock */
5067                 fl->fl_start = (loff_t)offset;
5068                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5069                 if (length == ~(uint64_t)0)
5070                         fl->fl_end = OFFSET_MAX;
5071                 fl->fl_type = F_WRLCK;
5072                 if (type & 1)
5073                         fl->fl_type = F_RDLCK;
5074                 fl->fl_pid = 0;
5075         }
5076         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5077         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5078         p = xdr_inline_decode(xdr, namelen); /* variable size field */
5079         if (likely(p))
5080                 return -NFS4ERR_DENIED;
5081 out_overflow:
5082         print_overflow_msg(__func__, xdr);
5083         return -EIO;
5084 }
5085
5086 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5087 {
5088         int status;
5089
5090         status = decode_op_hdr(xdr, OP_LOCK);
5091         if (status == -EIO)
5092                 goto out;
5093         if (status == 0) {
5094                 status = decode_lock_stateid(xdr, &res->stateid);
5095                 if (unlikely(status))
5096                         goto out;
5097         } else if (status == -NFS4ERR_DENIED)
5098                 status = decode_lock_denied(xdr, NULL);
5099         if (res->open_seqid != NULL)
5100                 nfs_increment_open_seqid(status, res->open_seqid);
5101         nfs_increment_lock_seqid(status, res->lock_seqid);
5102 out:
5103         return status;
5104 }
5105
5106 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5107 {
5108         int status;
5109         status = decode_op_hdr(xdr, OP_LOCKT);
5110         if (status == -NFS4ERR_DENIED)
5111                 return decode_lock_denied(xdr, res->denied);
5112         return status;
5113 }
5114
5115 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5116 {
5117         int status;
5118
5119         status = decode_op_hdr(xdr, OP_LOCKU);
5120         if (status != -EIO)
5121                 nfs_increment_lock_seqid(status, res->seqid);
5122         if (status == 0)
5123                 status = decode_lock_stateid(xdr, &res->stateid);
5124         return status;
5125 }
5126
5127 static int decode_release_lockowner(struct xdr_stream *xdr)
5128 {
5129         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5130 }
5131
5132 static int decode_lookup(struct xdr_stream *xdr)
5133 {
5134         return decode_op_hdr(xdr, OP_LOOKUP);
5135 }
5136
5137 static int decode_lookupp(struct xdr_stream *xdr)
5138 {
5139         return decode_op_hdr(xdr, OP_LOOKUPP);
5140 }
5141
5142 /* This is too sick! */
5143 static int decode_space_limit(struct xdr_stream *xdr,
5144                 unsigned long *pagemod_limit)
5145 {
5146         __be32 *p;
5147         uint32_t limit_type, nblocks, blocksize;
5148         u64 maxsize = 0;
5149
5150         p = xdr_inline_decode(xdr, 12);
5151         if (unlikely(!p))
5152                 goto out_overflow;
5153         limit_type = be32_to_cpup(p++);
5154         switch (limit_type) {
5155         case NFS4_LIMIT_SIZE:
5156                 xdr_decode_hyper(p, &maxsize);
5157                 break;
5158         case NFS4_LIMIT_BLOCKS:
5159                 nblocks = be32_to_cpup(p++);
5160                 blocksize = be32_to_cpup(p);
5161                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5162         }
5163         maxsize >>= PAGE_SHIFT;
5164         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5165         return 0;
5166 out_overflow:
5167         print_overflow_msg(__func__, xdr);
5168         return -EIO;
5169 }
5170
5171 static int decode_rw_delegation(struct xdr_stream *xdr,
5172                 uint32_t delegation_type,
5173                 struct nfs_openres *res)
5174 {
5175         __be32 *p;
5176         int status;
5177
5178         status = decode_delegation_stateid(xdr, &res->delegation);
5179         if (unlikely(status))
5180                 return status;
5181         p = xdr_inline_decode(xdr, 4);
5182         if (unlikely(!p))
5183                 goto out_overflow;
5184         res->do_recall = be32_to_cpup(p);
5185
5186         switch (delegation_type) {
5187         case NFS4_OPEN_DELEGATE_READ:
5188                 res->delegation_type = FMODE_READ;
5189                 break;
5190         case NFS4_OPEN_DELEGATE_WRITE:
5191                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5192                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5193                                 return -EIO;
5194         }
5195         return decode_ace(xdr, NULL);
5196 out_overflow:
5197         print_overflow_msg(__func__, xdr);
5198         return -EIO;
5199 }
5200
5201 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5202 {
5203         __be32 *p;
5204         uint32_t why_no_delegation;
5205
5206         p = xdr_inline_decode(xdr, 4);
5207         if (unlikely(!p))
5208                 goto out_overflow;
5209         why_no_delegation = be32_to_cpup(p);
5210         switch (why_no_delegation) {
5211                 case WND4_CONTENTION:
5212                 case WND4_RESOURCE:
5213                         xdr_inline_decode(xdr, 4);
5214                         /* Ignore for now */
5215         }
5216         return 0;
5217 out_overflow:
5218         print_overflow_msg(__func__, xdr);
5219         return -EIO;
5220 }
5221
5222 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5223 {
5224         __be32 *p;
5225         uint32_t delegation_type;
5226
5227         p = xdr_inline_decode(xdr, 4);
5228         if (unlikely(!p))
5229                 goto out_overflow;
5230         delegation_type = be32_to_cpup(p);
5231         res->delegation_type = 0;
5232         switch (delegation_type) {
5233         case NFS4_OPEN_DELEGATE_NONE:
5234                 return 0;
5235         case NFS4_OPEN_DELEGATE_READ:
5236         case NFS4_OPEN_DELEGATE_WRITE:
5237                 return decode_rw_delegation(xdr, delegation_type, res);
5238         case NFS4_OPEN_DELEGATE_NONE_EXT:
5239                 return decode_no_delegation(xdr, res);
5240         }
5241         return -EIO;
5242 out_overflow:
5243         print_overflow_msg(__func__, xdr);
5244         return -EIO;
5245 }
5246
5247 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5248 {
5249         __be32 *p;
5250         uint32_t savewords, bmlen, i;
5251         int status;
5252
5253         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5254                 return status;
5255         nfs_increment_open_seqid(status, res->seqid);
5256         if (status)
5257                 return status;
5258         status = decode_open_stateid(xdr, &res->stateid);
5259         if (unlikely(status))
5260                 return status;
5261
5262         decode_change_info(xdr, &res->cinfo);
5263
5264         p = xdr_inline_decode(xdr, 8);
5265         if (unlikely(!p))
5266                 goto out_overflow;
5267         res->rflags = be32_to_cpup(p++);
5268         bmlen = be32_to_cpup(p);
5269         if (bmlen > 10)
5270                 goto xdr_error;
5271
5272         p = xdr_inline_decode(xdr, bmlen << 2);
5273         if (unlikely(!p))
5274                 goto out_overflow;
5275         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5276         for (i = 0; i < savewords; ++i)
5277                 res->attrset[i] = be32_to_cpup(p++);
5278         for (; i < NFS4_BITMAP_SIZE; i++)
5279                 res->attrset[i] = 0;
5280
5281         return decode_delegation(xdr, res);
5282 xdr_error:
5283         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5284         return -EIO;
5285 out_overflow:
5286         print_overflow_msg(__func__, xdr);
5287         return -EIO;
5288 }
5289
5290 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5291 {
5292         int status;
5293
5294         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5295         if (status != -EIO)
5296                 nfs_increment_open_seqid(status, res->seqid);
5297         if (!status)
5298                 status = decode_open_stateid(xdr, &res->stateid);
5299         return status;
5300 }
5301
5302 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5303 {
5304         int status;
5305
5306         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5307         if (status != -EIO)
5308                 nfs_increment_open_seqid(status, res->seqid);
5309         if (!status)
5310                 status = decode_open_stateid(xdr, &res->stateid);
5311         return status;
5312 }
5313
5314 static int decode_putfh(struct xdr_stream *xdr)
5315 {
5316         return decode_op_hdr(xdr, OP_PUTFH);
5317 }
5318
5319 static int decode_putrootfh(struct xdr_stream *xdr)
5320 {
5321         return decode_op_hdr(xdr, OP_PUTROOTFH);
5322 }
5323
5324 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5325                        struct nfs_pgio_res *res)
5326 {
5327         __be32 *p;
5328         uint32_t count, eof, recvd;
5329         int status;
5330
5331         status = decode_op_hdr(xdr, OP_READ);
5332         if (status)
5333                 return status;
5334         p = xdr_inline_decode(xdr, 8);
5335         if (unlikely(!p))
5336                 goto out_overflow;
5337         eof = be32_to_cpup(p++);
5338         count = be32_to_cpup(p);
5339         recvd = xdr_read_pages(xdr, count);
5340         if (count > recvd) {
5341                 dprintk("NFS: server cheating in read reply: "
5342                                 "count %u > recvd %u\n", count, recvd);
5343                 count = recvd;
5344                 eof = 0;
5345         }
5346         res->eof = eof;
5347         res->count = count;
5348         return 0;
5349 out_overflow:
5350         print_overflow_msg(__func__, xdr);
5351         return -EIO;
5352 }
5353
5354 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5355 {
5356         int             status;
5357         __be32          verf[2];
5358
5359         status = decode_op_hdr(xdr, OP_READDIR);
5360         if (!status)
5361                 status = decode_verifier(xdr, readdir->verifier.data);
5362         if (unlikely(status))
5363                 return status;
5364         memcpy(verf, readdir->verifier.data, sizeof(verf));
5365         dprintk("%s: verifier = %08x:%08x\n",
5366                         __func__, verf[0], verf[1]);
5367         return xdr_read_pages(xdr, xdr->buf->page_len);
5368 }
5369
5370 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5371 {
5372         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5373         u32 len, recvd;
5374         __be32 *p;
5375         int status;
5376
5377         status = decode_op_hdr(xdr, OP_READLINK);
5378         if (status)
5379                 return status;
5380
5381         /* Convert length of symlink */
5382         p = xdr_inline_decode(xdr, 4);
5383         if (unlikely(!p))
5384                 goto out_overflow;
5385         len = be32_to_cpup(p);
5386         if (len >= rcvbuf->page_len || len <= 0) {
5387                 dprintk("nfs: server returned giant symlink!\n");
5388                 return -ENAMETOOLONG;
5389         }
5390         recvd = xdr_read_pages(xdr, len);
5391         if (recvd < len) {
5392                 dprintk("NFS: server cheating in readlink reply: "
5393                                 "count %u > recvd %u\n", len, recvd);
5394                 return -EIO;
5395         }
5396         /*
5397          * The XDR encode routine has set things up so that
5398          * the link text will be copied directly into the
5399          * buffer.  We just have to do overflow-checking,
5400          * and and null-terminate the text (the VFS expects
5401          * null-termination).
5402          */
5403         xdr_terminate_string(rcvbuf, len);
5404         return 0;
5405 out_overflow:
5406         print_overflow_msg(__func__, xdr);
5407         return -EIO;
5408 }
5409
5410 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5411 {
5412         int status;
5413
5414         status = decode_op_hdr(xdr, OP_REMOVE);
5415         if (status)
5416                 goto out;
5417         status = decode_change_info(xdr, cinfo);
5418 out:
5419         return status;
5420 }
5421
5422 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5423               struct nfs4_change_info *new_cinfo)
5424 {
5425         int status;
5426
5427         status = decode_op_hdr(xdr, OP_RENAME);
5428         if (status)
5429                 goto out;
5430         if ((status = decode_change_info(xdr, old_cinfo)))
5431                 goto out;
5432         status = decode_change_info(xdr, new_cinfo);
5433 out:
5434         return status;
5435 }
5436
5437 static int decode_renew(struct xdr_stream *xdr)
5438 {
5439         return decode_op_hdr(xdr, OP_RENEW);
5440 }
5441
5442 static int
5443 decode_restorefh(struct xdr_stream *xdr)
5444 {
5445         return decode_op_hdr(xdr, OP_RESTOREFH);
5446 }
5447
5448 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5449                          struct nfs_getaclres *res)
5450 {
5451         unsigned int savep;
5452         uint32_t attrlen,
5453                  bitmap[3] = {0};
5454         int status;
5455         unsigned int pg_offset;
5456
5457         res->acl_len = 0;
5458         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5459                 goto out;
5460
5461         xdr_enter_page(xdr, xdr->buf->page_len);
5462
5463         /* Calculate the offset of the page data */
5464         pg_offset = xdr->buf->head[0].iov_len;
5465
5466         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5467                 goto out;
5468         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5469                 goto out;
5470
5471         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5472                 return -EIO;
5473         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5474
5475                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5476                  * are stored with the acl data to handle the problem of
5477                  * variable length bitmaps.*/
5478                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5479                 res->acl_len = attrlen;
5480
5481                 /* Check for receive buffer overflow */
5482                 if (res->acl_len > (xdr->nwords << 2) ||
5483                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5484                         res->acl_flags |= NFS4_ACL_TRUNC;
5485                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5486                                         attrlen, xdr->nwords << 2);
5487                 }
5488         } else
5489                 status = -EOPNOTSUPP;
5490
5491 out:
5492         return status;
5493 }
5494
5495 static int
5496 decode_savefh(struct xdr_stream *xdr)
5497 {
5498         return decode_op_hdr(xdr, OP_SAVEFH);
5499 }
5500
5501 static int decode_setattr(struct xdr_stream *xdr)
5502 {
5503         int status;
5504
5505         status = decode_op_hdr(xdr, OP_SETATTR);
5506         if (status)
5507                 return status;
5508         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5509                 return 0;
5510         print_overflow_msg(__func__, xdr);
5511         return -EIO;
5512 }
5513
5514 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5515 {
5516         __be32 *p;
5517         uint32_t opnum;
5518         int32_t nfserr;
5519
5520         p = xdr_inline_decode(xdr, 8);
5521         if (unlikely(!p))
5522                 goto out_overflow;
5523         opnum = be32_to_cpup(p++);
5524         if (opnum != OP_SETCLIENTID) {
5525                 dprintk("nfs: decode_setclientid: Server returned operation"
5526                         " %d\n", opnum);
5527                 return -EIO;
5528         }
5529         nfserr = be32_to_cpup(p);
5530         if (nfserr == NFS_OK) {
5531                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5532                 if (unlikely(!p))
5533                         goto out_overflow;
5534                 p = xdr_decode_hyper(p, &res->clientid);
5535                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5536         } else if (nfserr == NFSERR_CLID_INUSE) {
5537                 uint32_t len;
5538
5539                 /* skip netid string */
5540                 p = xdr_inline_decode(xdr, 4);
5541                 if (unlikely(!p))
5542                         goto out_overflow;
5543                 len = be32_to_cpup(p);
5544                 p = xdr_inline_decode(xdr, len);
5545                 if (unlikely(!p))
5546                         goto out_overflow;
5547
5548                 /* skip uaddr string */
5549                 p = xdr_inline_decode(xdr, 4);
5550                 if (unlikely(!p))
5551                         goto out_overflow;
5552                 len = be32_to_cpup(p);
5553                 p = xdr_inline_decode(xdr, len);
5554                 if (unlikely(!p))
5555                         goto out_overflow;
5556                 return -NFSERR_CLID_INUSE;
5557         } else
5558                 return nfs4_stat_to_errno(nfserr);
5559
5560         return 0;
5561 out_overflow:
5562         print_overflow_msg(__func__, xdr);
5563         return -EIO;
5564 }
5565
5566 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5567 {
5568         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5569 }
5570
5571 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5572 {
5573         __be32 *p;
5574         int status;
5575
5576         status = decode_op_hdr(xdr, OP_WRITE);
5577         if (status)
5578                 return status;
5579
5580         p = xdr_inline_decode(xdr, 8);
5581         if (unlikely(!p))
5582                 goto out_overflow;
5583         res->count = be32_to_cpup(p++);
5584         res->verf->committed = be32_to_cpup(p++);
5585         return decode_write_verifier(xdr, &res->verf->verifier);
5586 out_overflow:
5587         print_overflow_msg(__func__, xdr);
5588         return -EIO;
5589 }
5590
5591 static int decode_delegreturn(struct xdr_stream *xdr)
5592 {
5593         return decode_op_hdr(xdr, OP_DELEGRETURN);
5594 }
5595
5596 static int decode_secinfo_gss(struct xdr_stream *xdr,
5597                               struct nfs4_secinfo4 *flavor)
5598 {
5599         u32 oid_len;
5600         __be32 *p;
5601
5602         p = xdr_inline_decode(xdr, 4);
5603         if (unlikely(!p))
5604                 goto out_overflow;
5605         oid_len = be32_to_cpup(p);
5606         if (oid_len > GSS_OID_MAX_LEN)
5607                 goto out_err;
5608
5609         p = xdr_inline_decode(xdr, oid_len);
5610         if (unlikely(!p))
5611                 goto out_overflow;
5612         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5613         flavor->flavor_info.oid.len = oid_len;
5614
5615         p = xdr_inline_decode(xdr, 8);
5616         if (unlikely(!p))
5617                 goto out_overflow;
5618         flavor->flavor_info.qop = be32_to_cpup(p++);
5619         flavor->flavor_info.service = be32_to_cpup(p);
5620
5621         return 0;
5622
5623 out_overflow:
5624         print_overflow_msg(__func__, xdr);
5625         return -EIO;
5626 out_err:
5627         return -EINVAL;
5628 }
5629
5630 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5631 {
5632         struct nfs4_secinfo4 *sec_flavor;
5633         unsigned int i, num_flavors;
5634         int status;
5635         __be32 *p;
5636
5637         p = xdr_inline_decode(xdr, 4);
5638         if (unlikely(!p))
5639                 goto out_overflow;
5640
5641         res->flavors->num_flavors = 0;
5642         num_flavors = be32_to_cpup(p);
5643
5644         for (i = 0; i < num_flavors; i++) {
5645                 sec_flavor = &res->flavors->flavors[i];
5646                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5647                         break;
5648
5649                 p = xdr_inline_decode(xdr, 4);
5650                 if (unlikely(!p))
5651                         goto out_overflow;
5652                 sec_flavor->flavor = be32_to_cpup(p);
5653
5654                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5655                         status = decode_secinfo_gss(xdr, sec_flavor);
5656                         if (status)
5657                                 goto out;
5658                 }
5659                 res->flavors->num_flavors++;
5660         }
5661
5662         status = 0;
5663 out:
5664         return status;
5665 out_overflow:
5666         print_overflow_msg(__func__, xdr);
5667         return -EIO;
5668 }
5669
5670 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5671 {
5672         int status = decode_op_hdr(xdr, OP_SECINFO);
5673         if (status)
5674                 return status;
5675         return decode_secinfo_common(xdr, res);
5676 }
5677
5678 #if defined(CONFIG_NFS_V4_1)
5679 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5680 {
5681         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5682         if (status)
5683                 return status;
5684         return decode_secinfo_common(xdr, res);
5685 }
5686
5687 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5688 {
5689         __be32 *p;
5690         uint32_t bitmap_words;
5691         unsigned int i;
5692
5693         p = xdr_inline_decode(xdr, 4);
5694         if (!p)
5695                 return -EIO;
5696         bitmap_words = be32_to_cpup(p++);
5697         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5698                 return -EIO;
5699         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5700         for (i = 0; i < bitmap_words; i++)
5701                 op_map->u.words[i] = be32_to_cpup(p++);
5702
5703         return 0;
5704 }
5705
5706 static int decode_exchange_id(struct xdr_stream *xdr,
5707                               struct nfs41_exchange_id_res *res)
5708 {
5709         __be32 *p;
5710         uint32_t dummy;
5711         char *dummy_str;
5712         int status;
5713         uint32_t impl_id_count;
5714
5715         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5716         if (status)
5717                 return status;
5718
5719         p = xdr_inline_decode(xdr, 8);
5720         if (unlikely(!p))
5721                 goto out_overflow;
5722         xdr_decode_hyper(p, &res->clientid);
5723         p = xdr_inline_decode(xdr, 12);
5724         if (unlikely(!p))
5725                 goto out_overflow;
5726         res->seqid = be32_to_cpup(p++);
5727         res->flags = be32_to_cpup(p++);
5728
5729         res->state_protect.how = be32_to_cpup(p);
5730         switch (res->state_protect.how) {
5731         case SP4_NONE:
5732                 break;
5733         case SP4_MACH_CRED:
5734                 status = decode_op_map(xdr, &res->state_protect.enforce);
5735                 if (status)
5736                         return status;
5737                 status = decode_op_map(xdr, &res->state_protect.allow);
5738                 if (status)
5739                         return status;
5740                 break;
5741         default:
5742                 WARN_ON_ONCE(1);
5743                 return -EIO;
5744         }
5745
5746         /* server_owner4.so_minor_id */
5747         p = xdr_inline_decode(xdr, 8);
5748         if (unlikely(!p))
5749                 goto out_overflow;
5750         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5751
5752         /* server_owner4.so_major_id */
5753         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5754         if (unlikely(status))
5755                 return status;
5756         memcpy(res->server_owner->major_id, dummy_str, dummy);
5757         res->server_owner->major_id_sz = dummy;
5758
5759         /* server_scope4 */
5760         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5761         if (unlikely(status))
5762                 return status;
5763         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5764         res->server_scope->server_scope_sz = dummy;
5765
5766         /* Implementation Id */
5767         p = xdr_inline_decode(xdr, 4);
5768         if (unlikely(!p))
5769                 goto out_overflow;
5770         impl_id_count = be32_to_cpup(p++);
5771
5772         if (impl_id_count) {
5773                 /* nii_domain */
5774                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5775                 if (unlikely(status))
5776                         return status;
5777                 memcpy(res->impl_id->domain, dummy_str, dummy);
5778
5779                 /* nii_name */
5780                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5781                 if (unlikely(status))
5782                         return status;
5783                 memcpy(res->impl_id->name, dummy_str, dummy);
5784
5785                 /* nii_date */
5786                 p = xdr_inline_decode(xdr, 12);
5787                 if (unlikely(!p))
5788                         goto out_overflow;
5789                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5790                 res->impl_id->date.nseconds = be32_to_cpup(p);
5791
5792                 /* if there's more than one entry, ignore the rest */
5793         }
5794         return 0;
5795 out_overflow:
5796         print_overflow_msg(__func__, xdr);
5797         return -EIO;
5798 }
5799
5800 static int decode_chan_attrs(struct xdr_stream *xdr,
5801                              struct nfs4_channel_attrs *attrs)
5802 {
5803         __be32 *p;
5804         u32 nr_attrs, val;
5805
5806         p = xdr_inline_decode(xdr, 28);
5807         if (unlikely(!p))
5808                 goto out_overflow;
5809         val = be32_to_cpup(p++);        /* headerpadsz */
5810         if (val)
5811                 return -EINVAL;         /* no support for header padding yet */
5812         attrs->max_rqst_sz = be32_to_cpup(p++);
5813         attrs->max_resp_sz = be32_to_cpup(p++);
5814         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5815         attrs->max_ops = be32_to_cpup(p++);
5816         attrs->max_reqs = be32_to_cpup(p++);
5817         nr_attrs = be32_to_cpup(p);
5818         if (unlikely(nr_attrs > 1)) {
5819                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5820                         "count %u\n", __func__, nr_attrs);
5821                 return -EINVAL;
5822         }
5823         if (nr_attrs == 1) {
5824                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5825                 if (unlikely(!p))
5826                         goto out_overflow;
5827         }
5828         return 0;
5829 out_overflow:
5830         print_overflow_msg(__func__, xdr);
5831         return -EIO;
5832 }
5833
5834 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5835 {
5836         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5837 }
5838
5839 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5840                                 struct nfs41_bind_conn_to_session_res *res)
5841 {
5842         __be32 *p;
5843         int status;
5844
5845         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5846         if (!status)
5847                 status = decode_sessionid(xdr, &res->sessionid);
5848         if (unlikely(status))
5849                 return status;
5850
5851         /* dir flags, rdma mode bool */
5852         p = xdr_inline_decode(xdr, 8);
5853         if (unlikely(!p))
5854                 goto out_overflow;
5855
5856         res->dir = be32_to_cpup(p++);
5857         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5858                 return -EIO;
5859         if (be32_to_cpup(p) == 0)
5860                 res->use_conn_in_rdma_mode = false;
5861         else
5862                 res->use_conn_in_rdma_mode = true;
5863
5864         return 0;
5865 out_overflow:
5866         print_overflow_msg(__func__, xdr);
5867         return -EIO;
5868 }
5869
5870 static int decode_create_session(struct xdr_stream *xdr,
5871                                  struct nfs41_create_session_res *res)
5872 {
5873         __be32 *p;
5874         int status;
5875
5876         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5877         if (!status)
5878                 status = decode_sessionid(xdr, &res->sessionid);
5879         if (unlikely(status))
5880                 return status;
5881
5882         /* seqid, flags */
5883         p = xdr_inline_decode(xdr, 8);
5884         if (unlikely(!p))
5885                 goto out_overflow;
5886         res->seqid = be32_to_cpup(p++);
5887         res->flags = be32_to_cpup(p);
5888
5889         /* Channel attributes */
5890         status = decode_chan_attrs(xdr, &res->fc_attrs);
5891         if (!status)
5892                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5893         return status;
5894 out_overflow:
5895         print_overflow_msg(__func__, xdr);
5896         return -EIO;
5897 }
5898
5899 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5900 {
5901         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5902 }
5903
5904 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5905 {
5906         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5907 }
5908
5909 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5910 {
5911         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5912 }
5913 #endif /* CONFIG_NFS_V4_1 */
5914
5915 static int decode_sequence(struct xdr_stream *xdr,
5916                            struct nfs4_sequence_res *res,
5917                            struct rpc_rqst *rqstp)
5918 {
5919 #if defined(CONFIG_NFS_V4_1)
5920         struct nfs4_session *session;
5921         struct nfs4_sessionid id;
5922         u32 dummy;
5923         int status;
5924         __be32 *p;
5925
5926         if (res->sr_slot == NULL)
5927                 return 0;
5928         if (!res->sr_slot->table->session)
5929                 return 0;
5930
5931         status = decode_op_hdr(xdr, OP_SEQUENCE);
5932         if (!status)
5933                 status = decode_sessionid(xdr, &id);
5934         if (unlikely(status))
5935                 goto out_err;
5936
5937         /*
5938          * If the server returns different values for sessionID, slotID or
5939          * sequence number, the server is looney tunes.
5940          */
5941         status = -EREMOTEIO;
5942         session = res->sr_slot->table->session;
5943
5944         if (memcmp(id.data, session->sess_id.data,
5945                    NFS4_MAX_SESSIONID_LEN)) {
5946                 dprintk("%s Invalid session id\n", __func__);
5947                 goto out_err;
5948         }
5949
5950         p = xdr_inline_decode(xdr, 20);
5951         if (unlikely(!p))
5952                 goto out_overflow;
5953
5954         /* seqid */
5955         dummy = be32_to_cpup(p++);
5956         if (dummy != res->sr_slot->seq_nr) {
5957                 dprintk("%s Invalid sequence number\n", __func__);
5958                 goto out_err;
5959         }
5960         /* slot id */
5961         dummy = be32_to_cpup(p++);
5962         if (dummy != res->sr_slot->slot_nr) {
5963                 dprintk("%s Invalid slot id\n", __func__);
5964                 goto out_err;
5965         }
5966         /* highest slot id */
5967         res->sr_highest_slotid = be32_to_cpup(p++);
5968         /* target highest slot id */
5969         res->sr_target_highest_slotid = be32_to_cpup(p++);
5970         /* result flags */
5971         res->sr_status_flags = be32_to_cpup(p);
5972         status = 0;
5973 out_err:
5974         res->sr_status = status;
5975         return status;
5976 out_overflow:
5977         print_overflow_msg(__func__, xdr);
5978         status = -EIO;
5979         goto out_err;
5980 #else  /* CONFIG_NFS_V4_1 */
5981         return 0;
5982 #endif /* CONFIG_NFS_V4_1 */
5983 }
5984
5985 #if defined(CONFIG_NFS_V4_1)
5986 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5987 {
5988         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5989         return decode_stateid(xdr, stateid);
5990 }
5991
5992 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5993                                 struct nfs4_getdeviceinfo_res *res)
5994 {
5995         struct pnfs_device *pdev = res->pdev;
5996         __be32 *p;
5997         uint32_t len, type;
5998         int status;
5999
6000         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
6001         if (status) {
6002                 if (status == -ETOOSMALL) {
6003                         p = xdr_inline_decode(xdr, 4);
6004                         if (unlikely(!p))
6005                                 goto out_overflow;
6006                         pdev->mincount = be32_to_cpup(p);
6007                         dprintk("%s: Min count too small. mincnt = %u\n",
6008                                 __func__, pdev->mincount);
6009                 }
6010                 return status;
6011         }
6012
6013         p = xdr_inline_decode(xdr, 8);
6014         if (unlikely(!p))
6015                 goto out_overflow;
6016         type = be32_to_cpup(p++);
6017         if (type != pdev->layout_type) {
6018                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
6019                         __func__, pdev->layout_type, type);
6020                 return -EINVAL;
6021         }
6022         /*
6023          * Get the length of the opaque device_addr4. xdr_read_pages places
6024          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
6025          * and places the remaining xdr data in xdr_buf->tail
6026          */
6027         pdev->mincount = be32_to_cpup(p);
6028         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
6029                 goto out_overflow;
6030
6031         /* Parse notification bitmap, verifying that it is zero. */
6032         p = xdr_inline_decode(xdr, 4);
6033         if (unlikely(!p))
6034                 goto out_overflow;
6035         len = be32_to_cpup(p);
6036         if (len) {
6037                 uint32_t i;
6038
6039                 p = xdr_inline_decode(xdr, 4 * len);
6040                 if (unlikely(!p))
6041                         goto out_overflow;
6042
6043                 res->notification = be32_to_cpup(p++);
6044                 for (i = 1; i < len; i++) {
6045                         if (be32_to_cpup(p++)) {
6046                                 dprintk("%s: unsupported notification\n",
6047                                         __func__);
6048                                 return -EIO;
6049                         }
6050                 }
6051         }
6052         return 0;
6053 out_overflow:
6054         print_overflow_msg(__func__, xdr);
6055         return -EIO;
6056 }
6057
6058 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6059                             struct nfs4_layoutget_res *res)
6060 {
6061         __be32 *p;
6062         int status;
6063         u32 layout_count;
6064         u32 recvd;
6065
6066         status = decode_op_hdr(xdr, OP_LAYOUTGET);
6067         if (status)
6068                 goto out;
6069         p = xdr_inline_decode(xdr, 4);
6070         if (unlikely(!p))
6071                 goto out_overflow;
6072         res->return_on_close = be32_to_cpup(p);
6073         decode_layout_stateid(xdr, &res->stateid);
6074         p = xdr_inline_decode(xdr, 4);
6075         if (unlikely(!p))
6076                 goto out_overflow;
6077         layout_count = be32_to_cpup(p);
6078         if (!layout_count) {
6079                 dprintk("%s: server responded with empty layout array\n",
6080                         __func__);
6081                 status = -EINVAL;
6082                 goto out;
6083         }
6084
6085         p = xdr_inline_decode(xdr, 28);
6086         if (unlikely(!p))
6087                 goto out_overflow;
6088         p = xdr_decode_hyper(p, &res->range.offset);
6089         p = xdr_decode_hyper(p, &res->range.length);
6090         res->range.iomode = be32_to_cpup(p++);
6091         res->type = be32_to_cpup(p++);
6092         res->layoutp->len = be32_to_cpup(p);
6093
6094         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6095                 __func__,
6096                 (unsigned long)res->range.offset,
6097                 (unsigned long)res->range.length,
6098                 res->range.iomode,
6099                 res->type,
6100                 res->layoutp->len);
6101
6102         recvd = xdr_read_pages(xdr, res->layoutp->len);
6103         if (res->layoutp->len > recvd) {
6104                 dprintk("NFS: server cheating in layoutget reply: "
6105                                 "layout len %u > recvd %u\n",
6106                                 res->layoutp->len, recvd);
6107                 status = -EINVAL;
6108                 goto out;
6109         }
6110
6111         if (layout_count > 1) {
6112                 /* We only handle a length one array at the moment.  Any
6113                  * further entries are just ignored.  Note that this means
6114                  * the client may see a response that is less than the
6115                  * minimum it requested.
6116                  */
6117                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6118                         __func__, layout_count);
6119         }
6120
6121 out:
6122         res->status = status;
6123         return status;
6124 out_overflow:
6125         print_overflow_msg(__func__, xdr);
6126         status = -EIO;
6127         goto out;
6128 }
6129
6130 static int decode_layoutreturn(struct xdr_stream *xdr,
6131                                struct nfs4_layoutreturn_res *res)
6132 {
6133         __be32 *p;
6134         int status;
6135
6136         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6137         if (status)
6138                 return status;
6139         p = xdr_inline_decode(xdr, 4);
6140         if (unlikely(!p))
6141                 goto out_overflow;
6142         res->lrs_present = be32_to_cpup(p);
6143         if (res->lrs_present)
6144                 status = decode_layout_stateid(xdr, &res->stateid);
6145         else
6146                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6147         return status;
6148 out_overflow:
6149         print_overflow_msg(__func__, xdr);
6150         return -EIO;
6151 }
6152
6153 static int decode_layoutcommit(struct xdr_stream *xdr,
6154                                struct rpc_rqst *req,
6155                                struct nfs4_layoutcommit_res *res)
6156 {
6157         __be32 *p;
6158         __u32 sizechanged;
6159         int status;
6160
6161         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6162         res->status = status;
6163         if (status)
6164                 return status;
6165
6166         p = xdr_inline_decode(xdr, 4);
6167         if (unlikely(!p))
6168                 goto out_overflow;
6169         sizechanged = be32_to_cpup(p);
6170
6171         if (sizechanged) {
6172                 /* throw away new size */
6173                 p = xdr_inline_decode(xdr, 8);
6174                 if (unlikely(!p))
6175                         goto out_overflow;
6176         }
6177         return 0;
6178 out_overflow:
6179         print_overflow_msg(__func__, xdr);
6180         return -EIO;
6181 }
6182
6183 static int decode_test_stateid(struct xdr_stream *xdr,
6184                                struct nfs41_test_stateid_res *res)
6185 {
6186         __be32 *p;
6187         int status;
6188         int num_res;
6189
6190         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6191         if (status)
6192                 return status;
6193
6194         p = xdr_inline_decode(xdr, 4);
6195         if (unlikely(!p))
6196                 goto out_overflow;
6197         num_res = be32_to_cpup(p++);
6198         if (num_res != 1)
6199                 goto out;
6200
6201         p = xdr_inline_decode(xdr, 4);
6202         if (unlikely(!p))
6203                 goto out_overflow;
6204         res->status = be32_to_cpup(p++);
6205
6206         return status;
6207 out_overflow:
6208         print_overflow_msg(__func__, xdr);
6209 out:
6210         return -EIO;
6211 }
6212
6213 static int decode_free_stateid(struct xdr_stream *xdr,
6214                                struct nfs41_free_stateid_res *res)
6215 {
6216         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6217         return res->status;
6218 }
6219 #else
6220 static inline
6221 int decode_layoutreturn(struct xdr_stream *xdr,
6222                                struct nfs4_layoutreturn_res *res)
6223 {
6224         return 0;
6225 }
6226
6227 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6228                             struct nfs4_layoutget_res *res)
6229 {
6230         return 0;
6231 }
6232
6233 #endif /* CONFIG_NFS_V4_1 */
6234
6235 /*
6236  * END OF "GENERIC" DECODE ROUTINES.
6237  */
6238
6239 /*
6240  * Decode OPEN_DOWNGRADE response
6241  */
6242 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6243                                        struct xdr_stream *xdr,
6244                                        void *data)
6245 {
6246         struct nfs_closeres *res = data;
6247         struct compound_hdr hdr;
6248         int status;
6249
6250         status = decode_compound_hdr(xdr, &hdr);
6251         if (status)
6252                 goto out;
6253         status = decode_sequence(xdr, &res->seq_res, rqstp);
6254         if (status)
6255                 goto out;
6256         status = decode_putfh(xdr);
6257         if (status)
6258                 goto out;
6259         if (res->lr_res) {
6260                 status = decode_layoutreturn(xdr, res->lr_res);
6261                 res->lr_ret = status;
6262                 if (status)
6263                         goto out;
6264         }
6265         status = decode_open_downgrade(xdr, res);
6266 out:
6267         return status;
6268 }
6269
6270 /*
6271  * Decode ACCESS response
6272  */
6273 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6274                                void *data)
6275 {
6276         struct nfs4_accessres *res = data;
6277         struct compound_hdr hdr;
6278         int status;
6279
6280         status = decode_compound_hdr(xdr, &hdr);
6281         if (status)
6282                 goto out;
6283         status = decode_sequence(xdr, &res->seq_res, rqstp);
6284         if (status)
6285                 goto out;
6286         status = decode_putfh(xdr);
6287         if (status != 0)
6288                 goto out;
6289         status = decode_access(xdr, &res->supported, &res->access);
6290         if (status != 0)
6291                 goto out;
6292         if (res->fattr)
6293                 decode_getfattr(xdr, res->fattr, res->server);
6294 out:
6295         return status;
6296 }
6297
6298 /*
6299  * Decode LOOKUP response
6300  */
6301 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6302                                void *data)
6303 {
6304         struct nfs4_lookup_res *res = data;
6305         struct compound_hdr hdr;
6306         int status;
6307
6308         status = decode_compound_hdr(xdr, &hdr);
6309         if (status)
6310                 goto out;
6311         status = decode_sequence(xdr, &res->seq_res, rqstp);
6312         if (status)
6313                 goto out;
6314         status = decode_putfh(xdr);
6315         if (status)
6316                 goto out;
6317         status = decode_lookup(xdr);
6318         if (status)
6319                 goto out;
6320         status = decode_getfh(xdr, res->fh);
6321         if (status)
6322                 goto out;
6323         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6324 out:
6325         return status;
6326 }
6327
6328 /*
6329  * Decode LOOKUPP response
6330  */
6331 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6332                 void *data)
6333 {
6334         struct nfs4_lookupp_res *res = data;
6335         struct compound_hdr hdr;
6336         int status;
6337
6338         status = decode_compound_hdr(xdr, &hdr);
6339         if (status)
6340                 goto out;
6341         status = decode_sequence(xdr, &res->seq_res, rqstp);
6342         if (status)
6343                 goto out;
6344         status = decode_putfh(xdr);
6345         if (status)
6346                 goto out;
6347         status = decode_lookupp(xdr);
6348         if (status)
6349                 goto out;
6350         status = decode_getfh(xdr, res->fh);
6351         if (status)
6352                 goto out;
6353         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6354 out:
6355         return status;
6356 }
6357
6358 /*
6359  * Decode LOOKUP_ROOT response
6360  */
6361 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6362                                     struct xdr_stream *xdr,
6363                                     void *data)
6364 {
6365         struct nfs4_lookup_res *res = data;
6366         struct compound_hdr hdr;
6367         int status;
6368
6369         status = decode_compound_hdr(xdr, &hdr);
6370         if (status)
6371                 goto out;
6372         status = decode_sequence(xdr, &res->seq_res, rqstp);
6373         if (status)
6374                 goto out;
6375         status = decode_putrootfh(xdr);
6376         if (status)
6377                 goto out;
6378         status = decode_getfh(xdr, res->fh);
6379         if (status == 0)
6380                 status = decode_getfattr_label(xdr, res->fattr,
6381                                                 res->label, res->server);
6382 out:
6383         return status;
6384 }
6385
6386 /*
6387  * Decode REMOVE response
6388  */
6389 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6390                                void *data)
6391 {
6392         struct nfs_removeres *res = data;
6393         struct compound_hdr hdr;
6394         int status;
6395
6396         status = decode_compound_hdr(xdr, &hdr);
6397         if (status)
6398                 goto out;
6399         status = decode_sequence(xdr, &res->seq_res, rqstp);
6400         if (status)
6401                 goto out;
6402         status = decode_putfh(xdr);
6403         if (status)
6404                 goto out;
6405         status = decode_remove(xdr, &res->cinfo);
6406 out:
6407         return status;
6408 }
6409
6410 /*
6411  * Decode RENAME response
6412  */
6413 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6414                                void *data)
6415 {
6416         struct nfs_renameres *res = data;
6417         struct compound_hdr hdr;
6418         int status;
6419
6420         status = decode_compound_hdr(xdr, &hdr);
6421         if (status)
6422                 goto out;
6423         status = decode_sequence(xdr, &res->seq_res, rqstp);
6424         if (status)
6425                 goto out;
6426         status = decode_putfh(xdr);
6427         if (status)
6428                 goto out;
6429         status = decode_savefh(xdr);
6430         if (status)
6431                 goto out;
6432         status = decode_putfh(xdr);
6433         if (status)
6434                 goto out;
6435         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6436 out:
6437         return status;
6438 }
6439
6440 /*
6441  * Decode LINK response
6442  */
6443 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6444                              void *data)
6445 {
6446         struct nfs4_link_res *res = data;
6447         struct compound_hdr hdr;
6448         int status;
6449
6450         status = decode_compound_hdr(xdr, &hdr);
6451         if (status)
6452                 goto out;
6453         status = decode_sequence(xdr, &res->seq_res, rqstp);
6454         if (status)
6455                 goto out;
6456         status = decode_putfh(xdr);
6457         if (status)
6458                 goto out;
6459         status = decode_savefh(xdr);
6460         if (status)
6461                 goto out;
6462         status = decode_putfh(xdr);
6463         if (status)
6464                 goto out;
6465         status = decode_link(xdr, &res->cinfo);
6466         if (status)
6467                 goto out;
6468         /*
6469          * Note order: OP_LINK leaves the directory as the current
6470          *             filehandle.
6471          */
6472         status = decode_restorefh(xdr);
6473         if (status)
6474                 goto out;
6475         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6476 out:
6477         return status;
6478 }
6479
6480 /*
6481  * Decode CREATE response
6482  */
6483 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6484                                void *data)
6485 {
6486         struct nfs4_create_res *res = data;
6487         struct compound_hdr hdr;
6488         int status;
6489
6490         status = decode_compound_hdr(xdr, &hdr);
6491         if (status)
6492                 goto out;
6493         status = decode_sequence(xdr, &res->seq_res, rqstp);
6494         if (status)
6495                 goto out;
6496         status = decode_putfh(xdr);
6497         if (status)
6498                 goto out;
6499         status = decode_create(xdr, &res->dir_cinfo);
6500         if (status)
6501                 goto out;
6502         status = decode_getfh(xdr, res->fh);
6503         if (status)
6504                 goto out;
6505         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6506 out:
6507         return status;
6508 }
6509
6510 /*
6511  * Decode SYMLINK response
6512  */
6513 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6514                                 void *res)
6515 {
6516         return nfs4_xdr_dec_create(rqstp, xdr, res);
6517 }
6518
6519 /*
6520  * Decode GETATTR response
6521  */
6522 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6523                                 void *data)
6524 {
6525         struct nfs4_getattr_res *res = data;
6526         struct compound_hdr hdr;
6527         int status;
6528
6529         status = decode_compound_hdr(xdr, &hdr);
6530         if (status)
6531                 goto out;
6532         status = decode_sequence(xdr, &res->seq_res, rqstp);
6533         if (status)
6534                 goto out;
6535         status = decode_putfh(xdr);
6536         if (status)
6537                 goto out;
6538         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6539 out:
6540         return status;
6541 }
6542
6543 /*
6544  * Encode an SETACL request
6545  */
6546 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6547                                 const void *data)
6548 {
6549         const struct nfs_setaclargs *args = data;
6550         struct compound_hdr hdr = {
6551                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6552         };
6553
6554         encode_compound_hdr(xdr, req, &hdr);
6555         encode_sequence(xdr, &args->seq_args, &hdr);
6556         encode_putfh(xdr, args->fh, &hdr);
6557         encode_setacl(xdr, args, &hdr);
6558         encode_nops(&hdr);
6559 }
6560
6561 /*
6562  * Decode SETACL response
6563  */
6564 static int
6565 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6566                     void *data)
6567 {
6568         struct nfs_setaclres *res = data;
6569         struct compound_hdr hdr;
6570         int status;
6571
6572         status = decode_compound_hdr(xdr, &hdr);
6573         if (status)
6574                 goto out;
6575         status = decode_sequence(xdr, &res->seq_res, rqstp);
6576         if (status)
6577                 goto out;
6578         status = decode_putfh(xdr);
6579         if (status)
6580                 goto out;
6581         status = decode_setattr(xdr);
6582 out:
6583         return status;
6584 }
6585
6586 /*
6587  * Decode GETACL response
6588  */
6589 static int
6590 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6591                     void *data)
6592 {
6593         struct nfs_getaclres *res = data;
6594         struct compound_hdr hdr;
6595         int status;
6596
6597         if (res->acl_scratch != NULL) {
6598                 void *p = page_address(res->acl_scratch);
6599                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6600         }
6601         status = decode_compound_hdr(xdr, &hdr);
6602         if (status)
6603                 goto out;
6604         status = decode_sequence(xdr, &res->seq_res, rqstp);
6605         if (status)
6606                 goto out;
6607         status = decode_putfh(xdr);
6608         if (status)
6609                 goto out;
6610         status = decode_getacl(xdr, rqstp, res);
6611
6612 out:
6613         return status;
6614 }
6615
6616 /*
6617  * Decode CLOSE response
6618  */
6619 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6620                               void *data)
6621 {
6622         struct nfs_closeres *res = data;
6623         struct compound_hdr hdr;
6624         int status;
6625
6626         status = decode_compound_hdr(xdr, &hdr);
6627         if (status)
6628                 goto out;
6629         status = decode_sequence(xdr, &res->seq_res, rqstp);
6630         if (status)
6631                 goto out;
6632         status = decode_putfh(xdr);
6633         if (status)
6634                 goto out;
6635         if (res->lr_res) {
6636                 status = decode_layoutreturn(xdr, res->lr_res);
6637                 res->lr_ret = status;
6638                 if (status)
6639                         goto out;
6640         }
6641         if (res->fattr != NULL) {
6642                 status = decode_getfattr(xdr, res->fattr, res->server);
6643                 if (status != 0)
6644                         goto out;
6645         }
6646         status = decode_close(xdr, res);
6647 out:
6648         return status;
6649 }
6650
6651 /*
6652  * Decode OPEN response
6653  */
6654 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6655                              void *data)
6656 {
6657         struct nfs_openres *res = data;
6658         struct compound_hdr hdr;
6659         int status;
6660
6661         status = decode_compound_hdr(xdr, &hdr);
6662         if (status)
6663                 goto out;
6664         status = decode_sequence(xdr, &res->seq_res, rqstp);
6665         if (status)
6666                 goto out;
6667         status = decode_putfh(xdr);
6668         if (status)
6669                 goto out;
6670         status = decode_open(xdr, res);
6671         if (status)
6672                 goto out;
6673         status = decode_getfh(xdr, &res->fh);
6674         if (status)
6675                 goto out;
6676         if (res->access_request)
6677                 decode_access(xdr, &res->access_supported, &res->access_result);
6678         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6679         if (res->lg_res)
6680                 decode_layoutget(xdr, rqstp, res->lg_res);
6681 out:
6682         return status;
6683 }
6684
6685 /*
6686  * Decode OPEN_CONFIRM response
6687  */
6688 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6689                                      struct xdr_stream *xdr,
6690                                      void *data)
6691 {
6692         struct nfs_open_confirmres *res = data;
6693         struct compound_hdr hdr;
6694         int status;
6695
6696         status = decode_compound_hdr(xdr, &hdr);
6697         if (status)
6698                 goto out;
6699         status = decode_putfh(xdr);
6700         if (status)
6701                 goto out;
6702         status = decode_open_confirm(xdr, res);
6703 out:
6704         return status;
6705 }
6706
6707 /*
6708  * Decode OPEN response
6709  */
6710 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6711                                     struct xdr_stream *xdr,
6712                                     void *data)
6713 {
6714         struct nfs_openres *res = data;
6715         struct compound_hdr hdr;
6716         int status;
6717
6718         status = decode_compound_hdr(xdr, &hdr);
6719         if (status)
6720                 goto out;
6721         status = decode_sequence(xdr, &res->seq_res, rqstp);
6722         if (status)
6723                 goto out;
6724         status = decode_putfh(xdr);
6725         if (status)
6726                 goto out;
6727         status = decode_open(xdr, res);
6728         if (status)
6729                 goto out;
6730         if (res->access_request)
6731                 decode_access(xdr, &res->access_supported, &res->access_result);
6732         decode_getfattr(xdr, res->f_attr, res->server);
6733         if (res->lg_res)
6734                 decode_layoutget(xdr, rqstp, res->lg_res);
6735 out:
6736         return status;
6737 }
6738
6739 /*
6740  * Decode SETATTR response
6741  */
6742 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6743                                 struct xdr_stream *xdr,
6744                                 void *data)
6745 {
6746         struct nfs_setattrres *res = data;
6747         struct compound_hdr hdr;
6748         int status;
6749
6750         status = decode_compound_hdr(xdr, &hdr);
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_setattr(xdr);
6760         if (status)
6761                 goto out;
6762         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6763 out:
6764         return status;
6765 }
6766
6767 /*
6768  * Decode LOCK response
6769  */
6770 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6771                              void *data)
6772 {
6773         struct nfs_lock_res *res = data;
6774         struct compound_hdr hdr;
6775         int status;
6776
6777         status = decode_compound_hdr(xdr, &hdr);
6778         if (status)
6779                 goto out;
6780         status = decode_sequence(xdr, &res->seq_res, rqstp);
6781         if (status)
6782                 goto out;
6783         status = decode_putfh(xdr);
6784         if (status)
6785                 goto out;
6786         status = decode_lock(xdr, res);
6787 out:
6788         return status;
6789 }
6790
6791 /*
6792  * Decode LOCKT response
6793  */
6794 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6795                               void *data)
6796 {
6797         struct nfs_lockt_res *res = data;
6798         struct compound_hdr hdr;
6799         int status;
6800
6801         status = decode_compound_hdr(xdr, &hdr);
6802         if (status)
6803                 goto out;
6804         status = decode_sequence(xdr, &res->seq_res, rqstp);
6805         if (status)
6806                 goto out;
6807         status = decode_putfh(xdr);
6808         if (status)
6809                 goto out;
6810         status = decode_lockt(xdr, res);
6811 out:
6812         return status;
6813 }
6814
6815 /*
6816  * Decode LOCKU response
6817  */
6818 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6819                               void *data)
6820 {
6821         struct nfs_locku_res *res = data;
6822         struct compound_hdr hdr;
6823         int status;
6824
6825         status = decode_compound_hdr(xdr, &hdr);
6826         if (status)
6827                 goto out;
6828         status = decode_sequence(xdr, &res->seq_res, rqstp);
6829         if (status)
6830                 goto out;
6831         status = decode_putfh(xdr);
6832         if (status)
6833                 goto out;
6834         status = decode_locku(xdr, res);
6835 out:
6836         return status;
6837 }
6838
6839 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6840                                           struct xdr_stream *xdr, void *dummy)
6841 {
6842         struct compound_hdr hdr;
6843         int status;
6844
6845         status = decode_compound_hdr(xdr, &hdr);
6846         if (!status)
6847                 status = decode_release_lockowner(xdr);
6848         return status;
6849 }
6850
6851 /*
6852  * Decode READLINK response
6853  */
6854 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6855                                  struct xdr_stream *xdr,
6856                                  void *data)
6857 {
6858         struct nfs4_readlink_res *res = data;
6859         struct compound_hdr hdr;
6860         int status;
6861
6862         status = decode_compound_hdr(xdr, &hdr);
6863         if (status)
6864                 goto out;
6865         status = decode_sequence(xdr, &res->seq_res, rqstp);
6866         if (status)
6867                 goto out;
6868         status = decode_putfh(xdr);
6869         if (status)
6870                 goto out;
6871         status = decode_readlink(xdr, rqstp);
6872 out:
6873         return status;
6874 }
6875
6876 /*
6877  * Decode READDIR response
6878  */
6879 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6880                                 void *data)
6881 {
6882         struct nfs4_readdir_res *res = data;
6883         struct compound_hdr hdr;
6884         int status;
6885
6886         status = decode_compound_hdr(xdr, &hdr);
6887         if (status)
6888                 goto out;
6889         status = decode_sequence(xdr, &res->seq_res, rqstp);
6890         if (status)
6891                 goto out;
6892         status = decode_putfh(xdr);
6893         if (status)
6894                 goto out;
6895         status = decode_readdir(xdr, rqstp, res);
6896 out:
6897         return status;
6898 }
6899
6900 /*
6901  * Decode Read response
6902  */
6903 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6904                              void *data)
6905 {
6906         struct nfs_pgio_res *res = data;
6907         struct compound_hdr hdr;
6908         int status;
6909
6910         status = decode_compound_hdr(xdr, &hdr);
6911         res->op_status = hdr.status;
6912         if (status)
6913                 goto out;
6914         status = decode_sequence(xdr, &res->seq_res, rqstp);
6915         if (status)
6916                 goto out;
6917         status = decode_putfh(xdr);
6918         if (status)
6919                 goto out;
6920         status = decode_read(xdr, rqstp, res);
6921         if (!status)
6922                 status = res->count;
6923 out:
6924         return status;
6925 }
6926
6927 /*
6928  * Decode WRITE response
6929  */
6930 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6931                               void *data)
6932 {
6933         struct nfs_pgio_res *res = data;
6934         struct compound_hdr hdr;
6935         int status;
6936
6937         status = decode_compound_hdr(xdr, &hdr);
6938         res->op_status = hdr.status;
6939         if (status)
6940                 goto out;
6941         status = decode_sequence(xdr, &res->seq_res, rqstp);
6942         if (status)
6943                 goto out;
6944         status = decode_putfh(xdr);
6945         if (status)
6946                 goto out;
6947         status = decode_write(xdr, res);
6948         if (status)
6949                 goto out;
6950         if (res->fattr)
6951                 decode_getfattr(xdr, res->fattr, res->server);
6952         if (!status)
6953                 status = res->count;
6954 out:
6955         return status;
6956 }
6957
6958 /*
6959  * Decode COMMIT response
6960  */
6961 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6962                                void *data)
6963 {
6964         struct nfs_commitres *res = data;
6965         struct compound_hdr hdr;
6966         int status;
6967
6968         status = decode_compound_hdr(xdr, &hdr);
6969         res->op_status = hdr.status;
6970         if (status)
6971                 goto out;
6972         status = decode_sequence(xdr, &res->seq_res, rqstp);
6973         if (status)
6974                 goto out;
6975         status = decode_putfh(xdr);
6976         if (status)
6977                 goto out;
6978         status = decode_commit(xdr, res);
6979 out:
6980         return status;
6981 }
6982
6983 /*
6984  * Decode FSINFO response
6985  */
6986 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6987                                void *data)
6988 {
6989         struct nfs4_fsinfo_res *res = data;
6990         struct compound_hdr hdr;
6991         int status;
6992
6993         status = decode_compound_hdr(xdr, &hdr);
6994         if (!status)
6995                 status = decode_sequence(xdr, &res->seq_res, req);
6996         if (!status)
6997                 status = decode_putfh(xdr);
6998         if (!status)
6999                 status = decode_fsinfo(xdr, res->fsinfo);
7000         return status;
7001 }
7002
7003 /*
7004  * Decode PATHCONF response
7005  */
7006 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
7007                                  void *data)
7008 {
7009         struct nfs4_pathconf_res *res = data;
7010         struct compound_hdr hdr;
7011         int status;
7012
7013         status = decode_compound_hdr(xdr, &hdr);
7014         if (!status)
7015                 status = decode_sequence(xdr, &res->seq_res, req);
7016         if (!status)
7017                 status = decode_putfh(xdr);
7018         if (!status)
7019                 status = decode_pathconf(xdr, res->pathconf);
7020         return status;
7021 }
7022
7023 /*
7024  * Decode STATFS response
7025  */
7026 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
7027                                void *data)
7028 {
7029         struct nfs4_statfs_res *res = data;
7030         struct compound_hdr hdr;
7031         int status;
7032
7033         status = decode_compound_hdr(xdr, &hdr);
7034         if (!status)
7035                 status = decode_sequence(xdr, &res->seq_res, req);
7036         if (!status)
7037                 status = decode_putfh(xdr);
7038         if (!status)
7039                 status = decode_statfs(xdr, res->fsstat);
7040         return status;
7041 }
7042
7043 /*
7044  * Decode GETATTR_BITMAP response
7045  */
7046 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
7047                                     struct xdr_stream *xdr,
7048                                     void *data)
7049 {
7050         struct nfs4_server_caps_res *res = data;
7051         struct compound_hdr hdr;
7052         int status;
7053
7054         status = decode_compound_hdr(xdr, &hdr);
7055         if (status)
7056                 goto out;
7057         status = decode_sequence(xdr, &res->seq_res, req);
7058         if (status)
7059                 goto out;
7060         status = decode_putfh(xdr);
7061         if (status)
7062                 goto out;
7063         status = decode_server_caps(xdr, res);
7064 out:
7065         return status;
7066 }
7067
7068 /*
7069  * Decode RENEW response
7070  */
7071 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7072                               void *__unused)
7073 {
7074         struct compound_hdr hdr;
7075         int status;
7076
7077         status = decode_compound_hdr(xdr, &hdr);
7078         if (!status)
7079                 status = decode_renew(xdr);
7080         return status;
7081 }
7082
7083 /*
7084  * Decode SETCLIENTID response
7085  */
7086 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7087                                     struct xdr_stream *xdr,
7088                                     void *data)
7089 {
7090         struct nfs4_setclientid_res *res = data;
7091         struct compound_hdr hdr;
7092         int status;
7093
7094         status = decode_compound_hdr(xdr, &hdr);
7095         if (!status)
7096                 status = decode_setclientid(xdr, res);
7097         return status;
7098 }
7099
7100 /*
7101  * Decode SETCLIENTID_CONFIRM response
7102  */
7103 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7104                                             struct xdr_stream *xdr,
7105                                             void *data)
7106 {
7107         struct compound_hdr hdr;
7108         int status;
7109
7110         status = decode_compound_hdr(xdr, &hdr);
7111         if (!status)
7112                 status = decode_setclientid_confirm(xdr);
7113         return status;
7114 }
7115
7116 /*
7117  * Decode DELEGRETURN response
7118  */
7119 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7120                                     struct xdr_stream *xdr,
7121                                     void *data)
7122 {
7123         struct nfs4_delegreturnres *res = data;
7124         struct compound_hdr hdr;
7125         int status;
7126
7127         status = decode_compound_hdr(xdr, &hdr);
7128         if (status)
7129                 goto out;
7130         status = decode_sequence(xdr, &res->seq_res, rqstp);
7131         if (status)
7132                 goto out;
7133         status = decode_putfh(xdr);
7134         if (status != 0)
7135                 goto out;
7136         if (res->lr_res) {
7137                 status = decode_layoutreturn(xdr, res->lr_res);
7138                 res->lr_ret = status;
7139                 if (status)
7140                         goto out;
7141         }
7142         if (res->fattr) {
7143                 status = decode_getfattr(xdr, res->fattr, res->server);
7144                 if (status != 0)
7145                         goto out;
7146         }
7147         status = decode_delegreturn(xdr);
7148 out:
7149         return status;
7150 }
7151
7152 /*
7153  * Decode FS_LOCATIONS response
7154  */
7155 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7156                                      struct xdr_stream *xdr,
7157                                      void *data)
7158 {
7159         struct nfs4_fs_locations_res *res = data;
7160         struct compound_hdr hdr;
7161         int status;
7162
7163         status = decode_compound_hdr(xdr, &hdr);
7164         if (status)
7165                 goto out;
7166         status = decode_sequence(xdr, &res->seq_res, req);
7167         if (status)
7168                 goto out;
7169         status = decode_putfh(xdr);
7170         if (status)
7171                 goto out;
7172         if (res->migration) {
7173                 xdr_enter_page(xdr, PAGE_SIZE);
7174                 status = decode_getfattr_generic(xdr,
7175                                         &res->fs_locations->fattr,
7176                                          NULL, res->fs_locations,
7177                                          NULL, res->fs_locations->server);
7178                 if (status)
7179                         goto out;
7180                 if (res->renew)
7181                         status = decode_renew(xdr);
7182         } else {
7183                 status = decode_lookup(xdr);
7184                 if (status)
7185                         goto out;
7186                 xdr_enter_page(xdr, PAGE_SIZE);
7187                 status = decode_getfattr_generic(xdr,
7188                                         &res->fs_locations->fattr,
7189                                          NULL, res->fs_locations,
7190                                          NULL, res->fs_locations->server);
7191         }
7192 out:
7193         return status;
7194 }
7195
7196 /*
7197  * Decode SECINFO response
7198  */
7199 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7200                                 struct xdr_stream *xdr,
7201                                 void *data)
7202 {
7203         struct nfs4_secinfo_res *res = data;
7204         struct compound_hdr hdr;
7205         int status;
7206
7207         status = decode_compound_hdr(xdr, &hdr);
7208         if (status)
7209                 goto out;
7210         status = decode_sequence(xdr, &res->seq_res, rqstp);
7211         if (status)
7212                 goto out;
7213         status = decode_putfh(xdr);
7214         if (status)
7215                 goto out;
7216         status = decode_secinfo(xdr, res);
7217 out:
7218         return status;
7219 }
7220
7221 /*
7222  * Decode FSID_PRESENT response
7223  */
7224 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7225                                      struct xdr_stream *xdr,
7226                                      void *data)
7227 {
7228         struct nfs4_fsid_present_res *res = data;
7229         struct compound_hdr hdr;
7230         int status;
7231
7232         status = decode_compound_hdr(xdr, &hdr);
7233         if (status)
7234                 goto out;
7235         status = decode_sequence(xdr, &res->seq_res, rqstp);
7236         if (status)
7237                 goto out;
7238         status = decode_putfh(xdr);
7239         if (status)
7240                 goto out;
7241         status = decode_getfh(xdr, res->fh);
7242         if (status)
7243                 goto out;
7244         if (res->renew)
7245                 status = decode_renew(xdr);
7246 out:
7247         return status;
7248 }
7249
7250 #if defined(CONFIG_NFS_V4_1)
7251 /*
7252  * Decode BIND_CONN_TO_SESSION response
7253  */
7254 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7255                                         struct xdr_stream *xdr,
7256                                         void *res)
7257 {
7258         struct compound_hdr hdr;
7259         int status;
7260
7261         status = decode_compound_hdr(xdr, &hdr);
7262         if (!status)
7263                 status = decode_bind_conn_to_session(xdr, res);
7264         return status;
7265 }
7266
7267 /*
7268  * Decode EXCHANGE_ID response
7269  */
7270 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7271                                     struct xdr_stream *xdr,
7272                                     void *res)
7273 {
7274         struct compound_hdr hdr;
7275         int status;
7276
7277         status = decode_compound_hdr(xdr, &hdr);
7278         if (!status)
7279                 status = decode_exchange_id(xdr, res);
7280         return status;
7281 }
7282
7283 /*
7284  * Decode CREATE_SESSION response
7285  */
7286 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7287                                        struct xdr_stream *xdr,
7288                                        void *res)
7289 {
7290         struct compound_hdr hdr;
7291         int status;
7292
7293         status = decode_compound_hdr(xdr, &hdr);
7294         if (!status)
7295                 status = decode_create_session(xdr, res);
7296         return status;
7297 }
7298
7299 /*
7300  * Decode DESTROY_SESSION response
7301  */
7302 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7303                                         struct xdr_stream *xdr,
7304                                         void *res)
7305 {
7306         struct compound_hdr hdr;
7307         int status;
7308
7309         status = decode_compound_hdr(xdr, &hdr);
7310         if (!status)
7311                 status = decode_destroy_session(xdr, res);
7312         return status;
7313 }
7314
7315 /*
7316  * Decode DESTROY_CLIENTID response
7317  */
7318 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7319                                         struct xdr_stream *xdr,
7320                                         void *res)
7321 {
7322         struct compound_hdr hdr;
7323         int status;
7324
7325         status = decode_compound_hdr(xdr, &hdr);
7326         if (!status)
7327                 status = decode_destroy_clientid(xdr, res);
7328         return status;
7329 }
7330
7331 /*
7332  * Decode SEQUENCE response
7333  */
7334 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7335                                  struct xdr_stream *xdr,
7336                                  void *res)
7337 {
7338         struct compound_hdr hdr;
7339         int status;
7340
7341         status = decode_compound_hdr(xdr, &hdr);
7342         if (!status)
7343                 status = decode_sequence(xdr, res, rqstp);
7344         return status;
7345 }
7346
7347 /*
7348  * Decode GET_LEASE_TIME response
7349  */
7350 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7351                                        struct xdr_stream *xdr,
7352                                        void *data)
7353 {
7354         struct nfs4_get_lease_time_res *res = data;
7355         struct compound_hdr hdr;
7356         int status;
7357
7358         status = decode_compound_hdr(xdr, &hdr);
7359         if (!status)
7360                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7361         if (!status)
7362                 status = decode_putrootfh(xdr);
7363         if (!status)
7364                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7365         return status;
7366 }
7367
7368 /*
7369  * Decode RECLAIM_COMPLETE response
7370  */
7371 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7372                                          struct xdr_stream *xdr,
7373                                          void *data)
7374 {
7375         struct nfs41_reclaim_complete_res *res = data;
7376         struct compound_hdr hdr;
7377         int status;
7378
7379         status = decode_compound_hdr(xdr, &hdr);
7380         if (!status)
7381                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7382         if (!status)
7383                 status = decode_reclaim_complete(xdr, NULL);
7384         return status;
7385 }
7386
7387 /*
7388  * Decode GETDEVINFO response
7389  */
7390 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7391                                       struct xdr_stream *xdr,
7392                                       void *data)
7393 {
7394         struct nfs4_getdeviceinfo_res *res = data;
7395         struct compound_hdr hdr;
7396         int status;
7397
7398         status = decode_compound_hdr(xdr, &hdr);
7399         if (status != 0)
7400                 goto out;
7401         status = decode_sequence(xdr, &res->seq_res, rqstp);
7402         if (status != 0)
7403                 goto out;
7404         status = decode_getdeviceinfo(xdr, res);
7405 out:
7406         return status;
7407 }
7408
7409 /*
7410  * Decode LAYOUTGET response
7411  */
7412 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7413                                   struct xdr_stream *xdr,
7414                                   void *data)
7415 {
7416         struct nfs4_layoutget_res *res = data;
7417         struct compound_hdr hdr;
7418         int status;
7419
7420         status = decode_compound_hdr(xdr, &hdr);
7421         if (status)
7422                 goto out;
7423         status = decode_sequence(xdr, &res->seq_res, rqstp);
7424         if (status)
7425                 goto out;
7426         status = decode_putfh(xdr);
7427         if (status)
7428                 goto out;
7429         status = decode_layoutget(xdr, rqstp, res);
7430 out:
7431         return status;
7432 }
7433
7434 /*
7435  * Decode LAYOUTRETURN response
7436  */
7437 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7438                                      struct xdr_stream *xdr,
7439                                      void *data)
7440 {
7441         struct nfs4_layoutreturn_res *res = data;
7442         struct compound_hdr hdr;
7443         int status;
7444
7445         status = decode_compound_hdr(xdr, &hdr);
7446         if (status)
7447                 goto out;
7448         status = decode_sequence(xdr, &res->seq_res, rqstp);
7449         if (status)
7450                 goto out;
7451         status = decode_putfh(xdr);
7452         if (status)
7453                 goto out;
7454         status = decode_layoutreturn(xdr, res);
7455 out:
7456         return status;
7457 }
7458
7459 /*
7460  * Decode LAYOUTCOMMIT response
7461  */
7462 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7463                                      struct xdr_stream *xdr,
7464                                      void *data)
7465 {
7466         struct nfs4_layoutcommit_res *res = data;
7467         struct compound_hdr hdr;
7468         int status;
7469
7470         status = decode_compound_hdr(xdr, &hdr);
7471         if (status)
7472                 goto out;
7473         status = decode_sequence(xdr, &res->seq_res, rqstp);
7474         if (status)
7475                 goto out;
7476         status = decode_putfh(xdr);
7477         if (status)
7478                 goto out;
7479         status = decode_layoutcommit(xdr, rqstp, res);
7480         if (status)
7481                 goto out;
7482         decode_getfattr(xdr, res->fattr, res->server);
7483 out:
7484         return status;
7485 }
7486
7487 /*
7488  * Decode SECINFO_NO_NAME response
7489  */
7490 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7491                                         struct xdr_stream *xdr,
7492                                         void *data)
7493 {
7494         struct nfs4_secinfo_res *res = data;
7495         struct compound_hdr hdr;
7496         int status;
7497
7498         status = decode_compound_hdr(xdr, &hdr);
7499         if (status)
7500                 goto out;
7501         status = decode_sequence(xdr, &res->seq_res, rqstp);
7502         if (status)
7503                 goto out;
7504         status = decode_putrootfh(xdr);
7505         if (status)
7506                 goto out;
7507         status = decode_secinfo_no_name(xdr, res);
7508 out:
7509         return status;
7510 }
7511
7512 /*
7513  * Decode TEST_STATEID response
7514  */
7515 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7516                                      struct xdr_stream *xdr,
7517                                      void *data)
7518 {
7519         struct nfs41_test_stateid_res *res = data;
7520         struct compound_hdr hdr;
7521         int status;
7522
7523         status = decode_compound_hdr(xdr, &hdr);
7524         if (status)
7525                 goto out;
7526         status = decode_sequence(xdr, &res->seq_res, rqstp);
7527         if (status)
7528                 goto out;
7529         status = decode_test_stateid(xdr, res);
7530 out:
7531         return status;
7532 }
7533
7534 /*
7535  * Decode FREE_STATEID response
7536  */
7537 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7538                                      struct xdr_stream *xdr,
7539                                      void *data)
7540 {
7541         struct nfs41_free_stateid_res *res = data;
7542         struct compound_hdr hdr;
7543         int status;
7544
7545         status = decode_compound_hdr(xdr, &hdr);
7546         if (status)
7547                 goto out;
7548         status = decode_sequence(xdr, &res->seq_res, rqstp);
7549         if (status)
7550                 goto out;
7551         status = decode_free_stateid(xdr, res);
7552 out:
7553         return status;
7554 }
7555 #endif /* CONFIG_NFS_V4_1 */
7556
7557 /**
7558  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7559  *                      the local page cache.
7560  * @xdr: XDR stream where entry resides
7561  * @entry: buffer to fill in with entry data
7562  * @plus: boolean indicating whether this should be a readdirplus entry
7563  *
7564  * Returns zero if successful, otherwise a negative errno value is
7565  * returned.
7566  *
7567  * This function is not invoked during READDIR reply decoding, but
7568  * rather whenever an application invokes the getdents(2) system call
7569  * on a directory already in our cache.
7570  */
7571 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7572                        bool plus)
7573 {
7574         unsigned int savep;
7575         uint32_t bitmap[3] = {0};
7576         uint32_t len;
7577         uint64_t new_cookie;
7578         __be32 *p = xdr_inline_decode(xdr, 4);
7579         if (unlikely(!p))
7580                 goto out_overflow;
7581         if (*p == xdr_zero) {
7582                 p = xdr_inline_decode(xdr, 4);
7583                 if (unlikely(!p))
7584                         goto out_overflow;
7585                 if (*p == xdr_zero)
7586                         return -EAGAIN;
7587                 entry->eof = 1;
7588                 return -EBADCOOKIE;
7589         }
7590
7591         p = xdr_inline_decode(xdr, 12);
7592         if (unlikely(!p))
7593                 goto out_overflow;
7594         p = xdr_decode_hyper(p, &new_cookie);
7595         entry->len = be32_to_cpup(p);
7596
7597         p = xdr_inline_decode(xdr, entry->len);
7598         if (unlikely(!p))
7599                 goto out_overflow;
7600         entry->name = (const char *) p;
7601
7602         /*
7603          * In case the server doesn't return an inode number,
7604          * we fake one here.  (We don't use inode number 0,
7605          * since glibc seems to choke on it...)
7606          */
7607         entry->ino = 1;
7608         entry->fattr->valid = 0;
7609
7610         if (decode_attr_bitmap(xdr, bitmap) < 0)
7611                 goto out_overflow;
7612
7613         if (decode_attr_length(xdr, &len, &savep) < 0)
7614                 goto out_overflow;
7615
7616         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7617                         NULL, entry->label, entry->server) < 0)
7618                 goto out_overflow;
7619         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7620                 entry->ino = entry->fattr->mounted_on_fileid;
7621         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7622                 entry->ino = entry->fattr->fileid;
7623
7624         entry->d_type = DT_UNKNOWN;
7625         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7626                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7627
7628         entry->prev_cookie = entry->cookie;
7629         entry->cookie = new_cookie;
7630
7631         return 0;
7632
7633 out_overflow:
7634         print_overflow_msg(__func__, xdr);
7635         return -EAGAIN;
7636 }
7637
7638 /*
7639  * We need to translate between nfs status return values and
7640  * the local errno values which may not be the same.
7641  */
7642 static struct {
7643         int stat;
7644         int errno;
7645 } nfs_errtbl[] = {
7646         { NFS4_OK,              0               },
7647         { NFS4ERR_PERM,         -EPERM          },
7648         { NFS4ERR_NOENT,        -ENOENT         },
7649         { NFS4ERR_IO,           -errno_NFSERR_IO},
7650         { NFS4ERR_NXIO,         -ENXIO          },
7651         { NFS4ERR_ACCESS,       -EACCES         },
7652         { NFS4ERR_EXIST,        -EEXIST         },
7653         { NFS4ERR_XDEV,         -EXDEV          },
7654         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7655         { NFS4ERR_ISDIR,        -EISDIR         },
7656         { NFS4ERR_INVAL,        -EINVAL         },
7657         { NFS4ERR_FBIG,         -EFBIG          },
7658         { NFS4ERR_NOSPC,        -ENOSPC         },
7659         { NFS4ERR_ROFS,         -EROFS          },
7660         { NFS4ERR_MLINK,        -EMLINK         },
7661         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7662         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7663         { NFS4ERR_DQUOT,        -EDQUOT         },
7664         { NFS4ERR_STALE,        -ESTALE         },
7665         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7666         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7667         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7668         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7669         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7670         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7671         { NFS4ERR_LOCKED,       -EAGAIN         },
7672         { NFS4ERR_SYMLINK,      -ELOOP          },
7673         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7674         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7675         { -1,                   -EIO            }
7676 };
7677
7678 /*
7679  * Convert an NFS error code to a local one.
7680  * This one is used jointly by NFSv2 and NFSv3.
7681  */
7682 static int
7683 nfs4_stat_to_errno(int stat)
7684 {
7685         int i;
7686         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7687                 if (nfs_errtbl[i].stat == stat)
7688                         return nfs_errtbl[i].errno;
7689         }
7690         if (stat <= 10000 || stat > 10100) {
7691                 /* The server is looney tunes. */
7692                 return -EREMOTEIO;
7693         }
7694         /* If we cannot translate the error, the recovery routines should
7695          * handle it.
7696          * Note: remaining NFSv4 error codes have values > 10000, so should
7697          * not conflict with native Linux error codes.
7698          */
7699         return -stat;
7700 }
7701
7702 #ifdef CONFIG_NFS_V4_2
7703 #include "nfs42xdr.c"
7704 #endif /* CONFIG_NFS_V4_2 */
7705
7706 #define PROC(proc, argtype, restype)                            \
7707 [NFSPROC4_CLNT_##proc] = {                                      \
7708         .p_proc   = NFSPROC4_COMPOUND,                          \
7709         .p_encode = nfs4_xdr_##argtype,                         \
7710         .p_decode = nfs4_xdr_##restype,                         \
7711         .p_arglen = NFS4_##argtype##_sz,                        \
7712         .p_replen = NFS4_##restype##_sz,                        \
7713         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7714         .p_name   = #proc,                                      \
7715 }
7716
7717 #define STUB(proc)              \
7718 [NFSPROC4_CLNT_##proc] = {      \
7719         .p_name = #proc,        \
7720 }
7721
7722 #if defined(CONFIG_NFS_V4_1)
7723 #define PROC41(proc, argtype, restype)                          \
7724         PROC(proc, argtype, restype)
7725 #else
7726 #define PROC41(proc, argtype, restype)                          \
7727         STUB(proc)
7728 #endif
7729
7730 #if defined(CONFIG_NFS_V4_2)
7731 #define PROC42(proc, argtype, restype)                          \
7732         PROC(proc, argtype, restype)
7733 #else
7734 #define PROC42(proc, argtype, restype)                          \
7735         STUB(proc)
7736 #endif
7737
7738 const struct rpc_procinfo nfs4_procedures[] = {
7739         PROC(READ,              enc_read,               dec_read),
7740         PROC(WRITE,             enc_write,              dec_write),
7741         PROC(COMMIT,            enc_commit,             dec_commit),
7742         PROC(OPEN,              enc_open,               dec_open),
7743         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7744         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7745         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7746         PROC(CLOSE,             enc_close,              dec_close),
7747         PROC(SETATTR,           enc_setattr,            dec_setattr),
7748         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7749         PROC(RENEW,             enc_renew,              dec_renew),
7750         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7751         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7752         PROC(LOCK,              enc_lock,               dec_lock),
7753         PROC(LOCKT,             enc_lockt,              dec_lockt),
7754         PROC(LOCKU,             enc_locku,              dec_locku),
7755         PROC(ACCESS,            enc_access,             dec_access),
7756         PROC(GETATTR,           enc_getattr,            dec_getattr),
7757         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7758         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7759         PROC(REMOVE,            enc_remove,             dec_remove),
7760         PROC(RENAME,            enc_rename,             dec_rename),
7761         PROC(LINK,              enc_link,               dec_link),
7762         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7763         PROC(CREATE,            enc_create,             dec_create),
7764         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7765         PROC(STATFS,            enc_statfs,             dec_statfs),
7766         PROC(READLINK,          enc_readlink,           dec_readlink),
7767         PROC(READDIR,           enc_readdir,            dec_readdir),
7768         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7769         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7770         PROC(GETACL,            enc_getacl,             dec_getacl),
7771         PROC(SETACL,            enc_setacl,             dec_setacl),
7772         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7773         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7774         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7775         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7776         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7777         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7778         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7779         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7780         PROC41(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
7781         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7782         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7783         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7784         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7785         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7786         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7787         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7788         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7789         STUB(GETDEVICELIST),
7790         PROC41(BIND_CONN_TO_SESSION,
7791                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7792         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7793         PROC42(SEEK,            enc_seek,               dec_seek),
7794         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7795         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7796         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7797         PROC42(CLONE,           enc_clone,              dec_clone),
7798         PROC42(COPY,            enc_copy,               dec_copy),
7799         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7800         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7801 };
7802
7803 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7804 const struct rpc_version nfs_version4 = {
7805         .number                 = 4,
7806         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7807         .procs                  = nfs4_procedures,
7808         .counts                 = nfs_version4_counts,
7809 };
7810
7811 /*
7812  * Local variables:
7813  *  c-basic-offset: 8
7814  * End:
7815  */